obtaining, by a first station (STA), first information including a Multi-User (MU) Enhanced Distributed Channel Access (EDCA) parameter set which is related to an Uplink (UL) MU transmission of the first STA;

transmitting, by the first STA, an Association Request frame to a second STA, wherein the Association Request frame includes first capability information related to whether the first STA supports priority access related to communicating traffic with a higher priority;

receiving, by the first STA, an Association Response frame from the second STA, wherein the Association Response frame includes second capability information related to whether the second STA supports the priority access;

transmitting, by the first STA, a request signal related to the priority access to the second STA;

based on the request signal, receiving, by the first STA, a response signal related to priority access from the second STA, wherein the response signal includes first information identifying a link related to the priority access and second information containing a parameter used for the priority access on the link; and

managing, by the first STA, an EDCA parameter of the first STA based on the priority access, wherein the first STA ignores updating the EDCA parameter based on the MU EDCA parameter set and updates the EDCA parameter based on an EDCA parameter set used for the priority access while the priority access is enabled.