AML workshop - Deployment reports 1
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1) Google's Android OS update will accelerate deployment of Advanced Mobile Location (AML) in the UK by allowing each mobile network and handset provider to utilize Google's AML functionality rather than maintaining their own. 2) Testing of Google's "Thunderbird" AML system at UK emergency call centers showed it could provide caller locations within 20 seconds for 100s of test calls across various locations using SMS. 3) A gradual rollout of Thunderbird was started in June 2016 across UK mobile networks, initially enabling location for a small percentage of calls. Initial results showed most locations were accurate to within 50 meters.
AML workshop - Deployment reports 1
- 1. AML – Advanced Mobile Location 999 – improving precision for mobile calls
- 2. UK Emergency Service BT Public Network Fixed/Mobile Networks BT 112 Call Centres Stage 1 PSAP BT (6 sites) ~ 28m calls/year Public networks (BT and others) Police 47% Ambulance 49% Fire 4% Coastguard <1% 999/112 (158 Local Controls – Stage 2 PSAPs) 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 ~62% Mobile >80 Communication Providers (CPs) PSTN-IP Gateways VoIP CPs Location Hub – uses network and handset location Location VPN Some handset locations via SMS – AML Network Location – GMLC for mobiles
- 3. Deploying Google’s AML in UK • UK already has AML - some handsets on some networks but only slowly growing • Google’s Android OS update to Play Services accelerates deployment -> means each handset provider + network does not have to maintain it’s own AML functionality • BT PSAP tested with Google : 100s of test calls in a variety of locations to optimise Thunderbird Configuration for SMS :- - use of “data SMS” - time to gather location (20 seconds) - works alongside existing AML functionality (on some handsets) • Coordinated meetings with Mobile Networks, Google and UK Regulator - further testing with each network using wider range of handsets - agreed common UK Thunderbird Partner Configuration - allowed agreement to be signed and some changes to online Ts and Cs made - agreed gradual rollout : enabling small % calls to start • Rollout started on 6 June 2016
- 4. Thunderbird rollout in UK Calls/day from day 1 (6th June) • Day(2pm-2pm) Calls Throttle (%Enabled) • 1 (Mon-Tue) 35 2% (2 MNOs @2%) • 2 (Tue-Wed) 59 • 3 (Wed-Thu) 73 • 4 (Thu-Fri) 162 4% • 5 (Fri-Sat) 200 • 6 (Sat-Sun) 262 • 7 (Sun-Mon) 236 • 8 (Mon-Tue) 367 10% (3 MNOs @10%) • 9 (Tue-Wed) 476 • 10 (Wed-Thu) 586 • 11 (Thu-Fri) 716 • Positioning Method breakdown Position Method Count Percentage • Wifi 1638 49.47% • GNSS 998 30.14% • No Loc 497 15.01% • Cell 178 5.38% • Grand Total 3311 100.00% Handsets Alcatel, EE, HTC, Huawei, LG, Motorola, Oneplus, Samsung, Sony, Vodafone……
- 5. Voice call set-up ~5s BT999 TTA ~1s BT PSAP handling ~8s Police TTA ~6s Second Location Hub search Re-query after ~ 20 secs Timeline to most effectively use the handset location User makes call Call answered by Stage 1 PSAP Police call handling Time (seconds) Event 0 5 3010 15 20 25 Call connect initiated. Call answered by Stage 2 PSAP First Location Hub search. Network Location Data Arrives ~1 sec after call answered Actual Handset Location arrival times 37
- 6. Live use • Examples from today – if internet access • Sample of 1000 Thunderbird Results • 15% <10m radius • 10m<30%<20m • 20m<30%<50m • 50m<5%<200m • 200m<5%<2.5km • 15% No location