A wireless communication system comprising a base station device and a mobile station device configured to communicate with the base station device using a Multicast/Broadcast over Single Frequency Network, MBSFN, sub-frame and a unicast sub-frame, the MBSFN sub-frame being used for transmitting Multimedia Broadcast/Multicast Service, MBMS, data using a multicast channel, and the unicast sub-frame being used for transmitting unicast data using a downlink shared data channel, the wireless communication system characterized in that: the base station device comprises a transmission processor configured to: transmit sub-frame candidate information to the mobile station device using the downlink shared data channel, the sub-frame candidate information specifying all sub-frames to be reserved as the MBSFN sub-frames, transmit scheduling information to the mobile station device using the multicast channel, the scheduling information specifying from among the sub-frames specified by the sub-frame candidate information, sub-frames to be used for transmitting the MBMS data, transmit downlink control information to the mobile station device using a downlink control channel including downlink control information indicating radio resource assignment for the downlink shared data channel, and transmit the MBMS data using the multicast channel included in the sub-frames specified by the scheduling information, and transmit the unicast data using the downlink shared data channel included together with the downlink control channel in one of the sub-frames which are specified by the sub-frame candidate information, but which are not specified by the scheduling information, and the mobile station device comprises a reception processor configured to receive from the base station device using the downlink shared data channel, sub-frame candidate information that specifies all sub-frames to be reserved as the MBSFN sub-frames; receive from the base station device using the multicast channel, scheduling information that specifies from among the sub-frames specified by the sub-frame candidate information, sub-frames for transmitting the MBMS data; detect from the one of the sub-frames which are specified by the sub-frame candidate information, but which are not specified by the scheduling information, a downlink control channel including downlink control information, the downlink control information indicating radio resource assignment for the downlink shared data channel; and decode the downlink shared data channel in the one of the sub-frames which are specified by the sub-frame candidate information, but which are not specified by the scheduling information, in a case that the downlink control channel including the downlink control information is detected. transmit sub-frame candidate information to the mobile station device using the downlink shared data channel, the sub-frame candidate information specifying all sub-frames to be reserved as the MBSFN sub-frames, transmit scheduling information to the mobile station device using the multicast channel, the scheduling information specifying from among the sub-frames specified by the sub-frame candidate information, sub-frames to be used for transmitting the MBMS data, transmit downlink control information to the mobile station device using a downlink control channel including downlink control information indicating radio resource assignment for the downlink shared data channel, and transmit the MBMS data using the multicast channel included in the sub-frames specified by the scheduling information, and transmit the unicast data using the downlink shared data channel included together with the downlink control channel in one of the sub-frames which are specified by the sub-frame candidate information, but which are not specified by the scheduling information, and the mobile station device comprises a reception processor configured to receive from the base station device using the downlink shared data channel, sub-frame candidate information that specifies all sub-frames to be reserved as the MBSFN sub-frames; receive from the base station device using the multicast channel, scheduling information that specifies from among the sub-frames specified by the sub-frame candidate information, sub-frames for transmitting the MBMS data; detect from the one of the sub-frames which are specified by the sub-frame candidate information, but which are not specified by the scheduling information, a downlink control channel including downlink control information, the downlink control information indicating radio resource assignment for the downlink shared data channel; and decode the downlink shared data channel in the one of the sub-frames which are specified by the sub-frame candidate information, but which are not specified by the scheduling information, in a case that the downlink control channel including the downlink control information is detected.