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www.huawei.com
BSC6000 Hardware Structure
Page2
Contents
1. System Description
2. Hardware Structure
3. System Logical Structure
4. System Signal Flow
5. Network topology
6. Typical Configuration
Page3
Contents
1. System Description
2. Hardware Structure
3. System Logical Structure
4. System Signal Flow
5. Network topology
6. Typical Configuration
Page4
Location of the BSC6000
The HUAWEI BSC6000 is a new generation GSM BSC
product after M900/M1800 BSC
SGSN
MSC
GGSN
.
HLR
Abis
BSC6000
MS BTS
MSBTS
MSBTS
UmPDN
AGs
Gb
Page5
BSC6000 Version Evolution
V9R1C01V9R1C03
V9R8C01
V9R3C001
R1 R3 R8
Page6
Features of the BSC6000 System 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 Maximum number of cabinets
1 cabinet ( BM/TC combined ) 2 cabinet ( BM/TC separated )
Page7
Features of the BSC6000 System Flexible configuration
Multiple networking modes Based on E1/T1 or STM-1 networking, the BSC6000 and the BTSs can use the star, chain, and tre
e networking modes. Based on IP networking, the BSC6000 supports HDLC-based Hub BTS networking.
Service-oriented hardware configuration The configuration for the Circuit Switched domain (CS) service and Packet Switched domain (P
S) service is flexible. The system can be configured according to different requirements on voice and data services in different phases of network construction
Multiple clock sources The selection of the synchronization clock is flexible. The clock sources can be obtained from:
– Building Integrated Timing Supply System (BITS)– A interface
Local oscillator, which keeps running stably for 48 hours
Page8
Features of the BSC6000 System Advanced management algorithm for radio resource
Power Control The BSC6000 adopts the Huawei-patented power control algorithm. This algorithm l
owers the average transmit power of the BTS and MSs while keeps the transmission quality higher than the specified threshold. This can reduce the interference to other channels, and save the power consumption of MSs
Handover The BSC6000 adopts the Huawei-patented handover algorithm. This algorithm can h
andle the handovers under any radio environment. It can effectively improve the network QoS
Radio Resource Allocation The BSC6000 realizes flexible radio resource allocation. According to the QoS require
ment and the load of the current cell, the BSC6000 can allocate a full rate TCH or a half rate TCH for a service request. This improves the utilization of the radio channel bandwidth, and meets the communication requirements
Page9
Features of the BSC6000 System Smooth capacity expansion and upgrade
Smooth capacity expansion
Online capacity expansion, online patching
Convenient Operation & maintenance
Friendly GUI
Remote maintenance
Online Help
Page10
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 Abis transmission optimization, Hub BTS over HDLC Gb over IP
Page11
Contents
1. System Description
2. Hardware Structure
3. System Logical Structure
4. System Signal Flow
5. Network topology
6. Typical Configuration
Page12
Contents
2. Hardware Structure
2.1 Rack
2.2 Subrack
2.3 Board
Page13
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
Page14
GBCR
The GBCR performs service processing and O&M functions. It consists of three service subracks
GBCR must be configured with GMPS (GSM main processing subrack)
GMPS
Air defencesubrack
Subrack
Cabling subrack
Power distribution
box
Page15
GBSR GBSR (GSM BSC Service Processi
ng 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
Page16
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
Page17
Power Distribution Box Checks two channels of - 48 V input voltage Detects one route of external temperature sensor; detects one ro
ute 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
Page18
Subrack The width of subrack is 19 inch
es 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
Page19
Subrack
GMPS/GEPSGMPS/GEPS GTCSGTCSBTSBTS
CBCCBC
MSCMSC
BMBM TCTC
AbisAbis AterAter AA
CbCb
LMTLMT
Page20
Abbreviation
Abbreviation Full Name
GEPS GSM Extended Processing SubrackGMPS GSM Main Processing SubrackGTCS GSM TransCoder SubrackLMT Local Maintenance Terminal
Page21
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
Page22
Subrack——GMPS(BM/TC combined) When non-IP boards are used on the A interface, the fully
configured GMPS is shown in the below
1300 01 02 03 07060504 08 09 10 1211
GXPUM
GXPUM
GSCU
GSCU
GTNU
GTNU
2714 15 16 17 21201918 22 23 24 2625
GGCU
GGCU
GDPUP
GEIUB
GOMU
GX
P
UT
GX
P
UT
GDPUP
GDPUX
GOIUA
GOIUA
GOIUA
GOIUA
GEPUG
GEPUG
GDPUX
GEIUB
GEIUB
GEIUB
Backplane
Frontboard
Rearboard
GOMU
Page23
Subrack——GMPS(BM/TC combined)
=+
BM/TC seperated BM/TC combined
Page24
Subrack——GMPS(BM/TC seperated) When non-IP boards are used on the A interface, the fully
configured GMPS is shown in the below
1300 01 02 03 07060504 08 09 10 1211
GXPUM
GXPUM
GSCU
GSCU
GTNU
GTNU
2714 15 16 17 21201918 22 23 24 2625
GGCU
GGCU
GDPUP
GEIUB
GOMU
GX
PUT
GX
PUT
GDPUP
GEIUB
GEIUB
GEIUB
Backplane
Frontboard
Rearboard
GOMU
GEPUG
GEPUG
Page25
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 wit
h the GGCU and GOMU. A fully configured GEPS can support 768 TRXs
Page26
Subrack——GEPS(BM/TC combined) When non-IP boards are used on the A interface, full
GEPS configuration is shown in the below
1300 01 02 03 07060504 08 09 10 1211
GXPUM
GXPUM
GSCU
GSCU
GTNU
GTNU
2714 15 16 17 21201918 22 23 24 2625
GDPUP
GXPUT
GXPUT
GDPUP
GDPUX
GOIUA
GOIUA
GOIUA
GOIUA
GDPUP
GOIUA
GOIUA
GEIUB
GEIUB
GDPUX
GDPUX
GEIUB
GEIUB
GEIUB
GEIUB
GDPUX
GDPUX
Rearboard
Backplane
Frontboard
Page27
Subrack——GEPS(BM/TC seperated)
1300 01 02 03 07060504 08 09 10 1211
GXPUM
GXPUM
GSCU
GSCU
GTNU
GTNU
2714 15 16 17 21201918 22 23 24 2625
GDPUP
GXPUT
GXPUT
GDPUP
GDPUP
GEIUB
GEIUB
GEIUB
GEIUB
GEIUB
GEIUB
Rearboard
Backplane
Frontboard
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
Page29
GTCS-E1 Transmission
When the BSC6000 uses E1 transmissions on the A
interface, a GTCS provides a maximum of 3,840
speech channels
1300 01 02 03 07060504 08 09 10 1211
GDPUC
GSCU
GSCU
GTNU
GTNU
2714 15 16 17 21201918 22 23 24 2625
GEIUT
GEIUT
GEIUA
GEIUA
GEIUA
GEIUA
GEIUA
GEIUA
Rearboard
Frontboard
Backplane
GEIUA
GEIUA
GDPUC
GDPUC
GDPUC
GDPUC
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
1300 01 02 03 07060504 08 09 10 1211
GDPUC
GSCU
GSCU
GTNU
GTNU
2714 15 16 17 21201918 22 23 24 2625
GEIUT
GEIUT
GOIUA
GOIUA
GOIUA
GOIUA
GOIUA
GOIUA
Rearboard
Frontboard
Backplane
GOIUA
GOIUA
GDPUC
GDPUC
GDPUC
GEIUT
GEIUT
GDPUC
GDPUC
GDPUC
GDPUC
GDPUC
Page31
Abbreviation
Abbreviation Full Name
GGCU GSM General Clock Unit
GSCU GSM Switching and Control Unit
GTNU GSM TDM switching Network Unit
GXPUM GSM eXtensible Processing Unit for Main service
GXPUT GSM eXtensible Processing Unit for Transmission
GEIUB GSM E1/T1 Interface Unit for Abis
GEIUP GSM E1/T1 Interface Unit for Pb
GEIUT GSM E1/T1 Interface Unit for aTer
GEIUA GSM E1/T1 Interface Unit for A
GOIUB GSM Optic Interface Unit for Abis
GOIUP GSM Optic Interface Unit for Pb
GOIUT GSM Optic Interface Unit for aTer
GOIUA GSM Optic Interface Unit for A
Page32
Abbreviation
Abbreviation Full Name
GOMU GSM Operation & Maintenance Unit
GDPUC GSM Data Processing Unit for CS service
GDPUP GSM Data Processing Unit for PS service
GDPUX GSM Data Processing Unit for eXtensible service
GFGUA GSM Fast ethernet and Gigabit ethernet Unit for A
GFGUB GSM Fast ethernet and Gigabit ethernet Unit for Abis
GFGUG GSM Fast ethernet and Gigabit ethernet Unit for Gb
GOGUA GSM Optic Gigabit ethernet Unit for A
GOGUB GSM Optic Gigabit ethernet Unit for Abis
GEHUB GSM E1/T1 High level Data Link Control Unit for Abis
GEPUG GSM E1/T1 Packet Unit for Gb
Page33
Board- GGCU Configured in slots 12 and 13 in the GMPS (active/standby mode) provides synchronous timing signals for the system Generates synchronous clock signals Keeps the consistency of synchronization information output fro
m 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 strea
m signals
Page34
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 connec
t the GTNUs between subracks DB14
Page35
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 subrac
k 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
Page36
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
Page37
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
T0-3GE/FE Ethernet port, reserved RJ45
Page38
Board- GDPUC/X
Indicator Color Status Meaning
RUN Green
On for one second and off for one second
The board is working normally
On for 0.125 second and off for 0.125 second
The board is in loading state
On for 2 seconds and off for 2 seconds
The 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
Page39
Board- GDPUC/GDPUX Configured in slot 0 to slot 3, slot 8 to slot 13 of the
GTCS (N+1 redundant backup mode)
Performs the voice and data service processing
function
Encodes and decodes speech services
Performs data service rate adaptation
Performs Tandem Free Operation (TFO)
Performs voice enhancement function
Automatically detects voice faults
GDPUC/GDPUX provide 1320 voice channel processing
GDPUX provide 3740 IP/HDLC packet channel
processing
Page40
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 functiona
GDPUP provide 1024 PDCH channel processing(MCS-9)
Automatically detects packet data faults
Page41
Board——GOMU As the OM center of the BSC, The GOMUs are installed in slots 20–23
in the GMPS and work in active/standby mode. The GOMU features high computation speed and outstanding data processing capability
The GOMU has the following functions: Provides configuration management, performance managemen
t, fault management, security management, and loading management for the BSC
Interfaces to the LMT/M2000 on behalf of the BSC(1) Screw (2) Leaf spring (3) Wrench
(4) RUN LED (5) ALM LED (6) ACT LED
(7) Reset button
(8) Shutdown button
(9) USB port
(10) ETH0 (Ethernet port)
(11) ETH1 (Ethernet port)
(12) ETH2 (Ethernet port)
(13) COM port (14) VGA port (15) HD LED
(16) OFFLINE LED
(17) Hard disk (18) Screw for fix the hard disk
Page42
Board——GOMU IndicatorLED Color Status DescriptionRUN Green On for 1s and off for
1sThe 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 boardSteady off There is no alarm
ACT Green Steady on The board works in active modeSteady off The board works in standby mode
OFFLINE Blue On The board can be removedOff 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
Page43
Board- GEIU/ GOIU GEIU/GOIU works in active/standby mode and can be catego
rized(phan) 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 0-12.048 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
Page44
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) pro
tocols (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 0-12.048 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
Page45
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
Page46
Board- GFGUA/B/G
Port Function Matching Connector
10/100M 10M/100Mbit/s Ethernet ports, used to transmit 10M/100M signal
RJ45
10/100/1000M 10M/100M/1000 Mbit/s Ethernet ports, used to transmit 10M/100M/1000M signal
RJ45
2M0 testing -
2M1 testing -
Page47
Board- GFGUA/B/G
Indicator Color Status Meaning
RUN Green
On for one second and off for one second The board is working normally
On for 0.125 second and off for 0.125 second The board is in loading state
On for 2 seconds and off for 2 seconds The 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
link Green
On The link is connected.
Off The link is broken.
ACT(link) Green
Off No data is being transmitted on the
port.
Flash Data is being transmitted on the port.
Page48
Board- GEPUG/GEHUB
Port FunctionMatching Connector
E1/T1 (0–7)E1/T1 port, used to transmit and receive E1/T1 signals on routes 0–7
DB44 connector
E1/T1 (8–15)E1/T1 port, used to transmit and receive E1/T1 signals on routes 8–15
DB44 connector
E1/T1 (16–23)E1/T1 port, used to transmit and receive E1/T1 signals on routes 16–23
DB44 connector
E1/T1 (24–31)E1/T1 port, used to transmit and receive E1/T1 signals on routes 24–31
DB44 connector
2M0–12.048 MHz clock source output port, used to provide extracted line clock as clock source for the system
SMB male connector
Page49
GOGUA/GOGUB
Port Function Matching Connector
RX/TX Transmitting optical port/Receiving optical port
LC/PC connector
2M0 testing SMB male connector
2M1 testing SMB male connector
Page50
Contents
1. System Description
2. Hardware Structure
3. System Logical Structure
4. System Signal Flow
5. Network topology
6. Typical Configuration
Page51
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
Page52
System Logical Structure
TDM switching subsystem
GE switching subsystem
Clock subsystem
Servicecontrol
subsystem
Serviceprocessingsubsystem
Interfaceand
signalingprocessingsubsystem
/ /E1/T1/STM-1 GE FE to BTS
/ / toSGSNE1/T1/STM-1 GE FE
/ / to MSCE1/T1/STM-1 GE FE
Page53
TDM Switching Subsystem The Time Division Multiplexing (TDM) switching subsystem provides circuit
switched domain (CS) switching for the system Provides TDM bearers for the A, Abis, Ater, and Pb interfaces Performs TDM switching and providing circuit switched domain (CS) switching for the system Provides TDM bearers for the system service processing
Logical Unit Physical entity
TDM access bearer unit Interface board
TDM switching unit GTNU
TDM processing bearer unit
GDPUX
Page54
TDM Access Bearer Unit The TDM access bearer unit provides TDM bearers for the services on t
he 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
Page55
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
Page56
TDM Switching Unit Inter-Subrack TDM switching
Inter-subrack TDM switching is carried out through mesh interconnections
The BSC6000 supports the following mesh interconnections between a maximum of four subracks
Mesh interconnections between the GMPS and three GEPSs Mesh interconnection between four GTCSs
Subrack 1Subrack 1
Subrack 2Subrack 2
Subrack 4Subrack 4
Subrack 3Subrack 3
Page57
Inter-Subrack Interconnections The right figure sh
ows 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
Page58
GTNU Crossover Ethernet Cable
Pin12
W1 W3
W2 W4
1
B
B
X4
X3X1
X2
A
A
Pin14
Pin1 Pin14
3
Page59
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 pr
ovides GE switching for the other boards in the same subrack
GSCU (active) GSCU (standby)
Board Board Board………
Intra-Subrack ConnectionIntra-Subrack Connection
Backplane pathBackplane path
Page60
GE Switching Unit Inter-subrack GE switching: star interconnection through
crossover networks
GEPSGEPS
GEPSGEPS GMPSGMPS
GEPSGEPS
GTCSGTCS
GTCSGTCS
GTCSGTCS
GTCSGTCS
Only in Local Only in Local GTCS mode:GTCS mode:Crossed LAN Crossed LAN
cables between cables between GSCUGSCU
Note: In Remote GTCS mode, loading path is in Ater interface
Page61
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
Page62
Service Processing Subsystem The hardware entity of the service processing
subsystem is the GDPUC/X board Transcoding Rate adaptation
Every board can process 1320
circuits in A interface Works in resource pool mode
Page63
Service Control Subsystem
The hardware entities: The GXPUM board The GXPUT board The GOMU board The GSCU board in the GTCS subrack
Page64
Service Control Subsystem The GXPUM board performs the main service processing of the
BSC6000 Paging control, system information management, channel assign
ment, and BTS common service management voice call control, PS service control, handover, and power control
The GXPUT board performs the cell broadcast function The GOMU server performs BTS O&M management The GSCU board in the GTCS subrack performs the TC resource
pool management
Page65
Interface Processing Subsystem The interface and signaling subsystem provides interf
aces of BSC, BTS, and NSS, which performs signaling processing function of data link layer
Provides A/Abis/Ater interfaces Supports cell broadcast message service processing
Page66
Interface Processing Subsystem
Traffic Processing GEIUB/GOIUB supports 256 TRXs GEIUT/GOIUT supports 3840 speech channels GEIUP/GOIUP supports 3840 16Kbps PCICs GEIUA supports 960 speech channels GOIUA supports 1920 speech channels
Page67
Interface Processing Subsystem
Traffic Processing GFGUB supports 384 TRXs GFGUA supports 6144 speech channels GFGUG supports 128M bps GOGUA supports 6144 speech channels GOGUB supports 384 TRXs GEHUB supports 384 TRXs GEPUG supports 64M bps
Page68
Clock Subsystem Hardware entity is the GSM General Clock Unit (GGCU) Clock sources
Building Integrated Timing Supply System (BITS) 2 MHz clock 2 Mbit/s clock The 2 Mbit/s clock source has higher anti-interference capabilities than the 2 MHz
clock source
Line clock In BM/TC separated configuration mode, the GTCS extracts the line clock signals f
rom the A interface. The GGCU extracts the line clock signals from the Ater interface, and then distributes clock signals to the GMPS/GEPS.
In BM/TC combined configuration mode, the GMPS extracts the line clock signals from the A interface. Then, the clock signals are transmitted to the GGCU through the backplane.
In A over IP configuration mode, the BSC cannot use the line clock.
Page69
Clock Configuration
Configuration for the clock in the GGCU
Without BITS
GGCU extracts the synchronization reference clock from
the interface board of GMPS
Other distribution cables are not required
GGCU chooses the clock reference of backplane
With BITS
GGCU should be equipped with distribution cables
BITS has high priority
Page70
GSCU
Active/standby GGCU
in GMPS
Service
board
Service
board
GMPS
BITS Line Clock
Backplane transmission
Distribution cable transmission
Backplane transmission
Clock System Scheme
GSCU
Service
board
Service
board
GEPS
Backplane transmission
GSCU
Service
board
Service
board
GEPS
Backplane transmission
Y-shaped clock cable
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
Page72
Contents
1. System Description
2. Hardware Structure
3. System Logical Structure
4. System Signal Flow
5. Network topology
6. Typical Configuration
Page73
Contents
4. System Signal Flow
4.1 System Signal Flow
4.2 O&M Signal Flow
4.3 Alarm Channel
Page74
CS Service Signal Flow
Ater
A
Abis
BTSMSMSC
GEIUB
GTNU
GEIUT
GMPS/GEPS
GEIUT
GTNU
GEIUA
GTCS
GDPUX
Abis over TDM+A over TDM
Front board E1/T1 cable
TDM switching on the backplane
Rear board
DemuxDemuxMux-16k/8k/subTSMux-16k/8k/subTS
Demux-64k/TSDemux-64k/TS Code/decode- ARCode/decode- AR
PCM 64kPCM 64k
Page75
CS Service Signal Flow
Abis over HDLC+A over TDM
Page76
PS Service Signal Flow Abis over TDM
GbAbis
BTSMS
GEIUB
GTNU
GEPUG
GMPS/GEPS
SGSN
GSCU
GDPUP
Front board E1/T1 cable
TDM switching on the backplane
Rear board
1-4 SubTS1-4 SubTS Format coversionFormat coversion Process data L1Process data L1
Page77
Page78
PS Service Signal Flow
Abis over HDLC
GbAbis
BTSMS
GMPS/GEPS
SGSN
GSCU
GEPUG
GSCU
GDPUP
GEHUB
Front board E1/T1 cable
TDM switching on the backplane
Rear board
Page79
SS7 on the A Interface The signals are processed through the MTP2, and
then sent to the GXPUM in the mode of internal signaling flow
Ater
AMSC
GSCU
GEIUT
GMPS/GEPS
GEIUT
GTNU
GEIUA
GTCS
GXPUM
Front board E1/T1 cable
TDM switching on the backplane
Rear board
Page80
LAPD on the Abis Interface
Abis
BTSMS
Abis board
GSCU
GMPS/GEPS
GXPUT
GXPUM
GSCU
Front board E1/T1 cable
TDM switching on the backplane
Rear board
Page81
Signaling flow on Gb interface
Gb
GSCU
GEPUG
GMPS/GEPS
SGSN
GXPUM
Front board E1/T1 cable
TDM switching on the backplane
Rear board
Page82
O&M Flow (Local GTCS)
GSCU
GE on the backplane
Inter-subrack Cable
GMPS
Service
board
GEPS GTCS
GSCU
GSCU
Service
board
Service
board
Main GTCS
GSCU
Service
board
GOMU/
L
M
T
Page83
O&M Flow(Remote GTCS)
GEPS GTCS
Main GTCSGMPS
EIUT
GOMU
GSCU
EIUT
GSCU
GSCU
GSCU
GE on the backplane
HDLC
Inter-subrack Cable
Service
board
Service
board
Service
board
Service
board
L
M
T
Page84
Connection of Alarm Box Connection scheme
Alarm management
module
GOMUAlarm box
Convert Management System
LMT
Serial CableSerial Cable
Page85
Report of Alarm from Local Subrack
GMPS
GSCU GOMULMT
ConvertAlarm box
GEPS
GSCU
Service board
Service board
Generate/Generate/Shield Shield AlarmsAlarms
Report Report AlarmsAlarms
Send Send AlarmsAlarms
&Record &Record logslogs
Output Output Alarms Alarms &Drive &Drive
Alarm boxAlarm box
Generate SoundGenerate Sounds&Lightss&Lights
BTS
Page86
Report of Alarm from Remote Subrack
GMPS
GEIUT
GOMULMT
ConvertAlarm box
GTCS
GEIUT
Service board
Service board
GSCU
GSCU
HDLCHDLCLinkLink
Page87
Contents
1. System Description
2. Hardware Structure
3. System Logical Structure
4. System Signal Flow
5. Network topology
6. Typical Configuration
Page88
Abis over TDM Abis over E1/T1
Page89
Abis over TDM Abis over STM-1
Page90
Abis over HDLC
Page91
A interface over TDM
Page92
A interface over STM-1
Page93
Ater interface over TDM
Page94
Gb interface over FR
Page95
Gb interface over IP
Page96
Contents
1. System Description
2. Hardware Structure
3. System Logical Structure
4. System Signal Flow
5. Typical Configuration
Page97
Typical Configuration Capacity of
this
configuration:
256TRX full
rate/256TRX
half rate
Page98
Typical Configuration Capacity of
this
configuration:
512TRX full
rate/512TRX
half rate
Page99
Typical Configuration Capacity of
this
configuration:
768TRX full
rate/768TRX
half rate
Page100
Typical Configuration Capacity of
this
configuration:
1024TRX full
rate/1024TRX
half rate
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