Abstract: Disclosed are a method and apparatus for accessing a secondary channel in a wireless LAN system. The method performed by a first station (STA) in a wireless LAN system, according to an embodiment of the present disclosure, may comprise the steps of: performing a backoff process on one or more first secondary channels on the basis of a state of a primary channel being busy; and transmitting a physical layer protocol data unit (PPDU) on one or more second secondary channels on the basis of expiration of a backoff counter for the one or more first secondary channels.

Abstract: A method and an apparatus for accessing a secondary channel in a wireless LAN system are disclosed. A method performed by a station (STA) according to an embodiment of the present disclosure may comprise the steps of: configuring a network allocation vector (NAV) for a primary channel on the basis of a first frame received via a physical protocol data unit (PPDU) other than an intra basic service set (BSS) PPDU; and attempting to transmit a second frame on one or more secondary channels other than the primary channel.

Abstract: The present disclosure relates to a transmission opportunity (TXOP) sharing procedure in which cooperative access points (APs) participate in a wireless LAN system. According to an embodiment of the present disclosure, a method performed by a station (STA) in a wireless local area network (LAN) system comprises the steps of: detecting a frame transmitted from a second access point (AP) sharing a transmission opportunity (TXOP) with a first AP connected to the STA; identifying a duration field of the frame; on the basis of the duration field of the frame being configured to have a value smaller than a value corresponding to the entire TXOP period, omitting setting of a network allocation vector (NAV) during at least a portion of the entire TXOP period; and performing frame exchange with the first AP within at least a portion of the entire TXOP period in which the setting of the NAV is omitted.

Abstract: A method and a device for performing TID-to-link mapping in a wireless LAN system are disclosed. A method of performing link management by an STA MLD in a wireless LAN system may comprise the steps of: receiving a first frame including first information related to link mapping of a plurality of TIDS from an AP MLD; and transmitting, to the AP MLD, a second frame including second information indicating whether to request updating of link mapping of at least one TID among the plurality of TIDs and third information related to updating of link mapping of the at least one TID.

Abstract: The present disclosure relates to identification related to roaming in a wireless LAN system. According to an embodiment of the present disclosure, a method performed by a mobile device in a wireless LAN system comprises the steps of performing a connection procedure with a first access point (AP) affiliated with a first multi-link device (MLD); acquiring a group identifier (ID) of a roaming group including the first MLD; transmitting, to a second MLD included in the roaming group, a request frame for requesting roaming, the request frame including the group ID; and on the basis of receiving a response frame including the group ID, performing roaming by means of the second MLD.

Abstract: Proposed are a method and an apparatus for transferring information requested by a non-AP STA for P2P transmission to an AP in a wireless LAN system. Specifically, a first receiving STA receives a QoS data frame or a QoS null frame from a transmitting STA. The first receiving STA receives a MU-RTS TXS frame from the transmitting STA. The first receiving STA transmits data to a second receiving STA on the basis of the MU-RTS TXS frame. The QoS data frame or the QoS null frame includes a TXS control frame. The TXS control frame includes first information on a time required for transmission of the data and second information on a bandwidth required for the transmission of the data. The MU-RTS TXS frame includes third information on a time allocated for transmitting the data and fourth information on a bandwidth allocated for transmitting the data.

Abstract: A method and a device for transmitting/receiving information about a restricted target wake time in a wireless LAN system are disclosed. The method performed by an STA in a wireless LAN system, according to one embodiment of the present disclosure, may comprise the steps of: receiving, from a first AP, a frame including information about an R-TWT; and transmitting or receiving a PPDU to or from a second AP on the basis of the information about the R-TWT.

Abstract: A method and a device for receiving a multi-RA A-MPDU in a wireless LAN system are proposed. Specifically, a first and a second receiving STA receive a PPDU from a transmitting STA. The first and the second receiving STA decode the PPDU. The PPDU includes a signal field and a first A-MPDU. The signal field includes a first RU allocation subfield. The first RU allocation subfield includes information on the number of RAs configured in the first A-MPDU and the size of an RU or an MRU to which the first A-MPDU is allocated. The RAs configured in the first A-MPDU include a first RA for the first receiving STA and a second RA for the second receiving STA.

Abstract: Disclosed are a method and device for sharing TXOP in a wireless LAN system. A method performed by a first AP according to one embodiment of the present disclosure may comprise the steps of: receiving a first trigger frame from a second AP, wherein the first trigger frame includes information about time allocated to the first AP within TXOP obtained by the second AP; and performing transmission or reception of STA and PPDU within the allocated time.

Abstract: A method and a device for performing communication in a wireless LAN system are disclosed. A method by which a first station (STA) performs communication in a wireless LAN system may comprise the steps of: receiving, from an access point (AP), first information related to a restricted target wake time (r-TWT); receiving, from the AP, second information related to the extension of the end time of a service period (SP) of the r-TWT; and transmitting, to the AP, third information indicating whether to maintain an awake state until the end time of the extended SP.

Abstract: A method and a device for transmission or reception in an enhanced triggered transmission opportunity sharing procedure in a wireless LAN system are disclosed. The method performed by an STA in a wireless LAN system, according to one embodiment of the present disclosure, may comprise the steps of: receiving, from an AP, a trigger frame related to sharing of a TXOP; transmitting, to the AP, a response frame for the trigger frame; and, on the basis of the trigger frame, performing frame exchange with another STA in a time interval allocated to the STA.

Abstract: Disclosed are a method and device for indicating a link for a specific type of traffic in a wireless LAN system. A method by which a first station (STA) carries out in a wireless LAN system, according to an embodiment of the present disclosure, may comprise the steps of: transmitting a stream classification service (SCS) request frame to a second STA, the SCS request frame comprising information related to negotiation of a specific type of traffic; and receiving a SCS response frame from the second STA in response to the SCS request frame. Here, at least one of the SCS request frame or the SCS response frame may comprise link-related information indicating at least one link through which the specific type of traffic is to be transmitted and received.

Abstract: A method and apparatus for classifying low latency (LL) traffic in a wireless LAN system are disclosed. The method performed by a first STA in a wireless LAN system, according to an embodiment of the present disclosure, may comprise the steps of: transmitting, to a second STA, a request frame for a stream classification service (SCS) step; and receiving, from the second STA, a response frame to the request frame. Here, at least one of the request frame and the response frame may comprise first information indicating an SCS ID and second information indicating an LL-related ID for classification of LL traffic.

Abstract: Proposed are a method and apparatus for performing an OBSS sounding procedure in a wireless LAN system. Specifically, a receiving STA receives a first trigger frame from a first transmitting STA. The receiving STA receives an NDPA frame from a second transmitting STA. The receiving STA receives an NDP frame from the second transmitting STA. On the basis of the NDPA frame and NDP frame, the receiving STA transmits a feedback frame to the first or second transmitting STA. The first trigger frame contains information about an OAID. The OAID is information for the second transmitting STA to identify the receiving STA. The NDPA frame, NDP frame, and feedback frame are transmitted and received on the basis of the OAID.

Abstract: A method and apparatus for classifying low latency (LL) traffic in a wireless LAN system are disclosed. The method performed by a first station (STA) in a wireless LAN system may comprise the steps of: transmitting, to a second STA, a request frame for negotiating mapping between a traffic ID (TID) and a link; and receiving, from the second STA, a response frame to the request frame. Here, at least one of the request frame and the response frame may include first information related to TID-specific link mapping and second information related to mapping between an LL-related ID for classification of LL traffic and a link.

Abstract: A method for a station (STA) to transmit a buffer state report (BSR) in a wireless LAN system according to an embodiment of the present invention includes the steps of: transmitting, to an access point (AP), a frame including a first BSR control subfield including first queue size information about first-type traffic and second-type traffic; and transmitting, to the AP, a frame including a second BSR control subfield including second queue size information about the second-type traffic, wherein the second-type traffic may correspond to latency-sensitive traffic, and the first-type traffic may correspond to traffic other than the second-type traffic.

Abstract: Disclosed are a method and apparatus for classifying low-latency traffic in a wireless LAN system. The method performed by a first STA in a wireless LAN system, according to one embodiment of the present disclosure, may comprise the steps of: transmitting, to a second STA, a request frame for a stream classification service (SCS) process; and receiving, from the second STA, a response frame for the request frame. At least one of the request frame and the response frame comprises first information indicating an SCS ID and second information indicating a low latency (LL)-related ID for classifying LL traffic, wherein the LL-related ID may be commonly applied to one or more STAs associated with the second STA.

Abstract: A method and a device for classifying low latency traffic in a wireless LAN system are disclosed. A method performed by a first station (STA) in a wireless LAN system may comprise the steps of: receiving, from a second STA, a restricted target wake time (R-TWT)-related frame including information on a low latency (LL)-related ID for classifying LL traffic; and performing, with the second STA, frame exchange based on traffic of the LL-related ID in a R-TWT service period (SP) based on the R-TWT-related frame. Here, the information on the LL-related ID may be indicated on the basis of a particular field of a TWT element in the R-TWT-related frame or a particular element in the R-TWT-related frame.

Abstract: A method and a device for sharing a security key on the basis of a multi-access point (AP) operation in a wireless LAN system are disclosed. The method performed by means of a first station (STA) in a wireless LAN system, according to one embodiment of the present disclosure, may comprise steps in which: the first STA generates a multi-access point group temporal key (MAGTK); and the MAGTK encrypted on the basis of a key shared between the first STA and one or more second STAs is transmitted to the one or more second STAs. The security key for a third STA is encrypted on the basis of the MAGTK, and can be shared with the first STA and the one or more second STAs.

Abstract: A transmission/reception method and device based on flexible user priority-to-access category mapping in a wireless LAN system are disclosed. A method performed by means of a first station (STA) in a wireless LAN system, according to one embodiment of the present disclosure, may comprise the steps of: transmitting, to a second STA, a stream classification service (SCS) request frame including information related to user priority (UP)-to-access category (AC) (UP-to-AC) mapping; receiving, from the second STA, an SCS response frame as a response to the SCS request frame; and exchanging frames with the second STA on the basis of the information related to the UP-to-AC mapping.