Provided is a base station for communicating with a mobile station by assigning at least a part of a communication frame including a plurality of wireless communication channels in a frequency direction. The communication frame includes at least one special subframe having a data transmission region available for transmission to the mobile station and a data reception region available for reception from the mobile station, separated from the data transmission region in a time direction. The base station includes an assignment unit 50 for assigning, in the special subframe, the data transmission region for transmission of downlink control information to nearby mobile stations and the data reception region for reception of uplink control information from the nearby mobile stations, and a transmission and reception unit 10 for transmitting the downlink control information in the data transmission region and for receiving the uplink control information in the data reception region.