Method for setting subbands in multicarrier communication, and radio communication mobile station apparatus

A method for receiving data using a mobile station apparatus comprising:

• receiving data in a plurality of blocks, wherein either a first block, to which data indicated by a single resource index are localizedly allocated, or each of a plurality of second blocks, to which data indicated by the single resource index are distributedly allocated, is mapped to each of the plurality of blocks, into which a plurality of consecutive subcarriers in a frequency domain and in a subframe are divided and each of which is comprised of a same number of subcarriers;
• and
• receiving control information that is in a format common to both the first block and the plurality of second blocks,
• wherein the format common to both the first block and the plurality of second blocks includes a first field that indicates whether the first block or the plurality of second blocks is assigned to the mobile station apparatus, a second field that indicates the single resource index indicating data that are allocated to the mobile station apparatus, and a third field that indicates a modulation and coding scheme used for the data mapped to the first block or the plurality of second blocks,
• wherein the plurality of second blocks, to which the data indicated by the single resource index are allocated, are mapped to the plurality of blocks with a predetermined gap such that the data indicated by the single resource index are distributed in the frequency domain, and a resource size for the data indicated by the single resource index in the plurality of second blocks is constant regardless of variation of the predetermined gap, and
• wherein a plurality of data sets indicated by different resource indices are multiplexed in the plurality of second blocks, and a number of the plurality of second blocks used to transmit one of the data sets indicated by the single resource index in the subframe is the same as a number of the plurality of data sets multiplexed in one of the plurality of second blocks.