i tc

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The information contained in the file is solely property of ZTE corporation. Any kind of disclosing without permission is prohibited. ZTE University univ.zte.com.cn univ.zte.com.cn

iTC Overview


iTC Service Networking


Purposes of applying iTC in the network are: Save Transmission resources Share Transcoder resources among iBSCs Improve the utilization rate of TCU

resources Flex Ater/A interfaces provide disaster

recovery.


Interface Indices

A-interface uses the following media:

1. E1-link - 256-1 / 768-2 / 1024-3 / 1536-4

2. STM1-link – 4-1 /12-2 / 16-3 /24

A-ter interface uses the following media:

1. E1-link – 64 -1 / 192-2 / 256-3 / 384 - 4

2. STM1-link – 1-1 / 3-2 / 4 - 3 / 6-4


ZXG10 iTC System Composition


Hardware Structure of ZXG10 iTC


iTC Shelves Description


iTC Shelf Configurations

Control Shelf is configured in the second shelf of the third cabinet if needed. For one or two Cabinet iTC configurations, control shelf’s boards are distributed in other shelves. Packet Switching Shelf and Circuit Switching Shelf should be configured in the fourth and first shelves respectively.


Connection Description

Clock Distribution of Combined Cabinet


Ethernet Connections of Combined Cabinets


User Plane connections of combined cabinet (GLI)


User Plane connections of combined cabinet (TFI)


iTC External Connections


Structure of Resource Shelf


Structure of Circuit Switching Shelf


Structure of Packet Switching Shelf


Structure of Control Shelf


External Interfaces


Clock Distribution


User Plane Signaling flow


Control Plane Signaling flow


Service Networking

A-ter Interface Networking A-interface Networking


Maintenance System Networking


Configuration principles

System configuration principles for Ater interface TDM access modes are:

iTC supports 1 to 4 Rack configurations One SPB supports 128 no.7 Signaling. There are 2

SPB boards that can process 256 no.7 signaling. Resource shelf = AIU + TCU + Ater

2 Resource shelves = one PRCBU

System capacity expansion is very easy, only needs to stack PRCBU


Contd..

For Full rate Ater GUP can process 3360 voice channels.

For Half rate, Ater GUP can process 4200 voice channels.

Normally average value supported by Ater Gup is 3600 voice channels.

TC GUP supports 840 Traffic channels (14 DSP x 60)

Multiplexing ratio for cabling E1 or STM-1 Interface at Ater-interface is 1:4 for FR; 1:8 for HR.


iTC System Configuration (Ater Interface TDM)


Example to calculate no. of boards required in One PRCBU

1 PRCBU = 2 shelvesTo support 1024 Trx,At A-interface, 256 E1 required ie 8 DTBAt A-ter, 64 E1 required ie. 2 DTBTotal= 10 DTB.One TC GUP supports, 840 TCsFor 1024 TRX, 8192 TCs ie 10 GUPs At Ater- 8192/4 =2048 TCs=3 GUPsTotal =13 GUPs.


Detailed System Configuration.

iTC can have a maximum of 4 Racks in various configurations according to different situations such as Ater uses E1 or STM-1 and A-interface uses E1 or STM-1.

Integrated T-Network and Integrated IP switch are mutually inclusive in iTC configuration ie either use both or none


Detailed System Configuration

Dual Shelf iTC Stack Configuration


Single Rack Configuration (A/Ater uses E1)


Dual Rack configuration( Ater/A-interface uses E1 )

i tc

Technology

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property of zte corporation

kind of disclosing

itc overview

cabinet itc configurations

itc shelves description

itc service networking

zxg10 itc system composition