In the embodiment of FIG. 13, the base wireless communication terminal signals a service period for a TWT operation by transmitting a beacon frame including a TWT element. The wireless communication terminal receiving the beacon frame determines the MU EDCA parameter set start time point and the end time point based on the TWT element. Specifically, the wireless communication terminal receiving the beacon frame determines the MU EDCA parameter set application start time point based on the start time point of the service period indicated by the TWT element. In addition, the wireless communication terminal receiving the beacon frame determines the MU EDCA parameter set application end time point based on the start time point of the service period indicated by the TWT element. In another specific embodiment, the wireless communication terminal receiving the beacon frame determines the MU EDCA parameter set application end time point based on the end time point of the service period indicated by the TWT element.
The MU EDCA parameter is a channel access condition that is more disadvantageous than a typical EDCA parameter set. Therefore, the wireless communication terminal needs to terminate the MU EDCA parameter set application. The wireless communication terminal switches the MU EDCA parameter set to the normal EDCA parameter set when terminating the MU EDCA parameter application. This will be described with reference to FIGS. 14 to 15.
FIG. 14 shows an operation in which a wireless communication terminal according to an embodiment of the present invention terminates the MU EDCA parameter application.
