1. Single RAN MBSC GU Hardware Training

UK VDF Technical Briefing BSC and RNC HW

www.huawei.com

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

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

Copyright © 2011 Huawei Technologies Co., Ltd.

Page1

Contents 1.

BSC/RNC 6900 Features Overview

2.

BSC / RNC 6900 Cabinet and Subrack Overview 9

3.

BSC 6900 Subsystems and Boards

Copyright © 2011 Huawei Technologies Co., Ltd.

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19

Page3

BSC6900 - VDF UK Controller Solution

Copyright © 2011 Huawei Technologies Co., Ltd.

Page4

BSC6900 Features 

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

Copyright © 2011 Huawei Technologies Co., Ltd.

Page5

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.

Copyright © 2011 Huawei Technologies Co., Ltd.

Page6

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 Copyright © 2011 Huawei Technologies Co., Ltd.

Page7

UMTS Capacity 

Maximum configuration 

16,750

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





50,250

3,060 NodeBs and 5,100 cells 67,000

Single-subrack solution 

33,500

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

83,750

throughput 

900 NodeBs and 1500 Cells 100,500

Copyright © 2011 Huawei Technologies Co., Ltd.

Page8

Contents 1.

BSC/RNC 6900 Features Overview

2.

BSC / RNC 6900 Cabinet and Subrack Overview 9

3.

BSC 6900 Subsystems and Boards

Copyright © 2011 Huawei Technologies Co., Ltd.

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19

Page9

BSC6900 Cabinet 

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

Copyright © 2011 Huawei Technologies Co., Ltd.

Page10

Main Processing Rack (MPR) 

Only one MPR is configured in the BSC6900.



Components of the cabinet:





Main processing subrack (MPS)



Extended processing subrack (EPS)

Power distribution box

2

EPS

1

EPS

0

MPS

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

Copyright © 2011 Huawei Technologies Co., Ltd.

Page11

MPR

Extended Processing Rack(EPR) 

A BSC6900 can be configured with one EPR or

Power distribution box

no EPR. 



EPS

4

EPS

3

EPS

Components of the cabinet: 



5

Extended processing subrack (EPS)

Power consumption of a GSM EPS ≤ 1200 W Power consumption of a UMTS EPS ≤ 1310 W

EPR

Copyright © 2011 Huawei Technologies Co., Ltd.

Page12

TransCoder Rack (TCR) 

A BSC6900 can be configured with 0

Power distribution box

to 2 TCRs. 

Components of the cabinet: 



Transcoder subrack (TCS)

7

TCS

6

TCS

Power consumption of a GSM TCS≤

1000 W

TCR

Copyright © 2011 Huawei Technologies Co., Ltd.

Page13

Power Distribution Box 

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



6 groups of independent 48 V outputs

Power distribution box

Subrack 2 Subrack 1 Subrack subrack 0 (1) Power distribution monitoring

(2) Run indicator

(3) Alarm indicator

(5) Power output switch

(6) Power output switch labels

board (4) Mute switch

Copyright © 2011 Huawei Technologies Co., Ltd.

Page14

Subrack 436 mm

12 U

500 mm

(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

(9) DIP switch

the power distribution box

Copyright © 2011 Huawei Technologies Co., Ltd.

Page15

Slots in the Subrack 

The boards are installed on both the front and rear sides of the backplane, which is located in the middle of the subrack.

(1) Front

slot

(2) Backplane

(3) Rear

Copyright © 2011 Huawei Technologies Co., Ltd.

slot

Page16

BSC

Copyright © 2011 Huawei Technologies Co., Ltd.

Page17

RNC

Copyright © 2011 Huawei Technologies Co., Ltd.

Page18

Contents 1.

BSC/RNC 6900 Features Overview

2.

BSC / RNC 6900 Cabinet and Subrack Overview 9

3.

BSC 6900 Subsystems and Boards

Copyright © 2011 Huawei Technologies Co., Ltd.

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Page19

Contents 3.

BSC 6900 Subsystems and Boards



Logical Structure



Switching Subsystem



Service Processing Subsystem



Clock Subsystem



Interface Processing Subsystem



OM Subsystem

Copyright © 2011 Huawei Technologies Co., Ltd.

Page20

BSC6900 Logical Structure Clock (optional) Clock synchronization subsystem To BTS/NodeB

To other RNC To MSC To SGSN

Interface processing subsystem

Switching subsystem

Service processing subsystem

OM subsystem LMT/M2000 Copyright © 2011 Huawei Technologies Co., Ltd.

Page21

Switching Subsystem

Copyright © 2011 Huawei Technologies Co., Ltd.

Page22

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

Copyright © 2011 Huawei Technologies Co., Ltd.

Page23

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.

Copyright © 2011 Huawei Technologies Co., Ltd.

Page24

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

Copyright © 2011 Huawei Technologies Co., Ltd.

Page25

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. Copyright © 2011 Huawei Technologies Co., Ltd.

Page26

TNUa Board 

Functions 

Provides 128 k * 128 k TDM switching



Allocates the TDM network resources



Supports only GSM

Copyright © 2011 Huawei Technologies Co., Ltd.

Page27

TNUa Board 

Diagram of the

Inter-TNUa cabling between subracks.

Copyright © 2011 Huawei Technologies Co., Ltd.

Page28

Service Processing Subsystem

Copyright © 2011 Huawei Technologies Co., Ltd.

Page29

Service Processing Subsystem 

The service processing subsystem performs the following functions:





User data and signaling processing



Radio channel ciphering and deciphering



Radio resource management and control



System information and user message tracing

Capability of this subsystem can be increased as required.

Copyright © 2011 Huawei Technologies Co., Ltd.

Page30

Service Processing Subsystem

Data processing unit

Signaling processing unit

Data processing unit

SPU 0

DSP 0

SPU 0

DSP 0

SPU 7

DSP 21

SPU 7

DSP 21

Signaling signaling signaling processing unit processing processingunit unit

MPS MM PSPS

processing unit

Switching Subsystem

EPS MEPS PS

High-speed backplane channel Copyright © 2011 Huawei Technologies Co., Ltd.

Page31

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).

Main control signaling XPUb

Non-main control signaling XPUb

SSN0 MPU

SSN0 SPU

SSN7 SPU

SSN7 SPU

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 Copyright © 2011 Huawei Technologies Co., Ltd.

Page32

SPUb Board in RNC 

The SPUb board has eight subsystems. 

Main control SPUb board (MPU) 

Main control signaling SPUb

Manages the user plane resources; manages the load sharing of the user

Non-main control signaling SPUb

SSN0 MPU

SSN0 SPU

SSN7 SPU

SSN7 SPU

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 

Work mode: active and standby Copyright © 2011 Huawei Technologies Co., Ltd.

Page33

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

Copyright © 2011 Huawei Technologies Co., Ltd.

Page34

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

Work mode: resource pool Copyright © 2011 Huawei Technologies Co., Ltd.

Page35

DPUe Board 

Components 



Functions 

The DPUe board processes UMTS voice services and data services.



Selects and distributes data



Multiplexes and demultiplexes







28 hardware threads

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

Work mode: resource pool

Copyright © 2011 Huawei Technologies Co., Ltd.

Page36

Clock Synchronization Subsystem

Copyright © 2011 Huawei Technologies Co., Ltd.

Page37

Clock Subsystem CN

BITS

GPS*

MPS To MBTS

I N T

I N T

S C U a

GCUa Clock module

8 kHz

19.44 MHz, 32.768 MHz, 8 kHz

EPS To BTS

I N T

8 kHz S C U a

19.44 MHz, 32.768 MHz, 8 kHz

S C U a

EPS I N T

To NodeB

19.44 MHz, 32.768 MHz, 8 kHz

High-speed backplane channel Copyright © 2011 Huawei Technologies Co., Ltd.

Clock cable Page38

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

Work mode: active and standby Copyright © 2011 Huawei Technologies Co., Ltd.

Page39

GCUa Board 

Clock cable between the GCUa board and the SCUb board

Copyright © 2011 Huawei Technologies Co., Ltd.

Page40

Interface Processing Subsystem

Copyright © 2011 Huawei Technologies Co., Ltd.

Page41

Interface Processing Subsystem 

Interface board categorization Transmission Mode

Connector Type Electrical port

GO

OIUa

GO

POUc

GU

FE/GE

FG2a/FG2c

GU

E1

PEUa

GU

POUa

UO

POUc

GU

GE

GOUa/GOUc

GU

E1

AEUa

UO

Channelized STM-1

AOUa/AOUc

UO

Unchannelized STM-1

UOIa/UOIc

UO

Optical port

IP

STM-1

Optical port

Electrical port ATM

Supported Mode

EIUa

TDM

Electrical port

Board

Optical port

Copyright © 2011 Huawei Technologies Co., Ltd.

Page42

Transport Subsystem-Interface Board 

Board categorization Electrical port ATM Optical port

AEUa

E1 Channelized STM-1 Unchannelized STM-1

AOUa

AOUc

UOIa_ATM

UOIc_ATM

E1

PEUa

FE/GE

FG2a

FG2c

Channelized STM-1

POUa

POUc

Unchannelized STM-1

UOIa_IP

Iub Iur

Electrical port Interface board

IP STM-1 Optical port

Electrical port TDM Optical port

GE

GOUa

E1

EIUa

Channelized STM-1

Copyright © 2011 Huawei Technologies Co., Ltd.

OIUa

Page43

GOUc

POUc

Gb Iub Iur IuCS IUPS Abis A

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.

Copyright © 2011 Huawei Technologies Co., Ltd.

Page44

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

Copyright © 2011 Huawei Technologies Co., Ltd.

Page46

UOIc Board 

Functions 

Provides eight channels over unchannelized STM-1/OC3c 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 Copyright © 2011 Huawei Technologies Co., Ltd.

Page47

OM Subsystem

Copyright © 2011 Huawei Technologies Co., Ltd.

Page48

OM Subsystem

Intranet O M U

O M U

Extranet

To M2000

S C U a

S C U a

S C U a

S C U a

EPS

MPS

HUB Ethernet cable

Alarm box

Serial port cable LMT

Copyright © 2011 Huawei Technologies Co., Ltd.

Page49

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. Copyright © 2011 Huawei Technologies Co., Ltd.

Page50

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. Copyright © 2011 Huawei Technologies Co., Ltd.

Page51

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

Copyright © 2011 Huawei Technologies Co., Ltd.

Page52

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

Copyright © 2011 Huawei Technologies Co., Ltd.

Page 53

Thank you www.huawei.com