Message handling in an IP multimedia subsystem

摘要

A Session Initiation Protocol Application Server of an IP Multimedia Subsystem having processing means for handling a message received from a Serving Call/State Control Function, the means being arranged to handle the message based upon a header of the message containing the URI of the served user, this header having been introduced by the Serving Call/State Control Function and being other than the P-Asserted Identity and the R-URI.

主权项

1. A method of handling a Session Initiation Protocol communication within an IP Multimedia Subsystem, the method comprising:
receiving a Session Initiation Protocol message at a Serving Call/Session Control Function (S-CSCF) node serving a User; at the S-CSCF node, adding to the message a P-Served-User header, the P-Served-User header explicitly identifying the Uniform Resource Identifier (URI) of the User served by the S-CSCF node and conveying whether the message is originated by or destined for the served User; forwarding the message to a SIP Application Server; and at the SIP Application Server, handling the message on the basis of criteria defined for the User identified in said P-Served-User header.