Patent ID: 8467379

Claim:
A method of selecting an access domain for receiving a speech and/or video call at a terminating mobile station of a mobile communications network, the method comprising: receiving an INVITE for establishing a call from a central service control via a Packet-Switched (PS) domain; determining if an access network supports bidirectional speech and/or video; if the access network does not support the bidirectional speech and/or video, determining if the access network supports a simultaneous Circuit Switched (CS) and Packet Switched (PS) connection; if the access network supports the simultaneous CS and PS connection, transmitting a first response message indicating that video is carried via a CS bearer to the central service control; if the access network does not support either the bidirectional speech and/or video or the simultaneous CS and PS connection, transmitting, by the terminating mobile station, a second response message indicating a session will be established via the CS domain to the central service control; and establishing the CS bearer to the central service control for the video transmission.