Roaming gateway for support of advanced voice services while roaming in wireless communications systems
US7403775B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2005 |
| Grant date | Jul 22, 2008 |
| Priority date | — |
| Expiry date | Dec 23, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/16
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A roaming gateway for support of advanced voice services while roaming in wireless communications systems. The roaming gateway supports push-to-talk (P2T) calls, or other advanced voice services, when P2T subscribers roam from their home network (i.e., a network operated by their service provider where the subscriber's profile resides) into a foreign network (i.e., a network operated by another service provider). The roaming gateway is a specialized version of a real-time exchange that is located in the home network and is connected to mobile switching centers in foreign networks, so that the mobile switching centers in the foreign networks need not be programmed for the advanced voice services.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.