More Precise Locations for Mobile 999 Calls

Transcription

1 More Precise Locations for Mobile 999 Calls 12 December Cambridge Wireless Limited 1

2 UK Emergency Service 999/112 call handling : Voice + Location - Voice : Mobile, Fixed, VoIP - esms for hearing impaired ( also ITUv21 text over voice, real time text using special terminals) - Telematics in certain vehicles that includes a voice call + separate SMS data message PSTN-IP Gateways VoIP CPs ~65% Mobile >80 Communication Providers (CPs) BT Public Network Fixed/Mobile Networks 999/112 Rapid answer PCA 5 of >95% Assured voice connection to local EACR (<10 secs) Network Location GMLC for mobiles BT 999 Call Centres Stage 1 PSAP BT (6 sites) ~ 28m calls/year EISEC Location Hub uses network and handset location Handset locations via SMS AML (139 Local Controls Stage 2 PSAPs) Public networks (BT and others) Location VPN Police 47% Ambulance 49% Fire 4% Coastguard <1% Automatic Location (<2 secs) Call filtering (~34% not connected, or connected to Police IVR/Silent Solution)

3 Emergency Calls from Mobile Phones 65% of calls made to Emergency Services in UK from mobile phones 80%% of Police calls! Location information traditionally from mobile cell site only caller could be located anywhere in what can be a large area (average 12 sq km) Calls from mobiles take on average 30 seconds longer before despatch however can typically take 3 minutes of extra questions for stressed/injured victims [LAS found that 4000 calls / month take more than 3.5 mins before despatch] Of the total confirmed critical incidents, approx 36k per year involve searches of 30+ minutes because the mobile caller unable to give location About 480k/yr other cases of caller being unable to speak clearly: currently not able to be easily or fully checked.. Source: BT & DCMS 999/112 Liaison Committee 3

4 Advanced Mobile Location service (AML) use the handset s own location No impact on standard emergency call (voice + network s cell location info) Smartphone recognises an emergency call is being made : invisible to user Phone turns-on GNSS & WiFi facilities if needed and collects location information (for up to 20 seconds)** Zero-rated SMS containing location sent to PSAP (not visible on handset, no charge) Mobile network configuration to allow SMS when emergency call in progress Minimum battery level needed to allow enhanced service PSAP matches received location SMS to emergency (voice) call PSAP verifies handset GNSS/Wifi location is consistent with network s cell location Handset location information made available to 999 call-takers of requested Emergency Service (Police, Fire, Ambulance, Coastguard) This is not an App : no end user installation needed, simply call 999 as normal ** Notes (i) where possible this will supplement the existing location information does not replace it. (ii) maintains privacy : only triggered when emergency call made 4

5 Google Location Service Ephemeris provider (eg Qualcomm) Key Mobile Networks Aggregation Provider Stage 1 PSAP(BT or contracted supplier) Stage 2 PSAP Default location used when no AML and to check consistency of handset locations

6 Results - Rural MLG 2024m radius AML 6m radius GPS

7 Results - City MLG 195m radius AML 22m radius GPS

8 Results - Office MLG 383m radius AML 34m radius Wi-fi

9 Results - Home MLG 2808m radius AML 30m radius Wi-fi

10 Results Moving Car Westbound Eastbound

11 Current live results from Android handsets On making an emergency call (999 or 112 in the UK), the handset uses AEL to try to establish its location for 20 seconds while the emergency voice call is established, and the handset location is transmitted to the PSAP using SMS (with AEL s different Data Coding Scheme to standard texts) For week JULY the split over 125,666 location messages from AML/AEL is: 45% GNSS, 34% WiFi, 9% Cell and 12% No Location[all MNOs] The location yield, ie ignoring the NoLocs, is still about 89%. Main reason for the 11% discards is a larger area than what we already have. Some WiFi locations are also discarded if appreciably different to the mobile network location 11 ( we give a lower level of trust to WiFi in our algorithm). Reported Accuracy Percent No location 12% 0-9m 24% 10-19m 30% 20-49m 20% 50-99m 6% m 5% 999+m 3%

12 Examples from UK emergency services AML provided critical, precise locations Stabbing victim unable to provide location verbally Person who had been stabbed near a community centre in Neath but did not know their exact location : AML allowed location of the person immediately and actually plotted the caller on a map to a distance of 18 feet (5m) Suicidal caller who would not provide a location The caller states that she is going to throw herself in front of the next train that comes along and refuses to give her location. Call taker uses initiative and identifies a station near the AML location. Call taker uses this as the location, passing to despatchers in just over a minute + police are on scene in 7 minutes locating the caller Caller with learning difficulties/mental limitations who could not provide location Vulnerable male with severe learning difficulty who had been robbed call taker tried numerous times and ways to get a location, nothing forthcoming then used lat/long and found the victim Don t know how he would have been found without lat/long Caller being attacked in a London park : did not know which park Car crash with caller not knowing exactly where they were on London ring road Domestic violence incident where caller unable to pass location

13 Summary of AML benefits - 1 Significantly increased location precision from handset GNSS and WiFi functionality - less time to find person in need Fewer questions about location reduced caller/call taker stress Faster response to citizens in life-threatening conditions Reduced costs to Emergency Services less questioning + searching and higher throughput 13

14 Summary of AML benefits - 2 Not an App sustainable, does not depend on end user, supplements standard GSM voice call wherever possible. Minor changes for mobile networks : no new technical standards, quick to implement Still need network cell location for cases where AML not possible and to help eliminate any unreliable readings Rolled out in other countries Estonia, Lithuania, Belgium, Ireland, New Zealand, Austria, Iceland, and parts of Italy and Switzerland others testing or planning as AML adapted to allow for different PSAP + Location Delivery models ETSI TR has captured AML functionality Will continue to improve as handset technology evolves 14

15 GNSS Trend over Time

16 NoLoc Trend over Time