1. A wireless communication device, comprising:a receiver configured to receive a first frame instructing the wireless communication device to perform uplink multi-user transmission; and
a transmitter is configured to transmit a second frame in the uplink multi-user in response to the first frame; and
controlling circuitry configured to set a timer upon receiving the first frame, and change a value of a first parameter of accessing a wireless medium when the timer times out,
wherein the receiver is configured to receive a third frame including information that indicates a value for setting the timer,
wherein the controlling circuit is configured to set the timer based on the information included in the third frame, and
wherein the first parameter is a parameter used for determination of a duration of carrier sensing on the wireless medium.