omd902100 bsc6900 hardware system issue1.10

8/12/2019 Omd902100 Bsc6900 Hardware System Issue1.10

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www.huawei.com

Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved.

BSC6900

Hardware System


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Copyright 2009 Huawei Technologies Co., Ltd. All rights reserved. Page2

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, highintegration, high performance, and low power consumption


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References

BSC6900 Technical Description

BSC6900 Product Description

BSC6900 Hardware Description


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Objectives

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

Understand BSC6900 function and features

Master BSC6900 hardware structure

Detail the signal flows in BSC6900

List the typical hardware configuration of BSC6900


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Contents

1. System Description

2. Hardware Structure

3. System Signal Flow

4. Typical Configuration


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Location of the BSC6900

The HUAWEI BSC6900 is a new generation GSM BSC

product after BSC6000 and BSC6810


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High Integration and Low Cost

Supports 3,072 TRXs in a single cabinet

Supports the simultaneous activation of up to 12,288

PDCHs

Maximum of traffic: 19,500 Erl; BHCA : 5,250,000


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Features of the BSC6900 System

High integration and low cost

Easy configuration and convenient maintenance

All-IP platform

Web-based LMT


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Flexible Configuration

Hardware Configuration

BM/TC Separated Mode

a) TC Local

b) TC remote

BM/TC Combined Mode

A over IP Mode


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BSC6900 Evolution Paths

SW upgrade with Legacy HW

+ New HW (necessary)

SW upgrade with Legacy

HW + New HW (optional)

200920082006GBSS8.1/RAN10 GBSS9.0/RAN11 GBSS12.0/RAN12

BSC6000

BSC6810

BSC6900GSM Only

BSC6900UMTS Only

BSC6900Dual mode

BSC6900GSM Only

BSC6900UMTS Only

BSC6900Dual mode


HW + New HW (optional)


HW + New HW (necessary)


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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 Design

GSM&UMTSco-cabinet

Software

UpgradeRNC

RNC

BSC

BSC

BSC

RNC

RNC

RNC

BSC

GSM&UMTScabinet


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Feature of BSC6900Co OAM

Unified CME :

Simultaneous 2G/3G data

configuration, correctness

and efficiency guaranteed

Unified WEB LMT for

maintenance: 2G/3G

Maintenance more easy andintuitionistic


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pTRAU

pTRAU

IPUNI-BTS

UNI-BSCCo-transmission

UDP

IP/

PPP

IP SW

Router

FP

FP

FP

3G

2G

3G

2G

pTRAU

pTRAU

FP

FP

FP

UDP

IP

/

PPP

IP SW

Router

Inter

face

board

Feature of BSC6900Co TRM


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UMTS

GSM

Voice PS service

Service direction on UMTS/GSM

Heavy

Load

Heavy

Load

Heavy

Load

Heavy

Load

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, betterperformance achieved

Huawei Lab Simulation

Feature of BSC6900Co RRM


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Contents






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Contents


2.1 Cabinets

2.2 Subracks

2.3 Boards

2.4 Cables


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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

600mm

2200mm

800mm

600mm

2200mm

800mm

N68E-22 Cabinet (Single-door/Double-

door)


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Components of the Cabinet

Based on functions,

cabinets are classified into

the main processing rack

(MPR), extended

processing rack (EPR), and

transcoder rack (TCR)

(1) Filler

panel

(2) Subrack

(3) Air

defense

frame

(4) Power

distribution box

(5) Cable rack (6) Rear cable

trough


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Components of the Cabinet

1 EPS

0 MPS

2 EPS

POWER BOX

MPR

4

3 EPS

5

POWER BOX

EPR

7 TCS

6 TCS

8 TCS

POWER BOX

TCR


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Power Distribution Box

subrack1

subrack0

subrack2

POWER BOX

subrack0

(1)

PAMU

(2) Power distribution

switches

(3) Label for power distribution

switches


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Contents


2.1 Cabinets

2.2 Subracks

2.3 Boards

2.4 Cables


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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

500mm

436mm

12U


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Dip Switch on the Subrack

Subrack No.Bit

1 2 3 4 5 6 7 8

00 0 0 0 0

ON ON OFFON ON ON ON ON

11 0 0 0 0

OFF ON OFFOFF ON ON ON ON

20 1 0 0 0

OFF ON OFFON OFF ON ON ON

31 1 0 0 0

ON ON OFF

OFF OFF ON ON ON

40 0 1 0 0

OFF ON OFFON ON OFF ON ON

51 0 1 0 0

ON ON OFFOFF ON OFF ON ON

The DIP switch on the subrack has eight bits from 1 to 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


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Main Processing Subrack (MPS)

The MPS processes the basic services and performs the

O&M function. In addition, the MPS provides clock for the

system

As the main processing subrack, the MPS is configured inthe MPR. Only one MPS is configured in the BSC6900


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Main Processing Subrack (MPS)

BSC6900 must have only one MPS

I

N

T

I

N

T

I

N

T

O

M

U

a

O

M

U

a

I

N

T

I

N

T

I

N

T

I

N

T

I

N

T

14 27262524232221201918171615

Backplane

X

P

U

a

X

P

U

a

X

P

U

a

X

P

U

a

T

N

U

a

T

N

U

a

S

C

U

a

S

C

U

a

D

P

U

d

D

P

U

d

G

C

U

a

G

C

U

a

0 1 1312111098765432

Front Board

Rear Board


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Extended Processing Subrack

(EPS) As the extended processing subrack, the EPS is configured

in the MPR or EPR. It processes the basic services of the

BSC6900

Compared with the MPS, the EPS is not configured with theGCUa and OMUa


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Extended Processing Subrack

(EPS)

Front Board

Rear Board

I

N

T

I

N

T

I

N

T

I

N

T

I

N

T

I

N

T

I

N

T

I

N

T

14 27262524232221201918171615

Backplane

X

PU

a

X

PU

a

X

PU

a

X

PU

a

T

NU

a

T

NU

a

S

CU

a

S

CU

a

D

PU

d

D

PU

d

D

PU

d

0 1 1312111098765432

BSC6900 has no EPS or up to 4 EPS for GSM


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TransCoder Subrack (TCS)

The TCS is the transcoder subrack. In BM/TC separated

configuration mode, the TCS is configured in the MPR, EPR,

or TCR

It performs transcoding, rate adptation, and sub-multiplexing


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TransCoder Subrack (TCS)

Front Board

Rear Board

I

N

T

I

N

T

I

N

T

I

N

T

I

N

T

I

N

T

I

N

T

I

N

T

I

N

T

I

N

T

I

N

T

I

N

T

I

N

T

I

N

T

14 27262524232221201918171615

Backplane

T

NU

a

T

NU

a

S

CU

a

S

CU

a

D

PU

c

D

PU

c

D

PU

c

D

PU

c

D

PU

c

0 1 1312111098765432

BSC6900 has up to 4 TCS for GSM


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Contents


2.1 Cabinets

2.2 Subracks

2.3 Boards

2.4 Cables


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BSC6900 Logical Structure

LMT/M2000

Clock

Synchronization

Subsystem

Switching

Subsystem

Interface

Processing

SubsystemService

Processing

Subsystem

OM Subsystem

To BTS

To MSC

To other BSC

To SGSN

Clock (optional)


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Switching Subsystem

The switching subsystem performs the following functions

Provides intra-subrack Medium Access Control (MAC)

switching

Provides intra-subrack Time Division Multiplexing (TDM)switching

Provides switching channels for traffic data

Provides OM channels

Distributes clock signals to the service processing boards


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Switching Subsystem (Cont.)


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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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TNUa Board

The TNUa board performs the following

functions:

Provides 128 k * 128 k TDM switching

Allocates the TDM network resources

Only supports GSM


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SCUa Board

The SCUa board performs the following

functions:

Provides the maintenance management

function

Provides configuration and maintenance of a

subrack or of the entire BSC6900

Monitors the power supply, fans, and

environment of the cabinet

Enables inter-subrack connections

Supports GSM&UMTS


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Service Processing Subsystem

The service processing subsystem performs the following

functions

Radio resource management and control

Radio access management

Cell broadcast service control

CS service processing

PS service processing


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Service Processing Subsystem


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XPUa Board

The XPUa board performs the following

functions:

There are four logical processing units inside a

XPUa board. It only supports GSM.

Main Processing Unit (MPU): manage the user

panel resources, signaling panel resources, and

the DSP status of the subrack

Signaling Processing Unit (SPU): process the

signaling

Main control XPUa supports 270TRXs and Non-

main control XPUa supports 360TRXs at most


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XPUb Board

The XPUb board performs the following

functions:

There are eight logical processing units inside a

XPUb board. So its processing capability

improves 75%-100% more than XPUa. It only

supports GSM.

Main Processing Unit (MPU): manage the user

panel resources, signaling panel resources, and

the DSP status of the subrack

Signaling Processing Unit (SPU): process the

signaling

Main control XPUb and Non-main control XPUbcan both su ort 640 TRXs at most


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SPUa/SPUb Board

The SPUa/SPUb board performs the

following functions:

The SPUa/SPUb support both GSM and UMTS.

There are four/eight logical units inside a

SPUa/SPUb board. The processing capability

of SPUb improves 75%-100% more than SPUa .


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DPUc Board

The DPUc board performs the following functions:

Provides the speech format conversion and data forwarding

functions

Encodes and decodes voice services

Supports 960 speech transcoding and 3740 frames

conversion

Provides the Tandem Free Operation (TFO) function

Provides the voice enhancement function

Detects voice faults automatically

Only supports GSM


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DPUd Board

The DPUd board performs the following 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

Only supports GSM


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DPUb Board

The DPUb board performs the following functions:

Provides the speech format conversion and data forwarding

functions

Encodes and decodes voice services

Provides the Tandem Free Operation (TFO) function

Performs the functions of the GTP-U, IUUP, PDCP, RLC,

MAC, and FP protocols

Provides the voice enhancement function

Supports GSM and UMTS


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Clock Synchronization 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

8kHz

To BTS

EPS EPS8KHz

19.44MHz, 32.768MHz,8kHz

Clock cableHigh-speed backplane channel

CN BITS GPS

To BTS

To BTS

19.44MHz,

32.768MHz,8kHz

19.44MHz,

32.768MHz,8kHz


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GCUa Board

The GCUa board performs the following functions:

Traces, generates, and maintains the synchronization

clock

The standby GCUa board traces the clock phase of the

active GCUa board. This ensures the smooth output of

the clock phase in the case of active/standby switchover

Supports GSM&UMTS


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Interface Processing Subsystem

Board

Type

Transport

ModePort Type Board

INT

TDM Electrical port EIUa

Optical port OIUa

IP

Electric

al port

FE/GE FG2a/FG2c

E1 PEUa

Optical

port

STM-1 POUc

GE

GOUa/GO

Uc

Interface board category

Support Mode

GSM Only

GSM&UMTS

GSM&UMTS

GSM&UMTS

GSM&UMTS

GSM&UMTS


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EIUa Board

The EIUa board performs the following functions:

Transmits, receives, encodes, and decodes 32 E1s/T1s

Processes signals according to the LAPD protocol, SS7

MTP2 protocol

Provides the Tributary Protect Switch (TPS) function

between the active and standby EIUa boards

Provides the OM links when the TCS is configured on the

MSC side

Supports the A, Abis, Pb and Ater interfaces

Supports 384TRX for Abis interface or 960 CICs for A

interface


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OIUa Board

The OIUa board performs the following functions:

Provides one STM-1 port for TDM transmission with the rate of

155.52 Mbit/s

Processes signals according to the LAPD protocol, SS7 MTP2

protocol

Provides the Automatic Protection Switching (APS) function

between the active and standby OIUa boards

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

side

Supports the A, Abis, Pb and Ater interfaces

Supports 384TRX for Abis interface or 1920 CICs for A interface


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FG2a Board

The FG2a board performs the followingfunctions:

Provides 8 channels over FE ports or 2

channels over GE electrical ports

Provides the routing-based backup and load

sharing

Supports the Abis, A, and Gb interfaces

Supports 384TRX for Abis interface ,6144

CICs for A interface or 128Mbps Gb

throughput


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FG2c Board

The FG2c board performs the followingfunctions:

Provides 12 channels over FE ports or 4

channels over GE electrical ports

Provides the routing-based backup and load

sharing


supports 2048TRX for Abis interface, 23040CICs for A interface or 1024Mbps Gb

throughput

10M/100M/1000M

10M/100M


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PEUa Board

The PEUa board performs the following functions:

Provides 32 channels of E1s/T1s for HDLC transmission

Provides the Tributary Protect Switch (TPS) function between

the active and standby PEUa boards

Transmits, receives, encodes, and decodes 32 channels of

E1s/T1s. The E1 transmission rate is 2.048 Mbit/s; the T1

transmission rate is 1.544 Mbit/s.

Supports the Abis and Gb interfaces

Supports 384TRX for Abis interface or 64Mbps Gb throughput


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POUc Board

The POUc board performs the following functions:

Provides 4 channels over channelized optical STM-1/OC-3 ports

based on IP protocol

Supports the PPP function

Extracts line clock signals

Provides the Automatic Protection Switching (APS) function

between the active and standby POUc boards

Supports the A, Abis, Gb, Ater interfaces

POUc over TDM supports 512TRX for Abis interface,3906 CICs

for A interface or 504Mbps Gb throughput

POUc over IP supports 2048 TRX for Abis interface or 23040

CICs for A interface


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GOUa Board

The GOUa board performs the following functions:

Provides 2 channels over GE optical ports for IP

transmission

Provides the Tributary Protect Switch (TPS) function

between the active and standby boards

Supports the Abis and A interfaces

Supports 384 TRX for Abis interface and 6144 CICs


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GOUc Board

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 2048 TRX for Abis interface, 23040 CICs for A

interface or 1024 Mbps Gb throughput


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OM Subsystem

SC

U

a

SC

U

a

HUB

OM

U

a

OM

U

a

SC

U

a

SC

U

a

Alarm

boxLMT

External

networkMPS

To

M2000

Internalnetwork

EPS

Internet cable

serial cable


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OMUa Board

OMUa board is the Back Administration Module(BAM) of the BSC6900, it performs the following

functions :

Configuration management, performance

management, fault management, security

management, and loading management functions

for the system

Providing with the operation and maintenance

interface for the LMT/M2000 users


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Contents


2.1 Cabinets

2.2 Subracks

2.3 Boards

2.4 Cables


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Main Cables

Trunk Cables

75 coaxial cable and Active/Standby 75-ohm coaxial cable

120 twisted pair cable and Active/Standby 120 twisted pair

cable

Network cables

Optical Fibers

Y-Shaped Clock Cable

PDB Monitoring Signal Cable


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Trunk Cables

75-ohm Coaxial Cable /120-ohm Twisted Pair Cable

(1) DB44 connector (2) Main label (Identifying the code,

version, and manufacturer information of

the cable)

(3) Label (Identifying a coaxial

cable/twisted pair cable)

(4) Metal case of the DB44 connector


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Trunk Cables (Cont.)

Active/Standby 75-ohm Coaxial Cable

(1) DB44 connector (2) Metal case of the DB44 connector

(3) Label (Identifying

a coaxial cable)

(4) Main label (identifying the code, version, and

manufacturer information of the cable)

(5) Label 2

(identifying a coaxial

cable)


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Trunk Cables (Cont.)

Active/Standby 120-ohm Twisted Pair Cable

(1) DB44 connector (2) Metal case of the DB44 connector

(3) Label 1

(identifying a twistedpair cable)

(4) Main label (identifying the code, version, and

manufacturer information of the cable)

(5) Label 2

(identifying a twisted

pair cable)


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Ethernet Cable

Straight-Through Cable


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Optical Cables

Optical cables are used to connect the optical interfaceboard to the Optical Distribution Frame (ODF) or other NEs.


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Y-Shaped Clock Cable

This cable transmits the 8 kHzclock signals from the

GCUa/GCGa board in the MPS

to the SCUa board in the EPS.

(1) Label (identifying a pair of

twisted pair cables)

(2) RJ45 connector


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PDB Monitoring Signal Cable

The power distribution box (PDB) monitoring signal cable isused to transmit monitoring signals from the PDB to the

subracks.


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Contents






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BSC6900 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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GSM CS Signal Flow

Abis over TDM and A over TDM


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GSM CS Signal Flow

Abis over HDLC/IP and A over TDM


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GSM CS Signal Flow

Abis over HDLC/IP and A over IP


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GSM PS Signal Flow

Abis over TDM


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A over TDM


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A over IP


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Signaling Flow on the Abis Interface

Abis over TDM/IP/HDLC

S G f


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Signaling Flow on the Gb Interface

Gb over IP/HDLC

C


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Contents





T i l C fi ti f BSC6900


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Typical Configuration of BSC6900

Index 1MPS+1TC

S

Number of cabinets 1

BHCA(K) 875

TrafficErl 3250

TRX number 512

Number of active PDCHs

MCS-9

2048

Gb interface throughput

Mbps

128

When the R11 boards are configured in BM/TC Combinedmode

MPS

MPR



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Index 1MPS+1TC

S


BHCA(K) 2625

TrafficErl 9750

TRX number 1536


MCS-9

6144


Mbps

384


MPS

MPR

EPS



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Index 1MPS+1TC

S


BHCA(K) 4375

TrafficErl 16250

TRX number 2560


MCS-9

10240


Mbps

640


MPS

MPR

EPS

EPS


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Index 1MPS+1TC

S


BHCA(K) 1750

TrafficErl 6500

TRX number 1024


MCS-9

4096


Mbps

256

When the R11 boards are configured in BM/TC separatemode

TCSMPS

MPR TCR



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Index 1MPS+1TC

S


BHCA(K) 3500

TrafficErl 13000

TRX number 2048


MCS-9

8192


Mbps

512


TCSMPS

MPR TCR

EPS TCS



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Index 1MPS+1TC

S


BHCA(K) 5250

TrafficErl 19500

TRX number 3072


MCS-9

12288


Mbps

768


TCSMPS

MPR TCR

EPS TCS

EPS

S


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Summary

After this course, we have learned the position of BSC6900in GSM network, and the specifications of cabinets,

subracks, boards, cables, functions of subsystems, signal

flows of control-plane and user-plane of each interfaces. At

last, we learned typical configuration of BSC6900

Gl


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Glossary

EPS: Extended Processing Subrack

MPS: Main Processing Subrack

TCS: TransCoder Subrack

LMT: Local Maintenance Terminal


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Thank youwww.huawei.com

omd902100 bsc6900 hardware system issue1.10

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