NG112 reference
Mobile Location
Structured NG112 reference page.
112 readiness
Policy, location, routing, and response quality connected in one operational model.
Mobile and IMS
Mobile Location
Mobile emergency location may come from cell information, GNSS, Wi-Fi positioning, handset emergency features, AML, IMS-related procedures or national platforms. Useful systems preserve source, uncertainty and timing instead of presenting every location as equally reliable.
What it does
Mobile location combines network-derived, handset-derived and sometimes app-derived evidence to locate a mobile emergency caller.
Mobile location feeds routing, PSAP display and responder guidance for the largest caller population: mobile users.
How it works
- Derives position from mobile radio, device sensors and platform capabilities.
- May produce civic, geodetic or hybrid location evidence.
- Updates may arrive before, during or after call answer depending on implementation.
Key interfaces and protocols
- AML
- 3GPP location procedures
- PIDF-LO where used
- PSAP GIS
Systems it interacts with
- AML
- Geodetic location
- IMS emergency calling
- PSAP GIS
- ECRF
Common failure modes
- Initial cell-based estimate is too broad.
- High-accuracy update arrives after dispatch decision.
- Indoor or underground location is weak.
- Different systems display different positions.
Implementation considerations
- Show uncertainty and source clearly.
- Train call takers on updated-location behavior.
- Keep network, handset and app location evidence distinguishable.
Standards
- 3GPP emergency/location specifications
- IETF PIDF-LO where represented in IP systems
Related NG112 technologies
Related country deployments
No country deployments are listed here until independently verified against official or high-confidence sources.
Related articles
Sources
- 3GPP TS 23.167: IMS emergency sessions - 3GPP, accessed 2026-08-31
- 3GPP TS 24.229: IMS call control protocol based on SIP and SDP - 3GPP, accessed 2026-08-31
- 112: the European emergency number - European Commission, accessed 2026-08-31
- Directive (EU) 2018/1972 establishing the European Electronic Communications Code - European Union, accessed 2026-08-31
- Next Generation 112 and the new Emergency Services Networks Landscape - EENA, accessed 2026-08-31
Last verified: 2026-08-31