Integrated circuit for receiving downlink control information and transmitting uplink data

An integrated circuit comprising:

• control circuitry which, in operation, controls allocation of 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 transmission circuitry which, in operation, controls transmission, to the terminal, of 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 a number of codewords, a number of layers, or a 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, wherein the size of the DCI format is a total number of bits included in the DCI format.