A mobile station UE includes: a measuring unit which measures the radio quality in a serving cell and a peripheral cell from a radio base station eNB; and a determining unit which determines whether to notify the measurement result. When the mobile station UE is in the discontinuous reception state, the determining unit determines whether to notify the measurement result in accordance with the radio quality in the measured serving cell and the peripheral cell and a parameter for the discontinuous reception state. When the mobile station UE is not in the discontinuous reception state, the determining unit determines whether to notify the measurement result in accordance with the radio quality in the measured serving cell and the peripheral cell and a parameter for the continuous reception state.