Patent ID: 6609003
Filing Date: 2003-08-19
Classification: H04B,H04W

Abstract:
A method for performing a handoff when a mobile station receiving a transmission diversity signal travels from a first base station transmitting a signal in a transmission diversity mode of operation to a second base station transmitting a signal in the transmission diversity mode of operation, the method comprising the steps of:enabling the mobile station to communicate with the first base station in the transmission diversity mode of operation; prior to performing the handoff, enabling the mobile station to communicate with the first base station in a non-transmission diversity mode of operation; during the handoff, enabling the mobile station to communicate with the first and second base stations in the non-transmission diversity mode of operation; upon completing the handoff, enabling the mobile station to communicate with the second base station in the non-transmission diversity mode of operation; and after a predetermined time, enabling the mobile station to communicate with the second base station in the transmission diversity mode of operation.