Abstract: A video signal processing method comprises: determining a prediction mode of a current block; when the prediction mode of the current block is an Intra Block Copy (IBC) prediction mode, decoding the current block, based on the IBC prediction mode and a reference block included in a first reference block set; and when the prediction mode of the current block is an inter prediction mode, decoding the current block, based on the inter prediction mode and a reference block included in a second reference block set.

Abstract: Provided is a wireless communication terminal that wirelessly communicates. The wireless communication terminal includes a transceiver configured to transmit and receive wireless signals; and a processor configured to process the wireless signals. The processor is configured to: generate a trigger frame for triggering uplink transmission based random access of at least one wireless communication terminal, and insert the trigger frame into a physical layer protocol data unit (PPDU) to transmit the PPDU.

Abstract: Provided is a base wireless communication terminal. The base wireless communication terminal includes a transceiver and a processor. The processor is configured to transmit a mixed Physical Layer Protocol Data Unit (PPDU) including both data for a Long Range (LR) wireless communication terminal and data for a non-LR wireless communication terminal to the LR wireless communication terminal and the non-LR wireless communication terminal using the transceiver. The LR PPDU including only the data for the LR wireless communication terminal has a narrower bandwidth than a bandwidth of the non-LR PPDU including only the data for the non-LR wireless communication terminal.

Abstract: In order to efficiently schedule data transmission of a plurality of terminals, the wireless communication terminal receives a trigger frame indicating uplink multi-user transmission, and transmits an uplink multi-user PPD U (PLCP Protocol Data Unit) in response to the received trigger frame. In this case, the trigger frame and the non-legacy preamble of the uplink multi-user PPDU include remaining TXOP (Transmission Opportunity) time information of the uplink multi-user transmission process.

Abstract: In order to efficiently schedule data transmission of a plurality of terminals, the wireless communication terminal receives a trigger frame indicating uplink multi-user transmission, and transmits an uplink multi-user PPD U (PLCP Protocol Data Unit) in response to the received trigger frame. In this case, the trigger frame and the non-legacy preamble of the uplink multi-user PPDU include remaining TXOP (Transmission Opportunity) time information of the uplink multi-user transmission process.

Abstract: The present invention provides a method, device, and system for adjusting a contention window size for performing channel access. The method includes: receiving uplink scheduling information on the uplink transmission including a new data indicator (NDI) associated with a specific subframe in a first uplink transmission burst; determining a contention window size based on the NDI; generating a random number N (N?0) in the determined contention window size based on the NDI associated with the specific subframe; and performing the uplink transmission on the specific cell after sensing a channel on the specific cell at least for N slots while the channel on the specific cell is idle. If the NDI is toggled, the contention window size is reset to a minimum value, and if the NDI is not toggled, the contention window size is increased to a next higher allowed value.

Abstract: Disclosed are: a method by which a first multi-link device (MLD) comprising a plurality of stations operating in a plurality of links, respectively, transmits and receives a frame in a wireless communication system; and a device. Particularly, the first MLD according to the present invention can transmit a request frame to a second station from among a plurality of second stations included in a second MLD operating in at least one link, respectively, through a first station from among the plurality of first stations included in the first multi-link device, and receive a response frame as a response to the request frame from the second station through the first station. At this time, the request frame can comprise information about other stations included in the first MLD, and the response frame can comprise information about other stations included in the second MLD.

Abstract: A method by which a terminal transmits an uplink channel in a wireless communication system comprises steps of: receiving, from a base station, first information, which is information related to a time division duplex (TDD) configuration; and repeatedly transmitting, to the base station, an uplink channel on a resource determined on the basis of the first information.

Abstract: Provided is a wireless communication terminal. 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 receives a trigger frame including information on a channel to be used, by a plurality of wireless communication terminals including the wireless communication terminal, in communication with a base wireless communication terminal that is any one wireless communication terminal different from the plurality of wireless communication terminals.

Abstract: Disclosed is a method by which a terminal transmits a physical uplink shared channel (PUSCH) to a base station in a wireless communication system. The terminal can receive, from the base station, configuration information for allocating a resource for transmitting a transport block (TB) through the PUSCH, and map the TB to a plurality of slots constituting the resource on the basis of the configuration information. Thereafter, the terminal can transmit the TB on the plurality of slots through the PUSCH.

Abstract: Disclosed are a video signal processing method and device whereby a video signal is encoded or decoded. The video signal processing method may comprise the steps of: determining whether an intra sub-partition (ISP) mode is applicable to a current block; if the ISP mode is applicable to the current block, splitting the current block into a plurality of rectangular transform blocks in the horizontal or vertical direction; generating prediction blocks of the transform blocks by carrying out intra prediction on each of the transform blocks; and reconstructing the current block on the basis of residual blocks of the transform blocks, and the prediction blocks.

Abstract: Provided is a wireless communication terminal that communicates wirelessly. The terminal includes: a transceiver; and a processor. The terminal includes a transceiver, and a processor. The processor is configured to receive an Aggregate-MAC Protocol Data Unit (A-MPDU) from an originator using the transceiver, and when receiving all MPDUs included in the A-MPDU, transmit to the originator a block ACK (BA) frame signaling that all MPDUs included in the A-MPDU are received without a bitmap indicating whether each MPDU included in the A-MPDU is received.

Abstract: Provided is a wireless communication terminal that communicates wirelessly. The terminal includes: a transceiver; and a processor. The terminal includes a transceiver, and a processor. The processor is configured to receive an Aggregate-MAC Protocol Data Unit (A-MPDU) from an originator using the transceiver, and when receiving all MPDUs included in the A-MPDU, transmit to the originator a block ACK (BA) frame signaling that all MPDUs included in the A-MPDU are received without a bitmap indicating whether each MPDU included in the A-MPDU is received.

Abstract: Disclosed is a video signal processing method comprising the steps of: acquiring a merge index which indicates a candidate for prediction of a current block among a plurality of candidates for the prediction of the current block, which are included in a merge candidate list; acquiring motion information of the current block on the basis of motion information corresponding to the candidate indicated by the merge index; when the motion information of the current block includes a plurality of motion vectors corresponding to a list of different reference pictures, comparing picture order count (POC) differences between each of the reference pictures corresponding to the plurality of motion vectors and the current picture including the current block; correcting the plurality of motion vectors on the basis of a result of the comparison; and reconstructing the current block on the basis of the plurality of corrected motion vectors.

Abstract: Provided is a method for performing transmission of an uplink channel in a wireless communication system, the method being performed by a terminal and comprising the steps of: receiving a system information block 1 (SIB1) from a base station; transmitting a preamble for a random access procedure to the base station; receiving a random access response (RAR) to the preamble from the base station; and transmitting a PUSCH to the base station on the basis of the random access response.

Abstract: A user equipment of a wireless communication system is disclosed. The user equipment includes a communication module, and a processor. The processor is configured to transmit a radio frame divided into a plurality of subframes through the communication module, and perform a UL transmission in a partial subframe having a duration shorter than one subframe duration to the base station based on at least one of an indication of a base station and a result of a channel access of the wireless communication system.

Abstract: A video signal processing device includes a processor. The processor is configured to obtain a secondary transform kernel for a current block based on an intra prediction mode of the current block to which a secondary transform is applied, to obtain a secondary inverse transformed block by performing a secondary inverse transform on a top-left specific region of the current block using the secondary transform kernel, wherein the secondary inverse transform is an inverse transform of the secondary transform, and the secondary transform is a low frequency non-separable transform, to obtain a residual block of the current block by performing a primary inverse transform on the secondary inverse transformed block, wherein one or more coefficients of the top-left specific region of the current block are derived in a preset scan order and the preset scan order is a 4×4 up-right diagonal scan order regardless of a size of the current block.

Abstract: A method for performing an uplink transmission to a base station by a user equipment through an unlicensed cell in a wireless communication system is provided. The method includes: receiving an uplink grant that schedules the uplink transmission in at least one subframe from the base station; and performing the uplink transmission in the at least one subframe using at least one of a first type channel access or a second type channel access. The uplink transmission is performed using the second type channel access when all of the at least one subframe is included in a predetermined interval determined based on a downlink transmission through the unlicensed cell from the base station.

Abstract: The present invention provides a channel switching method and device, the method performed by a multi-link device (MLD) comprising a plurality of stations, which respectively operate in a plurality of links, in a wireless communication system. Particularly, the MLD of the present invention may: receive a frame comprising channel switching information for channel switching from a first AP of a primary link from among the plurality of links; and determine whether or not channel switching is to be performed for a station connected to a second AP by means of a subsidiary link, on the basis of the channel switching information.

Abstract: The present invention relates to a method for performing uplink transmission to a base station through an unlicensed cell in a wireless communication system, in particular, the invention provides a method including: receiving, from the base station, an uplink grant scheduling the uplink transmission on one or more subframes; and performing the uplink transmission on the one or more subframes using one of a first type channel access or a second type channel access indicated in the uplink grant, wherein a parameter for the first type channel access is determined according to a priority included in the uplink grant, and wherein when the uplink grant indicates the second type channel access, the priority is a priority used in a downlink channel access of the base station.