There are provided a method for controlling communication of a radio terminal with a radio base station at transmission power granted by the radio base station at a request of the radio terminal to the radio base station. The radio terminal, allocates, during communication through an uplink data channel (E-DPDCH) at first transmission power granted by the radio base station, at least part of second transmission power of an uplink control channel (HS-DPCCH) to the uplink data channel (E-DPDCH) by controlling a transmission state of the uplink control channel (HS-DPCCH); and requests the radio base station to increase-the first transmission power for the uplink data channel (E-DPDCH) in accordance with the allocating.