Network Impact Report(GBSS17.0_Draft a)

GSM BSS GBSS17.0

Network Impact Report Issue

Draft A

Date

2014-07-30

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2014. 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 a 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 Draft A (2014-07-30)

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

i

GSM BSS Network Impact Report

About This Document

About This Document Purpose This document describes the impact of new and enhanced features in GBSS17.0 on GBSS16.0 networks. It helps customers plan the introduction of GBSS17.0 products and features at an early stage. This document is for your reference only, and is subject to changes during product development. Part of the information may be incomplete or unavailable until General Availability (GA) of GBSS17.0. Huawei GBSS17.0 supports multiple upgrade paths. Depending on the source version, network impact reports on the GBSS versions in the live network also need to be used with this document. The network impact reports include: l

GBSS15.0 Network Impact Report

l


The operations support system (OSS) has a separate network impact report. For details, see iManager U2000 V200R015 Network Impact Report.

NOTICE This document only outlines the impact of new and enhanced features in GBSS17.0 on GBSS16.0 networks, without providing guidelines for specific software upgrades. Before formulating a specific upgrade plan, contact Huawei engineers to obtain release notes for specific BSC, BTS, and OSS versions. The release notes incorporate software changes and their impacts.

Intended Audience This document is intended for: l

Network planning engineers

l

System engineers

l

Network operators



ii


About This Document

Change History Changes between document issues are cumulative. The latest document issue contains all the changes made in earlier issues.

Draft A (2014-07-30) This is a new document for GBSS17.0.



iii


Contents

Contents About This Document.....................................................................................................................ii 1 General Impacts.............................................................................................................................1 1.1 NEs Involved..................................................................................................................................................................2 1.2 System Capacity and Network Performance..................................................................................................................2 1.2.1 System Capacity..........................................................................................................................................................2 1.2.2 Network Performance..................................................................................................................................................2 1.3 Hardware........................................................................................................................................................................2 1.4 Implementation...............................................................................................................................................................3 1.5 License............................................................................................................................................................................4 1.6 Inter-NE Interfaces.........................................................................................................................................................4 1.7 Operation and Maintenance............................................................................................................................................4 1.8 Other NEs.......................................................................................................................................................................4

2 Summary of Feature Impacts.......................................................................................................5 3 Impacts of GBSS17.0 Features on GBSS16.0 Networks.........................................................6 3.1 GBFD-110008 GBSS17.0 System Improvement (Bacis/Optional)...............................................................................7 3.1.1 Feature Description......................................................................................................................................................7 3.1.2 System Capacity and Network Performance...............................................................................................................7 3.1.3 NEs..............................................................................................................................................................................7 3.1.4 Hardware.....................................................................................................................................................................8 3.1.5 Inter-NE Interfaces......................................................................................................................................................8 3.1.6 Operation and Maintenance.........................................................................................................................................8 3.1.7 Related Features..........................................................................................................................................................8 3.2 GBFD-170101 Abis Self-planning(New/Basic).............................................................................................................8 3.2.1 Feature Description......................................................................................................................................................8 3.2.2 System Capacity and Network Performance...............................................................................................................9 3.2.3 NEs..............................................................................................................................................................................9 3.2.4 Hardware.....................................................................................................................................................................9 3.2.5 Inter-NE Interfaces......................................................................................................................................................9 3.2.6 Operation and Maintenance.......................................................................................................................................10 3.2.7 Related Features........................................................................................................................................................14 3.3 MRFD-211601 Multi-mode BS Common Reference Clock(GBTS) (Enhanced/Optional)........................................14 Issue Draft A (2014-07-30)


iv


Contents

3.3.1 Feature Description....................................................................................................................................................14 3.3.1.1 GBTS and NodeB Common Reference Clock.......................................................................................................14 3.3.1.2 GBTS and eNodeB Common Reference Clock.....................................................................................................16 3.3.1.3 GBTS, NodeB and eNodeB Common Reference Clock........................................................................................17 3.3.2 System Capacity and Network Performance.............................................................................................................18 3.3.3 NEs............................................................................................................................................................................18 3.3.4 Hardware...................................................................................................................................................................18 3.3.5 Inter-NE Interfaces....................................................................................................................................................18 3.3.6 Operation and Maintenance.......................................................................................................................................18 3.3.7 Related Features........................................................................................................................................................18

4 Glossary.........................................................................................................................................20 5 Reference Documents.................................................................................................................21



v


1 General Impacts

1

General Impacts

This chapter describes the general impact of GBSS17.0 on the network compared with that of GBSS16.0. For details about the impact of a new or enhanced feature on other NEs, see the descriptions about the feature in 3 Impacts of GBSS17.0 Features on GBSS16.0 Networks.



1


1 General Impacts

1.1 NEs Involved Table 1-1 lists the network elements (NEs) and their software versions involved in GBSS17.0. Table 1-1 NEs and software versions in GBSS17.0 NE

Software Version

BSC

l BSC6900 GSM V900R017C00 l BSC6910 GSM V100R017C00

BTS

The version of 3900 series base stations is: GBTS/eGBTS: BTS3000 V100R017C00

U2000

iManager U2000 V200R015C00

CME

iManager U2000-CME V200R015C00

1.2 System Capacity and Network Performance 1.2.1 System Capacity None

1.2.2 Network Performance None

1.3 Hardware BSC None

BTS Table 1-2 describes the hardware added for the BTS. Table 1-2 New BTS hardware Hardware

Logical Function

Remarks

BBU3910A

BBU3910A subrack

BBU3910A is a blade BBU module, including the modular mechanical parts and manufactured boards.



2


1 General Impacts

Hardware

Logical Function

Remarks

UMDU

Multimode digital unit

The universal multimode digital unit (UMDU) is a manufactured board of the blade BBU (BBU3910A). It consists of the main control unit and baseband processing unit for the BTS.

RRU3953

Multimode RF module

Frequency band: 1800 MHz Instantaneous bandwidth (IBW): 45 Mbit Network mode: GO, LO, and GL Transmit power: 2 x 60 W Numbers of TX and RX channels: 2T4R

RRU3953w

Multimode RF module

Frequency band: 1800 MHz IBW: 75 Mbit Network mode: GO, LO, and GL Transmit power: 2 x 60 W Numbers of TX and RX channels: 2T4R

RRU3959

Multimode RF module

Frequency band: 1800 MHz Network mode: GO, LO, and GL Transmit power: 2 x 60 W Numbers of TX and RX channels: 2T2R Frequency band: 900 MHz Network mode: GO, UO, LO GU, GL, UL, and GUL Transmit power: 2 x 60 W Numbers of TX and RX channels: 2T2R

OSS None

1.4 Implementation Upgrade Paths GBSS17.0 supports two upgrade paths: l

Upgrade from GBSS15.0 to GBSS17.0

l

Upgrade from GBSS16.0 to GBSS17.0

GBSS14.0 and earlier versions must be upgraded to GBSS15.0 and then to GBSS17.0.



3


1 General Impacts

Upgrade Procedure To upgrade a GBSS to GBSS17.0, perform the following steps: 1.

Upgrade the U2000.

2.

Upgrade the CME.

3.

Upgrade the BSC.

4.

Upgrade the BTS.

For details about the target version of each NE, see Table 1-1.

1.5 License BSC None

BTS None

OSS For details about the changes in OSS licenses, see iManager U2000 V200R015 Network Impact Report.

1.6 Inter-NE Interfaces For details about changes in the northbound interface (NBI) mechanism, see iManager U2000 V200R015 Network Impact Report. The inter-NE interfaces of other NEs have no changes.

1.7 Operation and Maintenance Due to new and enhanced features as well as internal optimization, GBSS17.0 incorporates changes in the operation and maintenance (O&M) information, including MML commands and parameters, performance counters, alarms, and events compared with GBSS16.0. The overall changes in O&M for the BSC and BTS are closely related to the software version used at the site. To obtain detailed O&M change information in GBSS17.0, see the version document corresponding to the specific BSC or BTS version.

1.8 Other NEs None



4


2 Summary of Feature Impacts

2

Summary of Feature Impacts

This chapter describes the impact of new and enhanced features in GBSS17.0 on GBSS16.0 networks. Feature impacts are categorized as "Major" when either of the following conditions is met: l

The feature requires new or additional hardware.

l

The feature has an impact on GBSS16.0 features or other NEs.

Impacts of all other types are categorized as "Minor." Table 2-1 lists the impacts of new and enhanced features in GBSS17.0. Table 2-1 Impacts of new and enhanced features in GBSS17.0 Feature ID

Feature Name

Impact Severity

New or Enhanced/ Basic or Optional

GBFD-110008

GBSS17.0 System Improvement

Major

New/Basic

GBFD-170101

Abis Self-planning

Major

New/Basic

MRFD-211601

Multi-mode BS Common Reference Clock(GBTS)

Minor

Enhanced/ Optional



5


3

3 Impacts of GBSS17.0 Features on GBSS16.0 Networks

Impacts of GBSS17.0 Features on GBSS16.0 Networks This chapter describes the impact of new and enhanced features in GBSS17.0 on GBSS16.0 networks.



6



3.1 GBFD-110008 GBSS17.0 System Improvement (Bacis/ Optional) 3.1.1 Feature Description Availability This feature is introduced in GBSS17.0.

Summary This feature describes system capability enhancements in GBSS17.0, including the enhancements in BSC6900 and BSC6910 reliability.

Benefits The function of preventing a large number of simultaneous location update messages from flooding the core network, the online FMA enhancement, and the CBC flow control are added to efficiently improve equipment reliability and ensure equipment operating security.

Description The GBSS17.0 System Improvement feature is described as follows: l

Prevents a large number of simultaneous location update messages from flooding the core network.

l

Improves the fault diagnosis capability of the online FMA to increase the fault diagnosis efficiency.

l

Adds flow control over CBC messages to prevent impacts of a large number of CBC messages on services.

Enhancement None

3.1.2 System Capacity and Network Performance System Capacity See 1.2.1 System Capacity.

Network Performance See 1.2.2 Network Performance.

3.1.3 NEs This feature is implemented on the BTS and BSC. Issue Draft A (2014-07-30)


7



3.1.4 Hardware See 1.3 Hardware.

3.1.5 Inter-NE Interfaces See 1.6 Inter-NE Interfaces.

3.1.6 Operation and Maintenance License This feature is not under license control.

Configuration Management No impact.

Performance Management No impact.

Fault Management No impact.

3.1.7 Related Features No impact.

3.2 GBFD-170101 Abis Self-planning(New/Basic) 3.2.1 Feature Description Availability This feature is available from GBSS17.0.

Summary With Abis Self-planning, the control plane on the Abis interface supports self-configuration in end point mode when the BSC and GBTS(UMPT) are interconnected. The BSC, serving as the SCTP server, does not need the planning or configuration of the SCTP link. The GBTS(UMPT), serving as the SCTP client, initiates an SCTP link establishment request. After an SCTP link is established, it is associated with the upper-layer signaling. This simplifies the configurations of the Abis interface. Issue Draft A (2014-07-30)


8



Benefits l

This feature simplifies the control-plane data configuration of the BSC, and therefore reduces the network maintenance cost and total cost of operation (TCO).

l

In SingleRAN scenarios, this feature provides unified OM experience on the control plane.

Description With this feature, the control plane on the Abis interface uses self-configuration in end point mode on the BSC side when the Abis interface uses IP transmission. In this case, only the SCTP server data needs to be configured on the BSC, and SCTP link data and upper-layer signaling data associated with the SCTP link do not need to be configured on the BSC. During deployment, the GBTS(UMPT) obtains the IP address and port number of the SCTP server either from the U2000 or by manual configuration and then initiates an SCTP negotiation procedure. After an SCTP link is established, the GBTS(UMPT) sends its identity information to the SCTP server. The SCTP server parses this information and then maps the SCTP link onto the upper-layer signaling.

Enhancement None

3.2.2 System Capacity and Network Performance System Capacity No impact.

Network Performance This feature has the following impact on network performance: l

When an eGBTS accesses the network and tries to establish a signaling link for the first time, establishing a signaling link in end point mode takes about 5s to 10s more than that in link mode. However, time required for establishing a signaling link in end point mode is the same as that in link mode after an eGBTS is reset.

l

After a signaling link is automatically established, if the local SCTP IP address or port number is modified on the eGBTS, the system automatically establishes a new signaling link instead of modifying the established signaling link.

3.2.3 NEs This feature is implemented on the BSC and eGBTS.

3.2.4 Hardware No impact.

3.2.5 Inter-NE Interfaces This feature adds a new IE to the Huawei proprietary Abis message eGBTS CPBearer Set Info. The new IE is used by the eGBTS to report its identity to the BSC. Issue Draft A (2014-07-30)


9



3.2.6 Operation and Maintenance License This feature is not under license control.

Configuration Management The MML commands in the following table have been introduced on the BSC side to accommodate this feature. Change Type

Command

NE

Description

New

ADD SCTPSRV

BSC6900

Use this command to add a service listening port to the SCTP server for signaling plane self-planning.

BSC6910 New

MOD SCTPSRV

BSC6900 BSC6910

New

RMV SCTPSRV

BSC6900 BSC6910

New

LST SCTPSRV

BSC6900 BSC6910

New

ADD SCTPPROF

BSC6900 BSC6910

New

MOD SCTPPROF

BSC6900 BSC6910

New

RMV SCTPPROF

BSC6900 BSC6910

New

LST SCTPPROF

BSC6900 BSC6910

New


SET SCTPSRVCTRL

BSC6900 BSC6910

Use this command to modify information about a service listening port on an SCTP server for signaling plane self-planning. Use this command to remove a service listening port on an SCTP server for signaling plane selfplanning. Use this command to query information about a service listening port on an SCTP server for signaling plane self-planning. Use this command to add an SCTP profile. Use this command to modify information in an SCTP profile. Use this command to remove an SCTP profile. Use this command to query information in an SCTP profile. Use this command to configure the binding relationship between a signaling subsystem and a link to an SCTP server for signaling plane selfplanning.


10



Change Type

Command

NE

Description

New

DSP SCTPSRVFILTER

BSC6900

Use this command to query the blacklist of an SCTP server for signaling self-planning.

CLR SCTPSRVFILTER

BSC6900

New

BSC6910

BSC6910

Use this command to remove the blacklist configured for an SCTP server for signaling plane selfplanning.

NOTE

Parameters in the new MML commands are not listed in the following table.

The following parameters have been introduced or modified on the BSC side to accommodate this feature. Change Type

Parameter ID

MML Command

NE

Description

New

SCTPSPAGI NGTIME (BSC6900, BSC6910)

SET TNSOFTPA RA

BSC6900

Aging period for a listening association for signaling plane self-planning.

SCTPSPPU NISHTIME (BSC6900, BSC6910)

SET TNSOFTPA RA

BSC6900

SCTPSPFIL TERTIME (BSC6900, BSC6910)

SET TNSOFTPA RA

BSC6900

SCTPSPUPT HRD (BSC6900, BSC6910)

SET TNSOFTPA RA

BSC6900

New

New

New


BSC6910

BSC6910

BSC6910

BSC6910


Penalty period for a listening association for signaling plane self-planning. Within the penalty period, the peer end cannot reconnect to the server. If this parameter is set to 0, the penalty is not implemented. Blacklist period for a listening association for signaling plane self-planning. Within the blacklist period, the peer end cannot reconnect to the server. If this parameter is set to 0, the blacklist filtering function is not performed. Threshold for the number of temporary associations that are set up between a remote port and the local SCTP listening port for signaling plane self-planning.

11



Change Type

Parameter ID

MML Command

NE

Description

New

SCTPSPFCT HRD (BSC6900, BSC6910)

SET TNSOFTPA RA

BSC6900

Threshold for signaling plane self-planning flow control. The number of admitted SCTP packets over an SCTP listening port on the signaling subsystem every second cannot exceed this threshold.

SCTPSPPSF CTHRD (BSC6900, BSC6910)

SET TNSOFTPA RA

BSC6900

SCTPSRVFI LTERINDE X

CLR SCTPSRVFI LTER

BSC6900

SignalCreate Type (BSC6900, BSC6910)

ADD BTS

BSC6900

MOD BTS

BSC6910

SpecifyLOC PNFlag (BSC6900, BSC6910)

ADD SCTPLNK

BSC6900

New

New

New

New


BSC6910

BSC6910

BSC6910

BSC6910

MOD SCTPLNK


Threshold for admitted abnormal packet flow control for signaling plane self-planning. The number of admitted abnormal SCTP packets over an SCTP listening port on the signaling subsystem every second cannot exceed this threshold. Index of an SCTP server filter table, which uniquely identifies a cell in the SCTP server filter table. Method for creating the eGBTS signaling plane. When this parameter is set to USER_CREATE, the eGBTS signaling plane, that is, ABISCP, and SCTP links carrying the ABISCP, are created manually. When this parameter is set to SYS_CREATE, the Abis Selfplanning feature takes effect, and the system automatically generates the ABISCP and SCTPLNK instances of the eGBTS. Whether to specify a local port when an SCTP link works as the SCTP server. This parameter does not need to be specified.

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Change Type

Parameter ID

MML Command

NE

Description

Modifie d

LOCPN (BSC6900, BSC6910)

ADD SCTPLNK

BSC6900

l Before the change: When the MODE (BSC6900,BSC6910) parameter is set to CLIENT, this parameter must be specified.

BSC6910

MOD SCTPLNK

l After the change: When the MODE (BSC6900,BSC6910) parameter is set to CLIENT and the SpecifyLOCPNFlag (BSC6900,BSC6910) parameter is set to YES, this parameter must be specified. Modifie d

LNKT

DSP INTERWK

BSC6900 BSC6910

The value SCTPSRV is added for this parameter.

Performance Management No impact.

Fault Management The following alarms have been introduced on the BSC side to accommodate this feature. Change Type

Alarm/Event Name

NE

Description

New

ALM-22244 Configuration Between Related NE Dismatch

BSC6900

The BSC determines the eGBTS object by matching the base station name reported by the eGBTS over the Abis interface with the base station name configured on the BSC. This alarm is reported when the base station name matching fails.

BSC6910

This alarm is cleared 5 minutes after the base station name matching succeeds.



13



Change Type

Alarm/Event Name

NE

Description

New

ALM-21831

BSC6900

BTS Signal Interface Create Fail

BSC6910

This alarm is generated when the system fails to generate the ABISCP data of the BTS in either of the following conditions: (1) SCTP link configurations conflict with each other or SCTP resources are insufficient. (2) Abis interface resources are insufficient.

The function of tracing SCTP based on SCTPSRVID(BSC6900,BSC6910) and the peer IP address is added to the LMT for this feature.

3.2.7 Related Features Prerequisite Features This feature applies only to the Abis interface between the BSC and eGBTS and requires that the Abis interface use IP transmission. Therefore, this feature depends on the following feature: l

GBFD-118601 Abis over IP or GBFD-118611 Abis IP over E1/T1

Mutually Exclusive Features None

Impacted Features None

3.3 MRFD-211601 Multi-mode BS Common Reference Clock(GBTS) (Enhanced/Optional) 3.3.1 Feature Description Availability This feature is available from SRAN3.0.

3.3.1.1 GBTS and NodeB Common Reference Clock This scenario is available from SRAN3.0. Issue Draft A (2014-07-30)


14



Summary From SRAN3.0, Huawei multimode base stations provide common reference clock for GSM and UMTS that share one BBU.

Benefits This feature provides common reference clock for GSM and UMTS that share one BBU, thereby saving the CAPEX and OPEX.

Description This feature supports the following application scenarios: l

Common GPS reference clock Common GPS reference clock requires only one set of external equipment and one set of feeder and antenna for a GU dual-mode base station, which reduces the installation costs and deployment costs.

l

Common BITS reference clock Common BITS reference clock requires only one set of external equipment for a GU dualmode base station, which saves the costs.

l

Common E1/T1 reference clock from Abis interface When the Abis interface is based on TDM over E1/T1 and the Iub interface is based on IP over FE/GE, the WMPT can obtain the reference clock from the clock synchronized from the Abis E1/T1 in the GTMU. The clock server is not necessary for UMTS and the cost is saved accordingly.

l

Common E1/T1 reference clock from Iub interface When common E1/T1 reference clock from Iub interface is used, the GTMU can obtain the reference clock from the clock synchronized from the Iub E1/T1 in the WMPT or UMPT_U. The clock server is not necessary for GSM and the cost is saved accordingly.

Enhancement l

SRAN5.0: – Common Ethernet reference clock from Iub interface When common Ethernet reference clock is used, GSM can obtain the reference clock via the BBU backplane from the WMPT or UTRP. – Common IP network 1588V2 reference clock from Iub interface When GSM and UMTS support the 1588V2 reference clock, only one 1588V2 clock server and client are required. GSM can obtain the reference clock via the BBU backplane from the WMPT or UTRP.

l

SRAN10.0: Common IP network 1588V2 reference clock for time synchronization from Iub interface When GSM and UMTS support the 1588V2 reference clock for time synchronization, only one 1588V2 clock server and one 1588V2 clock client are required. GSM can obtain the reference clock for time synchronization via the BBU backplane from the UMPT.



15



3.3.1.2 GBTS and eNodeB Common Reference Clock This scenario is available from SRAN5.0.

Summary From SRAN5.0, Huawei multimode base stations provide common reference clock for GSM and LTE that share one BBU.

Benefits This feature provides common reference clock for GSM and LTE that share one BBU, thereby saving the CAPEX and OPEX.


Common GPS reference clock Common GPS reference clock requires only one set of external equipment and one set of feeder and antenna for a GL dual-mode base station, which reduces the installation costs and deployment costs.

l

Common BITS reference clock Common BITS reference clock requires only one set of external equipment for a GL dualmode base station, which saves costs.

l

Common E1/T1 reference clock from Abis interface When the Abis interface is based on TDM over E1/T1 and S1 interface is based on IP over FE/GE, the LMPT/UMPT can obtain the reference clock from the clock synchronized from the Abis E1/T1 in the GTMU. The clock server is not necessary for LTE and the cost is saved accordingly.

l

Common E1/T1 reference clock from S1 interface When GSM and LTE share the same transmission interface based on IP over E1/T1 or hybrid transmission based on IP, the GTMU can obtain the reference clock from the clock synchronized from the S1 E1/T1 in the UTRP for LTE mode. The clock server is not necessary for GSM and the cost is saved accordingly.

l

Common Ethernet reference clock from S1 interface When common Ethernet reference clock is used, GSM can obtain the reference clock via the BBU backplane from the LTE main control board LMPT/UMPT or UTRP.

l

Common IP network 1588V2 reference clock from S1 interface When GSM and LTE BTS support the 1588V2 reference clock, only one 1588V2 clock server and client are required. GSM can obtain the reference clock via the BBU backplane from the LTE main control board LMPT/UMPT.

Enhancement l

SRAN10.0: Common IP network 1588V2 reference clock for time synchronization from S1 interface When GSM and LTE support the 1588V2 reference clock for time synchronization, only one 1588V2 clock server and one 1588V2 clock client are required. GSM can obtain the



16



reference clock for time synchronization via the BBU backplane from the LMPT or UMPT_L.

3.3.1.3 GBTS, NodeB and eNodeB Common Reference Clock This scenario is available from SRAN7.0.

Summary From SRAN7.0, Huawei multimode base stations provide common reference clock for GSM, UMTS, and LTE when the BBUs are interconnected.

Benefits This feature provides common reference clock for GSM, UMTS, and LTE when the BBUs are interconnected, thereby saving the CAPEX and OPEX.


Common GPS reference clock Common GPS reference clock requires only one set of external equipment and one set of feeder and antenna for a GUL multimode base station, which reduces the installation costs and deployment costs.

l

Common BITS reference clock Common BITS reference clock requires only one set of external equipment a GUL multimode base station, which saves the costs.

l

Common E1/T1 reference clock from Abis/Iub interface When the Abis or Iub interface is based on TDM over E1/T1 and the S1 interface is based on IP over GE, the three modes can obtain the reference clock from the clock synchronized from the Abis or Iub E1/T1.

l

Common Ethernet reference clock from S1 interface When common Ethernet reference clock is used, GSM and UMTS can obtain the reference clock via the BBU backplane from the LTE main control board LMPT/UMPT.

l

Common IP network 1588V2 reference clock from S1 interface When GSM, UMTS and LTE BTS support 1588V2 reference clock, only one 1588V2 clock server and client are required. GSM and UMTS can obtain the clock via the BBU backplane from the LTE main control board LMPT/UMPT.

Enhancement l

SRAN10.0: Common IP network 1588V2 reference clock for time synchronization from S1 interface When GSM, UMTS, and LTE support the 1588V2 reference clock for time synchronization, only one 1588V2 clock server and one 1588V2 clock client are required. GSM and UMTS can obtain the reference clock for time synchronization via the BBU backplane from the LTE main control board LMPT/UMPT.



17



3.3.2 System Capacity and Network Performance System Capacity The change in this feature has no impact.

Network Performance The change in this feature has no impact.

3.3.3 NEs The change in this feature is implemented on the GBTS or eGBTS.

3.3.4 Hardware The WMPT, UTRP2, and UTRP9 do not support IEEE1588 V2 clock synchronization.

3.3.5 Inter-NE Interfaces The change in this feature has no impact.

3.3.6 Operation and Maintenance License The change in this feature has no impact.

Configuration Management The change in this feature has no impact.

Performance Management The change in this feature has no impact.

Fault Management The change in this feature has no impact.

3.3.7 Related Features Prerequisite Features This feature is dependent on the GBFD-118620 Clock over IP Support 1588V2 feature.

Mutually Exclusive Features The change in this feature has no impact. Issue Draft A (2014-07-30)


18



Impacted Features The change in this feature has no impact.



19


4 Glossary

4

Glossary

For the acronyms, abbreviations, terms, and definitions, see Glossary.



20


5 Reference Documents

5

Reference Documents

1.


2.


3.

iManager U2000 V200R015 Network Impact Report

4.

GBSS17.0 Feature List

5.

GBSS17.0 Feature Description

6.

SRAN10.0&GBSS17.0&RAN17.0 BSC6900 Product Description

7.

SRAN10.0&GBSS17.0&RAN17.0 BSC6910 Product Description

8.

3900 Series GSM Base Station Product Description

9.

BSC6900 GSM V900R017C00 Release Notes (for a specific patch)

10. BSC6910 GSM V100R017C00 Release Notes (for a specific patch) 11. BTS3900 V100R010C00 (GBTS) Release Notes (for a specific patch) 12. V900R017C00 BSC6900 GSM Product Documentation 13. V100R017C00 BSC6910 GSM Product Documentation 14. V100R010C00 3900 Series Base Station Product Documentation 15. V200R015 U2000 Product Documentation 16. GBSS17.0 Feature Documentation



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Network Impact Report(GBSS17.0_Draft a)

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