RNC Hardware Structure

(1)

General Introduction to

WCDMA SRAN6.0 BSC6900 System

Hardware Structure

(2)

F

OREWORD

• 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

R

EFERENCES

• BSC6900 GU Product Description

• BSC6900 GU Technical Description

• BSC6900 GU Hardware Description

Page4

(3)

O

BJECTIVES

• 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

C

ONTENTS

1. BSC6900 System Overview

2. BSC6900 Hardware Architecture

3. BSC6900 Signal Flows

4. BSC6900 Typical Configuration

Page6

(4)

Page7

BSC6900 P

OSITION 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

C

APACITY 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.

(5)

Page9

F

LEXIBLE

T

OPOLOGIESAND

S

MOOTH

E

VOLUTION

• 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

H

IGH

I

NTEGRATION AND

C

APACITY 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

128K×128K switching capacity.

• A maximum of 16,384 active PDCHs are

supported.

• Maximum traffic: 24,000 Erl

• Comprehensive BHCA: 5,900,000

• Gb throughput: 1,536 Mbit/s

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Page11

F

EATURES

• 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

F

LEXIBLE

H

ARDWARE

C

ONFIGURATION

• 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.

(7)

Page13

BSC6900 E

VOLUTION

P

ATHS

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

D

UAL

M

ODE

D

ESIGNS

GSM&UMTSCo-cabinet RNC RNC BSC BSC BSC RNC RNC RNC BSC GSM&UMTSCabinet Software Upgrade

(8)

Page15

F

EATURE OF

BSC6900-C

O

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

F

EATURE OF

BSC6900-C

O

TRM

IP/TDM networks BSC6900 Co-TRM 3G 2G 3G 2G In te rf ac e b o ar d GSM data UMTS data Dual-mode BTS GSM data UMTS data

(9)

FEATURE OF BSC6900-CO RRM

Page17

Huawei Lab Simulation UMTS

GSM

Voice service Data service

Service direction on UMTS/GSM

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.

C

ONTENTS

1. BSC6900 System Overview

2. BSC6900 Hardware Structure

3. BSC6900 Signal Flows

4. BSC6900 Typical Configuration

Page18

(10)

C

ONTENTS

2. BSC6900 Hardware Structure

2.1 Cabinets

2.2 Subracks

2.3 Subsystems and Boards

2.4 Cables

Page19

Page20

BSC6900 C

ABINET

• 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)

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Page21

C

OMPONENTS OF THE

C

ABINET

• 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

M

AIN

P

ROCESSING

R

ACK

(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

(12)

Page23

E

XTENDED

P

ROCESSING

R

ACK

(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

T

RANS

C

ODER

R

ACK

(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

(13)

P

OWER

D

ISTRIBUTION

B

OX

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

C

ONTENTS

2. BSC6900 Hardware Structure

2.1 Cabinets

2.2 Subracks

2.3 Subsystems and Boards

2.4 Cables

(14)

S

UBRACK

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 S

WITCH ON THE

S

UBRACK

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

(15)

Page29

S

LOTS IN THE

S

UBRACK

(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 I N T I N T I N T I N T O M U c O M U c 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 15 16 17 18 19 20 21 22 23 24 25 26 27 Backplane S P U S P U S P U S P U S P U S P U S C U S C U S P U / D P U S P U / D P U S P U / D P U S P U / D P U G C U / G C G G C U / G C G 0 1 2 3 4 5 6 7 8 9 10 11 12 13

(16)

Page31

UMTS EPS

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

Front panel Rear panel

Page32

GSM MPS (

IN

BM/TC S

EPARATED

M

ODE

)

• Only one MPS is configured in the BSC6900.

I N T O M U c I N T I N T I N T I N T I N T I N T I N T 14 15 16 17 18 19 20 21 22 23 24 25 26 27 Backplane X P U X P U X P U X P U T N U a T N U a S C U a S C U a D P U g D P U g G C U a G C U a 0 1 2 3 4 5 6 7 8 9 10 11 12 13 O M U c Front panel Rear panel

(17)

GSM EPS (

IN

BM/TC S

EPARATED

M

ODE

)

Page33

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

Front panel Rear panel I N T I N T I N T I N T I N T I N T I N T I N T 14 15 16 17 18 19 20 21 22 23 24 25 26 27 Backplane X P U X P U X P U X P U T N U a T N U a S C U a S C U a D P U g D P U g D P U g 0 1 2 3 4 5 6 7 8 9 10 11 12 13 Page34

GSM MPS (

IN

BM/TC C

OMBINED

M

ODE

)

• Only one MPS is configured in the BSC6900.

I N T I N T I N T I N T I N T I N T I N T I N T 14 15 16 17 18 19 20 21 22 23 24 25 26 27 Backplane X P U X P U X P U X P U T N U a T N U a S C U a S C U a D P U g D P U gd G C U a G C U a 0 1 2 3 4 5 6 7 8 9 10 11 12 13 D P U f D P U f O M U c O M U c Front panel Rear panel

(18)

GSM EPS (

IN

BM/TC C

OMBINED

M

ODE

)

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

Page35 Front panel Rear panel I N T I N T I N T I N T I N T I N T I N T I N T 14 15 16 17 18 19 20 21 22 23 24 25 26 27 Backplane X P U X P U X P U X P U T N U a T N U a S C U a S C U a D P U g D P U g D P U g 0 1 2 3 4 5 6 7 8 9 10 11 12 13 I N T I N T I N T I N T D P U f D P U f D P U f D P U f D P U f Page36

GSM MPS (

IN

A

OVER

IP M

ODE

)

• Only one MPS is configured in the BSC6900.

I N T O M U c O M U c I N T I N T I N T I N T I N T I N T I N T 14 15 16 17 18 19 20 21 22 23 24 25 26 27 Backplane X P U X P U X P U X P U T N U a T N U a S C U a S C U a D P U g D P U g G C U a G C U a 0 1 2 3 4 5 6 7 8 9 10 11 12 13 D P U f D P U f Front panel Rear panel

(19)

GSM EPS (

IN

A

OVER

IP M

ODE

)

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

Page37 Front panel Rear panel I N T I N T I N T I N T I N T I N T I N T I N T 14 15 16 17 18 19 20 21 22 23 24 25 26 27 Backplane X P U X P U X P U X P U T N U a T N U a S C U a S C U a D P U g D P U g D P U g 0 1 2 3 4 5 6 7 8 9 10 11 12 13 D P U f D P U f D P U f

T

RANSCODER

S

UBRACK

(TCS)

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

Page38 Front panel Rear panel I N T I N T I N T I N T I N T I N T I N T I N T I N T I N T I N T I N T I N T I N T 14 15 16 17 18 19 20 21 22 23 24 25 26 27 Backplane T N U a T N U a S C U a S C U a 0 1 2 3 4 5 6 7 8 9 10 11 12 13 D P U f (opt ) D P U f (opt ) D P U f (opt ) D P U f (opt ) D P U f (opt )

(20)

C

ONTENTS

2. BSC6900 Hardware Structure

2.1 Cabinets

2.2 Subracks

2.3 Subsystems and Boards

2.4 Cables Page39

BSC6900 L

OGICAL

S

TRUCTURE 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

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Page41

S

WITCHING

S

UBSYSTEM

• 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

N

ETWORK

T

OPOLOGIES

B

ETWEEN

S

UBRACKS

• 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.

(22)

• Structure of the MAC switching

subsystem

Page43

S

WITCHING

S

UBSYSTEM

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

S

WITCHING

S

UBSYSTEM

• Inter-subrack cable for MAC switching

SCU SCU SCU SCU SCU SCU EPS EPS MPS

(23)

Page45

SCU

A

B

OARD

 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

SCU

B

OARD

 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

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Page47

I

NTER

-S

UBRACK

C

ONNECTIONS

• 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.

(25)

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

S

WITCHING

S

UBSYSTEM

• 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

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Page51

TNU

A

B

OARD

 Functions

 Provides 128 k * 128 k TDM switching

 Allocates the TDM network resources

 Supports only GSM

TNU

A

B

OARD Page52  Inter-TNUa crossover cables between subracks

(27)

Page53

S

ERVICE

P

ROCESSING

S

UBSYSTEM

• 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

S

ERVICE

P

ROCESSING

S

UBSYSTEM

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

(28)

Page55

XPU

A

B

OARD

 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

XPU

B

OARD  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

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Page57

SPU

A

/SPU

B

OARD

 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

SPU

A

B

OARD 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

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Page59

SPU

B

OARD 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

• Work mode: active and standby

Page61

DPU

B

OARD

• 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

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Page62

DPU

E

B

OARD

• 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

• Work mode: resource pool

Page63

DPU

C

B

OARD

• 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

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Page64

DPU

D

B

OARD

• 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

• Work mode: resource pool

Page65

DPU

G

B

OARD

• 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.

(33)

Page66

DPU

F

B

OARD

• 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

NIU

A

B

OARD 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.

(34)

Page68

C

LOCK

S

UBSYSTEM 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 8 EPS 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

GCU

A

/GCG

A

B

OARD

• 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

(35)

Page70

GCU

A

/GCG

A

B

OARD

• Clock cable

between the

GCUa/GCGa

board and the

SCUa board

Page71

T

RANSPORT

S

UBSYSTEM

-I

NTERFACE

B

OARD

 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 Channelized OIUa STM-1

(36)

I

NTERFACE

P

ROCESSING

S

UBSYSTEM

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

EIU

A

B

OARD

 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

(37)

Page74

OIU

A

B

OARD

 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

FG2

A

B

OARD

• 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

(38)

Page76

FG2

C

B

OARD

• Functions

– Provides transmission of IP over Ethernet – Provides 12 channels over FE ports or 4 channels

over GE electrical ports

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

10M/100M/1000M

10M/100M

Page77

PEU

A

B

OARD

• 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

(39)

POU

A

B

OARD

• 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 clock signals for NodeBs – Supports the Iub interface

Page78

Page79

POU

C

B

OARD

• 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.

(40)

Page80

GOU

A

B

OARD

• Functions

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

– 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

GOU

C

B

OARD

• Functions

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

– Supports the extraction of line clock signals – Supports the A, Abis, Gb, Iu, Iur, and Iub

interfaces

(41)

Page82

AEU

A

B

OARD

• Functions

– Provides 32 E1/T1 links over ATM – Provides 32 IMA groups or 32 UNI links – Supports the Iub interface

– 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

AOU

A

B

OARD

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)

 Supports the Iub interface

(42)

AOU

C

B

OARD

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

– Provides clock signals for NodeBs

– Supports the Iu, Iur, and Iub interfaces

Page84

UOI

A

B

OARD

• 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 clock signals for NodeBs – Supports the Iu, Iur, and Iub interfaces

(43)

Page87

UOI

C

B

OARD

• Functions

– Provides eight channels over unchannelized STM-1/OC-3c optical ports

– Supports ATM over SDH/SONET

– Extracts line clock signals and sends the signals to the GCUa board

– Provides clock signals for NodeBs – Supports the Iu, Iur, and Iub interfaces

Page88

OM S

UBSYSTEM 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

(44)

Page89

D

UAL

OM P

LANE

• 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

OMU

A

/OMU

B

OARD

• 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

(45)

OMU

C

B

OARD

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

H

ARDWARE

R

ELIABILITY

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

(46)

Page93

O

VERALL

S

TRUCTURE

Page94

C

LASSIFICATION OF

BSC6900 B

OARDS

• 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

(47)

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

C

LASSIFICATION OF

BSC6900 B

OARDS

C

ONTENTS

2. BSC6900 Hardware Structure

2.1 Cabinets

2.2 Subracks

2.3 Subsystems and Boards

2.4 Cables

(48)

Page97

BSC6900 C

ABLE

C

ONNECTIONS

Page98

C

ABLES

• 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

(49)

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)

(50)

T

RUNK

C

ABLES

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

E

THERNET

C

ABLES

(51)

Page103

E

THERNET

C

ABLES

• Straight-Through Cables

Page105

O

PTICAL

F

IBERS

• An optical fiber is used to connect the optical

interface board to the Optical Distribution

Frame (ODF) or other NEs.

(52)

Y-S

HAPED

C

LOCK

C

ABLES

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 FORTHE 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.

(53)

Q

UESTIONS

Page108

• How many subsystems does BSC6900 have?

And what are they?

• How to set the DIP switches for MPS?

C

ONTENTS

1. BSC6900 System Overview

2. BSC6900 Hardware Structure

3. BSC6900 Signal Flows

4. BSC6900 Typical Configuration

Page109

(54)

Page110

BSC6900 UMTS S

IGNAL

F

LOWS

• 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 ONTHE UU

(55)

Page112

INTER-BSC6900 SIGNALING FLOWON THE UU

INTERFACE

Page113

(56)

Page114

S

IGNALING

F

LOW ON THE

I

U

/I

UR

I

NTERFACE

2

I

NTRA

-BSC6900 D

ATA

F

LOW

B

ETWEEN

I

UBAND

I

U

-CS/I

U

-PS

(57)

I

NTER

-BSC6900 D

ATA

F

LOW

B

ETWEEN

I

UBAND

I

U

-CS/I

U

-PS

Page116

Page117

BSC6900 GSM S

IGNAL

F

LOWS

• 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

(58)

Page118

GSM CS S

IGNAL

F

LOW

• Abis over TDM & A over TDM

Page119

GSM CS S

IGNAL

F

LOW

(59)

Page120

GSM CS S

IGNAL

F

LOW

• Abis over HDLC/IP & A over TDM

Page121

GSM PS S

IGNAL

F

LOW

(60)

Page122

S

IGNALING

F

LOW ON THE

A I

NTERFACE

• A over TDM

Page123

S

IGNALING

F

LOW ON THE

A I

NTERFACE

(61)

Page124

S

IGNALING

F

LOW ON THE

A

BIS

I

NTERFACE

• Abis over TDM/IP/HDLC

Page125

S

IGNALING

F

LOW ON THE

G

B

I

NTERFACE

(62)

Q

UESTIONS

• Why does control-plane signaling of the Uu

interface go though the DPU board first?

• Which board does the RRC message

terminate in?

Page126

C

ONTENTS

1. BSC6900 System Overview

2. BSC6900 Hardware Structure

3. BSC6900 Signal Flows

4. BSC6900 Typical Configuration

Page127

(63)

C

ONTENTS

4. BSC6900 Typical Configuration

4.1 UMTS Configuration 4.2 GSM Configuration

Page128

T

YPICAL

H

ARDWARE

C

ONFIGURATION

(UMTS)

Page129

• Subrack

– At least one MPS should be configured.

– At least five EPSs should be configured.

(64)

T

YPICAL

C

ONFIGURATION

S

PECIFICATIONS 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:

(65)

TYPICAL CONFIGURATION SPECIFICATIONSOF HW69 R12 BOARDS Page132 Page132 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) 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:

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

TYPICAL CONFIGURATION SPECIFICATIONS OF HW69

R13 BOARDS Page133 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) 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:

(66)

C

ONTENTS

4. BSC6900 Typical Configuration

4.1 UMTS Configuration

4.2 GSM Configuration

Page134

T

YPICAL

H

ARDWARE

C

ONFIGURATION

(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

(67)

T

YPICAL

C

ONFIGURATION

S

PECIFICATIONS

(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

T

YPICAL

C

ONFIGURATION

S

PECIFICATION

(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 -

(68)

M

AXIMUM

S

PECIFICATIONS

(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

T

YPICAL

C

ONFIGURATION

(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 U c( A bis ) PO U c( A bis ) PO U c( A bis ) PO U c( A bis ) PO U c( A bis ) PO U c( A bis ) O IU a(A te r) O IU a(A te r) XPU b XPU b XPU b XPU b TN U a TN U a S C U b S C U b XPU b XPU b D PU g D PU g 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 U c( A bis ) PO U c( A bis ) PO U c( A bis ) PO U c( A bis ) PO U c( A bis ) PO U c( A bis ) O IU a(A te r) O IU a(A te r) O IU a(A te r) O IU a(A te r) XPU b XPU b XPU b XPU b TNUa TNUa S C U b S C U b D PU g D PU g 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 U c(A bis ) PO U c(A bis ) PO U c(A bis ) PO U c(A bis ) O IU a(A te r) O IU a(A te r) D PU g D PU g O MU c O MU C XPU b XPU b XPU b XPU b TNU_a TNU_a S C U b S C U b PO U c(G B ) G C U a G C U a 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 O IU a(A te r) O IU a(A te r) PO U c( A ) P O Uc (A ) TNU_a TNUa SCU b S C U b D PU f(TC ) D PU f(TC ) D PU f(TC ) D PU f(TC ) 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 O IU a(A te r) O IU a(A te r) O IU a(A te r) O IU a(A te r) PO U c( A ) P O Uc (A ) PO U c( A ) PO U c( A ) D PU f(T C ) TN U a TN Ua SCU b S C U b D PU f(T C ) D PU f(T C ) D PU f(T C ) D PU f(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 O IU a(A te r) O IU a(A te r) PO U c( A ) P O Uc (A ) TNU a TNUa S C U b S C U b D PU f(T C ) D PU f(T C ) D PU f(T C ) D PU f(T C ) 0 1 2 3 4 5 6 7 8 9 10 11 12 13

(69)

T

YPICAL

C

ONFIGURATION

(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 U c(Ab is ) PO U c(Ab is ) PO U c(Ab is ) PO U c(Ab is ) PO U c(Ab is ) PO U c(Ab is ) PO U c(A) PO U c(A) PO U c(A) PO U c(A) XPU b XPU b XPU b XPU b TNU a TNU a SC U b SC U b D PU f(T C ) D PU f(T C ) D PU f(T C ) D PU f(T C ) D PU g D PU g 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 U c(Ab is ) PO U c(Ab is ) PO U c(Ab is ) PO U c(Ab is ) PO U c(Ab is ) PO U c(Ab is ) PO U c(A) PO U c(A) PO U c(G B ) D PU g D PU g XPU b XPU b XPU b XPU b TNU a TNU a SC U b SC U b XPU b XPU b D PU f(T C ) D PU f(T C ) D PU f(T C ) D PU f(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 U c(Ab is ) PO U c(Ab is ) PO U c(Ab is ) PO U c(Ab is ) PO U c(A) PO U c(A) D PU g D PU g O MU c O MU c XPU b XPU b XPU b XPU b TNU a TNU a SCUb SC U b D PU f(T C ) D PU f(T C ) D PU f(T C ) D PU f(T C ) G C U a G C U a 0 1 2 3 4 5 6 7 8 9 10 11 12 13

T

YPICAL

C

ONFIGURATION

(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 D PU g D PU g XPUb XPU b XPU b XPU b SCUb SCU b D PU f(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 2 c(A bis ) FG 2 c(Ab is ) G O U c(A) G O U c(A) D PU g D PU g XPUb XPU b XPU b XPU b SCUb SCU_b XPU_b XPU_b D PU f(IW F) D PU f(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 2 c(A bis ) FG 2 c(Ab is ) FG 2 c(G B ) G O U c(A) G O U c(A) O MU c O MU c XPUb XPU b XPU b XPU b SCUb SCU b D PU f(IW F) D PU f(IW F) G C U a G C U a 0 1 2 3 4 5 6 7 8 9 10 11 12 13

(70)

T

YPICAL

C

ONFIGURATION

(UO-ATM I

NTERFACE

)

• The AOUc board serves as the Iub interface board. • The UOIc board

serves as the Iu interface board.

Page142

T

YPICAL

C

ONFIGURATION

(UO-ATM I

NTERFACE

)

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

(71)

T

YPICAL

C

ONFIGURATION

(UO-IP I

NTERFACE

)

Page144



In IP mode, GOUc

boards serve as the Iu

and Iub interface

boards.

Page144

T

YPICAL

C

ONFIGURATION

(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.

(72)

S

UMMARY

• 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

T

ERMS

• EPS: extended processing subrack

• MPS: main processing subrack

• TCS: transcoder subrack

• LMT: local maintenance terminal

(73)