ZXG10 iBSC Introduction

Contents

• General Introduction• Hardware Architecture

• System Principle

• Connectivity and signal flow

• Summary

Physical Indices

All-IP Enhanced iBSC Physical Indices

Index ZTE

Dimension (H*D*W) (mm) 2,000 * 800 * 600

Weight<270Kg(1 rack)<540Kg(2 rack)

Power Consumption (All IP Enhance iBSC )

ALL E1:2,558W/1 rack, 3,868W/2 rackALL IP: 2,542W/1 rack,3,808W/2 rack

Power Supply -48VDC (-40VDC ~ -57VDC)

Working TemperatureLong-term:0°C~40°C.

Short-term: <-5°C~45<°C.

Relative HumidityLong-term: 20%~90%.

Short-term: 5%~95%.

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

Number of Support TRX 3,072

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-1 、 E1

Contents General Introduction

Hardware Architecture System Principle Connectivity and signal flow Summary

iBSC Structure - Shelves

(BPSN)Switch Shelf

(BGSN)Resource Shelf

(BCTC)Control Shelf

(BGSN)Resource Shelf

Control Shelf (BCTC)

System global operation & maintenance

Control plane processing

Control plane Ethernet switching

Resource Shelf (BGSN)

System access

Service processing subsystem

Switch Shelf (BPSN)

Large-capacity non-blocking IP switching platform

• BACKPLANE OF CONTROL CENTER (BCTC) :- Control shelf is the control core of ZTE BSC which manage and control the whole system, process control signaling, perform operation and maintenance, and provide global clock for external synchronization function. Each BSC must be configured with one control shelf.• BACKPLANE GIGA UNIVERSAL SERVICE NETWORK(BGSN) :- Resource shelf hold various services processing board for system access. It can be configured with Abis interface unit, Ater interface unit, A-interface unit.• BACKPLANE OF PACKET SWITCHING NETWORK (BPSN):- Packet shelf provide the IP switching function for all user plane signal with high speed link.

Contents General Introduction Hardware Architecture

System Principle Connectivity and signal flow Summary

iBSC System Architecture

DTB GUIM

SBCX

SPB

SPB

CHUB

EIPISDTB

GUP

DTB

CMPPSNU

IMC

GUIM

SDTB

OMP

CLKG

GLI

GLI

…

SwitchingShelf

Resource Shelf

ControlShelf

ResourceShelf

Control FlowData Flow

UIMC

GUP

Board Name

Full Name Configuration Principle Functions Backup

OMP Operation and Maintenance Processing Board

1 pair per BCTCProvide 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 gather

1+1

ICM Integrated Clock Module 1 pair per iBSC Provide system clock 1+1

UIMCUniversal Interface Module for Control plane

1 pair per BCTC Signaling switching center of the BCTC 1+1

SBCXX86 Single Board Computer

2 per iBSC Provide OMM function 1+1

Main BCTC boards layout:(Global boards include SBCX, OMP, ICM,

CHUB are configured in the main BCTC)

Main BCTC boards layout:(Global boards include SBCX, OMP, ICM,

CHUB are configured in the main BCTC)

Normal BCTC boards layout:Normal BCTC boards layout:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

Rear B

oard

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

FrontB

oard

Control Shelf

BCTC

CMP

CMP

CMP

CMP

SBCX

SBCX

RSVB

RSVB

UIMC

UIMC

RUIM2

RUIM3

OMP

OMP

RMPB

RMPB

ICM

ICM

RCKG1

RCKG2

RCHB1

RCHB2

CHUB

CHUB

iBSC Shelf - BCTC

UNIVERSAL INTERFACE MODULE FOR CONTROL PLANE(UIMC 1+1) :

Provide Ethernet switching in the control shelf, and manage the control shelf.

Provide internal user plane GE interface to cascade UIMC with CHUB in control self.

Provide the clock driven function in the control shelf.

The external data from other boards enters the UIMC for switching and it sent to the target board.

CONTROL PLANE HUB (CHUB 1+1):

CHUB along with UIMC/UIMU/GUIM is extend the data flow of the system control plane in I BSC.

Exchange of control signal within all the shelf.

The data of control plane from all the shelves are sent to Ethernet switching unit on CHUB. The data is then sent to the UIMC through the internal GE interface and the distribute to the Resource Control Boards (RCB) and vice versa.

OPERATION AND MAINTENANCE PROCESSING UNIT (OMP 1+1) :

Implement all the operation and maintenance process, monitor and manage the boards.

It connects with OMM through 100Mbps of Ethernet.

In OMP there are 2 CPU CPU-A having hard disk of 40G basically for O&M processing. CPU-B also known as Routing Process Unit (RPU) used for call

routing protocol.

CLOCK GENERATOR BOARD (CLKG 1+1) :

Provide system clock and external synchronization. It extract clock reference through A-interface and give multiple timing reference signal to the interface unit.

Perform clock loss alarming and deterioration judgment for the interrupted reference

Provide active/standby switching.

Clock o/p after balance-driven then distributed to UIMU/GUIM through system clock cable and to UIMC through the backplane PCB.

SYSTEM CLOCK CABLE :

X86 SINGLE BOARD COMPUTER (SBCX 1+1):

SBCX is basically a server which work as memory controller and main storage unit. All the dates and their s/w for all the interface unit with OMP data processing are stored in this main storage unit.

Provide 3 FE interface, 2 GE interface, USB interface also having peripheral device interface like Keyboard and mouse.

SBCX have CPU with controller and having two hard disk of 80G for data storage.

CONTROL MAIN PROCESSING BOARD (CMP 1+1) :

• Implement Packet Switching and Circuit Switching, services control management and resource management.

• There are independent two CPU on the board, CPU_A and CPU_B. Each CPU provide control plane FE interface, with FE interface for communication of active /standby, and RS232/485 serial port for the communication with other unit.

• CPU_A is the main control function of the board.

ZTE BSC having maximum carrier capacity of 2048 trx with max traffic of 15000 Erlang.One CMP board capacity is 5000 Erlang.

CMP board require for 15000 Erlang traffic = 3 (15000/5000)

Total 3 CMP board require for 15000Er traffic with 3 redundant (1+1), so total of 6 CMP boards.

Intra-Shelf Connection – BCTC

CHUB

CMP

UIMC

OMP

CLKG/ICM

Control shelf

External public network

UIMC

Packet switching shelf

GUIM

Gigabit resource shelf

DTB/SDTB/SDTB2

8 K reference8K/16M/PP2S

Ethernet bus

HUB

SBCX

Board Name Full NameConfiguration

PrincipleFunctions Backup

GUIM GE Universal Interface Module

1 pair per BGSNUsed for BGSN interface shelf internal switching

1+1

GIPI Gigabit IP Interface Provide 1 GE or 4 FE Provide GE/FE interface 1+1

GUP2 GSM Universal Processing 2

Any slot except slots 9, 10, 1, and 17

Abis Interface Processing Board 2(BIPB2) , A-Interface Processing Board (AIPB) , User Plane Processing Board 2(UPPB2) , Dual Rate Transcoder Board 2(DRTB2)

-

DTB Digital Trunk BoardProvide 32 E1 interfaces

Provide E1 interfaces. -

Main BGSN boards layout:(Global boards include GIPI,GUP2,

SPB2,DTB,SDTB2 are configured in the

main BGSN)

Main BGSN boards layout:(Global boards include GIPI,GUP2,

SPB2,DTB,SDTB2 are configured in the

main BGSN)

Normal BGSN boards layout:Normal BGSN boards layout:

RGUM1

RDTB

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

Rear B

oard

SPB2

GUIM

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

Front B

oard

Gigabit Resource Shelf

BGSN

DTB

GUIM

RGUM2

EIPI

GUP2

RSPB

GUP2

RSPB

RDTB

SPB2

SPB2

RSPB

GUP2

DTB

iBSC Shelf - BGSN

Board Name Full Name Configuration Principle Functions Backup

SDTB2SONET Digital Trunk Board 2

Provides 2 STM-1 interfaces

Used for access channelized STM-1 interface

1+1

SPB2Signaling Processing Board 2

Provides 16 E1 interfaces

LAPD processing board 2 (LAPD2), signaling processing board 2 (SPB2), and Gb interface processing board 2 (GIPB2)

-

EIPI E1 IP Interface Every 2 DTB with 1 EIPI.Provides E1/T1-based IP access, which is realized by EIPI working together with DTB

-

iBSC Shelf - BGSN

GIGABIT UNIVERSAL INTERFACE MODULE (GUIM 1+1)

• Provide control plane and user plane Ethernet switching in gigabit resource shelf, circuit domain timeslot switching, gigabit resource shelf management, also provide external interface for shelf.

• Provide clock driving function to all boards in gigabit resource shelf.

• The external data from the boards of the shelf enter to Ethernet switching and TS switching domain for switching and is then sent to the destination board.

SONET DIGITAL TRUNK BOARD (SDTB2 1+1) :

• Provide two 155Mbps STM-1 interface.

• Provide an access processing capacity of 126E1.

• It receives the clock from the system clock board and provide the reference clock signal to the STM-1 for the synchronization.

• It receives the STM-1 optical data from line side and then sent to the circuit switching for the switching, from where it sent to GUIM board and vice versa.

One SDTB2 can support = 126E1 Abis interface (2xSTM-1).

Abis E1 require for 2048 TRX BSC = 170E1(2048trx/12trx per E1). = 340E1 for Abis Protection(170x2).

STDB2 requirement for BSC = 3 (340/126 E1 per STDB2 = 2.7).

STDB2 with 1+1 redundancy = 3x2 = 6 No. of Board.

E1 IP INTERFACE BOARD (EIPI 1+0) :

• EIPI board provides E1 based IP access. It is basically E1 to IP payload and vice versa. It works together with SDTB2 board, two EIPI boards are connected with one SDTB2 board to provide 2 x 63E1 interface.

• The interface unit access HW data, and sends the data to HSP sub card. After being processed by HSP protocol, the data is sent to service processing unit where it get distributed to user plane and control plane. The user plane data is sent to GUP2 for processing via user plane switching network and the control plane data is sent to CMP for processing via control plane switching network.

One EIPI board have capacity of 63E1 interface.

EIPI board works together with SDTB2 board for the E1 to IP payload and vice versa.

One SDTB2 board have 2x STM-1 i.e (63E1x2 = 126E1)

So to support one SDTB2 board we require two EIPI board i.e (2x63E1 interface = 126E1 interface for E1 to IP payload and vice versa).

GSM UNIVERSAL PROCESSING BOARD (GUP2 1+0)- LOGICAL NAME (BIPB2):

• GUP2 board logically can be used in different ways, if we are using in process of Abis then it’s logical name is ABIS INTERFACE PROCESSING BOARD (BIPB2).

• At STM-1 interface or E1 interface, the CS and PS service from BTS are switched through circuit switching network of GUIM board. The 20ms TRU frames or (PD frame) are found out and it converts into IP packets and then sent to the target board through GUIM.

GUP2 when used as BIPB2 = 15 DSP (Digital Signal Processor) Capacity of each DSP = 28 TRX.

TRX capacity of one BIPB2 board = 420 TRX (15DSP x 28 TRX).

Total TRX capacity of BSC = 2048 TRX.

BIPB2 board require in BSC = 5 ( 2048TRX/420TRX = 4.8).

So, number of BIPB2 board in BSC is 5 with 1+0. Redundancy can be possible with expansion.

GSM UNIVERSAL PROCESSING BOARD (GUP2 1+0)- LOGICAL NAME (TIPB2):

• GUP2 board logically can be used in different ways, if we are using in process of Ater then it’s logical name is ATER INTERFACE PROCESSING BOARD (TIPB2).

• When used as TIPB2, the user plane data from GUIM is given to DSP through Ethernet switching unit, convert to TDM data and then sent to target board through circuit switching.

GUP2 when used as TIPB2 = 15 DSP (Digital Signal Processor) Capacity of each DSP = 992 TCH.TCH capacity of one TIPB2 board = 14880 TCH (15DSP x 992TCH).Number of sites with 2048 TRX = 170 Sites ( 2048TRX/12TRX) Assuming 4+4+4 configuration.One 2048 TRX BSC = 11730 Full Rate TCH (170Sites x 69TS)Assuming normal condition, one site = 69TCH{96TS-3[6PDCH(3Fix+3Sw) + 1BCCH(1TS) + 2SDCCH(2TS)]}.Assuming 30% AMR HR = 15249 FR+HR TCH (11730 + 3519).Assuming 80% utilization of BSC = 12200 FR + HR TCH.GUP2(TIPB2) require = 1Nos. (12200TCH/14880TCH= 0.9)So number of TIPB2 board in BSC with 1+1 redundancy = 2 Nos.

SDTB2(Ater) board is used with GUP2(TIPB2) to process TCH on Ater interface.One SDTB2 can support = 2 STM-1 (Optical).SDTB2 can support = 15120 channels of 16kbps on Ater IF (2 x 63E1 x 30 x 4).GUP2(TIPB2) traffic capacity = 14880 TCH.

SDTB2 board require = 1 Nos. (14880TCH/15120TCS=0.9)

So, number of SDTB2 board require with 1+1 redundancy = 2 Nos.

GSM UNIVERSAL PROCESSING BOARD (GUP2 1+0)- LOGICAL NAME (UPPB2):

• GUP2 board logically can be used in different ways, if we are using in process of Gb then it’s logical name is USER PLANE PROCESSING BOARD (UPPB2).

• When used as UPPB2, the user plane data from GUIM board access the FE/GE interface and then it is given to DSP through Ethernet switching unit.DSP perform some user plane processing and then switches the data to SPB2 board through user plane GE interface.

GUP2 when used as UPPB2 = 600 Cells (15DSP x 40 Cells). Capacity of each DSP = 40 Cells.GUP2(UPPB2) can support = 3600 PDCH Simultaneously. [600Cells x 6(3Fix + 3Sw)].One 2048 TRX capacity BSC = 170 sites(2048TRX/12TRX). Assuming 4+4+4 configuration.170 Sites per BSC = 510 Sector ( 170sitesx 3sectors/site).510 Sectors per BSC = 3060 PDCH [ 510Sectors x 6(3Fix + 3Sw)].

GUP2(UPPB2) require per BSC = 1 Nos. (3060/3600PDCH = 0.9).So, number of GUP2(UPPB2) require with 1+1 redundancy = 2 Nos.

SIGNALING PROCESSING BOARD (SPB2 1+0):

• SPB2 board can be used for LAPD processing board. LAPD signal from BTS is access by SDTB2 board and switched to LAPD board through the circuit switching network on UIMC/UIMU or in gigabit resource shelf through GUIM where it perform LAPD processing.

• When SPB2 is used as signal processing board, it process MTP2 and X.25 protocol and extract 8k synchronization clock from the line and transmit it through cable to the CLKG.

• When SPB2 is used as Gb interface processing board, it perform Gb interface function.

• It provide physical 16xE1 external interface.

BSC Gb LINK CALCULATION:Number of TRX in BSC = 2048 TRXNumber of Sites in BSC = 137 (2048TRX/15TRX) Assuming 5+5+5 configuration.PDCH for one site = 18 [3 sector x 6 PDCH(3Fix + 3Sw)].

BW require for PDCH of 1 site = 1152 (18 x 64kbps BW/PDCH TS).

Total BW require for BSC = 157286(1152BW/site x 137 sites).

E1 require for PDCH BW = 77(157.29Mbps/2.048Mbps per E1).

Assuming 10% PDCH using simultaneously = 8E1[10% of 77E1(100%)]E1 requirement can be increase as per the Gb link % utilization observed at SGSN.(80%).

GE IP INTERFACE BOARD (GIPI 1+1) :

• GIPI board provide IP interface between ZTE iBSC and BTS,SGSN and MSC/MGW. Each GIPI provide GE interface.

• When used for Abis interface it functional work is Gigabit IP Interface Board (IPBB).

• The interface unit access the date and then it send to service processing unit where the user plane data is sent to GUP2 for processing and control plane date is sent to CMP.

Intra-Shelf Connection – BGSN

GUIMGUP2 GUP2

STM-1

Gigabit resource

shelf

GLI

Packet switching shelf

Control shelf

CLKG/ICMCHUB

E1 FE

SDTB2 DTB SPB2 GIPI

E1

RUIM2

RUIM3

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

Rear B

oard

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

Front B

oard

Packet Switching Shelf

BPSN

GLI

GLI

CMP

CMP

CMP

CMP

Board Name Full Name Configuration Principle Functions Backup

PSNPacket Switching Network

1 pair per BPSNProvides 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 traffic management

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 plane

1 pair per BPSNProvides signaling switching in BPSN

1+1

Main BPSN boards layout:(Global boards include PSN, GLI, CMP

are configured in the main BCTC)

Main BPSN boards layout:(Global boards include PSN, GLI, CMP

are configured in the main BCTC)

Normal BPSN boards layout:Normal BPSN boards layout:

iBSC Shelf - BPSN

GIGABIT LINE INTERFACE BOARD(GLI 1+1) :

• GLI is GE interface board which is connected with GUIM of both the resource shelf.

• Implement function such as physical layer adaption, IP packet check, transfer management and traffic management.

• GLI has a processing capacity of 2.5Gbps for process and transfer.

• Data sent from GUIM through optical fiber to switching interface is sent to service processing unit and then sent to PSN for high speed data switching process.

PACKET SWITCHING NETWORK (PSN 1+1):

• PSN supports bi-directional user data switching at the rate of 40Gbps in each direction.

• Implement 1+1 load sharing.

• Data from GLI is sent to the matrix switching unit of PSN through backplane and after processing the data with high speed again it sent back to the target GLI board.

Intra-Shelf Connection –BPSN

PSN UIMC

GLI GLI

GUIM GUIM

CHUB

CLKG/ICM

Packet Switching Shelf Control Shelf

Gigabit Resource Shelf Gigabit Resource Shelf

Optical fiber

……....

FE

Existing iBSC rack structure

Microsoft Office Excel 97-2003 Worksheet

Contents

General Introduction System Principle Connectivity and signal flow Summary

iBSC - Connection Between Shelves

Clock distribution cable and line clock extracting cable

Control plane Ethernet cable

User plane fiber

Monitoring cable

Clock Extracting and Distribution

UI

MC

OMP

ICM

CHUB

Power distribution plug-in box

BGSN

BGSN

BCTC

BPSN

Fan plug-in box

GUI

M

GUI

M

UIMC

Clock reference

The ICM board can get the BITS clock reference

or obtain the clock reference from GPS module.

Clock distribution

ICM － > GUIM/UIMC

GUIM/UIMC － > slots of each shelf

Control Plane Ethernet Connections

GUI

M

UI

MC

OMP

ICM

CHUB

GUI

M

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

User Plane Connections

GUI

M

UI

MC

OMP

ICM

CHUB

GUI

M

UI

MC

GLI

Power distribution plug-in box

Fan plug-in box

BGSN

BGSN

BCTC

BPSN

User Plane interconnection

GLI < － > GUIM

Fiber optic cables are used for the connections

between GLI and GUIMs in BGSN

Monitoring Circuit Connections

Sensor

GUI

M

UI

MC

OMP

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

Power distribution plug-in box < － > Fan plug-in

box

Power distribution plug-in box < － > Cabinet-top

fan

Monitoring of PWRD boardsOMP < － > PWRD in power plug-in box

Monitoring of external environment

Power distribution plug-in box < － > Sensor

Flow in CS Domain - Boards

Flow in PS Domain - Boards

N7 signaling - Boards

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