Methods and apparatus for supporting session signaling and mobility management in a communications system
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United States of America Patent
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Nov 29, 2005
Grant Date -
Dec 19, 2002
app pub date -
Jun 11, 2002
filing date -
Jun 14, 2001
priority date (Note) -
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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.
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