Patent ID: 8406700

Claim:
A mobile station in a mobile communication system in which, a radio base station transmits data after transmission of a preamble signal and, after transmission of a signal and before transmission of a subsequent preamble signal from the radio base station, the mobile station transmits to the radio base station, reception quality of the signal transmitted from the radio base station, whereby a transmission parameter for data transmitted to the mobile station after transmission of the subsequent preamble signal can be changed, the mobile station comprising: a reception quality generating unit that generates the reception quality based on both (a) a reception quality that is measured, based on a pilot signal transmitted after the preamble signal, for the data transmitted after the preamble signal, and (b) a reception quality that is measured for the preamble signal, wherein the reception qualities are weighted and synthesized in a manner where a reception quality later in time sequence is given a heavier weight, the data is data transmitted to the mobile station, and the reception quality generating unit interpolates a reception quality of data transmitted to another mobile station, based on a reception quality of data transmitted to the mobile station.