Communication apparatus and communication method

A communication apparatus comprising:

• an allocating section configured to allocate one cluster or a plurality of clusters to a terminal, the plurality of clusters being inconsecutive in a frequency domain, and each cluster being comprised of resource blocks that are consecutive in the frequency domain;
• and
• a transmitting section configured to transmit, to the terminal, downlink control information including resource block assignment information that indicates the resource blocks of which the allocated one cluster or the allocated plurality of clusters are comprised,
• wherein the downlink control information is transmitted with a downlink control information (DCI) format that is used for scheduling in uplink, the DCI format having a size, which is different according to the number of codewords, the number of layers, or the number of streams and which is same, regardless of a number of clusters allocated to the terminal, for each number of codewords, each number of layers, or each number of streams, and
• wherein the DCI format has a same size according to a maximum value of the number of clusters for each number of codewords, each number of layers, or each number of streams.