Emergency support for voice over internet protocol (VoIP) over mixed macro and femto networks
US8451779B2 · kind B2 · utility
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Key dates
| Filing date | Jan 24, 2011 |
| Grant date | May 28, 2013 |
| Priority date | — |
| Expiry date | Dec 2, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W64/00
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A device receives, from an emergency call server (ECS), a query that includes a telephone number, a femto global positioning system (GPS) identifier, and an Internet protocol (IP) address associated with a user equipment (UE) placing an emergency call. The device obtains a serving cell E-UTRAN cell global identifier (ECGI) of the UE based on the query, and determines whether the ECGI is a macro ECGI associated with a base station or a femto ECGI associated with a femto cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.