Wireless communication control device and wireless communication control method to coordinate reference signal waveforms

A radio communication control apparatus referred to as a first radio communication control apparatus, comprising:

• control circuitry, which, in operation, makes, a waveform of a reference signal to be transmitted in coordination with a second radio communication control apparatus to a radio communication apparatus, different, in at least one of a frequency domain and a time domain, from a waveform of the reference signal to be transmitted by the second radio communication control apparatus to the radio communication apparatus;
• and
• transmission circuitry, which, in operation, transmits the reference signal, wherein,
• the control circuitry makes the waveform of the reference signal different, in both of the frequency domain and the time domain, from the waveform of the reference signal to be transmitted by the second radio communication control apparatus to the radio communication apparatus, in a first case where a total number of antennas through which the reference signal is transmitted is greater than a threshold value, and
• the control circuitry makes the waveform of the reference signal different, not in the frequency domain but in the time domain from the waveform of the reference signal to be transmitted by the second radio communication control apparatus to the radio communication apparatus, in a second case where the total number of antennas through which the reference signal is transmitted is not greater than the threshold value.