Mobile station, radio base station, and communication control method for carrier aggregation

The disclosed mobile station (UE) is equipped with: measurement units (102) that measure the wireless quality of a currently communicating cell or a neighboring cell for each carrier among at least two carriers; a determination unit (104) that determines whether or not the wireless base station (eNB) should be notified of the measurement results of the measurement units (102) for each carrier among the at least two carriers; and a transmission unit (106) that transmits the measurement results of the measurement units (102) to the wireless base station (eNB) when the determination unit (104) has determined that the wireless base station (eNB) should be notified of the measurement results of the measurement units (102). Along with the measurement results relating to the carrier for which it has been determined by the determination unit (104) that the wireless base station (eNB) shall be notified of the measurement results of the measurement units (102), the transmission unit (106) transmits measurement results relating to carriers other than said carrier.