Chapter 1 Introduction ....................................................................................
1-1
1.1 GSM/EDGE Network Current Status and Requirement ......................... 1.2 Product Orientation ................................................................................
1-1 1-2
Chapter 2 Characteristics ...............................................................................
2-1
2.1 BTS3X Technological Characteristics .................................................... 2.1.1 Integrated RF Component Technology .......................................... 2.1.2 Mature RF Technology .................................................................. 2.1.3 Advanced E-Abis Technology ........................................................ 2.1.4 Powerful O&M Functions ............................................................... 2.2 BTS3X Application Merits ....................................................................... 2.2.1 Large Capacity and Wide Coverage .............................................. 2.2.2 Expenditure Reduction................................................................... 2.2.3 Smooth Evolution ........................................................................... 2.2.4 Multiple Transmission Modes ........................................................
2-1 2-1 2-1 2-1 2-2 2-2 2-2 2-3 2-3 2-3
Chapter 3 Product Introduction ......................................................................
3-1
3.1 Cabinet Configuration ............................................................................. 3.1.1 BTS30 ............................................................................................ 3.1.2 BTS312 .......................................................................................... 3.1.3 BTS3012A ...................................................................................... 3.2 Board Description Table ......................................................................... 3.3 BTS3X System Architecture ...................................................................
3-1 3-1 3-2 3-3 3-4 3-5
Chapter 4 Major Functions .............................................................................
4-1
4.1 Basic Functions ...................................................................................... 4.2 Networking Functions ............................................................................. 4.2.1 E1 Networking ................................................................................ 4.2.2 SDH Networking ............................................................................ 4.3 Radio Network Functions ....................................................................... 4.3.1 Channels Supported ...................................................................... 4.3.2 Main Diversity Receiving................................................................ 4.3.3 Hopping.......................................................................................... 4.3.4 Power Control ................................................................................ 4.3.5 Discontinuous Transmission ..........................................................
4-1 4-1 4-2 4-3 4-3 4-3 4-4 4-5 4-5 4-6
Chapter 5 Reliability Design ...........................................................................
5-1
5.1 System Reliability Design ....................................................................... 5.1.1 Rating design ................................................................................. 5.1.2 Heat design .................................................................................... 5.1.3 EMC design ................................................................................... 5.1.4 System fault monitoring and handling ............................................
5-1 5-1 5-1 5-1 5-1
5.1.5 System fault protection .................................................................. 5.1.6 System maintainability design ........................................................ 5.1.7 Running environment protection design ........................................ 5.2 Hardware Reliability Design ................................................................... 5.2.1 Board Coding Key Design .............................................................. 5.2.2 Power System Reliability Design ................................................... 5.2.3 Abis Communication Bypass Design ............................................. 5.3 Software Reliability Design.....................................................................
5-1 5-2 5-2 5-2 5-2 5-2 5-3 5-3
Chapter 6 O&M System ...................................................................................
6-1
6.1 O&M Structure........................................................................................ 6.1.1 Overview ........................................................................................ 6.1.2 Local Maintenance ......................................................................... 6.1.3 Remote Maintenance ..................................................................... 6.2 O&M Functions....................................................................................... 6.2.1 Security Management .................................................................... 6.2.2 Alarm Management........................................................................ 6.2.3 Maintenance Management ............................................................ 6.2.4 Performance Measurement and Test ............................................
6-1 6-1 6-1 6-1 6-2 6-2 6-2 6-2 6-3
Chapter 7 Technical Indices ...........................................................................
7-1
7.1 Overall Engineering Indices ................................................................... 7.2 Overall Performance Indices .................................................................. 7.3 External Physical Interfaces ...................................................................
7-1 7-4 7-6
Appendix A Technical Specifications ............................................................
A-1
A.1 ITU and ETSI Standards ........................................................................ A.2 Abis Interface and Um Interface Specifications ..................................... A.3 Environment Adaptability Specifications ................................................ A.4 EMC Specifications ................................................................................ A.5 Lightning Protection Specifications ........................................................ A.6 Safety Standard .....................................................................................
A- 1 A- 2 A-2 A- 3 A- 3 A- 3
Appendix B Abbreviations ..............................................................................
B-1
5.1.5 System fault protection .................................................................. 5.1.6 System maintainability design ........................................................ 5.1.7 Running environment protection design ........................................ 5.2 Hardware Reliability Design ................................................................... 5.2.1 Board Coding Key Design .............................................................. 5.2.2 Power System Reliability Design ................................................... 5.2.3 Abis Communication Bypass Design ............................................. 5.3 Software Reliability Design.....................................................................
5-1 5-2 5-2 5-2 5-2 5-2 5-3 5-3
Chapter 6 O&M System ...................................................................................
6-1
6.1 O&M Structure........................................................................................ 6.1.1 Overview ........................................................................................ 6.1.2 Local Maintenance ......................................................................... 6.1.3 Remote Maintenance ..................................................................... 6.2 O&M Functions....................................................................................... 6.2.1 Security Management .................................................................... 6.2.2 Alarm Management........................................................................ 6.2.3 Maintenance Management ............................................................ 6.2.4 Performance Measurement and Test ............................................
6-1 6-1 6-1 6-1 6-2 6-2 6-2 6-2 6-3
Chapter 7 Technical Indices ...........................................................................
7-1
7.1 Overall Engineering Indices ................................................................... 7.2 Overall Performance Indices .................................................................. 7.3 External Physical Interfaces ...................................................................
7-1 7-4 7-6
Appendix A Technical Specifications ............................................................
A-1
A.1 ITU and ETSI Standards ........................................................................ A.2 Abis Interface and Um Interface Specifications ..................................... A.3 Environment Adaptability Specifications ................................................ A.4 EMC Specifications ................................................................................ A.5 Lightning Protection Specifications ........................................................ A.6 Safety Standard .....................................................................................
A- 1 A- 2 A-2 A- 3 A- 3 A- 3
Appendix B Abbreviations ..............................................................................
B-1
HUAWEI
M900/M1800 BTS3X Series Base Transceiver Station Technical Manual – System Description V300R003
M900/M1800 BTS3X Series Base Transceiver Station Technical Manual
Volume
System Description
Manual Version
T2-030219-20041112-C-3.30
Product Version
V300R003
BOM
31026319
Huawei Technologies Co., Ltd. provides customers with comprehensive technical support and service. Please feel free to contact our local office, customer care center or company headquarters.
Huawei Technologies Co., Ltd. Ad dr es s : Administration Building, Huawei Huawei Technologies Technologies Co., Co., Ltd., Bantian, Longgang District, Shenzhen, P. R. China Postal Code: 518129 Website: http://www.huawei.com Email:
[email protected] [email protected]
© 2004 Huawei Technologies Technologies Co., Ltd.
All Rights Reserved No part of this manual may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.
Trademarks
, HUAWEI, C&C08, EAST8000, HONET, TELLIN,
InfoLink,
, ViewPoint, INtess, ETS, DMC,
Netkey, Quidway, SYNLOCK, Radium,
M900/M1800,
TELESIGHT, Quidview, Musa, Airbridge, Tellwin, Inmedia, VRP, DOPRA, iTELLIN, HUAWEI OptiX, C&C08 iNET, NETENGINE, OptiX, iSite, U-SYS, iMUSE, OpenEye, Lansway, SmartAX, infoX, TopEng are trademarks of Huawei Technologies Co., Ltd. All other trademarks mentioned in this manual are the property of their respective holders.
Notice The information in this manual is subject to change without notice. Every effort has been made in the preparation of this manual to ensure accuracy of the contents, but all statements, information, and recommendations in this manual do not constitute the warranty of any kind, express or implied.
About This Manual Version The product version corresponds to the manual is M900/M1800 BTS3X Series Base Transceiver Station V300R003.
Organization The manual describes system description of BTS3X (including BTS30, BTS312, BTS3012A). There are seven chapters in the manual. Chapter 1 Introduction introduces the GSM/EDGE network current status and requirement and the product orientation of BTS3X. Chapter 2 Characteristics introduces the technological characteristics and the application merits of BTS3X. Chapter 3 Product Introduction introduces the cabinet configuration and the system architecture of BTS3X. Chapter 4 Major Functions introduces the basic functions, networking functions, radio network functions of BTS3X. Chapter 5 Reliability Design introduces the system reliability design, hardware reliability design and software reliability design. Chapter 6 O&M System introduces the structure and functions of the BTS3X operation and maintenance system. Chapter 7 Technical Indices introduces the technical indices of BTS3X.
Intended Audience The manual is intended for the following readers:
Technical marketing specialists
Installation engineers and technicians
Operation and maintenance personnel
Conventions
This manual uses the following conventions:
I. General conventions Convention
Description
Arial
Normal paragraphs are in Arial.
Arial Narrow
Warnings, Cautions, Notes and Tips are in Arial Narrow.
Boldface
Headings are in Boldface.
II. Symbols Eye-catching symbols are also used in the manual to highlight the points worthy of special attention during the operation. They are defined as follows:
Caution, Warning, Danger : Means reader be extremely careful during the operation.
Note, Comment, Tip, Knowhow, Thought: Means a complementary description.
Technical Manual - System Description M900/M1800 BTS3X Series Base Transceiver Station
Table of Contents
Table of Contents Chapter 1 Introduction.................................................................................................................. 1-1 1.1 GSM/EDGE Network Current Status and Requirement .................................................... 1-1 1.2 Product Orientation............................................................................................................ 1-2 Chapter 2 Characteristics............................................................................................................. 2-1 2.1 BTS3X Technological Characteristics ............................................................................... 2-1 2.1.1 Integrated RF Component Technology................................................................... 2-1 2.1.2 Mature RF Technology............................................................................................ 2-1 2.1.3 Advanced E-Abis Technology................................................................................. 2-1 2.1.4 Powerful O&M Functions ........................................................................................ 2-2 2.2 BTS3X Application Merits .................................................................................................. 2-2 2.2.1 Large Capacity and Wide Coverage ....................................................................... 2-2 2.2.2 Expenditure Reduction............................................................................................ 2-3 2.2.3 Smooth Evolution .................................................................................................... 2-3 2.2.4 Multiple Transmission Modes.................................................................................. 2-3 Chapter 3 Product Introduction ................................................................................................... 3-1 3.1 Cabinet Configuration ........................................................................................................ 3-1 3.1.1 BTS30 ..................................................................................................................... 3-1 3.1.2 BTS312 ................................................................................................................... 3-2 3.1.3 BTS3012A ............................................................................................................... 3-3 3.2 Board Description Table .................................................................................................... 3-4 3.3 BTS3X System Architecture .............................................................................................. 3-5 Chapter 4 Major Functions ........................................................................................................... 4-1 4.1 Basic Functions.................................................................................................................. 4-1 4.2 Networking Functions ........................................................................................................ 4-1 4.2.1 E1 Networking......................................................................................................... 4-2 4.2.2 SDH Networking...................................................................................................... 4-3 4.3 Radio Network Functions................................................................................................... 4-3 4.3.1 Channels Supported ............................................................................................... 4-3 4.3.2 Main Diversity Receiving......................................................................................... 4-4 4.3.3 Hopping................................................................................................................... 4-5 4.3.4 Power Control.......................................................................................................... 4-5 4.3.5 Discontinuous Transmission ................................................................................... 4-6 Chapter 5 Reliability Design......................................................................................................... 5-1 5.1 System Reliability Design .................................................................................................. 5-1 5.1.1 Rating design .......................................................................................................... 5-1 5.1.2 Heat design ............................................................................................................. 5-1
i
Technical Manual - System Description M900/M1800 BTS3X Series Base Transceiver Station
Table of Contents
5.1.3 EMC design............................................................................................................. 5-1 5.1.4 System fault monitoring and handling..................................................................... 5-1 5.1.5 System fault protection............................................................................................ 5-1 5.1.6 System maintainability design................................................................................. 5-2 5.1.7 Running environment protection design ................................................................. 5-2 5.2 Hardware Reliability Design............................................................................................... 5-2 5.2.1 Board Coding Key Design....................................................................................... 5-2 5.2.2 Power System Reliability Design ............................................................................ 5-2 5.2.3 Abis Communication Bypass Design ...................................................................... 5-3 5.3 Software Reliability Design................................................................................................ 5-3 Chapter 6 O&M System................................................................................................................. 6-1 6.1 O&M Structure ................................................................................................................... 6-1 6.1.1 Overview ................................................................................................................. 6-1 6.1.2 Local Maintenance .................................................................................................. 6-1 6.1.3 Remote Maintenance .............................................................................................. 6-1 6.2 O&M Functions .................................................................................................................. 6-2 6.2.1 Security Management ............................................................................................. 6-2 6.2.2 Alarm Management................................................................................................. 6-2 6.2.3 Maintenance Management...................................................................................... 6-2 6.2.4 Performance Measurement and Test ..................................................................... 6-3 Chapter 7 Technical Indices......................................................................................................... 7-1 7.1 Overall Engineering Indices............................................................................................... 7-1 7.2 Overall Performance Indices ............................................................................................. 7-4 7.3 External Physical Interfaces .............................................................................................. 7-6 Appendix A Technical Specifications .........................................................................................A-1 A.1 ITU and ETSI Standards ...................................................................................................A-1 A.2 Abis Interface and Um Interface Specifications ................................................................A-2 A.3 Environment Adaptability Specifications ...........................................................................A-2 A.4 EMC Specifications ...........................................................................................................A-3 A.5 Lightning Protection Specifications ...................................................................................A-3 A.6 Safety Standard................................................................................................................. A-3 Appendix B Abbreviations ...........................................................................................................B-1
ii
Technical Manual -S ystem Description M900/M1800 BTS3X Series Base Transceiver Station
Chapter 1 Introduction
Chapter 1 Introduction 1.1 GSM/EDGE Network Current Status and Requirement Since the mid of 1980s, public mobile communications have witnessed three generations of development with the further development of cellular networking technologies and the emergence of high-capacity mobile telecommunications system. The first generation is analog mobile telecommunications system, which only provides speech services using FDMA technologies. The second generation is the digital mobile telecommunications system, which appeared in 1990s with relevant standards including GSM, IS-95, etc. This system is used for speech services mainly and provides low speed circuit switched data services at the same time. At present, GSM communications network is applied across the world, and more and more people have recognized its big potential of development. In order to support data service, GSM developed GPRS (the General Packet Radio Service) which operates in the GSM band and allows the efficient use of the air interface by packet-oriented data transfer rather than permanent channel occupation. Concatenation all of channels results in potential peak data rates of more than 100kbps by GPRS. Now wireless communication is heading towards mobile date at an quickly increasing pace, this is the system of the Third Generation (3G): WCDMA and CDMA2000. But at the same time, GSM standardization develop an other system-EDGE(The Enhanced Data Rates for GSM Evolution) ,it is an upgrade of a GSM/GPRS infrastructure using the same radio resources. Due to the advanced modulation schemes, a higher data rateabout 480kbps can get under optimal radio conditions. So in the migration path from 2G to 3G, there will be EDGE/WCDMA and CDMA200, But WCDMA will provide the future proof evolution for GSM system with GPRS and EDGE. Up to now, we think that all operators are eager to build high quality communications network in a short term. The market requirement for large capacity BTS is becoming more and more urgent:
BTS of larger capacity is required due to the fact that the number of mobile users increases dramatically and the traffic intensity keeps rising.
Higher multiplexing ratio at the Abis interface is required due to expensive transmission resources.
It is required to reduce the equipment room size for the purpose of cost reduction.
Complicated transmission mode requires powerful BTS transmission adaptability and multiple built-in transmission equipment.
1-1
Technical Manual -S ystem Description M900/M1800 BTS3X Series Base Transceiver Station
Chapter 1 Introduction
The continuous expansion of GSM system requires that BTS be expanded flexibly and the existing investment be protected against waste during system expansion.
Service requirements of subscribers- keep increasing, which requires the BTS support more services.
Since the power supply system is unstable, power supply of BTS is required to adapt to a wider range of voltage fluctuation and to have certain protection mechanism which ensures fast BTS recovery after it is powered on again.
BTS is required to provide better voice quality and faster switchover.
At same time, all operators hope that networks need to evolve to new capabilities as smoothly as possible In the coming era of mobile multimedia services. Huawei also consider that GSM Base Station must be updated in a minimum investment ways to bring multimedia capability to existing networks quickly and keep the smooth evolution toward future. A series of macro cell GSM BTSs are developed by Huawei to meet the above requirements, which provide a network solution to convenient maintenance, operation and management to the client in densely populated areas and cities with large capacity requirement.
1.2 Product Orientation BTS3X is the series of macro cell BTS developed by Huawei. BTS series include indoor BTS30, BTS312 and outdoor BTS3012A, which meet requirements in multiple conditions. Table 1-1 is the brief introduction to BTS3X series. Table 1-1 BTS3X macro cell series BTS3X product model
Maximum number of TRXs of a single cabinet
Application
BTS30 (indoor BTS)
6TRX
Densely populated areas and cities
BTS312 (indoor BTS)
12TRX
Areas with high density and large traffic
BTS3012A (outdoor BTS)
12TRX
Hinterland, and areas with high environment requirement
BTS30 is the highly integrated indoor macro cell BTS with low power consumption, featuring small size, high reliability and flexible networking mode. It can be applied to most of the densely populated areas and cities. BTS312 is highly integrated indoor macro cell BTS with large capacity and low power consumption, which saves more room to facilitate expansion. It is mainly applied to support cells with high density and large traffic.
1-2
Technical Manual -S ystem Description M900/M1800 BTS3X Series Base Transceiver Station
Chapter 1 Introduction
BTS3012A is an outdoor macro cell BTS that can adapt to complex climate environment and electromagnetic environment. It features low cost, fast cite construction, high environment adaptability, and is the major supplement to indoor BTS. It provides a complete solution to the construction of seamless mobile communication network. BTS30/BTS312/BTS312 can support EDGE by adding EDGE TRX or replacing GSM TRX with EDGE TRX and upgrading the TMU software.
1-3
Technical Manual -S ystem Description M900/M1800 BTS3X Series Base Transceiver Station
Chapter 2 Characteristics
Chapter 2 Characteristics 2.1 BTS3X Technological Characteristics BTS3X series are designed as a typical all-in-one BTS by taking full consideration of the requirements of capacity, configuration, installation, power supply, transmission, and services. Its characteristics are as follows.
2.1.1 Integrated RF Component Technology
Expansion based on the inheritance of the investment: BTS expansion can make the utmost of all the antenna and feeder parts.
Modular structure with good performance: RF combiner, divider and low noise amplifier are integrated in CDU (Combining and Distribution Unit). All parts for TRX
processing
including
baseband
processing,
RF
processing,
power
amplification and power supply are all integrated in one TRX (Transceiver unit). Modular structure can reduce internal cable connections, improve system reliability and facilitate installation and maintenance. EDGE transceiver uses the same modular structure as GSM normal transceiver.
Intelligent CDU: Fine monitor and control function, excellent O&M, level 2 standing wave ratio alarm, low noise amplifier alarm, TTA (Tower Top Amplifier) alarm,
TTA
power
supply.
Auto
protection
against
emergency:
Close
transmission power when transmit path antenna feeder is abnormal; power off to bypass LNA (Low Noise Amplifier) when TTA is abnormal so as to ensure normal system operation. Receive gain can be adjusted via remote control to ensure the sensitivity of the receive system.
2.1.2 Mature RF Technology
RF hopping and baseband frequency hopping are provided to improve system anti-interference capability. It has good performance in practical application.
Advanced digital RF technology is adopted to raise batch consistency, manufacture scalability and stability of the RF system.
2.1.3 Advanced E-Abis Technology The E-Abis (Enhanced Abis) supports various transmission modes and complex topologies, e.g. SDH, E1, microwave, etc. The E-Abis includes the f ollowing techniques:
2-1
Technical Manual -S ystem Description M900/M1800 BTS3X Series Base Transceiver Station
Chapter 2 Characteristics
APL (Advanced Phase Locking) technique solves the problem of clock jittery, by using high-precision clock and characteristic software phase lock technique. The problem such as SDH clock phase jittery is solved.
With a tolerance of up to a bit error rate of 1E-4, i.e. 2 levels higher than the common 1E-6 bit error rate, a better and smooth voice quality can be obtained even in transmission through microwave.
The system can tolerate a intermittent link failure of less than 2 seconds, which makes the BTS30 more suitable for applications in unstable conditions such as SDH transmission switching, microwave etc.
The E-Abis use more efficient dynamic allotting algorithm to support EDGE.
2.1.4 Powerful O&M Functions BTS3X can perform the following O&M functions: software downloading, BTS object attribute configuration management, equipment management and running status monitoring.
Local end maintenance: provide man machine interface (MMI), and implement maintenance, monitoring and management to all objects of the BTS through the local end maintenance console.
Remote end maintenance: O&M network is made in the GSM system. The authorized user can use any workstation in the network via the remote maintenance console to perform remote O&M to BTS NEs in the system.
System state monitoring provides system running indices indication, resource state indication.
Security management provides MS login authentication, command authority restriction, unsecured operation indication and user group management.
Test: self-test of functions, loop-back test.
Upgrade: automatically check the system for upgrade. System upgrading can be performed via remote loading. The system can be restored to its previous version if system upgrading fails.
2.2 BTS3X Application Merits 2.2.1 Large Capacity and Wide Coverage
Large capacity of a single cabinet: BTS30 can support 6 TRXs in the full configuration mode, while both BTS312 and BTS3012A can support 12 TRXs in the full configuration mode.
When configuring TRX, the nominal value of transmission power at the cabinet feeder port is 40W (or 60W). When PBU (Power Boost Unit) is equipped, the nominal value of transmission power can reach 80W; When EDU (Enhanced
2-2
Technical Manual -S ystem Description M900/M1800 BTS3X Series Base Transceiver Station
Chapter 2 Characteristics
Duplexer Unit) is adopted, the RF signal combining consumption can be reduced and the BTS coverage can be expanded.
Support dual timeslot expansion function (Theoretically, a maximum coverage of 120km can be supported).
2.2.2 Expenditure Reduction
It supports multiplexing of 15:1, hence greatly reducing transmission expenditure.
Transmission equipment such as SDH is integrated, providing a solution for future upgrade and wideband radio access and reducing transmission equipment investment.
High reliability: Centralized power supply while providing power to various modules in a distributed way. BTS30 and BTS312 can provide DC +24V, DC 48V and AC 220V to satisfy different power supply requirement.
High BTS3012A outdoor adaptability, hence greatly reducing affiliated equipment expenditure: o
o
-Working temperature range: -55 C~+55 C (environment temperature). -Voltage range: 150VAC~300VAC. -Designs for waterproof, dustproof, moisture proof, acid proof, mildewproof, and ultraviolet radiation protection. -Built-in storage battery power supply can ensure normal working of BTS when public power supply is stopped. -Room of standard 19 inches wide, 5Us high (5 ×44.45mm), 310mm deep is reserved together with microwave, SDH and HDSL cable outlet. Small built-in microwave, SDH and HDSL transmission equipment can be selected.
2.2.3 Smooth Evolution BTS3X series can support:
Mixed dual band plug-in of 900MHz and 1800MHz modules of 6 cells.
GPRS (General Packet Radio Service), which helps to realize smooth evolution from 2G to 2.5G.
BTS3X support EGPRS (General Packet Radio Service) by changing TRX Unit and upgrading TMU software.
EDGE (Enhanced Data Rates for GSM Evolution) which helps to realize smooth evolution from GSM/GPRS to WCDMA/EDGE.
2.2.4 Multiple Transmission Modes
Multiple built-in transmission modes: 75 Ω /E1, 120 Ω/E1 and SDH. The BTS has powerful transmission adaptability. 2-3
Technical Manual -S ystem Description M900/M1800 BTS3X Series Base Transceiver Station
Chapter 2 Characteristics
Transmission equipment such as microwave and HDSL can be built in BTS3012A. The transmission mode can be freely selected according to user requirement.
2-4
Technical Manual -S ystem Description M900/M1800 BTS3X Series Base Transceiver Station
Chapter 3 Product Introduction
Chapter 3 Product Introduction 3.1 Cabinet Configuration The following is the introduction to typical single cabinet configuration of BTS30, BTS312 and BTS3012A. BTS3X adopts modular RF structure. Clients can configure the boards according to the actual site condition by following certain configuration rule.
3.1.1 BTS30 BTS30 size: 1,600mm (H) × 600mm (W) × 450mm (D) Full configuration of BTS30 single cabinet is shown in Figure 3-1. In the figure, BTS30 is configured with 3 CDUs, 6 TRXs, 4 PSUs, 1 PMU, 2 TMUs, 1 TES and 1 TEU.
3-1
Technical Manual -S ystem Description M900/M1800 BTS3X Series Base Transceiver Station
Chapter 3 Product Introduction
Switch Box
RX
RX
RX
TX
TX
TX
CDU
CDU
CDU
TX
TX
TX
RX
TX
RX
RX
TX
RX
RX
TX
RX
TRXTRXTRXTRXTRXTR X
Fan Box
P
P
P
P
P
T T TT
S
S
S
S
M
M M EE
U
U
U
U
U
U U SU
Air Inlet
Figure 3-1 Typical configuration of BTS30
3.1.2 BTS312 BTS312 size: 1,880mm (H) × 650mm (W) × 500mm (D) Full configuration of BTS312 single cabinet is shown in Figure 3-2. In the figure, BTS312 is configured with 6 CDUs, 12 TRXs, 6 PSUs, 1 PMU, 2 TMUs, 1 TES and 2 TEU.
3-2
Technical Manual -S ystem Description M900/M1800 BTS3X Series Base Transceiver Station
Chapter 3 Product Introduction
Switch Box Fan Box
TX RX
TX
TX
TX
RX
RX TX
RX
RX
RX
TX
CDU
CDU
TR XTRXTR XTRX
Air Trough
TX RX
TX
TX
TX
RX
RX TX
RX
RX
RX
TX
CDU
CDU
TR XTRXTR XTRX
Fan Box
Fan Box
TX RX
TX
TX
TX
RX
RX TX
RX
RX
RX
TX
CDU
CDU
TR XTRXTR XTRX
P
P
P
P
P
P
P
T T TT T
S
S
S
S
S
S
M
M M EE E
U
U
U
U
U
U
U
UU SUU
Air Inlet
Figure 3-2 Typical configuration of BTS312
3.1.3 BTS3012A BTS3012A size: 1,995mm (H) × 1,300mm (W) × 870mm (D)
3-3
Technical Manual -S ystem Description M900/M1800 BTS3X Series Base Transceiver Station
Chapter 3 Product Introduction
Full configuration of BTS3012A single cabinet is shown in Figure 3-3. BTS3012A is composed of main equipment cabinet and accessory equipment cabinet. As shown in the figure, the main equipment cabinet is configured with 6 CDUs, 12 TRXs, 6 PSUs, 1 PMU, 1 TMU, 1 TCU and 1 ABB. The accessory equipment cabinet is configured with storage battery, air conditioner regulator, AC & DC power distribution device, microwave device, lightningproof device, etc.
Figure 3-3 Typical configuration of BTS3012A
3.2 Board Description Table Table 3-1 is the board description table of BTS3X.
3-4
Technical Manual -S ystem Description M900/M1800 BTS3X Series Base Transceiver Station
Chapter 3 Product Introduction
Table 3-1 Board description table Board abbreviation
Full name
ABB
Abis Bypass Board
ASU
Access network SDH transmission Unit
CDU
Combining and Distribution Unit
EDU
Enhanced duplexer unit
PAT
Passive Transmission Board
PBU
Power Boost Unit
PMU
Power Monitor Unit
PSU
Power Supply Unit
SCU
Simple combining Unit
TCU
Temperature Control Unit
TDU
Time Distribution Unit
TEU
Transmission Extension Unit
TES
Transmission Extension power Supply unit
TMU
Timing/Transmission and Management Unit
TRX
Transceiver unit
3.3 BTS3X System Architecture The main functions of BTS3X are: connecting with BSC (Base Station Controller) via the Abis interface to coordinate with BSC in radio resource management, radio parameter management and interface management, and communicating with MS (Mobile Station) via the Um interface to realize radio transmission and related control between BTS and MS. The system architecture of BTS30/312 when equipped with TEU and TES is shown in Figure 3-4.
3-5
Technical Manual -S ystem Description M900/M1800 BTS3X Series Base Transceiver Station
Chapter 3 Product Introduction
External Alarm
Abis
Um CBUS/TBUS/DBUS
TDU
TTA
TTA
TTA
TTA
TTA
TTA
CDU
TRX FHBUS
BSC
E1
TMU
Optical Fiber (optional)
TRX TEU
PSU
CDU
TES
PMU
TRX
CDU
FMU Signal Processing Subsystem
Common Subsystem
Feeder Subsystem
Figure 3-4 BTS30/312 system architecture
The following are explanation of the above figure: 1)
The boards indicated by dashed line block are optional:
There are 2 TMU slots on BTS30/312 working in active/standby mode. The standby TMU can be configured as required.
Configuration of TEU and TES can provide built-in optical transmission function, while configuration of ABB can provide Abis bypass function. Since ABB occupies the slot of TEU, only one of the above functions can be selected.
Generally triplex TTA is adopted.
2)
TEU is the generic term for boards realizing multiple optical transmission modes, which includes boards ASU and PAT that provide 155M SDH and passive optical transmission separately.
3)
The system architecture of BTS3012A is similar to that of BTS30/312. They only differ in common subsystem architecture. Figure 3-5 shows the common subsystem logical architecture when ABB is adopted. BTS3012A can only support configuration of one TMU, and it can adopt ABB, but does not support configuration of TEU or TES.
3-6
Technical Manual -S ystem Description M900/M1800 BTS3X Series Base Transceiver Station
Chapter 3 Product Introduction
Abis
TMU E1
ABB PMU
PSU
FMU Common Subsystem
Figure 3-5 BTS3012A common subsystem architecture
Note: Abis transmission bypass function refers to that in BTS chain networking environment, when the site (excluding the last level) adopting ABB is powered down, ABB is responsible to bypass the site on the Abis transmission line so as to keep the working of other sites on the Abis transmission line normal. When ABB is located in the last level site of the chain networking environment, if the site is powered down, ABB is responsible to loop back the Abis transmission line.
BTS3X series are composed of the following subsystems:
I. Common subsystem The common subsystem is composed of boards such as TMU, PSU and PMU. It performs the following functions:
Manage and control other subsystems and modules, and collect alarm information.
Provide multiple basic clocks for other subsystems and modules.
Communicate with the O&M system.
Signaling processing and resource management.
Supply power to the integrated equipment and provide power monitoring and management.
Provide multiple built-in transmission interfaces.
II. Signal processing subsystem Signal processing subsystem is composed of TRX (Normal GSM TRX or EDGE TRX) and CDU boards. It performs the following functions:
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Chapter 3 Product Introduction
1)
GMSK/8PSK modulation ,demodulation and equalization
2)
Channel encoding and decoding, interleaving and de-interleaving.
3)
Speech encryption and decryption.
4)
Rate adaptation.
5)
Mapping between logical channel and radio channel.
6)
Inter-cell handover and intro-cell handover.
7)
Signal up/down convert, sampling, filtering and amplification.
III. Feeder subsystem The feeder subsystem is composed of antennas, feeders, jumpers, lightning arrester and TTA (optional). It performs the following functions:
Transmit RF signals.
Receive signals from MS.
Amplify uplink signals received.
Prevent damage to the equipment by lightning current.
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Chapter 4 Major Functions
Chapter 4 Major Functions 4.1 Basic Functions Basic functions of BTS3X series:
GSM900/1800 services
All data services prescribed in Phase II+
GPRS services
EGPRS services
Phase I/Phase II /Phase II+ compatible LAPDm protocol
CS-1/CS-2/CS-3/CS-4 radio channel coding scheme
MCS1/MCS2/MCS3/MCS4/MCS5/MCS6/MCS7/MCS8/MCS9
radio
channel
coding scheme
Phase I/Phase II/ Phase II+ compatible system information broadcasting and resource indication
Enhanced full rate (EFR) speech coding scheme with better speech quality
Broadcast short message and point-to-point short message
Paging queue
A5/1, A5/2 encryption/decryption
Basic data dynamic configuration
Dynamic resource management
Measurement report preprocessing
Immediate assignment combination and paging combination, boosting the radio channel efficiency
Discontinuous transmission(DTX) enhancing the anti-interference ability and reducing the power consumption
Omni cell and directional cell
Support locked, fast pull-in, holdover and free run clock modes
Synchronous, asynchronous and quasi-synchronous handover
Um interface tracing and internal interface tracing
Remote and local loading of software
Dynamic and static power control
4.2 Networking Functions BTS3X has flexible networking modes. It can support multiple transmission modes: E1, SDH, HDSL and microwave.
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Chapter 4 Major Functions
4.2.1 E1 Networking When networked via E1, BTS3X supports star, tree and chain networking. E1 networking is shown in Figure 4-1, Figure 4-2, and Figure 4-3, where each line indicates a bi-directional E1 line.
I. Star networking
BTS
BSC
BTS
BTS
Figure 4-1 BTS3X E1 star networking
II. Tree networking
BTS
BTS
BTS BSC
BTS
Figure 4-2 BTS3X E1 tree networking
III. Chain networking
BSC
BTS
BTS
Figure 4-3 BTS3X E1 chain networking
4-2
BTS
Technical Manual -S ystem Description M900/M1800 BTS3X Series Base Transceiver Station
Chapter 4 Major Functions
4.2.2 SDH Networking When networked via SDH, BTS3X supports chain and ring networking. SDH networking is shown in Figure 4-4 and Figure 4-5, where each line indicates an E1, and each pair of lines indicates a pair of optical fibers.
I. Chain networking
Optical Transceiver
BSC
BTS
BTS
Figure 4-4 BTS3X SDH chain networking
II. Ring networking
BSC
Optical Transceiver
BTS
Figure 4-5 BTS3X SDH ring networking
4.3 Radio Network Functions 4.3.1 Channels Supported I. Channel types supported
TCH/EFS: Enhanced Full rate Speech Traffic CHannel
TCH/FS: Full rate Speech Traffic CHannel
TCH/HS: Half rate traffic channel for speech
TCH/F9.6: Full rate 9.6kbit/s Traffic Channel
TCH/F4.8: Full rate 4.8kbit/s Traffic CHannel
TCH/F2.4: Full rate ≤2.4kbit/s Traffic Channel
PDTCH/F: Full rate packet data traffic channel
FCCH: Frequency Correction CHannel
SCH: Synchronization CHannel
BCCH: Broadcast Control CHannel
PCH: Paging Channel
RACH: Random Access CHannel
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BTS
Technical Manual -S ystem Description M900/M1800 BTS3X Series Base Transceiver Station
Chapter 4 Major Functions
AGCH: Access Grant CHannel
PPCH: Packet Paging channel
PRACH: Packet Random access channel
PRAGCH: Packet Access grant channel
PTCCH: Packet Timing advance control channel
SDCCH/8: Stand-alone Dedicated Control CHannel, eight of them mapped on a separate basic physical channel
SACCH/C8: Slow SDCCH/8 Associated Control CHannel
SACCH/TF: Slow TCH/F Associated Control CHannel
FACCH/F: Full rate Fast Associated Control CHannel
SDCCH/4: Stand-alone Dedicated Control CHannel, four of them mapped on the same basic physical channel as the CCCH
SACCH/C4: Slow, SDCCH/4 Associated Control CHannel
CBCH: Cell Broadcast Channel
II. Channel combinations supported
TCH/F + FACCH/F + SACCH/TF
TCH/H(0,1) + FACCH/H(0,1) + SACCH/TH(0,1)
TCH/H(0,0) + FACCH/H(0,1) + SACCH/TH(0,1) + TCH/H(1,1)
FCCH+SCH+BCCH+CCCH
FCCH+SCH+BCCH+CCCH+SDCCH/4+SACCH/C4
BCCH+CCCH
SDCCH/8+SACCH/8
SDCCH/8+SACCH/8+CBCH
FCCH+SCH+BCCH+CCCH+SDCCH/4+SACCH/C4+CBCH
PBCCH+PCCCH+PDTCH+PACCH+PTCCH
PCCCH+PDTCH+PACCH+PTCCH
PDTCH+PACCH+PTCCH
Note:
CCCH=PCH+RACH+AGCH
PCCCH=PPCH+PRACH+PAGCH
4.3.2 Main Diversity Receiving A radio channel is a random time-variable channel with fading features, while the diversity receiving technology is an effective anti-fading technology. Radio signals that are transmitted to RX through radio channels are combination of various multipath components. These signals carry the same message and are featured with irrelevant
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Chapter 4 Major Functions
random fading characteristics. By the diversity receiving technology these signals can be combined into general receiving signals so as to diminish the impact caused by fading. The
diversity
receiving
methods
include
frequency
diversity,
time
diversity,
polarization diversity and space diversity. In BTS3001C, polarization diversity, space diversity and frequency diversity are used to diminish the signal fading.
4.3.3 Hopping Frequency hopping is an important method to improve the performance of a BTS. It can not only improve the anti-fading capability of uplink and downlink channels, but also improve the security in communications. BTS3X can provide baseband frequency hopping and RF hopping. RF hopping adopts dynamic loop bandwidth technology and Ping-Pong handover technology to realize realtime switchover between two frequency synthesizers. When frequency hopping is not performed, one channel of transceiver local oscillator is backup so as to raise system reliability.
4.3.4 Power Control When the distance between the MS and BTS3X changes, the BSC/BTS can adjust the transmission power of BTS3X accordingly. Each level of power control adopts APC (Automatic Power Control) technology to minimize the power error at each level. When the timeslot is idle, since there is no downlink signal, the BSC will command BTS3X to close the transmission power of the timeslot. Power control function can raise the efficiency of transmitter and the reliability of power amplifier, and minimize the interference of transmitter. There are 10 BTS3X static power levels: level 0~9, descending with 2dB per level. The maximum output power of BTS is level 0. For example, in the case the maximum output power of BTS30 is 40W, level 0 corresponds to 46dBm, while level 9 corresponds to 28dBm. BTS dynamic power control is fine-tune based on static power control. There are 15 BTS3X dynamic power control levels: level 0~15, in descending sequence, where level 0 is the same as that of static power control level. If the "Current maximum transmission power" is Pm, the range of dynamic power control is Pm~(Pm-30)dBm. When dynamic power control reaches the maximum but still cannot meet the requirement, the static power control should be adjusted so as to raise the maximum output power of dynamic power control.
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Chapter 4 Major Functions
4.3.5 Discontinuous Transmission There are two transmission modes in the GSM system: One is the normal mode, in which noise has the same transmission quality as voice; the other is discontinuous transmission (DTX) mode, in which MS only sends the encoded background noise that is called "comfortable noise". The utilization of DTX can meet t he requirement for system measurement and can make the called feel that the call is not disconnected. BTS3X adopts Voice Activation Detection technology (VAD) to distinguish voice from noise.
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Chapter 5 Reliability Design
Chapter 5 Reliability Design 5.1 System Reliability Design 5.1.1 Rating design Strict rating-lowering design is adopted for power and easily overheated devices to make the electrical stress and temperature stress in practical utilization lower than the set rating, hence postponing degradation of parameters and prolonging their life span.
5.1.2 Heat design By parts selection, circuit and structure design and heat dissipation design, the impact of temperature change on product performance is reduced and reliable operation of the product in a wider temperature range is ensured.
5.1.3 EMC design ElectroMagnetic compatibility (EMC) design prevents equipment from inhibited degradation caused by electromagnetic transmission of other equipment in the same electromagnetic environment. It also prevents other equipment, subsystems, systems in the same electromagnetic environment from inhibited degradation caused by the electromagnetic transmission of the equipment.
5.1.4 System fault monitoring and handling The system can auto test and diagnose software and hardware fault, and report alarms. It can record and output the fault records for print. It collects environment conditions and report alarms when it detects problems. When TMU is faulty, the system can test the major faults and report alarms while keeping the communication between BTS and BSC.
5.1.5 System fault protection Fault of any module will not lead to destructive fault of other modules and major faults can be reported in time.
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Chapter 5 Reliability Design
5.1.6 System maintainability design Reasonable BTS internal cabling facilitates board replacement during fault handling. Only cables of the faulty boards are disconnected. When replacing boards, main boards can be plugged in or pulled out from the front of the cabinet. Meanwhile, simple indicator flashing state helps to judge whether the equipment operation is normal.
5.1.7 Running environment protection design The system has input over-/under-voltage protection, output over-voltage protection, output short-circuited, output overload and excess temperature protection for PSU and transmission power. For DC input transmission power, it has input reverse polarity protection to guarantee system safety.
5.2 Hardware Reliability Design 5.2.1 Board Coding Key Design When a functional board is mistakenly inserted into the slot of functional board of another kind, since coding key is adopted, the mistakenly inserted board cannot normally contact with the backplane, hence protecting the equipment against being damaged.
5.2.2 Power System Reliability Design I. Continuous power supply design For BTS using AC power supply, when external mains supply is powered off, outdoor BTS can work for some time by using the storage battery equipped to keep the operation of equipment during this time. And it will send mains supply power off alarm signal to the BAM in the meantime, and handle the alarm basing on the actual situation. BTS3012A is built in with transmission power to provide -48V power for transmission equipment. To improve reliability, 1+1 backup working mode may be adopted for the transmission power. When one of the modules is faulty, it will automatically exit the power supply system, while another module will provide output to all -48V load and send module faulty alarm information to the BAM.
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Chapter 5 Reliability Design
II. Distributed power supply design Distributed power supply for load is adopted inside the system. The key power supply path, AC/DC part, adopts N+1 backup working mode. If one of the modules in AC/DC part is faulty, alarm information can be sent to the BAM, and onsite hot swappable replacement is supported.
5.2.3 Abis Communication Bypass Design When BTS is in chain networking environment and its power fails, the Abis transmission bypass board in the BTS can bypass the transmission line of TMU board internally, hence avoiding long-time service disruption of all the sites under this BTS.
5.3 Software Reliability Design I. Scheduled check of key resources For software resources in the system, the long-time occupation verifying mechanism is applied among the modules. In case of resource unavailable due to software exception, the verifying mechanism can ensure the release of unavailable resources and the output of various logs and alarms.
II. Fault isolation feature Software design has module fault isolation function. The error in some software module will be restricted in the module only and will not lead to fault of other software module. Software has fault tolerant and error correction capability. Minor software running exception will not cause system restart or reset.
III. Data check
Consistency check of user input data guarantees the correctness of reference relation among the data.
When the system detects data modification failure in some stage, it will restore the related data to initial state to ensure data consistency.
IV. Process monitoring In software operations, output channels are provided for software internal errors and part of hardware errors, which are called process monitoring mechanism. This mechanism can monitor the running state of tasks, handle system abnormalities and report to the external devices.
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Chapter 6 O&M System
Chapter 6 O&M System 6.1 O&M Structure 6.1.1 Overview BTS can provide two maintenance modes: local maintenance and remote maintenance, as shown in Figure 6-1.
OMC
MMI
Server Local Maintenance Console
A b i s BTS
b i s A
MMI
Remo te Maintenance
BSC Rem ote Maintenance Console
BTS
Hub
Console
Figure 6-1 BTS O&M structure
6.1.2 Local Maintenance Local maintenance refers to the maintenance mode in which PCs are connected to BTS by serial port cables and implement maintenance operations to the BTS, as shown in Figure 6-1. The local maintenance console can only be accessed after the local maintenance software is installed in PCs. The BTS local maintenance is carried out based on different logical objects of the BTS, which include site, cell, carrier, and baseband. Direct operations can also be performed on boards. Real-time alarm messages can be obtained at the same time.
6.1.3 Remote Maintenance Remote maintenance is performed through OMC. PCs are connected to BSC via OMC network and are connected subsequently to BTS via the Abis interface, as shown in Figure 6-1.
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Chapter 6 O&M System
The remote maintenance console can only be accessed via OMC Shell of the workstation (WS). The user interface of the BTS remote maintenance system is in topological structure, where names, categories, locations, numbers, equipment types and running states (normal, alarm, etc.) of all NEs in the mobile network can be browsed. The user can specify a NE to be maintained and check detailed performance data, alarm data and configuration data. He can also implement O&M to certain type of NEs through the topological map.
6.2 O&M Functions BTS3X O&M system provides the user with powerful O&M functions in consideration of the user’s requirements in equipment performance and maintenance. These include security management, alarm management, maintenance management, performance measurement and test, etc.
6.2.1 Security Management In view of various remote maintenance operations implemented by the O&M system, the system provides powerful security management system to execute O&M control over the equipment in order to avoid unauthorized operations which may affect normal performance of the equipment. The user must log in and go through authentication before performing O&M to BTS. The system provides an authorization system with multiple levels to ensure that only authorized users can execute relevant commands for O&M. Meanwhile, dialog boxes are prompted before any important O&M command is executed to get confirmation for the potential problems due to the operations.
6.2.2 Alarm Management BTS O&M system provides highlighted alarm windows and powerful real-time alarm management functions, such as collection, clearing, query, processing, saving, explanation, prompting, shielding, filtering, acknowledging, analyzing, etc. Besides, it also provides on-line help information system and stage filtering system to help the user quickly locate faults. I t also provides alarm recovery methods.
6.2.3 Maintenance Management The operation & maintenance center (OMC) implements management over the whole BSS through BSC. BTS can perform check and location functions for internal errors so that BSC can implement maintenance to it without knowing the internal structure of each BTS.
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The O&M system can monitor and query the states of
Chapter 6 O&M System
boards and the system,
keeping the user aware of the system running states. It supports automatic backup of data with backup time intervals. It also supports reset of key parts and activation of software.
6.2.4 Performance Measurement and Test The O&M system can implement performance measurement and test to the entities so as to collect BTS running states data and perform accurate analysis on the running states.
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Chapter 7 Technical Indices
Chapter 7 Technical Indices 7.1 Overall Engineering Indices Table 7-1 BTS30 integrated equipment engineering indices Parameter name
Index
Cabinet size (height%width%depth)
1600mm%600mm%450mm
Weight
180kg (single cabinet in full configuration mode) 1200W (single cabinet in full GSM Normal TRX configuration mode)
Power consumption 1400W (single cabinet in full EDGE 900M TRX configuration mode) Working environment temperature
-5C~+45C
Working environment relative humidity
15%~85% Frequency: 1.3%107Hz, with precision at delivery higher than 0.05ppm
Clock
Frequency Vs Temperature: <±5%10-8 (0C ~70C) Annual aging rate:< ±1%10-7 220 V AC: 150~280VAC/47~63Hz
Input power supply
-48VDC: –40~-60VDC 24VDC: 19~29VDC
Security performance
In compliance with IEC60950 standard
Earthquake-proof performance
In compliance with IEC Class 4M3 standard
EMC
In compliance with ETS 300-342-3 corresponding standard
Table 7-2 BTS312 integrated equipment engineering indices Parameter name
Index
Cabinet size (H×W×D)
1880mm%650mm%500mm
Weight
330kg (single cabinet in full configuration mode)
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Parameter name
Chapter 7 Technical Indices
Index 2400W (single cabinet in full GSM Normal TRX configuration mode)
Power consumption 2800W (single cabinet in full EDGE 900M TRX configuration mode) Working environment temperature
-5C~+45C
Working environment relative humidity
15%~85% Frequency: 1.3%107Hz, with precision at delivery higher than 0.05ppm
Clock
Frequency Vs Temperature: <±5%10-8 (0C~70C) Annual aging rate:< ±1%10-7 220 V AC: 150 ~ 280 V AC, 47 ~ 63 Hz.
Input power
-48VDC -40~-60VDC 24VDC: 19~29VDC
Security
In compliance with IEC60950 standard
Earthquake-proof performance
In compliance with IEC Class 4M3 standard
EMC
In compliance with ETS 300-342-3 related standard
Table 7-3 BTS3012A integrated equipment engineering indices Parameter name
Index
Cabinet size (H×W×D)
1995mm%1300mm%870mm
Weight
850kg Built-in devices/full GSM Normal TRX configuration: 3500W Built-in devices/full EDGE Normal TRX configuration: 3900W
Power consumption Air conditioning unit: 1500W (cooling); 2500W (heating) Total: 5120W (cooling); 6120W (heating) Working environment temperature
-40C~+55C
Startup temperature
-40C ~+55C
Storage temperature
-40C~+70C
Working environment relative humidity
5%~100%
Clock
Frequency: 1.3%107Hz, with precision at delivery higher than 0.05ppm Frequency Vs Temperature: <±5%10-8 (0C~70C)
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Parameter name
Chapter 7 Technical Indices
Index Annual aging rate:< ±1%10-7
Input power
150 ~ 300 V AC, 47 ~ 63 Hz.
Security
In compliance with IEC60950 standard
Earthquake-proof performance
In compliance with IEC Class 4M3 standard
EMC
In compliance with ETS 300-342-3 related standard
Waterproof and dustproof performance
In compliance with IP55 standard
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Chapter 7 Technical Indices
7.2 Overall Performance Indices Table 7-4 Performance Indices of integrated equipment Performance classification
Parameter name
Index
Channel capacity
8TCH/TRX GSM900: Uplink: 890MHz ~ 915MHz Downlink: 935MHz ~ 960MHz EGSM900:
System indices Frequency band
Uplink: 880MHz ~ 915MHz Downlink: 925MHz ~ 960MHz GSM1800: Uplink: 1,710MHz ~ 1,785MHz Downlink: 1,805MHz ~1,880MHz GSM900: -110dBm(TCH/FS)
Static receive sensitivity GSM1800: -109dBm(TCH/FS) Receiving performance
Transmitting performance
Block feature
Satisfy requirement of GSM11.21 protocol
Anti-interference feature
Satisfy requirement of GSM11.21 protocol
Intermodulation suppression
Satisfy requirement of GSM11.21 protocol
Stray radiation
Satisfy requirement of GSM11.21 protocol GSM Normal TRX: 47.78dBm/ 46dBm
Nominal value of transmission power of each TRX
EDGE TRX:GMSK 47.78dBm,8PSK:46dBm TRX+PBU: 49dBm
Absolute transmission power precision
±2dBm
Static power control range
Level 0~9, step 2±1dB
Dynamic power control range
Level 0~15, step size 2±1dB
Transmit spectrum
Satisfy requirement of GSM11.21 protocol
Intermodulation suppression
Satisfy requirement of GSM11.21 protocol
Stray radiation
Satisfy requirement of GSM11.21 protocol
Frequency error
0.05ppm
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Performance classification
Chapter 7 Technical Indices
Parameter name
Index 5 (rms)
Phase error 20 (peak) 7 %(RMS EVM) EVM
22% (Peak EVM) 11% 95:th percentile EVM
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Chapter 7 Technical Indices
7.3 External Physical Interfaces Table 7-5 External physical interfaces of BTS30 and BTS312 Interface
Type
Quantity
Function realized Provide 75Ω/120Ω E1 interface
E1
8 pairs
Support cascading Provide O&M link (OML)
Abis interface Provide 75Ω E1 interface SDH
2 pairs
Support cascading Provide O&M link (OML)
FCLK
1
FCLK test port
13MCLK
1
13MHz clock test port
MMI Serial port
1
Provide local maintenance channel
Clock interface (CLK) Maintenance interface
-48VDC input power Power and grounding
3 power input modes
Power supply
+24VDC input power 220VAC input power
Feeder cable interface
Combined cabinet interface
Grounding
1
PGND
RF signal
12
Feeder input port
Data bus interface
2
Clock bus interface
2
Combined cabinet cascading interface
6
Data bus interface DCF1 and DCF2 Combined cabinet clock bus interface CKB1 and CKB2 CDU combined cabinet cascading interface
Alarm
External alarm interface EAC1 and EAC2
2
Management signal interface
Storage battery management
7-6
1
Can be connected to environment monitor
Connect to storage power pool signal PWRC
Technical Manual -S ystem Description M900/M1800 BTS3X Series Base Transceiver Station
Chapter 7 Technical Indices
Table 7-6 BTS3012A external physical interfaces Interface
Type
Quantity
Function realized Provide 75Ω/120Ω E1 interface
E1
4 pairs
Abis interface
Support cascading Provide O&M link (OML)
Clock interface (CLK) Maintenance interface
Microwave
4 pairs
Provide microwave transmission mode
FCLK
1
FCLK test port
13MCLK
1
13MHz clock test port
MMI serial port
1
Provide near end maintenance channel
Power supply
1
PGND
2
Power and grounding
Feeder cable interface
RF signal
12
7-7
220VAC input power Include L (live line), N (Neutral line), PE (equipotential line)
1 grounding bar
1 equipotential connecting cable
Feeder input interface
Technical Manual - System Description M900/M1800 BTS3X Series Base Transceiver Station
Appendix A Technical Specifications
Appendix A Technical Specifications A.1 ITU and ETSI Standards Huawei-developed BTS is in compliance with GSM recommended Phase 2+ of ETSI, as shown below:
GSM 01.02(ETR009):”General description of a GSM Public Land Mobile Network (PLMN)”
GSM 04.04 (ETS 300 553):”European digital cellular telecommunications system (Phase 2); layer 1 General requirements”
GSM 04.05 (ETS 300 554):”European digital cellular telecommunications system (Phase 2); Data Link (DL) layer General aspects”
GSM 04.06 (ETS 300 555):”European digital cellular telecommunications system (Phase 2); Mobile Station - Base Station System (MS - BSS) interface Data Link (DL) layer specification”
GSM04.08 (ETS300557):”Digital cellular telecommunications system (Phase2); Mobile radio interface layer 3 specification”
GSM05.01 (ETS300573):”Digital cellular telecommunications system (Phase2); Physical layer on the radio path General description”
GSM 05.02(ETS 300 574):”Multiplexing and multiple access on the radio path”
GSM05.03 (ETS300575):”Digital cellular telecommunications system (Phase2); Channel coding”
GSM05.04 (ETS300576):”Digital cellular telecommunications system (Phase2); Modulation”
GSM05.05 (ETS300577):”Digital cellular telecommunications system (Phase2); Radio transmission and reception”
GSM05.08 (ETS300578):”Digital cellular telecommunications system (Phase2); Radio subsystem link control”
GSM05.10 (ETS300579):”Digital cellular telecommunications system (Phase2); Radio subsystem synchronization”
GSM11.10 (ETS300607):”Digital cellular telecommunications system (Phase2); Mobile Station (MS) conformity specification”
GSM11.11 (ETS300608):”Digital cellular telecommunications system (Phase2); Specification of the Subscriber Identity Module - Mobile Equipment (SIM - ME) interface”
GSM 08.58(ETS 300 596):”Base station controller-Base Transceiver Station (BSC-BTS) interface layer 3 specification”
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Appendix A Technical Specifications
GSM 08.51 (ETS 300 592):”European digital cellular telecommunications system (Phase 2); Base Station Controller - Base Transceiver Station (BSC - BTS) interface General aspects”
GSM 08.52 (ETS 300 593):”European digital cellular telecommunications system (Phase 2); Base Station Controller - Base Transceiver Station (BSC - BTS) interface Interface principles”
GSM 08.56 (ETS 300 595):”European digital cellular telecommunications system (Phase 2); Base Station Controller - Base Transceiver Station (BSC - BTS) interface Layer 2 specification”.
A.2 Abis Interface and Um Interface Specifications
GSM 08.51 (ETS 300 592):”European digital cellular telecommunications system (Phase 2); Base Station Controller - Base Transceiver Station (BSC - BTS) interface General aspects”
GSM 08.52 (ETS 300 593):”European digital cellular telecommunications system (Phase 2); Base Station Controller - Base Transceiver Station (BSC - BTS) interface Interface principles”
GSM 08.56 (ETS 300 595):”European digital cellular telecommunications system (Phase 2); Base Station Controller - Base Transceiver Station (BSC - BTS) interface Layer 2 specification”
GSM 04.22 (ETS 300 563):“European digital cellular telecommunication system (Phase 2); Radio Link Protocol (RLP) for data and telematic services on the Mobile Station - Base Station System (MS - BSS) interface and the Base Station System - Mobile-services Switching Centre (BSS - MSC) interface”
A.3 Environment Adaptability Specifications BTS30/312 Specifications are as follows:
Low temperature working index: IEC 68 2-1.
High temperature working index: IEC 68 2-2.
Temperature cycle operation test: IEC 68 2-14.
Moist heat working index: IEC 68-2-30.
Working jiggling index: ETS 300-019-3.
Shockproof index: Adopt earthquake testing method stipulated by t he Ministry of Posts and Telecommunications. Shockproof grade is grade 8~9 earthquake intensity.
Besides the above specifications, BTS3012A also complies with the following specifications:
Shell protection level: IP55.
Ultraviolet radiation specification: IEC 68-2-5.
Moldproof index: IDT IEC 68-2-10.
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Appendix A Technical Specifications
Salt spray proof index: IDT IEC 68-2-11.
A.4 EMC Specifications
ETSI EN 301 489-1 V1.3.1 (2001-07): "Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 1: Common technical requirements"
ETSI EN 301 489-8 V1.1.1 (2000-09): "Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 9: Specific conditions for GSM Base Station"
ETS 300 342-3: (1999-10): ”Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) for European digital cellular telecommunications system (GSM 900 MHz and DCS 1 800 MHz); Part 3: Base station radio and ancillary equipment and repeaters meeting Phase 2 GSM requirements”
A.5 Lightning Protection Specifications
ETS 300-253.
IEC-1312.
ITU-T
K.27(1996)
Bonding
Configurations
and
Earthing
Inside
a
Telecommunication Building.
ITU-T K.11 Principles of Protection Against Overvoltage and Overcurrents.
ITU-T K.46 Protection of telecommunication lines using metallic symmetric conductors against lightning induced surges.
ITU-T K.20 Resistibility of Telecommunications equipment installed in a telecommunications centre to overvoltages and overcurrents.
A.6 Safety Standard
EN60950.
IEC60950.
A-3
Technical Manual - System Description M900/M1800 BTS3X Series Base Transceiver Station
Appendix B Abbreviations
Appendix B Abbreviations A
ABB
Abis Bypass Board
AGCH
Access Grant Channel
APC
Automatic Power Control
APL
Advanced Phase Lock
ASU
Access network SDH transmission Unit
B
BCCH
Broadcast Control CHannel
BER
Bit Error Ratio
BSC
Base Station Controller
BSIC
Base transceiver Station Identity Code
BSS
Base Station System
BTS
Base Transceiver Station
BTSM
BTS Management
C
CBCH
Cell Broadcast CHannel
CCCH
Common Control CHannel
CCH
Control Channel
CDU
Combining and Distribution Unit
D
DCCH
Dedicated Control CHannel
DL
Data Link (layer)
DRX
Disconnectinuous Reception
DT
Discontinuous transmission (mechanism)
E
EDGE
Enhanced Data Rates For GSM Evolution
EDU
Enhanced duplexer unit
EFR
Enhanced Full Rate
F
FACCH
Fast ACCH
B-1
Technical Manual - System Description M900/M1800 BTS3X Series Base Transceiver Station
FACCH/F
Fast Associated Control Channel/Full rate
FCCH
Frequency Correction CHannel
FDMA
Frequency Division Multiple Addressing
FH
Frequency Hopping
FN
Frame Number
G
GMSC
Mobile service Switching Centre
GPRS
General Packet Radio Service
GSM
Global System for Mobile communications
H
HDLC
High level Data Link Control
HDSL
High speed digital Subscriber Line
HLR
Home Location Register
I
ID
Identification/Identity
IEC
International Electrotechnical Commission
IMEI
International Mobile Subscriber Identity
IMSI
International Mobile Subscriber Identity
ISDN
Integrated Services Digital Network
L
L1
Layer 1
L2
Layer 2
L2ML
Layer 2 Management Link
L3
Layer 3
LAPB
Location Area
LAPD
Link Access Protocol on the D channel
LAPD
Link Access Protocol on the Dm channel
Lm
Half rate traffic channel
LNA
Low Noise Amplifier
M
MCK
Main Clock board
MM
Mobility Management
MMI
Man Machine Interface
MS:
Mobile Station
B-2
Appendix B Abbreviations
Technical Manual - System Description M900/M1800 BTS3X Series Base Transceiver Station
MSC
Mobile services Switching Centre, Mobile Switching Centre
MSISDN
Mobile Station International ISDN Number
MTBF
Mean Time Between Failures
O
O&M, OM
Operations & Maintenance Centre
OMC
Operations & Maintenance Centre
OML
Operations & Maintenance Centre
OSI
Open System Interconnection
P
PAT
Passive Transmission Board
PBU
Power Boost Unit
PCH
Paging Channel
PH
Physical (layer)
PLMN:
Public Land Mobile Network
PMU
Power Monitor Unit
PON
Passive Optical Network
PP
Point-to-Point Protocol
PSTN
Public Switched Telephone Network
PSU
Power Supply Unit
R
RACH
Random Access CHannel
RF
Radio Frequency
RR
Radio Resource management
RSL
Radio Signaling Link
RXLEV
Received signal level
RXQUAL
Received Signal Quality
S
SACCH
Slow Associated Control CHannel
SACCH/C4
Slow Associated Control CHannel/SDCCH/4
SACCH/C8
Slow Associated Control CHannel/SDCCH/8
SACCH/T
Slow Associated Control CHannel/Traffic channel
SACCH/TF
Slow Associated Control CHannel/Traffic channel Full rate
SCH
Synchronization CHannel
SCU:
Simple combining Unit
B-3
Appendix B Abbreviations