Methods and apparatuses for user registration in the ims by msc server when using sgs / gs interface

摘要

592796 A method of terminating a session to a subscriber where the method is executed by a call control node and the call control node for performing terminating a session to a subscriber are disclosed. The call control node (900) comprises a receiving unit (902) for receiving a registration request for circuit switched registering a subscriber in an IP Multimedia Subsystem (IMS); a registering unit (604) for circuit switched registering the subscriber in the IMS, a determining unit (906) for determining whether a registration shall be considered when terminating the session to the subscriber, and a terminating unit (908) for terminating the session to the subscriber. Determining comprises receiving a registration consideration indication whether the registration of the subscriber in the IMS shall be considered when terminating the session to the subscriber