BTS3900 Product Description

Product Description

HUAWEI BTS3900 GSM V300R008

Issue

01

Date

2008-05-15

HUAWEI TECHNOLOGIES CO., LTD.

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HUAWEI BTS3900 GSM V300R008 Product Description

Huawei Technologies Co., Ltd. provides customers with comprehensive technical support and service. Please feel free to contact our local office or company headquarters.

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]

Copyright © Huawei Technologies Co., Ltd. 2008. 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 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.

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About This Document Author Prepared by

Li Haixia

Date

2008-05-12

Reviewed by

Peng Jianhua, Feng Baoshun, Chen Ping, Xu Kai, Liu Jianyun, Jin Yan, He Jia, Xia Jun, and Zhao Ming

Date

2008-05-14

Approved by

Feng Baoshun

Date

2008-05-15

Organization This document describes the BTS3900 in terms of features, system architecture, functions, OM, reliability, and technical specifications. The following table describes the organization of this document. Chapter

Content

1 Introduction to BTS3900

This chapter provides a general description of the BTS3900.

2 System Architecture

This chapter describes the structure, components, and recommended configuration of the BTS3900.

3 Ports

This chapter describes the physical ports of the BTS3900.

4 Product Features

This chapter describes the features of the BTS3900.

5 OM System

This chapter describes the components and functions of the OM system.

6 Reliability

This chapter introduces the measures taken in reliability design of the BTS3900 in terms of system, hardware, and software.

7 Technical Specifications

This chapter lists the main performance and engineering specifications of the BTS3900.

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Chapter

Content

A Technical Standards

The appendix lists the technical standards complied by the BTS3900.

B Glossary

The appendix lists the glossary.

C Acronyms and Abbreviations

The appendix lists the acronyms and abbreviations.

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Change History Issue

Description

Date

Author

Approved by

01

Initial commercial release

2008-05-15

Li Haixia

Feng Baoshun

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Contents 1 Introduction to BTS3900................................................................................................ 9 1.1 Overview ..................................................................................................................................... 9 1.2 Appearance of the BTS3900 ...................................................................................................... 10 1.3 Benefits of the BTS3900.............................................................................................................11 1.3.1 Efficient Site Usage and Fast Networking ...........................................................................11 1.3.2 Cost-Effective Solutions for Capacity and Coverage ...........................................................11 1.3.3 Green Communication Design............................................................................................11 1.3.4 Reliable OM with Minimized OPEX.....................................................................................11 1.3.5 Smooth Evolution to Future-Oriented Network................................................................... 12

2 System Architecture .................................................................................................... 13 2.1 BTS3900 Cabinet ...................................................................................................................... 13 2.1.1 Structure of the BTS3900 Cabinet (–48 V DC)................................................................... 13 2.1.2 Structure of the BTS3900 Cabinet (+24 V DC)................................................................... 14 2.1.3 Structure of the BTS3900 Cabinet (220 V AC) ................................................................... 15 2.2 BTS3900 Modules ..................................................................................................................... 16 2.2.1 BBU3900 .......................................................................................................................... 16 2.2.2 DRFU ............................................................................................................................... 19 2.2.3 GRFU ............................................................................................................................... 21 2.2.4 GATM ............................................................................................................................... 23 2.2.5 DCDU-01 .......................................................................................................................... 23 2.2.6 Power Subrack (DC/DC) ................................................................................................... 24 2.2.7 Power Subrack (AC/DC) ................................................................................................... 25 2.2.8 FAN Unit ........................................................................................................................... 26 2.3 Configuration of the BTS3900.................................................................................................... 26 2.3.1 DRFU Configured ............................................................................................................. 26 2.3.2 GRFU Configured ............................................................................................................. 27

3 Ports .............................................................................................................................. 28 3.1 Power Ports............................................................................................................................... 28 3.2 Transmission Ports .................................................................................................................... 28 3.3 Alarm Ports................................................................................................................................ 29 3.4 Other Ports................................................................................................................................ 29

4 Product Features.......................................................................................................... 31 4.1 High Capacity............................................................................................................................ 31 4.2 Wide Coverage ......................................................................................................................... 31

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HUAWEI BTS3900 GSM V300R008 Product Description 4.3 Multiple Frequency Bands ......................................................................................................... 31 4.4 Easy Installation ........................................................................................................................ 32 4.5 Flexible Networking ................................................................................................................... 32 4.6 Convenient OM ......................................................................................................................... 32 4.7 Various Transmission Modes ..................................................................................................... 32 4.8 Enhanced Antenna System........................................................................................................ 33 4.9 Good Environment Adaptability.................................................................................................. 33 4.10 Smooth Capacity Expansion and Evolution .............................................................................. 34 4.11 Flexible Clock Synchronization Modes ..................................................................................... 34 4.12 Support for Group Calling and Group Broadcasting.................................................................. 34 4.13 High Network Reliability........................................................................................................... 35 4.14 Power Saving .......................................................................................................................... 35 4.15 Improved Traffic Capacity ........................................................................................................ 35

5 OM System.................................................................................................................... 37 5.1 OM System ............................................................................................................................... 37 5.2 OM Functions............................................................................................................................ 38 5.2.1 Equipment Management ................................................................................................... 38 5.2.2 Software Management ...................................................................................................... 38 5.2.3 Configuration Management ............................................................................................... 38 5.2.4 Service Management ........................................................................................................ 39 5.2.5 Performance Management ................................................................................................ 39 5.2.6 Security Management ....................................................................................................... 39 5.2.7 Alarm Management ........................................................................................................... 39 5.2.8 Environment Monitoring .................................................................................................... 39

6 Reliability ...................................................................................................................... 40 6.1 System Reliability ...................................................................................................................... 40 6.2 Hardware Reliability................................................................................................................... 40 6.3 Software Reliability .................................................................................................................... 41 6.3.1 Data Redundancy ............................................................................................................. 41 6.3.2 Error Tolerance ................................................................................................................. 41

7 Technical Specifications.............................................................................................. 43 7.1 RF Specifications....................................................................................................................... 43 7.2 Mechanical Specifications.......................................................................................................... 45 7.3 Power Specifications ................................................................................................................. 45 7.4 Surge Protection Specifications ................................................................................................. 46 7.5 Environment Specifications........................................................................................................ 47

A Technical Standards .................................................................................................... 49 A.1 EMC Standards......................................................................................................................... 49 A.2 Surge Protection Standards....................................................................................................... 50 A.3 Safety Standards....................................................................................................................... 50

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HUAWEI BTS3900 GSM V300R008 Product Description A.4 Environment Standards ............................................................................................................. 50 A.4.1 Operating Environment Standards .................................................................................... 50 A.4.2 Transportation Standards .................................................................................................. 50 A.4.3 Storage Standard.............................................................................................................. 50 A.5 Physical Protection Standard..................................................................................................... 50

B Glossary ....................................................................................................................... 51 C Acronyms and Abbreviations ..................................................................................... 55

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1

Introduction to BTS3900

1.1 Overview The BTS3900 is an indoor macro base station, which is a member of the 3900 GSM BTS family. The 3900 GSM BTS family is the fourth generation BTSs developed by Huawei. The family products are classified into indoor macro BTSs, outdoor separated macro BTSs, and DBSs. Through combination of associated BTS types, the 3900 GSM BTS family enables fast networking with low cost in various scenarios. Table 1-1 lists the products in the 3900 GSM BTS family. Table 1-1 Products in the 3900 GSM BTS family BTS Type

Model

Max. Number of TRXs per Cabinet

Application Scenario

Indoor macro BTS

BTS3900

DRFU configured：12

l

Densely populated areas with high traffic volume

GRFU configured：36

l

Areas that require wide coverage

l

Areas where the construction cost of equipment room is high or the space resource is limited

DRFU configured：12

l

Urban/suburban/rural areas with high traffic volume

GRFU configured：36

l

Areas where site acquisition is difficult or the construction cost of equipment room is high

Outdoor separated macro BTS

BTS3900A

Distributed base station

DBS3900

l

BBU: 72

l

l

RRU3004 configured: 4

Urban/suburban/rural areas with high traffic volume

l

RRU3008 configured: 8

Areas where site acquisition is difficult

l

Areas where the construction cost of equipment room is high or the space resource is limited

l

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1.2 Appearance of the BTS3900 The BTS3900 houses the baseband unit (BBU3900) and the radio filter unit (RFU). The radio filter unit is of two types, the double radio filter unit (DRFU) and the GSM radio filter unit (GRFU), of which the DRFU supports two transceivers and the GRFU supports six transceivers. . The BTS3900 cabinet is classified into the BTS3900 cabinet (–48 V DC), BTS3900 cabinet (+24 V DC), and the BTS3900 cabinet (220 V AC) with the power input. The three types of BTS3900 cabinets support stack installation. Figure 1-1 shows a single BTS3900 cabinet (–48 V DC) and two BTS3900 cabinets (–48 V DC) in stack mode. Figure 1-1 Appearance of the BTS3900 cabinet

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1.3 Benefits of the BTS3900 The indoor macro BTS3900 adopts the unified module design, and thus allows multiple radio access technologies (RATs) in one cabinet. It is small in size and light in weight, and supports smooth evolution to the Long Term Evolution (LTE).

1.3.1 Efficient Site Usage and Fast Networking l

The BTS3900 is one of the most compact macro base stations in the industry with the footprint of only 600 mm x 450 mm; thus meeting the space requirements of the operator for site acquisition and equipment room construction.

l

The BTS3900 has a streamlined modular structure. The part assembly and disassembly are easy and fast.

1.3.2 Cost-Effective Solutions for Capacity and Coverage l

A DRFU provides two TRXs. The transmit power on top of the cabinet per TRX is up to 45 W for GSM900 or 71 W for GSM900 in Power Boost Technology (PBT) mode.

l

A GRFU provides up to six TRXs. The transmit power on top of the cabinet per TRX is up to 60 W for GSM900. With excellent performance, the BTS3900 guarantees wide coverage and high throughput, and helps minimize the number of sites.

l

The BTS3900 supports two-way receive diversity, four-way receive diversity (DRFU), transmit diversity(DRFU), and PBT(DRFU). Therefore, the uplink coverage and downlink coverage are enhanced.

l

The TMA can be configured for the BTS3900 to improve the receive sensitivity.

1.3.3 Green Communication Design l

The BTS3900 adopts the innovative technology in management on power amplification and power consumption. The occupation on resources, such as the equipment room and energy resources, is minimized.

l

Compared with traditional macro BTSs, the integrated BTS3900 cabinet has the power consumption reduced by 8%. Therefore, the power rate and the cost on related devices, such as power equipment, batteries, air conditioner, and heat exchanger, are reduced accordingly.

1.3.4 Reliable OM with Minimized OPEX l

The BTS3900 can share the BBU, RFU, and power system with other products of the same BTS family. Thus, the cost in production, transportation, and OM is reduced.

l

The BTS3900 features the streamlined structure design, separated installation of the BBU and DRFU/GRFU, and assembled modules. The transportation, configuration, and installation become easy. As a result, the difficulty and cost in network construction for the telecom operator are minimized.

l

No crane is needed because the BTS3900 cabinet weights only 57 kg.

l

All the modules in the BTS3900 are easily accessible from the front of the cabinet, which reduces the maintenance expense.

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1.3.5 Smooth Evolution to Future-Oriented Network l

The BTS3900 is designed on the basis of the unified platform for the Huawei wireless products. BTSs for different networks such as GSM, WCDMA, CDMA, and WiMAX can share the same cabinet and BBU. The BTS3900 enables the service upgrade and network evolution for the telecom operators around the globe.

l

The BTS3900 supports the Abis IP/FE interface in hardware and can support Abis over IP through software upgrade if required.

l

The BTS3900 supports the smooth evolution to the LTE.

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2

System Architecture

2.1 BTS3900 Cabinet The BTS3900 cabinet is classified into the BTS3900 cabinet (–48 V DC), BTS3900 cabinet (+24 V DC), and the BTS3900 cabinet (220 V AC) with the power input.

2.1.1 Structure of the BTS3900 Cabinet (–48 V DC) The BTS3900 cabinet (–48 V DC) consists of the DRFU/GRFU, FAN unit, GATM, BBU, and DCDU-01. The BTS3900 cabinet (–48 V DC) can be installed in stack mode. Figure 2-1 shows a fully configured cabinet in S12/12/12 configuration.

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Figure 2-1 BTS3900 cabinet (–48 V DC) in full configuration

(1) Radio filter unit (4) Baseband unit

(2) FAN unit (5) Direct unit-01

(3) GSM antenna and TMA control module current

distribution

2.1.2 Structure of the BTS3900 Cabinet (+24 V DC) The BTS3900 cabinet (+24 V DC) consists of the DRFU or GRFU, FAN unit, BBU, DCDU-01, PSU (DC/DC), and wiring unit (+24 V) of the power subrack. The BTS3900 cabinet (–48 V DC) can be stacked on a BTS3900 cabinet (–48 V DC). Figure 2-2 shows a fully configured cabinet in S12/12/12 configuration.

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Figure 2-2 BTS3900 cabinet (+24 V DC) in full configuration

(1) Radio filter unit (3) Baseband unit (5) Wiring unit of the power subrack (+24 V)

(2) FAN unit (4) Direct current distribution unit-01 (6) Power supply unit (DC/DC)

2.1.3 Structure of the BTS3900 Cabinet (220 V AC) The BTS3900 cabinet (220 V AC) consists of the DRFU or GRFU, FAN unit, BBU, DCDU-01, PMU, PSU (AC/DC), and wiring unit of the power subrack (220 V). The BTS3900 cabinet (220 V AC) can be stacked on a BTS3900 cabinet (–48 V DC). Figure 2-3 shows a fully configured cabinet in S12/12/12 configuration.

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Figure 2-3 BTS3900 cabinet (220 V AC) in full configuration

(1) Radio filter unit (2) FAN unit (4) Direct current distribution (5) Power supply unit unit-01 (AC/DC) (7) Power and environment monitoring unit

(3) Baseband unit (6) Wiring unit of the power subrack (220 V)

2.2 BTS3900 Modules 2.2.1 BBU3900 Figure 2-4 shows the BBU panel.

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Figure 2-4 BBU panel

The BBU mainly consists of the following components: l

BTS Interface Unit

l

Central Processing Unit

l

High-Speed Interface Unit

l

Clock Unit

l

Monitoring Unit

In addition, the BBU is installed with the FAN and power supply units. Figure 2-5 shows the interaction between the components of the BBU.

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Figure 2-5 Components of the BBU

The functions of these components are as follows:

BTS Interface Unit The BTS interface unit performs the following functions: l

Connects the BTS to the BSC

l

Exchanges data between the E1 link and the DBUS

l

Synchronizes the current-level clock with the upper-level clock

Central Processing Unit The central processing unit performs centralized management (OM and signaling processing) of the entire separated base station system. It also provides the reference clock for the system. The central processing unit performs the following functions: l

Supports the UART communications protocol

l

Controls the BTS interface unit and the communication between the BSC and the BTS

l

Controls the RF interface unit and communicates with the DRFU/GRFU

l

Provides and manages BTS clock signals, and supports external synchronization clock input

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High-Speed Interface Unit Each BBU3900 provides six CPRI ports. The high-speed interface unit performs the following functions: l

Receives the uplink baseband data from the DRFU/GRFU

l

Transmits the downlink baseband data to the DRFU/GRFU

Clock Unit The clock unit performs the following functions: l

Provides a high precision clock source for the BTS and provides the system clock based on this clock source

l

Checks the phase-locked status, provides phase lock for the software, adjusts DA, and generates frame numbers

Monitoring Unit The monitoring unit collects various types of Boolean alarm information, and reports the alarm information to the central processing unit.

2.2.2 DRFU The DRFU performs modulation and demodulation between baseband signals and RF signals, processes data, and combines and divides signals. Figure 2-6 shows the DRFU panel. Figure 2-6 DRFU panel

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The DRFU consists of the following components: l

High-Speed Interface Unit

l

Signal Processing Unit

l

Power Amplifier

l

Dual-Duplexer

Figure 2-8 shows the components of the DRFU. Figure 2-7 Components of the DRFU

The functions of each component are as follows.

High-Speed Interface Unit The high-speed interface unit performs the following functions: l

Transmits the signals received from the BBU to the signal processing unit

l

Transmits the signals received from the signal processing unit to the BBU

Signal Processing Unit The signal processing unit consists of two uplink RX channels and two downlink TX channels. Each channel supports two carriers. The functions of the uplink RX channels are as follows: l

Down-converting the RF signals to IF signals

l

Amplifying the IF signals and performs IQ demodulation

l

Performing analog-to-digital conversion

l

Sampling digital signals

l

Performing matched filtering

l

Supporting the digital automatic gain control (DAGC)

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HUAWEI BTS3900 GSM V300R008 Product Description l

Encapsulating data

The functions of the downlink TX channels are as follows: l

Decapsulating the clock signals, control signals, and data signals from the BBU and sending them to associated units

l

Shaping and filtering downlink signals

l

Performing digital-to-analog conversion through the DAC and performing IQ modulation

l

Up-converting the IF signals to the transmit band

Power Amplifier The power amplifier amplifies the low-power RF signals from the signal processing unit.

Dual-Duplexer The dual-duplexer performs the following functions: l

RX signals and TX signals can share the same antenna channel

l

Filters RX signals and TX signals

2.2.3 GRFU The GRFU performs modulation and demodulation between baseband signals and RF signals, processes data, and combines and divides signals. The GRFU consists of the following components: l

Interface module

l

TRX

l

Power Amplifier

l

Duplexer

l

LNA

Figure 2-8 shows the components of the GRFU.

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Figure 2-8 Components of the GRFU

GRFU

The functions of each component are as follows.

Interface module The interface module receives downlink baseband data from the BBU, transmits uplink baseband data to the BBU, and forwards data from the cascaded RRUs.

TRX The TRX has two RX channels and one TX channel for RF signals. l

The RX channel down-converts the received signals into Intermediate Frequency (IF) signals and performs amplification, analog-to-digital (A/D) conversion, digital down-conversion, matched filtering, and Digital Automatic Gain Control (DAGC).

l

The TX channel performs shape filtering of downlink spreading signals, digital-to-analog (D/A) conversion, and up-conversion of RF signals into transmit band.

Power Amplifier The PA implements the DPD technologies to amplify low-power RF signals from the TRX.

Duplexer The duplexer multiplexes receive signals and transmit signals, which enables the receive signals and transmit signals to share the same antenna path. The duplexer also filters receive signals and transmit signals.

LNA The LNA amplifies the signals received from antennas.

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2.2.4 GATM The GSM antenna and TMA control module (GATM) is optional. Figure 2-9 shows the GATM panel. Figure 2-9 GATM panel

The GATM performs the following functions: l

Controls the RET antenna

l

Feeds power to the TMA

l

Reports the RET control alarm signals

l

Monitors the current from the feeder

2.2.5 DCDU-01 The direct current distribution unit (DCDU-01) provides 10 –48 V DC outputs. Figure 2-10 shows the DCDU-01 panel.

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Figure 2-10 DCDU-01 panel

The DCDU-01 performs the following functions: l

Leads the -48 V DC into the cabinet

l

Distributes the 10 –48 V DC outputs to boards and modules in the cabinet

l

Provides surge protection of 10 kA in differential mode and 15 kA in common mode and provides dry contact alarms related to surge protection failures

2.2.6 Power Subrack (DC/DC) The power subrack (DC/DC) consists of the wiring unit (+24 V) and the PSU (DC/DC). Figure 2-11 shows the panel of the power subrack (DC/DC).

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Figure 2-11 Panel of the power subrack (DC/DC)

The power subrack (DC/DC) performs the following functions: l

Leads the +24 V DC to the cabinet

l

Converts the +24 V DC into the -48 V DC

l

Supplies the –48 V DC to the DCDU-01 through the LOAD and RTN ports

2.2.7 Power Subrack (AC/DC) The power subrack (AC/DC) is configured in only the BTS3900 cabinet (220 V AC). It consists of the wiring unit (220 V), PSU (AC/DC), and PMU. Figure 2-12 shows the panel of the power subrack (AC/DC).

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Figure 2-12 Panel of the power subrack (AC/DC)

The power subrack (AC/DC) performs the following functions: l

Leads the 220 V AC into the cabinet

l

Converts the 220 V AC into the –48 V DC

l

Supplies the –48 V DC to the DCDU-01

l

Monitors the environment, detects module faults, and reports alarms

l

Communicates with the central processing unit through the RS232/RS422 serial port

l

Manages the power system and the battery charging and discharging

2.2.8 FAN Unit The FAN unit regulates the temperature at the air inlet of the cabinet and in the fans. It can adjust the rotation speed of the fans to implement ventilation and dissipation for the cabinet.

2.3 Configuration of the BTS3900 2.3.1 DRFU Configured The BTS3900 cabinet in full configuration provides 12 TRXs. A single cabinet supports the S4/4/4 and S2/2/2 configurations. Through stack installation, the BTS3900 cabinet can support the S1/1/1+S3/3/3 or S4/4/4+S4/4/4 configuration, and support the application in dual-band network.

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2.3.2 GRFU Configured The BTS3900 cabinet in full configuration provides 36 TRXs. A single cabinet supports the S4/4/4 and S12/12/12 configurations. Through stack installation, the BTS3900 cabinet can support the S1/1/1+S3/3/3 or S4/4/4+S4/4/4 configuration, and support the application in dual-band network.

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3

Ports

3.1 Power Ports Table 3-1 lists the power ports on the BTS3900. Table 3-1 Power ports of the BTS3900 Port

Cabinet Type

Description

Wiring terminals

BTS3900 cabinet (–48V DC)

–48V DC input

Wiring terminals

BTS3900 cabinet (+24V DC)

+24V DC input

L and N terminals

BTS3900 cabinet (110V AC /220V AC)

110V AC /220V AC input

3.2 Transmission Ports Table 3-2 lists the transmission ports of the BTS3900. Table 3-2 Transmission ports of the BTS3900 Port

Connector

Description

INSIDE

DB25 male

Transfers the four E1s/T1s between the UELP and the GTMU

OUTSIDE

DB26 male

Provides the input and output of the four E1s/T1s between the BBU and the BSC

CPRI

SFP

Provides the input and output of the CPRI signals between the BBU and the GRFU

E1/T1

DB26 male

Provides the input and output of the four E1s/T1s between the GTMU and the UELP or between the GTMU and the BSC

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Port

Connector

Description

FE0

RJ45

Reserved Connects the BBU to a routing device in the equipment room through the Ethernet cable to transmit network information.

FE1

DLC

Reserved Connects the BBU to a routing device in the equipment room through the optical cable to transmit network information.

3.3 Alarm Ports In the BTS3900 system, the alarms ports vary with the optional modules configured in the BBU3900. l

When the BBU3900 is configured with one UPEU, two RS485 buses and eight dry contact signals are provided.

l

When the BBU3900 is configured with two UPEUs or one UPEU plus one UEIU, 4 RS485 buses and 16 dry contact signals are provided.

Table 3-3 describes the alarm ports of the BTS3900. Table 3-3 Alarm ports of the BTS3900 Port

Connector

Description

MON0

RJ45

Provides the input and output of the externally collected environment monitoring signals in the format of the RS485 frame to the GTMU

MON1

RJ45

Provides the input and output of the externally collected environment monitoring signals in the format of the RS485 frame to the GTMU

EXT-ALM0

RJ45

Transmits the externally collected environment monitoring signals in the format of the dry contact signals to the GTMU

EXT-ALM1

RJ45

Transmits the externally collected environment monitoring signals in the format of the dry contact signals to the GTMU

3.4 Other Ports Table 3-4 describes other external ports of the BTS3900.

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Table 3-4 Other external ports of the BTS3900 Port

Connector

Description

ETH

RJ45

For local maintenance and commissioning

USB

USB

A reserved port used in software upgrade from a USB disk

TST

USB

Connected to a tester for testing the output clock signals

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4

Product Features

4.1 High Capacity l

The BTS3900 cabinet in full configuration houses six DRFUs and provides up to 12 TRXs in the maximum configuration of S4/4/4.

l

The BTS3900 cabinet in full configuration houses six GRFUs and provides up to 36 TRXs in the maximum configuration of S12/12/12.

l

The BTS3900 cabinet supports up to six sectors.

l

A single BTS3900 supports up to 72 GSM TRXs in the maximum configuration of S24/24/24.

4.2 Wide Coverage l

The static sensitivity of the TCH/FS is –113 dBm (900M, typical value at normal temperature).

l

The BTS3900 supports two-way receive diversity and four-antenna receive diversity (DRFU) to improve the uplink coverage.

l

It supports transmit diversity and PBT (DRFU) to improve the downlink coverage.

l

It supports omni-directional and directional coverage modes.

l

The TMA can be configured on the BTS3900 to improve the receiver sensitivity.

l

It supports baseband FH, RF FH, antenna hopping, and dynamic MAIO to suppress the network interference and thus to expand the network capacity.

4.3 Multiple Frequency Bands l

DRFU configured: The BTS3900 supports GSM900 and DCS1800 catering to requirements of the telecom operators in different regions.

l

GRFU configured: The BTS3900 supports GSM1900, DCS1800, GSM850, PGSM 900 and EGSM 900 catering to requirements of the telecom operators in different regions.

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4.4 Easy Installation l

The BTS3900 cabinet can be installed on the ESD floor, on the concrete floor, against the wall, or in stack mode.

l

Two cabinets can be installed in stack mode with the footprint of only 600 mm x 450 mm. The battery cabinets can also be stacked to reduce the area of the equipment room.

l

The cables connected to all the ports on the modules and boards can be routed from the front panel and maintenance can be performed in front of the cabinet.

l

The subracks, modules, and boards are the same in depth and height.

l

The power distribution components (with surge protection and filtering) have a modular structure and can be used in different cabinets. The modular design facilitates future capacity expansion and replacement.

4.5 Flexible Networking l

Supports coexistence with the BTS3X, BTS3012, and DBS3900.

l

Supports various network topologies such as star, chain, tree, ring, and hybrid topologies.

4.6 Convenient OM l

It supports three OM modes: Site Maintenance Terminal mode, LMT mode, and centralized network management mode.

l

It supports multiple maintenance interfaces such as MMI, BIN, Web UI, SNMP, and CLI.

l

It supports Intranet maintenance. Once granted the authority, the user can maintain any BTS within the system through a network element.

l

The Site Maintenance Terminal can be used to maintain the BTS through the Ethernet port.

l

Once granted the authority, the user can install the client software to maintain the network elements within the entire network in a remote and centralized way.

l

After the equipment is installed, the BTS3900 can establish a default OM path with the upper-level equipment if the data is not configured. Thus, the user can remotely load programs and data to the BTS.

l

The boards and modules support the plug-and-play function.

4.7 Various Transmission Modes l

Supports the E1/T1 transmission and reserves the FE port

l

Supports microwave, satellite, and optical transmission

l

Allows 2 U (-48V cabinet with DRFU) and 5 U (-48V cabinet with GRFU) space for the built-in transmission equipment

l

Supports the IP transmission in hardware and TDM transmission

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4.8 Enhanced Antenna System l

Supports the RET antenna to optimize the performance of network coverage, to suppress network interference, and to expand network capacity

l

Supports remote batch operations, batch software upgrades, and batch adjustment on the tilt of the RET antenna

l

Supports the automatic scanning of the RET antenna

l

Supports the Antenna Interface Standard Group 2.0 (AISG2.0) and AISG1.1

l

Supports the cascaded RET antennas

4.9 Good Environment Adaptability Table 4-1 Environment adaptability of the BTS3900 Environment Adaptability

Description

Waterproofing and dustproofing

l

The GRFU/DRFU meets the IP54 standard.

l

The PCB meets the IP20 standard.

l

3/4C2 for the areas with general pollution, and where the industrial active substances are distributed over the entire area or the cities/suburbs with busy traffic

l

3/4C3 for the areas near the places of industrial production with chemical pollution.

l

For details, refer to the IEC 721-3-3 (class 3K8H).

Chemical environment adaptability

Biological environment adaptability

4B2 for the areas that are conducive to the growth of mildew and where rodents such as rats can enter

Anti-seismic

l

ETS 300 019-1-3

l

Special mechanical parts can be added in the standard cabinet to meet the requirements in the GR-63-CORE Zone 4.

Working temperature

-20℃ to +50℃(in long-term operating environment) +50℃ to +55℃(in short-term operating environment)

Power supply

–48 V DC, +24 V DC, and 110V AC /220 V AC inputs

Noise

ETS 300 753 4.1E rural level (sound power: 61 dBA/25℃ and 67 dBA/45℃)

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Environment Adaptability

Description

Auxiliary equipment

AFB, APM, SPD40R, and Uninterruptible Power Supply (UPS), which provide comprehensive solutions regarding power distribution, surge protection, transmission cable distribution, transmission equipment installation, and power backup for the BTS3900.

4.10 Smooth Capacity Expansion and Evolution l

Capacity expansion The BTS3900 cabinet in full configuration supports 6 DRFUs and 12 TRXs in the maximum configuration of S4/4/4. The BTS3900 cabinet in full configuration supports 6 GRFUs and 36 TRXs in the maximum configuration of S12/12/12. The BTS3900 cabinet supports the stack installation. A single BTS3900 cabinet supports up to 72 GSM TRXs in the maximum configuration of S24/24/24.

l

Upgrade The BTS3900 supports coexistence with the double-transceiver BTS3012/BTS3012AE and the outdoor mini BTS3006C/3002E. The BTS3900 is developed on the basis of the unified platform for Huawei Wireless products, and supports smooth evolution to the LTE.

4.11 Flexible Clock Synchronization Modes The BBU in the BTS3900 cabinet supports multiple clock synchronization modes to meet the different networking requirements. l

It can extract the 8 kHz clock signals through the Abis interface to provide the reference clock for the system.

l

It can extract clock signals from the Global Positioning System/Global Navigation Satellite System (GPS/GLONASS).

l

It can synchronize with the external clock input, namely, the 2 MHz Building Integrated Timing Supply System (BITS) clock.

l

The BTS3900 can operate for a minimum of 90 days with the internal clock working in free-run mode.

4.12 Support for Group Calling and Group Broadcasting l

Support for the group calling in the public network

l

Support for the group broadcasting in the public network

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4.13 High Network Reliability The support for the anti-interference function of the signaling links over the air interface helps improve the network reliability.

4.14 Power Saving The support for the intelligent bypass function of the combiner helps reduce the power consumption of the transceivers and hence the power consumption of the base station.

4.15 Improved Traffic Capacity l

The support for the Enhanced ICC (EICC) function helps improve the traffic capacity.

l

The support for the multislot level (30-34) of the MS helps increase the transmission bandwidth by 25%, and hence the traffic capacity.

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5

OM System

5.1 OM System The BTS3900 supports the OM system based on the Man Machine Language (MML) and the Graphic User Interface (GUI). The OM system enables a general OM mechanism independent of the hardware to meet customers' requirements in operating and maintaining the equipment, and provides powerful OM functions. Figure 5-1 shows the OM system. Figure 5-1 Topology of the OM system OM system iManager M2000

BTS

Site Maintenance Terminal

VLAN

BSC

Site Maintenance Terminal

BTS

LMT

M2000: centralized network management center

LMT: Local Maintenance Terminal

BTS: GSM base station

BSC: Base Station Controller

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The BTS3900 supports three OM modes: Site Maintenance Terminal mode, Local Maintenance Terminal mode, and centralized network management mode. l

Site Maintenance Terminal mode: The Site Maintenance Terminal is locally connected to the BTS through the Ethernet for maintenance. You can use the Site Maintenance Terminal System to operate and maintain the site, cell, Radio Carrier (RC), Baseband Transceiver (BT), channel, and board. In this mode, only one BTS can be maintained at a time.

l

Local Maintenance Terminal mode: The LMT is used to maintain the BTS through the OMLs on the Abis interface, which is an interface between the BSC and the BTS. The LMT communicates with the BSC through a LAN. You can use the LMT to operate and maintain the site, cell, RC, channel, and board. This mode is used to configure and modify the data of the BSC and BTS.

l

Centralized network management mode: You can use the Huawei iManager M2000 to maintain the BTS through the OM network. The M2000 can operate and maintain the site, cell, channel, and board. In this mode, multiple BTSs can be maintained at a time.

5.2 OM Functions The OM system of the BTS3900 enables a general OM mechanism independent of the hardware, including equipment management, software management, configuration management, service management, performance management, security management, and environment monitoring.

5.2.1 Equipment Management Through the OM system, you can query the status of all the components (boards/modules) and all the external devices (power supply/environment monitoring/RET). You can also perform data configuration and status management for some devices.

5.2.2 Software Management l

Provides various functions, such as downloading and activating the BTS software, upgrading patches, and loading and downloading files. The associated tasks involve consistency check on the software and hardware releases, release management, and software upgrade.

l

Allows upgrade of the BTS software through the USB port on the BBU without a PC.

5.2.3 Configuration Management l

Allows consistency check on the added, deleted, or modified BTS data.

l

Supports dynamic and static data configuration. In dynamic data configuration, the data immediately take effect after modification; in static data configuration, the modified data take effect after the BTS is reset.

l

Supports automatic data backup.

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5.2.4 Service Management l

Supports parameter setting and alarm query for the baseband boards, RET antenna, and environment monitoring device.

l

Supports various OM functions for the RET antenna, such as automatic scanning, data configuration (antenna tilt and TMA gain), status query, and alarm reporting.

l

Supports complete self-test on hardware installation. The BTS software can be upgraded through the USB software package; thus shortening the upgrade period. The data configuration of the BTS can also be remotely modified.

5.2.5 Performance Management l

Monitors the performance of the internal and external telecommunications networks and generates alarms when the performance deteriorates

l

Monitors the operating status of the BTS, such as monitors the traffic volume on the ports and measures the technical data of the BTS

l

Monitors the usage of crucial components, such as the CPU and DSP in the board

5.2.6 Security Management The OM system provides security management functions, such as connection management, user authentication, encryption, and forward resolution of the interface messages between the BTS software and the OMC.

5.2.7 Alarm Management l

Supports query of real-time alarms and history alarms

l

Collects internal and external alarms, such as the environment monitoring device inputs and Boolean inputs

l

Processes alarm correlation to ensure precision and accuracy in locating alarms

l

Provides functions of saving, interpreting, prompting, shielding, filtering, confirming, clearing, post processing, and reporting of alarms

l

Detects and reports alarms, and processes alarm correlation in the system

5.2.8 Environment Monitoring l

BTSs are usually unmanned and dispersedly distributed. The equipment working in the adverse environment may incur fire or flood. To ensure the normal operation of the BTS equipment and to help you handle emergencies, the BTS provides a complete environment monitoring system.

l

The environment monitoring system provides customized solutions regarding door control, infrared, smoke, water damage, humidity, and temperature monitoring.

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6

Reliability

6.1 System Reliability The BTS3900 improves the system reliability by adopting the design of load sharing and redundancy configuration, and optimizing the technique of detecting/isolating the faults on the board and in the system. l

Redundancy configuration The transmission, power supply, and fan units in the system support redundancy configuration, and the BBU supports load sharing. The BBU and DRFUs/GRFUs form a ring. When a DRFU/GRFU in the ring fails, anticlockwise switchover is performed; thus greatly improving the system reliability. Crucial system data such as software releases and data configuration files, is backed up to ensure the normal system operation in case of data corruption.

l

Reliability The BTS3900 system can automatically detect and diagnose the faults in the software and hardware, and reports the fault alarms. In addition, the BTS3900 can monitor the environment and report environment alarms.

6.2 Hardware Reliability l

Overcurrent protection The power system of the BBU and DRFU/GRFU is protected against overcurrent, improper insertion, and inverse insertion.

l

Overtemperature protection The BBU and DRFU/GRFU are protected against high temperature. When the internal temperature is high, the system automatically performs power derating or switches off the power amplifier based on the current temperature. When the temperature reverts to the normal value, the system increases the power level or switches on the power amplifier.

l

Monitoring mechanism The BBU can monitor the environment and report alarms.

l

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Stable power supply



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l

−

Provides a wide range of input voltages and surge protection

−

Protects the programs and data of the system in case of power failure

−

Protects the board against overvoltage, overcurrent, and reverse connection of positive and negative poles

Perfect surge protection A 1 U-high surge protection box is provided for surge protection. Surge protection measures are taken for the AC/DC ports, input/output signal ports of the cabinet (E1 port and Boolean port), antenna port, and GPS port.

6.3 Software Reliability Software reliability is guaranteed through data redundancy and powerful error tolerance.

6.3.1 Data Redundancy Important files, such as software releases and configuration files, and crucial system data are backed up to ensure the normal system operation in case of data corruption. l

Redundancy of software releases The system backs up the software releases, including the BOOTROM, in different partitions. When a software release is faulty, the backup release can be used.

l

Redundancy of data configuration files The system backs up the data configuration files in different partitions. When the running data configuration files are corrupted, the backup data configuration files can be used.

l

Redundancy of the operation logs The system records the user operations in a certain period and backs up the information in the operation logs. When the system incurs an unknown error, the maintenance personnel can locate the problem by tracing back to the normal status, or perform the data restoration.

6.3.2 Error Tolerance The error-tolerance ability prevents the system crash due to the software error. That is, the system has the self-healing ability. The capabilities of the software in error tolerance are as follows: l

Scheduled detection on the crucial resources Usage check is performed on the software in the system to release the suspended software resources, and generate logs and alarms.

l

Task monitoring During the software running, the monitoring process monitors all the tasks. When an error occurs in the software or the hardware is faulty, the monitoring process reports alarms and attempts to restore the normal running of the software.

l

Data check The system checks data consistency on a regular or an event-triggering basis, restores data consistency selectively or preferably, and generates related logs and alarms.

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HUAWEI BTS3900 GSM V300R008 Product Description l

Watchdog When the software is running abnormally, the system detects the error through software watchdog and hardware watchdog, and is automatically reset.

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7

Technical Specifications

7.1 RF Specifications Table 7-1 RF specifications of the BTS3900 (DRFU configured) Item

Specifications

Frequency band

Operating Frequency Band

RX Frequency Band

TX Frequency Band

PGSM 900 MHz

890 MHz to 915 MHz

935 MHz to 960 MHz

EGSM 900 MHz

880 MHz to 915 MHz

925 MHz to 960 MHz

GSM 1800 MHz

1710 MHz to 1785 MHz



Work Mode

Output Power (GMSK/8PSK)

900 MHz

Non-combination

45 W/30 W

Combination

20 W/14 W

PBT

71 W/47 W

Non-combination

40 W/26 W

Combination

18 W/12 W

PBT

63 W/42 W

TX specification

1800 MHz

RX specification

Channel Type

Static Sensitivity

TCH/FS

l

Receive independency:

–113 dBm (900M/1800M) l

Two-way receive diversity

–116 dBm (900M/1800M)

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l

Four-way receive diversity

l

–118.5 dBm (900M/1800M)



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Table 7-2 RF specifications of the BTS3900(GRFU configured) Item

Specification

Frequency band

Operating Band

RX Band

TX Band

GSM 850

824 MHz to 849 MHz

869 MHz to 894 MHz

PGSM 900

890 MHz to 915 MHz

935 MHz to 960 MHz

EGSM 900

880 MHz to 905 MHz

925 MHz to 950 MHz

890 MHz to 915 MHz

935 MHz to 960 MHz






1930 MHz to 1970MHz



DSC1800

GSM 1900

TX specifications

RX specifications


Output Power TRX

TOC(GSMK)

TOC(8PSK)

900 MHz/1800 MHz

1

80W

40W

2

40W

20W

3

25W

16W

4

20W

13W

5

15W

10W

6

13W

9W

Channel Type

Static Sensitivity

TCH/FS

Receive independency: l

–113 dBm (900M)

l

–112.5dBm (1800M)

Two-way receive diversity

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l

–116 dBm(900M)

l

–115.5 dBm(1800M)）



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7.2 Mechanical Specifications Table 7-3 Mechanical specifications of the BTS3900 Item

Specifications

Dimensions (W mm x D mm x H mm)

l

Cabinet: 600 × 450 × 900

l

Base: 600 × 420 × 40

l

Empty cabinet: 57

l

Cabinet in full configuration: 142

Weight (kg)

7.3 Power Specifications Table 7-4 Power specifications of the BTS3900 Item

Specification

Power input

l

–48 V DC (–38.4V DC to –57 V DC)

l

+24 V DC (+19 V DC to +29 V DC)

l

110V AC /220 V AC

l

900 MHz

Power consumption (DRFU)

Typical value: 530 W (TOC=20 W, S2/2/2 combination) Typical value: 1130 W (TOC=20 W, S4/4/4 combination) Typical value: 1130 W (TOC=45 W, S4/4/4 non-combination) Maximum value: 2060 W l

1800 MHz, TOC=18 W, S2/2/2 non-combination

l

1800 MHz, TOC=18 W, S4/4/4 combination

Typical value: 530 W, Maximum value:780 W Typical value: 1130 W, Maximum value:2010 W l

1800 MHz, TOC=40 W, S2/2/2 non-combination Typical value: 740 W, Maximum value:1090 W

l

1800 MHz, TOC=40 W, S4/4/4 non-combination Typical value: 1130 W, Maximum value:2010 W

Power consumption (GRFU)

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Configuration

Typical Consumption

TOC=60W, S1/1/1

l

960W（900 MHz）

l

1040W（900 MHz）

l

970W（1800 MHz）

l

1060W（1800 MHz）

TOC=30W, S2/2/2

l

920W（900 MHz）

l

1250W（900 MHz）

l

940W（1800 MHz）

l

1280W（1800 MHz）



Power

Maximum Consumption

Power

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Battery

TOC=25W, S3/3/3

l

900W（900 MHz）

l

1330W（900 MHz）

l

910W（1800 MHz）

l

1350W（1800 MHz）

TOC=20W, S4/4/4

l

1000W（900 MHz）

l

1520W（900 MHz）

l

1020W（1800 MHz）

l

1550W（1800 MHz）

TOC=15W, S5/5/5

l

1000W（900 MHz）

l

1490W（900 MHz）

l

1020W（1800 MHz）

l

1520W（1800 MHz）

TOC=13W, S6/6/6

l

1020W（900MHz）

l

1510W（900 MHz）

l

1040W（1800 MHz）

l

1540W（1800 MHz）

l

Battery specification: 12 V/50 Ah, 100 Ah, or 200 Ah

l

Maximum duration in S4/4/4 configuration: 6 hours

l

The +24 V DC cabinet and the 220 V AC cabinet are installed with a power conversion unit respectively; therefore, no external power cabinet is needed.

l

The typical power consumption refers to the value measured when the traffic is 30%.

7.4 Surge Protection Specifications Table 7-5 Surge protection specifications of the BTS3900 Port

Surge Protection Mode

Surge Current

DC port

Differential mode

3 kA (8/20 us)

Common mode

5 kA (8/20 us)

Differential mode

3 kA (8/20 us)

Common mode

5 kA(8/20us)

Differential mode

8 kA (8/20 us)

Common mode

40 kA (8/20 us)

Differential mode

250 A (8/20 us)

Common mode

250 A( 8/20 us)

AC port

Antenna port (including the GPS port)

Indoor signal port

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Port

Surge Protection Mode

Surge Current

Indoor dry contact input

Differential mode

250 A (8/20 us)

Common mode

250 A (8/20 us)

Indoor dry contact output

Voltage resistance

1500 V AC

RET antenna

Differential mode

3 kA (8/20 us)

Common mode

5 kA (8/20 us)

Differential mode

3 kA (8/20 us)

Common mode

5 kA (8/20 us)

Outdoor dry contact input

7.5 Environment Specifications Table 7-6 Environment specifications of the BTS3900 Item

Specification

Operating environment

l

Operating temperature:-20℃ to +50℃ (in long-term operating environment) +50℃ to +55℃ (in short-term operating environment)

l

Relative humidity: 5% RH to 95% RH

l

Solar radiation: 700 W/m 2 (at the temperature of 45℃)

l

Altitude: –60 m to 3000 m (The BTS operates normally.)

3000 m to 4000 m (The operating temperature of the BTS drops by 1℃ each time the altitude increases by 200 m.)

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l

Mechanical stress: IEC, ETS, and GR-63

l

Other specifications meet the requirements in ETS 300 019-1-3 Class 3.1.



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Item

Specification

Transportation environment

l

Temperature: –40℃ to +70℃

l

Relative humidity: 10% to 100% (without wind)

l

Climatic condition:2K4, including 2K3 and package transportation on 3rd-level roads in high altitude areas without environment protection

l

Mechanical stress

Storage environment

Noise

Ÿ

Meeting the requirements in the ISTA and QDKBA1109-2005

Ÿ

Meeting the falling requirements in GR-63

Ÿ

Meeting the vibration requirements in GR-63

l

Other specifications meet the requirements in the ETS 300 019-1-2 Class 2.3.

l

Temperature: –40℃ to +70℃

l

Relative humidity: 10% to 100% (without wind)

l

Other specifications meet the requirements in the ETS 300 019-1-1 Class 1.2.

l

The cabinet is installed with built-in fans.

l

The noise of a single cabinet is smaller than 6.9 bels.

l

ETS 300 753 4.1E rural level (sound power: 61 dBA/25℃ and 67 dBA/45℃)

Short-term operation refers to the continuous operations within 96 hours and accumulated operations of not more than 15 days a year.

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A

Technical Standards

A.1 EMC Standards The BTS complies with the following EMC standards: l

CISPR 22(2003): limits and methods of measurement of radio disturbance characteristics of information"

l

EN55022(2006): limits and methods of measurement of radio disturbance characteristics of information

l

CISPR 24 (1998-09+ A1:2001 A2:2003): Information Technology Equipment --Immunity characteristics --Limits and methods measurement

l

IEC61000-4-2: Electromagnetic compatibility(EMC) Part 2:Testing and measurement techniques Section 2:Electrostatic discharge immunity test Basic EMC Publication

l

IEC61000-4-3: Electromagnetic compatibility; Part 3: Testing and measurement techniques Section 3 radio frequency electromagnetic fields; immunity test.

l

IEC61000-4-4: Electromagnetic compatibility(EMC) Part 4:Testing and measurement techniques Section 4:Electrical fast transient/burst immunity test Basic EMC publication

l

IEC61000-4-5: Electromagnetic compatibility(EMC) Part 5:Testing and measurement techniques Section 5:Sruge immunity test

l

IEC61000-4-6: Electromagnetic compatibility: Part 6:Testing and measurement techniques: Section 6 conducted disturbances induced by radio-frequency fields; immunity test

l

IEC61000-4-29 : Electromagnetic compatibility: Part 29: Testing and measurement techniques and voltage variations on d.c. Input power port immunity test

l

ETSI 301 489-1 V1.5.1 (2004): Electromagnetic compatibility and Radio spectrum Matters (ERM);ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 1: Common technical requirements

l

ETSI 301 489-8 V1.2.1 (2002) Electromagnetic compatibility and Radio spectrum Matters(ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part8:Specific conditions for GSM base stations

l

FCC 47CFR Part15 (2006): Federal Communication Committee - part 15 - radio frequency device

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A.2 Surge Protection Standards The BTS complies with the following surge protection standards: Protection against lightning –Part 1:General principles

l

IEC 62305-1(2006)

l

IEC 61643-1(2002) Surge Protective devices connected to low-voltage power distribution systems

l

ITU-T K.11(1993) Principles of Protection Against Overvoltage and Overcurrents

l

ITU-T K.27(1996) Bonding Configurations and Earthing Inside a Telecommunication Building

l

ITU-T Recommendation K.56 (2003) Protection of radio base stations against lightning discharges

l

ETS 300 253 (1995) Equipment Engineering; Earthing and bonding of telecommunication equipment in telecommunication centres

A.3 Safety Standards The BTS complies with the following safety standards: l

3G TR34.907 V3.0.0

l

IEC 60950-1

Safety of information technology equipment

l

EN 60950-1

Safety of information technology equipment

l

IEC60215

Safety requirement for radio transmitting equipment

Report on electrical safety requirements and regulations

A.4 Environment Standards A.4.1 Operating Environment Standards The BTS complies with the following standards related to the operating environment: l

EUROPEAN ETS 300 019-1-3 Class 3.1 “Stationary use at weatherprotected locations”.

l

EUROPEAN ETS 300 753: Equipment Engineering(EE) Acoustic noise emitted by telecommunications equipment 1997

l

EUROPEAN ETS 300 019-1-3-Amd

A.4.2 Transportation Standards The BTS complies with the EUROPEAN ETS 300 019-1-2 transportation".

Class 2.3 "PUBLIC

A.4.3 Storage Standard The BTS complies with the EUROPEAN ETS 300 019-1-1 temperature-controlled storage".

Class 1.2 "not

A.5 Physical Protection Standard The BTS complies with K.11 and K.20 recommended by the ITU-T.

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B

Glossary

A Abis interface

An interface between the BSC and the BTS.

Antenna

A device that performs conversion between the electricity energy and the magnetic energy. It is used to radiate and collect radio waves. In transmission, it converts the high-frequency current to the electromagnetic wave; in reception, it converts the electromagnetic wave to the high-frequency current.

B Baseband

A form of modulation in which the information is applied directly onto the physical transmission medium.

BSS

Base station system. A system comprises BSCs and the BTSs under the BSCs. The BSS is controlled by the Mobile Switching Center (MSC) and communicates with the MS in the radio coverage area.

BTS

Base transceiver station. The mobile communications system consists of the MS, BSS, and the NSS. The BSS consists of the BTS and the base station controller (BSC).

C Carrier

A sine wave, whose bandwidth is much higher than the bandwidth of a signal and, which can be identified by amplitude, frequency, and phase.

D Double-transceiver

A mode in which a board provides two TRXs.

E

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EDGE

Enhanced Data rates for GSM Evolution. A mobile telephony technology for enhanced data based on the GSM/GPRS network. It is also called the 2.75 generation technology. As a high-speed mobile data standard that remarkably improves the efficiency of the GPRS channel encoding, EDGE allows the data rate up to 384 kbit/s; thus fully meeting the broadband requirements of radio multi-media applications in the future.

F Transmit diversity

A method to realize the man-made multi-path which optimizes the downlink signals.

G GPRS

General Packet Radio Service. A new mobile data service available to almost every GSM system. It is a connectivity solution based on Internet Protocols that supports a wide range of end-to-end and WAN applications. GPRS is a technology between the second (2G) and third (3G) generations of mobile telephony, which combines the mobile communication and the data network and introduces the IP technology into the GSM network.

GSM

The Global System for Mobile Communications is originally developed as a pan-European standard for digital mobile telephony. GSM has become the world's most widely used mobile system. It is used on the 900 MHz, 1800 MHz, and 1900 MHz frequencies with the transmission rate as 9.6 kbit/s.

H Handover

A transfer of a user’s connection from one radio channel to another (can be the same or different cells).

R

Receive diversity

The most common type of diversity, where a mobile device uses two physically separate antennas to combine signals from the two antennas to reduce the impact of spatial variations in signal strength and thus increase the average data rate available - sometimes dramatically.

S SDH

Synchronous Digital Hierarchy. A communication transmission standard defined by the ITU-T. It is derived from the Plesiochronous Digital Hierarchy (PDH).

T TMA

Tower Mounted Amplifier. A low noise amplifier installed close to the antenna.

TRX

Transceiver. An entity that serves up to eight TCHFs in full-duplex mode. If the low-speed FH is not used, a transceiver serves one RF carrier.

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U Um interface

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Also called radio interface. An interface between the MS and the BSS.



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C

Acronyms and Abbreviations

A AMR

Adaptive MultiRate

B BSC

Base Station Controller

C CBUS

Control BUS

D DAFM

Antenna Front-end Module for DDRM BTS

EBMB

BTS3002E Module Backplane

DBUS

Data BUS

DDCM

Double Combining Module for DDRM BTS

DDPM

Dual Duplexer Module for DDRM BTS

DDRM

Double transceivers Digital and Radio frequency Module

DMCM

Main Control Module for DDRM BTS

DPSM

Power Supply Module for DDRM BTS

DSEM

DC SPD and EMI Module

E EDGE

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Enhanced Data rates for GSM Evolution

Huawei Technologies Proprietary


Page 55 of 57


EFR

Enhanced full rate speech codec

EGPRS

Enhanced GPRS

EMI

External Machine Interface

F FR

Frame Relay

G GMSK

Gaussian Minimum Shift-frequency Keying

GPRS

General Packet Radio Service

GSM

Global System for Mobile communications

H HR

Half Rate

M MMI

man-machine interactive

O OMC

Operation and Maintenance Center

R RF

Radio Frequency

RH

Relative Humidity

S SDH

Synchronous Digital Hierarchy

T TCH

Traffic Channel

TMA

Tower Mounted Amplifier

Issue 01 (2008-05-15)



Page 56 of 57


Issue 01 (2008-05-15)



Page 57 of 57

BTS3900 Product Description

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