A radio communication system, scheduling method, radio base station device, and radio communication terminal all enabling improvement of the system throughput. The radio base station device (400) comprises a signal demultiplexing section (420), an interference/noise power measuring section (425), and scheduler section (430). The signal demultiplexing section (420) acquires information representing the net reception power of the signal which is transmitted from a mobile terminal and from which the influences of the interference and the noise power are removed. The interference/noise power measuring section (425) measures the interference and noise power components of the uplink. The scheduler section (430) carries out uplink band allocation and MCS selection according to the information representing the net reception power and the uplink interference and noise power components. On the basis of the net reception power and the uplink interference and noise power components, the uplink communication environment can be accurately grasped, and the uplink band allocation can be carried out according to these parameters. Hence, since the uplink scheduling can be precisely carried out, the system throughput can be improved.