Patent ID: 8320334

Claim:
A method comprising: receiving, by a first mobility management entity associated with a packet-switched wireless access network, information associated with a mobile station being served by the first mobility management entity, wherein the information identifies a serving generic access network controller for the mobile station, the serving generic access network controller being used to provide a circuit-switched service to the mobile station while the mobile station is attached to the packet-switched wireless access network; initiating, by the first mobility management entity, a handoff of the mobile station from the packet-switched wireless access network to a circuit-switched wireless access network, wherein the circuit-switched wireless access network is in a region served by a second generic access network controller different from the serving generic access network controller; and in performing the handoff, the first mobility management entity using the information to identify the serving generic access network controller to communicate handoff-related messaging to the serving generic access network controller to cause provision of the circuit-switched service to be handed off from the serving generic access network controller to the second generic access network controller.