An implementation of Distributed TETRA over IP

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An implementation ofDistributed TETRA over IP

• Erick BourdinTHALES Land Joint Systems

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Abstract

• Originally developed by Thales Communications for
  TETRA networking solution, TETRA over IP now
  benefits from more than six years of experience
  in implementing TETRA networks. This paper
  describes the essentials of TETRA over IP
  technology with particular reference to the
  capability to integrate multi-vendor Base
  Stations and to accommodate third party
  applications through mechanisms of Application
  Programming Interfaces.

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Outline

• The basics of TETRA over IP
• An Open and Modular architecture
• Dispatching Recording
• Gateways
• Multimedia Application Programming Interface
• Summary

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The basics of TETRA over IP (ToIP)Line Switch
vs IP RoutingCentralised vs
Distributed
Radio sites
Dispatching
Recording
To other Networks
Data Processing
Switching Centre
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A typical ToIP architecture diagram
X21, G703Frame Relay, ATM ...
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A highly modular architecture
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An open architectureIP Networking, Mobility DB
distribution as well as unified TETRA stack allow
the integration of multiple vendor Base Stations
into a single Network
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Dispatching Workstation

• DWS seen as a TETRA subscriber
• Dynamic ITSI allocation at login
• All ongoing CALL Monitoring
• Transmits / receives SDS
• Access to DGNA
• Subscriber Localisation
• Emergency call
• Dispatcher profiles
• Internal Tetra voice coding

ITSI Disp1
ITSI Disp2
FLEET 1
LAN
TETRA ToIP NETWORK
ITSI Disp3
ITSI Disp4
FLEET 2
ToIP
LAN
WAN
ITSI Disp5
REMOTE DISPATCHER
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Recording Station(s)
Recorder

• Direct Tetra Uplane packets recording,
• Full Call data (CDR) storage, including TPIs,
  localisation,
• Recorder database administration
• Recorders by fleet architecture
• Multiple replay stations capability
• Tetra voice codec embedded intothe replay
  station
• Access to recorded communications by all possible
  criteria calling/called Pty, Talking party,
  Priority, localisation, date, etc ...

Replay Station
FLEET 1
Recorder
ReplayStation
LAN ToIP
FLEET 2
TETRA ToIP NETWORK
LAN ToIP
WAN
REMOTE Player
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Gateways - PABX, PSTN, SDS, ...

• In a TETRA over IP network
• A gateway is seen as a Base Station
• Gateways can be located anywhere in the network
• GW subscribers, PABX subscribers, Dispatchers,
  etc... are processed as radio subscribers
• TETRA over IP provides several benefits
• gt Tetra/PABX numbering scheme association,
• gt Call forwarding between MS and external
  subscribers,
• gt Group call from outside the TETRA network
• gt Emergency call, pre-emption, call queuing
  available

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IP DATA Gateway
Mail server

• Provides for IP Over Tetra
• Mobile internet
• IP address migration
• IP/ITSI management
• More than a simple client / server both way
  connection

TETRA ToIP NETWORK
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Multimedia Application Programming Interface
Radio sites

• MAPI is the foundation of Tetra Over IP
  applications
• Dispatchers,
• Recorder,
• Gateway,
• AVL,
• C2...
• MAPI provides access to the TETRA services for
  third party applications

Base station Control Units
ReferenceData Base
IP Network (LAN, WAN, SL, etc)
MAPI
MAPI
MAPI
MAPI
Recording
Gatewayto other Networks
Dispatching
DataProcessing
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MultiMedia Application Programming Interface

• MAPI
• Client / server connection (login, logout,)
• Voice services (Individual call, Group call)
• Data transfers with terminals (SDS)
• Tetra supplementary services
• Dynamic group assignment,
• Priority management,
• Emergency call,
• Integrated ToIP digital recording Re-play...
• Network management oriented services
• Call data records acquisition,
• Faults reports,

• MAPI is the foundation of Tetra Over IP
  applications
• Dispatchers,
• Recorder,
• Gateway,
• AVL,
• C2...
• MAPI provides access to the TETRA services for
  third party applications

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Several ToIP Systems are Operational

• Dunkerque Municipality Serviceslate 2000, 3
  sites, 170 Terminals,
• Ecuador Armed ForcesAug 2001, 13 sites, 300
  Terminals
• UN Forceslate 2001, 3 sites, 100 Terminals
• Gibraltar Security Services (Gibtel)Sept 2002, 5
  sites, 350 Terminals
• French Armed forces in Senegal, Djibouti and
  Tchad2003/2004, 8 fixed sites, 3 Transp. Sites,
  800 Terminals
• Electricity Distribution / SCADA Areva/Sonelgaz
  Algeria2004, 30 sites, 1100 Terminals
• TetraStar PAMR Denmark2004/2005, 60 sites gtgt
  about 100 sites,
• Southern France Highways 2005, 70 sites,

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Conclusion

• TETRA over IP is a field proven architecture
• TETRA over IP is an open platform for system
  integration
• TETRA over IP is the right combination of state
  of the art mobile communication and computer
  technologies