Beyond the TETRA Technology 1st TETRA Malaysian Conference 18th May 2005.

Beyond the TETRA TechnologyBeyond the TETRA Technology

1st TETRA Malaysian Conference18th May 2005

Beyond the TETRA Technology

Teltronic, 2005

Introduction

INTRODUCTION

NETWORK

TERMINAL

SUMMARY

Presentation overviewPresentation overview

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Introduction

What we will offer in the presentationWhat we will offer in the presentation

The main keys of flexibility, scalability and connectivity to allow choosing the best option for your TETRA network topology.

The way to provide TETRA terminals with extra added value to make easier the development of advanced applications.

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What we expect to achieveWhat we expect to achieve To open your minds towards new ways to take benefit of such a powerful technology, also being aware of its limits and the way to overcome them.

To provide the keys to you for optimal decision making in your present and future investments in TETRA products.

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The NetworkA new world of flexibility and scalability

Beyond the TETRA Technology

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Index of contents

• Introduction• Transport• Redundancy• Scalability• Connectivity

Beyond the TETRA Technology

The Network

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Introduction to the network (I)

NEBULA is the TETRA infrastructure by Teltronic. It has been designed over a star configuration topology.

NEBULA ACRONYMS:SCN: Switching Control NodeSBS: Site Base Station

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Introduction to the network (II)

TRANSPORT:Customers could already have an existing transport network and they would like to reuse it with the new TETRA system.

REDUNDANCY:The only way to guarantee the lowest service gap in case of failure of any element in the system.

SCALABILITY:Early and low-cost mechanisms to upgrade and expand the system are highly valuable.

CONNECTIVITY: The system oftenly needs to be connected to other external systems and/or applications.

A flexible topology provides the customer with different alternatives to address the main topics of every system architecture design: transport, redundancy, scalability and connectivity.

SBS

Link

SCN

SBS

SBS

IP network

Transport Redundancy

ScalabilityConnectivity

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Index of contents

• Introduction• Transport• Redundancy• Scalability• Connectivity

Beyond the TETRA Technology

The Network

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Transport (I)

Synchronous links:

BRI - PRI [ISDN]: Access through public networks.

Bandwidth BRI (Basic Rate Interface): 128 Kbps. Bandwidth PRI (Primary Rate Interface): 2 Mbps.

G.703/G.704: [E1 or T1]: Standard link in transport environments. Access to PDH, SDH, microwaves. Circuit connection to other standardised systems.

Bandwidth: 64 Kbps per slot, frame structure up to 2 Mbps.

V.35 link: Standard link in transport environments. Access to PDH, SDH, microwaves.

Bandwidth: 64 Kbps up to 2 Mbps.

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Transport (II)

Asynchronous links - Layer 2:

LAN links (Layer 2 - Ethernet links):LAN (Corporate local area networks) :

- Always through switches (instead HUB).

- Ethernet rings (Rapid Spanning tree, 802.1w).

Bandwidth: 10 Mbps, 100 Mbps, 1 Gbps.

WiFi / WiMAX:- 2.4 GHz, 5.4 GHz (with or without license) Bandwidth: From 1Mbps up to over 54Mbps.

Optical Fiber (using optical backbones):- Solutions like HyperRing.Bandwidth: 100 Mbps, 1Gbps...

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Transport (III)

WiFiConnection

SBS

Standard Office Local Area Network

Ethernet Switches

SBS

Optical Fiber

Fiber Access

Fiber Access

Ethernet Switch

70 KmLAYER2 SYSTEM ACCESS: : Ethernet connections : Wireless connections : Optical Fiber connections

SCN

SBS

Asynchronous links - Layer 2:

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Asynchronous Links - Layer 3:

IRB (Integrated Routing and Bridging): Point-to-point link between two routers through WAN connection with FR (Frame Relay).

The use of DLCI (Data Link Connection Identifier) in FR allows dividing the bandwidth for the TETRA system and corporate communications.

VPN/MPLS (Multi Protocol Labelling Switching): Using layer 2 labels it is possible to manage the QoS of the layer 3 packets.

xDSL / NetLAN: Access points distributed around the world. Depending of the bandwidth required is recommended to use NetLAN connections. These are not introducing the payload packet through the Internet world.

Transport (IV)

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Index of contents

• Introduction• Transport• Redundancy• Scalability• Connectivity

Beyond the TETRA Technology

The Network

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Redundancy (I)

Redundancy is a strong requirement for any professional communication network:

A TETRA SYSTEM MUST BE REDUNDANT on:

BSR: Base Stations.

CNC: Switching Control Node Processor (redundant by two main units).

LINKS: Must be redundant in case of a fault in transport system.

PATHS: Different paths must be considered to connect the SCN from the SBS.

Physical Connections: Cables and hardware drivers can also fail, therefore these must be duplicated.

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Redundancy strategies must be applied to any critical part within the system:

CNC

SCN (Switching Control Node)

LAN

SBS1

LAN

BSR

SNIG.703/G.704

Asynchronous

World

Ethernet Switch

Synchronous

World

SNIG.703/G.704

E1 Link

WAN RedundantE1 Link ISDN

SNI S/T

SNI S/T

BRI Link

Ethernet Switch

RedundantPhysical Connections

RedundantEthernet Switch

RedundantEthernet Switch

Redundancy (II)

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Index of contents

• Introduction• Transport• Redundancy• Scalability• Connectivity

Beyond the TETRA Technology

The Network

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Scalability

Systems must be designed to support upgrades with the minimum impact over the working network. Both software and hardware upgrades are expected to be supported.

Software upgrades (Increasing functionality):

• Background FTP to upgrade functionality.

• The system must be continuously working.

• Secondary memory bank is required.

Hardware upgrades (Expanding the network topology):

• Increasing network dimension or redundancies.

• Plug and Play.

• Hot swap connection.

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Index of contents

• Introduction• Transport• Redundancy• Scalability• Connectivity

Beyond the TETRA Technology

The Network

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General connectivity concepts in NEBULA

N2A: (NIIA) NEBULA IP Interface Access

TDP: TETRA Dispatcher Protocol

Connectivity (I)

TETRADispatcherServices

Standard IP Services(PDP TETRA Services)

TCP

UDP

TCP

UDP

Telnet FTP http smtp

N2A REGISTER AND CALL

CONTROL

MONITORING

INCLUSION / LISTENING /TERMINATION

DGNA

(Simplex, Duplex, Groupcalls, Status, SDS)

TDP

VoIP (voz) RTP RTCP

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Voice communication management (Dispatching)

SCN NEBULA

GATEWAYRDSIVoIP

VoIP (SCN RTP / RTCP)

TDP (SCN Monitoring, Calls, PTT)XML (NMS)

GATEWAYRDSI

VoIP

CNC

NMS ServerLine Dispatcher Server

FIREWALL

SNISNI

SWITCH

BackboneCorporate Network

Client SCN Line Dispatcher 1

Client SCN Line Dispatcher n

SBS NEBULA

SNI

SWITCH

FIREWALL

Client SBSLine Dispatcher 1

GATEWAYRDSIISDN

PHYSICAL CONNECTION between Line Dispatcher stations and NEBULA

Connectivity (II)

The TerminalDriving your applications to the limit

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Beyond the TETRA Technology

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Index of contents

• The role of the terminal in a system• Improving the terminal capabilities• Examples of customised scenarios

Beyond the TETRA Technology

The Terminal

?The role of the terminal in a system (I)

Which are the kind of elements normally requested to solve a complete application?

Multiple audio interfaces• Microspeaker• In-vehicle hands-free kit• 600Ω balanced interface• Audio recording output• Ambience listening mic input

Extended I/O capabilities• External PTT (foot-switched) input• Event-controlled outputs• Emergency signal input

Integration with other communication peripherals• GPS receiver• GSM transceiver• Analog radio transceiver

Data transmission & control• External access to data transmission services• Remote radio unit control protocol

MMI customised access• User logging• Shortcuts to user services• Software customisation at application level• Customised user front-ends

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?The role of the terminal in a system (II)

Is there a way to optimise these kinds of extra requirements?

…by integrating into the TETRA terminal part of those elements that normally are required for such advanced scenarios.

YES !

TETRA radio unit

Audio interface

Peripheral #1

Customised MMI

USER

APPLICATION ELEMENTSAPPLICATION ELEMENTS

External I/O

Peripheral #n

External peripherals

TETRA terminalTETRA terminal

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Index of contents

• The role of the terminal in a system• Improving the terminal capabilities• Examples of customised scenarios

Beyond the TETRA Technology

The Terminal

TETRA MS

CONTROLUNIT

GPS

PEI

GPS info SDStype 4

TETRA SwMI

LINE DISPATCHER

STATIONS

GPS info

Some ways to improve the classical AVL (Automatic Vehicle Location) solution

GPS receiver integration in TETRA terminals: Single TETRA + GPS devices.

Methods to decide about the way and the timing to send the GPS information: It also makes the application more efficient in use of system resources.

GPS information packed in smaller messages: More efficient in use of bandwidth.

USERUSER

Te

ltro

nic

, 2

00

5

TETRA + GPS (I)

TETRA + GPS (II)

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++ == Single Single terminalterminalGPSGPS

size

Shortened GPS info (less resolution)

SDS-T3 SDS-T3 8 bytes 8 bytes

Confined area GPS info

SDS-T2 SDS-T2 4 bytes 4 bytes

GPS info (*)• Latitude• Longitude• Position age• Course• Speed• Time• Position validity• GPS receiver status

Standard NMEA 0183 v2.01 RMC message

SDS-T4 SDS-T4 68 or 70 bytes (without/with TL) 68 or 70 bytes (without/with TL)

(*) some parameters can appear optionally according to the message format

mes

sage

form

at

GPS messages management strategy

• by request from the AVL control centre,• by timeout, every programmed time intervals,• by distance threshold in a programmable value,• automatic sending during emergency calls.

TETRA + GSM

Some reasons to a dual TETRA+GSM terminal

The possibility of communication for mobile users that often need to leave the home coverage area increases their level of service anywhere.

A single MMI for TETRA and GSM operation makes easier the user interaction.

A compact solution reduces complexity in installations and avoids the user managing two separate communication devices.

++ == Single Single terminalterminal

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Teltronic, 2005

Index of contents

• The role of the terminal in a system• Improving the terminal capabilities• Examples of customised scenarios

Beyond the TETRA Technology

The Terminal

Advanced vehicular configuration (I)

USUAL REQUIREMENTS

- Half-duplex and duplex voice calls.- Status and short data transmission.- Remote database and file access.- GPS-based vehicle location system.

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Advanced vehicular configuration (II)

Example: CONFIGURATION STRUCTURE

PC vehicular unitPC vehicular unit

MMI front-endMMI front-end

PTTPTT

Foot Foot switchswitch

Hands-free micHands-free mic

LoudspeakerLoudspeaker

Fist microspeakerFist microspeaker

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Motorbike adapted equipment (I)

USUAL REQUIREMENTS

- Half-duplex and duplex voice calls.- Status and short data transmission.- Outdoor operation (dust & water protection, high audio, noise cancellation).- Simplest user interaction.- GPS-based location system.

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Motorbike adapted equipment (II)

Example: CONFIGURATION STRUCTURE

Battery

PEI & audio

Helmet audio system

Outdoor speaker

PTT on handlebars

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Bus on-board equipment (I)

USUAL REQUIREMENTS

- Half-duplex and duplex voice calls.- Status and short data transmission.- Vehicle sensors transmission.- MMI integrated on driver’s dashboard.- Interaction with passenger information system.- GPS-based location system.

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Bus on-board equipment (II)

Example: CONFIGURATION STRUCTURE

- PTT- PTT- Emergency button- Emergency button- Call request- Call request

Passenger information

system

Audio interface

Bus driver’s audio system

Bus driver’s

MMI

control

PEITelemetry sensors

Billing system

Other peripherals

engine, speed, doors...Control unitControl unit

DISPLAYDISPLAY

data

TETRA MSTETRA MS

Ambience listening

microphone

Hands-free audio kit

HandsetTeltronic, 2005

Railways & underground train equipment (I)

USUAL REQUIREMENTS

- Half-duplex and duplex voice calls.- Status and short data transmission.- Dual MMI console integrated on driver’s dashboards.- Interaction with passenger information system.- Interaction with on-board train computer.- Integration of multiple communication subsystems.

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Railways & underground train equipment (II)

Example: CONFIGURATION STRUCTURE

CONTROL MODULE

VHF analog radio

TETRA radio

unit

AUDIO INTERFACE

to MMI console #n

to train’s control system

to TETRA antenna

to passenger audio system

to VHF antenna

Hands free audio systemHandset

LED indicators Auxiliary

buttons

KeypadDisplay

CONTROL MODULE

MMI MMI consoleconsole

Communications rackCommunications rack

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Railways & underground train equipment (III)

Example: INSTALLATION DETAILS

MMI MMI consoleconsole

MMI MMI consoleconsole

Communications rack Communications rack (TETRA + analog VHF)(TETRA + analog VHF)

Overview of Overview of communication communication devicesdevices

Train’s main Train’s main control systemcontrol system

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Summary

Beyond the TETRA Technology

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Thinking beyond TETRA

1 TETRA can now be considered as a mature and stable technology. There is

a lot of positive feedbacks from the real world. The TETRA toolbox is ready.

The user DOES NOT speak normally in TETRA language. We ALL (manufacturers, application developers, system integrators, network operators)

need to learn their language.

2

3toolboxtoolbox

Common Common languagelanguage

USER SATISFACTIONUSER SATISFACTION……thinkingthinking Beyond the TETRA TechnologyBeyond the TETRA Technology

www.tetramou.cwww.tetramou.comomwww.teltronic.eswww.teltronic.eswww.etsi.orgwww.etsi.org

Further information on the Web:

Thank you very much for Thank you very much for your attention!your attention!

……we will continue working to try to make your life easier.we will continue working to try to make your life easier.