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2009/06 Security Level: Internal Use
www.huawei.com
BSC6900V9R011 GO Hardware Structure
and System Description
TSD Wireless Product Service Department-GBSS
ISSUE1.0
Page 2HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
The BSC6900 is an important network
element of Huawei Single RAN solution. It
adopts the industry-leading multiple radio
access technologies, IP transmission
mode, and modular design. The BSC6900
can be flexibly configured as a BSC6900 G
SM, BSC6900 UMTS, or BSC6900 GU as r
equired in different networks.
Page 3HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Know the functions and features of BSC6900
Master the hardware structure of BSC6900
Master the signal flow
Master the typical configuration of BSC6900
Page 4HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Reference
BSC6900 Technical Description
BSC6900 Hardware Description
Page 5HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Chapter 1 BSC6900 System DescriptionChapter 1 BSC6900 System Description
Chapter 2 BSC6900 Hardware Structure
Chapter 3 BSC6900 Signal Flow
Chapter 4 BSC6900 Typical Configuration
Page 6HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Location
The interfaces between the BSC6900 GSM and each
NE in the UMTS network are as follows: Iub Interface: the interface between the NodeB and RNC. Iur Interface: the interface between the RNC and RNC. Iu-CS Interface: the interface between the MSC and MGW. Iu-PS Interface: the interface between the RNC and SGSN Iu-BC Interface: the interface between the RNC and CBC
The interfaces between the BSC6900 GSM and each NE i
n the GSM network are as follows: Abis Interface: the interface between the BTS and BSC A Interface: the interface between the BSC and MSC or MGW Gb Interface: the Interface between the BSC and SGSN
Page 7HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
BSC6900V9R11C00BSC6900V9R11C00
BSC6000/BSC6810
Unitary logic
Frame
Unitary OM SMP
Configuration Maintenance Alarm Performance OS Internal
Communication
Unitary
Resource
Management Co-
Transmission
Unitary Control
Plane GBSC Control
Plane Optimize
XPUb DPUe POUc FG2c GOUc UOIc AOUc
Frame Unitary Multi-kernel Boards
Transmission and Resource Management
Unitary
Pool resource
BSC6900 New Features
Page 8HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
• Smooth evolution from BSC to RNC with software upgrade• Reducing CAPEX by reusing hardware• Dynamic capacity adjustment between 2G&3G
Software upgrade
BSC6900 Product Characters - multi-mode amalgamation
BSC
BSC
RNC
RNC
RNC
BSC
GSM&UMTS cabinetGSM&UMTS co-cabinet
RNC
RNC
BSC
Page 9HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
• Centralized OMC for GSM&UMTS, unified platform for network construction, 2G/3G network pl
anning, performance evaluation and trouble shooting etc.
• Simplifying the network architecture, reducing co-ordination and maintenance effort, man
power and OPEX Saving
PM Management
Configuration Management
Network Optimization
Fault Management
iManagerTM M2000
Unified OAM toolkits: Easier 2G/3G trouble shooting
Unified GENEX : Unified 2G/3G network planning, performance evaluation and performance trouble shooting
Unified CME : Simultaneous 2G/3G data configuration, correctness and efficiency guaranteed
BSC6900 Product Characters - Co OAM
Page 10HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
pT
RA
Up
TR
AU
IPUNI-BTS
UNI-BTSUNI-BSCCo-transmission
UDP
IP
/
PPP
IP SW
Router
FP
FP
FP
3G
2G
3G
2G
pT
RA
U
pT
RA
U
FP
FP
FP
UDP
IP
/
PPP
IP SW
Router
pTRAU
Inte
rface
bo
ardIn
terfa
ce b
oard
5-10% Gain
0.2 0.1 0.05 0.03 0.02 0.01 0.005 0.002 0.001GOS
Tra
ffic
Ga
in (
%)
10
9
8
7
6
5
4
3
2
1
0• With unified transport resource management,
bandwidth can be shared by UMTS&GSM.
Without Co-trans Co-trans
UMTS / GSM UMTS + GSMTraffic Traffic rejectionrejection
Multiplexing
Gain
BSC6900 Product Characters - Co TRM
Page 11HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
UMTS
GSM
Cs service PS service
Service direction on UMTS/GSM
HeavyLoad
HeavyLoad
HeavyLoad
HeavyLoad
UMTS
GSM
Load control between UMTS/GSM
Load control by inter-RAT HO
3G/2G cell load consideration make traffic
load spread in UMTS&GSM evenly, network
usage efficiency improved
3G/2G cell load consideration make it more
accurate for the service direction, better
performance achieved
Huawei Lab Simulation
BSC6900 Product Characters - Co RRM
Page 12HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
SW upgrade with Legacy HW + New HW (optional)
SW upgrade with Legacy HW + New HW (expansion)
BSC6000 BSC6810 and BSC6900 Evolution Paths
200920082006 2010Q12008Q3
GBSS8.1/RAN10 GBSS9.0/RAN11 GBSS12.0/RAN12
BSC6000
SW upgrade with Legacy HW + New HW (optional)
BSC6810
BSC6900 BSC Only
2009Q2
BSC6900 RNC Only
2009Q1
BSC6900 Dual mode
Note : Legacy HW is HW available from GBSS8.1/RAN10.0 for BSC6900
BSC6900 BSC Only
BSC6900 RNC Only
BSC6900 Dual mode
BSC6810
Naming changing to BSC6900
SW upgrade with Legacy HW + New HW (expansion)
SW upgrade with Legacy HW + New HW (optional)
SW upgrade
Naming changing to BSC6900
Page 13HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
BSC6900 Capacity Index
BSC6900 GSM only
Item 1MPS+1TCS 1MPS+1EPS+2TCS 1MPS+2EPS+2TCS
Number of
cabinets
2 2 2
BHCA(K) 1750 3500 5250
Traffic volume
( Erl )6500 13000 19500
Number of TRXs 1024 2048 3072
Number of active
PDCHs ( MCS-
9 )
4096 8192 12288
Typical configuration specifications of the BSC6900 GSM(BM/TC separated and Abis over non-IP R11 board)
Page 14HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Chapter 1 BSC6900 System Description
Chapter 2 BSC6900 Hardware StructureChapter 2 BSC6900 Hardware Structure
Chapter 3 BSC6900 Signal Flow
Chapter 4 BSC6900 Typical Configuration
Page 15HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Chapter 2 BSC6900 Hardware StructureChapter 2 BSC6900 Hardware Structure
2.1 Frame and Subrack
2.2 Board Introduction
2.3 Cable Introduction
Page 16HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
BSC900 Hardware--Cabinet The BSC6900 uses the Huawei N68E-22 cabinet and the Huawei
N68-21-N cabinet.
The two models of cabinets have the same appearance.N68E-22 is
divided into a single-door cabinet or a double-door cabinet.
Item Specification
Height of the available space
46U
Weight Empty cabinet≤100 kg
Cabinet in full configurati
on≤300 kg
Input voltage range
-40 V to -57 V
Page 17HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
BSC900 Hardware--Cabinet
The BSC6900 GSM cabinet is classified into
main processing rack (MPR), extended proc
essing rack (EPR), and transcoder rack (TC
R).
Page 18HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
BSC900 Hardware--Subrack The BSC6900 GSM subrack has a standard width of 19 inches. The height
of each subrack is 12 U. The boards are installed on the front and rear side
s of the backplane, which is positioned in the center of the subrack.
A subrack provides 28 slots. The slots on the front of the subrack are numb
ered from 0 to 13, and those on the rear are numbered from 14 to 27.
Page 19HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
BSC900 Hardware--Subrack
1 Fan box 2 Mounting ear 3 Guide rail
4 Front cable trough
5 Boards 6 Grounding screw
7 DC power input port
8 Port for the monitoring signal cable of the power distribution box
9 Cover plate of the DIP switch
Front ViewRear View
Classification of BSC6900 GSM subracks
Item Index
Height of the subrack 12U
Weight of the subrack Empty: 25kg;
Full configuration≤57kg
Consumption l MPS subrack: 1000W
l EPS subrack: 1000W
l TCS subrack:1000W
Page 20HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
DIP Switch on the SubrackThe DIP switch on the subrack has eight bits numbered in ascending o
rder from 1 to 8
If the bit is set to ON, it indicates 0. If the bit is set to OFF, it indicates
1.
Page 21HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
DIP Switch on the Subrack
The function of the switch 6?
Subrack nu
mber
Subrack code
1 2 3 4 5 6 7 8
Subrack 0 ON ON ON ON ON ON ON OFF
Subrack 1 OFF ON ON ON ON OFF ON OFF
Subrack 2 ON OFF ON ON ON OFF ON OFF
Subrack 3 OFF OFF ON ON ON ON ON OFF
Subrack 4 ON ON OFF ON ON OFF ON OFF
Subrack 5 OFF ON OFF ON ON ON ON OFF
Page 22HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Chapter 2 BSC6900 Hardware StructureChapter 2 BSC6900 Hardware Structure
2.1 Frame and Subrack
2.2 Board Introduction
2.3 Cable Introduction
Page 23HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
BSC6900 Overall Structure The overall structure of the BSC6900
Switching Subsystem;
Service Processing Subsystem;
Clock Synchronization Subsystem;
Interface Synchronization Subsystem;
OM Subsystem.
GO-Mode
Page 24HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Switching Subsystem Functions
Provides intra-subrack Medium Access Control (MAC) switching
Provides intra-subrack Time Division Multiplexing (TDM) switching
Distributes clock signals to the service processing boards
Provides inter-subrack switching
Provides switching channels for traffic data
Provides OM channels
Hardware Involved TDM switching - TNUa board
MAC switching - SCUa board
Page 25HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Board——TNUa
Port Function Matching
connector
TDM0 ~ 5 TDM high-speed serial port, used to connect
the TNUaS between subracks
DB14
GTNU
PARC
RUN
ALM
ACT
TN
M5
TN
M4
TN
M0
TN
M1
TN
M2
TN
M3
The TNUa is the TDM switching unit in the BSC6900.
The active and standby TNUa are inserted in slot 4 and slot 5. Th
e TNUa board performs the TDM switching function, which is the
TDM switching center of the system.
The TNUa has the following functions:
Providing 128 K ×128 K TDM switching
Allocating TDM network resources, establishing, and releasing ra
dio links
Page 26HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Board——SCUa
Port Function Matching
EHT0~ 9 10M/100M/1000M Ethernet ports, used to connect subracks RJ45
EHT10~ 1
1
10M/100M/1000M Ethernet ports, used to connect GBAM (Only the m
ain subrack is connected with the GBAM)
RJ45
COM Debugging port RJ45
CLKIN Clock source port, used to receive the 8 kHz clock signals from the
panel of the GGCU
RJ45
TESTOUT Clock test signal port, used to output clock test signals SMB connector
The SCUa is the switching control unit in the BSC6900.
The active and standby SCUa are inserted in slot 6 and 7. The SCUa board provides maintenance management of the subrack and GE switching platform for the subrack.
The SCUa has the following functions:
Performing maintenance management of the subrack
Providing a GE platform for the subrack
Providing clock information for the other boards in the same subrack except the GCUa
ACTLINK
ACTLINK
ACTLINK
Page 27HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Service Processing Subsystem Functions
User data transfer
Radio channel ciphering and deciphering
System admission control
Data integrity protection
Mobility management
Cell broadcast service control
Data volume reporting
Radio access management
CS service processing
PS service processing
Radio resource management and control
System information and user message tracing
Page 28HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Service Processing Subsystem
Hardware Involved XPUa/b board, SPUa/b board, DPUa/b/c/d/e board
Board Specification
XPU/SPU is the signaling processing unit
SPU board can process GSM/UMTS signaling panel, XPU board can process
GSM signaling panel
SPU board Works for BSC6900 GU mode
XPU board Works for BSC6900 GSM only mode
The postfix of “a” board contain 4 logic subsystem, and the postfix of “b” board
contain 8 logic subsystem
Services Process Unit DPUa/b/c/d/e
Page 29HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Board Introduction-XPU/SPU
Loaded with different software, the XPUa board is functionally di
vided into main control XPUa board and non-main control XPUa
board.
XPUa
PARC
RUN
ALM
ACT
10
/10
0/1
00
0B
AS
E-T
ACTLINK
0
1
2
3
The 0 subsystem of main control XPU/SPU boa
rd is MPU, used to manage the user panel and
signaling plane resources within the subrack an
d process the signaling.
The subsystem of non-main control XPU/SPU b
oard is CPU, used to process the signaling.
For GSM Only mode, one MPU for the system i
s enough. If the system upgrade to GU mode, o
ne MPU should for one subrack.
Main control XPUa
Non-Main control XPUa
Page 30HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Board Introduction——DPUc
Function
DPUc process CS services and perform the voice coding and deco
ding function. It works as subrack system pool mode.
Provides the speech format conversion and data forwarding functi
ons when configured in BM subrack.
Provides the Tandem Free Operation (TFO) function
Provides the voice enhancement function
Detects voice faults automatically
DPUd board works for GSM services.
DPUa
PARC
RUN
ALM
ACT
Page 31HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Board introduction——DPUd
Function
The DPUd is the Data Processing Unit for PS services. It can be
installed in slots 8–11 in MPS and 8-27 in EPS , it processes th
e packet services for the BSC.
Each DPUd supports 1024 activated PDCHs at the same time, a
nd all the PDCHs support MSC-9 coding.
Packet links processing function.
PS fault self-detection.
DPUd board works for GSM services.
DPUa
PARC
RUN
ALM
ACT
Page 32HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Subsystems Five: Interface Board System
Board
Type
Physical Board
Board specification Scene
EIUa Transmits, receives, encodes, and decodes 32 E1s/T1s. GSM Only
OIUa Provides one STM-1 port for TDM transmission GSM Only 、 GU
Old Boards
FG2a Provides eight channels over FE ports or two channels over GE electrical ports
GSM Only 、 GU
GOUa Provides two channels over GE optical ports GSM Only 、 GU
PEUa Provides 32 channels of E1s/T1s for HDLC transmissionExtracts line clock signals
GSM Only 、 GU
Multi-kernel Boards
FG2c Provides 12 channels over FE ports or four channels over GE electrical ports
GSM Only 、 GU
GOUc Provides four channels over GE optical ports GSM Only 、 GU
POUc Provides four channels over channelized optical STM-1/OC-
3 ports based on IP protocol
Extracts line clock signals
GSM Only 、 GU
Page 33HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Mapping for Interface Board and VersionPhysica
l
Board
Function Interface TypeAbis Ater A Gb Pb
PEUa FR BSC V9R8C01
HDLC BSC V9R8C01
IP mBSCV9R11
mBSCV9R11
FG2a IP BSC V9R8C01
BSC V9R8C01
BSC V9R8C01
GOUa IP BSC V9R8C01
BSC V9R8C01
POUc TDM+ HDLC
mBSC V9R11 mBSC V9R11 mBSC V9R11 mBSC V9R11 mBSC V9R11
IP mBSC V9R11 mBSC V9R11 mBSC V9R11 FG2c IP mBSC V9R11 mBSC V9R11 mBSC V9R11 GOUc IP mBSC V9R11 mBSC V9R11 mBSC V9R11 EIUa Abis TDM BSC V9R1
Ater TDM BSC V9R1 Pb TDM BSC V9R1A TDM BSC V9R1
OIUa Abis TDM BSC V9R1 Ater TDM BSC V9R1 Pb TDM BSC V9R1A TDM BSC V9R1
Page 34HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Co-Transmission for the Interface BoardPhysical
Board
Function Interface Board Sharing
Iub Iu(Iur/IuCS/IuPS)
Abis A Ater Gb
FG2a IP Iub/Iu Co-Interface board Abis/A Co-Interface board Gb Separated
GOUa IP Iub/Iu Co-Interface board Abis/A Co-Interace board Gb Separated
AOUc ATM Iub/Iu Co-Interface board UOIc ATM Iub/Iu Co-Interface board
IP Iub/Iu/Abis/A(Ater) 共接口板 POUc TDM+ HDLC Abis/A(Ater)/Gb(Pb) Co-Interface board
IP Iub/Iu/Abis/A(Ater) Co-Interface board FG2c IP Iub/Iu/Abis/A(Ater)/Gb(Pb) Co-Interface board
GOUc IP Iub/Iu/Abis/A(Ater)/Gb(Pb) Co-Interface board
EIUa Abis TDM Ater TDM Pb TDM A TDM
OIUa Abis TDM Ater TDM Pb TDM
A TDM
Page 35HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Board Introdction-FG2c The FG2c board supports IP over Ethernet transmission.
The FG2c board performs the following functions:
Provides 12 channels over FE ports or four channels over GE electric
al ports
Provides the link aggregation function at the MAC layer
Provides the routing-based backup and load sharing
Supports the transmission of data over all its Ethernet ports on the ba
sis of the synchronized clock signals
Supports the Abis 、 A 、 Gb 、 Iu 、 Iub interfacesPort Function Connector type
10/100BASE-T 10M/100M Ethernet ports, used to transmit 10/100M
signals
RJ45
10/100/1000BASE-
T
10M/100M/1000M Ethernet ports, used to transmit
10/100/1000M signals
RJ45
2M0 、 2M1 Port for 2 MHz clock signal outputs male connector
Page 36HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Board Introduction-GOUc
As an optical interface board, the GOUc board supports IP ov
er Ethernet transmission.
The GOUc board performs the following functions:
Provides four channels over GE optical ports
Provides the routing-based backup and load sharing
Extracts line clock signals
Supports the Abis, A, and Gb,Iu, Iub interfaces
Port Function Connector
Type
RX Optical port, used to transmit and receive optical signals. TX
refers to the transmitting optical port, and RX refers to the
receiving optical port.
LC/PC
TX
2M0 、 2M1 Port for 2 MHz clock signal outputs SMB male
connector
Page 37HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Board Introduction-POUc As an interface board, the POUc board supports IP over channeliz
ed STM-1/OC-3 transmission.
The POUc board performs the following functions: Provides four channels over channelized optical STM-1/OC-3 ports based o
n IP protocol
Supports the PPP function
Extracts line clock signals
Provides the Automatic Protection Switching (APS) function between the a
ctive and standby POUc boards
Supports the A, Abis, Gb, Ater,Pb, Iu, Iub interfaces
Port Function Connector type
RX Optical port, used to transmit and receive optical signals. TX refers to the
transmitting optical port, and RX refers to the receiving optical port.
LC/PC
TX
2M0
2M1
Output ports for clock signals. These ports are used to transmit the 2 MHz line
clock signals to the GCUa/GCGa board. The clock signals are extracted from u
pper-level devices and serve as the clock sources of the BSC6900 system.
SMB male
connector
Page 38HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Subsystems Four: Clock Subsystem Clock Source
Bits clock
Line clock
GPS
Reference Clock for the MPS or EPS
The reference clocks are provided by the GCUa. The reference clocks generate 8kHz clock signals through the GCUa.
MPS: The clock signals are sent to the SCUa in the MPSa subrack through the backplane. Then, the clock signals are sent to other boards in the same subrack.
EPS: The clock signals are sent to the SCUa board in the EPSa subrack through th
e clock cable. Then, the signals are sent to other boards through the backplane.
Reference Clock for the TCS
Each TCS extracts line clock from the A interface. The line clock is processed through A interface panel and then generates 8 KHz clock signals.
The clock signals are sent to the SCUa in the subrack through the backplane. Then the clock signals are sent to other boards in the same subrack.
Page 39HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Structure of the Clock Synchronization Subsystem
High-speed backplane channel
RINT
RINT
SCUa
RINT
RINT
SCUa
SCUa
GCUa/GCGa Clock module
RSS
8kHz
To BTS/NodeB
To BTS/NodeBTo BTS/NodeBRBS RBS
19.44MHz, 32.768MHz, 8KHz
19.44MHz, 32.768MHz, 8KHz
19.44MHz, 32.768MHz, 8KHz
8kHz
Clock cable
CN BITS GPS
8kHz
Page 40HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Board——GCUa
GGCU
PARC
RUNALMACT
8
9
COM0
COM1
0
1
2
3
4
5
6
7
CLK
OU
TT
ES
TIN
TE
ST
OU
T
CL
KLI
N1
CL
KLI
N0
The GCUa is the general clock unit in the BSC6900. The active and
standby GCUa are configured in slots 12 and 13 in the MPS. The G
GCU board provides synchronous timing signals for the system
The GCUa has the following functions:
Generating and keeping synchronous clock signals
Keeping the consistency of synchronization information output from the active
and standby GCUa
Port Function Connector type
ATN-IN Reserved SMA male connector
CLKOUT0~9
Ports for transmitting synchronization clock signals. The ten
ports are used to transmit the 8 kHz clock signals to the
CLKIN port on the panel of the SCUa board.
RJ45
COM0,COM1 Reserved RJ45
TESTOUT Reserved SMB male connector
TESTIN Input port for testing external clock signals SMB male connector
CLKIN0-1Synchronization clock input port, used to receive the 2.048
MHz clock signals or 2.048 Mbit/s code stream signals
SMB male connector
Page 41HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
M2000
SCUa
SCUa
LANSWITCH
OMUa
OMUa
SCUa
SCUa
WEB LMT External network
MPS
Internal network
EPS
Internet cable
Serial cable
Subsystems Five: O&M Subsystem
Page 42HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Board Introduction —— OMU The OMUa board works as a bridge for the communication betwe
en the WebLMT and the other boards in the BSC6900.
Function
Performing the configuration management, performance management,
fault management, security management, and loading management f
unctions for the system
To control the communication between the LMT/M2000 and the SCU
a board of the BSC6900
(1) Captive screw (2) Shielding finger (3) Ejector lever (4) LED (RUN)
(5) LED (ALM) (6) LED (ACT) (7) Button (RESET) (8) Button (SHUTDOWN)
(9) USB port (10) Ethernet port (ETH0)
(11) Ethernet port (ETH1)
(12) Ethernet port (ETH2)
(13) COM port (14) VGA port (15) LED (HD) (16) LED(OFFLINE)
(17) Hard disk (18) Screw for fixing the hard disk
Page 43HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Chapter 2 BSC6900 Hardware StructureChapter 2 BSC6900 Hardware Structure
2.1 Frame and Subrack
2.2 Board Introduction
2.3 Cable Introduction
Page 44HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
TNUa ( Active )
Board
Board
LVDS TDM path of backplane
Inter-TNUa Cable
TNUa ( Standby )
TNUa ( Active )
Board
BoardTNUa ( Standb
y )
TDM Switching Subsystem Intra-Subrack: Other boards in the subrack connect with TNUa (Activ
e/Standby) through LVDS (Low Voltage Differential Signal) high spee
d serial ports of backplane.
Inter-Subrack: TDM units of every subrack fully interconnected with e
ach other through TNUa crossover cables.
In full intra-subrack interconnection, 2 cables support 8K bandwidth.
Page 45HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Inter-Subrack Interconnections of TNUa Crossover Cables
1 #
0 #TNUa TNUa
TNUa TNUa
2 #TNUa TNUa
Page 46HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Interconnection Between SCUa Active/standby SCUa boards: HiG interconnection; 30G bandwidth.
Intra-subrack : The SCUa board provides 48G GE switching capability th
rough backplane.
Inter-subrack : The SCUa boards are connected in star topology throug
h intercross cable using the GE ports on SCUa.
Switching and control
unit
Other board
Other board
Other board
Other board
Other board
Other board
Switching and control
unit
Switching and control
unit
RSS
RBS
RBS
High-speed backplane channel
Network cable
Page 47HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
The Physical Cable Between Subracks SCUa in MPS subrack
GE0 ~ 7 interconnect with EPS, open the port by MML command.
GE8/9 interconnect with main TCS
GE10/11 interconnect with GBAM
SCUa in EPS subrack
GE0 ~ 1 interconnect with MPS
Page 48HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Interconnection Between Subrack
A interface
Pb interface Abis interfaceAter interface
Subracks of BSC6000 compose an interconnection switching network through cascade.
TCS
TCS TCS TC
EPS
MPS EPSBM
SCUa Star interconnection
TNUa Full interconnection
Page 49HUAWEI TECHNOLOGIES CO., LTD. All rights reserved
Clock Synchronization Interconnection The connection of the GCUa of the main s
ubrack and the extension subrack is show
n: The active and standby GCUa output 10-way s
ignal channel respectively. A signal channel of
an active GCUa and that of a standby GCUa a
re integrated through the Y-shaped cable.
Any of component including GCUa, Y-shaped cable, and SCUa is faulty, the system clock stil
l can work normally.
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Chapter 1 BSC6900 System Description
Chapter 2 BSC6900 Hardware Structure
Chapter 3 BSC6900 Signal FlowChapter 3 BSC6900 Signal Flow
Chapter 4 BSC6900 Typical Configuration
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GSM CS Signal Flow Abis over TDM+A over TDM
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GSM CS Signal Flow Abis over HDLC/IP+A over TDM
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GSM CS Signal Flow Abis over TDM+A over IP
Abis over HDLC/IP+A over IP
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GSM PS Signal Flow (Inner-PCU) Abis over TDM
Abis over HDLC/IP
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Signaling Flow on the A Interface Abis over TDM+A over TDM
the signaling processing board XPUa processes the signaling accor
ding to the MTP3, SCCP, and BSSAP protocols.
A Over IP
The A interface board processes the MTP2 protocol
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Signaling Flow on the Abis Interface Abis over TDM/IP/HDLC
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Signaling Flow on the Gb Interface Gb Over IP
the signaling processing board processes the signaling accordin
g to the NS and BSSGP protocols. Then, the signaling is transm
itted to the Gb interface board through the SCUa board.
The Gb interface board processes the signaling according to the
IP or FR protocol. Then, the signaling is transmitted to the SGS
N over the Gb interface.
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OM Signal Flow
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Chapter 1 BSC6900 System Description
Chapter 2 BSC6900 Hardware Structure
Chapter 3 BSC6900 Signal Flow
Chapter 4 BSC6900 Typical ConfigurationChapter 4 BSC6900 Typical Configuration
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Specification of the Board XPUa/XPUb
350TRX/XPUa 640TRX/XPUb
No. of XPUa=TRX No./350TRX No. of XPUb=TRX No./640TRX
For GSM only system, we can be configured just one main control XPU, whi
ch configured as RGCP
The control panel optimized for BSC6900, XPUa/XPUb can congfigured in d
ifferent subrack with Transcode board and interface board averagely.
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Specification of the Interface Board
Physical
Board
Function Interface TypeAbis Ater A Gb Pb
POUc TDM+ HDLC
512TRX 7168CIC 3906CIC 395Mbps mBSC V9R11
IP 2048TRX 23040CIC
23040CIC
FG2c IP 2048TRX 23040 790Mbps GOUc IP 2048TRX 23040 790Mbps EIUa Abis
TDM256TRX
Ater TDM 968CIC Pb TDM 968CICA TDM 968CIC
OIUa Abis TDM
512TRX
Ater TDM 1890CIC Pb TDM 1890CICA TDM
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Typical Configuration Parameter Description
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Typical Configuration Parameter Description
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