Mobile voice over internet protocol operation
US9078234B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 2010 |
| Grant date | Jul 7, 2015 |
| Priority date | — |
| Expiry date | Sep 29, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W48/20
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A mobile station is operated within at least one radio network having a plurality of base stations. Only some of the plurality of base stations support a Voice over Internet Protocol, VoIP, service. The mobile station is registered with a first base station of the plurality of base stations. The mobile station may be registered with a second base station. The mobile station determines that one of the first base station and the second base station has functionality to support VoIP and the other does not. A Routing Area Update Request message or Tracking Area Update Request message is sent from the mobile station to the second base station in response to determining support for VoIP.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.