A wireless communication system according to the present invention includes a first base station forming a unicast area and a second base station forming a multicast area. The first base station is provided with a load status reporting unit for reporting the load status of the unicast area of the first base station to the second base station forming the multicast area within a certain distance from the unicast area of the first base station. The second base station is provided with a transmission power controlling unit for controlling, based on the reported load status of the unicast area, the transmission power of a signal transmitted in the multicast area of the second base station.