huawei_bsc6900 & bts3900

www.huawei.com

Copyright 2010 Huawei Technologies Co., Ltd. All rights reserved.

GSM Principles

Page1Copyright 2010 Huawei Technologies Co., Ltd. All rights reserved.

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

Grasp basic idea of GSM system such as frequency spectrum,

frequency reuse etc.

Grasp the structure of the GSM system and the protocol used.

Grasp certain numbers that refer to BSS

Grasp the 4 kinds of channel combination and understand the idea

of multi-frame.

Know some radio techniques

Get the idea of EDGE


References BSS Feature Description

BSS Signaling Analysis Manual

BSC Technical Manual


Contents1. GSM System Overview

2. GSM Network Structure

3. Service Area and Number Planning

4. Channels on the Wireless Interface

5. Radio Techniques

6. GPRS & EDGE Introduction






5. Radio Techniques



GSM system overview The GSM system is a frequency- and time-division cellular system,

each physical channel is characterized by a carrier frequency and a

time slot number

Cellular systems are designed to operate with groups of low-power

radios spread out over the geographical service area. Each group of

radios serve MSs presently located near them. The area served by each

group of radios is called a CELL

Uplink and downlink signals for one user are assigned different

frequencies, this kind of technique is called Frequency Division Duplex

(FDD)

Data for different users is conveyed in time intervals called slots ,

several slots make up a frame. This kind of technique is called Time

Division Multiple Access (TDMA)


GSM Development

Standard Protocol for GSM take effect

System was named as Global System for Mobile Communication

GSM system began to provide service in Europe(2G)

Provide services for the whole world

Micro Cell Technique is used in GSM system

1989

1991

1992

1994

1996


Cell Technique Macro Cell and Micro Cell

A certain radio coverage area formed by a set of transceivers that

connected to a set of antennas is called a CELL.

Macro Cell

In the beginning , High-Power BTSs are adopted to provide services. The BTS covers a wider area , but its frequency utilization is not efficient. So , it can only provide a few channels for subscribers.

Micro Cell

Later the Low-Power BTS joins the system for getting a better service area with high capacity . At the same time it adopts the frequency reuse technique to improve the efficiency of the frequency utilization and also the whole capacity of the network.


Multiple Access Technique Multiple Access Technique allows many subscribers to

use the same communication medium.

There are three kinds of basic Multiple Access Technique :

FDMA , TDMA and CDMA.

GSM system adopt FDD-TDMA (FDMA and TDMA

together).


FDMA FDMA uses different frequency

channels to accomplish

communication.

The whole frequency spectrum

available is divided into many

individual channels (for

transmitting and receiving)

every channel can support the

traffic for one subscriber or some

control information.

Frequency

Time


TDMA TDMA accomplishes the

communication in different

timeslot.

A carrier is divided into

channels based on time.

Different signals occupy

different timeslots in certain

sequence , that is , many

signals are transmitted on the

same frequency in different

time.

Time

Frequency


CDMA CDMA accomplishes the

communication in different code

sequences.

Special coding is adopted before

transmission, then different

information will lose nothing

after being mixed and

transmitted together on the

same frequency and at the same

time. Time

Frequency


GSM 900GSM 900

Duplex Separation: 45MHzChannel Bandwidth: 200KHz

The Frequency Spectrum

Uplink

890 915 935 960MHz

Downlink


Duplex Separation: 95MHzChannel Bandwidth: 200KHz

Base Station Receive

1710 1785 1805 1880MHz

Base Station Transmit

DCS 1800DCS 1800




Fd(n)=Fu(n)+1

0259


Frequency Reuse

7(Site)X 1(Cell) reuse

2

1

2

3

4

5

6

7


4 site X 3 cells reuse

1

8

9

210

46

5 3 711

12

R

Frequency Reuse


Cell Types

Omni

1

120degree

12

3

Omni-directional CellOmni-directional Cell

120 Degree Cell120 Degree Cell






5. Radio Techniques



GSM-GPRS Network Component

GSM /GPRS BSS

BTS

BSC

BTS

BSC

PCU SS7

SMS system

PSTNISDN

Internet,Intranet

MSC/VLR GMSC

HLR/AUC

SGSN

CG BG

GGSN

GPRS Backbone

Other PLMN

MS

MS

OMC


Interface Between Different Entities

GSM /GPRS BSS

BTS

BSC

BTS

BSC

PCU SS7SMS system

PSTNISDN

Internet,Intranet

MSC/VLR GMSC

HLR/AUC

SGSN

CG BG

GGSN

GPRS backbone

Other PLMN

A

Gb

Gi

Gp

C/D/Gs

Gr/Gs/Gd/Ge Gc

Ga

Abis

Um

MS

MS

OMC


Mobile StationMS

International Mobile Equipment Identity

(IMEI)

Mobile Equipment

MS=ME+SIMMS=ME+SIM

International Mobile Subscriber Identity (IMSI) Subscriber Identity Module


Subscriber Identity Module SIM International Mobile Subscriber

Identity (IMSI)

Temporary Mobile Subscriber

Identity (TMSI)

Location Area Identity (LAI)

Subscriber Authentication Key (Ki)

SIM


BTSBTS

BSCBSC

TC/SMTC/SMBSS

MSC

Base Station Subsystem BSS The Base Station Controller

BSC

The Base Transceiver Station

BTS

The Trans-coder TC and

Sub multiplexer (SM)


BTSBTS

BSCBSC

TC/SMTC/SMBSS

MSC

Packet Control Unit-----PCU Packet data

switching

Bridge between

SGSN and BSC

Provide Pb and Gb

interface GPRS Backbone

PCUPCU SGSNSGSN


Mobile-service Switching Center MSC Home Location Register HLR Visitor Location Register VLR Equipment Identity Register EIR Authentication Center AUC Echo Cancellor EC

AUCAUCHLRHLR

MSC/VLRMSC/VLR

PSTN

NSSEIREIROMC

BSS

ECEC

The Network Switching System


Mobile-service Switching Center MSC Call Processing

Operations and Maintenance Support

Interface management

Inter-network & Inter-working

Billing


Home Location Register HLR Subscriber ID (IMSI and MSISDN)

Current subscriber VLR (current location)

Supplementary service information

Subscriber status (registered/deregistered)

Authentication key and AuC functionality


Visitor Location Register VLR Mobile Status (IMSI attached / detached / busy / idle etc.)

Location Area Identity(LAI)

Temporary Mobile Subscriber Identity(TMSI)

Allocating the Roaming Number


IMEI is Checked In White List

IMEI is Checked in Black/Grey List

If NOT found

EIR focus on the equipment , not the subscriber!

Equipment Identity Register EIR

White List

Black List

Grey List


OMC Functional Architecture

OSMMI

DB

Event/AlarmManagement

SecurityManagement

ConfigurationManagement

Performance Management

Fault Management






5. Radio Techniques



Service Area

PLMN service area

......

Service Area

MSC service area...

Location area...

cell

PLMN service area PLMN service areaMSC service area...

Location area...

cell


LAI

Location Area Identification

The LAI is the international code for a location area.

MCC: Mobile Country CodeIt consists of 3 digits .For example: The MCC of China is "460"

MNC: Mobile Network CodeIt consists of 2 digits .For example: The MNC of China Mobile is "00"

LAC: Location Area CodeIt is a two bytes hex code.The value 0000 and FFFF is invalid.

For example: 460-00-0011

MCC MNC LAC


CGI

The CGI is a unique international identification for a cellThe format is LAI+CILAI: Location Area IdentificationCI: Cell Identity. This code uses two bytes hex code to

identify the cells within an LAI.For example : 460-00-0011-0001

CGI: Cell Global Identification


BSIC

NCC: PLMN network color code. It comprises 3 bit. It allows various neighboring PLMNs to be distinguished.

BCC: BTS color code. It comprises 3 bit, used to distinguish different cells assigned the same frequency!

NCC BCC

BSIC

BSICBase Station Identification Color Code)


CC: Country Code. For example: The CC of China is "86".NDC: National Destination Code. For example: The NDC of

China Telecom is 139, 138, 137, 136, 135.SN: Subscriber Number. Format:H0 H1 H2 H3 ABCDExample: 86-139-0666-1234

MSISDNCC NDC SN

National (significant)Mobile number

Mobile station internationalISDN number


MCC: Mobile Country CodeIt consists of 3 digits .For example: The MCC of China is "460"

MNC: Mobile Network CodeIt consists of 2 digits .For example: The MNC of China Telecom is "00"

MSIN: Mobile Subscriber Identification Number. H1H2H3 S ABCDEFFor example: 666-9777001

NMSI: National Mobile Subscriber IdentificationMNC and MSIN form it together.

For Example of IMSI : 460-00-666-9777001

Not more than 15 digits

3 digits 2 digits

IMSI

MCC MNC MSINNMSI

IMSI


TMSI

The TMSI is assigned only after successful subscriber authentication.

The VLR controls the allocation of new TMSI numbers and notifies them to the HLR.

TMSI is used to ensure that the identity of the mobile subscriber on the air interface is kept secret.

The TMSI consists of 4 bytes( 8 HEX numbers) and determined by the operator.

TMSI: Temporary Mobile Subscriber Identification)


IMEI

TAC FAC SNR SP

IMEI

IMEI: International Mobile Station Equipment Identification

TAC: Type approval code, 6 bit, determined by the type approval centerFAC: Final assembly code, 2 bit, It is determined by the manufacturer.SNR: Serial number, 6 bits, It is issued by the manufacturer of the MS. SP: 1 bit , Not used.Check the IMEI in your MS : *#06#

TAC: Type approval code, 6 bit, determined by the type approval centerFAC: Final assembly code, 2 bit, It is determined by the manufacturer.SNR: Serial number, 6 bits, It is issued by the manufacturer of the MS. SP: 1 bit , Not used.Check the IMEI in your MS : *#06#






5. Radio Techniques



2 30 16 74 52 3

The physical channel is the medium over which the information is carried: 200KHz and 0.577ms

0 1

TDMA FRAME

Timeslot The information carried in one time slot is called a burst

The information carried in one time slot is called a burst

Physical Channel and Logical Channel

The logical channel consists of the information carried over the physical channels

TDMA FRAME


Two types of Logical Channel

Traffic Channel (TCH) :Transmits traffic information, include data and speech.

Control Channel (CCH) :Or Signaling Channel, transmits all kinds of control information.


Traffic Channel (TCH)TCH

Traffic Channels

Speech

TCH/FS

Data

TCH/HSTCH/9.6 TCH/2.4

TCH/4.8

TCH Traffic ChannelTCH/FS Full rate Speech Channel TCH/HS Half rate Speech Channel TCH/9.6 Data Channel 9.6kb/sTCH/4.8 Data Channel 4.8kb/sTCH/2.4 Data Channel 2.4Kb/s


FCCHSCH

CCH (Control Channels)

DCCH

SDCCH

BCH

BCCH Synch. CH.ACCH

SACCHFACCH CCCH

RACH CBCH

PCH/AGCH

Broadcast Control Channel BCCHCommon Control Channel CCCHDedicated Control Channel DCCHAssociated Control Channel ACCH

Control Channel (CCH)


CCH

BCH

BCCH Synch.

Channels

SCH FCCH

The information carried on the BCCH

is monitored by the MS

periodically when it is in idle mode

BCCH: Broadcast Control Channel

FCCH: Frequency Correction Channel

SCH: Synchronization Channel

Broadcast Control Channel BCCH


CCH

CCCH

RACHuplink

CBCH downlink

PCH/AGCHdownlink

The CCCH is responsible for transferring control information between all mobiles and the network.

RACH: Random Access Channel PCH: Paging ChannelAGCH: Access Granted Channel CBCH: Cell Broadcast Channel

Common Control Channel CCCH


CCH

DCCH

SDCCH

FACCH SACCH

DCCH is assigned to a single wireless connection for measurement and handover purpose.SDCCH: Stand-alone Dedicated

Control Channel ACCH: Associated Control Channel SACCH: Slow Associated

Control Channel FACCH: Fast Associated Control

Channel

ACCH

Dedicated Control Channel DCCH


RACH CCCHCCH

SDCCHSACCHFACCH

TCH/FTCH/H

DCCH

TCH

DCH

Uplink Logical channel


FCCHSCHBCCH

PCHAGCH

BCCH

CCCH

CCH

SDCCHSACCHFACCH

TCH/FTCH/H

DCCH

TCH

DCH

Downlink Logical channel


Allocate signaling channel

FCCHSCHBCCH

PCHRACHAGCHSDCCHSDCCHTCHFACCH

Power-off

Idle mode

Dedicated mode

Idle mode

How to use these channels?

Search for frequency correction burst

Search for synchronous burst

Extract system information

Monitor paging message

Send access burst

Set up the call

Allocate voice channel

Conversation

Release the call


Packet logic channel Packet data channel (PDCH)

Comprising packet service channel and packet control

channel

Packet service channel (PDTCH)

Combined into the single-directional service channel

Packet control channel

Broadcast control channel: PBCCH

Public control channel: PPCH, PRACH, PAGCH

Private control channel: PACCH, PTCCH

TCH

BCCH

SACCHCCCH

TCH


GSM Logical Channel Combination Main BCCH combination FCCH + SCH + BCCH + CCCH

SDCCH combination SDCCH/8 + SACCH/8

Combined BCCH BCCH + CCCH +SDCCH/4 + SACCH/4

TCH/FR combination TCH/F + FACCH/F + SACCH/F

TCH/HR combination TCH/H + FACCH/H + SACCH/H


Combination of packet logic channel Packet logic channels (PDCH) can be combined via the

following three modes

Mode 1: PBCCH+PCCCH+PDTCH+PACCH+PTCCH;

Mode 2: PCCCH+PDTCH+PACCH+PTCCH;

Mode 3: PDTCH+PACCH+PTCCH

In case of small GPRS traffic, GPRS and circuit services use the

same BCCH and CCCH in the cell. In this case, only combination

mode 3 is needed in the cell

With the increase of traffic, the packet public channel should

be configured in the cell. Channel combination mode 1 and

mode 2 should be adopted


TDMA Frames

0 1

0 1 2 43 46 47 48 5049

51 Frame Multi-frames

0 1 10

CONTROL CHANNELS

2 3 4 5 6 7 2 3 5 764

GSM Multi-frames


GSM Multi-frames

TDMA Frames

0 1

0 1 2 43 21 22 23 2524

26 Frame Multi-frames

0 1 10

TRAFFIC CHANNELS

2 3 4 5 6 7 2 3 5 764






5. Radio Techniques



Power Control

Saves battery power

Reduces co-channel and

adjacent channel interference

8W

0.8W

5WBoth Uplink and Downlink

power settings can be

controlled independently and

individually.

BCCH -------

Does not attend Power

control


DTX and VAD

Voice Activity Detection VAD

Discontinuous Transmission DTX

Battery SavingInterference reduction


Timing Advance (TA)

Transmission delay t

Transmission delay t

TA

The mobile phone shouldsend the signal in advance!


Multi-path Fading Diversity

Frequency Hopping

Time Dispersion


Diversity Whats Diversity? Receive diversity provides an effective technique for both

overcoming the impact of fading across the radio channel

and increasing the received signal to interference ratio.

The former is achieved by ensuring uncorrelated (i.e.

low enough correlated) fading between antenna

branches i.e. not all antennas experience fades at the

same time.


Kinds of Diversity Time diversity

Coding, interleaving

Frequency diversity

Frequency hopping

Space diversity

Multiple antennas

Polarization diversity

Dual-polarized antennas

Multi-path diversity

Equalizer

t

f


Frequency HoppingFrequency

f 0

Frame

f 1

f 2

f 3

f 4

Time






5. Radio Techniques



57.6kbps

115 kbps

384kbps

2Mbps

GSM

HSCSD

GPRS

EDGE

IMT-2000

9.6 kbps

2G

2.5G3G

GSM Development Evolution


Data rate of EDGE and GPRS

8PSKGMSK

9.013.4

15.6

21.4

8.811.2

14.817.6

22.4

29.6

44.8

54.459.2

0.0

10.0

20.0

30.0

40.0

50.0

60.0

CS-1 CS-2 CS-3 CS-4 MCS-1 MCS-2 MCS-3 MCS-4 MCS-5 MCS-6 MCS-7 MCS-8 MCS-9

Kbps

GPRSGPRSGPRSGPRS

EGPRSEGPRSEGPRSEGPRS


Huawei EDGE Test Result

Downlink, 4 TS, MCS-9


www.huawei.com


BSC6900 GSM V900R013

Product Description

Copyright 2010 Huawei Technologies Co., Ltd. All rights reserved. Page1

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


References BSC6900 GSM Product Description

BSC6900 GSM Technical Description

BSC6900 GSM Hardware Description


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

Objectives


Contents1. BSC6900 System Overview

2. BSC6900 Hardware Architecture

3. BSC6900 Signal Flows

4. BSC6900 Typical Configuration


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

Abis


CapacityITEM

Specification

System Capacity (Boards

Supported by BSC6900

V900R012)

System Capacity

(Boards Supported by

BSC6900 V900R013)

GSM network

Traffic (Erl) 24,000 SameNumber of cells 2,048 SameNumber of TRXs 4096 SameMaximum number of

PDCHs to be configured30,720 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.


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.


High Integration and Capacity of GSM Dual Switching Planes (IP+TDM)

The IP plane supports a maximum of 240 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


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


Flexible Hardware Configuration GSM have three kinds of Hardware Configuration

BM/TC separated mode

BM/TC combined mode

A over IP mode


BSC6900 Evolution Paths

SW upgradewith Legacy HW

+ New HW (mandatory)

SW upgrade with

Legacy HW + New HW

(optional)

200920082006GBSS8.1/RAN10 GBSS9.0/RAN11 GBSS12.0-13.0

/RAN12-13

BSC6000

(GSM)

BSC6810

(UMTS)

BSC6900 GSM only

BSC6900UMTS only

BSC6900Dual 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)


Smooth evolution from BSC to RNC with software upgrade

Reducing CAPEX by reusing hardware

Dynamic capacity adjustment between 2G&3G

Dual Mode DesignsGSM&UMTS Co-cabinet

Software

UpgradeRNC

RNC

BSC

BSC

BSC

RNC

RNC

RNC

BSC

GSM&UMTS Cabinet


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


Feature of BSC6900-Co TRM

IP/TDM networks

BSC6900Co-TRM

3G

2G3G

2G

Interface

board

GSM data

UMTS data

Dual-mode BTS

GSM data

UMTS data


Huawei Lab Simulation

Feature of BSC6900-Co RRM

UMTS

GSM

Voice service Data service

Service direction on UMTS/GSM

Heavy loadHeavy 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.



2. BSC6900 Hardware Structure




Contents2. BSC6900 Hardware Structure

2.1 Cabinets

2.2 Subracks

2.3 Subsystems and Boards

2.4 Cables


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

mm600 mm

2200 mm

800 mm

N68E-22 Cabinet (Single-

door/Double-door)


Components of the Cabinet Based on functions,

cabinets are classified into

the following types:

MPR: main processing rack

EPR: extended processing rack

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


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


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


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

8 TCS


TCR


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



2.1 Cabinets

2.2 Subracks


2.4 Cables


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


DIP Switch on the Subrack

Subrack No.Bit

1 2 3 4 5 6 7 8

00 0 0 0 0

ON ON OFF ON ON ON ON ON

11 0 0 0 0

OFF ON OFFOFF ON ON ON ON

20 1 0 0 0

OFF ON OFFON OFF ON ON ON

31 1 0 0 0

ON ON OFFOFF OFF ON ON ON

40 0 1 0 0

OFF ON OFFON ON OFF ON ON

51 0 1 0 0

ON ON OFFOFF ON OFF ON ON

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


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.


GSM MPS (in BM/TC Separated Mode) Only one MPS is configured in the BSC6900.

Front panel

Rear panel


GSM EPS (in BM/TC Separated Mode)

Front panel

Rear panel

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


GSM MPS (in BM/TC Combined Mode) Only one MPS is configured in the BSC6900.

Front panel

Rear panel


GSM EPS (in BM/TC Combined Mode)

Front panel

Rear panel

INT

INT

INT

INT

INT

INT

INT

INT

14 27262524232221201918171615

Backpl ane

XPU

XPU

XPU

XPU

TNUa

TNUa

SCUa

SCUa

DPUg

DPUg

DPUg

0 1 1312111098765432

INT

INT

INT

INT

DPUf

DPUf

DPUf

DPUf

DPUf



GSM MPS (in A over IP Mode) Only one MPS is configured in the BSC6900.

Front panel

Rear panel


GSM EPS (in A over IP Mode)

Front panel

Rear panel



Transcoder Subrack (TCS)

Front panel

Rear panel

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



2.1 Cabinets

2.2 Subracks


2.4 Cables


BSC6900 Logical Structure

LMT/M2000

Clock synchronization

subsystem

Switching subsystemInterface

processing subsystem

Service processing subsystem

OM subsystem

To BTS/NodeB

To MSC

To other BSCs/RNCs

To SGSN

Clock (optional)


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


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

Page39

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

boardMPS

TCS

EPS


Switching Subsystem Inter-subrack cable for MAC switching

SCU SCU

SCU SCU

SCUSCU

EPS

EPS

MPS


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


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


Inter-Subrack Connections Inter-Subrack SCUa

Interconnection Ethernet

CableSCUa

(Active)

SCUa

(Active)

SCUa

(Standby)

SCUa

(Standby)


Interconnections Between SCUb Boards

Inter-subrack cable

connections between

SCUb boards by

using SFP+ high-

speed cables

(MPR/EPR in full

configuration,

remote TC

configuration)

Blue lines indicate

the SFP+ high-speed

cables.

Page44


Interconnections Between SCUb Boards Inter-subrack cable

connections between

SCUb boards by using

SFP+ high-speed cables

(Local TC configuration)

Blue lines indicate the

SFP+ high-speed cables.

Green lines indicate

the unshielded

straight-through cables.

Page45


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


TNUa Board Functions

Provides 128 k * 128 k TDM switching

Allocates the TDM network resources

Supports only GSM


TNUa Board Inter-TNUa

crossover cables

between subracks


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


Service Processing Subsystem


Signaling

processing unit

Signaling

processing unit

Data processing

unit

Data processing

unit

MPS EPS


XPUa Board The XPUa board has four logic subsystems

Main Control XPUa board (MPU)

Subsystem 0 of the main control XPUaboard 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 XPUa Board (SPU)

Subsystems 1 to 3 of the main control XPUa board belong to the CPU for Service (CPUS), which is used to process the services on the control plane.

Work mode: active and standby

Page51

Main control

XPUa

Non-main control XPUa


XPUb Board 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 XPUbboard belong to the CPU for Service (CPUS), which is used to process the services on the control plane.


Page52

Main control

XPUb

Non-main control XPUb


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%.

Page53


SPUa Board

Main control

SPUaNon-main control

SPUa

The SPUa board 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



SPUb Board

Main control

SPUbNon-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



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

Work mode: resource pool


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



DPUg Board The DPUg board has almost the same functions as the DPUd

board, whereas its capacity is higher than the DPUd board.

The DPUg board supports the same number of active PDCHs as the DPUd board, whereas its packet service processing capability(number of accessing subscribers) is much higher than the DPUd board. DPUd: Process 48 simultaneously active PDCHs (MCS9) per cell DPUg: Process 110 simultaneously active PDCHs (MCS9) per cell

The DPUg board can process the PS services on up to 1,024 simultaneously active PDCHs where signals are coded in MCS9.



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



Clock Subsystem

IN

T

IN

T

S

C

U

a

I

N

T

I

N

T

SC

U

a

SC

U

a

GCUaClock module

MPS

8 kHz

To NodeBEPS EPS

8 kHz

19.44 MHz, 32.768 MHz, 8 kHz

Clock cable


CN BITS GPS

To BTS

To

MBTS

19.44 MHz, 32.768 MHz, 8 kHz 19.44 MHz, 32.768 MHz, 8 kHz


GCUa/GCGa Board Functions

Extracts timing signals from the external synchronization

timing port and from the synchronization line signals,

processes the timing signals,

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



GCUa/GCGa Board Clock cable between

the GCUa/GCGa

board and the SCUa

board


Transport Subsystem-Interface Board Board categorization


Interface Processing Subsystem

BoardType

TransmissionMode

Connector Type Board Supported Mode

INT

TDM

Electrical port EIUa GSM Only

Optical portOIUa GSM Only

POUc GSM&UMTS

IP

Electrical port

FE/GE FG2a/FG2c GSM&UMTS

E1 PEUa GSM&UMTS

Optical port

STM-1 POUc GSM&UMTS

GE GOUa/GOUc GSM&UMTS

Interface board categorization


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


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


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


FG2c Board Functions

Provides transmission of IP over Ethernet

Provides 12 channels over FE ports or 4 channels over

GE electrical ports



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


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


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.


GOUa Board Functions

Provides two channels over GE ports, which are used for

IP transmission

Provides the board-level Tributary Protect Switch (TPS)

function


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


GOUc Board Functions

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

transmission


Supports the extraction of line clock signals


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


OM SubsystemS

C

U

a

S

C

U

a

HUB

OM

U

OM

U

S

CU

a

S

CU

a

Alarm box LMT

Extranet MPS

To M2000

Intranet

EPS

Ethernet cable

Serial port cable


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.


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 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.

Page76


Hardware ReliabilityBoard 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


Overall Structure


Classification of BSC6900 Boards (GSM) OM boards: OMUa/OMUb/OMUc

Switching and control boards: SCUa/SCUb/TNUa

Clock signal processing board: GCUa/GCGa

Signaling processing board: SPUa/SPUb/XPUa/XPUb

Universal data processing board:

DPUa/DPUc/DPUd/DPUf/DPUg

Interface processing board:

EIUa, OIUa, FG2a, FG2c, GOUa, GOUc ,PEUa, POUc


Classification of BSC6900 Boards

Page80

Board Logical Function

eXtensibleProcessing Unit (XPU)

SPUa/SPUb

GCPUCPRGCPRUCPMCP

XPUa/XPUbGCPRGCPMCP

Data Processing Unit (DPU)

DPUa/DPUc/DPUf GTC/ITCDPUd/DPUg GPCU



2.1 Cabinets

2.2 Subracks


2.4 Cables


BSC6900 Cable Connections


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


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


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 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)


Ethernet Cables Straight-Through Cables


Ethernet Cables Crossover Cables


Optical Fibers An optical fiber is 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 as required.

*LC/PC-LC/PC single-mode/multi-mode optical fibers can be used to connect an

optical interface board to another optical interface board as well as to the ODF or

other NEs.

In practice, two optical cables form a pair. Temporary labels are attached to both

ends of each cable in the pair. If one end of the cable is connected to the TX port,

the other end should be connected to the RX port.


Y-Shaped Clock CablesThe 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 The monitoring cable for the power distribution box

transmits monitoring signals from the power distribution

box to each service processing subrack.







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


GSM CS Signal Flow Abis over TDM & A over TDM

BM/TC

Combined

Mode

BM/TC Separated

Mode


GSM CS Signal Flow Abis over IP & A over TDM

BM/TC

Separated

Mode

BM/TC Combined

Mode


GSM PS Signal Flow Abis over TDM

Abis over IP


Signaling Flow on the A Interface A over TDM

BM/TC

Separated

Mode

BM/TC

Combined

Mode


Signaling Flow on the A Interface A over IP


Signaling Flow on the Abis Interface Abis over TDM

Abis over IP


Signaling Flow on the Gb Interface Gb over IP/FR







Typical Hardware Configuration (GSM) 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) Configuration of service processing boards of BSC6000 V900R008 and

BSC6900 V900R012/R013

Board

BSC6000 V900R008 BSC6900 V900R012BSC6900 V900R013

Main

control

XPUa

Non-main

control

XPUa

DPUc DPUd

Main

control

XPUb

Non-main

control

XPUbDPUc DPUd DPUf DPUg

Number of

TRXs270 360 - - 640 640 - - - -

Number of

cells270 360 - - 640 640 - - - -

Number of

BTSs270 360 - - 640 640 - - - -

Number of

active PDCHs (MCS-9)

- - - 1024 - - - 1024 - 1024

Number of TCHs/Fs

- - 960 - - - 960 - 1920 -


Typical Configuration Specification (GSM) 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)

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

EPS1536 TRXs

1024 TRXs

1536 TRXs

1536 TRXs

R12 R13

R12/R13 R12/R13


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.


Typical Configuration (V900R013 GO)

BM/TC Combined (4096 TRXs) The DPUf board is used.

Abis/Ater/A interface: TDM (optical transmission)

Gb interface: FR (optical transmission)


Typical Configuration (V900R013 GO) The DPUf/g board is used.

All-IP transmission is used. Abis/A/Gb interface: IP

All-IP transmission


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.

www.huawei.com


BSC6900 Initial Data Configuration Based on CME


Page1

Foreword The CM Express, also called CME, is the core of the

integrated solution of multi-standard radio access

network provided by Huawei. It can be used in various

scenarios of the UMTS and GSM networks, such as initial

deployment, network expansion, NodeB/BTS rebuilding,

and routine reconfiguration. In this way, the CME

functions as a configuration management system for the

entire network in various stages.


Page2


Describe CME Window

Outline BSC6900 data configuration procedure based on

CME

Complete GSM BSC data configuration

Backup and restore the configuration data


Page3

Contents1. Basic Concepts of CME

2. BSC6900 Data Configuration


Page4

CME General Configuration Window


Page5

Concepts of CME Current Area

The CME data areas consist of one current data area and multiple

planned data areas

The current data area stores the configuration data on the existing

network, and the data can only be browsed


Page6

Concepts of CME Planned Area

The planned data areas are used by different users for data planning

and data configuration. Users can create multiple planned data areas

based on the data in the current data area to perform different

configuration tasks.

By dividing planned data areas, different users can have different

workspaces, which allows multiple engineers to work in parallel. The

modifications in one area do not affect the services on the existing

network before the modified configuration data is activated. This

enhances the reliability and security of configuration data.


Page7

Planned Configuration and Current Configuration


Page8

Contents1. Basic Concepts of CME

2. BSC6900 Data Configuration


Page9

Steps of Data Configuration

END

START

Configuring Equipment Data

Configuring Global Data

Configuring Interface Data

Configuring the Clock Source


Page10

STEP1 Configuring Global Data The BSC global data is a prerequisite to the configuration

of other data.

The BSC global data includes the data that is closely

related to the service, such as the BSC attributes, the

originating signaling point (OSP), the PCU type, and the

clock mode. After the global data takes effect, do not

modify it unless the network is replanned.


Page11

Configuring Global Data (Cont.)

Choose:

GSM Global

Configuration Express

Choose:BSC Basic

Configuration


Page12

Configuring Global Data (Cont.) Basic Attributes of BSC

System Information

GSM CN Operator

Originating Signaling Point

Destination Signaling Point

PCU Type

Clock Source

Clock Mode


Page13

Example: Configure Basic AttributesChoose:

Basic Attributes

of BSC

Choose Parameter to

modifySelect value

1 2 3


Page14

Configuring Global Data (Cont.) (Optional) When the A interface uses the IP transmission

mode, it should be configured with the local and

destination entities of the M3UA.


Page15

Configuring Global Data (Cont.)

1

2

3

4


Page16

STEP2 Configuring Equipment Data The equipment data is the basis for transmitting service

data of the upper layer.

The equipment data includes the data of the cabinets,

subracks, and boards. The CME allows you to configure

the equipment data in device panel mode.


Page17

Configuring Equipment Data (Cont.) In the Main navigation tree in the left pane of the

planned data area, right-click a BSC, and then choose

Device Panel from the shortcut menu.

1

2

Select Device Panel


Page18

Configuring Equipment Data (Cont.) Add cabinets and boards based on the actual location of

the BSC hardware

1

Select Slot2

Select Board

Type


Page19

STEP3 Configuring the Clock Source of the Interface Board A line clock refers to an 8 kHz clock that runs from the interface

board of a subrack to the GCUa board. Therefore, when a line clock

is used as the system clock, you need to configure the clock source

of the interface board.

In BM/TC combined mode, the interface board that extracts the clock from the core network (CN)

is located in the MPS subrack. In this way, the clock signal can be transmitted to the GCUa board

from the LINE1 or LINE2 channels of the MPS backplane or from the 2 MHz clock output interface

(using clock signal lines) on the panel of the interface board.

In BM/TC separated mode, the interface board that extracts the clock from the CN is located in the

TCS subrack. In this way, the clock signal is transmitted to Ater interface board of this subrack

through the backplane, to the Ater interface board of the MPS subrack through the cable that

connects the subracks of the Ater interface, and then to the GCUa or GCGa board through the

backplane channel of the MPS subrack.

If the BSC is configured with a Gb interface board that is based on FR transmission, the Gb

interface board needs to lock the clock signals of the SGSN, because the clocks of the CS and PS

domains are not synchronized.


Page20

Configuring the Clock Source of the Interface Board (Cont.) Configuring the clock source of the interface board

1

2

3

Select BSC

Select Interface

Board

Select PropertiesSelect Parameter


Page21

STEP4 Configuring Interface Data Configuring the GSM network interface data, which

includes the data of the Ater, A, and Gb interfaces.

The A and Gb interfaces are standard interfaces, which

ensure the interconnection and communication between

the devices of different manufacturers.

The other interfaces are internal interfaces (that is,

private interfaces) that do not support the

interconnection between the devices of different

manufacturers.


Page22

Configuring Ater Interface(TDM) Configure the Ater interface between the MPS/EPS and

the TCS in the BSC.

Configuring the Ater interface only when the BSC is in

BM/TCS separated mode.

This configuration facilitates data transmission between

the MPS/EPS and the TCS.


Page23

Configuring A Interface (TDM) The A interface is a standard interface between the BSC

and the MSC.

To configure the data of the A interface in TDM mode,

you need to configure the E1/T1 data at the physical

layer, the data of the SS7 signaling link, and the

information about the peer destination signaling point

(DSP).


Page24

Configuring A Interface (TDM)Configure GSM CN Node

In the Transport navigation tree in the left pane of the planned data

area, choose NE to be configured > GSM. The interface information

about the NE is displayed under the GSM node.

Click A under the GSM node. The configuration window is displayed.

The system displays the configuration object tree and the property

parameters of the selected objects.

Choose MSC > GSM CN Node under the A Configuration Express node.

Configure the properties of the MSC node based on the planned data.

This configuration is applicable in adding GSM Core Network (CN)

nodes and signaling point groups, mapping DSPs and CN nodes, and

specifying groups for signaling points.

CAUTION:

Each CN connected to the BSC must be configured with node

information. Otherwise, calls cannot be accessed through the CN.

Click the configuration objects in sequence under TDM Transport and

configure the link information about the A interface, as shown in Table

1.


Page25

Configuring A Interface (TDM)Add A Interface E1/T1

1

2

3

4


Page26

Configuring A Interface (TDM) Configure MTP3 Signalling Link Set

Configure MTP3 Signalling Link

Configure MTP3 Signalling Route


Page27

Configuring A Interface (IP) In IP mode, the functions of the TC are performed by the

MGW, that is, the voice processing function is performed

by the core network. In this case, the TCS is not

configured for the BSC. The A interface data that you

need to configure includes the data of local entities, the

data at the physical layer and data link layer, and the link

data on the control plane.


Page28

Configuring A Interface (IP)Configure GSM CN Node

In the Transport navigation tree in the left pane of the planned data

area, choose NE to be configured > GSM. The interface information

about the NE is displayed under the GSM node.

Click A under the GSM node. The configuration window is displayed.

The system displays the configuration object tree and the property

parameters of the selected objects.

Choose MSC > GSM CN Node under the A Configuration Express node.

Configure the properties of the MSC node based on the planned data.

This configuration is applicable in adding GSM Core Network (CN)

nodes and signaling point groups, mapping DSPs and CN nodes, and

specifying groups for signaling points.

CAUTION:

Each CN connected to the BSC must be configured with node

information. Otherwise, calls cannot be accessed through the CN.

Click the configuration objects in sequence under TDM Transport and

configure the link information about the A interface, as shown in Table

1.


Page29

Configuring A Interface (IP) Set Ethernet Port IP Address


Page30

Configuring A Interface (IP) Configure SCTP Signalling Link

Configure M3UA Signalling Link Set

Configure M3UA Signalling Link

Configure M3UA Signalling Route


Page31

Configuring A Interface (IP) Configure Adjacent Node

Configure Adjacent Node Mapping

Configure Transport Resource Group

Configure IP Path

Binding Relation Between IPPATH

And MBFD


Page32

Configuring Gb Interface (FR) When an internal PCU is configured for the BSC, you need

to configure the Gb interface for the BSC so that the

communication in frame relay (FR) mode can be

established between the BSC and the SGSN.

Gb interface data that you need to configure includes the

information about the SGSN and the data of bearer links.


Page33

Configuring Gb Interface (FR) Add an SGSN node


Page34

Configuring Gb Interface (FR)


Page35

Configuring Gb Interface (IP) When an internal PCU is configured for the BSC, you need

to configure the Gb interface for the BSC so that the

communication in IP mode can be established between

the BSC and the SGSN. In IP mode, the Gb interface data

that you need to configure includes the information

about the SGSN and the data of bearer links.


Page36

Configuring Gb Interface (IP) Add an SGSN node


Page37

Configuring Gb Interface (IP) Set Ethernet Port Parameters

Set Ethernet Port IP Address


Page38

Configuring Gb Interface (IP) Configure network service entity

Configure local NSVL

Configure remote NSVL (optional)


Page39

Configuring Gb Interface (IP) Configure PTPBVC


Page40

Export MML Script


Page41

Summary BSC6900 data configuration procedure

The meaning of some important parameter

Backup and restore the configuration data

www.huawei.com


BSC6900 GOData Configuration



Detail the Procedure of BSC6900 Data Configuration

Perform Global Data Configuration

Perform Equipment Data Configuration

Perform Interface Configuration


Contents1. Data Configuration Overview

2. Preparation

3. Configuring the Global Information

4. Configuring the Equipment Data

5. Configuring the Interfaces


Data Configuration Overview Configuration Tools

Web LMT (Local Maintenance Terminal)

Based on MML (Man Machine Language)

CME (Configuration Management Express)

Based on GUI (Graphic User Interface)

LMT Execution Modes

Batch mode

multiple MML commands in a script

Single Command Mode

one command at a time and carry it out directly


Data Configuration Procedure

Configuring the Global Information

LOAD

Preparation

Configuring the Equipment Data

Configuring the Interfaces



2. Preparation





Preparation Data Configuration Right Management

Forcibly Obtain CM Control Right (FOC CMCTRL)

Request the CMC right (REQ CMCTRL)

BSC6900 controls whether LMT or M2000 has the permission

to configure the data at a moment to avoid the data conflict

Set CM Control enable switch (SET CMCTRLSW)

Check the status of CMC (LST CMCTRL)

Lock the CMC right (LCK CMCTRL)

Unlock the CMC right (ULK CMCTRL)


Preparation Data Configuration Mode

Set Offline State (SET CFGDATAINEFFECTIVE)

Set Online State (SET CFGDATAEFFECTIVE)


Preparation Data Initialization (RST DATA)

RST DATA will remove all configuration data in BAM

RST DATA

Data in BAMData in BAM

((OMUaOMUa))

Data in FAMData in FAM

(Other Boards)(Other Boards)



2. Preparation




Configuring the Global Information

LOAD

Preparation

Configuring the Equipment Data

Configuring the Interfaces


Global Data configuration Configuring the Basic Data

Configuring the OPC (Original Signaling Point Code)

Configuring the DPC (Destination Signaling Point Code)

Configuring the M3UA Local and Destination Entities

This section describes how to configure the local and destination M3UA entities. You need to configure the M3UA entities when the IP-based networking is used.

Basic Data OPC DPC M3UA Entities


Configuring the Basic Data Add GSM BSC Basic Information (SET BSCBASIC)

Area Code: Local area code, for example, 021 for Shanghai.

CC: Country code, for example, 86 for China

Interface Tag : Phase tag for GSM protocols supported by the A,

Um, Abis interface

Support TFO Codec Optimize: Whether to enable the tandem free

operation (TFO) Codec optimizing function

Support High Frequency Band : DCS180

huawei_bsc6900 & bts3900

Documents

huawei technologies

gsm system overview2

gsm principlespage1copyright

cell technique macro

basic idea of gsm system

frequency reuse technique

gsm network structure3

global system