In addition, STA 200-1 #1 transmits the PHY header including the modulation scheme information. In addition, the PHY header includes the BSS identifier, the transmission power information, and the allowance signal information. Specifically, the control unit 230 sets a modulation scheme and transmission power as communication parameters used for transmission destined for AP 100-1 #1 on the basis of the modulation scheme information and the request transmission power information which are the acquired communication information. Then, the communication unit transmits the PHY header including the modulation scheme information regarding the set modulation scheme, the transmission power information regarding the set transmission power, the acquired allowance signal information, and the BSS identifier (hereinafter also referred to as response header information) and a signal including the frame (hereinafter also referred to as a response signal) with communication parameters to be set.

Moreover, transmission power set on the basis of the request transmission power information may be different from transmission power specified from the request transmission power information. For example, transmission power used for transmission of the PHY header, that is, transmission destined for AP 100-1 #1 may be different from transmission power specified from the request transmission power information within an allowed range. Moreover, in this case, the request transmission power information included in the PHY header is replaced with information in which the transmission power used for transmission of the PHY header is specified.

(Function of STA #2)

Next, functional details of STA 200-1 #2 serving as the second wireless communication device will be described.