BSC6900 GSM Initial Configuration Guide(V900R013C00_03)(PDF)-En

BSC6900 GSM V900R013C00

Initial Configuration Guide Issue

03

Date

2011-08-31

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2011. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders.

Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied. The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute the warranty of any kind, express or implied.

Huawei Technologies Co., Ltd. Address:

Huawei Industrial Base Bantian, Longgang Shenzhen 518129 People's Republic of China

Website:

http://www.huawei.com

Email:

[email protected]

Issue 03 (2011-08-31)

Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

i

BSC6900 GSM Initial Configuration Guide

About This Document

About This Document Purpose This document describes the initial configuration of BSC6900.

Product Version The following table lists the product version related to this document. Product Name

Product Version

BSC6900

V900R013C00

Intended Audience This document is intended for: l

Field engineers

l

Network operators

l

System engineers

Organization 1 Changes in the BSC6900 GSM Initial Configuration Guide This chapter describes the changes in the BSC6900 GSM Initial Configuration Guide. 2 Introduction to Initial Configuration Initial configuration creates the configuration script for the equipment to start to operate. 3 Data Preparation for Initial Configuration In the BSC6900 initial configuration, some data is obtained from the data sheets after negotiation with other network elements. The negotiated data includes the global data, equipment data, interface data, base station data, and cell data. 4 Initial Configuration Procedures Issue 03 (2011-08-31)


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About This Document

This chapter describes the process of creating the initial configuration script for the BSC6900. 5 Typical Configuration Script The typical configuration scripts used in this document derive from the documents related to the BSC6900. The typical configuration scripts concern global data, equipment data, network interfaces, base stations, and cells. 6 Configuring the Global Information This chapter describes how to configure the global information. The global data configuration provides a basis for all the other configurations, and therefore must be determined during network planning. After the BSC6900 global data configuration takes effect, do not modify it unless the network is replanned. 7 Configuring the Equipment Data This chapter provides the example script for configuring the equipment data for the BSC6900, including the system information and the data about the cabinet, subrack, and board. 8 Configuring the Interfaces This chapter describes how to configure the GSM interfaces, including the Ater, A, Gb, and Pb interfaces. 9 Configuring a BTS This section describes how to configure a BTS and its cells for BSC6900. The configurations described in this section enable a BTS to receive and transmit signals over air interfaces and meet the requirements of the radio coverage in the cells. In addition, they also enable BSC6900 to centrally control and manage radio resources for the BTS. 10 Configuration Reference Information This chapter describes the concepts, principles, rules, and conventions related to data configuration.

Conventions Symbol Conventions The symbols that may be found in this document are defined as follows. Symbol

Description Indicates a hazard with a high level of risk, which if not avoided, will result in death or serious injury. Indicates a hazard with a medium or low level of risk, which if not avoided, could result in minor or moderate injury. Indicates a potentially hazardous situation, which if not avoided, could result in equipment damage, data loss, performance degradation, or unexpected results. Indicates a tip that may help you solve a problem or save time.

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About This Document

Symbol

Description Provides additional information to emphasize or supplement important points of the main text.

General Conventions The general conventions that may be found in this document are defined as follows. Convention

Description

Times New Roman

Normal paragraphs are in Times New Roman.

Boldface

Names of files, directories, folders, and users are in boldface. For example, log in as user root.

Italic

Book titles are in italics.

Courier New

Examples of information displayed on the screen are in Courier New.

Command Conventions The command conventions that may be found in this document are defined as follows. Convention

Description

Boldface

The keywords of a command line are in boldface.

Italic

Command arguments are in italics.

[]

Items (keywords or arguments) in brackets [ ] are optional.

{ x | y | ... }

Optional items are grouped in braces and separated by vertical bars. One item is selected.

[ x | y | ... ]

Optional items are grouped in brackets and separated by vertical bars. One item is selected or no item is selected.

{ x | y | ... }*

Optional items are grouped in braces and separated by vertical bars. A minimum of one item or a maximum of all items can be selected.

[ x | y | ... ]*

Optional items are grouped in brackets and separated by vertical bars. Several items or no item can be selected.

GUI Conventions The GUI conventions that may be found in this document are defined as follows.

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About This Document

Convention

Description

Boldface

Buttons, menus, parameters, tabs, window, and dialog titles are in boldface. For example, click OK.

>

Multi-level menus are in boldface and separated by the ">" signs. For example, choose File > Create > Folder.

Keyboard Operations The keyboard operations that may be found in this document are defined as follows. Format

Description

Key

Press the key. For example, press Enter and press Tab.

Key 1+Key 2

Press the keys concurrently. For example, pressing Ctrl+Alt +A means the three keys should be pressed concurrently.

Key 1, Key 2

Press the keys in turn. For example, pressing Alt, A means the two keys should be pressed in turn.

Mouse Operations The mouse operations that may be found in this document are defined as follows.

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Action

Description

Click

Select and release the primary mouse button without moving the pointer.

Double-click

Press the primary mouse button twice continuously and quickly without moving the pointer.

Drag

Press and hold the primary mouse button and move the pointer to a certain position.


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Contents

Contents About This Document.....................................................................................................................ii 1 Changes in the BSC6900 GSM Initial Configuration Guide................................................1 2 Introduction to Initial Configuration........................................................................................3 3 Data Preparation for Initial Configuration..............................................................................4 4 Initial Configuration Procedures................................................................................................5 5 Typical Configuration Script......................................................................................................8 6 Configuring the Global Information.........................................................................................9 6.1 Configuring the Basic Information...................................................................................................................10 6.2 Configuring the OPC and DPC........................................................................................................................10 6.3 Configuring the M3UA Local and Destination Entities...................................................................................11

7 Configuring the Equipment Data.............................................................................................12 7.1 Configuring the System Information................................................................................................................14 7.2 Configuring a Cabinet......................................................................................................................................14 7.3 Configuring a Subrack......................................................................................................................................14 7.4 Configuring a Board.........................................................................................................................................15 7.5 Configuring an EMU........................................................................................................................................16 7.6 Configuring the Clocks.....................................................................................................................................16 7.7 Configuring the Time.......................................................................................................................................19 7.8 Configuring BSC Custom Alarm.....................................................................................................................19

8 Configuring the Interfaces.........................................................................................................20 8.1 Configuring the Ater Interface (over TDM).....................................................................................................21 8.2 Configuring the Ater Interface (over IP)..........................................................................................................22 8.3 Configuring the A Interface (over TDM).........................................................................................................23 8.4 Configuring the A Interface (over IP)..............................................................................................................23 8.4.1 Configuring the Physical Layer and Data Link Layer of the A Interface (over IP)................................23 8.4.2 Configuring the Control Plane of the A Interface (over IP)....................................................................27 8.4.3 Configuring the Mapping Between Service Types and Transmission Resources...................................28 8.4.4 Configuring the User Plane of the A Interface (over IP).........................................................................28 8.5 Configuring the Gb Interface (over FR)...........................................................................................................29 8.6 Configuring the Gb Interface (over IP)............................................................................................................29 Issue 03 (2011-08-31)


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Contents

8.7 Configuring the Pb Interface............................................................................................................................30

9 Configuring a BTS.......................................................................................................................32 9.1 Configuring the Equipment Data......................................................................................................................34 9.1.1 Configuring a BTS...................................................................................................................................34 9.1.2 Configuring BTS Cabinet........................................................................................................................35 9.1.3 Configuring BTS Boards.........................................................................................................................35 9.1.4 Configuring RF Units..............................................................................................................................36 9.2 Configuring the Logical Data...........................................................................................................................37 9.3 Configuring the Transmission Data..................................................................................................................38 9.3.1 TDM/HDLC............................................................................................................................................38 9.3.2 IP over FE/GE.........................................................................................................................................38 9.3.3 IP over E1................................................................................................................................................40 9.4 Configuring a Clock for a BTS.........................................................................................................................41 9.5 Activating the BTS Configuration....................................................................................................................41 9.6 Optional Functions of BTS...............................................................................................................................42 9.6.1 Configuring the Neighboring Cell Relations...........................................................................................42 9.6.2 Configuring the BTS Timeslots...............................................................................................................42 9.6.3 Configuring Parameters for Monitoring Boards......................................................................................44 9.6.4 Configuring a Custom BTS Alarm..........................................................................................................45 9.6.5 Configuring BTS Power Alarms.............................................................................................................46 9.6.6 Configuring IP Port Backup....................................................................................................................48 9.6.7 Configuring Connection of Monitoring Devices Through IP Ports........................................................49 9.7 Configuration in the Typical Scenario..............................................................................................................50 9.7.1 Typical BTS3900 Configuration.............................................................................................................50 9.7.2 Typical BTS3900A Configuration..........................................................................................................59

10 Configuration Reference Information...................................................................................68 10.1 Data Configuration Principles for Equipment................................................................................................69 10.1.1 Configuration Rules of the Cabinets.....................................................................................................69 10.1.2 Configuration Rules of the Subracks.....................................................................................................69 10.1.3 Configuration Rules of the Boards........................................................................................................69 10.1.4 Configuration Rules of the Clock..........................................................................................................72 10.1.5 Introduction to Time Synchronization...................................................................................................73 10.2 Data Configuration Principles for Interfaces..................................................................................................73 10.2.1 Data Configuration Principles for the A Interface.................................................................................73 10.2.2 Data Configuration Principles for the Ater Interface............................................................................89 10.2.3 Data Configuration Principles for the Gb Interface...............................................................................92 10.2.4 Data Configuration Principles for the Pb interface................................................................................98 10.3 Configuration Guidelines for the GBTS.......................................................................................................102 10.3.1 Configuration Guidelines for Cabinet Numbers..................................................................................102 10.3.2 Configuration Guidelines for Subracks...............................................................................................102 10.3.3 Configuration Guidelines for Slot Numbers........................................................................................103 10.3.4 Mapping Between Base Stations and Optional Cabinets....................................................................105 Issue 03 (2011-08-31)


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Contents

10.3.5 Configuration Rules of the BTS Boards..............................................................................................109 10.3.6 Configuration Guidelines for Monitoring Boards...............................................................................115 10.3.7 Configuration Guidelines for Power Systems.....................................................................................120 10.3.8 List of User-Defined Alarm Ports.......................................................................................................121 10.3.9 Guidelines for Configuring Send and Receive Modes for RF Modules..............................................128 10.3.10 Configuration Guidelines for Typical TRX Power...........................................................................131 10.3.11 Configuration Guidelines for BTS Clock Sources............................................................................131 10.3.12 BTS Network Topologies..................................................................................................................133 10.3.13 TDM-Based Networking on the Abis Interface.................................................................................137 10.3.14 IP-Based Networking on the Abis Interface......................................................................................137 10.3.15 Typical Configuration Scenarios of the Radio Layer .......................................................................139 10.3.16 Concepts of the BTS Multiplexing Mode..........................................................................................140 10.3.17 Instances of BTS Multiplexing Modes..............................................................................................141 10.3.18 Timeslot Assignment on the Abis Interface......................................................................................145 10.3.19 Timeslot Arrangement on the Abis Interface....................................................................................147 10.3.20 Manual Timeslot Assignment on the Abis Interface.........................................................................149 10.3.21 Semipermanent Connection...............................................................................................................150 10.3.22 Principles of Idle Timeslot Assignment............................................................................................150 10.3.23 Configuration Guidelines for DFCU/DFCB......................................................................................151 10.3.24 Configuration Guidelines for Upgrading Cabinets from Version 8.x to Version 9.0........................152 10.4 Data Configuration Guidelines for Specifications........................................................................................158

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1 Changes in the BSC6900 GSM Initial Configuration Guide

Changes in the BSC6900 GSM Initial Configuration Guide

This chapter describes the changes in the BSC6900 GSM Initial Configuration Guide.

03 (2011-08-31) This is the third commercial release of V900R013C00. Compared with issue 02 (2011-04-25), this issue includes the following new topics: l

10.3.18 Timeslot Assignment on the Abis Interface

l

10.3.19 Timeslot Arrangement on the Abis Interface

l

10.3.20 Manual Timeslot Assignment on the Abis Interface

l

10.3.21 Semipermanent Connection

l

10.3.22 Principles of Idle Timeslot Assignment

Compared with issue 02 (2011-04-25), this issue incorporates the following changes: Content

Description

9.6.1 Configuring the Neighboring Cell Relations

The configurations of LTE external cells are added.

10.3.7 Configuration Guidelines for Power Systems

The APM30(Ver.C) and the BTS3900 (Ver.C) are added.

10.3.3 Configuration Guidelines for Slot Numbers

The description of the UBRI board is modified.

Compared with issue 02 (2011-04-25), this issue does not exclude any topics.

02 (2011-04-25) This is the second commercial release of V900R013C00. Compared with issue 01 (2011-03-30), this issue does not include any new topics. Compared with issue 01 (2011-03-30), this issue incorporates the following changes: Issue 03 (2011-08-31)


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1 Changes in the BSC6900 GSM Initial Configuration Guide

Content

Description

GSM Data Preparation for the Initial Configuration

The recommended configurations of some parameters are added.

Configuring the Clocks

The procedure for configuring the external clock, line clock, and GPS clock is optimized.

Compared with issue 01 (2011-03-30), this issue excludes the following topics: l

Data Configuration Principles for Numbering

01 (2011-03-30) This is the first commercial release of V900R013C00. Compared with issue Draft A (2011-01-31), this issue does not include any new topics. Compared with issue Draft A (2011-01-31), this issue does not incorporate any changes. Compared with issue Draft A (2011-01-31), this issue does not exclude any topics.

Draft A (2011-01-31) This is the Draft A release of V900R013C00. Compared with issue 04 (2010-11-30) of V900R012C01, this issue includes the following new topics: l

9.6.5 Configuring BTS Power Alarms

l

9.6.6 Configuring IP Port Backup

l

9.6.7 Configuring Connection of Monitoring Devices Through IP Ports

Compared with issue 04 (2010-11-30) of V900R012C01, this issue incorporates the following changes: Content

Description

10.4 Data Configuration Guidelines for Specifications

The specifications are updated.

Compared with issue 04 (2010-11-30) of V900R012C01, this issue does not exclude any topics.

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2 Introduction to Initial Configuration

Introduction to Initial Configuration

Initial configuration creates the configuration script for the equipment to start to operate. l

The configuration script can be created by running MML commands on the BSC6900 LMT. For the LMT operation guide, see the BSC6900 GSM LMT User Guide.

l

During commissioning, the script is imported to the BSC6900. For data modification after the BSC6900 starts operating, see the GBSS Reconfiguration Guide.

l

After the BSC6900 starts operating, operators can enable or disable features based on site requirements. The related data configuration does not belong to initial configuration. For details, see the GBSS Feature Activation Guide.

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3 Data Preparation for Initial Configuration

Data Preparation for Initial Configuration In the BSC6900 initial configuration, some data is obtained from the data sheets after negotiation with other network elements. The negotiated data includes the global data, equipment data, interface data, base station data, and cell data. For the data preparation for BSC6900 initial configuration, see GSM Data Preparation for the Initial Configuration. For the restrictions on the parameter settings in MML commands, see BSC6900 GSM MML Command Reference.

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4 Initial Configuration Procedures

4

Initial Configuration Procedures

This chapter describes the process of creating the initial configuration script for the BSC6900. Figure 4-1 shows the initial configuration process. Figure 4-1 Initial configuration process

For details about loading the BSC6900 initial configuration data, see the BSC6900 GSM Commissioning Guide.

Scenario: BM/TC separated and built-in PCU The initial configuration process is as follows: Issue 03 (2011-08-31)


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1.

Open the initial configuration tool. For example, log in to the BSC6900 LMT.

2.

Configure the global information.

3.

Configure the equipment data. (1) Configure the MPR, EPR, and TCR. (2) Configure the MPS, EPS, and TCS. (3) Configure the SCU, OMU, GCU, XPU, SPU, DPU, EIUa, FG2a, GOUa, OIUa, POUc, and PEUa boards.

4.

Configure the GSM interfaces. (1) Configure the Ater interface by referring to Configuring the Ater Interface (over TDM) or Configuring the Ater Interface (over IP). (2) Configure the A interface by referring to Configuring the A Interface (over TDM) or Configuring the A Interface (over IP). (3) Configure the Gb interface by referring to Configuring the Gb Interface (over FR) or Configuring the Gb Interface (over IP).

5.

Configure a BTS.

6.

Save the initial configuration script.

Scenario: BM/TC separated and external PCU The initial configuration process is as follows: 1.


2.


3.

Configure the equipment data. (1) Configure the MPR, EPR, and TCR. (2) Configure the MPS, EPS, and TCS. (3) Configure the SCU, OMU, GCU, XPU, SPU, DPU, EIUa, FG2a, GOUa, OIUa, POUc, and PEUa boards.

4.

Configure the GSM interfaces. (1) Configure the Ater interface by referring to Configuring the Ater Interface (over TDM) or Configuring the Ater Interface (over IP). (2) Configure the A interface by referring to Configuring the A Interface (over TDM) or Configuring the A Interface (over IP). (3) Configure the Pb interface.

5.

Configure a BTS.

6.


Scenario: BM/TC combined and built-in PCU The initial configuration process is as follows: 1.


2.


3.

Configure the equipment data. (1) Configure the MPR and EPR.

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(2) Configure the MPS and EPS. (3) Configure the SCU, OMU, GCU, XPU, SPU, DPU, EIUa, FG2a, GOUa, OIUa, POUc, and PEUa boards. 4.

Configure the GSM interfaces. (1) Configure the A interface by referring to Configuring the A Interface (over TDM) or Configuring the A Interface (over IP). (2) Configure the Gb interface by referring to Configuring the Gb Interface (over FR) or Configuring the Gb Interface (over IP).

5.

Configure a BTS.

6.


Scenario: BM/TC combined and external PCU The initial configuration process is as follows: 1.


2.


3.

Configure the equipment data. (1) Configure the MPR and EPR. (2) Configure the MPS and EPS. (3) Configure the SCU, OMU, GCU, XPU, SPU, DPU, EIUa, FG2a, GOUa, OIUa, POUc, and PEUa boards.

4.

Configure the GSM interfaces. (1) Configure the A interface by referring to Configuring the A Interface (over TDM) or Configuring the A Interface (over IP). (2) Configure the Pb interface.

5.

Configure a BTS.

6.


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5 Typical Configuration Script

5

Typical Configuration Script

The typical configuration scripts used in this document derive from the documents related to the BSC6900. The typical configuration scripts concern global data, equipment data, network interfaces, base stations, and cells. For details of the BSC6900 typical configuration scripts, see the GSM Typical Configuration Scripts.

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6

6 Configuring the Global Information

Configuring the Global Information

About This Chapter This chapter describes how to configure the global information. The global data configuration provides a basis for all the other configurations, and therefore must be determined during network planning. After the BSC6900 global data configuration takes effect, do not modify it unless the network is replanned. 1.

6.1 Configuring the Basic Information This section describes how to configure the basic data of the BSC6900. The configuration of the BSC6900 basic data is the prerequisite for the initial configuration.

2.

6.2 Configuring the OPC and DPC This section describes how to configure the OPC and DPC.

3.

6.3 Configuring the M3UA Local and Destination Entities This section describes how to configure the local and destination M3UA entities. You need to configure the M3UA entities when the IP-based networking is used.

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6.1 Configuring the Basic Information This section describes how to configure the basic data of the BSC6900. The configuration of the BSC6900 basic data is the prerequisite for the initial configuration.

Prerequisite l

All the subracks are switched to the ineffective mode by running the SET CFGDATAINEFFECTIVE command.

l

The basic data is not configured.

Procedure Step 1 Run the SET BSCBASIC command to set the basic GSM data. Step 2 Run the ADD GCNOPERATOR command to add a primary GSM operator. In this step, set Operator Type to PRIM(Primary Operator). Step 3 Optional: To add more secondary GSM operators, run the ADD GCNOPERATOR command for each operator you want to add. In this step, set Operator Type to SEC(Secondary Operator). Step 4 Optional: Run the LST GLOBALROUTESW command to query the setting of the global route management switch. If the global route management function is not required but the global route management switch is set to ON, run the SET GLOBALROUTESW command to set the switch to OFF. ----End

6.2 Configuring the OPC and DPC This section describes how to configure the OPC and DPC.

Prerequisite l

The basic data of the BSC6900 has been configured. For details, see Configuring the Basic Data.

l

The MSC server is not directly connected to the BSC6900. Instead, routes are configured on the MGW to transfer data between the BSC6900 and the MSC server.

l

The network ID and the signaling point code must be planned in the SS7 network.

l

When configuring a DPC, specify the signaling route mask for load sharing. When configuring a signaling link set, specify the signaling link mask to determine the policy of routing between signaling links within that signaling link set. The result of the signaling route mask AND the signaling link mask should be 0.

Context

Procedure Step 1 Run the ADD OPC command to add an OPC, repeat this step until all desired OPCs are added. Issue 03 (2011-08-31)


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Step 2 Run the ADD N7DPC command to add a DPC. To add more DPCs, repeat this step until all desired DPCs are added. ----End

6.3 Configuring the M3UA Local and Destination Entities This section describes how to configure the local and destination M3UA entities. You need to configure the M3UA entities when the IP-based networking is used.

Prerequisite The OPC and DPC are configured. For details, see Configuring the OPC and DPC.

Procedure Step 1 Run the ADD M3LE command to add an M3UA local entity. Step 2 Run the ADD M3DE command to add an M3UA destination entity. ----End

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7 Configuring the Equipment Data

Configuring the Equipment Data

About This Chapter This chapter provides the example script for configuring the equipment data for the BSC6900, including the system information and the data about the cabinet, subrack, and board.

Context Familiarize yourself with 10.1 Data Configuration Principles for Equipment before performing the operations described in this chapter. 1.

7.1 Configuring the System Information This section describes how to configure the system information of the BSC6900.

2.

7.2 Configuring a Cabinet This section describes how to configure a cabinet for the BSC6900. You need to configure the cabinet based on the requirements specified in the actual network planning.

3.

7.3 Configuring a Subrack This section describes how to configure a subrack for the BSC6900. You need to configure the subrack based on the requirements specified in the actual network planning.

4.

7.4 Configuring a Board This section describes how to configure a board for the BSC6900. You need to configure the board based on the requirements specified in the actual network planning.

5.

7.5 Configuring an EMU This section describes how to configure an EMU. An EMU is required for the BSC6900 to collect the Boolean value, analog value, and alarm threshold information.

6.

7.6 Configuring the Clocks This section describes how to configure the BSC6900 clocks. You need to configure the clock source of interface boards, clock source of the system, and work mode of the system clock source.

7.

7.7 Configuring the Time This section describes how to configure the time of the BSC6900. You need to set the time zone, daylight saving time, and Simple Network Time Protocol (SNTP) synchronization server.

8.

7.8 Configuring BSC Custom Alarm

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This section describes how to configure alarm ports, alarm IDs, and alarm names of the BSC.

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7.1 Configuring the System Information This section describes how to configure the system information of the BSC6900.

Prerequisite The basic data of the BSC6900 is configured. For details, see Configuring the Basic Data.

Context The system information consists of the system description, system ID, contact information of the vendor, system location, and system services.

Procedure Step 1 Run the SET SYS command to set the system information. ----End

7.2 Configuring a Cabinet This section describes how to configure a cabinet for the BSC6900. You need to configure the cabinet based on the requirements specified in the actual network planning.


Context The Main Processing Rack (MPR) is configured by default. You do not need to add it through the MML command.

Procedure Step 1 Run the ADD CAB command to add an Extended Processing Rack (EPR). Step 2 Optional: In BM/TC separated mode, run the ADD CAB command to add a TransCoder Rack (TCR). ----End

7.3 Configuring a Subrack This section describes how to configure a subrack for the BSC6900. You need to configure the subrack based on the requirements specified in the actual network planning.

Prerequisite The basic data of the BSC6900 has been configured. For details, see Configuring the Basic Data. Issue 03 (2011-08-31)


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Context The Main Processing Subrack (MPS) is configured by default. You do not need to add this subrack by running an MML command.

Procedure Step 1 To add an Extended Processing Subrack (EPS) for the BSC6900, run the ADD SUBRACK command. To add more EPSs, repeat this step until all desired EPSs are added. Step 2 To add a TransCoder Subrack (TCS) for the BSC6900, run the ADD SUBRACK command. To add more TCSs, repeat this step until all desired TCSs are added. Step 3 After a subrack is added, run the SET SCUPORT command to enable the corresponding port on the SCU board in the MPS. Step 4 Run the SET CFGDATAEFFECTIVE command to set the subrack to effective mode. ----End

Follow-up Procedure To enable the monitoring function of the power distribution box, complete the following steps: 1.

Run the MOD SUBRACK command to enable the monitoring function of the power distribution box. In this step: l Set Subrack No. to the number of the subrack connected to the power distribution box. l Set Connect power monitoring board to YES.

2.

Run the SET PWRPARA command to set the parameters of the power monitoring board.

3.

Run the SET PWRALMSW command to set the alarm switch on the power monitoring board. NOTE

If output-alarm information needs to be viewed, set the corresponding switch on the PDB to ON. Otherwise, set the corresponding switch on the PDB to OFF. There is no need to set the input switch on the PDB for input alarms.

7.4 Configuring a Board This section describes how to configure a board for the BSC6900. You need to configure the board based on the requirements specified in the actual network planning.

Context l

For the data to be negotiated and planned for configuring a board for the BSC6900, see Data Preparation for Initial Configuration.

l

For details about the board configuration rules, see Configuration Rules of the Boards.

Procedure Step 1 Run the ADD BRD command to add a board to the BSC6900. To add more boards, run this command repeatedly. Issue 03 (2011-08-31)


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Step 2 Optional: When the boards work in active/standby mode, run the SET MSP command to set the attributes of the Multiplex Section Protection (MSP). ----End

7.5 Configuring an EMU This section describes how to configure an EMU. An EMU is required for the BSC6900 to collect the Boolean value, analog value, and alarm threshold information.

Prerequisite The subrack for housing the EMU is already configured.

Context l

The EMU gathers Boolean values, analog values, and alarm threshold information and reports them to the LMT.

l

One cabinet can be configured with only one EMU.

Procedure Step 1 Run the ADD EMU command to add an EMU. ----End

7.6 Configuring the Clocks This section describes how to configure the BSC6900 clocks. You need to configure the clock source of interface boards, clock source of the system, and work mode of the system clock source.

Prerequisite The basic data of the BSC6900 has been configured. For details, see Configuring the Basic Data.

Context NOTE

The BSC6900 clock information is determined during network planning. In an all-IP over FE/GE network, you do not need to configure a clock source for the BSC6900, and at this time, the BSC use the local oscillator as default.

The clock source of the BSC6900 can be an external clock, line clock, or GPS clock. l

External clock An external clock can be a BITS clock or an external 8 kHz clock. When the clock source is an external clock, the BSC6900 receives the external clock from CLKIN0 or CLKIN1 on the GCUa/GCGa board.

l

Line clock The line clock is the 8 kHz clock transmitted from an interface board to the GCUa board. It can be an A interface line clock or an Abis interface line clock. An A interface line clock is extracted by a BSC6900 A interface board from the MSC. An Abis interface line clock

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is extracted from a BSC6900 Abis interface board from the transport network, and the base station can synchronize its clock with the BSC6900 clock. NOTE

l A interface line clock l When the BSC uses the A interface line clock and FR transmission is used on the Gb interface, if the the Gb interface is configured on the independent board, the clock is selected as follows: If the SGSN and the MSC use the same clock source, you do not need to configure the Gb interface clock. If the SGSN and the MSC use different clock sources, you need to configure line clocks on both the A and Gb interface boards. In the latter case, set Use SGSN clock source to YES, and set Port for LINE1 and Back-up port for LINE1 to the numbers of the interface board ports carrying BC. l When the BSC uses the A interface line clock and FR transmission is used on the Gb interface, if the Gb interface and the A/Ater/Abis interface are configured on the same board, you can not set Use SGSN clock source to YES. l Abis interface line clock When the BSC6900 uses the Abis interface line clock, the TDM transport network must provide stable clock information. The Abis interface line clock is recommended when the A interface uses IP transmission and the Abis interface uses TDM transmission.If the Gb interface and the A/Ater/Abis interface are configured on the same board, you can not set Use SGSN clock source to YES.

l

GPS clock The GPS clock is the satellite synchronization clock. When the GCGa board is configured with a satellite card, the BSC6900 can use the satellite antenna port on the GCGa board to receive GPS clock signals.

Procedure l

Configuring the external clock 1.

Run the ADD CLKSRC command to add a system clock source and the clock source priority. NOTE

l Clock source type l If the clock signals are extracted from the CN by the interface board (such as the OIUa/ EIUa/PEUa interface board) in the EPS and then sent to the GCUa/GCGa board in the MPS through the panels, Clock source type of the MPS needs to be set to BITS1-2MHZ or BITS2-2MHZ. l If the clock signals are extracted from the CN by the interface board in the MPS and then sent to the GCUa/GCGa board through the backplane of the MPS, Clock source type should be set to LINE1_8KHZ or LINE2_8KHZ. l If the clock signals are provided by the external BITS, Clock source type should be set to BITS1-2MBPS, BITS2-2MBPS, BITS1-1.5MBPS, or BITS2-1.5MBPS. l If the clock signals are provided by the GPS and then sent to the GCGa board, Clock source type should be set to GPS. l If the clock signals are provided by the external 8 kHz clock, Clock source type should be set to 8KHZ. l Clock source priority Clock source priority ranges from 1 to 4. The clock source of priority 0 is configured by default. Priority 0 is the lowest priority. The descending ranking of priorities is 1, 2, 3, and 4.

2. Issue 03 (2011-08-31)

Run the SET CLKMODE command to set the work mode of the system clock source. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

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7 Configuring the Equipment Data NOTE

It is recommended that System clock working mode be set to AUTO(Auto Handover) so that the system can switch to the highest-priority clock source when the current clock source is unavailable.

l

Configuring the line clock 1.

Run the SET CLK command to set the clock source of the interface board. NOTE

When the system clock is the line clock, interface boards need to be configured with clock sources. l A interface line clock In BM/TC combined configuration mode, the A interface board of the MPS needs to be configured with a clock source. In addition, the link number for the clock source needs to be specified, and the backplane 8 kbit/s clock output switch needs to be turned on. In BM/TC separated configuration mode, the interface boards in both the TCS and MPS need to be configured with clock sources. l For the TCS, the A interface board of the TCS needs to be configured with a clock source. In addition, the link number for the clock source needs to be specified, and the backplane 8 kbit/s clock output switch needs to be turned on. If multiple TCSs are configured, the A interface board of each TCS needs to be configured with a line clock, and different TCSs need to be configured with different clock sources. l For the MPS, the Ater interface board of the MPS needs to be configured with a clock source. In addition, the link number for the clock source needs to be specified, and the backplane 8 kbit/s clock output switch needs to be turned on. l Abis interface line clock The Abis interface board needs to be configured with a clock source. In addition, the link number for the clock source needs to be specified, and the backplane 8 kbit/s clock output switch needs to be turned on.

2.

Run the ADD CLKSRC command to add a system clock source and the clock source priority.

3.

Run the SET CLKMODE command to set the work mode of the system clock source. NOTE


l

Configuring the GPS clock 1.

If the clock source is the line clock, run the SET CLK command to set the clock source for the interface board.

2.

Run the ADD CLKSRC command to add a system clock source and the clock source priority.

3.

Run the SET CLKMODE command to set the work mode of the system clock source. NOTE


----End

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Follow-up Procedure To reconfigure the system clock source and clock source priority, run the SET CLKMODE command.

7.7 Configuring the Time This section describes how to configure the time of the BSC6900. You need to set the time zone, daylight saving time, and Simple Network Time Protocol (SNTP) synchronization server.


Procedure Step 1 Run the SET TZ command to set the time zone and daylight saving time of the BSC6900. Step 2 Run the ADD SNTPSRVINFO command to add the information about the SNTP synchronization server. Step 3 Run the SET SNTPCLTPARA command to set the synchronization period of the SNTP client. ----End

7.8 Configuring BSC Custom Alarm This section describes how to configure alarm ports, alarm IDs, and alarm names of the BSC.

Prerequisite l

An environment monitoring unit and the sensor regarding environment alarms are installed.

l

Data of the environment monitoring unit is configured. For details, see Configuring an EMU.

Context Each environment alarm is allocated a unique alarm ID. The IDs of the BSC environment alarms range from 65334 to 65383.

Procedure Step 1 Run the SET ALMPORT command to set the environment alarm input port of the BSC. Step 2 Run the SET ENVALMPARA command. In this step, set Alarm ID, Alarm Name, Alarm Severity, and Event Type. ----End

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8 Configuring the Interfaces

8

Configuring the Interfaces

About This Chapter This chapter describes how to configure the GSM interfaces, including the Ater, A, Gb, and Pb interfaces. 8.1 Configuring the Ater Interface (over TDM) This section describes how to configure the TDM-based Ater interface to implement the communication between the MPS/EPS and the TCS when the BSC6900 is in BM/TC separated mode. 8.2 Configuring the Ater Interface (over IP) This section describes how to configure the IP-based Ater interface to improve the transmission efficiency and reduce transmission cost over the Ater interface when the BSC6900 is in BM/TC separated and remote TCS mode. 8.3 Configuring the A Interface (over TDM) This section describes how to configure the TDM-based A interface in BM/TC separated mode or BM/TC combined mode. 8.4 Configuring the A Interface (over IP) This section describes how to configure the IP-based A interface. 8.5 Configuring the Gb Interface (over FR) This section describes how to configure the FR-based Gb interface for the communication between the SGSN and the BSC6900 configured with the built-in PCU. You need to configure the Network Service Entity (NSE), Bearer Channel (BC), Network Service Virtual Connection (NSVC), and Point to Point BSSGP Virtual Connection (PTPBVC). 8.6 Configuring the Gb Interface (over IP) This section describes how to configure the IP-based Gb interface for communication between the SGSN and the BSC6900 configured with the built-in PCU. You need to configure the NSE, local NSVL, remote NSVL, and PTPBVC. 8.7 Configuring the Pb Interface This section describes how to configure the Pb interface for the communication between the PCU and the BSC6900 configured with the external PCU. You need to configure the E1 link and signaling link.

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8.1 Configuring the Ater Interface (over TDM) This section describes how to configure the TDM-based Ater interface to implement the communication between the MPS/EPS and the TCS when the BSC6900 is in BM/TC separated mode.

Prerequisite l

The subrack to be configured with an Ater connection path is configured.

l

The EIUa/OIUa/POUc board is configured in the subrack to be configured with an Ater connection path.

l

If the TCS is configured locally, the Ater connection path must be configured. If the TCS is configured remotely, the Ater connection path, Ater OML, and Ater signaling link must be configured and the Ater OML needs to be established only between the MPS and the main TCS.

l

The Ater connection path is established between EIUa boards or between OIUa boards. You can specify different ports to configure more than one Ater connection path between interface boards.

l

If the TCS is configured locally:

Context

Procedure 1.

Configure an Ater connection path. (1) Run the ADD ATERCONPATH command to add an Ater connection path between the MPS and the TCS. (2) In TC pool mode, run the ADD ATERE1T1 command to add an Ater connection path between the BSC6900 and the TC.

l

If the TCS is configured remotely: 1.

Configure an Ater connection path. (1) Run the ADD ATERCONPATH command to add an Ater connection path between the MPS and the main TCS. (2) In TC pool mode, run the ADD ATERE1T1 command to add an Ater connection path between the BSC6900 and the TC.

2.

Run the ADD ATEROML command to add an Ater OML between the MPS and the main TCS. NOTE

l At least four consecutive timeslots except timeslot 1 must be used for Ater OMLs. l It is recommended that a pair of active and standby Ater OMLs be configured. l If the BIOS version of the EIUa/OIUa board is earlier than 215, the Ater OML of the primary BSC must be configured on the Ater connection path that is carried on port 0. l In TC pool mode, the secondary BSCs do not need to be configured with Ater OMLs.

3.

Issue 03 (2011-08-31)

Run the ADD ATERSL command to add an Ater signaling link between the MPS/ EPS and the TCS. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

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8 Configuring the Interfaces NOTE

l Timeslot 1 of the local main TCS and remote main TCS is reserved and cannot be configured. Timeslot 1 of other TCSs can be configured. l A maximum of 64 timeslots on each Ater interface board can be used for Ater signaling links.

----End

8.2 Configuring the Ater Interface (over IP) This section describes how to configure the IP-based Ater interface to improve the transmission efficiency and reduce transmission cost over the Ater interface when the BSC6900 is in BM/TC separated and remote TCS mode.

Prerequisite l

A license for implementing IP transmission over the Ater interface has been obtained.

l

The subrack to be configured with an Ater connection path is configured.

l

The POUc board is configured in the subrack to be configured with an Ater connection path.

l

The Ater connection path, OMLs, and signaling links are configured. For details, see Configuring the Ater Interface (over TDM).

Context In the case of IP over Ater, IP over Ethernet is not supported over the Ater interface, and the user plane can adopt only the IP over E1/T1 transmission mode. The data configuration for the signaling plane similar to that in the case of TDM over Ater.

Procedure Step 1 Configure the physical layer and data link layer for the POUc board. Step 2 Run the SET BSCBASIC command. In this step: l Set Service mode to SEPARATE. l Set Ater Interface Transfer Mode to IP. Step 3 Run the ADD ADJNODE command to add an adjacent node. In this step, set Adjacent Node Type to BSC. Step 4 Optional: Configure transmission resource mapping. 1.

Run the ADD TRMMAP command to add a transmission resource mapping table for the Ater interface.

2.

Run the ADD TRMFACTOR command to add an activation factor table for the Ater interface.

3.

Run the ADD ADJMAP command to add the TRM mapping to the adjacent node and to add the mapping from interface transmission type to TRMMAP index and factor index.

Step 5 Run the ADD IPPATH command to add an IP path. To add more IP paths, repeat this step until all desired IP paths are added. ----End Issue 03 (2011-08-31)


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8.3 Configuring the A Interface (over TDM) This section describes how to configure the TDM-based A interface in BM/TC separated mode or BM/TC combined mode.

Prerequisite l

The basic data of the BSC6900 is configured. For details, see Configuring the Basic Data.

l

The OPC and DPC are configured. For details, see Configuring the OPC and DPC.

l

The EIUa/OIUa/POUc/XPUa board is configured. For details, see Configuring a Board.

Procedure Step 1 Run the ADD GCNNODE command to add a GSM CN node. Step 2 Run the ADD AE1T1 command to add an E1/T1 over the A interface. Step 3 Run the ADD MTP3LKS command to add an MTP3 signaling link set. Step 4 Run the ADD MTP3LNK command to add an MTP3 signaling link. Step 5 Run the ADD MTP3RT command to add an MTP3 route. ----End

8.4 Configuring the A Interface (over IP) This section describes how to configure the IP-based A interface.

Prerequisite A license for implementing IP transmission over the A interface is granted.

8.4.1 Configuring the Physical Layer and Data Link Layer of the A Interface (over IP) This section describes how to configure the physical layer and data link layer of the A interface on the BSC6900 in IP transmission mode. Before the configuration, specify the type of interface board according to network planning.

Configuring the Physical Layer and Data Link Layer for the FG2a/GOUa/FG2c/ GOUc Board This section describes how to configure the physical layer and data link layer for the FG2a/FG2c/ GOUa/GOUc board, which is used as the interface board of the BSC6900. You need to set the Ethernet port attributes, add the standby Ethernet port, add the IP address of the Ethernet port, add the link aggregation group, add the link to the link aggregation group, add the IP address of the link aggregation group, and add the device IP address.

Prerequisite The basic data of the BSC6900 has been configured. For details, see Configuring the Basic Data. Issue 03 (2011-08-31)


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Procedure Step 1 Set the Ethernet port attributes. 1.

Run the LST ETHPORT command to list the attributes of the Ethernet port.

2.

Optional: If the planned data is inconsistent with the default data, run the SET ETHPORT command to set the attributes of the Ethernet port.

Step 2 Optional: Run the ADD ETHREDPORT command to configure Ethernet port backup. Step 3 Optional: Run the ADD DEVIP command to add the device IP address of the board in the case of logical IP networking. In this step, set Device IP Address Type to LOGIC_IP. Step 4 Check whether the link aggregation function is required and then perform the corresponding step. If you select...

Then...

Link non-aggregation mode

Go to Step 5.

Link aggregation mode

Go to Step 7.

Step 5 In link non-aggregation mode, run the ADD ETHIP command to add the IP address of the Ethernet port. When multiple VLAN gateways are planned, repeat this step until all the IP addresses are added. Step 6 Optional: Run the ADD VLANID command to add an IP address to the VLAN ID mapping table. Step 7 In link aggregation mode, complete the following steps: 1.

Run the ADD ETHTRK command to add a link aggregation group. NOTE

You can run the DSP ETHTRK command to query the status of a link aggregation group.

2.

Run the ADD ETHTRKLNK command to add a link to the link aggregation group. To add more links to the link aggregation group, repeat this step until all desired links are added. NOTE

l You can run the DSP ETHTRKLNK command to query the status of a link in a link aggregation group and the related statistics. l The links in a link aggregation group can be carried by non-adjacent ports. l The port to which a link aggregation group is bound and a port on another board cannot work in active/standby mode or load sharing mode. l If a link in a link aggregation group becomes faulty, the system automatically removes this link. When this link becomes normal, the port carrying this link automatically negotiates with the peer end. If the negotiation is successful, the link is automatically added to the link aggregation group.

3.

Run the ADD ETHTRKIP command to add the IP address of the link aggregation group. When multiple VLAN gateways are planned, repeat this step until all the IP addresses are added.

----End

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Configuring the Physical Layer and Data Link Layer for the PEUa Board This section describes how to configure the physical layer and data link layer for the PEUa board, which is used as the interface board of the BSC6900. You need to set the E1/T1 attributes and device IP address, and configure the PPP link, MP link group, and MP link.


Context The MP link group is also referred to as PPP link group. Either a PPP link or an MP link group must be configured.

Procedure Step 1 Set the E1/T1 link attributes. 1.

Run the LST E1T1 command to list the attributes of an E1/T1 link.

2.

Optional: If the planned data is inconsistent with the default data, run the SET E1T1 command to set the attributes of the E1/T1 link.

Step 2 Optional: Run the ADD DEVIP command to add the device IP address of the board in the case of logical IP networking. In this step, set Device IP Address Type to LOGIC_IP. Step 3 Determine the type of link carried on the E1/T1 link (PPP link or MP link group) and perform the corresponding step. If the E1/T1 link carries a/an...

Then...

PPP link

Go to Step 4.

MP link group

Go to Step 5.

Step 4 Configure a PPP link. Run the ADD PPPLNK command to add a PPP link. To add more PPP links, run this command repeatedly. In this step: l Set Board type to PEUa. l Set Logic function type to IP. l It is recommended that Borrow DevIP be set to YES. Step 5 Add an MP link group. 1.

Run the ADD MPGRP command to add an MP link group. In this step: l Set Board type to PEUa. l Set Logic function type to IP. l It is recommended that Borrow DevIP be set to YES.

2.

Run the ADD MPLNK command to add an MP link. To add more MP links, run this command repeatedly. Set Board type to PEUa.

----End Issue 03 (2011-08-31)


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Configuring the Physical Layer and Data Link Layer for the POUc Board This section describes how to configure the physical layer and data link layer for the POUc board, which is used as the interface board of the BSC6900. You need to set the E1/T1 attributes, optical port attributes, and attributes of a channelized optical port. In addition, you need to configure the PPP link, MP link group, and MP link.


Context The MP link group is also referred to as PPP link group. Either a PPP link or an MP link group must be configured.

Procedure Step 1 Set the E1/T1 link attributes. 1.

Run the LST E1T1 command to list the attributes of an E1/T1 link.

2.

Optional: If the planned data is inconsistent with the default data, run the SET E1T1 command to set the attributes of the E1/T1 link.

Step 2 Set the optical port attributes. 1.

Run the LST OPT command to list the attributes of an optical port.

2.

Optional: If the planned data is inconsistent with the default data, run the SET OPT command to set the attributes of the optical port.

Step 3 Optional: When the BSC6900 needs to interconnect with the equipment from another vendor, run the SET COPTLNK command to set the attributes of a channelized optical port on the interface board. Step 4 Optional: Run the ADD DEVIP command to add the device IP address of the board in the case of logical IP networking. In this step, set Device IP Address Type to LOGIC_IP. Step 5 Determine the type of link carried on the E1/T1 link (PPP link or MP link group) and perform the corresponding step. If the E1/T1 link carries a/an...

Then...

PPP link

Go to Step 6.

MP link group

Go to Step 7.

Step 6 Configure a PPP link. Run the ADD PPPLNK command to add a PPP link. To add more PPP links, repeat this step until all desired PPP links are added. In this step: l Set Board type to POUc. l It is recommended that Borrow DevIP be set to YES. Step 7 Add an MP link group. 1.

Run the ADD MPGRP command to add an MP link group. In this step: l Set Board type to POUc.

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l It is recommended that Borrow DevIP be set to YES. 2.

Run the ADD MPLNK command to add an MP link. To add more MP links, repeat this step until all desired MP links are added. Set Board Type to POUc.

----End

8.4.2 Configuring the Control Plane of the A Interface (over IP) This section describes how to configure the control plane of the IP-based A interface on the BSC6900 side. You need to configure the SCTP link, M3UA link set, M3UA route, M3UA link, and adjacent node.

Prerequisite l

The M3UA local and destination entities are configured. For details, see Configuring the M3UA Local and Destination Entities.

l

The physical layer and data link layer of the A interface are configured. For details, see 8.4.1 Configuring the Physical Layer and Data Link Layer of the A Interface (over IP).

Procedure Step 1 Run the ADD GCNNODE command to add a GSM CN node. Step 2 Run the ADD SCTPLNK command to add an SCTP link. To add more SCTP links, run this command repeatedly. In this step: l Set Signalling link mode to CLIENT. l Set Application type to M3UA. Step 3 Run the ADD M3LKS command to add an M3UA link set. In this step: l When Local entity type is set to M3UA_IPSP, Work mode of the M3UA link set must be set to M3UA_IPSP. l When Local entity type is set to M3UA_ASP, Work mode of the M3UA link set must be set to M3UA_IPSP if Destination entity type is set to M3UA_SP, or Work mode of the M3UA link set must be set to M3UA_ASP if the destination entity type is either of the other two values. NOTE

You can set Local entity type through the ADD M3LE command and set Destination entity type through the ADD M3DE command.

Step 4 Run the ADD M3RT command to add an M3UA route. Step 5 Run the ADD M3LNK command to add an M3UA link. To add more M3UA links, run this command repeatedly. Step 6 Run the ADD ADJNODE command to add an adjacent node. Set Adjacent Node Type to A. ----End

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8.4.3 Configuring the Mapping Between Service Types and Transmission Resources This section describes how to configure the mapping between the service types and transmission resources for the adjacent node. You can configure the TRM mapping table and activity factor table for users with different priorities.


Procedure Step 1 Run the ADD TRMMAP command to add a TRM mapping table. To add more TRM mapping tables, run this command repeatedly. Step 2 Run the ADD TRMFACTOR command to add an activity factor table. Step 3 Run the ADD ADJMAP command to configure the TRM mapping table and activity factor table for users with different priorities. ----End

8.4.4 Configuring the User Plane of the A Interface (over IP) This section describes how to configure the user plane of the A interface on the BSC6900 in IP transmission mode. You need to configure the IP path and IP route.

Prerequisite The control plane of the IP-based A interface is configured. For details, see Configuring the Control Plane of the A Interface (over IP).

Procedure Step 1 Run the ADD IPPATH command to add an IP path. To add more IP paths, repeat this step until all desired IP paths are added. NOTE

l If the type of IP path is QoS, the IP path can match any path type in the TRMMAP table. l If the type of IP path is non-QoS, the type should be the one mapped to the service in the TRMMAP table. l You can run the SET PHBMAP command to set the priority of an IP path type. l The transmission bandwidth and reception bandwidth can be set according to the actual network planning.

Step 2 Optional: Run the ADD IPRT command to add an IP route when the layer 3 networking mode is used between the BSC6900 and the MSC/MGW. To add more IP routes, repeat this step until all desired IP routes are added. Step 3 Optional: Run the LST GLOBALROUTESW command to query the value of the global route management switch. If the global route management function is not required but the global route management switch is set to ON, run the SET GLOBALROUTESW command to set the global route management switch to OFF. Issue 03 (2011-08-31)


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Step 4 Run the SET TCTYPE command to set the TC DSP resource type. In this step, set The type of TC resource to ITC. ----End

8.5 Configuring the Gb Interface (over FR) This section describes how to configure the FR-based Gb interface for the communication between the SGSN and the BSC6900 configured with the built-in PCU. You need to configure the Network Service Entity (NSE), Bearer Channel (BC), Network Service Virtual Connection (NSVC), and Point to Point BSSGP Virtual Connection (PTPBVC).

Prerequisite l


l

The DPUd/XPUa/PEUa board is configured. For details, see Configuring a Board.

l

At the Network Service (NS) layer, NSE is represented by a set of NSVCs and is identified by the NSEI.

l

In Gb over FR mode, a BC is a physical bearer channel, which is composed of a certain number of timeslots of the E1/T1.

l

An NSVC is carried by a BC and belongs to only one BC and only one NSE, whereas a BC or NSE can be configured with multiple NSVCs.

l

An NSVC maps to a PVC. When configuring an NSVC, specify its mapping PVC.

l

BSSGP is short for Base Station Subsystem GPRS Protocol.

l

A GPRS cell refers to a cell that is GPRS enabled.

Context

Procedure Step 1 Run the SET BSCPCUTYPE command to set the PCU type. Set PCU Type to INNER. Step 2 Run the ADD SGSNNODE command to add an SGSN node. Step 3 Run the ADD NSE command to add an NSE. Step 4 Run the ADD BC command to add a BC. Step 5 Run the ADD NSVC command to add an NSVC. Step 6 If the BSC6900 cell is configured and the cell supports GPRS, run the ADD PTPBVC command to add a PTPBVC and bind the GPRS cell to its NSE. Step 7 Run the SET BTSIDLETS command to add an idle timeslots of the BTS. ----End

8.6 Configuring the Gb Interface (over IP) This section describes how to configure the IP-based Gb interface for communication between the SGSN and the BSC6900 configured with the built-in PCU. You need to configure the NSE, local NSVL, remote NSVL, and PTPBVC. Issue 03 (2011-08-31)


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Prerequisite l

The basic data of the BSC6900 has been configured. For details, see Configuring the Basic Data.

l

The DPUd/FG2a/XPUa board is configured. For details, see Configuring a Board.

l

A license for implementing IP transmission over the Gb interface is granted.

l

At the Network Service (NS) layer, NSE is represented by a set of NSVCs and is identified by the NSEI.

l

BSSGP is short for Base Station Subsystem GPRS Protocol.

l

A GPRS cell indicates a cell that is GPRS capable.

Context

Procedure Step 1 Configure the physical layer and data link layer for the FG2a/FG2c/GOUa/GOUc board. Step 2 Run the SET BSCPCUTYPE command to set the PCU type as built-in. Step 3 Run the ADD SGSNNODE command to add an SGSN node. Step 4 Run the ADD NSE command to add an NSE. Step 5 Configuring an NSVL 1.

Run the ADD NSVLLOCAL command to add an NSVL on the BSC6900 side.

2.

Optional: If the NSE is in static configuration mode, run the ADD NSVLREMOTE command to add an NSVL on the SGSN side.

Step 6 If the cell is configured and the cell supports GPRS, run the ADD PTPBVC command to add a PTPBVC and bind the GPRS cell and its NSE. Step 7 Optional: Run the ADD IPRT command to add an IP route when the layer 3 networking mode is used between the BSC6900 and the MGW. To add more IP routes, repeat this step until all desired IP routes are added. ----End

8.7 Configuring the Pb Interface This section describes how to configure the Pb interface for the communication between the PCU and the BSC6900 configured with the external PCU. You need to configure the E1 link and signaling link.

Prerequisite l


l

The EIUa/OIUa/POUc board is configured. For details, see Configuring a Board.

Procedure Step 1 Run the SET BSCPCUTYPE command to set the PCU type as external. Issue 03 (2011-08-31)


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Step 2 Run the ADD PCU command to add a PCU. Step 3 Run the ADD PBE1T1 command to add an E1/T1 over the Pb interface. Step 4 Run the ADD PBSL command to add a signaling link over the Pb interface. ----End

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9 Configuring a BTS

9

Configuring a BTS

About This Chapter This section describes how to configure a BTS and its cells for BSC6900. The configurations described in this section enable a BTS to receive and transmit signals over air interfaces and meet the requirements of the radio coverage in the cells. In addition, they also enable BSC6900 to centrally control and manage radio resources for the BTS.

Context BTSs are classified in the following two ways: l

By software version: – SingleRAN base stations: 3900 series base stations whose software versions are V100R009 or later – Non-SingleRAN base stations: 3x series base stations, double-transceiver base stations, and 3900 series base stations whose software versions are earlier than V100R009

l

By base station type: – 3x series base stations: BTS30, BTS312, BTS3012A, and BTS3006A – Double-transceiver base stations: BTS3012, BTS3012II, BTS3012AE, BTS3006C, BTS3002E – 3900 series base stations: BTS3900, BTS3900A, BTS3900L, DBS3900, BTS3900B, and BTS3900E

Procedure ----End 1.

9.1 Configuring the Equipment Data This section describes how to configure data for base station equipment. You need to configure data for the base station, cabinet, base station boards, TRX boards, and antenna boards.

2.

9.2 Configuring the Logical Data This section describes how to configure the logical data for the BTS. You need to configure cell data, binding relation between the cell and the BTS, binding relation between the logical

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9 Configuring a BTS

TRX and the physical TRX board, channel attributes of the TRX, and device attributes of the TRX. 3.

9.3 Configuring the Transmission Data This section describes how to configure the transmission data for the BTS. The transmission mode can be TDM/HDLC, IP over FE/GE, or IP over E1.

4.

9.4 Configuring a Clock for a BTS This section describes how to configure a clock for a BTS, including the configuration of a clock source and a clock server required by an IP-based BTS.

5.

9.5 Activating the BTS Configuration This section describes how to activate the configuration of a BTS. You need to check the data integrity of the BTS, and activate the BTS configuration.

6.

9.6 Optional Functions of BTS In addition to the basic functions, the BTS provides some optional functions. You can configure the optional functions as required.

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9.1 Configuring the Equipment Data This section describes how to configure data for base station equipment. You need to configure data for the base station, cabinet, base station boards, TRX boards, and antenna boards.

9.1.1 Configuring a BTS This section describes how to configure data for a BTS.

Prerequisite l

All types of base stations support the Time Division Multiplexing (TDM), High-Level Data Link Control (HDLC), and Internet Protocol (IP) transmission schemes.

l

Idle ports are available on interface boards.

l

Separate mode indicates that boards and carriers that are configured for a BTS must be configured separately.

l

Normalization mode indicates that the method for numbering slots, subracks, and cabinets is normalized, the method for naming boards is normalized, the method for numbering transmission ports is normalized, and the method for numbering ports reporting customized alarms is normalized when multiple modes are supported at a base station.

Context

Procedure Step 1 Run the ADD BTS command to add a BTS. Table 9-1 Settings of key parameters Parameter

Setting

BTS Name

A BTS name must not contain any of the following symbols: , (comma), ; (semicolon), " (double quotation marks), ' (single quotation marks), =, %, \, +, &, #

Separate Mode

For 3900 series base stations, this parameter must be set to SUPPORT(Support). For BTS3012, BTS3012II, and BTS3012AE, this parameter is set to either SUPPORT (Support) or UNSUPPORT(Not Support). For 3x series base stations, this parameter must be set to UNSUPPORT(Not Support).

Is Support Normalized Data Configuration

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For SingleRAN base stations, this parameter must be set to SUPPORT(Support).


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9 Configuring a BTS

----End

9.1.2 Configuring BTS Cabinet This section describes how to configure data for BTS cabinet.

Prerequisite l

The BTS data are configured. For details, see 9.1.1 Configuring a BTS.

l

The boards in the common slots are automatically added according to the default setting.

l

Antenna boards and TRX boards need to be manually added.

Context

Procedure Step 1 Run the ADD BTSCABINET command to add a cabinet to the base station. NOTE

l For the numbering rule of base station equipment, see 10.3.1 Configuration Guidelines for Cabinet Numbers. l For the configuration rule of base station boards, see 10.3.4 Mapping Between Base Stations and Optional Cabinets. l When Is Support SingleRAN Mode is set to SUPPORT(Support SRAN), the SingleRAN base stations can be configured.

----End

9.1.3 Configuring BTS Boards This section describes how to configure data for boards installed at a BTS.

Prerequisite l

Cabinets of the BTS have been configured. For details on how to configure a BTS cabinet, see 9.1.2 Configuring BTS Cabinet.

l

Idle ports are available on interface boards.

l

The eXtensible Processing Unit REV:a (XPUa) has been configured. For details on how to configure the XPUa board, see Configuring a Board.

Context For the rule for configuring boards, see 10.3.3 Configuration Guidelines for Slot Numbers. Some boards have been configured automatically together with cabinets. For details, see 10.3.5 Configuration Rules of the BTS Boards. For the rule for configuring radio frequency (RF) modules, see 9.1.4 Configuring RF Units.

Procedure Step 1 Run the ADD BTS command to add a board to a BTS. Issue 03 (2011-08-31)


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9 Configuring a BTS

l If a monitoring board is to be added, do as follows: – To configure Subrack No. and Slot No. for a monitoring board, see 10.3.6 Configuration Guidelines for Monitoring Boards. – To configure other parameters for a monitoring board, see 9.6.3 Configuring Parameters for Monitoring Boards. l Board Type can be set to PTU(PTU) only when an IP interface board is added to a doubletransceiver base station. ----End

9.1.4 Configuring RF Units This section describes how to configure data for TRX boards, and antenna boards.

Prerequisite l

The BTS boards are configured. For details, see 9.1.3 Configuring BTS Boards.

l

3X series and double-transceiver series base stations

Context – The DTRU board enables two logical TRXs to be bound to one physical TRX board. – The QTRU board enables six logical TRXs to be bound to one physical TRX board. l

3900 series base stations – The DRRU/DRFU board enables two logical TRXs to be bound to one physical TRX board. – The MRRU/GRFU/MRFU/GRRU board enables eight logical TRXs to be bound to one physical TRX board.

Procedure Step 1 Add TRX boards to the base station. 3X series and double-transceiver series base stations 1.

Run the ADD BTSTRXBRD command to add TRX boards to a base station of the 3X series or double-transceiver series. l In the case of the BTS3012, BTS3012II, and BTS3012AE, the DTRU or QTRU board can be configured if Separate Mode is set to SUPPORT(Support).

3900 series base stations 1.

Run the ADD BTSRXUCHAIN command to add an RXU chain or ring. NOTE

There is no need to add RXU boards or a RXU chain/ring for the BTS3900B.

2.

Run the ADD BTSRXUBRD command to add RXU boards. l For the SingleRAN base stations, Cabinet No., Subrack No., and Subrack No. must be configured. l For the 3900 series base stations RF boards, see 10.3.5 Configuration Rules of the BTS Boards. l If Is Configure Check threshold is set to NO(NO), need set the bandwidth manually.

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9 Configuring a BTS

l RXU Specification must be specified. You can set this parameter based on the actual hardware type of the RXU. For example, if the hardware type is RRU3029, set Board Type to GRRU(GRRU) and RXU Specification to RRU3029(RRU3029 SPEC), and if the hardware type is MRFU V3, set Board Type to MRFU(MRFU) and RXU Specification to MRFU_V3(MRFU V3 SPEC). 3.

Run the SET BTSRXUBP command to set the sending receiving mode and working mode of the RXU board. l The GRRU/GRFU board supports only the GSM(GSM) working mode. l The MRRU/MRFU board supports the GSM(GSM), UMTS(UMTS), and GSM_AND_UMTS(GSM AND UMTS) working modes. l TRX Send and receive modes, see 10.3.9 Guidelines for Configuring Send and Receive Modes for RF Modules. l If a site is configured with a TMA, you need to set the related TMA switch parameters.

Step 2 Optional: Run the ADD BTSANTFEEDERBRD command to add antenna boards to the base station. NOTE

The 3900 series base stations do not need to be configured with antenna boards.

----End

9.2 Configuring the Logical Data This section describes how to configure the logical data for the BTS. You need to configure cell data, binding relation between the cell and the BTS, binding relation between the logical TRX and the physical TRX board, channel attributes of the TRX, and device attributes of the TRX.

Prerequisite l

The data of the operator is configured. For details, see Configuring the Basic Data.

l

The OPC data is configured. For details, see Configuring the OPC and DPC.

l

The equipment data of the BTS is configured. For details, see 9.1 Configuring the Equipment Data.

Procedure Step 1 Add the cell data by running the compound command or atom commands. l Adding the cell data quickly by running the compound command 1.

Run the ADD GCELLQUICKSETUP command to quickly add data to a GSM cell. NOTE

l Currently, GSM900 cells or DCS1800 cells support quick configuration. Co-BCCH cells, such as GSM900/DCS1800 co-BCCH cells do not support quick configuration. l The symbol "&" is used to separate different frequencies. For example, 22&33&44&55.

l Adding the cell data by running the atom commands

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1.

Run the ADD GCELL command to add a cell.

2.

Run the ADD GCELLFREQ command to add frequencies to the cell. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

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9 Configuring a BTS

3.

Run the ADD GCELLOSPMAP command to add the mapping between the cell and the originating signaling point.

4.

Run the ADD GTRX command to add a TRX.

5.

When the GPRS function is enabled, run the MML command SET GCELLGPRS to set the GPRS attributes of the cell.

Step 2 Run the ADD CELLBIND2BTS command to add the binding relation between the cell and the BTS. Step 3 Run the ADD TRXBIND2PHYBRD command to add the binding relation between the logical TRX and the physical TRX board. Step 4 Run the SET GTRXCHAN command to set the channel attributes of the TRX. Step 5 Run the SET GTRXDEV command to set the device attributes of the TRX. ----End

9.3 Configuring the Transmission Data This section describes how to configure the transmission data for the BTS. The transmission mode can be TDM/HDLC, IP over FE/GE, or IP over E1.

9.3.1 TDM/HDLC This section describes how to configure the transmission data when the BTS is in TDM/HDLC transmission mode.

Prerequisite l


l

The logical data of the BTS is configured. For details, see 9.2 Configuring the Logical Data.

l

All types of BTSs support TDM/HDLC transmission.

l

The TDM/HDLC transmission networking, refer to 10.3.13 TDM-Based Networking on the Abis Interface.

Context

Procedure Step 1 Run the ADD BTSCONNECT command to add a connection between the BTS and the BSC6900, between BTSs (including the internal connection of a BTS), or between the BTS and the DXX. To add multiple BTS connections, run this command repeatedly. ----End

9.3.2 IP over FE/GE This section describes how to configure transmission data when the BTS is in IP over FE/GE transmission mode. Issue 03 (2011-08-31)


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9 Configuring a BTS

Prerequisite l

Equipment data of the BTS is configured. For details, see 9.1 Configuring the Equipment Data.

l

Logical data of the BTS is configured. For details, see 9.2 Configuring the Logical Data.

l

Double-transceiver and 3900 series base stations support IP over FE/GE transmission.

l

For details about IP over FE/GE transmission networking, see 10.3.14 IP-Based Networking on the Abis Interface.

Context

Procedure Step 1 Optional: When the planned data is inconsistent with the database configuration data, run the SET ETHPORT command to set attributes of the Ethernet port. Step 2 Optional: Run the ADD ETHREDPORT command to add a backup Ethernet port. Step 3 Optional: If the BSC6900 device IP address is required for communication, run the ADD DEVIP command to add the device IP address of an Abis IP interface board. Step 4 Run the ADD ETHIP command to add the port IP address of the Abis IP interface board. Step 5 Optional: When the BSC6900 and the BTS are on different network segments, run the ADD IPRT command to add an IP route on the BSC6900 side. NOTE

If the global route management function is not required, run the SET GLOBALROUTESW command to turn off the global route management switch.

Step 6 Run the MML command ADD BTSDEVIP to add an IP address to an Ethernet port of the BTS. Step 7 Run the SET BTSIP command to set the IP address of the BTS. Step 8 Run the SET BTSETHPORT command to set port attributes of the BTS. Step 9 Optional: When the BSC6900 and the BTS are on different network segments, run the ADD BTSIPRT command to add an IP route on the BTS side. Step 10 Run the ADD BTSESN command to add the equipment serial number (ESN) of the BTS. Step 11 Run the ADD ADJNODE command to add an adjacent node. Step 12 Run the ADD IPPATH command to add an IP path. To add more IP paths, repeat this step. Step 13 Optional: If the IP transmission efficiency over the Abis interface needs to be improved, configure the Abis-MUX function by performing the following procedure: 1.

Run the ADD IPMUX command to add an IP MUX pipe. In this step, set IP MUX Type to ABISMUX.

2.

Run the ADD BTSABISMUXFLOW command to add the Abis MUX flow to the BTS.

Step 14 Optional: If the QoS of the IP transport network needs to be monitored, configure the Bidirectional Forwarding Detection (BFD) and IP Performance Monitor (IPPM) functions by performing the following procedure: 1. Issue 03 (2011-08-31)

Run the ADD BTSBFD command to add a BFD session on the BTS side. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

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9 Configuring a BTS

2.

Run the ACT IPPM command to start the IPPM function on the BSC6900 side.

3.

Run the ACT BTSIPPM command to start the IPPM function on the BTS side.

Step 15 Optional: If the service VLAN mapping over the Abis interface needs to be configured, perform the following steps: 1.

Run the ADD IPPATH and SET BSCABISPRIMAP commands to configure the Abis priority mapping on the BSC6900 side.

2.

Run the SET BTSVLAN command to set the VLAN ID and VLAN priority on the BTS side.

----End

9.3.3 IP over E1 This section describes how to configure the transmission data when the BTS is in IP over E1 transmission mode.

Prerequisite l


l

The logical data of the BTS is configured. For details, see 9.2 Configuring the Logical Data.

l

Only the 3900 series base stations support IP over E1.

l

The IP over E1 transmission networking, refer to 10.3.14 IP-Based Networking on the Abis Interface.

Context

Procedure Step 1 Run the ADD BTSCONNECT command to add a connection between the BTS and the BSC6900, between BTSs (including the internal connection of a BTS), or between the BTS and the DXX. To add multiple BTS connections, run this command repeatedly. Step 2 Determine the type of link carried on the E1/T1 link (PPP link or MLPPP group) and perform the corresponding step. If the E1/T1 link carries a/an ...

Then...

PPP link

Go to Step 3.

MLPPP group

Go to Step 4.

Step 3 Configure a PPP link. 1.

Run the ADD PPPLNK command to add a PPP link. To add more PPP links, run this command repeatedly.

2.

Run the ADD BTSPPPLNK command to add a BTS PPP link. To add more PPP links, run this command repeatedly.

Step 4 Add an MLPPP group. 1. Issue 03 (2011-08-31)

Run the ADD MPGRP command to add an MLPPP group. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

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9 Configuring a BTS

2.

Run the ADD MPLNK command to add an MLPPP link. To add more MLPPP links, run this command repeatedly.

3.

Run the ADD BTSMPGRP command to add a BTS MLPPP group.

4.

Run the ADD BTSMPLNK command to add a BTS PPP link. To add more PPP links, run this command repeatedly.

Step 5 Run the ADD ADJNODE command to add an adjacent node. Step 6 Run the SET BTSIP command to set the IP address of the BTS. Step 7 Run the ADD BTSESN command to add the ESN of the BTS. Step 8 Run the ADD IPPATH command to add an IP path. To add more IP paths, run this command repeatedly. ----End

9.4 Configuring a Clock for a BTS This section describes how to configure a clock for a BTS, including the configuration of a clock source and a clock server required by an IP-based BTS.

Prerequisite Data of the BTS's equipment has been configured. For details, see 9.1 Configuring the Equipment Data.

Context For the rule for configuring a clock source for a BTS, see 10.3.11 Configuration Guidelines for BTS Clock Sources. If TDM and IP over E1 are applied, TRCBSC_CLK(Trace BSC Clock) is selected by default. If IP over FE is applied, IP_TIME(IP Clock) is selected by default.

Procedure Step 1 Optional: To change the clock source for a BTS, run the SET BTSCLK command. Step 2 Optional: To set a clock server for a BTS adopting the IP clock, run the SET BTSIPCLKPARA command. ----End

9.5 Activating the BTS Configuration This section describes how to activate the configuration of a BTS. You need to check the data integrity of the BTS, and activate the BTS configuration.

Prerequisite The BTS and its cells are already configured. Issue 03 (2011-08-31)


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9 Configuring a BTS

Procedure Step 1 Run the CHK BTS command to check the data integrity of a BTS. Step 2 Run the ACT BTS command to activate the configuration of a BTS. ----End

9.6 Optional Functions of BTS In addition to the basic functions, the BTS provides some optional functions. You can configure the optional functions as required.

9.6.1 Configuring the Neighboring Cell Relations This section describes how to configure the neighboring cell relations between the cells in a BSC6900 or between the cells in different BSC6900s. To configure the neighboring cell relations, you need to configure the external 2G cell, external 3G cell, external LTE cell, and neighboring cells for a cell to meet the handover requirement.

Context l

The cell on which an MS camps before the handover is called the originating cell. The cell on which the MS will camp after the handover is called the target cell.

l

The cells in the BSC6900 can be set to bidirectional neighboring cells or unidirectional neighboring cells.

l

An external cell, that is, a cell in another BSC6900, can be configured only as a unidirectional neighboring cell.

Procedure Step 1 Run the ADD GEXT2GCELL command to add a 2G external cell. Step 2 Run the ADD GEXT3GCELL command to add a 3G external cell. Step 3 Run the ADD GEXTLTECELL command to add a LTE external cell. Step 4 Run the ADD G2GNCELL command to add a 2G neighboring cell for the specified originating cell. Step 5 Run the ADD G3GNCELL command to add a 3G neighboring cell for the specified originating cell. Step 6 Run the ADD GLTENCELL command to add a LTE neighboring cell for the specified originating cell. ----End

9.6.2 Configuring the BTS Timeslots In the network deployment or adjustment phase, you may need to configure the idle timeslots or monitoring timeslots of the BTS according to service requirements. Issue 03 (2011-08-31)


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9 Configuring a BTS

Prerequisite The data of the BTS is configured.

Context l

During network construction, the existing transmission links of the BTS can be used to obtain the required monitoring data. This meets the maintenance requirements of operators, monitors various data on the network, and reduces the transmission link costs. With regard to hardware deployment, a monitoring terminal needs to be installed on the BTS side, and a monitoring device needs to be installed on the BSC6900 side. In terms of software configuration, some of the BTS timeslots need to be used as monitoring timeslots to transmit monitoring data.

l

The idle timeslots of the BTS are used to carry GPRS service data. If the idle timeslots of the BTS do not meet the bandwidth requirement of GPRS traffic, additional idle timeslots can be configured to increase the bandwidth available for GPRS traffic.

l

Some of the allocated timeslots of a BTS can be disabled. This operation is applicable to scenarios where leased transmission links are used. For example, an operator leases only some timeslots on an E1 for traffic purposes.

l

Configuring the BTS monitoring timeslots

Procedure 1.

Run the ADD BTSMONITORTS command to add a monitoring timeslot at the BTS. NOTE

l During timeslot assignment, the transparent transmission rules must be met, that is, the subtimeslots have fixed locations inside a 64 kbit/s timeslot. For example, if sub-timeslot 2 is assigned as the monitoring timeslot of the local BTS, the monitoring timeslot of the upper-level BTS must also be located in sub-timeslot 2. In addition, the board where the BTS is connected to the BSC can be configured only in the BM subrack, and this board must be a TDM interface board or an HDLC interface board. l If a 64 kbit/s monitoring timeslot is configured, the number of its sub-timeslots starts from 0. If a 32 kbit/s monitoring timeslot is configured, the number of its sub-timeslots starts from 0 or 4. If a 16 kbit/s monitoring timeslot is configured, the number of its sub-timeslots starts from 0, 2, 4, or 6. If an 8 kbit/s timeslot is configured, the number of its sub-timeslots can be that of any sub-timeslot in a 64 kbit/s timeslot. l Timeslot 1 of the E1/T1 on the Ater interface of the main TCS is reserved by the system. Therefore, do not configure any monitoring timeslot, semi-permanent link, or SS7 signaling link on this timeslot. l If the BTS uses the physical 16 kbit/s multiplexing mode, the bandwidth of the monitoring timeslot must be 16 kbit/s or 64 kbit/s. l If a BTS or its upper-level BTS uses the HDLC transmission mode, the monitoring timeslot of this BTS must be 64 kbit/s, and the outgoing BTS port of the monitoring timeslot must be an idle port or be the outgoing BTS port of another monitoring timeslot.

l

Configuring the BTS idle timeslots 1.

Run the SET BTSIDLETS command to configure idle timeslots of the BTS. NOTE

Idle timeslots are configured on the basis of BTS cabinet groups. With respect to each cabinet group, no more than 128 idle timeslots can be configured at a time. With respect to each BTS, a maximum of 512 idle timeslots can be configured.

l Issue 03 (2011-08-31)

Configuring the BTS forbidden timeslots Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

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1.

9 Configuring a BTS

Run the SET BTSFORBIDTS command to disable or enable the timeslots of a BTS.

----End

9.6.3 Configuring Parameters for Monitoring Boards This section describes how to configure parameters for monitoring boards of a base station. Monitoring units can monitor the temperature and environment condition of the equipment room. Users can configure monitoring units according to the corresponding plan.

Prerequisite l

For configuration details, see 9.1.3 Configuring BTS Boards.

Context For the configuration rule of each monitoring board of a base station, see 10.3.6 Configuration Guidelines for Monitoring Boards.

Procedure l

Configuring parameters for an EMU 1.

l

Run the command SET BTSDEMUBP to set parameters for a DEMU or EMU.

Configuring parameters for a PMU 1.

Run the command SET BTSAPMUBP to set parameters for an AMPU or PMU. – Set Board Parameter Configuration Enabled to YES(YES). – For the configuration of the parameter Power System Type, see 10.3.7 Configuration Guidelines for Power Systems. If a BBC or IBBS is configured at a base station, the following parameters should be set: – Set Board Parameter Configuration Enabled to YES(YES). – Set Battery Type to VRLA_INNER_BAT(VRLA Inner Battery). – Set Battery Capacity according to the actual configured capacity.

CAUTION You must configure Battery Capacity according to the required capacity. Otherwise, Battery would be faulty. l

Configuring parameters for an FMU 1.

l

Configuring parameters for a TCU 1.

l

Run the command SET BTSFMUABP to set parameters for an FMUA or FMU. Run the command SET BTSDHEUBP to set parameters for a DHEU, DTCU, or TCU.

Configuring parameters for a GATM 1.

Run the command SET BTSDATUBP to set parameters for a GATM.

----End Issue 03 (2011-08-31)


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9 Configuring a BTS

9.6.4 Configuring a Custom BTS Alarm This section describes how to configure a custom BTS alarm. Custom alarms are defined to allow the monitoring board of the BTS to monitor and report ambient environment such as temperature and humidity.

Prerequisite l

The monitoring board and the required cables are installed. For details, see the Hardware Description of the base station.

l

The monitoring board is configured. For details, see 9.1.3 Configuring BTS Boards.

l

The parameters related to the monitoring board are set. For details, see 10.3.6 Configuration Guidelines for Monitoring Boards.

Context Table 9-2 lists the data to be negotiated and planned for configuring a custom BTS alarm. Table 9-2 Data to be negotiated and planned for configuring custom BTS alarms Parameter Category

Parameter Name

Example

Source

Basic Information

BTS Name

BTS01

Network planning

Cabinet No.

0

Network planning

Subrack No.

0

Network planning

Slot No.

40

Network planning

Switch

OPEN

Network planning

Port No.

1

Network planning

Port Type

BOOL

Network planning

Alarm VOL.

HIGH

Network planning

Alarm ID.

65133

Network planning

Alarm Name

Smoke alarm

Network planning

Alarm Severity

Critical

Network planning

Event Type

env

Network planning

Port No.

32

Network planning

Port Type

VALUE

Network planning

Alarm ID.

65366

Network planning

Upper Limit

30000

Network planning

Lower Limit

2000

Network planning

Digit Port

Analog Port

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9 Configuring a BTS

Parameter Category

Parameter Name

Example

Source

Sensor Type

CURRENT

Network planning

Measure Upper Limit Of Sensor

30000

Network planning

Measure Lower Limit Of Sensor

0

Network planning

Upper Limit Of Sensor Output

2000

Network planning

Lower Limit Of Sensor Output

400

Network planning

Alarm Name

Oil Level Alarm

Network planning

Procedure Step 1 Run the MML command SET BTSENVALMPORT to set the alarm port of BTS environment alarms. l The setting of Subrack No. differs by objects. For example, the value for PMU is 7, 8 for TCU, 4-50 for EMU, and 11 for FMU. l Port No. is the port number of a custom alarm. Port No. must map Port on the Monitoring Unit. For details, see 10.3.8 List of User-Defined Alarm Ports. l Switch is OPEN(Open). l For the EMU: – Port on the Monitoring Unit is the port for monitoring Boolean signals. Port Type is BOOL(Digital Port). – Port on the Monitoring Unit is the port for monitoring analog signals. Port Type is VALUE(Analog Port). l A unique alarm ID is assigned to each environment alarm. – The effective environment Alarm ID range of SingleRAN base stations is 65033-65233. – The effective environment Alarm ID range of non-SingleRAN base stations is 65384-65533. Step 2 Run the MML command SET ENVALMPARA to set the name and severity of a custom alarm. l Alarm ID must be the same as that set in SET BTSENVALMPORT. ----End

9.6.5 Configuring BTS Power Alarms This section describes how to configure BTS power alarms. After the BTS power alarms are configured, the BTS will not be reset or report GSM cell out-of-service alarms repeatedly when the mains supply is unavailable. Issue 03 (2011-08-31)


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9 Configuring a BTS

Prerequisite l

A third-party power system is used, and batteries are used when the mains supply is unavailable.

l

The customized alarms, "No Mains Supply" and "DC Low Voltage", are configured. For details, see 9.6.4 Configuring a Custom BTS Alarm.

l

The alarms "No Mains Supply" and "DC Low Voltage" can be configured only on customized alarm ports on the UPEU and UEIU.

l

A BBU cabinet with a +24 V power supply does not support the function.

Context When a third-party power system is used, the "No Mains Supply" alarm can be correlated with the "DC Low Voltage" alarm by configuring BTS power alarms. This prevents the BTS from being reset or reporting GSM cell out-of-service alarms repeatedly. Table 9-3 lists the data to be negotiated and planned for configuring BTS power alarms. Table 9-3 Data to be negotiated and planned for configuring BTS power alarms Parameter

Example

Source

BTS Name

BTS3900_IP

Network planning

Alarm Parameter Configuration Enabled

YES

Network planning

No Mains Supply Alarm Cabinet No.

0

Network planning

No Mains Supply Alarm Subrack No.

40

Network planning

No Mains Supply Alarm Slot No.

0

Network planning

No Mains Supply Alarm Port No.

0

Network planning

DC Low Voltage Alarm Cabinet No.

0

Network planning

DC Low Voltage Alarm Subrack No.

40

Network planning

DC Low Voltage Alarm Slot No.

0

Network planning

DC Low Voltage Alarm Port No.

1

Network planning

Procedure Step 1 Run the MML command SET BTSALMPORT to set the BTS ports for the "No Mains Supply" alarm and the "DC Low Voltage" alarm. Issue 03 (2011-08-31)


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9 Configuring a BTS

l The cabinet number, subrack number, slot number, and port number for the "No Mains Supply" alarm and the "DC Low Voltage" alarm must be consistent with those configured for customized alarms. ----End

9.6.6 Configuring IP Port Backup This section describes how to configure IP port backup of the BTS. The IP port backup function enables services to be quickly switched to the other port when one port fails. This improves transmission reliability.

Prerequisite l

The equipment data of the BTS has been configured. For details, see 9.1 Configuring the Equipment Data.

l

The logical data of the BTS has been configured. For details, see 9.2 Configuring the Logical Data.

l

IP over FE/GE has been configured for the BTS and the BTS communication type has been set to logical IP. For details, see 9.3.2 IP over FE/GE.

Context The BTS has two FE ports, which are configured with IP addresses on different network segments. Address Resolution Protocol (ARP) detection is used to check the status of the two transmission links on the two FE ports. If the transmission on one FE port is interrupted, the BTS transmits data on the transmission link of the other port. IP port backup adopts layer 3 networking in IP over FE mode, as shown in Figure 9-1. Figure 9-1 IP port backup networking

CAUTION ARP detection and single-hop Bidirectional Forwarding Detection (BFD) cannot be used together. If BFD sessions need to be configured during transmission configurations, only multihop BFD can be configured.

Procedure Step 1 Run the MML command ADD BTSDEVIP to add an IP address for the idle FE port of the BTS. Issue 03 (2011-08-31)


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9 Configuring a BTS

NOTE

The other FE port of the BTS has been configured during IP over FE/GE configuration. You can run the LST BTSDEVIP command to query the number of the configured FE port.

Step 2 Run the MML command ADD BTSIPRT to add a route from the BTS to the BSC6900. NOTE

Different priorities need to be set for this route and the route that is configured during IP over FE/GE configuration. You can run the MML command DSP BTSIPRT to query the priority of the route configured for IP over FE/GE transmission.

Step 3 Run the MML command ADD BTSARPSESSION to add an uplink ARP session for the BTS with Route Associated set to YES. NOTE

ARP sessions need to be configured between the BTS and the next hop IP addresses of the two FE ports.

----End

9.6.7 Configuring Connection of Monitoring Devices Through IP Ports This section describes how to configure connection of monitoring devices through IP ports.

Prerequisite l

The equipment data of the BTS has been configured. For details, see 9.1 Configuring the Equipment Data.

l

The logical data of the BTS has been configured. For details, see 9.2 Configuring the Logical Data.

l

IP over FE/GE or IP over E1 has been configured for the BTS. For details, see 9.3.2 IP over FE/GE and 9.3.3 IP over E1.

Context An external monitoring device is used to monitor the ambient environment of the equipment room. Connection of monitoring devices through IP ports is implemented by connecting an Ethernet port on an external monitoring device to an FE port on the GTMU. In this manner, the BTS can transmit the monitoring data to the maintenance terminal of the monitoring device on the IP transport network for processing. The transmission port on the BTS can be an FE or E1/T1 port, depending on the configured transmission mode. The maintenance terminal of the monitoring device can be connected to the IP transport network directly or through the BSC. In the latter case, the BSC forwards the monitoring data from the BTS to the maintenance terminal. Figure 9-2 shows the IP access networking adopted when the maintenance terminal of the monitoring device is directly connected to the IP transport network.

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9 Configuring a BTS

Figure 9-2 IP access networking of monitoring devices

Procedure Step 1 Run the MML command ADD BTSDEVIP to add an IP address for the BTS FE port that connects to the monitoring device. NOTE

The IP address of the BTS FE port and the IP address of the monitoring device must be on the same network segment.

Step 2 Optional: If the BTS and the maintenance terminal of the monitoring device are on different network segments, run the MML command ADD BTSIPRT to add an IP route from the BTS to the maintenance terminal of the monitoring device. Step 3 Optional: If the status of the transmission between the BTS and the monitoring device needs to be checked, run the MML command ADD BTSARPSESSION to add an ARP session between the BTS and the monitoring device with Route Associated set to NO. Step 4 Optional: If monitoring data needs to be forwarded by the BSC6900, run the MML command ADD IPRT to add an IP route from the BSC6900 to the maintenance terminal of the monitoring device. NOTE

l Routes must be configured between the monitoring device and its maintenance terminal for uplink and downlink data transmission. l If the BTS and the maintenance terminal of the monitoring device are on different network segments, a route from the maintenance terminal to the BTS must be configured.

----End

9.7 Configuration in the Typical Scenario This section provides BTS configuration examples in the typical scenario.

9.7.1 Typical BTS3900 Configuration This section describes BTS3900 configuration examples in typical scenarios. The contents of this section include configuration scenarios, monitoring principles, data planning, and task examples. Issue 03 (2011-08-31)


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9 Configuring a BTS

Prerequisite l

BSC6900 global data and equipment data has been configured.

Context The BTS3900 and BSC6900 communicate with each other through the SDH or PDH network. The BTS3900 and BSC6900 are connected through E1/T1 ports on the GTMU and PEUa, as shown in Figure 9-3. Figure 9-3 IP over E1 networking

When a single site is configured with two BTS3900s (-48V DC), monitoring principles and cable connections are shown in Figure 9-4. Figure 9-4 BTS3900 (-48V DC) monitoring principles and cable connections

Data Planning The equipment data that requires negotiation and planning is listed in Table 9-4: Table 9-4 Equipment Data Parameter BTS Issue 03 (2011-08-31)

BTS Index

Example

Data Source

8

Internal planning


51


9 Configuring a BTS

Parameter

Cabinet

Example BTS Name

BTS3900_8

BTS Type

BTS3900_GSM

Seperate Mode

SUPPORT

Service Type

IP

IP Phy Trans Type

IP_OVER_E1

Is Support Normalize d Data Configurati on

SUPPORT

Work Mode

E1

Negotiation with the peer

Cabinet No.

0, 1

Internal planning

Is Support SingleRA N Mode

SUPPORT

Cabinet Type Cabinet No. Board

Physical TRX

Issue 03 (2011-08-31)

Data Source

Network planning

Network planning BTS3900

0

Subrack No.

50, 51

Slot No.

0

Board Type

GATM

Chain No.

0

Topo Type

CHAIN

Head Cabinet No.

0

Head Subrack No.

0

Head Slot No.

6

Internal planning

Network planning

Internal planning


52


9 Configuring a BTS

Parameter

Example Head Port No.

0

Board Type

DRFU

Cabinet No.

0

Subrack No.

4

Slot No.

0

RXU Name

kkk

RXU Chain No.

0

RXU Board Position

1

Data Source

Network planning

Internal planning

The logical data that requires negotiation and planning is listed in Table 9-5: Table 9-5 Logical Data Parameter

Cell Basic Informati on

TRX Informati on

Issue 03 (2011-08-31)

Example Cell Index

8

Cell Name

cell-8

Freq. Band

DCS1800

MCC

460

MNC

01

Cell LAC

H'0001

Cell CI

1

Frequency 1

520

OSP Code

163

TRX ID

8

Frequency

520

TRX No.

0, 1


Data Source

Network planning


Network planning

Network planning

53


9 Configuring a BTS

Parameter

Binding relation between the logical TRX and the physical TRX board

Example Channel Type

MBCCH, SDCCH8

Timeslot Priority

1, 2

TRX Board Pass No. RXU Index Type

Data Source

0 RXUNAME Network planning

The transmission data that requires negotiation and planning is listed in Table 9-6. Table 9-6 Transmission Data (IP over E1) Parameter

Example BTS In Port No.

BTS Connecti on

PPP links of BSC side

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Data Source

0

In Port Cabinet No.

0

In Port Subrack No.

0

In Port Slot No.

6

Dest Node Type

BSC

Subrack No.

0

Slot No.

26

Port No.

0

Subrack No.

0

Slot No.

26

Board type

PEUa


Network planning

Internal planning

54


9 Configuring a BTS

Parameter

Example Logic function type PPP link No. E1T1 port No.

Bearing time slot

Borrow DevIP Local IP address

PPP links of BTS side

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Abis_IP

0 0 TS1-1&TS2-1&TS3-1&TS4-1 &TS5-1&TS6-1&TS7-1&TS8 -1&TS9-1&TS10-1&TS11-1 &TS12-1&TS13-1&TS14-1& TS15-1

Internal planning

NO

9.69.200.1

Subnet mask

255.255.255.0

Peer IP address

9.69.200.192

PPP Link No.

0

Port No.

0

Port Cabinet No.

0

Port Subrack No.

0

Port Slot No.

6

Network planning

Internal planning

Bearing Time Slot

TS1-1&TS2-1&TS3-1&TS4-1 &TS5-1&TS6-1&TS7-1&TS8 -1&TS9-1&TS10-1&TS11-1 &TS12-1&TS13-1&TS14-1& TS15-1

Local IP Address

9.69.200.192

Subnet Mask

Data Source

255.255.255.0


Network planning

55


9 Configuring a BTS

Parameter

BTS Equipme nt Serial Number

Example Peer IP Address

9.69.200.1

BTS Interface Board Bar Code 1

21021127226T93020663

Adjacent Node ID Adjacent Node

BTS IP

IP path

Data Source

0

Adjacent Node Name

IP

Adjacent Node Type

ABIS

Site Index

8

BTS Communic ation Type

PPP/MP

BTS IP

9.69.200.192

BSC IP

9.69.200.1

IP path ID

0

Interface Type

ABIS

IP path type

EF

Forward Bandwidth

1000

Backward Bandwidth

Internal planning

Internal planning

Network planning

Network planning

1000

The parameters of monitoring boards that require negotiation and planning are listed in Table 9-7. Table 9-7 Monitoring Board Parameter

Issue 03 (2011-08-31)

Board Name

Cabinet Number

Subrack Number

Slot Number

Manager Port Number

Communic ation Address

FMU

0

11

0

0

14

FMU

1

11

0

0

15


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9 Configuring a BTS

Board Name

Cabinet Number

Subrack Number

Slot Number

Manager Port Number


GATM

0

50

0

0

22

GATM

0

51

0

1

22

EMU

0

40

0

1

2

BTS user-defined alarms that require negotiation and planning are listed in Table 9-8: Table 9-8 BTS User-Defined Alarm Alarm ID

Alarm Name

Alar m Seve rity

Event Type

Ca bi net No .

Su bra ck No .

Slo t No .

Port No.

Swit ch

Port Typ e

Alar m VO L

65033

Water Alarm

Criti cal

env

0

40

0

0

OPE N

BOO L

HIG H

65034

Smoke Alarm

Criti cal

env

0

40

0

1

OPE N

BOO L

HIG H

65035

Ambie nt Temper ature Abnor mal

Criti cal

env

0

11

0

0

OPE N

BOO L

HIG H

65036


Criti cal

env

1

11

0

0

OPE N

BOO L

HIG H

Example //Adding a BTS and a cabinet ADD BTS: BTSID=8, BTSNAME="BTS3900_8", BTSTYPE=BTS3900_GSM, SEPERATEMODE=SUPPORT, SERVICEMODE=IP, IPPHYTRANSTYPE=IP_OVER_E1, SRANMODE=SUPPORT, WORKMODE=E1; ADD BTSCABINET: IDTYPE=BYID, BTSID=8, CN=0, SRANMODE=SUPPORT, TYPE=BTS3900; ADD BTSCABINET: IDTYPE=BYID, BTSID=8, CN=1, SRANMODE=SUPPORT, TYPE=BTS3900; //Adding a BTS board ADD BTSBRD: IDTYPE=BYID, BTSID=8, CN=0, SRN=50, SN=0, BT=GATM;

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57

BSC6900 GSM Initial Configuration Guide ADD ADD ADD ADD

BTSBRD: BTSBRD: BTSBRD: BTSBRD:

9 Configuring a BTS IDTYPE=BYID, IDTYPE=BYID, IDTYPE=BYID, IDTYPE=BYID,

BTSID=8, BTSID=8, BTSID=8, BTSID=8,

//Configuring parameters of SET BTSDATUBP: IDTYPE=BYID, MPN=0, ADDR=22; SET BTSDATUBP: IDTYPE=BYID, MPN=1, ADDR=22; SET BTSDEMUBP: IDTYPE=BYID, MPN=1, ADDR=2; SET BTSFMUABP: IDTYPE=BYID, MPN=0, ADDR=14; SET BTSFMUABP: IDTYPE=BYID, MPN=0, ADDR=15;

CN=0, CN=0, CN=1, CN=0,

SRN=51, SRN=11, SRN=11, SRN=40,

SN=0, SN=0, SN=0, SN=0,

BT=GATM; BT=FMU; BT=FMU; BT=EMU;

a DATU/DATM/GATM board BTSID=8, CN=0, SRN=50, SN=0, CFGFLAG=YES, BTSID=8, CN=0, SRN=51, SN=0, CFGFLAG=YES, BTSID=8, CN=0, SRN=40, SN=0, CFGFLAG=YES, BTSID=8, CN=0, SRN=11, SN=0, CFGFLAG=YES, BTSID=8, CN=1, SRN=11, SN=0, CFGFLAG=YES,

//Adding an RXU chain or ring ADD BTSRXUCHAIN: IDTYPE=BYID, BTSID=8, RCN=0, TT=CHAIN, HCN=0, HSRN=0, HSN=6, HPN=0; ADD BTSRXUBRD: IDTYPE=BYID, BTSID=8, BT=DRFU, CN=0, SRN=4, SN=0, RXUNAME="kkk", RXUCHAINNO=0, RXUPOS=1; //Adding data to GSM internal cells ADD GCELL:CELLID=8,CELLNAME="cell-8", TYPE=DCS1800, MCC="460", MNC="01", LAC=H'0001, CI=1; ADD GCELLFREQ: IDTYPE=BYID,CELLID=8, FREQ1=520; ADD GCELLOSPMAP: IDTYPE=BYID, CELLID=8, OPC=163; //Adding a TRX ADD GTRX: IDTYPE=BYID,CELLID=8,TRXID=8, FREQ=520; SET GTRXCHAN: TRXID=8, CHNO=0,CHTYPE=MBCCH, TSPRIORITY=1; SET GTRXCHAN: TRXID=8, CHNO=1, CHTYPE=SDCCH8, TSPRIORITY=2; //Adding a cell to a BTS ADD CELLBIND2BTS: IDTYPE=BYID,CELLID=8,BTSID=8; //Adding binding between logic TRX and channel on TRX board ADD TRXBIND2PHYBRD: TRXID=8, TRXTP=DRFU, TRXPN=0, RXUIDTYPE=RXUNAME, RXUNAME="kkk"; //Adding a connection between the BTS and the BSC6900 ADD BTSCONNECT: IDTYPE=BYID, BTSID=8, INPN=0, INCN=0, INSRN=0, INSN=6, DESTNODE=BSC, SRN=0, SN=26, PN=0; // Adding a PPP link ADD PPPLNK: SRN=0, SN=26, BRDTYPE=PEUa, LGCAPPTYPE=Abis_IP, PPPLNKN=0, DS1=0, TSBITMAP=TS1-1&TS2-1&TS3-1&TS4-1&TS5-1&TS6-1&TS7-1&TS8-1&TS9-1&TS10-1&TS1 1-1&TS12-1&TS13-1&TS14-1&TS15-1, BORROWDEVIP=No, LOCALIP="9.69.200.1", MASK="255.255.255.0", PEERIP="9.69.200.192", AUTHTYPE=NO_V, FLOWCTRLSWITCH=ON; // Adding a PPP link on a BTS in IP over E1 transmission mode ADD BTSPPPLNK: IDTYPE=BYID, BTSID=8, PPPLNKN=0, PN=0, CN=0, SRN=0, SN=6,TSBITMAP=TS1-1&TS2-1&TS3-1&TS4-1&TS5-1&TS6-1&TS7-1&TS8-1&TS9-1&TS101&TS11-1&TS12-1&TS13-1&TS14-1&TS15-1, LOCALIP="9.69.200.192", MASK="255.255.255.0", PEERIP="9.69.200.1"; //Adding an adjacent node ADD ADJNODE: ANI=0, NAME="IP", NODET=ABIS, BTSID=8;

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9 Configuring a BTS

//Setting the communication address of a BTS that uses the IP transmission mode SET BTSIP: IDTYPE=BYID, BTSID=8, BTSCOMTYPE=PPP/MP, BTSIP="9.69.200.192", BSCIP="9.69.200.1"; //Adding an equipment serial number (ESN) to response to the DHCP request from the BTS ADD BTSESN: IDTYPE=BYID, BTSID=8,MAINDEVTAB="21021127226T93020663"; // Adding an IP path ADD IPPATH: ANI=0, PATHID=0, ITFT=ABIS, PATHT=EF, TXBW=100000, RXBW=100000, VLANFlAG=DISABLE, PATHCHK=DISABLED; //Activating a BTS ACT BTS:IDTYPE=BYID, BTSID=8; //Setting the alarm port of the BTS environment alarms SET BTSENVALMPORT: IDTYPE=BYID, BTSID=8, CN=0, SRN=40, SN=0, PN=0, SW=OPEN, AID=65033, PT=BOOL, AVOL=HIGH; SET BTSENVALMPORT: IDTYPE=BYID, BTSID=8, CN=0, SRN=40, SN=0, PN=1, SW=OPEN, AID=65034, PT=BOOL, AVOL=HIGH; SET BTSENVALMPORT: IDTYPE=BYID, BTSID=8, CN=0, SRN=11, SN=0, PN=0, SW=OPEN, AID=65035, PT=BOOL, AVOL=HIGH; SET BTSENVALMPORT: IDTYPE=BYID, BTSID=8, CN=1, SRN=11, SN=0, PN=0, SW=OPEN, AID=65036, PT=BOOL, AVOL=HIGH; SET ENVALMPARA: AID=65033, ANM="Water Alarm", ALVL=Critical, ASS=env; SET ENVALMPARA: AID=65034, ANM="Smoke Alarm", ALVL=Critical, ASS=env; SET ENVALMPARA: AID=65035, ANM="Ambient Temperature Abnormal", ALVL=Critical, ASS=env; SET ENVALMPARA: AID=65036, ANM="Ambient Temperature Abnormal", ALVL=Critical, ASS=env;

9.7.2 Typical BTS3900A Configuration This section describes BTS3900A configuration examples in typical scenarios. The contents of this section include configuration scenarios, monitoring principles, data planning, and task examples.

Prerequisite l

BSC6900 global data and equipment data has been configured.

Context The BTS3900A and BSC6900 communicate with each other through the IP network, and the data transmitted between them is processed by the switch according to the data link layer protocol. The BTS3900A and BSC6900 are connected through FE/GE ports on the GTMU and FG2a, as shown in Figure 9-5. Figure 9-5 IP over FE/GE networking

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59


9 Configuring a BTS

In the typical scenario, 1 APM30H, 1 RFC, 2 IBBS200D/IBBS200T, and 1 TMC11H are configured at the BTS3900A (110V/220V AC). Monitoring principles and cable connections are shown in Figure 9-6. Figure 9-6 BTS3900A (110V/220V AC) Monitoring Principles

Data Planning The equipment data that requires negotiation and planning is listed in Table 9-9: Table 9-9 Equipment Data Parameter

BTS

Issue 03 (2011-08-31)

Example BTS Index

9

BTS Name

BTS3900A_9

BTS Type

BTS3900A_GSM

Seperate Mode

SUPPORT

Service Type

IP

Data Source Internal planning

Network planning


60


9 Configuring a BTS

Parameter

Cabinet

Board

Physical TRX

Issue 03 (2011-08-31)

Example

Data Source

IP Phy Trans Type

IP_OVER_E1

Is Support Normalize d Data Configurati on

SUPPORT

Work Mode

E1


Cabinet No.

0, 1, 2, 3, 4

Internal planning

Is Support SingleRA N Mode

SUPPORT

Cabinet Type

APM30, RFC-6, TMC, BBC, BBC,

Cabinet No.

0

Network planning

Subrack No.

7

Slot No.

1, 2, 3

Board Type

PSU

Chain No.

0

Topo Type

CHAIN

Head Cabinet No.

0

Head Subrack No.

0

Head Slot No.

6

Head Port No.

0

Board Type

DRFU

Cabinet No.

1


Internal planning

Network planning

Internal planning

Network planning

61


9 Configuring a BTS

Parameter

Example Subrack No.

4

Slot No.

0, 1

RXU Name

drfu0, drfu1

RXU Chain No.

0

RXU Board Position

1, 2

Data Source

Internal planning

The logical data that requires negotiation and planning is listed in Table 9-10: Table 9-10 Logical Data Parameter

Cell Basic Informati on

TRX Informati on

Binding relation between the Issue 03 (2011-08-31)

Example Cell Index

5, 6

Cell Name

cell-11, cell-22

Freq. Band

DCS1800

MCC

460

MNC

164

Cell LAC

6

Cell CI

1, 2

Frequency 1

513, 517

Frequency 2

515, 519

OSP Code

163

TRX ID

9, 10, 11, 12

Frequency

513, 515, 517, 519

Is Main BCCH TRX

YES, NO, YES, NO

TRX ID

9, 10, 11, 12

TRX Board Pass No.

0, 1, 0, 1


Data Source

Network planning


Network planning

Network planning

Network planning

62


9 Configuring a BTS

Parameter logical TRX and the physical TRX board

Example RXU Index Type

RXUNAME

RXU Name

drfu0, drfu1, drfu0, drfu1

Data Source

The transmission data that requires negotiation and planning is listed in Table 9-11: Table 9-11 Transmission Data (IP over FE) Parameter

IP address of an Ethernet port

IP address and informati on of an Ethernet Port on a BTS

BTS IP

Issue 03 (2011-08-31)

Example Port No.

1

Subrack Number

0

Slot Number

19

Local IP address

166.101.121.220

Subnet mask

255.255.0.0

Port No.

0

Port Cabinet No.

0

Subrack No.

0

Slot No.

6

Physical IP

203.26.0.5

IP Mask

255.255.255.0

MTU

1500

BTS Communic ation Type

PORTIP

BTS IP

203.26.0.5

BSC IP

203.26.0.1

Data Source

Internal planning

Network planning

Internal planning

Network planning

Network planning


63


9 Configuring a BTS

Parameter BTS Equipme nt Serial Number

BTS Interface Board Bar Code 1 Adjacent Node ID

Adjacent Node

IP path

Example

Data Source

1000000000000000

Internal planning

0

Adjacent Node Name

BTS3900A_9

Adjacent Node Type

ABIS

Site Index

9

IP path ID

0

Interface Type

ABIS

IP path type

EF

Forward Bandwidth

1000

Backward Bandwidth

1000

Internal planning

Network planning

BTS clock data that requires negotiation and planning is listed in Table 9-12: Table 9-12 BTS Clock Parameter

Example Clock Protocol Type

BTS IP Clock Server

Issue 03 (2011-08-31)

Data Source

HW_DEFINED

Clock Reference Source Redundanc y

UNSUPPORT

Clock Server 0 IP Address

16.16.16.50

Clock Synchroniz ation Mode

CONSYN

Network planning


64


9 Configuring a BTS

The parameters of monitoring boards that require negotiation and planning are listed in Table 9-13: Table 9-13 Monitoring Boards Board Name

Cabinet Number

Subrack Number

Slot Number

Manager Port Number


PMU

0

7

0

1

3

TCU

0

8

0

1

7

TCU

2

8

0

0

6

TCU

3

8

0

1

23

TCU

4

8

0

1

24

FMU

1

11

0

0

14

GATM

0

50

0

0

22

GATM

0

51

0

1

22

BTS user-defined alarms that require negotiation and planning are listed in Table 9-14: Table 9-14 BTS User-Defined Alarm Alarm ID

Alarm Name

Alar m Seve rity

Event Type

Ca bi net No .

Su bra ck No .

Slo t No .

Port No.

Swit ch

Port Typ e

Alar m VO L

65033


Criti cal

env

0

8

0

0

OPE N

BOO L

HIG H

Example //Adding a BTS and a cabinet ADD BTS: BTSID=9, BTSNAME="BTS3900A_9", BTSTYPE=BTS3900A_GSM, BTSDESC="3900A", SEPERATEMODE=SUPPORT, SERVICEMODE=IP, SRANMODE=SUPPORT; ADD BTSCABINET: IDTYPE=BYID, BTSID=9, CN=0, SRANMODE=SUPPORT, ADD BTSCABINET: IDTYPE=BYID, BTSID=9, CN=2, SRANMODE=SUPPORT, ADD BTSCABINET: IDTYPE=BYID, BTSID=9, CN=3, SRANMODE=SUPPORT, CABINETDESC="IBBS"; ADD BTSCABINET: IDTYPE=BYID, BTSID=9, CN=4, SRANMODE=SUPPORT, CABINETDESC="IBBS";

Issue 03 (2011-08-31)


TYPE=APM30; TYPE=TMC; TYPE=BBC, TYPE=BBC,

65


9 Configuring a BTS

ADD BTSCABINET: IDTYPE=BYID, BTSID=9, CN=1, SRANMODE=SUPPORT, TYPE=RFC-6; //Adding a BTS board ADD BTSBRD: IDTYPE=BYID, ADD BTSBRD: IDTYPE=BYID, ADD BTSBRD: IDTYPE=BYID, ADD BTSBRD: IDTYPE=BYID, ADD BTSBRD: IDTYPE=BYID, ADD BTSBRD: IDTYPE=BYID, ADD BTSBRD: IDTYPE=BYID, ADD BTSBRD: IDTYPE=BYID, ADD BTSBRD: IDTYPE=BYID, ADD BTSBRD: IDTYPE=BYID, ADD BTSBRD: IDTYPE=BYID,

BTSID=9, BTSID=9, BTSID=9, BTSID=9, BTSID=9, BTSID=9, BTSID=9, BTSID=9, BTSID=9, BTSID=9, BTSID=9,

//Configuring parameters of SET BTSAPMUBP: IDTYPE=BYID, MPN=1, ADDR=3; SET BTSDHEUBP: IDTYPE=BYID, MPN=1, ADDR=7; SET BTSDHEUBP: IDTYPE=BYID, MPN=0, ADDR=6; SET BTSDHEUBP: IDTYPE=BYID, MPN=1, ADDR=23; SET BTSDHEUBP: IDTYPE=BYID, MPN=1, ADDR=24; SET BTSFMUABP: IDTYPE=BYID, MPN=0, ADDR=14; SET BTSDATUBP: IDTYPE=BYID, MPN=0, ADDR=22; SET BTSDATUBP: IDTYPE=BYID, MPN=1, ADDR=22;

CN=0, CN=0, CN=0, CN=0, CN=0, CN=0, CN=0, CN=2, CN=3, CN=4, CN=1,

SRN=7, SN=0, BT=PMU; SRN=7, SN=1, BT=PSU; SRN=7, SN=2, BT=PSU; SRN=7, SN=3, BT=PSU; SRN=8, SN=0, BT=TCU; SRN=50, SN=0, BT=GATM; SRN=51, SN=0, BT=GATM; SRN=8, SN=0, BT=TCU; SRN=8, SN=0, BT=TCU; SRN=8, SN=0, BT=TCU; SRN=11, SN=0, BT=FMU;

a DATU/DATM/GATM board BTSID=9, CN=0, SRN=7, SN=0, CFGFLAG=YES, BTSID=9, CN=0, SRN=8, SN=0, CFGFLAG=YES, BTSID=9, CN=2, SRN=8, SN=0, CFGFLAG=YES, BTSID=9, CN=3, SRN=8, SN=0, CFGFLAG=YES, BTSID=9, CN=4, SRN=8, SN=0, CFGFLAG=YES, BTSID=9, CN=1, SRN=11, SN=0, CFGFLAG=YES, BTSID=9, CN=0, SRN=50, SN=0, CFGFLAG=YES, BTSID=9, CN=0, SRN=51, SN=0, CFGFLAG=YES,

//Adding an RXU chain or ring ADD BTSRXUCHAIN: IDTYPE=BYID, BTSID=9, RCN=0, TT=CHAIN, HCN=0, HSRN=0, HSN=6, HPN=0; ADD BTSRXUBRD: IDTYPE=BYID, BTSID=9, BT=DRFU, CN=1, SRN=4, SN=0, RXUNAME="drfu0", RXUCHAINNO=0, RXUPOS=1; ADD BTSRXUBRD: IDTYPE=BYID, BTSID=9, BT=DRFU, CN=1, SRN=4, SN=1, RXUNAME="drfu1", RXUCHAINNO=0, RXUPOS=2; //Adding data to GSM internal cells ADD GCELL:CELLID=5,CELLNAME="cell-11", TYPE=DCS1800, MCC="460", MNC="164", LAC=6, CI=1; ADD GCELL:CELLID=6,CELLNAME="cell-22", TYPE=DCS1800, MCC="460", MNC="164", LAC=6, CI=2; ADD GCELLFREQ: IDTYPE=BYID,CELLID=5, FREQ1=513,FREQ2=515; ADD GCELLFREQ: IDTYPE=BYID,CELLID=6, FREQ1=517,FREQ2=519; // Adding the mapping between a cell and an originating signaling point (OSP) ADD GCELLOSPMAP: IDTYPE=BYID, CELLID=5, OPC=171; ADD GCELLOSPMAP: IDTYPE=BYID, CELLID=6, OPC=171; //Adding a TRX ADD GTRX: IDTYPE=BYID,CELLID=5,TRXID=9, FREQ=513,ISMAINBCCH=YES; ADD GTRX: IDTYPE=BYID,CELLID=5,TRXID=10, FREQ=515; ADD GTRX: IDTYPE=BYID,CELLID=6,TRXID=11, FREQ=517,ISMAINBCCH=YES; ADD GTRX: IDTYPE=BYID,CELLID=6,TRXID=12, FREQ=519; //Adding a cell to a BTS ADD CELLBIND2BTS: IDTYPE=BYID,CELLID=5,BTSID=9;

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9 Configuring a BTS

ADD CELLBIND2BTS: IDTYPE=BYID,CELLID=6,BTSID=9; //Adding binding between logic TRX and channel on TRX board ADD TRXBIND2PHYBRD: TRXID=9, TRXTP=DRFU, TRXPN=0, RXUIDTYPE=RXUNAME, RXUNAME=" drfu0"; ADD TRXBIND2PHYBRD: TRXID=10, TRXTP= DRFU, TRXPN=1, RXUIDTYPE=RXUNAME, RXUNAME=" drfu0"; ADD TRXBIND2PHYBRD: TRXID=11, TRXTP= DRFU, TRXPN=0, RXUIDTYPE=RXUNAME, RXUNAME=" drfu1"; ADD TRXBIND2PHYBRD: TRXID=12, TRXTP=DRFU, TRXPN=1, RXUIDTYPE=RXUNAME, RXUNAME=" drfu1"; //Configuring transmission data when the IP over FE/GE transmission mode is used ADD ETHIP:SRN=0, SN=19, PN=1, IPINDEX=0, IPADDR="166.101.121.220", MASK="255.255.0.0"; ADD BTSDEVIP: IDTYPE=BYID, BTSID=9, PN=0, CN=0, SRN=0, SN=6, IP="203.26.0.5", MASK="255.255.255.0"; SET BTSIP: IDTYPE=BYID, BTSID=9, BTSCOMTYPE=PORTIP, BTSIP="203.26.0.5", BSCIP="203.26.0.1"; SET BTSETHPORT: IDTYPE=BYID, BTSID=9, PN=0, CN=0, SRN=0, SN=6, MTU=1500; ADD BTSESN: IDTYPE=BYID, BTSID=9, MAINDEVTAB="1000000000000000"; ADD ADJNODE: ANI=0, NAME="BTS3900A_9", NODET=ABIS, BTSID=9; ADD IPPATH:ANI=0, PATHID=0, ITFT=ABIS, PATHT=EF, TXBW=100000, RXBW=100000, VLANFlAG=DISABLE, PATHCHK=DISABLED; //Setting parameters of the IP clock server SET BTSIPCLKPARA: IDTYPE=BYID, BTSID=9, CLKPRTTYPE=HW_DEFINED, ISCLKREDUCY=UNSUPPORT, MASTERIPADDR="16.16.16.50",SYNMODE=CONSYN; //Activating a BTS ACT BTS:IDTYPE=BYID, BTSID=9; //Setting the alarm port of the BTS environment alarms SET BTSENVALMPORT: IDTYPE=BYID, BTSID=9, CN=0, SRN=8, SN=0, PN=0, SW=OPEN, AID=65033, PT=BOOL, AVOL=LOW; SET ENVALMPARA: AID=65033, ANM="Ambient Temperature Abnormal", ALVL=Critical, ASS=env;

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10

10 Configuration Reference Information

Configuration Reference Information

About This Chapter This chapter describes the concepts, principles, rules, and conventions related to data configuration. 10.1 Data Configuration Principles for Equipment This section describes the configuration rules and reference information related to the BSC6900 equipment. 10.2 Data Configuration Principles for Interfaces This section describes the configuration rules and reference information related to the BSC6900 interfaces. 10.3 Configuration Guidelines for the GBTS This section describes the configuration rules and reference information related to a base station. 10.4 Data Configuration Guidelines for Specifications This document describes the specifications of the BSC6900.

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10.1 Data Configuration Principles for Equipment This section describes the configuration rules and reference information related to the BSC6900 equipment.

10.1.1 Configuration Rules of the Cabinets This section describes the configuration rules for the BSC6900 cabinets. The configuration rules of the BSC6900 cabinets are as follows: l

The cabinets consist of the Main Processing Rack (MPR), Extended Processing Rack (EPR), and TransCoder Rack (TCR).

l

The MPR is configured by default. You cannot add or remove this cabinet by running the MML command.

l

If a TCS is configured in the local cabinet, the remote TCR cannot be configured.

l

According to service requirements, one to three cabinets can be configured. The number of remote TCRs cannot exceed two.

10.1.2 Configuration Rules of the Subracks This section describes the configuration rules and reference information related to the BSC6900 subracks. The configuration rules of the BSC6900 subracks are as follows: l

The Main Processing Subrack (MPS) is configured by default. You do not need to add this subrack by running the MML command.

l

Before adding a subrack, ensure that the cabinet to which the subrack is added exists, and that the MPS works properly.

l

Each subrack needs to be equipped with a fan box. The power distribution box can be configured as required. Generally, only one subrack in a cabinet can be connected to the monitoring board of the power distribution box.

l

The actual board type in a subrack must be consistent with the configured type. The subrack number of the EPS/TCS must be consistent with the setting of the DIP switch.

l

After a subrack is added, run the MML command to enable the corresponding port on the SCU board in the MPS.

l

The relationship between Subrack No. and Cabinet No. is determined as follows: Cabinet No. equals the quotient of Subrack No. divided by three.

10.1.3 Configuration Rules of the Boards This section describes the configuration rules and reference information related to the BSC6900 boards.

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Table 10-1 Board classification Board Class

Board Type

Logical Function Type

Interface board

PEUa

IP FR HDLC Abis_IP

EIUa/OIUa

Abis_TDM Ater_TDM A_TDM Pb_TDM

POUc

TDM IP

FG2a

IP GbIP

Data Processing Unit (DPU)

GOUa/GOUc/FG2c

IP

DPUa/DPUc/DPUf

GTC

DPUb

GTC GPCU

Signaling Processing Unit (XPU)

DPUd/DPUg

GPCU

XPUa/XPUb

GCP RGCP MCP

TDM switching Network Unit (TNU)

TNUa

TDM_Switching

Operation and Maintenance Unit (OMU)

OMUa/OMUb/OMUc

OAM

Service Aware Unit (SAU)

SAUa/SAUc

SAU

Functions of boards The BSC6900 boards provide different functions when being loaded with different software, as described in Table 10-2.

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Table 10-2 Functions of boards

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Logical Function Type

Description

OAM

Operation and maintenance management

TDM_Switching

TDM switching

GCP

All the subsystems are configured as CPU for Service (CPUS) subsystems, which are used to process the services in the control plane of the GSM BSC.

RGCP

Subsystem 0 is configured as the MPU subsystem, which is used to manage resources. All the other subsystems are configured as CPUS subsystems, which are used to process the services in the control plane of the GSM BSC.

MCP

Interference-based channel allocation

GTC

GSM speech service processing

GPCU

GSM packet service processing

IP

IP interface processing

FR

FR interface processing

HDLC

HDLC interface processing

TDM

TDM interface processing

GbIP

GbIP interface processing

Abis_TDM

TDM-based Abis interface processing

Ater_TDM

TDM-based Ater interface processing

Pb_TDM

TDM-based Pb interface processing

A_TDM

TDM-based A interface processing

Abis_IP

IP-based Abis interface processing

SAU

Service aware unit


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NOTE

l It is recommended that the services of the boards in each subrack be controlled by the MPU subsystem in the same subrack to avoid a large data flow transmitted between subracks. l At least one XPUb board out of every three pairs of XPUb boards must be of the RGCP type. It is recommended that you configure one XPUb board of the RGCP type out of every two pairs of XXPUb boards. l It is recommended that service processing boards and interface boards be evenly distributed in each subrack to reduce data exchanging between subracks. l It is recommended that interface boards, XPU boards, and DPU boards be evenly distributed in each subrack.

10.1.4 Configuration Rules of the Clock This section describes the configuration rules and reference information related to the BSC6900 clock. The configuration rules of the board clock are as follows: l

The interface boards in the EPS cannot provide 8 kHz clock output through the backplane.

l

Each channel of 8 kHz backplane clock has only one clock source. The clock output switch on multiple interface boards for the same channel of 8 kHz backplane clock cannot be turned on at the same time.

l

If both data and voice services are carried by the board, the clock source for the two types of services must be the same in the core network. Otherwise, the data or voice service may fail.

l

For the EIUa boards, the LINE1 clock is extracted from Port for LINE1, and the LINE2 clock is extracted from Port for LINE2. For other interface boards, both the LINE1 clock and LINE2 clock are extracted from Port for LINE.

l

If Use SGSN clock source is set to YES, the POUc board can be used only as a Gb interface board rather than an Abis, Ater, Pb, or A interface board.

The configuration rules of the system clock are as follows: l

Clock source priority ranges from 1 to 4. The clock source of priority 0 is configured by default. Priority 0 is the lowest priority. The descending ranking of priorities is 1, 2, 3, and 4.

l

Clock source type should be set according to the mode of obtaining the clock signals. – If the clock signals are extracted from the CN by the interface board (for example, OIUa/ EIUa/PEUa) in the EPS and then sent to the GCUa/GCGa board through the line clock signal cable, Clock source type should be set to BITS1-2MHZ or BITS2-2MHZ. – If the clock signals are extracted from the CN by the interface board in the MPS and then sent to the GCUa/GCGa board through the backplane of the MPS, Clock source type should be set to LINE1_8KHZ or LINE2_8KHZ. – If the clock signals are provided by the external BITS, Clock source type should be set to BITS1-2MBPS, BITS2-2MBPS, BITS1-1.5MBPS, or BITS2-1.5MBPS. – If the clock signals are provided by the GPS and then sent to the GCGa board, Clock source type should be set to GPS. – If the clock signals are provided by the external 8 kHz clock, Clock source type should be set to 8KHZ.

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10.1.5 Introduction to Time Synchronization The time synchronization function enables the time synchronization of the nodes of the GBSS system. Synchronization is critical for identifying faults. For example, if an E1 link between the BSC6900 and the base station is broken, time synchronization between the BSC6900 and the base station ensures that the same fault is reported to the M2000 by the BSC6900 and by the base station at the same time point. The Simple Network Time Protocol (SNTP) is used to synchronize the time of the nodes of the GBSS system. SNTP serves the time synchronization between a server and multiple clients. Therefore, an SNTP server must be configured in the GBSS system. The SNTP server broadcasts time synchronization information to the SNTP clients. Either the BSC6900 or the M2000 functions as an SNTP server. You can configure an SNTP server by taking the field condition into consideration. SNTP works on Greenwich Mean Time (GMT). Therefore, when setting the time at different nodes, you need to set the time zone where the node is located and decide whether to set Daylight Saving Time (DST). If DST is set, you need to configure the start date/time and end date/time of DST and the time offset.

10.2 Data Configuration Principles for Interfaces This section describes the configuration rules and reference information related to the BSC6900 interfaces.

10.2.1 Data Configuration Principles for the A Interface The A interface is a standard interface between the BSS and the MSC. It supports 64 kbit/s signaling channels and traffic channels.

Layered Model of the A interface protocol This section describes the protocol structure for the A interface. Physically, the A interface provides trunk circuits and ports for connecting the BSS to the MSC. Figure 10-1 shows the protocol structure for A interface signaling. Figure 10-1 Protocol structure for A interface signaling

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NOTE

l BSSAP: Base Station Subsystem Application Part l DTAP: Direct Transfer Application Part l BSSMAP: Base Station Subsystem Management Application Part l SCCP: Signaling Connection Control Part l MTP: Message Transfer Part

Physical layer The physical layer of the A interface can use a 2 Mbit/s 120-ohm twisted pair cable or 75-ohm coaxial cable. The physical layer of the A interface has the following characteristics: l

The 2 Mbit/s transmission rate complies with ITU-T G.703.

l

Frame structure, synchronization, and timing comply with ITU-T G.705.

l

Fault management complies with ITU-T G.732.

l

Cyclic redundancy check 4 (CRC4) complies with ITU-T G.704.

MTP The main function of Message Transfer Part (MTP) is to ensure reliable signaling transfer in the signaling network. In the case of system and signaling network failures, MTP takes measures to avoid or reduce packet loss, duplication, and disorder. MTP comprises three functional levels: signaling data link, signaling link, and signaling network. MTP complies with ITU-T Q.701 through ITU-T Q.710.

Signaling Data Link Functional Level (Level 1) Signaling data link functional level (level 1) is used for signaling transmission. It consists of two channels that have the same data rate but transmit signaling in opposite directions. A semipermanent connection is established between BSS signaling processing equipment and digital trunk equipment through a digital switching network. It occupies a 64 kbit/s Pulse Code Modulation (PCM) timeslot for signaling transmission. The digital trunk equipment actually implements the level 1 function of MTP. The advantage of a semi-permanent connection is that any timeslot (except the synchronous timeslot) can be used as a signaling data link, which can be configured by running an MML command.

Signaling Link Functional Level (Level 2) Signaling link functional level (level 2) defines the functions and procedures for sending signaling to signaling data links. In combination with level 1, this level guarantees reliable signaling transfer between two directly connected signaling points. Level 2 functions consist of signaling-unit delimitation, signaling-unit alignment, error detection, error correction, initial alignment, processor fault, level2 flow control, and error-rate monitoring. These functions are performed by signaling processing equipment of the BSS. Error control methods of signaling processing equipment can be set on the OMC. The basic error correction method is applicable to international signaling links with unidirectional transmission delay less than 15 ms and to terrestrial signaling links. The preventive cyclic retransmission mode is applicable to international signaling links with unidirectional transmission delay greater than or equal to 15 ms and to all satellite signaling links. Issue 03 (2011-08-31)


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Signaling Network Functional Level (Level 3) Signaling network functional level (level 3) defines the functions of and procedures for transferring management messages between signaling points. It guarantees reliable signaling transfer when signaling links or signaling transfer points in the signaling network fail. Signaling network functions are signaling message processing and signaling network management. l

Signaling message processing The signaling message processing part sends signaling messages to the corresponding signaling links or user parts (such as TUP, ISUP and SCCP) according to message flags. Signaling message processing involves message routing, message discrimination, and message distribution, as shown in Figure 10-2. Figure 10-2 Signaling message processing flowchart

– Message routing The message routing part selects a route (signaling link) for transmitting a signaling message to its destination (DSP) according to the Destination Point Code (DPC) and Signaling Link Selection (SLS) in the route flag. – Message discrimination The message discrimination part receives a message from level 2 and then decides whether the destination of the messages is the local signaling point. If the destination is the local signaling point, the message discrimination part will send the message to the message distribution part. Otherwise, the message discrimination part will send the message to the message routing part. – Message distribution The message distribution part allocates messages received from the message discrimination part to the user part, signaling network management part, and test and maintenance part. l

Signaling network management Signaling network management reconstructs a signaling network and resumes normal signaling transfer when the signaling network fails. Signaling network management

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comprises signaling traffic management, signaling link management and signaling route management. – Signaling traffic management Signaling Traffic Management (STM) switches a signaling flow from one link or route to one or more available links or routes when the signaling network fails. It also reduces signaling traffic temporarily when a signaling point is congested. – Signaling link management Signaling link management restores, establishes, and releases signaling links in the signaling network, and ensures provision of certain pre-determined link groups. Connections between signaling data links and signaling terminals are generally established by running MML commands. These connections cannot be changed by operations performed in the signaling system. – Signaling route management Signaling route management ensures reliable exchange of information about whether signaling routes are available between signaling points, so that signaling routes can be blocked or unblocked when necessary. It mainly comprises procedures such as transfer prohibited, transfer allowed, controlled transfer, restricted transfer, signaling route group test, and signaling route group congestion test.

SCCP Signaling Connection and Control Part (SCCP) is designed to provide complete network-layer functions with the help of MTP level 3. According to the OSI model, the network layer provides connectionless services and connection-oriented services. SCCP complies with ITU-T Q.711 through ITU-T Q.716.

SCCP Functions SCCP application enables: l

Interconnection between signaling networks

l

New services and functions in mobile communications networks, intelligent networks, and intelligent management

l

Integrated Services Digital Network (ISDN) supplementary services

l

Data transfer between network management centers

In general, SCCP provides reliable services for any information exchange based on MTP. SCCP not only provides network services but also performs functions of routing and network management. The SCCP routing function mainly performs addressing with such information as Destination Point Code (DPC), Subsystem Number (SSN), and Global Title (GT). The SCCP network management function mainly manages the signaling point state and subsystem state, switches over active/standby subsystems, broadcasts state information, and tests the subsystem state.

SCCP Services SCCP services can be classified into basic connectionless services (class 0), in-sequence delivery connectionless services (class 1), basic connection-oriented services (class 2), and flow control connection-oriented services (class 3). Classes 0 and 1 are connectionless service, whereas classes 2 and 3 are connection-oriented services. The classes of SCCP services are described as follows: Issue 03 (2011-08-31)


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l


Connectionless service In connectionless service, users do not establish signaling connection before data transfer, but instead use the routing functions of SCCP and MTP to transfer data directly in the signaling network. This flexible and simple service is applicable to the transfer of a small amount of data. Class 0 service does not guarantee sequential transfer of messages. Class 1 service guarantees sequential transfer of messages by using Signaling Link Selection (SLS) and MTP. Connectionless services transmit user data by adopting the Unit Data (UDT) message and Enhanced Unit Data (XUDT) message. UDT messages do not have data segmentation or reassembly capabilities and carry only a small amount of user data. XUDT messages have data segmentation and reassembly capabilities and carry up to 2 KB of user data.

l

Connection-oriented service Connection-oriented services require establishment of a signaling connection (virtual connection) in acknowledged mode between the originating point and the destination point before signaling transfer. In this case, data is transmitted through the established signaling connection instead of by using the SCCP routing function. When data transfer finishes, users need to release the signaling connection. This class of service is applicable to the transfer of a large amount of data because the destination has acknowledged the capability of receiving data. This avoids invalid transmission of a large amount of data. In addition, the pre-established connection enables subsequent data to be transmitted without SCCP routing, reducing data-transfer delay.

SCCP Routing Control SCCP routing control performs routing and addressing according to SCCP address information. The following types of address information can be found in SCCP: l

DPC

l

DPC + SSN or GT (or both)

l

GT+ (SSN)

The Destination Point Code (DPC) is used by MTP in addressing. The Subsystem Number (SSN) is used to identify different SCCP users in the same node, such as ISUP, MAP, TCAP, and BSSAP. MTP supports only a small number of users, whereas SCCP enables the addressing range to be expanded to meet the requirements of future new services. Global Titles (GTs) are dialing numbers, such as international and national telephone numbers, ISDN numbers, and E.214 numbers specific to GSM. They do not directly represent routing information in the signaling network. The routing information can be obtained through GT translation. Different from DPCs, GTs are valid globally. The addressing range of GTs is far larger than that of DPC. GTs enable the transfer of information irrelevant to circuits between any two signaling points worldwide. The powerful addressing capability of GTs is an important characteristic of SCCP.

SCCP Management SCCP management (SCMG) ensures normal network operation by re-routing or adjusting traffic in case of network failure or congestion. This function is implemented by transferring SCCP management messages and primitives. The management messages adopt class-0 UDT. SCCP management consists of signaling point management, subsystem management, active/standby subsystem switchover, state information broadcast, and faulty subsystem state testing. Issue 03 (2011-08-31)


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BSSAP The Base Station Subsystem Application Part (BSSAP) is an A interface specification. It describes two types of messages: BSSMAP messages and Direct Transfer Application Part (DTAP) messages. BSSAP messages are responsible for traffic flow control and need to be processed by the internal functional module of the A interface. In DTAP messages, the A interface functions as a transmission channel. DTAP messages are directly transmitted to a radio channel on the BSS side and to the corresponding functional processing unit on the Network SubSystem (NSS) side. BSSAP protocols are defined in ETSI GSM 08.08 and ETSI GSM 04.08.

Typical Message Contents l

DTAP messages According to the functional units of the NSS that processes DTAP messages, DTAP messages can be classified into Mobile Management (MM) messages and Call Control (CC) messages. MM messages include authentication, CM service request, identification request, IMSI detach, location update, MM state, and TMSI re-allocation messages. CC messages include alerting, call proceeding, connection, setup, modification, release, disconnection, notification, state query, and DTMF startup messages.

l

BSSMAP messages BSSMAP messages can be classified into connectionless and connection-oriented messages. – Connectionless messages include block/unblock, handover, resource, reset, and paging messages. Block/unblock messages include block, block ACK, unblock, and unblock ACK messages. Circuit group block/unblock messages include circuit group block, circuit group block ACK, circuit group unblock, and circuit group unblock ACK messages. Handover messages include handover candidate enquiry and handover candidate enquiry response messages. Resource messages include resource request and resource indication messages. Reset messages include reset and reset ACK messages. – Connection-oriented messages include assignment, handover, clear, and cipher messages. Assignment messages include assignment request, assignment completion, and assignment failure messages. Handover messages include handover request, handover request ACK, handover command, handover completion, and handover failure messages. Clear messages include clear request, clear command, and clear completion messages. Cipher messages include cipher mode command and cipher mode completion messages.

BSSAP Protocol Functionality BSSAP performs its functions by using connection-oriented and connectionless SCCP services. When an MS needs to exchange messages with the network side but there is no SCCP connection for the MS between the MSC and the BSS, a new connection is established. External handovers also require a new connection. A connection needs to be established in either of the following conditions: Issue 03 (2011-08-31)


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l

When an MS sends an Access Request message on the RACH, the BSS allocates a dedicated radio resource (DCCH or TCH) to the MS. After a layer 2 connection is set up on the SDCCH (or FACCH) where resources are allocated, the BSS starts to set up the connection.

l

When an MSC decides to perform an external handover (the target BSS may be the source BSS), it must reserve a new DCCH or TCH from the target BSS. In this scenario, the MSC starts to set up the connection.

BSSAP implements the functions described in Table 10-3 by using connection-oriented or connectionless messages. Table 10-3 BSSAP functions

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Function

Description

Assignment

Assignment ensures that dedicated radio resources are properly allocated or re-allocated to an MS. The initial MS random access and immediate assignment to a DCCH is processed automatically by the BSS but not controlled by the MSC.

Block/Unblock

During an assignment procedure, the MSC selects an available terrestrial circuit. If this circuit is no longer available, the BSS instructs the MSC to block/unblock the circuit.

Resource Indication

Resource indication notifies the MSC of the number of idle radio resources that can be used as traffic channels and the total number of available radio resources (idle or have already been occupied). The MSC cannot get these radio resource numbers from the MSCcontrolled services. However, the MSC must obtain the numbers before it decides an external handover.

Reset

Reset initializes the faulty BSS or MSC. For example, if the BSS becomes faulty or loses all reference information for service processing, the BSS sends a reset message to the MSC, instructing the MSC to release the affected calls, delete the affected reference information, and set all circuits related to the BSS to idle. If the MSC or BSS is only partially faulty, the affected parts can be cleared using the clear procedure.


79



Function

Description

Handover Request

In any of the following conditions, the BSS may send a Handover Request message to the MSC to request a handover of the MS to which dedicated resources have been allocated: l The BSS detects a radio cause for handover. l The MSC starts a handover candidate enquiry procedure and an MS is waiting for a handover. l Due to congestion, the serving cell needs to be changed during call setup, for example, through a directed retry. The BSS resends a handover request message at intervals until one of the following situations occurs: l The BSS receives a Handover Command message from the MSC. l The BSS receives a Reset message. l All communications with the MS are interrupted and the processing is aborted. l Processing is complete, for example, a call is cleared.

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Handover Resource Allocation

Handover Resource Allocation enables the MSC to request resources from the target BSS based on the handover request. The target BSS will reserve resources and wait for an MS to access this channel.

Handover Procedure

In a handover procedure, the MSC instructs an MS to access the radio resources of another cell. When the handover is performed, the original dedicated radio resources and terrestrial resources are maintained until the MSC sends a Clear Command message or a reset occurs.

Release of Radio Resources and Terrestrial Resources

When processing finishes, the MSC sends a Clear Command message to the BSS. After receiving the message, the BSS starts a Clear procedure on the air interface, sets the configured terrestrial circuit to idle, and returns a clear completion message to the MSC. The MSC then releases the terrestrial resources at the local end. If resources need to be released by the BSS, the BSS sends a Clear Request message to the MSC, requesting the MSC to start a release procedure to release the terrestrial and radio resources concerning the MSC and BSS.

Paging

The paging to MS is transmitted by using the SCCP connectionless services of BSSMAP. After the BSS receives a Paging Response message from the air interface, it establishes an SCCP connection to the MSC. The paging response message, which is contained in the BSSMAP Full L3 Message, is transmitted to the MSC through the SCCP connection.

Flow Control

Flow control prevents network entities from receiving too much traffic so that the traffic volume is balanced. Flow control on the A interface controls the traffic at the traffic source. It is classified into five levels and can be implemented based on subscriber classes.


80



Function

Description

Classmark Update

Classmark update notifies a receiving entity of classmark messages received from an MS. Generally, the BSS notifies the MSC of a classmark message from an MS. After a handover finishes, the MSC sends the corresponding MS classmark message to the new BSS over the A interface.

Cipher Mode Control

The Cipher Mode Control procedure allows the MSC to transmit the cipher mode control message to the BSS and start the subscriber equipment and signaling cipher equipment with a correct Kc.

Queuing Indication

This procedure notifies the MSC that the BSS will delay the allocation of necessary radio resources. This procedure is valid only when the queuing function is introduced for traffic channel assignment and traffic channel handover in the BSS.

Load Indication

Load indication notifies all the neighboring BSSs of the load status of a cell so that all handovers in an MSC are under control. In a certain validity period, the neighboring BSSs will consider the load status of neighboring cells during handovers.

A interface circuit resource management Terrestrial channel management between the BSS and the MSC keeps the states of terrestrial circuits at both ends consistent. This ensures that a proper circuit can be found for a call or handover. Procedures involved in A interface circuit resource management are Circuit Block/ Unblock, Circuit Group Block/Unblock, Unequipped Circuit, and Reset Circuit.

Circuit Control Principles The general principles of circuit control are as follows: l

Circuit management messages, except Reset Circuit messages, are initiated by the BSC.

l

The MSC can block/unblock only the local circuits without affecting the circuit states on the BSS side.

l

The BSS cannot change the circuit states on the MSC side. For example, if a circuit is blocked on the MSC maintenance console, the BSS is not allowed to unblock or reset the circuit.

Circuit Block A circuit block procedure blocks circuits on both the BSS and MSC sides. This procedure can be initiated on the BSC maintenance console. It can also be initiated when a circuit is assigned, a handover is performed, or a device becomes faulty. This procedure can be used in GSM Phase I and Phase II. Figure 10-3 shows the circuit block procedure.

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Figure 10-3 Circuit block procedure

If the BSC does not receive a Block acknowledge message within a certain period of time, it retransmits the Block circuit message to the MSC. The circuit on the BSC side is still in the blocked state even if the BSC does not receive a Block acknowledge message from the MSC. When the BSC sends a Block circuit message to the MSC, the BSC generates an alarm. Circuit block does not affect circuits in service. Therefore, busy circuits will not be blocked until communication finishes.

Circuit Unblock A Circuit Unblock procedure unblocks circuits blocked by the BSC. This procedure can be initiated on the BSC maintenance console. Circuit unblock can be used in GSM Phase I and Phase II. Figure 10-4 shows the circuit unblock procedure. Figure 10-4 Circuit unblock procedure

If the BSC does not receive an Unblock acknowledged message before the associated timer expires, it retransmits an Unblock circuit message to the MSC. The circuit on the BSC side is still idle even if the BSC does not receive an Unblock acknowledged message from the MSC. When the BSC sends an Unblock circuit message to the MSC, the BSC generates an alarm.

Circuit Group Block A Circuit Group Block procedure blocks multiple A-interface circuits at one time. This procedure can be initiated on the BSC maintenance console or by trunk equipment itself. Circuit Group Block can be used only in GSM Phase II. Figure 10-5 shows the circuit group block procedure.

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Figure 10-5 Circuit group block procedure

If the BSC does not receive a Group block acknowledged message before the associated timer expires, it retransmits a Group block message to the MSC. The circuits on the BSC side are still blocked even if the BSC does not receive a Group block acknowledged message from the MSC. When the BSC sends a Group block message to the MSC, the BSC generates an alarm. Circuit group block does not affect circuits in service. Therefore, busy circuits will not be blocked until communication finishes.

Circuit Group Unblock A Circuit Group Unblock procedure unblocks multiple A-interface circuits simultaneously. This procedure can be initiated on the BSC maintenance console or by trunk equipment itself. Circuit Group Unblock can be used only in GSM Phase II. Figure 10-6 shows the circuit group unblock procedure. Figure 10-6 Circuit group unblock procedure

If the BSC does not receive a Group unblock acknowledged message before the associated timer expires, it retransmits a Group unblock message to the MSC. The circuits on the BSC side are still idle even if the BSC does not receive a Group unblock acknowledged message from the MSC. When the BSC sends a Group unblock message to the MSC, the BSC generates an alarm.

Unequipped Circuit An Unequipped Circuit procedure is used by the BSC or MSC to inform the peer end that a circuit does not exist and cannot be used. This procedure can be initiated during any procedures related to circuits. When the BSC or MSC receives a message indicating that a circuit is Issue 03 (2011-08-31)


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unequipped, an Unequipped Circuit procedure is initiated. Unequipped Circuit can be used only in GSM Phase II. Figure 10-7 shows the unequipped circuit procedure. Figure 10-7 Unequipped circuit procedure

An unequipped circuit message will be sent only once. When the BSC or MSC sends an Unequipped Circuit message, an alarm will be generated.

Circuit Reset A Circuit Reset procedure recovers the system resource information of the MSC and BSC when a fault (for example, abnormal release of an SCCP connection) affects only a few network elements. Figure 10-8 shows the circuit reset procedure. Figure 10-8 Circuit reset procedure

Figure 10-8 shows a circuit reset procedure initiated by the BSC. When the MSC receives a Reset circuit message, it clears the calls carried by the circuit and sets the circuit state to idle. The MSC, then, returns the Reset circuit acknowledged message to the BSC. A circuit reset procedure initiated by the MSC is similar to that in the preceding figure. The only difference lies in the transmission direction of the messages. If the BSC does not receive a Reset circuit acknowledged message before the associated timer expires, it retransmits the Reset circuit message. The retransmission times can be set through software. The circuit on the BSC side is still idle even if the BSC does not receive a Reset circuit acknowledged message from the MSC. When the BSC sends a Reset circuit message to the MSC, the BSC generates an alarm. A similar procedure is performed on the MSC side. Circuit Reset can also be initiated on the BSC maintenance console for maintenance and testing. Issue 03 (2011-08-31)


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A-interface radio resources management A interface radio resource management mainly involves resource indication and resource clearing procedures.

Resource Indication A resource indication procedure notifies the MSC of the number of idle radio resources that can be used as traffic channels and the total number of available radio resources (can be allocated or have already been allocated) in the BSS. The MSC may consider the radio resource information when deciding an external handover. Figure 10-9 shows the resource indication procedure. Figure 10-9 Resource indication procedure

There are four types of resource indications: automatic indication, single indication, periodical indication, and no indication. No indication is the default mode. l

In automatic indication mode, the BSS continuously sends Resource Indication messages to the MSC at the interval specified in the Resource Indication Request message when the relevant cell meets the conditions predefined at the OMC.

l

In single indication mode, the BSS immediately returns a Resource Indication message about the relevant cell to the MSC.

l

In periodical indication mode, the BSS continuously sends Resource Indication messages to the MSC at the interval specified in the Resource Indication Request message, until it receives a new Resource Request or Reset message. The interval is set at the MSC with the unit 100 ms.

l

In no indication mode, the BSS immediately returns a single Resource Indication message without any resource information, and the procedure is finished.

For each idle channel, the BSS calculates the average interference level within a period. Based on the average interference level, five interference bands are classified for idle channels. The Resource Indication information element contains two types of information about each interference band: number of idle half-rate traffic channels and number of idle full-rate traffic channels in the interference band.

Resource Clearing A resource clearing procedure releases all relevant terrestrial circuit resources and radio resources. It can be initiated by the MSC or by the BSS. Issue 03 (2011-08-31)


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Figure 10-10 shows the resource clearing procedure initiated by the MSC. Figure 10-10 Resource clearing procedure initiated by the MSC

Figure 10-11 shows the resource clearing procedure initiated by the BSS. Figure 10-11 Resource clearing procedure initiated by the BSS

Other A-interface management procedures Other management procedures on the A interface are classmark update, reset, flow control, queuing, error handling, SCCP link control, and load indication.

Classmark Update A classmark update procedure notifies the MSC of a classmark message received from an MS. This procedure is initiated when the power classmark of a dedicated resource occupied by an MS changes. Figure 10-12 shows the classmark update procedure.

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Figure 10-12 Classmark update procedure

Reset A reset procedure initializes a faulty BSC or MSC so that all resources can be released. When the BSC is reset, it releases all resources and sends a Reset message to the MSC. After receiving the Reset message, the MSC releases all calls and connection resources and sets all circuits associated with the BSC to idle. When timer T2 expires, the MSC returns a Reset acknowledged message to the BSC, indicating that the reset is successful. Figure 10-13 shows the BSC reset procedure. Figure 10-13 BSC reset procedure

When the MSC is reset, it releases all resources and sends a Reset message to the BSC. After receiving the Reset message, the BSC releases all calls and connection resources. When timer T13 expires, the BSC returns a Reset acknowledged message to the MSC, indicating that the reset is successful. Figure 10-14 shows the MSC reset procedure.

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Figure 10-14 MSC reset procedure

Flow Control Flow control on the BSC side controls traffic flow from MSs when the MSC is overloaded, preventing system malfunction or congestion. This enables the traffic flow of calls to be controlled within a reasonable range. When the MSC is overloaded, the MSC sends an Overload message to the BSC, instructing the BSC to control the traffic flow. The flow control algorithm complies with GSM specifications. It adopts a dynamic sliding window, which is started when the MSC is overloaded. The size of the window can be modified to control the traffic according to the amount of traffic. This window is invalid once the MSC is no longer overloaded. Figure 10-15 shows the flow control procedure. Figure 10-15 Flow control procedure

NOTE

When the BSC is overloaded, it sends an Overload message to the MSC. Then, the MSC performs flow control. The BSC also takes flow control measures.

Load Indication A load indication procedure informs neighboring BSSs of the load conditions of a cell. This procedure is used to control handovers. After the MSC receives a Load Indication message, it forwards the information to the BSS. The BSS considers the load conditions in subsequent handovers. Issue 03 (2011-08-31)


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SCCP Link Control When an SS7 link is abnormally disconnected, transmission of control messages over the A interface is stopped through software. When the SS7 link recovers, control messages are sent again over the A interface. If an SS7 link is disconnected for a long time, a resource clearing procedure is initiated as soon as the link is recovered. This prevents resource deadlock.

Error Handling As errors may occur on transmission links, messages received may not be understandable. Therefore, erroneous messages are omitted and "confusion" messages (these messages are used in GSM Phase II) are selectively sent over the A interface.

10.2.2 Data Configuration Principles for the Ater Interface The Ater interface connects an MPS or EPS to a TCS.

Links on the Ater Interface This section describes the configuration rules and reference information related to the A and Ater interface links. In BM/TC separated mode, the TCS can be configured locally or remotely. Accordingly, links need to be configured on the A and Ater interfaces. Table 10-4 lists the links that need to be configured on the A and Ater interfaces. Table 10-4 Links on the A and Ater interfaces Interface

TCS Configured Locally

TCS Configured Remotely

A interface

SS7 link

SS7 link

Ater interface

-

Ater OML and Ater signaling link

Figure 10-16 shows the links that need to be configured on the A and Ater interfaces when the TCS is configured locally. The MPS communicates with the main TCS through the SCU boards to transmit SS7 signaling, BSC6900 internal signaling, and OM information. The SS7 signaling is transparently transmitted to the XPU board in the MPS/EPS through the SCU board.

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Figure 10-16 Links on the A and Ater interfaces (TCS configured locally)

Figure 10-17 shows the links that need to be configured on the A and Ater interfaces when the TCS is configured remotely. The SS7 signaling is transparently transmitted to the EIUa or XPUa board in the MPS/EPS for processing through the Ater interface. Figure 10-17 Links on the A and Ater interfaces (TCS configured remotely)

The configuration rules of the signaling links on the Ater interface are as follows: l Issue 03 (2011-08-31)

Each subrack needs to be configured with at least four Ater signaling links. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

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l

Two 64 kbit/s Ater signaling links are configured for the 512 CICs.

l

If the number of Ater signaling links calculated according to the second rule is less than four Ater signaling links per subrack, then follow the first configuration rule. If the number of Ater signaling links calculated is greater than four Ater signaling links per subrack, configure the actual number of Ater signaling links.

Timeslot Assignment on the Ater Interface This section describes the timeslot assignment principles of the Ater OMLs and signaling links and the dynamic assignment principles of traffic timeslots.

OM Timeslots and Signaling Timeslots on the Ater Interface In BM/TC separated mode, the data related to the Ater interface needs to be configured. When the TCS is configured locally, the SS7 signaling that is transparently transmitted over the Ater interface occupies the timeslots on the Ater interface. The occupied bandwidth is the same as that on the A interface. When the TCS is configured remotely, the Ater OMLs, Ater signaling links, and transparently transmitted SS7 signaling occupy the timeslots on the Ater interface. The bandwidth occupied by the SS7 signaling on the Ater interface is the same as that on the A interface. The timeslot bandwidth occupied by the Ater OMLs and Ater signaling links is subject to the BSC6900 configuration. Table 10-5 lists the bandwidth of OM timeslots and signaling timeslots on the Ater interface. Table 10-5 Bandwidth of OM timeslots and signaling timeslots on the Ater interface

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Typical Configuration

Bandwidth of Ater OMLs

Bandwidth of Ater Signaling Links

MPS+TCS

16 timeslots of 64 kbit/s

The MPS is configured with four timeslots of 64 kbit/s.

MPS+EPS+2TCS


Each BM subrack is configured with four timeslots of 64 kbit/s.

MPS+2EPS+3TCS



MPS+3EPS+4TCS



MPS+EPS+TCS



MPS+3EPS+2TCS


Each BM subrack is configured with eight timeslots of 64 kbit/s.


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Traffic Timeslots on the Ater Interface The traffic timeslots on the Ater interface are assigned dynamically. Except for the timeslots occupied by the OMLs and signaling links, all the other timeslots on the Ater interface are traffic timeslots, which form a resource pool. The unit of the resources in the resource pool is 16 kbit/s sub-timeslot. All the idle sub-timeslots form an FIFO queue. If required, the sub-timeslots will be taken out of the queue. For example, to establish a call, the EIUa board in the TCS selects a 16 kbit/s sub-timeslot (head element of the FIFO queue) that is not used for the longest time from the resource pool and uses it as the Ater path for the call. When the call is terminated, the sub-timeslot is released to the resource pool and is added to the tail of the FIFO queue.

10.2.3 Data Configuration Principles for the Gb Interface The Gb interface is the standard open interface between the BSS and the SGSN. Through this interface, the SGSN communicates with the BSS to implement functions such as packet data transfer, flow control, and mobility management. The location of the Gb interface in a GPRS system is similar to the location of the A interface between the BSS and the MSC in a GSM system. Their main difference is that the Gb interface is used to provide packet switched services.

Layered Model of the Gb interface protocol This section describes the protocol structure for the Gb interface. Figure 10-18 shows the protocol structure for Gb interface signaling. Figure 10-18 Protocol structure for Gb interface signaling

NOTE

l The physical layer (layer 1) of the Gb interface, based on the Frame Relay (FR) protocol, can be implemented through point-to-point frame relay connections or multipoint-to-multipoint frame relay network connections. l The Network Service (NS) layer (layer 2) of the Gb interface transmits Service Data Units (SDUs) on the Gb interface, configures NS Virtual Connections (VCs), and manages the NS VC state. l The Base Station Subsystem GPRS Protocol (BSSGP) layer (layer 3) of the Gb interface performs operation and maintenance functions, such as transmitting uplink and downlink upper-layer (LLC layer) signaling and data, performing downlink data flow control, and blocking, unblocking, and restarting BSSGP Virtual Connections (BVCs).

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FR The physical layer of the Gb interface adopts the Frame Relay (FR) protocol. The physical media of the Gb interface can be E1 or T1. The frame relay module enables interworking between sub-networks so that the PCU and the SGSN can connect with each other either directly (point-to-point connection) or through a frame relay network (intermediate network connection), as shown in Figure 10-19 and Figure 10-20, respectively. Figure 10-19 Point-to-point connection

Figure 10-20 Intermediate network connection

NS The Network Service (NS) layer is distributed on both sides of the Gb interface and has symmetrical functions on both sides. The NS layer provides the following functions for the BSSGP layer: l

Upper-layer SDU transmission: All messages from the BSSGP layer are encapsulated in Service Data Units (SDUs) at the NS layer. The NS layer provides reliable channels and protection for normal operation of the upper layer.

l

Network congestion detection: When the NS layer detects that congestion occurs on lowerlayer links or congestion is relieved, it notifies the upper layer of the condition through a congestion indication message so that the upper layer can handle it accordingly.

l

Network state detection: When the NS layer finds that a lower-layer link fails to transmit data or the fault is rectified, it notifies the upper layer of the faulty point (recovery point) so that the upper layer can handle it accordingly.

BSSGP The Base Station Subsystem GPRS Protocol (BSSGP) layer is distributed on both sides of the Gb interface but has different functions on both sides. Figure 10-21 shows the service models of the BSSGP protocol on the BSS and SGSN sides. Issue 03 (2011-08-31)


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Figure 10-21 Service models of the BSSGP protocol on the BSS and SGSN sides

The BSSGP layer provides the following functions for the upper layer: l

Network Management BSSGP (NMBSSGP). This part performs the network management function on the Gb interface. The network management function includes downlink data flow control, blocking, unblocking and resetting of BSSGP Virtual Connections (BVCs), and MS tracing.

l

GPRS Mobility Management BSSGP (GMMBSSGP). This part performs the GPRS mobility management function on the Gb interface. The GPRS mobility management function includes MS paging, synchronization of MS radio access capability, and suspending and resuming of GPRS services.

l

Uplink and downlink data transfer. This part transparently transmits uplink and downlink data. The data transfer service is called RL BSSGP service on the BSS side but LLC BSSGP service on the SGSN side.

Configuration Rules of the Gb Interface Links This section describes the configuration rules and reference information related to the Gb interface links. The Gb interface can use the FR protocol or the IP protocol. For different protocols, the configuration parameters and configuration rules of the Gb interface links are different. When the Gb interface uses the FR protocol, the configuration of Gb interface links involves the NSE, BC, NSVC, and PTPBVC. When the Gb interface uses the IP protocol, the configuration of Gb interface links involves the NSE, local NSVL, remote NSVL, and PTPBVC. Table 10-6 describes the configuration parameters.

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Table 10-6 Description of the configuration parameters Configuration Parameter

Description

BC (Bearer Channel)

BC is the bearer channel for the frame relay. It is an E1/T1 timeslot group used to transfer data and signaling on the Gb interface. Bandwidth = Number of timeslots x 64 kbit/ s. One or several BCs can be configured on one E1. Each BC on an E1 is assigned a number to facilitate local management. This number is called BC ID. For an E1, the BC ID at the local end and the BC ID at the peer end can be different, but the timeslot distribution at both ends must be consistent.

NSVC (Network Service Virtual Connection)

NSVC is the end-to-end virtual connection between the BSC6900 and the SGSN. The NSVC on the BSC6900 side and the NSVC on the SGSN side have a one-to-one relation. Their NSVCIs are the same. The NS divides the NSVCs into different groups. Each group is identified by an NSEI. The NSVCs in the same group work in load sharing mode. If one NSVC fails, the NS switches the data on this NSVC to another NSVC for transmission. One NSVC group of the BSC6900 is connected to one SGSN. In an FR network, one NSVC corresponds to one PVC. In an IP network, one NSVC is identified by the combination of the local IP address, local port, peer IP address, and peer port.

PVC (Permanent Virtual Connection)

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PVC is the permanent virtual connection for the frame relay. It is a logical transmission channel. Multiple PVCs can be established on one BC. The PVCs are identified by Data Link Connection Identifiers (DLCIs). The DLCI on the BSC6900 side and that on the SGSN side must be the same. The PVC is created together with the NSVC.


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Configuration Parameter

Description

NSE

The NSE is represented by a BVC set at the BSSGP layer and an NSVC set at the NS layer. The NSE is identified by the NSEI. The NSEI on the BSC6900 side and that on the SGSN side must be consistent. The NSE can be configured to use the FR protocol or IP protocol. In the case of Gb over FR, BC and NSVC need to be configured. In the case of Gb over IP, device IP address, port number, routing, and NSVL need to be configured.

Local NSVL and remote NSVL

A local NSVL is an IP end point at the local end. It is used to carry the services on a specific NSE. The configuration parameters related to a local NSE are IP address and UDP port number, which are configured on the FG2a/FG2c/GOUc board. A remote NSVL is an IP end point at the remote end. It is a connection parameter provided by the SGSN. The local and remote NSVLs specify a communication link.

PTPBVC (Point To Point BSSGP Virtual Connection)

PTPBVC is the point-to-point virtual connection at the BSSGP layer.

Figure 10-22 shows the logical connections at the NS and BSSGP layers between the BSC6900 and the SGSN.

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Figure 10-22 Logical connections at the NS and BSSGP layers

l

As shown in Figure 10-22, the NSE is represented by a BVC set at the BSSGP layer and an NSVC set at the NS layer. The NS layer provides data transmission channels for the BSSGP layer. The data transmission channels for the cells under one NSE must be selected from the NSVC set under this NSE so that the traffic is evenly distributed among the NSVCs.

l

In the case of Gb over FR, services are carried on the NSVC and BC. In the case of Gb over IP, services are carried on the links specified by the local and remote NSVLs.

Characteristics of Gb Interface This section describes the characteristics of the Gb interface. The Gb interface has the following characteristics: l

Flexible physical port and LMI support The M900/M1800 PCU supports E1 ports that comply with ITU-T recommendations. The Local Management Interface (LMI) supports ITU-T Q933 appendix A, specified in GSM protocols, CISCO LMI, and ANSI T1-617 appendix D. This enables Huawei PCU to interwork with another vendor's equipment.

l

Flexible FR BC bandwidth and NS Virtual Connection (VC) bandwidth A physical bearer channel of the frame relay layer of the M900/M1800 PCU can be configured with a bandwidth between 1 x 64 kbit/s and 31 x 64 kbit/s. An NS VC at the NS layer can be configured with a bandwidth between 1 kbit/s and 1,984 kbit/s. This facilitates network planning.

l Issue 03 (2011-08-31)

Load sharing at the NS layer Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

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The M900/M1800 PCU supports load sharing among all NS VCs under one NSE. NS VCs can be located on different boards. This is crucial in improving the transmission reliability and utilization of the Gb interface. l

BSSGP entity switchover The M900/M1800 PCU supports switchovers between BSSGP PTP entities and between BSSGP SIG entities. When a PTP entity is unavailable, services carried by this entity are automatically switched over to another available PTP entity, regardless of whether the available PTP entity is located on the same physical board as the faulty PTP entity. When a SIG entity is unavailable, services carried by this entity are automatically switched over to another available SIG entity, regardless of whether the available SIG entity is located on the same physical board as the faulty SIG entity. The entity switchover function improves reliability of the BSSGP layer.

10.2.4 Data Configuration Principles for the Pb interface The Pb interface connects the PCU and the BSC. It manages cells, packet channels, and various shared resources such as E1 trunk cables and system information, between the PCU and the BSC. In addition, the Pb interface supports dynamic channel conversion and MS access to CCCH.

Internal Structure of Pb Interface This section describes the internal structure of the Pb interface. The Pb interface, as an internal protocol, has three layers: l

The physical layer (layer 1) uses E1 sub-timeslots to implement its functions. In fact, the Pb interface and the G-Abis interface share the same physical link by using sub-timeslot multiplexing. One E1 is divided into 128 sub-timeslots of 16 kbit/s each, with 4 subtimeslots used for synchronization. Some of these sub-timeslots are used for the physical link on the G-Abis interface, some are used for the physical link on the Pb interface, and the rest may serve as idle sub-timeslots or are multiplexed for the A interface. The G-Abis interface is the internal interface between the PCU and the BTS.

l

The link layer (layer 2) is based on the Link Access Protocol D-channel (LAPD) protocol, which is a general data link layer protocol. It receives data from the physical layer and provides connection-oriented or connectionless services for layer 3. LAPD provides peerto-peer reliable message transfer between layer 3 entities.

l

The layer 3 protocol consists of a series of self-defined signaling messages and it is the core of the Pb interface. It mainly manages various GPRS resources between the PCU and the BSC, supports conversion of dynamic channels between packet services and speech services, and provides functions such as MS access to CCCH and speech paging message transmission.

Management of the trunk circuits on the Pb interface Managing trunk circuits on the Pb interface helps keep consistency in trunk circuit status between the BSC and the PCU. This ensures that an idle circuit can be assigned when the PCU requests a PDCH or dynamically changes channel coding. The procedures for Pb interface circuit management involve circuit block, circuit unblock, unequipped circuit, and circuit reset. A procedure is initiated when maintenance is performed or the state of Pb interface equipment changes. Issue 03 (2011-08-31)


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The following principles are employed for Pb interface circuit management: l

The BSC records only the maintenance status of a circuit but not the use status.

l

The BSC initiates circuit management messages.

l

The PCU can block, unblock, and reset circuits at the local end, without affecting the circuit status on the BSC side.

l

The BSC cannot unblock a circuit that is blocked on the maintenance console of the PCU.

The procedures for circuit block, circuit unblock, unequipped circuit, and reset circuit are almost the same as those on the A interface. The only difference is that the MSC is changed to the PCU and the Circuit Identification Code (CIC) on the A interface is changed to the Packet Circuit Identification Code (PCIC) on the Pb interface. Figure 10-23 shows a circuit block procedure on the Pb interface. Figure 10-23 Circuit block procedure on the Pb interface

Packet radio resource management Packet radio resource management on the Pb interface refers to the management of radio resources related to packet services. Packet radio resource management adopts the following principles: l

All information about radio resources is configured on the BSC side. The PCU obtains radio resource information from the BSC. A cell initialization process over the Pb interface involves three procedures: The cell is reset on both the BSC and PCU sides; the BSC notifies the PCU of the packet radio resource configuration of the cell; packet system information is broadcast.

l

Circuit services and packet services share radio resources. Radio resources are allocated on demand but circuit services have priority over packet services. Dynamic allocation of resources on demand requires the BSC to adjust radio resources between circuit services and packet services in real time based on service requests. This means dynamic conversion between TCHs and PDCHs. There are three channel conversion procedures on the Pb interface: – When there is no PDCH for a packet assignment, the PCU requests the BSC to convert a TCH into a PDCH. The BSC accepts or rejects the request according to the available resources. If there are many idle TCHs, the BSC accepts the request, converts a TCH into a PDCH, and then notifies the BTS to modify channel attributes.

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– When the BSC finds that TCHs are insufficient, it requests the PCU to release some PDCHs for conversion into TCHs. Releasing PDCHs in this case is mandatory because circuit services have priority over packet services. – When the PCU finds many idle PDCHs, it automatically releases some PDCHs, also for conversion into TCHs. This is also because circuit services have priority over packet services. l

The BSC is responsible for assigning TCHs, whereas the PCU is responsible for assigning PDCHs. After the PCU has been assigned a PDCH, allocating and releasing this PDCH is decided by the PCU. Similarly, the BSC is responsible for the allocation and release of TCHs.

l

The status of radio resources on the BSC and PCU sides must be consistent. To keep state consistency between the PCU and BSC sides, the BSC needs to notify the PCU of state changes of radio resource in time. For example, when the OMC blocks a certain PDCH, the BSC must notify the PCU to update the channel state.

Packet service access To support GPRS, the system broadcasts system information type 13 on the BCCH, and at the same time modifies system information type 3 and system information type 7 so that they contain GPRS information such as GPRS Indicator. Based on these types of system information, an MS decides whether and how to access the current serving cell for packet services. When no PCCCH is configured in the serving cell, the MS requests packet services through the CCCH. This mainly involves three procedures: packet call access initiated by the MS, packet call access terminated by the MS, and packet service suspension and resumption of class-B MSs.

Other management procedures on the Pb interface Other management procedures on the Pb interface are transmission management, PbSL management, error handling, and PbSL check.

Transmission Management In a conversion from TCH to PDCH, the BSC needs to connect the trunk circuit on the Abis interface to the trunk circuit on the Pb interface. During packet data transmission, the BSC needs to forward packet data between the BTS and the PCU. In a conversion from PDCH to TCH, the BSC needs to disconnect the trunk circuit on the Abis interface from the trunk circuit on the Pb interface. In general, each PDCH corresponds to a 16 kbit/s terrestrial timeslot. If transmission quality is satisfactory, the PCU can use a more efficient channel coding scheme, such as CS-3 or CS-4. In this case, the BSC needs to allocate one more 16 kbit/s timeslot to the PDCH, giving it a 32 kbit/s terrestrial timeslot.

PbSL Management The Pb interface signaling link (PbSL) is a LAPD link. PbSL management involves the transmission and reception of Pb interface message packets and PbSL load sharing. If there is no PCCCH in a cell, disconnecting all the PbSLs or restoring any PbSL to normal operation subsequently leads to the release of resources in the cell on both sides of the Pb interface. Issue 03 (2011-08-31)


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Error Handling Some bits of a message may become erroneous during transmission. The Pb interface has an error handling function to combat this. By using this function, erroneous messages are omitted and some "confusion" messages are transmitted selectively.

PbSL Check A PbSL between the PCU and the BSC may experience one-way audio because the E1 between them may be connected incorrectly. Therefore, a mechanism for detecting one-way audio on PbSL is introduced. In this mechanism, the PCU actively sends a PbSL detection message to the BSC. If the BSC receives this message, it responds with an ACK message. The PCU determines whether one-way audio occurs based on whether it receives the ACK message.

Characteristics of Pb Interface This section describes the characteristics of the Pb interface. The Pb interface has the following characteristics: l

Maintaining consistency in resource status between the BSC and the PCU The PCU and the BSC are located in two separate places, but the information about all shared resources (such as cells, channels, PCIC trunk cables, and system information parameters) should be consistent between them. This is a major function of the Pb interface. Maintaining resource status consistency involves managing and maintaining cell parameter configuration, cell restarting, channel blocking and unblocking, PCIC blocking and unblocking, PCIC restarting, packet system information parameter configuration, and regular check of all resource data.

l

Supporting dynamic channel conversion between packet services and circuit services Channels are classified into three types according to their properties: fixed packet channels, voice traffic channels, and dynamic channels. Fixed packet channels, such as PBCCH and PCCCH, are dedicated for packet services. Voice traffic channels, such as TCH, BCCH and SDCCH, are dedicated for voice services. Dynamic channels are initialized as TCHs at first. Dynamic channels can be converted between the former two types of channels. When packet traffic is heavy and voice traffic is light, the PCU requests the BSC to convert dynamic channels into dynamic packet channels. When voice traffic is heavy, the BSC requests the PCU to release the converted dynamic channels and then reuses them as voice channels. In this process, voice services have priority over packet services to guarantee the original voice services.

l

Supporting transmission of packet service requests over CCCH The BTS cannot identify an access request message sent by an MS on the CCCH. After the BSC interprets the message and finds that it is a packet access request, the BSC forwards this message to the PCU. Similarly, an immediate assignment message from the PCU must be processed by the BSC before it is sent to the BTS. This indicates that when an MS sends an access request over the CCCH and the PCCCH, the processing in the BSS is different. MSs sending packet access requests through the CCCH are not complex, and therefore their costs are low. MSs of this type are widely used in the early phase of GPRS service deployment. This function enables the PCU to support two types of access modes, enhancing system adaptability.

l

Supporting GPRS suspension and resumption messages sent by class B MSs Class B MSs cannot process CS services and PS services simultaneously. Therefore, when an MS in packet transfer mode starts processing a voice service, it sends a GPRS suspension

Issue 03 (2011-08-31)


101



request to the BSC. The BSC then forwards this message to the PCU through the Pb interface. When the voice service is finished, the BSC sends a GPRS resumption request to the PCU through the Pb interface. The system capability for supporting class B MSs is enhanced as the Pb interface processes GPRS suspension and resumption messages. l

Terrestrial and satellite transmission The Pb interface supports terrestrial and satellite transmission. These two transmission modes allow the BSC and PCU to be located in different equipment rooms. This solves the problem of long-distance transmission when one PCU is connected to multiple BSCs.

10.3 Configuration Guidelines for the GBTS This section describes the configuration rules and reference information related to a base station.

10.3.1 Configuration Guidelines for Cabinet Numbers This section describes the numbering rules of the 3900 series SingleRAN BTS cabinets, subracks. A site can be configured with both the virtual cabinet and the physical cabinet. Table 10-7 provides the numbering rules of cabinets. Table 10-7 Numbering rules of cabinets Cabinet Number

Description

0-62

l BBU can be configured in cabinet 0-7. l In the case of a distributed base station with a physical cabinet or a macro base station, a physical cabinet can be used. l In the case of a distributed base station without a physical cabinet, a virtual cabinet can be used. l In the case of BBU being configured in APM30 physical cabinet and BBU not monitoring BTS boards in the base station cabinet, the cabinet BBU is configured in should be configured as virtual cabinet. l A maximum of eight cabinets can be configured for the GU mode when the TCS is configured locally.

10.3.2 Configuration Guidelines for Subracks This section describes the principles for configuring the subrack No. of 3900 series SingleRAN base stations.

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102



1.

In the case of the type of cabinet is fixed, physical subracks (such as BBU3900, RFU) are existed fixedly.

2.

Some optional peripherals (such as EMS, GPS receiver) can be configured in a independent cabinet for consistency and expansibility.

The numbering rules of the subrack for each type of cabinet are the same. The user cannot define the fixed subrack No., but can define the subrack No. of extended subracks. The numbering rules of the subracks are shown in Table 10-8. Table 10-8 The numbering rules of the subrack for SingleRAN BTS Subrack No.

Type

Description

0

Physical subrack.

The BBU subrack in cabinet 0-7.

2-3

Reserved.

-

4

Physical subrack.

RFU

6

Reserved.

-

7

Physical subrack.

PMU

8

Physical subrack.

TCU

9

Reserved.

-

10

Reserved.

-

11

Physical subrack.

FMU

13-39

Reserved.

Reserve for physical subrack. It is lied on the type of cabinet.

40-59

Extended subrack.

These subracks can house the GPS receiver (one for a site), EMU (one for a site generally).

60-254

Physical subrack.

RRU

1

5

12

10.3.3 Configuration Guidelines for Slot Numbers This section describes the numbering rules of slots of the SingleRAN and non-SingleRAN 3900 series base stations.

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103



Numbering Rules of Slots of the SingleRAN Base Stations The mapping between a slot number and a board type depends on hardware specifications, as listed in Table 10-9. Table 10-9 Numbering Rules of Slots of the SingleRAN Base Stations Board Type

Cabinet Number

Subrack Number

Slot Number

USCU

0~7

0~1

0~4

UBRI

1~2

You are advised to install the UBRI board in slot 2.

GTMU

6

The GTMU must be configured in slot 6.

FAN

16

The FAN must be configured in slot 16.

UPEU/UEIU

18~19

The UPEU or UEIU must be configured in slots 18 and 19.

DRFU/GRFU/ MRFU PMU

0~62

4~5

0~5

7

0

PSU

Issue 03 (2011-08-31)

Description

1~6

TCU

8

0

No board

9

No board is configured in slot 9.

FMU

11~12

0

DGPS/EMU/ GATM

40~59

0

DRRU/GRRU/ MRRU

60~254

0


104



Numbering Rules of Slots of the Non-SingleRAN Base Stations Table 10-10 Numbering Rules of Slots of the Non-SingleRAN Base Stations Board Type

Subrack Number

Slot Number

Description

DEMU

2

0~1

The APMU and DTCU can be configured in slots 0 to 23 of subrack 5.

APMU or DPMU

2~5

DTCU

6~7

FMU or FMUA

8~11

GATM

16~17

GTMU

0

6

UBFA

16

UEIU or UPEU

18~19

10.3.4 Mapping Between Base Stations and Optional Cabinets This section describes the mapping between the SingleRAN 3900 series base stations and optional cabinets.

Mapping Between the SingleRAN Base Stations and Optional Cabinets Table 10-11 Mapping Between the SingleRAN Base Stations and Optional Cabinets BTS Type

DBS3900

Issue 03 (2011-08-31)

Physical Cabinet

APM cabinets

Silk Screen of a Cabinet Nameplate

Optical Cabinet (The types are consistent with the correspondin g values on the LMT)

APM30

APM30

APM30H

APM30

APM100

APM100

APM200

APM200

PS4890

PS4890


Description

105


BTS Type


Physical Cabinet

TMC cabinets

Battery group



Description

OMB

OMB

When an OMB is used in a BTS3900C, the silk screen of the cabinet nameplate should be BTS3900C.

TMC

TMC

TMC11H

TMC

BBC

No BBC is configured.

IBBS200D

BBC

IBBS200T

BBC

Virtual cabinet

BTS3900

BTS3900A

BTS3900 cabinets

BTS3900 GSM

BTS3900

PS4890

PS4890

PS4890

Virtual cabinet

AMP cabinets RFC cabinets

Issue 03 (2011-08-31)

VIRTUAL

VIRTUAL

APM30

APM30

APM30H

APM30

RFC

RFC-6


If a cabinet is different from the preceding cabinets, this cabinet should be configured as a virtual cabinet.


106


BTS Type


Physical Cabinet

TMC cabinets

Battery group



TMC

TMC

TMC11H

TMC

IBBS200D

BBC

IBBS200T

BBC

BBC

No BBC is configured.

Virtual cabinet

BTS3900L cabinets

VIRTUAL

BTS3900L GSM

Virtual cabinet

Description


BTS3900L VIRTUAL

BTS3900L


Mapping Between the Non-SingleRAN Base Stations and Optional Cabinets Table 10-12 Mapping Between the Non-SingleRAN Base Stations and Optional Cabinets

Issue 03 (2011-08-31)

BTS Type

Optical Cabinet (The types are consistent with the corresponding values on the LMT)

BTS30

BTS30

BTS312

BTS312

BTS3001C

BTS3001C Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

Description

107



BTS Type

Optical Cabinet (The types are consistent with the corresponding values on the LMT)

BTS3001C+

BTS3001CP

BTS3002C

BTS3002C

BTS3012A

BTS3012A

BTS3006A

BTS3006A

BTS3012

BTS3012

BTS3006C

BTS3006C

BTS3002E

BTS3002E

BTS3012AE

BTS3012AE

BTS3012 II

BTS3012_II

BTS3900B GSM

BTS3900B_GSM

BTS3900E GSM

BTS3900E_GSM

BTS3900 GSM

BTS3900_GSM BTS3900_GSM_6RFC

Description

l Recommended. l The filler panel can be set through the Configure RFU by Slot parameter in the ADD BTS command.

BTS3900A GSM

BTS3900A_GSM BTS3900A_GSM_6RFC

l Recommended. l The filler panel can be set through the Configure RFU by Slot parameter in the ADD BTS command.

DBS3900 GSM

DBS3900_GSM

BTS3036

BTS3036 BTS3036_6RFC

BTS3036A

BTS3036A BTS3036A_6RFC

DBS3036

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DBS3036


The configuration principle of the BTS3036 is the same as that of the BTS3900. The configuration principle of the BTS3036A is the same as that of the BTS3900A. The configuration principle of the DBS3036 is the same as that of the BTS3900.

108



10.3.5 Configuration Rules of the BTS Boards This section describes the configuration rules of the SingleRAN and non-SingleRAN BTS boards.

Configuration Rules of the SingleRAN BTS Boards BTS3900 Table 10-13 Configuration rules of the BTS3900 boards Board Type

Automatic Configuration or Manual Configuration

EMU

Manual configuration. An EMU needs to be configured when the number of Boolean inputs provided by the UPEU and UEIU cannot meet the requirements.

PMU

Manual configuration

FMU


GATM

Manual configuration. A GATM needs to be configured when the newly deployed GSM BTS is configured with an RET antenna or a TMA.

PSU


GTMU

Automatic configuration

FAN


UEIU


UPEU


UBRI


USCU


DRFU


GRFU


MRFU


DBS3900

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109



Table 10-14 Configuration rules of the DBS3900 boards Board Type


EMU


PMU


DTCU


GTMU


FAN


UEIU


UPEU


UBRI


USCU


DRRU


GRRU


MRRU


BTS3900A Table 10-15 Configuration rules of the BTS3900A boards

Issue 03 (2011-08-31)

Board Type


EMU


PMU


DTCU


FMUA/FMU


GATM


GTMU

Automatic configuration Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

110



Board Type


FAN


UEIU


UPEU


UBRI


USCU


DRFU


GRFU


MRFU


BTS3900L Table 10-16 Configuration rules of the BTS3900L boards

Issue 03 (2011-08-31)

Board Type


EMU


PMU


DTCU


FMUA/FMU


GATM


GTMU


FAN


UEIU


UPEU


UBRI


USCU


DRFU



111



Board Type


GRFU


MRFU


Configuration Rules of the Non-SingleRAN BTS Boards BTS3900B Table 10-17 Configuration rules of the BTS3900B boards Board Type


3900B


BTS3900E Table 10-18 Configuration rules of the BTS3900E boards Board Type


DEMU


APMU


DTCU


3900E


BTS3012 Table 10-19 Configuration rules of the BTS3012 boards

Issue 03 (2011-08-31)

Board Type


DTMU


DEMU


DCSU


DCCU


DATU

Manual configuration Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

112



Board Type


DPTU


DABB


DCMB

Automatic configuration in the case of 12 TRXs

ECMB

Automatic configuration in the case of 18 TRXs

DBS3900 Table 10-20 Configuration rules of the DBS3900 boards Board Type


APMU


DTCU


DEMU

Manual configuration. A DEMU needs to be configured when the number of Boolean inputs provided by the UPEU and UEIU cannot meet the requirements.

GATM


GTMU


UBFA


UEIU


UPEU


BTS3900 Table 10-21 Configuration rules of the BTS3900 boards

Issue 03 (2011-08-31)

Board Type


FMU



113



Board Type


DEMU


GATM


GTMU


UBFA


UEIU


UPEU


BTS3900A Table 10-22 Configuration rules of the BTS3900A boards

Issue 03 (2011-08-31)

Board Type


APMU


DTCU


FMUA


DEMU


GATM


GTMU


UBFA


UEIU


UPEU



114



10.3.6 Configuration Guidelines for Monitoring Boards This section describes configuration rules and reference information related to monitoring boards. Monitoring boards consist of Environment Monitoring Unit (EMU), Power Monitoring Unit (PMU), Fan Monitoring Unit (FMU), and Temperature Control Unit (TCU). Table 10-23 describes the mapping between their logical names and physical devices. Table 10-23 Monitoring Boards of a Base Station Logical Name

Physical Device

Cabinet Type

Description

EMU

All cabinets

Wall-mounted Environment Monitoring Unit in an equipment room

EMUA

All cabinets

PMU

All cabinets

EPMU01

APM30

Embedded Power and Environment Monitoring Unit type 01

EPMU01B

APM30

Embedded Power and Environment Monitoring Unit type 01B

EPMU03

OMB

Embedded Power and Environment Monitoring Unit type 03

FMU

All cabinets

Fan Monitoring Unit

FMUB

BTS3900

Fan Monitoring Unit type B

TCU

All cabinets

Temperature Control Unit

AFMU

BTS3900A/APM30/ TMC

APM Fan Monitoring Unit

HEUA

APM30/TMC/OMB

Heat Exchange Unit type A

CMUA

APM30/TMC/BBC

Central Monitoring Unit type A

EMU

PMU

FMU

TCU

Issue 03 (2011-08-31)


Environment Monitoring Unit installed in a cabinet Power Monitoring Unit

115



Table 10-24 lists rules of configuring monitoring boards of the BTS3900A. Table 10-24 Rules of configuring monitoring boards of the BTS3900A

Issue 03 (2011-08-31)

Cabinet No. (Cabinet Name)

Part No./ Part Name

Cabinet No.

Subrack No.

Slot No.

Serial Port No.

Commun ication Address

Cabinet 0 (AMP30)

PMU0

0

7

0

1

3

Cabinet 1 (AMP30)

PMU1

5

7

0

0

3

Cabinet 2 (AMP30)

PMU2

6

7

0

1

4

Cabinet 0 (AMP30)

TCU0

0

8

0

1

7

Cabinet 1 (AMP30)

TCU1

5

8

0

0

7

Cabinet 2 (AMP30)

TCU2

6

8

0

1

6

Cabinet 0 (TMC)

TCU3

8

8

0

0

6

Cabinet 0 (RFC)

FMU0

1

11

0

0

14

Cabinet 1 (RFC)

FMU1

2

11

0

0

15

Cabinet 2 (RFC)

FMU2

3

11

0

1

14

Cabinet 3 (RFC)

FMU3

4

11

0

1

15

Cabinet 0 (APM30)/ Cabinet 0 (BBC)

BBC/ TCU0

9

8

0

1

23


BBC/ TCU1

10

8

0

1

24


BBC/ TCU0

11

8

0

0

23


116




Part No./ Part Name

Cabinet No.

Subrack No.

Slot No.

Serial Port No.



BBC/ TCU1

12

8

0

0

24


BBC/ TCU0

13

8

0

1

25


BBC/ TCU1

14

8

0

1

26

Cabinet 0 (AMP30)

EMU/ EMUA

0

40

0

1

2

Cabinet 0 (AMP30)

GATM0

0

50

0

0

22

Cabinet 0 (AMP30)

GATM1

0

51

0

1

22

Table 10-25 lists rules of configuring monitoring boards of the BTS3900. Table 10-25 Rules of configuring monitoring boards of the BTS3900

Issue 03 (2011-08-31)


Part No./ Part Name

Cabinet No.

Subrack No.

Slot No.

Serial Port No.


Cabinet 0 (indoor macro BTS3900 cabinet)

FMU0

0

11

0

0

14


FMU1

1

11

0

0

15


117




Part No./ Part Name

Cabinet No.

Subrack No.

Slot No.

Serial Port No.



FMU2

2

11

0

1

14


PMU0

0

7

0

1

3


PMU1

1

7

0

0

3


PMU2

2

7

0

1

4

BTS3900 cabinet (or wallmounted)

EMU/ EMUA

0

40

0

1

2

Cabinet 0 (AMP30)

GATM0

0

50

0

0

22

Cabinet 0 (AMP30)

GATM1

0

51

0

1

22

Table 10-26 lists rules of configuring monitoring boards of the DBS3900. Table 10-26 Rules of configuring monitoring boards of the DBS3900

Issue 03 (2011-08-31)


Part No./ Part Name

Cabinet No.

Subrack No.

Slot No.

Serial Port No.


Cabinet 0 (AMP30)

PMU0

20

7

0

1

3


118




Part No./ Part Name

Cabinet No.

Subrack No.

Slot No.

Serial Port No.


Cabinet 1 (AMP30)

PMU1

21

7

0

0

3

Cabinet 0 (AMP30)

TCU0

20

8

0

1

7

Cabinet 1 (AMP30)

TCU1

21

8

0

0

6

Cabinet 0 (TMC)

TCU2

28

8

0

0

7


BBC/ TCU0

29

8

0

1

23


BBC/ TCU1

30

8

0

1

24


BBC/ TCU0

31

8

0

0

23


BBC/ TCU1

32

8

0

0

24

Cabinet 0 (AMP30)

EMUA

20

40

0

1

2

Cabinet 0 (OMB)

PMU0

0

7

0

1

3

Cabinet 0 (OMB)

TCU0

0

8

0

1

7

Cabinet 1 (OMB)

TCU1

5

8

0

1

6

Table 10-27 lists rules of configuring monitoring boards of the BTS3900L.

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119



Table 10-27 Rules of configuring monitoring boards of the BTS3900L Cabinet No. (Cabinet Name)

Part No./ Part Name

Cabinet No.

Subrack No.

Slot No.

Serial Port No.


Cabinet 0 (indoor macro BTS3900 L cabinet)

FMU0

0

11

0

0

14

Cabinet 0 (indoor macro BTS3900 L cabinet)

FMU1

0

12

0

0

15

BTS3900 L cabinet (or wallmounted)

EMU/ EMUA

0

40

0

1

2

Cabinet 0 (AMP30)

GATM0

0

50

0

0

22

Cabinet 0 (AMP30)

GATM1

0

51

0

1

22

10.3.7 Configuration Guidelines for Power Systems This section describes the configuration guideline for the power system of a base station. The configuration guideline for the power system of a base station is listed in Table 10-28. Table 10-28 Configuration Guideline for the Power System of a Base Station Physical Cabinet

APM Cabinets

Issue 03 (2011-08-31)


Power System (The types are consistent with the corresponding values on the LMT)

Description

APM30

APM30

-

APM30H

APM30

-

APM30(Ver.C)

APM30

-

APM100

APM100

-

APM200

APM200

-


120



Physical Cabinet


Power System (The types are consistent with the corresponding values on the LMT)

Description

PS4890

PS4890

EPS4890

-

BTS3900

BTS3900 XXXX

EPS4890

Only applies to the alternating current cabinet of the BTS3900. xxxx indicates the mode of the BTS3900, such as GSM or WCDMA.

BTS3900(Ver.C)

EPS4890

-

OMB

EPS4815

-

SC48200

SC48200

-

SC4850

SC48200

-

BTS3012AE

DPMU

Applies to the scenario of reuse of the doubletransceiver series base stations.

BTS3012

DPMU


BTS3012II

DPMU


OMB Solar power system

Double-transceiver series base stations

10.3.8 List of User-Defined Alarm Ports This section describes the mapping of user-defined alarm ports and cables of SingleRAN BTS3900 series. The monitoring units of the BTS3900 series for monitoring external alarms are EMU, TCU, UPEU, UEIU, FMU, and PMU.

EMU The EMU is configured in slot 0 of subracks 40 to 59. Table 10-29 lists the mapping of EMU user-defined alarms ports and cables. Issue 03 (2011-08-31)


121



Table 10-29 List of EMU user-defined alarm ports

Issue 03 (2011-08-31)

Port on the Monitorin g Unit

Port No.

Monitorin g Signal Cable

Wire

Wire Color

Descriptio n

S1+/S1-

0

N/A

N/A

S2+/S2-

1

Sensorequipped cable

S3+/S3-

2

Ports for monitoring Boolean signals

S4+/S4-

3

S5+/S5-

4

S6+/S6-

5

S7+/S7-

6

S8+/S8-

7

S9+/S9-

8

S10+/S10-

9

S11+/S11-

10

S12+/S12-

11

S13+/S13-

12

S14+/S14-

13

S15+/S15-

14

S16+/S16-

15

S17+/S17-

16

S18+/S18-

17

S19+/S19-

18

S20+/S20-

19

S21+/S21-

20

S22+/S22-

21

S23+/S23-

22

S24+/S24-

23

S25+/S25-

24

S26+/S26-

25

S27+/S27-

26

S28+/S28-

27


122




Port No.

S29+/S29-

28

S30+/S30-

29

S31+/S31-

30

S32+/S32-

31

Analog sensor of the current type: 24V1 (12V1)/ ANA1

32


Wire

Wire Color

Descriptio n

Ports for monitoring analog signals

Analog sensor of the voltage type: 24V1 (12V1)/ ANA1/GND Analog sensor of the current type: 24V2 (12V2)/ ANA2

33

Analog sensor of the voltage type: 24V2 (12V2)/ ANA2/GND Analog sensor of the current type: 24V3 (12V3)/ ANA3

34

Analog sensor of the voltage type: 24V3 (12V3)/ ANA3/GND

Issue 03 (2011-08-31)


123




Port No.

Analog sensor of the current type: 24V4 (12V4)/ ANA4

35


Wire

Wire Color

Descriptio n

Analog sensor of the voltage type: 24V4 (12V4)/ ANA4/GND

UPEU The UPEU is configured in slot 18 or 19 of subracks 0. Table 10-30 lists the mapping of UPEU user-defined alarms ports and cables. Table 10-30 List of UPEU user-defined alarm ports

Issue 03 (2011-08-31)


Port No.


Wire

Wire Color

Descriptio n

EXT-ALM0

8

BBU Boolean alarm cable

X1.1/X1.2

Orangewhite/orange

Boolean input 0+/ Boolean input 0(GND)

9

X1.3/X1.6

Green-white/ green


10

X1.5/X1.4

Blue-white/ blue


11

X1.7/X1.8

Brownwhite/brown



124




Port No.


Wire

Wire Color

Descriptio n

EXT-ALM1

12


X1.1/X1.2

Orangewhite/orange


13

X1.3/X1.6

Green-white/ green


14

X1.5/X1.4

Blue-white/ blue


15

X1.7/X1.8

Brownwhite/brown


UEIU The UEIU is configured in slot 18 of subracks 0. Table 10-31 lists the mapping of UEIU userdefined alarms ports and cables. Table 10-31 List of UEIU user-defined alarm ports Port on the Monitorin g Unit

Port No.


Wire

Wire Color

Descriptio n

EXT-ALM0

0


X1.1/X1.2

Orangewhite/orange


X1.3/X1.6

Green-white/ green


1

Issue 03 (2011-08-31)


125



EXT-ALM1


Port No.

Wire

Wire Color

Descriptio n

2

X1.5/X1.4

Blue-white/ blue


3

X1.7/X1.8

Brownwhite/brown


X1.1/X1.2

Orangewhite/orange


5

X1.3/X1.6

Green-white/ green


6

X1.5/X1.4

Blue-white/ blue


7

X1.7/X1.8

Brownwhite/brown


4



TCU The TCU is configured in slot 0 of subrack 8. Table 10-32 lists the mapping of TCU user-defined alarms ports and cables.

Issue 03 (2011-08-31)


126



Table 10-32 List of TCU user-defined alarm ports Port on the Monitorin g Unit

Port No.


Wire

Wire Color

IN1

0

N/A

N/A

IN2

1


IN3

2

Descriptio n

PMU The PMU is configured in slot 0 of subrack 7. Table 10-33 lists the mapping of PMU userdefined alarms ports and cables. Table 10-33 List of PMU user-defined alarm ports Port on the Monitorin g Unit

Port No.


Wire

Wire Color

N/A

0


N/A

N/A

1

Descriptio n

2 3 4 5 6

FMU The FMU is configured in slot 0 of subracks 11 to 12. Table 10-34 lists the mapping of FMU user-defined alarms ports and cables. Table 10-34 List of FMU user-defined alarm ports

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Port No.


Wire

Wire Color

SW0

0

N/A

N/A

SW1

1


SW2

2 Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

Descriptio n

127




Port No.

SW3

3


Wire

Wire Color

Descriptio n

10.3.9 Guidelines for Configuring Send and Receive Modes for RF Modules This section describes how to configure send mode, receive mode, and send and receive mode for radio frequency (RF) modules. l

Send Mode can be set to PBT only when a DRFU or DRRU is configured with only one carrier.

l

Send Mode can be set to Transmit Diversity only when a DRFU or DRRU is configured with only one carrier and Send and Receive Mode is set to DOUBLETWO_ANTENNA (Double Feeder[2TX+2RX] or DOUBLEFOUR_ANTENNA(Double Feeder[2TX +4RX].

l

Receive Mode can be set to Four-Way Receive Diversity only when a DRFU is configured with only one carrier and Send and Receive Mode is set to DOUBLEFOUR_ANTENNA (Double Feeder[2TX+4RX].

Table 10-35 lists typical configurations of RF modules' send and receive modes. Table 10-35 Typical configurations of RF modules' send and receive modes RF Module

Send Mode

Receive Mode

Send and Receive Mode

Number of Carriers

DRFU

Transmit diversity

Main diversity

Double feeder [2TX 2RX]

1/S1

Four-way receive diversity


2/S2

Main diversity

Single feeder 1/S2 [1TX 1RX]

Independent transmit or combination

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Remarks

If a DRFU has a cascaded RXU, the RXU must be configured.

1/S2

128


RF Module


Send Mode

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Number of Carriers


1/S2

Remarks

Single feeder 2/S3-S4 [1TX 2RX]




2/S4


PBT

Main diversity



Dynamic transmit diversity

Main diversity


1/S2



1/S2

Main diversity


Main diversity


Main diversity


Dynamic PBT

GRFU/ MRFU

Receive Mode



1/S2

If a GRFU or an MRFU has a cascaded RXU, the RXU must be configured.

129


RF Module

DRRU


Send Mode

Receive Mode


Number of Carriers

Main diversity


1/S3-S6

Transmit diversity

Main diversity


1/S1


Main diversity

Single feeder 1/S2 [1TX 1RX] Double feeder [1TX 2RX]

1/S2


1/S2


If a DRRU has a cascaded RXU, the RXU must be configured. If a DRRU has a cascaded RXU, the RXU must be configured.

PBT

Main diversity



Main diversity


1/S2


1/S2

Dynamic PBT

Main diversity

Single feeder 1/S2 [1TX 1RX] Double feeder [1TX 2RX]

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Remarks


1/S2

130


RF Module

GRRU/ MRRU


Send Mode

Receive Mode


Number of Carriers


1/S2

Transmit diversity

Main diversity


1/S3-S8


Main diversity


1/S3-S8



Main diversity


1/S3-S8


1/S3-S8

Remarks

If a GRRU or an MRRU has a cascaded RXU, the RXU must be configured.

10.3.10 Configuration Guidelines for Typical TRX Power The typical TRX power specifications are only used as reference for onsite configurations. Specific data configurations should be adjusted according to onsite situations. This task takes the typical TRX power configurations of the RRU3908 and MRFU as examples. For details about the typical TRX power configurations of other models, see the Product Description of the corresponding base station model. For details about the typical TRX power configuration, see the Multi-Mode Base Station Typical TRX Power.

10.3.11 Configuration Guidelines for BTS Clock Sources This section provides the configuration rules of the BTS clock sources. The following table lists the configuration rules of the BTS clock sources.

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Table 10-36 Configuration rules of the BTS clock sources Clock Mode BT S Boa rd

BTS Mod el

Trans missi on Mode

Inte rnal Clo ck

Tra ce BS C Clo ck

Exte rnal Syn c cloc k

IP Clo ck

Tra ce Tra nsp ort Clo ck

Trac e GPS Cloc k

Um Cloc k

Peer Cloc k

Syn Eth Cloc k

GT MU

DBS3 900 BTS3 900 BTS3 900A BTS3 900L

IP over FE

Sup port ed

Not supp orte d

Sup port ed

Sup port ed

Sup port ed

Supp orted

Not supp orted

Supp orted

Supp orted

IP over E1

Sup port ed

Sup port ed

Sup port ed

Not supp orte d

Not supp orte d

Supp orted

Not supp orted

Supp orted

Not supp orted

HDL C

Sup port ed

Sup port ed

Sup port ed

Not supp orte d

Not supp orte d

Supp orted

Not supp orted

Supp orted

Not supp orted

TDM

Sup port ed

Sup port ed

Sup port ed

Not supp orte d

Not supp orte d

Supp orted

Not supp orted

Supp orted

Not supp orted

IP over FE

Sup port ed

Not supp orte d

Sup port ed

Sup port ed

Sup port ed

Supp orted

Not supp orted

Not supp orted

Not supp orted

IP over E1

Sup port ed

Sup port ed

Sup port ed

Not supp orte d

Not supp orte d

Supp orted

Not supp orted

Not supp orted

Not supp orted

HDL C

Sup port ed

Sup port ed

Sup port ed

Not supp orte d

Not supp orte d

Supp orted

Not supp orted

Not supp orted

Not supp orted

TDM

Sup port ed

Sup port ed

Sup port ed

Not supp orte d

Not supp orte d

Supp orted

Not supp orted

Not supp orted

Not supp orted

HDL C

Sup port ed

Sup port ed

Sup port ed

Not supp orte d

Not supp orte d

Supp orted

Not supp orted

Not supp orted

Not supp orted

DT MU

DO MU

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Clock Source Type

BTS3 012 BTS3 012A E BTS3 012II

BTS3 006C BTS3 002E


132



Clock Mode BT S Boa rd

BTS Mod el

Clock Source Type

Trans missi on Mode

Inte rnal Clo ck

Tra ce BS C Clo ck

Exte rnal Syn c cloc k

IP Clo ck

Tra ce Tra nsp ort Clo ck

Trac e GPS Cloc k

Um Cloc k

Peer Cloc k

Syn Eth Cloc k

TDM

Sup port ed

Sup port ed

Sup port ed

Not supp orte d

Not supp orte d

Supp orted

Not supp orted

Not supp orted

Not supp orted

BT S39 00B

BTS3 900B

IP over FE

Sup port ed

Not supp orte d

Not supp orte d

Sup port ed

Not supp orte d

Not supp orted

Supp orted

Supp orted

Supp orted

BT S39 00E

BTS3 900E

IP over FE

Sup port ed

Not supp orte d

Sup port ed

Sup port ed

Sup port ed

Not supp orted

Not supp orted

Not supp orted

Not supp orted

HDL C

Sup port ed

Sup port ed

Sup port ed

Not supp orte d

Not supp orte d

Not supp orted

Not supp orted

Not supp orted

Not supp orted

TDM

Sup port ed

Sup port ed

Sup port ed

Not supp orte d

Not supp orte d

Not supp orted

Not supp orted

Not supp orted

Not supp orted

10.3.12 BTS Network Topologies The BSC6900 provides flexible BTS network topologies on the Abis interface. These topologies are star topology, chain topology, tree topology, and ring topology.

Star Topology In a star topology, BTSs connect to a BSC6900 directly, and the BTSs do not have lower-level BTSs. Star topology is a commonly used network topology. It is applicable in common scenarios, especially in densely populated areas. Figure 10-24 shows the star topology.

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Figure 10-24 Star topology

The advantages of the star topology are as follows: l

Simple network structure

l

Easy engineering implementation

l

Convenient network maintenance

l

Flexible capacity expansion

l

High network reliability

Disadvantages: Compared with other topologies, the star topology requires a largest quantity of transmission cables. Especially for small-scaled BTSs, transmission resource utilization in the star topology is not high. A timeslot integration device can be used to solve this problem.

Chain Topology In a chain topology, BTSs are cascaded. The BTSs on a cascading link can only process the timeslots of their own and transparently transmit the timeslots of the lower-level BTSs. The BTS chain topology is applicable to sparsely populated areas in the strip-like terrain, such as areas along highways and high-speed railways. If the star topology is used in this situation, the transmission resource is wasted. Therefore, the chain topology is recommended. Figure 10-25 shows the chain topology. Figure 10-25 Chain topology

Advantages: The chain topology can reduce the costs of transmission equipment and engineering construction and save the rent for the transmission links. Issue 03 (2011-08-31)


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Disadvantages: l

The reliability of the transmission link is poor because the signal transmission passes through multiple nodes.

l

A faulty BTS may affect the normal operation of its lower-level BTSs.

l

The number of cascading levels must not exceed five.

To minimize the impact of the faulty upper-level BTS on lower-level BTSs, the Abis bypass function is provided. In bypass mode, a relay switch is installed on the BTS. When a BTS is running normally, the timeslots of the lower-level BTSs are switched over from the incoming E1 port to the outgoing E1 port through the switching board of the BTS. When the BTS fails to provide services due to power-off or other reasons, the relay switch works to ensure the direct connection between the incoming E1 port and the outgoing E1 port on the BTS. Therefore, the lower-level BTSs still retain the connection to the BSC6900. Figure 10-26 shows the bypass function of the BTS. Figure 10-26 Bypass function of the BTS

Tree Topology In a tree topology, one site is connected with two or more subsites. The tree topology is the combination of the chain topology and the star topology. The tree topology is applicable to areas where network structures, BTS distribution, and subscriber distribution are complicated. Figure 10-27 shows the tree topology.

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Figure 10-27 Tree topology

Advantages: The number of transmission cables required in the tree topology is smaller than that in the star topology. Disadvantages: l

In a tree topology, the signal transmission passes through multiple nodes. Therefore, the transmission reliability is relatively low, the engineering construction is difficult, and the maintenance is inconvenient.

l

A faulty BTS may affect the normal operation of its lower-level BTSs.

l

It is inconvenient to expand the capacity of the network.

l

The number of cascading levels must not exceed five.

Ring Topology The ring topology is a special chain topology. Several BTSs form a chain, and the lowest-level BTS is connected to the BSC6900, forming a ring. If there is a breakpoint on the ring, the BTSs that precede the breakpoint remain unchanged in the network topology, whereas the BTSs that follow the breakpoint form a new chain connection in the reverse direction. The ring topology is applicable to common scenarios. Due to its strong self-healing capability, the ring topology is preferably applied so long as the transmission links meet the networking requirements. Figure 10-28 shows the ring topology.

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Figure 10-28 Ring topology

Advantages: The ring topology has a strong self-healing capability. If the E1 link at a point is broken, a new chain connection can be formed without affecting the ongoing services. Disadvantages: In a ring topology, there is always a segment of transmission link that does not transmit any data.

10.3.13 TDM-Based Networking on the Abis Interface In TDM-based networking mode, the BSC6900 and the base station communicate with each other through the SDH/PDH network, and TDM transmission is applied to the Abis interface.

TDM-Based Networking In this networking mode, the EIUa/OIUa/POUc board of the BSC6900 functions as the Abis interface board. The EIUa board provides E1/T1 ports, the OIUa board provides channelized STM-1 ports, and the POUc board provides channelized STM-1 ports and OC-3 ports. Figure 10-29 shows the TDM-based networking on the Abis interface. Figure 10-29 TDM-based networking on the Abis interface

Features of Networking Modes Advantages: The networking is mature, QoS-assured, safe, and reliable. Telecom operators can make full use of the SDH/PDH transmission network resources. Disadvantages: The cost of the TDM networking mode is higher than that of the IP networking mode.

10.3.14 IP-Based Networking on the Abis Interface In IP-based networking mode, the BSC6900 and the base station communicate with each other through the IP/SDH/PDH network, and layer 3 of the protocol stack for the Abis interface uses the IP protocol. Issue 03 (2011-08-31)


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IP over E1 Networking In this networking mode, the BSC6900 and the base station communicate with each other through the SDH/PDH network. The PEUa/POUc board functions as the Abis interface board. The PEUa board provides E1/T1 ports, and the POUc board provides STM-1 ports and OC-3 ports. See Figure 10-30. Figure 10-30 IP over E1 Networking

IP over Ethernet Networking (Layer 2) In this networking mode, the BSC6900 and the base station communicate with each other through the IP network, and the data transmitted between them is processed by the switch according to the data link layer protocol. The FG2a/GOUa/FG2c/GOUc board of the BSC6900 functions as the Abis interface board and provides FE/GE ports. Figure 10-31 shows the IP over Ethernet networking (layer 2). Figure 10-31 IP over Ethernet networking (layer 2)

IP over Ethernet Networking (Layer 3) In this networking mode, the BSC6900 and the base station communicate with each other through the IP network, and the data transmitted between them is processed by the router according to the IP protocol. The FG2a/GOUa/FG2c/GOUc board of the BSC6900 functions as the Abis interface board and provides FE/GE ports. Figure 10-32 shows the IP over Ethernet networking (layer 3).

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Figure 10-32 IP over Ethernet networking (layer 3)

Features of Networking Modes Advantages: l

IP over E1 Networking – Telecom operators can make full use of the SDH/PDH transmission network resources. – The networking is mature, QoS-assured, safe, and reliable.

l

IP over Ethernet Networking – The base station provides large-capacity bandwidth through FE/GE ports, facilitating the upgrade and capacity expansion. – The transmission network supports the evolution from the GSM TDM network to the IP network.

Disadvantages: l

IP over E1 Networking This networking mode does not meet the requirements of the evolution from the telecom network to the IP network.

l

IP over Ethernet Networking The QoS of the network cannot be guaranteed easily. Therefore, the end-to-end QoS mechanism must be adopted.

10.3.15 Typical Configuration Scenarios of the Radio Layer This section provides several typical configuration modes of the BTS radio layer in terms of cells and TRXs. The difference between different configuration modes mainly lies in the number of cells and TRXs at different BTSs.

Definition of Typical Configuration Generally, BTSs have two configuration modes, that is, S x and S x/x/x. l

"S" represents a BTS.

l

The quantity of "x"s represents the number of cells.

l

The value of "x" indicates the number of TRXs under each cell.

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For example, S2 indicates that there is one cell under a BTS, and there are two TRXs under this cell. S2/2/2 indicates that there are three cells under a BTS, and two TRXs under each cell.

Typical Configuration Scenarios The typical configuration scenarios of BTSs are as follows: l

S2

l

S2/2/2

l

S4/4/4

l

S6/6/6

l

S8/8/8

l

S12/12/12

The BTS configuration processes in all scenarios are the same. The configuration objects and quantity, however, are different from each other.

10.3.16 Concepts of the BTS Multiplexing Mode This section describes BTS multiplexing, that is, the multiplexing of the LAPD signaling on the E1 timeslots of the Abis interface. The BSC6900 provides the 64 kbit/s statistical multiplexing mode and the physical 16 kbit/s multiplexing mode.

Timeslots and Sub-Timeslots The bandwidth of each E1 link is 2.048 Mbit/s, which consists of 32 timeslots. The transmission rate on each timeslot is 64 kbit/s. Each timeslot is divided into four sub-timeslots, and the transmission rate on each sub-timeslot is 16 kbit/s.

Timeslot Types of the Abis Interface The timeslots of the BTS Abis interface are classified into the following types: l

Operation and maintenance link (OML) link for operation and maintenance of a BTS. Each BTS has only one OML, and the transmission rate on the OML is 64 kbit/s. An OML can be multiplexed with only the RSLs of the same BTS.

l

Radio signaling link (RSL) Signaling link of a TRX. Each TRX has one RSL at a rate of 64 kbit/s. RSLs can be multiplexed with only the OML or other RSLs of the same BTS.

l

Extended signaling link (ESL) Extended signaling link. When the timeslot assignment mode on the Abis interface of the BTS is set to FLEX_ABIS, each BTS requires one 64 kbit/s ESL for transmitting the signaling of dynamic Abis timeslot connection. ESL can be multiplexed with only the OML of the same BTS in a 64 kbit/s timeslot of the same E1 link.

l

Traffic channel (TCH) Traffic channel of a TRX. The full transmission rate is 16 kbit/s, and the half transmission rate is 8 kbit/s.

l

Packet Data Traffic Channel (PDCH) The transmission rate is 16kbit/s. There are two types PDCH, static PDCH and dynamic PDCH, static PDCH can only use for the PS and dynamic PDCH can use both PS and CS.

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we need configure SPDCH in the cell and dynamic PDCH can be transferred from TCHF according to the PS traffic service. l

Idle Idle timeslot of a BTS, which has a rate of 16 kbit/s. Idle timeslots can be multiplexed with only the TCHs of the same cabinet group.

l

Semi Monitoring timeslot of a BTS, which has a rate of 8 kbit/s, 16 kbit/s, 32 kbit/s, or 64 kbit/ s and cannot be multiplexed with timeslots of other types.

64 kbit/s Statistical Multiplexing Mode Statistical multiplexing is a technology where n channels share one 64 kbit/s timeslot, each in a different time slice, that is, Time Division Multiplexing (TDM). In statistical multiplexing mode, multiple channels are multiplexed onto one 64 kbit/s bandwidth. The 64 kbit/s statistical multiplexing mode consists of the following types: l

1:1

l

2:1

l

3:1

l

4:1

l

5:1

l

6:1

That is, n:1 (n<=6), where n represents the number of signaling links and 1 represents one E1 timeslot (64 kbit/s) on the Abis interface. When the Abis interface uses a 64 kbit/s timeslot for signaling transmission, traffic channels cannot use the same timeslot. RSLs use 64 kbit/s timeslots through multiplexing. In all the n:1 multiplexing modes, the speech rate is 16 kbit/s or 8 kbit/s (half rate). Four fullrate traffic channels or eight half-rate traffic channels occupy one 64 kbit/s timeslot on the Abis interface. The rate of all the signaling links is 64 kbit/s. Based on the multiplexing mode (n:1), n signaling timeslots occupy one E1 timeslot (64 kbit/s) on the Abis interface. All the timeslots implement 64 kbit/s switching in the Abis interface board of the BSC6900.

Physical 16 kbit/s Multiplexing Mode In physical 16 kbit/s multiplexing mode, a 16 kbit/s sub-timeslot is permanently assigned to a channel, that is, this channel exclusively uses this timeslot. When the Abis interface uses a 16 kbit/s rate for signaling transmission, timeslots of the E1 link, excluding timeslot 0 (synchronization timeslot), can be configured as traffic timeslots or signaling timeslots. Therefore, the multiplexing ratio is not involved.

10.3.17 Instances of BTS Multiplexing Modes This section describes the E1 timeslot assignment in 1:1, 2:1, 3:1, and 4:1 multiplexing modes. In the Abis interface, there are two types of timeslots: signaling timeslots and traffic timeslots. Signaling timeslots are used for the OML and RSLs. Traffic timeslots consist of idle timeslots, TCHs, PDCHs, and monitoring timeslots (optional). The OML and RSLs have a data rate of 64 kbit/s. Idle timeslots, TCHs, PDCHs, and monitoring timeslots (optional) have a data rate of 16 Issue 03 (2011-08-31)


141



kbit/s. Signaling links can be multiplexed to save the timeslots on the Abis interface. Signaling timeslots cannot be multiplexed with traffic timeslots on the same 64 kbit/s timeslots. NOTE

The timeslot assignment of each multiplexing mode is based on the following conditions: l The speech rate is 16 kbit/s permanently. Four channels of speech occupy one 64 kbit/s timeslot on the Abis interface. l For the first TRX, channel 0 (T00C0) is the BCCH and channel 1 (T00C1) is the SDCCH. l When the BTSs that support the Flex Abis function use the 5:1 or 6:1 multiplexing mode, each BTS needs to be configured with one ESL. l When the BTSs that support the Flex Abis function use the 5:1 and 6:1 multiplexing modes, the multiplexing ratios of OML, ESL, and RSL are 1:1:3 and 1:1:4 respectively. The differences between the multiplexing modes 5:1 and 4:1, and 6:1 and 4:1 lie in only their multiplexing of the RSLs. BCCHs and SDCCHs use RSLs, that is, the timeslots used by T00C0 and T00C1 are included in the timeslots used by the RSLs. Therefore, the 5:1 or 6:1 mode is not displayed in the tables.

Instances of the 1:1 Multiplexing Mode Assume that BTS0 is configured with one cell and four TRXs, the channels in the cell use default settings, and the multiplexing mode is 1:1. Table 10-37 lists the timeslot assignment on the Abis interface. Table 10-37 Timeslot assignment in 1:1 multiplexing mode

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Timesl ot Numb er

Sub-Timeslot Number 0 and 1

2 and 3

4 and 5

6 and 7

0

Synchronization

Synchronization

Synchronization

Synchronization

1

RSL00

2

T00C2

T00C3

T00C4

T00C5

3

T00C6

T00C7

T01C0

T01C1

4

RSL01

5

T01C2

T01C3

T01C4

T01C5

6

T01C6

T01C7

T02C0

T02C1

7

RSL02

8

T02C2

T02C3

T02C4

T02C5

9

T02C6

T02C7

T03C0

T03C1

10

RSL03

11

T03C2

T03C3

T03C4

T03C5

12

T03C6

T03C7


142


Timesl ot Numb er



2 and 3

4 and 5

6 and 7

... 31

OML0

Instances of the 2:1 Multiplexing Mode Assume that BTS0 is configured with one cell and four TRXs, the channels in the cell use default settings, and the multiplexing mode is 2:1. Table 10-38 lists the timeslot assignment on the Abis interface. Table 10-38 Timeslot assignment in 2:1 multiplexing mode Timesl ot Numb er


2 and 3

4 and 5

6 and 7

0

Synchronization

Synchronization

Synchronization

Synchronization

1

T00C2

T00C3

T00C4

T00C5

2

T00C6

T00C7

T01C0

T01C1

3

RSL01+RSL02

4

T01C2

T01C3

T01C4

T01C5

5

T01C6

T01C7

T02C0

T02C1

6

T02C2

T02C3

T02C4

T02C5

7

T02C6

T02C7

T03C0

T03C1

8

RSL03

9

T03C2

T03C3

T03C4

T03C5

10

T03C6

T03C7

11 ... 31

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OML0+RSL00


143



Instances of the 3:1 Multiplexing Mode Assume that BTS0 is configured with one cell and four TRXs, the channels in the cell use default settings, and the multiplexing mode is 3:1. Table 10-39 lists the timeslot assignment on the Abis interface. Table 10-39 Timeslot assignment in 3:1 multiplexing mode Timesl ot Numb er


2 and 3

4 and 5

6 and 7

0

Synchronization

Synchronization

Synchronization

Synchronization

1

T00C2

T00C3

T00C4

T00C5

2

T00C6

T00C7

T01C0

T01C1

3

T01C2

T01C3

T01C4

T01C5

4

T01C6

T01C7

T02C0

T02C1

5

RSL02+RSL03

7

T02C2

T02C3

T02C4

T02C5

9

T02C6

T02C7

T03C0

T03C1

11

T03C2

T03C3

T03C4

T03C5

12

T03C6

T03C7

13 ... 31

OML0+RSL00+RSL01

Instances of the 4:1 Multiplexing Mode Assume that BTS0 is configured with one cell and four TRXs, the channels in the cell use default settings, and the multiplexing mode is 4:1. Table 10-40 lists the timeslot assignment on the Abis interface. Table 10-40 Timeslot assignment in 4:1 multiplexing mode

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Timesl ot Numb er


2 and 3

4 and 5

6 and 7

0

Synchronization

Synchronization

Synchronization

Synchronization

1

T00C2

T00C3

T00C4

T00C5


144



Timesl ot Numb er


2 and 3

4 and 5

6 and 7

2

T00C6

T00C7

T01C0

T01C1

3

T01C2

T01C3

T01C4

T01C5

4

T01C6

T01C7

T02C0

T02C1

5

T02C2

T02C3

T02C4

T02C5

6

T02C6

T02C7

T03C0

T03C1

7

RSL03

8

T03C2

T03C3

T03C4

T03C5

9

T03C6

T03C7

10 ... 31

OML0+RSL00+RSL01+RSL02

Instances of the Physical 16 kbit/s Multiplexing Mode Table 10-41 lists the timeslot assignment on the Abis interface in the physical 16 kbit/s multiplexing mode. Table 10-41 Instances of the physical 16 kbit/s multiplexing mode Timesl ot Numb er


2 and 3

4 and 5

6 and 7

0

Synchronization

Synchronization

Synchronization

Synchronization

1

Traffic timeslot

Traffic timeslot

Traffic timeslot

Traffic timeslot

2

Signaling timeslot

Traffic timeslot

Signaling timeslot

Traffic timeslot

30

Signaling timeslot

Traffic timeslot

Signaling timeslot

Traffic timeslot

31

Signaling timeslot

Signaling timeslot

Signaling timeslot

Signaling timeslot

...

10.3.18 Timeslot Assignment on the Abis Interface This describes the principles and algorithm of timeslot assignment on the Abis interface. Issue 03 (2011-08-31)


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NOTE

l Physical 16 kbit/s multiplexing refers to the permanent assignment of a 16 kbit/s timeslot to a channel. The channel exclusively uses this 16 kbit/s timeslot. l Statistical multiplexing means that n channels use one 64 kbit/s timeslot. Each channel uses the 64 kbit/ s bandwidth in a different time slice, that is, Time Division Multiplexing (TDM). In statistical multiplexing mode, more than one channel is multiplexed onto one 64 kbit/s bandwidth. l DML: Dynamic Maintenance Link. During the loading of the BTS software, the software is loaded on the OML/EML, besides, the transmission resources allocated to the RSL or TCHs are dynamically preempted to establish the extended loading links to load the software simultaneously. In this way, the software loading is accelerated. After the software is successfully loaded, the extended links are released and the pre-empted transmission resources are reallocated to the TCHs or RSL. Then, the allocation of transmission resources on the Abis interface is restored.

Principles of Timeslot Assignment on the Abis Interface The principles of timeslot assignment on the Abis interface are as follows: l

The n:1 statistical multiplexing and physical 16 kbit/s multiplexing cannot coexist on one link.

l

The OMLs, RSLs, ESLs, idle timeslots, monitoring timeslots, and TCHs are assigned based on sub-timeslots.

l

In physical 16 kbit/s multiplexing mode, any of the OMLs, RSLs, idle timeslots, monitoring timeslots, and TCHs can coexist on one 64 kbit/s timeslot.

l

When using the n:1 64 kbit/s statistical multiplexing mode, adhere to the following principles: – The timeslots of different BTSs cannot be multiplexed onto one 64 kbit/s timeslot. – Traffic channels and signaling channels cannot be multiplexed onto one 64 kbit/s timeslot. – One 64 kbit/s timeslot must be used even if one signaling channel or traffic channel is configured. – Monitoring timeslots cannot share the same 64 kbit/s timeslot with other timeslots, except for the semipermanent connection. – In different E1s of cascaded BTSs, all the objects multiplexed onto one 64 kbit/s timeslot must stay in the same 64 kbit/s timeslot and the relative positions of their corresponding sub-timeslot numbers must remain the same. – The timeslots of different device groups in one BTS cannot be transmitted on the 64 kbit/s bandwidth of the same E1. – Idle timeslots and the timeslots on TRXs cannot use the same 64 kbit/s bandwidth with the semipermanent connection. – The number of OMLs for the GEIUB/GOIUB cannot exceed 384. – The number of RSLs for the GEIUB/GOIUB cannot exceed 384. – The number of OMLs for one GEHUB/GFGUB/GOGUB cannot exceed 384. – The number of RSLs for one GEHUB/GFGUB/GOGUB cannot exceed 384. – For details about specifications of other interface boards, refer to the maximum number of TRXs supported by each interface board.

l

Issue 03 (2011-08-31)

When BTSs, cells, TRXs, idle timeslots, or monitoring timeslots are added, timeslots on the Abis interface must be assigned. The resources on the Abis interface should be assigned to the following objects: OMLs, RSLs, traffic channels, idle timeslots, and monitoring timeslots. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

146



Algorithm of Timeslot Assignment on the Abis Interface The algorithm of timeslot assignment on the Abis interface is as follows: l

Each E1 port of the BTS manages sub-timeslots 0-255. Sub-timeslots 0-7 are used for synchronization. They cannot be assigned to any object.

l

The OML is assigned timeslot 31 on port 0 of the local BTS. In n:1 statistical multiplexing mode, the OML is assigned to sub-timeslot 0 of timeslot 31; in physical 16 kbit/s multiplexing mode, the OML is assigned to sub-timeslot 3 of timeslot 31.

l

Except for the incoming E1 timeslot, the E1 port directly connected to the BSC is selected preferentially during the timeslot assignment of the upper-level BTS.

l

Monitoring timeslots and idle timeslots can be assigned only on the ports of the basic cabinets in the basic cabinet groups.

l

Lower-level BTSs can be established only on the ports of the basic cabinets in the basic cabinet groups.

l

Before the OML between the BTS and the BSC is established, the BTS scans different timeslots and tries to establish the OML to the BSC. The number of BTS cascades is limited to reduce the link setup time.

10.3.19 Timeslot Arrangement on the Abis Interface During the operations involving timeslot assignment on the BSC6900 Local Maintenance Terminal, if timeslot assignment fails, you can run MML commands to arrange timeslots for the activated BTSs. Assume that there are two cascaded BTSs. Level 1 BTS uses timeslots 4-59, and level 2 BTS uses timeslots 68-127. Four idle timeslots of level 1 BTS are deleted, and timeslots 6, 7, 8, and 9 are released. A new TRX is added to level 2 BTS. The TRX carries six TCHs. Only two complete 64 kbit/s timeslots and two 32 kbit/s timeslots are available. The RSLs cannot be multiplexed onto the TCHs and the timeslots of different BTSs also cannot be multiplexed. Therefore, timeslot resources are insufficient. In this event, you run the MML command TID BTSABISTS to arrange timeslots. l

If the existing timeslot distribution meets the requirements for BSC arrangement, the BSC starts to arrange timeslots.

l

If the existing timeslot distribution does not meet the requirements for BSC arrangement, you need to add physical E1 links and run the MML command ADD BTSCONNECT to add the corresponding site chains on the LMT.

You can use the following methods to arrange timeslots to meet the requirement of the newly added TRX for timeslots. l

Arrange the timeslots of level 1 BTS. Move the services on timeslots 4 and 5 to timeslots 8 and 9. Therefore, an E1 contains three complete 64 kbit/s timeslots. There are sufficient timeslot resources to add a TRX.

l

The RSL of the added TRX can use timeslots 4, 5, 6, and 7. The remaining two complete 64 kbit/s timeslots can be assigned to six TCHs.

Table 10-42 shows the timeslot distribution on the Abis interface before timeslot arrangement by the BSC.

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Table 10-42 Timeslot distribution on the Abis interface before timeslot arrangement by the BSC Timeslot

Sub-Timeslot 0, 1

2, 3

4, 5

6, 7

0

Synchronization

Synchronization

Synchronization

Synchronization

1

Used by level 1 site


Idle

Idle

2

Idle

Idle



3





...

...

...

...

...

12





13





14

Idle

Idle

Idle

Idle

15

Idle

Idle

Idle

Idle

16





17





...

...

...

...

...

30





31





Table 10-43 shows the timeslot distribution on the Abis interface after timeslot arrangement by the BSC. Table 10-43 Timeslot distribution on the Abis interface after timeslot arrangement by the BSC Timeslot

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Sub-Timeslot 0, 1

2, 3

4, 5

6, 7

0

Synchronization

Synchronization

Synchronization

Synchronization

1

Idle

Idle

Idle

Idle


148


Timeslot


Sub-Timeslot 0, 1

2, 3

4, 5

6, 7

2





3





...

...

...

...

...

12





13





14

Idle

Idle

Idle

Idle

15

Idle

Idle

Idle

Idle

16





17





...

...

...

...

...

30





31





The process of timeslot arrangement by the BSC is as follows: l

The BSC releases all the timeslots that are used by the cascaded BTSs except for the timeslots assigned manually.

l

The BSC reassigns timeslots for each object.

l

If the reassignment of timeslots fails, a timeslot arrangement failure message is displayed.

l

The manual assignment of Abis timeslots does not involve timeslot arrangement.

l

If the timeslot arrangement fails, the timeslot distribution before the timeslot arrangement is restored.

10.3.20 Manual Timeslot Assignment on the Abis Interface This describes the manual timeslot assignment on the Abis interface. Timeslot assignment on the Abis interface is required when you add BTSs, cells, TRXs, idle timeslots, and monitoring timeslots. By default, the timeslots are assigned automatically. You can also manually assign the OML timeslots on the Abis interface if required. You can run the MML command SET BTSOMLTS to manually allocate OML timeslots or run the MML command SET BTSFORBIDTS to inhibit a timeslot segment. Issue 03 (2011-08-31)


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When manually assigning timeslots on the Abis interface, adhere to the following principles: l

The objects that support manual timeslot assignment are OMLs.

l

When BTSs are cascaded, only the OML timeslots for the current level BTS can be allocated manually.

l

The occupied source timeslots are cleared and then allocated again.

l

The multiplexing mode of assigned timeslots must be the same as the multiplexing mode of the BTS. If the BTS uses the 2:1 multiplexing mode, do not multiplex four signaling links together.

l

You can run the MML command CLR BTSMANUAL to clear the Abis timeslot resources manually set. When you change the assignment mode of the timeslots of an object from manual mode to auto mode, the timeslots are released and assigned automatically. When you change the assignment mode of the timeslots of an object from auto mode to manual mode, the Abis timeslots automatically assigned for the object are released.

When inhibiting timeslots, adhere to the following principles: l

After a timeslot segment is inhibited, the source timeslots are released and then allocated again. After the timeslot segment is uninhibited, the source timeslots do not return.

l

Timeslots allocated manually cannot be inhibited.

l

If a BTS is connected to a BSC directly and the timeslot segment on the BSC side is occupied semi-permanently, the timeslot segment cannot be prohibited.

10.3.21 Semipermanent Connection Semipermanent connection refers to the transmission channel comprised of some idle timeslots in the existing network. The semipermanent connection is used to transfer business hall information, alarm information about the BTS AC power supply, and other maintenance information. When the network operator needs to transmit some data from one terminal to another terminal and the data does not have a high requirement for the transmission bandwidth, the idle transmission resources in the GSM network can be specially used to transfer the data. Semipermanent connection is a transparent channel that can be used to transmit information specified by a subscriber. The BSC provides the semipermanent connection of four rates: 8 kbit/ s, 16 kbit/s, 32 kbit/s, and 64 kbit/s. There are two types of semipermanent links in the BSS system: l

Semipermanent connection Connection configured between interface boards.

l

Monitoring timeslot Connection configured between the interface board and the BTS. The rates of monitoring timeslots are 8 kbit/s, 16 kbit/s, 32 kbit/s, and 64 kbit/s. You can assign multiple monitoring timeslots for the BTSs on a link at a time.

10.3.22 Principles of Idle Timeslot Assignment This describes the principles of idle timeslot assignment. The idle timeslots carry the GPRS services in the BSS. The principles of idle timeslot assignment are as follows: Issue 03 (2011-08-31)


150



l

Idle timeslots are configured in the unit of BTS cabinet groups. Each BTS cabinet group can be added with a maximum of 128 idle timeslots at a time. A BTS can be configured with 512 idle timeslots.

l

You can run the MML command SET BTSIDLETS to configure the number of idle timeslots for a single BTS.

10.3.23 Configuration Guidelines for DFCU/DFCB The filter combiner unit for DTRU BTS is located in the DAFU subrack of the BTS3012 or BTS3012AE or BTS3012 II. The filter combiner unit features a lower combination loss, and therefore, can meet the requirements of large coverage and save antennas when large-scale BTSs are used. There are two types of filter combiner unit. One is DFCU with a built-in microband combiner, and the other is DFCB (B as the model) without a built-in microband combiner.

Configuration Rules of the Boards l

The DFCU can be used independently to provide the four-in-one output.

l

The DFCB is a dual two-in-one combiner that provides two outputs, namely, tributary A and tributary B corresponding to COM1 (output) and COM2 (output) of the DFCB. Each tributary can be used to combine the output of at most two TRXs. The DFCB cannot be used independently because it has no diversity receive channel. Therefore, it can be used only with the DFCU in cascading mode to support the S6 and S12 cell configurations.

l

The DFCU/DFCB must be configured in an even slot, such as slot 0, 2, or 4, in the DAFU subrack, namely, the even slots of the original DDPU. The odd slot next to the DFCU/ DFCB slot cannot be configured with any board. In other words, a DFCU/DFCB occupies two slots.

Configuration Rules of Antenna Feeder Connections in the DFCU l

The TRX to be tuned in the DFCU must be configured on downlink tributary A of the DFCU. Tributary B cannot be configured with TRXs.

l

In the antenna feeder connections of one DFCU, a maximum of four TRXs can be configured.

l

In the antenna feeder connections of the DFCU, none of the TRXs can be configured with RF FH.

l

In the antenna feeder connections of the DFCU, the spacing between any two TRXs must be at least three frequencies.

l

In the antenna feeder connections of the DFCU, the transmit mode of any TRX cannot be set to wideband combination. By default, the transmit mode is set to transmit independency.

l

When the DFCU uses six-in-one output mode, it must work with the DFCB. You need to configure the extended connection relation for the DFCU to describe how the DFCB is cascaded to the DFCU. The DFCB provides dual two-in-one outputs.

Configuration Rules of Antenna Feeder Connections in the DFCB l

A TRX is connected to tributary A or B of the DFCB based on actual conditions.

l

Both tributary A and tributary B of the DFCB can be configured with a maximum of two TRXs.

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l

The spacing between the two TRXs in both tributaries A and B must be at least three frequencies. The frequency spacing between tributary A and tributary B has no restriction because the two tributaries are independent of each other.

l

In the antenna feeder connections of the DFCB, none of the TRXs can be configured with RF FH.

l

In the antenna feeder connections of the DFCB, the transmit mode of any TRX cannot be set to wideband combination.

l

The DFCB does not require extension connections. The extension connections are configured on the DFCU.

10.3.24 Configuration Guidelines for Upgrading Cabinets from Version 8.x to Version 9.0 This section describes the configuration rules of upgrading cabinets from an 8.x version to the 9.0 version. The components involved in the upgrade are the BBU subrack, RF subrack, and monitoring boards.

Configuration Rules of Upgrading the BBU Subrack You need to determine the type of cabinet 0 according to the BTS type during the upgrade, because the BBU is always installed in cabinet 0. DBS3900/BTS3900A Table 10-44 Configuration rules of upgrading the BBU subrack If Cabinet 0 Has...

Then, Modify the Type of Cabinet 0 to...

DPMU

PS4890

Local APMU and its type is APM4815

OMB

Local APMU and its type is APM30

APM30

Local DTCU

TMC

Other boards

Virtual

BTS3900 During the RFU upgrade, if the type of cabinet 0 is BTS3900, you do not need to modify the cabinet type. The cabinet numbers, subrack numbers, and slots numbers for the boards in the BBU do not need to be changed, but the UBFA board needs to be renamed FAN.

Configuration Rules of Upgrading the RF Subrack Upgrade of the RFU An RFU may be upgraded in the following two conditions: upgrading a BTS of version 8.x that does not support the filler panel to a BTS of version 9.0, or upgrading a BTS of version 8.x that supports the filler panel to a BTS of version 9.0. Issue 03 (2011-08-31)


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l


Upgrading a BTS of version 8.x that does not support the filler panel to a BTS of version 9.0 Table 10-45 Configuration rules of upgrading the RFU (not supporting the filler panel)

l

If the Type of BTS Is...

Cabinet, Subrack, Slot Numbers Before Upgrade Are...

Cabinet, Subrack, Slot Numbers After Upgrade Are...

Then, Modify the Type of Cabinet 0 to...

BTS3900

[Cabinet X, Subrack 3, Slot Y]


BTS3900

BTS3900A


[Cabinet X+1, Subrack 4, Slot Y]

RFC-6 or add an RFC-6 cabinet

Upgrading a BTS of version 8.x that supports the filler panel to a BTS of version 9.0 Table 10-46 Configuration rules of upgrading the RFU (supporting the filler panel)

Issue 03 (2011-08-31)

Numbe r of Cabine ts

BTS Model

CPRI Cascad ing

CPRI Port Numbe r Before Upgrad e

Numbe r of Cascad ing Levels on CPRI Chain Before Upgrad e

Cabine t Numbe r After Upgrad e

Subrac k Numbe r After Upgrad e

Slot Numbe r After Upgrad e

1

BTS390 0

CPRI ports connect ed in the star topolog y

N (0 <= N <= 5)

0

0

4

N

1

BTS390 0A

CPRI ports connect ed in the star topolog y

N (0 <= N <= 5)

0

1

4

N


153



Numbe r of Cabine ts

BTS Model

CPRI Cascad ing

CPRI Port Numbe r Before Upgrad e

Numbe r of Cascad ing Levels on CPRI Chain Before Upgrad e

Cabine t Numbe r After Upgrad e

Subrac k Numbe r After Upgrad e

Slot Numbe r After Upgrad e

2

BTS390 0

CPRI ports at two levels of cascadin g

N (0 <= N <= 5)

H (0 <= H <= 1)

N%2

4

INT(N/ 2) * 2 + H

2

BTS390 0A

CPRI ports at two levels of cascadin g

N (0 <= N <= 5)

H (0 <= H <= 1)

N%2+ 1

4

INT(N/ 2) * 2 + H

3

BTS390 0

CPRI ports at three levels of cascadin g

N (0 <= N <= 5)

H (0 <= H <= 2)

N/2

4

(N % 2) *3+H

3

BTS390 0A

CPRI ports at three levels of cascadin g

N (0 <= N <= 5)

H (0 <= H <= 2)

N/2 + 1

4

(N % 2) *3+H

Upgrade of the RRU Table 10-47 Configuration rules of upgrading the RRU

Issue 03 (2011-08-31)

If the BTS is...

Then...

Remarks

GU dual-mode base station

Number of the RRU subrack = HOP x 6 + (PORT - 3) + 60, where 0 <= HOP <= 2, 0 <= PORT <= 5, and both the cabinet number and cabinet number are 0.

If the ADD BTSSFPMODE command can be executed, the current BTS is a GU dual-mode base station.


154



If the BTS is...

Then...

Remarks

Other conditions

Number of the RRU subrack = SLOT x 20 + HOP x 6 + PORT + 60, (GSM) SLOT = 0, 0 <= HOP <= 2, 0 <= PORT <= 5, and both the cabinet number and cabinet number are 0.

Configuration Rules for Upgrading the Monitoring Boards When running MML commands to configure monitoring boards, the following parameters need to be specified: the cabinet number of the management object (MCN), the subrack number of the management object (MSRN), the slot number of the management object (MSN), the number of the port to which the management object connects (MPN), and the IP address of the monitoring board (MADDRESS). Regarding a local board, the management objects refer to the cabinet, subrack, and slots of the BBU. The following table provides the MADDRESS after upgrading the monitoring boards. Table 10-48 IP addresses of the monitoring boards Monitoring Board

Communication Address

EMU

2

PMU

3, 4

TCU

7, 6

FMU

14, 15

GATM

22

TCU (dedicated for the BBC)

23, 24, 25, 26

The following table provides the configuration rules of upgrading the monitoring boards from a 8.x version to the 9.0 version.

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Table 10-49 Configuration rules for upgrading the monitoring boards Monitoring Board

Description

Remarks

DEMU

l If only one DEMU is used, the cabinet number, subrack number, and slot number of the DEMU are changed into 0, 40, and 0 respectively. If two DEMUs are used, the cabinet number, subrack number, and slot number of the other DEMU are changed into 0, 41, and 0 respectively.

One BTS has at most two DEMUs.

l The DEMU is renamed EMU. l You need to modify the parameters of the EMU and add the information about the management objects. GATM

l If only one GATM is used, the cabinet number, subrack number, and slot number of the GATM are changed into 0, 50, and 0 respectively. If two GATMs are used, the cabinet number, subrack number, and slot number of the other GATM are changed into 0, 51, and 0 respectively.

One BTS has at most two GATMs.

l You need to modify the parameters of the GATM and add the relation information of the management object.

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Monitoring Board

Description

Remarks

Local DPMU/APMU

l If only one DPMU/ APMU is used, the cabinet number, subrack number, and slot number of the DPMU/APMU are changed into 0, 7, and 0 respectively.

l You can determine whether a DPMU/APMU is a local one according to its original cabinet number, subrack number, and slot number. If the original subrack number is 2, the DPMU/APMU is a local one. If the original subrack number is 5, the DPMU/APMU is a remote one.

l If two DPMUs/APMUs are used, the cabinet number, subrack number, and slot number of the odd-numbered DPMU/ APMU are changed into 0, 7, and 0 respectively. The other DPMU/APMU is upgraded as follows: – If the BTS model is BTS3900 and the type of cabinet 1 is BTS3900, then the cabinet number, subrack number, and slot number of the other DPMU/APMU are changed into 1, 7, and 0 respectively.

l If there is a DPMU/ APMU in cabinet 0, subrack 2, and slot 4 or in cabinet 0, subrack 2, and slot 5, you need to remove it first. l After the DPMU is renamed, you need to set APMUBRDTYPE to PS4890.

– If the BTS model is BTS3900 and cabinet 1 does not exist, then add cabinet 5, and change the cabinet number, subrack number, and slot number of the other DPMU/APMU into 5, 7, and 0 respectively. Regarding the added number five cabinet, if the other DPMU/ APMU is DPMU, then the cabinet type is PS4890; if the other DPMU/APMU is APM30, then the cabinet type is APM30; if the other DPMU/APMU is APM4815, then the cabinet type is OMB.

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Monitoring Board

Description

Remarks

l The DPMU/APMU is renamed PMU. l You need to modify the parameters of the PMU and add the relation information of the management object.

The following is an example: View the settings of the PMU and determine how many PSUs are configured. Assume that three PSUs are configured in PMU0 by running the following command: SET BTSAPMUBP: IDTYPE=BYID, BTSID=1000, CN=0, SRN=7, SN=0, CFGFLAG=YES, APMUBRDTYPE=APM30, PSU0=YES, PSU1=YES, PSU2=YES. After the PMU0 is added, three PSUs are added. In the 9.0 version, the PSU is treated as a board, and therefore you need to add a PSU in the same way as adding a board. The MML command for adding a PSU is as follows: ADD BTSBRD: IDTYPE=BYID, BTSID=1000, CN=0, SRN=7, SN=1, BT=PSU. In this command, the CN and SRN are the same as those of the PMU0, and the SN is numbered from 1 in ascending order.

10.4 Data Configuration Guidelines for Specifications This document describes the specifications of the BSC6900. Table 10-50 lists the specifications of the BSC6900. Table 10-50 BSC6900 specifications

Issue 03 (2011-08-31)

Item

Specification

Maximum Number of TRXs

4096

Maximum Number of GSM Cells

2048

Maximum Number of External Neighboring GSM Cells

10240

Maximum Number of External Neighboring UMTS Cells

10240

Number of SS7 Links

64

Number of 2 Mbit/s SS7 Links

32

Maximum Number of Internal Neighboring GSM Cells Supported by a GSM Cell

64

Maximum Number of External Neighboring GSM Cells Supported by a GSM Cell

64

Maximum Number of External Neighboring UMTS Cells Supported by a GSM Cell

64


158


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Item

Specification

Number of OSPs Supported by a BSC

4

Number of DSPs

187

Maximum Number of MTP3 (MTP3 & MTP3b) Link Sets

187

Maximum Number of MTP (MTP3 & MTP3b) Links Supported by an MTP Link Set

16

Maximum Number of MTP Links

2992

Maximum Number of MTP Routes

374

Maximum Number of MTP3 Links Supported by a CPUS

50

Maximum Number of SCTP Links Supported by a CPUS

15

Maximum Number of M3UA Links Supported by a CPUS

15

Maximum Number of M3UA Link Sets

187

Maximum Number of M3UA Links

1024

Maximum Number of M3UA Destination Entities

187

Maximum Number of M3UA Local Entities

187

Number of M3UA Routes

366

Maximum Number of STPs

32

Maximum Number of AAL2 Paths

13000

Maximum Number of IP Paths

13000

Maximum Number of AAL2 Paths and IP Paths

13000

Maximum Number of Signaling Links over Ater Interface

64

Maximum Number of OM Links over Ater Interface

2

Maximum Number of Signaling Links over Ater Interface Supported by a TC

64

Maximum Number of Signaling Links over Pb Interface

256

Total Number of Routes

4096

Number of Routes on FG2c/GOUc

512


159

BSC6900 GSM Initial Configuration Guide(V900R013C00_03)(PDF)-En

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