Provided is a radio resource allocation method of allocating common radio resources shared among a plurality of radio stations or a plurality of sectors to each of the plurality of radio stations or each of the plurality of sectors. The method includes defining, as a frame set, a given number of radio frames for repeatedly providing the common radio resources along a time axis, defining, as radio resource units, minimum units obtained by dividing the common radio resources provided by the frame set in units of the radio frames and in units of sub-channel groups, and allocating at least one of the radio resource units to each of the plurality of radio stations or the each of the plurality of sectors.