Transmitting method, receiving method, transmitting apparatus, and receiving apparatus

A reception apparatus using Orthogonal Frequency Division Multiplexing (OFDM), the reception apparatus comprising:

• a processor;
• and
• a non-transitory memory coupled to the processor,
• wherein the processor:
• receives a frame, the frame including a first preamble period, a second preamble period, and a data period, the first preamble period including a subcarrier frequency spacing that is four times larger than a subcarrier frequency spacing in the second preamble period and the data period, the data period being a period in which one or more frequency regions are defined, each of the one or more frequency regions including subcarriers and being provided for transmitting data for the reception apparatus or another reception apparatus;
• demodulates control data symbols transmitted in the first preamble period to obtain control data, the control data indicating one of the one or more frequency regions allocated to the reception apparatus;
• and
• demodulates the data symbols transmitted in the data period to obtain received data.

A reception method executed by a reception apparatus using Orthogonal Frequency Division Multiplexing (OFDM), the reception method comprising:

• receiving a frame, the frame including a first preamble period, a second preamble period, and a data period, the first preamble period including a subcarrier frequency spacing that is four times larger than a subcarrier frequency spacing in the second preamble period and the data period, the data period being a period in which one or more frequency regions are defined, each of the one or more frequency regions including subcarriers and being provided for transmitting data for the reception apparatus or another reception apparatus;
• demodulating, by using the processor, control data symbols transmitted in the first preamble period to obtain control data, the control data indicating one of the one or more frequency regions allocated to the reception apparatus;
• and
• demodulating, by using the processor, the data symbols transmitted in the data period to obtain received data.