Patent ID: 8804666
Filing Date: 2014-08-12
Classification: H04W

Abstract:
1. A method for providing handoff configuration information to a dual mode access terminal (AT) located in an Internet Protocol (IP) Multimedia Subsystem (IMS) network, the handoff configuration information being for use in a call handoff of the dual mode AT between a circuit switched (CS) network and the IMS network, the IMS network including an IMS server for use in management of a call session of the dual mode AT, the method comprising: while the dual mode AT is located in the IMS network, sending an INVITE request for requesting a call session with a target AT from the dual mode AT to the IMS server; receiving, at the dual mode AT, from the IMS server a response message sent by the target AT, which authorizes an establishment of the requested call session, the response message including handoff configuration information for use in handing off calls of the dual mode AT between the CS network and the IMS network; and storing the received handoff configuration in the dual mode AT for future use, wherein the handoff configuration information includes: