bsc 6900 training
DESCRIPTION
BSC 6900 HW TrainingTRANSCRIPT
www.huawei.com
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
47pt
30pt
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: Arial
47pt
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28pt
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细黑体
BSC6900 GSM V900R013
Product Description
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
35pt
32pt
) :18pt
Page2
Foreword
The BSC6900 is an important network element (NE) of
Huawei Single RAN solution. It adopts the industry-leading
multiple radio access technologies, IP transmission mode,
and modular design. It features high capacity, high
integration, excellent performance, and low power
consumption.
The BSC6900 can be flexibly configured as a BSC6900
GSM only, BSC6900 UMTS only, or BSC6900 GU as
required in different networks
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
35pt
32pt
) :18pt
Page3
References
BSC6900 GSM Product Description
BSC6900 GSM Technical Description
BSC6900 GSM Hardware Description
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
35pt
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Page4
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
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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) :18pt
Page5
Contents
1. BSC6900 System Overview
2. BSC6900 Hardware Architecture
3. BSC6900 Signal Flows
4. BSC6900 Typical Configuration
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page6
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
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page7
Capacity
ITEM
Specification
System Capacity (Boards
Supported by BSC6900
V900R012)
System Capacity (Boards
Supported by BSC6900
V900R013)
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.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page8
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.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page9
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 128K×128K switching
capacity.
A maximum of 16,384 active PDCHs are supported.
Maximum traffic: 24,000 Erl
Comprehensive BHCA: 5,900,000
Gb throughput: 1,536 Mbit/s
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page10
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
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page11
Flexible Hardware Configuration
GSM have three kinds of Hardware Configuration
BM/TC separated mode
BM/TC combined mode
A over IP mode
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page13
Smooth evolution from BSC to RNC with software upgrade
Reducing CAPEX by reusing hardware
Dynamic capacity adjustment between 2G&3G
Dual Mode Designs
GSM&UMTS Co-cabinet
Software
Upgrade RNC
RNC
BSC
BSC
BSC
RNC
RNC
RNC
BSC
GSM&UMTS Cabinet
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page14
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
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page17
Contents
1. BSC6900 System Overview
2. BSC6900 Hardware Structure
3. BSC6900 Signal Flows
4. BSC6900 Typical Configuration
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page18
Contents
2. BSC6900 Hardware Structure
2.1 Cabinets
2.2 Subracks
2.3 Subsystems and Boards
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page19
BSC6900 Cabinet
The BSC6900 uses the standard N68E-22 cabinet
The N68E-22 cabinet is of
two types, the single-door
cabinet and the double-door
cabinet
600
mm
2200 mm
800
mm 600
mm
2200 mm
800
mm
N68E-22 Cabinet (Single-door/Double-
door)
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page20
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
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page21
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
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page22
Extended Processing Rack(EPR)
4 EPS
3 EPS
5 EPS
Power distribution box
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
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page23
TransCoder Rack (TCR)
A BSC6900 can be configured with 0
to 2 TCRs.
Components of the cabinet:
Transcoder subrack (TCS)
Power consumption of a GSM TCS≤
1000 W
7 TCS
6 TCS
8 TCS
Power distribution box
TCR
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page25
Contents
2. BSC6900 Hardware Structure
2.1 Cabinets
2.2 Subracks
2.3 Subsystems and Boards
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page26
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
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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DIP Switch on the Subrack
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 OFF ON OFF ON ON
The DIP switch on the subrack consists of eight bits from bit 1 to bit 8.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Slots in the Subrack
(1) Front slot (2) Backplane (3) Rear slot
The boards are installed on both the front and rear sides of the
backplane, which is located in the middle of the subrack.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page29
GSM MPS (in BM/TC Separated Mode)
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
14 27262524232221201918171615
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 1312111098765432
O
M
U
c
O
M
U
c
Front panel
Rear panel
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page30
GSM EPS (in BM/TC Separated Mode)
Front panel
Rear panel
INT
INT
INT
INT
INT
INT
INT
INT
14 27262524232221201918171615
Backplane
XPU
XPU
XPU
XPU
TNUa
TNUa
SCUa
SCUa
DPUg
DPUg
DPUg
0 1 1312111098765432
A BSC6900 GSM can be configured with 0 to 3 EPSs.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page31
GSM MPS (in BM/TC Combined Mode)
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
14 27262524232221201918171615
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 1312111098765432
D
P
U
f
D
P
U
f
O
M
U
c
O
M
U
c
Front panel
Rear panel
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page32
GSM EPS (in BM/TC Combined Mode)
Front panel
Rear panel INT
INT
INT
INT
INT
INT
INT
INT
14 27262524232221201918171615
Backplane
XPU
XPU
XPU
XPU
TNUa
TNUa
SCUa
SCUa
DPUg
DPUg
DPUg
0 1 1312111098765432
INT
INT
INT
INT
DPUf
DPUf
DPUf
DPUf
DPUf
A BSC6900 GSM can be configured with 0 to 3 EPSs.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page33
GSM MPS (in A over IP Mode)
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
14 27262524232221201918171615
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 1312111098765432
D
P
U
f
D
P
U
f
O
M
U
c
O
M
U
c
Front panel
Rear panel
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page34
GSM EPS (in A over IP Mode)
Front panel
Rear panel
INT
INT
INT
INT
INT
INT
INT
INT
14 27262524232221201918171615
Backplane
XPU
XPU
XPU
XPU
TNUa
TNUa
SCUa
SCUa
DPUg
DPUg
DPUg
0 1 1312111098765432
DPUf
DPUf
DPUf
A BSC6900 GSM can be configured with 0 to 3 EPSs.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page35
Transcoder Subrack (TCS)
Front panel
Rear panel
INT
INT
INT
INT
INT
INT
INT
INT
INT
INT
INT
INT
INT
INT
14 27262524232221201918171615
Backplane
TNUa
TNUa
SCUa
SCUa
0 1 1312111098765432
DPUf(opt)
DPUf(opt)
DPUf(opt)
DPUf(opt)
DPUf(opt)
A BSC6900 GSM can be configured with a maximum of four TCSs.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page36
Contents
2. BSC6900 Hardware Structure
2.1 Cabinets
2.2 Subracks
2.3 Subsystems and Boards
2.4 Cables
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page37
BSC6900 Logical Structure
LMT/M2000
Clock
synchronization
subsystem
Switching
subsystem
Interface
processing
subsystem
Service
processing
subsystem
OM subsystem
To BTS/NodeB
To MSC
To other BSCs/RNCs
To SGSN
Clock (optional)
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page38
Switching Subsystem
The switching subsystem performs the following functions:
Provides data and signaling switching
Intra-subrack Media Access Control (MAC) switching
Intra-subrack Time Division Multiplexing (TDM) switching
Inter-subrack MAC and TDM switching
Provides OM channels
Distributes clock signals to each service board
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page39
Network Topologies Between
Subracks MAC switching - star topology
One node functions as the center node and it is connected to each
of the other nodes. The communication between the other nodes
must be switched by the center node.
TDM switching - mesh topology
There is a connection between every two nodes. When any node
is out of service, the communication between other nodes is not
affected.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Structure of the MAC switching subsystem
Page40
Switching Subsystem
High-speed backplane channel
Ethernet cable
Switching
and
control
unit
Another
board
Another
board
Switching
and
control
unit
Switching
and
control
unit
Another
board
Another
board
Another
board
Another
board MPS
TCS
EPS
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page41
Switching Subsystem
Inter-subrack cable for MAC switching
SCU
SCU
SCU
SCU
SCU
SCU
EPS
EPS
MPS
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page42
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
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page43
SCUb Board
Functions
Provides the maintenance management function
Monitors the power supply, fans, and environment of the
cabinet
Supports the port trunking function
Provides configuration and maintenance of a subrack or the
whole BSC
Provides a total switching capacity of 240 Gbit/s
Distributes clock signals and RFN signals for the BSC6900
Working mode
Located in slots 6 and 7
Working in dual-plane mesh topology
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page44
Inter-Subrack Connections
Inter-Subrack SCUa
Interconnection Ethernet Cable
EPS
MPS
SCUa
(Active)
SCUa
(Active)
SCUa
(Standby)
SCUa
(Standby)
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
35pt
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) :18pt
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.
Page45
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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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.
Page46
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page47
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
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page48
TNUa Board
Functions
Provides 128 k * 128 k TDM switching
Allocates the TDM network resources
Supports only GSM
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page49
TNUa Board
Inter-TNUa crossover
cables
between subracks
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page50
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
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page51
Service Processing Subsystem
High-speed backplane
channel
signaling
processing unit
MPS EPS
signaling
processing unit
MPS
SPU 0
SPU 7
processing unit
MPS
SPU 0
SPU 7
Switching Subsystem
DSP 0
DSP 21
DSP 0
DSP 21
Signaling
processing unit
Signaling
processing unit
Data processing
unit
Data processing
unit
MPS EPS
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
35pt
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) :18pt
XPUa Board The XPUa board has four logic subsystems
Main Control XPUa board (MPU)
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.
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
Page52
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
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
35pt
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) :18pt
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 XPUb
board belong to the CPU for Service (CPUS),
which is used to process the services on the
control plane.
Work mode: active and standby
Page53
signaling
SSN0 MPU
SSN7 SPU
signaling
SSN0 SPU
SSN7 SPU
Main control
XPUb
Non-main control
XPUb
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page57
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
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page58
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
Work mode: resource pool
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page59
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.
Work mode: resource pool
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page60
DPUf Board Components
48 DSP chips
Functions
Converts the speech format and forwards data
Encodes and decodes voice services
Provides the Tandem Free Operation (TFO) function
Provides the voice enhancement function
Detects voice faults automatically
Supports GSM only
Work mode: resource pool
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page61
Clock Subsystem
I
N
T
I
N
T
S
C
U
a
I
N
T
I
N
T
S
C
U
a
S
C
U
a
GCUa
Clock module
MPS
8
kHz
To NodeB EPS EPS
8
kHz
19.44 MHz, 32.768 MHz, 8 kHz
Clock cable High-speed backplane
channel
CN BITS GPS
To BTS
To MBTS
19.44 MHz, 32.768
MHz, 8 kHz
19.44 MHz, 32.768
MHz, 8 kHz
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page62
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
Work mode: active and standby
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page63
GCUa/GCGa Board
Clock cable between
the GCUa/GCGa board
and the SCUa board
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page64
Transport Subsystem-Interface
Board Board categorization
PEUa
FG2a
UOIa_IP
GOUa
POUa
Interface
board
IP
Electrical port
E1
FE/GE
Optical port
Channelized
STM-1
Unchannelized
STM-1
STM-1
GE
TDM
Electrical port E1 EIUa
FG2c
POUc
GOUc
Optical port OIUaChannelized
STM-1POUc
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
35pt
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) :18pt
Page65
Interface Processing Subsystem
Board
Type
Transmission
Mode Connector Type Board Supported Mode
INT
TDM
Electrical port EIUa GSM Only
Optical port OIUa 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
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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) :18pt
Page66
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
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page67
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
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page68
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
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page69
FG2c Board
Functions
Provides transmission of IP over Ethernet
Provides 12 channels over FE ports or 4 channels over GE
electrical ports
Provides the routing-based backup and load sharing
Supports the A, Abis, Gb, Iu, Iur, and Iub interfaces
Supports 2048 TRXs when serving as the Abis interface
board, supports 23040 CICs when serving as the A interface
board, and supports a maximum data flow of 1024 Mbit/s
when serving as the Gb interface board
10M/100M/1000M
10M/100M
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page70
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
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page71
POUc Board Functions
Provides four channels over the channelized STM-1/OC-3c optical ports
based on TDM or IP
Supports the Point-to-Point Protocol (PPP)
Provides the line clock recovery function
Provides the board-level Automatic Protection Switching (APS) function
Supports the A, Abis, Gb, Ater, Pb, Iur, and Iub interfaces
In TDM mode, it supports 512 TRXs when serving as the Abis interface
board in POUc over TDM mode, supports 3906 CICs when serving as the A
interface board, and supports 504 Mbit/s throughput when serving as the
Gb interface board.
In IP mode, it supports 2048 TRXs when serving as the Abis interface board
and supports 23,040 CICs when serving as the A interface board.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page73
GOUa Board
Functions
Provides two channels over GE ports, which are used for IP
transmission
Provides the board-level Tributary Protect Switch (TPS)
function
Provides the routing-based backup and load sharing
Supports the A, Abis, Iu, Iur, and Iub interfaces
Supports 384 TRXs when serving as the Abis interface board
and supports 6144 CICs when serving as the A interface board
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
35pt
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) :18pt
Page74
GOUc Board
Functions
Provides four channels over GE ports, which are used for IP transmission
Provides the routing-based backup and load sharing
Supports the extraction of line clock signals
Supports the A, Abis, Gb, Iu, Iur, and Iub interfaces
Supports 2048 TRXs when serving as the Abis interface board, supports
23040 CICs when serving as the A interface board, and supports a maximum
data flow of 1024 Mbit/s when serving as the Gb interface board
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
35pt
32pt
) :18pt
Page75
OM Subsystem
S
C
U
a
S
C
U
a
HUB
O
M
U
O
M
U
S
C
U
a
S
C
U
a
Alarm
box LMT
Extranet MPS
To
M2000
Intran
et
EPS
Ethernet cable
Serial port
cable
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page76
Dual OM Plane
The OMU works in active and
standby mode.
The active/standby OMU boards
use the same external virtual IP
address to communicate with the
LMT or M2000.
The active/standby OMU boards
use the same internal virtual IP
address to communicate with the
SCU boards.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page77
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
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
35pt
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) :18pt
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.
Page78
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page79
Hardware Reliability
Board Redundancy Mode
SCUa/SCUb Board redundancy + port trunking on GE ports
XPUa/XPUbSPUa/SPUb Board redundancy
DPUb/DPUc/DPUd/DPUf/DPUg Board resource pool
GCUa/GCGa Board redundancy
AOUa/AOUc/OIUa/
UOIa/UOIc/POUa/POUc
Board redundancy + MSP 1:1 or MSP 1+1 optical port
redundancy
TNUa Board redundancy
PEUa/AEUa/EIUa Board redundancy
GOUa/GOUc Board redundancy + GE port redundancy or load sharing
FG2a/FG2c Board redundancy + GE/FE port redundancy or load sharing
OMUa/OMUc Board redundancy
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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) :18pt
Page81
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
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
35pt
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Classification of BSC6900 Boards
Page82
Board Logical Function
eXtensible
Processing Unit
(XPU)
SPUa/SPUb
GCP
UCP
RGCP
RUCP
MCP
XPUa/XPUb
GCP
RGCP
MCP
Data Processing
Unit (DPU)
DPUa/DPUc/DPUf GTC/ITC
DPUd/DPUg GPCU
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
35pt
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Page95
Contents
1. BSC6900 System Overview
2. BSC6900 Hardware Structure
3. BSC6900 Signal Flows
4. BSC6900 Typical Configuration
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page96
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
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page97
GSM CS Signal Flow
Abis over TDM & A over TDM
BM/TC
Combined Mode
BM/TC
Separated Mode
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page98
GSM CS Signal Flow
Abis over IP & A over TDM
BM/TC
Separated Mode
BM/TC
Combined Mode
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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) :18pt
Page99
GSM PS Signal Flow
Abis over TDM
Abis over IP
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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) :18pt
Page100
Signaling Flow on the A Interface
A over TDM
BM/TC
Separated Mode
BM/TC
Combined Mode
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page101
Signaling Flow on the A Interface
A over IP
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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) :18pt
Page102
Signaling Flow on the Abis
Interface Abis over TDM
Abis over IP
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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) :18pt
Page103
Signaling Flow on the Gb Interface
Gb over IP/FR
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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) :18pt
Page104
Contents
1. BSC6900 System Overview
2. BSC6900 Hardware Structure
3. BSC6900 Signal Flows
4. BSC6900 Typical Configuration
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
35pt
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) :18pt
Page105
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.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page106
Typical Configuration
Specifications (GSM) 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
DPUc 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
Number of
TCHs/Fs - - 960 - - - 960 - 1920 -
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page107
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 -
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page108
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
EPS 1536 TRXs
1024 TRXs
1536 TRXs
1536 TRXs
R12 R13
R12/R13 R12/R13
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page109
Typical Configuration (V900R013
GO) BM/TC Separated (4096 TRXs)
The DPUf/g board is used.
Abis/Ater/A interface: TDM (optical
transmission)
Gb interface: FR (optical
transmission)
Because of the lack of backplane
TDM resource, the POUc and OIUa
boards that serve as the Ater
interface boards have the same
specifications.
4096TRX
14 15 16 17 18 19 20 21 22 23 24 25 26 27
PO
Uc(A
bis
)
PO
Uc(A
bis
)
PO
Uc(A
bis
)
PO
Uc(A
bis
)
PO
Uc(A
bis
)
PO
Uc(A
bis
)
OIU
a(A
ter)
OIU
a(A
ter)
XP
Ub
XP
Ub
XP
Ub
XP
Ub
TN
Ua
TN
Ua
SC
Ub
SC
Ub
XP
Ub
XP
Ub
DP
Ug
DP
Ug
0 1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25 26 27
PO
Uc(A
bis
)
PO
Uc(A
bis
)
PO
Uc(A
bis
)
PO
Uc(A
bis
)
PO
Uc(A
bis
)
PO
Uc(A
bis
)
OIU
a(A
ter)
OIU
a(A
ter)
OIU
a(A
ter)
OIU
a(A
ter)
XP
Ub
XP
Ub
XP
Ub
XP
Ub
TN
Ua
TN
Ua
SC
Ub
SC
Ub
DP
Ug
DP
Ug
0 1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25 26 27
PO
Uc(A
bis
)
PO
Uc(A
bis
)
PO
Uc(A
bis
)
PO
Uc(A
bis
)
OIU
a(A
ter)
OIU
a(A
ter)
DP
Ug
DP
Ug
OM
Uc
OM
UC
XP
Ub
XP
Ub
XP
Ub
XP
Ub
TN
Ua
TN
Ua
SC
Ub
SC
Ub
PO
Uc(G
B)
GC
Ua
GC
Ua
0 1 2 3 4 5 6 7 8 9 10 11 12 13
TC
14 15 16 17 18 19 20 21 22 23 24 25 26 27
OIU
a(A
ter)
OIU
a(A
ter)
PO
Uc(A
)
PO
Uc(A
)
TN
Ua
TN
Ua
SC
Ub
SC
Ub
DP
Uf(T
C)
DP
Uf(T
C)
DP
Uf(T
C)
DP
Uf(T
C)
0 1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25 26 27
OIU
a(A
ter)
OIU
a(A
ter)
OIU
a(A
ter)
OIU
a(A
ter)
PO
Uc(A
)
PO
Uc(A
)
PO
Uc(A
)
PO
Uc(A
)
DP
Uf(T
C)
TN
Ua
TN
Ua
SC
Ub
SC
Ub
DP
Uf(T
C)
DP
Uf(T
C)
DP
Uf(T
C)
DP
Uf(T
C)
0 1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25 26 27
OIU
a(A
ter)
OIU
a(A
ter)
PO
Uc(A
)
PO
Uc(A
)
TN
Ua
TN
Ua
SC
Ub
SC
Ub
DP
Uf(T
C)
DP
Uf(T
C)
DP
Uf(T
C)
DP
Uf(T
C)
0 1 2 3 4 5 6 7 8 9 10 11 12 13
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page110
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)
4096TRX
14 15 16 17 18 19 20 21 22 23 24 25 26 27
PO
Uc(A
bis
)
PO
Uc(A
bis
)
PO
Uc(A
bis
)
PO
Uc(A
bis
)
PO
Uc(A
bis
)
PO
Uc(A
bis
)
PO
Uc(A
)
PO
Uc(A
)
PO
Uc(A
)
PO
Uc(A
)
XP
Ub
XP
Ub
XP
Ub
XP
Ub
TN
Ua
TN
Ua
SC
Ub
SC
Ub
DP
Uf(T
C)
DP
Uf(T
C)
DP
Uf(T
C)
DP
Uf(T
C)
DP
Ug
DP
Ug
0 1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25 26 27
PO
Uc(A
bis
)
PO
Uc(A
bis
)
PO
Uc(A
bis
)
PO
Uc(A
bis
)
PO
Uc(A
bis
)
PO
Uc(A
bis
)
PO
Uc(A
)
PO
Uc(A
)
PO
Uc(G
B)
DP
Ug
DP
Ug
XP
Ub
XP
Ub
XP
Ub
XP
Ub
TN
Ua
TN
Ua
SC
Ub
SC
Ub
XP
Ub
XP
Ub
DP
Uf(T
C)
DP
Uf(T
C)
DP
Uf(T
C)
DP
Uf(T
C)
0 1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25 26 27
PO
Uc(A
bis
)
PO
Uc(A
bis
)
PO
Uc(A
bis
)
PO
Uc(A
bis
)
PO
Uc(A
)
PO
Uc(A
)
DP
Ug
DP
Ug
OM
Uc
OM
Uc
XP
Ub
XP
Ub
XP
Ub
XP
Ub
TN
Ua
TN
Ua
SC
Ub
SC
Ub
DP
Uf(T
C)
DP
Uf(T
C)
DP
Uf(T
C)
DP
Uf(T
C)
GC
Ua
GC
Ua
0 1 2 3 4 5 6 7 8 9 10 11 12 13
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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Page111
Typical Configuration (V900R013
GO)
The DPUf/g board is used.
All-IP transmission is used.
Abis/A/Gb interface: IP
All-IP transmission 4096TRX
14 15 16 17 18 19 20 21 22 23 24 25 26 27
DP
Ug
DP
Ug
XP
Ub
XP
Ub
XP
Ub
XP
Ub
SC
Ub
SC
Ub
DP
Uf(IW
F)
0 1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25 26 27
FG
2c(A
bis
)
FG
2c(A
bis
)
GO
Uc(A
)
GO
Uc(A
)
DP
Ug
DP
Ug
XP
Ub
XP
Ub
XP
Ub
XP
Ub
SC
Ub
SC
Ub
XP
Ub
XP
Ub
DP
Uf(IW
F)
DP
Uf(IW
F)
0 1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25 26 27
FG
2c(A
bis
)
FG
2c(A
bis
)
FG
2c(G
B)
GO
Uc(A
)
GO
Uc(A
)
OM
Uc
OM
Uc
XP
Ub
XP
Ub
XP
Ub
XP
Ub
SC
Ub
SC
Ub
DP
Uf(IW
F)
DP
Uf(IW
F)
GC
Ua
GC
Ua
0 1 2 3 4 5 6 7 8 9 10 11 12 13
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
35pt
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) :18pt
Page112
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.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
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) :18pt
Page113
Terms
EPS: extended processing subrack
MPS: main processing subrack
TCS: transcoder subrack
LMT: local maintenance terminal
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