SIP out-of-dialog REFER mechanism for handoff between...

Details SIP out-of-dialog REFER mechanism for handoff between... SIP out-of-dialog REFER mechanism for handoff between...

2011-01-18

2011-01-18

Ferris, Derrick W (Department: 2463)

Multiplex communications

Special services

Conferencing

Reexamination Certificate

active

07872994

ABSTRACT:
In one embodiment, a method includes steps of verifying, by a first server, that a user associated with an endpoint is authorized to access a service provided by a second server. The first server then sends a Session Initiation Protocol (SIP) out-of-dialog REFER with a Replaces header to the second server. A dialog identification ID of a session between the endpoint and the first server is embedded within the Replaces header. The SIP out-of-dialog REFER causes the second server to send a SIP INVITE with the Replaces header to the endpoint to establish a new session between the endpoint and the second server. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure.

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patent: WO 94/09598 (1998-04-01), None

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