This Specification is provided for future development work within 3GPP only. The Organizational Partners accept no liability for any use of this Specification. Descriptor and Table of Contents (1 of 31) for 3GPP TS – IP multimedia call control protocol based on Session Initiation Protocol (SIP) and Session. ITU-T A.5 justification information for referenced document 3GPP TS V [] draft-holmberg-sipcore-auth-id (October ): “Authorization.

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Justification for the specific reference:. Preferably, the P-Asserted Identity is the same in both the message received 3g;p the S-CSCF and the message returned from the Application server, this identity identifying the originating user equipment. Click for automatic bibliography generation. According to a sixth aspect of the invention there is provided a method of handling a Session Initiation Protocol communication within an IP Multimedia Subsystem, where the communication is subject to a call forwarding operation handled by a Session Initiation Protocol Application Server, the method comprising: This may be mapped against the ODI.

This problem arises with messages other than INVITE, including, for example, other initial request messages and standalone messages.

FIELD OF THE INVENTION

According to a fourth aspect of the 3bpp there is provided a method of handling a Session Initiation Protocol communication within an IP Multimedia Subsystem, where the communication is subject to a call forwarding operation handled by a Session Initiation Protocol Application Server, the method comprising: Whilst SIP was created as a user-to-user protocol, IMS allows operators and service providers to control user access to services and to charge users accordingly.

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IP Multimedia services provide a dynamic combination of voice, video, messaging, data, etc. The P-Asserted Identity is an identity that is used among trusted SIP entities, typically intermediaries, to carry the identity of the user sending a 3gpo message as it was verified by authentication. Search Expert Search Quick Search. Qualifying information is on file at 3gpl. SIP Preconditions have an impact on call success rate and post dialing delay.

The method according to claim 1, wherein said step of processing the SIP message according to the originating procedure comprises determining whether any restrictions are placed on the second user equipment identified by the original R-URI, and identifying initial filter criteria IFCs for the second user equipment and carrying out further processing steps as defined by the IFCs. The invention claimed is: The method according to claim 1, wherein said forwarding indicator is added to the message route header of the SIP message received at the SIP Application Server.

According to a fifth aspect of the invention there is provided a method of handling a Session Initiation Protocol communication within an IP Multimedia Subsystem, where the communication is subject to a call forwarding operation handled by a Session Initiation Protocol Application Server, the method comprising: Clear description of the referenced document:.

ITU-T work programme

Current information, if any, about IPR issues:. Other for any supplementary information:.

The method according to claim 7, wherein said forwarding indicator is added to a route header of the SIP message. A SumoBrain Solutions Company. United States Patent Other solutions to this problem must therefore be sought. The degree of stability or maturity of the document:.

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ETSI IMS Library

It will be appreciated by the person of skill in the art that various modifications may be made to the embodiments described above without departing from the scope of the present invention. In the example of FIG. Relationship with other existing or emerging documents:.

Said step of processing preferably comprises determining whether any restrictions are placed on the user equipment identified by the original R-URI, and identifying IFCs for this user equipment and carrying out further processing steps as defined by the IFCs.

However, this is unlikely to be accepted by operators who will prefer to leave the P-Asserted Identity unchanged from end-to-end. Four alternative solutions are proposed here. The invention is applicable in particular to Session Initiation Protocol initial request messages, e. Request redirection handling in IMC.

According to a second aspect of the present invention there is provided a Session Initiation Protocol Application Server of an IP Multimedia Subsystem having processing means for implementing a call forwarding operation by modifying a received message to include a forwarding indicator and a R-URI identifying the USER Equipment to which the call is to be forwarded.

In particular, the P-Asserted Identity is unchanged in order to satisfy operator requirements.

ITU-T A.5 reference justification

Overview and System Level specification”. Any explicit references within that referenced document should also be listed: Committed to connecting the world. Justification for the specific reference: