Importance

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Abstract

Disclosed are a medium protection-based method and device for MU transmission in a wireless LAN. The medium protecting method for MU transmission in a wireless LAN can comprise the steps of: receiving, by an STA, an RTS frame transmitted on the basis of DL MU transmission by an AP; and determining, by the STA, whether to configure an NAV on the basis of an RA field of the RTS frame, wherein if the RTS frame is an MU RTS frame for acquiring MU TXOP, the RA field includes an RA control field and a plurality of RA simple identification fields, the MU TXOP indicates a time resource having a transmission right for DL MU transmission of downlink data, the RA control field includes information for indicating that the RTS frame is an MU RTS frame transmitted to acquire the MU TXOP, and each of the plurality of RA simple identification fields can include identification information of each of the plurality of STAs.

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First Claim