Mobile station and communications method

Abstract

In order to define uniquely a transmission control operation of a mobile station in accordance with the present invention at the time of a E-DCH transmission and to increase the efficiency of the operation of a communications system, the mobile station includes a transmission control means for, for each of a first physical data channel via which user data transmitted via a transport channel from an upper layer are transmitted to a fixed station and a second physical data channel which is an extension of the first physical data channel, selecting transmission control information including a transmission rate depending upon the user data, a multiplex modulation means for performing multiplex modulation on transmission data by using the transmission control information selected by the transmission control means and the amplitude coefficients of the first physical data channel and the second physical data channel, and a transmit power control means for performing control of the transmit power of a transmitting means which amplifies the transmission data in such a manner that the transmission data has predetermined transmit power, and which transmits the transmission data, and the transmission control means judges whether the transmit power in a case of not transmitting a control channel via which control data about control of the second physical data channel are transmitted exceeds a maximum transmit power value, and selects the transmission control information about the first physical data channel.

Dependencies are inferred from the claim text.