A code sequence transmission method capable of improving system throughput and user throughput by improving power utilization efficiencies of a control channel and a data channel including a plurality of signals having different required qualities is provided. In a mobile station, a bit sequence of a TFCI is transmitted within one frame a plurality of times repeatedly, the bit sequence of each TFCI is multiplied by one bit of a bit sequence of an SI, a multiplication result is transmitted. It is thereby possible to transmit both the TFCI and the SI without providing a signal field of the SI in each frame.