Automatic Person Location Technologies & Solutions with TETRA

Dr. Emanuele Algieri

International Business Development Director

Sepura

Market Requirement – APLS

• FCC E911 Mandate in the USCall centres Terminal or Network implemented solutions

50 - 100 metre accuracy for at least 67% of cases

150- 300 metre accuracy for at least 95% of cases

• EU E112 Mandate in EuropeNo defined accuracy specified !

• Many Blue Light Forces mandating APLS

Market Requirement - Public Safety

• Specifically for: -

• Safety of the police officer – ability to locate officer in an emergency situation and react accordingly

• Resource (person or vehicle) management

Solution Influencing Factors• Price

• Accuracy versus coverageRequirements differ for non emergencyVarying locations - in city, in building

• Ergonomics

• Power consumption

• Timing of solution to reach the market

• Standard solution or proprietary ?

• Can the solution be supported by TETRA ?

Network support and bandwidth requirements

Command & Control Requirements

• Effective management

• Requirements differ from AVLS

• User needs to feel unthreatened by APLS

• Updated positioning details fixed to various duties

• Linking of various systems/databases to provide officer with advance warning of possible dangers

Resource management• Know where someone is: save LIFE.• Better allocation of resources, prompt

reaction to an Emergency: save TIME.• Better Control of the fleet: save MONEY.

Location Solutions & Performance• Low accuracy, low cost solutions

Time difference of arrivalEnhanced observed time difference

• Medium accuracy, medium cost solutionsStandard GPSAssisted GPSLow signal strength GPS

• High accuracy, high cost solutionsDifferential GPSSolutions combinations

Standard GPS - medium accuracy

C&CServer

GIS orMapping

Application

GIS orMapping

Application

TETRANetwork

TETRAGateway

SDS

GPS

Data over network - Size of problem!

• Typically, position report messages could carry some or all of the following:

Date, Time, Latitude, Longitude, Altitude, Speed, Heading, Fix type, Confidence Level, Status, Fix Reason, Terminal ID, User Defined Field.

• Amount of message traffic generated by APLS systems is much larger than for AVLS

Requires sophisticated filtering at command &control

TETRA services for APLS• No specification for data amount or structure

of GPS messages

• TETRA services allow use of SDS messaging for transmission of GPS data:- EN 300 392-2: TETRA (Voice plus Data (V+D), part 2: Air

Interface, v2.3.2SDS4 and SDS-TL delivers variable length messages to

2047 bits(255 bytes)

• Working papers:-WG101161, Efficient transfer of location information over

TETRA networks, UK Home office, Oct 2001WG103020, Study into TETRA SDSWG303040, Transfer of location information Sepura (and others) presenting papers to WG3

Standardisation of location report messages and associated commands

Future of APLS & TETRA Terminals

• Technology Influenced Solutions

• Continuing integration of IC’s and components enables space saving in handsets and is an opportunity to integrate location devices like GPS.

• With the introduction of TETRA2 (2005+) there could be an opportunity for the network based location solutions as data rates increase over carriers.

• The European Galileo system should be operational by 2008 and this is supposed to perform better than GPS.

Clear Sky

Under Foliage

Wooden Building

Urban Canyon

Single Storey Brick Building

Multi Storey Concrete building

Underground?

2002 2003 2004 2005 2006 2007 2008 2010………………………….. 2015 2020 2030

High Quality Receiver

High Quality Hand Held Receiver

LSS GPS

L1 + L2 Frequency

L1, L2 + L5 Frequency(+ Galileo?)

Galileo

GPSIII(+ Galileo?)Other Sensors – e.g. Gyroscope, Accelerometers

……………

Estimation of Future Location System Performance

Sepura APLS over TETRA networks

• 2000- GPS connected to SEPURA SRP1000 for Ambleside Mountain Rescue Project

• 2002 - Remote GPS Unit demonstrated: A remote speaker microphone with built-in

GPS receiver, provides a unique solution for provision of personal location.

Sepura APLS update• This year – SRP2000 sGPS

• The worlds first fully working TETRA handportable with integrated GPS.

• Low signal strength operation for urban canyon operation.

• Offering tangible benefits by providing user safety and resource management

Conclusions• Many different location technologies available

• Technology for both location based and TETRA is rapidly changing

• Low Signal Strength GPS currently provides the best fit for public safety requirements.

• Sepura has an ongoing programme to identify solutions and bring these quickly to market

MANY THANKS

• Any Questions ?

• Contact details:-

• Dr Emanuele Algieri,

• Int. Business Dev. Director, Sepura Ltd

• +44 (0)7710 738122

• email: emanuele.algieri@sepura.co.uk