Patent ID: 9025553
Filing Date: 2015-05-05
Classification: H04L,H04W

Abstract:
1. Apparatus configured to operate as a Service Centralization and Continuity Application Server (SCC-AS) within an IP Multimedia Subsystem network, the apparatus comprising: a receiver configured to receive a SIP INVITE originating from or sent via an access domain and configured to determine that the INVITE relates to a handover of a User Equipment, UE, currently served by the SCC-AS, to that access domain and for which a session with a peer UE is ongoing; and a message handler configured to determine if capabilities for the ongoing session, identified within said INVITE, have changed with respect to capabilities previously associated with the ongoing session and, in response to determining that the capabilities have changed, to cause a SIP message to be sent to said peer UE, the message containing the changed capabilities.