Huawei CBTS3612-1900 User Manual

HUAWEI

Airbridge cBTS3612 CDMA Base Station User Manual

System Description

HUAWEI

Airbridge cBTS3612 CDMA Base Station User Manual

Local Maintenance Terminal

HUAWEI

Airbridge cBTS3612 CDMA Base Station User Manual

BTS Maintenance

1.5cm

Airbridge cBTS3612 CDMA Base Station

7cm Font: Arial 22pt , Product name: Bold

User Manual

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HUAWEI

Ver: T2-030160-

20030125-C-1.21

BOM: 31013260

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Huawei Technologies Co., Ltd.

Administration Building, Huawei Technologies Co., Ltd., Bantian, Longgang District, Shenzhen, P. R. China Postal Code: 518129 Website: http://www.huawei.com

BOM: 31013260

Airbridge cBTS3612 CDMA Base Station User Manual

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Huawei Technologies Co., Ltd.

10cm

1. 16K Cover for hectograph; Font: Arial 22 pt; Product name: Bold

Airbridge cBTS3612

CDMA Base Station

User Manual

HUAWEI

1. System Description

2. Local Maintenance Terminal

3. BTS Maintenance

Airbridge cBTS3612 CDMA Base Station User Manual

V100R002

Airbridge cBTS3612 CDMA Base Station User Manual

Manual Version Product Version BOM

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.

Address: Administration Building, Huawei Technologies Co., Ltd., Bantian, Longgang District, Shenzhen, P. R. China Postal Code: 518129 Website: http://www.huawei.com

T2-030160-20030125-C-1.21 V100R002 31013260

Email: support@huawei.com

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

, HUAWEI, C&C08, EAST8000, HONET, , ViewPoint, INtess, ETS, DMC,

TELLIN, InfoLink, Netkey, Quidway, SYNLOCK, Radium, TELESIGHT, Quidview, Musa, Airbridge, Tellwin, Inmedia, VRP, DOPRA, iTELLIN,

iNET, NETENGINE, OptiX, SoftX, iSite, U-SYS, iMUSE,

HUAWEI OptiX, C&C08 OpenEye, Lansway, SmartAX are trademarks of Huawei Technologies Co., Ltd.

M900/M1800,

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 don't constitute the warranty of any kind, express or implied.

About This Manual

Version

The product version corresponds to the manual is Airbridge cBTS3612 CDMA Base Station V100R002.

Contents

This User Manual gives a systematic introduction on the technical principle s, structures and maintenance methods of Airbridge cBTS3612 CDMA Base Station (cBTS3612 hereafter).

It is divided into three modules:

Module 1 System Description

This module introduces the technical principles, software and hardware structures, functions, networking configurations and performance indices of cBTS3612.

This module introduces how to use the cBTS3612 local maintenance terminal. First is the guide to the local maintenance terminal, second is the detailed introduction of the local commands, including configuration commands a nd maintenance commands.

This module introduces how to maintain the cBTS3612 BTS, including routine maintenance instructions, fault analysis and location, component replacement and component description.

Target Readers

The manual is intended for the following readers:

z Installation engineers & technicians z Operation & maintenance personnel

Module 2 Local Maintenance Terminal

Module 3 BTS Maintenance

Conventions

This document 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.

Terminal Display

II. Command conventions

Convention Description

boldface font Command keywords (which must be input unchanged) are in boldface.

italic font Command arguments for which you supply values are in italics. [ ] Elements in square brackets [ ] are optional.

{ x | y | ... }

[ x | y | ... ]

{ x | y | ... } *

[ x | y | ... ] *

Terminal Display is in

via the terminal is in boldface.

Alternative keywords are grouped in braces and separated by vertical bars. One is selected.

Optional alternative keywords are grouped in square brackets and separated by vertical bars. One (or none) is selected.

Alternative keywords are grouped in braces and separated by vertical bars. A minimum of one and maximum of all can be selected.

Optional alternative keywords are grouped in square brackets and separated by vertical bars. Many (or none) are selected.

A line starting with an exclamation mark is comments.

Courier New; message input by the u se r

III. GUI conventions

Convention Description

< > Message entered via the terminal is within angle brackets. [ ] MMIs, menu items, data table and field names are inside square brackets [ ].

Multi-level menus are separated by forward slashes (/). Menu items are in boldface. For example, [File/Create/Folder].

IV. Keyboard operation

Format Description

<Key> Press the key with key name expressed with a pointed bracket, e.g.

<Key1+Key2> Press the keys concurrently; e.g. <Ctrl+Alt+A>means the three keys should

<Key1, Key2> Press the keys in turn, e.g. <Alt, A>means the two keys should be pressed

[Menu Option] The item with a square bracket indicates the menu option, e.g. [System]

[Menu1/Menu2/Menu3] Multi-level menu options, e.g. [System/Option/Color setup] on the main

V. Mouse operation

Action Description

Click Press the left button or right button quickly (left button by default).

<Enter>, <Tab>, <Backspace>, or<A>.

be pressed concurrently.

in turn.

option on the main menu. The item with a pointed bracket indicates the functional button option, e.g. <OK> button on some interface.

menu indicates [Color Setup] on the menu option of [Option], which is on the menu option of [System].

Double Click Press the left button twice continuously and quickly. Drag Press and hold the left button and drag it to a certain position.

VI. Symbols

Eye-catching symbols are also used in this document 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.

User Manual Airbridge cBTS3612 CDMA Base Station

System Description

Table of Contents

1 System Overview .............................................................................................................. 1-1

1.1 Brief Introduction....................................................................................................... 1-1

1.2 System Features ....................................................................................................... 1-3

1.2.1 Advanced Technology and Excellent Performance............................................ 1-3

1.2.2 Protecting User Investment.............................................................................. 1-4

1.2.3 Convenient Operation and Maintenance ...........................................................1-4

1.2.4 Flexible Networking Mode................................................................................ 1-5

1.2.5 Reliable Power Supply System ........................................................................ 1-5

1.2.6 Multi-band supported....................................................................................... 1-6

1.3 Technical Index......................................................................................................... 1-6

1.4 External Interface ...................................................................................................... 1-9

1.4.1 Overview .........................................................................................................1-9

1.4.2 Um Interface .................................................................................................1-10

1.4.3 Abis Interface ................................................................................................1-14

1.4.4 OML Interface ...............................................................................................1-18

1.4.5 LMF Interface ................................................................................................ 1-18

1.4.6 System Synchronization Interface ..................................................................1-18

1.4.7 BTS Test Interface ........................................................................................1-18

1.4.8 Remote Maintenance Serial Port....................................................................1-19

1.4.9 Environment Alarm Interface..........................................................................1-19

1.5 Reliability Design ....................................................................................................1-19

1.5.1 Hardware Reliability Design ...........................................................................1-20

1.5.2 Software Reliability Measures ........................................................................1-23

2 Hardware Architecture ...................................................................................................... 2-1

2.1 Overview .................................................................................................................. 2-1

2.2 Baseband Subsystem ................................................................................................2-5

2.2.1 Overview .........................................................................................................2-5

2.2.2 Control & Clock Module (BCKM)...................................................................... 2-7

2.2.3 Control Interface Module (BCIM) ....................................................................2-10

2.2.4 Channel Processing Module (BCPM) .............................................................2-12

2.2.5 Resource Distribution Module (BRDM) ...........................................................2-14

2.2.6 Baseband Backplane Module (CBKM)............................................................2-17

2.2.7 E1 Surge Protector (BESP)............................................................................2-19

2.2.8 Fan Module (BFAN) .......................................................................................2-20

2.3 RF Subsystem ........................................................................................................2-24

2.3.1 Overview .......................................................................................................2-24

2.3.2 BTS Transceiver Module (BTRM)...................................................................2-25

User Manual Airbridge cBTS3612 CDMA Base Station

System Description

Table of Contents

2.3.3 BTS High Power Amplifier Module (BHPA).....................................................2-28

2.3.4 BTS Transceiver Backplane Module (BTBM) ..................................................2-30

2.3.5 Combining Duplexer Unit (CDU) .....................................................................2-31

2.3.6 Duplexer Filter Unit (DFU) .............................................................................2-33

2.3.7 Dual Duplexer Unit (DDU)..............................................................................2-35

2.3.8 Receive LNA Distribution Unit (RLDU)............................................................2-37

2.3.9 BTS RF Fan Module (BRFM) .........................................................................2-39

2.4 Antenna & Feeder Subsystem .................................................................................2-43

2.4.1 Overview .......................................................................................................2-43

2.4.2 RF Antenna & Feeder....................................................................................2-43

2.4.3 Dual-Satellite Synchronization Antenna & Feeder ...........................................2-47

2.5 Power Supply Subsystem........................................................................................2-50

2.5.1 Overview .......................................................................................................2-50

2.5.2 General Structure ..........................................................................................2-51

2.5.3 Technical Indices ..........................................................................................2-51

2.5.4 Power Supply Monitoring ...............................................................................2-54

2.5.5 BTS Direct Current Switchbox (BDCS)...........................................................2-55

2.6 Environment Monitoring...........................................................................................2-55

2.6.1 Alarm Box Input.............................................................................................2-56

2.6.2 Alarm Indicator..............................................................................................2-56

2.6.3 Interface for Actuators ...................................................................................2-57

2.6.4 Communication .............................................................................................2-57

2.7 Lightning Protection System ....................................................................................2-57

2.7.1 Overview .......................................................................................................2-57

2.7.2 Lightning Protection for DC ............................................................................2-59

2.7.3 Lightning Protection for Trunk Line.................................................................2-60

2.7.4 Lightning Protection for Antenna & Feeder Port ..............................................2-62

3 Software Architecture ....................................................................................................... 3-1

3.1 Overall Architecture................................................................................................... 3-1

3.2 Module Descript ion ...................................................................................................3-2

3.2.1 Main Control Software..................................................................................... 3-2

3.2.2 O&M Software................................................................................................. 3-4

3.2.3 Clock Software ................................................................................................ 3-6

3.2.4 BCIM Software ................................................................................................3-7

3.2.5 BCPM Software ...............................................................................................3-8

3.2.6 BRDM Software .............................................................................................. 3-9

3.2.7 BTRM Software.............................................................................................3-10

4 System Function ............................................................................................................... 4-1

4.1 Transmission Networking .......................................................................................... 4-1

4.2 Call Procedure .......................................................................................................... 4-3

4.2.1 Speech Service Call Procedure ........................................................................4-3

4.2.2 Data Service Call Procedure ............................................................................ 4-6

User Manual Airbridge cBTS3612 CDMA Base Station

System Description

Table of Contents

4.3 Signaling Processing................................................................................................. 4-9

4.4 Baseband Processing ..............................................................................................4-11

4.5 RF Functions ..........................................................................................................4-13

4.5.1 Power Control ...............................................................................................4-13

4.5.2 Handoff .........................................................................................................4-15

4.5.3 Flexible Configuration....................................................................................4-15

4.5.4 Radio Co nfiguration and Channel Support ...................................................... 4-16

4.5.5 Easy Installation and Operation ......................................................................4-21

4.5.6 Diversity Receiving........................................................................................4-21

4.5.7 Cell Breath ....................................................................................................4-22

4.6 Operation and Maintenance.....................................................................................4-22

4.6.1 Software Loading ..........................................................................................4-22

4.6.2 Interface Management...................................................................................4-23

4.6.3 Test Management .........................................................................................4-24

4.6.4 Status Management ......................................................................................4-24

4.6.5 Event Reporting and Processing ....................................................................4-25

4.6.6 Equipment Management ................................................................................4-26

4.6.7 Site Configuration..........................................................................................4-28

4.6.8 Operation Status Tracing ...............................................................................4-29

4.6.9 Other Functions .............................................................................................4-29

5 System Configuration ....................................................................................................... 5-1

5.1 Overview .................................................................................................................. 5-1

5.1.1 Basic/Extended Cabinet Configuration ............................................................. 5-1

5.1.2 Baseband Subrack Configuration .....................................................................5-4

5.1.3 Power Supply Subrack Configuration ............................................................... 5-6

5.1.4 RF Modules Configuration ............................................................................... 5-6

5.1.5 Configuration of Antenna Parts ........................................................................ 5-7

5.2 Typical Configurations ............................................................................................... 5-8

5.2.1 Typical Configuration of cBTS3612 for 450MHz Band ....................................... 5-8

5.2.2 Typical Configuration of cBTS3612 for 800MHz Band .....................................5-14

5.2.3 Typical Configuration of cBTS3612 in 1900MHz Band .....................................5-21

Appendix A Technical Performance of Receiver and Transmitter ..................................... A-1

A.1 Performance of Receiver...........................................................................................A-1

A.1.1 Frequency Coverage.......................................................................................A-1

A.1.2 Access Probe Acquisition ................................................................................A-1

A.1.3 R-TCH Demodulation Performance..................................................................A-1

A.1.4 Receiving Performance...................................................................................A-9

A.1.5 Limitations on Emissions ...............................................................................A-10

A.1.6 Received Signal Quality Indicator (RSQI) .......................................................A-11

A.2 Performance of Transmitter .....................................................................................A-11

A.2.1 Frequency Requirements ..............................................................................A-11

A.2.2 Modulation Requirements ..............................................................................A-12

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User Manual Airbridge cBTS3612 CDMA Base Station

System Description

Table of Contents

A.2.3 RF Output Power Requirement ......................................................................A-12

A.2.4 Limitations on Emissions ...............................................................................A-13

Appendix B EMC Performance ........................................................................................... B-1

B.1 EMI Performance ......................................................................................................B-1

B.2 EMS Performance....................................................................................................B-2

Appendix C Environment Performance .............................................................................. C-1

C.1 Ambient Temperature and Humidity.......................................................................... C-1

C.2 Cleanness ............................................................................................................... C-1

C.3 Illumination .............................................................................................................. C-2

C.4 Atmospheric Condition............................................................................................. C-2

Appendix D Electromagnetic Radiation ..............................................................................D-1

D.1 Introduction ............................................................................................................. D-1

D.2 Maximum Permissible Exposure (MPE).................................................................... D-1

D.3 Estimation of Exposure to Electromagnetic Fields ..................................................... D-3

D.4 Calculation of Safe Distance .................................................................................... D-3

D.5 Location of Base Station Antennas ........................................................................... D-4

D.5.1 Exclusion Zones ............................................................................................ D-4

D.5.2 Guidelines on Arranging Antenna Locations.................................................... D-4

Appendix E Standard Compliance.......................................................................................E-1

E.1 Um Interface.............................................................................................................E-1

E.2 Abis Interface ...........................................................................................................E-1

E.3 Lightning Protection..................................................................................................E-2

E.4 Safety ......................................................................................................................E-3

E.5 EMC.........................................................................................................................E-3

Appendix F Abbreviation ..................................................................................................... F-1

User Manual

Mobile Network

Airbridge cBTS3612 CDMA Base Station

1 System Overview

This chapter firstly presents an outline of the cBTS3612 base station system, and then briefs the system features, technical indices and external interfaces, followed by an introduction to the system reliability design in aspects of hardware and

software.

1.1 Brief Introduction

The cdma2000 1X mobile communication system comprises the Base Station Subsystem (BSS) and the Core Network (CN). The BSS comprises the Base Transceiver Station (BTS), Base Station Controller (BSC) and Packet Control Function (PCF), while the CN comprises the packet domain network and circuit domain network. The equipment of packet domain interworks with Internet, and that of the circuit domain interworks with the conventional PLMN and PSTN/ISDN. The system's operation and maintenance is implemented via the integrated mobile

network management system (iManager M2000).

System Description

1 System Overview

The position of BTS in CDMA system is as shown in Figure 1-1.

Management System

SoftSite

MS: Mobile Station BTS: Base Transceiver Station BSC: Base Station Controller ISDN: Integrated Service Data Network PLMN: Public Land Mobile Network PSTN: Public Switched Telephone Network PCF: Packet Control Function Softsite: Soft Site BSS: Base Station Subsystem CN: Core Network

BTS

SoftSite

BTS

SDH

BTS

Abis

BSC/PCF

A3/A7

BSC/PCF

A10/A11

A1/A2

Packet Domain

Network Equipment

A10/A11

A1/A2

Circuit Domain

Network

Equipment

Internet

PLMN

PSTN/ISDN

Figure 1-1 Network structure of cdma2000 1X mobile communication system

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User Manual Airbridge cBTS3612 CDMA Base Station

cBTS3612 is located between the Base Station Controller (BSC) and the Mobile Station (MS) in the cdma2000 1X mobile communication system.

Under the control of the BSC, the cBTS3612 serves as the wireless transceiving equipment of one cell or multiple logical sectors. Connecting to BSC via the Abis interface, it assists the BSC on the radio resource management, radio parameter management and interface management. It also implements, via the Um interface, the radio transmission between the BTS and the MS, as well as related control

functions. 　 cBTS3612 cabinet is shown in Figure 1-2.

System Description

1 System Overview

Baseband subrack

Fan subrack

Power subrack

CDU/RLDU subrack

RF subrack

Figure 1-2 cBTS3612 cabinet

cBTS3612 has the following functions:

I. Interface function

RF subrack

l Um interface supports IS2000 Release A. It is fully compatible with IS-95A/B. l The physical layer supports a rate as high as 307.2kbit/s. l Hard handoff, soft handoff and softer handoff are supported. l Quick forward power control, slow forward power control, quick reverse power

control and reverse open-loop power control are available.

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User Manual Airbridge cBTS3612 CDMA Base Station

l Support omni -cell, directional 3 sectors and 6 sectors configurations. l Abis interface supports E1/T1 trunk mode and optical fiber transmission mode

(optical fiber transmission mode will be available in the coming version). E1/T1 trunk mode supports as many as 16 E1/T1 trunk lines and optical fiber transmission mode will support 2 pairs of STM-1 optical fibers .

l Chain, star and tree networking modes are supported. l Softsite (ODU3601C) can be extended afar via optical fibers.

II. Basic functions of operation and maintenance

l Software downloading l Abis interface management l Air interface (Um) management l Test management l Status management l Event report handling l Equipment management l Data configuration management l BTS operation tracing l Telnet logon

System Description

1 System Overview

1.2 System Features

cBTS3612 features large capacity, high integration and low power consumption. One cabinet can accommodate as many as 12 sector carriers. It can satisfy the customer's demands on capacity, configuration, installation, power supply, transmission and service. It's a typical "All In One" BTS. Its features are highlighted

as follows:

1.2.1 Advanced Technology and Excellent Performance

cBTS3612 integrates the following technologies to improve its performances:

l Based on well-developed Huawei ATM platform and cell switching & broadband

processing technology, standard interface and open application is enabled.

l Designed with the resource pool concept, which helps increase the availability

of hardware resources and the system's fault -tolerance. 　

l Equipped with the digital intermediate frequency technology to enhance

wireless signal transmitting and receiving capability. 　

l Designed with the technology of diversity receiving to improve the radio signal

receiving performance. 　

l Supporting remote installation of the SoftSite via optical fibers, thus making

networking more flexible. 　

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User Manual Airbridge cBTS3612 CDMA Base Station

l Equipped with the blind mate technology on the radio frequency module for

convenient maintenance. 　

l Intelligent fans with prolonged service life and reduced noise. 　

1.2.2 Protecting User Investment

The cBTS3612 is compatible with IS-95A/B and cdma2000 1X, and can be upgraded to cdma2000 1X EV smoothly. When the network is upgraded from IS-95 to cdma2000 1X, or from cdma2000 1X to cdma2000 1X EV, the user's investment

can be saved. The cBTS3612 features large-capacity design, modular structure and high

integration. A single cabinet can accommodate up to 12 sector carriers. It also supports 36 sector carriers with three fully configured cabinets combined together.

Its baseband processing employs the resources pool design to reduce equipment redundancy and improve reliability.

System Description

1 System Overview

Its Abis interface supports 16 E1s or 2 STM-1 optical interfaces (in the coming version), oriented to future high-speed data service.

Its excellent inheritance capability guarantees the original antenna and feeder components can be used in the event of BTS expansion or upgrade. The components include DU, RLDU, antenna, feeder and the optional TMA (The TMA only applies to 19000MHz band). The DU includes CDU, DFU and DDU, the

difference between these 3 DUs will be introduced in " 2.3 RF Subsystem".

1.2.3 Convenient Operation and Maintenance

Emergency serial ports are provided for the boards, so that the alarm information can be reported in the case of communication link fault.

Real-time status query, online board test and system fault locating as well as system restart functions are provided.

Telnet Server is provided so that the user can log in to the BTS via the local Ethernet interface in the standard Telnet mode to perform O&M.

Modem dial-up is supported so that the remote O&M can be performed. All boards of baseband subrack support hot plug/unplug for the sake of ready

maintenance, upgrade and expansion. Blind mate of the radio frequency module guarantees that all operations can be

done at the front side of the equipment. During expansion and configuration, wiring at the back need not be modified.

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User Manual Airbridge cBTS3612 CDMA Base Station

Its modularized structure reduces the internal connections and improves the reliability of the system, and thus makes the installation and maintenance easier.

In the case of whole BTS interruption due to power supply or transmission causes, the cBTS3612 system can restart automatically right after the faults are cleared.

1.2.4 Flexible Networking Mode

I. Networking for large capacity and wide coverage

l A single cabinet supports as many as 12 sector carriers. 3 cabinets can be

combined to provide a maximum capacity of 36 sector carriers .

l Large-capacity trunk. Abis interface of BTS supports as many as 16 E1s

transmission. The coming version will support STM-1 optical transmission in ATM mode at Abis interface and provide two STM -1 ports for Abis interface trunk.

l Support multiple BTS configurations such as omni 4 carriers , 1%3, 2%3, 12%3,

6%6(carrier%sector) configurations.

System Description

1 System Overview

II. Supporting multiple BTS networking modes such as chain, star and tree

Refer to "4.1 Transmission Networking" for details.

III. Soft BTS networking (the SoftSite will be available in the coming version)

In this networking mode, the baseband unit adopts the centralized processin g mode. The baseband signals and maintenance information are transferred through the fiber to the SoftSite (ODU3601C). The SoftSite can be applied indoors, outdoors or underground. 　

The SoftSite, small in size, is equipped with built-in power supply, temperature regulator and monitoring device. It can be used in severe environments, e.g. outdoors. The feeder loss of the SoftSite is trivial, making large coverage for macro cells possible.

SoftSites in the chain-networking mode are applicable to highways and subways. A maximum of 6 SoftSites can be connected in serial in one pair of optical fibers. 　

1.2.5 Reliable Power Supply System

The DC/DC power supply with -48V DC power input, and +27V DC output is adopted. The whole power supply system is composed of 5 modules in full configuration, with automatic current equalization function, 4+1 redundancy, meeting the requirement of 8000W power supply.

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User Manual Airbridge cBTS3612 CDMA Base Station

Current equalization hot backup, centralized management, and decentralized power supply are enabled. It makes the power supply system safer and more reliable. It provides automatic alarming through monitoring interface for the power fan, input under-voltage, output over-voltage, overheat and protection against reverse connection. This ensures the reliability of the power system. Remote power on/off function enables unattended BTS operation and remote maintenance.

1.2.6 Multi-band supported

Now the cBTS3612 base station support the following band class specified in TIA/EIA-97-D Recommended Minimum Performance Standards for cdma2000

Spread Spectrum Base Stations. Band Class 0 (800 MHz Band ). Band Class 1 (1900 MHz Band). Band Class 5 (450 MHz Band ).

System Description

1 System Overview

To support the different band classes, RF modules with different specifications should be configured in cBTS3612 base station.

1.3 Technical Index

I. Structure and environment indices

Cabinet dimensions (Top set excluded)

Power supply

Operational environment

Equipment room noise

Note:

In terms of environment adaptability, cBTS3612 conforms to the following specifications: IEC 60721-3 series, IEC 60068-2 and ETS 300 019-2 series. For details, please refer to Appendix C Environment Performance. Equipment room noise is In compliance with ETS 300 753 Noise Requirement for telecommunication equipment and base station environment. When the inside temperature of cBTS3612 equipment room is 50âC, the equipment noise is less than 70dBA, and when the temperature is 25âC, the equipment noise is less than 60dBA.

1800mm x 800mm x 650mm (H x W x D)

-48V DC (-40 - -60V DC) Temperature: -5°C ~ 50°C

Relative humidity: 5% ~ 90%  70dB A (With intelligent fan control. The noise varies with the

ambient temperature)

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User Manual Airbridge cBTS3612 CDMA Base Station

II. Clock indices

System Description

1 System Overview

Frequency stability

Annual aging rate

<±5 x 10-8 <±5 x 10-10

III. System capacity

Full configuration of one cabinet

Full configuration of three cabinets

12 sector-carriers 36 sector-carriers

IV. Power consumption and cabinet weight

Site configuration Power consumption (W) Cabinet weight (kg)

S(1/1/1) <1500 351 S(2/2/2) <2800 388 S(4/4/4) <5500 550

V. Transmitter indices

l 450MHz Band

Working band

Channel bandwidth

Channel precision

Frequency tolerance

Transmitting power

l 800MHz Band

Working band

Channel bandwidth

Channel precision

Frequency tolerance

Transmitting power

l 1900MHz Band

460 - 470MHz

1.23MHz 25kHz ±0.05ppm

20W (The maximum value measured at the cabinet-top feeder port)

869 - 894MHz

1.23MHz 30kHz ±0.05ppm

20W (The maximum value measured at the cabinet-top feeder port)

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User Manual Airbridge cBTS3612 CDMA Base Station

Working band

System Description

1 System Overview

1930 - 1990MHz

Channel bandwidth

Channel precision

Frequency tolerance

Transmitting power

VI. Receiver indices

l 450MHz Band

Working band

Channel bandwidth

Channel precision

Sensitivity of signal receiver

l 800MHz Band

Working band

Channel bandwidth

Channel precision

Sensitivity of signal receiver

1.23MHz 50kHz ±0.05ppm

20W (The maximum value measured at the cabinet-top feeder port)

450 - 460MHz

1.23MHz 25kHz Better than -126dB (RC3, main and diversity receiving)

824 - 849MHz

1.23MHz 30kHz Better than –127dBm (RC3, main and diversity receiving)

l 1900MHz Band

Working band

Channel bandwidth

Channel precision

Sensitivity of signal receiver

1850 - 1910MHz

1.23MHz 50kHz Better than –126dBm (RC3, main and diversity receiving)

VII. Rate configuration on Um interface

Rate configuration Forward Reverse

Mode 1 RC1 RC1 Mode 2 RC2 RC2 Mode 3 RC3 or RC4 RC3 Mode 4 RC5 RC4

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User Manual Airbridge cBTS3612 CDMA Base Station

VIII. EMC indices

ETSI EN 300 386 Electromagnetic compatibility and Radio spectrum Matters (ERM)

- Telecommunication network equipment - ElectroMagnetic Compatibility (EMC) requirements is the universal EMC standard of telecommunication equipment. The EMC indices of the cBTS3612 comply with ETSI EN 300 386 V1.2.1 (2000 – 03).

IX. System reliability

System Description

1 System Overview

MTBF (hour) MTTR (hour)

Availability (A)

Note:

The performance of cBTS3612 base station satisfies or excels TIA/EIA-97-D: Recommended Minimum Performance Standards for cdma2000 Spread Spectrum Base Stations.

1.4 External Interface

1.4.1 Overview

The external interfaces of cBTS3612 are shown in Figure 1-3.

100000 1

99.999%

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User Manual Airbridge cBTS3612 CDMA Base Station

System Description

1 System Overview

Satellite

interface

Synchronization

interface

Figure 1-3 BTS external interface

equipment

Test

interface

Ethernet interface

Test

LMF

Environment

alarm box

Environment

alarm interface

BTS

Abis interface

Remote maintenance serial port

MODEM

OML

interface

PSTN

BSC

OMC

l Um interface: interface with MS. l Abis interface: interface with BSC. l OML interface: interface with the remote OMC. It shares the transmission

resources with Abis interface.

l LMF interface: interface with BTS local maintenance console. l System synchronization interface: including GPS/GLONASS antenna interface

and system external synchronization interface. When GPS/GLONASS is not available and there is other clock synchronization equipment, the clock synchronization output of the equipment can be connected with the external synchronization interface of BTS system.

l BTS test interface: interface for BTS test, providing such signals as 10MHz and

2s signal.

l Remote maintenance serial interface: another interface to remote console. This

is a standby maintenance interface can be used when the active maintenance link between OMC and BTS is interrupted.

l Environment alarm interface: interface with environment alarm collection box.

1.4.2 Um Interface

I. Overview

In Public Land Mobile Network (PLMN), MS is connected with the fixed part of the network through the radio channel, which enables the subscribers to be connected

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User Manual Airbridge cBTS3612 CDMA Base Station

with the network and to enjoy telecommunication services. To implement interconnection between MS and BSS, systematic rules and standards should be established for signal transmission on radio channels. The standard for regulating the radio channel signal transmission is called radio interface, or Um interface.

Um interface is the most important interface among the many interfaces of CDMA system. Firstly, standardized radio interface ensures that MSs of different manufacturers are fully compatible with different networks. This is one of the fundamental conditions for the roaming function of CDMA system. Secondly, radio interface defines the spectrum availability and capacity of CDMA system.

Um interface is defined with the following features :

l Channels structure and access capacity. l Communication protocol between MS and BSS. l Maintenance and operation features . l Performance features . l Service features.

System Description

1 System Overview

II. Um interface protocol model

Um interface protocol stack is in 3 layers, as shown in Figure 1-4.

Figure 1-4 Um interface layered structure

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User Manual Airbridge cBTS3612 CDMA Base Station

l Layer 1 is the physical layer, i.e. the bottom layer. It includes various physical

channels, providing a basic radio channel for the transmission of higher layer information.

l Layer 2 is the data link layer, including Medium Access Control (MAC) sublayer

and Link Access Control (LAC) sublayer. The cdma2000 MAC sublayer performs the mapping between logic channels and physical channels, and providing Radio Link Protocol (RLP) function. The cdma2000 LAC sublayer performs such functions as authentication, Automatic Repeat Request (ARQ), addressing and packet organization.

l Layer 3 is the top layer. It performs Radio Resource Management (RM),

Mobility Management (MM) and Connection Management (CM) through the air interface.

III. Physical layer

1) Operating band

System Description

1 System Overview

Band Forward Band Reverse Band Duplex

Channel

Carrier Space

450MHz 460 - 470MHz 450 - 460MHz 10MHz 1.23 MHz 1.23 MHz 800MHz 869 - 894 MHz 824 - 849 MHz 45MHz 1.23 MHz 1.25 MHz

1900MHz 1930 - 1990 MHz 1850 - 1910 MHz 80MHz 1.23 MHz 1.25 MHz

2) Physical layer function

l Service bearer: the physical channel in the physical layer provides bearer for

the logic channel of the higher layer.

l Bit error check: the physical layer provides a transmission service with error

protection, including error checking and error correction.

l User identification: the physical layer provides an exclusive ID for every user by

code division.

3) Radio configuration The cdma2000 physical layer supports multiple Radio Configurations (RCs).

Different RCs support different traffic channel data rates. For detailed introduction, please refer to Section 4.5.4 Radio Configuration and Channel Support.

IV. Data link layer

Data link layer at Um interface includes two sublayers: MAC and LAC. The purpose of introducing MAC and LAC is to:

l Support higher level services (signaling, voice, packet data and circuit data). l Support data services of multiple rates. l Support packet data service and circuit data service of higher quality (QoS).

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User Manual Airbridge cBTS3612 CDMA Base Station

l Support multi-media service, i.e. processing voices, packet data and circuit

data of different QoS levels at the same time.

1) MAC sublayer To support data service and multi -media service, cdma2000 1X provides powerful

MAC layer to ensure the reliability of services. MAC layer provides two important functions:

l Radio Link Protocol (RLP), ensuring reliable transmission on the radio link. l Multiplex function and QoS function, with diversified services and higher service

quality.

2) LAC sublayer LAC layer performs such functions as Automatic Repeat Request (ARQ),

authentication and addressing.

V. Layer 3

System Description

1 System Overview

The higher layer signaling performs the functions such as radio resource management, mobility management and call control management on air interface.

1) Radio resource management It is mainly used to establish, operate and release radio channels, and help to

realize soft handoff, softer handoff and hard handoff.

2) Mobility management It is mainly used to support the mobility features of the mobile user, performing such

functions as registration, authentication and Temporary Mobile Subscriber Identifier (TMSI) re -allocation.

3) Connection management It is mainly used to setup, maintain and terminate calls.

VI. Power control

Um interface utilizes power control technology to reduce the system interference and improve the system capacity. There are forward power control and reverse

power control available.

1) Forward power control supports closed -loop power control Forward power control includes power control based on power measurement report,

control based on EIB, and quick forward power control. Forward closed-loop power control means that MS checks the quality of received

frames and received power, makes judgment and sends request to BTS for

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