Patent ID: 8929284
Filing Date: 2015-01-06
Classification: H04W

Abstract:
1. A method for a user equipment (UE) to initiate an inter-system transfer of a communication session, comprising: listening for communications from a first technology type network and a second technology type network, wherein the first technology type network and the second technology type network comprise different technologies; establishing a circuit switched session with the first technology type network; establishing a packet switched session with a serving node of the second technology type network; determining, by the UE, to transfer the packet switched session to a target node of the first technology type network; transmitting a message, by the UE, to the target node-to cause the target node to fetch information about the packet switched session from the serving node in order to effect the transfer, wherein transmitting the message to the target node causes the transfer of only the packet switched session; and maintaining the circuit switched session with the first technology type network after the transfer of the packet switched session.