Patent ID: 8654692

Claim:
A radio transmission apparatus adopted in a radio communication system in which a single-carrier transmission and a multicluster transmission are both used, the radio transmission apparatus comprising: a determining section that determines a method of multiplexing a data signal and a control information signal based on a number of carrier groups used to transmit the data signal; a multiplexing section that multiplexes the data signal and the control information signal to generate a multiplexed signal based on the determined multiplexing method; and a transmission section that transmits the multiplexed signal to a radio reception apparatus, wherein the determining section uses a frequency division multiplexing as the multiplexing method when the number of carrier groups is equal to or more than a first threshold, uses a time division multiplexing as the multiplexing method when the number of carrier groups is less than the first threshold and a margin of transmission power is less than a second threshold, and uses a frequency division multiplexing as the multiplexing method when the number of carrier groups is less than the first threshold and a margin of transmission power is equal to or more than the second threshold.