Patent ID: 8634381

Claim:
A method performed by a processor, comprising: receiving a first request originated by a mobile station, wherein the first request contains information relating to both packet-switched communication and circuit-switched communication of data in a session, wherein the first request is originated by the mobile station in response to detecting that a transfer is to be performed from a source packet-switched access network to a target network in which different parts of the session is to be communicated in the packet-switched domain and circuit-switched domain; completing the transfer using the information in the first request; in response to the first request, sending a response that contains a public service identity that enables generation of a second request that contains a media description part that refers to a media gateway to be used for the circuit-switched communication; receiving the second request; and combining the media description part of the second request relating to the circuit-switched communication with a media description part of the first request relating to the packet-switched communication.