Abstract: Disclosed is a method for transmitting or receiving a physical layer protocol data unit (PPDU) in a wireless communication system. A terminal receives, from an access point (AP), a frame indicating, to one or more terminals, transmission of the PPDU. The frame comprises a common information field and a user information field for each of the one or more terminals, and at least one of the common information field and the user information field is used to identify whether the PPDU indicated by a trigger frame corresponds to an extremely high throughput (EHT) PPDU or a high efficiency (HE) PPDU. In response to the frame, the terminal transmits the PPDU.

Abstract: The present invention relates to a wireless communication method and a wireless communication terminal for signaling a multi-user packet. More specifically, provided are a wireless communication terminal including a communication unit; and a processor configured to process signals transmitted and received through the communication unit, wherein the processor receives, through the communication unit, a high efficiency multi-user PHY protocol data unit (HE MU PPDU), wherein a preamble of the HE MU PPDU includes high efficiency signal A field (HE-SIG-A) and high efficiency signal B field (HE-SIG-B), and decodes the received HE MU PPDU based on information obtained from the HE-SIG-A, wherein a configuration of the HE-SIG-B is identified based on information obtained from at least one subfield of the HE-SIG-A and a wireless communication method using the same.

Abstract: A multi-link device using a plurality of links is disclosed. A processor receives, in any one link of the plurality of links, a first physical layer protocol data unit (PPDU) including access category (AC) constraint signaling and a reverse direction (RD) grant from a station which is a transmission opportunity (TXOP) holder or a service period (SP) source, and transmits, in the any one link, a second PPDU to the station in response to the first PPDU on the basis of the AC constraint signaling. The AC constraint signaling indicates whether a traffic identifier (TID) or AC of a frame included in the second PPDU is constrained.

Abstract: The present invention relates to a signaling method of a wireless LAN frame for multi-user transmission, and to a wireless communication terminal, and a wireless communication method using the same. To this end, provided are a wireless communication terminal, including: a transceiver; and a processor, wherein the processor is configured to: generate a frame including a first signal field and a second signal field, wherein the first signal field includes a bandwidth field indicating total bandwidth information in which the frame is transmitted, and the second signal field includes a resource allocation field indicating arrangement information of resource unit(s) in a frequency band through which the frame is transmitted, and transmit, by the transceiver, the generated frame and a wireless communication method using the same.

Abstract: A video signal decoding device comprising a processor, wherein the processor is configured to: obtain reference samples corresponding to a first side of a current block and reference samples corresponding to a second side of the current block, obtain a direct current (DC) value for prediction of the current block based on a reference sample set comprising at least some of the reference samples corresponding to the first side and the reference samples corresponding to the second side, and reconstruct the current block based on the DC value.

Abstract: Disclosed is a station communicating with a single radio multi-link device, which includes a plurality of stations operating on a plurality of links but does not support simultaneous transmission and reception by the plurality of stations. The station comprises a transmitting/receiving unit and a processor. The processor transmits a control frame to a first station of the single radio multi-link device by using the transmitting/receiving unit, receives a response to the control frame from the first station of the single radio multi-link device, and starts a null data packet (NDP) sounding sequence for the first station of the single radio multi-link device.

Abstract: Disclosed is a method for transmitting and receiving data in a non-access point (AP) multi-link device (MILD) of a wireless communication system. The non-AP MLD may perform a back off procedure for performing simultaneous transmission through a multi-link of the non-AP MLD, and simultaneously perform uplink transmission to an AP MLD through each of a first link and a second link included in the multi-link. Here, when both a first back-off counter and a second back-off counter have a value of “0”, if the transmission time of the uplink transmission in the first link is a slot boundary of a first slot that is a slot next to a slot in which the first back-off counter is “0”, the uplink transmission in the second link may be performed within a predetermined time from the transmission time of the first link.

Abstract: Provided is a wireless communication terminal that wirelessly communicates with a base wireless communication terminal. The wireless communication terminal includes a transceiver, and a processor. The processor is configured to set an integer selected from a range of 0 to a value equal to or smaller than an OFDMA Contention Window (OCW) as a counter for random access, receive a trigger frame for triggering random access using one or more resource units (RUs) allocated for the random access from the base wireless communication terminal using the transceiver, decrement a value of the counter based on the one or more RUs allocated for the random access, randomly select one RU based on the one or more RUs allocated for the random access when the value of the counter is 0 or reaches 0, and attempt transmission to the base wireless communication terminal using the selected RU.

Abstract: The present invention relates to a method for transmitting an aggregate MPDU and a response frame thereto and a wireless communication terminal using the same, and more particularly, to a wireless communication method and a wireless communication terminal for setting various formats of the aggregate MPDU and the response frame thereto and performing an efficient data communication by using the same.

Abstract: The present invention relates to a method for constructing an aggregated frame for efficient wireless communication in a high-density environment and a wireless communication method using the same. For this, the present invention provides a wireless communication method including: generating an aggregated MPDU (A-MPDU) including a plurality of MAC protocol data unit (MPDU) groups to which independent modulation and coding schemes (MCSs) are applied, respectively; and transmitting the generated A-MPDU through the transceiver and a wireless communication terminal using the same.

Abstract: Provided is a wireless communication terminal that communicates wirelessly. The terminal includes: a transceiver; and a processor. The processor is configured to receive a frame through the transceiver, determine whether the frame is classified into an Intra-Basic Service Set (BSS) frame or an Inter-BSS frame according to a BSS from which the frame is transmitted, and access a channel according to whether the frame is an Intra-BSS frame or an Inter-BSS frame.

Abstract: Disclosed is a method by which a multi-link device (MLD) transmits a frame in a wireless communication system. A non-AP MLD can transmit, to an AP MLD, a probe request frame for association, and receive a beacon frame for the association from the AP MLD. Here, a plurality of links are configured for the AP MLD, and the plurality of links are composed of one basic link and at least one extended link and the beacon frame can be transmitted/received through the basic link.

Abstract: A wireless communication terminal is disclosed. The wireless communication terminal includes a transceiver configured to transmit/receive a wireless signal; and a processor configured to control an operation of the wireless communication terminal. The transceiver transmits a training signal to a base wireless communication terminal based on a sub-frequency band allocated from the base wireless communication terminal, and transmits data to the base wireless communication terminal through the sub-frequency band allocated from the base wireless communication terminal. The training signal is used, by the base wireless communication terminal, for receiving the data from the wireless communication terminal.

Abstract: Provided is a wireless communication terminal that communicates wirelessly. The terminal includes: a transceiver; and a processor. The processor is configured to transmit first information on a fragmentation level to be used for data to be transmitted to a recipient by using the transceiver in an add Block ACK (ADDBA) setup procedure.

Abstract: Disclosed is a method for transmitting and receiving a PPDU in a wireless communication system. A terminal receives, from an access point (AP), a frame indicating transmission of a PPDU to one or more terminals and transmits the PPDU on the basis of an AID12 subfield included in the frame. In this case, if the PPDU indicated to be transmitted by the frame is an extremely high throughput (EHT) PPDU, a value of the AID12 subfield is configured to one of multiple values excluding at least one specific value, and the at least one specific value is used to allocate a resource for an uplink orthogonal frequency division multiple access (OFDMA)-based random access (UORA) of at least one terminal supporting high efficiency (HE).

Abstract: Provided is a wireless communication terminal that communicates wirelessly. The wireless communication terminal includes: a transceiver; and a processor. The processor receives a first PLCP Protocol Data Unit (PPPU) through the transceiver, and transmits a second PPDU based on Basic Service Set (BSS) information indicated by the first PPDU.

Abstract: The present invention relates to a wireless communication method and a wireless communication terminal for a spatial reuse operation of an overlapping basic service set, and more particularly, to a wireless communication method and a wireless communication terminal for supporting a spatial reuse operation of an overlapping basic service set to efficiently use a wireless resource. To this end, provided are a wireless communication terminal including: a processor; and a communication unit, wherein the processor receives a trigger frame indicating an uplink multi-user transmission, and transmits a trigger-based PHY protocol data unit (PPDU) in response to the received trigger frame, wherein the trigger-based PPDU comprises a spatial reuse parameter for spatial reuse operation of an overlapping basic service set (OBSS) terminal and a wireless communication method using the same.

Abstract: Disclosed are a video signal processing method and apparatus for encoding or decoding a video signal. In more detail, the video signal processing method includes receiving intra prediction mode information for a current block, wherein the intra prediction mode information indicates one of a plurality of intra prediction modes configuring an intra prediction mode set; and decoding the current block based on the received intra prediction mode information, wherein the intra prediction mode set comprises a plurality of angle modes, and the plurality of angle modes comprises a basic angle mode and an extended angle mode, wherein the extended angle mode is signaled based on the basic angle mode.

Abstract: Provided is a wireless communication terminal that wirelessly communicates with a base wireless communication terminal. The wireless communication terminal includes: a transceiver; and a processor. The processor is configured to receive trigger information and data from the base wireless communication terminal by using the transceiver, and transmits ACK information indicating whether the data is received to the base wireless communication terminal based on the trigger information. The trigger information is information for triggering transmission of the wireless communication terminal.

Abstract: A video signal decoding apparatus, comprising a processor, wherein the processor is configured to: parse a syntax element related to a secondary transform of a coding unit based on whether a prediction method of the coding unit is MIP (Matrix based Intra Prediction), check whether or not the secondary transform is applied to a transform block included in the coding unit based on the parsed syntax element, obtain one or more inverse transform coefficients based on an inverse transform of the secondary transform when the secondary transform is applied to the transform block, obtain a residual sample for the transform block based on the one or more inverse transform coefficients.