LUTECE Localisation d urgence de Telephone cellulaire Airborne Emergency Location of GSM mobiles

Transcription

1 LUTECE Localisation d urgence de Telephone cellulaire Airborne Emergency Location of GSM mobiles RNRT Project Duration ; 01/11/2001 to 01/07/2004 P.MORGAND

2 SUMMARY Goals LUTECE : Concept Principle Add value Critical points Agorithms and End users context Trials and proof of concept Demonstrator and evaluation 2

3 LUTECE GOALS Help to the rescue teams in emergency rescue People unconscious / injured under snow after avalanches in a desert mountain area victim of crash plane Mountain safety 28 January 2004 Surveillance of mountaineers or free skiers in case of quick weather evolution or avalanche risks

4 LUTECE CONCEPT 1 LUTECE demonstrator, with a double system onboard the helicopter, will allow to: awake the mobile in idle mode with a "BTS" simulator ensuring network functions intercept the mobile answers to the "BTS " simulator in order to locate the mobile phone deliver the elevation and azimuth angles to the pilot BCCH RACH θ This equipment will work in coverage limit or out of network coverage 4

5 OBJECTIVES LUTECE CONCEPT 2 intercept uplinks bursts during the helicopter moving until the point of interest Homing function estimate continuously the DOA and supply : azimuth and elevation angles synchronisation bursts BS simulator v 28 January 2004 access bursts A N T E N N A Location system (t) θ(t) (t), θ(t) : Azimut et site Antenne sur helicoptère

6 Frequency Broadcast Channel Simulator concept Deliver alternatively two different FBC Intercept RACH bursts transmitted by the handsets present in the area in order to start a location updating Optional : Paging on FBC of one or two IMSI 6

7 LOCATION ALGORITHMS L Signals reçeived by the N sensors Détection synchronisation with d(t) t k Estimation.. DOA With d(t) θ (t ) mk and m (t k ) 7 Detection and burst synchronization Two levels burst power detection on the raw datas correlation on the selected burst with the training sequence Synchronization with interpolation on the training sequence Get the best time of arrival on the sensors MUSIC on the training sequence and extension on the total burst Use the time of arrival t k on the sensors Use the training sequence Atitude helicopter correction ( azimut, bank and elevation) Deliver to the pilot the azimuth and elevation angles of the handsets k =1,... L d(t) : Training sequence

8 LUTECE Add value LUTECE allows a great detection range compared to personal existing system ( ARVA : meters ) Classical GSM range : 35 kms ( campaign cell ) Limited by relief, human body, snow,. The range expected is ~= 1 km System give a high view to the pilot compared to the personal existing system (ARVA) Extension to a pedestrian system and/or a car system as ramtrack ( in development ) No more cost for the users ( classical GSM phone) 8

9 Constraints System fully compatible with ETSI standard 3 GPP: GSM phase 1/2/2+ and extension analysis to UMTS complementary function of the location techniques by the network (ETSI TS ) System respect the rules of privacy The location function will be possible with the authorization of the concerned people Recommendation by the city hall and/or ski resorts People must put mobiles in idle mode IMSI confidentiality NO EXTRACTION 9

10 CRITICAL POINTS Mobile location : by antenna on board helicopter with a few sensors with coupling between sensors multi path, scattering context sources under snow with spreading Propagation with heterogeneous layers of different kind of snows needs to develop a propagation model valid in the bandwidth 900 MHz to 2 GHz. 10 Antenna and receivers dual mode : GSM and DCS Definition of a "Base Station" simulator All these critical points will give some new result publications and patents

11 POSITION ACCURACY USEFUL TO THE END USERS Bias of measurement Error of measurement 1 1.8m Altitude flight 100m 50m 30m 10m Acceptable error < +-1m Unacceptable Bias sources : multipath 28 January 2004 spreading helicopter position

12 03/2003: PROOF OF CONCEPT AVORIAZ TRIALS PROOF OF LOCATION CONCEPT ABSTRACT 12

13 13 AVORIAZ TRIAL AREA 03/2003

14 GOALS OF THE AVORIAZ TRIALS Goals of the TRIALS : Get raw data on the following items Losses in stratified snow and under avalanches (propagation model ) Type I Snow parameters estimations under avalanches (propagation model ) Type II Location with people under snow and under avalanche Type III Near and far field location, separation capacity versus distance,... Type IV 14

15 Receivers and location system PATCH antenna SMART AIR data Analysis and records Azimuth estimation Location computer + a LASER SYSTEM : Azimuth, elevation, distance measurements antenna - handset Synchronization criterion Elevation estimation 15

16 Trial type III : location Location with Frequency Broadcast channel + Mobile paging + jamming signal The rescuer was laid on the ground with a mobile on the chest back on the ground face on the ground lying on one's side GSM network level : -80 dbm VHF 174 MHz Security phone Receivers Frequency Broadcast channel Simulator (FBCS) < 1 m Snow AA Section A 1 m Snow 1.5 m Snow A with or without paging DCS/GSM jammer 16

17 FBCS Concept : Validation on site DCS / GSM network Handset answers on a two Frequency Broadcast Channel Simulator (FBCS) Handset 8 RACH bursts 8 RACH bursts GSM/DCS Jammer FBCS Location equipment GSM network level 80dBm 17

18 Trial type III : location Trials with a rescuer using a GSM mobile Access chimney open for photos Trials with only a GSM mobile phone Access chimney open for photos 18

19 Rescuer under snow : Results Laser measurements on snow surface : Azimuth +10 Elevation -14 Distance 37 m Estimation under snow : Azimuth +10 Elevation Distance 37.4 m Face on the ground Lying on one's side 19

20 Trials type IV - Avalanche trigerring Goals : Losses and location measurements before and after avalanche Antenna Receivers and recorder Z= 8 m D = 25 / 30m Z= 4 m c d b Handset answering simulator Avalanche area The antennas a,b,c,d have been moved for the avalanche realisation a 20

21 Trial type IV - Trig of the Avalanche 1 man 21

22 Trial type IV - Results After avalanche Laser measurements on snow surface : Azimuth -10 Elevation - 5 Distance 26 m Estimation under snow : Azimuth - 10 Elevation -6 Distance 26 m On snow Under snow 0.7m / Ground 2.5m 22

23 TRIAL CONCLUSIONS Detection and location under 1m of snow are ensured Statistics : 90 % of people are buried under less than one meter of snow Detection and location under avalanche are validated No spreading propagation was noticed during the trials The location measurements have showed that Azimut and Elevation average errors are less than 2 degrees Location measurement errors have SAME MAGNITUDE ORDER than mobile and antenna position errors by the LASER system measurements 23

24 Antennas on board Transmission antenna 500 x 500 mm Reception antenna 800 x 800 mm LUTECE Next step Location from an airborne : April

25 TRANCEIVER Antenna 5 ELEMENTS GSM/DCS antenna Beam pattern *50 mm 25

26 RECEIVER Antenna GSM/DCS Antenna : 5 ELEMENTS 80 cm 32 cm 29,2 cm Possible beam pattern of location or

27 RF equipment and location computer Aspect Remote control. Frequency Broadcast channel simulator RF Amplifiers Receivers calibration and jamming signal 5 Receivers RF Equipment RACK 19 4U Location computer Rack 19 '' 3 U 27

28 PILOT VISUALIZATION Pocket PC 4 Contrasts ( Day/night) 2 visualizations Azimuth and elevation Pilot File replay 28

29 NEXT FUTURE POSSIBLE NEW FEATURES Radio extension UMTS,TETRA, THURAYA,. Search and Rescue extensions Inshore / offshore earthquake and collapse of houses Security extensions Surveillance borders 29

30 30 END

31 LUTECE TASKS LUTECE Specifications 11/ 2001 Antennas Simulator. BTS Location system Algorithms and propagation system Trials specifications Acceptance tests Statics trials EVALUATION (CH) June 2004 Helicopter trials April 2004 Setting up Hélicoptère Today 31

32 TASKS responsibilities SP 1 : Management and broadcast SP2 : Requirements and performances of LUTECE ( ANENA, MBH, REGA ) SP 3 : Location algorithms GSM, UMTS and propagation model ( THALES, Météo France: CEN, U RENNES,.) SP 4 : GSM/DCS Base Station simulator ( CEGETEL, THALES,.) THALES CEGETEL SUPELEC ETSA SP 5 : Demonstrator THALES ( U LIMOGES, ETSA, THALES ) SP 6 : Trials MBH ( U LIMOGES, ETSA, THALES ) SP 7 : Evaluation REGA (CH ) ( U LIMOGES, ETSA, THALES ) 32

33 Demonstrator block diagram FBC Simulator and finding system GPS Emetteur /Recepteur FBC simulator recepteurs Simulateur SSB Handset alert FI 1.5 MHz Paging on IMSI Num érisation IQ 1.2 MHz i/o i/o PCI bus Finding system plateforme NT4 Location: elevation and bearing measurements Operator display unit CPU Carte vidéo 33

34 CHAMONIX trials Goals : Get some knowledge about Losses in the snow Spreading propagation Possible range in snow Chamonix : Brevent mountain between 04/03/2002 to 08/03/2002 Partners: Thales, U Rennes, Cegetel, Rescuers With the help of ski station of Brevent 34

35 35 CHAMONIX TRIALS Area trials

36 03/2002 :FIRST RESULTS Losses Measured on site: 10 à 15 db in snow of weight 250 to 330 kg / m 3 and < 1 m depth snow losses < 2 db at 900 MHz snow losses < 6 db at 1800 MHz Ground effect : -10 db Evaluation in anechoic room 25 db at 900 MHz with a total mask by a man 20 db at 1800 MHz with a total mask by a man Alert of handset phone buried beneath the snow Call by GSM network is level OK : -under 85 dbm 0.8 m of snow Handset limit level of reception : -102 dbm 36