BSC 6900 Training

www.huawei.com

Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.

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BSC6900 GSM V900R013

Product Description


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Foreword

The BSC6900 is an important network element (NE) of

Huawei Single RAN solution. It adopts the industry-leading

multiple radio access technologies, IP transmission mode,

and modular design. It features high capacity, high

integration, excellent performance, and low power

consumption.

The BSC6900 can be flexibly configured as a BSC6900

GSM only, BSC6900 UMTS only, or BSC6900 GU as

required in different networks


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References

BSC6900 GSM Product Description

BSC6900 GSM Technical Description

BSC6900 GSM Hardware Description


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Upon completion of this course, you will be able to:

Detail the functions of the components of BSC6900

Detail the hardware structure of BSC6900

Detail the signal flows in BSC6900

List the typical hardware configuration of BSC6900

Objectives


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Contents

1. BSC6900 System Overview

2. BSC6900 Hardware Architecture

3. BSC6900 Signal Flows

4. BSC6900 Typical Configuration


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BSC6900 Position in UMTS/GSM

BSC6900 GU

BSC6900 GU

NodeB

BTS

MBTS

CS

PS

UE/MS UTRAN/GBSS CN

Uu/Um Iu/A/Gb

Iu-CS/A

Iu-PS/Gb

Iur

Iub

Iub/Abis


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Capacity

ITEM

Specification

System Capacity (Boards

Supported by BSC6900

V900R012)

System Capacity (Boards

Supported by BSC6900

V900R013)

GSM network

Traffic (Erl) 24,000 Same

Number of cells 2,048 Same

Number of TRXs 4096 Same

Maximum number of PDCHs

to be configured 30,720 Same

Maximum number of

activated PDCHs (MCS-9) 16,384 Same

Gb interface throughput

(Mbit/s) 1,536 Same

*A multi-core board DPUf is added in the TC subrack. In BM/TC combined and all-

TDM mode, the number of subracks is reduced from 1MPS+3EPS to 1MPS+2EPS.


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Flexible Topologies and Smooth Evolution

The BSC6900 can be flexibly configured as a BSC6900 GSM,

BSC6900 UMTS, or BSC6900 GU; therefore, it is applicable to

various networking scenarios.

The BSC6900 can be configured as one of the three variants,

therefore facilitating the smooth evolution between GSM,

GSM&UMTS, and UMTS.


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High Integration and Capacity of

GSM Dual Switching Planes (IP+TDM)

The IP plane supports a maximum of 240 Gbit/s switching capacity.

The TDM plane supports a maximum of 128K×128K switching

capacity.

A maximum of 16,384 active PDCHs are supported.

Maximum traffic: 24,000 Erl

Comprehensive BHCA: 5,900,000

Gb throughput: 1,536 Mbit/s


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Features

Supporting GSM/UMTS dual-mode network and the all-IP

platform

Supporting dynamic data configuration and smooth expansion

of the system capacity

Supporting different types of clock sources

Line clock, BITS, GPS, external 8 kHz clock

Supporting star, chain, and tree networking with NodeBs and

BTSs

Supporting E1/T1, STM-1, FE and GE transmission


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Flexible Hardware Configuration

GSM have three kinds of Hardware Configuration

BM/TC separated mode

BM/TC combined mode

A over IP mode


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Smooth evolution from BSC to RNC with software upgrade

Reducing CAPEX by reusing hardware

Dynamic capacity adjustment between 2G&3G

Dual Mode Designs

GSM&UMTS Co-cabinet

Software

Upgrade RNC

RNC

BSC

BSC

BSC

RNC

RNC

RNC

BSC

GSM&UMTS Cabinet


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Feature of BSC6900-Co OAM

Unified CME:

Simultaneous 2G/3G data

configuration, correctness,

and efficiency guaranteed

Unified WEB LMT for maintenance:

Easy and visual maintenance of

2G/3G systems


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Contents


2. BSC6900 Hardware Structure




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Contents


2.1 Cabinets

2.2 Subracks

2.3 Subsystems and Boards


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BSC6900 Cabinet

The BSC6900 uses the standard N68E-22 cabinet

The N68E-22 cabinet is of

two types, the single-door

cabinet and the double-door

cabinet

600

mm

2200 mm

800

mm 600

mm

2200 mm

800

mm

N68E-22 Cabinet (Single-door/Double-

door)


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Components of the Cabinet

Based on functions, cabinets

are classified into the

following types:

MPR: main processing rack

EPR: extended processing rack

TCR: transcoder rack

(1) Air inlet (2) Subrack

(3) Air defense

frame

(4) Power

distribution box

(5) Cable rack in

the cabinet

(6) Rear cable

trough


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Main Processing Rack (MPR)

1 EPS

0 MPS

2 EPS

Power distribution box

MPR

Only one MPR is configured in the

BSC6900.

Components of the cabinet:

Main processing subrack (MPS)

Extended processing subrack (EPS)

Power consumption of a GSM MPS ≤

1200 W

Power consumption of a GSM EPS ≤

1200 W


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Extended Processing Rack(EPR)

4 EPS

3 EPS

5 EPS


EPR

A BSC6900 can be configured with one

EPR or no EPR.


Extended processing subrack (EPS)

Power consumption of a GSM EPS ≤

1200 W


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TransCoder Rack (TCR)

A BSC6900 can be configured with 0

to 2 TCRs.


Transcoder subrack (TCS)

Power consumption of a GSM TCS≤

1000 W

7 TCS

6 TCS

8 TCS


TCR


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Contents


2.1 Cabinets

2.2 Subracks



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Subrack

500 mm

436 mm

12 U

(1) Fan box (2) Mounting ear (3) Guide rail

(4) Front cable trough (5) Board (6) Ground screw

(7) DC power input port (8) Monitoring signal input port for

the power distribution box

(9) DIP switch


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DIP Switch on the Subrack

Subrack No. Bit

1 2 3 4 5 6 7 8

0 0 0 0 0 0

ON ON OFF ON ON ON ON ON

1 1 0 0 0 0

OFF ON OFF OFF ON ON ON ON

2 0 1 0 0 0

OFF ON OFF ON OFF ON ON ON

3 1 1 0 0 0

ON ON OFF OFF OFF ON ON ON

4 0 0 1 0 0

OFF ON OFF ON ON OFF ON ON

5 1 0 1 0 0

ON ON OFF OFF ON OFF ON ON

The DIP switch on the subrack consists of eight bits from bit 1 to bit 8.


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Slots in the Subrack

(1) Front slot (2) Backplane (3) Rear slot

The boards are installed on both the front and rear sides of the

backplane, which is located in the middle of the subrack.


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GSM MPS (in BM/TC Separated Mode)

Only one MPS is configured in the BSC6900.

I

N

T

I

N

T

I

N

T

I

N

T

I

N

T

I

N

T

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Backplane

X

P

U

X

P

U

X

P

U

X

P

U

T

N

U

a

T

N

U

a

S

C

U

a

S

C

U

a

D

P

U

g

D

P

U

g

G

C

U

a

G

C

U

a

0 1 1312111098765432

O

M

U

c

O

M

U

c

Front panel

Rear panel


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GSM EPS (in BM/TC Separated Mode)

Front panel

Rear panel

INT

INT

INT

INT

INT

INT

INT

INT

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Backplane

XPU

XPU

XPU

XPU

TNUa

TNUa

SCUa

SCUa

DPUg

DPUg

DPUg

0 1 1312111098765432

A BSC6900 GSM can be configured with 0 to 3 EPSs.


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GSM MPS (in BM/TC Combined Mode)


I

N

T

I

N

T

I

N

T

I

N

T

I

N

T

I

N

T

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Backplane

X

P

U

X

P

U

X

P

U

X

P

U

T

N

U

a

T

N

U

a

S

C

U

a

S

C

U

a

D

P

U

g

D

P

U

g

G

C

U

a

G

C

U

a

0 1 1312111098765432

D

P

U

f

D

P

U

f

O

M

U

c

O

M

U

c

Front panel

Rear panel


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GSM EPS (in BM/TC Combined Mode)

Front panel

Rear panel INT

INT

INT

INT

INT

INT

INT

INT

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Backplane

XPU

XPU

XPU

XPU

TNUa

TNUa

SCUa

SCUa

DPUg

DPUg

DPUg

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INT

INT

INT

INT

DPUf

DPUf

DPUf

DPUf

DPUf



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GSM MPS (in A over IP Mode)


I

N

T

I

N

T

I

N

T

I

N

T

I

N

T

I

N

T

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Backplane

X

P

U

X

P

U

X

P

U

X

P

U

T

N

U

a

T

N

U

a

S

C

U

a

S

C

U

a

D

P

U

g

D

P

U

g

G

C

U

a

G

C

U

a

0 1 1312111098765432

D

P

U

f

D

P

U

f

O

M

U

c

O

M

U

c

Front panel

Rear panel


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GSM EPS (in A over IP Mode)

Front panel

Rear panel

INT

INT

INT

INT

INT

INT

INT

INT

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Backplane

XPU

XPU

XPU

XPU

TNUa

TNUa

SCUa

SCUa

DPUg

DPUg

DPUg

0 1 1312111098765432

DPUf

DPUf

DPUf



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Transcoder Subrack (TCS)

Front panel

Rear panel

INT

INT

INT

INT

INT

INT

INT

INT

INT

INT

INT

INT

INT

INT

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Backplane

TNUa

TNUa

SCUa

SCUa

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DPUf(opt)

DPUf(opt)

DPUf(opt)

DPUf(opt)

DPUf(opt)

A BSC6900 GSM can be configured with a maximum of four TCSs.


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Contents


2.1 Cabinets

2.2 Subracks


2.4 Cables


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BSC6900 Logical Structure

LMT/M2000

Clock

synchronization

subsystem

Switching

subsystem

Interface

processing

subsystem

Service

processing

subsystem

OM subsystem

To BTS/NodeB

To MSC

To other BSCs/RNCs

To SGSN

Clock (optional)


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Switching Subsystem

The switching subsystem performs the following functions:

Provides data and signaling switching

Intra-subrack Media Access Control (MAC) switching

Intra-subrack Time Division Multiplexing (TDM) switching

Inter-subrack MAC and TDM switching

Provides OM channels

Distributes clock signals to each service board


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Network Topologies Between

Subracks MAC switching - star topology

One node functions as the center node and it is connected to each

of the other nodes. The communication between the other nodes

must be switched by the center node.

TDM switching - mesh topology

There is a connection between every two nodes. When any node

is out of service, the communication between other nodes is not

affected.


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Structure of the MAC switching subsystem

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Switching Subsystem

High-speed backplane channel

Ethernet cable

Switching

and

control

unit

Another

board

Another

board

Switching

and

control

unit

Switching

and

control

unit

Another

board

Another

board

Another

board

Another

board MPS

TCS

EPS


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Switching Subsystem

Inter-subrack cable for MAC switching

SCU

SCU

SCU

SCU

SCU

SCU

EPS

EPS

MPS


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SCUa Board

Functions

Provides the maintenance management function

Monitors the power supply, fans, and environment of the

cabinet

Supports the port trunking function

Provides configuration and maintenance of a subrack or the

whole BSC

Provides a total switching capacity of 60 Gbit/s

Distributes clock signals and RFN signals for the BSC6900

Working mode

Located in slots 6 and 7

Working in dual-plane mesh topology


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SCUb Board

Functions

Provides the maintenance management function

Monitors the power supply, fans, and environment of the

cabinet

Supports the port trunking function

Provides configuration and maintenance of a subrack or the

whole BSC

Provides a total switching capacity of 240 Gbit/s

Distributes clock signals and RFN signals for the BSC6900

Working mode

Located in slots 6 and 7

Working in dual-plane mesh topology


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Inter-Subrack Connections

Inter-Subrack SCUa

Interconnection Ethernet Cable

EPS

MPS

SCUa

(Active)

SCUa

(Active)

SCUa

(Standby)

SCUa

(Standby)


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Interconnections Between SCUb

Boards Inter-subrack cable

connections between

SCUb boards by using

SFP+ high-speed cables

(MPR/EPR in full

configuration, remote

TC configuration)

Blue lines indicate the

SFP+ high-speed

cables.

Page45


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Interconnections Between SCUb

Boards Inter-subrack cable

connections between

SCUb boards by using

SFP+ high-speed cables

(Local TC configuration)

Blue lines indicate the

SFP+ high-speed cables.

Green lines indicate the

unshielded straight-

through cables.

Page46


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Switching Subsystem

Structure of the TDM switching subsystem

MPS

TDM

switching

unit

Another board

.

.

.

Another board

EPS

TDM

switching

unit

Another board

.

.

.

Another board

EPS

TDM

switching

unit

Another board

.

.

.

Another board

High-speed backplane channel

TNU crossover cable


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TNUa Board

Functions

Provides 128 k * 128 k TDM switching

Allocates the TDM network resources

Supports only GSM


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TNUa Board

Inter-TNUa crossover

cables

between subracks


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Service Processing Subsystem

The service processing subsystem performs the following

functions:

User data and signaling processing

Radio channel ciphering and deciphering

Radio resource management and control

System information and user message tracing


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Service Processing Subsystem

High-speed backplane

channel

signaling

processing unit

MPS EPS

signaling

processing unit

MPS

SPU 0

SPU 7

processing unit

MPS

SPU 0

SPU 7

Switching Subsystem

DSP 0

DSP 21

DSP 0

DSP 21

Signaling

processing unit

Signaling

processing unit

Data processing

unit

Data processing

unit

MPS EPS


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XPUa Board The XPUa board has four logic subsystems

Main Control XPUa board (MPU)

Subsystem 0 of the main control XPUa

board is the Main Processing Unit (MPU). It

is used to manage the user plane resources,

control plane resources, and transmission

resources of the system.

Non-Main Control XPUa Board (SPU)

Subsystems 1 to 3 of the main control XPUa

board belong to the CPU for Service (CPUS),

which is used to process the services on the

control plane.

Work mode: active and standby

Page52

signaling

SSN0 MPU

SSN3 SPU

signaling

SSN0 SPU

SSN3 SPU

SSN2 SPU

SSN1 SPU

SSN2 SPU

SSN1 SPU

Main control

XPUa

Non-main control

XPUa


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XPUb Board The XPUb board has eight logical subsystems.

Main Control XPUb Board (MPU)

Subsystem 0 of the main control XPUb board

is the Main Processing Unit (MPU). It is used

to manage the user plane resources, control

plane resources, and transmission resources

of the system.

Non-Main Control XPUb Board (SPU)

Subsystems 1 to 7 of the main control XPUb

board belong to the CPU for Service (CPUS),

which is used to process the services on the

control plane.


Page53

signaling

SSN0 MPU

SSN7 SPU

signaling

SSN0 SPU

SSN7 SPU

Main control

XPUb

Non-main control

XPUb


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DPUc Board

Components

22 DSP chips

Functions

Converts the speech format and forwards data

Performs codec of voice services of 960 TCH/Fs and supports

3,740 IWF flow numbers

Provides the Tandem Free Operation (TFO) function

Provides the voice enhancement function

Detects voice faults automatically

Work mode: resource pool


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DPUd Board

Components

22 DSP chips

Functions

Processes the PS services on up to 1,024 simultaneously

active PDCHs where signals are coded in MCS9

Processes packet links

Detects packet faults automatically

Supports GSM only



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DPUg Board The DPUg board has almost the same functions as the DPUd

board, whereas its capacity is higher than the DPUd board.

The DPUg board supports the same number of active PDCHs as

the DPUd board, whereas its packet service processing capability

(number of accessing subscribers) is much higher than the DPUd

board.

DPUd: Process 48 simultaneously active PDCHs (MCS9) per cell

DPUg: Process 110 simultaneously active PDCHs (MCS9) per cell

The DPUg board can process the PS services on up to 1,024

simultaneously active PDCHs where signals are coded in MCS9.



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DPUf Board Components

48 DSP chips

Functions

Converts the speech format and forwards data

Encodes and decodes voice services

Provides the Tandem Free Operation (TFO) function

Provides the voice enhancement function

Detects voice faults automatically

Supports GSM only



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Page61

Clock Subsystem

I

N

T

I

N

T

S

C

U

a

I

N

T

I

N

T

S

C

U

a

S

C

U

a

GCUa

Clock module

MPS

8

kHz

To NodeB EPS EPS

8

kHz

19.44 MHz, 32.768 MHz, 8 kHz

Clock cable High-speed backplane

channel

CN BITS GPS

To BTS

To MBTS

19.44 MHz, 32.768

MHz, 8 kHz

19.44 MHz, 32.768

MHz, 8 kHz


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GCUa/GCGa Board

Functions

Extracts timing signals from the external synchronization timing

port and from the synchronization line signals, processes the

timing signals,

Provides the timing signals and the reference clock for the entire

system

Performs the fast pull-in and holdover functions on the system

clock

Generates RFN signals for the system

Supports active/standby switchover



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GCUa/GCGa Board

Clock cable between

the GCUa/GCGa board

and the SCUa board


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Page64

Transport Subsystem-Interface

Board Board categorization

PEUa

FG2a

UOIa_IP

GOUa

POUa

Interface

board

IP

Electrical port

E1

FE/GE

Optical port

Channelized

STM-1

Unchannelized

STM-1

STM-1

GE

TDM

Electrical port E1 EIUa

FG2c

POUc

GOUc

Optical port OIUaChannelized

STM-1POUc


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Interface Processing Subsystem

Board

Type

Transmission

Mode Connector Type Board Supported Mode

INT

TDM

Electrical port EIUa GSM Only

Optical port OIUa GSM Only

POUc GSM&UMTS

IP

Electrical

port

FE/GE FG2a/FG2c GSM&UMTS

E1 PEUa GSM&UMTS

Optical

port

STM-1 POUc GSM&UMTS

GE GOUa/GOUc GSM&UMTS

Interface board categorization


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EIUa Board Functions

Transmits and receives 32 E1/T1 signals, and encodes and decodes

the E1/T1 signals

Processes signals according to the Link Access Procedure on the D

channel (LAPD) protocol and SS7 Message Transfer Part Layer 2

(MTP2) protocol

Provides the board-level Tributary Protect Switch (TPS) function

Provides the OM links when the TCS is configured on the MSC side

Supports the A, Abis, Ater, and Pb interfaces

Supports 384 TRXs when serving as the Abis interface board and

supports 960 CICs when serving as the A interface board


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OIUa Board

Functions

Provides one STM-1 port for TDM transmission and supports the rate of 155.52

Mbit/s

Provides the board-level Automatic Protection Switching (APS) function

Processes signals according to the Link Access Procedure on the D channel

(LAPD) protocol and SS7 Message Transfer Part Layer 2 (MTP2) protocol

Provides the OM links when the TCS is configured on the MSC side

Supports the A, Abis, Ater, and Pb interfaces

Supports 384 TRXs when serving as the Abis interface board and supports

1920 CICs when serving as the A interface board


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FG2a Board

Functions

Provides transmission of IP over Ethernet

Provides 8 channels over FE ports or 2 channels over GE

electrical ports

Provides the routing-based backup and load sharing

Provides the link aggregation function at the MAC layer

Supports the A, Abis, Gb, Iu, Iur, and Iub interfaces

Supports 384 TRXs when serving as the Abis interface board,

supports 6144 CICs when serving as the A interface board,

and supports a maximum data flow of 128 Mbit/s when

serving as the Gb interface board


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FG2c Board

Functions

Provides transmission of IP over Ethernet

Provides 12 channels over FE ports or 4 channels over GE

electrical ports



Supports 2048 TRXs when serving as the Abis interface

board, supports 23040 CICs when serving as the A interface

board, and supports a maximum data flow of 1024 Mbit/s

when serving as the Gb interface board

10M/100M/1000M

10M/100M


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PEUa Board

Functions

Provides 32 channels of HDLC over E1/T1 or 32 channels of IP over

PPP/MLPPP over E1/T1

Provides 128 PPP links or 32 MLPPP groups, with each MLPPP group

containing eight MLPPP links

Provides the board-level Tributary Protect Switch (TPS) function

Transmits, receives, encodes, and decodes the 32 E1s/T1s. The E1

transmission rate is 2.048 Mbit/s; the T1 transmission rate is 1.544 Mbit/s

Supports the Abis, Gb, and Iub interfaces

Supports 384 TRXs when serving as the Abis interface board and supports

64 Mbit/s throughput when serving as the Gb interface board


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POUc Board Functions

Provides four channels over the channelized STM-1/OC-3c optical ports

based on TDM or IP

Supports the Point-to-Point Protocol (PPP)

Provides the line clock recovery function

Provides the board-level Automatic Protection Switching (APS) function

Supports the A, Abis, Gb, Ater, Pb, Iur, and Iub interfaces

In TDM mode, it supports 512 TRXs when serving as the Abis interface

board in POUc over TDM mode, supports 3906 CICs when serving as the A

interface board, and supports 504 Mbit/s throughput when serving as the

Gb interface board.

In IP mode, it supports 2048 TRXs when serving as the Abis interface board

and supports 23,040 CICs when serving as the A interface board.


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Page73

GOUa Board

Functions

Provides two channels over GE ports, which are used for IP

transmission

Provides the board-level Tributary Protect Switch (TPS)

function


Supports the A, Abis, Iu, Iur, and Iub interfaces

Supports 384 TRXs when serving as the Abis interface board

and supports 6144 CICs when serving as the A interface board


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Page74

GOUc Board

Functions

Provides four channels over GE ports, which are used for IP transmission


Supports the extraction of line clock signals


Supports 2048 TRXs when serving as the Abis interface board, supports

23040 CICs when serving as the A interface board, and supports a maximum

data flow of 1024 Mbit/s when serving as the Gb interface board


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Page75

OM Subsystem

S

C

U

a

S

C

U

a

HUB

O

M

U

O

M

U

S

C

U

a

S

C

U

a

Alarm

box LMT

Extranet MPS

To

M2000

Intran

et

EPS

Ethernet cable

Serial port

cable


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Page76

Dual OM Plane

The OMU works in active and

standby mode.

The active/standby OMU boards

use the same external virtual IP

address to communicate with the

LMT or M2000.

The active/standby OMU boards

use the same internal virtual IP

address to communicate with the

SCU boards.


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Page77

OMUa/OMUb Board

The OMUa/OMUb board works as a back

administration module (BAM). It performs the

following functions:

Manages the configuration, performance, and

loading, facilitates troubleshooting, and ensures

security

Provides LMT or M2000 users with an interface

for OM of BSC6900


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OMUc Board

The OMUc board works as a back

administration module (BAM) of BSC6900. It

performs the following functions:

Manages the configuration, performance, and

loading, facilitates troubleshooting, and

ensures security

Provides LMT or M2000 users with an

interface for OM of BSC6900

Difference:

An OMUc board occupies only one slot and

contains a single hard disk.

Page78


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Page79

Hardware Reliability

Board Redundancy Mode

SCUa/SCUb Board redundancy + port trunking on GE ports

XPUa/XPUbSPUa/SPUb Board redundancy

DPUb/DPUc/DPUd/DPUf/DPUg Board resource pool

GCUa/GCGa Board redundancy

AOUa/AOUc/OIUa/

UOIa/UOIc/POUa/POUc

Board redundancy + MSP 1:1 or MSP 1+1 optical port

redundancy

TNUa Board redundancy

PEUa/AEUa/EIUa Board redundancy

GOUa/GOUc Board redundancy + GE port redundancy or load sharing

FG2a/FG2c Board redundancy + GE/FE port redundancy or load sharing

OMUa/OMUc Board redundancy


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Page81

Classification of BSC6900 Boards (GSM)

OM boards: OMUa/OMUb/OMUc

Switching and control boards: SCUa/SCUb/TNUa

Clock signal processing board: GCUa/GCGa

Signaling processing board: SPUa/SPUb/XPUa/XPUb

Universal data processing board: DPUa/DPUc/DPUd/DPUf/DPUg

Interface processing board:

EIUa, OIUa, FG2a, FG2c, GOUa, GOUc ,PEUa, POUc


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Classification of BSC6900 Boards

Page82

Board Logical Function

eXtensible

Processing Unit

(XPU)

SPUa/SPUb

GCP

UCP

RGCP

RUCP

MCP

XPUa/XPUb

GCP

RGCP

MCP

Data Processing

Unit (DPU)

DPUa/DPUc/DPUf GTC/ITC

DPUd/DPUg GPCU


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Page95

Contents






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Page96

BSC6900 GSM Signal Flows

User-Plane Signal Flow

GSM CS Signal Flow

GSM PS Signal Flow

Control-Plane Signal Flow

Signaling Flow on the A Interface

Signaling Flow on the Abis Interface

Signaling Flow on the Gb Interface


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Page97

GSM CS Signal Flow

Abis over TDM & A over TDM

BM/TC

Combined Mode

BM/TC

Separated Mode


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Page98

GSM CS Signal Flow

Abis over IP & A over TDM

BM/TC

Separated Mode

BM/TC

Combined Mode


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Page99

GSM PS Signal Flow

Abis over TDM

Abis over IP


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Page100


A over TDM

BM/TC

Separated Mode

BM/TC

Combined Mode


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Page101


A over IP


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Page102

Signaling Flow on the Abis

Interface Abis over TDM

Abis over IP


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Page103

Signaling Flow on the Gb Interface

Gb over IP/FR


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) :18pt

Page104

Contents






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Page105

Typical Hardware Configuration

(GSM) Service processing boards

The number of A-interface circuits should be considered in the configuration of

DPUc/f boards.

The number of PDCHs should be considered in the configuration of DPUd/g boards.

The number of TRXs should be considered in the configuration of XPUa/XPUb boards.

Interface boards

In Abis over IP mode, the FG2a, FG2c, PEUa, POUc, GOUa, and GOUc boards can be

configured. In Abis over TDM mode, the EIUa and OIUa boards can be configured.

In A over IP mode, the FG2a, FG2a, GOUa, and GOUc boards can be configured. In A

over TDM mode, the EIUa, OIUa, and POUc boards can be configured.


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Page106

Typical Configuration

Specifications (GSM) Configuration of service processing boards of BSC6000 V900R008 and BSC6900

V900R012/R013

Board

BSC6000 V900R008 BSC6900 V900R012 BSC6900

V900R013

Main

control

XPUa

Non-

main

control

XPUa

DPUc DPUd Main control

XPUb

Non-main

control

XPUb

DPUc DPUd DPUf DPUg

Number of TRXs 270 360 - - 640 640 - - - -

Number of cells 270 360 - - 640 640 - - - -

Number of BTSs 270 360 - - 640 640 - - - -

Number of

active PDCHs

(MCS-9)

- - - 1024 - - - 1024 - 1024

Number of

TCHs/Fs - - 960 - - - 960 - 1920 -


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Page107

Typical Configuration Specification

(GSM) Interface board specifications

Item EIUa FG2a OIUa PEUa GOUa FG2c GOUc POUc_TDM POUc_IP

Number of

TRXs 384 384 384 384 384 2048 2048 512 2048

Number of CICs

(64 K) over the

A interface

960 6144 1920 - 6144 23,040 23,040 3906 23,040

Gb (Mbit/s) - 128 - 64 - 1024 1024 504 -


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Page108

Maximum Specifications

(V900R012/R013 GO)

MPS

EPS

EPS

512 TRXs

1024 TRXs

1024 TRXs

BM/TC Combined

MPS

EPS

EPS

1024 TRXs

1536 TRXs

1536 TRXs

BM/TC Separated

MPS

EPS

EPS

1024 TRXs

2048 TRXs

1024 TRXs

A over IP

MPS

EPS

EPS

EPS 1536 TRXs

1024 TRXs

1536 TRXs

1536 TRXs

R12 R13

R12/R13 R12/R13


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Page109

Typical Configuration (V900R013

GO) BM/TC Separated (4096 TRXs)

The DPUf/g board is used.

Abis/Ater/A interface: TDM (optical

transmission)

Gb interface: FR (optical

transmission)

Because of the lack of backplane

TDM resource, the POUc and OIUa

boards that serve as the Ater

interface boards have the same

specifications.

4096TRX

14 15 16 17 18 19 20 21 22 23 24 25 26 27

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

OIU

a(A

ter)

OIU

a(A

ter)

XP

Ub

XP

Ub

XP

Ub

XP

Ub

TN

Ua

TN

Ua

SC

Ub

SC

Ub

XP

Ub

XP

Ub

DP

Ug

DP

Ug

0 1 2 3 4 5 6 7 8 9 10 11 12 13

14 15 16 17 18 19 20 21 22 23 24 25 26 27

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

OIU

a(A

ter)

OIU

a(A

ter)

OIU

a(A

ter)

OIU

a(A

ter)

XP

Ub

XP

Ub

XP

Ub

XP

Ub

TN

Ua

TN

Ua

SC

Ub

SC

Ub

DP

Ug

DP

Ug

0 1 2 3 4 5 6 7 8 9 10 11 12 13

14 15 16 17 18 19 20 21 22 23 24 25 26 27

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

OIU

a(A

ter)

OIU

a(A

ter)

DP

Ug

DP

Ug

OM

Uc

OM

UC

XP

Ub

XP

Ub

XP

Ub

XP

Ub

TN

Ua

TN

Ua

SC

Ub

SC

Ub

PO

Uc(G

B)

GC

Ua

GC

Ua

0 1 2 3 4 5 6 7 8 9 10 11 12 13

TC

14 15 16 17 18 19 20 21 22 23 24 25 26 27

OIU

a(A

ter)

OIU

a(A

ter)

PO

Uc(A

)

PO

Uc(A

)

TN

Ua

TN

Ua

SC

Ub

SC

Ub

DP

Uf(T

C)

DP

Uf(T

C)

DP

Uf(T

C)

DP

Uf(T

C)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

14 15 16 17 18 19 20 21 22 23 24 25 26 27

OIU

a(A

ter)

OIU

a(A

ter)

OIU

a(A

ter)

OIU

a(A

ter)

PO

Uc(A

)

PO

Uc(A

)

PO

Uc(A

)

PO

Uc(A

)

DP

Uf(T

C)

TN

Ua

TN

Ua

SC

Ub

SC

Ub

DP

Uf(T

C)

DP

Uf(T

C)

DP

Uf(T

C)

DP

Uf(T

C)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

14 15 16 17 18 19 20 21 22 23 24 25 26 27

OIU

a(A

ter)

OIU

a(A

ter)

PO

Uc(A

)

PO

Uc(A

)

TN

Ua

TN

Ua

SC

Ub

SC

Ub

DP

Uf(T

C)

DP

Uf(T

C)

DP

Uf(T

C)

DP

Uf(T

C)

0 1 2 3 4 5 6 7 8 9 10 11 12 13


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Page110


GO)

BM/TC Combined (4096 TRXs)

The DPUf board is used.

Abis/Ater/A interface: TDM (optical

transmission)

Gb interface: FR (optical transmission)

4096TRX

14 15 16 17 18 19 20 21 22 23 24 25 26 27

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

)

PO

Uc(A

)

PO

Uc(A

)

PO

Uc(A

)

XP

Ub

XP

Ub

XP

Ub

XP

Ub

TN

Ua

TN

Ua

SC

Ub

SC

Ub

DP

Uf(T

C)

DP

Uf(T

C)

DP

Uf(T

C)

DP

Uf(T

C)

DP

Ug

DP

Ug

0 1 2 3 4 5 6 7 8 9 10 11 12 13

14 15 16 17 18 19 20 21 22 23 24 25 26 27

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

)

PO

Uc(A

)

PO

Uc(G

B)

DP

Ug

DP

Ug

XP

Ub

XP

Ub

XP

Ub

XP

Ub

TN

Ua

TN

Ua

SC

Ub

SC

Ub

XP

Ub

XP

Ub

DP

Uf(T

C)

DP

Uf(T

C)

DP

Uf(T

C)

DP

Uf(T

C)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

14 15 16 17 18 19 20 21 22 23 24 25 26 27

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

)

PO

Uc(A

)

DP

Ug

DP

Ug

OM

Uc

OM

Uc

XP

Ub

XP

Ub

XP

Ub

XP

Ub

TN

Ua

TN

Ua

SC

Ub

SC

Ub

DP

Uf(T

C)

DP

Uf(T

C)

DP

Uf(T

C)

DP

Uf(T

C)

GC

Ua

GC

Ua

0 1 2 3 4 5 6 7 8 9 10 11 12 13


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Page111


GO)

The DPUf/g board is used.

All-IP transmission is used.

Abis/A/Gb interface: IP

All-IP transmission 4096TRX

14 15 16 17 18 19 20 21 22 23 24 25 26 27

DP

Ug

DP

Ug

XP

Ub

XP

Ub

XP

Ub

XP

Ub

SC

Ub

SC

Ub

DP

Uf(IW

F)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

14 15 16 17 18 19 20 21 22 23 24 25 26 27

FG

2c(A

bis

)

FG

2c(A

bis

)

GO

Uc(A

)

GO

Uc(A

)

DP

Ug

DP

Ug

XP

Ub

XP

Ub

XP

Ub

XP

Ub

SC

Ub

SC

Ub

XP

Ub

XP

Ub

DP

Uf(IW

F)

DP

Uf(IW

F)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

14 15 16 17 18 19 20 21 22 23 24 25 26 27

FG

2c(A

bis

)

FG

2c(A

bis

)

FG

2c(G

B)

GO

Uc(A

)

GO

Uc(A

)

OM

Uc

OM

Uc

XP

Ub

XP

Ub

XP

Ub

XP

Ub

SC

Ub

SC

Ub

DP

Uf(IW

F)

DP

Uf(IW

F)

GC

Ua

GC

Ua

0 1 2 3 4 5 6 7 8 9 10 11 12 13


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Page112

Summary

We have learned about the BSC6900 in terms of its features

and functions, subracks, boards, subsystems, signal flows of

both the control plane and user plane of all interfaces,

configuration principles, and typical configurations.


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Page113

Terms

EPS: extended processing subrack

MPS: main processing subrack

TCS: transcoder subrack

LMT: local maintenance terminal

Thank you www.huawei.com

Documents

BSC 6900 Training