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2-1BSC Functional PresentationPE/TRD/CN/4021 12.04/EN October, 2000

Section 2

BSC Functional Presentation

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2-2BSC Functional PresentationPE/TRD/CN/4021 12.04/EN October, 2000

After this section you will be able to:

Locate the BSC in the GSM Network

List the main functions of the BSC

List the different protocols used in the BSS

Objectives

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2-3BSC Functional PresentationPE/TRD/CN/4021 12.04/EN October, 2000

Contents

BSC in the GSM Network

What Does the BSC Perform?

Signaling in the BSS

BSC Architecture

BSC 12000 Complete Architecture

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2-4BSC Functional PresentationPE/TRD/CN/4021 12.04/EN October, 2000

BSC in the GSM Network

TCU

BSCOMC-R

MSC RadioInterfaceA Interface

Ater Interface

Abis Interface

NSS

BSS

OMN Interface

Public Telephone Network

MS

MS

S2000H&LBTS

S8000IndoorBTS

S8000Outdoor

BTS

Sun

StorEdgeA5000

RadioInterface

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2-5BSC Functional PresentationPE/TRD/CN/4021 12.04/EN October, 2000

RadioResources

Management

Routing

Terrestrial Resources Management

MSCBTS

BTS

BTS

BTS

CAUTION: CRASHON E12 HIGHWAY

What Does the BSC Perform?

1 - Basic Functions

Traffic Concentration SMS-CBManagement

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2-6BSC Functional PresentationPE/TRD/CN/4021 12.04/EN October, 2000

BSC Backup

Control andSwitching

Chain BPassive

Control andSwitching

Chain AActive

Data +

Software

OMC-R Interface Management

What Does the BSC Perform?

2 - O&M Functions

Observation

BTS and TCU Management

Supervision

Shut down

Startup

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2-7BSC Functional PresentationPE/TRD/CN/4021 12.04/EN October, 2000

Signaling in the BSS

MSC BSC BTS

OMC-R

TCU

X.25

LAPD

RSL

LAPD

OML

LAPD

OML

SS7

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2-8BSC Functional PresentationPE/TRD/CN/4021 12.04/EN October, 2000

BSS management Traffic management

X.25 LAPD SS7

PCM interface, switching matrix, rate adaptation

BSCsupervision

and

defense

Physical layer

Protocol layer

Application layer

BSC Architecture

BSC Block Diagram

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2-9BSC Functional PresentationPE/TRD/CN/4021 12.04/EN October, 2000

BSC 12000 Complete Architecture

To/From OMC-R

O&M/A bus O&M/B bus

To/From TCU/MSCTo/From BTS

CONTROL

EQUIP

MENT

External Loops

Inter SUP

Ethernet

MPU

Status

Internal PCM/A Internal PCM/B

SLSMMU

ECI A

MPUA

Chain A

CPU-

MPU

SUP

SICX

CPU-

BIFP

CCS7

CPU-

OMU

V11 64 kb/s

Multibus II

SLS

MPUB

Chain B

CPU-

BIFP

CCS7

V11 64 kb/s

Multibus II

MPU

Status

MPU

Status

MPU

Status

RCB

SICD8V

RCB

SICD8V SICX

SWC

MSW-SWE

CPU-

MPU

MMU

CPU-

OMU

SWC

MSW-SWE

ECI B

SUP

DDTIALA BSCBTSCB

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2-10BSC Functional PresentationPE/TRD/CN/4021 12.04/EN October, 2000