Fujitsu Corporation

Tatsuya Wakuta

Hitoshi Koike

Ryuichi Sato

Hidehito Yabuta

A method and a wireless communication control apparatus for handing off a mobile station in a mobile communication system including at least two wireless base stations. A handoff threshold which is set in the mobile station is varied according to quality of a wireless link between the mobile station and a first wireless base station which currently controls the mobile station. Then, the processing for handing off the mobile station from the first wireless base station to a second wireless base station is performed based on the handoff threshold.

Method and apparatus for performing handoff by varying threshold level

A base transceiver station equipment, and a radio subsystem using the same, provided a radio interface unit for forming a radio zone, receiving signals transmitted by a mobile station located in that radio zone based on a channel setting procedure or transmitted in a speech state, and measuring the quality of transmission; an identification information acquisition unit for acquiring identification information added to these received signals by a mobile station or identification information indicating a timing when those signals were received; a control unit for interfacing with the radio interface unit and a communication link formed with base station control equipment which takes the lead in the channel setting; and the control unit transmits transmission information given as a signal with a measured quality of transmission exceeding a threshold value among signals received by the radio interface unit and the identification information obtained by the identification information acquisition unit for this signal to the communication link. Thereby, the amount of traffic between a base transceiver station and a base station control office can be reduced.

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Kawasaki, Japan

Tatsuya Wakuta