Patent ID: 8849330

Claim:
A radio base station forming a predetermined cell or sector, assigning a radio resource to a radio terminal, and performing a communication with the radio terminal, wherein a radio resource corresponding to the predetermined cell or sector includes a radio resource for transmitting control information and a radio resource for transmitting user data, the radio base station comprising: a first acquisition unit configured to acquire an average quality of a radio resource for transmitting user data included in the radio resource corresponding to the predetermined cell or sector; a second acquisition unit configured to acquire at least either one of an utilization ratio of a radio resource for transmitting control information or an utilization ratio of a radio resource for transmitting user data, included in a radio resource corresponding to other cell or other sector formed by other radio base station, from the other radio base station; an estimation unit configured to estimate a quality of a radio resource for transmitting control information included in the radio resource corresponding to the predetermined cell or sector based on the average quality of the radio resource for transmitting user data acquired by the first acquisition unit, and at least either one of the utilization ratio of the radio resource for transmitting control information or the utilization ratio of the radio resource for transmitting user data acquired by the second acquisition unit; and an assignment unit configured to assign the radio resource for transmitting control information to the radio terminal based on the estimated quality of the radio resource for transmitting control information.