SIP out-of-dialog REFER mechanism for handoff between front-end and back-end services
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United States of America Patent
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Jan 18, 2011
Issued Date -
N/A
app pub date -
Aug 11, 2006
filing date -
Aug 11, 2006
priority date (Note) -
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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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