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ZTE Confidential ZXC10-BSC Sub-System 2004.10.3. ZTE Confidential Lesson Objectives: General Study...
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Transcript of ZTE Confidential ZXC10-BSC Sub-System 2004.10.3. ZTE Confidential Lesson Objectives: General Study...
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ZXC10-BSC Sub-System
2004.10.3
ZTE University www.univ.zte.com.cnwww.univ.zte.com.cn ZTE Confidential
Lesson Objectives: General Study HIRS:High-speed Interconnection Routing Subsystem
SVBS:Selector Vocoder Bank Subsystem
PCFS:Packet Control Function Subsystem
CPS:Call Processing Subsystem
CDSUS:Channel Data Service Unit Subsystem
TS:Timing Subsystem
Subsystems of BSC
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General Study• BSC working environment requirement Working temperature: 0°C ~+55°C Working humidity: 15%~93% The density of dust in the equipment room with diameters of over 5μm sh
ould be ≤3*104 granules/m3.
• Power requirement • BSC DC power • 1)Voltage amplitude: The nominal voltage value of the BSC power supplied
by the power equipment in the equipment room is -48V. The permitted variation range is -57V~-40V.
• 2)The noise level index contained in the DC power voltage should satisfy the requirement in the overall technical specifications by the former MPT.
3)DC power should provide over-voltage
• BSC working environment requirement Working temperature: 0°C ~+55°C Working humidity: 15%~93% The density of dust in the equipment room with diameters of over 5μm sh
ould be ≤3*104 granules/m3.
• Power requirement • BSC DC power • 1)Voltage amplitude: The nominal voltage value of the BSC power supplied
by the power equipment in the equipment room is -48V. The permitted variation range is -57V~-40V.
• 2)The noise level index contained in the DC power voltage should satisfy the requirement in the overall technical specifications by the former MPT.
3)DC power should provide over-voltage
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BSC Mechanical Structure--Center Rack
HIRSHIRS
CDSUSCDSUSCPSCPS
TSTS
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BSC Mechanical Structure--Vocoder Rack
SVBSor
PCFS
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Mechanical Features• BSC comprises the central rack and the vocoder rack. • The central rack and the vocoder rack adopts the unified
racks and standard plug-in boxes, which provide different functions due to the use of different plug-in unis.
• External dimensions of the rack (main body) (H*W*D): 2000 mm*810 mm*600 mm
• Outline dimensions of rack (after installation of top shelf and side board) (H×W×D): 2200mm×870mm×600mm
• From top to bottom, each rack includes one distribution plug-in box, 3~5 functional plug-in boxes, one fan plug-in box, and dust-proof shelf. There are three types of functional plug-in boxes.
• BSC comprises the central rack and the vocoder rack. • The central rack and the vocoder rack adopts the unified
racks and standard plug-in boxes, which provide different functions due to the use of different plug-in unis.
• External dimensions of the rack (main body) (H*W*D): 2000 mm*810 mm*600 mm
• Outline dimensions of rack (after installation of top shelf and side board) (H×W×D): 2200mm×870mm×600mm
• From top to bottom, each rack includes one distribution plug-in box, 3~5 functional plug-in boxes, one fan plug-in box, and dust-proof shelf. There are three types of functional plug-in boxes.
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HIRS Subsystem is switching center and packet data exchange platform of BSC.
Functions of HIRS : Packet data switching
Timing distribution , monitor GPS
Software downloading
Operation and maintenance management on the whole BSS
HIRS Subsystem is switching center and packet data exchange platform of BSC.
Functions of HIRS : Packet data switching
Timing distribution , monitor GPS
Software downloading
Operation and maintenance management on the whole BSS
HIRS
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HIRS Shelf StructurePSMB
NIM
NIM
NIM
NIM
NIM
NIM
NIM
NIM
NIM
NCM
NCM
NIM
NIM
NIM
NIM
NIM
NIM
NIM
NIM
NIM
NIM
NIM
PSMB
NCM: Network Control Module
NIM: Network Interface Module
PSMB : Power Supply Module
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Input and Output interface
Operate and maintain interface
HIRS Subsystem
RS422 interface Clock interface
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NCM is the core module in HIRS shelf
When NCM is in slot 11,it must connect with port 6 of NIM in slot 9 via the internal serial bus on backplane.
When NCM is in slot 12,it must connect with port 6 of NIM in slot 14 via the internal serial bus on backplane.
2 NCM working mode: active and standby
NCM is the core module in HIRS shelf
When NCM is in slot 11,it must connect with port 6 of NIM in slot 9 via the internal serial bus on backplane.
When NCM is in slot 12,it must connect with port 6 of NIM in slot 14 via the internal serial bus on backplane.
2 NCM working mode: active and standby
NCM
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Major functions of NCM : Gateway function:data receiving of CO bus and distribution of DIS bus,routing of data frame inside/outside of the local shelf
Distribution of software of respective modules and configuration information;
Fault detection, isolation, report and recovery in HIRS network;
GPS clock distribution;
Serving as the foreground PC of BSM to communicate with the background through 10/100Mbps Ethernet
Major functions of NCM : Gateway function:data receiving of CO bus and distribution of DIS bus,routing of data frame inside/outside of the local shelf
Distribution of software of respective modules and configuration information;
Fault detection, isolation, report and recovery in HIRS network;
GPS clock distribution;
Serving as the foreground PC of BSM to communicate with the background through 10/100Mbps Ethernet
NCM Functions
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NCM Panel Indicator&Interface`Indicator:
RUN:when module normal running,it quick flashALM:OFF indicates no faultACT:Active/Standby State
Interface:TEST:Network interface,for debugging but not connected in operationsRS-232:serial port, for debugging but not connected in operationsRST:Manual resetting on boardsM/S:Manual Switching active/standby mode on the foreground
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Receive/send RS-422 serial data
Receive/send data through DISCO
8 + 1 redundancy
Clock receiving and distributing
Reports module working states to NCM via I2C bus and accepts NCM control
NIM Functions
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NCM
NCM
2 3 4 5 6 7 8 9 10 13 1514 16 17 1918 20 2111 12
0 1 2 3 4 5 6 7 9 11 12 13 14 158
0
12
3
45
6
7
Node address
10
Port
Number
Slot No.
NIM StandbyConfiguration DirectionConfiguration Direction
Network address distribution
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NCM
NCM
2 3 4 5 6 7 8 9 10 13 1514 16 17 1918 20 2111 12
NCM
NCM
2 3 4 5 6 7 8 9 10 13 1514 16 17 1918 20 2111 12
0 1 2 3 4 5 6 7 9 A B C D E F8
Node address
012
3
45
6
7
Port address
Slot No.
CPM Network Address
BSSId = X , SubNetId = 0 , NodeId = 7 , PortId
= 7 ;
NCM Network Address
BSSId = X , SubNetId = 0 , NodeId = 7 , PortId = 6 ;
Network address distribution(Cont.)
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NIM daisy chainNIM :8 working + 1 standby and changeover
N
I
M
0 1 2 3 4 5 6 8 9 10 11 12 13N
C
M N
I
M
7 backup 14 15backup
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NIM Panel IndicatorNIM
RUNALM
ACT
RST
RUN: A green indicator, blinking when the board works normally.
ALM: A red indicator, lighting up or blinking in case of board failure.
ACT: A green indicator, lighting up when the board is in master mode.
RST: Reset button.
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SVBS--Selector/Vocoder Band Subsystem
SVBS is the core part for enabling voice services and supporting SS7 signaling MTP1 and MTP2.
Judge and implement soft handoff: select a path in several soft handoff path by the quality for code type conversion
Code type conversion function: It enables the conversion between 64K PCM codes and variable rate of QCELP codes;
Enables echo cancellation for PCM data on the forward link
Power control
Signaling handle
SVBS is the core part for enabling voice services and supporting SS7 signaling MTP1 and MTP2.
Judge and implement soft handoff: select a path in several soft handoff path by the quality for code type conversion
Code type conversion function: It enables the conversion between 64K PCM codes and variable rate of QCELP codes;
Enables echo cancellation for PCM data on the forward link
Power control
Signaling handle
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SVBS Shelf StructurePSMB
SVM
SVM
SVM
SVM
SVM
SVM
SVM
SVM
SVICM
SVICM
SVM
SVM
SVM
SVM
SVM
SVM
SVM
SVM
PSMB
SVICM: Selector Vocoder Interface Control Module
SVM: Selector Vocoder Module
PSMB : Power Supply Module
SVICM: Selector Vocoder Interface Control Module
SVM: Selector Vocoder Module
PSMB : Power Supply Module
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Input and Output interface
4*E1 interfaces connected with MSC
SVBS Subsystem
Connected with NIM via RS422 port
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SVICM FunctionsS-HIRS:Communicate with HIRS Network
Distribute forward traffic and signaling ( SVMSVICM NIM )Distribute reverse traffic and signaling (SVMSVICM NIM )Distribute signaling interior SVBS ( SVMSVICM )
Receive and Distribute Clock and TOD messageManage and control SVMSignaling handlingCode type conversion between MSC and BSS via DTI
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NIM
SVICMU
gateway
SVCSVM
1SVM
7SVM
8
CODISC_BUS
SVBS
DTI
MSC
时钟
I2C
Clockdistribution
RS422
4*E1
4*HW
Structure of SVICM
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SVICM Panel IndicatorRUN: Running indicator (green), blinking during operation;
ALARM: Alarm indicator (red), lighting up when a software error occurs;
DT0: 1st E1 connection indicator, lighting up to indicate that the E1 link is connects;
DT1: 2nd E1 connection indicator, lighting up to indicate that the E1 link is connects;
DT2: 3rd E1 connection indicator, lighting up to indicate that the E1 link is connects;
DT3: 4th E1 connection indicator, lighting up to indicate that the E1 link is connects;
RST: Reset button.
RUN
ALM
DT0
DT1
DT2
DT3
RST
TEST
RS232
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transcoding between PCM and QCELP
reverse outer-loop power control
soft handoff
handle layer 3 of Abis interface and layer 2 of IS-95 signaling
assign the timeslot
SVM - Selector & Vocoder Module
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A SVM contain 1 SVP and 15 SVEs. SVICM receive traffic data from the RS-422 port of NIM then forward to S
VM,SVP forward to SVE,SVE transcoding to PCM and send through HW,i
n other direction,SVE transcoding PCM to QCELP or EVRC,then send to
SVP,then to SVICM,and then NIM.
Structure of SVM
HW interface
SVE1
SVE2
SVE15
Data Interface
maintenance bus
clock interface
SV
P
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SVM Panel Indicator
RUN: Running indicator (green), blinking during working normally;
ALARM: Alarm indicator (red), lighting up when a software error occurs;
RESET: Reset button.
SVM
ALM
RS232
RST
TEST
RUN
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PCFS-Packet Control Function Subsystem Each BSC can support 10 PCFS subsystems.
Each PCFS subsystem comprises 1 PCFIM board and 8 PCF boards.
Each PCFS subsystem is connected with the PDSN via PCFIM board, and provides a 10M/100M self-adaptive physical Ethernet interface through the PCFIM board.
Each PCFS subsystem can carry 4000 PPP connections (Dormant+Active), and 240 activated PPP connections (total number of active ones).
Each BSC can support 10 PCFS subsystems.
Each PCFS subsystem comprises 1 PCFIM board and 8 PCF boards.
Each PCFS subsystem is connected with the PDSN via PCFIM board, and provides a 10M/100M self-adaptive physical Ethernet interface through the PCFIM board.
Each PCFS subsystem can carry 4000 PPP connections (Dormant+Active), and 240 activated PPP connections (total number of active ones).
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PCFS Functions
To Select a service path with best quality among multiple soft
handover paths for data GRE encapsulation.
Enables adaptation between GRE data packets and RLP data
packets;.
To establish, configure and maintain A8 and A10 links via A9
and A11 interfaces.
To establish PPP link between MS and PDSN to enable packet
data service transmission.
To Select a service path with best quality among multiple soft
handover paths for data GRE encapsulation.
Enables adaptation between GRE data packets and RLP data
packets;.
To establish, configure and maintain A8 and A10 links via A9
and A11 interfaces.
To establish PPP link between MS and PDSN to enable packet
data service transmission.
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PCFS Shelf Structure
PCF
PCFIM
PSMB
PSMB
PCF
PCF
PCF
PCF
PCF
PCF
PCF
PCF
PCF
PCF
PCF
PCF
PCF
PCFIM
PCF
PCF
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
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Input and Output Interface
PCFS provides a 10M/100M fast Ethernet interface to be
connected with PDSN.
PCFS provides a RS422-port to be connected with HIRS
switching network.
PCFS provides a 10M/100M fast Ethernet interface to be
connected with PDSN.
PCFS provides a RS422-port to be connected with HIRS
switching network.
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CPS is a joint point of BSS system’s resource management and call signaling protocol processing.
CPS comprises two modules:CPM and PAM.
CPS is a joint point of BSS system’s resource management and call signaling protocol processing.
CPS comprises two modules:CPM and PAM.
CPS-Call Processing Subsystem
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CPS Board
PSMB
CDSU
CDSU
CDSU
CDSU
CDSU
CDSU
CDSU
CDSU
CDSU
CDSU
CDSU
CDSU
CPM
CPM
PAM
G
P
S
T
M
TCM
G
P
S
T
M
PSMB
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Handle the signaling of Abis interface
Radio resource maintenance,management and distribution
Trunk resource management
provides A signaling interface. It fulfills A interface startup and re-startup, A interface protective switching, activation of failing data link, control of link labels, and delivery of A messages.
Control over loading of BSS;produce the message of A and ABIS interface:establish the signaling link to CCM and SVICM
Manage the database of BSS,include the parameters of BSS system,ground circuit resource,traffic channel resource,calling record,performances record,handoff record and so on.
Handle the signaling of Abis interface
Radio resource maintenance,management and distribution
Trunk resource management
provides A signaling interface. It fulfills A interface startup and re-startup, A interface protective switching, activation of failing data link, control of link labels, and delivery of A messages.
Control over loading of BSS;produce the message of A and ABIS interface:establish the signaling link to CCM and SVICM
Manage the database of BSS,include the parameters of BSS system,ground circuit resource,traffic channel resource,calling record,performances record,handoff record and so on.
CPS Functions
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Input and Output interface of CPS
CPS Subsystem
NIM 7 port
RS422
RS485
Alarm box
RS485
Connect to power modules of seven racks
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Hardware feature of CPMAccording to the software function of CPM,CPM should have the Hardware features below :CPS sub-system is a joint point of BSS system’s resource management and call signaling protocol processing,processing all the signaling,so the CPM should be powerful.
The CPM is 1+1 hot standby
According to the software function of CPM,CPM should have the Hardware features below :CPS sub-system is a joint point of BSS system’s resource management and call signaling protocol processing,processing all the signaling,so the CPM should be powerful.
The CPM is 1+1 hot standby
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CPM Panel
RUN:running indication
ALM:error status indication
ACT:green,active status indication
M/S:active/standby switch
RST:reset
TEST1:Ethernet debugging interface
RUN
ALM
ACT
M /S
RST
TEST
Run indicator
Fault indicator
Active/standby indicator
Active/standby switching key
Reset key
Ethernet debugging interface
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PAM Functionsmonitor the running status of the power supply modules in the BSC-side frames and the equipment room environment signals, including temperature, humidity, smoke, and so on.
report the result to the background operation and maintenance console through the NCM for processing;
provides duplex RS232 and RS485 interfaces for the connection of external monitoring devices and alarm box.
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CDSUS--Channel Data Service Unit Subsystem
1. Convert signal between RS-422 interface and non-channelized E1,transfer signaling and traffic data between BSC and BTS.
2. BSC-CDSU and BTS-CDSU, have the same hardware structure
1. Convert signal between RS-422 interface and non-channelized E1,transfer signaling and traffic data between BSC and BTS.
2. BSC-CDSU and BTS-CDSU, have the same hardware structure
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CDSU PanelRUN
ALM
DT0
DT1
RST
RUN Running
ALARM Alarm
DT0 Synchronization A
DT1 Synchronization B
RST Reset Button
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ASM
---In CDMA system, BSC communicates with BSC via AS
M board to enable inter-BSC soft handoff. The communic
ation link is connected to BSCs via E1 link.
---According to different bandwidth provided by the com
munication link, ASM board is classified into ASM board
providing 2*E1 trunk and ASM board providing 4*E1 trunk.
---In CDMA system, BSC communicates with BSC via AS
M board to enable inter-BSC soft handoff. The communic
ation link is connected to BSCs via E1 link.
---According to different bandwidth provided by the com
munication link, ASM board is classified into ASM board
providing 2*E1 trunk and ASM board providing 4*E1 trunk.
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TS--Timing Subsystem
According to the CDMA standard,BSC and BTS independently synchronization the timing signal provided by GPS.
Timing subsystem provides such timing signal:*PP2S*16chips : 19.6608MHz*TOD message
According to the CDMA standard,BSC and BTS independently synchronization the timing signal provided by GPS.
Timing subsystem provides such timing signal:*PP2S*16chips : 19.6608MHz*TOD message
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GPSTM
HIRS1
NCM
NCM
HIRS2
NCM
NCM
SVICM
SVICM
19. 6608MHz,10MHz, PP2S,
Tod
19. 6608MHz,10MHz, PP2S,
Tod
1. 2288MHz,PP2S, Tod
1. 2288MHz,PP2S, Tod
1. 2288MHz, PP2S, Tod, Tx_cl ock,
Rx_cl ock
1. 2288MHz, PP2S,8kHz, 2MHz, 50Hz,
Tod
NIM
NIM SVM
SVM
1. 2288MHz, PP2S, Tod, Tx_cl ock,
Rx_cl ock
1. 2288MHz, PP2S,8kHz, 2MHz, 50Hz,
Tod
BSC_CDSU
CPM
GPSTM
GPSTMBP
TCM
Timing distributing of BSC
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TS Box
PSMB
CDSU
CDSU
CDSU
CDSU
CDSU
CDSU
CDSU
CDSU
CDSU
CDSU
CDSU
CDSU
CPM
CPM
PAM
G
P
S
T
M
TCM
G
P
S
T
M
PSMB
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TCM FunctionsTCM board mainly provides the following functions:
1. It receives clock signals of active and standby GPSTMs;
2. It synthesizes and distributes 10MHz signals;
3. It receives 16CHIP and PP2S signals of active and standby GPSTMs;
4. It implements phase-lock on 16CHIP signal;
5. It generates new PP2S.
TCM board mainly provides the following functions:
1. It receives clock signals of active and standby GPSTMs;
2. It synthesizes and distributes 10MHz signals;
3. It receives 16CHIP and PP2S signals of active and standby GPSTMs;
4. It implements phase-lock on 16CHIP signal;
5. It generates new PP2S.
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TCM PanelRUN green Lights up when the TCM works normally
ALM red Lights up when the TCM works abnormally
LOCK green Lights up when the TCM is locked
CLK: an SMA socket, used for monitoring of the TCM’s 16chip timing signal
PP2S: an SMA socket, used for monitoring of the TCM’s PP2S timing signal and for BS testing
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GPSTM Function
GPSTM receives 1PPS signal from GPS receiver and generates PP2S signal, 16CHIP signal, 10MHz signal and TOD signal via phase-lock for the usage of the system. In case GPSTM cannot find the satellite, it provides the hold-over function. According to the specifications, the wander of the board should not be over 7ms in 24 hours; in this system, GPSTM implements less than 5ms wander in 4 days. GPSTM also implements active/standby automatic switching. It can detect and report board working states.
GPSTM receives 1PPS signal from GPS receiver and generates PP2S signal, 16CHIP signal, 10MHz signal and TOD signal via phase-lock for the usage of the system. In case GPSTM cannot find the satellite, it provides the hold-over function. According to the specifications, the wander of the board should not be over 7ms in 24 hours; in this system, GPSTM implements less than 5ms wander in 4 days. GPSTM also implements active/standby automatic switching. It can detect and report board working states.
GPSTM TCM
16CH IP PP2S
Clock
Clock
10MHz or 12MHz10MHzFDM
GPSTM
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GPSTM
Run indicator
Active/standby indicator
Indication of searching for satellite
RST
Fault indicator
Reset key
Power switch
16CHIP output
Indication of IPPS phase exceeding 800ns
CONTROL
GPSAIM
RUN
ACTIVE
1PPSAIM
AIM
CLK
PWR
RS232
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The End