A communication method of transmitting data from a mobile station to a fixed station via a first dedicated physical data channel and a second dedicated physical data channel which are disposed in an uplink direction from the mobile station to the fixed station, the communication method comprises: - a transmit power margin estimating step of estimating a transmit power margin being a transmit power to be assigned to the data transmission via the second dedicated physical data channel when the data is transmitted via the second dedicated physical data channel, the estimation being performed based on a subtraction of; - the sum total of the powers of all physical channels except the power of the second dedicated physical data channel; from - a maximum transmit power value specifically defined for estimating the transmit power margin, wherein the maximum transmit power value is lower than a value indicating a power capability of the mobile station; - an evaluation step of evaluating a state of each of candidates for E-TFC (E-DCH Transport Format Combination) which is information for controlling the data transmission via the second dedicated physical data channel, the evaluation being performed by using a transmit power margin estimated in the transmit power margin estimating step; - a selecting step of selecting one of E-TFC to be used for the data transmission via the second dedicated physical data channel from the candidates by using scheduling result information regarding to a maximum amount of uplink resource which the mobile station may use and a result of the evaluation in the evaluation step; - a transmission step of transmitting the data to the fixed station using the E-TFC selected in the selecting step; characterized in that the maximum transmit power value is dependent on a spreading factor, SF, of the second dedicated physical data channel. - a transmit power margin estimating step of estimating a transmit power margin being a transmit power to be assigned to the data transmission via the second dedicated physical data channel when the data is transmitted via the second dedicated physical data channel, the estimation being performed based on a subtraction of; - the sum total of the powers of all physical channels except the power of the second dedicated physical data channel; from - a maximum transmit power value specifically defined for estimating the transmit power margin, wherein the maximum transmit power value is lower than a value indicating a power capability of the mobile station; - the sum total of the powers of all physical channels except the power of the second dedicated physical data channel; from - a maximum transmit power value specifically defined for estimating the transmit power margin, wherein the maximum transmit power value is lower than a value indicating a power capability of the mobile station; - an evaluation step of evaluating a state of each of candidates for E-TFC (E-DCH Transport Format Combination) which is information for controlling the data transmission via the second dedicated physical data channel, the evaluation being performed by using a transmit power margin estimated in the transmit power margin estimating step; - a selecting step of selecting one of E-TFC to be used for the data transmission via the second dedicated physical data channel from the candidates by using scheduling result information regarding to a maximum amount of uplink resource which the mobile station may use and a result of the evaluation in the evaluation step; - a transmission step of transmitting the data to the fixed station using the E-TFC selected in the selecting step; characterized in that the maximum transmit power value is dependent on a spreading factor, SF, of the second dedicated physical data channel.