An implementation ofDistributed TETRA over IP

Erick BourdinTHALES Land & Joint Systems

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

Switching Centre

Dispatching

Recording

Data Processing

To otherNetworks

Radio sites

Dispatching Recording DataProcessing

ReferenceData Base

Site Control Units

Gatewayto other

Networks

IP Network (LAN, WAN, SL, etc…)

A typical ToIP architecture diagram

X21, G703Frame Relay, ATM ...

A highly modular architecture

NMWS

PABXgateway

RADIO SITE

Single site Network

RADIO SITERADIO SITERADIO SITE

NMWS

PABX gateway

NMWS

IP BACKBONE

Dispatcher

Dispatcher

AVL Play Back

NMS Regional Network

Nation wide Network

Region 1

IP BACKBONE

Region 2

Region N

PSTN PABX

RECORDER

GSM

DISPATCHER

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

NMWS

MAMC

IP BACKBONE

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

LAN

ITSI Disp1 ITSI Disp2

FL

EE

T 1

ITSI Disp3 ITSI Disp4

FL

EE

T 2

LAN

TETRAToIP

NETWORK ToIP

ITSI Disp5

REMOTE DISPATCHER

WAN

Recording Station(s)

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

FL

EE

T 1

TETRAToIP

NETWORK

LAN ToIP

REMOTE Player

WAN

Recorder

ReplayStation

FL

EE

T 2

LAN ToIP

Recorder

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

• IP address migration

• IP/ITSI management

• More than a “simple” client / server : both way connection

TETRAToIP

NETWORK

Mail server

Multimedia Application Programming Interface

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

Radio sites

Dispatching Recording DataProcessing

ReferenceData Base

Base station Control Units

Gatewayto other

Networks

IP Network (LAN, WAN, SL, etc…)

MAPI MAPI

MAPI

MAPI

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