Patent ID: 8705470

Claim:
A radio base station that communicates with a mobile station, comprising: a power estimate unit that estimates a transmission power of an uplink signal transmitted by the mobile station, based on power headroom reported from the mobile station; a transmission format determination unit that determines a transmission bandwidth and a transmission frequency of the uplink signal as a transmission format of the uplink signal transmitted by the mobile station; and a transmission instruction unit that instructs the mobile station to transmit the uplink signal by using the determined transmission format, wherein the transmission format determination unit determines the transmission bandwidth of the uplink signal based on an estimation value of the transmission power, and determines the transmission frequency of the uplink signal based on information relating to a cell with which the mobile station communicates, the transmission format determination unit decreases the transmission bandwidth of the uplink signal so that the estimated transmission power becomes equal to or less than a maximum transmission power, and the transmission format determination unit changes a scheme for determining resource blocks to be decreased based on a cell ID, when the transmission bandwidth of the uplink signal is determined to be decreased.