<p>A base station comprises a first reception timing detecting part that detects the reception timing of a packet received from a first mobile station existent in a first sector; a second reception timing detecting part that detects the reception timing of a packet received from a second mobile station existent in a second sector; a transmission timing deciding part that decides, based on the reception timings detected by the first and second reception timing detecting parts, a transmission timing; a control information generating part that generates transmission timing control information for the first and second mobile stations; and a radio resource assigning part that assigns orthogonal radio resources to the first and second mobile stations.</p>
