Communication apparatus and transmission method for transmitting a demodulation reference signal

An integrated circuit, comprising:

• reception circuitry, which, in operation, controls receiving control information indicating a number of symbols on which a Demodulation Reference Signal (DMRS) is to be mapped;
• and
• transmission circuitry, which, in operation, controls transmitting a signal in a multiple consecutive time units, each of the multiple consecutive time units including multiple time slots;
• wherein the DMRS is mapped to each of multiple non-consecutive sets in the multiple consecutive time units, a number of symbols in each of the multiple non-consecutive sets being determined based on the control information,
• the number of symbols of each of the multiple non-consecutive sets is less than 14 symbols regardless of a number of the multiple consecutive time units,
• the symbols of each of the multiple non-consecutive sets are symbols other than sounding reference signal (SRS) symbol candidates, and
• a number of the multiple consecutive time units is different for each of numbers of subcarriers to be mapped.