Methods and apparatus for supporting session signaling and mobility management in a communications system
US6970445B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2002 |
| Grant date | Nov 29, 2005 |
| Priority date | — |
| Expiry date | Jun 11, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/005
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A mobile communications system that uses IP packets to transmit data between end nodes, such as mobile devices, is described. In order to facilitate session establishment, maintenance, security, and handoff operations, access nodes through which end nodes communicate with one another include a session signaling server module and a mobility agent module. The session signaling server module may be implemented as a SIP server while the mobility agent module may be implemented using Mobil IP signaling. The mobility agent and SIP server within an access node are identified using a single shared identifier, IP address. The same security method and common secret may be used to provide security with regard to both mobile IP messages and SIP messages. Sessions admission decisions and resource allocation for admitted sessions can also take place internally to the access node of this invention without need for signaling to external elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.