A control apparatus for wireless communication system includes: a communication unit to obtain, from a base station, information indicating reception quality, at a terminal device, of a signal transmitted on a directional beam from the base station; and a processing unit to determine whether to remove a spot on the basis of the information obtained by the communication unit, the spot being an area irradiated with a directional beam from the base station. If the processing unit determines that the spot is to be removed, the communication unit sends an instruction to remove the spot to the base station or to a master base station of the base station.