Patent ID: 8817714

Claim:
A communication system comprising: a base station device; and a mobile station device, wherein in case that the base station device and the mobile station device perform communication using a plurality of system bands aggregately, each of the plurality of the system bands having guard bands at the both sides and a different carrier frequency, the guard bands being never mapped with any data channel by the base station, a synchronization signal and a physical broadcast channel being inserted into at least any one of the plurality of the system bands, the physical broadcast channel being a channel including broadcast information, the base station device is configured to receive channel quality indicators of subbands within each of the plurality of the system bands, the mobile station device is configured to perform a synchronization procedure using the synchronization signal, the mobile station device is further configured to acquire the broadcast information from the physical broadcast channel, and the mobile station device is further configured to feed back, to the base station device, the channel quality indicators of the subbands within each of the plurality of the system bands, wherein each of the subbands is a set of contiguous resource blocks within each of the plurality of the system bands, the number of the resource blocks within a subband among the subbands is based on a frequency bandwidth of a system band among the plurality of the system bands, and information indicating the frequency bandwidth of each of the plurality of the system bands is provided to the mobile station by the base station.