AP 100-1 #1 transmits a signal including modulation scheme information to STA 200-1 #1. In addition, the signal includes request transmission power information and information in which allowance of another signal for signal reception in the self-device is specified (hereinafter also referred to as allowance signal information). Specifically, in a case in which transmission of STA 200-1 #1 is permitted, the control unit 130 generates modulation scheme information indicating a modulation scheme, request transmission power information indicating transmission power, and the allowance signal information which are caused to be used by STA 200-1 #1. Then, the communication unit transmits a signal including the generated modulation scheme information, request transmission power information, and allowance signal information (hereinafter also referred to as trigger notification information) (hereinafter also referred to as a trigger signal) to STA 200-1 #1.

For example, the modulation scheme information is modulation and coding set (MCS) information. In addition, the allowance signal information includes the degree of interference by another signal to be allowed (hereinafter also referred to as an allowance interference level) or the degree of reception power of another signal to be allowed (hereinafter also referred to as a reception power allowable degree). Moreover, the trigger notification information includes, for example, a PHY header, a MAC header, or a payload. In addition, the trigger notification information may be generated whenever transmission to STA 200-1 #1 is permitted. In addition, a trigger signal including the trigger notification information may include a BSS identifier of the self-device.