an ip enabled tetra radio network

7/27/2019 An IP Enabled TETRA Radio Network

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An IP enabled Tetra Radio Network TeCDAC 07

Welcome

Centre for Development of Advanced Computing

TRIVANDRUM


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TopicsTopics

What is TETRA

TETRA products from CDAC

Conventional Architecture

TETRA over IP

TETRA Network for Kerala Police

Conclusion


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What IsWhat Is ??

MobileStations

TETRA Network

Other TETRANetwork

ISIVoice And Data

PEI

PABX, PSTN,ISDN, PDN

GatewayDirect

Mode


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Other Features

Fast call setup Data Communication

28.8kbps, 19.2kbps (protected)

Highly secured voice & Data Commn. Multilevel authentication

wide coverage area


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TETRA TDMA

4:1 TDMA (Time Division Multiple Access)4 logical channels25 kHz carrier spacingspeech calls use one channeldata calls can use up to 4 channels (multi-slot data)

Four user channels interleavedinto one 25 kHz carrier


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TETRA Application Areas

Military Police and paramilitary forces Fire Force Railways

Communication in Rural areas Aid in emergency due to naturalcalamities

Life saving communication in coasts Public safety


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Products Vehicle Mount Radio

Handheld Radio Base Station Infrastructure Products

Software Modules Protocol Stack Encryption/Authentication DSP algorithms

TETRA Products from C-DAC


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November 2002


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November 2002

Tetra Base Station


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TETRA Foreign Contracts

Foreign contract worth 2.5 million USD

Total solution for TETRA handheld firmware

Partners in China,Korea,UK & Germany

Mass production commencedby three Chinese companies


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TETRA Infrastructure products

from CDACTETRA Base StationCentral Base Station Controller (CBSC)PSTN Gateway

Data GatewayDispatcher Authentication Centre

Analog Interface Unit Automatic Vehicle Tracking System


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Conventional NW - with Central Switch

ISIVoice

And Data

Applications

PABX, PSTN,ISDN, PDN

Mobile Stations

DirectMode

Gateway

SwMISwMI (MSC)(MSC)(Switch & Management(Switch & Management

Infrastructure)Infrastructure)

Other TETRAOther TETRANetworkNetwork


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Distributed architecture

Distributed Soft switching

No hardware required for call routingDistributed Database Fast Call set-up

Distributed intelligence

High Degree of resilience

Works in Stand-alone mode / shared mode

T i


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TopicsTopics

What is TETRA



TETRA over IP


Conclusion


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TETRA over IP

An IP Network is modular & ScalableNetwork flexibility gives best balance between

transmission costs and required resilienceCan be configured as STAR, RING or MESHCOTS (Commonly available Off the shelf)

Network components can be used.Internet driven performance improvementsGateways, CBSC, Dispatchers etc. can be located

at any point in the Network64kbps data rate / carrier Bandwidth sufficient


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TETRA over IP

Data is duplicated across the network

No requirement for central processing elements

TETRA traffic carried as IP packets

TOIP Network uses standard IP techniques such asIP Unicast (point-to-point) and IP Multicast

(point-to-multipoint)

TETRA over IP


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November 2002

TETRA over IP


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Call Set-up and Routing

TETRA Individual CallTETRA Individual Call -- uses IPuses IP UnicastUnicast

20555 Calls 20560

20560 is at @IP2

@IP1 @IP2 20560Radio Site hasIP address IP1 Radio Site has

IP address IP2TETRA Voice packets

travel as IP Packetsfrom IP1 to IP2

20555

MS1

MS2BS1 BS2


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Call Set-up and Routing

TETRA Group callTETRA Group call -- uses IP Multicastuses IP Multicast

@IP4

Talk Group 1

@IP3

@IP2

Group is @IP2@IP3@IP4

Talk Group 1

Talk Group 1

IP Multicast improves bandwidth efficiency - a Group Call only involvessites where registered Group members are registeredIP Multicast permits call traffic to be easily routed to a Dispatcher and/or

Digital Recorder.

IP N t k Di t ib t d


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IP Networks - DistributedIntelligence

CBSC

Base Station-Site 1

Home databaseVisited databaseProtocol Stack


Entire database

BS Site 2

Secure protocolcarriesdatabase updates

BS Site 3



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Architecture Options 1/4

CBSC

PSTN Gateway

X21 or G703 X21 or G703

Main Router LAN

Dispatcher

TETRABS Site

STAR Architecturemost cost-effectivemethod of linking sites

together

A hi O i 2/4


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Architecture Options 2/4

LAN

X21 or G703 X21 or G703

Router LAN

CBSC

PABX Gateway Dispatcher

MESH ArchitectureVery high NW resilience

due to alternate routing


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TopicsTopics


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TopicsTopics

What is TETRA



TETRA over IP


Conclusion

B St ti Sit


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Base Station Sites

Current Installation


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November 2002

Current Installation

Base Station Site


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November 2002

Base Station Site

Base Station


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November 2002

Base Station

ConclusionConclusion


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ConclusionConclusion

Resilience

Flexibility

Convergent technology

Continuous performance improvementsdriven by IP market

Future Proof Technology


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Thank Youhank You

an ip enabled tetra radio network

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