Patent ID: 7983184

Claim:
A mobile communication device comprising: a reception quality information creation unit which measures reception quality of a downlink signal transmitted from a wireless base station via a downlink at a predetermined time interval in a predetermined section in each frame of the downlink signal and creating reception quality information representing reception quality of the downlink signal on the basis of the measurement result; a transmission unit which transmits the reception quality information created by said reception quality information creation unit to the wireless base station via an uplink; and a reception unit which receives transmission data at a transmission rate set by the wireless base station on the basis of the reception quality information, said reception quality information creation unit comprising a processing delay detection unit which determines whether an end timing of measurement of reception quality has delayed from a predetermined creation start time limit of reception quality information, and a reception quality information output unit which calculates approximate reception quality information on the basis of reception quality measured before the creation start time limit when said processing delay detection unit determines that the end timing has delayed, and outputting calculated approximate reception quality information as the reception quality information.