A serving call server control function (S-CSCF) server in an IMS network is configured to
receive a service request targeting a client device belonging to the IMS network and under …

The invention provides a method of processing a registration message according to initial
filter criteria in IMS network. The method is as follows: after a registration for a user is …

The invention relates to a method of changing allocation of Serving-Call Session Control
Functions (S-CSCFs) to a user of an IMS network. The user is being provided with services …

The present invention relates to assigning an S-CSCF to an un-registered user in an IMS
network. A HSS maintains information about a registration state of users and about …

BACKGROUND To originate a voice over IP (VoIP) call between a calling device and a
called device in an IMS network, an originating Serving Call Session Control Function (S …

(57) ABSTRACT A method of routing a call setup request to a destination serving node
serving a destination Subscriber in an IMS net work. The method comprises the steps of a …

The invention concerns a device (D) dedicated to controlling access of a terminal (UE),
connected to a CS domain of a mobile network comprising a MSC center (VMSC) running …

The present invention relates to a service registration, con trol, and brokering method in an
IMS-based communication system, and a system using the same. In the case that a user …

The present invention proposes a solution for providing IMS services to users having circuit-
switched controlled termi nals. In particular, it is proposed, in order to allow IMS to take the …

A method of routing a terminated call to a subscriber from an Internet Protocol based domain
(IMS) to a circuit switched domain (CS), wherein said Internet Protocol based domain (IMS) …