Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2006-09-19
2006-09-19
Lee, Andrew C. (Department: 2616)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C370S401000
Reexamination Certificate
active
07110393
ABSTRACT:
A system and method for providing user mobility handling in a network telephony system is provided. In one embodiment, the method includes receiving a register request from a network entity on a first domain and modifying a user identifier in the register request. A registration database is preferably updated with the modified user identifier. The modified register request is transmitted via a network to a network entity on a second domain. An authentication process preferably takes place between the network entity on the first domain and the network entity on the second domain. If successful, a confirmation is received via the network from the network entity on the second domain. Various embodiments of the invention may, for example, allow a user typically located in a home domain to temporarily move to a visiting domain, while maintaining the user's home domain user identifier. Preferred embodiments utilize the Session Initiation Protocol.
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Ramakrishna Sudhakar
Tripathi Anoop
3Com Corporation
Lee Andrew C.
McDonnell Boehnen & Hulbert & Berghoff LLP
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