1. A wireless communication terminal communicating wirelessly, the terminal comprising:a transceiver configured to receive and transmit a wireless signal; and
wherein the processor is configured to:
receive, through the transceiver, a first trigger frame from a base wireless communication terminal,
transmit, through the transceiver, a first response frame in response to the first trigger frame to the base wireless communication terminal, and
stop enhanced distributed channel access function (EDCAF) corresponding to the first response frame when the wireless communication terminal receives an ACK for the first response frame, wherein the EDCAF is a function for determining a time at which a frame in a queue is transmitted and is defined per access category.