1. Single RAN MBSC GU Hardware Training

www.huawei.com

Copyright © 2011 Huawei Technologies Co., Ltd. All rights reserved.

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UK VDF Technical Briefing

BSC and RNC HW

Copyright © 2011 Huawei Technologies Co., Ltd.

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Foreword

The BSC6900 is an important network element (NE) of

Huawei Single RAN solution. It adopts the industry-leading

multiple radio access technologies, IP transmission mode,

and modular design. It features high capacity, high

integration, excellent performance, and low power

consumption.

The BSC6900 can be flexibly configured as a BSC6900

GSM only, BSC6900 UMTS only, or BSC6900 GU as

required in different networks

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Contents

1. BSC/RNC 6900 Features Overview 3

2. BSC / RNC 6900 Cabinet and Subrack Overview 9

3. BSC 6900 Subsystems and Boards 19

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BSC6900 - VDF UK Controller

Solution

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High Integration and Effective Investment

Efficient Configuration and Maintenance

All-IP Platform meeting Network Evolution

Requirements

GSM/WCDMA Co-platform and Smooth

Evolution

Based on the NE68E-22 cabinet

Page5

BSC6900 Features


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Flexible Hardware Configuration

GSM has three kinds of Hardware Configuration

BM/TC separated mode*

BM/TC combined mode*

A over IP mode

Division of hardware configuration is not involved in the

BSC6900 UMTS.

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GSM Capacity

Dual Switching Planes (IP+TDM)

The IP plane supports a maximum of 60 Gbit/s switching

capacity.

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

capacity.

A maximum of 16,384 active PDCHs are supported.

Maximum traffic: 24,000 Erl

Comprehensive BHCA: 5,900,000

Gb throughput: 1,536 Mbit/s


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UMTS Capacity

Maximum configuration

100,500 Erlang or 24,000 Mbit/s (UL + DL) PS data

throughput

3,060 NodeBs and 5,100 cells

Single-subrack solution

16,750 Erlang or 4,000 Mbit/s (UL + DL) PS data

throughput

900 NodeBs and 1500 Cells

Page8

16,750

33,500

50,250

67,000

83,750

100,500


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Contents




Page9


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BSC6900 Cabinet

Page10

BSC6900 cabinet

consists of a rack

equipped with 1 to 3

subracks, power

distribution and fans.

Boards are installed in

the front and rear.

FRONT REAR


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Main Processing Rack (MPR)

1 EPS

0 MPS

2 EPS

Power distribution box

MPR

Only one MPR is configured in the BSC6900.

Components of the cabinet:

Main processing subrack (MPS)

Extended processing subrack (EPS)

Power consumption of a GSM MPS ≤ 1200 W

Power consumption of a GSM EPS ≤ 1200 W

Power consumption of a UMTS MPS ≤ 1490 W

Power consumption of a UMTS EPS ≤ 1310 W

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Extended Processing Rack(EPR)

4 EPS

3 EPS

5 EPS


EPR

A BSC6900 can be configured with one EPR or

no EPR.


Extended processing subrack (EPS)

Power consumption of a GSM EPS ≤ 1200 W

Power consumption of a UMTS EPS ≤ 1310 W

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TransCoder Rack (TCR)

A BSC6900 can be configured with 0

to 2 TCRs.


Transcoder subrack (TCS)

Power consumption of a GSM TCS≤

1000 W

7 TCS

6 TCS


TCR

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Power Distribution Box

Subrack 1

subrack 0

Subrack 2


Subrack 0

(1) Power distribution monitoring

board

(2) Run indicator (3) Alarm indicator

(4) Mute switch (5) Power output switch (6) Power output switch labels

2 groups of 48 V inputs in 1+1 hot backup mode

6 groups of independent 48 V outputs


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Subrack

500 mm

436 mm

12 U

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

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

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

the power distribution box

(9) DIP switch


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Slots in the Subrack

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

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

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

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BSC

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RNC

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Contents




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Contents

3. BSC 6900 Subsystems and Boards

Logical Structure

Switching Subsystem

Service Processing Subsystem

Clock Subsystem

Interface Processing Subsystem

OM Subsystem

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BSC6900 Logical Structure

LMT/M2000

Clock

synchronization

subsystem

Switching

subsystem

Interface

processing

subsystem

Service

processing

subsystem

OM

subsystem

To BTS/NodeB

To MSC

To other RNC

To SGSN

Clock

(optional)


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Switching Subsystem

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Switching Subsystem

The switching subsystem performs the following

functions:

Provides data and signaling switching

Intra-subrack Media Access Control (MAC) switching

Intra-subrack Time Division Multiplexing (TDM) switching

Inter-subrack MAC and TDM switching

Provides OM channels

Distributes clock signals to each service board

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Network Topologies Between

Subracks

MAC switching - star topology

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

each of the other nodes. The communication between the

other nodes must be switched by the center node.

TDM switching - mesh topology

There is a connection between every two nodes. When any

node is out of service, the communication between other nodes

is not affected.

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SCUb Board

Functions

Provides the maintenance management function

Monitors the power supply, fans, and environment of the cabinet

Supports the port trunking function

Provides configuration and maintenance of a subrack or the whole

BSC

Provides a total switching capacity of 240 Gbit/s

Distributes clock signals and RFN signals for the BSC6900

Working mode

Located in slots 6 and 7

Working in dual-plane mesh topology

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Interconnections Between SCUb

Boards Inter-subrack cable

connections between

SCUb boards by using

SFP+ high-speed

cables (BM/TC

combined mode)

Blue lines indicate the

SFP+ high-speed

cables.

Green lines indicate

the unshielded

straight-through

cables.

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TNUa Board

Functions

Provides 128 k * 128 k TDM switching

Allocates the TDM network resources

Supports only GSM

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TNUa Board

Diagram of the

Inter-TNUa cabling

between subracks.

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The service processing subsystem performs the

following functions:

User data and signaling processing

Radio channel ciphering and deciphering

Radio resource management and control

System information and user message tracing

Capability of this subsystem can be increased as required.

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High-speed backplane channel

signaling

processing unit

MPS EPS

signaling

processing unit

MPS

SPU 0

SPU 7

processing unit

MPS

SPU 0

SPU 7

Switching Subsystem

DSP 0

DSP 21

DSP 0

DSP 21

Signaling

processing unit

Signaling

processing unit

Data processing

unit

Data processing

unit

MPS EPS

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XPUb Board in BSC The XPUb board has eight logical

subsystems.

Main Control XPUb Board (MPU)

Subsystem 0 of the main control XPUb

board is the Main Processing Unit (MPU).

It is used to manage the user plane

resources, control plane resources, and

transmission resources of the system.

Non-Main Control XPUb Board (SPU)

Subsystems 1 to 7 of the main control

XPUb board belong to the CPU for

Service (CPUS), which is used to

process the services on the control plane.

Work mode: active and standby

signaling

SSN0 MPU

SSN7 SPU

signaling

SSN0 SPU

SSN7 SPU

Main control

XPUb

Non-main control

XPUb

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SPUb Board in RNC

signaling

SSN0 MPU

SSN7 SPU

signaling

SSN0 SPU

SSN7 SPU

Main control

SPUb Non-main control

SPUb

The SPUb board has eight

subsystems.

Main control SPUb board (MPU)

Manages the user plane resources;

manages the load sharing of the user

plane resources between subracks

Maintains the load of the control plane

within the subrack; exchanges the load

information on the control planes

between subracks

Non-main control SPUb board (SPU)

Processes upper-layer signaling over the

Uu, Iu, Iur, Iub, A, Um, Abis, and Ater

interfaces


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DPUg Board

The DPUg board can process the GSM PS services on

up to 1,024 simultaneously active PDCHs where signals

are coded in MCS9

Processes packet links

Detects packet faults automatically.

Work mode: resource pool

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DPUf Board

Components

48 DSP chips

Functions

Converts the speech format and forwards data

Encodes and decodes voice services

Provides the Tandem Free Operation (TFO) function

Provides the voice enhancement function

Detects voice faults automatically

Supports GSM only


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DPUe Board

Components

28 hardware threads

Functions

The DPUe board processes UMTS voice services and data services.

Selects and distributes data

Multiplexes and demultiplexes

Performs the functions of the GTP-U, IUUP, PDCP, RLC, MAC, and FP

protocols

Processes the Multimedia Broadcast and Multicast Service (MBMS) at

the RLC layer and the MAC layer



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Clock Synchronization Subsystem

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Clock Subsystem

I

N

T

I

N

T

S

C

U

a

I

N

T

I

N

T

S

C

U

a

S

C

U

a

GCUa

Clock module

MPS

8 kHz

To

NodeB

EPS EPS 8 kHz

19.44 MHz, 32.768 MHz, 8 kHz

Clock

cable

High-speed backplane

channel

CN BITS GPS*

To BTS

To

MBTS

19.44 MHz, 32.768

MHz, 8 kHz

19.44 MHz, 32.768

MHz, 8 kHz

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GCUa Board

Functions

Extracts timing signals from the external synchronization

timing port and from the synchronization line signals,

processes the timing signals,

and provides the timing signals and the reference clock for the

entire system

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

clock

Generates RFN signals for the system

Supports active/standby switchover


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GCUa Board

Clock cable between

the GCUa board and

the SCUb board

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Transmission

Mode Connector Type Board Supported Mode

TDM

Electrical port EIUa GO

Optical port OIUa GO

POUc GU

IP

Electrical

port

FE/GE FG2a/FG2c GU

E1 PEUa GU

Optical port STM-1

POUa UO

POUc GU

GE GOUa/GOUc GU

ATM

Electrical

port E1 AEUa UO

Optical port Channelized STM-1 AOUa/AOUc UO

Unchannelized STM-1 UOIa/UOIc UO

Interface board categorization

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Transport Subsystem-Interface Board

Board categorization

AEUa

AOUa

UOIa_ATM

PEUa

FG2a

UOIa_IP

GOUa

POUa

Interface

board

ATM

IP

Electrical port

Optical port

Channelized

STM-1

Unchannelized

STM-1

Electrical port

E1

FE/GE

Optical port

Channelized

STM-1

Unchannelized

STM-1

STM-1

GE

TDM

Electrical port E1 EIUa

E1

AOUc

UOIc_ATM

FG2c

POUc

GOUc

Optical port OIUaChannelized

STM-1POUc

Page43

Iub

Iur

Gb

Iub

Iur

IuCS

IUPS

Abis

A


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POUc Board

Functions

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

based on TDM or IP

Supports the Point-to-Point Protocol (PPP)

Provides the line clock recovery function

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

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

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

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

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

as the Gb interface board.

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

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

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GOUc Board

Functions

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

Provides the routing-based backup and load sharing

Supports the extraction of line clock signals

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

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

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

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

board

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UOIc Board

Functions

Provides eight channels over unchannelized STM-1/OC-

3c optical ports

Supports ATM over SDH/SONET

Extracts line clock signals and sends the signals to the

GCUa board

Provides the board-level Automatic Protection Switching

(APS) function

Provides clock signals for NodeBs

Supports the Iu, Iur, and Iub interfaces

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OM Subsystem

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OM Subsystem

S

C

U

a

S

C

U

a

HUB

O

M

U

O

M

U

S

C

U

a

S

C

U

a

Alarm

box LMT

Extranet

MPS

To M2000

Intranet

EPS

Ethernet cable

Serial port

cable

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Dual OM Plane

The OMU works in active and

standby mode.

The active/standby OMU boards

use the same external virtual IP

address to communicate with

the LMT or M2000.

The active/standby OMU boards

use the same internal virtual IP

address to communicate with

the SCU boards.

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OMUc Board

The OMUc board works as a back administration

module (BAM) of BSC6900. It performs the

following functions:

Manages the configuration, performance, and

loading, facilitates troubleshooting, and ensures

security

Provides LMT or M2000 users with an interface for

OM of BSC6900

Difference

An OMUc board occupies only one slot and

contains a single hard disk.

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Hardware Redundancy

Board Redundancy Mode

SCUb Board redundancy + port trunking on GE ports

XPUb SPUb Board redundancy

DPUc/DPUf/DPUg Board resource pool

GCUa Board redundancy

UOIc/POUc Board redundancy + MSP 1:1 or MSP 1+1 optical port redundancy

TNUa Board redundancy

GOUc Board redundancy + GE port redundancy or load sharing

OMUc Board redundancy

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Page 53

Summary

We did an Overview of the Features of BSC/RNC 6900

We did an Overview of the BSC/RNC Cabinet and Subracks

We did an Overview of the BSC/RNC Subsystems and Boards

Thank you www.huawei.com

Documents

1. Single RAN MBSC GU Hardware Training