Patent ID: 7499705
Filing Date: 2009-03-03
Classification: H04W

Abstract:
1. A method of effecting hand-off of a call from a mobile station in a first wireless communication system of a first type having a first mobile switching node operable with a first base station and a second mobile switching node operable with a second base station, and a second wireless communication system of a second type, the method comprising: receiving a handoff request; requesting a handoff number, the handoff number used for routing the call from the first base station to the second base station; receiving the handoff number; transmitting a prepare handoff message, the prepare handoff message comprising the handoff number; sending an initial address message via at least one wireless network to initiate a circuit connection from the first mobile switching node to the second mobile switching node; and receiving the call, wherein at least one of the first mobile switching node or the second mobile switching node is suitable for mapping messages expected in formats and structures in the first wireless communication system of the first type to formats and structures in the second wireless communication system of the second type, the formats and structures in the first wireless communication system of the first type being different from the formats and structures in the second wireless communication system of the second type, and wherein the first wireless communication system is a Code Division Multiple Access (CDMA) system, the second wireless communication system is selected from a group consisting of an Integrated Digital Enhanced Network (iDEN) system and an Orthogonal Frequency Division Multiplexing (OFDM) system.