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

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.

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

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

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

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

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

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

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

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

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

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

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

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,

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