Method and system for tunnel optimized call setup for mobile nodes
US6816912B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2000 |
| Grant date | Nov 9, 2004 |
| Priority date | — |
| Expiry date | May 27, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W80/10
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and system for establishing and using a unidirectional virtual tunnel with foreign service applications (e.g., Session Initiation Protocol (“SIP”), H.323, etc.) on a foreign network for a mobile node (e.g., a Mobile Internet Protocol (“IP”) node) that has roamed from a home network to the foreign network. The unidirectional virtual tunnel overrides a default communications path from foreign service applications on a foreign network to a home agent on home network and to a mobile network device on the foreign network and creates a new communications path from the foreign service applications to a tunnel server on the foreign network, to the foreign agent and to the mobile network device on the foreign network. The method and system may help reduce the round-time trip delays encountered when trying to establish a voice, video or data call (e.g., Voice over IP (“VOIP”)) from a mobile device that has roamed from its home network to a foreign network and is using mobile IP to communicate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.