Method for selecting an application server, a related call session control network element, a related primary application server and a related called user terminal

A primary Application Server (ASPRIM) for selecting an Application Server in an Internet Protocol multimedia network (IMMN) upon reception of an Internet Protocol Multimedia destined to a called party terminal (CDPT), by a Call Session Control network element (CSCF), said Primary Application Server comprising the following means:

• a. an activation message reception means (ARM), adapted to receive call data corresponding to said incoming IP multimedia call forwarded by said Call Session Control network element (CSCF);
• b. a call analysis means (CAM), coupled with an input to an output of said activation message reception means (ARM) and configured to analyse said incoming IP multimedia call and based on said analysis determine a set of service applications for answering said incoming call;
• c. a call presentation information forwarding means (CPM), coupled with an input to an output of said call analysis means (CAM) and adapted to forward, upon analysis of said incoming IP multimedia call, call presentation information of said incoming IP multimedia call to said called party terminal (CDPT) together with a set of service applications for answering said incoming call, said set of service applications being determined in said analysis;
• and
• d. a user selection reception means (USRM), adapted to receive from said called party terminal (CDPT) a selection of at least one service application of said set of service applications forwarded by said called party terminal (CDPT);
• and
• e. an application selection forwarding means (ASFM), coupled with an input to an output of said a user selection reception means (USRM) and adapted to forward said selection of at least one service application of said set of service applications forwarded by said called party terminal (CDPT) towards said call session control Network element (CSCF).

A called Party Terminal (CDPT) for selecting an Application Server in an Internet Protocol multimedia network (IMMN) upon reception of an Internet Protocol Multimedia by a Call Session Control network element (CSCF), characterised in that said Called Party Terminal (CDPT) comprises:

• a. an Application Presentation Reception means (APRM), adapted to receive call presentation information of said incoming IP multimedia call together with a set of service applications for answering said incoming call from said Primary Application Server (ASPRIM);
• b. application presentation means (APM), coupled with an input to an output of said Application Presentation Reception means (APRM) and adapted to make a call presentation, of said incoming IP multimedia call to said called party terminal (CDPT) together with a set of service applications for answering said incoming call;
• c. application selection means (ASM), coupled with an input to an output of said application presentation means (APM) and configured to select at least one service application of said set of service applications forwarded by said called party terminal (CDPT);
• and
• d. user application selection forwarding means (UASFM), coupled with an input to an output of said application selection means (ASM) adapted to forward a selection of at least one service application of said set of service applications forwarded by said called party terminal (CDPT) towards said call session control Network element (CSCF).