Integrated emergency call support for mobile and nomadic devices
US8761721B2 · kind B2 · utility
48Cited by
0References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 27, 2011 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | Nov 17, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W4/90
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A device receives an emergency call via a session initiation protocol (SIP) invite that includes a cell identification (ID) and a service or device type associated with a user equipment (UE). The device determines, based on the service or device type, whether the UE is a fixed device or a wireless device, and uses a static approach to route the emergency call to a public safety answering point (PSAP) when the UE is a fixed device. The device uses a cell database to route the emergency call to the PSAP, based on the cell ID, when the UE is a wireless device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.