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 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.

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: Disclosed are a method and a device for transmission or reception based on flexible user priority (UP)-to-access category (AC) mapping in a wireless LAN system. A method performed by a station (STA) in a wireless LAN system according to an embodiment of the present disclosure may comprise the steps of: transmitting, to an access point (AP), a request including information associated with first user priority-to-access category (UP-to-AC) mapping; receiving, from the AP, a response including one or more of information associated with second UP-to-AC mapping and whether the information associated with the first UP-to-AC mapping is accepted; and performing frame exchange with the AP on the basis of the information associated with the first UP-to-AC mapping or the information associated with the second UP-to-AC mapping.

Abstract: The present specification proposes an improved recommendation for TWT operation supported in a next-generation wireless LAN system. According to one embodiment of the present specification, an improved recommendation for constrained TWT operation is defined. According to another embodiment of the present specification, whether an STA performs an NAV protection mechanism can be determined according to the value of a broadcast TWT proposal subfield.

Abstract: A method and a device for performing relay transmission during a triggered transmission opportunity 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, comprises the steps of: receiving, from an access point (AP), a first A-MPDU including data to be transmitted to a second STA; transmitting, to the AP, an ACK frame for the first A-MPDU; and transmitting, to the second STA, a second A-MPDU including the data. Here, the ACK frame includes ACK information indicating whether to identify at least one MAC header included in the first A-MPDU, and the ACK information can be based on an ACK policy indicated by an ACK-policy-related field included in the first A-MPDU and at least one other field.

Abstract: Disclosed are a method and apparatus for transmitting or receiving security key-related information on the basis of the operation of multiple access points (APs) in a wireless LAN system. The method performed by a first station (STA) in a wireless LAN system, according to one embodiment of the present disclosure, may include the steps of: generating a security key for a second STA on the basis of linkage with the second STA; and transmitting, to a third STA, a first message including information related to the security key for the second STA. The first message may include a security parameter element (SPE) including at least one of a basic service set identifier (BSSID) of the first STA or an address of the second STA.

Abstract: Presented are a method and a device for requesting and receiving information about other AP corresponding to a nontransmitted BSSID set in a wireless LAN system. Particularly, a reception MLD transmits a multi-link (ML) probe request frame from a transmission MLD through a first link. The reception MLD receives an ML probe response frame from the transmission MLD through the first link. The transmission MLD includes first and second transmission MLDs. The first transmission MLD includes a first transmission STA operating in the first link. The second transmission MLD includes a second transmission STA operating in the first link, and a third transmission STA operating in a second link. The second transmission STA is a transmission STA corresponding to a first nontransmitted BSSID of a set of multiple BSSIDs on the basis of the first transmission STA.

Abstract: A method and a device for listen-interval-based transmission or reception for a multi-link device (MLD) in a wireless LAN system are disclosed. The method performed by a station (STA) in a wireless LAN system, according to one embodiment of the present disclosure, may comprise the steps of: detecting, by the STA belonging to a non-access point (non-AP) MLD, a change in the state of one or more links from among a plurality of links; determining an updated MLD listen interval on the basis of one or more enabled links; and performing transmission or reception with an AP MLD on the basis of the updated MLD listen interval.

Abstract: Disclosed are an operating method and a device in a wireless LAN system. A method performed by a first STA in a wireless LAN system according to an embodiment of the disclosure may include the steps of: receiving a first aggregated medium access control protocol data unit (A-MPDU) including at least one address field and a quality of service (QOS) data frame from an access point (AP); transmitting a second A-MPDU including the QOS data frame to a second STA; and transmitting first block ACK (BA) frame including BA information received from the second STA to the AP, wherein the at least one address field includes an address 3 field configured as an MAC address of the second STA and an address 4 field configured as an MAC address of the AP.

Abstract: Proposed are a method and device for transmitting an ML element for ML reconfiguration in a wireless LAN system. Particularly, a reception MLD generates a first ML element for ML reconfiguration. The reception MLD transmits the first ML element to a transmission MLD via a first link. The first ML element comprises a profile subelement of a second reception STA. The profile subelement of the second reception STA comprises a first STA control field. The first STA control field comprises an STA MAC address present subfield. If the value of the STA MAC address present subfield is 1, then the profile subelement of the second reception STA further comprises an STA MAC address subfield.

Abstract: Disclosed are a method and apparatus for scheduling on the basis of multiple access point (AP) operations in a wireless LAN system. A method, performed by a first type station (STA) in a wireless LAN system according to one embodiment of the present disclosure, may comprise the following steps of: receiving, from a second type STA, information relating to one or more service periods (SPs) for the first type STA among a plurality of first type STAs; and performing, on the basis of the information relating to one or more SPs, a frame exchange with one or more third type STAs associated with the first type STA. The one or more SPs may comprise SPs that are restricted from transmitting STAs other than the first type STA and the one or more third type STAs.

Abstract: A method and a device for operating in a wireless LAN system are disclosed. The method performed by a first STA in a wireless LAN system according to one embodiment of the present disclosure comprises the operations of: transmitting, to an access point (AP), a first frame including a first field for requesting peer-to-peer (P2P) data communication within a restricted-target wake time (r-TWT); receiving, from the AP, a second frame including first information related to a time for P2P data communication; and performing the P2P data communication with a second STA for a time allocated by means of the first information, wherein the time allocated by means of the first information may be within an r-TWT service period (SP).

Abstract: Proposed are a method and apparatus for transmitting an ML element for ML reconfiguration in a wireless LAN system. In particular, a reception MLD generates a first ML element for ML reconfiguration. The reception MLD transmits the first ML element to a transmission MLD through a first link. The first ML element includes a profile sub-element of a second reception STA. The profile sub-element of the second reception STA includes a first STA control field. The first STA control field includes an entire profile sub-field. When a value of the entire profile sub-field is 1, the profile sub-element of the second reception STA includes entire information for the ML reconfiguration. When the value of entire profile sub-field is 0, the profile sub-element of the second reception STA does not include any information for the ML reconfiguration.

Abstract: Proposed are a method and apparatus for transmitting BSR information for another link on the basis of an A-control field in a wireless LAN system. In particular, a reception MLD generates an A-control field, and transmits the A-control field to a transmission MLD via a first link. The transmission MLD includes: a first transmission STA operating in the first link; a second transmission STA operating in a second link; and a third transmission STA operating in a third link. The reception MLD includes: a first reception STA operating in the first link; a second reception STA operating in the second link; and a third reception STA operating in the third link. The A-control field includes a control identifier, and control information for a BSR.