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2009/06 Security Level: Internal Use www.huawei.com BSC6900V9R011 GO Hardware Structure and System Description TSD Wireless Product Service Department-GBSS ISSUE1.0

BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

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Page 1: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

2009/06 Security Level: Internal Use

www.huawei.com

BSC6900V9R011 GO Hardware Structure

and System Description

TSD Wireless Product Service Department-GBSS

ISSUE1.0

Page 2: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 2HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

The BSC6900 is an important network

element of Huawei Single RAN solution. It

adopts the industry-leading multiple radio

access technologies, IP transmission

mode, and modular design. The BSC6900

can be flexibly configured as a BSC6900 G

SM, BSC6900 UMTS, or BSC6900 GU as r

equired in different networks.

Page 3: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 3HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Know the functions and features of BSC6900

Master the hardware structure of BSC6900

Master the signal flow

Master the typical configuration of BSC6900

Page 4: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 4HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Reference

BSC6900 Technical Description

BSC6900 Hardware Description

Page 5: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 5HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Chapter 1 BSC6900 System DescriptionChapter 1 BSC6900 System Description

Chapter 2 BSC6900 Hardware Structure

Chapter 3 BSC6900 Signal Flow

Chapter 4 BSC6900 Typical Configuration

Page 6: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 6HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Location

The interfaces between the BSC6900 GSM and each

NE in the UMTS network are as follows: Iub Interface: the interface between the NodeB and RNC. Iur Interface: the interface between the RNC and RNC. Iu-CS Interface: the interface between the MSC and MGW. Iu-PS Interface: the interface between the RNC and SGSN Iu-BC Interface: the interface between the RNC and CBC

The interfaces between the BSC6900 GSM and each NE i

n the GSM network are as follows: Abis Interface: the interface between the BTS and BSC A Interface: the interface between the BSC and MSC or MGW Gb Interface: the Interface between the BSC and SGSN

Page 7: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 7HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

BSC6900V9R11C00BSC6900V9R11C00

BSC6000/BSC6810

Unitary logic

Frame

Unitary OM SMP

Configuration Maintenance Alarm Performance OS Internal

Communication

Unitary

Resource

Management Co-

Transmission

Unitary Control

Plane GBSC Control

Plane Optimize

XPUb DPUe POUc FG2c GOUc UOIc AOUc

Frame Unitary Multi-kernel Boards

Transmission and Resource Management

Unitary

Pool resource

BSC6900 New Features

Page 8: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 8HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

• Smooth evolution from BSC to RNC with software upgrade• Reducing CAPEX by reusing hardware• Dynamic capacity adjustment between 2G&3G

Software upgrade

BSC6900 Product Characters - multi-mode amalgamation

BSC

BSC

RNC

RNC

RNC

BSC

GSM&UMTS cabinetGSM&UMTS co-cabinet

RNC

RNC

BSC

Page 9: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 9HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

• Centralized OMC for GSM&UMTS, unified platform for network construction, 2G/3G network pl

anning, performance evaluation and trouble shooting etc.

• Simplifying the network architecture, reducing co-ordination and maintenance effort, man

power and OPEX Saving

PM Management

Configuration Management

Network Optimization

Fault Management

iManagerTM M2000

Unified OAM toolkits: Easier 2G/3G trouble shooting

Unified GENEX : Unified 2G/3G network planning, performance evaluation and performance trouble shooting

Unified CME : Simultaneous 2G/3G data configuration, correctness and efficiency guaranteed

BSC6900 Product Characters - Co OAM

Page 10: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 10HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

pT

RA

Up

TR

AU

IPUNI-BTS

UNI-BTSUNI-BSCCo-transmission

UDP

IP

/

PPP

IP SW

Router

FP

FP

FP

3G

2G

3G

2G

pT

RA

U

pT

RA

U

FP

FP

FP

UDP

IP

/

PPP

IP SW

Router

pTRAU

Inte

rface

bo

ardIn

terfa

ce b

oard

5-10% Gain

0.2 0.1 0.05 0.03 0.02 0.01 0.005 0.002 0.001GOS

Tra

ffic

Ga

in (

%)

10

9

8

7

6

5

4

3

2

1

0• With unified transport resource management,

bandwidth can be shared by UMTS&GSM.

Without Co-trans Co-trans

UMTS / GSM UMTS + GSMTraffic Traffic rejectionrejection

Multiplexing

Gain

BSC6900 Product Characters - Co TRM

Page 11: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 11HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

UMTS

GSM

Cs service PS service

Service direction on UMTS/GSM

HeavyLoad

HeavyLoad

HeavyLoad

HeavyLoad

UMTS

GSM

Load control between UMTS/GSM

Load control by inter-RAT HO

3G/2G cell load consideration make traffic

load spread in UMTS&GSM evenly, network

usage efficiency improved

3G/2G cell load consideration make it more

accurate for the service direction, better

performance achieved

Huawei Lab Simulation

BSC6900 Product Characters - Co RRM

Page 12: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 12HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

SW upgrade with Legacy HW + New HW (optional)

SW upgrade with Legacy HW + New HW (expansion)

BSC6000 BSC6810 and BSC6900 Evolution Paths

200920082006 2010Q12008Q3

GBSS8.1/RAN10 GBSS9.0/RAN11 GBSS12.0/RAN12

BSC6000

SW upgrade with Legacy HW + New HW (optional)

BSC6810

BSC6900 BSC Only

2009Q2

BSC6900 RNC Only

2009Q1

BSC6900 Dual mode

Note : Legacy HW is HW available from GBSS8.1/RAN10.0 for BSC6900

BSC6900 BSC Only

BSC6900 RNC Only

BSC6900 Dual mode

BSC6810

Naming changing to BSC6900

SW upgrade with Legacy HW + New HW (expansion)

SW upgrade with Legacy HW + New HW (optional)

SW upgrade

Naming changing to BSC6900

Page 13: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 13HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

BSC6900 Capacity Index

BSC6900 GSM only

Item 1MPS+1TCS 1MPS+1EPS+2TCS 1MPS+2EPS+2TCS

Number of

cabinets

2 2 2

BHCA(K) 1750 3500 5250

Traffic volume

( Erl )6500 13000 19500

Number of TRXs 1024 2048 3072

Number of active

PDCHs ( MCS-

9 )

4096 8192 12288

Typical configuration specifications of the BSC6900 GSM(BM/TC separated and Abis over non-IP R11 board)

Page 14: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 14HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Chapter 1 BSC6900 System Description

Chapter 2 BSC6900 Hardware StructureChapter 2 BSC6900 Hardware Structure

Chapter 3 BSC6900 Signal Flow

Chapter 4 BSC6900 Typical Configuration

Page 15: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 15HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Chapter 2 BSC6900 Hardware StructureChapter 2 BSC6900 Hardware Structure

2.1 Frame and Subrack

2.2 Board Introduction

2.3 Cable Introduction

Page 16: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 16HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

BSC900 Hardware--Cabinet The BSC6900 uses the Huawei N68E-22 cabinet and the Huawei

N68-21-N cabinet.

The two models of cabinets have the same appearance.N68E-22 is

divided into a single-door cabinet or a double-door cabinet.

Item Specification

Height of the available space

46U

Weight Empty cabinet≤100 kg

Cabinet in full configurati

on≤300 kg

Input voltage range

-40 V to -57 V

Page 17: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 17HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

BSC900 Hardware--Cabinet

The BSC6900 GSM cabinet is classified into

main processing rack (MPR), extended proc

essing rack (EPR), and transcoder rack (TC

R).

Page 18: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 18HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

BSC900 Hardware--Subrack The BSC6900 GSM subrack has a standard width of 19 inches. The height

of each subrack is 12 U. The boards are installed on the front and rear side

s of the backplane, which is positioned in the center of the subrack.

A subrack provides 28 slots. The slots on the front of the subrack are numb

ered from 0 to 13, and those on the rear are numbered from 14 to 27.

Page 19: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 19HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

BSC900 Hardware--Subrack

1 Fan box 2 Mounting ear 3 Guide rail

4 Front cable trough

5 Boards 6 Grounding screw

7 DC power input port

8 Port for the monitoring signal cable of the power distribution box

9 Cover plate of the DIP switch

Front ViewRear View

Classification of BSC6900 GSM subracks

Item Index

Height of the subrack 12U

Weight of the subrack Empty: 25kg;

Full configuration≤57kg

Consumption l MPS subrack: 1000W

l EPS subrack: 1000W

l TCS subrack:1000W

Page 20: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 20HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

DIP Switch on the SubrackThe DIP switch on the subrack has eight bits numbered in ascending o

rder from 1 to 8

If the bit is set to ON, it indicates 0. If the bit is set to OFF, it indicates

1.

Page 21: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 21HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

DIP Switch on the Subrack

The function of the switch 6?

Subrack nu

mber

Subrack code

1 2 3 4 5 6 7 8

Subrack 0 ON ON ON ON ON ON ON OFF

Subrack 1 OFF ON ON ON ON OFF ON OFF

Subrack 2 ON OFF ON ON ON OFF ON OFF

Subrack 3 OFF OFF ON ON ON ON ON OFF

Subrack 4 ON ON OFF ON ON OFF ON OFF

Subrack 5 OFF ON OFF ON ON ON ON OFF

Page 22: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 22HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Chapter 2 BSC6900 Hardware StructureChapter 2 BSC6900 Hardware Structure

2.1 Frame and Subrack

2.2 Board Introduction

2.3 Cable Introduction

Page 23: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 23HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

BSC6900 Overall Structure The overall structure of the BSC6900

Switching Subsystem;

Service Processing Subsystem;

Clock Synchronization Subsystem;

Interface Synchronization Subsystem;

OM Subsystem.

GO-Mode

Page 24: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 24HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Switching Subsystem Functions

Provides intra-subrack Medium Access Control (MAC) switching

Provides intra-subrack Time Division Multiplexing (TDM) switching

Distributes clock signals to the service processing boards

Provides inter-subrack switching

Provides switching channels for traffic data

Provides OM channels

Hardware Involved TDM switching - TNUa board

MAC switching - SCUa board

Page 25: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 25HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Board——TNUa

Port Function Matching

connector

TDM0 ~ 5 TDM high-speed serial port, used to connect

the TNUaS between subracks

DB14

GTNU

PARC

RUN

ALM

ACT

TN

M5

TN

M4

TN

M0

TN

M1

TN

M2

TN

M3

The TNUa is the TDM switching unit in the BSC6900.

The active and standby TNUa are inserted in slot 4 and slot 5. Th

e TNUa board performs the TDM switching function, which is the

TDM switching center of the system.

The TNUa has the following functions:

Providing 128 K ×128 K TDM switching

Allocating TDM network resources, establishing, and releasing ra

dio links

Page 26: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 26HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Board——SCUa

Port Function Matching

EHT0~ 9 10M/100M/1000M Ethernet ports, used to connect subracks RJ45

EHT10~ 1

1

10M/100M/1000M Ethernet ports, used to connect GBAM (Only the m

ain subrack is connected with the GBAM)

RJ45

COM Debugging port RJ45

CLKIN Clock source port, used to receive the 8 kHz clock signals from the

panel of the GGCU

RJ45

TESTOUT Clock test signal port, used to output clock test signals SMB connector

The SCUa is the switching control unit in the BSC6900.

The active and standby SCUa are inserted in slot 6 and 7. The SCUa board provides maintenance management of the subrack and GE switching platform for the subrack.

The SCUa has the following functions:

Performing maintenance management of the subrack

Providing a GE platform for the subrack

Providing clock information for the other boards in the same subrack except the GCUa

ACTLINK

ACTLINK

ACTLINK

Page 27: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 27HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Service Processing Subsystem Functions

User data transfer

Radio channel ciphering and deciphering

System admission control

Data integrity protection

Mobility management

Cell broadcast service control

Data volume reporting

Radio access management

CS service processing

PS service processing

Radio resource management and control

System information and user message tracing

Page 28: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 28HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Service Processing Subsystem

Hardware Involved XPUa/b board, SPUa/b board, DPUa/b/c/d/e board

Board Specification

XPU/SPU is the signaling processing unit

SPU board can process GSM/UMTS signaling panel, XPU board can process

GSM signaling panel

SPU board Works for BSC6900 GU mode

XPU board Works for BSC6900 GSM only mode

The postfix of “a” board contain 4 logic subsystem, and the postfix of “b” board

contain 8 logic subsystem

Services Process Unit DPUa/b/c/d/e

Page 29: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 29HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Board Introduction-XPU/SPU

Loaded with different software, the XPUa board is functionally di

vided into main control XPUa board and non-main control XPUa

board.

XPUa

PARC

RUN

ALM

ACT

10

/10

0/1

00

0B

AS

E-T

ACTLINK

0

1

2

3

The 0 subsystem of main control XPU/SPU boa

rd is MPU, used to manage the user panel and

signaling plane resources within the subrack an

d process the signaling.

The subsystem of non-main control XPU/SPU b

oard is CPU, used to process the signaling.

For GSM Only mode, one MPU for the system i

s enough. If the system upgrade to GU mode, o

ne MPU should for one subrack.

Main control XPUa

Non-Main control XPUa

Page 30: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 30HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Board Introduction——DPUc

Function

DPUc process CS services and perform the voice coding and deco

ding function. It works as subrack system pool mode.

Provides the speech format conversion and data forwarding functi

ons when configured in BM subrack.

Provides the Tandem Free Operation (TFO) function

Provides the voice enhancement function

Detects voice faults automatically

DPUd board works for GSM services.

DPUa

PARC

RUN

ALM

ACT

Page 31: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 31HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Board introduction——DPUd

Function

The DPUd is the Data Processing Unit for PS services. It can be

installed in slots 8–11 in MPS and 8-27 in EPS , it processes th

e packet services for the BSC.

Each DPUd supports 1024 activated PDCHs at the same time, a

nd all the PDCHs support MSC-9 coding.

Packet links processing function.

PS fault self-detection.

DPUd board works for GSM services.

DPUa

PARC

RUN

ALM

ACT

Page 32: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 32HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Subsystems Five: Interface Board System

Board

Type

Physical Board

Board specification Scene

EIUa Transmits, receives, encodes, and decodes 32 E1s/T1s. GSM Only

OIUa Provides one STM-1 port for TDM transmission GSM Only 、 GU

Old Boards

FG2a Provides eight channels over FE ports or two channels over GE electrical ports

GSM Only 、 GU

GOUa Provides two channels over GE optical ports GSM Only 、 GU

PEUa Provides 32 channels of E1s/T1s for HDLC transmissionExtracts line clock signals

GSM Only 、 GU

Multi-kernel Boards

FG2c Provides 12 channels over FE ports or four channels over GE electrical ports

GSM Only 、 GU

GOUc Provides four channels over GE optical ports GSM Only 、 GU

POUc Provides four channels over channelized optical STM-1/OC-

3 ports based on IP protocol

Extracts line clock signals

GSM Only 、 GU

Page 33: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 33HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Mapping for Interface Board and VersionPhysica

l

Board

Function Interface TypeAbis Ater A Gb Pb

PEUa FR       BSC V9R8C01

 

HDLC BSC V9R8C01

       

IP mBSCV9R11  

  mBSCV9R11  

 

FG2a IP BSC V9R8C01

  BSC V9R8C01

BSC V9R8C01

 

GOUa IP BSC V9R8C01

  BSC V9R8C01

 

POUc TDM+ HDLC

mBSC V9R11 mBSC V9R11 mBSC V9R11 mBSC V9R11 mBSC V9R11

IP mBSC V9R11 mBSC V9R11 mBSC V9R11    FG2c IP mBSC V9R11   mBSC V9R11 mBSC V9R11  GOUc IP mBSC V9R11   mBSC V9R11 mBSC V9R11  EIUa Abis TDM BSC V9R1        

Ater TDM   BSC V9R1      Pb TDM         BSC V9R1A TDM     BSC V9R1    

OIUa Abis TDM BSC V9R1        Ater TDM   BSC V9R1      Pb TDM         BSC V9R1A TDM     BSC V9R1    

Page 34: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 34HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Co-Transmission for the Interface BoardPhysical

Board

Function Interface Board Sharing

Iub Iu(Iur/IuCS/IuPS)

Abis A Ater Gb

FG2a IP Iub/Iu Co-Interface board Abis/A Co-Interface board   Gb Separated

GOUa IP Iub/Iu Co-Interface board Abis/A Co-Interace board   Gb Separated

AOUc ATM Iub/Iu Co-Interface board        UOIc ATM Iub/Iu Co-Interface board        

IP Iub/Iu/Abis/A(Ater) 共接口板  POUc TDM+ HDLC     Abis/A(Ater)/Gb(Pb) Co-Interface board

IP Iub/Iu/Abis/A(Ater) Co-Interface board  FG2c IP Iub/Iu/Abis/A(Ater)/Gb(Pb) Co-Interface board

GOUc IP Iub/Iu/Abis/A(Ater)/Gb(Pb) Co-Interface board

EIUa Abis TDM            Ater TDM            Pb TDM            A TDM            

OIUa Abis TDM            Ater TDM            Pb TDM            

A TDM            

Page 35: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 35HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Board Introdction-FG2c The FG2c board supports IP over Ethernet transmission.

The FG2c board performs the following functions:

Provides 12 channels over FE ports or four channels over GE electric

al ports

Provides the link aggregation function at the MAC layer

Provides the routing-based backup and load sharing

Supports the transmission of data over all its Ethernet ports on the ba

sis of the synchronized clock signals

Supports the Abis 、 A 、 Gb 、 Iu 、 Iub interfacesPort Function Connector type

10/100BASE-T 10M/100M Ethernet ports, used to transmit 10/100M

signals

RJ45

10/100/1000BASE-

T

10M/100M/1000M Ethernet ports, used to transmit

10/100/1000M signals

RJ45

2M0 、 2M1 Port for 2 MHz clock signal outputs male connector

Page 36: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 36HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Board Introduction-GOUc

As an optical interface board, the GOUc board supports IP ov

er Ethernet transmission.

The GOUc board performs the following functions:

Provides four channels over GE optical ports

Provides the routing-based backup and load sharing

Extracts line clock signals

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

Port Function Connector

Type

RX Optical port, used to transmit and receive optical signals. TX

refers to the transmitting optical port, and RX refers to the

receiving optical port.

LC/PC

TX

2M0 、 2M1 Port for 2 MHz clock signal outputs SMB male

connector

Page 37: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 37HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Board Introduction-POUc As an interface board, the POUc board supports IP over channeliz

ed STM-1/OC-3 transmission.

The POUc board performs the following functions: Provides four channels over channelized optical STM-1/OC-3 ports based o

n IP protocol

Supports the PPP function

Extracts line clock signals

Provides the Automatic Protection Switching (APS) function between the a

ctive and standby POUc boards

Supports the A, Abis, Gb, Ater,Pb, Iu, Iub interfaces

Port Function Connector type

RX Optical port, used to transmit and receive optical signals. TX refers to the

transmitting optical port, and RX refers to the receiving optical port.

LC/PC

TX

2M0

2M1

Output ports for clock signals. These ports are used to transmit the 2 MHz line

clock signals to the GCUa/GCGa board. The clock signals are extracted from u

pper-level devices and serve as the clock sources of the BSC6900 system.

SMB male

connector

Page 38: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 38HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Subsystems Four: Clock Subsystem Clock Source

Bits clock

Line clock

GPS

Reference Clock for the MPS or EPS

The reference clocks are provided by the GCUa. The reference clocks generate 8kHz clock signals through the GCUa.

MPS: The clock signals are sent to the SCUa in the MPSa subrack through the backplane. Then, the clock signals are sent to other boards in the same subrack.

EPS: The clock signals are sent to the SCUa board in the EPSa subrack through th

e clock cable. Then, the signals are sent to other boards through the backplane.

Reference Clock for the TCS

Each TCS extracts line clock from the A interface. The line clock is processed through A interface panel and then generates 8 KHz clock signals.

The clock signals are sent to the SCUa in the subrack through the backplane. Then the clock signals are sent to other boards in the same subrack.

Page 39: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 39HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Structure of the Clock Synchronization Subsystem

High-speed backplane channel

RINT

RINT

SCUa

RINT

RINT

SCUa

SCUa

GCUa/GCGa Clock module

RSS

8kHz

To BTS/NodeB

To BTS/NodeBTo BTS/NodeBRBS RBS

19.44MHz, 32.768MHz, 8KHz

19.44MHz, 32.768MHz, 8KHz

19.44MHz, 32.768MHz, 8KHz

8kHz

Clock cable

CN BITS GPS

8kHz

Page 40: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 40HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

Board——GCUa

GGCU

PARC

RUNALMACT

8

9

COM0

COM1

0

1

2

3

4

5

6

7

CLK

OU

TT

ES

TIN

TE

ST

OU

T

CL

KLI

N1

CL

KLI

N0

The GCUa is the general clock unit in the BSC6900. The active and

standby GCUa are configured in slots 12 and 13 in the MPS. The G

GCU board provides synchronous timing signals for the system

The GCUa has the following functions:

Generating and keeping synchronous clock signals

Keeping the consistency of synchronization information output from the active

and standby GCUa

Port Function Connector type

ATN-IN Reserved SMA male connector

CLKOUT0~9

Ports for transmitting synchronization clock signals. The ten

ports are used to transmit the 8 kHz clock signals to the

CLKIN port on the panel of the SCUa board.

RJ45

COM0,COM1 Reserved RJ45

TESTOUT Reserved SMB male connector

TESTIN Input port for testing external clock signals SMB male connector

CLKIN0-1Synchronization clock input port, used to receive the 2.048

MHz clock signals or 2.048 Mbit/s code stream signals

SMB male connector

Page 41: BSC6900V900R011 GO Hardware Structure and System Description ISSUE1.0

Page 41HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

M2000

SCUa

SCUa

LANSWITCH

OMUa

OMUa

SCUa

SCUa

WEB LMT External network

MPS

Internal network

EPS

Internet cable

Serial cable

Subsystems Five: O&M Subsystem

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Board Introduction —— OMU The OMUa board works as a bridge for the communication betwe

en the WebLMT and the other boards in the BSC6900.

Function

Performing the configuration management, performance management,

fault management, security management, and loading management f

unctions for the system

To control the communication between the LMT/M2000 and the SCU

a board of the BSC6900

(1) Captive screw (2) Shielding finger (3) Ejector lever (4) LED (RUN)

(5) LED (ALM) (6) LED (ACT) (7) Button (RESET) (8) Button (SHUTDOWN)

(9) USB port (10) Ethernet port (ETH0)

(11) Ethernet port (ETH1)

(12) Ethernet port (ETH2)

(13) COM port (14) VGA port (15) LED (HD) (16) LED(OFFLINE)

(17) Hard disk (18) Screw for fixing the hard disk  

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Chapter 2 BSC6900 Hardware StructureChapter 2 BSC6900 Hardware Structure

2.1 Frame and Subrack

2.2 Board Introduction

2.3 Cable Introduction

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TNUa ( Active )

Board

Board

LVDS TDM path of backplane

Inter-TNUa Cable

TNUa ( Standby )

TNUa ( Active )

Board

BoardTNUa ( Standb

y )

TDM Switching Subsystem Intra-Subrack: Other boards in the subrack connect with TNUa (Activ

e/Standby) through LVDS (Low Voltage Differential Signal) high spee

d serial ports of backplane.

Inter-Subrack: TDM units of every subrack fully interconnected with e

ach other through TNUa crossover cables.

In full intra-subrack interconnection, 2 cables support 8K bandwidth.

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Inter-Subrack Interconnections of TNUa Crossover Cables

1 #

0 #TNUa TNUa

TNUa TNUa

2 #TNUa TNUa

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Interconnection Between SCUa Active/standby SCUa boards: HiG interconnection; 30G bandwidth.

Intra-subrack : The SCUa board provides 48G GE switching capability th

rough backplane.

Inter-subrack : The SCUa boards are connected in star topology throug

h intercross cable using the GE ports on SCUa.

Switching and control

unit

Other board

Other board

Other board

Other board

Other board

Other board

Switching and control

unit

Switching and control

unit

RSS

RBS

RBS

High-speed backplane channel

Network cable

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The Physical Cable Between Subracks SCUa in MPS subrack

GE0 ~ 7 interconnect with EPS, open the port by MML command.

GE8/9 interconnect with main TCS

GE10/11 interconnect with GBAM

SCUa in EPS subrack

GE0 ~ 1 interconnect with MPS

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Interconnection Between Subrack

A interface

Pb interface Abis interfaceAter interface

Subracks of BSC6000 compose an interconnection switching network through cascade.

TCS

TCS TCS TC

EPS

MPS EPSBM

SCUa Star interconnection

TNUa Full interconnection

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Clock Synchronization Interconnection The connection of the GCUa of the main s

ubrack and the extension subrack is show

n: The active and standby GCUa output 10-way s

ignal channel respectively. A signal channel of

an active GCUa and that of a standby GCUa a

re integrated through the Y-shaped cable.

Any of component including GCUa, Y-shaped cable, and SCUa is faulty, the system clock stil

l can work normally.

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Chapter 1 BSC6900 System Description

Chapter 2 BSC6900 Hardware Structure

Chapter 3 BSC6900 Signal FlowChapter 3 BSC6900 Signal Flow

Chapter 4 BSC6900 Typical Configuration

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GSM CS Signal Flow Abis over TDM+A over TDM

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GSM CS Signal Flow Abis over HDLC/IP+A over TDM

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GSM CS Signal Flow Abis over TDM+A over IP

Abis over HDLC/IP+A over IP

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GSM PS Signal Flow (Inner-PCU) Abis over TDM

Abis over HDLC/IP

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Signaling Flow on the A Interface Abis over TDM+A over TDM

the signaling processing board XPUa processes the signaling accor

ding to the MTP3, SCCP, and BSSAP protocols.

A Over IP

The A interface board processes the MTP2 protocol

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Signaling Flow on the Abis Interface Abis over TDM/IP/HDLC

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Signaling Flow on the Gb Interface Gb Over IP

the signaling processing board processes the signaling accordin

g to the NS and BSSGP protocols. Then, the signaling is transm

itted to the Gb interface board through the SCUa board.

The Gb interface board processes the signaling according to the

IP or FR protocol. Then, the signaling is transmitted to the SGS

N over the Gb interface.

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OM Signal Flow

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Chapter 1 BSC6900 System Description

Chapter 2 BSC6900 Hardware Structure

Chapter 3 BSC6900 Signal Flow

Chapter 4 BSC6900 Typical ConfigurationChapter 4 BSC6900 Typical Configuration

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Specification of the Board XPUa/XPUb

350TRX/XPUa 640TRX/XPUb

No. of XPUa=TRX No./350TRX No. of XPUb=TRX No./640TRX

For GSM only system, we can be configured just one main control XPU, whi

ch configured as RGCP

The control panel optimized for BSC6900, XPUa/XPUb can congfigured in d

ifferent subrack with Transcode board and interface board averagely.

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Specification of the Interface Board

Physical

Board

Function Interface TypeAbis Ater A Gb Pb

POUc TDM+ HDLC

512TRX 7168CIC 3906CIC 395Mbps mBSC V9R11

IP 2048TRX 23040CIC

23040CIC    

FG2c IP 2048TRX   23040 790Mbps  GOUc IP 2048TRX   23040 790Mbps  EIUa Abis

TDM256TRX        

Ater TDM   968CIC      Pb TDM         968CICA TDM     968CIC    

OIUa Abis TDM

512TRX        

Ater TDM   1890CIC      Pb TDM         1890CICA TDM        

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Typical Configuration Parameter Description

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Typical Configuration Parameter Description

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