Patent ID: 7184769

Claim:
A mobile communication system including one or more base stations each of which has one or more service areas, and a mobile station, wherein each of said base stations comprises: means for determining information about an addition threshold value and/or a deletion threshold value for diversity handover of each service area; means for transmitting said information about an addition threshold value and/or a deletion threshold value for diversity handover of each service area to said mobile station; and means for transmitting in each service area a reference signal to said mobile station, and wherein said mobile station comprises: means for receiving said information about an addition threshold value and/or a deletion threshold value for diversity handover from the base station; means for receiving said reference signal from the base station, and for measuring its received quality; and means for making, for each service area, a decision as to whether the service area is to be selected as a candidate of a service area in which said mobile station will start new communication, and/or as a candidate of a service area in which said mobile station will stop current communication, by comparing the received quality of the reference signal of the service area with an addition threshold value and/or a deletion threshold value obtained from information about an addition threshold value and/or a deletion threshold value for diversity handover of the service area.