02 Omd902100 Bsc6900 (Go) Hardware System Issue1.01

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Confidential Information of Huawei. No Spreading Without Permission

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www.huawei.com

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

BSC6900 GOHardware System

BSC6900 is an important network element(NE) of Huawei Single RAN solution. Itadopts the industry-leading multiple radio access technologies (RATs), IP transmission mode, and modular design. In addition, it is integrated with the functions of the UMTS RNC and GSM BSC, thus efficiently maintaining the trend of multi-RAT convergence in the mobile network.The BSC6900 can be flexibly configured as a BSC6900 GSM, BSC6900 UMTS, or BSC6900 GU as required in different networks.

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Page1Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved.

ForewordThe 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, high performance, and low power consumption

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ReferencesBSC6900 Technical Description

BSC6900 Product Description

BSC6900 Hardware Description

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ObjectivesUpon 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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Contents1. System Description

2. Hardware Structure

3. System Signal Flow

4. Typical Configuration

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Location of the BSC6900The HUAWEI BSC6900 is a new generation GSM BSC

product after BSC6000 and BSC6810

The interfaces between the BSC6900 GSM and each NE in the GSM network are as follows: Um: the interface between the BTS and the MS Abis: the interface between the BSC6900 GSM and the BTS A: the interface between the BSC6900 GSM and the Mobile Switching Center (MSC) or Media Gateway (MGW) Gb: the interface between the BSC6900 GSM and the Serving GPRS Support Node (SGSN) The A, Um, and Gb interfaces are standard interfaces, through which equipment from different vendors can be interconnected. The BSC6900 GSM performs functions such as radio resource management, base station management, power control, and handover control.

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High Integration and Low CostSupports 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

The BSC6900 GSM in BM/TC separated mode or A over IP mode supports 3,072 TRXs in a single cabinet. It caters to the mobile network requirements for higher capacity with fewer sites, thus requiring less space in the equipment room and reducing the power consumption. In addition, the BSC6900 GSM supports the simultaneous activation of up to 12,288PDCHs, thus meeting the increasing requirements for packet service growth and saving the cost of packet equipment

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Features of the BSC6900 SystemHigh integration and low cost

Easy configuration and convenient maintenance

All-IP platform

Smooth evolution for investment protection

Web-based LMT

The BSC6900 GSM has a small number of board types. In addition to transmission boards, the BSC6900 GSM cabinet accommodates boards such as network switching boards, signaling processing boards, and service processing boards. The simplification of board types reduces the maintenance cost. The interface boards and service boards, not bound together, are flexible in configuration and easy to maintain and expand.

Based on its all-IP platform, the BSC6900 GSM betters the PS service performance.The Abis, A, and Gb interfaces support IP transmission, which provides sufficient bandwidth and saves transmission cost. The IP-based platform and interface meet the trend of flattened network and the requirements for network evolution. The BSC6900 GSM is compatible with the hardware of the BSC6000. Through software loading, the BSC6000 in the existing network can be upgraded to the BSC6900 GSM. The BSC6900 GSM can be upgraded to the BSC6900 GU through addition of the UMTS boards and software upgrade. This facilitates the deployment of a 3G network and protects the investment of the operator.

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Flexible ConfigurationHardware Configuration

BM/TC Separated Mode

BM/TC Combined Mode

A over IP Mode

In BM/TC combined mode, the BSC is not configured with the TCS. The boards that implement the TC functions are inserted into the slots in the MPS or EPS. With the same capacity, less cabinets and less subracks are required in the BSC, thus increasing the hardware integration.

When the BSC is located in a remote equipment room, it is configured in BM/TC separated mode. The BSC is configured with a separate TCS, which is located in the TCR on the MSC side. Thus, the transmission resources between the BSC and the MSC are saved.

In A over IP mode, the BSC directly connects to the Huawei core network without using the TC, thus protecting the operator's investment and improving the voice quality due to the reduction of encoding and decoding. The A over IP mode meets the needs for network evolution.

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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

BSC6900 GSM Only

BSC6900 UMTS Only

BSC6900 Dual mode

BSC6900 GSM Only

BSC6900 UMTS Only

BSC6900 Dual mode

SW upgrade with Legacy HW + New HW (optional)

SW upgrade with Legacy HW + New HW (necessary)

The BSC6900 can be flexibly configured as a BSC6900 GSM, BSC6900 UMTS, or BSC6900 GU as requried in different networks. With the support of EDGE+, the BSC6900 GSM can be upgraded to the BSC6900 GU through additon of UMTS boards and software upgrade.

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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 DesignGSM&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: 2G/3G Maintenance more easy and intuitionistic

Centralized OMC for GSM&UMTS, unified platform for network construction, 2G/3G network planning, performance evaluation and trouble shooting etc.Simplifying the network architecture, reducing co-ordination and maintenance effort, man power and OPEX Saving

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pTR

AU

pTR

AU

IPUNI-BTS

UNI-BSCCo-transmission

UDP

IP

/

PPP

IP SW

Router

FP FP FP

3G

2G3G

2G

pTR

AU

pTR

AU

FPFPFPUDP

IP

/

PPP

IP SW

Router

Interface board

Feature of BSC6900－Co TRM

With unified transport resource management, bandwidth can be shared by UMTS&GSM.

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UMTS

GSM

Voice 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, networkusage efficiency improved

3G/2G cell load consideration make it more accurate for the service direction, betterperformance achieved

Huawei Lab Simulation

Feature of BSC6900－Co RRM

The performance improvement value (>23%&1.4%) are based on Huawei simulation result.

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Contents2. Hardware Structure

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)

•Meets the requirements in ETSI EN300 386 •Meets the requirements in Council directive 89/336/EEC

EMC

-40 V to -57 VInput voltage range

-48 VRated input voltage

•Empty cabinet ≤ 100 kg •Cabinet in full configuration ≤ 300 kg

Weight

46 UHeight of the available space

2,200 mm (height) x 600 mm (width) x 800 mm (depth)Dimensions

SpecificationItem

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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)

(6) Rear cable trough

(5) Cable rack

(4) Power distribution box

(3) Air defense frame

(2) Subrack(1) Filler panel

MPROnly one MPR is configured in the BSC6900.EPRThe number of EPRs to be configured depends on the traffic volume, but only one EPR can be configured in the BSC6900. You can also choose not to configure an EPR.TCRThe number of TCRs to be configured depends on the traffic volume and the configuration modes of subracks. Up to two TCRs can be configured in the BSC6900. You can also choose not to configure a TCR.

Three rear cable troughs are configured.Rear Cable Trough

Two air defense frames are configured.Air Defense Frame

The MPR is configured with one main processing subrack (MPS) and depending on the traffic volume, zero to two extended processing subracks (EPSs) or transcodersubracks (TCSs). The EPR is configured with one to three EPSsor TCSs, depending on the traffic volume. The TCR is configured with one to three TCSs, depending on the traffic volume.

Subrack

Only one power distribution box is configured.Power Distribution Box

ConfigurationComponent

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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

MPROnly one MPR is configured in the BSC6900.EPRThe number of EPRs to be configured depends on the traffic volume, but only one EPR can be configured in the BSC6900. You can also choose not to configure an EPR.TCRThe number of TCRs to be configured depends on the traffic volume and the configuration modes of subracks. Up to two TCRs can be configured in the BSC6900. You can also choose not to configure a TCR.

Three rear cable troughs are configured.Rear Cable Trough

Two air defense frames are configured.Air Defense Frame

The MPR is configured with one main processing subrack (MPS) and depending on the traffic volume, zero to two extended processing subracks (EPSs) or transcodersubracks (TCSs). The EPR is configured with one to three EPSsor TCSs, depending on the traffic volume. The TCR is configured with one to three TCSs, depending on the traffic volume.

Subrack

Only one power distribution box is configured.Power Distribution Box

ConfigurationComponent

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Power Distribution Box

subrack1

subrack0

subrack2

POWER BOX

subrack0

(3) Label for power distribution

switches

(2) Power distribution

switches

(1)

PAMU

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2.1 Cabinets

2.2 Subracks

2.3 Boards

2.4 Cables

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Subrack

(9) Cover plate of the DIP switch

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

(7) DC power input port

(6) Grounding screw(5) Boards(4) Front

cable trough

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

500mm

436mm

12U

The main components of the subrack are the fan box, slots, front cable trough, and backplane.Specification:

In compliance with the IEC60297 standard, each subrack is 19 inches in width and 12 U in height.

1U=44.45mm=1.75inch.Weight of Empty subrack: 25 kg; Weight of subrack configured with boards: ≤ 57 kg

The DIP switch with 8 bits on the subrack is used to set the number of the subrack.

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Dip Switch on the Subrack

ONONOFFONOFFOFFONON

001015

ONONOFFONONOFFONOFF

001004

ONONONOFFOFFOFFONON

000113

ONONONOFFONOFFONOFF

000102

ONONONONOFFOFFONOFF

000011

ON ON ON ON ON OFF ON ON

000000

87654321Bit

Subrack No.

The DIP switch on the subrack has eight bits from 1 to 8

As the DIP switch uses odd parity check, the number of 1s in the eight bits must be an odd number. The method for setting the bits is as follows:

Set bits 1 through 5 and bit 8.Set bit 7 to ON.Check the number of 1s in the bits of the DIP switch.

If the number of 1s is even, set bit 6 to OFF.

If the number of 1s is odd, set bit 6 to ON.

Bit 8 is used to set the startup mode of the SCUa board. The description of this bit is as follows:

When this bit is set to ON, the SCUa board is not in auto-startup mode. In this

case, the SCUa board must be started by the loading from the OMUa board. When this bit is set to OFF, the SCUa board is in auto-startup mode. In this

case, the SCUa board checks the validity of the Flash file before it is started. If the

Flash file is valid, the SCUa board is started by the loading from the Flash memory.Otherwise, the SCUa board is started by the loading from the OMUa board.

Bit 8 is set to OFF for the BSC6900.

8

Reserved, undefined, generally set to ON7

Odd parity check bit6

Bits 1 to 5 are used for setting the subrack number. Bit 1 is the least significant bit. If the bit is set to ON, it indicates 0. If the bit is set to OFF, it indicates 1.1-5

DescriptionBit

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Slots in the Subrack

(3) Rear slot

(2) Backplane

(1) Front slot

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

the backplane

Each subrack provides a total of 28 slots. The 14 slots on the front side of the backplane are numbered from 00 to 13, and those on the rear side from 14 to 27.Two neighboring slots, such as slot 00 and slot 01 or slot 02 and slot 03, can be configured as a pair of active/standby slots. A pair of active and standby boards must be installed in a pair of active and standby slots.

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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 in

the MPR. Only one MPS is configured in the BSC6900

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Main Processing Subrack (MPS)BSC6900 must have only one MPS

Front Board

Rear Board

Every board in MPS occupies 1 slot except OMU board which occupied 2 lots.In BM/TC combined configuration mode, the MPS must be configured with the OMUaboard, TNUa board, SCUa board, GCUa board, XPUa board, DPUc board, and DPUdboard. The EIUa board, OIUa board, GOUa board, and FG2a/PEUa board are optional boards. The INT board (interface board) can be the PEUa board, EIUa board, OIUa board, FG2a board, or GOUa 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 the

GCUa and OMUa

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Extended Processing Subrack (EPS)

Front Board

Rear Board

BSC6900 has no EPS or up to 4 EPS for GSM

In BM/TC separated configuration mode, the EPS must be configured with the TNUaboard, SCUa board, XPUa board, and DPUd board. The DPUc board, GOUa board, EIUa/OIUa board, and PEUa/FG2a board are optional boards. In BM/TC combined configuration mode, the EPS must be configured with the TNUaboard, SCUa board, XPUa board, DPUc board, and DPUd board. The EIUa board, OIUa board, and FG2a/PEUa board are optional boards.Note: The INT board (interface board) can be the PEUa board, EIUa board, OIUaboard, FG2a board, or GOUa board.EPS has 14 slots in the front panel and another 14 slots in the back panel.The differences between MPS and EPS follow:

No GCU board,no OMU board in EPS.Slot 0-5 are fixed for the SPU board,slot 6,7 are fixed for SCU,slot 12,13 are fixed for DPU board,slot 20-23 are fixed for OMU board,slot 20-27 are fixed for Interface board

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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

BSC6900 has up to 4 TCS for GSM

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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 Processin

g Subsyste

m

Service Processing Subsystem

OM Subsystem

To BTS

To MSC

To other BSC

To SGSN

Clock (optional)

Besides, the BSC6900 has the power subsystem and environment monitoring subsystem.

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Switching SubsystemThe 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

The switching subsystem consists of the SCUa boards, TNUa boards, high-speed backplane channels in each subrack, crossover cables between SCUa boards, and inter-TNUa cables

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Switching Subsystem (Cont.)

The switching subsystem consists of two types of logical modules: MAC switching and TDM switching. It show the position of the switching subsystem in the overall structure of the system, with the modules highlighted in apricot.

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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

In the switching subsystem of the BSC6900, the star topology is established among the MAC switching logical modules, and the mesh topology is established among the TDM switching logical modules.

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TNUa BoardThe TNUa board performs the following

functions:

Provides 128 k * 128 k TDM switching

Allocates the TDM network resources

The TNUa board provides the TDM switching and serves as the switching center for the CS services of the entire system.

SMB

male

Test the timing signal output TESTOUT

RJ45Receiving the 8 kHz and the 1PPS

timing signals from the

GCUa/GCGa

CLKIN

RJ45Serial port for commissioningCOM

RJ45For inter-subrack connection10/100/1000BASE-

T

TypeFunctionPort Name

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SCUa BoardThe 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

The SCUa board provides the maintenance management and GE switching platform for the subrack in which it is located. Thus, the BSC6900 internal MAC switching is implemented and the internal switching in turn enables complete connection between all modules of the BSC6900.

SMB

male

Test the timing signal output TESTOUT

RJ45Receiving the 8 kHz and the 1PPS

timing signals from the

GCUa/GCGa

CLKIN

RJ45Serial port for commissioningCOM

RJ45For inter-subrack connection10/100/1000BASE-

T


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Service Processing SubsystemThe 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

Service processing subsystems can be increased as required according to the linear superposition principle. Thus, the service processing capability of the BSC6900 is expanded.Service processing subsystems communicate with each other through the switching subsystem to form a resource pool and perform tasks cooperatively.

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Service Processing Subsystem

The service processing subsystem mainly consists of two logical modules: BSC control plane (CP) and BSC user plane (UP). Figure shows the position of the service processing subsystem in the overall structure of the system, with the modules highlighted in apricot

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XPUa BoardThe XPUa board performs the following

functions:

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

RJ45

10M/100M/1000M Ethernet ports

10/100/1000BASE-T0

to 10/100/1000BASE-

T3


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DPUc BoardThe DPUc 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

Provides the voice enhancement function

Detects voice faults automatically

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DPUd BoardThe 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

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Clock Synchronization Subsystem

INT

INT

SCUa

INT

INT

SCUa

SCUa

GCUa

Clock module

MPS

8kHz

To BTSEPS 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

The clock synchronization subsystem can provide the following clock sources: Building Integrated Timing Supply System (BITS) clock, Global Positioning System (GPS) clock, LINE clock, and external 8 kHz clock. It ensures the reliability of the clock signals. The BSC6900 provides reference clock sources for base stations. Clock signals are transmitted from the BSC6900 to base stations over the Iub interface. The clock synchronization subsystem provides clock signals for the BSC6900, generates the RNC Frame Number (RFN), and provides reference clock signals for base stations. The position of the clock synchronization subsystem in the overall structure of the system.

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GCUa BoardThe 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

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Interface Processing SubsystemInterface board category

GOUaGE

POUcSTM-1Optical port

PEUaE1

FG2cFE/GEElectrical port

IP

OIUaOptical port

EIUaElectrical portTDM

INT

BoardPort TypeTransport Mode

Board Type

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EIUa BoardThe 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

Supporting the A, Abis, and Ater interfaces

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OIUa BoardThe 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, and Ater interfaces

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FG2c BoardThe FG2c board performs the following

functions:

Provides 12 channels over FE ports or four

channels over GE electrical ports

Provides the routing-based backup and load

sharing

Supports the Abis, A, and Gb interfaces

10M/100M/1000M

10M/100M

As an interface board, the FG2c board supports IP over Ethernet transmission

SMB male connector

Not used in RNC2M0 and 2M1

RJ4510M/100M/1000M Ethernet ports, used to transmit 10/100/1000M signals

10/100/1000BASE-T

RJ4510M/100M Ethernet ports, used to transmit 10/100M signals

10/100BASE-T

Connector TypeFunctionPort

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PEUa BoardThe 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

Ports on the PEUa Board

SMB male 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 upper-level devices and serve as the clock sources of the BSC6900 system.

2M0 and 2M1

DB44E1/T1 port, used to transmit and receive E1/T1 signals on channels 24-31

E1/T1 (24-31)


E1/T1 (16-23)


E1/T1 (8-15)


E1/T1 (0-7)

Connector Type

FunctionPort

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POUc Board The POUc board performs the following functions:

Provides four 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

Ports on the POUc Board

SMB male connector

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

2M0 and 2M1

TX

LC/PCOptical port, used to transmit and receive optical signals. TX refers to the transmitting optical port, and RX refers to the receiving optical port.

RX

Connector Type

FunctionPort

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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 the Abis, A, and Gb interfaces

Ports on the GOUc board

SMB male connector

Not used in RNC2M0 and 2M1

TX

LC/PCOptical port, used to transmit and receive optical signals. TX refers to the transmitting optical port, and RX refers to the receiving optical port.

RX

Connector TypeFunctionPort

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OM Subsystem

SCUa

SCUa

HUB

OMUa

OMUa

SCUa

SCUa

Alarm box LMT

External network

MPS

To M2000

Internal network

EPS

Internet cable

serial cable

The OM subsystem enables the management and maintenance of the BSC6900 in the following scenarios: routine maintenance, emergency maintenance, upgrade, and capacity expansion

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OMUa BoardOMUa 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

Ports on the OMUa Board

(18) Screws for fixing the hard disk

(17) Hard disks

(16) OFFLINE LED

(15) HD LEDs(14) VGA port (13) COM port

(12) ETH2 Ethernet port



(9) USB port

(8) SHUTDOWN Button

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

(4) RUN LED (3) Self-locking latch

(2) Ejector lever (1) Captive screw

Monitor portVGA

DB-9Serial port. This port is used for system commissioning or for common serial port usage.

COM-ALM/COM-BMC

RJ45GE ports.ETH0 to ETH2

USB ports. These ports are used to connect USB devices.

USB0-1 and USB2-3

Connector Type

FunctionPort

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2.1 Cabinets

2.2 Subracks

2.3 Boards

2.4 Cables

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Main Cables

Trunk Cables

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

120Ω twisted pair cable and Active/Standby 120Ω twisted pair

cable

Network cables

Optical Fibers

Y-Shaped Clock Cable

PDB Monitoring Signal Cable

Course Name


P-55


Trunk Cables75-ohm Coaxial Cable /120-ohm Twisted Pair Cable

(4) Metal case of the DB44 connector(3) Label (Identifying a coaxial cable/twisted pair cable)

(2) Main label (Identifying the code, version, and manufacturer information of the cable)

(1) DB44 connector

The 75-ohm coaxial cable is a type of trunk cable. It is optional. The number of 75-ohm coaxial cables to be installed depends on site requirements. This cable connects the active/standby AEUa/PEUa board to the Digital Distribution Frame (DDF) or other NEs and transmits E1 trunk signals.The 75-ohm coaxial cable used in the BSC6900 has 2 x 8 cores. That is, the 75-ohm coaxial cable is composed of two cables, each of which contains eight micro coaxial cables. All of the 16 micro coaxial cables form eight E1 RX/TX links.The 75-ohm coaxial cable has a DB44 connector at only one end. You need to make a connector at the other end as required on site. The 120-ohm twisted pair cable is a type of trunk cable. It is optional. The number of 120-ohm twisted pair cables to be installed depends on site requirements. This cable connects the active/standby AEUa/PEUa board to the DDF or other NEs and transmits E1 signals. The 120-ohm twisted pair cable has a DB44 connector at only one end. You need to make a connector at the other end as required on site.

Course Name


P-56


Trunk Cables (Cont.)Active/Standby 75-ohm Coaxial Cable

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

manufacturer information of the cable)

(3) Label (Identifying a coaxial cable)

(5) Label 2

(identifying a coaxial

cable)

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

The active/standby 75-ohm coaxial cable has two DB44 connectors at only one end. You need to make connectors at the other end as required on site.

Course Name


P-57


Trunk Cables (Cont.)Active/Standby 120-ohm Twisted Pair Cable

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

manufacturer information of the cable)

(3) Label 1 (identifying a twisted pair cable)

(5) Label 2

(identifying a twisted

pair cable)

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

The 120-ohm twisted pair cable has a DB44 connector at only one end. You need to make a connector at the other end as required on site.

Course Name


P-58


Ethernet CableStraight-Through Cable

The straight-through cable is of two types: the shielded straight-through cable and the unshielded straight-through cable.

The unshielded straight-through cable is used to connect the SCUa boards in different subracks.

The shielded straight-through cable is used to connect the FG2a/OMUa/FG2c board to other devices. The number of straight-through cables to be installed depends on the site requirements.

Course Name


P-59


Optical CablesOptical cables are used to connect the optical interface

board to the Optical Distribution Frame (ODF) or other NEs.

The optical cable has an LC/PC connector at one end connected to the optical interface board in the BSC6900. The other end of the optical cable can use an LC/PC connector, SC/PC connector, or FC/PC connector.

Course Name


P-60


Y-Shaped Clock CableThis cable transmits the 8 kHz

clock signals from the

GCUa/GCGa board in the MPS

to the SCUa board in the EPS.

(2) RJ45 connector (1) Label (identifying a pair of

twisted pair cables)

When the straight-through cable is used to connect the SCUa boards of different subracks, the two ends of the cable are connected to the SCUa boards which are located in different subracks.When the straight-through cable is used to connect the OMUa board to the LAN of the customer, the RJ45 connector at one end of the cable is connected to the ETH0 or the ETH1 port on the OMUa board, and the RJ45 connector at the other end of the cable is connected to the Ethernet port of the LAN of the customer.

Course Name


P-61


PDB Monitoring Signal Cable The power distribution box (PDB) monitoring signal cable is

used to transmit monitoring signals from the PDB to the

subracks.

The DB15 connector at one end of the PDB monitoring signal cable is connected to the port on the PDB for the service subrack. The DB9 connector at the other end of the cable is connected to the MONITOR port on the metal shielding board of the lowest subrack in the cabinet.

Course Name


P-62


QuestionsHow many subsystems does BSC6900 have? And what are

they?

How to set the dip switches for MPS?

Course Name


P-63






Course Name


P-64


BSC6900 Signal FlowsUser-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

Course Name


P-65


GSM CS Signal Flow Abis over TDM and A over TDM

the CS signal flow on the uplink is as follows: The uplink CS signals are sent from the BTS to the Abis interface board in the MPS/EPS. The CS signals are demultiplexed in the Abis interface board. Each CS signal uses a 64 kbit/s timeslot and is transmitted to the Ater interface board through the TNUa board. The CS signals are multiplexed in the Ater interface board. Each full-rate CS signal uses a 16 kbit/s sub-timeslot, and each half-rate CS signal uses an 8 kbit/s sub-timeslot. The CS signals are then transmitted to the Ater interface board in the TCS over the Ater interface. The CS signals are demultiplexed in the Ater interface board of the TCS. Each CS signal uses a 64 kbit/s timeslot and is transmitted to the DPUc board through the TNUa board. The DPUc board performs speech codec and rate adaptation on the CS signals, which are converted into 64 kbit/s PCM signals. The 64 kbit/s PCM signals are transmitted to the A interface board through the TNUa board and then to the MSC over the A interface.

Course Name


P-66


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

the CS signal flow on the uplink is as follows: The uplink CS signals are sent from the BTS to the Abis interface board in the MPS/EPS. The CS signals are transmitted from the Abis interface board to the DPUcboard through the SCUa board. The DPUc board reorders PTRAU frames, eliminates jitter, and converts PTRAU frames into TRAU frames. Then, the TRAU frames are transmitted to the Ater interface board through the TNUa board. The CS signals are multiplexed in the Ater interface board in the MPS/EPS, and then are transmitted to the Ater interface board in the TCS. The CS signals are demultiplexed in the Ater interface board of the TCS. Each CS signal uses a 64 kbit/s timeslot and is transmitted to the DPUc board through the TNUa board. The DPUc board performs speech codec and rate adaptation on the CS signals, which are converted into 64 kbit/s PCM signals. The 64 kbit/s PCM signals are transmitted to the A interface board through the TNUa board and then to the MSC over the A interface.

Course Name


P-67


GSM CS Signal Flow Abis over HDLC/IP and A over IP

the CS signal flow on the uplink is as follows: The uplink CS signals are sent from the BTS to the Abis interface board in the MPS/EPS. The Abis interface board encapsulates the CS signals in PTRAU frames, which are then transmitted to the DPUc board through the SCUa board. The DPUc board converts PTRAU frames into RTP frames, reorders RTP frames, and eliminates jitter. The SCUa board transmits the CS signals to the A interface board, and then the A interface board transmits the signals to the MGW over the A interface.

Course Name


P-68


GSM PS Signal Flow Abis over TDM

the PS signal flow on the uplink is as follows: The packet data is sent from the BTS to the Abis interface board in the MPS/EPS. The data uses one to four 16 kbit/s sub-timeslots on the Abisinterface, depending on the modulation and coding scheme, for example, CS1-CS4 or MCS1-MCS9. The Abis interface board transmits the packet data to the TNUa board, which then transmits the data to the DPUd board. The DPUd board converts the frame format and then transmits the data to the Gb interface board through the SCUa board. The Gb interface board processes the packet data according to the IP or FR protocol and then transmits it to the SGSN over the Gb interface.

Course Name


P-69


Signaling Flow on the A Interface A over TDM

the uplink signaling flow on the A interface is as follows: In the MPS/EPS, the signaling processing board processes the signaling according to the MTP3, SCCP, and BSSAP protocols. Then, the signaling is transmitted to the Ater interface board through the SCUa board. The Ater interface board processes the signaling according to the MTP2 protocol. Then, the signaling is transmitted to the Ater interface board in the TCS. In the TCS, the Ater interface board transparently transmits the signaling to the TNUa board and then to the A interface board. Then, the signaling istransmitted to the MSC over the A interface.

Course Name


P-70


Signaling Flow on the A Interface A over IP

the uplink signaling flow on the A interface is as follows: In the MPS/EPS, the signaling processing board processes the signaling according to the BSSAP, SCCP, SCTP, and M3UA protocols. Then, the signaling is transmitted to the A interface board through the SCUa board. The A interface board processes the signaling according to the IP protocol. Then, the signaling is transmitted to the MSC server through the MGW.

Course Name


P-71


Signaling Flow on the Abis Interface

Abis over TDM/IP/HDLC

the uplink signaling flow on the Abis interface is as follows: The signaling is transmitted to the Abis interface board in the MPS/EPS over the Abis interface and then transmitted to the SCUa board. The SCUa board transmits the signaling to the signaling processing board.

Course Name


P-72


Signaling Flow on the Gb Interface Gb over IP/HDLC

the uplink signaling flow on the Gb interface is as follows: In the MPS/EPS, the signaling processing board processes the signaling according to the NS and BSSGP protocols. Then, the signaling is transmitted 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 SGSN over the Gb interface.

Course Name


P-73






Course Name


P-74


Typical Configuration of BSC6900

2Number of cabinets

395

3072

768

4875

1312

1MPS+1TC

S

Gb interface throughput

（Mbps）

Number of active PDCHs

（MCS-9）

TRX number

Traffic（Erl）

BHCA(K)

Index

When the R11 boards are configured

TCSMPS

MPR TCR

Course Name


P-75



2Number of cabinets

790

7680

1920

12187

3281

1MPS+1EPS+2TC

Ss


（Mbps）


（MCS-9）

TRX number

Traffic（Erl）

BHCA(K)

Index


TCSMPS

MPR TCR

EPS TCS

Course Name


P-76



790

12288

3072

19500

5250

2

1MPS+2EPSs+2TC

SsNumber of cabinets


（Mbps）


（MCS-9）

TRX number

Traffic（Erl）

BHCA(K)

Index


TCSMPS

MPR TCR

EPS TCS

EPS

Course Name


P-77


SummaryAfter this course, we have learned the position of BSC6900

in 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

Course Name


P-78


Glossary EPS: Extended Processing Subrack

MPS: Main Processing Subrack

TCS: TransCoder Subrack

LMT: Local Maintenance Terminal

Course Name


P-79

Thank youwww.huawei.com

Course Name


P-80


Appendix 1: Training Icons

Foreword Objectives Contents Question Summary Reference

Course Name


P-81


Color UsageColor Usage Guidelines:

The following colors are corporate colors and supporting colors . Wit both usage of colors creates an harmonies effect.The value of the colors should not be changed. No other colors should be used. Only the suggested colors can be used. For the usage of the supporting colors, only vertical and horizontal should be used thus able to reflex the harmony.

Color platelet:Corporate Colors

Supporting Colors

RGB:153/0/0 RGB:0/0/0 RGB:51/51/51 RGB:153/153/153 RGB:204204 RGB:255/255/255

RGB:255/204/102 RGB:255/204/153 RGB:204/255/153 RGB:204/204/255 RGB:153/204/255 RGB:153/204/204

RGB:153/102/10 RGB:255/153/0 RGB:102/153/0 RGB:0/102/153 RGB:0/153/204 RGB:0/153/153

02 Omd902100 Bsc6900 (Go) Hardware System Issue1.01

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Transcript of 02 Omd902100 Bsc6900 (Go) Hardware System Issue1.01