Patent ID: 8937859
Filing Date: 2015-01-20
Classification: H04L,H04W

Abstract:
1. A method of operating a communication system, the communication system comprising a packet switched wireless access network and a circuit switched wireless access network, the method comprising: providing a first access network controller and a first mobility management entity, the first mobility management entity being configured to cooperate with the first access network controller to provide a circuit switched service to a mobile station while the mobile station is attached to the packet switched wireless access network in a first coverage area; providing a second access network controller and a second mobility management entity associated with a second coverage area, the second mobility management entity being configured to cooperate with the first access network controller to provide a circuit switched service to the mobile station when the mobile station has moved from the first coverage area to the second coverage area; and operating a home subscriber system to provide, to the second mobility management entity, information identifying the first access network controller as serving the mobile station to enable the second mobility management entity to initiate handoff of the mobile station from the packet switched wireless access network to the circuit switched wireless access network.