A scheduling method in which a communication apparatus communicates data with a plurality of users by preferentially allocating a data sequence to a default subchannel segment that is different from another-cell allocation subchannel segment. As many data sequences as can be allocated to the default subchannel segment are selected and the selected data sequences allocated to the default subchannel segment. In downlink scheduling, the data sequences are selected in order from a data sequence subjected to a maximum level of interference from an adjacent base station. In uplink scheduling, the data sequences are selected in order from a data sequence that causes a maximum level of interference to the adjacent base station because of data communication. A data sequence not allocated to the default subchannel segment is allocated to the other-cell allocation subchannel segment when allocation of all the data sequences to the default subchannel segment fails.