(57) ABSTRACT A method of evaluating Initial Filter Criteria (IFC) at a ter minating Serving
Call Session Control Function (S-CSCF) in an IP Multimedia Subsystem network. Upon …

A triggering method for IP multimedia service control. The triggering method comprises
examining a SIP response message received by a S-CSCF according to a set of response …

A method of handling traffic within an IP Multimedia Subsystem, IMS, network. The method
comprises registering an IMS user with a first Serving Call Session Control Function, S …

A method is disclosed for use by an Interrogating Call/Session Control Function (I-CSCF) of
an IP Multimedia Subsystem (IMS). The method comprises, in response to receipt of a …

Abstract A Serving Call Session Control Function,(S-CSCF) of an IP Multimedia Subsystem
(IMS) determines charging capabilities of an Application Server (AS) of the IMS providing the …

(57) ABSTRACT A method for implementing service interaction in the IP multimedia
Subsystem is disclosed in the present invention, wherein each service logic has a unique …

(86). PCT No.: PCT/EP2005/052439 A method and Serving Call/State Control Function (S-
CSCF) S371 (c)(1) for handling a Session Initiation Protocol (SIP) communica tion within an …

Apparatus configured to implement a Proxy Call Session Control Function for use within an
IP Multimedia Subsystem core network. The apparatus comprises a receiver for receiving a …

A method of operating an internet protocol (IP) multimedia Subsystem is disclosed. The
method comprises, in a call ses sion control function (CSCF), receiving a session initiation …

The present invention overcomes the disadvantages of the prior art by allowing a business
enterprise or other institution to serve IMS applications to their user community without …