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: A transmitting multi-link device (MLD) in a wireless local area network system enables a first station (STA) to perform a back-off operation again without transmitting PPDU, if a second STA is in the middle of receiving even when a back-off counter (BC) of the first STA becomes 0. The first STA and the second STA are included in the same transmitting MLD. The first STA operates on a first link and the second STA operates on a second link. The first and second links are included in a non-simultaneous transmit and receive (NSTR) link pair.

Abstract: In a wireless local area network (WLAN) system, a transmitting multi-link device (MLD) may defer the transmission of a PPDU on a first link, even if a back-off counter of a non-primary link reaches zero, as long as a back-off counter of a primary link does not reach zero. When the transmission of the PPDU is deferred, the back-off counter may be kept at zero.

Abstract: A method and a device for performing sensing measurement in a wireless LAN system are disclosed. The method according to one embodiment of the present disclosure may comprise the steps of: receiving a sensing NDPA frame from an AP; and receiving an NDP from the AP. The sensing NDPA frame includes a sounding dialogue token field and a special STA information field including common information related to sensing measurement for a plurality of STAs, the special STA information field is positioned after the sounding dialogue token field and, in order to identify the sensing NDPA frame, the value of an NDP announcement transformation subfield of the sounding dialogue token field can be set to 10 and the AID value of the special STA information field can be set to a predetermined value.

Abstract: One embodiment according to the present specification relates to a technique for transmitting information related to a packet extension field in a wireless LAN (WLAN) system. An NGV PPDU can include at least one midamble and a packet extension field set on the basis of the at least one midamble. For example, a duration related to the packet extension field can be set on the basis of the number of the at least one midamble. A preamble of the NGV PPDU can include information related to a packet extension field.

Abstract: Disclosed are a method and an apparatus for performing sensing measurement in a wireless LAN system. A method, according to one embodiment of the present disclosure, may comprise the steps of: receiving a sensing NDPA frame from an AP; and receiving an NDP from the AP. The sensing NDPA frame may include a frame control field and a first field including common information related to sensing measurement for a plurality of STAs, the frame control field may include a subtype subfield, in order to identify the sensing NDPA frame, a value of the subtype subfield may be set to 0110, and a control frame extension value in the subtype subfield may be set to a predetermined value.

Abstract: Provided is a refrigerator including a cabinet forming one of a refrigerator compartment and a freezer compartment, a main door opening and closing the refrigerator compartment or the freezer compartment and including a storage space opened forward, a sub door installed on the main door and opening and closing the storage space of the main door, and a dispenser disposed on the sub door and dispensing water.

Abstract: In a Wireless Local Area Network system, an STA may receive a trigger frame from an AP. The trigger frame may include a common information field and user information fields. Each of the user information fields may include a first field related to an association identifier (AID) and a second field including information for the STA related to the AID. The second field may include special information for every STA receiving the trigger frame on the basis that the first field has a specific value. The common information field may include a present field related to whether a user information field in which the first field has the specific value is present among the user information fields.

Abstract: According to various embodiments, a multi-link device (MLD) operating in a plurality of links including a first link can transmit a request frame to a first AP of an AP MILD through a first STA (station), wherein the request frame includes an information field for requesting every element included in an element set designated for a second link. The MILD can, on the basis of the request frame, receive every element included in the element set designated for the second link.

Abstract: Presented are a method by which a transmitting device performs channel switching between multi-links in a wireless local area network (LAN) system, and a device. Particularly, the method comprises the steps of: transmitting multi-link channel switching capability information to a receiving device, wherein the multi-link channel switching capability information includes information related to whether the transmitting device can perform channel changing between multi-link channels; transmitting a physical protocol data unit (PPDU) to the receiving device through a first link; transmitting a multi-link channel change signal to the receiving device through the first link; and transmitting the PPDU to the receiving device through a second link.

Abstract: Disclosed are a method and an apparatus for transmitting and receiving protocol data unit (PDU)-related information in a wireless LAN system. The method by which a first station (STA) transmits an aggregate-medium access control (MAC) protocol data unit (PDU) (A-MPDU) in a wireless LAN system, according to an embodiment of the present disclosure, may comprise the steps of: receiving, from a second STA, one or more of first information, second information, and third information related to the maximum length for the A-MPDU; and transmitting, to the second STA, an A-MPDU having a length less than or equal to the maximum length for the A-MPDU, which is derived from a first type physical layer PDU (PPDU) on the basis of the first information, the second information, and the third information.

Abstract: The present specification defines a link adaptation control subfield applicable to a next-generation wireless LAN system including an EHT specification. According to an embodiment described in the present specification, the link adaptation control subfield may include a PS160 subfield. According to another embodiment described in the present specification, the link adaptation control subfield may include a 1-bit MRQ/uplink TB PPDU MFB subfield.

Abstract: A method and a device for sensing-related polling in a wireless LAN system. A method by which a first station (STA) responds to sensing-related polling in a wireless LAN system, according to one embodiment of the present disclosure, comprises the steps of: receiving, from a second STA, a polling frame including information related to first type sounding and/or second type sounding; and transmitting, to the second STA, a response frame for the polling frame, wherein the response frame can be triggered by means of the polling frame with respect to one or more STAs including the first STA.

Abstract: The present disclosure relates to a method performed by a non-access point (AP) station (STA) multi-link device (MLD) of a wireless LAN system, the method comprising the steps of: transmitting, through a first link, a negotiation frame including first maximum number of spatial stream (NSS) information to an AP MLD; and receiving a negotiation response frame from the AP MLD through the first link.

Abstract: In a wireless local area network system. a reception multi-link device (MLD) may not transmit a CTS frame, even if the reception multi-link device receives an RTS frame via a second link, in the case that an STA operating via a first link is a TXOP responder.

Abstract: According to various embodiments, a multi-link device (MLD) operating in multiple links including a first link may transmit, through a first station (STA) and to a first AP of an AP multi-link device, a request frame including an information field for requesting at least one element related to a second link. The multi-link device may receive at least one element related to the second link on the basis of the request frame.

Abstract: Provided are an etching composition, a method of etching a metal-containing film using the same, and a method of manufacturing a semiconductor device by using the same. The etching composition includes an oxidizing agent, an acid, and a selective etching inhibitor, wherein the oxidizing agent is metal-free, the selective etching inhibitor includes a copolymer including a first repeating unit and a second repeating unit, the first repeating unit is different from the second repeating unit, and the first repeating unit is a nitrogen-containing repeating unit.

Abstract: According to various embodiments, a multi-link device (MLD) operating in a plurality of links can receive a PPDU through a first link from among the plurality of links. The PPU can include a first information field related to a second link that is differentiated from the first link. The first information field related to a second link can include a second information field related to a link identifier of a second link and a third information field related to whether all pieces of element information related to a second link is included in the PPDU.

Abstract: Proposed are a method and a device for requesting the same partial information for all transmission STAs within a transmission MLD and responding thereto in a wireless LAN system. Specifically, a reception MLD transmits an ML probe request frame through a first link from the transmission MLD. The reception MLD receives an ML probe response frame through the first link from the transmission MLD. The ML probe request frame includes a first frame body and a probe request ML element. When the first reception ST A requests the same partial information for all transmission STAs, the first frame body includes a first request element and the probe request ML element does not include a profile sub-element of the second transmission STA.

Abstract: Proposed according to an embodiment of the present disclosure is a method in which a subtype subfield included in a frame control field is used to identify an enhanced NDPA frame, that is, an NDPA frame supporting next-generation wireless LAN standards. Proposed according to another embodiment of the present disclosure is a method in which a type subfield included in a frame control field is used to identify an enhanced NDPA frame, that is, an NDPA frame supporting next-generation wireless LAN standards.