Patent ID: 6912391

Claim:
A method of controlling hand over in a mobile communication system comprising a mobile station, a plurality of base stations each communicating with the mobile station, and a base station controller controlling the plurality of base stations, said method comprising: each of the plurality of base stations transmitting a perch channel signal which decides a range of a cell (sector) to be covered by one base station to the mobile station; the mobile station measuring a received level of the perch channel signal when the signal is received from the plurality of base stations, and based on a result of the measurement, transmitting information on a hand over source cell (source sector), a hand over destination candidate cell (candidate sector) and on the received level of the perch channel signal associated with these cells (sectors) to each of the base stations; each of the base stations transmitting the information to the base station controller when the information is received from the mobile station; and when the base station controller receives the information from the mobile station through the plurality of base stations, the controller performing the steps of: reading a correction value stored in a storage unit based on information on the hand over source cell (source sector) and the hand over destination candidate cell (candidate sector) contained in the information, the correction value being used to correct a reference value of the received signal level necessary for controlling the hand over; correcting the reference value with the correction value; and controlling the hand over based on the corrected reference value and the received signal level of the perch channel signal contained in the information from the mobile station.