Method and device for transmitting or receiving physical sidelink feedback channel in wireless communication system

Patent metadata

Field	Value
Publication number	US-2023199804-A1
Application number	US-202318109682-A
Country	US
Kind code	A1
Filing date	Feb 14, 2023
Priority date	Apr 14, 2021
Publication date	Jun 22, 2023
Grant date	—

Abstract

A method for transmitting a physical sidelink feedback channel (PSFCH) by a first terminal in a wireless communication system according to an embodiment of the present specification comprises the steps of: receiving configuration information related to the PSFCH from a second terminal; receiving a physical sidelink control channel (PSCCH) from the second terminal, wherein the PSCCH is related to scheduling of a physical sidelink shared channel (PSSCH); and transmitting the PSFCH to the second terminal. The PSFCH is transmitted in a slot on the basis of the PSFCH including collision information. The slot is determined on the basis of the number of preconfigured slots and a resource reserved on the basis of sidelink control information (SCI) related to the PSCCH.

First claim

What is claimed is:

1 . A method of a first User Equipment (UE) for transmitting a Physical Sidelink Feedback Channel (PSFCH) in a wireless communication system, the method comprising:
receiving, from a second UE, a Physical Sidelink Control Channel (PSCCH), wherein Sidelink Control Information (SCI) related to the PSCCH is for scheduling of a Physical Sidelink Shared Channel (PSSCH); and transmitting, to the second UE, the PSFCH, wherein information provided by the PSFCH includes i) HARQ-ACK information related to a reception of the PSSCH or ii) conflict information related to a reception of the PSSCH, wherein, based on the information provided by the PSFCH including the conflict information, the PSFCH is transmitted in a slot that is at least T 3 slots before a slot of a reserved resource based on the SCI related to the PSCCH, wherein the T 3 is equal to T p r o c , 1 S L determined based on a SubCarrier Spacing (SCS) configuration of a SideLink Bandwidth Part (SL BWP).

2 . The method of claim 1 , further comprising: receiving, from a base station, configuration information related to the PSFCH, via RRC signaling.

3 . The method of claim 1 , wherein the slot is based on a slot that is at least a number of slots after a slot on which the SCI is received, and
wherein the number of slots is determined based on a value of an sl-MinTimeGapPSFCH parameter related to a minimum time gap between the PSSCH and the PSFCH.

4 . The method of claim 3 , wherein the conflict information is based on the SCI not received later than the number of slots before the slot in which the PSFCH is transmitted.

5 . The method of claim 1 , wherein, based on the information provided by the PSFCH including the conflict information, a priority related to a reception of the PSFCH by the second UE is determined based on a priority related to the reserved resource based on the SCI.

6 . The method of claim 1 , wherein the PSFCH related to the conflict information is transmitted based on inability to receive the PSSCH in the reserved resource based on the SCI due to half-duplex operation of the first UE, and
the half-duplex operation of the first UE includes a transmission operation or a reception operation of the first UE.

7 . The method of claim 1 , wherein the PSFCH related to the conflict information is transmitted based on overlapping of the reserved resource based on the SCI with a reserved resource based on SCI of a third UE, and
the third UE is different from the second UE.

8 . The method of claim 1 , wherein the receiving the PSCCH comprising:
receiving, from the second UE, a first PSCCH, wherein SCI related to the first PSCCH is for scheduling of a first PSSCH; receiving, from the second UE, the first PSSCH; and receiving, from the second UE, a second PSCCH, wherein SCI related to the second PSCCH is for scheduling of a second PSSCH, wherein the transmitting the PSFCH comprising:
transmitting, to the second UE, a first PSFCH providing the HARQ-ACK information related to the reception of the first PSSCH; and
transmitting, to the second UE, a second PSFCH providing the conflict information related to a reception of the second PSSCH.

9 . The method of claim 8 , wherein the first PSFCH and the second PSFCH are transmitted in different Physical Resource Blocks (PRBs), and
wherein the first PSFCH is transmitted in at least one first PRB of the slot and the second PSFCH is transmitted in at least one second PRB of the slot.

10 . The method of claim 8 , wherein a slot in which the first PSFCH is transmitted is different from the slot in which the second PSFCH is transmitted.

11 . A first user equipment (UE) transmitting a Physical Sidelink Feedback Channel (PSFCH) in a wireless communication system, the first UE comprising:
one or more transceivers; one or more processors controlling the one or more transceivers; and one or more memories operably connected to the one or more processors, wherein the one or more memories store instructions for performing operations based on being executed by the one or more processors, wherein the operations includes:
receiving, from a second UE, a Physical Sidelink Control Channel (PSCCH), wherein Sidelink Control Information (SCI) related to the PSCCH is for scheduling of a Physical Sidelink Shared Channel (PSSCH); and
transmitting, to the second UE, the PSFCH,
wherein information provided by the PSFCH includes i) HARQ-ACK information related to a reception of the PSSCH or ii) conflict information related to a reception of the PSSCH,
wherein, based on the information provided by the PSFCH including the conflict information, the PSFCH is transmitted in a slot that is at least T 3 slots before a slot of a reserved resource based on the SCI related to the PSCCH,
wherein the T 3 is equal to
T p r o c , 1 S L
determined based on a SubCarrier Spacing (SCS) configuration of a SideLink BandWidth Part (SL BWP).

12 . A method of a second User Equipment (UE) for receiving a Physical Sidelink Feedback Channel (PSFCH) in a wireless communication system, the method comprising:
transmitting, to a first UE, a Physical Sidelink Control Channel (PSCCH), wherein Sidelink Control Information (SCI) related to the PSCCH is for scheduling of a Physical Sidelink Shared Channel (PSSCH); and receiving, from the first UE, the PSFCH, wherein information provided by the PSFCH includes i) HARQ-ACK information related to a reception of the PSSCH by the first UE or ii) conflict information related to a reception of the PSSCH by the first UE, wherein, based on the information provided by the PSFCH including the conflict information, the PSFCH is received in a slot that is at least T 3 slots before a slot of a reserved resource based on the SCI related to the PSCCH, wherein the T 3 is equal to T p r o c , 1 S L determined based on a SubCarrier Spacing (SCS) configuration of a SideLink Bandwidth Part (SL BWP).

Assignees

• Lg Electronics Inc

Inventors

• Hwang Daesung
• Lee Seungmin
• Seo Hanbyul

Classifications

• H04W72/12

  Wireless traffic scheduling · CPC title

• H04W72/25 Primary

  between terminals via a wireless link, e.g. sidelink · CPC title

• H04L27/26025

  Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking (allocating sub-channels of the transmission path H04L5/003) · CPC title

• H04W72/231

  the control data signalling from the layers above the physical layer, e.g. RRC or MAC-CE signalling · CPC title

• H04W72/0457

  Variable allocation of band or rate · CPC title