(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 …

(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 …

A method of initiating an IP Multimedia Sub-system communication for a user that is not
registered a priori with the IP Multimedia Subsystem. The method comprises receiving a …

The present invention provides a technique where application servers can initiate sessions
within the IMS network by ini tially sending session initiation messages to the I-CSCF. By …

A method of operating an Internet Protocol Multimedia Subsystem (IMS) network having a
plurality of user interfaces. A terminal agent is interposed between a plurality of Session …

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 …

BACKGROUND 0002 The IP multimedia core network subsystem, here inafter IMS, enables
operators to offer their subscribers mul timedia services based on, and built upon, Internet …

In one aspect, the invention provides a method, and associated apparatus for re-registering
a contact address of a user of an IP Multimedia Subsystem, IMS, network. A request for re …

A method of registering or deregistering a user to or from an IP Multimedia Subsystem (IMS)
network. A SIP Application Server (SIP-AS) performs a registration or deregistration with the …

0002 To facilitate the provision of multimedia services via the packet switched “domain”, the
3" Generation Part nership project (3GPP) responsible for the 3G standards has been …