WO2021230695A1

WO2021230695A1 - Method and device for reporting sl harq feedback to base station in nr v2x

Info

Publication number: WO2021230695A1
Application number: PCT/KR2021/006050
Authority: WO
Inventors: 이승민; 서한별
Original assignee: 엘지전자 주식회사
Priority date: 2020-05-14
Filing date: 2021-05-14
Publication date: 2021-11-18
Also published as: CN116158037A; KR20230010645A

Abstract

A method for performing wireless communication by a first device and a device supporting same may be provided. The method may comprise the steps of: receiving, from a base station, information related to an uplink (UL) resource for reporting sidelink (SL) hybrid automatic repeat request (HARQ) feedback to the base station; transmitting first sidelink control information (SCI) to a second device through a physical sidelink control channel (PSCCH); transmitting second SCI and a medium access control protocol data unit (MAC PDU) to the second device through a physical sidelink shared channel (PSSCH) related to the PSCCH; determining a physical sidelink feedback channel (PSFCH) resource on the basis of an index of a sub channel and an index of a slot related to the PSSCH; and transmitting the SL HARQ feedback on the MAC PDU to the base station on the basis of the UL resource. A minimum time gap between the PSFCH resource and the UL resource may be determined on the basis of N, X, numerology of an SL bandwidth part (BWP), and numerology of a UL BWP, wherein N may be determined on the basis of a minimum value among the numerology of the SL BWP and the numerology of the UL BWP, and X may be determined on the basis of information related to a priority.

Description

Method and apparatus for reporting SL HARQ feedback to a base station in NR V2X

The present disclosure relates to a wireless communication system.

A sidelink (SL) refers to a communication method in which a direct link is established between user equipment (UE), and voice or data is directly exchanged between terminals without going through a base station (BS). SL is being considered as one way to solve the burden of the base station due to the rapidly increasing data traffic. V2X (vehicle-to-everything) refers to a communication technology that exchanges information with other vehicles, pedestrians, and infrastructure-built objects through wired/wireless communication. V2X can be divided into four types: vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-network (V2N), and vehicle-to-pedestrian (V2P). V2X communication may be provided through a PC5 interface and/or a Uu interface.

Meanwhile, as more and more communication devices require a larger communication capacity, the need for improved mobile broadband communication compared to the existing radio access technology (RAT) is emerging. Accordingly, a communication system in consideration of a service or terminal sensitive to reliability and latency is being discussed, and improved mobile broadband communication, massive Machine Type Communication (MTC), and Ultra-Reliable and Low Latency Communication (URLLC) are being discussed. The next-generation radio access technology in consideration of the above may be referred to as a new radio access technology (RAT) or a new radio (NR). Even in NR, vehicle-to-everything (V2X) communication may be supported.

1 is a diagram for explaining a comparison of V2X communication based on RAT before NR and V2X communication based on NR. The embodiment of FIG. 1 may be combined with various embodiments of the present disclosure.

In relation to V2X communication, in RAT prior to NR, based on V2X messages such as BSM (Basic Safety Message), CAM (Cooperative Awareness Message), and DENM (Decentralized Environmental Notification Message), a method of providing a safety service (safety service) This was mainly discussed. The V2X message may include location information, dynamic information, attribute information, and the like. For example, the UE may transmit a periodic message type CAM and/or an event triggered message type DENM to another UE.

Since, in relation to V2X communication, various V2X scenarios are being presented in NR. For example, various V2X scenarios may include vehicle platooning, advanced driving, extended sensors, remote driving, and the like.

Meanwhile, in order for the terminal to report HARQ feedback related to SL communication to the base station, a UL resource may be configured for the terminal. In this case, the UE may determine SL HARQ feedback information (eg, ACK or NACK) based on monitoring for a physical sidelink feedback channel (PSFCH) resource, and the UE transmits the SL HARQ feedback information based on the UL resource to the base station. can be sent to Through this, the base station can determine whether to allocate additional resources to the terminal.

On the other hand, it is necessary to ensure a minimum time gap between the UL resource and the PSFCH resource. Furthermore, the minimum time gap needs to be efficiently adjusted by reflecting the characteristics of SL communication.

In one embodiment, a method for a first device to perform wireless communication is provided. The method includes: receiving, from a base station, information related to an uplink (UL) resource for reporting sidelink (SL) hybrid automatic repeat request (HARQ) feedback to the base station; transmitting first sidelink control information (SCI) to a second device through a physical sidelink control channel (PSCCH); transmitting a second SCI and MAC PDU (medium access control protocol data unit) to the second device through a physical sidelink shared channel (PSSCH) related to the PSCCH; determining a physical sidelink feedback channel (PSFCH) resource based on the index of the slot and the index of the subchannel related to the PSSCH; and transmitting the SL HARQ feedback for the MAC PDU to the base station based on the UL resource. The minimum time gap between the PSFCH resource and the UL resource may be determined based on N, X, the numerology of the SL BWP (bandwidth part), and the numonology of the UL BWP, where N is the numerology of the SL BWP and the It may be determined based on the minimum value among the numerologies of the UL BWP, and X may be determined based on information related to priority.

In an embodiment, a first device for performing wireless communication is provided. The first apparatus may include one or more memories for storing instructions; one or more transceivers; and one or more processors connecting the one or more memories and the one or more transceivers. the one or more processors execute the instructions to receive, from a base station, information related to an uplink (UL) resource for reporting sidelink (SL) hybrid automatic repeat request (HARQ) feedback to the base station; transmit first sidelink control information (SCI) to the second device through a physical sidelink control channel (PSCCH); transmit a second SCI and a MAC PDU (medium access control protocol data unit) to the second device through a physical sidelink shared channel (PSSCH) related to the PSCCH; determine a physical sidelink feedback channel (PSFCH) resource based on the index of the slot and the index of the subchannel related to the PSSCH; and based on the UL resource, the SL HARQ feedback for the MAC PDU may be transmitted to the base station. The minimum time gap between the PSFCH resource and the UL resource may be determined based on N, X, the numerology of the SL BWP (bandwidth part), and the numerology of the UL BWP, where N is the numerology of the SL BWP and the It may be determined based on the minimum value among the numerologies of the UL BWP, and X may be determined based on information related to priority.

The terminal can efficiently perform SL communication.

1 is a diagram for explaining a comparison of V2X communication based on RAT before NR and V2X communication based on NR.

2 shows a structure of an NR system according to an embodiment of the present disclosure.

3 illustrates a radio protocol architecture according to an embodiment of the present disclosure.

4 shows the structure of an NR radio frame according to an embodiment of the present disclosure.

5 illustrates a slot structure of an NR frame according to an embodiment of the present disclosure.

6 shows an example of a BWP according to an embodiment of the present disclosure.

7 illustrates a terminal performing V2X or SL communication, according to an embodiment of the present disclosure.

8 illustrates a procedure for a terminal to perform V2X or SL communication according to a transmission mode, according to an embodiment of the present disclosure.

9 illustrates three types of casts according to an embodiment of the present disclosure.

10 illustrates a resource unit for CBR measurement according to an embodiment of the present disclosure.

11 illustrates a procedure in which a UE reports SL HARQ feedback to a base station according to an embodiment of the present disclosure.

12 illustrates a mapping method between a PSSCH resource and a PSFCH resource and a mapping between a PSFCH resource and a UL resource according to an embodiment of the present disclosure.

13 illustrates a method for a first device to perform wireless communication, according to an embodiment of the present disclosure.

14 illustrates a method for a base station to perform wireless communication, according to an embodiment of the present disclosure.

15 shows a communication system 1 according to an embodiment of the present disclosure.

16 illustrates a wireless device according to an embodiment of the present disclosure.

17 illustrates a signal processing circuit for a transmission signal according to an embodiment of the present disclosure.

18 illustrates a wireless device according to an embodiment of the present disclosure.

19 illustrates a portable device according to an embodiment of the present disclosure.

20 illustrates a vehicle or an autonomous driving vehicle according to an embodiment of the present disclosure.

In this specification, "A or B (A or B)" may mean "only A", "only B", or "both A and B". In other words, "A or B (A or B)" herein may be interpreted as "A and/or B (A and/or B)". For example, "A, B or C(A, B or C)" herein means "only A", "only B", "only C", or "any and any combination of A, B and C ( any combination of A, B and C)".

As used herein, a slash (/) or a comma (comma) may mean “and/or”. For example, “A/B” may mean “A and/or B”. Accordingly, “A/B” may mean “only A”, “only B”, or “both A and B”. For example, “A, B, C” may mean “A, B, or C”.

As used herein, “at least one of A and B” may mean “only A”, “only B” or “both A and B”. Also, in the present specification, the expression “at least one of A or B” or “at least one of A and/or B” means “at least one of A and/or B”. It can be interpreted the same as "A and B (at least one of A and B)".

Also, as used herein, "at least one of A, B and C" means "only A", "only B", "only C", or "A, B and C" any combination of A, B and C". Also, “at least one of A, B or C” or “at least one of A, B and/or C” means can mean "at least one of A, B and C".

In addition, parentheses used herein may mean "for example". Specifically, when displayed as “control information (PDCCH)”, “PDCCH” may be proposed as an example of “control information”. In other words, "control information" in the present specification is not limited to "PDCCH", and "PDDCH" may be proposed as an example of "control information". In addition, even when displayed as “control information (ie, PDCCH)”, “PDCCH” may be proposed as an example of “control information”.

In this specification, technical features that are individually described within one drawing may be implemented individually or simultaneously.

The following technologies include code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. It can be used in various wireless communication systems. CDMA may be implemented with a radio technology such as universal terrestrial radio access (UTRA) or CDMA2000. TDMA may be implemented with a radio technology such as global system for mobile communications (GSM)/general packet radio service (GPRS)/enhanced data rates for GSM evolution (EDGE). OFDMA may be implemented with a wireless technology such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and evolved UTRA (E-UTRA). IEEE 802.16m is an evolution of IEEE 802.16e, and provides backward compatibility with a system based on IEEE 802.16e. UTRA is part of the universal mobile telecommunications system (UMTS). 3rd generation partnership project (3GPP) long term evolution (LTE) is a part of evolved UMTS (E-UMTS) using evolved-UMTS terrestrial radio access (E-UTRA), and employs OFDMA in downlink and SC in uplink - Adopt FDMA. LTE-A (advanced) is an evolution of 3GPP LTE.

5G NR is a successor technology of LTE-A, and is a new clean-slate type mobile communication system with characteristics such as high performance, low latency, and high availability. 5G NR can utilize all available spectrum resources, from low frequency bands below 1 GHz to intermediate frequency bands from 1 GHz to 10 GHz, and high frequency (millimeter wave) bands above 24 GHz.

For clarity of description, 5G NR is mainly described, but the technical idea according to an embodiment of the present disclosure is not limited thereto.

2 shows a structure of an NR system according to an embodiment of the present disclosure. The embodiment of FIG. 2 may be combined with various embodiments of the present disclosure.

Referring to FIG. 2 , a Next Generation-Radio Access Network (NG-RAN) may include a base station 20 that provides user plane and control plane protocol termination to the terminal 10 . For example, the base station 20 may include a next generation-Node B (gNB) and/or an evolved-NodeB (eNB). For example, the terminal 10 may be fixed or mobile, and other terms such as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), and a wireless device can be called For example, the base station may be a fixed station communicating with the terminal 10 , and may be referred to as a base transceiver system (BTS), an access point, or other terms.

The embodiment of FIG. 2 exemplifies a case including only gNBs. The base stations 20 may be connected to each other through an Xn interface. The base station 20 may be connected to a 5G core network (5G Core Network: 5GC) through an NG interface. More specifically, the base station 20 may be connected to an access and mobility management function (AMF) 30 through an NG-C interface, and may be connected to a user plane function (UPF) 30 through an NG-U interface. .

The layers of the Radio Interface Protocol between the terminal and the network are based on the lower three layers of the Open System Interconnection (OSI) standard model widely known in communication systems. layer), L2 (layer 2, second layer), and L3 (layer 3, third layer). Among them, the physical layer belonging to the first layer provides an information transfer service using a physical channel, and the RRC (Radio Resource Control) layer located in the third layer is a radio resource between the terminal and the network. plays a role in controlling To this end, the RRC layer exchanges RRC messages between the terminal and the base station.

3 illustrates a radio protocol architecture according to an embodiment of the present disclosure. The embodiment of FIG. 3 may be combined with various embodiments of the present disclosure. Specifically, Fig. 3 (a) shows a radio protocol stack of a user plane for Uu communication, and Fig. 3 (b) is a radio protocol of a control plane for Uu communication. Represents a stack. FIG. 3C shows a radio protocol stack of a user plane for SL communication, and FIG. 3D shows a radio protocol stack of a control plane for SL communication.

Referring to FIG. 3 , a physical layer provides an information transmission service to an upper layer using a physical channel. The physical layer is connected to a medium access control (MAC) layer, which is an upper layer, through a transport channel. Data moves between the MAC layer and the physical layer through the transport channel. Transmission channels are classified according to how and with what characteristics data is transmitted over the air interface.

Data moves through physical channels between different physical layers, that is, between the physical layers of the transmitter and the receiver. The physical channel may be modulated in an Orthogonal Frequency Division Multiplexing (OFDM) scheme, and time and frequency are used as radio resources.

The MAC layer provides a service to a radio link control (RLC) layer, which is an upper layer, through a logical channel. The MAC layer provides a mapping function from a plurality of logical channels to a plurality of transport channels. In addition, the MAC layer provides a logical channel multiplexing function by mapping a plurality of logical channels to a single transport channel. The MAC sublayer provides data transfer services on logical channels.

The RLC layer performs concatenation, segmentation, and reassembly of RLC service data units (SDUs). In order to guarantee the various Quality of Service (QoS) required by the radio bearer (RB), the RLC layer has a transparent mode (Transparent Mode, TM), an unacknowledged mode (Unacknowledged Mode, UM) and an acknowledged mode (Acknowledged Mode). , AM) provides three operation modes. AM RLC provides error correction through automatic repeat request (ARQ).

The RRC (Radio Resource Control) layer is defined only in the control plane. The RRC layer is responsible for controlling logical channels, transport channels and physical channels in relation to configuration, re-configuration, and release of radio bearers. RB is in the first layer (physical layer or PHY layer) and second layer (MAC layer, RLC layer, PDCP (Packet Data Convergence Protocol) layer, SDAP (Service Data Adaptation Protocol) layer) for data transfer between the terminal and the network. Logical path provided by

The functions of the PDCP layer in the user plane include delivery of user data, header compression and ciphering. The functions of the PDCP layer in the control plane include transmission of control plane data and encryption/integrity protection.

The SDAP (Service Data Adaptation Protocol) layer is defined only in the user plane. The SDAP layer performs mapping between QoS flows and data radio bearers, and marking QoS flow identifiers (IDs) in downlink and uplink packets.

Setting the RB means defining the characteristics of a radio protocol layer and channel to provide a specific service, and setting each specific parameter and operation method. The RB may be further divided into a Signaling Radio Bearer (SRB) and a Data Radio Bearer (DRB). The SRB is used as a path for transmitting an RRC message in the control plane, and the DRB is used as a path for transmitting user data in the user plane.

When an RRC connection is established between the RRC layer of the terminal and the RRC layer of the base station, the terminal is in the RRC_CONNECTED state, otherwise it is in the RRC_IDLE state. In the case of NR, an RRC_INACTIVE state is additionally defined, and a UE in an RRC_INACTIVE state may release a connection to a base station while maintaining a connection to the core network.

As a downlink transmission channel for transmitting data from the network to the terminal, there are a BCH (Broadcast Channel) for transmitting system information and a downlink SCH (Shared Channel) for transmitting user traffic or control messages. Traffic or control messages of downlink multicast or broadcast services may be transmitted through a downlink SCH or may be transmitted through a separate downlink multicast channel (MCH). On the other hand, as an uplink transmission channel for transmitting data from the terminal to the network, there are a random access channel (RACH) for transmitting an initial control message and an uplink shared channel (SCH) for transmitting user traffic or control messages.

The logical channels that are located above the transport channel and are mapped to the transport channel include a Broadcast Control Channel (BCCH), a Paging Control Channel (PCCH), a Common Control Channel (CCCH), a Multicast Control Channel (MCCH), and a Multicast Traffic Channel (MTCH). channels), etc.

4 shows the structure of an NR radio frame according to an embodiment of the present disclosure. The embodiment of FIG. 4 may be combined with various embodiments of the present disclosure.

Referring to FIG. 4, radio frames may be used in uplink and downlink transmission in NR. A radio frame has a length of 10 ms and may be defined as two 5 ms half-frames (HF). A half-frame may include 5 1ms subframes (Subframe, SF). A subframe may be divided into one or more slots, and the number of slots in a subframe may be determined according to a subcarrier spacing (SCS). Each slot may include 12 or 14 OFDM(A) symbols according to a cyclic prefix (CP).

When a normal CP (normal CP) is used, each slot may include 14 symbols. When the extended CP is used, each slot may include 12 symbols. Here, the symbol may include an OFDM symbol (or a CP-OFDM symbol), a single carrier-FDMA (SC-FDMA) symbol (or a Discrete Fourier Transform-spread-OFDM (DFT-s-OFDM) symbol).

Table 1 below shows the number of symbols per slot (N ^slot _symb ), the number of slots per ^{frame (N frame,u} _slot ) and the number of slots per subframe (N ^{subframe, u} _slot ).

SCS (152^u)SCS (152 ^u )	N^slot _symb N ^slot _symbol	N^frame,u _slot N ^{frame, u} _slot	N^subframe,u _slot N ^{subframe, u} _slot
15KHz (u=0)15KHz (u=0)	1414	1010	1One
30KHz (u=1)30KHz (u=1)	1414	2020	22
60KHz (u=2)60KHz (u=2)	1414	4040	44
120KHz (u=3)120KHz (u=3)	1414	8080	88
240KHz (u=4)240KHz (u=4)	1414	160160	1616

Table 2 illustrates the number of symbols per slot, the number of slots per frame, and the number of slots per subframe according to SCS when the extended CP is used.

SCS (152^u)SCS (152 ^u )	N^slot _symb N ^slot _symbol	N^frame,u _slot N ^{frame, u} _slot	N^subframe,u _slot N ^{subframe, u} _slot
60KHz (u=2)60KHz (u=2)	1212	4040	44

In the NR system, OFDM(A) numerology (eg, SCS, CP length, etc.) may be set differently between a plurality of cells merged into one UE. Accordingly, an (absolute time) interval of a time resource (eg, a subframe, a slot, or a TTI) (commonly referred to as a TU (Time Unit) for convenience) composed of the same number of symbols may be set differently between the merged cells.

In NR, multiple numerology or SCS to support various 5G services may be supported. For example, when SCS is 15 kHz, wide area in traditional cellular bands can be supported, and when SCS is 30 kHz/60 kHz, dense-urban, lower latency) and a wider carrier bandwidth may be supported. For SCS of 60 kHz or higher, bandwidths greater than 24.25 GHz may be supported to overcome phase noise.

The NR frequency band may be defined as two types of frequency ranges. The two types of frequency ranges may be FR1 and FR2. The numerical value of the frequency range may be changed, for example, the two types of frequency ranges may be as shown in Table 3 below. Among the frequency ranges used in the NR system, FR1 may mean "sub 6GHz range", FR2 may mean "above 6GHz range", and may be referred to as millimeter wave (mmW).

Frequency Range designationFrequency Range designation	Corresponding frequency rangeCorresponding frequency range	Subcarrier Spacing (SCS)Subcarrier Spacing (SCS)
FR1FR1	450MHz - 6000MHz450MHz - 6000MHz	15, 30, 60kHz15, 30, 60 kHz
FR2FR2	24250MHz - 52600MHz24250MHz - 52600MHz	60, 120, 240kHz60, 120, 240 kHz

As mentioned above, the numerical value of the frequency range of the NR system can be changed. For example, FR1 may include a band of 410 MHz to 7125 MHz as shown in Table 4 below. That is, FR1 may include a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or higher. For example, a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) included in FR1 may include an unlicensed band. The unlicensed band may be used for various purposes, for example, for communication for a vehicle (eg, autonomous driving).

Frequency Range designationFrequency Range designation	Corresponding frequency rangeCorresponding frequency range	Subcarrier Spacing (SCS)Subcarrier Spacing (SCS)
FR1FR1	410MHz - 7125MHz410MHz - 7125MHz	15, 30, 60kHz15, 30, 60 kHz
FR2FR2	24250MHz - 52600MHz24250MHz - 52600MHz	60, 120, 240kHz60, 120, 240 kHz

5 illustrates a slot structure of an NR frame according to an embodiment of the present disclosure. The embodiment of FIG. 5 may be combined with various embodiments of the present disclosure.

Referring to FIG. 5 , a slot includes a plurality of symbols in the time domain. For example, in the case of a normal CP, one slot may include 14 symbols, but in the case of an extended CP, one slot may include 12 symbols. Alternatively, in the case of a normal CP, one slot may include 7 symbols, but in the case of an extended CP, one slot may include 6 symbols.

A carrier wave includes a plurality of subcarriers in the frequency domain. A resource block (RB) may be defined as a plurality of (eg, 12) consecutive subcarriers in the frequency domain. BWP (Bandwidth Part) may be defined as a plurality of consecutive (P)RB ((Physical) Resource Block) in the frequency domain, and may correspond to one numerology (eg, SCS, CP length, etc.) have. A carrier may include a maximum of N (eg, 5) BWPs. Data communication can be performed through the activated BWP. Each element may be referred to as a resource element (RE) in the resource grid, and one complex symbol may be mapped.

Hereinafter, the BWP (Bandwidth Part) and the carrier will be described.

A BWP (Bandwidth Part) may be a contiguous set of PRBs (physical resource blocks) in a given neurology. A PRB may be selected from a contiguous subset of a common resource block (CRB) for a given neuronology on a given carrier.

For example, the BWP may be at least one of an active BWP, an initial BWP, and/or a default BWP. For example, the UE may not monitor downlink radio link quality in a DL BWP other than an active DL BWP on a PCell (primary cell). For example, the UE may not receive a PDCCH, a physical downlink shared channel (PDSCH), or a reference signal (CSI-RS) (except for RRM) outside of the active DL BWP. For example, the UE may not trigger CSI (Channel State Information) reporting for the inactive DL BWP. For example, the UE may not transmit a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) outside the active UL BWP. For example, in the case of downlink, the initial BWP may be given as a contiguous set of RBs for a maintaining minimum system information (RMSI) CORESET (control resource set) (set by a physical broadcast channel (PBCH)). For example, in the case of uplink, the initial BWP may be given by a system information block (SIB) for a random access procedure. For example, the default BWP may be set by a higher layer. For example, the initial value of the default BWP may be the initial DL BWP. For energy saving, if the terminal does not detect DCI for a certain period of time, the terminal may switch the active BWP of the terminal to the default BWP.

Meanwhile, BWP may be defined for SL. The same SL BWP can be used for transmission and reception. For example, the transmitting terminal may transmit an SL channel or an SL signal on a specific BWP, and the receiving terminal may receive an SL channel or an SL signal on the specific BWP. In a licensed carrier, the SL BWP may be defined separately from the Uu BWP, and the SL BWP may have separate configuration signaling from the Uu BWP. For example, the terminal may receive the configuration for the SL BWP from the base station/network. For example, the terminal may receive the configuration for Uu BWP from the base station/network. The SL BWP may be configured (in advance) for the out-of-coverage NR V2X terminal and the RRC_IDLE terminal within the carrier. For a UE in RRC_CONNECTED mode, at least one SL BWP may be activated in a carrier.

6 shows an example of a BWP according to an embodiment of the present disclosure. The embodiment of FIG. 6 may be combined with various embodiments of the present disclosure. In the embodiment of FIG. 6 , it is assumed that there are three BWPs.

Referring to FIG. 6 , a common resource block (CRB) may be a numbered carrier resource block from one end to the other end of the carrier band. And, the PRB may be a numbered resource block within each BWP. Point A may indicate a common reference point for a resource block grid (resource block grid).

BWP may be set by a point A, an offset from the point A (N ^start _BWP ), and a bandwidth (N ^size _BWP ). For example, the point A may be an external reference point of the PRB of the carrier to which subcarrier 0 of all neumatologies (eg, all neumonologies supported by the network in that carrier) is aligned. For example, the offset may be the PRB spacing between point A and the lowest subcarrier in a given numerology. For example, the bandwidth may be the number of PRBs in a given numerology.

Hereinafter, V2X or SL communication will be described.

A Sidelink Synchronization Signal (SLSS) is an SL-specific sequence and may include a Primary Sidelink Synchronization Signal (PSSS) and a Secondary Sidelink Synchronization Signal (SSSS). The PSSS may be referred to as a Sidelink Primary Synchronization Signal (S-PSS), and the SSSS may be referred to as a Sidelink Secondary Synchronization Signal (S-SSS). For example, length-127 M-sequences may be used for S-PSS and length-127 Gold sequences may be used for S-SSS . For example, the terminal may detect an initial signal using S-PSS and may obtain synchronization. For example, the UE may acquire detailed synchronization using S-PSS and S-SSS, and may detect a synchronization signal ID.

PSBCH (Physical Sidelink Broadcast Channel) may be a (broadcast) channel through which basic (system) information that the terminal needs to know first before transmission and reception of an SL signal is transmitted. For example, the basic information is information related to SLSS, duplex mode (Duplex Mode, DM), TDD UL/DL (Time Division Duplex Uplink/Downlink) configuration, resource pool related information, type of application related to SLSS, It may be a subframe offset, broadcast information, or the like. For example, for evaluation of PSBCH performance, in NR V2X, the payload size of PSBCH may be 56 bits including 24-bit CRC (Cyclic Redundancy Check).

S-PSS, S-SSS, and PSBCH may be included in a block format supporting periodic transmission (eg, SL SS (Synchronization Signal)/PSBCH block, hereinafter S-SSB (Sidelink-Synchronization Signal Block)). The S-SSB may have the same numerology (ie, SCS and CP length) as a Physical Sidelink Control Channel (PSCCH)/Physical Sidelink Shared Channel (PSSCH) in the carrier, and the transmission bandwidth is (pre)set SL Sidelink (BWP) BWP). For example, the bandwidth of the S-SSB may be 11 resource blocks (RBs). For example, the PSBCH may span 11 RBs. And, the frequency position of the S-SSB may be set (in advance). Therefore, the UE does not need to perform hypothesis detection in frequency to discover the S-SSB in the carrier.

7 illustrates a terminal performing V2X or SL communication, according to an embodiment of the present disclosure. The embodiment of FIG. 7 may be combined with various embodiments of the present disclosure.

Referring to FIG. 7 , the term terminal in V2X or SL communication may mainly refer to a user's terminal. However, when network equipment such as a base station transmits and receives signals according to a communication method between terminals, the base station may also be regarded as a kind of terminal. For example, terminal 1 may be the first apparatus 100 , and terminal 2 may be the second apparatus 200 .

For example, UE 1 may select a resource unit corresponding to a specific resource from a resource pool indicating a set of a series of resources. And, UE 1 may transmit an SL signal using the resource unit. For example, terminal 2, which is a receiving terminal, may receive a resource pool configured for terminal 1 to transmit a signal, and may detect a signal of terminal 1 in the resource pool.

Here, when the terminal 1 is within the connection range of the base station, the base station may inform the terminal 1 of the resource pool. On the other hand, when the terminal 1 is outside the connection range of the base station, another terminal informs the terminal 1 of the resource pool, or the terminal 1 may use a preset resource pool.

In general, the resource pool may be composed of a plurality of resource units, and each UE may select one or a plurality of resource units to use for its own SL signal transmission.

Hereinafter, resource allocation in the SL will be described.

8 illustrates a procedure for a terminal to perform V2X or SL communication according to a transmission mode, according to an embodiment of the present disclosure. The embodiment of FIG. 8 may be combined with various embodiments of the present disclosure. In various embodiments of the present disclosure, the transmission mode may be referred to as a mode or a resource allocation mode. Hereinafter, for convenience of description, a transmission mode in LTE may be referred to as an LTE transmission mode, and a transmission mode in NR may be referred to as an NR resource allocation mode.

For example, (a) of FIG. 8 shows a terminal operation related to LTE transmission mode 1 or LTE transmission mode 3. Or, for example, (a) of FIG. 8 shows a terminal operation related to NR resource allocation mode 1. For example, LTE transmission mode 1 may be applied to general SL communication, and LTE transmission mode 3 may be applied to V2X communication.

For example, (b) of FIG. 8 shows a terminal operation related to LTE transmission mode 2 or LTE transmission mode 4. Or, for example, (b) of FIG. 8 shows a terminal operation related to NR resource allocation mode 2.

Referring to (a) of FIG. 8 , in LTE transmission mode 1, LTE transmission mode 3 or NR resource allocation mode 1, the base station may schedule an SL resource to be used by the terminal for SL transmission. For example, the base station may perform resource scheduling to UE 1 through PDCCH (eg, Downlink Control Information (DCI)) or RRC signaling (eg, Configured Grant Type 1 or Configured Grant Type 2), and UE 1 is the V2X or SL communication with UE 2 may be performed according to resource scheduling. For example, UE 1 transmits SCI (Sidelink Control Information) to UE 2 through a Physical Sidelink Control Channel (PSCCH), and then transmits data based on the SCI to UE 2 through a Physical Sidelink Shared Channel (PSSCH). have.

Referring to (b) of FIG. 8, in LTE transmission mode 2, LTE transmission mode 4 or NR resource allocation mode 2, the terminal may determine the SL transmission resource within the SL resource set by the base station / network or the preset SL resource. have. For example, the configured SL resource or the preset SL resource may be a resource pool. For example, the UE may autonomously select or schedule a resource for SL transmission. For example, the terminal may perform SL communication by selecting a resource by itself within a set resource pool. For example, the terminal may select a resource by itself within the selection window by performing a sensing (sensing) and resource (re)selection procedure. For example, the sensing may be performed in units of subchannels. In addition, UE 1, which has selected a resource within the resource pool, transmits the SCI to UE 2 through the PSCCH, and may transmit data based on the SCI to UE 2 through the PSSCH.

9 illustrates three types of casts according to an embodiment of the present disclosure. The embodiment of FIG. 9 may be combined with various embodiments of the present disclosure. Specifically, FIG. 9(a) shows broadcast type SL communication, FIG. 9(b) shows unicast type SL communication, and FIG. 9(c) shows groupcast type SL communication. . In the case of unicast type SL communication, the terminal may perform one-to-one communication with another terminal. In the case of groupcast type SL communication, the terminal may perform SL communication with one or more terminals in a group to which the terminal belongs. In various embodiments of the present disclosure, SL groupcast communication may be replaced with SL multicast communication, SL one-to-many communication, or the like.

Hereinafter, SL congestion control (sidelink congestion control) will be described.

When the terminal determines the SL transmission resource by itself, the terminal also determines the size and frequency of the resource used by the terminal by itself. Of course, use of a resource size or frequency above a certain level may be restricted due to a constraint from a network or the like. However, if all the terminals use a relatively large number of resources in a situation in which many terminals are concentrated in a specific area at a specific time, overall performance may be greatly reduced due to mutual interference.

Therefore, the terminal needs to observe the channel condition. If it is determined that excessively many resources are being consumed, it is desirable for the terminal to take an action in the form of reducing its own resource use. In this specification, this may be defined as congestion control (CR). For example, the terminal determines whether the energy measured in the unit time/frequency resource is above a certain level, and determines the amount and frequency of its transmission resource according to the ratio of the unit time/frequency resource in which the energy of the predetermined level or more is observed. can be adjusted In the present specification, a ratio of time/frequency resources in which energy of a certain level or higher is observed may be defined as a channel congestion ratio (CBR). The UE may measure CBR for a channel/frequency. Additionally, the UE may transmit the measured CBR to the network/base station.

10 illustrates a resource unit for CBR measurement according to an embodiment of the present disclosure. The embodiment of FIG. 10 may be combined with various embodiments of the present disclosure.

Referring to FIG. 10 , the CBR is a result of the UE measuring a Received Signal Strength Indicator (RSSI) in units of subchannels for a specific period (eg, 100 ms). It may mean the number of channels. Alternatively, the CBR may mean a ratio of subchannels having a value greater than or equal to a preset threshold among subchannels during a specific period. For example, in the embodiment of FIG. 10 , if it is assumed that the shaded subchannels are subchannels having a value greater than or equal to a preset threshold, CBR may mean the ratio of the shaded subchannels during the 100ms period. Additionally, the terminal may report the CBR to the base station.

Furthermore, congestion control in consideration of the priority of traffic (eg, packets) may be required. To this end, for example, the terminal may measure a channel occupancy ratio (CR). Specifically, the terminal measures the CBR, and the terminal according to the CBR, the maximum value (CRlimitk) of the channel occupancy ratio (Channel occupancy Ratio k, CRk) that the traffic corresponding to each priority (eg, k) can occupy. ) can be determined. For example, the terminal may derive the maximum value (CRlimitk) of the channel occupancy for the priority of each traffic based on the CBR measurement value predetermined table. For example, in the case of traffic having a relatively high priority, the terminal may derive a maximum value of a relatively large channel occupancy. Thereafter, the terminal may perform congestion control by limiting the sum of the channel occupancy rates of traffic having a priority k of traffic lower than i to a predetermined value or less. According to this method, a stronger channel occupancy limit may be applied to traffic having a relatively low priority.

In addition, the UE performs SL congestion control by using methods such as adjusting the size of transmission power, dropping packets, determining whether to retransmit, and adjusting the size of the transmission RB (Modulation and Coding Scheme (MCS) adjustment). can

Hereinafter, a Hybrid Automatic Repeat Request (HARQ) procedure will be described.

In the case of SL unicast and groupcast, HARQ feedback and HARQ combining in the physical layer may be supported. For example, when the receiving terminal operates in

resource allocation mode

1 or 2, the receiving terminal may receive a PSSCH from the transmitting terminal, and the receiving terminal may receive Sidelink Feedback Control Information (SFCI) through a Physical Sidelink Feedback Channel (PSFCH). HARQ feedback for the PSSCH may be transmitted to the transmitting terminal using the format.

For example, SL HARQ feedback may be enabled for unicast. In this case, in non-CBG (non-Code Block Group) operation, when the receiving terminal decodes the PSCCH targeting the receiving terminal, and the receiving terminal successfully decodes the transport block related to the PSCCH, the receiving terminal HARQ-ACK may be generated. And, the receiving terminal may transmit the HARQ-ACK to the transmitting terminal. On the other hand, after the receiving terminal decodes the PSCCH targeting the receiving terminal, if the receiving terminal does not successfully decode the transport block related to the PSCCH, the receiving terminal may generate a HARQ-NACK. And, the receiving terminal may transmit the HARQ-NACK to the transmitting terminal.

For example, SL HARQ feedback may be enabled for groupcast. For example, in non-CBG operation, two HARQ feedback options may be supported for groupcast.

(1) Groupcast option 1: After the receiving terminal decodes the PSCCH targeting the receiving terminal, if the receiving terminal fails to decode the transport block related to the PSCCH, the receiving terminal transmits the HARQ-NACK through the PSFCH It can be transmitted to the transmitting terminal. On the other hand, if the receiving terminal decodes the PSCCH targeting the receiving terminal, and the receiving terminal successfully decodes the transport block related to the PSCCH, the receiving terminal may not transmit the HARQ-ACK to the transmitting terminal.

(2) groupcast option 2: If the receiving terminal fails to decode the transport block related to the PSCCH after the receiving terminal decodes the PSCCH targeting the receiving terminal, the receiving terminal transmits the HARQ-NACK through the PSFCH It can be transmitted to the transmitting terminal. And, when the receiving terminal decodes the PSCCH targeted to the receiving terminal, and the receiving terminal successfully decodes the transport block related to the PSCCH, the receiving terminal may transmit an HARQ-ACK to the transmitting terminal through the PSFCH.

For example, if groupcast option 1 is used for SL HARQ feedback, all terminals performing groupcast communication may share a PSFCH resource. For example, terminals belonging to the same group may transmit HARQ feedback using the same PSFCH resource.

For example, if groupcast option 2 is used for SL HARQ feedback, each terminal performing groupcast communication may use different PSFCH resources for HARQ feedback transmission. For example, terminals belonging to the same group may transmit HARQ feedback using different PSFCH resources.

For example, when SL HARQ feedback is enabled for groupcast, the receiving terminal transmits the HARQ feedback to the transmitting terminal based on the TX-RX (Transmission-Reception) distance and/or RSRP (Reference Signal Received Power). can decide whether

For example, in the case of TX-RX distance-based HARQ feedback in groupcast option 1, if the TX-RX distance is less than or equal to the communication range requirement, the receiving terminal may transmit the HARQ feedback for the PSSCH to the transmitting terminal. On the other hand, if the TX-RX distance is greater than the communication range requirement, the receiving terminal may not transmit the HARQ feedback for the PSSCH to the transmitting terminal. For example, the transmitting terminal may notify the receiving terminal of the location of the transmitting terminal through the SCI related to the PSSCH. For example, the SCI related to the PSSCH may be the second SCI. For example, the receiving terminal may estimate or obtain the TX-RX distance based on the location of the receiving terminal and the location of the transmitting terminal. For example, the receiving terminal can know the communication range requirement used for the PSSCH by decoding the SCI related to the PSSCH.

For example, in the case of resource allocation mode 1, the time between the PSFCH and the PSSCH may be set or preset. In the case of unicast and groupcast, if retransmission is required on the SL, this may be indicated to the base station by the terminal within coverage using the PUCCH. The transmitting terminal may transmit an indication to the serving base station of the transmitting terminal in the form of a Scheduling Request (SR)/Buffer Status Report (BSR) rather than the HARQ ACK/NACK format. In addition, even if the base station does not receive the indication, the base station can schedule the SL retransmission resource to the terminal. For example, in the case of resource allocation mode 2, the time between the PSFCH and the PSSCH may be set or preset.

For example, from the viewpoint of transmission of the UE in the carrier, TDM between PSCCH/PSSCH and PSFCH may be allowed for the PSFCH format for SL in the slot. For example, a sequence-based PSFCH format having one symbol may be supported. Here, the one symbol may not be an automatic gain control (AGC) period. For example, the sequence-based PSFCH format may be applied to unicast and groupcast.

For example, within the slot associated with the resource pool, the PSFCH resource may be periodically set to N slot duration or set in advance. For example, N may be set to one or more values of 1 or more. For example, N may be 1, 2 or 4. For example, HARQ feedback for transmission in a specific resource pool may be transmitted only through the PSFCH on the specific resource pool.

For example, when the transmitting terminal transmits the PSSCH to the receiving terminal in slots #X to #N, the receiving terminal may transmit HARQ feedback for the PSSCH to the transmitting terminal in slot #(N + A). For example, slot #(N + A) may include a PSFCH resource. Here, for example, A may be the smallest integer greater than or equal to K. For example, K may be the number of logical slots. In this case, K may be the number of slots in the resource pool. Or, for example, K may be the number of physical slots. In this case, K may be the number of slots inside and outside the resource pool.

For example, when the receiving terminal transmits HARQ feedback on a PSFCH resource in response to one PSSCH transmitted by the transmitting terminal to the receiving terminal, the receiving terminal is based on an implicit mechanism within the configured resource pool. may determine a frequency domain and/or a code domain of For example, the receiving terminal is a slot index related to PSCCH / PSSCH / PSFCH, a subchannel related to PSCCH / PSSCH, and / or an identifier for distinguishing each receiving terminal in a group for HARQ feedback based on groupcast option 2 Based on at least one, a frequency domain and/or a code domain of the PSFCH resource may be determined. And/or, for example, the receiving terminal may determine the frequency domain and/or code domain of the PSFCH resource based on at least one of SL RSRP, SINR, L1 source ID, and/or location information.

For example, when the HARQ feedback transmission through the PSFCH of the UE and the HARQ feedback reception through the PSFCH overlap, the UE either transmits the HARQ feedback through the PSFCH or receives the HARQ feedback through the PSFCH based on the priority rule. You can choose. For example, the priority rule may be based on at least a priority indication of the relevant PSCCH/PSSCH.

For example, when HARQ feedback transmission through PSFCH for a plurality of UEs overlaps, the UE may select a specific HARQ feedback transmission based on a priority rule. For example, the priority rule may be based on at least a priority indication of the relevant PSCCH/PSSCH.

Meanwhile, in the present specification, for example, a transmitting terminal (TX UE) may be a terminal transmitting data to a (target) receiving terminal (RX UE). For example, the TX UE may be a terminal performing PSCCH and/or PSSCH transmission. For example, the TX UE may be a terminal that transmits an SL CSI-RS and/or an SL CSI report request indicator to a (target) RX UE. For example, the TX UE is a (target) RX UE to be used for SL (L1) RSRP measurement (predefined) reference signal (eg, PSSCH DM-RS (demodulation reference signal)) and / or SL (L1) RSRP It may be a terminal that transmits a report request indicator. For example, the TX UE is to be used for an SL RLM (radio link monitoring) operation and/or SL RLF (radio link failure) operation of a (target) RX UE, a (control) channel (eg, PSCCH, PSSCH, etc.) and/or It may be a terminal that transmits a reference signal (eg, DM-RS, CSI-RS, etc.) on the (control) channel.

On the other hand, in the present specification, the receiving terminal (RX UE) is the decoding (decoding) success of the data received from the transmitting terminal (TX UE) and / or the detection / decoding success of the PSCCH (related to PSSCH scheduling) transmitted by the TX UE It may be a terminal that transmits SL HARQ feedback to the TX UE depending on whether or not. For example, the RX UE may be a terminal that performs SL CSI transmission to the TX UE based on the SL CSI-RS and/or the SL CSI report request indicator received from the TX UE. For example, the RX UE transmits the SL (L1) RSRP measurement value measured based on the (pre-defined) reference signal and/or the SL (L1) RSRP report request indicator received from the TX UE to the TX UE. can be For example, the RX UE may be a terminal that transmits data of the RX UE itself to the TX UE. For example, the RX UE is a terminal that performs an SL RLM operation and/or an SL RLF operation based on a (pre-set) (control) channel received from the TX UE and/or a reference signal on the (control) channel. can

Meanwhile, in the present specification, for example, the TX UE may transmit at least one of the following information to the RX UE through SCI. Here, for example, the TX UE may transmit at least one of the following information to the RX UE through a first SCI (first SCI) and/or a second SCI (second SCI).

- PSSCH (and / or PSCCH) related resource allocation information (eg, location / number of time / frequency resources, resource reservation information (eg, period))

- SL CSI report request indicator or SL (L1) RSRP (and/or SL (L1) RSRQ and/or SL (L1) RSSI) report request indicator

- (on PSSCH) SL CSI transmission indicator (or SL (L1) RSRP (and / or SL (L1) RSRQ and / or SL (L1) RSSI) information transmission indicator)

- MCS (Modulation and Coding Scheme) information

- Transmission power information

- L1 destination ID information and/or L1 source ID information

- SL HARQ process ID information

- NDI (new data indicator) information

- RV (redundancy version) information

- (transmission traffic/packet related) QoS information (eg, priority information)

- SL CSI-RS transmission indicator or (transmitted) information on the number of SL CSI-RS antenna ports

- Location information of the TX UE or (SL HARQ feedback is requested) location (or distance area) information of the target RX UE

- Reference signal (eg, DM-RS, etc.) information related to decoding and/or channel estimation of data transmitted through PSSCH. For example, the reference signal information may be information related to a pattern of a DM-RS (time-frequency) mapping resource, RANK information, antenna port index information, information on the number of antenna ports, and the like.

Meanwhile, in the present specification, for example, PSCCH may be mutually replaced/substituted with at least one ^{of SCI, first SCI (1 st-} stage SCI), and/or second SCI (2 ^{nd-stage SCI).} For example, the SCI may be replaced/substituted with at least one of the PSCCH, the first SCI, and/or the second SCI. For example, the PSSCH may be substituted/substituted with the second SCI and/or the PSCCH.

Meanwhile, in the present specification, for example, when the SCI configuration fields are divided into two groups in consideration of a (relatively) high SCI payload size, the first SCI including the first SCI configuration field group 1 may be referred to as SCI ^st, 2 may be referred to a second SCI 2 to SCI ^nd, including SCI configuration field group. For example, 1 ^st SCI and 2 ^nd SCI may be transmitted through different channels. For example, 1 ^st SCI may be transmitted to the receiving terminal through the PSCCH. For example, 2 ^nd SCI is either sent to the receiving terminal via the PSCCH (independent), and is piggybacked with the data may be sent on the PSSCH.

Meanwhile, in this specification, for example, "setting" or "definition" may mean (pre)configuration from a base station or a network. For example, "configuration" or "define" may mean resource pool specific (pre)configuration from a base station or network. For example, the base station or the network may transmit information related to "configuration" or "definition" to the terminal. For example, the base station or the network may transmit information related to "configuration" or "definition" to the terminal through predefined signaling. For example, signaling to be defined in advance may include at least one of RRC signaling, MAC signaling, PHY signaling, and/or SIB.

Meanwhile, in this specification, for example, "configuration" or "definition" may mean designated or configured through signaling previously set between terminals. For example, information related to “configuration” or “definition” may be transmitted/received through preset signaling between terminals. For example, signaling to be defined in advance may be PC5 RRC signaling.

On the other hand, in the present specification, for example, RLF may be replaced/substituted with Out-of-Synch (OOS) and/or In-Synch (IS).

Meanwhile, in the present specification, for example, a resource block (RB) may be replaced/substituted with a subcarrier. For example, a packet or traffic may be replaced/replaced with a transport block (TB) or a medium access control protocol data unit (MAC PDU) according to a transmission layer. For example, a code block group (CBG) may be substituted/substituted with a TB. For example, the source ID may be substituted/replaced with the destination ID. For example, the L1 ID may be substituted/replaced with the L2 ID. For example, the L1 ID may be an L1 source ID or an L1 destination ID. For example, the L2 ID may be an L2 source ID or an L2 destination ID.

On the other hand, in this specification, for example, the operation of the TX UE to reserve / select / determine the retransmission resource, the TX UE is based on the SL HARQ feedback information received from the RX UE whether actual use is determined (potential) ) may mean an operation of reserving/selecting/determining a retransmission resource.

Meanwhile, in the present specification, the sub-selection window may be substituted/replaced with a selection window and/or a preset number of resource sets within the selection window.

Meanwhile, in this specification, SL MODE 1 may mean a resource allocation method or a communication method in which the base station directly schedules the SL transmission resource for the TX UE through predefined signaling (eg, DCI or RRC message). . For example, SL MODE 2 may refer to a resource allocation method or communication method in which the terminal independently selects an SL transmission resource from a base station or a network or from a preset resource pool. For example, a terminal performing SL communication based on SL MODE 1 may be referred to as a MODE 1 UE or MODE 1 TX UE, and a terminal performing SL communication based on SL MODE 2 is a MODE 2 UE or MODE 2 TX It may be referred to as a UE.

Meanwhile, in the present specification, for example, a dynamic grant (DG) may be substituted/substituted with a configured grant (CG) and/or a semi-persistent scheduling grant (SPS). For example, DG may be interchanged/substituted with a combination of CG and SPS grants. For example, the CG may include at least one of CG type 1 (configured grant type 1) and/or CG type 2 (configured grant type 2). For example, in CG type 1, the grant may be provided by RRC signaling and may be stored as a configured grant. For example, in CG type 2, the grant may be provided by the PDCCH, and may be stored or deleted as a grant configured based on L1 signaling indicating activation or deactivation of the grant. For example, in CG type 1, the base station may allocate a periodic resource to the TX UE through an RRC message. For example, in CG type 2, the base station may allocate a periodic resource to the TX UE through an RRC message, and the base station may dynamically activate or deactivate the periodic resource through DCI. have.

Meanwhile, in this specification, a channel may be substituted/substituted with a signal. For example, transmission/reception of a channel may include transmission/reception of a signal. For example, transmission/reception of a signal may include transmission/reception of a channel. For example, the cast may be replaced/replaced with at least one of unicast, groupcast, and/or broadcast. For example, the cast type may be substituted/substituted with at least one of unicast, groupcast, and/or broadcast. For example, the cast or cast type may include unicast, groupcast and/or broadcast.

On the other hand, in this specification, the resource may be interchanged / replaced with a slot or symbol. For example, a resource may include a slot and/or a symbol.

Meanwhile, in the present specification, the priority is LCP (Logical Channel Prioritization), delay (latency), reliability (reliability), minimum required communication range (minimum required communication range), PPPP (Prose Per-Packet Priority), SLRB (Sidelink Radio) Bearer), QoS profile (profile), QoS parameters, and / or at least one of the requirements (requirement) and may be interchanged / replaced with each other.

Meanwhile, in the present specification, for example, for convenience of description, a (physical) channel used when the RX UE transmits at least one of the following information to the TX UE may be referred to as a PSFCH.

- SL HARQ feedback, SL CSI, SL (L1) RSRP

Meanwhile, in this specification, the Uu channel may include a UL channel and/or a DL channel. For example, the UL channel may include PUSCH, PUCCH, Sounding Reference Signal (SRS), and the like. For example, the DL channel may include PDCCH, PDSCH, PSS/SSS, and the like. For example, the SL channel may include PSCCH, PSSCH, PSFCH, PSBCH, PSSS/SSSS, and the like.

Meanwhile, in this specification, sidelink information may include at least one of a sidelink message, a sidelink packet, a sidelink service, sidelink data, sidelink control information, and/or a sidelink transport block (TB). . For example, the sidelink information may be transmitted through PSSCH and/or PSCCH.

Meanwhile, in the present specification, a high priority may mean a small priority value, and a low priority may mean a large priority value. For example, Table 5 shows an example of priorities.

서비스 또는 논리 채널service or logical channel	우선 순위 값priority value
서비스 A 또는 논리 채널 AService A or logical channel A	1One
서비스 B 또는 논리 채널 Bservice B or logical channel B	22
서비스 C 또는 논리 채널 Cservice C or logical channel C	33

Referring to Table 5, for example, service A or logical channel A related to the smallest priority value may have the highest priority. For example, service C or logical channel C associated with the highest priority value may have the lowest priority.

Various embodiments of the present disclosure may be implemented independently or may be implemented in combination with each other. For example, rule #A and rule #B may be implemented independently or may be implemented in combination with each other.

On the other hand, from the perspective of the MODE 1 TX UE, between the PSFCH reception time (including the SL HARQ-ACK information related to the MAC PDU transmitted by itself) and the UL channel (eg, PUCCH, PUSCH) transmission time including the SL HARQ-ACK information , a time gap may be required to ensure the minimum required processing time. At this time, without considering the SL service-related QoS requirements (eg, this can be commonly identified between the base station and the terminal through logical channel information mapped to the MODE 1 SL grant), etc., if the time gap is fixed to one value, eventually This value should be defined as a value to support the SL service of the tightest QoS requirements (eg, latency). Due to this, a problem in that the terminal implementation becomes excessive (regardless of the type of SL service that the terminal is actually interested in) may occur.

11 illustrates a procedure in which a UE reports SL HARQ feedback to a base station according to an embodiment of the present disclosure. The embodiment of FIG. 11 may be combined with various embodiments of the present disclosure.

Referring to FIG. 11 , in step S1110, the TX UE may receive information related to SL resources and/or information related to UL resources from the base station. For example, the SL resource may include a PSCCH resource and/or a PSSCH resource. For example, the UL resource may include a PUCCH resource and/or a PUSCH resource.

For example, in the case of DG, the base station may transmit DCI including information related to SL resources and information related to UL resources to the TX UE. For example, in the case of CG type 1, the base station may transmit an RRC message (eg, SL-ConfiguredGrantConfig) including information related to SL resources and information related to UL resources to the TX UE. For example, in the case of CG type 2, the base station may transmit an RRC message (eg, SL-ConfiguredGrantConfig) including information related to the SL resource to the TX UE, and the base station then activates or deactivates the SL resource through DCI. can do. Additionally, for example, in the case of CG type 2, the DCI may include information related to UL resources.

In step S1120, the TX UE may transmit a PSCCH to the RX UE. For example, the TX UE may transmit the first SCI to the RX UE through the PSCCH.

In step S1130, the TX UE may transmit the PSSCH related to the PSCCH to the RX UE. For example, the TX UE may transmit the second SCI and/or data (eg, MAC PDU, TB) to the RX UE through the PSSCH related to the PSCCH.

In step S1140, the TX UE and/or the RX UE may determine a PSFCH resource. For example, the TX UE and/or the RX UE may determine the PSFCH resource related to the PSSCH resource based on the slot index of the PSSCH resource and the subchannel index of the PSSCH resource. For example, the TX UE and/or the RX UE may determine the PSFCH resource related to the PSSCH resource based on the slot index of the PSSCH resource, the subchannel index of the PSSCH resource, and the source ID of the TX UE. For example, the TX UE and/or the RX UE may determine the PSFCH resource related to the PSSCH resource based on the slot index of the PSSCH resource, the subchannel index of the PSSCH resource, the source ID of the TX UE, and the member ID of the RX UE. .

In step S1150, the TX UE may monitor the PSFCH from the RX UE on the PSFCH resource. For example, the TX UE may monitor the SL HARQ feedback from the RX UE based on the PSFCH resource.

In step S1160, the TX UE may transmit a PUCCH and/or a PUSCH to the base station. For example, the TX UE may transmit SL HARQ feedback to the base station based on the PUCCH resource and/or the PUSCH resource. For convenience of description, a PUCCH resource and/or a PUSCH resource may be referred to as a UL resource. For example, when the TX UE receives a NACK from the RX UE through the PSFCH, the TX UE may report the NACK to the base station based on the UL resource. In this case, the base station may allocate additional retransmission resources to the TX UE. For example, when the TX UE receives the ACK from the RX UE through the PSFCH, the TX UE may report the ACK to the base station based on the UL resource. In this case, the base station may not allocate additional retransmission resources to the TX UE. For example, when the TX UE fails to monitor the PSFCH on the PSFCH resource, the TX UE may report a NACK to the base station based on the UL resource. In this case, the base station may allocate additional retransmission resources to the TX UE.

For example, it is necessary to ensure a minimum time gap between the PSFCH resource and the UL resource. In this specification, the minimum time gap may be referred _{to as MIN_TGAP or T prep.} Hereinafter, in various embodiments of the present disclosure, a minimum time gap between the PSFCH resource and the UL resource will be described in detail.

According to an embodiment of the present disclosure, according to the rules described in Table 6, the MIN_TGAP value may be set/defined for the terminal. For example, the MIN_TGAP value may be a _{T prep value.}

For example, the MIN_TGAP value may be the minimum time interval/offset between the time when the terminal finishes receiving the PSFCH and the start time of the PUCCH. For example, the MIN_TGAP value may be a minimum time interval/offset between a point in time when the UE finishes receiving a PSFCH and a start time of a PUSCH at which a PUCCH related to the PSFCH is piggybacked. For example, the MIN_TGAP value may be the minimum time interval/offset between the time when the UE finishes receiving the PSFCH and the start time of the PUCCH that is piggybacked on the PUSCH. For example, the start time of the PUCCH piggybacked to the PUSCH may be the start time of the most preceding PUCCH in the time domain piggybacked to the PUSCH. For example, the PSFCH may be a PSFCH received by the UE on the last PSFCH slot associated with the PUCCH. For example, the start time of the PUCCH may be a time when the terminal starts transmission of the PUCCH. For example, the start time of the PUSCH may be a time at which the UE starts transmitting the PUSCH. For example, the PUCCH may include SL HARQ feedback information. For example, the PUCCH may include SL HARQ feedback information related to the PSFCH.

12 illustrates a mapping method between a PSSCH resource and a PSFCH resource and a mapping between a PSFCH resource and a UL resource according to an embodiment of the present disclosure. The embodiment of FIG. 12 may be combined with various embodiments of the present disclosure.

Referring to FIG. 12 , the minimum time gap may be a time interval or time offset between the last PSFCH resource and the UL resource among a plurality of PSFCH resources related to the UL resource.

Table 6 shows how the terminal acquires/determines the minimum time gap (eg, T _{prep ).}

Here, for example, the MIN_TGAP value is at least one of a time (eg, minimum time) required for PSFCH detection/information derivation (eg, minimum time) and/or time required for PUCCH information configuration/processing (eg, minimum time) may include For example, according to the (some) proposed rules below, the value of X (in Table 6) may be set. For example, the value of X may be a value in milliseconds. For example, the value of X may be a value in microseconds. For example, the X value may be a value of a symbol length unit based on subcarrier spacing related to SL. For example, the value of X may be a value of a symbol length unit based on subcarrier spacing related to UL. For example, the value of X may be a value of a symbol length unit based on the smallest subcarrier spacing among UL-related subcarrier spacing and SL-related subcarrier spacing.

For example, the value of X may be changed according to the number of PSFCHs that the UE needs to receive/process (at the same time) in order to configure/transmit PUCCH information. For example, in order for the UE to configure/transmit PUCCH information, the value of X may be changed according to the number of PSFCHs to be received/processed (simultaneously) on the last PSFCH slot associated with the PUCCH. Here, the number of PSFCHs may be the maximum number of PSFCHs, the minimum number of PSFCHs, or the average number of PSFCHs.

For example, the value of X may be changed according to the number of PSFCHs to be received/processed (at the same time) in order for the UE to piggyback the PUCCH (related to the PSFCH) on the PUSCH and process/transmit it. For example, in order for the UE to piggyback and process/transmit PUCCH (related to PSFCH) on PUSCH, on the last PSFCH slot associated with PUCCH (simultaneously) according to the number of PSFCHs to be received/processed, the X value is changed can be Here, the number of PSFCHs may be the maximum number of PSFCHs, the minimum number of PSFCHs, or the average number of PSFCHs.

For example, parameters (eg, MIN_TGAP, X, (reflecting/including X (described in this disclosure) N) related to (some) proposed methods/rules of the present disclosure and/or whether the parameters are applied or not depends on the service priority It may be set/limited for the terminal differently or independently for each priority or service priority. For example, the parameter and/or whether the parameter is applied may be set/limited for the terminal in a service type-specific manner or differently or independently for each service type. For example, the parameter and/or whether the parameter is applied may be set/limited for the terminal differently or independently for each (service) QoS requirement specifically or for each (service) QoS requirement. For example, QoS requirements may include latency and/or reliability.

For example, the parameter and/or whether the parameter is applied may be set/limited for the terminal differently or independently for each (resource pool) congestion level specifically or for each (resource pool) congestion level. For example, the congestion level may include CBR. For example, the parameter and/or whether the parameter is applied may be set/limited for the UE in a resource pool-specific manner or differently or independently for each resource pool.

For example, the parameter and/or whether the parameter is applied or not may be set/limited for the terminal in a specific cast type or differently or independently for each cast type. For example, the cast type may include unicast, groupcast, or broadcast.

For example, the parameter and/or whether the parameter is applied or not may be set/limited for the UE in a specific HARQ feedback scheme or differently or independently for each HARQ feedback scheme. For example, the HARQ feedback scheme may include an ACK/NACK feedback scheme or a NACK ONLY feedback scheme.

For example, the parameter and/or whether the parameter is applied or not may be set/limited for the terminal in a specific SL operation mode or differently or independently for each SL operation mode. For example, the SL mode of operation may include mode 1 or mode 2.

For example, the parameter and/or whether the parameter is applied may be set/limited for the UE in a specific MAC PDU or differently or independently for each MAC PDU. For example, the MAC PDU may include a HARQ FEEDBACK ENABLED MAC PDU or a HARQ FEEDBACK DISABLED MAC PDU. For example, the HARQ FEEDBACK ENABLED MAC PDU may be a MAC PDU composed of a packet related to a logical channel for which HARQ feedback is required. For example, the HARQ FEEDBACK DISABLED MAC PDU may be a packet related to a logical channel for which HARQ feedback is not required. It may be a configured MAC PDU.

For example, the parameter and/or whether the parameter is applied may be set/limited for the UE in a TB-specific manner or differently or independently for each TB. For example, the TB may include a TB for which HARQ feedback is required or a TB for which HARQ feedback is not required.

For example, the parameter and/or whether the parameter is applied (operated by the terminal (or operable)) (maximum or minimum or average) the number of SL sessions specifically or (operable (or operable) by the terminal) ) (maximum or minimum or average) may be set/limited for the terminal differently or independently for each number of SL sessions.

For example, whether the parameter and/or the parameter is applied may be determined by the simultaneous reception/processing (or transmission) possible maximum (or minimum or average) number of PSFCHs (eg, UE CAPABILITY) of the terminal or simultaneous reception/processing of the terminal The maximum (or minimum or average) PSFCH number (eg, UE CAPABILITY) that can be processed (or transmitted) may be set/limited differently or independently for the UE.

For example, the parameter and/or whether the parameter is applied may be set/limited for the terminal differently or independently for each PSFCH resource period-specific (resource pool-related) or (resource pool-related) PSFCH resource period. .

For example, whether the parameter and/or the parameter is applied is the number of bits/information amount of the SL HARQ feedback transmitted through (specific) PUCCH or the number of bits/ It may be set/limited for the terminal differently or independently for each amount of information. For example, the number of bits/information amount of SL HARQ feedback may include the maximum number of bits/information amount of SL HARQ feedback, minimum number of bits/information amount of SL HARQ feedback, or average number of bits/information amount of SL HARQ feedback.

For example, the parameter and/or whether the parameter is applied is determined by a (specific) PUCCH-linked (last) PSFCH slot (relevant (feedback bundling) PSSCH slot) (maximum or minimum or average) number of specific or (specific) ) PUCCH-linked (last) PSFCH slots (related (feedback bundling) PSSCH slots) (maximum or minimum or average) may be set/limited differently or independently for each terminal.

For example, the parameter and/or whether the parameter is applied is determined by the number of (maximum or minimum or average) PSFCHs required for (simultaneous) reception (on the last PSFCH slot associated with PUCCH) for PUCCH information configuration. For PUCCH information configuration (on the last PSFCH slot interlocked with PUCCH), (simultaneous) reception is required (maximum or minimum or average) for each number of PSFCHs that are required to be configured/limited differently or independently for the UE.

For example, the parameter and/or whether the parameter is applied or not depends on the value of the COUNTER SIDELINK ASSIGNMENT INDEX field (on DG DCI) specifically or the value of the COUNTER SIDELINK ASSIGNMENT INDEX field (on DG DCI) differently or independently for the terminal It can be set/limited.

For example, whether the parameter and / or the application of the parameter is (in the resource pool) (on the last PSFCH slot associated with the PUCCH) SL slot related (maximum or minimum or average) symbol number / position-specific or (resource In the pool) (on the last PSFCH slot interlocked with the PUCCH) SL slot-related (maximum or minimum or average) symbol number/position may be set/limited differently or independently for the UE.

For example, the parameter and/or whether the parameter is applied is determined (in the resource pool) (on the last PSFCH slot associated with the PUCCH) PSSCH-related (maximum or minimum or average) symbol number/position-specific or (resource pool) My) (on the last PSFCH slot interlocked with PUCCH) PSSCH-related (maximum or minimum or average) symbol number/position may be set/limited differently or independently for the UE.

For example, the parameter and/or whether the parameter is applied is determined by the number/position of PSFCH symbols in the SL slot (on the last PSFCH slot associated with PUCCH) or in the SL slot (on the last PSFCH slot associated with PUCCH) It may be configured/limited for the UE differently or independently for each PSFCH symbol number/position.

For example, the parameter and/or whether the parameter is applied is determined by (resource pool related) (preset) PSSCH DMRS time domain pattern specifically or (resource pool related) (preset) PSSCH DMRS time domain pattern It may be set/limited for the terminal differently or independently.

For example, whether the parameter and / or the application of the parameter is (selectable) PSSCH (time domain) DMRS (pattern) the maximum (or minimum or average) number of symbols Specifically or (selectable) PSSCH (time domain) ) DMRS (pattern) may be set/limited for the terminal differently or independently for each maximum (or minimum or average) number of symbols.

For example, whether the parameter and / or the application of the parameter is (selectable) PSSCH (time domain) DMRS (pattern) symbol position / index of the rearmost DMRS symbol in the SL slot specifically or (selectable) Among PSSCH (time domain) DMRS (pattern) symbols, the position/index of the rearmost DMRS symbol in the SL slot may be set/limited differently or independently for the UE.

For example, whether the parameter and/or the parameter is applied is determined whether (in the resource pool) SL CSI-RS (and/or PT-RS) is configured specifically or (in the resource pool) the SL CSI-RS (and/or Or PT-RS) may be configured/limited for the UE differently or independently for each configuration.

For example, the parameter and/or whether the parameter is applied may be set/limited for the terminal differently or independently for each synchronization error between Uu communication and SL communication specifically or for each synchronization error between Uu communication and SL communication. . For example, the synchronization error between Uu communication and SL communication may include a subframe boundary difference, a slot boundary difference, a symbol boundary difference, or a (start point) difference between SFN 0 and DFN 0. have.

For example, whether the parameter and/or whether the parameter is applied is determined whether the synchronization error between the Uu communication and the SL communication exceeds a preset (allowable) threshold or specifically or whether the synchronization error between the Uu communication and the SL communication is preset (Allow) It may be set/limited for the terminal differently or independently according to whether the threshold is exceeded.

For example, the parameter and/or whether the parameter is applied may be set/limited for the UE differently or independently for each PUCCH-related HARQ codebook type or for each PUCCH-related HARQ codebook type. For example, the PUCCH-related HARQ codebook type may include a SEMI-STATIC codebook or a DYNAMIC codebook.

For example, the parameter and/or whether the parameter is applied is specific to the number of PUSCH symbols to which PUCCH is piggybacked (PSFCH-related) or (PSFCH-related) Differently or independently according to the number of PUSCH symbols to which PUCCH is piggybacked can be set/limited for the terminal.

For example, the parameter and/or whether the parameter is applied may be set/limited for the terminal differently or independently for each number/position-specifically the number/position of DMRS symbols on the PUSCH or the number/position of the DMRS symbols on the PUSCH. .

For example, the parameter and/or whether the parameter is applied may be set/limited for the terminal in a specific manner or differently or independently for each grant. For example, the grant may include mode 1 DG or CG.

For example, the parameter and/or whether the parameter is applied may be set/limited for the terminal differently or independently for each (PSFCH) SL neuronology or (PSFCH) SL neuronology. For example, the numerology may include subcarrier spacing, CP length, or CP type.

For example, the parameter and/or whether the parameter is applied may be set/limited for the terminal differently or independently for each (PUCCH) UL neuronology or (PUCCH) UL neuronology.

For example, whether the parameter and/or the parameter is applied is a minimum value between UL neuronology and SL neuronology, or a minimum value between UL neuronology and SL neuronology. Differently or independently for each terminal. can

For example, whether the parameter and/or the parameter is applied may be set/limited for the terminal differently or independently for each combination specific between UL neuronology and SL neurology or for each combination between UL neurology and SL neurology. can

For example, in the present disclosure, the wording “X” may be interpreted (extended) by being replaced with _{“N” or “T prep ”.}

1. Rule #A

For example, the base station / network to the terminal, the X value (and / or (reflecting / including the X value (described in the present disclosure)) N value and / or (T _prep value) below (part of) It can be transmitted/set/limited for each parameter and/or specifically differently or independently. For example, the base station / network via RRC, SIB, PRECONFIGURATION, and / or (DG and / or CG ACTIVATION) DCI (a predefined field on the), X value (and / or (as described in this disclosure) It is possible to transmit the N value (reflecting/including the X value) and/or the T _prep value (in Table 6) to the UE. For example, the X value (and/or the N value (reflecting/including the X value (described in the present disclosure)) and/or the T _prep value (in Table 6) may be fixed for each of the following (some) parameters. For example, the parameter may include at least one of the parameters listed below.

- Service priority

- type of service

- (service) QOS requirements (eg delay, reliability)

- (resource pool) congestion level (eg CBR)

- resource pool

- Cast type (eg unicast, groupcast, broadcast)

- HARQ feedback method (eg, ACK/NACK feedback, NACK ONLY feedback)

- SL operation mode (eg, MODE 1, MODE 2)

- HARQ FEEDBACK ENABLED MAC PDU or HARQ FEEDBACK DISABLED MAC PDU

- HARQ FEEDBACK ENABLED TB or HARQ FEEDBACK DISABLED TB

- (The number of (maximum or minimum or average) SL sessions operated by the terminal (or available))

- Number of bits/information amount of (maximum or minimum or average) SL HARQ feedback transmitted through (specific) PUCCH

- Number of (last) PSFCH slots (related (feedback bundling) PSSCH slots) (maximum or minimum or average) associated with (specific) PUCCH

- The number of (maximum or minimum or average) PSFCHs required for the UE to receive (at the same time) (on the last PSFCH SLOT interlocked with PUCCH) to configure PUCCH information

- PUCCH related HARQ codebook type (eg, SEMI-STATIC codebook, DYNAMIC codebook)

- (Related resource pool) PSFCH resource cycle

- (PSFCH related) The number of PUSCH symbols to which PUCCH is piggybacked

- Number/position of DMRS symbols on PUSCH

- MODE 1 DG (dynamic grant)

- MODE 1 CG (configured grant)

- The maximum (or minimum or average) number of PSFCHs that the terminal can simultaneously receive / process (eg, UE CAPABILITY)

- The maximum (or minimum or average) number of PSFCHs that the terminal can transmit simultaneously (eg, UE CAPABILITY)

- (in the resource pool) (maximum or minimum or average) number of SL slot related symbols (on the last PSFCH slot associated with PUCCH)

- (in the resource pool) (maximum or minimum or average) position of SL slot related symbols (on the last PSFCH slot associated with PUCCH)

- (in the resource pool) (maximum or minimum or average) number of PSSCH-related symbols (on the last PSFCH slot associated with PUCCH)

- (In the resource pool) (maximum or minimum or average) position of PSSCH-related symbols (on the last PSFCH slot associated with PUCCH)

- The number of PSFCH symbols in the SL slot (on the last PSFCH slot associated with the PUCCH)

- Position of the PSFCH symbol in the SL slot (on the last PSFCH slot associated with the PUCCH)

- (relevant to resource pool) (pre-set) PSSCH DMRS time domain pattern (time domain pattern)

- Maximum (or minimum or average) number of (selectable) PSSCH (time domain) DMRS (pattern) symbols

- (selectable) PSSCH (time domain) DMRS (pattern) symbol position / index of the rearmost DMRS symbol in the SL slot

- Whether SL CSI-RS is set (in the resource pool)

- Whether PT-RS is set (in the resource pool)

- Synchronization error between Uu communication and SL communication (eg, subframe boundary difference, slot boundary difference, symbol boundary difference, (start point) difference between SFN 0 and DFN 0

- Whether the synchronization error between Uu communication and SL communication exceeds a preset (allowable) threshold value)

- (PSFCH) SL Numonology

- (PUCCH) UL Numanology

- Minimum value between SL pneumonology and UL pneumonology

- Combination of SL pneumonology and UL pneumology))

For example, when the priority of a service/packet is relatively low (than a preset threshold level), the value of X may be set (relatively) large for the terminal. For example, when the reliability requirement of a service/packet is relatively low (than a preset threshold level), the value of X may be set (relatively) large for the terminal. For example, when the service/packet related delay requirement is relatively long (than a preset threshold value), the value of X may be set (relatively) large for the terminal. For example, when the (SL) ACK/NACK feedback scheme (relative to the (SL) NACK ONLY feedback scheme) is applied to the UE, the value of X may be set to be large (relatively) for the UE. For example, in the case of groupcast (compared to unicast), the value of X may be set to be large (relatively) for the terminal. For example, when the resource pool congestion level is lower (than a preset threshold), the value of X may be set to be (relatively) large for the terminal. For example, when the UE transmits a HARQ FEEDBACK DISABLED MAC PDU/TB (compared to HARQ FEEDBACK ENABLED MAC PDU/TB), the value of X may be set to be large (relatively) for the UE.

For example, when the priority of a service/packet is relatively low (than a preset threshold level), the value of X may be set to a small (relatively) small value for the terminal. For example, when the reliability requirement of a service/packet is relatively low (than a preset threshold level), the value of X may be set to a small (relatively) small value for the terminal. For example, when a service/packet related delay requirement is relatively long (than a preset threshold value), the value of X may be set to a small (relatively) small value for the terminal. For example, when the (SL) ACK/NACK feedback method (relative to the (SL) NACK ONLY feedback method) is applied to the UE, the value of X may be set to a small (relatively) small value for the UE. For example, in the case of groupcast (compared to unicast), the value of X may be set to be small (relatively) for the terminal. For example, when the resource pool congestion level is lower (than a preset threshold), the X value may be set to a (relatively) small (relatively) small value for the terminal. For example, when the terminal transmits a HARQ FEEDBACK DISABLED MAC PDU/TB (compared to HARQ FEEDBACK ENABLED MAC PDU/TB), the value of X may be set to a small (relatively) small value for the terminal.

For example, when the priority of the service/packet is relatively low (than a preset threshold level), the terminal may set/determine the value of X (relatively) large. For example, when the reliability requirement of the service/packet is relatively low (than a preset threshold level), the terminal may set/determine the X value (relatively) large. For example, when the service/packet related delay requirement is relatively long (than a preset threshold value), the UE may set/determine the X value (relatively) large. For example, when the (SL) ACK/NACK feedback scheme is applied to the UE (compared to the (SL) NACK ONLY feedback scheme), the UE may set/determine the X value (relatively) largely. For example, in the case of groupcast (compared to unicast), the UE may set/determine the value of X (relatively) large. For example, when the resource pool congestion level is lower (than a preset threshold), the UE may set/determine the X value (relatively) large. For example, when the UE transmits a HARQ FEEDBACK DISABLED MAC PDU/TB (compared to HARQ FEEDBACK ENABLED MAC PDU/TB), the UE may set/determine a (relatively) large X value.

For example, when the priority of a service/packet is relatively low (than a preset threshold level), the terminal may set/determine the value of X to be (relatively) small. For example, when the reliability requirement of a service/packet is relatively low (than a preset threshold level), the terminal may set/determine the value of X to be (relatively) small. For example, when the service/packet related delay requirement is relatively long (than a preset threshold value), the terminal may set/determine the value of X to be (relatively) small. For example, when the (SL) ACK/NACK feedback method is applied to the terminal (compared to the (SL) NACK ONLY feedback method), the terminal may set/determine the X value (relatively) small. For example, in the case of groupcast (compared to unicast), the UE may set/determine the value of X to be (relatively) small. For example, when the resource pool congestion level is lower (than a preset threshold), the UE may set/determine the value of X to be (relatively) small. For example, when the UE transmits a HARQ FEEDBACK DISABLED MAC PDU/TB (compared to HARQ FEEDBACK ENABLED MAC PDU/TB), the UE may set/determine a (relatively) small X value.

For example, the X value may be set differently or independently for each terminal for each COUNTER SIDELINK ASSIGNMENT INDEX (hereinafter, CSAI) field value on the DG DCI. For example, the CSAI field value may indicate how many (new) TB transmissions the base station has scheduled (with DG DCI) on the (last) PSFCH slot related (feedback bundling) PSSCH slot associated with the PUCCH.

For example, when the value of the CSAI field is relatively large, the value of X may be set to be (relatively) large. For example, when the base station schedules (by DG DCI) a relatively large number of (new) TB transmissions on the (last) PSFCH slot-related (feedback bundling) PSSCH slot associated with PUCCH, the value of X is (relatively) It can be largely set for the terminal. For example, a situation in which the CSAI field value is relatively large may include a situation in which the number of bits/information amount of the SL HARQ feedback transmitted through the PUCCH increases. For example, a situation in which the value of the CSAI field is relatively large may include a situation in which the number of PSFCHs that the UE needs to receive (at the same time) increases (on the last PSFCH slot associated with the PUCCH) for configuring PUCCH information.

For example, when the value of the CSAI field is relatively large, the value of X may be set to be (relatively) small. For example, when the base station schedules (by DG DCI) a relatively large number of (new) TB transmissions on the (last) PSFCH slot-related (feedback bundling) PSSCH slot associated with the PUCCH, the value of X is (relatively) It can be set small for the terminal.

For example, when the value of the CSAI field is relatively large, the UE may set/determine the value of X to be (relatively) large. For example, when the base station schedules (by DG DCI) a relatively large number of (new) TB transmissions on the (last) PSFCH slot-related (feedback bundling) PSSCH slot associated with PUCCH, the terminal is (relatively) large X value can be set/determined.

For example, when the value of the CSAI field is relatively large, the UE may set/determine the value of X to be (relatively) small. For example, when the base station schedules (by DG DCI) a relatively large number of (new) TB transmissions on the (last) PSFCH slot-related (feedback bundling) PSSCH slot associated with the PUCCH, the terminal is (relatively) small X value can be set/determined.

For example, when the number of bits/information amount of the (maximum) SL HARQ feedback transmitted through (one) PUCCH is relatively increased, the value of X may be set (relatively) large for the terminal. For example, if the (last) PSFCH slot (related (feedback bundling) PSSCH slot) (maximum) number associated with (one) PUCCH increases relatively, the X value is (relatively) large to be set for the terminal can For example, when the number of (maximum) PSFCHs required for (simultaneous) reception (on the last PSFCH slot interlocked with PUCCH) for PUCCH information configuration increases relatively, the X value is (relatively) large set for the terminal can be For example, when the SEMI-STATIC HARQ codebook is set (compared to the DYNAMIC HARQ codebook), the X value may be set to be large (relatively) for the terminal. For example, when the PSFCH resource period (in the resource pool) is set to be relatively long, the value of X may be set to be (relatively) large for the terminal. For example, in the case of CG (compared to MODE 1 DG), the value of X may be set to be large (relatively) for the terminal.

For example, when the number of bits/information amount of the (maximum) SL HARQ feedback transmitted through (one) PUCCH is relatively increased, the value of X may be set to be (relatively) small for the terminal. For example, if the (last) PSFCH slot (related (feedback bundling) PSSCH slot) (maximum) number associated with (one) PUCCH increases relatively, the X value is (relatively) small to be set for the terminal can For example, when the number of (maximum) PSFCHs required for (simultaneous) reception (on the last PSFCH slot interlocked with PUCCH) for PUCCH information configuration increases relatively, the X value is (relatively) small set for the terminal can be For example, when the SEMI-STATIC HARQ codebook is configured (compared to the DYNAMIC HARQ codebook), the value of X may be (relatively) small and set for the terminal. For example, when the PSFCH resource period (in the resource pool) is set to be relatively long, the value of X may be set to be (relatively) small for the terminal. For example, in the case of CG (compared to MODE 1 DG), the value of X may be set to be small (relatively) for the terminal.

For example, when the number of bits/information amount of the (maximum) SL HARQ feedback transmitted through (one) PUCCH is relatively increased, the UE may set/determine the X value (relatively) largely. For example, when the (last) PSFCH slot (related (feedback bundling) PSSCH slot) (maximum) number associated with (one) PUCCH is relatively increased, the terminal (relatively) largely sets/determines the X value. can For example, if the number of (maximum) PSFCHs required for (simultaneous) reception (on the last PSFCH slot interlocked with PUCCH) for configuring PUCCH information is relatively increased, the terminal (relatively) sets a large X value / can decide For example, when the SEMI-STATIC HARQ codebook is set (compared to the DYNAMIC HARQ codebook), the UE may set/determine the X value (relatively) largely. For example, when the PSFCH resource period (in the resource pool) is set to be relatively long, the UE may set/determine the value of X to be (relatively) large. For example, in the case of CG (compared to MODE 1 DG), the UE may set/determine the X value (relatively) large.

For example, when the number of bits/information amount of the (maximum) SL HARQ feedback transmitted through (one) PUCCH is relatively increased, the UE may set/determine the value of X to be (relatively) small. For example, when the (last) PSFCH slot (related (feedback bundling) PSSCH slot) (maximum) number associated with (one) PUCCH increases relatively, the terminal sets / determines the X value (relatively) small can For example, when the number of (maximum) PSFCHs required for (simultaneous) reception (on the last PSFCH slot interlocked with PUCCH) for PUCCH information configuration is relatively increased, the UE sets a (relatively) small X value / can decide For example, when the SEMI-STATIC HARQ codebook is configured (compared to the DYNAMIC HARQ codebook), the UE may set/determine the X value (relatively) small. For example, when the PSFCH resource period (in the resource pool) is set to be relatively long, the UE may set/determine the value of X to be (relatively) small. For example, in the case of CG (compared to MODE 1 DG), the UE may set/determine a small (relatively) X value.

For example, in the case of a terminal having a relatively small number of PSFCH (simultaneous) reception/processing (maximum), the value of X may be set to be (relatively) large for the terminal. For example, when the synchronization error between the Uu communication and the SL communication is relatively large (than a preset (allowed) threshold value), the X value may be set (relatively) large for the terminal.

For example, in the case of a terminal having a relatively small number of PSFCH (simultaneous) reception/processing (maximum) numbers, the value of X may be set for the terminal to be (relatively) small. For example, when the synchronization error between the Uu communication and the SL communication is relatively large (than a preset (allowed) threshold value), the X value may be set to a small (relatively) small value for the terminal.

For example, in the case of a terminal having a relatively small number of PSFCH (simultaneous) reception/processing (maximum), the terminal may set/determine a (relatively) large X value. For example, when the synchronization error between the Uu communication and the SL communication is relatively large (than a preset (allowed) threshold value), the terminal may set/determine the X value (relatively) large.

For example, in the case of a terminal having a relatively small number of PSFCH (simultaneous) reception/processing (maximum) numbers, the terminal may set/determine the value of X to be (relatively) small. For example, when the synchronization error between the Uu communication and the SL communication is relatively large (than a preset (allowed) threshold value), the terminal may set/determine the X value to be (relatively) small.

2. Rule #B

For example, the terminal may be configured to report information related to a specific value preferred by the terminal to the base station through preset (UL) signaling (eg, PUCCH, PUSCH). For example, the terminal may transmit information related to a specific value preferred by the terminal to the base station through preset (UL) signaling (eg, PUCCH, PUSCH). For example, the terminal may be configured to report information related to a specific value preferred by the terminal to the base station through a preset information format (eg, MAC CE, UCI). For example, the terminal may transmit information related to a specific value preferred by the terminal to the base station through a preset information format (eg, MAC CE, UCI). Here, for example, the information related to the specific value includes at least one of an X value, an N value (reflecting/including an X value (described in the present disclosure)), and/or a T _{prep value (in Table 6 above).} may include

Here, for example, a specific value reported by the UE to the base station may be configured/specified for each (PSFCH-related) SL numerology (eg, subcarrier spacing, CP length, CP type). For example, a specific value reported by the UE to the base station may be configured/designated for each UL neurology (PUCCH-related). For example, a specific value reported by the UE to the base station may be configured/designated for each minimum value between SL neurology and UL neurology. For example, a specific value reported by the UE to the base station may be configured/designated for each combination of SL neuronology and UL neurology. For example, a specific value reported by the terminal to the base station may be configured/specified for each parameter described in [Rule #A]. For example, a specific value reported by the UE to the base station may be configured/specified for each combination of parameters described in [Rule #A].

According to an embodiment of the present disclosure, due to an error between the synchronization/timing related to the base station (communication) and the synchronization/timing related to the SL (communication), the MIN_TGAP (eg, T _prep ) related to the PUCCH transmission of the terminal may not be guaranteed. . For example, when the difference between the synchronization/timing related to the base station (communication) and the synchronization/timing related to the SL (communication) is greater than a preset threshold, the MIN_TGAP (eg, T _prep ) related to the PUCCH transmission of the terminal is guaranteed may not be In this case, the following (some) rules may apply.

For example, the UE may be configured not to perform PSFCH reception linked to SL HARQ information transmitted through PUCCH. For example, the UE may not perform PSFCH reception linked to SL HARQ information transmitted through PUCCH. For example, the UE may be configured not to perform PUCCH transmission related to PSFCH. For example, the UE may not perform PUCCH transmission related to the PSFCH.

For example, based on the time interval/offset (hereinafter, ACT_TGAP) between the end time of the actually allowed/usable PSFCH reception and the start time of the PUCCH (transmission), the UE may transmit the PUCCH (maximum) number of times (hereinafter, ACT_PFNUM) may be configured to perform only the PSFCH reception operation, or the terminal may be configured to perform only a preset number of PSFCH reception operations (for such a case), or the terminal may perform PUCCH transmission It may be set to generate/process only the (maximum) number of SL HARQ bits (hereinafter, ACT_HQBIT). For example, ACT_TGAP may be a value smaller than MIN_TGAP. For example, ACT_TGAP may be less than or equal to MIN_TGAP. For example, ACT_PFNUM may be a value smaller than the UE CAPABILITY value (reported to the base station). For example, ACT_PFNUM may be less than or equal to the UE CAPABILITY value (reported to the base station).

For example, when the UE selects ACT_PFNUM PSFCHs and/or ACT_HQBIT HARQ-bit related PSFCHs, the UE may be configured to preferentially select a PSFCH related to a service of relatively high priority. For example, when the terminal selects ACT_PFNUM PSFCH and/or ACT_HQBIT HARQ bit related PSFCH, the terminal selects a service related PSFCH with relatively tight QoS requirements (eg, (high) reliability, (low) delay) It may be set to preferentially select. For example, when the UE selects ACT_PFNUM PSFCHs and/or ACT_HQBIT HARQ bit related PSFCHs, the UE may be configured to preferentially select a PSFCH including NACK information. For example, when the UE selects ACT_PFNUM PSFCHs and/or ACT_HQBIT HARQ-bit related PSFCHs, the UE may be configured to preferentially select a PSFCH including ACK information. For example, when the UE selects ACT_PFNUM PSFCHs and/or ACT_HQBIT HARQ bit related PSFCHs, the UE may be configured to preferentially select a PSFCH related to HARQ information of a NACK ONLY feedback scheme. For example, when the UE selects ACT_PFNUM PSFCHs and/or ACT_HQBIT HARQ bit related PSFCHs, the UE may be configured to preferentially select a PSFCH related to HARQ information of an ACK/NACK feedback scheme. For example, when the UE selects ACT_PFNUM PSFCHs and/or ACT_HQBIT HARQ bit related PSFCHs, the UE may be configured to preferentially select unicast related PSFCHs. For example, when the UE selects ACT_PFNUM PSFCHs and/or ACT_HQBIT HARQ bit related PSFCHs, the UE may be configured to preferentially select a groupcast related PSFCH.

For example, the UE may be configured to transmit only the number of TBs of ACT_TBNUM. For example, the UE may be configured to transmit only the number of TBs of ACT_TBNUM on a PSSCH slot associated with a PSFCH slot related to PUCCH. For example, the number of ACT_TBNUM may be the number in which ACT_TGAP-based PUCCH transmission can be performed. For example, the number of ACT_TBNUM may be a number that can satisfy ACT_PFNUM. For example, the number of ACT_TBNUM may be a number that can satisfy ACT_HQBIT.

For example, when the UE selects ACT_TBNUM TBs, the UE may be configured to preferentially select TBs related to services of relatively high priority. For example, when the UE selects ACT_TBNUM TBs, the UE may be configured to preferentially select a TB related to a service having relatively tight QoS requirements (eg, (high) reliability, (low) delay). For example, when the UE selects ACT_TBNUM TBs, the UE may be configured to preferentially select TBs related to NACK information. For example, when the UE selects ACT_TBNUM TBs, the UE may be configured to preferentially select TBs related to ACK information. For example, when the UE selects ACT_TBNUM TBs, the UE may be configured to preferentially select TBs related to HARQ information of the NACK ONLY feedback method. For example, when the UE selects ACT_TBNUM TBs, the UE may be configured to preferentially select TBs related to HARQ information of the ACK/NACK feedback method. For example, when the UE selects ACT_TBNUM TBs, the UE may be configured to preferentially select TBs related to unicast. For example, when the UE selects ACT_TBNUM TBs, the UE may be configured to preferentially select TBs related to groupcast.

For example, parameters (eg, ACT_TGAP, ACT_PFNUM, ACT_HQBIT, ACT_TBNUM, etc.) and/or application of the parameters related to the (some) proposed method/rule of the present disclosure are service priority-specific or different for each service priority It can be set/limited for the terminal either independently or independently. For example, the parameter and/or whether the parameter is applied may be set/limited for the terminal in a service type-specific manner or differently or independently for each service type. For example, the parameter and/or whether the parameter is applied may be set/limited for the terminal differently or independently for each (service) QoS requirement specifically or for each (service) QoS requirement. For example, QoS requirements may include latency and/or reliability. For example, the parameter and/or whether the parameter is applied may be set/limited for the terminal differently or independently for each (resource pool) congestion level specifically or for each (resource pool) congestion level. For example, the congestion level may include CBR. For example, the parameter and/or whether the parameter is applied may be set/limited for the UE in a resource pool-specific manner or differently or independently for each resource pool. For example, the parameter and/or whether the parameter is applied or not may be set/limited for the terminal in a specific cast type or differently or independently for each cast type. For example, the cast type may include unicast, groupcast, or broadcast. For example, the parameter and/or whether the parameter is applied or not may be set/limited for the UE in a specific HARQ feedback scheme or differently or independently for each HARQ feedback scheme. For example, the HARQ feedback scheme may include an ACK/NACK feedback scheme or a NACK ONLY feedback scheme. For example, the parameter and/or whether the parameter is applied or not may be set/limited for the terminal in a specific SL operation mode or differently or independently for each SL operation mode. For example, the SL mode of operation may include mode 1 or mode 2. For example, the parameter and/or whether the parameter is applied may be set/limited for the UE in a specific MAC PDU or differently or independently for each MAC PDU. For example, the MAC PDU may include a HARQ FEEDBACK ENABLED MAC PDU or a HARQ FEEDBACK DISABLED MAC PDU. For example, the HARQ FEEDBACK ENABLED MAC PDU may be a MAC PDU composed of a packet related to a logical channel for which HARQ feedback is required. For example, the HARQ FEEDBACK DISABLED MAC PDU may be a packet related to a logical channel for which HARQ feedback is not required. It may be a configured MAC PDU. For example, the parameter and/or whether the parameter is applied may be set/limited for the UE in a TB-specific manner or differently or independently for each TB. For example, the TB may include a TB for which HARQ feedback is required or a TB for which HARQ feedback is not required. For example, the parameter and/or whether the parameter is applied (operated by the terminal (or operable)) (maximum or minimum or average) the number of SL sessions specifically or (operable (or operable) by the terminal) ) (maximum or minimum or average) may be set/limited for the terminal differently or independently for each number of SL sessions. For example, whether the parameter and/or the parameter is applied may be determined by the simultaneous reception/processing (or transmission) possible maximum (or minimum or average) number of PSFCHs (eg, UE CAPABILITY) of the terminal or simultaneous reception/processing of the terminal The maximum (or minimum or average) PSFCH number (eg, UE CAPABILITY) that can be processed (or transmitted) may be set/limited differently or independently for the UE. For example, the parameter and/or whether the parameter is applied may be set/limited for the terminal differently or independently for each PSFCH resource period-specific (resource pool-related) or (resource pool-related) PSFCH resource period. . For example, whether the parameter and/or the parameter is applied is the number of bits/information amount of the SL HARQ feedback transmitted through (specific) PUCCH or the number of bits/ It may be set/limited for the terminal differently or independently for each amount of information. For example, the number of bits/information amount of SL HARQ feedback may include the maximum number of bits/information amount of SL HARQ feedback, minimum number of bits/information amount of SL HARQ feedback, or average number of bits/information amount of SL HARQ feedback. For example, the parameter and/or whether the parameter is applied is determined by a (specific) PUCCH-linked (last) PSFCH slot (relevant (feedback bundling) PSSCH slot) (maximum or minimum or average) number of specific or (specific) ) PUCCH-linked (last) PSFCH slots (related (feedback bundling) PSSCH slots) (maximum or minimum or average) may be set/limited differently or independently for each terminal. For example, the parameter and/or whether the parameter is applied is determined by the number of (maximum or minimum or average) PSFCHs required for (simultaneous) reception (on the last PSFCH slot associated with PUCCH) for PUCCH information configuration. For PUCCH information configuration (on the last PSFCH slot interlocked with PUCCH), (simultaneous) reception is required (maximum or minimum or average) for each number of PSFCHs that are required to be configured/limited differently or independently for the UE. For example, the parameter and/or whether the parameter is applied or not depends on the value of the COUNTER SIDELINK ASSIGNMENT INDEX field (on DG DCI) specifically or the value of the COUNTER SIDELINK ASSIGNMENT INDEX field (on DG DCI) differently or independently for the terminal It can be set/limited. For example, whether the parameter and / or the application of the parameter is (in the resource pool) (on the last PSFCH slot associated with the PUCCH) SL slot related (maximum or minimum or average) symbol number / position-specific or (resource In the pool) (on the last PSFCH slot interlocked with the PUCCH) SL slot-related (maximum or minimum or average) symbol number/position may be set/limited differently or independently for the UE. For example, the parameter and/or whether the parameter is applied is determined (in the resource pool) (on the last PSFCH slot associated with the PUCCH) PSSCH-related (maximum or minimum or average) symbol number/position-specific or (resource pool) My) (on the last PSFCH slot interlocked with PUCCH) PSSCH-related (maximum or minimum or average) symbol number/position may be set/limited differently or independently for the UE. For example, the parameter and/or whether the parameter is applied is determined by the number/position of PSFCH symbols in the SL slot (on the last PSFCH slot associated with PUCCH) or in the SL slot (on the last PSFCH slot associated with PUCCH) It may be configured/limited for the UE differently or independently for each PSFCH symbol number/position. For example, the parameter and/or whether the parameter is applied is determined by (resource pool related) (preset) PSSCH DMRS time domain pattern specifically or (resource pool related) (preset) PSSCH DMRS time domain pattern It may be set/limited for the terminal differently or independently. For example, whether the parameter and / or the application of the parameter is (selectable) PSSCH (time domain) DMRS (pattern) the maximum (or minimum or average) number of symbols Specifically or (selectable) PSSCH (time domain) ) DMRS (pattern) may be set/limited for the terminal differently or independently for each maximum (or minimum or average) number of symbols. For example, whether the parameter and / or the application of the parameter is (selectable) PSSCH (time domain) DMRS (pattern) symbol position / index of the rearmost DMRS symbol in the SL slot specifically or (selectable) Among PSSCH (time domain) DMRS (pattern) symbols, the position/index of the rearmost DMRS symbol in the SL slot may be set/limited differently or independently for the UE. For example, whether the parameter and/or the parameter is applied is determined whether (in the resource pool) SL CSI-RS (and/or PT-RS) is configured specifically or (in the resource pool) the SL CSI-RS (and/or Or PT-RS) may be configured/limited for the UE differently or independently for each configuration. For example, the parameter and/or whether the parameter is applied may be set/limited for the terminal differently or independently for each synchronization error between Uu communication and SL communication specifically or for each synchronization error between Uu communication and SL communication. . For example, the synchronization error between Uu communication and SL communication may include a subframe boundary difference, a slot boundary difference, a symbol boundary difference, or a (start point) difference between SFN 0 and DFN 0. have. For example, whether the parameter and/or whether the parameter is applied is determined whether the synchronization error between the Uu communication and the SL communication exceeds a preset (allowable) threshold or specifically or whether the synchronization error between the Uu communication and the SL communication is preset (Allow) It may be set/limited for the terminal differently or independently according to whether the threshold is exceeded. For example, the parameter and/or whether the parameter is applied may be set/limited for the UE differently or independently for each PUCCH-related HARQ codebook type or for each PUCCH-related HARQ codebook type. For example, the PUCCH-related HARQ codebook type may include a SEMI-STATIC codebook or a DYNAMIC codebook. For example, the parameter and/or whether the parameter is applied is specific to the number of PUSCH symbols to which PUCCH is piggybacked (PSFCH-related) or (PSFCH-related) Differently or independently according to the number of PUSCH symbols to which PUCCH is piggybacked can be set/limited for the terminal. For example, the parameter and/or whether the parameter is applied may be set/limited for the terminal differently or independently for each number/position-specifically the number/position of DMRS symbols on the PUSCH or the number/position of the DMRS symbols on the PUSCH. . For example, the parameter and/or whether the parameter is applied may be set/limited for the terminal in a specific manner or differently or independently for each grant. For example, the grant may include mode 1 DG or CG. For example, the parameter and/or whether the parameter is applied may be set/limited for the terminal differently or independently for each (PSFCH) SL neuronology or (PSFCH) SL neuronology. For example, the numerology may include subcarrier spacing, CP length, or CP type. For example, the parameter and/or whether the parameter is applied may be set/limited for the terminal differently or independently for each (PUCCH) UL neuronology or (PUCCH) UL neuronology. For example, whether the parameter and/or the parameter is applied is a minimum value between UL neuronology and SL neuronology, or a minimum value between UL neuronology and SL neuronology. Differently or independently for each terminal. can For example, whether the parameter and/or the parameter is applied may be set/limited for the terminal differently or independently for each combination specific between UL neuronology and SL neurology or for each combination between UL neurology and SL neurology. can

According to an embodiment of the present disclosure, when the TX UE receives the PSFCH (from its target RX UE), the TX UE receives different HARQ feedback information (eg, ACK) having the same reception power (higher than a preset threshold). , NACK) associated with a plurality of PSFCH candidates may be detected. For example, when the TX UE receives the PSFCH (from its target RX UE), the TX UE has the same (peak) output (level) value of the PSFCH sequence correlation different HARQ feedback information ( A plurality of PSFCH candidates related to (eg, ACK, NACK) may be detected. In the above case, the TX UE may be configured to determine the corresponding PSFCH as (A) (always) NACK information or ACK information, or (B) ACK or NACK arbitrarily selected information (or a preset order (eg, NACK - > ACK -> NACK -> ...)), or (C) PSFCH related received power (or (peak) output (level) of PSFCH sequence correlation (higher than a preset threshold) value) may be set to determine ACK or NACK information based on a large sum (or average value or minimum value or maximum value), or (D) may be determined by the terminal implementation. Here, for example, when the UE receives a PSFCH (from its target RX UE), the UE receives a relatively high reception power (higher than a preset threshold) (or (peak) output (level) of the PSFCH sequence correlation. ) value) may be configured to determine whether ACK information or NACK information is present based on the PSFCH.

13 illustrates a method for a first device to perform wireless communication, according to an embodiment of the present disclosure. The embodiment of FIG. 13 may be combined with various embodiments of the present disclosure.

Referring to FIG. 13 , in step S1310, the first device may receive information related to an uplink (UL) resource for reporting sidelink (SL) hybrid automatic repeat request (HARQ) feedback to the base station from the base station. In step S1320, the first device may transmit first sidelink control information (SCI) to the second device through a physical sidelink control channel (PSCCH). In step S1330, the first device may transmit a second SCI and MAC PDU (medium access control protocol data unit) to the second device through a physical sidelink shared channel (PSSCH) related to the PSCCH. In step S1340, the first device may determine a physical sidelink feedback channel (PSFCH) resource based on the index of the slot and the index of the subchannel related to the PSSCH. In step S1350, the first device may transmit the SL HARQ feedback for the MAC PDU to the base station based on the UL resource. For example, the minimum time gap between the PSFCH resource and the UL resource may be determined based on N, X, the numerology of the SL BWP (bandwidth part), and the numonology of the UL BWP, where N is the SL BWP. It may be determined based on the minimum value among the pneumology and the pneumology of the UL BWP, and X may be determined based on information related to priority.

For example, the priority may be the highest priority among at least one priority allowed for an SL grant allocated by the base station for transmission of the MAC PDU.

For example, X determined based on a low priority may be greater than X determined based on a high priority.

For example, X may be determined based on a latency requirement, and X determined based on a long delay requirement may be greater than X determined based on a short delay requirement.

For example, X may be determined based on a HARQ feedback option related to the MAC PDU, and the HARQ feedback option may be either a only NACK feedback option or an ACK/NACK feedback option, and the ACK/NACK feedback option X determined based on the X may be greater than X determined based on the only NACK feedback option.

For example, X may be determined based on the period of the PSFCH resource, and X determined based on the period of the large PSFCH resource may be greater than X determined based on the period of the small PSFCH resource.

Additionally, for example, the first device may report information related to simultaneous processing capability for the PSFCH of the first device to the base station. Here, for example, X may be determined based on the simultaneous processing capability for the PSFCH of the first device, and X determined based on the simultaneous processing capability for the low PSFCH is based on the simultaneous processing capability for the high PSFCH. It can be greater than X determined by

For example, X may be determined based on an error between a first synchronization related to Uu communication between the base station and the first device and a second synchronization related to SL communication between the first device and the second device, and , X determined based on a large error may be greater than X determined based on a small error. Additionally, for example, the first device may report information related to the error to the base station.

Additionally, for example, the first device may measure a channel busy ratio (CBR) for the resource pool, and the first device may report information on the CBR to the base station. Here, for example, X may be determined based on the CBR, and X determined based on the large CBR may be smaller than X determined based on the small CBR.

For example, X may be determined based on the cast type of the first device, the cast type may include groupcast or unicast, and X determined based on the groupcast may be determined based on the unicast. It may be smaller than the determined X. Additionally, for example, the first device may report information related to the cast type to the base station.

For example, the minimum time gap may be less than or equal to a time gap between the UL resource and the PSFCH resource.

For example, the UL resource may be associated with at least one PSFCH resource, the PSFCH resource may be a last PSFCH resource among the at least one PSFCH resource, and the minimum time gap may be between the UL resource and the PSFCH resource. Based on a greater than a time gap of , the SL HARQ feedback related to the last PSFCH resource may not be included in the SL HARQ feedback transmitted to the base station.

For example, it may be determined that the SL HARQ feedback is NACK based on a plurality of PSFCHs having the same reception power being detected on the PSFCH resource.

The proposed method may be applied to an apparatus according to various embodiments of the present disclosure. First, the processor 102 of the first device 100 receives information related to an uplink (UL) resource for reporting SL (sidelink) hybrid automatic repeat request (HARQ) feedback to the base station from the base station. can be controlled In addition, the processor 102 of the first device 100 may control the transceiver 106 to transmit first sidelink control information (SCI) to the second device through a physical sidelink control channel (PSCCH). In addition, the processor 102 of the first device 100 transmits a second SCI and a MAC medium access control protocol data unit (PDU) to the second device through a physical sidelink shared channel (PSSCH) related to the PSCCH. The transceiver 106 may be controlled. In addition, the processor 102 of the first device 100 may determine a physical sidelink feedback channel (PSFCH) resource based on the index of the slot and the index of the subchannel related to the PSSCH. In addition, the processor 102 of the first device 100 may control the transceiver 106 to transmit the SL HARQ feedback for the MAC PDU to the base station based on the UL resource. For example, the minimum time gap between the PSFCH resource and the UL resource may be determined based on N, X, the numerology of the SL BWP (bandwidth part), and the numonology of the UL BWP, where N is the SL BWP. It may be determined based on the minimum value among the pneumology and the pneumology of the UL BWP, and X may be determined based on information related to priority.

According to an embodiment of the present disclosure, a first device for performing wireless communication may be provided. For example, the first device may include one or more memories for storing instructions; one or more transceivers; and one or more processors connecting the one or more memories and the one or more transceivers. For example, the one or more processors may execute the instructions to receive, from a base station, information related to an uplink (UL) resource for reporting sidelink (SL) hybrid automatic repeat request (HARQ) feedback to the base station; transmit first sidelink control information (SCI) to the second device through a physical sidelink control channel (PSCCH); transmit a second SCI and a MAC PDU (medium access control protocol data unit) to the second device through a physical sidelink shared channel (PSSCH) related to the PSCCH; determine a physical sidelink feedback channel (PSFCH) resource based on the index of the slot and the index of the subchannel related to the PSSCH; and based on the UL resource, the SL HARQ feedback for the MAC PDU may be transmitted to the base station. For example, the minimum time gap between the PSFCH resource and the UL resource may be determined based on N, X, the numerology of the SL BWP (bandwidth part), and the numonology of the UL BWP, where N is the SL BWP. It may be determined based on the minimum value among the numerology and the numerology of the UL BWP, and X may be determined based on information related to priority.

According to an embodiment of the present disclosure, an apparatus configured to control the first terminal may be provided. For example, a device may include one or more processors; and one or more memories operably coupled by the one or more processors and storing instructions. For example, the one or more processors may execute the instructions to receive, from a base station, information related to an uplink (UL) resource for reporting sidelink (SL) hybrid automatic repeat request (HARQ) feedback to the base station; transmitting first sidelink control information (SCI) to the second terminal through a physical sidelink control channel (PSCCH); transmitting a second SCI and a MAC PDU (medium access control protocol data unit) to the second terminal through a physical sidelink shared channel (PSSCH) related to the PSCCH; determine a physical sidelink feedback channel (PSFCH) resource based on the index of the slot and the index of the subchannel related to the PSSCH; and based on the UL resource, the SL HARQ feedback for the MAC PDU may be transmitted to the base station. For example, the minimum time gap between the PSFCH resource and the UL resource may be determined based on N, X, the numerology of the SL BWP (bandwidth part), and the numonology of the UL BWP, where N is the SL BWP. It may be determined based on the minimum value among the pneumology and the pneumology of the UL BWP, and X may be determined based on information related to priority.

According to an embodiment of the present disclosure, a non-transitory computer-readable storage medium recording instructions may be provided. For example, the instructions, when executed by one or more processors, cause the one or more processors to: a UL for reporting, by a first device, a sidelink (SL) hybrid automatic repeat request (HARQ) feedback to a base station (uplink) to receive information related to a resource from a base station; send, by the first device, first sidelink control information (SCI) to a second device through a physical sidelink control channel (PSCCH); transmit, by the first device, a second SCI and a MAC medium access control protocol data unit (PDU) to the second device through a physical sidelink shared channel (PSSCH) related to the PSCCH; determine, by the first device, a physical sidelink feedback channel (PSFCH) resource based on the index of the slot and the index of the subchannel related to the PSSCH; and the first device may transmit the SL HARQ feedback for the MAC PDU to the base station based on the UL resource. For example, the minimum time gap between the PSFCH resource and the UL resource may be determined based on N, X, the numerology of the SL BWP (bandwidth part), and the numonology of the UL BWP, where N is the SL BWP. It may be determined based on the minimum value among the numerology and the numerology of the UL BWP, and X may be determined based on information related to priority.

14 illustrates a method for a base station to perform wireless communication, according to an embodiment of the present disclosure. The embodiment of FIG. 14 may be combined with various embodiments of the present disclosure.

Referring to FIG. 14 , in step S1410, the base station may transmit information related to an uplink (UL) resource for reporting sidelink (SL) hybrid automatic repeat request (HARQ) feedback to the base station to the first device. In step S1420, the base station may receive the SL HARQ feedback for a MAC PDU (medium access control protocol data unit) from the first device based on the UL resource. For example, the MAC PDU may be transmitted by the first device to a second device through a physical sidelink control channel (PSSCH), and a physical sidelink feedback channel (PSFCH) resource includes an index and sub of a slot related to the PSSCH. It may be determined based on the index of the channel, and the minimum time gap between the UL resource and the PSFCH resource may be determined based on N, X, SL BWP (bandwidth part) numerology, and UL BWP numerology, N may be determined based on a minimum value among the numerology of the SL BWP and the numerology of the UL BWP, and X may be determined based on information related to priority.

The proposed method may be applied to an apparatus according to various embodiments of the present disclosure. First, the processor 202 of the base station 200 transmits information related to an uplink (UL) resource for reporting sidelink (SL) hybrid automatic repeat request (HARQ) feedback to the base station to the first device. Transceiver 206 can control And, the processor 202 of the base station 200 controls the transceiver 206 to receive the SL HARQ feedback for a MAC medium access control protocol data unit (PDU) from the first device based on the UL resource. can For example, the MAC PDU may be transmitted by the first device to a second device through a physical sidelink control channel (PSSCH), and a physical sidelink feedback channel (PSFCH) resource includes an index and sub of a slot related to the PSSCH. It may be determined based on the index of the channel, and the minimum time gap between the UL resource and the PSFCH resource may be determined based on N, X, SL BWP (bandwidth part) numerology, and UL BWP numerology, N may be determined based on a minimum value among the numerology of the SL BWP and the numerology of the UL BWP, and X may be determined based on information related to priority.

According to an embodiment of the present disclosure, a base station performing wireless communication may be provided. For example, the base station may include one or more memories to store instructions; one or more transceivers; and one or more processors connecting the one or more memories and the one or more transceivers. For example, the one or more processors execute the instructions to transmit information related to an uplink (UL) resource for reporting sidelink (SL) hybrid automatic repeat request (HARQ) feedback to the base station to the first device; and based on the UL resource, the SL HARQ feedback for a MAC PDU (medium access control protocol data unit) may be received from the first device. For example, the MAC PDU may be transmitted by the first device to a second device through a physical sidelink control channel (PSSCH), and a physical sidelink feedback channel (PSFCH) resource includes an index and sub of a slot related to the PSSCH. It may be determined based on the index of the channel, and the minimum time gap between the UL resource and the PSFCH resource may be determined based on N, X, SL BWP (bandwidth part) numerology, and UL BWP numerology, N may be determined based on a minimum value among the numerology of the SL BWP and the numerology of the UL BWP, and X may be determined based on information related to priority.

According to an embodiment of the present disclosure, an apparatus configured to control a base station may be provided. For example, a device may include one or more processors; and one or more memories operably coupled by the one or more processors and storing instructions. For example, the one or more processors execute the instructions to transmit information related to an uplink (UL) resource for reporting sidelink (SL) hybrid automatic repeat request (HARQ) feedback to the base station to the first terminal; and based on the UL resource, the SL HARQ feedback for a MAC PDU (medium access control protocol data unit) may be received from the first terminal. For example, the MAC PDU may be transmitted by the first terminal to a second terminal through a physical sidelink control channel (PSSCH), and a physical sidelink feedback channel (PSFCH) resource is an index and sub of a slot related to the PSSCH. It may be determined based on the index of the channel, and the minimum time gap between the UL resource and the PSFCH resource may be determined based on N, X, SL BWP (bandwidth part) numerology, and UL BWP numerology, N may be determined based on a minimum value among the numerology of the SL BWP and the numerology of the UL BWP, and X may be determined based on information related to priority.

According to an embodiment of the present disclosure, a non-transitory computer-readable storage medium recording instructions may be provided. For example, the instructions, when executed by one or more processors, cause the one or more processors to: UL (by a base station) to report sidelink (SL) hybrid automatic repeat request (HARQ) feedback to the base station uplink) to transmit information related to a resource to the first device; and, by the base station, based on the UL resource, the SL HARQ feedback for a MAC PDU (medium access control protocol data unit) may be received from the first device. For example, the MAC PDU may be transmitted by the first device to a second device through a physical sidelink control channel (PSSCH), and a physical sidelink feedback channel (PSFCH) resource includes an index and sub of a slot related to the PSSCH. It may be determined based on the index of the channel, and the minimum time gap between the UL resource and the PSFCH resource may be determined based on N, X, SL BWP (bandwidth part) numerology, and UL BWP numerology, N may be determined based on a minimum value among the numerology of the SL BWP and the numerology of the UL BWP, and X may be determined based on information related to priority.

According to various embodiments of the present disclosure, the time gap (the terminal is interested and / or allowed in the MODE 1 SL grant) SL service related (tightest) QoS requirements (eg, delay, reliability), (the highest ) priority, the amount of SL HARQ feedback information (to be transmitted through the UL channel), the congestion level in the (most recent) resource pool (reported to the base station), based on parameters such as the associated SL cast type, Or it can be set independently. For example, since the required number of retransmissions may be higher as the CBR value is higher, the time gap may be set small to ensure the corresponding number of retransmissions within the remaining packet delay budget (PDB). For example, in the case of a groupcast in which a large number of target RX UEs exist, since the number of retransmissions required may be greater than that of unicast, the time gap may be set small. For example, the value of X may be determined based on the highest priority of a logical channel used by the UE for a scheduling request (SR) or a buffer status report (BSR). Accordingly, it is possible to solve the problem that the terminal implementation becomes complicated to support the meaningless/useless capability.

Various embodiments of the present disclosure may be combined with each other.

Hereinafter, an apparatus to which various embodiments of the present disclosure may be applied will be described.

Although not limited thereto, various descriptions, functions, procedures, suggestions, methods, and/or operation flowcharts disclosed in this document may be applied to various fields requiring wireless communication/connection (eg, 5G) between devices.

Hereinafter, it will be exemplified in more detail with reference to the drawings. In the following drawings/descriptions, the same reference numerals may represent the same or corresponding hardware blocks, software blocks, or functional blocks, unless otherwise indicated.

Referring to FIG. 15 , a communication system 1 to which various embodiments of the present disclosure are applied includes a wireless device, a base station, and a network. Here, the wireless device refers to a device that performs communication using a radio access technology (eg, 5G NR (New RAT), LTE (Long Term Evolution)), and may be referred to as a communication/wireless/5G device. Although not limited thereto, the wireless device includes a robot 100a, a vehicle 100b-1, 100b-2, an eXtended Reality (XR) device 100c, a hand-held device 100d, and a home appliance 100e. ), an Internet of Thing (IoT) device 100f, and an AI device/server 400 . For example, the vehicle may include a vehicle equipped with a wireless communication function, an autonomous driving vehicle, a vehicle capable of performing inter-vehicle communication, and the like. Here, the vehicle may include an Unmanned Aerial Vehicle (UAV) (eg, a drone). XR devices include AR (Augmented Reality)/VR (Virtual Reality)/MR (Mixed Reality) devices, and include a Head-Mounted Device (HMD), a Head-Up Display (HUD) provided in a vehicle, a television, a smartphone, It may be implemented in the form of a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, and the like. The mobile device may include a smartphone, a smart pad, a wearable device (eg, a smart watch, smart glasses), a computer (eg, a laptop computer), and the like. Home appliances may include a TV, a refrigerator, a washing machine, and the like. The IoT device may include a sensor, a smart meter, and the like. For example, the base station and the network may be implemented as a wireless device, and the specific wireless device 200a may operate as a base station/network node to other wireless devices.

Here, the wireless communication technology implemented in the wireless devices 100a to 100f of the present specification may include a narrowband Internet of Things for low-power communication as well as LTE, NR, and 6G. At this time, for example, NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology, may be implemented in standards such as LTE Cat NB1 and/or LTE Cat NB2, and is limited to the above-mentioned names no. Additionally or alternatively, the wireless communication technology implemented in the wireless devices 100a to 100f of the present specification may perform communication based on the LTE-M technology. In this case, as an example, the LTE-M technology may be an example of an LPWAN technology, and may be called by various names such as enhanced machine type communication (eMTC). For example, LTE-M technology is 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-Bandwidth Limited), 5) LTE-MTC, 6) LTE Machine Type Communication, and/or 7) may be implemented in at least one of various standards such as LTE M, and is not limited to the above-described name. Additionally or alternatively, the wireless communication technology implemented in the wireless devices 100a to 100f of the present specification is at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN) in consideration of low power communication. It may include any one, and is not limited to the above-mentioned names. For example, the ZigBee technology can create PAN (personal area networks) related to small/low-power digital communication based on various standards such as IEEE 802.15.4, and can be called by various names.

The wireless devices 100a to 100f may be connected to the network 300 through the base station 200 . Artificial intelligence (AI) technology may be applied to the wireless devices 100a to 100f , and the wireless devices 100a to 100f may be connected to the AI server 400 through the network 300 . The network 300 may be configured using a 3G network, a 4G (eg, LTE) network, or a 5G (eg, NR) network. The wireless devices 100a to 100f may communicate with each other through the base station 200/network 300, but may also communicate directly (e.g. sidelink communication) without passing through the base station/network. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (eg, Vehicle to Vehicle (V2V)/Vehicle to everything (V2X) communication). In addition, the IoT device (eg, sensor) may directly communicate with other IoT devices (eg, sensor) or other wireless devices 100a to 100f.

Wireless communication/

connection

150a, 150b, and 150c may be performed between the wireless devices 100a to 100f/base station 200 and the base station 200/base station 200 . Here, the wireless communication/connection includes uplink/downlink communication 150a and sidelink communication 150b (or D2D communication), and communication between base stations 150c (eg relay, IAB (Integrated Access Backhaul)). This can be done through technology (eg 5G NR) Wireless communication/

connection

150a, 150b, 150c allows the wireless device and the base station/radio device, and the base station and the base station to transmit/receive wireless signals to each other. For example, the wireless communication/

connection

150a, 150b, 150c may transmit/receive a signal through various physical channels.To this end, based on various proposals of the present disclosure, At least some of various configuration information setting processes, various signal processing processes (eg, channel encoding/decoding, modulation/demodulation, resource mapping/demapping, etc.), resource allocation processes, etc. may be performed.

Referring to FIG. 16 , the first wireless device 100 and the second wireless device 200 may transmit/receive wireless signals through various wireless access technologies (eg, LTE, NR). Here, {first wireless device 100, second wireless device 200} is {wireless device 100x, base station 200} of FIG. 15 and/or {wireless device 100x, wireless device 100x) } can be matched.

The first wireless device 100 includes one or more processors 102 and one or more memories 104 , and may further include one or more transceivers 106 and/or one or more antennas 108 . The processor 102 controls the memory 104 and/or the transceiver 106 and may be configured to implement the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed herein. For example, the processor 102 may process the information in the memory 104 to generate the first information/signal, and then transmit a wireless signal including the first information/signal through the transceiver 106 . In addition, the processor 102 may store the information obtained from the signal processing of the second information/signal in the memory 104 after receiving the radio signal including the second information/signal through the transceiver 106 . The memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102 . For example, the memory 104 may provide instructions for performing some or all of the processes controlled by the processor 102 , or for performing the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed herein. may store software code including Here, the processor 102 and the memory 104 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR). The transceiver 106 may be coupled with the processor 102 and may transmit and/or receive wireless signals via one or more antennas 108 . The transceiver 106 may include a transmitter and/or a receiver. The transceiver 106 may be used interchangeably with a radio frequency (RF) unit. In the present disclosure, a wireless device may mean a communication modem/circuit/chip.

The second wireless device 200 includes one or more processors 202 , one or more memories 204 , and may further include one or more transceivers 206 and/or one or more antennas 208 . The processor 202 controls the memory 204 and/or the transceiver 206 and may be configured to implement the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed herein. For example, the processor 202 may process the information in the memory 204 to generate third information/signal, and then transmit a wireless signal including the third information/signal through the transceiver 206 . In addition, the processor 202 may receive the radio signal including the fourth information/signal through the transceiver 206 , and then store information obtained from signal processing of the fourth information/signal in the memory 204 . The memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202 . For example, the memory 204 may provide instructions for performing some or all of the processes controlled by the processor 202 , or for performing the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed herein. may store software code including Here, the processor 202 and the memory 204 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR). The transceiver 206 may be coupled to the processor 202 and may transmit and/or receive wireless signals via one or more antennas 208 . The transceiver 206 may include a transmitter and/or a receiver. The transceiver 206 may be used interchangeably with an RF unit. In the present disclosure, a wireless device may mean a communication modem/circuit/chip.

Hereinafter, hardware elements of the

wireless devices

100 and 200 will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or

more processors

102 , 202 . For example, one or

more processors

102 , 202 may implement one or more layers (eg, functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). The one or

more processors

102, 202 may be configured to process one or more Protocol Data Units (PDUs) and/or one or more Service Data Units (SDUs) according to the description, function, procedure, proposal, method, and/or operational flowcharts disclosed herein. can create One or

more processors

102, 202 may generate messages, control information, data, or information according to the description, function, procedure, proposal, method, and/or flow charts disclosed herein. The one or

more processors

102 and 202 generate a signal (eg, a baseband signal) including PDUs, SDUs, messages, control information, data or information according to the functions, procedures, proposals and/or methods disclosed in this document. , to one or

more transceivers

106 and 206 . The one or

more processors

102 , 202 may receive signals (eg, baseband signals) from one or

more transceivers

106 , 206 , and may be described, functions, procedures, proposals, methods, and/or flowcharts of operation disclosed herein. PDUs, SDUs, messages, control information, data, or information may be acquired according to the above.

One or

more processors

102, 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer. One or

more processors

102, 202 may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in one or

more processors

102 , 202 . The descriptions, functions, procedures, proposals, methods, and/or flowcharts of operations disclosed in this document may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, and the like. The descriptions, functions, procedures, suggestions, methods, and/or flow charts disclosed in this document provide that firmware or software configured to perform is included in one or

more processors

102 , 202 , or stored in one or

more memories

104 , 204 . It may be driven by the

above processors

102 and 202 . The descriptions, functions, procedures, suggestions, methods, and/or flow charts disclosed herein may be implemented using firmware or software in the form of code, instructions, and/or a set of instructions.

One or

more memories

104 , 204 may be coupled to one or

more processors

102 , 202 and may store various forms of data, signals, messages, information, programs, code, instructions, and/or instructions. One or

more memories

104 , 204 may be comprised of ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer readable storage media, and/or combinations thereof. One or

more memories

104 , 204 may be located inside and/or external to one or

more processors

102 , 202 . In addition, one or

more memories

104 , 204 may be coupled to one or

more processors

102 , 202 through various technologies, such as wired or wireless connections.

One or

more transceivers

106 , 206 may transmit user data, control information, radio signals/channels, etc. referred to in the methods and/or operational flowcharts of this document to one or more other devices. The one or

more transceivers

106, 206 may receive user data, control information, radio signals/channels, etc. referred to in the descriptions, functions, procedures, suggestions, methods and/or flow charts, etc. disclosed herein, from one or more other devices. have. For example, one or

more transceivers

106 , 206 may be coupled to one or

more processors

102 , 202 and may transmit and receive wireless signals. For example, one or

more processors

102 , 202 may control one or

more transceivers

106 , 206 to transmit user data, control information, or wireless signals to one or more other devices. In addition, one or

more processors

102 , 202 may control one or

more transceivers

106 , 206 to receive user data, control information, or wireless signals from one or more other devices. Further, one or

more transceivers

106, 206 may be coupled with one or

more antennas

108, 208, and the one or

more transceivers

106, 206 may be coupled via one or

more antennas

108, 208 to the descriptions, functions, and functions disclosed herein. , procedures, proposals, methods and/or operation flowcharts, etc. may be set to transmit and receive user data, control information, radio signals/channels, and the like. In this document, one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (eg, antenna ports). The one or

more transceivers

106, 206 convert the received radio signal/channel, etc. from the RF band signal to process the received user data, control information, radio signal/channel, etc. using the one or

more processors

102, 202. It can be converted into a baseband signal. One or

more transceivers

106 and 206 may convert user data, control information, radio signals/channels, etc. processed using one or

more processors

102 and 202 from baseband signals to RF band signals. To this end, one or

more transceivers

106 , 206 may include (analog) oscillators and/or filters.

Referring to FIG. 17 , the signal processing circuit 1000 may include a scrambler 1010 , a modulator 1020 , a layer mapper 1030 , a precoder 1040 , a resource mapper 1050 , and a signal generator 1060 . have. Although not limited thereto, the operations/functions of FIG. 17 may be performed by the

processors

102 and 202 and/or the

transceivers

106 and 206 of FIG. 16 . The hardware elements of FIG. 17 may be implemented in the

processors

102 , 202 and/or

transceivers

106 , 206 of FIG. 16 . For example, blocks 1010 to 1060 may be implemented in the

processors

102 and 202 of FIG. 16 . Further, blocks 1010 to 1050 may be implemented in the

processors

102 and 202 of FIG. 16 , and block 1060 may be implemented in the

transceivers

106 and 206 of FIG. 16 .

The codeword may be converted into a wireless signal through the signal processing circuit 1000 of FIG. 17 . Here, the codeword is a coded bit sequence of an information block. The information block may include a transport block (eg, a UL-SCH transport block, a DL-SCH transport block). The radio signal may be transmitted through various physical channels (eg, PUSCH, PDSCH).

Specifically, the codeword may be converted into a scrambled bit sequence by the scrambler 1010 . A scramble sequence used for scrambling is generated based on an initialization value, and the initialization value may include ID information of a wireless device, and the like. The scrambled bit sequence may be modulated by a modulator 1020 into a modulation symbol sequence. The modulation method may include pi/2-Binary Phase Shift Keying (pi/2-BPSK), m-Phase Shift Keying (m-PSK), m-Quadrature Amplitude Modulation (m-QAM), and the like. The complex modulation symbol sequence may be mapped to one or more transport layers by the layer mapper 1030 . Modulation symbols of each transport layer may be mapped to corresponding antenna port(s) by the precoder 1040 (precoding). The output z of the precoder 1040 may be obtained by multiplying the output y of the layer mapper 1030 by the precoding matrix W of N*M. Here, N is the number of antenna ports, and M is the number of transmission layers. Here, the precoder 1040 may perform precoding after performing transform precoding (eg, DFT transform) on the complex modulation symbols. Also, the precoder 1040 may perform precoding without performing transform precoding.

The resource mapper 1050 may map modulation symbols of each antenna port to a time-frequency resource. The time-frequency resource may include a plurality of symbols (eg, a CP-OFDMA symbol, a DFT-s-OFDMA symbol) in the time domain and a plurality of subcarriers in the frequency domain. The signal generator 1060 generates a radio signal from the mapped modulation symbols, and the generated radio signal may be transmitted to another device through each antenna. To this end, the signal generator 1060 may include an Inverse Fast Fourier Transform (IFFT) module and a Cyclic Prefix (CP) inserter, a Digital-to-Analog Converter (DAC), a frequency uplink converter, and the like. .

The signal processing process for the received signal in the wireless device may be configured in reverse of the signal processing process 1010 to 1060 of FIG. 17 . For example, the wireless device (eg, 100 and 200 of FIG. 16 ) may receive a wireless signal from the outside through an antenna port/transceiver. The received radio signal may be converted into a baseband signal through a signal restorer. To this end, the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a Fast Fourier Transform (FFT) module. Thereafter, the baseband signal may be restored to a codeword through a resource de-mapper process, a postcoding process, a demodulation process, and a descrambling process. The codeword may be restored to the original information block through decoding. Accordingly, the signal processing circuit (not shown) for the received signal may include a signal restorer, a resource de-mapper, a postcoder, a demodulator, a descrambler, and a decoder.

18 illustrates a wireless device according to an embodiment of the present disclosure. The wireless device may be implemented in various forms according to use-examples/services (refer to FIG. 15 ).

Referring to FIG. 18 ,

wireless devices

100 and 200 correspond to

wireless devices

100 and 200 of FIG. 16 , and various elements, components, units/units, and/or modules ) can be composed of For example, the

wireless devices

100 and 200 may include a communication unit 110 , a control unit 120 , a memory unit 130 , and an additional element 140 . The communication unit may include communication circuitry 112 and transceiver(s) 114 . For example, communication circuitry 112 may include one or more processors 102,202 and/or one or more memories 104,204 of FIG. 16 . For example, the transceiver(s) 114 may include one or

more transceivers

106 , 206 and/or one or

more antennas

108 , 208 of FIG. 16 . The control unit 120 is electrically connected to the communication unit 110 , the memory unit 130 , and the additional element 140 , and controls general operations of the wireless device. For example, the controller 120 may control the electrical/mechanical operation of the wireless device based on the program/code/command/information stored in the memory unit 130 . In addition, the control unit 120 transmits the information stored in the memory unit 130 to the outside (eg, another communication device) through the communication unit 110 through a wireless/wired interface, or through the communication unit 110 to the outside (eg, Information received through a wireless/wired interface from another communication device) may be stored in the memory unit 130 .

The additional element 140 may be configured in various ways according to the type of the wireless device. For example, the additional element 140 may include at least one of a power unit/battery, an input/output unit (I/O unit), a driving unit, and a computing unit. Although not limited thereto, the wireless device includes a robot ( FIGS. 15 and 100a ), a vehicle ( FIGS. 15 , 100b-1 , 100b-2 ), an XR device ( FIGS. 15 and 100c ), a mobile device ( FIGS. 15 and 100d ), and a home appliance. (FIG. 15, 100e), IoT device (FIG. 15, 100f), digital broadcasting terminal, hologram device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate/environment device, It may be implemented in the form of an AI server/device ( FIGS. 15 and 400 ), a base station ( FIGS. 15 and 200 ), and a network node. The wireless device may be mobile or used in a fixed location depending on the use-example/service.

In FIG. 18 , various elements, components, units/units, and/or modules in the

wireless devices

100 and 200 may be entirely interconnected through a wired interface, or at least some of them may be wirelessly connected through the communication unit 110 . For example, in the

wireless devices

100 and 200 , the control unit 120 and the communication unit 110 are connected by wire, and the control unit 120 and the first unit (eg, 130 and 140 ) are connected to the communication unit 110 through the communication unit 110 . It can be connected wirelessly. In addition, each element, component, unit/unit, and/or module within the

wireless device

100 , 200 may further include one or more elements. For example, the controller 120 may be configured with one or more processor sets. For example, the controller 120 may include a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphic processing processor, a memory control processor, and the like. As another example, the memory unit 130 may include random access memory (RAM), dynamic RAM (DRAM), read only memory (ROM), flash memory, volatile memory, and non-volatile memory. volatile memory) and/or a combination thereof.

Hereinafter, the embodiment of FIG. 18 will be described in more detail with reference to the drawings.

19 illustrates a portable device according to an embodiment of the present disclosure. The portable device may include a smart phone, a smart pad, a wearable device (eg, a smart watch, smart glasses), and a portable computer (eg, a laptop computer). A mobile device may be referred to as a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), an advanced mobile station (AMS), or a wireless terminal (WT).

Referring to FIG. 19 , the portable device 100 includes an antenna unit 108 , a communication unit 110 , a control unit 120 , a memory unit 130 , a power supply unit 140a , an interface unit 140b , and an input/output unit 140c . ) may be included. The antenna unit 108 may be configured as a part of the communication unit 110 . Blocks 110 to 130/140a to 140c respectively correspond to blocks 110 to 130/140 of FIG. 18 .

The communication unit 110 may transmit and receive signals (eg, data, control signals, etc.) with other wireless devices and base stations. The controller 120 may control components of the portable device 100 to perform various operations. The controller 120 may include an application processor (AP). The memory unit 130 may store data/parameters/programs/codes/commands necessary for driving the portable device 100 . Also, the memory unit 130 may store input/output data/information. The power supply unit 140a supplies power to the portable device 100 and may include a wired/wireless charging circuit, a battery, and the like. The interface unit 140b may support the connection between the portable device 100 and other external devices. The interface unit 140b may include various ports (eg, an audio input/output port and a video input/output port) for connection with an external device. The input/output unit 140c may receive or output image information/signal, audio information/signal, data, and/or information input from a user. The input/output unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and/or a haptic module.

For example, in the case of data communication, the input/output unit 140c obtains information/signals (eg, touch, text, voice, image, video) input from the user, and the obtained information/signal is stored in the memory unit 130 . can be saved. The communication unit 110 may convert the information/signal stored in the memory into a wireless signal, and transmit the converted wireless signal directly to another wireless device or to a base station. Also, after receiving a radio signal from another radio device or base station, the communication unit 110 may restore the received radio signal to original information/signal. The restored information/signal may be stored in the memory unit 130 and output in various forms (eg, text, voice, image, video, haptic) through the input/output unit 140c.

20 illustrates a vehicle or an autonomous driving vehicle according to an embodiment of the present disclosure. The vehicle or autonomous driving vehicle may be implemented as a mobile robot, vehicle, train, manned/unmanned aerial vehicle (AV), ship, or the like.

Referring to FIG. 20 , the vehicle or autonomous driving vehicle 100 includes an antenna unit 108 , a communication unit 110 , a control unit 120 , a driving unit 140a , a power supply unit 140b , a sensor unit 140c and autonomous driving. It may include a part 140d. The antenna unit 108 may be configured as a part of the communication unit 110 . Blocks 110/130/140a-140d correspond to blocks 110/130/140 of FIG. 18, respectively.

The communication unit 110 may transmit/receive signals (eg, data, control signals, etc.) to and from external devices such as other vehicles, base stations (eg, base stations, roadside units, etc.), servers, and the like. The controller 120 may control elements of the vehicle or the autonomous driving vehicle 100 to perform various operations. The controller 120 may include an Electronic Control Unit (ECU). The driving unit 140a may cause the vehicle or the autonomous driving vehicle 100 to run on the ground. The driving unit 140a may include an engine, a motor, a power train, a wheel, a brake, a steering device, and the like. The power supply unit 140b supplies power to the vehicle or the autonomous driving vehicle 100 , and may include a wired/wireless charging circuit, a battery, and the like. The sensor unit 140c may obtain vehicle status, surrounding environment information, user information, and the like. The sensor unit 140c includes an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, an inclination sensor, a weight sensor, a heading sensor, a position module, and a vehicle forward movement. / may include a reverse sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illuminance sensor, a pedal position sensor, and the like. The autonomous driving unit 140d includes a technology for maintaining a driving lane, a technology for automatically adjusting speed such as adaptive cruise control, a technology for automatically driving along a predetermined route, and a technology for automatically setting a route when a destination is set. technology can be implemented.

For example, the communication unit 110 may receive map data, traffic information data, and the like from an external server. The autonomous driving unit 140d may generate an autonomous driving route and a driving plan based on the acquired data. The controller 120 may control the driving unit 140a to move the vehicle or the autonomous driving vehicle 100 along the autonomous driving path (eg, speed/direction adjustment) according to the driving plan. During autonomous driving, the communication unit 110 may non/periodically acquire the latest traffic information data from an external server, and may acquire surrounding traffic information data from surrounding vehicles. Also, during autonomous driving, the sensor unit 140c may acquire vehicle state and surrounding environment information. The autonomous driving unit 140d may update the autonomous driving route and driving plan based on the newly acquired data/information. The communication unit 110 may transmit information about a vehicle location, an autonomous driving route, a driving plan, and the like to an external server. The external server may predict traffic information data in advance using AI technology or the like based on information collected from the vehicle or autonomous vehicles, and may provide the predicted traffic information data to the vehicle or autonomous vehicles.

The claims described herein may be combined in various ways. For example, the technical features of the method claims of the present specification may be combined and implemented as an apparatus, and the technical features of the apparatus claims of the present specification may be combined and implemented as a method. In addition, the technical features of the method claim of the present specification and the technical features of the apparatus claim may be combined to be implemented as an apparatus, and the technical features of the method claim of the present specification and the technical features of the apparatus claim may be combined and implemented as a method.

Claims

A method for a first device to perform wireless communication, the method comprising:

Receiving information related to an uplink (UL) resource for reporting sidelink (SL) hybrid automatic repeat request (HARQ) feedback to the base station from the base station;

transmitting first sidelink control information (SCI) to a second device through a physical sidelink control channel (PSCCH);

transmitting a second SCI and MAC PDU (medium access control protocol data unit) to the second device through a physical sidelink shared channel (PSSCH) related to the PSCCH;

determining a physical sidelink feedback channel (PSFCH) resource based on the index of the slot and the index of the subchannel related to the PSSCH; and

Transmitting the SL HARQ feedback for the MAC PDU to the base station based on the UL resource; including,

The minimum time gap between the PSFCH resource and the UL resource is determined based on the numerology of N, X, SL BWP (bandwidth part), and UL BWP,

N is determined based on the minimum value among the pneumonology of the SL BWP and the pneumonology of the UL BWP, and

X is determined based on the information related to the priority, the method.
The method of claim 1,

The priority is the highest priority among at least one priority allowed for an SL grant allocated by the base station for transmission of the MAC PDU.
The method of claim 1,

X determined based on low priority is greater than X determined based on high priority, the method.
The method of claim 1,

X is determined based on a latency requirement, and

Method, where X determined based on the long delay requirement is greater than X determined based on the short delay requirement.
The method of claim 1,

X is determined based on the HARQ feedback option related to the MAC PDU,

The HARQ feedback option is either only a NACK feedback option or an ACK/NACK feedback option, and

wherein X determined based on the ACK/NACK feedback option is greater than X determined based on the only NACK feedback option.
The method of claim 1,

X is determined based on the period of the PSFCH resource, and

The method, wherein X determined based on the period of the large PSFCH resource is greater than X determined based on the period of the small PSFCH resource.
The method of claim 1,

Reporting information related to simultaneous processing capability for the PSFCH of the first device to the base station; further comprising,

X is determined based on the simultaneous processing capability for the PSFCH of the first device, and

wherein X determined based on the concurrent processing capability for the low PSFCH is greater than the X determined based on the concurrent processing capability for the high PSFCH.
The method of claim 1,

X is determined based on an error between a first synchronization related to Uu communication between the base station and the first device and a second synchronization related to SL communication between the first device and the second device, and

X determined based on a large error is greater than an X determined based on a small error, a method.
The method of claim 1,

Measuring a channel busy ratio (CBR) for the resource pool; and

Reporting the information on the CBR to the base station; further comprising,

X is determined based on the CBR, and

X determined based on a large CBR is smaller than an X determined based on a small CBR, the method.
The method of claim 1,

X is determined based on the cast type of the first device,

The cast type includes groupcast or unicast, and

X determined based on the groupcast is smaller than X determined based on the unicast.
The method of claim 1,

wherein the minimum time gap is less than or equal to a time gap between the UL resource and the PSFCH resource.
The method of claim 1,

The UL resource is associated with at least one PSFCH resource,

The PSFCH resource is the last PSFCH resource among the at least one PSFCH resource, and

Based on the minimum time gap being larger than the time gap between the UL resource and the PSFCH resource, the SL HARQ feedback related to the last PSFCH resource is not included in the SL HARQ feedback transmitted to the base station.
The method of claim 1,

Based on a plurality of PSFCHs having the same reception power detected on the PSFCH resource, it is determined that the SL HARQ feedback is NACK.
In the first device for performing wireless communication,

one or more memories storing instructions;

one or more transceivers; and

one or more processors coupling the one or more memories and the one or more transceivers, wherein the one or more processors execute the instructions,

Receive information related to an uplink (UL) resource for reporting sidelink (SL) hybrid automatic repeat request (HARQ) feedback to the base station from the base station;

transmit first sidelink control information (SCI) to the second device through a physical sidelink control channel (PSCCH);

transmit a second SCI and a MAC PDU (medium access control protocol data unit) to the second device through a physical sidelink shared channel (PSSCH) related to the PSCCH;

determine a physical sidelink feedback channel (PSFCH) resource based on the index of the slot and the index of the subchannel related to the PSSCH; and

Transmitting the SL HARQ feedback for the MAC PDU to the base station based on the UL resource,

The minimum time gap between the PSFCH resource and the UL resource is determined based on the numerology of N, X, SL BWP (bandwidth part), and UL BWP,

N is determined based on the minimum value among the pneumonology of the SL BWP and the pneumonology of the UL BWP, and

X is determined based on the information related to the priority, the first device.
An apparatus configured to control a first terminal, comprising:

one or more processors; and

one or more memories operably coupled by the one or more processors and storing instructions, wherein the one or more processors execute the instructions,

receiving information related to an uplink (UL) resource for reporting sidelink (SL) hybrid automatic repeat request (HARQ) feedback to the base station from the base station;

transmitting first sidelink control information (SCI) to the second terminal through a physical sidelink control channel (PSCCH);

transmitting a second SCI and a MAC PDU (medium access control protocol data unit) to the second terminal through a physical sidelink shared channel (PSSCH) related to the PSCCH;

determine a physical sidelink feedback channel (PSFCH) resource based on the index of the slot and the index of the subchannel related to the PSSCH; and

Transmitting the SL HARQ feedback for the MAC PDU to the base station based on the UL resource,

The minimum time gap between the PSFCH resource and the UL resource is determined based on the numerology of N, X, SL BWP (bandwidth part), and UL BWP,

N is determined based on the minimum value among the pneumonology of the SL BWP and the pneumonology of the UL BWP, and

X is determined based on information related to priority, the device.
A non-transitory computer-readable storage medium having recorded thereon instructions, comprising:

The instructions, when executed by one or more processors, cause the one or more processors to:

receive, by the first apparatus, information related to an uplink (UL) resource for reporting sidelink (SL) hybrid automatic repeat request (HARQ) feedback to the base station from the base station;

send, by the first device, first sidelink control information (SCI) to a second device through a physical sidelink control channel (PSCCH);

transmit, by the first device, a second SCI and a MAC medium access control protocol data unit (PDU) to the second device through a physical sidelink shared channel (PSSCH) related to the PSCCH;

determine, by the first device, a physical sidelink feedback channel (PSFCH) resource based on the index of the slot and the index of the subchannel related to the PSSCH; and

transmit, by the first device, the SL HARQ feedback for the MAC PDU to the base station based on the UL resource,

The minimum time gap between the PSFCH resource and the UL resource is determined based on the numerology of N, X, SL BWP (bandwidth part), and UL BWP,

N is determined based on the minimum value among the pneumonology of the SL BWP and the pneumonology of the UL BWP, and

X is a non-transitory computer-readable storage medium that is determined based on information related to the priority.
A method for a base station to perform wireless communication, the method comprising:

transmitting, to the first device, information related to an uplink (UL) resource for reporting sidelink (SL) hybrid automatic repeat request (HARQ) feedback to the base station; and

Receiving the SL HARQ feedback for a MAC PDU (medium access control protocol data unit) from the first device based on the UL resource;

The MAC PDU is transmitted by the first device to a second device through a physical sidelink control channel (PSSCH),

A physical sidelink feedback channel (PSFCH) resource is determined based on an index of a slot related to the PSSCH and an index of a subchannel,

The minimum time gap between the UL resource and the PSFCH resource is determined based on the numerology of N, X, SL BWP (bandwidth part), and the numonology of the UL BWP,

N is determined based on the minimum value among the pneumonology of the SL BWP and the pneumonology of the UL BWP, and

X is determined based on the information related to the priority, the method.
In the base station for performing wireless communication,

one or more memories storing instructions;

one or more transceivers; and

one or more processors coupling the one or more memories and the one or more transceivers, wherein the one or more processors execute the instructions,

transmit information related to an uplink (UL) resource for reporting sidelink (SL) hybrid automatic repeat request (HARQ) feedback to the base station to the first device; and

Receive the SL HARQ feedback for a MAC PDU (medium access control protocol data unit) from the first device based on the UL resource,

The MAC PDU is transmitted by the first device to a second device through a physical sidelink control channel (PSSCH),

A physical sidelink feedback channel (PSFCH) resource is determined based on an index of a slot related to the PSSCH and an index of a subchannel,

The minimum time gap between the UL resource and the PSFCH resource is determined based on the numerology of N, X, SL BWP (bandwidth part), and the numonology of the UL BWP,

N is determined based on the minimum value among the pneumonology of the SL BWP and the pneumonology of the UL BWP, and

X is determined based on information related to the priority, the base station.
In an apparatus configured to control a base station,

one or more processors; and

one or more memories operably coupled by the one or more processors and storing instructions, wherein the one or more processors execute the instructions,

transmit information related to an uplink (UL) resource for reporting sidelink (SL) hybrid automatic repeat request (HARQ) feedback to the base station to the first terminal; and

Receive the SL HARQ feedback for a MAC PDU (medium access control protocol data unit) from the first terminal based on the UL resource,

The MAC PDU is transmitted by the first terminal to the second terminal through a physical sidelink control channel (PSSCH),

A physical sidelink feedback channel (PSFCH) resource is determined based on an index of a slot related to the PSSCH and an index of a subchannel,

The minimum time gap between the UL resource and the PSFCH resource is determined based on the numerology of N, X, SL BWP (bandwidth part), and the numonology of the UL BWP,

N is determined based on the minimum value among the pneumonology of the SL BWP and the pneumonology of the UL BWP, and

X is determined based on information related to priority, the device.
A non-transitory computer-readable storage medium having recorded thereon instructions, comprising:

The instructions, when executed by one or more processors, cause the one or more processors to:

transmit, by the base station, information related to an uplink (UL) resource for reporting sidelink (SL) hybrid automatic repeat request (HARQ) feedback to the base station to the first device; and

Receive, by the base station, the SL HARQ feedback for a MAC PDU (medium access control protocol data unit) from the first device based on the UL resource,

The MAC PDU is transmitted by the first device to a second device through a physical sidelink control channel (PSSCH),

A physical sidelink feedback channel (PSFCH) resource is determined based on an index of a slot related to the PSSCH and an index of a subchannel,

The minimum time gap between the UL resource and the PSFCH resource is determined based on the numerology of N, X, SL BWP (bandwidth part), and the numonology of the UL BWP,

N is determined based on the minimum value among the pneumonology of the SL BWP and the pneumonology of the UL BWP, and

X is a non-transitory computer-readable storage medium that is determined based on information related to the priority.