Huawei-BSC Poduct Description(V900R008C11_01)

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HUAWEI BSC6000 Base Station Controller

V900R008C11

BSC Product Description

Issue 01

Date 2008-08-21

Part Number

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Contents

About This Doc ument.....................................................................................................................1

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

2 Functions of t he BSC.................................................................................................................2-1

3 Introduction to the BSC............................................................................................................3-13.1 BS C Physical Structure...................................................................................................................................3-2

3.2 BS C Software Structure..................................................................................................................................3-5

3.3 BSC Logi cal Structure....................................................................................................................................3-7

4 BSC Hardware Configuration..................................................................................................4-14.1 BS C Hardware Configuration.........................................................................................................................4-2

4.2 BSC Hardwar e Configuration Type A............................................................................................................4-5

4.2.1 BM/TC Separated (Configuration Type A)...........................................................................................4-5

4.2.2 BM/TC Combined (Configuration Type A).........................................................................................4-10

4.2.3 A ov er IP (Configuration Type A).......................................................................................................4-13

4.3 BSC Hardwar e Configuration Type B..........................................................................................................4-15

4.3.1 BM/TC Separated (Configuration Type B)..........................................................................................4-15

4.3.2 BM/TC Combined (Configuration Type B).........................................................................................4-20

4.3.3 A ov er IP (Configuration Type B).......................................................................................................4-23

5 BSC TDM Switching Subsystem............................................................................................5-15.1 Physical Structure of the BSC TDM Switching Subsystem...........................................................................5-2

5.2 Logical St ructure of the BSC TDM Switching Subsystem.............................................................................5-3

6 BSC GE Switching Subsystem................................................................................................6-16.1 Physical Structure of the BSC GE Switching Subsystem...............................................................................6-2

6.2 Logical Structure of the BSC GE Switching Subsystem................................................................................6-3

6.3 Fe atures of BSC GE Switching.......................................................................................................................6-4

7 BSC Ser vice Processing Subsystem........................................................................................7-17.1 Ph ysical Structure of the BSC Service Processing Subsystem.......................................................................7-2

7.2 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............................................................................8-2

8.2 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.....................................................................9-2

9.2 Logical Structure of the BSC Interface Processing Subsystem......................................................................9-3

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

10.2 BSC Clo ck Synchronization........................................................................................................................10-2

10.2.1 BSC Clock Synchronization (BM/TC Separated)..............................................................................10-3

10.2.2 BSC Clock Synchronization (BM/TC Combined).............................................................................10-5

10.2.3 BSC C lock Synchronization (A over IP)...........................................................................................10-6

11 BSC Power Sub system..........................................................................................................11-1

12 BSC Environ ment Monitoring Subsystem........................................................................12-112.1 BSC Power Monitoring...............................................................................................................................12-2

12.2 BSC Fan Mo nitoring...................................................................................................................................12-2

12.3 BSC Enviro nment Monitoring....................................................................................................................12-3

13 OM of the BSC. .......................................................................................................................13-113.1 OM Mod es of the BSC................................................................................................................................13-2

13.2 OM Fun ctions of the BSC...........................................................................................................................13-3

13.2.1 BS C Security Management................................................................................................................13-4

13.2.2 BSC Configuration Management.......................................................................................................13-6

13.2.3 BSC P erformance Management.......................................................................................................13-11

13.2.4 BSC A larm Management.................................................................................................................13-11

13.2.5 BSC L oading Management..............................................................................................................13-13

13.2.6 BSC U pgrade Management..............................................................................................................13-16

13.2.7 BTS L oading Management..............................................................................................................13-17

13.2.8 BTS U pgrade Management..............................................................................................................13-17

14 BSC Signal Flo w.....................................................................................................................14-114.1 BSC CS Sig nal Flow...................................................................................................................................14-2

14.2 BSC PS Signal Flow...................................................................................................................................14-5

14.3 BSC Sig naling Flow....................................................................................................................................14-7

14.3.1 Signaling Flow on the Abis Interface.................................................................................................14-8

14.3.2 Sig naling Flow on the A Interface...................................................................................................14-10

14.3.3 Sig naling flow on the Pb interface...................................................................................................14-13

14.3.4 Sig naling Flow on the Gb Interface.................................................................................................14-14

14.4 B SC OM Signal Flow...............................................................................................................................14-15

14.4.1 BSC OM Signal Flow (BM/TC Separated)......................................................................................14-15

14.4.2 BSC OM Signal Flow (BM/TC Combined).....................................................................................14-18

14.4.3 BSC O M Signal Flow (A over IP)...................................................................................................14-18

15 BSC Transmissi on and Networking...................................................................................15-115.1 Transmission and Networking on the Abis Interface..................................................................................15-2

15.2 Transmission and Networking on the A Interface.......................................................................................15-6

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15.3 Transmission and Networking on the Pb Interface.....................................................................................15-9

15.4 Transmission and Networking on the Ater Interface................................................................................15-10

15.5 Transmission and Networking on the Gb Interface...................................................................................15-10

16 BSC Technical Specifications..............................................................................................16-116.1 BSC Capacity Specifications......................................................................................................................16-2

16.2 BSC Engineering Specifications.................................................................................................................16-2

16.3 BSC Physical Interfaces..............................................................................................................................16-4

16.4 BSC Reliability Specifications....................................................................................................................16-9

16.5 BSC Clock Precision Requirements............................................................................................................16-9

16.6 BSC Noise and Safety Compliance...........................................................................................................16-10

16.7 BSC Environment Requirements..............................................................................................................16-10

16.7.1 BSC Storage Requirements..............................................................................................................16-11

16.7.2 BSC Transportation Requirements...................................................................................................16-13

16.7.3 BSC Operating Environment Requirements....................................................................................16-16

16.8 Technical Specifications of BSC Parts......................................................................................................16-18

16.8.1 Technical Specifications of the GBAM...........................................................................................16-19

16.8.2 Technical Specifications of the GOMU...........................................................................................16-21

16.8.3 Technical Specifications of the BSC Common Power Distribution Box.........................................16-22

16.8.4 Technical Specifications of the BSC High-Power Distribution Box...............................................16-23

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Figures

Figure 1-1 Po sition of the BSC in the GSM/GPRS network...............................................................................1-2

Figure 3-1 Ph ysical structure of the BSC.............................................................................................................3-2

Figure 3-2 Fr ont view of the BSC cabinet...........................................................................................................3-4

Figure 3-3 St ructure of the host software.............................................................................................................3-5

Figure 3-4 St ructure of the OMU software..........................................................................................................3-6

Figure 3-5 St ructure of LMT software.................................................................................................................3-6

Figure 3-6 Lo gical structure of the BSC..............................................................................................................3-7

Figure 4-1 OM path between the GMPS and the main GTCS (in local GTCS mode)........................................4-3

Figure 4-2 OM path between the GMPS and the main GTCS (in remote GTCS mode).....................................4-3

Figure 4-3 BSC minimum configuration (GTCS configured on the BSC side)..................................................4-6

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

Figure 4-5 BSC maximum configuration (GTCS configured on the BSC side)..................................................4-7

Figure 4-6 BSC maximum configuration (GTCS configured on the MSC side).................................................4-7

Figure 4-7 BSC maximum configuration (GTCS configured on the BSC side)..................................................4-8Figure 4-8 BSC maximum configuration (GTCS configured on the MSC side).................................................4-8

Figure 4-9 BSC minimum configuration............................................................................................................4-11

Figure 4-10 BSC maximum configuration (E1/T1 transmission used on the A interface)................................4-12

Figure 4-11 BSC maximum configuration (STM-1 transmission used on the A interface)..............................4-12

Figure 4-12 BSC minimum configuration..........................................................................................................4-14

Figure 4-13 BSC maximum configuration.........................................................................................................4-14

Figure 4-14 BSC minimum configuration (GTCS configured locally).............................................................4-16

Figure 4-15 BSC minimum configuration (GTCS configured remotely)..........................................................4-16

Figure 4-16 BSC maximum configuration (GTCS configured locally).............................................................4-17

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

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

Figure 4-19 BSC maximum configuration (GTCS configured remotely)..........................................................4-18


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

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


Figure 4-24 BSC maximum configuration.........................................................................................................4-24

Figure 5-1 TDM interconnections between GMPS and GEPS............................................................................5-2

Figure 5-2 TDM interconnections between GTCSs.............................................................................................5-2

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Figure 5-3 Intra-subrack TDM interconnections..................................................................................................5-3

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

Figure 6-1 GE interconnection between the GMPS and the GEPS......................................................................6-2

Figure 6-2 GE interconnection between the GTCSs............................................................................................6-2

Figure 6-3 Intra-subrack GE interconnection.......................................................................................................6-3

Figure 6-4 Lo gical structure of the BSC GE switching subsystem......................................................................6-4

Figure 7-1 Ph ysical structure of the BSC service processing subsystem (1).......................................................7-2




Figure 7-5 Lo gical structure of the CS service processing subsystem.................................................................7-5

Figure 7-6 Lo gical structure of the PS service processing subsystem................................................................. 7-5

Figure 9-1 Ph ysical structure of the BSC interface processing subsystem..........................................................9-2

Figure 9-2 BSC interfaces....................................................................................................................................9-3Figure 10-1 Clock synchronization in the GMPS/GEPS (BITS clock source)..................................................10-3

Figure 10-2 Clock synchronization in the GMPS/GEPS (line clock source).....................................................10-4

Figure 10-3 Clock synchronization in the GTCS...............................................................................................10-4

Figure 10-4 BSC clock synchronization procedure (BITS clock source)..........................................................10-5

Figure 10-5 BSC clock synchronization procedure (line clock source).............................................................10-6

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

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

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

Figure 12-1 Principle of power monitoring........................................................................................................12-2Figure 12-2 Principle of fan monitoring.............................................................................................................12-3

Figure 12-3 Principle of environment monitoring.............................................................................................12-3

Figure 13-1 Network topology of the BSC OM (in BSC hardware configuration type A)...............................13-2

Figure 13-2 Network topology of the BSC OM (in BSC hardware configuration type B)................................13-3

Figure 13-3 Principle of the offline data configuration......................................................................................13-7

Figure 13-4 Principle of the online data configuration......................................................................................13-8

Figure 13-5 Procedure of the BSC data consistency check..............................................................................13-10

Figure 13-6 BSC data synchronization procedure ...........................................................................................13-10

Figure 13-7 BSC performance management process.......................................................................................13-11

Figure 13-8 A larm management process of the BSC.......................................................................................13-12

Figure 13-9 Working principle of the alarm box .............................................................................................13-13

Figure 13-10 BSC loading process (1).............................................................................................................13-14



Figure 14-1 CS signal flow (1)...........................................................................................................................14-2





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Figure 15-20 E1/T1-based FR networking on the Gb interface.......................................................................15-11

Figure 15-21 FE/GE-based IP networking on the Gb interface.......................................................................15-11

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Tables

Table 1-1 Fun ctions of each NE in the GSM/GPRS network..............................................................................1-2

Table 3-1 Co mponents of the BSC.......................................................................................................................3-2

Table 3-2 Co mponents in the BSC Cabinet..........................................................................................................3-4

Table 4-1 Re commended configuration of the BSC............................................................................................ 4-9

Table 4-2 Re commended configuration of the BSC..........................................................................................4-12





Table 9-1 Phy sical entities of the BSC interface processing subsystem..............................................................9-2

Table 13-1 Definitions of the BSC user authorities...........................................................................................13-4

Table 13-2 BSC logs...........................................................................................................................................13-5

Table 16-1 Capacity specification of the BSC...................................................................................................16-2

Table 16-2 St ructural specifications...................................................................................................................16-3Table 16-3 Po wer consumption specifications...................................................................................................16-3

Table 16-4 Po wer supply and EMC specifications of the BSC..........................................................................16-3

Table 16-5 Sp ecifications of the external transmission interfaces of the BSC...................................................16-4

Table 16-6 Sp ecifications of the internal transmission interfaces of the BSC...................................................16-7

Table 16-7 Sp ecifications of the clock interfaces of the BSC............................................................................16-9

Table 16-8 R eliability specifications of the BSC...............................................................................................16-9

Table 16-9 Clock specifications of the BSC....................................................................................................16-10

Table 16-10 S pecifications of the noise and safety compliance of the BSC ...................................................16-10

Table 16-11 Climatic requirements (storage)...................................................................................................16-11

Table 16-12 Requirements for physically active materials (storage)...............................................................16-12

Table 16-13 Requirements for chemically active materials (storage)..............................................................16-12

Table 16-14 Mechanical stress requirements (storage)....................................................................................16-13

Table 16-15 Requirements for the climate (transportation).............................................................................16-14

Table 16-16 Requirements for physically active materials (transportation)....................................................16-15

Table 16-17 Requirements for chemically active materials (transportation)...................................................16-15

Table 16-18 Requirements for the mechanical stress (transportation).............................................................16-15

Table 16-19 Temperature and humidity requirements.....................................................................................16-16

Table 16-20 Other requirements.......................................................................................................................16-17

Table 16-21 Requirements for physically active materials (operating)............................................................16-17

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Table 16-22 Requirements for chemically active materials (operating)..........................................................16-17

Table 16-23 Mechanical Stress Requirements.................................................................................................16-18

Table 16-24 Hardware configuration specifications of the GBAM (IBM X3650T)........................................16-19

Table 16-25 Hardware configuration specifications of the GBAM (Huawei C5210)......................................16-19

Table 16-26 Hardware configuration specifications of the GBAM (HP CC3310)..........................................16-20

Table 16-27 Performance specifications of the GBAM...................................................................................16-20

Table 16-28 Hardware configuration specifications of the GOMU.................................................................16-21

Table 16-29 Performance specifications of the GOMU...................................................................................16-21

Table 16-30 Technical specifications of the BSC power distribution box.......................................................16-22

Table 16-31 Technical specifications of the BSC high-power distribution box..............................................16-23

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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 an d 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 engineersl Field engineers

Change HistoryFor changes in the document, refer to Changes in BSC Product Description.

Organization1 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.

2 Functions of the BSC

The BSC mainly performs the following functions: radio resource management, connectionmanagement, and BTS management.

3 Introduction to the BSC

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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 two

types 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.

5 BSC TDM Switching Subsystem

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

6 BSC GE S witching Subsyste m

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 SubsystemThe BSC serv ice processing subsystem performs voice codin g/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 assign ment, 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 inte rface and signaling process ing subsystem processes the signaling on the BSCinterfaces.

10 BSC Clock Subsystem

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

11 BSC Power Subsystem

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

and the power distribution part.12 BSC Environment Monitoring Subsystem

The BSC env ironment monitoring subsystem compri ses 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 th e BSC

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

14 BSC Signal Flow

The BSC sig nal flow consists of the CS service si gnal flow, PS service signal flow, signalingflow, and OM signal flow.

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15 BSC Transmission and Networking

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

16 BSC Technical Specifications

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

Conventions

1. Symbol Conventions

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

Symbol Description

DANGER

Indicates a hazard with a high level of risk that, if not avoided,will result in death or serious injury.

WARNING

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

CAUTION

Indicates a potentially hazardous situation that, if not avoided,could cause equipment damage, data loss, and performancedegradation, or unexpected results.

TIP Indicates a tip that may help you solve a problem or save your time.

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

2. General Conventions

Convention Description

Times New Roman Normal paragraphs are in Times New Roman.

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

Italic Book titles are in italics .

Courier New Terminal display is in Courier New.

3. Command Conventions


Boldface The keywords of a command line are in boldface .

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Italic Command arguments are in italic .

[ ] Items (keywords or arguments) in square brackets [ ] are optional.{x | y | ...} Alternative items are grouped in braces and separated by vertical

bars.One is selected.

[ x | y | ... ] Optional alternative items are grouped in square brackets andseparated by vertical bars.One or none is selected.

{ x | y | ... } * Alternative items are grouped in braces and separated by vertical bars.A minimum of one or a maximum of all can be selected.

[ x | y | ... ] * Alternative items are grouped in braces and separated by vertical bars.A minimum of zero or a maximum of all can be selected.

4. GUI Conventions


Boldface Buttons,menus,parameters,tabs,window,and dialog titles are inboldface . For example,click OK .

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

5. Keyboard Operation


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

Key1+Key2 Press the keys concurrently.For example,pressing Ctrl+Alt+Ameans the three keys should be pressed concurrently.

Key1,Key2 Press the keys in turn.For example,pressing Alt,A means the twokeys should be pressed in turn.

6. Mouse Operation

Action Description

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

Double-click Press the primary mouse button twice continuously and quicklywithout moving the pointer.

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

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1 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 Network

Figure 1-1 shows the position of the BSC in the GSM/GPRS network.

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Figure 1-1 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 station

controller

PCU: packet control unit SGSN: serving GPRS

support nodeAUC: authentication center HLR: home location

register MSC: mobile serviceswitching center

VLR: visitor locationregister

ISDN: integrated servicesdigital network

PSTN: public switchedtelephone network

NOTE

As shown in Figure 1-1 , 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 1-1 describes the functions of each NE in the GSM/GPRS network.

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

NE Description of Functions

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

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

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NE Description of Functions

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.

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2 Functions of the BSCThe BSC mainly performs the following functions: radio resource management, connectionmanagement, and BTS management.

Radio Resource Management

Radio resource management (RRM) is the procedure through which a stable connection isestablished between the MS and the MSC for a call. This procedure is also used to release theradio resources when a call is disconnected. RRM involves the following aspects: paging,assignment, initial access and immediate assignment, authentication and encryption, systeminformation transmission, handover, radio channel management, power control, circuitmanagement, TRX management, media access control, and radio link control.

Connection ManagementThe purpose of connection management is to provide service control and management.Connection management involves the following aspects: call management, short messagemanagement, voice coding/decoding and rate matching, and packet data forwarding and

processing.

BTS ManagementBTS management involves the following aspects: BTS software downloading, BTS dataconfiguration, BTS status management, and BTS alarm query.

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3 Introduction to the BSCAbout 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 Soft ware StructureThe software of the BSC has a distributed architecture. It is classified into the host software,OMU softwa re, and LMT software.

3.3 BSC Log ical StructureLogically, th e BSC system consists of th e time division multiplexing (TDM) switchingsubsystem, G igabit Ethernet (GE) switching subsystem, service processing subsystem, servicecontrol subsy stem, interface processing subsystem, clock subsystem, power subsystem, andenvironment monitoring subsystem.

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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 portcable

Ethernetcable

Ethernetcable

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

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Component Description Refer to...

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

BSC Cables

BSC LMT The LMT is a computer that isinstalled with the LMT software

package 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 Cabinet

Figure 3-2 shows the front view of the BSC cabinet.



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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)

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

Configuration of the GEPS




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BSCSubrack

Description Refer to...

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

Configuration of the GTCS

Power distribution 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 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 3-3 shows the structure of the host software.

Figure 3-3 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



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Different boards are configured with different types of application software. Theapplication software is classified into radio resource processing software, resource control

plane 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 3-4 shows the structure of theOMU software.

Figure 3-4 Structure of the OMU software

OMU software

Middleware

Operating system

l Operating system

The OMU software runs on the Linux operating system.l Middleware

The DOPRA middleware ensures that the upper-level application software is independentof the lower-level operating system. Thus, the middleware enables software functions to

be transplanted between different platforms.l Application software

The application software performs the functions of different logical entities in the GBAM/GOMU.

LMT Software

The LMT software, which consists of the operating system and application software, runs on

the LMT computer. Figure 3-5 shows the structure of the LMT software.

Figure 3-5 Structure of LMT software

Operating system

Application software

l Operating system

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




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l Application software

The 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, Local

Maintenance 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, which

provides MML commands for the users. Both of them support the maintenance and data configurationof the BSC and the BTSs connected to the BSC.

3.3 BSC Logical StructureLogically, the BSC system consists of the time division multiplexing (TDM) switchingsubsystem, Gigabit Ethernet (GE) switching subsystem, service processing subsystem, service

control subsystem, interface processing subsystem, clock subsystem, power subsystem, andenvironment monitoring subsystem.

Figure 3-6 shows the logical structure of the BSC.

Figure 3-6 Logical structure of the BSC

Serviceprocessingsubsystem

Servicecontrol

subsystem

Interface processingsubsystem

Environmentmonitoringsubsystem

GBAM/GOMU

LMT/M2000

To BTSTo PCU/SGSN

To MSC/MGW

TDMswitching

subsystem

GEswitching

subsystem

Clocksubsystem

Powersubsystem

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.



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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.




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4 BSC Hardware ConfigurationAbout 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 Har dware 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 hardware

configuration .4.2 BSC Har dware Configuration Type AThe BSC hardware configuration type A refers to the BSC configured with the GBAM, whichenables the c ommunication between the BSC and the LMT. The number of BSC cabinets andBSC subrack s varies with the capacity requirements for the BSC.

4.3 BSC Har dware 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 Controller BSC Product Description 4 BSC Hardware Configuration


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4.1 BSC Hardware Configuration

This 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 clas sified 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 remote

configuration 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

G

SCU

GBAM/GOMU

Main GTCS

GSCU

Extension GTCS

GSCU

Serviceboard

Serviceboard

Serviceboard

OM information

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

OM informationGBAM/GOMU

GSCU

Extension GTCS

Serviceboard

GMPS

GSCU

GEIUT

Serviceboard

GSCU

GEIUT

Serviceboard

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 distance between 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 should

be 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.

Configuration Modes of BSC Subracks

The BSC subracks support the following configuration modes:



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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 or GEPS. 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 processing

functions. 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 the

protocol 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-in

PCU or the external PCU.

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.




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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 GOMU

should 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 Hardwar e Configuration Type AThe BSC har dware configuration type A refers to the BSC configured with the GBAM, whichenables the c ommunication between the BSC and the LMT. The number of BSC cabinets andBSC subrack s 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 a re configured in different subracks. The following describes the maximum,minimum, an d 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, and

recommended 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.

Minimum Configuration

In the minimum configuration, the BSC is configured with one GMPS, one GTCS, and one

GIMS. In this case, the BSC supports 512 TRXs. The number of cabinets to be configured varieswith the location of the GTCS.



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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 Configuration

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




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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.

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 .



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

GBCR

GEPS

GMPS

GIMS

GBSR

GTCS

GEPS

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 Configuration

Table 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

GTCS

Configuredon the BSCSide

GTCS

Configured onthe MSC Side

1GMPS+1GTCS+GIMS

1 2 512 The E1/T1 or STM-1transmission isused on the Abis/Ater interface. TheE1/T1transmission isused on the A

interface.1GMPS+1GTCS+GIMS

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

1xGMPS+1xGEPS+GIMS+2xGTCS

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

1xGMPS+1xGEPS+GIMS+1xGTCS

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



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Figure 4-9 BSC minimum configuration

GBCR

Empty

GMPS

GIMS

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 inte rface, the BS C in the minimum configuration

supports 384 TRXs.

Maximum ConfigurationThe maximum configuration of the BSC is achieved through capacity expansion from its

minimum 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 .



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

GBSR

Empty

GEPS

GEPS

GBCR

GEPS

GMPS

GIMS

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

GBSR

Empty

Empty

GEPS

GBCR

GEPS

GMPS

GIMS

Recommended ConfigurationTable 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.




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Number ofTRXs

Remarks

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.

1GMPS+1GEPS+1GIMS

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.

1GMPS+1GEPS+1GIMS

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.

1GMPS+2GEPS+1GIMS

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.

1GMPS+2GEPS+1GIMS

2 2,048 The E1/T1, STM-1, or FE/GE transmission is used on

the Abis interface. TheSTM-1 transmission is usedon the A interface.

1GMPS+3GEPS+1GIMS

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 .



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Figure 4-12 BSC minimum configuration

GBCR

Empty

GMPS

GIMS

Maximum ConfigurationThe 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






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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.

1GMPS+1GEPS+1GIMS

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

1GMPS+2GEPS+1GIMS

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

4.3 BSC Hardware Configuration Type BIn BSC hard ware configuration type B, the BSC is configured with the GOMU, which enablesthe communi cation between the BSC and the LMT. The number of BSC cabinets and BSCsubracks vari es 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.



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Minimum Configuration

In 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

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

GBCR

Empty

Empty

GMPS

GBSR

Empty

Empty

GTCS

Maximum Configuration

The 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. In

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




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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 configuratio n (GTCS configured locally)

GBCR GBSR GBSR

GEPS

GEPS

GMPS

GTCS

GTCS

GEPS

Empty

GTCS

GTCS

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 4-1 9.



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

GBCR GBSR

GEPS

GEPS

GMPS

Empty

GTCS

GTCS

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

GBCR GBSR

GEPS

GEPS

GMPS

Empty

GTCS

GTCS






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Configuration


Remarks

GTCS

ConfiguredLocally

GTCS

ConfiguredRemotely

1 x GMPS +1 x GTCS

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

1 x GMPS +1 x GEPS +2 x GTCS

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


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



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Configuration


Remarks

GTCSConfiguredLocally

GTCSConfiguredRemotely


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


2 2 2,048 The E1/T1 or STM-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

Huawei-BSC Poduct Description(V900R008C11_01)

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