Patent ID: 8705487
Filing Date: 2014-04-22
Classification: H04W

Abstract:
1. A method of providing voice call continuity in a network system, comprising: locating, by a user equipment enterprise member registered in a first network, a second network, wherein one of the first network and the second network comprises a circuit switched network and another of the first network and the second network comprises a packet switched network; transmitting, by the user equipment, a request for a handover to the second network, the request being received by at least one of an enterprise gateway server of the packet switched network and a carrier gateway server of the circuit switched network; evaluating the request by at least one of the enterprise gateway server and the carrier gateway server to determine whether the handover is acceptable based on enterprise policies; and determining, by a voice call continuity service, whether to allow the handover by an enterprise network node and a carrier network node, wherein a requirement to allow the handover comprises at least one of dual approval by both the enterprise network node an the carrier network node and single approval by one of the enterprise network node and the carrier network node which is designated as an authority to override a decision of the other node, wherein the enterprise network node is controlled by an enterprise network and the carrier network node is controlled by a carrier network.