RNC Hardware Structure

UTRAN Chapter 1 2012

RNC Hardware Structure 1

General Introduction to

WCDMA SRAN6.0 BSC6900 System

Hardware Structure



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

Page3

REFERENCES

BSC6900 GU Product Description

BSC6900 GU Technical Description

BSC6900 GU Hardware Description

Page4



OBJECTIVES

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

Detail the functions of the components of BSC6900

Detail the hardware structure of BSC6900

Detail the signal flows in BSC6900

List the typical hardware configuration of BSC6900

Page5

CONTENTS

1. BSC6900 System Overview

2. BSC6900 Hardware Architecture

3. BSC6900 Signal Flows

4. BSC6900 Typical Configuration

Page6



Page7

BSC6900 POSITION IN UMTS/GSM

BSC6900 GU

BSC6900 GU

NodeB

BTS

MBTS

CS

PS

UE/MS UTRAN/GBSS CN

Uu/Um Iu/A/Gb

Iu-CS/A

Iu-PS/Gb

Iur

Iub

Iub/Abis

CAPACITY

Page8

ITEM

Specification

System Capacity (Boards

Supported by BSC6900

V900R012)

System Capacity (Boards

Supported by BSC6900

V900R013)

UMTS network

Traffic (Erl) 80,400 100,500

PS (UL+DL) data throughput

(Mbit/s) 12,000 24,000

Number of NodeBs 3,060 3,060

Number of cells 5,100 5,100

GSM network

Traffic (Erl) 24,000 Same*

Number of cells 2,048 Same

Number of TRXs 4096 Same

Maximum number of PDCHs to

be configured 30,720 Same

Maximum number of activated

PDCHs (MCS-9) 16,384 Same

Gb interface throughput (Mbit/s) 1,536 Same

*A multi-core board DPUf is added in the TC subrack. In BM/TC combined and all-TDM mode, the number of subracks is reduced from 1MPS+3EPS to 1MPS+2EPS.



Page9

FLEXIBLE TOPOLOGIES AND SMOOTH EVOLUTION

The BSC6900 can be flexibly configured as a BSC6900 GSM, BSC6900 UMTS, or BSC6900 GU; therefore, it is applicable to various networking scenarios.

The BSC6900 can be configured as one of the three variants, therefore facilitating the smooth evolution between GSM, GSM&UMTS, and UMTS.

The functions of the BSC6900 boards can be set online to dynamically adjust the capacity allocation between the GSM network and the UMTS network.

Page10

HIGH INTEGRATION AND CAPACITY OF GSM

Dual Switching Planes (IP+TDM) The IP plane supports a maximum of 20 Gbit/s

switching capacity.

The TDM plane supports a maximum of 128K128K 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



Page11

FEATURES

Supporting GSM/UMTS dual-mode network and the all-IP platform

Supporting dynamic data configuration and smooth expansion of the system capacity

Supporting different types of clock sources Line clock, BITS, GPS, external 8 kHz clock

Supporting star, chain, and tree networking with NodeBs and BTSs

Supporting E1/T1, STM-1, FE and GE transmission

Supporting HSPA+, DPI, and PTT (UMTS services)

Page12

FLEXIBLE HARDWARE CONFIGURATION

GSM have 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.



Page13

BSC6900 EVOLUTION PATHS

SW upgradewith Legacy HW + New HW (mandatory)

SW upgrade with Legacy HW + New HW (optional)

2009 2008 2006 GBSS8.1/RAN10 GBSS9.0/RAN11 GBSS12.0-13.0 /RAN12-13

BSC6000

(GSM)

BSC6810

(UMTS)

BSC6900 GSM only

BSC6900 UMTS only

BSC6900 Dual

mode

BSC6900 GSM only

BSC6900 UMTS only

BSC6900 Dual mode

SW upgradewith Legacy HW + New HW (optional)

SW upgradewith Legacy HW + New UMTS HW (mandatory)

Page14

Smooth evolution from BSC to RNC with software upgrade

Reducing CAPEX by reusing hardware

Dynamic capacity adjustment between 2G&3G

DUAL MODE DESIGNS

GSM&UMTS Co-cabinet

RNC

RNC

BSC

BSC

BSC

RNC

RNC

RNC

BSC

GSM&UMTS Cabinet

Software Upgrade



Page15

FEATURE OF BSC6900-CO OAM

Unified CME:

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

Unified WEB LMT for maintenance:

Easy and visual maintenance of 2G/3G systems

Page16

FEATURE OF BSC6900-CO TRM

IP/TDM networks

BSC6900 Co-TRM

3G

2G

3G

2G

Interface b

oard

GSM data

UMTS data

Dual-mode BTS

GSM data

UMTS data



FEATURE OF BSC6900-CO RRM

Page17

Huawei Lab Simulation

UMTS

GSM

Voice service Data 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

Load control between GSM/UMTS enables the traffic to

be shared between GSM and UMTS networks. This

improves network utilization.

The load control between GSM/UMTS improves the

service quality by directing services to different RATs

(GSM/UMTS) based on the service type.

CONTENTS


2. BSC6900 Hardware Structure



Page18



CONTENTS


2.1 Cabinets

2.2 Subracks

2.3 Subsystems and Boards

2.4 Cables

Page19

Page20

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

600 mm

2200 mm

800 mm

600 mm

2200 mm

800 mm

N68E-22 Cabinet (Single-door/Double-door)



Page21

COMPONENTS OF THE CABINET

Based on functions, cabinets are classified into the following types:

MPR: main processing rack

EPR: extended processing cabinet

TCR: transcoder rack (1) Air inlet (2) Subrack

(3) Air defense

frame

(4) Power

distribution box

(5) Cable rack in

the cabinet

(6) Rear cable

trough

Page22

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



Page23

EXTENDED PROCESSING RACK(EPR)

4 EPS

3 EPS

5 EPS


EPR

A BSC6900 can be configured with one EPR or no EPR.

Components of the cabinet: Extended processing subrack (EPS)

Power consumption of a GSM EPS 1200 W

Power consumption of a UMTS EPS 1310 W

Page24

TRANSCODER RACK (TCR)

A BSC6900 can be configured with 0 to 2 TCRs.

Components of the cabinet:

Transcoder subrack (TCS)

Power consumption of a GSM TCS 1000 W

7 TCS

6 TCS

8 TCS


TCR



POWER DISTRIBUTION BOX

Page25

(1) Power distribution monitoring

board

(2) Run indicator (3) Alarm indicator

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

Subrack 1

subrack 0

Subrack 2


Subrack 0

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

6 groups of independent 48 V outputs

CONTENTS


2.1 Cabinets

2.2 Subracks


2.4 Cables

Page26



SUBRACK

Page27

(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

500 mm

436 mm

12 U

DIP SWITCH ON THE SUBRACK

Page28

Subrack

No.

Bit

1 2 3 4 5 6 7 8

0 0 0 0 0 0

ON ON OFF ON ON ON ON ON

1

1 0 0 0 0

OFF ON OFF OFF ON ON ON ON

2

0 1 0 0 0

OFF ON OFF ON OFF ON ON ON

3

1 1 0 0 0

ON ON OFF OFF OFF ON ON ON

4

0 0 1 0 0

OFF ON OFF ON ON OFF ON ON

5

1 0 1 0 0

ON ON OFF

The DIP switch on the subrack consists of eight bits from bit 1 to bit 8.



Page29

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.

Page30

UMTS MPS

Only one MPS is configured in the BSC6900.

Front panel

Rear panel

D P U/I N T

INT

INT

INT

INT

OMUc

OMUc

D P U/I N

T

D P U/I N

T

D P U/I N

T

D P U/I N

T

D P U/I N

T

14 27262524232221201918171615

Backplane

SPU

SPU

SPU

SPU

SPU

SPU

SCU

SCU

SPU/DPU

SPU/DPU

SPU/DPU

SPU/DPU

GCU/GCG

GCU/GCG

0 1 1312111098765432



Page31

UMTS EPS

A BSC6900 UMTS can be configured with 0 to 5 EPSs.

Front panel

Rear panel

Page32

GSM MPS (IN BM/TC SEPARATED MODE)


INT

OMUc

INT

INT

INT

INT

INT

INT

INT

14 27262524232221201918171615

Backplane

XPU

XPU

XPU

XPU

TNUa

TNUa

SCUa

SCUa

DPUg

DPUg

GCUa

GCUa

0 1 1312111098765432

OMUc

Front panel

Rear panel



GSM EPS (IN BM/TC SEPARATED MODE)

Page33

A BSC6900 GSM can be configured with 0 to 3 EPSs.

Front panel

Rear panel INT

INT

INT

INT

INT

INT

INT

INT

14 27262524232221201918171615

Backplane

XPU

XPU

XPU

XPU

TNUa

TNUa

SCUa

SCUa

DPUg

DPUg

DPUg

0 1 1312111098765432

Page34

GSM MPS (IN BM/TC COMBINED MODE)


INT

INT

INT

INT

INT

INT

INT

INT

14 27262524232221201918171615

Backplane

XPU

XPU

XPU

XPU

TNUa

TNUa

SCUa

SCUa

DPUg

DPUgd

GCUa

GCUa

0 1 1312111098765432

DPUf

DPUf

OMUc

OMUc

Front panel

Rear panel



GSM EPS (IN BM/TC COMBINED MODE)


Page35

Front panel

Rear panel INT

INT

INT

INT

INT

INT

INT

INT

14 27262524232221201918171615

Backplane

XPU

XPU

XPU

XPU

TNUa

TNUa

SCUa

SCUa

DPUg

DPUg

DPUg

0 1 1312111098765432

INT

INT

INT

INT

DPUf

DPUf

DPUf

DPUf

DPUf

Page36

GSM MPS (IN A OVER IP MODE)


INT

OMUc

OMUc

INT

INT

INT

INT

INT

INT

INT

14 27262524232221201918171615

Backplane

XPU

XPU

XPU

XPU

TNUa

TNUa

SCUa

SCUa

DPUg

DPUg

GCUa

GCUa

0 1 1312111098765432

DPUf

DPUf

Front panel

Rear panel



GSM EPS (IN A OVER IP MODE)


Page37

Front panel

Rear panel INT

INT

INT

INT

INT

INT

INT

INT

14 27262524232221201918171615

Backplane

XPU

XPU

XPU

XPU

TNUa

TNUa

SCUa

SCUa

DPUg

DPUg

DPUg

0 1 1312111098765432

DPUf

DPUf

DPUf

TRANSCODER SUBRACK (TCS)

A BSC6900 GSM can be configured with a maximum of four TCSs.

Page38

Front panel

Rear panel

INT

INT

INT

INT

INT

INT

INT

INT

INT

INT

INT

INT

INT

INT

14 27262524232221201918171615

Backplane

TNUa

TNUa

SCUa

SCUa

0 1 1312111098765432

DPUf

(opt)

DPUf

(opt)

DPUf

(opt)

DPUf

(opt)

DPUf

(opt)



CONTENTS


2.1 Cabinets

2.2 Subracks


2.4 Cables

Page39

BSC6900 LOGICAL STRUCTURE

Page40

LMT/M2000

Clock synchronization

subsystem

Switching subsystem

Service processing subsystem

OM subsystem

To BTS/NodeB

To MSC

To other BSCs/RNCs

To SGSN

Clock (optional)

Interface processing subsystem



Page41

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

Page42

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.



Structure of the MAC switching

subsystem

Page43

SWITCHING SUBSYSTEM

High-speed backplane channel

Ethernet cable

Switching and

control unit

Another board

Another board

Switching and

control unit

Switching and

control unit

Another board

Another board

Another board

Another board

MPS

TCS

EPS

Page44

SWITCHING SUBSYSTEM

Inter-subrack cable for MAC switching

SCU SCU

SCU SCU

SCU SCU

EPS

EPS

MPS



Page45

SCUA 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 60 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

Page46

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 229 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



Page47

INTER-SUBRACK CONNECTIONS

Inter-Subrack SCUa

Interconnection Ethernet Cable

Subrack interconnection are made trough the SCU boards, the requirements and maximum capacities depends directly on the SCU board versions installed in each Rack.

Technologies for Subrack Cascading are based on Mesh or Chain topology.

EPS

MPS

SCUa (Active)

SCUa (Active)

SCUa (Standby)

SCUa (Standby)

Page48

Inter-subrack cable connections between SCUb boards by using SFP+ high-speed cables (MPR/EPR in full configuration) Blue lines indicate the SFP+ high-speed cables. Green lines indicate the unshielded straight-through cables.

INTERCONNECTIONS BETWEEN SCUB BOARDS



Page49

Inter-subrack cable connections between SCUb boards by using SFP+ high-speed cables in BM/TC combined mode Blue lines indicate the SFP+ high-speed cables. Green lines indicate the unshielded straight-through cables.

INTERCONNECTIONS

BETWEEN SCUB BOARDS

Page50

SWITCHING SUBSYSTEM

Structure of the TDM switching subsystem

MPS

TDM switching

unit

Another board

.

.

.

Another board

EPS

TDM switching

unit

Another board

.

.

.

Another board

EPS

TDM switching

unit

Another board

.

.

.

Another board High-speed backplane channel

TNU crossover cable



Page51

TNUA BOARD

Functions

Provides 128 k * 128 k TDM switching

Allocates the TDM network resources

Supports only GSM

TNUA BOARD

Page52

Inter-TNUa crossover

cables

between subracks



Page53

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

Page54

SERVICE PROCESSING SUBSYSTEM

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



Page55

XPUA BOARD

Functions

The XPUa board has four logic subsystems.

Subsystem 0 of the main control XPUa 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.

Subsystems 1 to 3 of a main control XPUa board

and subsystems 0 to 3 of a non-main control

XPUa board are signaling processing units

(SPUs), which process services of the control

plane.

A main control XPUa board supports 270 TRXs

and a non-main control XPUa board supports

360 TRXs.

signaling

SSN0 MPU

SSN3 SPU

signaling

SSN0 SPU

SSN3 SPU

SSN2 SPU

SSN1 SPU

SSN2 SPU

SSN1 SPU

Main control XPUa

Non-main control

XPUa

Page56

XPUB BOARD

Functions

The main control XPUb board has eight logical

subsystems. Therefore, the processing

capability of the XPUb board is higher than

that of the XPUa board by 75% to 100%. The

XPUb board is used only for GSM.

The main processing unit (MPU) is used to

manage the user plane resources, control

plane resources, and transport plane

resources.

The signaling processing unit (SPU) is used to

process services on the control plane.

Both the main control and non-main control

XPUb boards support a minimum of 640 TRXs.

signaling

SSN0 MPU

SSN7 SPU

signaling

SSN0 SPU

SSN7 SPU

Main control XPUb

Non-main control

XPUb



Page57

SPUA/SPUB BOARD

Functions

The SPUa and SPUb boards support both

GSM and UMTS.

The SPUa board has four logic subsystems,

whereas the SPUb board has eight logic

subsystems. Therefore, the processing

capability of the SPUb board is higher

than the SPUa board by 75% to 100%.

signaling

SSN0 MPU

SSN3 SPU

signaling

SSN0 SPU

SSN3 SPU

SSN2 SPU

SSN1 SPU

SSN2 SPU

SSN1 SPU

Main

control

SPUa

Non-main control SPUa

Page58

SPUA BOARD

signaling

SSN0 MPU

SSN3 SPU

signaling

SSN0 SPU

SSN3 SPU

SSN2 SPU

SSN1 SPU

SSN2 SPU

SSN1 SPU

Main control SPUa

Non-main control SPUa

It has four logic subsystems.

Main control SPUa 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 SPUa board (SPU)

Processes upper-layer signaling

over the Uu, Iu, Iur, Iub, A, Um, Abis,

and Ater interfaces

Work mode: active and standby



Page59

SPUB BOARD

signaling

SSN0 MPU

SSN7 SPU

signaling

SSN0 SPU

SSN7 SPU

Main control SPUb

Non-main control SPUb

Components and Functions

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


Page61

DPUB BOARD

Components

22 DSP chips

Functions

The DPUb board processes and distributes the UMTS user-plane

service data.

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

Work mode: resource pool



Page62

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


Page63

DPUC BOARD

Components

22 DSP chips

Functions

Converts the speech format and forwards data

Performs codec of voice services of 960 TCH/Fs and

supports 3,740 IWF flow numbers

Provides the Tandem Free Operation (TFO) function

Provides the voice enhancement function

Detects voice faults automatically




Page64

DPUD BOARD

Components

22 DSP chips

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

Supports GSM only


Page65

DPUG BOARD

The DPUg board has almost the same functions as the

DPUb board, whereas its capacity is higher than the

DPUb board.

The DPUg board supports the same number of active

PDCHs as the DPUb or DPUd board, whereas its packet

service processing capability (number of accessing

subscribers) is much higher than the DPUb or DPUd

board.

The DPUg board can process the PS services on up to

1,024 simultaneously active PDCHs where signals are

coded in MCS9.



Page66

DPUF BOARD

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

NIUA BOARD

Page67 Page67

Components

28 hardware threads

Functions

The NIUa board identifies the service type, which

facilitates scheduling of services with different

priorities and therefore helps achieve differentiated

services.




Page68

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

Page69

GCUA/GCGA 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




Page70

GCUA/GCGA BOARD

Clock cable between the GCUa/GCGa board and the SCUa board

Page71

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-1



INTERFACE PROCESSING SUBSYSTEM

Board

Type

Transmission

Mode Connector Type Board

INT

TDM

Electrical port EIUa

Optical port OIUa

IP

Electrical

port

FE/GE FG2a/FG2c

E1 PEUa

Optical

port

STM-1 POUc

GE GOUa/GOUc

Page72

Supported

RAT

GSM Only

GSM&UMTS

GSM&UMTS

GSM&UMTS

GSM&UMTS

GSM&UMTS

Interface board categorization

Page73

EIUA BOARD

Functions

Transmits and receives 32 E1/T1 signals, and encodes and decodes

the E1/T1 signals

Processes signals according to the Link Access Procedure on the D

channel (LAPD) protocol and SS7 Message Transfer Part Layer 2

(MTP2) protocol

Provides the board-level Tributary Protect Switch (TPS) function

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

Supports the A, Abis, Ater, and Pb interfaces

Supports 384 TRXs when serving as the Abis interface board and

supports 960 CICs when serving as the A interface board



Page74

OIUA BOARD

Functions

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

155.52 Mbit/s

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

Processes signals according to the Link Access Procedure on the D

channel (LAPD) protocol and SS7 Message Transfer Part Layer 2 (MTP2)

protocol

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

Supports the A, Abis, Ater, and Pb interfaces

Supports 384 TRXs when serving as the Abis interface board and

supports 1920 CICs when serving as the A interface board

Page75

FG2A BOARD

Functions Provides transmission of IP over Ethernet

Provides 8 channels over FE ports or 2 channels over GE electrical ports

Provides the routing-based backup and load sharing

Provides the link aggregation function at the MAC layer

Supports the A, Abis, Gb, Iu, Iur, and Iub interfaces Supports 384 TRXs when serving as the Abis interface board,

supports 6144 CICs when serving as the A interface board, and supports a maximum data flow of 128 Mbit/s when serving as the Gb interface board



Page76

FG2C BOARD

Functions Provides transmission of IP over Ethernet

Provides 12 channels over FE ports or 4 channels over GE electrical ports

Provides the routing-based backup and load sharing

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

10M/100M/1000M

10M/100M

Page77

PEUA BOARD

Functions Provides 32 channels of HDLC over E1/T1 or 32 channels of IP

over PPP/MLPPP over E1/T1

Provides 128 PPP links or 32 MLPPP groups, with each MLPPP group containing eight MLPPP links

Provides the board-level Tributary Protect Switch (TPS) function

Transmits, receives, encodes, and decodes the 32 E1s/T1s. The E1 transmission rate is 2.048 Mbit/s; the T1 transmission rate is 1.544 Mbit/s

Supports the Abis, Gb, and Iub interfaces

Supports 384 TRXs when serving as the Abis interface board and supports 64 Mbit/s throughput when serving as the Gb interface board



POUA BOARD

Functions Provides two channels over channelized optical STM-1/OC-

3 ports based on IP protocol, which support 126 E1 links

and 168 T1 links

Supports IP over E1/T1 over SDH/SONET

Supports Multi-Link PPP

Supports the extraction of line clock signals

Provides the board-level Tributary Protect Switch (TPS)

function

Provides clock signals for NodeBs

Supports the Iub interface

Page78

Page79

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


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.



Page80

GOUA BOARD

Functions Provides two channels over GE ports, which

are used for IP transmission Provides the board-level Tributary Protect

Switch (TPS) function Provides the routing-based backup and load

sharing Supports the A, Abis, Iu, Iur, and Iub interfaces Supports 384 TRXs when serving as the Abis

interface board and supports 6144 CICs when serving as the A interface board

Page81

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



Page82

AEUA BOARD

Functions Provides 32 E1/T1 links over ATM

Provides 32 IMA groups or 32 UNI links


Provides the fractional ATM and the fractional IMA functions

Supporting the timeslot cross-connection function

Extracts clock signals from the Iu interface and sends the signals to the GCUa and GCGa boards

AOUA BOARD

Page83

Functions

Provides two channels over channelized STM-1/OC-3

optical ports based on ATM

Provides the AAL2 switching function

Supports configurations of inverse multiplexing over

ATM (IMA) and user network interface (UNI)


Provides the line clock recovery function



AOUC BOARD

Functions

Provides four channels over the channelized optical STM-1/OC-3 ports based on ATM

Supports inverse multiplexing over ATM (IMA)

Supports the extraction of line clock signals


Supports the Iu, Iur, and Iub interfaces

Page84

UOIA BOARD

Functions

Provides four channels over the unchannelized STM-1/OC-

3c optical ports

Supports ATM/IP over SDH/SONET

Extracts line clock signals and sends the signals to the

GCUa board

Provides the board-level Automatic Protection Switching

(APS) function



Page85



Page87

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




Page88

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



Page89

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.

Page90

OMUA/OMUB BOARD

The OMUa/OMUb board works as a back administration module (BAM). 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



OMUC BOARD

Page91 Page91

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.

Page92

HARDWARE RELIABILITY

Board Redundancy Mode

SCUa/SCUb Board redundancy + port trunking on GE ports

XPUa/XPUbSPUa/SPUb Board redundancy

DPUb/DPUc/DPUd/DPUf/DPUg Board resource pool

GCUa/GCGa Board redundancy

AOUa/AOUc/OIUa/

UOIa/UOIc/POUa/POUc

Board redundancy + MSP 1:1 or MSP 1+1 optical port

redundancy

TNUa Board redundancy

PEUa/AEUa/EIUa Board redundancy

GOUa/GOUc Board redundancy + GE port redundancy or load sharing

FG2a/FG2c Board redundancy + GE/FE port redundancy or load sharing

OMUa/OMUc Board redundancy

NIUa Board resource pool



Page93

OVERALL STRUCTURE

Page94

CLASSIFICATION OF BSC6900 BOARDS

OM boards: OMUa/OMUb/OMUc

Network intelligent board: NIUa

Switching and control boards: SCUa/SCUb

Clock signal processing board: GCUa/GCGa

Signaling processing board: SPUa/SPUb/XPUa/XPUb

Universal data processing board:

DPUa/DPUb/DPUc/DPUd/DPUe/DPUf/DPUg

Interface processing board:

AEUa, AOUa, EIUa, OIUa, FG2a, GOUa, PEUa, POUa, UOIa

AOUc, FG2c, GOUc, POUc, UOIc



eXtensible Processing Unit (XPU)

SPUa/SPUb

GCP

UCP

RGCP

RUCP

MCP

XPUa/XPUb

GCP

RGCP

MCP

Data Processing Unit (DPU)

DPUa/DPUc/DPUf GTC

DPUb

GTC

GPCU

UUP

DPUd/DPUg GPCU

DPUe UUP

Page95

CLASSIFICATION OF BSC6900 BOARDS

CONTENTS


2.1 Cabinets

2.2 Subracks


2.4 Cables

Page96



Page97

BSC6900 CABLE CONNECTIONS

Page98

CABLES

Trunk cables: 75-ohm coaxial cables and active/standby 75-ohm coaxial cables

120-ohm twisted pair cables and active/standby 120-ohm twisted pair cables

Ethernet cables

Optical fibers

Y-shaped clock cables

TNUa connection cables

Alarm cables

Monitoring cables



Page99

TRUNK CABLES

75-ohm coaxial cables/120-ohm twisted pair cables

(1) DB44 connector (2) Main label (containing the cable code,

version, and manufacturer information)

(3) Label (identifying a coaxial

cable/twisted pair) (4) Metallic jacket of the DB44 connector

Page100

TRUNK CABLES

Active/standby 75-ohm coaxial cable

(1) DB44 connector (2) Metallic jacket of the DB44 connector

(3) Label 1 (identifying a coaxial

cable)

(4) Main label (containing the cable code, version, and

manufacturer information)

(5) Label 2 (identifying a coaxial

cable)



TRUNK CABLES

Page101

Active/standby 120-ohm twisted pair cable

(1) DB44 connector (2) Metallic jacket of the DB44 connector

(3) Label 1 (identifying a twisted pair

cable)

(4) Main label (containing the cable code, version, and

manufacturer information)

(5) Label 2 (identifying a twisted pair

cable)

Page102

ETHERNET CABLES

Straight-Through Cables



Page103

ETHERNET CABLES

Straight-Through Cables

Page105

OPTICAL FIBERS

An optical fiber is used to connect the optical interface board to the Optical Distribution Frame (ODF) or other NEs.



Y-SHAPED CLOCK CABLES

Page106

The Y-shaped clock cable transmits 8 kHz clock signals from the GCUa/GCGa board in the MPS to the SCUa boards in the EPSs.

(1) Label (identifying a

twisted pair cable)

(2) RJ45 connector

MONITORING CABLES FOR THE POWER DISTRIBUTION

BOX

Page107

The monitoring cable for the power distribution box transmits monitoring signals from the power distribution box to each service processing subrack.



QUESTIONS

Page108

How many subsystems does BSC6900 have? And what are they?

How to set the DIP switches for MPS?

CONTENTS





Page109



Page110

BSC6900 UMTS SIGNAL FLOWS

Control-Plane Signal Flow

Signaling Flow on the Uu Interface

Signaling Flow on the Iub Interface

Signaling Flow on the Iu/Iur Interface

User-Plane Signal Flow

UMTS Signal Flow Between Iub and Iu-CS/Iu-PS

Page111

INTRA-BSC6900 SIGNALING FLOW ON THE UU

INTERFACE



Page112

INTER-BSC6900 SIGNALING FLOW ON THE UU

INTERFACE

Page113

SIGNALING FLOW ON THE IUB INTERFACE



Page114

SIGNALING FLOW ON THE IU/IUR INTERFACE

2

INTRA-BSC6900 DATA FLOW BETWEEN IUB AND IU-

CS/IU-PS

Page115



INTER-BSC6900 DATA FLOW BETWEEN IUB AND

IU-CS/IU-PS

Page116

Page117

BSC6900 GSM 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



Page118

GSM CS SIGNAL FLOW

Abis over TDM & A over TDM

Page119

GSM CS SIGNAL FLOW

Abis over HDLC/IP & A over TDM



Page120

GSM CS SIGNAL FLOW

Abis over HDLC/IP & A over TDM

Page121

GSM PS SIGNAL FLOW

Abis over TDM



Page122

SIGNALING FLOW ON THE A INTERFACE

A over TDM

Page123

SIGNALING FLOW ON THE A INTERFACE

A over IP



Page124

SIGNALING FLOW ON THE ABIS INTERFACE

Abis over TDM/IP/HDLC

Page125

SIGNALING FLOW ON THE GB INTERFACE

Gb over IP/HDLC



QUESTIONS

Why does control-plane signaling of the Uu interface go though the DPU board first?

Which board does the RRC message terminate in?

Page126

CONTENTS





Page127



CONTENTS


4.1 UMTS Configuration

4.2 GSM Configuration

Page128

TYPICAL HARDWARE CONFIGURATION (UMTS)

Page129

Subrack

At least one MPS should be configured.

At least five EPSs should be configured.



TYPICAL CONFIGURATION SPECIFICATIONS

Page130

Subrack HW69 R12 HW69 R13

MPS EPS MPS EPS

BHCA (k) 420 560 620 620

Traffic (Erl) 13,400 13,400 16750 16750

PS(UL + DL)data

throughput(Mbit/s) 2,000 2,000 4000 4000

Number of NodeBs 540 720 900 900

Number of cells 1,200 1,200 1500 1500

Page131

TYPICAL CONFIGURATION SPECIFICATIONS OF HW68

R11 BOARDS

Specification/Subrack

Configuration

1 MPS (Minimum

Configuration)

1 MPS +

1 EPS

1 MPS +

2 EPSs

1 MPS +

3 EPSs

1 MPS +

4 EPSs

1 MPS + 5

EPSs

(Maximum

Configuration)

BHCA (k) 320 720 1,040 1,360 1,680 2,000

Traffic (Erl) 7,200 18,000 28,800 39,600 50,400 61,200

PS (UL + DL) data throughput (Mbit/s)

460 1,150 1,840 2,530 3,220 3,910

Number of NodeBs 200 500 800 1,100 1,400 1,700

Number of cells 600 1,500 2,400 3,300 4,200 5,100

Note:

The BHCA capability and traffic specification are based on Huawei traffic model.



TYPICAL CONFIGURATION SPECIFICATIONS OF HW69 R12 BOARDS

Page132 Page132


Configuration

1 MPS

(Minimum

Configuration)

1 MPS +

1 EPS

1 MPS +

2 EPSs

1 MPS +

3 EPSs

1 MPS +

4 EPSs

1 MPS + 5 EPSs

(Maximum

Configuration)

BHCA (k) 420 980 1,540 2,100 2,660 3,220

Traffic (Erl) 13,400 26,800 40,200 53,600 67,00 80,400

PS (UL + DL) data

throughput (Mbit/s) 2,000 4,000 6,000 8,000 10,000 12,000

Number of NodeBs 540 1,260 1,980 2,700 3,060 3,060

Number of cells 1,200 2,400 3,600 4,800 5,100 5,100

Note:


TYPICAL CONFIGURATION SPECIFICATIONS OF HW69

R13 BOARDS

Page133


Configuration

1 MPS

(Minimum

Configuration)

1 MPS +

1 EPS

1 MPS +

2 EPSs

1 MPS +

3 EPSs

1 MPS +

4 EPSs

1 MPS + 5 EPSs

(Maximum

Configuration)

BHCA (k) 620 1240 1860 2480 3100 3720

Traffic (Erl) 16,750 33,500 50,250 67,000 83,750 10,500

PS (UL + DL) data

throughput (Mbit/s) 4000 8000 12,000 16,000 20,000 24,000

Number of NodeBs 900 1800 2700 3060 3060 3060

Number of cells 1500 3000 4500 5100 5100 5100

Note:




CONTENTS


4.1 UMTS Configuration

4.2 GSM Configuration

Page134

TYPICAL HARDWARE CONFIGURATION (GSM)

Page135

Service processing boards The number of A-interface circuits should be considered in the configuration of DPUc/f

boards.

The number of PDCHs should be considered in the configuration of DPUd/g boards.

The number of TRXs should be considered in the configuration of XPUa/XPUb boards.

Interface boards In Abis over IP mode, the FG2a, FG2c, PEUa, POUc, GOUa, and GOUc boards can be

configured. In Abis over TDM mode, the EIUa and OIUa boards can be configured.

In A over IP mode, the FG2a, FG2a, GOUa, and GOUc boards can be configured. In A

over TDM mode, the EIUa, OIUa, and POUc boards can be configured.



TYPICAL CONFIGURATION SPECIFICATIONS (GSM)

Page136

Configuration of service processing boards of BSC6000 V900R008 and BSC6900 V900R012/R013

Board

BSC6000 V900R008 BSC6900 V900R012 BSC6900

V900R013

Main

control

XPUa

Non-

main

control

XPUa

DPU

c DPUd

Main

control

XPUb

Non-main

control

XPUb

DPUc DPUd DPUf DPUg

Number of

TRXs 270 360 - - 640 640 - - - -

Number of cells 270 360 - - 640 640 - - - -

Number of

BTSs 270 360 - - 640 640 - - - -

Number of

active PDCHs

(MCS-9)

- - - 1024 - - - 1024 - 1024

TYPICAL CONFIGURATION SPECIFICATION (GSM)

Page137

Interface board specifications

Item EIUa FG2a OIUa PEUa GOUa FG2c GOUc POUc_TDM POUc_IP

Number of

TRXs 384 384 384 384 384 2048 2048 512 2048

Number of

CICs (64 K)

over the A

interface

960 6144 1920 - 6144 23,040 23,040 3906 23,040

Gb (Mbit/s) - 128 - 64 - 1024 1024 504 -



MAXIMUM SPECIFICATIONS (V900R012/R013

GO)

Page138

MPS

EPS

EPS

512 TRXs

1024 TRXs

1024 TRXs

BM/TC Combined

MPS

EPS

EPS

1024 TRXs

1536 TRXs

1536 TRXs

BM/TC Separated

MPS

EPS

EPS

1024 TRXs

2048 TRXs

1024 TRXs

A over IP

MPS

EPS

EPS

EPS 1536 TRXs

1024 TRXs

1536 TRXs

1536 TRXs

R12 R13

R12/R13 R12/R13

Page139

TYPICAL CONFIGURATION (V900R013 GO)

BM/TC Separated (4096 TRXs)

The DPUf/g board is used.

Abis/Ater/A interface: TDM (optical

transmission)

Gb interface: FR (optical

transmission)

Because of the lack of backplane

TDM resource, the POUc and OIUa

boards that serve as the Ater

interface boards have the same

specifications.

4096TRX

14 15 16 17 18 19 20 21 22 23 24 25 26 27

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

OIU

a(A

ter)

OIU

a(A

ter)

XP

Ub

XP

Ub

XP

Ub

XP

Ub

TN

Ua

TN

Ua

SC

Ub

SC

Ub

XP

Ub

XP

Ub

DP

Ug

DP

Ug

0 1 2 3 4 5 6 7 8 9 10 11 12 13

14 15 16 17 18 19 20 21 22 23 24 25 26 27

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

OIU

a(A

ter)

OIU

a(A

ter)

OIU

a(A

ter)

OIU

a(A

ter)

XP

Ub

XP

Ub

XP

Ub

XP

Ub

TN

Ua

TN

Ua

SC

Ub

SC

Ub

DP

Ug

DP

Ug

0 1 2 3 4 5 6 7 8 9 10 11 12 13

14 15 16 17 18 19 20 21 22 23 24 25 26 27

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

OIU

a(A

ter)

OIU

a(A

ter)

DP

Ug

DP

Ug

OM

Uc

OM

UC

XP

Ub

XP

Ub

XP

Ub

XP

Ub

TN

Ua

TN

Ua

SC

Ub

SC

Ub

PO

Uc(G

B)

GC

Ua

GC

Ua

0 1 2 3 4 5 6 7 8 9 10 11 12 13

TC

14 15 16 17 18 19 20 21 22 23 24 25 26 27

OIU

a(A

ter)

OIU

a(A

ter)

PO

Uc(A

)

PO

Uc(A

)

TN

Ua

TN

Ua

SC

Ub

SC

Ub

DP

Uf(T

C)

DP

Uf(T

C)

DP

Uf(T

C)

DP

Uf(T

C)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

14 15 16 17 18 19 20 21 22 23 24 25 26 27

OIU

a(A

ter)

OIU

a(A

ter)

OIU

a(A

ter)

OIU

a(A

ter)

PO

Uc(A

)

PO

Uc(A

)

PO

Uc(A

)

PO

Uc(A

)

DP

Uf(T

C)

TN

Ua

TN

Ua

SC

Ub

SC

Ub

DP

Uf(T

C)

DP

Uf(T

C)

DP

Uf(T

C)

DP

Uf(T

C)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

14 15 16 17 18 19 20 21 22 23 24 25 26 27

OIU

a(A

ter)

OIU

a(A

ter)

PO

Uc(A

)

PO

Uc(A

)

TN

Ua

TN

Ua

SC

Ub

SC

Ub

DP

Uf(T

C)

DP

Uf(T

C)

DP

Uf(T

C)

DP

Uf(T

C)

0 1 2 3 4 5 6 7 8 9 10 11 12 13



TYPICAL CONFIGURATION (V900R013 GO)

Page140

BM/TC Combined (4096 TRXs)

The DPUf board is used. Abis/Ater/A interface: TDM (optical

transmission)

Gb interface: FR (optical transmission)

4096TRX

14 15 16 17 18 19 20 21 22 23 24 25 26 27

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

)

PO

Uc(A

)

PO

Uc(A

)

PO

Uc(A

)

XP

Ub

XP

Ub

XP

Ub

XP

Ub

TN

Ua

TN

Ua

SC

Ub

SC

Ub

DP

Uf(T

C)

DP

Uf(T

C)

DP

Uf(T

C)

DP

Uf(T

C)

DP

Ug

DP

Ug

0 1 2 3 4 5 6 7 8 9 10 11 12 13

14 15 16 17 18 19 20 21 22 23 24 25 26 27

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

)

PO

Uc(A

)

PO

Uc(G

B)

DP

Ug

DP

Ug

XP

Ub

XP

Ub

XP

Ub

XP

Ub

TN

Ua

TN

Ua

SC

Ub

SC

Ub

XP

Ub

XP

Ub

DP

Uf(T

C)

DP

Uf(T

C)

DP

Uf(T

C)

DP

Uf(T

C)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

14 15 16 17 18 19 20 21 22 23 24 25 26 27

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

bis

)

PO

Uc(A

)

PO

Uc(A

)

DP

Ug

DP

Ug

OM

Uc

OM

Uc

XP

Ub

XP

Ub

XP

Ub

XP

Ub

TN

Ua

TN

Ua

SC

Ub

SC

Ub

DP

Uf(T

C)

DP

Uf(T

C)

DP

Uf(T

C)

DP

Uf(T

C)

GC

Ua

GC

Ua

0 1 2 3 4 5 6 7 8 9 10 11 12 13

TYPICAL CONFIGURATION (GO)

The DPUf/g board is used.

All-IP transmission is used.

Abis/A/Gb interface: IP

Page141

All-IP transmission 4096TRX

14 15 16 17 18 19 20 21 22 23 24 25 26 27

DP

Ug

DP

Ug

XP

Ub

XP

Ub

XP

Ub

XP

Ub

SC

Ub

SC

Ub

DP

Uf(IW

F)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

14 15 16 17 18 19 20 21 22 23 24 25 26 27

FG

2c(A

bis

)

FG

2c(A

bis

)

GO

Uc(A

)

GO

Uc(A

)

DP

Ug

DP

Ug

XP

Ub

XP

Ub

XP

Ub

XP

Ub

SC

Ub

SC

Ub

XP

Ub

XP

Ub

DP

Uf(IW

F)

DP

Uf(IW

F)

0 1 2 3 4 5 6 7 8 9 10 11 12 13

14 15 16 17 18 19 20 21 22 23 24 25 26 27

FG

2c(A

bis

)

FG

2c(A

bis

)

FG

2c(G

B)

GO

Uc(A

)

GO

Uc(A

)

OM

Uc

OM

Uc

XP

Ub

XP

Ub

XP

Ub

XP

Ub

SC

Ub

SC

Ub

DP

Uf(IW

F)

DP

Uf(IW

F)

GC

Ua

GC

Ua

0 1 2 3 4 5 6 7 8 9 10 11 12 13



TYPICAL CONFIGURATION (UO-ATM INTERFACE)

The AOUc board serves as the Iub interface board.

The UOIc board serves as the Iu interface board.

Page142

TYPICAL CONFIGURATION (UO-ATM INTERFACE)

In ATM mode, UOIc boards serve as the Iu and Iub interface boards.

Page143



TYPICAL CONFIGURATION (UO-IP INTERFACE)

Page144 Page144

In IP mode, GOUc

boards serve as the Iu

and Iub interface

boards.

Page144

TYPICAL CONFIGURATION (GU)

Page145

UO: Four subracks are

configured, with GOUc boards

serving as the Iu and Iub

interface boards.

GO: Two subracks are

configured, with POUc boards

serving as the A and Abis

interface boards.

Page145



SUMMARY

We have learned about the BSC6900 in terms of its features and functions, subracks, boards, subsystems, signal flows of both the control plane and user plane of all interfaces, configuration principles, and typical configurations.

Page146

TERMS

EPS: extended processing subrack

MPS: main processing subrack

TCS: transcoder subrack

LMT: local maintenance terminal

Page147

Documents

RNC Hardware Structure