An IP Enabled TETRA Radio Network
Transcript of An IP Enabled TETRA Radio Network
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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 products from CDAC
Conventional Architecture
TETRA over IP
TETRA Network for Kerala Police
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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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
Home databaseVisited databaseProtocol Stack
Entire database
BS Site 2
Secure protocolcarriesdatabase updates
BS Site 3
Home databaseVisited databaseProtocol Stack
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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 products from CDAC
Conventional Architecture
TETRA over IP
TETRA Network for Kerala Police
Conclusion
B St ti Sit
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Base Station Sites
Current Installation
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Current Installation
Base Station Site
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Base Station Site
Base Station
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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