1. An implementation of Distributed TETRA over IP
Erick Bourdin THALES Land & Joint Systems

2. 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.

3. Outline The basics of TETRA over IP An Open and Modular architecture
Dispatching & Recording
Gateways
Multimedia Application Programming Interface
Summary

4. The basics of TETRA over IP (ToIP) Line Switch vs IP Routing Centralised vs Distributed
Radio sites
Dispatching
Recording
Data Processing
Reference Data Base
Site Control Units
Gateway to other
Networks
IP Network (LAN, WAN, SL, etc…)
Radio sites
Dispatching
Recording
To other
Networks
Data Processing
Switching Centre

5. A typical ToIP architecture diagram
X21, G703 Frame Relay, ATM ...

6. A highly modular architecture
NMWS
PABX
gateway
RADIO SITE
Single site Network
RADIO SITE
NMWS
PABX
gateway
IP BACKBONE
Dispatcher
AVL
Play Back
NMS
Regional Network
Nation wide Network
Region 1
IP BACKBONE
Region 2
Region N

7. An open architecture IP Networking, Mobility DB distribution as well as unified TETRA stack allow the integration of multiple vendor Base Stations into a single Network
NMWS
MAMC
IP BACKBONE
PSTN
PABX
RECORDER
GSM
DISPATCHER

8. 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

9. Recording Station(s) Direct Tetra Uplane packets recording,
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 into the replay station
Access to recorded communications by all possible criteria: calling/called Pty, Talking party, Priority, localisation, date, etc ...
Replay Station
FLEET 1
Recorder
LAN ToIP
Replay Station
FLEET 2
TETRA
ToIP
NETWORK
LAN ToIP
WAN
REMOTE Player

10. 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
=> Tetra/PABX numbering scheme association,
=> Call forwarding between MS and external subscribers,
=> Group call from outside the TETRA network
=> Emergency call, pre-emption, call queuing available

11. IP DATA Gateway Provides for IP Over Tetra Mobile internet
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

12. 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
Reference Data Base
IP Network (LAN, WAN, SL, etc…)
MAPI
MAPI
MAPI
MAPI
Recording
Dispatching
Data Processing
Gateway to other
Networks

13. 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

14. Several ToIP Systems are Operational
Dunkerque Municipality Services late 2000, 3 sites, 170 Terminals,
Ecuador Armed Forces Aug 2001, 13 sites, 300 Terminals
UN Forces late 2001, 3 sites, 100 Terminals
Gibraltar Security Services (Gibtel) Sept 2002, 5 sites, 350 Terminals
French Armed forces in Senegal, D’jibouti and Tchad 2003/2004, 8 fixed sites, 3 Transp. Sites, 800 Terminals
Electricity Distribution / SCADA Areva/Sonelgaz Algeria 2004, 30 sites, 1100 Terminals
TetraStar PAMR Denmark 2004/2005, 60 sites >> about 100 sites,
Southern France Highways 2005, 70 sites,

15. 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