A control station for controlling a relay station, wherein the control station comprises: a resource control unit to perform assignment of a polarized wave and a frequency of a beam to be emitted by the relay station, the resource control unit further configured to make a determination of assignment information indicating which slot is assigned to which one of a plurality of emission areas for each of a plurality of clusters to be formed by the relay station, each cluster to be formed from two or more of the emission areas, wherein one of the emission areas belongs to multiple ones of the clusters; and a transmission-reception unit to transmit, to the relay station, the assignment information as well as a center coordinate point to be irradiated with the beam and a null point of a beam pattern of the beam, characterized in that the resource control unit is configured to calculate a requested number of slots for each of a plurality of beam locations, wherein beam location refers to a location of the center coordinate point given in units of a distance equal to a resolution of the center coordinate point of each of the emission areas, calculate the requested number of slots, as the sum of the requested numbers of slots at the respective beam locations, of each of the clusters, determine a priority order of the clusters by sorting the clusters in a descending order of the requested number of slots of each of the clusters, determine a priority order of the beam locations belonging to each of the clusters by sorting the requested number of slots for each of the beam locations in a descending order, and determine the assignment information by performing slot assignment determination based on the priority order of the clusters and the priority order of the beam locations for each of the clusters, wherein, for a beam location that is a candidate for assignment, the resource control unit estimates the amount of interference between beams based on the beam pattern and on the distance from an emission area that has a slot already assigned thereto, and thereafter determines slot assignment to achieve a maximum signal to interference and noise power ratio (SINR). a resource control unit to perform assignment of a polarized wave and a frequency of a beam to be emitted by the relay station, the resource control unit further configured to make a determination of assignment information indicating which slot is assigned to which one of a plurality of emission areas for each of a plurality of clusters to be formed by the relay station, each cluster to be formed from two or more of the emission areas, wherein one of the emission areas belongs to multiple ones of the clusters; and a transmission-reception unit to transmit, to the relay station, the assignment information as well as a center coordinate point to be irradiated with the beam and a null point of a beam pattern of the beam, characterized in that the resource control unit is configured to calculate a requested number of slots for each of a plurality of beam locations, wherein beam location refers to a location of the center coordinate point given in units of a distance equal to a resolution of the center coordinate point of each of the emission areas, calculate the requested number of slots, as the sum of the requested numbers of slots at the respective beam locations, of each of the clusters, determine a priority order of the clusters by sorting the clusters in a descending order of the requested number of slots of each of the clusters, determine a priority order of the beam locations belonging to each of the clusters by sorting the requested number of slots for each of the beam locations in a descending order, and determine the assignment information by performing slot assignment determination based on the priority order of the clusters and the priority order of the beam locations for each of the clusters, wherein, for a beam location that is a candidate for assignment, the resource control unit estimates the amount of interference between beams based on the beam pattern and on the distance from an emission area that has a slot already assigned thereto, and thereafter determines slot assignment to achieve a maximum signal to interference and noise power ratio (SINR).