Patent ID: 8320495

Claim:
A radio communication method in reverse link by multicarrier using at least a first carrier and a second carrier that is adjacent to the first carrier with a predetermined frequency interval, wherein a transmission power value of the first carrier is set to decrease in accordance with decrease in a data rate of data to be transmitted via the first carrier, and a transmission power value of the second carrier is set to decrease in accordance with decrease in a data rate of data to be transmitted via the second carrier, the radio communication method comprising performing in a radio communication terminal the steps of: calculating a transmission power difference between the transmission power value of the first carrier and the transmission power value of the second carrier; determining whether or not the transmission power difference exceeds a threshold which indicates a maximum transmission power difference allowable between the first carrier and the second carrier; and decreasing the data rate for transmission via one of the first carrier and the second carrier that has the higher transmission power value, when the transmission power difference exceeds the maximum transmission power difference.