A method for restoring connectivity between a node in an IP Multimedia Subsystem, IMS,
network, and a User Equipment, UE. The UE is associated with a Proxy Call Session Control …

The present invention relates to a method for deregistration of a UE from an IMS, the
deregistration being initiated from and performed by a P-CSCF node. The present invention …

A method of distributing application server addresses in an IP Multimedia Subsystem. Upon
allocation of an application server to a subscriber, the allocated or another application …

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 …

(57) ABSTRACT A method is provided for use in an IP Multimedia Subsystem, IMS, in which
a Serving 5 Call Session Control Function, S-CSCF, of the IMS cooperates with a Home …

A method, apparatus, and application server for dynamically allocating an application server
within an IP Multimedia Subsystem (IMS). A Serving Call/Session Control Function (S …

(87) PCT Pub. No.: WO2006/001683 Apparatus and Method for transmitting control
message PCT Pub. Date: Jan. 5, 2006 related to a packet call service in an IP multimedia …

A method, application server, and Serving Call/Session Control Function (S-CSCF) for
allocating a SIP Application Server to a subscriber in an IP Multimedia Subsystem. A Home …

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 for switching the session control path of IMS centralized services is provided.
When the condition for switching the session control path is satisfied during the ICS session …