A wireless communication system for autonomously performing radio resource management characterized by comprising: a first base station configured to transmit a first downlink signal by using a first radio resource and to communicate with a first mobile station within a first cell; and a second base station configured to transmit a second downlink signal by using a second radio resource and to communicate with a second mobile station within a second cell, wherein each of the first and second base stations (3, 4) is configured to transmit cell attribute information indicating a cell attribute, the cell attribute information includes information about a transmission power value of a downlink signal transmitted by a transmission-source base station, and the wireless communication system further comprises a third base station configured to receive the cell attribute information, to perform radio resource management based on the cell attribute information, and to communicate with a third mobile station within a third cell, wherein each of the first and second mobile stations (9-1, 9-2) is configured to select, from among the first and second cells (6, 7), a cell for which a transmission power value of the downlink signal is smaller among the two transmission power values of the first and second cells (6, 7), and to communicate with a base station corresponding to the selected cell, and the third base station is configured to select radio resource used in one of the first and second cells (6, 7), for which a transmission power value of the downlink signal is larger among the two transmission power values of the first and second cells (6, 7), preferentially over radio resource used in the other cell for which a transmission power value of the downlink signal is smaller. a first base station configured to transmit a first downlink signal by using a first radio resource and to communicate with a first mobile station within a first cell; and a second base station configured to transmit a second downlink signal by using a second radio resource and to communicate with a second mobile station within a second cell, wherein each of the first and second base stations (3, 4) is configured to transmit cell attribute information indicating a cell attribute, the cell attribute information includes information about a transmission power value of a downlink signal transmitted by a transmission-source base station, and the wireless communication system further comprises a third base station configured to receive the cell attribute information, to perform radio resource management based on the cell attribute information, and to communicate with a third mobile station within a third cell, wherein each of the first and second mobile stations (9-1, 9-2) is configured to select, from among the first and second cells (6, 7), a cell for which a transmission power value of the downlink signal is smaller among the two transmission power values of the first and second cells (6, 7), and to communicate with a base station corresponding to the selected cell, and the third base station is configured to select radio resource used in one of the first and second cells (6, 7), for which a transmission power value of the downlink signal is larger among the two transmission power values of the first and second cells (6, 7), preferentially over radio resource used in the other cell for which a transmission power value of the downlink signal is smaller.