| 摘要 |
A radio base station 10 includes a reception quality calculation unit 31 for calculating a reception quality based on a signal received from a radio terminal, a difference information obtaining unit 33 for obtaining difference information between maximum transmit power and current transmit power, transmitted from the radio terminal, a minimum requirement calculation unit 41 for calculating a minimum requirement indicating a relation between the number of resource blocks and a modulation type, necessary to ensure a minimum level of quality required for communication with the radio terminal, wherein the resource block is a unit block with a predetermined frequency bandwidth, and control units (46, 47) for controlling at least one of the number of resource blocks, the modulation type and transmit power for uplink of the radio terminal based on the reception quality calculated by the reception quality calculation unit 31 and the difference information obtained by the difference information obtaining unit 33 such that the minimum requirement calculated by the minimum requirement calculation unit 41 is maximally met. Thereby, the radio terminal can be adaptively and efficiently controlled to reliably ensure a required communication quality without consuming power excessively.
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