Patent ID: 7457622

Claim:
In a mobile communication system having a plurality of radio base stations and a mobile station, a radio base station selection method in which a radio base station to start communicating with a mobile station is selected from among adjacent radio base stations capable of communicating with the mobile station, the method comprising the steps of: measuring, by a mobile station, a reception quality of each of a plurality of adjacent radio base stations; receiving, by a radio base station in service, a signal including a connection request and the measured reception quality of each of the plurality of adjacent radio base stations from the mobile station; transmitting, by the radio base station in service, to each adjacent radio base station, but not to the mobile station, a message requesting a radio channel available capacity report; making the radio channel available capacity report by each adjacent radio base station, but not by the mobile station; sending the radio channel available capacity report directly from said each adjacent radio base station, but not from the mobile station, to the radio base station in service, each radio channel available capacity report including an available bandwidth of the respective adjacent radio base station; making, by the radio base station in service, a table including the reception qualities measured by the mobile station and the radio channel available capacity reports directly obtained from the adjacent radio base stations; selecting, by the radio base station in service, but not by a radio base station control station or an adjacent radio base station, a radio base station to be connected to the mobile station, based on the table; and notifying the mobile station of information necessary for communicating with the selected radio base station.