A communication processing method for performing communication between a base station having a plurality of sectors and user devices, the communication processing method characterized by comprising: the base station receiving (44; 54) channel state information corresponding to all or some of spare coordinated groups from each of the user devices, wherein the spare coordinated groups correspond to each of the user devices and are selected from a first group including a plurality of coordinated groups arranged in advance, wherein each of the coordinated groups is formed of two or more sectors, and wherein each of the spare coordinated groups includes at least a service sector of best channel quality obtained by measurement of the user device; the base station specifying (45; 55) a user device group corresponding to each of coordinated groups included in each of coordinated group patterns, wherein the sectors of each of the coordinated groups included in a respective coordinated group pattern belong to only one coordinated group of the respective coordinated group pattern, wherein the user device group corresponding to the coordinated group includes user devices of which the corresponding spare coordinated groups include the coordinated group; the base station performing (46; 56) user scheduling on each of the coordinated groups based on channel state information reported by the user devices of the user device group corresponding to the coordinated group; and the base station specifying (47; 57) a user device and a coordinated group pattern to use in transmission based on scheduling results of the coordinated groups, and then performing data transmission based on the specified user device and the specified coordinated group pattern. the base station receiving (44; 54) channel state information corresponding to all or some of spare coordinated groups from each of the user devices, wherein the spare coordinated groups correspond to each of the user devices and are selected from a first group including a plurality of coordinated groups arranged in advance, wherein each of the coordinated groups is formed of two or more sectors, and wherein each of the spare coordinated groups includes at least a service sector of best channel quality obtained by measurement of the user device; the base station specifying (45; 55) a user device group corresponding to each of coordinated groups included in each of coordinated group patterns, wherein the sectors of each of the coordinated groups included in a respective coordinated group pattern belong to only one coordinated group of the respective coordinated group pattern, wherein the user device group corresponding to the coordinated group includes user devices of which the corresponding spare coordinated groups include the coordinated group; the base station performing (46; 56) user scheduling on each of the coordinated groups based on channel state information reported by the user devices of the user device group corresponding to the coordinated group; and the base station specifying (47; 57) a user device and a coordinated group pattern to use in transmission based on scheduling results of the coordinated groups, and then performing data transmission based on the specified user device and the specified coordinated group pattern.