A wireless communication device comprising: a receiver configured to receive a trigger frame for random access including information to specify a plurality of frequency components: controlling circuitry configured to determine whether a transmission right to respond to the trigger frame for random access is acquired based on a back off count value randomly selected from a contention window for Uplink Orthogonal Frequency Division Multiple Access, UL-OFDMA, and a number of the frequency components specified in the trigger frame for random access; and a transmitter configured to transmit, in a case of the transmission right to respond to the trigger frame for random access being acquired, a response frame (512, 514, 515) to the trigger frame for random access using a frequency component selected from the plurality of frequency components, wherein the receiver determines whether transmission of the response frame (512, 514, 515) has succeeded or failed, wherein the receiver determines that transmission of the response frame (512, 514, 515) has succeeded when the receiver has received a second response frame (502, 507, 541) to the response frame (512, 514, 515) and determines that transmission of the response frame (512, 514, 515) has failed when the receiver has not received the second response frame (502, 507, 541), said wireless communication device characterised in that the receiver is configured to receive a frame including a first update value and a second update value for the contention window for UL-OFDMA, the first update value and the second update value depending on a number of wireless communication terminals which have successfully transmitted the response frames (512, 514, 515), the first update value is for a wireless communication terminal in which the transmission of the response frame (512, 514, 515) has failed, the second update value is for a wireless communication terminal in which the transmission of the response frame (512, 514, 515) has succeeded, and the frame is a management frame or a control frame and the controlling circuitry is configured to update the contention window for UL-OFDMA based on the first update value and the second update value according to whether the transmission of the response frame (512, 514, 515) has succeeded or failed. controlling circuitry configured to determine whether a transmission right to respond to the trigger frame for random access is acquired based on a back off count value randomly selected from a contention window for Uplink Orthogonal Frequency Division Multiple Access, UL-OFDMA, and a number of the frequency components specified in the trigger frame for random access; and a transmitter configured to transmit, in a case of the transmission right to respond to the trigger frame for random access being acquired, a response frame (512, 514, 515) to the trigger frame for random access using a frequency component selected from the plurality of frequency components, wherein the receiver determines whether transmission of the response frame (512, 514, 515) has succeeded or failed, wherein the receiver determines that transmission of the response frame (512, 514, 515) has succeeded when the receiver has received a second response frame (502, 507, 541) to the response frame (512, 514, 515) and determines that transmission of the response frame (512, 514, 515) has failed when the receiver has not received the second response frame (502, 507, 541), said wireless communication device characterised in that the receiver is configured to receive a frame including a first update value and a second update value for the contention window for UL-OFDMA, the first update value and the second update value depending on a number of wireless communication terminals which have successfully transmitted the response frames (512, 514, 515), the first update value is for a wireless communication terminal in which the transmission of the response frame (512, 514, 515) has failed, the second update value is for a wireless communication terminal in which the transmission of the response frame (512, 514, 515) has succeeded, and the frame is a management frame or a control frame and the controlling circuitry is configured to update the contention window for UL-OFDMA based on the first update value and the second update value according to whether the transmission of the response frame (512, 514, 515) has succeeded or failed.