Transcript BSC物理结构 - Indian Telephone Industries Limited

Introduction to
ZXC10-BSC
ZTE 中兴CDMA
Content
A BSC overview
B subsystems of BSC
ZTE 中兴CDMA
A BSC Overview






Position in system
Hardware Architecture
Mechanical and electrical Features
Logical Structure
Performance
Working environment
ZTE 中兴CDMA
Position in system
BSS
MS
BTS
MS
BTS
BTS
BSC
VLR
HLR
MSC
PSTN
MS
ISDN
BTS
BTS
MS
Um Interface
BSC
BTS
Abis Interface
A Interface
other MSC
ZTE 中兴CDMA
Hardware Architecture
TO
BTS
TS
SVBS
BSM
HIRS
CDSUS
CPS
。
。
。
TO
MSC/LE
SVBS
HIRS： High-speed Interconnect Router Subsystem
CDSUS：Channel/Data Service Unit Subsystem
SVBS： Selector & Vocoder Bank Subsystem
TS：
Timing Subsystem
CPS：
Call Processing Subsystem
BSM：
Base Station Management Subsystem
ZTE 中兴CDMA
Mechanical and electrical Features
 BSC consists of central rack and vocoder rack.
 Central rack and vocoder rack apply standard rack and insertion box.
The different types of insertion box are composed of different inserted
boards.
 From top to bottom, the whole rack contains: a power distribution
insertion box, 3~5 function insertion boxes, a fan box and anti-dirt
frame.
 There are three kinds of function insertion boxes:
HIRS layer: consists of PSMB, NIM, NCM, etc.
CDSU layer: consists of PSMB, CDSU（or CDSU, CPM, TCM,
GPSTM）, etc.
SVBS layer: consists of PSMB, SVM, SVICM, etc.
Max.number of cards in each function insertion box:22
ZTE 中兴CDMA
Rack
ZTE 中兴CDMA
Central rack
ZTE 中兴CDMA
Vocoder Rack
ZTE 中兴CDMA
Logical Structure

BSC

HIRS
CDSUS
SVBS
TS
CPS
Subsystem
BSM
CPM
TCM
GPSTM
SVM
SVICM
BSC _CDSU
NIM
NCM

SVP
SVE

System
Module
Unit
ZTE 中兴CDMA
Performance
 Max. number of E1links of A interface: 240（240 x 30 =7200 circuits）
 Max. number of selector/vocoder :7200
 Max. traffic processing capability:5040 Erl （7200 x 0.7）
 BHCA：310K
 Max number of subscribers：170K（0.03 Erl per subscriber，5040/0.03）
 Max number of BTS can be connected to BSC ：
 380（single carrier frequency and omni-direction, 192channels/BTS,
13.2erl，5040/13.2 ）
 128 (single carrier frequency with three sectors,192channels/BTS , 60 traffic
channel， 39.6erl，5040/39.6)
 Access Network Interfaces Interoperability Specification : IOS2.x，IOS3.x，
IOS4.x
 Support soft handoff between BSC
 8K、13K QCELP and 8k EVRC vocoder
 Data service：9.6kbps、14.4kbps
ZTE 中兴CDMA
Working environment
Long term working temperature: +15℃~+35℃
Short term working temperature: 0℃~+45℃
Long term working humidity: 40%~65%
Short term working humidity: 15%~90%
The concentration of dirt with diameter larger than
5μm should be ≤3×104grains/m. In addition, the dirt
should not be conductive, electro-magnetic or
corrosive.
ZTE 中兴CDMA
B Subsystems of BSC
 HIRS： High-speed Interconnect Router
Subsystem
CDSUS：Channel Data Service Unit Subsystem
SVBS： Selector/Vocoder Bank Subsystem
TS：
Timing Subsystem
CPS：
Call Processing Subsystem
ZTE 中兴CDMA
B Subsystems of BSC
HIRS： High-speed Interconnect Router
Subsystem
CDSUS： Channel Data Service Unit Subsystem
SVBS： Selector/Vocoder Bank Subsystem
TS：
Timing Subsystem
CPS：
Call Processing Subsystem
ZTE 中兴CDMA
HIRS
HIRS Subsystem is switching center and packet
data exchange platform of BSS。
Function of HIRS：
 Packet data switching
 Flow control
 Timing distribution，monitor GPS
 Software downloading
ZTE 中兴CDMA
HIRS Box
P N N N N N N N N N N N N N N N N N N N N P
O I I I I I I I I I C C I I I I I I I I I
O
W M M M M M M M M M M M M M M M M M M M M
B
W
B
ZTE 中兴CDMA
Structure of HIRS
TS
clk
HIRS
TOD
Ethernet Interface
clk
BSM
dis
co
I 2C
U
gateway
U
gateway
NCM
NCM
NIM
7
dis
co
I 2C
NCM
NCM
0
7
NIM
NIM
NIM
0
7
CPS
0
7
422
CPM
CPM
CDSUS
BSC_CDSU
SVBS
BSC_CDSU
SVBS
non-channelized E1
BDS
BTS_CDSU
non-channelized E1
BDS
BTS_CDSU
BDS
BTS_CDSU
ZTE 中兴CDMA
NCM —— Network Control Module
 Manage the HIRS
 Interface to Base Station Management
Subsystem(OMC)
 Timing receiving and distributing
ZTE 中兴CDMA
Structure of NCM
DISCO
422 232
Ethernet
19.44M
．
CHIP PP2S
M/S
Control
Signal
UG
Gateway
Unit
at
e
ATM
I/F
Unit
LVDS
I/F
Main Control
Unit
CLK, Power & Reset
Unit
Main Control
Logic Unit
ZTE 中兴CDMA
Functions of various parts
 U-gateway unit: Implements dual-bus arbitration and routing the interior or
outgoing packet.
 ATM interface unit: Implements interconnection to another frame, and
provides interfaces for future expansion.
 Main control unit: The CPU system, which implements distributing various
modules’ software and configuration information; modifying, notifying and
confirming local device status; maintaining local copy of the configuration
database; detecting, isolating, reporting and recovering the HIRS network
errors; monitoring the performance of HIRS network; receiving broadcast
TOD message, controlling and maintaining GPSR (GPS receiver). Also it
implements operation and maintenance of the whole BSS system.
 Clock power supply reset unit: Provides the power supply to the board, and
1.5V power supply to the backplane; clock driving and distributing; provide
board reset signal.
 Main control logic unit: Implements active/standby competition and
switchover, in-board status detection, control and reporting.
ZTE 中兴CDMA
NCM Panel
HL12
HL14
HL2
 HL12: Running indicator (green), with the
blinking speed representing different processes
running;
 HL14: Alarm indicator (red), lighting up when
a software error occurs;
 HL2: Active indicator (green), lighting up when
the board is in active state;
SW5
 SW5: Manual active/standby switchover button;
 SW3: Reset button.
SW3
ZTE 中兴CDMA
NIM －Network Interface Module
Receive/send RS-422 serial data
Receive/send data through DISCO
8＋1 redundancy
Clock receiving and distributing
ZTE 中兴CDMA
Structure of NIM
422
Driver
Back
Plane
HDLC
Unit
Control Unit
GTLP
Driver
Buffer
DISCO
Unit
ZTE 中兴CDMA
Functions of various parts
 Control unit: Implements board startup, self-test, status error
reporting, N+1 switchover etc.
 DISCO Unit: Transmits the data in the reception buffer to the
UGATE of the NCM, or saves the data from the UGATE into the
sending buffer.
 HDLC Unit: Receives the HDLC data frames from the CPM,
NCM, SVICM or CDSU and save them into the buffer, or takes
data from the sending buffer, converts them into the HDLC
format and sends them to the CPM, NCM, SVICM or CDSU.
 422 driver: Drives the HDLC data code flow, PP2S and CHIP
signals.
 GTLP driver: Drives the DISCO dual-bus data and control
signals.
ZTE 中兴CDMA
NIM Panel
NIM
RUN
ALM
ACT
 RUN: A green indicator, blinking when
the board works normally.
 ALM: A red indicator, blinking or
lighting up in case of board failure.
RST
 ACT: A green indicator, lighting up
when the board is in master mode.
 RST: Reset button.
ZTE 中兴CDMA
Subsystem of BSC
HIRS: High-speed Interconnect Router Subsystem
CDSUS： Channel Data Service Unit Subsystem
SVBS： Selector/Vocoder Bank Subsystem
TS：
Timing Subsystem
CPS：
Call Processing Subsystem
ZTE 中兴CDMA
CDSU Subsystem
Convert signal between RS-422 interface
and non-channelized E1,transfer signaling
and traffic data between BSC and BTS.
BSC-CDSU and BTS-CDSU,and have the
same hardware structure.
ZTE 中兴CDMA
BSC-CDSU － Channel/Data Service Unit IN BSC
RS422 Interface Unit
E1 Interface Unit
Route
Arbitra
tion
Unit
E1 Interface
E1 Interface
Control Unit
BSC-CDSU
 Provide
the
E1
link
interconnection with BTS-CDSU；
 Support flow control；
 Supply the RS-422 interface
interconnect with NIM；
 Monitor and maintain E1 link；
 Routing and BUS arbitration。
ZTE 中兴CDMA
BTS-CDSU － Channel/Data Service Unit IN BTS
RS422 Interface Unit
Route Arbiter Unit
Control Unit
BTS-CDSU
 Provide the E1 link interconnect
with BSC-CDSU ；
 Support daisy-chain between
BTS and provide the E1 link；
 Provide
RS-422
interface
interconnect with CCM。
 Monitor and maintain E1 link；
 Flow control
 Routing and BUS arbitration
ZTE 中兴CDMA
CDSU Panel
RUN
ALM
SYNCA
SYNCB
 RUN
Running
 ALARM
Alarm
 SYNCA
Synchronization A
 SYNCB
Synchronization B
 RST
Reset Button
RST
ZTE 中兴CDMA
Subsystem of BSC
 HIRS:
High-speed Interconnect Router
Subsystem
CDSUS： Channel Data Service Unit Subsystem
SVBS： Selector/Vocoder Bank Subsystem
TS：
Timing Subsystem
CPS：
Call Processing Subsystem
ZTE 中兴CDMA
SVBS
SVBS is the physical unit of Selector/Vocoder resource pool in
BSC,composed of 1 SVICM and 8 SVMs.
 Path selection：select a path in several soft handoff path by
the quality
 Transcoding ： convert code between PCM and QCELP or
EVRC
 Echo cancellation: Echo cancellation in forward link
 Judge and implement soft handoff
 Power control
 Signaling handling(No.7 and/or v5.2)
ZTE 中兴CDMA
SVBS Box
P S S S S S S S S
O V V V V V V V V
W M M M M M M M M
B
S
V
I
C
M
S S S S S S S S S
V V V V V V V V V
I M M M M M M M M
C
M
P
O
W
B
ZTE 中兴CDMA
Structure of SVBS
RS422
SVICM
To HIRS
E1
DISCO BUS
SVM1
SVM2
SVM8
To
MSC(LE)
ZTE 中兴CDMA
SVICM
－
Selector & Vocoder Interface Control Module
S-HIRS
 Distribute forward traffic and signaling（SVMSVICM  NIM）
 Distribute reverse traffic and signaling （SVMSVICM  NIM）
 Distribute signaling within SVBS（SVMSVICM ）
Receive and Distribute Clock and TOD
message
Manage and control SVM
Interconnect with MSC(LE)
ZTE 中兴CDMA
Structure of SVICM
Dis
Bus
Driver
RS-422 Gateway
Unit
CO
5M
GPS
Clock
Generate
Unit
DISCO Bus
5M
Interface
Unit
16.384M
20M
Debug Interface
SVC
Monitor Interface
E1X4
2M HW X4
2M、8K、20ms
PP2S、Chip
（From/to SVM）
DTI unit
（from/to MSC）
ZTE 中兴CDMA
Functions of various parts
 SVC unit: The kernel control part of the SVICM. With a highperformance processor as its CPU, it is responsible for the
maintenance and management of the SVBS internal software and
configuration data and the control and maintenance of various
SVMs in the SVBS;
 DISCO logic unit: Implements communication with the HIRS
network, that is, link with the HIRS network of the BSC through
a gateway;
 Gateway Unit: Implements the communication with the SVM;
 Digital Trunk Interface(DTI) unit: Implements the PCM link
between the MSC and the BSS;
 Clock generation unit: Generates the working clock (20ms)
required by the SVBS with the received system clock as
reference.
ZTE 中兴CDMA
SVICM Panel
RUN
 RUN: Running indicator (green), blinking during
operation;
ALM
 ALARM: Alarm indicator (red), lighting up when a
software error occurs;
SYNA
 SYNA: 1st E1 connection indicator, lighting up to
indicate that the E1 link is connects;
SYNB
SYNC
SYND
 SYNB: 2nd E1 connection indicator, lighting up to
indicate that the E1 link is connects;
 SYNC: 3rd E1 connection indicator, lighting up to
indicate that the E1 link is connects;
 SYND: 4th E1 connection indicator, lighting up to
indicate that the E1 link is connects;
RST
 RST: Reset button.
ZTE 中兴CDMA
SVM － Selector & Vocoder Module
 transcoding between PCM and QCELP or EVRC
 reverse outer-loop power control
 soft handoff
 handle layer 3 of Abis interface and layer 2 of IS95 signaling
 assign the timeslot
ZTE 中兴CDMA
Function of SVM
SVE1
数据接口
 selector/vocoder processor
SVP
SVE2
 selector/vocoder Element
维护总线
时钟接口
HW接口
SVE15
SVICM receive traffic data from the RS-422 port of NIM then
forward to SVM,SVP forward to SVE,SVE transcoding to PCM
and send through HW,in other direction,SVE transcoding PCM to
QCELP or EVRC,then send to SVP,then to SVICM,and then NIM.
A SVM contain 1 SVP and 15 SVEs.
ZTE 中兴CDMA
Structure of SVM
Clock,Reset
And
Power
circuit
SVE
DSP1
……
Main
Control
Unit
DSP5
Data Interface
Unit
HW
Interface
B
a
c
k
p
l
a
n
e
ZTE 中兴CDMA
Functions of various parts
 Main control unit: Performs the control of SVE and data
interface unit; implements selector and power control
functions; fault detection and reporting;
 Data interface unit: Provides a packet data interface for the
communication within the BSS system;
 HW interface unit: Implements PCM clock conversion and
provides PCM code flow data channel for SVE;
 SVE: Implements PCM-QCELP conversion, with 15
vocoders;
 Clock, reset and power circuit: Implements clock and board
reset of the main control unit, and provides all types of
power supplies, including 5V, 3.3V and 2.5V.
ZTE 中兴CDMA
SVM Panel
RUN
ALARM
RESET
 RUN: Running indicator
(green), blinking during
working normally;
 ALARM: Alarm indicator
(red), lighting up when a
software error occurs;
 RESET: Reset button.
ZTE 中兴CDMA
Subsystem of BSC
 HIRS: High-speed Interconnect Router
Subsystem
CDSUS： Channel Data Service Unit
Subsystem
SVBS： Selector/Vocoder Bank Subsystem
TS：
Timing Subsystem
CPS：
Call Processing Subsystem
ZTE 中兴CDMA
Timing Subsystem
According to the CDMA standard,BSC and BTS independently
synchronize the timing signal provided by GPS
Timing subsystem provide such timing signal:
* PP2S
* 16chips：19.6608MHz
* TOD message
TS
CHM1
GPSTM
TCM
CHM1
NCM1
CHM1
NCM2
ZTE 中兴CDMA
GPSTM — GPS Timing Module
10MHz
1PPS
GPS CLOCK
RECEIVING
GPS Data
16chip
GPS
PLL
GPSTM
10MHz
1PPS
GPS CLOCK
RECEIVING
GPSTM
Control interface
TOD
GPS antenna
part
GPS Data
16chip
GPS
PLL
PP2S
1PPS
1PPS
G
P
S
T
M
B
P
10MHz
19.6608MHz
TOD
Control interface
Control interface
TOD
ZTE 中兴CDMA
TCM — Timing Control Module
ZTE 中兴CDMA
TCM Panel
 RUN
green
works normally
Lights up when the TCM
 ALM
red
works abnormally
Lights up when the TCM
 LOCK
green
is locked
Lights up when the TCM
 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
ZTE 中兴CDMA
timing distributing of BSC
1.2288MHz,
PP2S,Tod
19.6608MHz,
10MHz,PP2S,
Tod
1.2288MHz,PP2S
,Tod,Tx_clock,
Rx_clock
CPM
NCM
GPS
TM
GPS
TM
G
P
S
T
M
B
P
NCM
T
C
M
1.2288MHz,PP2S,
8kHz,2MHz,50Hz,
Tod
NIM
SVICM
SVM
NIM
SVICM
SVM
HIRS1
NCM
NCM
HIRS2
19.6608MHz,
10MHz,PP2S,
Tod
1.2288MHz,
PP2S,Tod
1.2288MHz,PP2S
,Tod,Tx_clock,
Rx_clock
BSC_CDS
U
1.2288MHz,PP2S,
8kHz,2MHz,50Hz,
Tod
ZTE 中兴CDMA
Subsystem of BSC
HIRS: High-speed Interconnect Router Subsystem
CDSUS： Channel Data Service Unit Subsystem
SVBS： Selector/Vocoder Bank Subsystem
TS：
Timing Subsystem
CPS：
Call Processing Subsystem
ZTE 中兴CDMA
CPS
CPS is a joint point of BSS system’s resource
management and call signaling protocol processing.
Handle the signaling of ABIS interface
Radio resource management and distribution,
Trunk resource management
Processing of MTP3 and SCCP of SS7
CPM
ZTE 中兴CDMA
CPM － Call Processing Module
Control over loading of BSS;produce the message of
A and ABIS interface:establish the signaling link to
CCM and SVICM
Radio channel resource management, maintenance
and distribution
SS7 /v5.2 interface
Manage the database of BSS,include the
parameters,trunk resource, radio channel resource,
traffic channel resource, call record,performances
record,handoff record.
ZTE 中兴CDMA
CPS Box
P
S
M
A
C
D
S
U
C
D
S
U
C
D
S
U
C
D
S
U
C
D
S
U
C
D
S
U
C
D
S
U
C
D
S
U
C
D
S
U
C
D
S
U
C
D
S
U
C
D
S
U
C
D
S
U
C P C C G T G P
D A P P P C P S
S M MMS MS M
U
T
T A
M
M
ZTE 中兴CDMA
Hardware feature of CPM
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.
 CPS sub-system is a joint point of BSS system’s
resource management and call signaling protocol
processing，so the CPM should be 1+1 hot standby
ZTE 中兴CDMA
Structure of CPM
CPM
CPU1
NIM
Debugging port
RS232/Ethernet
BDM Interface
DPRAM
M/S
Controller
Standby
CPM
CPU2
M/S
Communication
Debugging port
RS232/Ethernet
BDM Interface
）
ZTE 中兴CDMA
Function of various parts
CPU1: Connection and communication with
the HIRS;
Dual-port RAM: Communication
between two CPUs;
path
CPU2: The kernel of the CPM, implements
the call processing function
ZTE 中兴CDMA
CPM panel
RUN
Running Indicator
ALM
Error Status
Indicator
ACT
Active/Standby
Status Indicator
 RUN
green
 ALM
red
green
running indication
error status indication
M/S
Active/Standby
Switch Button
 ACT
RST
Reset Button
 M/S
active/standby switch
 RST
reset
TEST1
CPU1 Ethernet
Debugging Port
TEST2
CPU2 Ethernet
Debugging Port
active status indication
 TEST1
CPU1 debugging port
 TEST2
CPU2 debugging port
ZTE 中兴CDMA
Other Module
PAM:Power Alarm Module
ZTE 中兴CDMA
PAM
 monitor the running status of the power supply
modules in the BSC-side frames and the
equipment room environment signals, including
temperature, humidity and smoke,
 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.
ZTE 中兴CDMA
Structure of PAM
Power
Board
Alarm box
External
scout &
control
device
Smog,
Temperature,
Humidity ...
Memory
UART
Communication
Controller
CPU
HDLC
Communication
Controller
NCM
Sensor
I/F
ZTE 中兴CDMA
PAM Panel
Green led, Run
lamp
Red led, Alarm
lamp
Reset Botton
PAM
RUN
ALM
RST
 RUN, green, indicating normal operation
status of the board software
 AlM, red, indicating communication
error and environment alarm
 RST, reset of the board
ZTE 中兴CDMA
Address scenario
Flow
contr
ol
2bit
type
2bit
BssID
SubN
et
Node
Port
Path
Modul
Unit
3bit
1bit
4bit
4bit
4bit
4bit
8bit
For
routing
B-HIRS
in
For
routing
S-HIRS
in
ZTE 中兴CDMA
The end !
ZTE 中兴CDMA