A station device comprising: a communication unit configured to receive a response frame not including information indicating a transmission source; and a control unit configured to determine whether or not the response frame is a frame transmitted from another device belonging to a same network as the station device, on a basis of information regarding the response frame; wherein the information regarding the response frame is information regarding reception power of the response frame, characterized in that the control unit is configured to determine that the response frame is a frame transmitted from another device belonging to the same network as the station device in a case where the reception power is greater than a threshold; wherein the control unit is configured to set a first transmission suppression period for the same network as the station device in a case of determining that the response frame is a frame transmitted from another device belonging to the same network as the station device, and to set a second transmission suppression period for another network in a case of determining that the response frame is not a frame transmitted from another device belonging to the same network as the station device; wherein the control unit is further configured to, a) in a case where reception power of a subsequent response frame that is received during the first transmission suppression period set on a basis of a previously received response frame is greater than reception power of the previously received response frame, change the first transmission suppression period set by the previously received response frame to the second transmission suppression period, and to set the first transmission suppression period by the subsequent response frame and/or b) in a case where reception power of a subsequent response frame that is received during the first transmission suppression period set on a basis of a previously received response frame is equal to or less than reception power of the previously received response frame, to set the second transmission suppression period by the subsequent response frame. a communication unit configured to receive a response frame not including information indicating a transmission source; and a control unit configured to determine whether or not the response frame is a frame transmitted from another device belonging to a same network as the station device, on a basis of information regarding the response frame; wherein the information regarding the response frame is information regarding reception power of the response frame, characterized in that the control unit is configured to determine that the response frame is a frame transmitted from another device belonging to the same network as the station device in a case where the reception power is greater than a threshold; wherein the control unit is configured to set a first transmission suppression period for the same network as the station device in a case of determining that the response frame is a frame transmitted from another device belonging to the same network as the station device, and to set a second transmission suppression period for another network in a case of determining that the response frame is not a frame transmitted from another device belonging to the same network as the station device; wherein the control unit is further configured to, a) in a case where reception power of a subsequent response frame that is received during the first transmission suppression period set on a basis of a previously received response frame is greater than reception power of the previously received response frame, change the first transmission suppression period set by the previously received response frame to the second transmission suppression period, and to set the first transmission suppression period by the subsequent response frame and/or b) in a case where reception power of a subsequent response frame that is received during the first transmission suppression period set on a basis of a previously received response frame is equal to or less than reception power of the previously received response frame, to set the second transmission suppression period by the subsequent response frame. a) in a case where reception power of a subsequent response frame that is received during the first transmission suppression period set on a basis of a previously received response frame is greater than reception power of the previously received response frame, change the first transmission suppression period set by the previously received response frame to the second transmission suppression period, and to set the first transmission suppression period by the subsequent response frame and/or b) in a case where reception power of a subsequent response frame that is received during the first transmission suppression period set on a basis of a previously received response frame is equal to or less than reception power of the previously received response frame, to set the second transmission suppression period by the subsequent response frame.