DOMAIN SELECTION SYSTEM AND METHOD OPERABLE IN A NETWORK ENVIRONMENT INCLUDING IMS

摘要

In one embodiment, a domain selection method is disclosed for operation in a network environment including a circuit-switched (CS) network and an Internet Protocol (IP) multimedia subsystem (IMS) network. At a network node disposed in the IMS network, status information related to a served user equipment (UE) device is maintained. Status information is preferably updated based on update information provided by the UE device. An incoming call being directed to the UE device is routed to a proper domain based on the status information, among other criteria.