zxg10 zte ibsc introduction
TRANSCRIPT
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ZXG10 iBSC Introduction
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Contents
General Introduction
Hardware Architecture Software Architecture
System Principle
System Dimensioning
Summary
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SGSN GGSN
NodeB
RNC
NodeB
BTS
BSC
BTS
MSC/VLR GMSC
Inter-PLMN
PSTN
MGW GMGW
Gb
IuPs
IuCs
A
Mc
Nb
Nc
Iur-g
Network Structure
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What is the Meaning of i ?
intelligentintelligent identification of wireless
access intelligent error
self-correction
integrationintegrates multi-interfaces
E1/STM-1/IP integrates multi
transmission supported
immensitylarge capability
supports 3072 TRX and 15000 Erl
with only two racks
intensifyintensified design
supports FR/EFR/HR/AMR/WB-AMR,
innovative NetSpeed wireless
enhanced technology
IPAll-IP platform
supports IP bearer
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All-IP Hardware Platform
According to network developing trend
By means of all-IP platform, iBSC can offer better PS services,
can easily realize IP Abis and IP Gb interface
Separation of User Plane and Control Plane
All-IP hardware is universal for ZXG CN, ZXWN RNC
(WCDMA) and ZXTR RNC (TD-SCDMA)
All-IP Hardware
ZXG
CN
ZXWN
RNC
ZXG
iBSC
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Based on V3 Unified Hardware Platform All-IP Design
User Plane and Control Plane Separation
Modularization
Smooth EvolutionZXG10 iBSC
Hardware Platform
All-IPSmooth
EvolutionModule
Two iBSC Platform s
iBSC
All-IP Enhanced iBSC
Advanced Hardware Structure
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Modularized Design
Boards Same boards make up Interface Units with
different software
Different interface units form Resource Unit
AIU/BIU/PCU/TCU exist in logic only, all
interface units are placed in BGSN
RACK1
BCTC
BGSN
BPSN
BGSN
BGSN
BGSN
BGSN
BGSN
RACK2RACK1
BCTC
BGSN
BPSN
BGSN
Easy Expansion
System expansion by
adding RCBU only
3RCBU/2racks
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Flexible Access & Evolution
iBSC Supports Various Access Standards E1 STM-1 FE/GE
Microwave Satellite
Evolution
BSC
BSC
RNC
RNC
RNC&BSC
RNC&BSC
RNC&BSC
RNC&BSC
BSC
BSC
BSC
iBSC iBSC iBSC
Benefits
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Interface Types of ZXG10 iBSC
No. Logic Interface Connected NE Physical Interface Type
1. A MSC STM-1,E1,FE/GE
2. Gb SGSN E1,FE/GE
3. Abis BTS E1, STM-1, FE/GE
4. Ater iTC STM-1E1
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All-IP Enhanced iBSC Interface Indices
A-Interface E1(T1) A STM-1 A IP A
Abis
InterfaceCabinet
Number of
carriers
Interface
Capability
Number
of
carriers
Interface CapabilityNumber of
carriersInterface Capability
E1(T1) Abis
Single
Cabinet1024
Abis:208 E1(T1)1024
Abis:208 E1(T1)1024
Abis:208 E1(T1)
A:188E1(T1) A:4 pairs of STM-1 A:1 pair of GE
Dual
Cabinets3072
Abis:624 E1(T1)3072
Abis:624 E1(T1)3072
Abis:624 E1(T1)
A:700E1(T1) A:11 pairs of STM-1 A:2 pairs of GE
STM_1 Abis
Single
Cabinet1024
Abis:3 pairs of
STM-1 1024Abis:3 pairs of STM-1
1024Abis:3 pairs of STM-1
A:188E1(T1) A:4 pairs of STM-1 A:1 pair of GE
DualCabinets
3072
Abis:9 pairs of
STM-1 1024Abis:9 pairs of STM-1
3072Abis:9 pairs of STM-1
A:700E1(T1) A:11 pairs of STM-1 A:2 pairs of GE
IP Abis
Single
Cabinet1024
Abis:1 pair of GE1024
Abis:1 pairs of GE2048
Abis:1 pair of GE
A:252E1(T1) A:4 pairs of STM-1 A:1 pair of GE
Dual
Cabinets 3072
Abis :2 pairs of
GE 3072Abis:2 pairs of GE
3072Abis:2 pairs of GE
A:700E1(T1) A:11 pairs of STM-1 A:2 pairs of GE
IPoE Abis
(EIPI+DTB)
SingleCabinet
1024Abis:160 E1(T1)
1024Abis:160 E1(T1)
1024Abis:160 E1(T1)
A:188E1(T1) A:4 pairs of STM-1 A:1 pair of GE
Dual
Cabinets3072
Abis:480 E1(T1)3072
Abis:480 E1(T1)3072
Abis:480 E1(T1)
A:700E1(T1) A:11 pairs of STM-1 A:2 pairs of GE
IPoE Abis
(EIPI+SDTB
2)
SingleCabinet
\\
1024Abis:3 pairs of STM-1
1024Abis:3 pairs of STM-1
\ A:4 pairs of STM-1 A:1 pair of GE
Dual
Cabinets\ \ 3072 11 pairs of STM-1 3072 A:2 pairs of GE
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Physical Indices
All-IP Enhanced iBSC Physical Indices
Index ZTE
Dimension (H*D*W) (mm) 2,000 * 800 * 600
Weight
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Most Powerful Processing Capability
ZTE Large-Capacity iBSC
All-IP architecture, meet IP evolution trend
Powerful processing capacity
Support E1/T1/STM-1/IP interface, flexible network building
Item Description ZTE
BHCA 4200K
Maximum voice traffic Erl 15000Erl
Maximum throughput of Gb interface 600Mbps
Number of Support TRX 3,072
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Contents
General Introduction
Hardware Architecture
Software Architecture
System Principle
System Dimensioning
Summary
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iBSC Structure - Shelves
(BPSN)
Switch Shelf
(BGSN)
Resource Shelf
(BCTC)
Control Shelf
(BGSN)
Resource Shelf
Control Shelf (BCTC)
Resource Shelf (BGSN)
Switch Shelf (BPSN)
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Board
NameFull Name Configuration Principle Functions Backup
OMP
Operation and
Maintenance Processing
Board
1 pair per BCTC
Provide global processing and controls
O&M of the whole system (including O&M
agent)
1+1
CMPControl Main Processing
Board
Depends on the configuration
capacity.
Provide connection with the switching unit
of control plane, implementing all the
protocol processing on control plane
1+1
CHUB Control Plane HUB 1 pair per iBSCCenter where the control flows of BPSN,
BGSN, and BCTC gather1+1
ICM Integrated Clock Module 1 pair per iBSC Provide system clock 1+1
UIMCUniversal Interface Module
for Control plane1 pair per BCTC Signaling switching center of the BCTC 1+1
SBCXX86 Single Board
Computer2 per iBSC Provide OMM function 1+1
Main BCTC boards layout:
(Global boards include SBCX, OMP, ICM,
CHUB are configured in the main BCTC)
Normal BCTC boards layout:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17Rea
rBoard
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17FrontBoard
Control Shelf
BCTC
CMP
CMP
CMP
CMP
SBCX
SBCX
R
SVB
R
SVB
UIMC
UIMC
RUIM2
RUIM3
OMP
OMP
R
MPB
R
MPB
ICM
ICM
RCKG1
RCKG2
RCHB1
RCHB2
CHUB
CHUB
iBSC Shelf - BCTC
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RUIM2
RUIM3
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17RearBoard
GLI
GLI
GLI
GLI
PSN
PSN
UIMC
UIMC
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
FrontBoa
rd
Packet Switching Shelf
BPSN
GLI
GLI
CMP
CMP
CMP
CMP
Board Name Full Name Configuration Principle Functions Backup
PSNPacket Switching
Network1 pair per BPSN
Provides data switching among
GLIs
Load
sharing
GLI Gigabit Line InterfaceEvery 2 pairs GUIM with 1
pair GLI
Provides physical layer adaptation,
IP packet check, fragmentation,
transfer management, and trafficmanagement
Load
sharing
CMPControl Main Processing
Board
Depends on the configuration
capacity.
Provide connection with the
switching unit of control plane,
implementing all the protocol
processing on control plane
1+1
UIMCUniversal Interface
Module for Control plane1 pair per BPSN
Provides signaling switching in
BPSN1+1
Main BPSN boards layout:
(Global boards include PSN, GLI, CMPare configured in the main BCTC)
Normal BPSN boards layout:
iBSC Shelf - BPSN
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Main BGSN boards layout:
(Global boards include OMP,
GIPI,GUP2, SPB2,DTB,SDTB2 are
configured in the main BGSN)
Normal BGSN boards layout:
RGUM1
RDTB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17RearBoard
SPB2
GUIM
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
FrontBoard
Gigabit Resource Shelf
BGSN
DTB
GUIM
RGUM2
EIPI
GUP2
RSPB
GUP2
RSPB
RDTB
SPB2
SPB2
RSPB
GUP2
DTB
iBSC Shelf - BGSN
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iBSC Shelf - BGSN
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iBSC StructureConnection Between Shelves
Clock distribution cable and line clock extracting cable
Control plane Ethernet cable
User plane fiber
Monitoring cable
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Clock Extracting and Distribution
UI
MC
O
M
P
ICM
CHUB
Power distribution plug-in box
BGSN
BGSN
BCTC
BPSN
Fan plug-in box
GUI
M
GUI
M
UI
MC
Clock reference
Clock distribution
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Control Plane Ethernet Connections
GUI
M
UIMC
OM
P
I
C
M
CHUB
GUIM
UIMC
Power distribution plug-in box
Fan plug-in box
BGSN
BGSN
BCTC
BPSN
Control plane Ethernet interconnection
Realized through CHUB board
CHUB UIMC in BCTC through the
backplane printed cable
CHUB UIMC in BPSN through Ethernet
cable
CHUB GUIM in BGSN through Ethernet
cable
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User Plane Connections
GUI
M
UIMC
O
MP
ICM
CHUB
GUIM
UIMC
GLI
Power distribution plug-in box
Fan plug-in box
BGSN
BGSN
BCTC
BPSN
User Planeinterconnection
GLI GUIM
Fiber optic cables are used for the connections
between GLI and GUIMs in BGSN
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Monitoring Circuit Connections
Sensor
GUI
M
UI
MC
O
M
P
ICM
CHUB
GUI
M
UIMC
GLI
Cabinet-top fan
Power distribution plug-in box
Fan plug-in box
Fan plug-in box
Fan plug-in box
BGSN
BGSN
BCTC
BPSN
Monitoring of fans
Monitoring of PWRD boards
Monitoring of external environment
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Board
Name
Board Function
Name
Functions
GIPI IPBB Implements IP Abis interface access and detaches the user plane
data and the control plane data.
IPI Implements IP A-interface access and detaches the user plane data
and the control plane data.
IPGB Implements IP Gb interface access and detaches the user plane
data and the control plane data.
GUP2 BIPB2 Performs TDM/IP packet conversion and IP packet splitting and
assembling.
AIPB Performs RTP protocol processing
UPPB2 Performs PS-domain user plane protocol processing
DRTB2 Performs transcoding and rate adaptation
SPB2 LAPD2 Performs LAPD signaling processing
SPB2 Performs SS7 signaling processing
GIPB2 Implements E1 Gb interface access and FR protocol processing
iBSC Board Name & Board Function Name
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Contents
General Introduction
Hardware Architecture Software Architecture
System Principle
System Dimensioning
Summary
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Foreground Software
HARDWARE
BSP & Drivers
OSSB
R
S
P
P
VxWorks
S
C
S
D
B
S
O
M
S
SS
R
AN
C
R
A
N
S
S
R
AN
U
M
C
R
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BSP & Drivers OSS
BRS
SCS
OMS
RANC
RANSS
PP
DBS
SS
RANU
MCS
Foreground Software
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Contents
General Introduction
Hardware Architecture
Software Architecture System Principle
System Dimensioning
Summary
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iBSC Structure - Logic Unit
Power, Fan
Processing unit
O&M unit
Peripheral device
monitoring unit
A
ccessunit
SwitchingUnit
ZXG10 iBSC
BTS
MSC
SGSN
TC unit
User plane
Processing unit
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O&M Unit
OMP Board SBCX
OMP
OMP
H
U
B
-R
100M Ethernet
SVBSBCX
OMP
OMP
H
U
B
OMCR
Switching
Unit
100M Ethernet
SBCX
O&M Unit
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Processing Unit & Peripheral Device Monitoring Unit
CMP board PS/CS service and call control management BSSAP, BSSGP and system resource management
PWRD and ALB
PWRD collects the information of peripheral equipment and
environment, including status of power distributor and fan,
temperature, humidity, fog, water, and infrared, etc.
ALB for alarm based on different alarm grades
Processing Unit - CMP
Peripheral Device Monitoring Unit - PMU
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Access Unit - Abis Interface Unit (BIU)
E1/T1 HW
1
2
32
BIU
LAPD
E1 Abis
T
User plane
switchingnetwork
Control plane switching network
Internal
Ethernet
To TCU or UPU
To CMP
DTB
UIMU
GUP
SPB
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Access Unit - Abis Interface Unit (BIU)
BIU
UPU
TCU
HW
IP Abis
User planeswitchingnetwork
Control plane switching network
Internal
Ethernet
External
Ethernet
SCTP
UDP
To CMP
IPBB BIPB2
GIPI
GUP2 G
UP2
GUP2
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Access Unit - Abis Interface Unit (BIU)
BIU
UPU
TCU
HW
InternalEthernet
SCTPIP
To CMP
(GE)
1
2
32
E1/T1
IPoE Abis
PPPHDLC
UDP
UDP
User plane
switching
network
Control plane switching network
BIPB2
DTB
EIPI
ML/MC-PPP
RTP
cUDP
RTP
cUDP
GUP2 G
UP2
GUP2
(FE)
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Access Unit A-Interface Unit (AIU)
E1/T1 HW
12
32
TCU
MTP2
1
2
16
AIU
STM-1
UIM
T
User plane
switching
network
Control plane switching network
InternalEthernet
T network onlocal layer UIM
E1 A
DT
B
SPB
GUP
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Access Unit A-Interface Unit (AIU)
AIU
AIPB
HW
InternalEthernet (GE)
ExternalEthernet
SCTP
To CMP
BIPB2
UDP
Control plane switching network
User plane
switching
network
IP A
IPI
GIPI
GUP2
RTPUDP
RTPUDP
GUP2
(FE)
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Access Unit - Gb Interface Unit (GIU)
E1/ T1
1
2
16
UPPB
1
2
16
GIU
User plane
E1 GB
To CMP
UDPnetworkswitching
Control plane switching network
SPB
SPB
GUP
Internal
Ethernet
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Access Unit - Gb Interface Unit (GIU)
Control plane switching network
GIU
UPPB2
HW
Internal
Ethernet
External
Ethernet(GE)
UDP
To CMP
UDP
BIPB2
UDP
IP Gb
User plane
switching
network
IPGB
GIPI
GUP2
GUP2
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User plane Processing Unit
UPU
Transcoder Unit
TCU
UPU & TCU
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2*GE
FE
1stSwitch Subsystem 2
ndSwitch Subsystem
FE
BUSN 1 BUSN N
Switch Control
2nd
Switch Subsystem 2nd
Switch Subsystem
IP Switch Unit (PSU)
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User Plane Data Flow in CS Domain
BIU
User plane
switch network AIU
A Interface
GIU
CMP OMP
UPU TCU
1
2
Control plane
switch network
Gb Interface
Abis Interface
Flow: 1->2
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User Plane Data Flow in CS Domain - Shelves
BGSN
GUIM
BCTCBPSN
GUIM
PSN
GLI
DTB/GIPI/
STDB2
CHUB
UIMCOMP
SPB/
EIPI SPB GUP2
SPB
GIPI
GLI
UIMC
User Plane Control Plane
Abis
TS Switch
ICMGPS
A
GUP2GUP2
CMP
SBCX
DTB/SDTB2/
GIPI
SGSN1
Gb
MSC 1
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User Plane Data Flow in CS Domain - Boards
BPSN
BGSN
BGSN
IPBB GUIM BIPB2 GUIM GLI PSN
GUIM GLIIPI GUIM AIPB
Abis
A
AIU
BIU
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User Plane Data Flow in PS Domain
BIU
User plane
Switching network AIU
GIU
1
CMP OMP
UPU TCU
2
Control planeSwitching network
A Interface
Gb Interface
Abis Interface
Flow: 1->2
BIU detaches data
Send to UPU for processing
Send to GIU
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User Plane Data Flow in PS Domain - Shelves
BGSN
GUIM
BCTCBPSN
GUIM
PSN
GLI
DTB/
GIPI/
STDB2
CHUB
UIMCOMP
SPB/
EIPI
SPB GUP2 SPB
GIPI
GLI
UIMC
User Plane Control Plane
Abis
TS Switch
ICM
GPS
A
GUP2GUP2
CMP
SBCX
DTB/
SDTB2/
GIPI
SGSN1
Gb
MSC 1
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AbisBPSN
BGSN
BGSN
IPBB GUIM BIPB2 GUIM GLI PSN
GUIM GLIIPGB GUIM UPPB2Gb
BIU
PCU
User Plane Data Flow in PS Domain - Boards
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Control Plane Signal Flow in CS Domain
BIU
AIU
GIU1
2
CMP OMP
3
UPU TCUUser plane
Switching network
A Interface
Gb Interface
Abis Interface
Control plane
Switching network
Flow: 1->1 Flow: 1->2
Flow: 2->3->3->2 Flow: 2->2
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Control Plane Signal Flow in CS Domain - Shelves
BGSN
GUIM
BCTCBPSN
GUIM
PSN
GLI
DTB/
GIPI/
STDB2
CHUB
UIMCOMP
SPB/
EIPI SPB GUP2
SPB
GIPI
GLI
UIMC
User Plane Control Plane
Abis
TS Switch
ICMGPS
A
GUP2GUP2
CMP
SBCX
DTB/
SDTB2/
GIPI
SGSN1
Gb
MSC 1
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BCTC
BGSN
BGSN
IPBB GUIM CHUB UIMC
IPI GUIM
Abis
A
CMP
CHUB UIMC
AIU
BIU
OMP
Control Plane Signal Flow in CS Domain - Boards
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Control Plane Signal Flow in PS Domain
BIU
AIU
GIU1
4
CMP OMP
6
UPU TCU
2
35
A Interface
Gb Interface
Abis Interface
User plane
Switching network
Control plane
Switching network
Flow: 1->1 Flow: 1->2
Flow: 2->3->3->2 Flow: 5->3->2
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Control Plane Signal Flow in PS Domain - Shelves
BGSN
GUIM
BCTCBPSN
GUIM
PSN
GLI
DTB/
GIPI/
STDB2
CHUB
UIMCOMP
SPB/EIPI
SPB GUP2 SPBGIPI
GLI
UIMC
User Plane Control Plane
Abis
TS Switch
ICMGPS
A
GUP2GUP2
CMP
SBCX
DTB/SDTB2/
GIPI
SGSN1
Gb
MSC 1
Flow: 1->1
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Control Plane Signal Flow in PS Domain - Shelves
BGSN
GUIM
BCTCBPSN
GUIM
PSN
GLI
DTB/GIPI/
STDB2
CHUB
UIMCOMP
SPB/
EIPI SPB GUP2
SPB
GIPI
GLI
UIMC
User Plane Control Plane
Abis
TS Switch
ICMGPS
A
GUP2GUP2
CMP
SBCX
DTB/SDTB2/
GIPI
SGSN1
Gb
MSC 1
Flow: 5->3->2
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Control Plane Signal Flow in PS Domain - Boards
BIU
Abis
BCTCBGSN
IPBB GUIM CHUB UIMC CMP
Flow: 1->1
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BCTCBGSN
IPGB GUIM CHUB UIMC
BIU
PCU
CMP
Gb
CHUB UIMCUPPB GUIMGUIM
GUIM IPBBBIPB
Abis
Control Plane Signal Flow in PS Domain - Boards
Flow: 5->3->2
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Contents
General Introduction
Hardware Architecture
Software Architecture
System Principle
System Dimensioning
Summary
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RCBU Configuration - BIU Unit
DTB board: NDTB=NAbisNSPB28/32
GUP2 board: NVTCD= NTRX/392
SPB2 board: NSPB2= NLAPD/512
TDM mode
GIPI board: NGIPI= Ceiling(NTRX / 2385)
GUP2 board: NGUP2 = Ceiling(NTRX/ 840)
IP over Ethernet mode
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RCBU Configuration - BIU Unit
DTB board: NDTB= NAbis/32
EIPI board: NEIPI = Ceiling ( NDTB/2 )
GUP2 board: NGUP2= Ceiling( NTRX/ 840)
IP over E1 mode
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RCBU Configuration - TC and AIU Unit
DTB board: NDTB=(NANSPB16)/32
SPB2 board: 2 pieces
GUP2 board: NTCD=NA-trunk/ (100 * 15)
TDM mode
GIPI board: NGIPI
= Ceiling(NTRX
/ 2385) GUP2 board: NGUP2 = Ceiling(NTRX/ 840)
IP over Ethernet mode
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RCBU Configuration - PCU Unit
SPB board: NSPB=NGb/32M
GUP2 board: NGUP2= NGb/ (400 * 16K * 15)
TDM mode
GIPI board: NGIPI = NGb/600M
GUP2 board: NGUP2= NGb / 100M
IP over Ethernet mode
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CLKG: 2 pieces , 1+1 backup, Mandatory
BCTC (Control Shelf) Configuration
OMP: 2 pieces, 1+1 backup, Mandatory
CHUB: 2 pieces , 1+1 backup, Mandatory
UIMC: 2 pieces , 1+1 backup, Mandatory
SBCX : 2 pieces( 1 piece is also allowed)
CMP: NCMP
=Ceiling (NTRX
/(512*2))
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UIMC: 2 pieces, 1+1 backup, Mandatory
BPSN (Packet Switch Shelf) Configuration
PSN: 2 pieces, 1+1 backup, Mandatory
CMP: it can support 1024 TRX,1+1 backup
GLI: NGLI=Ceiling (NResource-Shelf/2,1)
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Capacity Calculation (Maximum Traffic)
Full configuration (two racks)
6 CMP (1+1) 2 CPU / CMP 700k BHCA / CPU
700k*2*3= 4200k BHCA
Traffic ModelBHCA/Sub 1.1
SMS-MO+MT/Sub 1.7
LOC Upgrading/Sub 1.2
HO internal/external/Sub 0.9Mean calling time 60s
Maximum Erlang
4200K*0.22*60/3600= 15400 Erlang
Rate of BHCA
1.1/(1.1+1.7+1.2+0.99)=0.22
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Control Shelf
(BCTC)
6 CMP
Type BTS CELL TRX CSTraffic
TCH(FR)
PS Traffic(Mbps)
Capacity 343 1033 3072 8770 22272 46.25
Capacity Calculation (Example)
1 CMP process 1024 TRX
Ceiling(3072/1024)=3 CMP
1+1 Backup
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Abis Resource
(BIU Unit )
1 GIPI process 2385 TRX
Ceiling(3072/2385)=2 GIPI
4 GIPI
1+1 Backup
1 GUP2 process 840 TRX
Ceiling(3072/840)=4 GUP2
BGSN Shelf IP over Ethernet mode
8 GUP2
1+1 Backup
Capacity Calculation (Example)
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A Interface Resource
(TC and AIU Unit )
1 GIPI process 7500 ERL
Ceiling(8770/7500)=2 GIPI
4 GIPI
1+1 Backup
1 GUP2 process 6090 TCH
Ceiling(22272/6090)=4 GUP2
BGSN Shelf IP over Ethernet mode
1+1 Backup
8 GUP2
Capacity Calculation (Example)
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Gb Interface Resource
(PCU Unit)
1 GIPI process 600 Mbps
Ceiling(46.25/600)=1 GIPI
2 GIPI
1+1 Backup
1 GUP2 process 100 Mbps
2 GUP2
BGSN Shelf
Ceiling(46.25/100)=1 GUP2
1+1 Backup
IP over Ethernet mode
Capacity Calculation (Example)
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4 GLI
Packet Switching Shelf(BPSN)
1 GLI process 2 resource shelf
Ceiling(4/2)=2 GLI
1+1 Backup
4 GIPI,8 GUP2 need
4 resource shelf
Capacity Calculation (Example)
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Contents
General Introduction
Hardware Architecture
Software Architecture
System Principle
System Dimensioning
Summary
S
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Summary
Largest Capacity
15000Erl
4200K
3072TRX All - IP
Shelf
BCTC
BPSN
BGSN:BIU,AIU,GIU,UPU,TCU
D d i l fl