omd801101 bsc6000 hardware structure issue1
DESCRIPTION
huaweiTRANSCRIPT
www.huawei.com
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
BSC6000
Hardware Structure
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page1
Foreword
This course describes the hardware structure of the
HUAWEI BSC6000 system, board module functions, system
operating principles, system signal flows, and O&M flows. In
addition, this course describes the principles of hardware
configuration and lists some typical configurations
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page2
References
BSC6000 Hardware Description
BSC6000 Product Description
BSC6000 Performance Description
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page3
Objectives
Upon completion of this course, you will be able to:
Understand BSC6000 function and features
Master BSC6000 hardware structure
Understand BSC6000 system principle
Master BSC6000 typical configuration
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page4
Contents
1. System Description
2. Hardware Structure
3. System Logical Structure
4. System Signal Flow
5. Typical Configuration
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page5
Location of the BSC6000
The HUAWEI BSC6000 is a new generation GSM BSC
product after M900/M1800 BSC
SGSN
MSC
GGSN
.
HLR
Abis
BSC6000
MSBTS
MSBTS
MSBTS
UmPDN
AGs
Gb
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page6
BSC6000 Version Evolution
V9R1C01V9R1C03
V9R8C01
V9R3C001
R1 R3 R8
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page7
Large capacity High integration
Supporting 2048TRX at the full rate; supporting 2048TRX at
the half rate
Maximum of traffic: 13,000 Erl; BHCA : 3,500,000
Maximum number of subscribers :650,000
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page8
Large capacity High integration
BM/TC combined,1 cabinet support 2048TRX
BM/TC separated, 2 cabinets support 2048TRX
2048TRX
2048TRX
+
BM TC
BM+TC
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page9
PCU6000
Built-in PCU, Advanced PS Performance
One GDPUP supply 1024 MCS-9 active PDCH processing,
BSC6000 support 8192 MCS-9 active PDCH at most
Support 512M Gb throughput at most
14 15 16 17 18 19 20 21 22 23 24 25 26 27
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0 1 2 3 4 5 6 7 8 9 10 11 12 13
GOMU GOMU
BSC6000
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page10
Support BSS Over IP
A Interface
Over IP
Abis
Interface
Over IP
F
G
2
a
IP route transmitting
protocol function
8FE ports or 2GE ports
Support IP over
FE/GE/IWF
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IP route transmitting
protocol function
Supply 2 optical ports
Support IP over GE
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Support 6144 voice circuits;
Support A interface over IP
384TRX,100% Half Rate
Supply Abis interface by
FE/GE
384TRX,100% Half Rate
Supply Abis interface by
GE
Support 6144 voice circuits
Support A interface over IP
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page11
Support Abis over HDLC
P
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a
Supply HDLC over
E1/T1
Supply 32E1/T1
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384TRX,100% Half Rate.
Typical configuration is one E1 could
bear24TRX(FR) or 21TRX(HR).
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page12
Flexible configuration
Multiple networking modes
Based on E1/T1 or STM-1 networking, the BSC6000 and the BTSs
can use the star, chain, and tree networking modes
Service-oriented hardware configuration
The configuration for the Circuit Switched domain (CS) service and
Packet Switched domain (PS) service is flexible. The system can be
configured according to different requirements on voice and data
services in different phases of network construction
Smooth capacity expansion and upgrade
Smooth capacity expansion
Online capacity expansion, online patching
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page13
Features of the BSC6000 System
Strong performance, advanced design
Supporting 2M signaling link
Supporting local multiple signaling points
Supporting TC resource pool
Supporting full-index report performance statistics
MML function
Support built-in GOMU
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page14
Contents
1. System Description
2. Hardware Structure
3. System Logical Structure
4. System Signal Flow
5. Typical Configuration
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page15
Contents
2. Hardware Structure
2.1 Rack
2.2 Subrack
2.3 Board
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Structure of Rack
Model: Huawei N68-22 cabinet
Dimension: 600mm (width) x800mm (depth) x
2200mm (height)
Weight: 150 kgs of Empty cabinet; 350 kgs of
full configuration
BSC6000 rack type
GBCR: GSM BSC Control Processing Rack
GBSR: GSM BSC Service Processing Rack
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page17
GBCR
The GBAM and GOMU are the operation
and maintenance entities of the BSC. There
are two types of BSC hardware
configuration: type A and type B. In
configuration type A, the BSC is configured
with the GBAM. In configuration type B, the
BSC is configured with the GOMU
One BSC can use only one configuration
type
GBAM
LAN Switch
KVM
Power
distribution box
Subrack
Fan box
Cabling
subrack
Type A GIMS
Type B,this location is
configured with GMPS
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GBSR
GBSR (GSM BSC Service
Processing Rack ): It is only
configured with service subracks
One service rack can be
configured with three subracks at
most according to the requirement
The three service subracks consist
of two types: GEPS and GTCS
Subrack
Subrack
Subrack
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Fan Box
PFCU (Fan Control Unit)
Monitors the running status of the fans in the fan box
Reports the working status of the fan box to GSCU
Detects the temperature of the fan box with a temperature sensor
Shows the current status of fan box and alarms through LED
PFPU (Fan Power Unit)
provides power supply for nine fans
keeps the voltage stable
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Power Distribution Box
Checks two channels of - 48 V input voltage
Detects one route of external temperature sensor; detects one route
of external humidity sensor; detects two lightning protection
components; detects the status of six distributed-power output
switches
Reports the status of the power distribution box and exchanges
O&M information with the GSCU
Emits audio and visual alarms
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Subrack
The width of subrack is 19
inches
A backplane is in the middle of
the subrack, and boards are
inserted from the front and the
rear of the subrack
Both the front subrack and the
rear subrack provide 14 slots
Numbered as 00 --13 from left to
right at the front
Numbered as 14--27 from right
to left at the back
Board
Fan box
Cabling
Trough
Front of subrack Rear of subrack
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page22
Subrack Type
The BSC subracks can be classified into the following types:
GMPS--GSM Main Processing Subrack
GEPS--GSM Extended Processing Subrack
GTCS--GSM TransCoder Subrack
Generally, both the GMPS and GEPS are referred to the
BM subrack, and the GTCS is referred to as the TC subrack
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page23
Configuration Modes of Subracks
The BSC subracks support the following configuration
modes:
BM/TC separated-- In BM/TC separated configuration mode, the BSC
consists of the GMPS/GEPS and GTCS. The GTCS can be
configured on the BSC side or on the MSC side based on the OM
path between the GMPS and the GTCS
BM/TC combined-- In BM/TC combined configuration mode, the TC
function is performed by the GMPS or GEPS. In BM/TC combined
configuration mode, the TC function is performed by the GDPUX
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page24
Type of PCU
There are two types of PCU: built-in PCU and external
PCU
The external PCU is an independent network element that
provides PS service processing functions. It communicates
with the BSC over the Pb interface, and communicates with the
SGSN over the Gb interface
The built-in PCU is the GDPUP, which provides PS service
processing functions. The GDPUP is configured in the
GMPS/GEPS
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page25
Example
GMPS/GEPS GTCSBTS
CBC
MSC
BM TC
Abis Ater A
Cb
LMT
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page26
Subrack——GMPS
The GMPS processes the basic services and performs the
O&M function. In addition, the GMPS provides clock for the
system
One BSC6000 is configured with one GMPS in the GBCR.
The fully configured GMPS can hold 512 TRXs
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page27
Subrack——GMPS(BM/TC separated)
When non-IP boards are used on the A interface, the fully
configured GMPS is shown in the below
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Backplane
Frontboard
Rearboard
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Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page28
GTCS
The GTCS implements the transcoding, rate adaptation,
and sub-multiplexing functions
The BSC6000 is configured with 1–2 GTCSs in the GBCR
or the GBSR
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page29
GTCS-E1 Transmission
When the BSC6000 uses E1 transmissions on the A
interface, a GTCS provides a maximum of 3,840 speech
channels
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Rear
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Front
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Backplane
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Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page30
GTCS-Optical Transmission
When the BSC6000 uses STM-1 transmissions on the A
interface, a GTCS provides a maximum of 7,680 speech
channels
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Rear
board
Front
board
Backplane
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Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page31
Subrack——GMPS(BM/TC combined)
=+
BM/TC seperated BM/TC combined
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page32
Subrack——GMPS(BM/TC combined)
When non-IP boards are used on the A interface, the fully
configured GMPS is shown in the below
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Backplane
Front
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Rear
board
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Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page33
Subrack——GEPS
The GEPS processes services for the BSC. The BSC6000
is configured with 0–2 GEPSs in the GBCR or the GBSR
Compared with the GMPS, the GEPS is not configured with
the GGCU and GOMU
A fully configured GEPS can support 768 TRXs
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page34
Subrack——GEPS(BM/TC separated)
1300 01 02 03 07060504 08 09 10 1211
GXP
U
M
GXP
U
M
GSC
U
GSC
U
GTNU
GTNU
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DPU
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DPU
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EIU
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EIU
B
Rearboard
Backplane
Front
board
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Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page35
Subrack——GEPS(BM/TC combined)
When non-IP boards are used on the A interface, full GEPS
configuration is shown in the below
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Rearboard
Backplane
Front
board
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page36
Board- GGCU Configured in slots 12 and 13 in the GMPS (active/standby mode)
provides synchronous timing signals for the system
Generates and retains the synchronous clock signals
Keeps the consistency of synchronization information output from
the active and standby GGCUs
Port Function Matching
Connector
CLKOUT 0-9 Output 8 kHz clock signals to the GSCU RJ45
COM 0-1 Reserved RJ45
TESTOUT Reserved
SMB male connector
TESTIN Reserved
CLKIN 0-1 Synchronization clock signal input port, used to input one route of external 2.048 MHz signal and 2.048 Mbit/s code stream
signals
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Board- GTNU
Configured in slots 4 and slot 5 of the GMPS/GEPS/GTCS
(active/standby mode)
Performs the TDM (Time Division Multiplexing) switching
function
Provides 128 K *128 K TDM switching
Allocates TDM network resources, establishes and releases
radio links
Port Function Matching
connector
TDM 0-5TDM high-speed serial port, used to connect
the GTNUs between subracks DB14
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Board- GSCU Configured slots 6 and 7 of the GMPS/GEPS/GTCS (active/standby
mode)
Performs maintenance management
Provides a GE platform for the subrack
Provides clock information for the other boards in the same subrack
except the GGCU in the GMPS
Port Function Matching
Connector
10/100/1000
BASE-T 0–9
10/100/1000 Mbit/s Ethernet ports, used to connect
subracks
RJ45 10/100/1000
BASE-T 10–11
10/100/1000 Mbit/s Ethernet ports, used to connect
GBAM/GOMU (Only the main subrack is connected with
the GBAM/GOMU)
COM Debugging port
CLKIN Clock source port, used to receive the 8 kHz clock signals
from the panel of the GGCU
TESTOUT Clock test signal port, used to output clock test signals SMB male
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page39
Board- GXPUM
Configured in slots 0 and 1 of the
GMPS/GEPS
(active/standby mode).
System information management
Channel assignment
BTS common service management
Performs the short message cell broadcast
Port Function Matching
connector
10/100/1000
BASEs- T0-3GE/FE Ethernet port, reserved RJ45
Paging control
Voice call control
Packet service control
Handover
Power control
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page40
Board- GXPUT
The GXPUT is the transmission processing unit in the
BSC6000. The active GXPUT and standby GXPUT are
inserted in slots 2 and slot 3 in the GMPS or GEPS.
The GXPUT perform LAPD links processing function of
the system
Port Function Matching connector
10/100/1000 BASEs T0-3 GE/FE Ethernet port, reserved RJ45
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page41
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15
Backplane
Board CPU Number Function
GXPUM
CPU0CPU0,algorithm,resource management,PS signal
processing
CPU3 CPUP,PCU maintenance、cell data broadcast
CPU1
CPU2
GXPUT CPU0/1/2/3
CPUX ,CS service processing
CPU-XPUa
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page42
Board- GDPUC/X
Indicator Color Status Meaning
RUN Green
On for one second and off for
one secondThe board is working normally
On for 0.125 second and off
for 0.125 secondThe board is in loading state
On for 2 seconds and off for 2
secondsThe board is testing
On There is power supply but the
board is faulty
Off There is no power supply or the
board is faulty
ALM RedOff No alarm
On (or flashing) The board has a fault alarm
ACT GreenOn The board is in active state
Off The board is in standby state
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page43
Board- GDPUP
Configured in slot 8 to slot 11 of GMPS, slot 8
to slot 13 of the GEPS (N+1 redundant backup
mode)
Performs the packet data service processing
function
GDPUP provide 1024 PDCH channel
processing(MCS-9)
Automatically detects packet data faults
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page44
Board——GOMU
LED Color Status Description
RUN Green On for 1s and off for 1s The board is operating
On for 0.125s and off for
0.125s
The board is loading software
On for 2s and off for 2s The board is being tested
Steady on There is power supply but the board is faulty
Steady off There is no power supply or the board is faulty
ALM Red On (or flashing) There is a fault related to the running board
Steady off There is no alarm
ACT Green Steady on The board works in active mode
Steady off The board works in standby mode
OFFLINE Blue On The board can be removed
Off The board cannot be removed
On for 0.125s and off for
0.125s
The status of the board is switching
HD Green Flashing The hard disk is performing read and write
operations
Steady off The hard disk is not performing read and write
operations
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page45
Board- GEIU/ GOIU GEIU/GOIU works in active/standby mode and can be
categorized into the following types :
The GEIUB/GOIUB is the Interface Unit for the Abis interface
The GEIUP/GOIUP is the Interface Unit for the Pb interface
The GEIUT/GOIUT is the Interface Unit for the Ater interface
The GEIUA/GOIUA is the Interface Unit for the A interface
GEIU
PARC
RUNALMACT
TE
ST
OU
T2M
02M
1
GOIU
PARC
RUNALMACT
TE
ST
OU
T2M
02M
1
LOS
TX
RX
E1/T1(0~7)
E1/T1(16~23)
E1/T1(24~31)
E1/T1(8~15)
Interface Function Matching
connector
E1/ T1
0-31
The E1/ T1 port,0 ~31 of the used to transmit
and receive E1/ T1 signals on routes 0-31
DB44
2M 0-1
2.048 MHz clock source output port, used to
output the extracted line clock as the system
clock source
SMB male
connector
TESTOUT 2.048 MHz clock output port, used to output
the testing clock of the system
SMB male
connector
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page46
Board- GEIU/ GOIU The GEIU/GOIU has the following functions:
Processes the SS7 MTP2 protocols (performed by GEIUT/GOIUT)
Processes the Link Access Procedure on the D channel (LAPD)
protocols (performed by GEIUP/GOIUP or GEIUB/GOIUB )
Provides maintenance links when GTCS subracks are configured
at the MSC side
Performs inter-board Tributary Protect Switching (TPS)
GEIU
PARC
RUNALMACT
TE
ST
OU
T2M
02M
1
GOIU
PARC
RUNALMACT
TE
ST
OU
T2M
02M
1
LOS
TX
RX
E1/T1(0~7)
E1/T1(16~23)
E1/T1(24~31)
E1/T1(8~15)
Interface Function Matching
connector
RX Transmitting optical port 155.52 Mbit/s LC
connectorTX Receiving optical port 155.52 Mbit/s
2M 0-1
2.048 MHz clock source output port, used to
output the extracted line clock as the system
clock source
SMB male
connector
TESTOUT 2.048 MHz clock output port, used to output the
testing clock of the system
SMB male
connector
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page47
Board- GEIU
DIP switch
Bit Description 75 Ω 120 Ω
S1 1 0 -7 of the Used to select the impedance on E1/ T1 links 7
ON OFF
2 8 -15 of the Used to select the impedance on E1/ T1 links 15
ON OFF
3 16 -23 of the Used to select the impedance on E1/ T1 links 23
ON OFF
4 24 -31 of the Used to select the impedance on E1/ T1 links 31
ON OFF
5-8 Unused ON OFF
S3 1-8 0 -7 of the Used to set the protection grounding of the transmitting end of E1/ T1 links 7
ON OFF
S4 1-8 8 -15 of the Used to set the protection grounding of the transmitting end of E1/ T1 links 15
ON OFF
S5 1-8 16 -23 of the Used to set the protection grounding of the transmitting end of E1/ T1 links 23
ON OFF
S6 1-8 24 -31 of the Used to set the protection grounding of the transmitting end of E1/ T1 links 31
ON OFF
There are DIP switches on GEIU, the default setting is to support 75Ω
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page48
Contents
1. System Description
2. Hardware Structure
3. System Logical Structure
4. System Signal Flow
5. Typical Configuration
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page49
Contents
3. System Logical Structure
3.1 TDM Switching Subsystem
3.2 GE Switching Subsystem
3.3 Service Processing Subsystem
3.4 Service Control Subsystem
3.5 Interface and Signaling Processing Subsystem
3.6 Clock Subsystem
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page51
TDM Switching Subsystem
The Time Division Multiplexing (TDM) switching subsystem
provides circuit switched domain (CS) switching for the system
The TDM switching subsystem consists of the GTNU, GDPUX,
interface boards, backplane in the subrack, and interconnected
cables between subracks.
Logical Unit Physical entity
TDM access bearer unit Interface board
TDM switching unit GTNU
TDM processing bearer unit GDPUX
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TDM Access Bearer Unit
The TDM access bearer unit provides TDM bearers for the services on
the A, Abis and Ater interface. Each board has the same hardware
structure that contains backplane and sub board. By loading software, the
functions of A, Abis, Ater, and Pb interface can be enabled
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page53
TDM Switching Unit
Intra-Subrack TDM Switching
GTNU (active) GTNU (standby)
Board Board Board………
Connection between a board and the active GTNU through
a backplane TDM path
Connection between a board and the standby GTNU
through a backplane TDM path
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page54
TDM Switching Unit
Inter-Subrack TDM switching
Inter-subrack TDM switching is carried out through mesh
interconnections
Subrack 1
Subrack 2
Subrack 4
Subrack 3
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page55
GTNU Crossover Ethernet Cable
Pin12
W1 W3
W2 W4
1
B
B
X4
X3X1
X2
A
A
Pin14
Pin1 Pin14
3
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page56
Inter-Subrack Interconnections
The right figure
shows the
interconnections of
GTNU crossover
cables when four
service subracks
are configured
GEPS 1#
GMPS 0#GTNU GTNU
GTNU GTNU
GEPS 2#GTNU GTNU
GEPS 3#GTNU GTNU
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page57
GE Switching Subsystem
The Gigabit Ethernet (GE) switching subsystem performs GE switching of
signaling and O&M interface, packet message switching
The GSCU performs operation and maintenance of its subrack and
provides GE switching for the other boards in the same subrack
GSCU (active) GSCU (standby)
Board Board Board………
Intra-Subrack Connection
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page58
GE Switching Unit
Inter-subrack GE switching: star interconnection through
crossover networks
GEPS
GEPS GMPS
GEPS
GTCS
GTCS
GTCS
GTCS
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page59
LMT
M2000
LanSwitch
GBAM/
GOMU
GMPS/GSCU
GE 0
GE 1
GE 2
GE 3
GE 4
GE 5
GE 6
GE 9
GE 7
GE 8
GE 10
GE 11
FE
GE TRUNK1
GE TRUNK3
GE TRUNK4
GE TRUNK6
GE TRUNK5
GE TRUNK4
CPU FE
GE 0
GE 1
GE 0
GE 1
GE 0
GE 1
1#GEPSGE TRUNK2
GE Switching Interconnection
GE 0
GE 1
2#GEPS
3#GEPS
GTCS Centre
Cross LAN cables
GSCU0
GSCU0 GSCU1
GSCU1
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page60
Service Processing Subsystem
The hardware entity of the service
processing subsystem is the
GDPUX board and GDPUP board
The number of configured GDPUPs
and the number of configured
GDPUXs depend on the traffic
volume of CS services and PS
services
Works in resource pool mode
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page61
CS Service Processing Subsystem
The GDPUX processes CS services. In different
configuration modes of the BSC subracks, the GDPUX
performs different functions:
In BM/TC separated configuration mode, the GDPUX configured in
the GMPS/GEPS performs IP packet-TRAU conversion and
forwarding; the GDPUX configured in the GTCS performs voice
coding/decoding and rate matching
In BM/TC combined configuration mode, the GDPUX performs IP
packet-TRAU conversion, voice coding/decoding, and rate matching
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page62
CS Service Processing Subsystem
The following takes the transmission of CS traffic signals
from the BSC to the MGW as an example. When IP
transmission is used on both the Abis interface and the A
interface, the CS DSP module processes traffic signals as
follows:
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page63
PS Service Processing Subsystem
The GDPUP processes PS services
When the HDLC transmission or IP transmission is
used on the Abis interface, the external PCU cannot be
used. In other words, the BSC must be configured with
the GDPUP to process PS services
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page64
PS Service Processing Subsystem
The following takes the transmission of PS signals from the
BSC to the SGSN as an example. When IP transmission is
used on the Abis interface and on the Gb interface, the
service processing procedure of the PS DSP module is as
follows:
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page65
Service Control Subsystem
The components of the BSC service control subsystem are
as follows:
GXPUM and GXPUT configured in the GMPS/GEPS
GBAM/GOMU
GSCU configured in the GTCS
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page66
Interface Processing Subsystem
Physically the BSC interface processing subsystem consists of the
interface boards and the GXPUM.
Logically, the BSC interface processing subsystem consists of the
following units: Abis interface processing unit, A interface processing unit,
Ater interface processing unit, Pb interface processing unit, Gb interface
processing unit, and Cb interface processing unit.
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page67
Interface Processing Subsystem
Traffic Processing
GEIUB/GOIUB supports 256 TRXs
GEIUTsupports 3840 speech channels
GOIUT supports 7168 speech channels
GEIUP/GOIUP supports 3840 16Kbps PCICs
GEIUA supports 960 speech channels
GOIUA supports 1920 speech channels
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page68
Clock Subsystem
The BSC clock subsystem consists of the GGCU and the
clock processing units in each subrack.
The clock subsystem provides working clock for the BSC
and the reference clock for the BTS.
The BSC can use two clock sources:
BITS clock and line clock
Each clock source either has one backup source or does not
have any backup
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page69
BSC Clock Synchronization
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page70
BSC Clock Synchronization (TC)
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page71
Clock Synchronization Interconnection
GMPS
GGCUGGCU
GEPSGSCU GSCU
Y-shaped
cable
……
CLKIN CLKIN
GEPSGSCU GSCU
CLKIN CLKIN
……
11
2
1
8
1
8
1
8
W2
W3
X2
X3
W1X1
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page72
Contents
1. System Description
2. Hardware Structure
3. System Logical Structure
4. System Signal Flow
5. Typical Configuration
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page73
Contents
4. System Signal Flow
4.1 BSC CS Signal Flow
4.2 BSC PS Signal Flow
4.3 BSC Signaling Flow
4.4 BSC OM Signal Flow
4.5 BSC Alarm Channel
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page74
CS Service Signal Flow (BM/TC separated)
Ater
A
Abis
BTSMS
MSC
G
E
I
U
B
G
T
N
U
G
E
I
U
T
GMPS/GEPS
G
E
I
U
T
G
T
N
U
G
E
I
U
A
GTCS
G
D
P
U
X
Abis over TDM+A over TDM
Front board E1/T1 cable
TDM switching on
the backplane Rear board
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page75
CS Service Signal Flow (BM/TC combined)
Abis over TDM+A over TDM
A
Abis
BTSMS
MSC
G
E
I
U
B
GMPS/GEPS
G
T
N
U
G
E
I
U
A
G
D
P
U
X
A Board is GEIUA/GOIUA
Abis Board is GEIUB/GOIUB
Backplane GE Switching
Backplane TDM Switching
E1/T1 cableFront Board
Rear Board
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page76
Packet Service Signal Flow
(Built-in PCU,BM/TC combined) Abis Over TDM
GbAbis
BTSMS
G
E
I
U
B
G
T
N
U
G
E
P
U
G
GMPS/GEPS
SGSN
G
S
C
U
G
D
P
U
P
Gb Board is GFGUG/GEPUG
Backplane GE Switching
Backplane TDM Switching
E1/T1 cableFront Board
Rear Board
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page77
Packet Service Signal Flow
(external PCU) When Abis interface is over HDLC/IP, BSC6000 doesn’t
support external PCU
Abis Over TDM
Pb GbAbis
BTSMS
PCU
G
E
I
U
B
G
T
N
U
G
E
I
U
P
GMPS/GEPS
SGSN
Backplane GE Switching
Backplane TDM Switching
E1/T1 cableFront Board
Rear Board
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page78
Abis Interface Signal (BM/TC combined)
Abis over TDM
Abis
BTSMS
G
S
C
U
GMPS/GEPS
G
X
P
U
M
Front board E1/T1 cable
TDM switching on
the backplane Rear board
G
E
I
U
B
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page79
SS7 on the A Interface (BM/TC
separated A over TDM
The signals are processed through the MTP2, and
then sent to the GXPUM in the mode of internal
signaling flow
Ater
AMSC
G
S
C
U
G
E
I
U
T
GMPS/GEPS
G
E
I
U
T
G
T
N
U
G
E
I
U
A
GTCS
G
X
P
U
M
Front board E1/T1 cable
TDM switching on
the backplane Rear board
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page80
SS7 Signal Flow (BM/TC combined )
A over TDMThrough the processing of MTP2 model, it
will be transmitted to GXPUM as intra-signal;
A MSC
G
S
C
U
GMPS/GEPS
G
E
I
U
A
G
X
P
U
M
Backplane GE Switching
Backplane TDM Switching
E1/T1 cableFront Board
Rear Board
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page81
Gb Signal Flow
Gb
G
S
C
U
G
E
P
U
G
GMPS/GEPS
SGSN
G
X
P
U
M
Gb board should be GFGUG/GEPUG
Backplane GE Switching
Backplane TDM Switching
E1/T1 cableFront Board
Rear Board
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page82
O&M Flow (Local GTCS,BM/TC
separated)
G
S
C
U
GE on the backplane
Inter-subrack Cable
GMPS
Se
rvic
e b
oa
rdGEPS GTCS
G
S
C
U
G
S
C
U
Se
rvic
e b
oa
rd
Se
rvic
e b
oa
rd
Main GTCS
GSCU
Se
rvic
e b
oa
rd
G
O
M
U
L
M
T
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page83
O&M Flow(Remote GTCS,BM/TC
separated)
GEPS GTCS
Main GTCSGMPS
EIUT
G
O
M
U
G
S
C
U
E
I
U
T
GSCU
G
S
C
U
G
S
C
U
GE on the
backplane
HDLC
Inter-subrack Cable
Se
rvic
e b
oa
rd
Se
rvic
e b
oa
rdS
erv
ice
bo
ard
Se
rvic
e b
oa
rd
L
M
T
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page84
Operation Maintenance Flow
(BM/TC combined)
G
S
C
U
GMPS
G
S
C
U
L
M
T
Service
Board
GEPS
O
M
U
Hardware is
GBAM/GOMU
Service
Board
Backplane GE Switching
Backplane TDM Switching
E1/T1 cable
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page85
Connection of Alarm Box
Connection scheme
Alarm
management
module
GOMUAlarm box
Convert
Management
System
LMT
Serial Cable
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page86
Report of Alarm from Local Subrack
GMPS
GSCUGOMU
LMT
ConvertAlarm box
GEPS
GSCU
Service
board
Service
board
Generate/Shield
AlarmsReport Alarms
Send Alarms
&Record logs
Output Alarms &Drive
Alarm box
Generate Sounds&Lights
BTS
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page87
Report of Alarm from Remote Subrack
GMPS
GEIUT
GOMULMT
ConvertAlarm box
GTCS
GEIUT
Service
board
Service
board
GSCU
GSCU
HDLCLink
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page88
Contents
1. System Description
2. Hardware Structure
3. System Logical Structure
4. System Signal Flow
5. Typical Configuration
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page89
Hardware configuration Principle
Service processing boards
Single GDPUX/GDPUC supplies 960 voice circuits coding/decoding
(960(FR) at most), 960(HR) at most), GDPUX/ GDPUC work as
resource pool in subrack
DPUX supports 3740 voice circuits frame conversion or transmission
between TRAU/IP/HDLC and TRAU
Single GDPUP supplies 1024 MCS-9 PDCH channel of processing
packet service, supports 1024 cells at most, GDPUP is resource pool
of whole system and could be inserted in rear slots
Number of GDPUP+GDPUX+GDPUC couldn’t be more than 10
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page90
Hardware configuration Principle
GXPUM/GXPUT
GXPUM must be inserted in 0&1 slots of GMPS/GEPS fixedly;
GXPUT is inserted in 2&3 slots of GMPS/GEPS by requirement, when
the TRX of current subrack is less than 256, GXPUT may not be
configured, if needs, it’s certainly
Interface Specification
Abis: GEIUB/GOIUB support 256TRX(HR)at most, GEHUB
GFGUB/GOGUB also support 384TRX(HR)at most
A: GOIUA/GEIUA are configured 5 groups per subrack at most, if A
interface uses optical transport, single subrack could access 9600 CIC
at most
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page91
Typical Configuration — 512TRX
(BM/TC separated) Built-in PCU
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page92
Typical Configuration — 1280TRX
(BM/TC separated) 1GMPS+1GEPS+2GTCS, built-in PCU
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page93
Typical Configuration — 2048TRX
(BM/TC separated) External PCU
Built-in GOMU
GOIUA is the A interface
board
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page94
Typical Configuration — 2048TRX
(BM/TC separated) Built-in PCU
Built-in GOMU
GOIUA is the A
interface board
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page95
Typical Configuration — 512TRX
(BM/TC combined) built-in PCU,A interface uses
STM-1 as transport model,
Abis interface uses E1/T1 as
transport model, supports
512TRX at most.
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page96
Typical Configuration — 2048TRX
(BM/TC combined)
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page97
Typical Configuration —
2048TRX (BM/TC combined)
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page98
Scene One
TC/BM combination or separation
=+
BM/TC
separatedBM/TC
combined
How to choose TC/BM
combination or
separation?
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page99
Scene Two
How to choose built-in PCU?
What time we will
choose built-in
PCU?
14 15 16 17 18 19 20 21 22 23 24 25 26 27
G
O
I
U
A
G
O
I
U
A
G
O
I
U
A
G
O
I
U
A
G
E
P
U
G
G
E
P
U
G
G
E
I
U
B
G
E
I
U
B
G
E
I
U
B
G
E
I
U
B
G
X
P
U
M
G
X
P
U
M
G
X
P
U
T
G
X
P
U
T
G
T
N
U
G
T
N
U
G
S
C
U
G
S
C
U
G
D
P
U
P
G
D
P
U
X
G
D
P
U
X
G
D
P
U
X
G
G
C
U
G
G
C
U
0 1 2 3 4 5 6 7 8 9 10 11 12 13
GOMU GOMU
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved. Page100
Summary
Introduce features and functions of BSC6000
Describe components and functions of racks, subracks and
boards in BSC6000
Describe functions of logical structure and cable
connections in every logical part
List configuration principles and typical configurations