Patent ID: 8891390

Claim:
A wireless base station comprising: at least one antenna or an antenna group which communicates with terminals in a plurality of frequency bands; a communication control unit that assigns an individual wireless resource in a frame, to a terminal located in the wireless base station's cell area, and that controls transmitting and receiving of data to and from the terminal using the wireless resource; and a beam pattern determination unit including a first beam pattern determination unit that determines transmission power of the antenna or antenna group, where determined transmission power is based on a signal reported by the terminal, with the signal including information of interference power that the terminal experiences, and is further based on a direction in which the signal arrives at the wireless base station, and a second beam pattern determination unit that estimates a number of antennas of the wireless base station necessary for communication with the terminal based on communication requirement information of the terminal, and that further determines the transmission power of the antenna or antenna group of the wireless base station in accordance with both the estimated said number of antennas of the wireless base station and received power of the transmission signal reported by the terminal.