Service mobility and recovery in communication networks

Details Service mobility and recovery in communication networks Service mobility and recovery in communication networks

2005-04-26

2005-04-26

Trost, William (Department: 2683)

Telecommunications

Radiotelephone system

Special service

C455S432300, C455S433000, C455S008000, C455S419000, C709S203000

Reexamination Certificate

active

06885861

ABSTRACT:
A method improves mobility and service recovery for a user in a wireless communication network. Service information concerning the user is stored in a registrar. A subscription message is sent from a user terminal to the registrar. A header in the subscription message contains a unique indication. In response to the subscription message containing a unique indication in a header, the registrar returns a notification message to the user terminal. The payload of the notification message includes service information for the user to be used by the user terminal for communication services.

REFERENCES:
patent: 5313653 (1994-05-01), Sasuta
patent: 20020147000 (2002-10-01), Holmes-Kinsella
patent: 20030073440 (2003-04-01), Mukherjee et al.
Rosenberg, Johnathan. SIP and Instant Messaging. SIP Summit 2001. May 1, 2001.*
Adam Roach, SIP-Specific Event Notification, Jul. 2001, Sections 2, 2.1, 5.1.5.1, 5.2.2, 5.2.3.
Steve Donovan, IMPS-Instant Messaging and Presence Using SIP. Fall VON Developers' Conference, Sep. 13, 2000.

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