CELLULAR RADIO SYSTEM ALLOWING MOBILE STATION TO COMMUNICATE THROUGH BASE STATION CONNECTED VIA CDMA RADIO CHANNEL, AND BASE STATION DEVICE AND MOBILE STATION DEVICE USED IN THE SAME

摘要

A cellular radio system wherein a CPU (42a) monitors a channel utilization rate for each of a plurality of radio frequencies allocated to each of a plurality of base stations (BS). When a difference among channel utilization rates determined for the plurality of radio frequencies allocated to a base station (BS) indicates a predetermined condition, the CPU (42a) exchanges a candidate radio frequency to be used by a predetermined mobile station (MS) among mobile stations (MS) that are present in a cell formed by the base station (BS) and in an idling state for reception to a radio frequency to a radio frequency whose channel utilization rate is in the predetermined condition.