1.2 ed parsons, google
TRANSCRIPT
Ed [email protected]@edparsons
112,999,911 + Lat,Lon ?Adding Handset location to Emergency calls in Android
2/3 of the UK Population
90% Millennials
Primary internet gateway
The Smartphone Society
Source : OFCOM 2015
Location makes smartphones smart
71%Of 911 calls in the United States are made by mobile users
December, 29 2014, 4amShanell Latrice Anderson, 31
Calls 911 from her car..
“But my phone knows where I am ?”
A solution...
Users reporting an incident are often unable to provide emergency services with accurate information about their location
The goal: Reduce response times and save lives
Motivation
Cell Position 164 Meters
AGPS Position106 Meters
Google FLP 16.8 Meters
Emergency Location Service
Overview
ELS sends emergency location directly from the handset to operators
Computed using Fused Location ProviderFuses GPS, Wi-Fi, and cell
Faster and more accurate than traditional aGPS or cell-tower solutions
Low energy use
How it works
1. User places emergency call.2. Location is computed on-device using Fused
Location Provider3. Location sent directly from device to operator,
using MCC/MNC to look up the appropriate endpoint (either HTTPs or Data SMS AML Message ).
Fundamental Principles
1. Device-Initiated: Location can only be initiated by a user explicitly dialing 112/999. Location is relayed directly from handset to specified endpoint (not visible to Google).
2. Backwards-Compatible: Live on > 99% of existing Android devices (2.3+) via Play Services. No OS or hardware upgrades required.
Test Results (US Carrier)
Independently tested by Tier 1 US Carrier(One Test Location) Indoor Survey Point:● Building, 6th Floor SW
Stairwell (Deep Indoors)
Over 100 Sessions Yield 1-Sigma (67%) Accuracy
2-Sigma (90%) Accuracy
2-Sigma (90%) Latency
AGPS 63.11% 42.83m 106.67m 25.66s
Cell Tower RTT 36.89% 153.69m 164.95m 25.04s
Google FLP Location 90.2% 16.84m 17.62m 15.00s
Met
ers
< 17 meters
AGPS Cell RTT Google FLP
How can you use it?
1. Create an HTTPs and/or Data SMS endpoint for receiving emergency location
2. Specify to us the endpoints for integration with Android
Already live !
Early results from the UK..
10,000 Locations per day !
Emergency Location Service Configuration
Configurations control:When Thunderbird is activated
How Thunderbird gathers emergency location
Where emergency locations are sent
When:Which emergency numbers, and for which MCC/MNC values?
How:How often is location reported, and is the first available fix reported?
Where:Which endpoint is location reported to (server address, SMS number).
