A transmitting station according to the present invention includes a transmitting antenna capable of changing an orientation direction thereof and a control unit to control the orientation direction of the transmitting antenna in accordance with the orientation direction of the transmitting antenna, the orientation direction of the transmitting antenna and a receiving station for receiving data transmitted from the transmitting antenna being determined on the basis of an estimated value of a received signal quality at a receiving station that is a candidate of the receiving station for receiving the data transmitted from the transmitting antenna and an estimated value of an interference amount caused by reception of the data in another radio communication system.