In 3 years, Advanced Mobile Location has brought considerable improvements to public safety. In this panel, experts will discuss the latest updates and the future improvements of the technology. Chair: Christoph Kautz, Deputy Head, Unit Galileo and EGNOS – Applications, security, international cooperation, European Commission

1. Confidential + ProprietaryConfidential + Proprietary
Android Emergency Location
Service 2019 Update

2. Confidential + Proprietary
Deployed Testing/Planning to deploy
Status today
Currently deployed in
18 countries (600+
million people, 1.3M
calls per day) via
partnerships with:
● Governments
● Mobile network
operators
● Public safety
infrastructure
vendors
Deployed Testing/partially deployed

3. Confidential + Proprietary
Android Emergency Location Service
Supplemental service that quickly sends enhanced
location from an Android handset to emergency
services when the user contacts 112.
● Seamless, global solution
○ Supported in ~99% of Android devices with Google Play
Services (Android OS 4.0/ICS and up).
○ Regular over-the-air updates.
● Handset Initiated & Handset Derived Location
○ ELS only activates when user contacts 112
○ Location calculated on-device -- location is fused
multiple sources: cell, GPS, wi-fi, device sensors.
● Free
○ Free for all ELS partners.

4. Confidential + Proprietary
Emergency Location Data Flow
ELS
ENDPOINT
(set up + managed
by ELS Partner)
PSAP911
Emergency
call initiated
by Android
device
ELS location
computed on
device and sent
directly to Endpoint
as Data SMS or
HTTPS message
per AML standard
Endpoint is set up and managed by
ELS Partner, who is responsible
for making ELS location available
to Emergency Services (push or
pull). Partner specifies ELS
configuration parameters. Ideally 1
Endpoint per country.
AML - Advanced Mobile
Location, open standard for
sending emergency location
(supported by Android ELS)
ELS Endpoint: a SMSC or
HTTPS server maintained by
partner that can receive ELS
emergency location data
ELS Partner: carrier/MNO,
government or public safety
vendor that meets ELS partner
requirements
PSAP (Public Safety
Answering Point): call center &
dispatch control for emergency
services

5. Confidential + Proprietary
What makes ELS different?
● No PII stored by Google
○ ELS only activates when user contacts 112
○ No location data stored on Google servers
● Standards-based
○ Uses Data SMS and HTTPS, standard protocols and technologies
○ Easy to integrate with emergency services infrastructure.
● Robust & Highly Configurable
○ Drills deep for location fix to get the best location for duration of the emergency call.
○ Location always sent with accuracy radius.
○ Multiple configuration options -- emergency numbers, location reporting intervals,
battery threshold, etc

6. Confidential + ProprietaryConfidential + Proprietary
New Capabilities Since EENA’s
2018 Conference

7. Confidential + Proprietary
User opt-out
feature
● Android OS 9 (Pie):
Settings > Security &
Location > Location >
Advanced > Emergency
Location Service
● Fewer clicks in
future OS releases
Source: Android 9 (Pie) on Pixel 2

8. Confidential + Proprietary
Text-to-112/911 or any other emergency number
● ELS has supported text-to-112 since May 2018
○ Activated in 5 countries in Europe, 7
globally
● Important to work with CPE/CAD vendor to
make sure system can properly receive texts to
112

9. Confidential + Proprietary
Data SMS Inbox for ELS Manager app
Mock emergency call
triggers sending
emergency location to a
custom ELS Endpoint112

10. Confidential + Proprietary
Z-axis: works on all ELS-enabled handsets for HTTS today
● Output = WGS84
reference ellipsoid
model (like GPS)
● Uses all sensors in the
device but doesn’t
require:
○ HW modifications or
barometer in handset
○ A proprietary
solution
○ Licensing spectrum
or any reference
network
1.57 meters
67% (1-sigma)
4.8 meters
80%

11. Confidential + Proprietary
ELS Test: Indoor
Location @ Parallel
Room B on ELS
Manager app

12. Confidential + Proprietary
Resources
● Web site: crisisresponse.google/els
● Google blog posts:
○ Expanding ELS to the US, 9/19/2018
○ Helping Emergency Services Find You When You Need
it Most, 7/25/2016
● Team email: android-emergency-location@google.com