Abstract: A method and device for a power saving operation in a communication system supporting multiple links includes a method of a first device including the steps of performing a PS setting procedure with a second device; generating a first frame including a first data unit, for initiating a transmission operation according to the PS setting procedure; and transmitting the first frame to the second device in a first link mapped to the first data unit among multiple links set between the first device and the second device.

Abstract: A method and a device for receiving downlink traffic in a communication system supporting multiple links are disclosed. An operation method of a first device includes the steps of: transmitting a traffic indication map (TIM) through a first link from among multiple links; transmitting, through the first link, first information for indicating one or more links through which a data unit stored in the first device is transmitted; and using the one or more links indicated by the first information, so as to transmit the data unit to a second device indicated by the TIM.

Abstract: Disclosed are a method and device for transmitting and receiving data in a communication system supporting multiple links. The method of a first device comprises the steps of: performing a first backoff operation for a first AC in a first link; performing a second backoff operation for a second AC in the first link; performing a third backoff operation for a third AC in a second link; if the first backoff operation and the second backoff operation in the first link are performed successfully, selecting one AC from among the first AC and the second AC; and, if the third backoff operation is performed successfully, simultaneously performing a first transmission operation of a first frame comprising a data unit corresponding to the selected one AC in the first link and a second transmission operation of a second frame comprising a data unit corresponding to the third AC in the second link.

Abstract: In a method and device for transmitting and receiving a response frame in a wireless system supporting multiple links, a method of a first device includes the steps of: performing a first backoff operation for a first AC in a first link; performing a second backoff operation for a second AC in a second link; “when the first backoff operation is completed and one or more conditions are met”, transmitting, in the first link, a first data frame including one or more data units corresponding to the first AC and information indicating the transmission of an ML BA frame; when the second backoff operation is completed, transmitting, in the second link, a second data frame including one or more data units corresponding to the second AC; and receiving the ML BA frame after transmitting the second data frame in the second link.

Abstract: In a method and a device for a MLSR operation in a wireless LAN, an operation method of a first device includes the steps of: performing first communication with a second device in a first link; performing a listening operation in one or more links after the end of the first communication; and starting a delay timer in a second link from among one or more links, wherein the first device does not initiate a frame transmission operation in the second link during the time corresponding to the delay timer.

Abstract: A method and a device for transmitting/receiving data in a communication system supporting a multi-link includes a method of a first device, including the steps of: performing a first back-off operation on a first data frame in a first link; performing a second back-off operation on a second data frame in a second link; transmitting the first data frame to a second device in the first link if the first back-off operation is successful; generating a second data frame part #1 and a second data frame part #2 by performing a fragmentation operation for the second data frame in order to match a transmission completion point of the second data frame with a transmission completion point of the first data frame if the second back-off operation is successful during the transmission of the first data frame; and transmitting the second data frame part #1 to the second device in the second link.

Abstract: A method and device for transmitting and receiving data in a communication system supporting multiple links include the steps of performing a first backoff operation for a first frame to be transmitted to first STA MLD in a first link from among multiple links; performing a second backoff operation for a second frame to be transmitted to second STA MLD in the first link; deferring transmission to the first frame if the first backoff operation is complete and communication between the AP MLD and the first STA MLD is established in a second link from among the multiple links; and transmitting the second frame to the second STA MLD in the first link if the second backoff operation is complete.

Abstract: Disclosed are a method and a device for saving power in a communication system supporting multiple links. An operation method of a first STA affiliated with a first device comprises: transmitting, to a first AP affiliated with a second device, a first frame which requests configuration of one or more TWT SPs for multiple links including a first link and a second link being in an NSTR relationship; and receiving, from the first AP, a second frame including configuration information of the one or more TWT SPs, wherein the one or more TWT SPs in the first link and the one or more TWT SPs in the second link are identically configured.

Abstract: A method and a device are disclosed for address resolution protocol (ARP) operation in a communication system supporting multiple links. An operation method of a first device comprises the steps of: receiving, from a communication node, an ARP request packet requesting the transmission of a MAC address of a second device connected to the first device; finding, in an ARP table stored in the first device, a representative MAC address of the second device requested by the ARP request packet; and transmitting an ARP response packet including the representative MAC address to the communication node.

Abstract: A method and a device are disclosed for low-power operation-based communication in a communication system supporting a multi-link. An operation method of a first device comprises the steps of: transitioning the operating state of a first device from a sleep state to an awake state in a first link of a multi-link; receiving a beacon frame from a second device in the first link; transmitting a first PS-Poll frame to the second device in the first link if the beacon frame indicates that a data frame to be transmitted is present in the first link; and performing a transmission/reception operation for a data frame with the second device in the first link after transmitting the first PS-Poll frame.

Abstract: An apparatus for recognizing a driving lane based on multiple sensors is provided. The apparatus includes a first sensor configured to calculate road information, a second sensor configured to calculate moving obstacle information, a third sensor configured to calculate movement information of a vehicle, and a controller configured to remove the moving obstacle information from the road information to extract only road boundary data, accumulate the road boundary data to calculate a plurality of candidate location information on the vehicle based on the movement information, and select final candidate location information from the plurality of candidate location information.

Abstract: A method and device are disclosed for transmitting/receiving a frame in a multi-link-supporting communication system. An operation method of a first device comprises the steps of: receiving a first beacon frame in a first link from a second device; carrying out a monitoring operation in a second link in order to receive a second beacon frame from the second device; and if the second beacon frame is not received in the second link, determining that the second link is in an unreachable state.

Abstract: Electromagnetic-wave-absorbing particles for a GHz band are represented by the following [Empirical Formula 1] and include M-type hexaferrite as a major phase: Sr1-xRxFey-2zM2zOa,??[Empirical Formula 1] where R is one or more selected from Ba, Ca, and La, M is one or more selected from Zn, Ti, and Zr, 0<x?0.8, 8?y?14, 0<z?1.5, and a is 19.

Abstract: An electromagnetic wave absorbing particle has a composition, which is represented by Formula 1 of Sr1-xRxFey-2zM2zOa and contains M-type hexaferrite as a main phase. In Formula 1, R is one or more substances selected from among Ba, Ca, and La, M is one or more substances selected from among Co, Ti, and Zr, 0<x?0.8, 8?y?14, 0<z?1.5, and a is equal to 19.

Abstract: Disclosed are a method and a device for indicating data transmission in a communication system supporting multiple links. A first device operating method comprises: generating a data frame including first information indicating a communication method in multiple links including a first link and a second link; transmitting the data frame to a second device in the multiple links; and receiving an ACK frame for the data frame from the second device in one or more links from among the multiple links.

Abstract: Disclosed are a method and apparatus for transmitting and receiving data in a communication system supporting multiple links. A method for operation of a first device comprises the steps of: transmitting, in a first link from among multiple links, a first RTS frame to a second device; receiving, from the second device in the first link, a first CTS frame that is a response to the first RTS frame; when the first CTS frame is received, transmitting, in the first link, a first data frame to the second device; and transmitting, in a second link during transmission of the first data frame, a second RTS frame to the second device.

Abstract: A method and a device are disclosed for direct communication in a wireless local area network (LAN) system. An operation method of an access point comprises the steps of: transmitting a first frame including time information of a first communication period to a first station in order to configure the first communication period; receiving, from the first station, a second frame that is a response frame to the first frame, and configuring the first communication period; and after receiving the second frame, transmitting a third frame including time information of a second communication period to a second station in order to configure the second communication period within the first communication period.

Abstract: Disclosed are a method and device for transmitting and receiving data in a communication system supporting multiple links. A method of operating a first device comprises: performing an operation for receiving a first frame from a second device in a first link among multiple links; performing a channel access operation to transmit a second frame to the second device in a second link among the multiple links during a period corresponding to the reception period of the first frame; and transmitting the second frame to the second device in the second link “after the channel access operation is completed and the reception period ends”.

Abstract: A method and device are disclosed for channel connection in a wireless communication system supporting multiple links. An operation method for the device comprises the steps of: performing a first back-off operation in a first link among multiple links; stopping the first back-off operation when the first link is determined to be in a busy state due to the first back-off operation; and using a new back-off counter value to perform a second back-off operation in a second link among the multiple links when the second link is in an idle state in a preset period prior to the point in time at which the first back-off operation is stopped.

Abstract: An apparatus for compensating a channel based on an artificial neural network includes a channel learning device that learns a property of the channel, and a channel compensating device that compensates for an error of the channel based on a learning result of the channel learning device.