Lg Electronics Inc.

Seoyoung Back

Woosuk Ko

Giwon Park

Seungmin Lee

Jongseob Baek

Sungryong Hong

Jongwoo Hong

Hanbyul Seo

Jongyoul Lee

Sangchul Moon

Youngdae Lee

Daesung Hwang

Seungryul Yang

Heejin Kim

Jaeho Hwang

Sunghoon Jung

An embodiment relates to a method for selecting a sidelink relay in a wireless communication system. The method comprises: selecting, by remote UE, at least one candidate relay UE; and selecting, by the remote UE, relay UE from among the at least one candidate relay UE, wherein the selection of the at least one candidate relay UE is on the basis of sidelink signal strength of each of the at least one candidate relay UE, and the selection of the relay UE is on the basis of comparison between a cell ID of each of the at least one candidate relay UE and a cell ID selected according to Uu link signal strength.

Operating method related to selection of relay UE in wireless communication system

An embodiment provides an operation method of a relay UE related to a sidelink relay in a wireless communication system, the method comprising: receiving, by a relay UE, a relay request from a first remote UE; and determining, by the relay UE, whether to accept the relay request of the first remote UE, wherein the relay request includes first quality of service (QOS)-related information, and the relay UE accepts the relay request on the basis that resource allocation satisfying the first QoS-related information to the first remote UE is possible.

Operation method of relay UE related to relay establishment request in wireless communication system

Provided are a method for performing wireless communication by a first device relaying communication between a second device and a base station, and an apparatus for supporting same. The method may comprise the steps of: establishing a first radio resource control (RRC) connection to the base station; establishing a PC5 connection to the second device; on the basis that there is no data transmission and reception between the first device and the base station, initiating a Uu data inactivity timer; on the basis that there is no data transmission and reception between the first device and the second device, initiating a sidelink (SL) data inactivity timer; and on the basis that the Uu data inactivity timer and the SL data inactivity timer are expired, releasing the first RRC connection between the first device and the base station.

Method and apparatus for performing relaying on basis of data inactivity timer

A method for performing wireless communication by a first device and an apparatus supporting the same are proposed. For example, the first device may obtain an SL DRX configuration including information related to an SL DRX cycle and information related to a timer for active time. For example, the timer for active time may include at least one of an SL DRX on-duration timer or an SL DRX inactivity timer. For example, the first device may trigger SL DRX command MAC CE reporting related to the PC5-RRC connection. For example, the first device may cancel the triggered SL DRX command MAC CE reporting, based on an MAC reset for the PC5-RRC connection being requested.

Method and apparatus for performing radio communication related to mac reset in NR V2X

A first UE of the present disclosure identifies a first resource for first data and a second resource for second data, transmits, to a second UE, the first data on the basis of control information for allocating the first resource and the first resource, the control information not including reservation information about the second resource notifying of the location of the second resource on the basis of the time interval between the first resource and the second resource being larger than the time interval permitted for the resource reservation, identifies a third resource for the second data in the activation section of a DRX cycle of the second UE, and transmits, to the second UE, the second data on the basis of control information for allocating the third resource and the third resource.

Method and device for resource allocation in wireless communication system

Provided are a method for performing wireless communication by a first device and a device supporting same. The method may comprise the steps of: receiving, from a second device, a first physical sidelink control channel (PSCCH) and a first physical sidelink shared channel (PSSCH) associated with the first PSCCH; receiving, from a third device, a second PSCCH and a second PSSCH associated with the second PSCCH; storing data received over the first PSSCH in a first buffer; storing data received over the second PSSCH in a second buffer; transmitting, to a base station, a scheduling request (SR) and/or a buffer status report (BSR) associated with the first buffer, on the basis that available data is in the first buffer; receiving information associated with a first resource from the base station as a response to the SR and/or BSR associated with the first buffer; and transmitting the data on the first buffer to a fourth device by means of the first resource.

Method and device for requesting transmission resource for relay in NR V2X

Provided are a method for performing wireless communication by a first device, and a device supporting same. The method may comprise the steps of: establishing a radio resource control (RRC) connection with a base station; establishing a PC5 connection with a second device that relays communication between the first device and the base station; setting, on the basis of establishment of the PC5 connection with the second device, a power saving mode for saving power related to Uu communication between the base station and the first device; and performing communication with the base station on the basis of the power saving mode.

Method and device for performing communication on basis of power saving mode

An embodiment relates to an operating method of a UE related to a sidelink relay in a wireless communication system, the operating method comprising: receiving, by the UE, a relay functionality enable-related request message; setting, by the UE, a timer; and enabling, by the UE, relay functionality on the basis of expiration of the timer, wherein the timer is released on the basis of receiving a broadcast message notifying relay functionality enable.

Operating method of UE related to relay in wireless communication system

Proposed is an operation method of a first device () in a wireless communication system. The method may comprise the steps of: starting a first timer associated with an on-duration period; receiving, from a second device () via a physical sidelink control channel (PSCCH), first sidelink control information (SCI) for the scheduling of second SCI; receiving, from the second device () via a physical sidelink shared channel (PSSCH), the second SCI, which includes a 16-bit first destination identifier (ID), and a medium access control (MAC) header, which includes an eight-bit second destination ID; acquiring a third destination ID on the basis of the first destination ID and the second destination ID; comparing the third destination ID with a 24-bit first source ID of a first device (); starting a second timer on the basis of the first source ID which is the same as the third destination ID; and carrying out sidelink communication with the second device () on the basis of the second timer which is operating.

Method and device for carrying out timer-based power saving in NR V2X

Provided are a method for a first device carrying out wireless communication, and an apparatus supporting same. The method may comprise the steps of: transmitting sidelink control information (SCI) to a second device via a physical sidelink control channel (PSCCH); transmitting data to the second device via a physical sidelink shared channel (PSSCH) which is associated with the PSCCH; determining a physical sidelink feedback channel (PSFCH) resource on the basis of a slot and subchannel associated with the PSSCH: increasing a DTX counter by one on the basis of failing to receive hybrid automatic repeat request (HARQ) feedback on the PSFCH resource; receiving, from the second device, information related to dropping the transmission of the HARQ feedback; and decreasing the DTX counter by N on the basis of the information related to dropping the transmission of the HARQ feedback. Sidelink (SL) radio link failure (RLF) may be declared on the basis that the DTX counter reaches the maximum number of DTXs, and N may be a positive integer.

Method and device for RLF in NR V2X

One embodiment is a method for operating a relay user equipment (UE) related to sidelink relay in a wireless communication system, the method comprising: a relay UE establishing a connection with a remote UE; the relay UE transmitting or receiving a packet related to the remote UE to/from a base station; and the relay UE declaring a radio link failure (RLF), wherein the RLF is related to a Uu link, and the relay UE transmits a message notifying of the RLF to the remote UE, the message being related to a relay reselection trigger.

Method for operating UE related to relay in wireless communication system

A method and apparatus for Sidelink (SL) Discontinuous Reception (DRX) operation based on multiple DRX configurations and prioritization is provided. A third wireless device receives, from a first wireless device, first Sidelink (SL) Discontinuous Reception (DRX) information, and receives, from a second wireless device, second SL DRX information. The third wireless device informs a network about the first and second SL DRX information, each of which is constructed for each pair of source and destination.

Sidelink DRX operation based on multiple DRX configurations and prioritization

According to one embodiment of the present disclosure, provided is a method by which a first apparatus performs sidelink communication. In one example, provided is a method by which the first device saves power for sidelink communication in NR V2X.

Method and device for saving power for sidelink communication in NR V2X

A sidelink communication method considering height information and an apparatus therefor are provided. A method of transmitting data by a first user equipment (UE) to a second UE in a wireless communication system includes transmitting a physical sidelink control channel (PSCCH) including first sidelink control information (SCI) to the second UE, transmitting a physical sidelink shared channel (PSSCH) including second SCI related to the first SCI to the second UE, and receiving a physical sidelink feedback channel (PSFCH) for the PSSCH from the second UE. The second SCI includes control information about a hybrid automatic repeat request (HARQ) operation, and the control information about the HARQ operation includes control information about a height.

Sidelink communication method considering height information and apparatus therefor

A first device receives information related to an absolute location of a positioning reference from the positioning reference; obtains a first PRS reception timing based on a positioning reference signal (PRS) received from the positioning reference; obtains a second PRS reception timing at which a second device receives the PRS from the positioning reference, based on a phase difference value between first RSs received on first subcarriers from the second device; obtains a third PRS reception timing at which a third device receives the PRS from the positioning reference, based on a phase difference value between second RSs received on second subcarriers from the third device; estimates a relative location of the positioning reference, based on the first PRS reception timing, the second PRS reception timing, and the third PRS reception timing; and obtains location information of the first device based on the absolute location and the relative location.

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Seoul, South Korea

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