BSC Product Description(V900R008C11_02)

HUAWEI BSC6000 Base Station Controller

V900R008C11

BSC Product Description

Issue 02

Date 2008-10-20

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Contents

About This Document.....................................................................................................................1

1 Changes in BSC Product Description....................................................................................1-1

2 Position of the BSC in the GSM/GPRS Network................................................................2-1

3 Introduction to the BSC............................................................................................................3-13.1 BSC Physical Structure...................................................................................................................................3-23.2 BSC Logical Structure....................................................................................................................................3-53.3 BSC Software Structure..................................................................................................................................3-6

4 BSC Hardware Configuration..................................................................................................4-14.1 BSC Hardware Configuration.........................................................................................................................4-24.2 BSC Hardware Configuration Type A............................................................................................................4-5

4.2.1 BM/TC Separated (Configuration Type A)...........................................................................................4-54.2.2 BM/TC Combined (Configuration Type A).........................................................................................4-104.2.3 A over IP (Configuration Type A).......................................................................................................4-13

4.3 BSC Hardware Configuration Type B..........................................................................................................4-154.3.1 BM/TC Separated (Configuration Type B)..........................................................................................4-154.3.2 BM/TC Combined (Configuration Type B).........................................................................................4-194.3.3 A over IP (Configuration Type B).......................................................................................................4-22

5 BSC TDM Switching Subsystem............................................................................................5-15.1 Physical Structure of the BSC TDM Switching Subsystem...........................................................................5-25.2 Logical Structure of the BSC TDM Switching Subsystem.............................................................................5-3

6 BSC GE Switching Subsystem................................................................................................6-16.1 Physical Structure of the BSC GE Switching Subsystem...............................................................................6-26.2 Logical Structure of the BSC GE Switching Subsystem................................................................................6-36.3 Features of BSC GE Switching.......................................................................................................................6-4

7 BSC Service Processing Subsystem........................................................................................7-17.1 Physical Structure of the BSC Service Processing Subsystem.......................................................................7-27.2 Logical Structure of the BSC Service Processing Subsystem.........................................................................7-4

8 BSC Service Control Subsystem.............................................................................................8-18.1 Physical Structure of the BSC Service Control Subsystem............................................................................8-28.2 Logical Structure of the BSC Service Control Subsystem..............................................................................8-2

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9 BSC Interface Processing Subsystem.....................................................................................9-19.1 Physical Structure of the BSC Interface Processing Subsystem.....................................................................9-29.2 Logical Structure of the BSC Interface Processing Subsystem......................................................................9-3

10 BSC Clock Subsystem...........................................................................................................10-110.1 BSC Clock Sources.....................................................................................................................................10-210.2 BSC Clock Synchronization........................................................................................................................10-2

10.2.1 BSC Clock Synchronization (BM/TC Separated)..............................................................................10-310.2.2 BSC Clock Synchronization (BM/TC Combined).............................................................................10-510.2.3 BSC Clock Synchronization (A over IP)...........................................................................................10-6

11 BSC Power Subsystem..........................................................................................................11-1

12 BSC Environment Monitoring Subsystem........................................................................12-112.1 BSC Power Monitoring...............................................................................................................................12-212.2 BSC Fan Monitoring...................................................................................................................................12-212.3 BSC Environment Monitoring....................................................................................................................12-3

13 OM of the BSC........................................................................................................................13-113.1 OM Modes of the BSC................................................................................................................................13-213.2 OM Functions of the BSC...........................................................................................................................13-3

13.2.1 BSC Security Management................................................................................................................13-413.2.2 BSC Configuration Management.......................................................................................................13-613.2.3 BSC Performance Management.......................................................................................................13-1113.2.4 BSC Alarm Management.................................................................................................................13-1213.2.5 BSC Loading Management..............................................................................................................13-1313.2.6 BSC Upgrade Management..............................................................................................................13-1613.2.7 BTS Loading Management..............................................................................................................13-1713.2.8 BTS Upgrade Management..............................................................................................................13-17

14 BSC Signal Flow.....................................................................................................................14-114.1 BSC CS Signal Flow...................................................................................................................................14-214.2 BSC PS Signal Flow...................................................................................................................................14-614.3 BSC Signaling Flow....................................................................................................................................14-8

14.3.1 Signaling Flow on the Abis Interface.................................................................................................14-814.3.2 Signaling Flow on the A Interface...................................................................................................14-1114.3.3 Signaling flow on the Pb interface...................................................................................................14-1414.3.4 Signaling Flow on the Gb Interface.................................................................................................14-15

14.4 BSC OM Signal Flow...............................................................................................................................14-1614.4.1 BSC OM Signal Flow (BM/TC Separated)......................................................................................14-1614.4.2 BSC OM Signal Flow (BM/TC Combined).....................................................................................14-1914.4.3 BSC OM Signal Flow (A over IP)...................................................................................................14-19

15 BSC Transmission and Networking...................................................................................15-115.1 Transmission and Networking on the Abis Interface..................................................................................15-215.2 Transmission and Networking on the A Interface.......................................................................................15-6

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15.3 Transmission and Networking on the Pb Interface.....................................................................................15-915.4 Transmission and Networking on the Ater Interface................................................................................15-1015.5 Transmission and Networking on the Gb Interface...................................................................................15-11

16 BSC Technical Specifications..............................................................................................16-116.1 BSC Capacity Specifications......................................................................................................................16-216.2 BSC Engineering Specifications.................................................................................................................16-216.3 BSC Physical Interfaces..............................................................................................................................16-316.4 BSC Reliability Specifications....................................................................................................................16-816.5 BSC Clock Precision Requirements............................................................................................................16-916.6 BSC Noise and Safety Compliance.............................................................................................................16-916.7 BSC Environment Requirements................................................................................................................16-9

16.7.1 BSC Storage Requirements..............................................................................................................16-1016.7.2 BSC Transportation Requirements...................................................................................................16-1216.7.3 BSC Operating Environment Requirements....................................................................................16-15

16.8 Technical Specifications of BSC Parts......................................................................................................16-1716.8.1 Technical Specifications of the GBAM...........................................................................................16-1716.8.2 Technical Specifications of the GOMU...........................................................................................16-1916.8.3 Technical Specifications of the BSC Common Power Distribution Box.........................................16-2016.8.4 Technical Specifications of the BSC High-Power Distribution Box...............................................16-21

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Figures

Figure 2-1 Position of the BSC in the GSM/GPRS network...............................................................................2-2Figure 3-1 Physical structure of the BSC.............................................................................................................3-2Figure 3-2 Front view of the BSC cabinet...........................................................................................................3-4Figure 3-3 Logical structure of the BSC..............................................................................................................3-6Figure 3-4 Structure of the host software.............................................................................................................3-7Figure 3-5 Structure of the OMU software..........................................................................................................3-7Figure 3-6 Structure of LMT software.................................................................................................................3-8Figure 4-1 OM path between the GMPS and the main GTCS (in local GTCS mode)........................................4-3Figure 4-2 OM path between the GMPS and the main GTCS (in remote GTCS mode).....................................4-3Figure 4-3 BSC minimum configuration (GTCS configured on the BSC side)..................................................4-6Figure 4-4 BSC minimum configuration (GTCS configured on the MSC side)..................................................4-6Figure 4-5 BSC maximum configuration (GTCS configured on the BSC side)..................................................4-7Figure 4-6 BSC maximum configuration (GTCS configured on the MSC side).................................................4-7Figure 4-7 BSC maximum configuration (GTCS configured on the BSC side)..................................................4-8Figure 4-8 BSC maximum configuration (GTCS configured on the MSC side).................................................4-8Figure 4-9 BSC minimum configuration............................................................................................................4-10Figure 4-10 BSC maximum configuration (E1/T1 transmission used on the A interface)................................4-11Figure 4-11 BSC maximum configuration (STM-1 transmission used on the A interface)..............................4-12Figure 4-12 BSC minimum configuration..........................................................................................................4-13Figure 4-13 BSC maximum configuration.........................................................................................................4-14Figure 4-14 BSC minimum configuration (GTCS configured locally).............................................................4-15Figure 4-15 BSC minimum configuration (GTCS configured remotely)..........................................................4-16Figure 4-16 BSC maximum configuration (GTCS configured locally).............................................................4-16Figure 4-17 BSC maximum configuration (GTCS configured remotely)..........................................................4-17Figure 4-18 BSC maximum configuration (GTCS configured locally).............................................................4-17Figure 4-19 BSC maximum configuration (GTCS configured remotely)..........................................................4-18Figure 4-20 BSC minimum configuration..........................................................................................................4-20Figure 4-21 BSC maximum configuration (E1/T1 transmission used on the A interface)................................4-21Figure 4-22 BSC maximum configuration (STM-1 transmission used on the A interface)..............................4-21Figure 4-23 BSC minimum configuration..........................................................................................................4-23Figure 4-24 BSC maximum configuration.........................................................................................................4-23Figure 5-1 TDM interconnections between GMPS and GEPS............................................................................5-2Figure 5-2 TDM interconnections between GTCSs.............................................................................................5-2

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Figure 5-3 Intra-subrack TDM interconnections..................................................................................................5-3Figure 5-4 Logical structure of the BSC TDM switching subsystem..................................................................5-4Figure 6-1 GE interconnection between the GMPS and the GEPS......................................................................6-2Figure 6-2 GE interconnection between the GTCSs............................................................................................6-2Figure 6-3 Intra-subrack GE interconnection.......................................................................................................6-3Figure 6-4 Logical structure of the BSC GE switching subsystem......................................................................6-4Figure 7-1 Physical structure of the BSC service processing subsystem (1).......................................................7-2Figure 7-2 Physical structure of the BSC service processing subsystem (2).......................................................7-3Figure 7-3 Physical structure of the BSC service processing subsystem (3).......................................................7-3Figure 7-4 Physical structure of the BSC service processing subsystem (4).......................................................7-4Figure 7-5 Logical structure of the CS service processing subsystem.................................................................7-5Figure 7-6 Logical structure of the PS service processing subsystem................................................................. 7-5Figure 9-1 Physical structure of the BSC interface processing subsystem..........................................................9-2Figure 9-2 BSC interfaces....................................................................................................................................9-3Figure 10-1 Clock synchronization in the GMPS/GEPS (BITS clock source)..................................................10-3Figure 10-2 Clock synchronization in the GMPS/GEPS (line clock source).....................................................10-4Figure 10-3 Clock synchronization in the GTCS...............................................................................................10-4Figure 10-4 BSC clock synchronization procedure (BITS clock source)..........................................................10-5Figure 10-5 BSC clock synchronization procedure (line clock source).............................................................10-6Figure 10-6 BSC clock synchronization procedure (BITS clock source)..........................................................10-6Figure 11-1 Power lead-in part (common power distribution box)....................................................................11-1Figure 11-2 Power lead-in part (high-power distribution box)..........................................................................11-2Figure 12-1 Principle of power monitoring........................................................................................................12-2Figure 12-2 Principle of fan monitoring.............................................................................................................12-3Figure 12-3 Principle of environment monitoring.............................................................................................12-3Figure 13-1 Network topology of the BSC OM (in BSC hardware configuration type A)...............................13-2Figure 13-2 Network topology of the BSC OM (in BSC hardware configuration type B)................................13-3Figure 13-3 Principle of the offline data configuration......................................................................................13-7Figure 13-4 Principle of the online data configuration......................................................................................13-8Figure 13-5 Procedure of the BSC data consistency check..............................................................................13-10Figure 13-6 BSC data synchronization procedure ...........................................................................................13-10Figure 13-7 BSC performance management process.......................................................................................13-11Figure 13-8 Alarm management process of the BSC.......................................................................................13-12Figure 13-9 Working principle of the alarm box .............................................................................................13-13Figure 13-10 BSC loading process (1).............................................................................................................13-14Figure 13-11 BSC loading process (2).............................................................................................................13-15Figure 13-12 BSC loading process (3).............................................................................................................13-15Figure 14-1 CS signal flow (1)...........................................................................................................................14-2Figure 14-2 CS signal flow (2)...........................................................................................................................14-3Figure 14-3 CS signal flow (3)...........................................................................................................................14-3Figure 14-4 CS signal flow (4)...........................................................................................................................14-4Figure 14-5 CS signal flow (5)...........................................................................................................................14-5

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Figure 14-6 CS signal flow (6)...........................................................................................................................14-5Figure 14-7 PS signal flow (Abis over TDM)....................................................................................................14-6Figure 14-8 PS signal flow (Abis over IP).........................................................................................................14-7Figure 14-9 BSC PS signal flow (external PCU )..............................................................................................14-7Figure 14-10 Protocol stack on the Abis interface (Abis over TDM)................................................................14-8Figure 14-11 Signaling Flow on the Abis Interface (Abis over TDM)..............................................................14-9Figure 14-12 Protocol stack on the Abis interface (Abis over HDLC)..............................................................14-9Figure 14-13 Signaling Flow on the Abis Interface (Abis over HDLC)..........................................................14-10Figure 14-14 Protocol stack on the Abis interface (Abis over IP)...................................................................14-10Figure 14-15 Signaling Flow on the Abis Interface (Abis over IP).................................................................14-11Figure 14-16 Protocol stack on the A interface (A over TDM).......................................................................14-12Figure 14-17 Signaling flow on the A interface (A over TDM) (BM/TC separated)......................................14-12Figure 14-18 Signaling flow on the A interface (A over TDM) (BM/TC combined).....................................14-13Figure 14-19 Protocol stack on the A interface (A over IP).............................................................................14-13Figure 14-20 Signaling flow on the A interface (A over IP)............................................................................14-14Figure 14-21 Protocol stack on the Pb interface..............................................................................................14-14Figure 14-22 Signaling flow on the Pb interface.............................................................................................14-15Figure 14-23 Protocol stack on the Gb interface..............................................................................................14-15Figure 14-24 Signaling flow on the Gb interface.............................................................................................14-16Figure 14-25 OM signal flow (GTCS configured on the BSC side)................................................................14-17Figure 14-26 OM signal flow (GTCS configured on the MSC side)...............................................................14-18Figure 14-27 BSC OM signal flow (BM/TC combined).................................................................................14-19Figure 14-28 BSC OM signal flow (A over IP)...............................................................................................14-20Figure 15-1 E1/T1-based TDM networking on the Abis interface....................................................................15-2Figure 15-2 STM-1-based TDM networking on the Abis interface...................................................................15-3Figure 15-3 E1/T1-based HDLC networking on the Abis interface..................................................................15-3Figure 15-4 STM-1-based HDLC networking on the Abis interface.................................................................15-4Figure 15-5 Hybrid networking (Abis over TDM and Abis over HDLC) (configuration mode 1)...................15-4Figure 15-6 Hybrid networking (Abis over TDM and Abis over HDLC) (configuration mode 2)...................15-5Figure 15-7 MSTP-based IP networking on the Abis interface.........................................................................15-5Figure 15-8 Data-network-based IP networking on the Abis interface..............................................................15-6Figure 15-9 E1/T1-based TDM networking on the A interface (1)...................................................................15-7Figure 15-10 E1/T1-based TDM networking on the A interface (2).................................................................15-7Figure 15-11 STM-1-based TDM networking on the A interface (1)................................................................15-7Figure 15-12 STM-1-based TDM networking on the A interface (2)................................................................15-8Figure 15-13 IP networking on the A interface (1)............................................................................................15-8Figure 15-14 IP networking on the A interface (2)............................................................................................15-9Figure 15-15 E1/T1-based TDM networking on the Pb interface......................................................................15-9Figure 15-16 STM-1-based TDM networking on the Pb interface..................................................................15-10Figure 15-17 E1/T1-based networking on the Ater interface (GTCS configured on the BSC side)................15-10Figure 15-18 E1/T1-based networking on the Ater interface (GTCS configured on the MSC side)...............15-10Figure 15-19 STM-1-based networking on the Ater interface (GTCS configured on the MSC side).............15-11

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Figure 15-20 E1/T1-based FR networking on the Gb interface.......................................................................15-11Figure 15-21 FE/GE-based IP networking on the Gb interface.......................................................................15-12

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Tables

Table 2-1 Functions of each NE in the GSM/GPRS network..............................................................................2-2Table 3-1 Components of the BSC.......................................................................................................................3-2Table 3-2 Components in the BSC Cabinet..........................................................................................................3-4Table 4-1 Recommended configuration of the BSC............................................................................................ 4-9Table 4-2 Recommended configuration of the BSC..........................................................................................4-12Table 4-3 Recommended configuration of the BSC..........................................................................................4-14Table 4-4 Recommended configuration of the BSC..........................................................................................4-18Table 4-5 Recommended configuration of the BSC..........................................................................................4-22Table 4-6 Recommended configuration of the BSC..........................................................................................4-24Table 9-1 Physical entities of the BSC interface processing subsystem..............................................................9-2Table 13-1 Definitions of the BSC user authorities...........................................................................................13-4Table 13-2 BSC logs...........................................................................................................................................13-5Table 16-1 Capacity specification of the BSC...................................................................................................16-2Table 16-2 Structural specifications...................................................................................................................16-3Table 16-3 Power consumption specifications...................................................................................................16-3Table 16-4 Power supply and EMC specifications of the BSC..........................................................................16-3Table 16-5 Specifications of the external transmission interfaces of the BSC...................................................16-4Table 16-6 Specifications of the internal transmission interfaces of the BSC...................................................16-7Table 16-7 Specifications of the clock interfaces of the BSC............................................................................16-8Table 16-8 Reliability specifications of the BSC...............................................................................................16-8Table 16-9 Clock specifications of the BSC......................................................................................................16-9Table 16-10 Specifications of the noise and safety compliance of the BSC .....................................................16-9Table 16-11 Climatic requirements (storage)...................................................................................................16-10Table 16-12 Requirements for physically active materials (storage)...............................................................16-11Table 16-13 Requirements for chemically active materials (storage)..............................................................16-12Table 16-14 Mechanical stress requirements (storage)....................................................................................16-12Table 16-15 Requirements for the climate (transportation).............................................................................16-13Table 16-16 Requirements for physically active materials (transportation)....................................................16-14Table 16-17 Requirements for chemically active materials (transportation)...................................................16-14Table 16-18 Requirements for the mechanical stress (transportation).............................................................16-14Table 16-19 Temperature and humidity requirements.....................................................................................16-15Table 16-20 Other requirements.......................................................................................................................16-15Table 16-21 Requirements for physically active materials (operating)............................................................16-16

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Table 16-22 Requirements for chemically active materials (operating)..........................................................16-16Table 16-23 Mechanical Stress Requirements.................................................................................................16-17Table 16-24 Hardware configuration specifications of the GBAM (IBM X3650T)........................................16-18Table 16-25 Hardware configuration specifications of the GBAM (Huawei C5210)......................................16-18Table 16-26 Hardware configuration specifications of the GBAM (HP CC3310)..........................................16-18Table 16-27 Performance specifications of the GBAM...................................................................................16-19Table 16-28 Hardware configuration specifications of the GOMU.................................................................16-19Table 16-29 Performance specifications of the GOMU...................................................................................16-20Table 16-30 Technical specifications of the BSC power distribution box.......................................................16-20Table 16-31 Technical specifications of the BSC high-power distribution box..............................................16-21

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About This Document

PurposeThis document describes the structure, components, and working principles of the BSC in termsof hardware, software, and logic. It also describes the transport and networking, signal flows,and technical specifications of the BSC.

Product VersionThe following table lists the product version related to this document.

Product Name Model Product Version

BSC BSC6000 V900R008C11

Intended AudienceThis document is intended for:

l Network planners

l System engineers

l Field engineers

Organization1 Changes in BSC Product Description

This describes the changes in the BSC Product Description.

2 Position of the BSC in the GSM/GPRS Network

In the GSM/GPRS network, the BSC is located between the BTS and the MSC or between theBTS and the PCU. The BSC performs the following functions: radio resource management, BTSmanagement, power control, and handover control.

3 Introduction to the BSC

This describes the physical, logical, and software structures of the BSC.

4 BSC Hardware Configuration

The GBAM and GOMU are the operation and maintenance entities of the BSC. There are twotypes of BSC hardware configuration: configuration type A and configuration type B. In

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configuration type A, the BSC is configured with the GBAM. In configuration type B, the BSCis configured with the GOMU. One BSC can use only one configuration type.

5 BSC TDM Switching Subsystem

The Time Division Multiplexing (TDM) switching subsystem performs data exchange in thecircuit switched (CS) domain.

6 BSC GE Switching Subsystem

The Gigabit Ethernet (GE) switching subsystem performs the GE switching and packet switchingof the signaling and OM information in the BSC.

7 BSC Service Processing Subsystem

The BSC service processing subsystem performs voice coding/decoding, rate matching, and PSservice processing.

8 BSC Service Control Subsystem

The BSC service control subsystem performs the following functions: paging control, systeminformation management, channel assignment, BTS public service management, call control,packet service control, handover and power control, cell broadcast short message service, BTSOM, and TC resource pool management.

9 BSC Interface Processing Subsystem

The BSC interface and signaling processing subsystem processes the signaling on the BSCinterfaces.

10 BSC Clock Subsystem

The BSC clock subsystem consists of the GGCU and the clock processing unit in each subrack.The clock subsystem provides the working clock for the BSC and provides the reference clockfor the BTS.

11 BSC Power Subsystem

The BSC power subsystem adopts dual-circuit redundancy and point-by-point monitoringsolution, which is highly reliable. The BSC power subsystem comprises the power lead-in partand the power distribution part.

12 BSC Environment Monitoring Subsystem

The BSC environment monitoring subsystem comprises the power distribution box and theenvironment monitoring parts in each subrack. The environment monitoring subsystem monitorsand adjusts the power supply, the speed of the fans, and the working environment.

13 OM of the BSC

This describes two OM modes and various OM functions of the BSC.

14 BSC Signal Flow

The BSC signal flow consists of the CS service signal flow, PS service signal flow, signalingflow, and OM signal flow.

15 BSC Transmission and Networking

This describes various transmission and networking modes between the BSC and other NEs.

16 BSC Technical Specifications

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The BSC technical specifications consist of the capacity specifications, engineeringspecifications, physical port specifications, reliability specifications, clock precisionspecifications, noise and safety compliance, and environment specifications.

ConventionsSymbol Conventions

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

Symbol Description

Indicates a hazard with a high level of risk, which if notavoided,will result in death or serious injury.

Indicates a hazard with a medium or low level of risk, whichif not avoided, could result in minor or moderate injury.

Indicates a potentially hazardous situation, which if notavoided,could result in equipment damage, data loss,performance degradation, or unexpected results.

Indicates a tip that may help you solve a problem or savetime.

Provides additional information to emphasize or supplementimportant points of the main text.

General Conventions

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

Convention Description

Times New Roman Normal paragraphs are in Times New Roman.

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

Italic Book titles are in italics.

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

Command Conventions

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


Boldface The keywords of a command line are in boldface.

Italic Command arguments are in italics.



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

{ x | y | ... } Optional items are grouped in braces and separated byvertical bars. One item is selected.

[ x | y | ... ] Optional items are grouped in brackets and separated byvertical bars. One item is selected or no item is selected.

{ x | y | ... }* Optional items are grouped in braces and separated byvertical bars. A minimum of one item or a maximum of allitems can be selected.

[ x | y | ... ]* Optional items are grouped in brackets and separated byvertical bars. Several items or no item can be selected.

GUI Conventions

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


Boldface Buttons, menus, parameters, tabs, window, and dialog titlesare in boldface. For example, click OK.

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

Keyboard Operations

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

Format Description

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

Key 1+Key 2 Press the keys concurrently. For example, pressing Ctrl+Alt+A means the three keys should be pressed concurrently.

Key 1, Key 2 Press the keys in turn. For example, pressing Alt, A meansthe two keys should be pressed in turn.

Mouse Operations

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

Action Description

Click Select and release the primary mouse button without movingthe pointer.

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Action Description

Double-click Press the primary mouse button twice continuously andquickly without moving the pointer.

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



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1 Changes in BSC Product Description

This describes the changes in the BSC Product Description.

V900R008C11 02(2008-10-20)This is the second commercial release.

Compared with V900R008C11 01(2008-08-21), no information is added.

Compared with V900R008C11 01(2008-08-21), the following information is modified:

Item Change

13.2.7 BTS Loading Management BTS Loading Management is changed.

Compared with V900R008C11 01(2008-08-21), no information is deleted.

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2 Position of the BSC in the GSM/GPRSNetwork

In the GSM/GPRS network, the BSC is located between the BTS and the MSC or between theBTS and the PCU. The BSC performs the following functions: radio resource management, BTSmanagement, power control, and handover control.

Position of the BSC in the GSM/GPRS NetworkFigure 2-1 shows the position of the BSC in the GSM/GPRS network.

HUAWEI BSC6000 Base Station ControllerBSC Product Description 2 Position of the BSC in the GSM/GPRS Network


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Figure 2-1 Position of the BSC in the GSM/GPRS network

BSC

BTS

PCU

SGSN

MSC/VLR

AUC/HLR

ISDN/PSTN...

BTS

BTS: base transceiver station BSC: base stationcontroller

PCU: packet control unit SGSN: serving GPRSsupport node

AUC: authentication center HLR: home locationregister

MSC: mobile serviceswitching center

VLR: visitor locationregister

ISDN: integrated servicesdigital network

PSTN: public switchedtelephone network

NOTE

As shown in Figure 2-1, the PCU is fully controlled by the BSC. In this case, the BSC is directly connectedto the SGSN.

Functions of each NE in the GSM/GPRS Network

Table 2-1 describes the functions of each NE in the GSM/GPRS network.

Table 2-1 Functions of each NE in the GSM/GPRS network

NE Description of Functions

BTS The BTS performs the following functions: power control, handovercontrol, transmission and reception of radio signals, coding/decodingof the signals on the Um interface, and encryption/decryption of thesignals on the Um interface.

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NE Description of Functions

BSC The BSC performs the following functions: radio resourcemanagement, connection management, and BTS management.

PCU The PCU performs the following functions: packet radio resourcemanagement, packet call control, transmission of data packet on thePb and Gb interfaces.

SGSN The SGSN performs the following functions: data packettransmission, network congestion detection, network status detection,and network management.

MSC The MSC performs the following functions: call control, routeselection, radio resource allocation, mobility management, locationregistration, handover control, bill statistics and collection, andservice coordination between the mobile switching network and thePSTN.

VLR The VLR stores the temporary information about the MSs.

AUC The AUC stores the information about the private keys of MSs, andauthenticates the validity of the MSs.

HLR The HLR is a database used for managing MSs. It stores the followinginformation: MS subscription information, location of each MS,MSISDN, and IMSI.

HUAWEI BSC6000 Base Station ControllerBSC Product Description 2 Position of the BSC in the GSM/GPRS Network


2-3

3 Introduction to the BSC

About This Chapter

This describes the physical, logical, and software structures of the BSC.

3.1 BSC Physical StructureThis describes the physical structure of the BSC, including the cabinet, cables, LMT computers,and alarm box.

3.2 BSC Logical StructureLogically, the BSC system consists of the time division multiplexing (TDM) switchingsubsystem, Gigabit Ethernet (GE) switching subsystem, service processing subsystem, servicecontrol subsystem, interface processing subsystem, clock subsystem, power subsystem, andenvironment monitoring subsystem.

3.3 BSC Software StructureThe software of the BSC has a distributed architecture. It is classified into the host software,OMU software, and LMT software.

HUAWEI BSC6000 Base Station ControllerBSC Product Description 3 Introduction to the BSC


3-1

3.1 BSC Physical StructureThis describes the physical structure of the BSC, including the cabinet, cables, LMT computers,and alarm box.

Physical Structure of the BSC

Figure 3-1 shows the physical structure of the BSC.

Figure 3-1 Physical structure of the BSCOM equipment room

LMT

LMT

……

……

Alarm box

Serial port cable

Ethernet cable

Ethernet cable

GBCR GBSR GBSR

Equipment roomOptical cable to other NEsTrunk cable to other NEs

PGND cable to the PDFEthernet cable to other NEs

Power cable to the PDF

LMT: Local Maintenance Terminal PDF: Power Distribution Frame

Table 3-1 lists the components of the BSC.

Table 3-1 Components of the BSC

Component Description Refer to...

GBCR The GBCR provides switchingand processes services for theBSC. One GBCR is configuredin a BSC.

GBCR (Configuration Type A)and GBCR (Configuration TypeB)

GBSR The GBSR processes variousservices for the BSC. Thenumber of GBSRs to beconfigured depends on thetraffic volume. Zero to threeGBSRs can be configured.

GBSR Cabinet

3 Introduction to the BSCHUAWEI BSC6000 Base Station Controller



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Component Description Refer to...

BSC Cables BSC cables are classified intothe Ethernet cable, optical cable,and trunk cable. The number ofBSC cables to be configureddepends on actual requirements.

BSC Cables

BSC LMT The LMT is a computer that isinstalled with the LMT softwarepackage and is connected to theOM network of the NEs. It ismandatory for the BSC.

LMT-Related Definitions

Alarm box The alarm box can generateaudible and visual alarms. It isoptional for the BSC.

User manual delivered with thealarm box

Components of the BSC CabinetFigure 3-2 shows the front view of the BSC cabinet.



3-3

Figure 3-2 Front view of the BSC cabinet

Table 3-2 describes the components in the BSC cabinet.

Table 3-2 Components in the BSC Cabinet

BSCSubrack

Description Refer to...

GMPS The GMPS is configured in the GBCR.Each BSC must be configured withone GMPS.

Configuration of the GMPS(Configuration Type A) andConfiguration of the GMPS(Configuration Type B)




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BSCSubrack

Description Refer to...

GEPS The GEPS is configured in the GBCRor GBSR. The BSC can be configuredwith zero to three GEPSs.

Configuration of the GEPS

GTCS The GTCS is configured in the GBCRor GBSR. The BSC can be configuredwith zero to four GTCSs.

Configuration of the GTCS

Powerdistribution box

Each cabinet must be configured withone power distribution box.

l BSC Common Power DistributionBox

l BSC High-Power Distribution Box

GIMS A set of the KVM, GBAM, and LANswitch is referred to as the GSMIntegrated Management System(GIMS). The GIMS is configured insubrack 0 of the GBCR.If the BSC adopts ConfigurationType A, the GIMS is mandatory.Otherwise, the GIMS is not required.

l KVM

l LAN Switch

l GBAM

3.2 BSC Logical StructureLogically, the BSC system consists of the time division multiplexing (TDM) switchingsubsystem, Gigabit Ethernet (GE) switching subsystem, service processing subsystem, servicecontrol subsystem, interface processing subsystem, clock subsystem, power subsystem, andenvironment monitoring subsystem.

Figure 3-3 shows the logical structure of the BSC.



3-5

Figure 3-3 Logical structure of the BSC

Service processing subsystem

Service control

subsystem

Interface processing subsystem

Environment monitoring subsystem

GBAM/GOMU

LMT/M2000

To BTSTo PCU/SGSNTo MSC/MGW

TDM switching

subsystem

GE switching

subsystem

Clock subsystem

Power subsystem

The interface processing subsystem of the BSC provides the Pb or Gb interface, depending onthe types of PCU.l When the built-in PCU is used, the interface processing subsystem provides the Gb interface

to enable the communication between the BSC and the SGSN.l When the external PCU is used, the interface processing subsystem provides the Pb

interface to enable the communication between the BSC and the PCU.

The interface processing subsystem of the BSC cannot provide the Gb interface and Pb interfacesimultaneously.

The interface processing subsystem supports different transmission modes over the A interface:l When the IP transmission is used, the A interface enables the communication between the

BSC and the MGW.l When the TDM transmission is used, the A interface enables the communication between

the BSC and the MSC/MGW.

The interface processing subsystem of the BSC does not support the two transmission modessimultaneously.

3.3 BSC Software StructureThe software of the BSC has a distributed architecture. It is classified into the host software,OMU software, and LMT software.

Host SoftwareThe host software runs on various service boards. It consists of the operating system, middleware,and application software. Figure 3-4 shows the structure of the host software.




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Figure 3-4 Structure of the host software

Operating system

Middleware

Application software

l Operating system

The operating system adopted in the BSC is VxWorks, which is an embedded real-timeoperating system.

l Middleware

The Distributed Object-oriented Programmable Realtime Architecture (DOPRA) andPlatform of Advanced Radio Controller (PARC) middleware ensure that the upper-levelapplication software is independent of the lower-level operating system. The middlewareenables software functions to be transplanted between different platforms.

l Application software

Different boards are configured with different types of application software. Theapplication software is classified into radio resource processing software, resource controlplane processing software, BTS management software, and configuration management andmaintenance software.

OMU Software

The operation maintenance unit (OMU) software runs on the GBAM server or on the GOMUto perform the operation and maintenance of the BSC. Figure 3-5 shows the structure of theOMU software.

Figure 3-5 Structure of the OMU software

OMU software

Middleware

Operating system

l Operating system

The OMU software runs on the Linux operating system.

l Middleware



3-7

The DOPRA middleware ensures that the upper-level application software is independentof the lower-level operating system. Thus, the middleware enables software functions tobe transplanted between different platforms.

l Application softwareThe application software performs the functions of different logical entities in the GBAM/GOMU.

LMT SoftwareThe LMT software, which consists of the operating system and application software, runs onthe LMT computer. Figure 3-6 shows the structure of the LMT software.

Figure 3-6 Structure of LMT software

Operating system

Application software

l Operating system

The LMT runs on the Windows 2000 Professional or Windows XP Professional operatingsystem.

l Application softwareThe application software provides access to the operation and maintenance of the BSC.The software package consists of the BSC6000 Local Maintenance Terminal, BSC6000Online Help, Site Maintenance Terminal System, LMT Service Manager, LocalMaintenance Terminal, Performance Browser tool, and Convert Management System.

NOTE

The BSC6000 Local Maintenance Terminal provides a graphic user interface (GUI) for performingoperation and maintenance. The Local Maintenance Terminal is also called the MML client, whichprovides MML commands for the users. Both of them support the maintenance and data configurationof the BSC and the BTSs connected to the BSC.




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4 BSC Hardware Configuration

About This Chapter

The GBAM and GOMU are the operation and maintenance entities of the BSC. There are twotypes of BSC hardware configuration: configuration type A and configuration type B. Inconfiguration type A, the BSC is configured with the GBAM. In configuration type B, the BSCis configured with the GOMU. One BSC can use only one configuration type.

4.1 BSC Hardware ConfigurationThis describes three types of BSC subracks, two installation modes of the GTCS, threecombination modes of BSC subracks, two types of PCU, and two types of hardwareconfiguration.

4.2 BSC Hardware Configuration Type AThe BSC hardware configuration type A refers to the BSC configured with the GBAM, whichenables the communication between the BSC and the LMT. The number of BSC cabinets andBSC subracks varies with the capacity requirements for the BSC.

4.3 BSC Hardware Configuration Type BIn BSC hardware configuration type B, the BSC is configured with the GOMU, which enablesthe communication between the BSC and the LMT. The number of BSC cabinets and BSCsubracks varies with the capacity requirements for the BSC.

HUAWEI BSC6000 Base Station ControllerBSC Product Description 4 BSC Hardware Configuration


4-1

4.1 BSC Hardware ConfigurationThis describes three types of BSC subracks, two installation modes of the GTCS, threecombination modes of BSC subracks, two types of PCU, and two types of hardwareconfiguration.

BSC Subrack

The BSC subracks can be classified into the following types:

l GMPS

l GEPS

l GTCS

Generally, both the GMPS and GEPS are referred to as the BM subrack, and the GTCS is referredto as the TC subrack.

Both the BM subracks and the TC subracks have two interconnection modes.

l Inter-Subrack TDM Interconnections

The inter-subrack TDM interconnections between one BM subrack and another BMsubrack and between one TC subrack and another TC subrack are established through theinter-GTNU cables. 5.1 Physical Structure of the BSC TDM Switching Subsystem

l Inter-Subrack GE Interconnections

The GSCUs in the BM subracks or in the TC subracks are connected in star topology. Thesubrack located in the center of the star topology is referred to as the main subrack, and thesubracks connected to the main subrack are referred to as extension subracks. For the inter-subrack GE interconnection of BM subracks, the GMPS must be the main subrack, and theGEPS must be the extension subrack. For the inter-subrack GE interconnection of TCsubracks, any TC subrack can be the main subrack, and the other TC subracks must beextension subracks. 6.1 Physical Structure of the BSC GE Switching Subsystem

Installation Modes of the GTCS

The installation modes of the GTCS are classified into local configuration and remoteconfiguration based on the location of the GTCS.

In local configuration mode, the GTCS and the GMPS/GEPS can be configured in the samecabinet. In this case, the GSCU in the GMPS and the GSCU in the GTCS are connected throughcrossover cables.

In remote configuration mode, the GTCS and the GMPS/GEPS are configured in differentsubracks. In other words, the GTCSs are configured in an independent GBSR. In this case, theGSCU in the GMPS is not connected to the GSCU in the GTCS.

l Figure 4-1 shows the OM path between the GMPS and the GTCS in the case of the localconfiguration mode.

l Figure 4-2 shows the OM path between the GMPS and the GTCS in the case of the remoteconfiguration mode.

4 BSC Hardware ConfigurationHUAWEI BSC6000 Base Station Controller



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Figure 4-1 OM path between the GMPS and the main GTCS (in local GTCS mode)

GMPS

GSCU

GBAM/GOMU

Main GTCS

GSCU

Extension GTCS

GSCU

Service board

Service board

Service board

OM information

Figure 4-2 OM path between the GMPS and the main GTCS (in remote GTCS mode)

OM informationGBAM/GOMU

GSCU

Extension GTCS

Service board

GMPS

GSCU GEIUT

Service board

GSCU

GEIUT

Service board

Main GTCS

As shown in Figure 4-1, when OM is performed on the local GTCS, the OM information iscarried by the GE link between the GSCU in the GMPS and the GSCU in the main GTCS. Thetransmission rate is fast.

As shown in Figure 4-2, when OM is performed on the remote GTCS, the OM information iscarried by the E1/T1 link between the GEIUT/GOIUT in the GMPS and the GEIUT/GOIUT inthe main GTCS. The transmission rate is slow.

The application scenarios of the local GTCS and remote GTCS are as follows: If the distancebetween the GSCU in the GMPS and the GSCU in the main GTCS exceeds the maximum lengthof a crossover cable, the remote GTCS should be configured. Otherwise, the local GTCS shouldbe configured. The maximum length of the crossover cables delivered on site is 10 m. If thedistance between the GMPS and the main GTCS exceeds 10 m, the remote GTCS should beconfigured. Otherwise, the local GTCS should be configured.



4-3

Configuration Modes of BSC Subracks

The BSC subracks support the following configuration modes:

l BM/TC separated

In BM/TC separated configuration mode, the BSC consists of the GMPS/GEPS and GTCS.The GTCS can be configured on the BSC side or on the MSC side.

Characteristics: In this configuration mode, the GTCS can be configured flexibly. TheGTCS can be configured in an independent GBSR on the MSC side, thus saving thetransmission resources between the BSC and the MSC. The GTCS can be configured onthe BSC side and share a cabinet with other subracks.

l BM/TC combined

In BM/TC combined configuration mode, the TC function is performed by the GMPS orGEPS. When the TC is configured in the GMPS, the subrack is still referred to as the GMPS.When the TC is configured in the GEPS, the subrack is still referred to as the GEPS. InBM/TC combined configuration mode, the TC function is performed by the GDPUX.

Characteristics: Compared with the BM/TC separated configuration mode, the BSC in BM/TC combined configuration mode has a high density of integration. In addition, when thecapacity is the same, the BSC in BM/TC combined configuration mode has fewer cabinetsand subracks.

l A over IP

In A over IP configuration mode, the BSC consists of the GMPS/GEPS and is notconfigured with the GTCS. In this case, layer 3 of the A interface protocol stack uses IP,and the TC function is performed by the MGW. Thus, the GTCS is not required.

Characteristics: In A over IP configuration mode, the BSC has few cabinets and subracks.In this case, the BSC must be connected to the Huawei MGW.

Types of PCU

The BSC supports two types of PCU: built-in PCU and external PCU.

l The external PCU is an independent network element that provides PS service processingfunctions. It communicates with the BSC over the Pb interface, and communicates withthe SGSN over the Gb interface.

Characteristics: The external PCU requires a large floor area and is difficult for installationand maintenance.

l The built-in PCU is the GDPUP, which provides PS service processing functions. TheGDPUP is configured in the GMPS/GEPS.

Application scenario: Compared with the external PCU, the built-in PCU is a board thatcan be installed in a BSC subrack. The built-in PCU features small footprint, easy cabling,and convenient installation and maintenance.

The requirements for the configuration of the PCU vary with the transmission modes over theAbis interface.

l When the HDLC protocol is used for layer 2 or the IP protocol is used for layer 3 of theprotocol stack on the Abis interface, the BSC must use the built-in PCU.

l If TDM transmission is used over the Abis interface, the BSC can use either the built-inPCU or the external PCU.




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BSC Hardware Configuration Types

The BSC supports two types of server: GBAM and GOMU. The GBAM/GOMU enables thecommunication between the Local Maintenance Terminal and the BSC.

l The GBAM is independent from the BSC components. It is connected to the GSCU in theGMPS through the FE/GE port. If the GBAM is used, it is configured in subrack 0 of theGBCR.

Characteristics: The GBAM occupies the space of one subrack in the GBCR. In addition,the cable connections for the GBAM are complex.

l The GOMU is a type of board in the BSC. One GOMU occupies two slots. The GOMUshould be installed in slots 00 to 03 or slots 20 to 23 in the GMPS.

Characteristics: Compared with the GBAM, the GOMU requires a small installation space.In addition, the GOMU features simple cable connection and easy installation andmaintenance.

The BSC hardware configuration is classified into configuration type A and configuration typeB based on the server used.

l In configuration type A, the BSC is configured with the GBAM.

l In configuration type B, the BSC is configured with the GOMU. Compared withconfiguration type A, the BSC in configuration type B can save a subrack. In addition, thecable connection is simple and the installation and maintenance is easy.

4.2 BSC Hardware Configuration Type AThe BSC hardware configuration type A refers to the BSC configured with the GBAM, whichenables the communication between the BSC and the LMT. The number of BSC cabinets andBSC subracks varies with the capacity requirements for the BSC.

4.2.1 BM/TC Separated (Configuration Type A)In the BM/TC separated (configuration type A), the BSC is configured with the GBAM, and theBM and TC are configured in different subracks. The following describes the maximum,minimum, and recommended configurations.

4.2.2 BM/TC Combined (Configuration Type A)In the BM/TC combined (configuration type A), the BSC is configured with the GBAM, andthe BM and TC are configured in the same subrack. The following describes the maximum,minimum, and recommended configurations.

4.2.3 A over IP (Configuration Type A)In the A over IP (configuration type A), the BSC is configured with the GBAM, and IPtransmission is used on the A interface. The following describes the maximum, minimum, andrecommended configurations.

4.2.1 BM/TC Separated (Configuration Type A)In the BM/TC separated (configuration type A), the BSC is configured with the GBAM, and theBM and TC are configured in different subracks. The following describes the maximum,minimum, and recommended configurations.



4-5

Minimum ConfigurationIn the minimum configuration, the BSC is configured with one GMPS, one GTCS, and oneGIMS. In this case, the BSC supports 512 TRXs. The number of cabinets to be configured varieswith the location of the GTCS.

l When the GTCS is configured on the BSC side, a minimum of one cabinet must beconfigured, as shown in Figure 4-3.

l When the GTCS is configured on the MSC side, a minimum of two cabinets must beconfigured, as shown in Figure 4-4.

Figure 4-3 BSC minimum configuration (GTCS configured on the BSC side)

GBCR

GTCS

GMPS

GIMS

Figure 4-4 BSC minimum configuration (GTCS configured on the MSC side)

GBCR GBSR

Empty

GMPS

GIMS

Empty

Empty

GTCS

Maximum ConfigurationThe maximum configuration of the BSC is achieved through capacity expansion from itsminimum configuration. The BSC in the maximum configuration supports 2,048 TRXs. In




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maximum configuration, the number of cabinets to be configured varies with the transmissionmodes used on the A interface.

When E1/T1 transmission is used on the A interface, the BSC can be configured with one GMPS,three GEPSs, four GTCSs, and one GIMS in maximum configuration. The number of cabinetsto be configured varies, depending on the location of the GTCS.

l When the GTCS is configured on the BSC side, a maximum of three cabinets can beconfigured, as shown in Figure 4-5.

l When the GTCS is configured on the MSC side, a maximum four cabinets can beconfigured, as shown in Figure 4-6.

Figure 4-5 BSC maximum configuration (GTCS configured on the BSC side)

GBSR

GTCS

GTCS

GTCS

GBCR

GEPS

GMPS

GIMS

GBSR

GTCS

GEPS

GEPS

Figure 4-6 BSC maximum configuration (GTCS configured on the MSC side)

GBCR

GEPS

GMPS

GIMS

GBSR

Empty

GEPS

GEPS

GBSR

GTCS

GTCS

GTCS

GBSR

Empty

Empty

GTCS

When STM-1 transmission is used on the A interface, the BSC can be configured with oneGMPS, two GEPSs, two GTCSs, and one GIMS in maximum configuration.



4-7

l When the GTCS is configured on the BSC side, a maximum of two cabinets can beconfigured, as shown in Figure 4-7.

l When the GTCS is configured on the MSC side, a maximum of three cabinets can beconfigured, as shown in Figure 4-8.

Figure 4-7 BSC maximum configuration (GTCS configured on the BSC side)

GBCR

GEPS

GMPS

GIMS

GBSR

GTCS

GTCS

GEPS

Figure 4-8 BSC maximum configuration (GTCS configured on the MSC side)

GBCR

GEPS

GMPS

GIMS

GBSR

Empty

Empty

GEPS

GBSR

Empty

GTCS

GTCS

Recommended ConfigurationTable 4-1 lists the recommended configuration of the BSC. You can choose the appropriateconfiguration based on the actual requirements.




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Table 4-1 Recommended configuration of the BSC

Configuration

Number of Cabinets Number ofTRXs

Remarks

GTCSConfiguredon the BSCSide

GTCSConfigured onthe MSC Side

1×GMPS+1×GTCS+GIMS

1 2 512 The E1/T1 orSTM-1transmission isused on the Abis/Ater interface. TheE1/T1transmission isused on the Ainterface.

1×GMPS+1×GTCS+GIMS

1 2 512 The E1/T1 orSTM-1transmission isused on the Abis/Ater interface. TheSTM-1transmission isused on the Ainterface.

1xGMPS+1xGEPS+GIMS+2xGTCS

2 2 1 280 The E1/T1 orSTM-1transmission isused on the Abis/Ater interface. TheE1/T1transmission isused on the Ainterface.

1xGMPS+1xGEPS+GIMS+1xGTCS

2 2 1 280 The E1/T1 orSTM-1transmission isused on the Abis/Ater interface. TheSTM-1transmission isused on the Ainterface.



4-9

Configuration


Remarks

GTCSConfiguredon the BSCSide

GTCSConfigured onthe MSC Side

1×GMPS+3×GEPS+GIMS+4×GTCS

3 4 2 048 The E1/T1 orSTM-1transmission isused on the Abis/Ater interface. TheE1/T1transmission isused on the Ainterface.

1×GMPS+2×GEPS+GIMS+2×GTCS

2 3 2 048 The E1/T1 orSTM-1transmission isused on the Abis/Ater interface. TheSTM-1transmission isused on the Ainterface.

4.2.2 BM/TC Combined (Configuration Type A)In the BM/TC combined (configuration type A), the BSC is configured with the GBAM, andthe BM and TC are configured in the same subrack. The following describes the maximum,minimum, and recommended configurations.

Minimum ConfigurationIn minimum configuration, the BSC is configured with one GMPS and one GIMS, as shown inFigure 4-9.

Figure 4-9 BSC minimum configuration

GBCR

Empty

GMPS

GIMS




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In minimum configuration, the number of TRXs that can be configured varies with thetransmission modes used on the A interface.l If the E1/T1 transmission is used on the A interface, the BSC in the minimum configuration

supports 256 TRXs.l If the STM-1 transmission is used on the A interface, the BSC in the minimum configuration

supports 384 TRXs.

Maximum ConfigurationThe maximum configuration of the BSC is achieved through capacity expansion from itsminimum configuration. One BSC supports up to 2,048 TRXs and 15,360 speech channels. Inthe maximum configuration, the number of subracks to be configured varies with thetransmission modes used on the A interface.l When E1/T1 transmission is used on the A interface, the BSC can be configured with one

GMPS, three GEPSs, and one GIMS in maximum configuration. In this case, the BSCsupports up to 1,792 TRXs. See Figure 4-10.

l When STM-1 transmission is used on the A interface, the BSC can be configured with oneGMPS, two GEPSs, and one GIMS in maximum configuration. In this case, the BSCsupports up to 2,048 TRXs. See Figure 4-11.

Figure 4-10 BSC maximum configuration (E1/T1 transmission used on the A interface)

GBSR

Empty

GEPS

GEPS

GBCR

GEPS

GMPS

GIMS



4-11

Figure 4-11 BSC maximum configuration (STM-1 transmission used on the A interface)

GBSR

Empty

Empty

GEPS

GBCR

GEPS

GMPS

GIMS

Recommended Configuration

Table 4-2 lists the recommended configuration of the BSC. You can choose the appropriateconfiguration based on the actual requirements.


Configuration Number ofCabinets

Number ofTRXs

Remarks

1xGMPS+1xGIMS 1 256 The E1/T1, STM-1, or FE/GE transmission is used onthe Abis interface. The E1/T1 transmission is used onthe A interface.

1xGMPS+1xGIMS 1 384 The E1/T1, STM-1, or FE/GE transmission is used onthe Abis interface. TheSTM-1 transmission is usedon the A interface.

1×GMPS+1×GEPS+1×GIMS

1 768 The E1/T1, STM-1, or FE/GE transmission is used onthe Abis interface. The E1/T1 transmission is used onthe A interface.


1 1,280 The E1/T1, STM-1, or FE/GE transmission is used onthe Abis interface. TheSTM-1 transmission is usedon the A interface.




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Number ofTRXs

Remarks


2 1,280 The E1/T1, STM-1, or FE/GE transmission is used onthe Abis interface. The E1/T1 transmission is used onthe A interface.


2 2,048 The E1/T1, STM-1, or FE/GE transmission is used onthe Abis interface. TheSTM-1 transmission is usedon the A interface.


2 1,792 The E1/T1, STM-1, or FE/GE transmission is used onthe Abis interface. The E1/T1 transmission is used onthe A interface.

4.2.3 A over IP (Configuration Type A)In the A over IP (configuration type A), the BSC is configured with the GBAM, and IPtransmission is used on the A interface. The following describes the maximum, minimum, andrecommended configurations.

Minimum ConfigurationIn the minimum configuration, the BSC is configured with one GMPS. In this case, the BSCsupports 512 TRXs and 3,840 speech channels. See Figure 4-12.


GBCR

Empty

GMPS

GIMS



4-13

Maximum Configuration

The maximum configuration of the BSC is achieved through capacity expansion from itsminimum configuration. In the maximum configuration, the BSC is configured with one GMPSand two GEPSs, as shown in Figure 4-13. In this case, the BSC supports up to 2,048 TRXs and15,360 speech channels.

Figure 4-13 BSC maximum configuration

GBCR

GEPS

GMPS

GIMS

GBSR

Empty

Empty

GEPS





Number ofTRXs

Remarks

1xGMPS+1xGIMS 1 512 The E1/T1, STM-1, or FE/GEtransmission is used on the Abisinterface. The FE/GEtransmission is used on the Ainterface.


1 1 280 The E1/T1, STM-1, or FE/GEtransmission is used on the Abisinterface. The FE/GEtransmission is used on the Ainterface.


2 2 048 The E1/T1, STM-1, or FE/GEtransmission is used on the Abisinterface. The FE/GEtransmission is used on the Ainterface.




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4.3 BSC Hardware Configuration Type BIn BSC hardware configuration type B, the BSC is configured with the GOMU, which enablesthe communication between the BSC and the LMT. The number of BSC cabinets and BSCsubracks varies with the capacity requirements for the BSC.

4.3.1 BM/TC Separated (Configuration Type B)In the BM/TC separated (configuration type B), the BSC is configured with the active andstandby GOMUs, and the BM and TC are configured in different subracks. The followingdescribes the maximum, minimum, and recommended configurations.4.3.2 BM/TC Combined (Configuration Type B)In the BM/TC combined (configuration type B), the BSC is configured with the active andstandby GOMUs, and the BM and TC are configured in the same subrack. The followingdescribes the maximum, minimum, and recommended configurations.4.3.3 A over IP (Configuration Type B)In the A over IP (configuration type B), the BSC is configured with the active and standbyGOMUs, and IP transmission is used on the A interface. The following describes the maximum,minimum, and recommended configurations.

4.3.1 BM/TC Separated (Configuration Type B)In the BM/TC separated (configuration type B), the BSC is configured with the active andstandby GOMUs, and the BM and TC are configured in different subracks. The followingdescribes the maximum, minimum, and recommended configurations.

Minimum ConfigurationIn the minimum configuration, the BSC is configured with one GMPS and one GTCS. In thiscase, the BSC supports 512 TRXs and 3,840 speech channels.

The number of cabinets to be configured for a BSC varies with the location of the GTCS.

l When the GTCS is configured locally, a minimum of one cabinet must be configured, asshown in Figure 4-14.

l When the GTCS is configured remotely, a minimum of two cabinets must be configured,as shown in Figure 4-15.

Figure 4-14 BSC minimum configuration (GTCS configured locally)

GBCR

Empty

GTCS

GMPS



4-15

Figure 4-15 BSC minimum configuration (GTCS configured remotely)

GBCR

Empty

Empty

GMPS

GBSR

Empty

Empty

GTCS

Maximum ConfigurationThe maximum configuration of the BSC is achieved through capacity expansion from itsminimum configuration. One BSC supports up to 2,048 TRXs and 15,360 speech channels. Inmaximum configuration, the number of cabinets to be configured varies with the transmissionmodes used on the A interface.

When E1/T1 transmission is used on the A interface, the BSC can be configured with one GMPS,three GEPSs, and four GTCSs in maximum configuration. The number of cabinets to beconfigured varies, depending on the location of the GTCS.

l When the GTCS is configured locally, a maximum of three cabinets can be configured, asshown in Figure 4-16.

l When the GTCS is configured remotely, a maximum four cabinets can be configured, asshown in Figure 4-17.

Figure 4-16 BSC maximum configuration (GTCS configured locally)

GBCR GBSR GBSR

GEPS

GEPS

GMPS

GTCS

GTCS

GEPS

Empty

GTCS

GTCS




Issue 02 (2008-10-20)

Figure 4-17 BSC maximum configuration (GTCS configured remotely)

GBCR GBSR GBSR GBSR

GEPS

GEPS

GMPS

Empty

Empty

GEPS

GTCS

GTCS

GTCS

Empty

Empty

GTCS

If STM-1 transmission is used on the A interface, the BSC can be configured with one GMPS,two GEPSs, and two GTCSs in the maximum configuration.

l When the GTCS is configured locally, a maximum of two cabinets can be configured, asshown in Figure 4-18.

l When the GTCS is configured remotely, a maximum of two cabinets can be configured,as shown in Figure 4-19.

Figure 4-18 BSC maximum configuration (GTCS configured locally)

GBCR GBSR

GEPS

GEPS

GMPS

Empty

GTCS

GTCS



4-17

Figure 4-19 BSC maximum configuration (GTCS configured remotely)

GBCR GBSR

GEPS

GEPS

GMPS

Empty

GTCS

GTCS



Configuration


Remarks

GTCSConfiguredLocally

GTCSConfiguredRemotely

1 x GMPS +1 x GTCS

1 2 512 The E1/T1 orSTM-1transmission isused on the Abis/Ater interface. TheE1/T1transmission isused on the Ainterface.

1 x GMPS +1 x GTCS

1 2 512 The E1/T1 orSTM-1transmission isused on the Abis/Ater interface. TheSTM-1transmission isused on the Ainterface.




Issue 02 (2008-10-20)

Configuration


Remarks

GTCSConfiguredLocally

GTCSConfiguredRemotely

1 x GMPS +1 x GEPS +2 x GTCS

2 2 1,280 The E1/T1 orSTM-1transmission isused on the Abis/Ater interface. TheE1/T1transmission isused on the Ainterface.


1 2 1,280 The E1/T1 orSTM-1transmission isused on the Abis/Ater interface. TheSTM-1transmission isused on the Ainterface.


3 4 2,048 The E1/T1 orSTM-1transmission isused on the Abis/Ater interface. TheE1/T1transmission isused on the Ainterface.


2 2 2,048 The E1/T1 orSTM-1transmission isused on the Abis/Ater interface. TheSTM-1transmission isused on the Ainterface.

4.3.2 BM/TC Combined (Configuration Type B)In the BM/TC combined (configuration type B), the BSC is configured with the active andstandby GOMUs, and the BM and TC are configured in the same subrack. The followingdescribes the maximum, minimum, and recommended configurations.



4-19

Minimum ConfigurationIn minimum configuration, the BSC is configured with one GMPS, as shown in Figure 4-20.


GBCR

Empty

Empty

GMPS

In minimum configuration, the number of TRXs that can be configured varies with thetransmission modes used on the A interface.l If the E1/T1 transmission is used on the A interface, the BSC minimum configuration

supports 256 TRXs.l If the STM-1 transmission is used on the A interface, the BSC minimum configuration

supports 384 TRXs.

Maximum ConfigurationThe maximum configuration of the BSC is achieved through capacity expansion from itsminimum configuration. One BSC supports up to 2,048 TRXs and 15,360 speech channels. Inthe maximum configuration, the number of cabinets and subracks to be configured varies withthe transmission modes used on the A interface.l If E1/T1 transmission is used on the A interface, the BSC can be configured with one GMPS

and three GEPSs in maximum configuration. In this case, the BSC supports up to 1,792TRXs. See Figure 4-21.

l If STM-1 transmission is used on the A interface, the BSC can be configured with oneGMPS and two GEPSs in maximum configuration. In this case, the BSC supports up to2,048 TRXs. See Figure 4-22.




Issue 02 (2008-10-20)

Figure 4-21 BSC maximum configuration (E1/T1 transmission used on the A interface)

GBSR

Empty

Empty

GEPS

GBCR

GEPS

GEPS

GMPS

Figure 4-22 BSC maximum configuration (STM-1 transmission used on the A interface)

GBCR

GEPS

GEPS

GMPS




4-21


Configuration NumberofCabinets

Number ofTRXs

Remarks

1×GMPS 1 256 The E1/T1, STM-1, or FE/GEtransmission is used on the Abisinterface. The E1/T1 transmission isused on the A interface.

1×GMPS 1 384 The E1/T1, STM-1, or FE/GEtransmission is used on the Abisinterface. The STM-1 transmission isused on the A interface.

1×GMPS+1×GEPS

1 768 The E1/T1, STM-1, or FE/GEtransmission is used on the Abisinterface. The E1/T1 transmission isused on the A interface.

1×GMPS+1×GEPS

1 1,280 The E1/T1, STM-1, or FE/GEtransmission is used on the Abisinterface. The STM-1 transmission isused on the A interface.

1×GMPS+2×GEPS

1 1,280 The E1/T1, STM-1, or FE/GEtransmission is used on the Abisinterface. The E1/T1 transmission isused on the A interface.

1×GMPS+2×GEPS

1 2,048 The E1/T1, STM-1, or FE/GEtransmission is used on the Abisinterface. The STM-1 transmission isused on the A interface.

1×GMPS+3×GEPS

2 1,792 The E1/T1, STM-1, or FE/GEtransmission is used on the Abisinterface. The E1/T1 transmission isused on the A interface.

4.3.3 A over IP (Configuration Type B)In the A over IP (configuration type B), the BSC is configured with the active and standbyGOMUs, and IP transmission is used on the A interface. The following describes the maximum,minimum, and recommended configurations.

Minimum ConfigurationIn the minimum configuration, the BSC is configured with one GMPS. In this case, the BSCsupports 512 TRXs and 3,840 speech channels. See Figure 4-23.




Issue 02 (2008-10-20)


GBCR

Empty

Empty

GMPS

Maximum Configuration

The maximum configuration of the BSC is achieved through capacity expansion from itsminimum configuration. In the maximum configuration, the BSC is configured with one GMPSand two GEPSs, as shown in Figure 4-24. In this case, the BSC supports up to 2,048 TRXs and15,360 speech channels.

Figure 4-24 BSC maximum configuration

GBCR

GEPS

GEPS

GMPS





4-23



Number of TRXs Remarks

1×GMPS 1 512 The E1/T1, STM-1, orFE/GE transmission isused on the Abisinterface. The FE/GEtransmission is used onthe A interface.

1×GMPS+1×GEPS

1 1,280 The E1/T1, STM-1, orFE/GE transmission isused on the Abisinterface. The FE/GEtransmission is used onthe A interface.

1×GMPS+2×GEPS

1 2,048 The E1/T1, STM-1, orFE/GE transmission isused on the Abisinterface. The FE/GEtransmission is used onthe A interface.




Issue 02 (2008-10-20)

5 BSC TDM Switching Subsystem

About This Chapter

The Time Division Multiplexing (TDM) switching subsystem performs data exchange in thecircuit switched (CS) domain.

5.1 Physical Structure of the BSC TDM Switching SubsystemThe BSC TDM switching subsystem consists of the GTNU, GDPUX, interface boards,backplane in the subrack, and inter-GTNU cables.

5.2 Logical Structure of the BSC TDM Switching SubsystemLogically, the BSC TDM switching subsystem consists of the TDM switching unit, TDM accessunit, and TDM processing unit.

HUAWEI BSC6000 Base Station ControllerBSC Product Description 5 BSC TDM Switching Subsystem


5-1

5.1 Physical Structure of the BSC TDM SwitchingSubsystem

The BSC TDM switching subsystem consists of the GTNU, GDPUX, interface boards,backplane in the subrack, and inter-GTNU cables.

Inter-Subrack TDM Interconnections

Inter-subrack TDM interconnections are classified into two types:

l TDM interconnections between the GMPS and the GEPSThe TDM interconnections between the GMPS and the GEPS are established through theinter-GTNU cables, as shown in Figure 5-1.

l TDM interconnections between the GTCSsIn BM/TC separated configuration mode, the TDM interconnections between the GTCSsexist. The TDM interconnections between the GTCSs are also established through inter-GTNU cables, as shown in Figure 5-2.

Figure 5-1 TDM interconnections between GMPS and GEPS

GMPS/GEPS

GTNU

GTNU

GEPS

GTNU

GTNU

GEIUB

GEIUT

GEIUB

GEIUT

Active Standby StandbyActive

Figure 5-2 TDM interconnections between GTCSs

GTCS

GTNU

GTNU

GDPUX

GEIUA

GEIUT

GTCS

GTNU

GTNU

GDPUX

GEIUA

GEIUT

Active Standby StandbyActive

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In BM/TC separated configuration mode, the GMPS/GEPS communicates with the GTCS overthe Ater interface. In this case, there are no inter-subrack TDM interconnections between theGMPS/GEPS and the GTCS.

The BSC supports the TDM interconnections of up to four subracks. The combination of thefour subracks is as follows:

l One GMPS and three GEPSs

l Four GTCSs

Intra-Subrack TDM InterconnectionsFigure 5-3 shows the intra-subrack TDM interconnections of the GMPS/GEPS/GTCS. Notethat the TDM interconnections in the GMPS, GEPS, and GTCS are the same.

Figure 5-3 Intra-subrack TDM interconnections

Active GTNU Standby GTNU

……

GMPS/GEPS/GTCS

Service board 1 Service board 2 Service board 24

As shown in Figure 5-3, the GTNU works in active/standby mode. The other boards in thesubrack communicate with the active and standby GTNUs through the TDM paths of thebackplane.

5.2 Logical Structure of the BSC TDM Switching SubsystemLogically, the BSC TDM switching subsystem consists of the TDM switching unit, TDM accessunit, and TDM processing unit.

Figure 5-4 shows the logical structure of the BSC TDM switching subsystem.

HUAWEI BSC6000 Base Station ControllerBSC Product Description 5 BSC TDM Switching Subsystem


5-3

Figure 5-4 Logical structure of the BSC TDM switching subsystem

GMPS

TDM access unit

TDM switching unit

GEPS

TDM path on the backplane

GTCS

GTCS

E1/T1 cable or optical cable

TDM access unit

TDM access unit

TDM access unit

TDM processing unit

TDM switching unit

TDM switching

unit

TDM switching

unit TDM processing unit

Inter-GTNU cable

TDM Switching Unit

The functions of the TDM switching unit are performed by the GTNU. The TDM switching unitsupports 128Kx128K TDM switching and provides CS data switching links in the BSC. TheGTNU provides 30 low voltage differential signal (LVDS) high-speed serial ports. Where, 24LVDS high-speed serial ports enable the TDM switching between the ports on the GTNU paneland the backplane, and the other 6 LVDS high-speed serial ports enable the TDM switchingbetween GTNUs. Each route of the TDM switching has a bandwidth of 64 kbit/s.

TDM Access Unit

The functions of the TDM access unit are performed by the GEIUA/GOIUA, GEIUB/GOIUB,GEIUP/GOIUP, GEIUT/GOIUT. Each board supports 32Kx32K TDM switching. Each boardprovides two LVDS high-speed serial ports to enable the TDM switching between the port onthe board (GEIUA/GOIUA, GEIUB/GOIUB, GEIUP/GOIUP, or GEIUT/GOIUT) panel andthe backplane. As shown in Figure 5-4, the TDM switching between the GMPS/GEPS and theGTCS is performed by the GEIUT/GOIUT in each subrack.

TDM Processing Unit

The functions of the TDM processing unit are performed by the GDPUX. The TDM processingunit supports 16Kx16K TDM switching. Each GDPUX provides two LVDS high-speed serialports to enable the TDM switching between the digital signal processing (DSP) module in theGDPUX and the backplane.

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Issue 02 (2008-10-20)

6 BSC GE Switching Subsystem

About This Chapter

The Gigabit Ethernet (GE) switching subsystem performs the GE switching and packet switchingof the signaling and OM information in the BSC.

6.1 Physical Structure of the BSC GE Switching SubsystemThe BSC GE switching subsystem consists of the backplane of the subrack, GSCU, and inter-GSCU Ethernet cables.

6.2 Logical Structure of the BSC GE Switching SubsystemLogically, the BSC GE switching subsystem consists of the central processing unit, networkunit, and interface unit.

6.3 Features of BSC GE SwitchingThis describes the features of the BSC GE switching.

HUAWEI BSC6000 Base Station ControllerBSC Product Description 6 BSC GE Switching Subsystem


6-1

6.1 Physical Structure of the BSC GE Switching SubsystemThe BSC GE switching subsystem consists of the backplane of the subrack, GSCU, and inter-GSCU Ethernet cables.

Inter-Subrack GE InterconnectionsInter-subrack GE interconnections are classified into two types:

l GE interconnection between the GMPS and the GEPSThe GMPS serves as the main subrack, and a maximum of three GEPSs serve as extensionsubracks. The GMPS and the GEPSs are connected in the star topology through Ethernetcables between the GSCUs, as shown in Figure 6-1.

l GE interconnection between the GTCSsOne GTCS works as the main subrack, and a maximum of three GTCSs work as extensionsubracks. The GTCSs are connected in the star topology through the GSCUs, as shown inFigure 6-2.

Figure 6-1 GE interconnection between the GMPS and the GEPS

ExtensionGEPS

GMPS ExtensionGEPS

GSCU

GSCU

GSCU

GSCU

GSCU

GSCU

Active Standby Active Standby Active Standby

Figure 6-2 GE interconnection between the GTCSs

Extension GTCS

Main GTCS Extension GTCS

GSCU

GSCU

GSCU

GSCU

GSCU

GSCU

Active Standby Active Standby Active Standby

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Issue 02 (2008-10-20)

As shown in Figure 6-1 and Figure 6-2, the active and standby GSCUs in one subrack areconnected to the active and standby GSCUs in another subrack through crossover cables toachieve GE switching between subracks. The bandwidth of the GE switching between subracksis 4 Gbit/s.

When GTCSs are configured on the BSC side, the GSCU in the GMPS communicates with theGSCU in the main GTCS through the inter-GSCU Ethernet cables. When the GTCS is configuredon the MSC side, the GMPS communicates with the main GTCS over the Ater interface. In thiscase, the GE interconnection between the GMPS and the main GTCS is not established.

Intra-Subrack GE InterconnectionThe intra-subrack GE interconnection refers to the GE interconnection between the active andstandby GSCUs and the other boards in the same subrack, as shown in Figure 6-3.

Figure 6-3 Intra-subrack GE interconnection

Active GSCU

Service board 1

Standby GSCU

……

GMPS/GEPS/GTCS

Service board 2 Service board 24

As shown in Figure 6-3, in one subrack, the active and standby GSCUs and the other boardscommunicate with each other through the GE switching paths on the backplane. The bandwidthof each GE switching path within a subrack is 2 Gbit/s.

6.2 Logical Structure of the BSC GE Switching SubsystemLogically, the BSC GE switching subsystem consists of the central processing unit, networkunit, and interface unit.

Figure 6-4 shows the logical structure of the BSC GE switching subsystem.

HUAWEI BSC6000 Base Station ControllerBSC Product Description 6 BSC GE Switching Subsystem


6-3

Figure 6-4 Logical structure of the BSC GE switching subsystem

GEPS

Network unit

Interface unit

Central processing unit

GSCU

GMPS

GSCU

Main GTCS

GSCU

Interface unit Interface unit



Network unit Network unit

Central Processing UnitThe functions of the central processing unit are performed by the GSCU. The central processingunit performs the following management functions of the GE switching subsystem: initialization,configuration, maintenance, test, fault management, port trunking management, and switchovermanagement.

Network UnitThe functions of the network unit are performed by the GSCU. The network unit performs theMedia Access Control (MAC) address self-learning, address entry adding, address entrydeleting, GE line rate switching, L2 unicasting and broadcasting, and port trunking.

Interface UnitThe functions of the interface unit are performed by the GSCU. The interface unit receives andtransmits Ethernet packets.

6.3 Features of BSC GE SwitchingThis describes the features of the BSC GE switching.

The GE switching has the following features:

l The GSCU and other boards are interconnected in the star topology. In other words, thecommunication of any two boards should pass through the GSCU.

l The GSCU supports the centralized and non-blocking line-rate Layer 2 (L2) switching.

l The GSCU provides 60 GE ports, which support 60 Gbit/s line-rate switching.

l The ports on the GSCU support port trunking.

6 BSC GE Switching SubsystemHUAWEI BSC6000 Base Station Controller



Issue 02 (2008-10-20)

7 BSC Service Processing Subsystem

About This Chapter

The BSC service processing subsystem performs voice coding/decoding, rate matching, and PSservice processing.

7.1 Physical Structure of the BSC Service Processing SubsystemPhysically, the BSC service processing subsystem consists of the GDPUP and GDPUX.

7.2 Logical Structure of the BSC Service Processing SubsystemLogically, the BSC service processing subsystem consists of the CS service processingsubsystem and PS service processing subsystem. The functions of the CS service processingsubsystem are performed by the CS digital signal processing (DSP) module in the GDPUX. Thefunctions of the PS service processing subsystem are performed by the PS DSP module in theGDPUP.

HUAWEI BSC6000 Base Station ControllerBSC Product Description 7 BSC Service Processing Subsystem


7-1

7.1 Physical Structure of the BSC Service ProcessingSubsystem

Physically, the BSC service processing subsystem consists of the GDPUP and GDPUX.

The number of configured GDPUPs and the number of configured GDPUXs depend on thetraffic volume of CS services and PS services.l The GDPUX processes CS services. It is recommended that the GDPUX be configured in

slots 08-11 in the GMPS, in slots 00-03, 08-13, and 14-27 in the GEPS, and in slots 00-03and 08-13 in the GTCS. In different configuration modes of the BSC subracks, the GDPUXperforms different functions:– In BM/TC separated configuration mode, the GDPUX configured in the GMPS/GEPS

performs IP packet-TRAU conversion and forwarding; the GDPUX configured in theGTCS performs voice coding/decoding and rate matching.

– In BM/TC combined configuration mode, the GDPUX performs voice coding/decodingand rate matching. Meanwhile, if the HDLC transmission or IP transmission is used onthe Abis interface, the GDPUX also performs IP packet-TRAU conversion.

– In A over IP configuration mode, the GDPUX performs IP packet-TRAU conversionand forwarding.

l The GDPUP processes PS services. It is recommended that the GDPUP be configured inslots 08-11 in the GMPS and in slots 08-13 in the GEPS.

NOTE

When the HDLC transmission or IP transmission is used on the Abis interface, the external PCUcannot be used. In other words, the BSC must be configured with the GDPUP to process PS services.

Based on the configuration modes of the BSC subracks and different types of PCU, the BSCservice processing subsystem comprises different components:l In BM/TC separated configuration mode

– When the external PCU is used, the BSC service processing subsystem comprises theGDPUXs in the GTCS, as shown in Figure 7-1.

– When the built-in PCU is used, the BSC service processing subsystem comprises theGDPUXs and GDPUPs in the GMPS/GEPS, and the GDPUXs in the GTCS, as shownin Figure 7-2.

NOTE

In BM/TC separated configuration mode, the GMPS/GEPS is configured with the GDPUX only when theHDLC transmission or IP transmission is used over the Abis interface.

Figure 7-1 Physical structure of the BSC service processing subsystem (1)

GDPUX

GDPUX

GDPUX

GDPUX

GDPUX

GTCS

1300 01 02 03 07060504 08 09 10 1211

7 BSC Service Processing SubsystemHUAWEI BSC6000 Base Station Controller



Issue 02 (2008-10-20)


GEPS

1300 01 02 03 07060504 08 09 10 1211

GDPUX

GDPUX

GDPUX

GDPUP

GDPUP

GTCS

1300 01 02 03 07060504 08 09 10 1211

GDPUX

GDPUX

GDPUX

GDPUX

GDPUX

1300 01 02 03 07060504 08 09 10 1211

GDPUX

GDPUX

GDPUP

GMPS

l In BM/TC combined or A over IP configuration mode

– When the external PCU is used, the BSC service processing subsystem comprises theGDPUXs, which are configured in the GMPS/GEPS, as shown in Figure 7-3.

– When the built-in PCU is used, the BSC service processing subsystem comprises theGDPUP and GDPUX in the GMPS/GEPS, as shown in Figure 7-4.


GEPS

1300 01 02 03 07060504 08 09 10 1211

GDPUX

GDPUX

GDPUX

GEPS

1300 01 02 03 07060504 08 09 10 1211

GDPUX

GDPUX

GDPUX

1300 01 02 03 07060504 08 09 10 1211

GDPUX

GDPUX

GMPS



7-3


GEPS

1300 01 02 03 07060504 08 09 10 1211

GDPUX

GDPUX

GDPUX

GDPUX

GDPUP

GEPS

1300 01 02 03 07060504 08 09 10 1211

GDPUX

GDPUX

GDPUX

GDPUX

GDPUP

1300 01 02 03 07060504 08 09 10 1211

GDPUX

GDPUX

GDPUX

GMPS

GDPUP

GDPUP

GDPUP

NOTE

The GDPUX/GDPUP consists of 22 DSP modules. After being loaded with different software, the GDPUX/GDPUP performs different functions:

l Voice coding/decoding and rate matching

The voice coding/decoding and rate matching functions are performed by the GDPUX. In BM/TCseparated configuration mode, the GDPUX is configured in the GTCS. In BM/TC combinedconfiguration mode, the GDPUX is configured in the GMPS/GEPS.

l Voice frame format conversion

The voice frame format conversion function is performed by the GDPUX configured in the GMPS/GEPS.

l PS service processing

The PS service processing function is performed by the GDPUP, which is configured in the GMPS/GEPS.

At present, all the DSP modules in one GDPUX/GDPUP must be loaded with the same software. Therefore,they perform the same functions.

7.2 Logical Structure of the BSC Service ProcessingSubsystem

Logically, the BSC service processing subsystem consists of the CS service processingsubsystem and PS service processing subsystem. The functions of the CS service processingsubsystem are performed by the CS digital signal processing (DSP) module in the GDPUX. Thefunctions of the PS service processing subsystem are performed by the PS DSP module in theGDPUP.




Issue 02 (2008-10-20)

CS Service Processing SubsystemThe functions of the CS service processing subsystem are performed by the CS DSP module inthe GDPUX. Figure 7-5 shows the logical structure of the CS service processing subsystem.

Figure 7-5 Logical structure of the CS service processing subsystem

Covert data format

CS DSP moduleReorder/Eliminate jitter

Encode/Decode

CS service processing subsystem

Compress/Restore

Transmit and receive

data

TDMswitching

subsystem

GE switching subsystem

TRAUframe

PTRAUframe

RTPframe

PCMframe TDM

switching subsystem



data

The following takes the transmission of CS traffic signals from the BSC to the MGW as anexample. When IP transmission is used on both the Abis interface and the A interface, the CSDSP module processes traffic signals as follows:

1. The CS DSP module receives a PTRAU frame.2. The CS DSP module converts the PTRAU frame into the RTP frame. It also adjusts the

frame order and eliminates jitter.3. The RTP frame is switched to the GFGUA by the GSCU, and then is transmitted to the

MGW over the A interface.

PS Service Processing SubsystemThe functions of the PS service processing subsystem are performed by the PS DSP module inthe GDPUP. Figure 7-6 shows the logical structure of the PS service processing subsystem.

Figure 7-6 Logical structure of the PS service processing subsystem

Covert data format

PS DSP moduleReorder/Eliminate jitter

PS service processing subsystem


data

TDMswitching

subsystem


TRAUframe

PTRAUframe

FR/IP frame GE switching

subsystem


data

The following takes the transmission of PS signals from the BSC to the SGSN as an example.When IP transmission is used on the Abis interface and on the Gb interface, the serviceprocessing procedure of the PS DSP module is as follows:



7-5

1. The PS DSP module of the GDPUP receives a PTRAU frame.2. The PS DSP module adjusts the frame order and eliminates jitter. It then extracts the RLC/

MAC data blocks and encapsulates the data blocks into LLC PDUs.3. The LLC PDUs are encapsulated by the PS DSP module at the BSSGP/NS layer and then

switched to the GFGUG by the GSCU. Then, the LLC PDUs are transmitted to the SGSNover the Gb interface in the form of IP frames.




Issue 02 (2008-10-20)

8 BSC Service Control Subsystem

About This Chapter

The BSC service control subsystem performs the following functions: paging control, systeminformation management, channel assignment, BTS public service management, call control,packet service control, handover and power control, cell broadcast short message service, BTSOM, and TC resource pool management.

8.1 Physical Structure of the BSC Service Control SubsystemThis describes the components of the BSC service control subsystem.

8.2 Logical Structure of the BSC Service Control SubsystemThe BSC service control subsystem performs the following functions: paging control, messagemanagement, channel assignment, BTS public service management, call control, packet servicecontrol, handover and power control, cell broadcast short message service, and TC resource poolmanagement.

HUAWEI BSC6000 Base Station ControllerBSC Product Description 8 BSC Service Control Subsystem


8-1

8.1 Physical Structure of the BSC Service Control SubsystemThis describes the components of the BSC service control subsystem.

The components of the BSC service control subsystem are as follows:

l GXPUM and GXPUT configured in the GMPS/GEPS

l GBAM/GOMU

l GSCU configured in the GTCS

8.2 Logical Structure of the BSC Service Control SubsystemThe BSC service control subsystem performs the following functions: paging control, messagemanagement, channel assignment, BTS public service management, call control, packet servicecontrol, handover and power control, cell broadcast short message service, and TC resource poolmanagement.

Paging Control

The GXPUM/GXPUT performs the following paging control functions:

l Sends paging messages from the A and Pb/Gb interfaces to the BSC

l Sends the paging messages to the specified cells

System Information Management

The GXPUM performs the following system information management functions:

l Constructs various system information according to the GSM protocols and sends it to cells

l Initiates a procedure for sending CS or PS system information in the following situations:configuration of BSC data in online mode, change in the BTS management state, initiationof requests from the BTS, initiation of requests from the PCU, or restoration of the RSL

Channel Assignment

The GXPUM performs the following channel assignment functions:

l Assigns radio channels for CS services and PS services

l Performs dynamic conversion between CS channels and PS channels

BTS Public Service Management

The GXPUM performs the following BTS public service management functions: BTSconfiguration management and BTS state management.

l The BTS configuration management is responsible for the configuration and query of theBTS data. It performs the following functions: initial configuration, dynamic configuration,dynamic adjustment of channel types, and BTS initialization management. It also performsresetting, blocking, and unblocking of logical objects of a BTS.

8 BSC Service Control SubsystemHUAWEI BSC6000 Base Station Controller



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l The BTS state management is responsible for channel state synchronization, OMLtransmission state synchronization, TRX mutual aid, and BTS resource check.

Call ControlThe GXPUM/GXPUT performs the following CS call control functions: call establishment, callrelease, and call handover.

PS Service ControlThe GXPUM/GXPUT performs the following PS service control functions:

l Requests and releases a PDCH, checks PS service resources, controls and broadcasts PSsystem information

l Establishes PS transmission paths between the PCU and the BTS, and performs dynamicconversion between PDCHs and TCHs

Handover and Power ControlThe GXPUM/GXPUT performs the following handover and power control functions:l Initial processing of measurement reports

It includes the functions of interpolation, filtering, and prediction.l Cell sorting and handover decision

The cell sorting is classified into basic cell sorting and adjustment based on networkcharacteristics. The handover decision is classified into forced handover decision, directedretry decision, handover candidates query decision, emergency handover decision,common handover decision, and performance handover decision.

l Power ControlPower control functions are implemented through the signal level dual-threshold powercontrol algorithm, signal quality dual-threshold power control algorithm, power controlcompensation algorithm, and power control comprehensive decision algorithm.

Cell Broadcast Short Message ServiceThe GXPUM enables the cell broadcast short message service. The GXPUM processes the cellbroadcast short message service as follows:

l The GXPUM obtains cell information and sends it to the CBC.

l Upon reception of the broadcast request message from the CBC, the GXPUM saves andschedules the message, and then sends it to the BTS.

BTS Operation and MaintenanceThe operation and maintenance of the BTS is performed by the GBAM/GOMU. The specificoperations are BTS routine maintenance, BTS alarm management, BTS software management,and BTS test management.

TC Resource Pool ManagementThe TC resource pool of the BSC supports various types of services. For example, one TCresource pool can support Full Rate (FR) calls, Enhanced Full Rate (EFR) calls, Half Rate (HR)

HUAWEI BSC6000 Base Station ControllerBSC Product Description 8 BSC Service Control Subsystem


8-3

calls, and Adaptive Multi-Rate (AMR) calls. The TC resources used for the same type of service,however, are located in one resource pool.

In BM/TC separated configuration mode, the TC resource management is performed by theGSCU in the GTCS. In BM/TC combined or A over IP configuration mode, the TC resourcemanagement is performed by the GXPUM in the GMPS/GEPS. The TC resource managementinvolves the following aspects:

l Automatically detects faulty TC resources and allocates available TC resources for newcalls, thus improving system reliability.

l Allocates TC resources based on the CPU usage of DSP units so that the call congestionrate caused by faulty TC resources is reduced

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9 BSC Interface Processing Subsystem

About This Chapter

The BSC interface and signaling processing subsystem processes the signaling on the BSCinterfaces.

9.1 Physical Structure of the BSC Interface Processing SubsystemThe BSC interface processing subsystem consists of the interface boards and the GXPUM.

9.2 Logical Structure of the BSC Interface Processing SubsystemLogically, the BSC interface processing subsystem consists of the following units: Abis interfaceprocessing unit, A interface processing unit, Ater interface processing unit, Pb interfaceprocessing unit, Gb interface processing unit, and Cb interface processing unit.

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9-1

9.1 Physical Structure of the BSC Interface ProcessingSubsystem

The BSC interface processing subsystem consists of the interface boards and the GXPUM.

Figure 9-1 shows the physical structure of the BSC interface processing subsystem.

Figure 9-1 Physical structure of the BSC interface processing subsystem

GEPUG

GFGUG

GXPUM

BSC6000

To SGSNTo CBC Server

To PCU

To BTS To MSC/MGW

GOIUP

GEIUP

GOIUT

GEIUT

GOIUB

GEIUB

GFGUB

GOGUB

GEHUB

To BM/TC subrack

GOIUA

GEIUA

GFGUA

GOGUA

GEXUB

GOXUB

Table 9-1 shows the physical entities of the BSC interface processing subsystem.

Table 9-1 Physical entities of the BSC interface processing subsystem

Board Type Board Name

Abis interface boards l GEIUB: provides E1/T1 electrical ports

l GOIUB: provides the STM-1 optical port

l GFGUB: provides FE/GE electrical ports

l GOGUB: provides the GE optical ports

l GEHUB: provides E1/T1 electrical ports

l GEXUB: provides E1/T1 electrical ports

l GOXUB: provides STM-1 optical ports

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Board Type Board Name

A interface boards l GEIUA: provides E1/T1 electrical ports

l GOIUA: provides STM-1 optical port

l GFGUA: provides FE/GE electrical ports

l GOGUA: provides GE optical ports

Ater interface boards l GEIUT: provides E1/T1 electrical ports

l GOIUT: provides STM-1 optical port

Gb interface boards l GFGUG: provides FE/GE electrical ports

l GEPUG: provides E1/T1 electrical ports

Pb interface boards l GEIUP: provides E1/T1 electrical ports

l GOIUP: provides STM-1 optical port

Cb interface board GXPUM: provides FE electrical ports

9.2 Logical Structure of the BSC Interface ProcessingSubsystem

Logically, the BSC interface processing subsystem consists of the following units: Abis interfaceprocessing unit, A interface processing unit, Ater interface processing unit, Pb interfaceprocessing unit, Gb interface processing unit, and Cb interface processing unit.

Figure 9-2 shows the BSC interfaces.

Figure 9-2 BSC interfaces

PCU

BSC6000

GTCSAbis Ater

Pb Gb

ABTS MSC/MGW

SGSN

CBC

Cb

GMPS/GEPS

As shown in Figure 9-2, the BSC is connected to the MSC/MGW over the A interface, to theBTS over the Abis interface, to the PCU over the Pb interface, to the SGSN over the Gb interface,and to the CBC over the Cb interface. The GMPS/GEPS is connected to the GTCS over the Aterinterface.



9-3

NOTE

Based on the types of the PCU and the configuration modes of the BSC subracks, the BSC provides the followinginterfaces:

l When the built-in PCU is used, the BSC provides the Gb interface.

l When the external PCU is used, the BSC provides the Pb interface.

l In BM/TC separated configuration mode, the BM and the TC communicate with each other over the Aterinterface.

Abis Interface Processing UnitThe BSC and the BTS communicate with each other over the Abis interface. The Abis interfaceprocessing unit can be the GEIUB/GOIUB, GFGUB/GOGUB, GEHUB, or GEXUB/GOXUB.The Abis interface processing unit performs the following functions:

l Provides E1/T1 electrical ports, STM-1 optical ports, FE/GE electrical ports, and GE opticalports.

l Receives and transmits the signaling and traffic signals between the BSC and the BTS

l Converts internal protocols

l Processes HDLC and IP protocols

l Forwards signaling to the service control subsystem

l Forwards traffic signals to the service processing subsystem

A Interface Processing UnitThe BSC and the MSC/MGW communicate with each other over the A interface. The A interfaceprocessing unit can be the GEIUA/GOIUA or GFGUA/GOGUA. The A interface processingunit performs the following functions:l Provides E1/T1 electrical ports, STM-1 optical ports, FE/GE electrical ports, and GE optical

ports.l Receives and transmits signaling and traffic signals between the BSC and the MSC/MGW

l Converts internal protocols

l Performs the IP protocol processing if IP transmission is used over the A interface, andperforms the MTP2 protocol processing if the BM and the TC are configured in the samesubrack.

l Forwards the signaling from the core network to the GE switching subsystem

l Forwards the traffic signals from the core network to the GE switching subsystem or to theTDM switching subsystem

Ater Interface Processing UnitIn BM/TC separated configuration mode, the BM and the TC communicate with each other overthe Ater interface. The Ater interface processing unit can be the GEIUT/GOIUT. The Aterinterface processing unit performs the following functions:l Provides E1/T1 electrical ports and STM-1 optical ports

l Receives and transmits signaling and traffic signals between the BM subrack and the TCsubrack

l Processes HDLC and PPP protocols

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l Processes the MTP2 protocol

l Forwards signaling to the GE switching subsystem

l Forwards traffic signals to the TDM switching subsystem

Pb Interface Processing UnitWhen the external PCU is used, the BSC provides the Pb interface to enable the communicationbetween the BSC and the PCU. The Pb interface processing unit can be the GEIUP/GOIUP. ThePb interface processing unit performs the following functions:l Provides E1/T1 electrical ports and STM-1 optical ports

l Receives and transmits signaling and traffic signals between the BSC and the PCU


l Forwards traffic signals to the TDM switching subsystem

Gb Interface Processing UnitWhen the built-in PCU is used, the BSC provides the Gb interface to enable the communicationbetween the BSC and the SGSN. The Gb interface processing unit can be the GEPUG/GFGUG/GOGUG. The Gb interface processing unit performs the following functions:l Provides E1/T1 electrical ports, FE/GE electrical ports, and GE optical ports.

l Receives and transmits signaling and traffic signals between the BSC and the SGSN

l Processes the signaling according to the FR/IP protocol

l Forwards signaling and traffic signals to the GE switching subsystem

Cb Interface Processing UnitThe BSC and the CBC communicate with each other over the Cb interface. The Cb interfaceprocessing unit is the GXPUM. The Cb interface processing unit performs the followingfunctions:l Provides FE/GE electrical ports

l Receives and transmits the signaling between the BSC and the CBC




9-5

10 BSC Clock Subsystem

About This Chapter

The BSC clock subsystem consists of the GGCU and the clock processing unit in each subrack.The clock subsystem provides the working clock for the BSC and provides the reference clockfor the BTS.

10.1 BSC Clock SourcesThe BSC can use two clock sources: Building Integrated Timing Supply (BITS) clock and lineclock. Each clock source supports 1+1 backup.

10.2 BSC Clock SynchronizationThis describes the clock synchronization of the BSC subracks in different combination modes.

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10.1 BSC Clock SourcesThe BSC can use two clock sources: Building Integrated Timing Supply (BITS) clock and lineclock. Each clock source supports 1+1 backup.

BITS ClockThe BSC extracts the BITS clock signals from a BITS device. There are two types of BITS clocksignals: 2 MHz and 2 Mbit/s clock signals. BITS clock signals have two inputs: BITS0 andBITS1. The BSC extracts the BITS clock signals from the clock input ports on the GGCU panel.The clock signals serve as the reference clock for the GMPS/GEPS.

NOTE

l BITS0 and BITS1 correspond to the CLKIN0 and CLKIN1 ports on the GGCU panel respectively.

l The 2 Mbit/s clock source has a higher anti-interference capability than the 2 MHz clock source.

l When IP transmission is used over the A interface, the BSC can use only the BITS clock.

Line ClockLine clock is the 8 kHz clock extracted over the A interface by the GTCS. The line clock hastwo inputs: LINE0 and LINE1.

Based on the configuration modes of the BSC subracks, the BSC uses different methods to obtainthe line clock, which are described as follows:

l In BM/TC separated configuration mode, the GTCS extracts the line clock signals fromthe A interface. The GGCU extracts the line clock signals from the Ater interface, and thenprovides reference clock for the GMPS/GEPS.

l In BM/TC combined configuration mode, the GMPS extracts the line clock signals fromthe A interface. Then, the clock signals are transmitted to the GGCU through the backplane.

l In A over IP configuration mode, the BSC cannot use the line clock.

10.2 BSC Clock SynchronizationThis describes the clock synchronization of the BSC subracks in different combination modes.

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NOTE

If the built-in PCU is used and the Gb interface board is the GEPUG, the GEPUG traces the clock signalsin the SGSN and takes it as the reference clock. Thus, the GEPUG achieves synchronization with the SGSN.If the GEPUG uses the clock signals from the SGSN, ensure the following configurations:

l Each GEPUG must be configured with the SGSN clock.

l Each GEPUG should extract the clock signals from the SGSN that is connected to the GEPUG. Theclock signal of one GEPUG is independent from that of another GEPUG.

l If one GEPUG is connected to multiple SGSNs, the GEPUG can trace only one of the SGSN clocks.In addition, these SGSN must use the same clock source.

If the IP transmission is used on the Abis interface, the BSC cannot provide reference clock for the BTS.In this case, the BTS obtains the reference clock through one of the following ways:

l The BTS traces the clock of the transport network through an E1/T1 cable.

l The BTS traces the clock of the IP clock server through an Ethernet cable.

10.2.1 BSC Clock Synchronization (BM/TC Separated)This describes the clock synchronization in the GMPS/GEPS and GTCS in BM/TC separatedconfiguration mode.10.2.2 BSC Clock Synchronization (BM/TC Combined)This describes the clock synchronization in the GMPS/GEPS in BM/TC combined configurationmode.10.2.3 BSC Clock Synchronization (A over IP)This describes the clock synchronization in the GMPS/GEPS in A over IP configuration mode.

10.2.1 BSC Clock Synchronization (BM/TC Separated)This describes the clock synchronization in the GMPS/GEPS and GTCS in BM/TC separatedconfiguration mode.

Clock Synchronization in the GMPS/GEPSThe clock signals in the GMPS/GEPS are provided by the GGCU. The GGCU either extractsBITS clock signals from the BITS clock equipment or extracts line clock signals from the Aterinterface.

l Figure 10-1 shows the clock synchronization in the GMPS/GEPS when the GGCU extractsBITS clock signals from the BITS clock equipment.

l Figure 10-2 shows the clock synchronization in the GMPS/GEPS when the GGCU extractsline clock signals from the Ater interface.

Figure 10-1 Clock synchronization in the GMPS/GEPS (BITS clock source)

BITS clock

GMPS

GGCU

GSCU

Service board

GEPS

Service board

GSCU

Y-shaped clock cable Clock signal

BSC6000



10-3

Figure 10-2 Clock synchronization in the GMPS/GEPS (line clock source)

GMPS GEPS

GSCULine clock

BSC6000

GGCU

Clock signal

Service board

Service board

GEIUT

GSCU

Y-shaped clock cable

As shown in Figure 10-1 and Figure 10-2, the procedure for synchronizing clock signals in theGMPS/GEPS is as follows:

1. If the clock source is the BITS clock, the BITS clock signals are transmitted to the GGCUthrough the GGCU panel. If the clock source is the line clock, the line clock signals aretransmitted to the GEIUT/GOIUT in the GMPS over the Ater interface, and then transmittedto the GGCU through the backplane.

2. After a phase lock in the GGCU, the line clock signals change into 8 kHz clock signals.l In the GMPS, the 8 kHz clock signals are transmitted from the GGCU to the GSCU

through the backplane.l The 8 kHz clock signals are transmitted from the GGCU panel in the GMPS to the

GSCU in the GEPS through a Y-shaped clock cable.3. The GSCU in the GMPS/GEPS transmits the 8 kHz clock signals to the other boards in the

GMPS/GEPS through the backplane.

Clock Synchronization in the GTCSThe GTCS extracts line clock signals from the A interface. Figure 10-3 shows the clocksynchronization in the GTCS.

Figure 10-3 Clock synchronization in the GTCS

MSC

E1/T1 cable Clock signal

A

GTCS

Service board

GSCU

GEIUA

BSC6000




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The clock signals in the GTCS are processed in the following manner:

1. The GTCS extracts line clock signals from the A interface. The line clock signals areprocessed by the GEIUA/GOIUA. Then, 8 kHz clock signals are generated.

2. The backplane in the GTCS transmits the 8 kHz clock signals to the GSCU in the GTCS.Then, the GSCU transmits the 8 kHz clock signals to the other boards in the GTCS.

3. The GEIUT/GOIUT in the main GTCS extracts the 8 kHz clock signals from the backplane,and then transmits the clock signals to the GMPS over the Ater interface.

10.2.2 BSC Clock Synchronization (BM/TC Combined)This describes the clock synchronization in the GMPS/GEPS in BM/TC combined configurationmode.

Clock Synchronization in the GMPS/GEPS (BITS Clock Source)Figure 10-4 shows the clock synchronization in the GMPS/GEPS that uses the BITS clocksource.

Figure 10-4 BSC clock synchronization procedure (BITS clock source)

GMPS

GGCU

GSCU

Service board

GEPS

Service board

GSCU


BITS clock

BSC6000

The clock signals in the GMPS/GEPS are processed in the following manner:

1. The BITS clock signals are transmitted to the GGCU through the GGCU panel.2. After a phase lock in the GGCU, the BITS clock signals change into 8 kHz clock signals.

l In the GMPS, the 8 kHz clock signals are transmitted from the GGCU to the GSCUthrough the backplane.

l The 8 kHz clock signals are transmitted from the GGCU panel in the GMPS to theGSCU in the GEPS through a Y-shaped clock cable.

3. The GSCU in the GMPS/GEPS transmits the 8 kHz clock signals to the other boards in theGMPS/GEPS through the backplane.

Clock Synchronization in the GMPS/GEPS (Line Clock Source)Figure 10-5 shows the clock synchronization in the GMPS/GEPS that uses the line clock source.



10-5

Figure 10-5 BSC clock synchronization procedure (line clock source)

Line clock


GMPS

G EIUA

GSCU

GGCU

MSC

GEPS

G SCU

E1/T1 cable

BSC6000

Service board

Service board


1. The GMPS extracts line clock signals over the A interface. The line clock signals areprocessed by the GEIUA/GOIUA and then are converted into 8 kHz clock signals.

2. In the GMPS, the 8 kHz clock signals are transmitted to the GGCU through the backplane.After a phase lock in the GGCU, the 8 kHz clock signals are transmitted to the other boardsin the GMPS through the GSCU.

3. The 8 kHz clock signals are transmitted from the GGCU in the GMPS to the GSCU in eachGEPS. Then, the GSCU in each GEPS forwards the clock signals to the other boards in theGEPS.

10.2.3 BSC Clock Synchronization (A over IP)This describes the clock synchronization in the GMPS/GEPS in A over IP configuration mode.

In A over IP configuration mode, the BSC cannot use the line clock. Figure 10-6 shows theclock synchronization in the GMPS/GEPS that uses the BITS clock source.

Figure 10-6 BSC clock synchronization procedure (BITS clock source)

GMPS

GGCU

GSCU

Service board

GEPS

Service board

GSCU


BITS clock

BSC6000





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1. The BITS clock signals are transmitted to the GGCU through the GGCU panel.2. After a phase lock in the GGCU, the BITS clock signals change into the 8 kHz clock signals.

l In the GMPS, the 8 kHz clock signals are transmitted from the GGCU to the GSCUthrough the backplane.

l The 8 kHz clock signals are transmitted from the GGCU panel in the GMPS to theGSCU in the GEPS through a Y-shaped clock cable.

3. The GSCU in the GMPS/GEPS transmits the 8 kHz clock signals to the other boards in theGMPS/GEPS through the backplane.



10-7

11 BSC Power Subsystem

The BSC power subsystem adopts dual-circuit redundancy and point-by-point monitoringsolution, which is highly reliable. The BSC power subsystem comprises the power lead-in partand the power distribution part.

Power Lead-In PartThe power lead-in part leads the power from the DC power distribution cabinet to the powerdistribution boxes of the BSC cabinet. The power lead-in part consists of the DC powerdistribution cabinet, power distribution box, and cables between them. At present, the BSCsupports two types of power distribution box: common power distribution box and high-powerdistribution box. Figure 11-1 and Figure 11-2 show the power lead-in parts of the two types ofpower distribution box.

Figure 11-1 Power lead-in part (common power distribution box)

To DCpowerdistributionpanel

NOTE

The DC power distribution cabinet and the upstream DC power distribution panel are not regarded as theBSC equipment.

HUAWEI BSC6000 Base Station ControllerBSC Product Description 11 BSC Power Subsystem


11-1

Figure 11-2 Power lead-in part (high-power distribution box)

The working principle of the power lead-in part is as follows:

l The DC power distribution cabinet provides each BSC cabinet with two separate -48 Vinputs, one route for RTN connection, and one route for PGND connection.

l Typically, the two routes of power inputs work concurrently. If one route fails, the otherroute supplies power alone to ensure the stable running of the system. You can repair onefaulty route of the two routes when the power is normally supplied, keeping the reliabilityand availability of the power subsystem at an optimum level.

Power Distribution Part

The power distribution part distributes power from the power distribution box to various partsin the cabinet. It comprises the power distribution box, power distribution switches, and variousparts in the cabinet.

The working principle of the power distribution part is as follows:

l The power distribution box provides lightning protection and overcurrent protection forthe –48 V inputs. It then supplies two groups of power to the parts in the BSC. The cabinetoperates in the power range -40 V to -57 V.

l The power distribution box monitors each route of power in real time. Upon detection ofabnormal power supply, the power distribution box reports relevant alarms to the LMT.

l The power distribution differs within different types of cabinets.

– For details on the power distribution in the GBCR, refer to Connections of Power Cablesand PGND Cables in the GBCR (Configuration Type A) and Connections of PowerCables and PGND Cables in the GBCR (Configuration Type B).

– For details on the power distribution in the GBSR, refer to Connections of Power Cablesand PGND Cables in the GBSR.

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12 BSC Environment MonitoringSubsystem

About This Chapter

The BSC environment monitoring subsystem comprises the power distribution box and theenvironment monitoring parts in each subrack. The environment monitoring subsystem monitorsand adjusts the power supply, the speed of the fans, and the working environment.

12.1 BSC Power MonitoringThe BSC power monitoring involves monitoring the power supply of each BSC subrack in realtime, reporting the operating status of the power supply, and generating alarms in the case ofexceptions.

12.2 BSC Fan MonitoringThe BSC fan monitoring involves monitoring the operating status of the fans in real time andadjusting the speed of the fans based on the temperature in the subrack.

12.3 BSC Environment MonitoringThe BSC environment monitoring involves monitoring the temperature, humidity, and operatingvoltage of the BSC that is configured with the EMU. When exceptions occur, the EMU reportsenvironment alarms to the LMT or M2000. Each cabinet can be configured with a maximum ofone EMU.

HUAWEI BSC6000 Base Station ControllerBSC Product Description 12 BSC Environment Monitoring Subsystem


12-1

12.1 BSC Power MonitoringThe BSC power monitoring involves monitoring the power supply of each BSC subrack in realtime, reporting the operating status of the power supply, and generating alarms in the case ofexceptions.

Figure 12-1 shows the principle of power monitoring.

Figure 12-1 Principle of power monitoring

Power distribution box

GMPS

Communication board formonitoring power distribution

GSCU GBAM/GOMU

The power monitoring process is as follows:

1. The monitoring board in the power distribution box monitors the operating status of thepower distribution box. The RS485 serial cable routes the monitoring signals to the subrackthat is connected with the serial cable.

2. The monitoring signals are sent to the GSCU in the subrack through the serial bus on thebackplane.

3. The GSCU processes and reports the monitoring information. When an exception occurs,the GSCU generates an alarm and sends alarm information to the GBAM/GOMU. TheGBAM/GOMU then sends the alarm information to the LMT and M2000.

12.2 BSC Fan MonitoringThe BSC fan monitoring involves monitoring the operating status of the fans in real time andadjusting the speed of the fans based on the temperature in the subrack.

The BSC uses the all-in-one design to integrate the fan box into the subrack. Figure 12-2 showsthe principle of fan monitoring.

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Figure 12-2 Principle of fan monitoring

Subrack

Fan control unit

GSCU GBAM/GOMU

Fan box

The fan monitoring process is as follows:

1. The fan control unit monitors the operating status of the fans in the fan box. The RS485serial cable leads the monitoring signals to the subrack.

2. The monitoring signals are sent to the GSCU in the subrack through the serial bus on thebackplane.

3. The GSCU processes and reports the monitoring information. When an exception occurs,the GSCU generates an alarm and sends alarm information to the GBAM/GOMU. TheGBAM/GOMU then sends the alarm information to the LMT and M2000.

12.3 BSC Environment MonitoringThe BSC environment monitoring involves monitoring the temperature, humidity, and operatingvoltage of the BSC that is configured with the EMU. When exceptions occur, the EMU reportsenvironment alarms to the LMT or M2000. Each cabinet can be configured with a maximum ofone EMU.

Figure 12-3 shows the principle of environment monitoring.

Figure 12-3 Principle of environment monitoring

GBAM/GOMU

EMU

Other subrack

GSCU

GMPS

GSCU

HUAWEI BSC6000 Base Station ControllerBSC Product Description 12 BSC Environment Monitoring Subsystem


12-3

The environment monitoring process is as follows:

1. The sensors monitor the environment and send the monitoring signals to the EMU.2. The EMU sends the monitoring signals to the connected subrack.3. The monitoring signals are sent to the GSCU in the subrack through the serial bus on the

backplane.l If the subrack is an extension GTCS, the monitoring signals are sent from the GSCU in

the extension GTCS to the GSCU in the GMPS through the GSCU in the main GTCS.l If the subrack is a GEPS or the main GTCS, the monitoring signals are sent to the GSCU

in the GMPS.4. The GSCU in the GMPS processes the monitoring signals and reports the monitoring

information. When an exception occurs, the GSCU generates an alarm and sends the alarminformation to the GBAM/GOMU. The GBAM/GOMU then sends the alarm informationto the LMT or M2000.

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13 OM of the BSC

About This Chapter

This describes two OM modes and various OM functions of the BSC.

13.1 OM Modes of the BSCThe BSC can be maintained through either the LMT or the iManager M2000.

13.2 OM Functions of the BSCThe OM functions of the BSC are as follows: security management, configuration management,performance management, alarm management, and loading management.

HUAWEI BSC6000 Base Station ControllerBSC Product Description 13 OM of the BSC


13-1

13.1 OM Modes of the BSCThe BSC can be maintained through either the LMT or the iManager M2000.

The OM modes of the BSC are as follows:

l LMTYou can maintain the BSC on the LMT, which communicates with the BSC through a LANswitch or through remote dialing.

l iManager M2000You can maintain the BSC on the iManager M2000. The BSC serves as a network elementto access the iManager M2000.

Figure 13-1 shows the network topology of the BSC OM (in BSC hardware configurationtype A).

Figure 13-2 shows the network topology of the BSC OM (in BSC hardware configurationtype B).

Figure 13-1 Network topology of the BSC OM (in BSC hardware configuration type A)

Host GBAM

LMT

iManager M2000

LMT

BSC6000

Alarm box

VLAN

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Figure 13-2 Network topology of the BSC OM (in BSC hardware configuration type B)

LMT

iManager M2000

LMT

BSC6000

Alarm box

VLAN

13.2 OM Functions of the BSCThe OM functions of the BSC are as follows: security management, configuration management,performance management, alarm management, and loading management.

13.2.1 BSC Security ManagementThe BSC security management involves authority management, log management, and inventorymanagement.

13.2.2 BSC Configuration ManagementThe BSC configuration management involves managing the data configurations of the BSC andof the related BTSs.

13.2.3 BSC Performance ManagementThe BSC performance management involves collecting, analyzing, and querying performancedata.

13.2.4 BSC Alarm ManagementThe BSC alarm management involves monitoring the operating status of the BSC and reportingalarm information in real time. Therefore, you can take appropriate measures in time.

13.2.5 BSC Loading ManagementThe BSC loading management involves managing the process of loading programs or data filesto boards after the BSC subracks are started or restarted.

13.2.6 BSC Upgrade ManagementThe BSC can be upgraded to a later version. The BSC upgrade management involves themanagement of the procedures for upgrading the OMU software, LMT software, and patchsoftware. The BSC supports two upgrade modes: remote upgrade and local upgrade.



13-3

13.2.7 BTS Loading ManagementThe BTS loading management involves managing the process of loading software to the boardsin the BTS.

13.2.8 BTS Upgrade ManagementThe BTS can be upgraded a later version. You can locally or remotely upgrade multiple BTSson the LMT/M2000 through the BSS OM network.

13.2.1 BSC Security ManagementThe BSC security management involves authority management, log management, and inventorymanagement.

Authority ManagementThe BSC authority management regulates the operation authority of the users (LMT users oriManager M2000 users) that log in to the BSC. When users log in to the BSC, they actually login to the GBAM/GOMU of the BSC. The BSC users are classified into the following types:l Domain users: These user accounts are created, changed, authenticated, and authorized on

the M2000. Domain users can manage the BSC after logging in to the BSC on the LMT(BSC Local Maintenance Terminal or MML client) or after logging in to the M2000 serverthrough the M2000 client.

l Internal users: There are two default accounts: admin and guest. The admin account hasthe rights to perform all the operations, and the guest account has only the data query rights.You cannot modify or delete these two accounts.

l External users: The external users are created, modified, authenticated, and authorized bythe super-user admin or by external users who have corresponding rights. External usersare classified into five levels. The users belonging to different levels are functional grouped.The users can perform only the operations defined in their functional groups. The GBAM/GOMU verifies and controls the operation authority of the external users. Table 13-1defines the authority of the external users that belong to different functional groups.

Table 13-1 Definitions of the BSC user authorities

Level Authority

Guest Guest can only browse data.

User In addition to the authority granted to the User, User can perform OMof the equipment, alarm management, and performance management.

Operator In addition to the authorities granted to the User, Operator can performdata configuration for the equipment.

Administrator Administrator has the highest operation authority. It can manage otherusers.

Custom The authority of this user is defined by the Administrator.

Security management also includes NE operation time management. It limits the operation timeof users by date, week, and time segment. Users can carry out operations only in the predefinedtime limit.




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Log Management

Log management records and saves the operations performed by an operator and the runninginformation of the BSC. It also helps in analyzing and locating faults.

Table 13-2 lists the logs that are recorded when the BSC is running.

Table 13-2 BSC logs

Type Description

Running log Records the operating information about the system, such as boardreset information

Operating log Records the information on operation and maintenance performed byusers

Debugging log Records the information on the analysis and location of internal faults

LastWords log Records the primary information such as timers before system failure.The information is used to locate and analyze faults, such as abnormalsystem restart.

CS CHR log Records the information on CS calls and saves it on a server. Thisenables you to quickly locate faults and view history CS call records.

PS CHR log Records the information on PS calls and saves it on a server. Thisenables you to quickly locate faults and view history PS call records.

BTS log Records the information on the faults that occur while the BTS isrunning and the related debugging information

Frequency scan log Records the information on cell frequency scan

TRX power log Records the information on the TRX power

Equipment roomtemperature log

Records the information on the temperature in the equipment room

The BSC log management involves the following functions:

l Querying log files

You can view specified log information in the GBAM/GOMU by setting the queryingconditions.

l Uploading log files

You can upload the log files in the GBAM/GOMU to a specified FTP server by setting theuploading parameters.

l Saving log files

You can save specified running, operating, debugging logs in the GBAM/GOMU by settingthe parameters of the log files.

l Saving the logs stored in the buffer to the log file by force

You can obtain the latest log information by saving the logs stored in the buffer to the logfile.



13-5

NOTE

The GBAM/GOMU saves the log information in the buffer. When the log information reaches thespecified limit or the current time reaches the log record period, the GBAM/GOMU records the logfile.

Inventory ManagementInventory management is a process in which the BSC and BTS inventory information files areexported and uploaded. Using this function, you can learn the physical and logical configurationsof the BSC and BTS through the LMT and M2000. Both the BSC inventory information and theBTS inventory information contain the descriptions of the following items:

l Equipment

l Connection

l Modules

l Configurations

l Peer equipment

l Host version

l Cabinets

l Subracks

l Boards and the Flash electronic labels of the boards

l Slots

l Ports

l Antennas

13.2.2 BSC Configuration ManagementThe BSC configuration management involves managing the data configurations of the BSC andof the related BTSs.

13.2.2.1 BSC Data Configuration ModesThe BSC data configuration is performed on the LMT (BSC6000 Local Maintenance Terminalor MML client). Two data configuration modes can be used: offline data configuration and onlinedata configuration.

13.2.2.2 BSC Configuration Data TypesBased on the system requirements and the location for saving the data, the BSC configurationdata is classified into different types.

13.2.2.3 BSC Data CheckThe BSC data check consists of the data validity check and data consistency check.

13.2.2.4 BSC Data SynchronizationThe BSC data synchronization is the process in which the data on each board is synchronizedwith the data in the GBAM/GOMU database.




Issue 02 (2008-10-20)

BSC Data Configuration Modes

The BSC data configuration is performed on the LMT (BSC6000 Local Maintenance Terminalor MML client). Two data configuration modes can be used: offline data configuration and onlinedata configuration.

Offline Data Configuration

Offline data configuration is performed when the communication between the LMT and theGBAM/GOMU is not established.

Offline data configuration does not occupy the network bandwidth and it is easy and fast tooperate; thus, it applies to initial network operation and network upgrade.

Figure 13-3 shows the principle of the offline data configuration on the BSC6000 LocalMaintenance Terminal.

Figure 13-3 Principle of the offline data configuration

LMT (*.dat)

Load and restorecommands Configuration

module

GBAM/GOMU

Database

Board

The procedure for the offline data configuration on the BSC6000 Local Maintenance Terminalis as follows:

1. Perform data configuration on the BSC6000 Local Maintenance Terminal, and check thatthe data is integral and accurate by using the auto check function of the LMT.

2. Save the configuration data as a *.dat file on the hard disk.

3. Send the *.dat file to the GBAM/GOMU database by performing the Load and Restoreoperation on the LMT. Then, activate the configuration data of each service board.

NOTE

At present, the MML client does not support offline data configuration.

Online Data Configuration

Online data configuration is performed when the communications between the GBAM/GOMUand the relevant BSC boards are established. On the LMT, you can modify the data configurationof the BSC and the related BTSs. In online data configuration, the configured data takes effectimmediately.

Figure 13-4 shows the principle of the online data configuration.



13-7

Figure 13-4 Principle of the online data configuration

LMT

Configurationcommands

Board

ConfigurationdataConfiguration

module

GBAM/GOMU

Database

The procedure of the online data configuration in the BSC6000 Local Maintenance Terminal isas follows:

1. You can issue configuration commands to the configuration module of the GBAM/GOMUthrough the LMT.

2. On receiving the configuration commands, the configuration module sends theconfiguration data to the database of a specified service board and writes the configurationdata in the database of the GBAM/GOMU.

After you log in to the BSC through the BSC6000 Local Maintenance Terminal and performdata configurations, other users are forbidden to perform data configurations simultaneously. Incase that multiple LMTs have accessed the GBAM/GOMU and one LMT has performed dataconfiguration, the rest LMTs will detect the data changed in the GBAM/GOMU and prompt youto update the local data to keep the consistency of the data between the LMTs and the GBAM/GOMU.

After you log in to the BSC through the MML client and run configuration commands insuccession, other users are allowed to perform data configurations simultaneously. After youlog in to the BSC through the MML client and run configuration commands in batch, other usersare forbidden to perform data configurations simultaneously.

BSC Configuration Data Types

Based on the system requirements and the location for saving the data, the BSC configurationdata is classified into different types.

The BSC configuration data is classified into LMT configuration data, GBAM configurationdata, and GOMU configuration data in terms of the data location.

l LMT configuration data

In offline configuration mode, you can configure the BSC data by using the dataconfiguration wizards, and then save the configuration data in the LMT memory. You cansave the configuration data by backing up the local data.

l Based on the hardware configuration types, the BSC configuration data is classified intothe GBAM configuration data and GOMU configuration data.

– GBAM configuration data: The data, saved in the GBAM memory database and on theGBAM hard disk, provides the basis for the operation of the GBAM. After dynamic




Issue 02 (2008-10-20)

configuration, the GBAM updates the data in the memory database and the data fileson the hard disk.

– GOMU configuration data: The data, saved in the database of the GOMU memory,provides the basis for the operation of the GOMU. After dynamic configuration, theGOMU updates the data in the GOMU memory database.

Based on system requirements, the BSC configuration data is classified into the minimumconfiguration data and the dynamic configuration data.

l Minimum configuration dataThe minimum configuration data is provided by the system automatically and is saved inthe directory \LMT installation directory\BSC6000\software version\Cfg\SysData. Theconfigured data is the minimum configuration data for the normal operation of the LMT inoffline mode. The minimum configuration data of the GBAM and GOMU ismini_Cfg_lmt12.DAT and mini_Cfg_lmt0.DAT respectively.

l Dynamic configuration dataThe dynamic configuration data is generated on the GBAM/GOMU when you performconfigurations on the LMT in online mode.

NOTE

The files in the directory \LMT installation directory\BSC6000\software version\Cfg\SysData aremandatory for the normal operation of the LMT. The files cannot be modified or deleted.

BSC Data CheckThe BSC data check consists of the data validity check and data consistency check.

BSC Data Validity CheckThe BSC data validity check function is used to check whether configuration commands complywith the configuration rules and the related syntactic rules.

The BSC data validity check is performed on the basis of the following aspects: whether aconfiguration complies with the configuration rules and whether an MML script file complieswith the syntactic rules. When a configuration is performed or an MML command is run, theBSC performs data validity check. If the check result shows that the configuration is incorrector the MML command does not run properly, the BSC terminates the configuration or the runningof the command. At the same time, a warning message is displayed.

BSC Data Consistency CheckThe BSC data consistency check consists of the following aspects:

l Check of the data consistency between the active and standby GOMUsIf the BSC is configured with the active and standby GOMUs, the data on the active GOMUmust be the same as that on the standby GOMU, thus ensuring the reliability of the BSC.If the active GOMU is faulty, the standby GOMU takes over the work of the active GOMUafter an active/standby switchover.

l Check of the data consistency between the GBAM/GOMU and the other boardsIf the data on a service board is inconsistent with that on the GBAM/GOMU, the systemcannot run stably. In addition, some data configured on the LMT cannot take effect on thehost. Figure 13-5 shows the procedure of the BSC data consistency check.



13-9

Figure 13-5 Procedure of the BSC data consistency check

LMT

Data consistencycheck command

Result file of dataconsistency

check

GBAM/GOMU

Database

Other boards

Database

The procedure of the BSC data consistency check is as follows:

1. You can issue a data consistency check command to the GBAM/GOMU on the LMT.2. The GBAM/GOMU analyzes the parameters of the command and checks whether the data

in the board database is consistent with that in the GBAM/GOMU database.3. When the comparison is complete, the GBAM/GOMU generates a result file and sends it

to the LMT.

BSC Data SynchronizationThe BSC data synchronization is the process in which the data on each board is synchronizedwith the data in the GBAM/GOMU database.

If a data consistency check finds that the data is inconsistent, you can perform synchronizationoperations on the LMT to ensure the data consistency. The data on each board should beconsistent with the data in the GBAM/GOMU database; the data on the standby GOMU shouldbe consistent with the data on the active GOMU. Figure 13-6 shows the BSC datasynchronization procedure.

Figure 13-6 BSC data synchronization procedure

LMT

Synchronizationcommand

Data files

GBAM/GOMU

Database

Board

Database




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The BSC data synchronization procedure is as follows:

1. You can issue a synchronization command to the GBAM/GOMU on the LMT.2. The GBAM/GOMU analyzes the parameters of the command and synchronizes the data

on each board with the data in the GBAM/GOMU database.3. Once the update is complete, the GBAM/GOMU sends the synchronization result to the

LMT.

13.2.3 BSC Performance ManagementThe BSC performance management involves collecting, analyzing, and querying performancedata.

The performance measurement results generated within the latest 15 days will be stored by theBSC and those beyond the latest 15 days will be deleted.

Figure 13-7 illustrates the BSC performance management process.

Figure 13-7 BSC performance management process

M2000 server

M2000 client

Performancemeasurement

module

GBAM/GOMU

Measurementresult file

Collected data

Service board

By default, the BSC performance management process is as follows:

1. You can register a measurement task and specify the object, time, and item attributes ofthe task on the iManager M2000 client.

2. Based on the measurement task, the iManager M2000 server modifies the measurementtask file, sends it to the GBAM/GOMU, and issues a command to activate the modifiedmeasurement task file.

3. Based on the modified measurement task file, the GBAM/GOMU notifies service boardsto collect data based on the new requirements. The GBAM/GOMU receives themeasurement results from the service boards and saves them as files.

4. The GBAM/GOMU notifies the iManager M2000 server of the measurement results anduploads the files to the iManager M2000 server. The iManager M2000 server processes thefiles and saves them to the database.

5. Based on the measurement task registered by the M2000 client, the iManager M2000 serverextracts the relevant results from the database, calculates them, and sends them to theM2000 client.



13-11

13.2.4 BSC Alarm ManagementThe BSC alarm management involves monitoring the operating status of the BSC and reportingalarm information in real time. Therefore, you can take appropriate measures in time.

BSC Alarm ManagementThe BSC alarm management has the following functions:

l Alarm filteringThe BSC can filter the repetitive fault alarms, recovery alarms, and event alarms.

l Alarm shieldingOperators can shield an alarm by alarm ID. Alternatively, they can shield a specific alarmor all alarms of a cell, BTS, or board by setting alarm shielding conditions, thus reducingthe number of reported derivative alarms.

l Alarm alertWhen a fault alarm occurs, the BSC can notify the operators by Email, icon flash, phone,short message, terminal sound, audible and visual indication of alarm box.

l Alarm information processingYou can browse alarm information in real time, query history alarm information, and handlealarms based on the handling suggestions available from the online help of the BSC. TheBSC can store 100, 000 pieces of history alarm information generated in the latest 90 days.

BSC Alarm Management MechanismThe alarm management process consists of alarm generation, alarm reporting, and alarmhandling. Figure 13-8 shows the alarm management process of the BSC.

Figure 13-8 Alarm management process of the BSC

LMT client

M2000 server

M2000 client

Alarmmanagement

module

Alarmmanagementfunction set

GBAM/GOMU Board

Database

Each board detects and reports alarms to the GBAM/GOMU automatically. The GBAM/GOMUclassifies these alarms into different levels and sends them to the LMT or to the M2000 server.You can manage the alarms using the LMT or the M2000 client.

The alarm management module of the GBAM/GOMU performs the following functions:




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l Alarm storageThe alarm management module of the GBAM/GOMU stores the alarms reported by eachboard in the GBAM/GOMU alarm database.

l Alarm processingThe alarm management module of the GBAM processes the operation commands from theLMT or M2000 client. There commands include querying active alarms, querying alarmlogs, and modifying alarm configuration items.

Driving of the Alarm BoxThe alarm box generates audible and visual alarms. The red, orange, yellow, and green alarmindicators on the alarm box corresponds to the critical, major, minor, and warning alarms.Different alarm severity levels have different alarm sounds. Figure 13-9 shows the workingprinciple of the alarm box that is connected to the LMT.

Figure 13-9 Working principle of the alarm box

Alarmmanagement

module

GBAM/GOMU

Alarm box

Convert

LMT

The alarm box is connected to the LMT or GBAM/GOMU/M2000 through the serial port. Whenan alarm is reported, the alarm forward management module in the LMT instructs the alarm boxto generate an audible and visual alarm. You can stop alarm sounds, disable alarm indicators,and reset the alarm box through the LMT.

NOTE

One LMT can be connected to only one alarm box.

13.2.5 BSC Loading ManagementThe BSC loading management involves managing the process of loading programs or data filesto boards after the BSC subracks are started or restarted.

BSC Loading SystemThe GBAM/GOMU, the GSCU in the GMPS, and the GSCU in the main GTCS play importantroles during the BSC loading process.

l The GBAM/GOMU serves as the center of the entire BSC loading management process.The loading and power-on of the GBAM/GOMU are independent of other boards. TheGBAM/GOMU processes the loading control requests of the GSCU in the GMPS.

l The GSCU in the GMPS serves as the subcenter of the BSC loading management process.It processes the loading control requests of the service boards in the GMPS and GEPS. Ifthe OM link between the GMPS and the main GTCS is normal, the GSCU in the GMPSprocesses all the loading control requests from the service boards in all the GTCSs.



13-13

l The GSCU in the main GTCS serves as the subcenter of the GTCS loading managementprocess. If the OM link between the GMPS and the main GTCS is disconnected, the GSCUin the main GTCS processes all the loading control requests from the service boards in allthe GTCSs.

BSC Loading ProcessThe BSC loading process varies with the combination modes of BSC subracks and with thelocation of the GTCS.l In BM/TC separated configuration mode, the GTCS is configured on the BSC side. For the

BSC loading process in this case, see Figure 13-10.l In BM/TC separated configuration mode, the GTCS is configured on the MSC side, and

the OM link on the Ater interface serves as the loading path. For the BSC loading processin this case, see Figure 13-11.

l Figure 13-12 shows the BSC loading process in BM/TC combined or A over IPconfiguration mode.

Figure 13-10 BSC loading process (1)

Main GTCSExtension GTCS

GSCU

GBAM/GOMU

Loadingmodule

Loadingcontrol

Filetransmission

GMPS

GEPS

GSCU

GSCU

GSCU

Otherboards

Otherboards

Otherboards

Otherboards

Programfiles/data

files




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GBAM/GOMU

Programfiles/data

files

Loadingmodule

Loadingcontrol

Filetransmission

GMPS

GSCU

GEPS

GSCU

Main GTCS

GSCU

Extension GTCS

GSCU

GEIUT

GEIUT

BSC side

MSC side

Otherboards

Otherboards

Otherboards

Otherboards


GBAM/GOMU

Loadingmodule

Loadingcontrol

Filetransmission

GMPS

GEPS

GSCU

GSCU

Otherboards

Otherboards

Programfiles/data

files

Assume that in BM/TC separated configuration mode, the GTCS is configured on the BSC side,as shown in Figure 13-10. In this case, the BSC loading process is described as follows:



13-15

1. After the GSCU in the GMPS is started, it broadcasts the BOOTP request to the GBAM/GOMU.l If the GBAM/GOMU is communicating with the LMT, it processes the request.

l If the GBAM/GOMU is not started or does not communicate with the LMT, the GSCUin the GMPS loads program files from the Flash.

2. After receiving the BOOTP request, the GBAM/GOMU writes the Load Key, IP address,and version information into the BOOTP acknowledge message, which is then transmittedto the GSCU.

3. On receiving the BOOTP acknowledgement message, the GSCU in the GMPS loads theprogram files and data files according to the Load Key.

4. The GSCU in the GMPS forwards the BOOTP requests from other boards in the GEPS orGTCS to the GBAM/GOMU.

5. After receiving the BOOTP requests, the GBAM/GOMU sends acknowledgment messagesto the other boards.

6. On receiving the acknowledgement messages, the other boards load the program files anddata files according to the Load Keys.

7. The BSC loading process is complete.

13.2.6 BSC Upgrade ManagementThe BSC can be upgraded to a later version. The BSC upgrade management involves themanagement of the procedures for upgrading the OMU software, LMT software, and patchsoftware. The BSC supports two upgrade modes: remote upgrade and local upgrade.

The BSC upgrade process is as follows:

1. Backing up the data configuration fileBack up the data configuration file on the LMT before upgrade.

2. Upgrading the LMT software of the BSCInstall the latest LMT software.

3. Upgrading the OMU software on the GBAM/GOMUUninstall the running OMU software, install the latest OMU software, and then start theOMU software.

4. Restoring dataOn the LMT, load the data configuration file that is backed up before upgrade.

5. Upgrading the board softwareLoad software to the boards in the GMPS, GEPS, and GTCS. The operation order is asfollows: GMPS, GTCS that matches the GMPS, GEPS, and GTCS that matches the GEPS.

6. Upgrading the level-2 BIOS of the boardOn the LMT, load the latest BIOS files from the GBAM/GOMU to the boards.

7. Upgrading patch softwareOn the LMT, load, activate, and run patch software.

8. Upgrading software licenseOn the LMT, upgrade and activate the software license.

NOTE

If no patch software needs to be upgraded, you can skip this step during the BSC upgrade.




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13.2.7 BTS Loading ManagementThe BTS loading management involves managing the process of loading software to the boardsin the BTS.

The process of the BTS loading management is as follows:

1. After being started, the BTS broadcasts the BOOTP request over the OML. The BOOTPrequest message contains the BTS type, software type, and the software version in the flash.

2. On receiving the BOOTP request, the GSCU in the subrack where the Abis interface boardconnected to the BTS is installed, transparently transmits this request to the GSCU in theGMPS if the subrack is not the GMPS.

3. The GSCU in the GMPS returns a BOOTP response to the BTS, instructing the BTS boardto obtain and load the program file from the GBAM/GOMU.

4. After the program file is run, the board sends a LOAD request to the GSCU in the GMPS.The LOAD request is used to query the file list of the board (excluding the program file).

5. The GSCU in the GMPS responds with a file list, upon which the BTS board returns theversion information of the files concerning the board to the GSCU in the GMPS.

6. The GSCU in the GMPS compares the version information and then returns the fileinformation to be updated and the IP address of the GBAM/GOMU, to the board.

7. The BTS board loads the program file from the version area in the GBAM/GOMU.

13.2.8 BTS Upgrade ManagementThe BTS can be upgraded a later version. You can locally or remotely upgrade multiple BTSson the LMT/M2000 through the BSS OM network.

The BSC upgrade process is as follows:

1. Downloading BTS software

(1) The LMT/M2000 issues a download request command to the GBAM/GOMU. Thedownload request contains the parameters such as software name and FTP address.

(2) Upon reception of the response from the GBAM/GOMU, the LMT/M2000 downloadsthe BTS software to a specified directory in the GBAM/GOMU through the FTP.

2. Configuring BTS software

(1) The LMT/M2000 issues a configuration command to the GBAM/GOMU. Theconfiguration command contains a BTS software list, which contains the parameterssuch as BTS type, file type, and version number.

(2) The GBAM/GOMU saves the BTS software list in the memory database.3. Loading BTS software

(1) The LMT/M2000 issues loading commands to the GBAM/GOMU. The loadingcommands contain the parameters such as BTS type, file type, and version number.

(2) The GBAM/GOMU compares the parameters in the loading command with those inthe BTS software list in the database of its memory.l If the parameters are consistent, the GBAM/GOMU responds to the loading

request.l If the parameters are inconsistent, the GBAM/GOMU rejects the loading request.

The loading of BTS software terminates.



13-17

(3) The LMT/M2000 sends data frames to the BTS. The data frames are saved in the flashof the BTS boards. Upon reception of each 20 frames, the BTS returns the GBAM/GOMU with a response until the loading is completed.

4. Activating BTS software

(1) The LMT/M2000 issues an activating command to the GBAM/GOMU. The activatingcommand contains the parameters such as BTS type, file type, and version number.

(2) The GBAM/GOMU analyzes the parameters in the activating command and issuesthe activating command to the relevant BTS boards.

(3) The BTS boards obtain data and software information from the flash.5. Verifying upgrade result

You should verify the services to ensure that the BTS is successfully upgraded.




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14 BSC Signal Flow

About This Chapter

The BSC signal flow consists of the CS service signal flow, PS service signal flow, signalingflow, and OM signal flow.

14.1 BSC CS Signal FlowAfter a CS call is established, the MS and the network communicate with each other. In thiscase, the signal flow is referred to as the CS signal flow. The method of processing the BSC CSsignal flow varies with the transmission modes adopted on the Abis interface and the A interface,and also varies with the combination modes of BSC subracks.

14.2 BSC PS Signal FlowAfter a PS communication is established, the MS and the network communicate with each other.In this case, the signal flow is referred to as the PS signal flow. The method of processing theBSC PS signal flow varies with the types of PCU and with the transmission modes on the Abisinterface.

14.3 BSC Signaling FlowThe BSC signaling flow consists of the signaling flow on the Abis interface, A interface, Pbinterface, and Gb interface.

14.4 BSC OM Signal FlowThe BSC OM signal flow is initiated when you operate and maintain the BSC. The BSC OMsignal flow varies with the combination modes of the BSC subracks.

HUAWEI BSC6000 Base Station ControllerBSC Product Description 14 BSC Signal Flow


14-1

14.1 BSC CS Signal FlowAfter a CS call is established, the MS and the network communicate with each other. In thiscase, the signal flow is referred to as the CS signal flow. The method of processing the BSC CSsignal flow varies with the transmission modes adopted on the Abis interface and the A interface,and also varies with the combination modes of BSC subracks.

NOTE

l For details on the transmission modes on the Abis interface, refer to 15.1 Transmission andNetworking on the Abis Interface.

l For details on the transmission modes on the A interface, refer to 15.2 Transmission andNetworking on the A Interface.

Abis over TDM + A over TDM

In BM/TC separated configuration mode, the TDM transmission is used on both the Abisinterface and the A interface. For the BSC CS signal flow in this case, see Figure 14-1.

Figure 14-1 CS signal flow (1)

BTS

MSC

Abis AAter

BSC6000

GEIUT

GEIUT

GDPUX

GEIUA

GMPS/GEPS GTCS

GEIUB

GTNU

GTNU

As shown in Figure 14-1, the CS signal flow in the uplink is as follows:

1. The uplink CS signals are sent from the BTS to the GEIUB/GOIUB in the GMPS/GEPS.2. The CS signals are demultiplexed in the GEIUB/GOIUB. One CS signal uses a 64 kbit/s

timeslot and is transmitted to the GEIUT/GOIUT through the GTNU.3. The CS signals are multiplexed in the GEIUT/GOIUT. One full-rate CS signal uses a 16

kbit/s sub-timeslot, and one half-rate CS signal uses an 8 kbit/s sub-timeslot. The CS signalsare then transmitted to the GEIUT/GOIUT in the GTCS over the Ater interface.

4. The CS signals are de-multiplexed in the GEIUT/GOIUT of the GTCS. One CS signal usesa 64 kbit/s timeslot and is transmitted to the GDPUX through the GTNU.

5. The GDPUX performs voice coding/decoding and rate matching on the CS signals, whichare converted into 64 kbit/s PCM signals. The 64 kbit/s PCM signals are transmitted to theGEIUA/GOIUA through the GTNU, and then are transmitted to the MSC over the Ainterface.

In BM/TC combined configuration mode, the TDM transmission is used on both the Abisinterface and the A interface. For the BSC CS signal flow in this case, see Figure 14-2.

14 BSC Signal FlowHUAWEI BSC6000 Base Station Controller



Issue 02 (2008-10-20)


BTS

MSC

Abis A

BSC6000

GDPUX

GMPS/GEPS

GEIUA

GEIUB

GTNU


1. The uplink CS signals are sent from the BTS to the GEIUB/GOIUB in the GMPS/GEPS.2. The CS signals are de-multiplexed in the GEIUB/GOIUB. One CS signal uses a 64 kbit/s

timeslot and is transmitted to the GDPUX through the GTNU.3. The GDPUX performs voice coding/decoding and rate matching on the CS signals, which

are converted into 64 kbit/s PCM signals. The 64 kbit/s PCM signals are transmitted to theGEIUA/GOIUA through the GTNU, and then are transmitted to the MSC over the Ainterface.

Abis over HDLC/IP + A over TDM

In BM/TC separated configuration mode, the HDLC/IP transmission and TDM transmission areused on the Abis interface and A interface respectively. For the BSC CS signal flow in this case,see Figure 14-3.


BTS

MSC

Abis AAter

BSC6000

GEIUT

GEIUT

GDPUX

GEIUA

GMPS/GEPS GTCS

GDPUX

GFGUB

GSCU

GTNU

GTNU


1. The uplink CS signals are sent from the BTS to the GFGUB/GOGUB/GEHUB in theGMPS/GEPS.

2. The GFGUB/GOGUB/GEHUB transmits the CS signals to the GSCU, which thentransmits the signals to the GDPUX.



14-3

3. The GDPUX adjusts the frame order, eliminates jitter, and converts the PTRAU framesinto TRAU frames, which are then transmitted to the GEIUT/GOIUT through the GTNU.

4. The CS signals are multiplexed in the GEIUT/GOIUT of the GMPS/GEPS, and then aretransmitted to the GEIUT/GOIUT in the GTCS.

5. The CS signals are de-multiplexed in the GEIUT/GOIUT of the GTCS. One CS signal usesa 64 kbit/s timeslot and is transmitted to the GDPUX through the GTNU.

6. The GDPUX performs voice coding/decoding and rate matching on the CS signals, whichare converted into 64 kbit/s PCM signals. The 64 kbit/s PCM signals are transmitted to theGEIUA/GOIUA through the GTNU, and then are transmitted to the MSC over the Ainterface.

In BM/TC combined configuration mode, the HDLC/IP transmission and TDM transmissionare used on the Abis interface and A interface respectively. For the BSC CS signal flow in thiscase, see Figure 14-4.


BTS

MSC

Abis A

BSC6000

GDPUX

GMPS/GEPS

GEIUA

GEHUB

GSCU

GTNU


1. The uplink CS signals are sent from the BTS to the GEHUB/GFGUB/GOGUB in theGMPS/GEPS.

2. The CS signals are transmitted to the GDPUX through the GSCU.3. The GDPUX adjusts the frame order, eliminates jitter, and performs voice coding/decoding

and rate matching. The PTRAU frames are then converted into 64 kbit/s PCM frames.4. The PCM frames are transmitted to the GEIUA/GOIUA through the GTNU, and then are

transmitted to the MSC over the A interface.

Abis over TDM + A over IPThe TDM transmission and IP transmission are used on the Abis interface and A interfacerespectively. For the BSC CS signal flow in this case, see Figure 14-5.




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BTS

Abis

BSC6000

GDPUX

GMPS/GEPS

GFGUA

MGW

A

GEIUB

GTNU

GSCU


1. The uplink CS signals are sent from the BTS to the GEIUB/GOIUB in the GMPS/GEPS.2. The CS signals are de-multiplexed in the GEIUB/GOIUB. One CS signal uses a 64 kbit/s

timeslot and is transmitted to the GDPUX through the GTNU.3. The GDPUX converts the TRAU frames into RTP frames, adjusts the frame order, and

eliminates jitter.4. The GSCU transmits the CS signals to the GFGUA/GOGUA, which are then transmitted

to the MGW over the A interface.

Abis over HDLC/IP + A over IP

The HDLC/IP transmission and IP transmission are used on the Abis interface and A interfacerespectively. For the BSC CS signal flow in this case, see Figure 14-6.


BTS

MGW

Abis A

BSC6000

GDPUX

GMPS/GEPS

GFGUA

GFGUB

GSCU


1. The uplink CS signals are sent from the BTS to the GFGUB/GOGUB in the GMPS/GEPS.2. The CS signals are transmitted to the GDPUX through the GSCU.3. The GDPUX converts the PTRAU frames into RTP frames, adjusts the frame order, and

eliminates jitter.



14-5

4. The GSCU transmits the CS signals to the GFGUA/GOGUA, which are then transmittedto the MGW over the A interface.

14.2 BSC PS Signal FlowAfter a PS communication is established, the MS and the network communicate with each other.In this case, the signal flow is referred to as the PS signal flow. The method of processing theBSC PS signal flow varies with the types of PCU and with the transmission modes on the Abisinterface.

NOTE

For details on the transmission modes on the Abis interface, refer to 15.1 Transmission and Networkingon the Abis Interface.

BSC PS Signal Flow (Built-in PCU)

When the built-in PCU is used, three transmission modes can be used over the Abis interface:Abis over TDM, Abis over HDLC, and Abis over IP. The BSC PS signal flow varies with thetransmission modes on the Abis interface.

The built-in PCU is used and the TDM transmission is used on the Abis interface. For the BSCPS signal flow in this case, see Figure 14-7.

Figure 14-7 PS signal flow (Abis over TDM)

BTS

Abis

GDPUP

BSC6000

SGSN

Gb

GMPS/GEPS

GEPUG

GEIUB

GTNU

GSCU

When the built-in PCU is used, the PS signal flow on the uplink is as follows:

1. The packet data is sent from the BTS to the GEIUB in the GMPS/GEPS. The packet datauses one to four 16 kbit/s sub-timeslots on the Abis interface, depending on the modulationand coding scheme, such as CS1-CS9 or MCS1–MCS9.

2. The GEIUB transmits the packet data to the GTNU. After receiving the data, the GTNUtransmits the signals to the GDPUP.

3. The GDPUP performs format conversion, and then transmits the data to the GEPUG/GFGUG through the GSCU.

4. The GEPUG/GFGUG processes the packet data at layer 1 and at a part of the NS layer onthe Gb interface. Then, the packet data is transmitted to the SGSN over the Gb interface.

When the built-in PCU is used, the BSC PS signal flow in Abis over HDLC transmission modeis the same as that in Abis over IP transmission mode. See Figure 14-8.




Issue 02 (2008-10-20)

Figure 14-8 PS signal flow (Abis over IP)

Gb

BTS

SGSN

Abis

BSC6000

GDPUP

GMPS/GEPS

GEPUG

GSCU

GEHUB

The BSC PS signal flow in the uplink is as follows:

1. The PS signals are sent from the BTS to the GEHUB/GFGUB/GOGUB in the GMPS/GEPS.

2. The GSCU transmits the PS signals to the GDPUP.3. The GDPUP performs format conversion, and then transmits the data to the GEPUG/

GFGUG through the GSCU.4. The GEPUG/GFGUG processes the packet data at layer 1 and at a part of the NS layer on

the Gb interface. Then, the packet data is transmitted to the SGSN over the Gb interface.

BSC PS Signal Flow (External PCU)

The external PCU is used. For the BSC PS signal flow in this case, see Figure 14-9.

Figure 14-9 BSC PS signal flow (external PCU )

BTS

PCU

Abis Pb

GEIUP

BSC6000

SGSN

Gb

GMPS/GEPS

GEIUB

GTNU

When the external PCU is used, the BSC PS signal flow on the uplink is as follows:

1. The packet data is sent from the BTS to the GEIUB in the GMPS/GEPS. The packet datauses one to four 16 kbit/s sub-timeslots on the Abis interface, depending on the modulationand coding scheme, such as CS1-CS9 or MCS1–MCS9.

2. The GTNU transmits the PS signals to the GEIUP/GOIUP.3. The PS signals are transmitted to the PCU over the Pb interface, and then to the SGSN over

the Gb interface.



14-7

14.3 BSC Signaling FlowThe BSC signaling flow consists of the signaling flow on the Abis interface, A interface, Pbinterface, and Gb interface.

14.3.1 Signaling Flow on the Abis InterfaceThe protocol stack and signaling flow on the Abis interface vary with the transmission modeson the Abis interface.

14.3.2 Signaling Flow on the A InterfaceThe protocol stack and signaling flow on the A interface vary with the transmission modes onthe A interface.

14.3.3 Signaling flow on the Pb interfaceThis describes the protocol stack and signaling flow on the Pb interface.

14.3.4 Signaling Flow on the Gb InterfaceThis describes the protocol stack and signaling flow on the Gb interface.

14.3.1 Signaling Flow on the Abis InterfaceThe protocol stack and signaling flow on the Abis interface vary with the transmission modeson the Abis interface.

NOTE

The GXPUM originates and terminates all the signaling flows of the BSC.

Signaling Flow on the Abis Interface (Abis over TDM)

The TDM transmission is used on the Abis interface. For the signaling flow on the Abis interfacein this case, see Figure 14-10.

Figure 14-10 Protocol stack on the Abis interface (Abis over TDM)

BTSM BTSM

RR

Abis

BTS BSC

Layer1 Layer1

LAPD LAPD

Figure 14-11 shows the signaling flow on the Abis interface.




Issue 02 (2008-10-20)

Figure 14-11 Signaling Flow on the Abis Interface (Abis over TDM)

BTS

Abis

BSC6000

GMPS/GEPS

GEIUB

GSCU

GXPUM

The signaling flow on the Abis interface is as follows:

1. The signaling is transmitted to the GEIUB/GOIUB in the GMPS/GEPS over the Abisinterface. Then, the signaling is transmitted to the GSCU.

2. The GSCU transmits the signaling to the GXPUT/GXPUM.3. The GXPUT/GXPUM processes the signaling according to the LAPD and RR protocols.

The GXPUM processes the signaling according to the BTSM protocol.

Signaling Flow on the Abis Interface (Abis over HDLC)The HDLC transmission is used on the Abis interface. For the signaling flow on the Abisinterface in this case, see Figure 14-12.

Figure 14-12 Protocol stack on the Abis interface (Abis over HDLC)

BTSM

Abis

BTS BSC

HDLC HDLC

LAPD LAPD

BTSM

RR

Layer 1 Layer 1




14-9

Figure 14-13 Signaling Flow on the Abis Interface (Abis over HDLC)

BTS

Abis

BSC6000

GXPUM

GMPS/GEPS

GEHUB

GSCU


1. The signaling is transmitted to the GEHUB in the GMPS/GEPS over the Abis interface.Then, the GEHUB transmits the signaling to the GSCU.

2. The GSCU transmits the signaling to the GXPUT/GXPUM.3. The GXPUT/GXPUM processes the signaling according to the LAPD and RR protocols.

The GXPUM processes the signaling according to the BTSM protocol.

Signaling Flow on the Abis Interface (Abis over IP)The IP transmission is used on the Abis interface. For the signaling flow on the Abis interfacein this case, see Figure 14-14.

Figure 14-14 Protocol stack on the Abis interface (Abis over IP)

BTSM BTSM

RR

Abis

BTS BSC

MAC

LAPD LAPD

MAC

UDP

IP

UDP

IP

Layer1 Layer1





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Figure 14-15 Signaling Flow on the Abis Interface (Abis over IP)

BTS

Abis

BSC6000

GXPUM

GMPS/GEPS

GFGUB

GSCU


1. The signaling is transmitted to the GFGUB/GOGUB in the GMPS/GEPS over the Abisinterface.

2. The GFGUB/GOGUB processes the signaling according to the MAC, IP, and UDPprotocols, and then transmits the signaling to the GXPUT/GXPUM through the GSCU.

3. The GXPUT/GXPUM processes the signaling according to the LAPD and RR protocols.The GXPUM processes the signaling according to the BTSM protocol.

14.3.2 Signaling Flow on the A InterfaceThe protocol stack and signaling flow on the A interface vary with the transmission modes onthe A interface.

Signaling Flow on the A Interface (A over TDM)The A interface is the logical interface between the BSC and the MSC. The BSC internalsignaling flow from the A interface varies, depending on the signaling protocols used on the Ainterface.

When TDM transmission is used on the A interface, the E1/T1 or STM-1 transmission is usedon the physical layer. The transmission on the data link layer complies with the SS7 MTP2protocol. The transmission on the network layer complies with the MTP3 and SCCP protocols.The transmission on the application layer complies with the BSSAP protocol and the layer-3protocols on the Um interface. Figure 14-16 shows the protocol stack on the A interface.



14-11

Figure 14-16 Protocol stack on the A interface (A over TDM)

SCCPMTP3

BSSMAP

MSC

A

BSC

CM

MM

BSSMAP

SCCPMTP3

MTP2 MTP2

Layer1 Layer1

The BSC internal signaling flow from the A interface varies with the configuration modes ofthe BSC subracks.

l Figure 14-17 shows the BSC internal signaling flow in the BM/TC separated configurationmode.

l Figure 14-18 shows the BSC internal signaling flow in the BM/TC combined configurationmode..

Figure 14-17 Signaling flow on the A interface (A over TDM) (BM/TC separated)

MSC

A

BSC6000

Ater

GEIUT

GEIUA

GEIUT

GMPS/GEPS GTCS

GXPUM

GSCU

GSCU

As shown in Figure 14-17, the BSC internal signaling flow from the A interface is as follows:

1. In the GMPS/GEPS, the GXPUM/GXPUT processes the signaling according to the MTP3,SCCP, and BSSAP protocols. The GEIUT processes the signaling according to the MTP2protocol.

2. The signaling is transparently transmitted in the GTCS, and then is transmitted to the MSCover the A interface.




Issue 02 (2008-10-20)

Figure 14-18 Signaling flow on the A interface (A over TDM) (BM/TC combined)

MSC

A

BSC6000

GEIUA

GMPS/GEPS

GXPUM

GSCU

As shown in Figure 14-18, the BSC internal signaling flow from the A interface is as follows:

1. In the GMPS/GEPS, the GXPUM/GXPUT processes the signaling according to the MTP3,SCCP, and BSSAP protocols.

2. The GEIUA/GOIUA processes the signaling according to the MTP2 protocol. Then, thesignaling is transmitted to the MSC over the A interface.

Signaling Flow on the A Interface (A over IP)If IP transmission is used on the A interface, the E1/T1 or STM-1 transmission is used on thephysical layer. The transmission on the data link layer complies with the SigTRAN M3UA/SCTP/IP protocols. The transmission on the network layer complies with the SS7 SCCPprotocol. The transmission on the application layer complies with the DATP and BSSAPprotocols. Figure 14-19 shows the protocol stack on the A interface.

Figure 14-19 Protocol stack on the A interface (A over IP)MSC Server

A

BSC

BSSMAP

SCCP

MAC/PPP

IP

M3UA

SCTP

DTAP BSSMAP

SCCP

MAC/PPP

IP

M3UA

SCTP

DTAP

Layer1 Layer1



14-13

Figure 14-20 shows the signaling flow on the A interface.

Figure 14-20 Signaling flow on the A interface (A over IP)

MGW

A

BSC6000

GFGUA

GMPS/GEPS

MSC

GXPUM

GSCU

The BSC internal signaling flow from the A interface is as follows:

1. In the GMPS/GEPS, the GXPUM/GXPUT processes the signaling according to theBSSAP, SCCP, SCTP, and M3UA protocols. Then, the signaling is transmitted to theGFGUA/GOGUA through the GSCU.

2. The GFGUA/GOGUA processes the signaling according to the IP protocol. Then, thesignaling is transmitted to the MSC through the A interface.

14.3.3 Signaling flow on the Pb interfaceThis describes the protocol stack and signaling flow on the Pb interface.

When the external PCU is used, the BSC provides the Pb interface to enable the communicationbetween the BSC and the PCU. The Pb interface, defined by Huawei, is a non-standard logicalinterface between BSC and PCU. Figure 14-21 shows the protocol stack on the Pb interface.

Figure 14-21 Protocol stack on the Pb interface

LAPD

Layer1

PbIP

PCU

Pb

BSC

APP

LAPD

Layer1

RR

Figure 14-22 shows the signaling flow on the Pb interface.




Issue 02 (2008-10-20)

Figure 14-22 Signaling flow on the Pb interface

PCU

Pb

GEIUP

GXPUM

BSC6000

GSCU

GMPS/GEPS

The BSC internal signaling flow from the Pb interface is as follows:

1. The signaling is transmitted to the GEIUP/GOIUP in the GMPS/GEPS over the Pbinterface.

2. The GEIUP/GOIUP processes the signaling according to the LAPD protocol.3. On receiving the signaling from the GSCU, the GXPUT/GXPUM processes the signaling

based on the PbIP and RR protocols.

14.3.4 Signaling Flow on the Gb InterfaceThis describes the protocol stack and signaling flow on the Gb interface.

The Gb interface is the logical interface between the BSC and the SGSN. The E1/T1 or FE/GEtransmission is used on the physical layer. The transmission on the data link layer complies withthe NS protocol, and the sub NS layer of the NS protocol complies with the FR or IP protocol.The transmission on the application layer complies with the BSSGP protocol. Figure 14-23shows the protocol stack on the Gb interface.

Figure 14-23 Protocol stack on the Gb interface

NS

Layer1

BSSGP

SGSN

Gb

BSC

GMM/SM

LLC

BSSGP

NS

Layer1



14-15

Figure 14-24 shows the signaling flow on the Gb interface.

Figure 14-24 Signaling flow on the Gb interface

SGSN

Gb

GEPUG

GXPUM

BSC6000

GSCU

GMPS/GEPS

The BSC internal signaling flow from the Gb interface is as follows:

1. The signaling is transmitted to the GMPS/GEPS over the Gb interface.If the sub NS layer of the NS protocol complies with the FR protocol, the Gb interfaceboard is the GEPUG. If the sub NS layer of the NS protocol complies with the IP protocol,the Gb interface board is the GFGUG.

2. The GSCU transmits the signaling to the GXPUM.3. The GXPUM processes the signaling according to the NS and BSSGP protocols.

14.4 BSC OM Signal FlowThe BSC OM signal flow is initiated when you operate and maintain the BSC. The BSC OMsignal flow varies with the combination modes of the BSC subracks.

14.4.1 BSC OM Signal Flow (BM/TC Separated)The BSC OM signal flow (BM/TC separated) refers to the signal flow that is generated whenOM is performed on the BSC and when the BM and TC are configured in different subracks.

14.4.2 BSC OM Signal Flow (BM/TC Combined)The BSC OM signal flow (BM/TC combined) refers to the signal flow that is generated whenOM is performed on the BSC and when the BM and TC are configured in the same subrack.

14.4.3 BSC OM Signal Flow (A over IP)The BSC OM signal flow (A over IP) refers to the signal flow that is generated when OM isperformed on the BSC and when the IP transmission is used on the A interface.

14.4.1 BSC OM Signal Flow (BM/TC Separated)The BSC OM signal flow (BM/TC separated) refers to the signal flow that is generated whenOM is performed on the BSC and when the BM and TC are configured in different subracks.

The BSC internal OM signal flow varies with the installation position of the GTCS.




Issue 02 (2008-10-20)

GTCS Configured on the BSC SideThe GTCS is configured on the BSC side. For the OM signal flow in the BSC in this case, seeFigure 14-25.

Figure 14-25 OM signal flow (GTCS configured on the BSC side)

业务单板

GEPS

BSC6000

GSCU Service

board

GSCU

Ater

GMPS

GEPS

GTCS configured onthe BSC side

GSCU

GOMU

Serviceboard

LMT/M2000

Serviceboard

As shown in Figure 14-25, the OM signal flow in the BSC is as follows:

l OM signal flow in the GMPS

1. The OM signal is transmitted from the LMT/M2000 to the GBAM/GOMU.2. After being processed by the GBAM/GOMU, the OM signal is transmitted to the

GSCU in the GMPS. The GSCU then transmits the OM signal to the service boardsthat require maintenance.

l OM signal flow in the GEPS


GSCU in the GMPS. The GSCU then transmits the OM signal to the GSCU in theGEPS.

3. In the GEPS, the GSCU transmits the OM signal to the service boards that requiremaintenance.

l OM signal flow in the GTCS


GSCU in the GMPS. The GSCU then transmits the OM signal to the GSCU in themain GTCS.

3. In the main GTCS, the GSCU transmits the OM signal to the service boards that requiremaintenance. Alternatively, the GSCU in the main GTCS transmits the OM signal to



14-17

the GSCU in an extension GTCS. Then, in the extension GTCS, the GSCU transmitsthe OM signal to the service boards that require maintenance.

GTCS Configured on the MSC Side

The GTCS is configured on the MSC side. For the OM signal flow in the BSC in this case, seeFigure 14-26.

Figure 14-26 OM signal flow (GTCS configured on the MSC side)

GSCU

业务单板

GEPS

BSC6000

GSCU

GSCU

GEIUT

GEIUT

Ater

GMPS

GEPS

GTCS configured on the MSC side

GSCU

GOMU

LMT/M2000

Service board

Service board

Service board



1. The OM signal is transmitted from the LMT/M2000 to the GBAM/GOMU.

2. After being processed by the GBAM/GOMU, the OM signal is transmitted to theGSCU in the GMPS. The GSCU then transmits the OM signal to the service boardsthat require maintenance.



2. After being processed by the GBAM/GOMU, the OM signal is transmitted to theGSCU in the GMPS. The GSCU then transmits the OM signal to the GSCU in theGEPS.


l OM signal flow in the GTCS





Issue 02 (2008-10-20)

2. After being processed by the GBAM/GOMU, the OM signal is transmitted to theGEIUT/GOIUT in the GMPS. Then, the GEIUT/GOIUT in the GMPS transmits theOM signal to the GEIUT/GOIUT in the main GTCS through the Ater interface.

3. In the main GTCS, the GSCU transmits the OM signal to the service boards that requiremaintenance. Alternatively, the GSCU in the main GTCS transmits the OM signal tothe GSCU in an extension GTCS. Then, in the extension GTCS, the GSCU transmitsthe OM signal to the service boards that require maintenance.

14.4.2 BSC OM Signal Flow (BM/TC Combined)The BSC OM signal flow (BM/TC combined) refers to the signal flow that is generated whenOM is performed on the BSC and when the BM and TC are configured in the same subrack.

Figure 14-27 shows the OM signal flow in the BSC in BM/TC combined configuration mode.

Figure 14-27 BSC OM signal flow (BM/TC combined)

GSCU

GEPS

BSC6000GMPS GEPS

GSCU

GOMU

Service board

LMT/M2000

Service board

GSCU









14.4.3 BSC OM Signal Flow (A over IP)The BSC OM signal flow (A over IP) refers to the signal flow that is generated when OM isperformed on the BSC and when the IP transmission is used on the A interface.

Figure 14-28 shows the OM signal flow in the BSC in A over IP configuration mode.



14-19

Figure 14-28 BSC OM signal flow (A over IP)

GSCU

GEPS

BSC6000GMPS GEPS

GSCU

GOMU

Service board

LMT/M2000

Service board

GSCU












Issue 02 (2008-10-20)

15 BSC Transmission and Networking

About This Chapter

This describes various transmission and networking modes between the BSC and other NEs.

15.1 Transmission and Networking on the Abis InterfaceThis describes the networking between the BSC and the BTS. Three transmission modes can beused over the Abis interface: Abis over TDM, Abis over HDLC, and Abis over IP.

15.2 Transmission and Networking on the A InterfaceThis describes the transmission and networking between the BSC and the MSC/MGW.

15.3 Transmission and Networking on the Pb InterfaceThis describes the transmission and networking between the BSC and the external PCU.

15.4 Transmission and Networking on the Ater InterfaceThis describes the transmission and networking between the BM subrack and the TC subrack.

15.5 Transmission and Networking on the Gb InterfaceThis describes the transmission and networking between the BSC and the SGSN. Twotransmission modes can be used on the Gb interface: Gb over FR and Gb over IP.

HUAWEI BSC6000 Base Station ControllerBSC Product Description 15 BSC Transmission and Networking


15-1

15.1 Transmission and Networking on the Abis InterfaceThis describes the networking between the BSC and the BTS. Three transmission modes can beused over the Abis interface: Abis over TDM, Abis over HDLC, and Abis over IP.

Transmission Modes on the Abis Interface

The following transmission modes can be used on the Abis interface:

l Abis over TDM

Abis over TDM indicates that the TDM transmission is used on the Abis interface. In thiscase, the Abis interface board is the GEIUB/GOIUB/GEXUB/GOXUB, and thetransmission network between the BSC and the BTS is the SDH/PDH network.

l Abis over HDLC

Abis over HDLC indicates that layer 2 of the Abis interface protocol stack uses the HDLCprotocol. In this case, the Abis interface board is the GEHUB/GEXUB/GOXUB, and thetransmission network between the BSC and the BTS is the SDH/PDH network.

l Abis over IP

Abis over IP indicates that layer 3 of the Abis interface protocol stack uses the IP protocol.In this case, the Abis interface board is the GFGUB/GOGUB, and the transmission networkbetween the BSC and the BTS is the IP network.

NOTE

Except that the Abis interface boards are different, the BSC PS signal flow in Abis over HDLC mode isthe same as that in Abis over IP mode.

Abis over TDM

In the Abis over TDM networking mode, the Abis interface board in the BSC is the GEIUB/GOIUB/GEXUB/GOXUB. The GEIUB/GEXUB provides E1/T1 electrical ports, and theGOIUB/GOXUB provides STM-1 optical ports.

l Figure 15-1 shows the E1/T1-based TDM networking on the Abis interface.

l Figure 15-2 shows the STM-1-based TDM networking on the Abis interface.

Figure 15-1 E1/T1-based TDM networking on the Abis interface

SDH/PDH network

ADM/DXC ADM/DXC DDFE1/T1

DDF

BTS

E1/T1

E1/T1

BSC

GEIUB

GEXUB

15 BSC Transmission and NetworkingHUAWEI BSC6000 Base Station Controller



Issue 02 (2008-10-20)

Figure 15-2 STM-1-based TDM networking on the Abis interface

STM-1

ODF

BTS

E1/T1DDF SDH/PDH

networkADM/DXCADM/DXC BSC

GOIUB

GOXUBSTM-1

NOTE

If the BTSs connected to the BSC are distributed on different PDH/SDH rings, additional ADM/DXCdevices should be used.

Advantages: The networking mode features maturity, flexible QoS, and security. Telecomoperators can make full use of the SDH/PDH transmission network resources.

Disadvantages: Compared with the IP transmission networking mode, the cost of this networkingmode is high.

Abis over HDLCIn Abis over HDLC networking mode, the Abis interface board in the BSC is the GEHUB/GEXUB/GOXUB. The GEHUB/GEXUB provides E1/T1 electrical ports, and the GOXUBprovides STM-1 optical ports. The BSC can be connected to the BTS in HDLC transmissionmode or to the Hub BTS.

l Figure 15-3 shows the E1/T1-based HDLC networking on the Abis interface.

l Figure 15-4 shows the STM-1-based HDLC networking on the Abis interface.

Figure 15-3 E1/T1-based HDLC networking on the Abis interface

BTS

SDH/PDH network

DDF

E1/T1

ADM/DXC ADM/DXC DDF

Hub BTSBTS

E1/T1

E1/T1

E1/T1

BSC

GEHUB

GEXUB



15-3

Figure 15-4 STM-1-based HDLC networking on the Abis interface

BTS

SDH/PDH network

DDF

E1/T1

ADM/DXC ADM/DXC ODF

Hub BTSBTS

E1/T1

STM-1BSC

GOXUB

Advantages: If the networking mode is used, the utilization of the transmission resources overthe Abis interface is improved without reconstruction of the existing SDH/PDH networks.

Disadvantages: If the BTS ring topology is used, the BSC must be configured with the GEXUB/GOXUB, which serves as the Abis interface board.

Hybrid Networking (Abis over TDM and Abis over HDLC)The Abis over TDM and Abis over HDLC networking modes can be used on the Abis interfacesimultaneously. In this case, the Abis interface supports the following configuration modes:

l Configuration mode 1The BSC is configured with the GEIUB/GOIUB and GEHUB. Where, the GEIUB/GOIUBsupports TDM transmission and the GEHUB supports HDLC transmission. See Figure15-5.

l Configuration mode 2The BSC is configured with the GEXUB/GOXUB, which supports both TDM and HDLCtransmission. See Figure 15-6.

Figure 15-5 Hybrid networking (Abis over TDM and Abis over HDLC) (configuration mode1)

BTS

SDH/PDH network

DDF

E1/T1

ADM/DXC ADM/DXC DDF

Hub BTSBTS

E1/T1

E1/T1

E1/T1

BSC

GEIUB

GEHUB




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Figure 15-6 Hybrid networking (Abis over TDM and Abis over HDLC) (configuration mode2)

BTS

SDH/PDH network

DDF

E1/T1

ADM/DXC ADM/DXC DDF

Hub BTSBTS

E1/T1

E1/T1 BSC

GEXUB

The characteristics of hybrid networking mode 1 are as follows:

l Advantages: If the Abis over HDLC networking mode is used, the utilization of thetransmission resources over the Abis interface is improved without reconstruction of theexisting SDH/PDH networks.

l Disadvantages: For hybrid combined cabinets and cabinet groups, as some BTSs use HDLCtransmission and some use TDM transmission, at least two cables are required to connectthe BTS to the BSC. Therefore, transmission resources are wasted.

The characteristics of hybrid networking mode 2 are as follows:

l Advantages: On the Abis interface, TDM transmission can be smoothly evolved into HDLCtransmission.

l Disadvantages: Data configuration is required to implement the timeslot monitoringfunction.

Abis over IPIn the Abis over IP networking mode, the Abis interface board in the BSC is the GFGUB/GOGUB. Based on the transmission networks, the Abis over IP networking modes can beclassified into the following types:

l Figure 15-7 shows the Multi-Service Transmission Platform (MSTP) based IP networking.

l Figure 15-8 shows the data-network-based IP networking.

Figure 15-7 MSTP-based IP networking on the Abis interface

FE FE/GE

BTS Router Router

MSTP BSC

GFGUB



15-5

Figure 15-8 Data-network-based IP networking on the Abis interface

Data networkIP/MPLS/VPN

FE

BSC

GFGUB

BTSSwitch

Router

FE

BTS

Router

FE/GE

Advantages of MSTP-based IP networking:

l Applies to the telecom operators that have established the SDH network or MSTP network.

l Provides up to 100 Mbit/s transmission bandwidth through the FE/GE ports, thusfacilitating the BTS upgrade and capacity expansion.

l Provides the VC trunk function, which enables the establishment of two VC trunk linksbetween the BTS and the BSC and ensures the security of data transmission. These twolinks can be used to transmit real-time service data and non-real-time service data.

Disadvantages of MSTP-based IP networking: The MSTP network does not support theevolution from telecommunication networks to IP networks.

Advantages of data-network-based IP networking:

l Provides large-capacity bandwidth and reliable transmission on the Abis interface

l Supports the evolution from GSM networks to IP networks

Disadvantages of data-network-based IP networking: cannot ensure good QoS. The end-to-endQoS mechanism must be adopted.

15.2 Transmission and Networking on the A InterfaceThis describes the transmission and networking between the BSC and the MSC/MGW.

Transmission Modes on the A Interface

The following transmission modes can be used on the A interface:

l A over TDM

A over TDM indicates that the TDM transmission is used on the A interface. In this case,the A interface board is the GEIUA/GOIUA, and the transmission network between theBSC and the MSC/MGW is the SDH/PDH network.

l A over IP




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A over IP indicates that layer 3 of the A interface protocol stack uses the IP protocol. Inthis case, the A interface board is the GFGUA/GOGUA, and the transmission networkbetween the BSC and the MGW is the IP network.

A over TDMIn A over TDM networking mode, the A interface board in the BSC is the GEIUA/GOIUA,which provides E1/T1 ports and STM-1 ports. The A over IP networking mode varies withwhether the TC function is performed by the BSC.

l E1/T1 Transmission on the A Interface– The TC function is performed by the BSC. For the networking mode in this case, see

Figure 15-9.– The TC function is performed by the MGW. For the networking mode in this case, see

Figure 15-10.l STM-1 Transmission on the A Interface

– The TC function is performed by the BSC. For the networking mode in this case, seeFigure 15-11.

– The TC function is performed by the MGW. For the networking mode in this case, seeFigure 15-12.

Figure 15-9 E1/T1-based TDM networking on the A interface (1)

SDH/PDH network

E1/T1 DDF E1/T1ADM/DXC ADM/DXC DDF

MSC

GEIUA

BSC

Figure 15-10 E1/T1-based TDM networking on the A interface (2)

SDH/PDH network

E1/T1 DDF E1/T1ADM/DXC ADM/DXC DDF

MGW MSC Server

GEIUA

BSC

Figure 15-11 STM-1-based TDM networking on the A interface (1)

MSC

STM-1 ODF E1/T1DDFSDH/PDH network

ADM/DXC ADM/DXC

GOIUA

BSC



15-7

Figure 15-12 STM-1-based TDM networking on the A interface (2)

SDH/PDH network

STM-1 ODF E1/T1DDFADM/DXC ADM/DXC

MGW MSC Server

GOIUA

BSC

Advantages: The networking mode features maturity, flexible QoS, and security. Telecomoperators can make full use of the SDH/PDH transmission network resources.

Disadvantages: Compared with the IP transmission networking mode, the cost of this networkingmode is high.

A over IP

If IP transmission is used on the A interface, the TC function is performed by the MGW.

In A over IP networking mode, the A interface adopts the VLAN technology. In other words,signaling and service signals are labeled different VLAN IDs, which are used to differentiatethe signaling, voice service signals, and data service signals over the same physical link. Thus,QoS is improved.

In A over IP networking mode, the A interface board in the BSC is the GFGUA/GOGUA, whichprovides FE/GE electrical ports and GE optical ports.

Figure 15-13 shows the A over IP networking mode in which the transmission between the BSCand the MGW is the layer 2 IP network.

Figure 15-14 shows the A over IP networking mode in which the transmission between the BSCand the MGW is the layer 3 IP network.

Figure 15-13 IP networking on the A interface (1)

FE/GE

Switch

Switch

MSC Server

MGW

Switch

GFGUA

BSC L2 IP newwork




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Figure 15-14 IP networking on the A interface (2)

FE/GEGFGUA

BSC

MSC Server

MGW

L3 IP newwork

Router

Router

Router

Advantages: This networking mode provides large-capacity bandwidth and reliable transmissionon the A interface. It also supports the evolution from GSM networks to IP networks.

Disadvantages: The BSC must be connected to the Huawei MGW.

15.3 Transmission and Networking on the Pb InterfaceThis describes the transmission and networking between the BSC and the external PCU.

Pb over TDM indicates that the TDM transmission is used on the Pb interface. In this case, thePb interface board is the GEIUP/GOIUP, and the transmission network between the BSC andthe PCU is the SDH/PDH network.

The Pb interface supports only the TDM networking mode. The Pb interface board in the BSCis the GEIUP/GOIUP, which provides E1/T1 ports and STM-1 ports respectively.

l Figure 15-15 shows the E1/T1-based TDM networking on the Pb interface.

l Figure 15-16 shows the STM-1-based TDM networking on the Pb interface.

Figure 15-15 E1/T1-based TDM networking on the Pb interface

SDH/PDH network

E1/T1DDF

E1/T1ADM/DXC ADM/DXC DDF

PCU

GEIUP

BSC



15-9

Figure 15-16 STM-1-based TDM networking on the Pb interface

STM-1ODF

E1/T1DDF

PCU

SDH/PDH network

ADM/DXC ADM/DXC

GOIUP

BSC

15.4 Transmission and Networking on the Ater InterfaceThis describes the transmission and networking between the BM subrack and the TC subrack.

When the BM and the TC are configured in different subracks, they communicate with eachother over the Ater interface. The Ater interface supports only the TDM networking mode. Basedon the installation positions of the GTCS, several transmission and networking modes can beused on the Ater interface.

l The GTCS is configured on the BSC side, and the E1/T1 transmission is used on the Aterinterface. For the networking on the Ater interface in this case, see Figure 15-17.

l The GTCS is configured on the MSC side, and the E1/T1 transmission is used on the Aterinterface. For the networking on the Ater interface in this case, see Figure 15-18.

l The GTCS is configured on the MSC side, and the STM-1 transmission is used on the Aterinterface. For the networking on the Ater interface in this case, see Figure 15-19.

Figure 15-17 E1/T1-based networking on the Ater interface (GTCS configured on the BSC side)

E1/T1DDF

E1/T1GEIUT

MainGTCS

GEIUT

GMPS

Figure 15-18 E1/T1-based networking on the Ater interface (GTCS configured on the MSCside)

E1/T1DDF DDFADM/DXC

GEIUT

GMPSE1/T1

GEIUT

MainGTCS

SDH/PDH network

ADM/DXC ADM/DXC




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Figure 15-19 STM-1-based networking on the Ater interface (GTCS configured on the MSCside)

STM-1ODF

STM-1ODFSDH/PDH

networkADM/DXC ADM/DXC

GOIUT

GMPS

GOIUT

MainGTCS

15.5 Transmission and Networking on the Gb InterfaceThis describes the transmission and networking between the BSC and the SGSN. Twotransmission modes can be used on the Gb interface: Gb over FR and Gb over IP.

Transmission Modes on the Gb Interface

The following transmission modes can be used on the Gb interface:

l Gb over FRGb over FR indicates that the Frame Relay (FR) protocol is used on the sub NS layer ofthe Gb interface protocol stack. In this case, the Gb interface board is the GEPUG, and thetransmission network between the BSC and the SGSN is the FR network.

l Gb over IPGb over IP indicates that the IP protocol is used on the sub NS layer of the Gb interfaceprotocol stack. In this case, the Gb interface board is the GFGUG, and the transmissionnetwork between the BSC and the SGSN is the IP network.

Gb over FR

In Gb over FR networking mode, the transmission network between the BSC and the SGSN isthe FR network. The Gb interface board in the BSC is the GEPUG, which provides E1/T1 ports,as shown in Figure 15-20.

Figure 15-20 E1/T1-based FR networking on the Gb interface

E1/T1 E1/T1

SGSN

GEPUG

BSC Fram Relay netwrok

Advantages: The networking mode features maturity and can make full use of the existing FRnetwork.



15-11

Disadvantages: The bandwidth on the Gb interface is insufficient, so large-capacity requirementsof data services cannot be met.

Gb over IPIn Gb over IP networking mode, the transmission network between the BSC and the SGSN isthe IP network. The Gb interface board in the BSC is the GFGUG, which provides FE/GE ports,as shown in Figure 15-21.

Figure 15-21 FE/GE-based IP networking on the Gb interface

FE/GE

SGSN

Router Router

FE/GEGFGUG

BSC

Advantages: Compared with the FR networking mode, the bandwidth on the Gb interface in theIP networking mode is greatly increased, thus reducing the costs of network construction andOM.

Disadvantages: The transmission in Gb over IP networking mode is less reliable than that in Gbover FR networking mode.




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16 BSC Technical Specifications

About This Chapter

The BSC technical specifications consist of the capacity specifications, engineeringspecifications, physical port specifications, reliability specifications, clock precisionspecifications, noise and safety compliance, and environment specifications.

16.1 BSC Capacity SpecificationsThe BSC capacity specifications consist of CS service capacity specifications and PS servicecapacity specifications.

16.2 BSC Engineering SpecificationsThe BSC engineering specifications consist of the structural specifications, power consumptionspecifications, and electrical specifications.

16.3 BSC Physical InterfacesThe BSC physical interfaces consist of the transmission interfaces and clock interfaces.

16.4 BSC Reliability SpecificationsThe reliability specifications of the BSC consist of the system availability in typicalconfiguration, Mean Time Between Failures (MTBF), success rate of the switchover of the activeand standby boards, Mean Time To Repair (MTTR), and entire equipment yearly repair rate.

16.5 BSC Clock Precision RequirementsThe BSC clock specifications consist of the clock precision, pull-in range, maximum frequencyoffset, and initial maximum frequency offset.

16.6 BSC Noise and Safety ComplianceThe noise level and safety requirements of the BSC comprise specifications pertaining to noisecontrol and the requirements that the BSC should meet.

16.7 BSC Environment RequirementsThe BSC must comply with the environment requirements in terms of storage, transportation,and operation.

16.8 Technical Specifications of BSC PartsThe technical specifications of the BSC parts consist of the specifications of the GBAM, GOMU,power distribution box, and fan box.

HUAWEI BSC6000 Base Station ControllerBSC Product Description 16 BSC Technical Specifications


16-1

16.1 BSC Capacity SpecificationsThe BSC capacity specifications consist of CS service capacity specifications and PS servicecapacity specifications.

Table 16-1 lists the capacity specifications of the BSC.

Table 16-1 Capacity specification of the BSC

Specification Value

Maximum number ofBTSs

2,048

Maximum number ofcells

2,048

Maximum number ofTRXs

2,048

BHCA 3,500,000

Maximum number ofsubscribers

650,000

Maximum trafficvolume

13,000 Erl

Maximum number ofPDCHs that can beconfigured

15,360

Maximum number ofTBFs supported by aPDCH

l Uplink: 7

l Downlink: 8

Number of 16 kbit/stimeslots on the Abisinterface

61,440

EDGE RTTspecification

≤ 200 ms

Throughput on theGb interface

512 Mbit/s

16.2 BSC Engineering SpecificationsThe BSC engineering specifications consist of the structural specifications, power consumptionspecifications, and electrical specifications.

Structural SpecificationsTable 16-2 lists the structural specifications of the BSC.

16 BSC Technical SpecificationsHUAWEI BSC6000 Base Station Controller



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Table 16-2 Structural specifications

Specification Value

Cabinet standard IEC60297 standard and IEEE standard

Cabinet outline dimensions 2,200 mm (height) x 600 mm (width) x 800 mm (depth)

Available cabinet space height 46 U

Weight of the cabinet Empty cabinet ≤ 150 kg; cabinet in full configuration≤ 350 kg

Load-bearing capability of theequipment room

≥ 450 kg/m2

Power Consumption SpecificationsTable 16-3 lists the power consumption specifications of the BSC.

Table 16-3 Power consumption specifications

RecommendedConfiguration

PowerConsumption(Ater overSTM-1, Abisover E1,Excluding theGTCS)

PowerConsumption(A overSTM-1, Abisover E1, BM/TCCombined)

PowerConsumption(A over E1,Abis over E1,BM/TCCombined)

PowerConsumption(A over FE,Abis over FE)

512 TRXs 700 W 890 W 1,325 W 890 W

1,024 TRXs 1,080 W 1,510 W 2,320 W 1,510 W

1,536 TRXs 1,360 W 1,950 W 3,250 W 1,950 W

2,048 TRXs 1,530 W 2,325 W 3,340 W 2,325 W

Electrical SpecificationsTable 16-4 describes the power supply and electromagnetic compatibility (EMC) specificationsof the BSC.

Table 16-4 Power supply and EMC specifications of the BSC

Specification Value

Power supply The BSC uses -48 V DC input.

EMC Complies with the ETSI EN 300 386 V1.3.2(2003-05)

16.3 BSC Physical InterfacesThe BSC physical interfaces consist of the transmission interfaces and clock interfaces.



16-3

Transmission Interfaces of the BSCThe BSC has external transmission interfaces and internal transmission interfaces. Table 16-5lists the specifications of the external transmission interfaces, and Table 16-6 lists thespecifications of the internal transmission interfaces.

Table 16-5 Specifications of the external transmission interfaces of the BSC

Transmission Board orEquipment

Connector Remarks

E1/T1 GEIUA DB44 The GEIUA providesfour E1/T1 ports,which carry 32 E1/T1 links and are usedfor the TDMtransmission on theA interface.

GEIUB DB44 The GEIUB providesfour E1/T1 ports,which carry 32 E1/T1 links and are usedfor the TDMtransmission on theAbis interface.

GEHUB DB44 The GEHUBprovides four E1/T1ports, which carry 32E1/T1 links and areused for the HDLCtransmission on theAbis interface.

GEXUB DB44 The GEXUBprovides four E1/T1ports, which carry 32E1/T1 links and areused for the TDMtransmission andHDLC transmissionon the Abis interface.

GEIUP DB44 The GEIUP providesfour E1/T1 ports,which carry 32 E1/T1 links and are usedfor the TDMtransmission on thePb interface.




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Connector Remarks

GEPUG DB44 The GEPUGprovides four E1/T1ports, which carry 32E1/T1 links and areused for the FRtransmission on theGb interface.

STM-1 GOIUA LC/PC The GOIUAprovides an STM-1port, which carries 63E1 links or 84 T1links. It is used forthe TDMtransmission on theA interface.

GOIUB LC/PC The GOIUBprovides an STM-1port, which carries 63E1 links or 84 T1links. It is used forthe TDMtransmission on theAbis interface.

GOXUB LC/PC The GOXUBprovides an STM-1port, which carries 63E1 links or 84 T1links. It is used forthe TDMtransmission andHDLC transmissionon the Abis interface.

GOIUP LC/PC The GOIUP providesan STM-1 port,which carries 63 E1links or 84 T1 links.It is used for theTDM transmissionon the Pb interface.

FE GFGUA RJ45 The GFGUAprovides eight FEports, which are usedfor the IPtransmission on theA interface.



16-5


Connector Remarks

GFGUB RJ45 The GFGUBprovides eight FEports, which are usedfor the IPtransmission on theAbis interface.

GFGUG RJ45 The GFGUGprovides eight FEports, which are usedfor the IPtransmission on theGb interface.

LAN switch RJ45 The LAN switchprovides 24 FE ports.

GE GFGUA RJ45 The GFGUAprovides two GEelectrical ports,which are used forthe IP transmissionon the A interface.

GFGUB RJ45 The GFGUBprovides two GEelectrical ports,which are used forthe IP transmissionon the Abis interface.

GFGUG RJ45 The GFGUAprovides two GEelectrical ports,which are used forthe IP transmissionon the Gb interface.

GOGUA RJ45 The GOGUAprovides two GEoptical ports, whichare used for the IPtransmission on theA interface.

GOGUB RJ45 The GOGUBprovides two GEoptical ports, whichare used for the IPtransmission on theAbis interface.




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NOTE

As listed in Table 16-5, the LAN switch provides 24 Fast Ethernet (FE) ports. The LMT and M2000 accessthe GBAM through the LAN switch.

Table 16-6 Specifications of the internal transmission interfaces of the BSC


Connector Remarks

E1/T1 GEIUT DB44 The GEIUTprovides four E1/T1ports, which carry32 E1/T1 links andare used for theTDM transmissionon the Aterinterface.

STM-1 GOIUT LC/PC The GOIUTprovides an STM-1port, which carries63 E1 links or 84 T1links. It is used forthe TDMtransmission on theAter interface.

FE GBAM RJ45 The GBAMprovides one FEport.

GE GBAM RJ45 The GBAMprovides two GEports.

GOMU RJ45 The GOMUprovides three GEports.

GSCU RJ45 The GSCU providesten FE ports, whichare used for the GEinterconnectionbetween subracks.

TDM GTNU DB14 TDM high-speedserial port is usedfor the connectionbetween theGTNUs in differentsubracks.



16-7


Connector Remarks

LVDS GGCU RJ45 The GGCUprovides 10 LVDShigh-speed serialports for thetransmission ofclock signalsbetween subracks.

Clock Interfaces of the BSC

Table 16-7 lists the specifications of BSC clock interfaces.

Table 16-7 Specifications of the clock interfaces of the BSC

Port Board Name Connector Remarks

Input port forsynchronized clocksignals

GGCU SMB male connector Receives one 2.048MHz clock signal or2.048 Mbit/s codestream signal

Output port forsynchronized clocksignals

GGCU RJ45 Transmits 8 kHzclock signals to theGSCU

Input port forreference clock

GSCU RJ45 Receives 8 kHzclock signals fromthe GGCU

16.4 BSC Reliability SpecificationsThe reliability specifications of the BSC consist of the system availability in typicalconfiguration, Mean Time Between Failures (MTBF), success rate of the switchover of the activeand standby boards, Mean Time To Repair (MTTR), and entire equipment yearly repair rate.

Table 16-8 describes the reliability specifications of the BSC.

Table 16-8 Reliability specifications of the BSC

Specification Value

System availability in typical configuration ≥ 99.9998%

MTBF 409,387 h

Success rate of the switchover of the active andstandby boards

≥ 99%

MTTR ≤ 1 h




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Specification Value

Entire equipment yearly repair rate 1.0%

16.5 BSC Clock Precision RequirementsThe BSC clock specifications consist of the clock precision, pull-in range, maximum frequencyoffset, and initial maximum frequency offset.

Table 16-9 describes the clock specifications of the BSC.

Table 16-9 Clock specifications of the BSC

Specification Value

Clock precision ±4.6 × 10-6

Pull-in range ±4.6 × 10-6

Maximum frequency offset 2 × 10-8/day

Initial maximum frequency offset 1 × 10-8

16.6 BSC Noise and Safety ComplianceThe noise level and safety requirements of the BSC comprise specifications pertaining to noisecontrol and the requirements that the BSC should meet.

Table 16-10 describes the specifications of the noise and safety compliance of the BSC.

Table 16-10 Specifications of the noise and safety compliance of the BSC

Specification Value

Noise < 7.2 bels (sound power level); The BSC meets the requirementsspecified in ETS 300 753 / ISO 7779

< 65 dBA (sound pressure level); The BSC meets therequirements specified in GR-63-Core / ANSI S1.4-1983

Security The BSC complies with the following specifications:l UL 60950

l EN 60950

l IEC 60825

l GB 4943-2000

16.7 BSC Environment RequirementsThe BSC must comply with the environment requirements in terms of storage, transportation,and operation.



16-9

16.7.1 BSC Storage RequirementsThis describes the requirements related to climate, waterproofing conditions, biologicalenvironment, air purity, and mechanical stress during the BSC storage.

16.7.2 BSC Transportation RequirementsThis describes the requirements for the climate, waterproofing, biological environment, airpurity, and mechanical stress during BSC transportation.

16.7.3 BSC Operating Environment RequirementsThe operating environment requirements of the BSC involve climate, waterproofing, biologicalenvironment, air purity, and mechanical stress.

16.7.1 BSC Storage RequirementsThis describes the requirements related to climate, waterproofing conditions, biologicalenvironment, air purity, and mechanical stress during the BSC storage.

Climatic RequirementsTable 16-11 lists the climatic requirements related to the indoor storage environment of theBSC.

Table 16-11 Climatic requirements (storage)

Specification Value

Temperature -40 to +70

Temperature change rate ≤ 1/min

Relative humidity 10% to 100%

Altitude ≤ 5,000 m

Air pressure 70–106 kPa

Solar radiation ≤ 1,120 W/s2

Thermal radiation ≤ 600 W/s2

Wind speed ≤ 30 m/s

WARNINGTemperature requirement of the KVM: –40°C to +60°C.

Waterproofing RequirementsThe waterproofing requirements related to the indoor storage environment of the BSC are asfollows:

l It should be stored indoors.

l Water should not accumulate on the ground or endanger the packing case.




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l The equipment should be kept away from possible water leakages, such as auto fire-protection device and air conditioner.

If you have to place the equipment outdoors, ensure that:

l The packing case is intact.

l Waterproofing measures are taken appropriately to prevent rainwater from damaging thepacking case.

l Water does not accumulate on the ground or endanger the packing case.

l The packing case is not exposed to direct sunlight.

Biological Environment RequirementsThe biological environment requirements related to the indoor storage environment of the BSCare as follows:

l The environment should not be conducive to the growth of fungus or mildew.

l There should not be rodents, such as rats.

Air Purity RequirementsThe air purity requirements related to the indoor storage environment of the BSC are as follows:

l There should not be explosive, conductive, magneto-conductive, or corrosive dust in theair.

l The density of physically active materials should comply with the requirements listed inTable 16-12.

l The density of chemically active materials should comply with the requirements listed inTable 16-13.

Table 16-12 Requirements for physically active materials (storage)

Physically ActiveMaterial

Unit Density

Suspended dust mg/m3 ≤ 5.00

Falling dust mg/m3.h ≤ 20.0

Sand mg/m3 ≤ 300

NOTE

l Suspended dust: diameter ≤ 75 um

l Falling dust: 75 um ≤ diameter ≤ 150 um

l Sand: 150 μm ≤ diameter ≤ 1000 μm



16-11

Table 16-13 Requirements for chemically active materials (storage)

Chemically ActiveMaterial

Unit Density

SO2 mg/m3 ≤ 0.30

H2S mg/m3 ≤ 0.10

NO2 mg/m3 ≤ 0.50

NH3 mg/m3 ≤ 1.00

Cl2 mg/m3 ≤ 0.10

HCI mg/m3 ≤ 0.10

HF mg/m3 ≤ 0.01

O3 mg/m3 ≤ 0.05

Mechanical Stress RequirementsTable 16-14 lists the mechanical stress requirements related to the indoor storage environmentof the BSC.

Table 16-14 Mechanical stress requirements (storage)

Item Sub Item Specifications

Sinusoidalvibration

Offset ≤ 7.0 mm -

Accelerated speed - ≤ 20.0m/s2

Frequency range 2Hz to 9Hz 9Hz to 200Hz

Unsteady impact Impact responsespectrum II

≤ 250m/s2

Static payload ≤ 5 kPa

NOTE

l Impact response spectrum refers to the maximum acceleration response curve generated by theequipment under specified impact excitation. Impact response spectrum II means that the duration ofsemi-sine impact response spectrum is 6 ms.

l Static payload refers to the capability of the equipment in package to bear the pressure from the top innormal pile-up method.

16.7.2 BSC Transportation RequirementsThis describes the requirements for the climate, waterproofing, biological environment, airpurity, and mechanical stress during BSC transportation.




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Requirements for Climate

Table 16-15 lists the requirements for the climate during BSC transportation.

Table 16-15 Requirements for the climate (transportation)

Item Requirement

Temperature -40 to +70


Relative humidity 5% to 100%



Solar radiation ≤ 1,120 W/s2

Thermal radiation ≤ 600 W/s2


Requirements for Waterproofing

The requirements for the waterproofing during equipment transportation are as follows:

l The packing case should be intact.

l Waterproofing measures should be taken appropriately to prevent rainwater from damagingthe packing case.

l Water should not be accumulated inside the transportation vehicle.

Requirements for Biological Environment

The requirements for the biological environment during equipment transportation are as follows:

l The environment should not be conducive to the growth of fungus or mildew.


Requirements for Air Purity

The requirements for air purity during equipment transportation are as follows:

l There should not be explosive, conductive, magneto-conductive, or corrosive dust in theair.





16-13

Table 16-16 Requirements for physically active materials (transportation)


Unit Density

Suspended dust mg/m3 No requirement

Falling dust mg/m3.h ≤ 3.0

Sand mg/m3 ≤ 100

NOTE

l Suspended dust: diameter ≤ 75 um

l Falling dust: 75 um ≤ diameter ≤ 150 um

l Sand: 150 μm ≤ diameter ≤ 1000 μm

Table 16-17 Requirements for chemically active materials (transportation)


Unit Density

SO2 mg/m3 ≤ 0.30

H2S mg/m3 ≤ 0.10

NO2 mg/m3 ≤ 0.50

NH3 mg/m3 ≤ 1.00

Cl2 mg/m3 ≤ 0.10

HCI mg/m3 ≤ 0.10

HF mg/m3 ≤ 0.01

O3 mg/m3 ≤ 0.05

Requirements for Mechanical StressTable 16-18 lists the requirements for the mechanical stress during the BSC transportation.

Table 16-18 Requirements for the mechanical stress (transportation)


Sinusoidalvibration

Offset ≤ 7.5 mm - -

Acceleratedspeed

- ≤ 20.0 m/s2 ≤ 40.0 m/s2

Frequency range 2-9 Hz 9-200 Hz 200-500 Hz




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Randomvibration

Spectrumdensity ofacceleratedspeed

10 m2/s3 3 m2/s3 1 m2/s3

Frequency range 2-9 Hz 9-200 Hz 200-500 Hz

Unsteadyimpact

Impact responsespectrum II

≤ 300 m/s2

Static payload ≤ 10 kPa

NOTE



16.7.3 BSC Operating Environment RequirementsThe operating environment requirements of the BSC involve climate, waterproofing, biologicalenvironment, air purity, and mechanical stress.

Climatic Requirements

Table 16-20 and Table 16-19 list the requirements for operating the BSC.

Table 16-19 Temperature and humidity requirements

Temperature Relative humidity

Long-term

Short-term Long-term Short-term

0 to+45

-5 to +55 5% to 85% 5% to 95%

NOTE

l The temperature and humidity are measured 1.5 m above the floor and 0.4 m in front of the equipment,without protective panels in front of and behind the cabinet.

l Short-term operation refers to the continuous operations within 96 hours or accumulated operations ofnot more than 15 days a year.

Table 16-20 Other requirements

Item Specifications




16-15

Item Specifications



Solar radiation ≤ 700 W/m2

Thermal radiation ≤ 600 W/m2


Biological Environment Requirements

The working environment of the BSC should meet the following air purity requirements:

l The environment should not be conducive for the growth of fungus or mildew.


Air Purity Requirements

The working environment of the BSC should meet the following air purity requirements:

l There should be no explosive, conductive, magneto-conductive, or corrosive dust in theair.



Table 16-21 Requirements for physically active materials (operating)


Unit Density

Dust particles Particles/m3 ≤ 3×104 (There is no visibledust within three days.)

NOTEDust particles: diameter ≥ 5 μm

Table 16-22 Requirements for chemically active materials (operating)


Unit Density

SO2 mg/m3 ≤ 0.20

H2S mg/m3 ≤ 0.006

NH3 mg/m3 ≤ 0.05

Cl2 mg/m3 ≤ 0.01




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Mechanical Stress RequirementsTable 16-23 describes the mechanical stress requirements for operating the BSC.

Table 16-23 Mechanical Stress Requirements


Sinusoidalvibration

Offset ≤ 3.5 mm -

Acceleratedspeed

- ≤ 10.0m/s2

Frequency range 2 Hz to 9 Hz 9 Hz to 200 Hz

Unsteadyimpact

Impact responsespectrum II

≤ 100 m/s2

Static payload 0

NOTE



16.8 Technical Specifications of BSC PartsThe technical specifications of the BSC parts consist of the specifications of the GBAM, GOMU,power distribution box, and fan box.

16.8.1 Technical Specifications of the GBAMThe technical specifications of the GBAM consist of the hardware configuration specificationsand performance specifications.

16.8.2 Technical Specifications of the GOMUThe hardware configuration and performance specifications of the GOMU consist of thespecifications of dimensions, power supply, power consumption, weight, operating temperature,and operating relative humidity.

16.8.3 Technical Specifications of the BSC Common Power Distribution BoxThe technical specifications of the BSC power distribution box consist of the input specificationsand output specifications.

16.8.4 Technical Specifications of the BSC High-Power Distribution BoxThe technical specifications of the BSC high-power distribution box consist of the inputspecifications and output specifications.

16.8.1 Technical Specifications of the GBAMThe technical specifications of the GBAM consist of the hardware configuration specificationsand performance specifications.

The BSC can be configured with three types of GBAM: IBM X3650T, Huawei C5210, and HPCC3310.



16-17

Hardware Configuration Specifications of the GBAMTable 16-24 lists the hardware configuration specifications of the IBM X3650. Table 16-25lists the hardware configuration specifications of the Huawei C5210. Table 16-26 lists thehardware configuration specifications of the HP CC3310.

Table 16-24 Hardware configuration specifications of the GBAM (IBM X3650T)

Parameter Description

CPU Double-CPU, CPU clock speed: 3.2 GHz

Memory 2 GB

Hard diskcapacity

2 x 146 GB RAID1

Ethernet adapter Four Ethernet adapters are configured:l Two Ethernet adapters are integrated into the main board and work in

active/standby mode.l The other two Ethernet adapters are inserted into the PCI slots and work

in active/standby mode.

Table 16-25 Hardware configuration specifications of the GBAM (Huawei C5210)



Memory 2 GB

Hard diskcapacity

2 x 146 GB RAID1

Ethernet adapter Three or four Ethernet adapters are configured.l Two Ethernet adapters are integrated into the main board and work in

active/standby mode.l The other Ethernet adapter is inserted into a PCI slot and works

independently. Alternatively, the other two Ethernet adapters areinserted into the PCI slots and work in active/standby mode.

Table 16-26 Hardware configuration specifications of the GBAM (HP CC3310)



Memory 2 GB

Hard diskcapacity

2 x 46 G RAID1




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Ethernet adapter Three Ethernet adapters are configured.l Two Ethernet adapters are integrated into the main board and work in

active/standby mode.l The other Ethernet adapter is inserted into a PCI slot and works

independently.

Performance Specifications of the GBAM

Table 16-27 lists the performance specifications of the three types of GBAM.

Table 16-27 Performance specifications of the GBAM


Number of alarms to bestored

A maximum of 300,000 alarm entries can be recorded and exported.

Maximum time forsaving the performancemeasurement resultfiles

The performance measurement result files can be saved for up to15 days.

Time for starting theGBAM

l It takes about two minutes to restart the GBAM after its upgrade.

l It takes about five minutes to restart the GBAM due to its failure.

16.8.2 Technical Specifications of the GOMUThe hardware configuration and performance specifications of the GOMU consist of thespecifications of dimensions, power supply, power consumption, weight, operating temperature,and operating relative humidity.

Table 16-28 lists the hardware configuration specifications of the GOMU.

Table 16-28 Hardware configuration specifications of the GOMU

Specification Value

Dimensions 366.7 mm x 220 mm

Power supply Two routes of –48 V DC with redundancyconfiguration (provided by the backplane of thesubrack)

Power Consumption 90 W

Weight 3.5 kg

Temperature in long-term operation -5 to +40

Temperature in short-term operation 0 to +50



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Specification Value

Relative humidity in long-termoperation

5% to 85% RH

Relative humidity in short-termoperation

5% to 95% RH

Table 16-29 lists the performance specifications of the GOMU.

Table 16-29 Performance specifications of the GOMU

Specification Value

Initial backup time of the GOMU Less than 30 minutesThe initial backup time of the GOMU refers to theinitial time for backing up the script files. Thisparameter is related to the file size and thedifference between the files in the active andstandby GOMUs.

Switchover time between the active andstandby GOMUs

2 to 3 minutesThe switchover time between the active andstandby GOMUs refers to time between theswitchover request is accepted and the switchoveroperation is complete. The switchover time consistsof the following segments:l Switchover negotiation time

l Stopping process time

l Start time of the new active GOMU

16.8.3 Technical Specifications of the BSC Common PowerDistribution Box

The technical specifications of the BSC power distribution box consist of the input specificationsand output specifications.

Table 16-30 describes the technical specifications of the BSC power distribution box.

Table 16-30 Technical specifications of the BSC power distribution box

Item Sub Item Specification

Input specifications Rated input voltage –48 V DC

Input voltage -40 V DC to -57 V DC

Input mode Two –48 V DC inputs




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Maximum input current Two inputs, each of whichhas a maximum input currentof 100 A

Output specifications Rated output voltage –48 V DC

Output voltage -40 V DC to -57 V DC

Independent output Six groups of independentpower output: Each groupconsists of one –48 V outputand one RTN output. Theoutput of current iscontrolled by a switch, whichperforms short-circuitingfunctions. When the totalcurrent of the six groups ofpower output is smaller than100 A, the maximum currentof each power output is 70 A.

Output protectionspecifications

The current at theovercurrent protection pointis 87.5 A. You need to restorethe default value manually.

Rated output power 4,800 W in hot backup mode

16.8.4 Technical Specifications of the BSC High-Power DistributionBox

The technical specifications of the BSC high-power distribution box consist of the inputspecifications and output specifications.

Table 16-31 lists the technical specifications of the BSC high-power distribution box.

Table 16-31 Technical specifications of the BSC high-power distribution box


Inputspecifications

Rated input voltage -48 V DC or -60 V DC

Input voltage -40 V DC to -72 V DC

Input mode Two groups of power inputs: A and B. Group Aconsists of the power inputs A1+A2 and A3. GroupB consists of the power inputs B1+B2 and B3. Eachgroup has one to two -48 V DC/-60 V DC powerinputs.

Maximum inputcurrent

The maximum rated input current of each route is100 A.



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Outputspecifications

Rated output voltage -48 V DC or -60 V DC

Output voltage -40 V DC to -72 V DC

Independent output Two groups of power outputs: A and B. Each grouphas one to three -48 V DC/-60 V DC power outputs.The maximum rated output current of each outputis 50 A and that of each group is 100 A.Each output is controlled by the MCBs: A8-A10and B8-B10. These MCBs provide the overcurrentprotection function.

Output protectionspecifications

The current at the overcurrent protection point is70 A. You need to restore the default valuemanually.

Rated output power 9,600 W (Two groups of power outputs: A and B.Each group has two –48 V DC power outputs.)

NOTEFor group A, power inputs A1+A2 correspond to power outputs A1-A8, and power input A3 correspondsto power outputs A9-A10. Similarly, for group B, power inputs B1+B2 correspond to power outputs B1-B8, and power input B3 corresponds to power outputs B9-B10.




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BSC Product Description(V900R008C11_02)

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