Method and device for identifying transmission resources based on control information in NR V2X

Abstract

A method for performing wireless communication by a first device is proposed. The method may include the following steps: receiving a configuration authorization from a base station; sending a first physical sub-link control channel (PSCCH) or a first physical sub-link shared channel (PSSCH) to a second device through a first sub-link resource assigned by the configuration authorization; receiving a dynamic authorization from the base station through a physical downlink control channel (PDCCH), wherein the dynamic authorization includes index information of the configuration authorization related to the dynamic authorization; and resending the first PSCCH or the first PSSCH to the second device through a second sub-link resource assigned by the dynamic authorization based on the index information of the configuration authorization.

Description

Technical Field

[0001] The present disclosure relates to wireless communication systems. Background Art

[0002] Side Link (SL) communication is a communication scheme in which a direct link is established between User Equipments (UEs) and the UEs directly exchange voice and data with each other without intervention of an evolved Node B (eNB). SL communication is being considered as a solution to eNB overhead caused by the rapid growth of data traffic.

[0003] V2X (Vehicle to Everything) refers to the communication technology used by vehicles to exchange information with other vehicles, pedestrians, and objects equipped with infrastructure. V2X can be divided into four types such as V2V (Vehicle to Vehicle), V2I (Vehicle to Infrastructure), V2N (Vehicle to Network), and V2P (Vehicle to Pedestrian). V2X communication can be provided through the PC5 interface and / or the Uu interface.

[0004] In addition, as more and more communication devices require larger communication capacity, mobile broadband communication enhanced relative to traditional radio access technology (RAT) is required. Therefore, the design of communication systems taking into account UEs or services that are sensitive to reliability and latency has also been discussed, and the next generation radio access technology taking into account enhanced mobile broadband communication, massive MTC, and ultra-reliable low-latency communication (URLLC) can be referred to as a new RAT (radio access technology) or NR (new radio).

[0005] Figure 1 is a diagram for describing NR-based V2X communication compared with V2X communication based on a RAT used before NR. Figure 1 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0006] Regarding V2X communication, when discussing the RAT used before NR, the focus is on the scheme of providing safety services based on V2X messages such as BSM (Basic Safety Message), CAM (Cooperative Awareness Message) and DENM (Decentralized Environment Notification Message). V2X messages may include location information, dynamic information, attribute information, etc. For example, a UE may send a periodic message type CAM and / or an event-triggered message type DENM to another UE.

[0007] For example, CAM may include dynamic state information of the vehicle such as direction and speed, static data of the vehicle such as size, and basic vehicle information such as external lighting status, route details, etc. For example, UE may broadcast CAM, and the latency of CAM may be less than 100ms. For example, UE may generate DENM and send it to another UE in an unexpected situation such as vehicle failure, accident, etc. For example, all vehicles within the transmission range of UE can receive CAM and / or DENM. In this case, DENM may have a higher priority than CAM.

[0008] Since then, various V2X scenarios have been proposed in NR regarding V2X communication. For example, these various V2X scenarios may include vehicle platooning, advanced driving, extended sensors, remote driving, etc.

[0009] For example, based on vehicle platooning, vehicles can move together by dynamically forming groups. For example, in order to perform platooning operations based on vehicle platooning, vehicles belonging to the group can receive periodic data from the lead vehicle. For example, vehicles belonging to the group can reduce or increase the interval between vehicles by using the periodic data.

[0010] For example, based on advanced driving, the vehicles can be semi-autonomous or fully autonomous. For example, each vehicle can adjust trajectory or maneuver based on data obtained from local sensors of nearby vehicles and / or nearby logical entities. In addition, for example, each vehicle can share driving intentions with nearby vehicles.

[0011] For example, based on the extended sensors, raw data, processed data or real-time video data obtained by local sensors can be exchanged between the vehicle, the logical entity, the pedestrian UE and / or the V2X application server, so that, for example, the vehicle can recognize a further improved environment compared to the environment detected using its own sensors.

[0012] For example, based on remote driving, for a person or remote vehicle that cannot drive in a dangerous environment, a remote driver or V2X application can operate or control the remote vehicle. For example, if the route is predictable (such as public transportation), cloud computing-based driving can be used for the operation or control of the remote vehicle. In addition, for example, access to a cloud-based backend service platform can be considered for remote driving.

[0013] In addition, schemes for specifying service requirements for various V2X scenarios such as vehicle platooning, advanced driving, extended sensors, remote driving, etc. are discussed in NR-based V2X communications. Summary of the invention

[0014] Technical Purpose

[0015] In addition, additional retransmission resources may be allocated from the base station to the transmitting UE via Mode 1 dynamic grant (DG) downlink control information (DCI). In this case, if the transmitting UE receives a Mode 1 DG DCI from the base station, the transmitting UE needs to clearly identify which (which) periodic resources of the Mode 1 configuration grant (CG) the additional retransmission resources allocated by the received Mode 1 DG DCI are associated with.

[0016] Technical Solution

[0017] In one embodiment, a method for performing wireless communication by a first device is provided. The method may include the following steps: receiving a configuration authorization from a base station; sending a first physical sub-link control channel (PSCCH) or a first physical sub-link shared channel (PSSCH) to a second device through a first sub-link resource allocated by the configuration authorization; receiving a dynamic authorization from the base station through a physical downlink control channel (PDCCH), wherein the dynamic authorization includes index information of the configuration authorization related to the dynamic authorization; and resending the first PSCCH or the first PSSCH to the second device through a second sub-link resource allocated by the dynamic authorization based on the index information of the configuration authorization.

[0018] Effects of the present disclosure

[0019] The user equipment (UE) can efficiently perform SL communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a diagram for describing NR-based V2X communication compared with V2X communication based on a RAT used before NR.

[0021] Figure 2 The structure of the NR system according to an embodiment of the present disclosure is shown.

[0022] Figure 3 The functional division between NG-RAN and 5GC according to an embodiment of the present disclosure is shown.

[0023] Figure 4 A radio protocol architecture according to an embodiment of the present disclosure is shown.

[0024] Figure 5 The structure of the NR system according to an embodiment of the present disclosure is shown.

[0025] Figure 6 The structure of the time slot of the NR frame according to an embodiment of the present disclosure is shown.

[0026] Figure 7 An example of a BWP according to an embodiment of the present disclosure is shown.

[0027] Figure 8 A radio protocol architecture for SL communication according to an embodiment of the present disclosure is shown.

[0028] Fig. 9 A UE performing V2X or SL communication according to an embodiment of the present disclosure is shown.

[0029] Fig.10 A process of performing V2X or SL communication by a UE based on a transmission mode according to an embodiment of the present disclosure is shown.

[0030] Fig.11 Three broadcast types are shown according to embodiments of the present disclosure.

[0031] Fig.12 A synchronization source or synchronization reference of V2X according to an embodiment of the present disclosure is shown.

[0032] Fig.13 An example is shown in which the transmitting UE reports HARQ feedback information to the base station if the transmitting UE fails in any periodic sub-link information transmission.

[0033] Fig.14 A process in which a transmitting UE identifies a location of a transmitting resource based on control information according to an embodiment of the present disclosure is shown.

[0034] Fig.15 An example is shown in which a transmitting UE according to an embodiment of the present disclosure performs TB transmission or new TB transmission by using mode 1 CG resources in different cycles or adjacent cycles.

[0035] Fig.16 An example is shown in which a sending UE performs secondary link retransmission based on index information of a CG through resources allocated by a DG based on an embodiment of the present disclosure.

[0036] Fig.17 An example is shown in which a sending UE determines CG resources related to a DG based on CG index information according to an embodiment of the present disclosure.

[0037] Fig.18 A method in which a first device performs sub-link retransmission to a second device based on index information of a CG through resources allocated by a DG according to an embodiment of the present disclosure is shown.

[0038] Fig.19 A method in which a second device receives sub-link information from a first device through resources allocated by a DG based on index information of a CG according to an embodiment of the present disclosure is shown.

[0039] Fig. 20A method is shown in which a first device performs sub-link synchronization based on an embodiment of the present disclosure and performs sub-link retransmission to a second device through resources allocated by a DG based on index information of a CG.

[0040] Fig.21 A communication system 1 according to an embodiment of the present disclosure is shown.

[0041] Fig. 22 A wireless device according to an embodiment of the present disclosure is shown.

[0042] Fig.23 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown.

[0043] Fig.24 Another example of a wireless device according to an embodiment of the present disclosure is shown.

[0044] Fig.25 A handheld device according to an embodiment of the present disclosure is shown.

[0045] Fig.26 A vehicle or autonomous vehicle according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0046] In this specification, "A or B" may mean "only A", "only B", or "both A and B". In other words, in this specification, "A or B" may be interpreted as "A and / or B". For example, in this specification, "A, B or C" may mean "only A", "only B", "only C", or "any combination of A, B, C".

[0047] A slash ( / ) or a comma used in this specification may mean "and / or". For example, "A / B" may mean "A and / or B". Thus, "A / B" may mean "only A", "only B", or "both A and B". For example, "A, B, C" may mean "A, B, or C".

[0048] In the present specification, "at least one of A and B" may mean "only A", "only B", or "both A and B". In addition, in the present specification, the expression "at least one of A or B" or "at least one of A and / or B" may be interpreted as "at least one of A and B".

[0049] In addition, in the present specification, "at least one of A, B, and C" may mean "only A", "only B", "only C", or "any combination of A, B, and C". In addition, "at least one of A, B, or C" or "at least one of A, B and / or C" may mean "at least one of A, B, and C".

[0050] In addition, brackets used in this specification may mean "for example". Specifically, when indicated as "control information (PDCCH)", this may mean that "PDCCH" is proposed as an example of "control information". In other words, the "control information" of this specification is not limited to "PDCCH", and "PDDCH" may be proposed as an example of "control information". Specifically, when indicated as "control information (ie, PDCCH)", this may also mean that "PDCCH" is proposed as an example of "control information".

[0051] The technical features described in each of the drawings in this specification may be implemented separately or simultaneously.

[0052] The techniques described below can be used in various wireless communication systems such as 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. CDMA can be implemented using radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA-2000. TDMA can be implemented using radio technologies such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA can be implemented using radio technologies such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Evolved UTRA (E-UTRA), etc. IEEE 802.16m is an evolved version of IEEE 802.16e and provides backward compatibility for systems based on IEEE 802.16e. UTRA is part of Universal Mobile Telecommunications System (UMTS). 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a part of Evolved UMTS (E-UMTS) using E-UTRA. 3GPP LTE uses OFDMA in the downlink and SC-FDMA in the uplink. LTE-Advanced (LTE-A) is an evolution of LTE.

[0053] 5G NR is a subsequent technology of LTE-A corresponding to a new mobile communication system with high performance, low latency, high availability, etc. 5G NR can use all available spectrum resources including low frequency bands less than 1 GHz, intermediate frequency bands from 1 GHz to 10 GHz, and high frequency (millimeter wave) above 24 GHz.

[0054] For the sake of clarity, the following description will mainly focus on LTE-A or 5G NR. However, the technical features of the embodiments of the present disclosure will not be limited thereto.

[0055] Figure 2 The structure of the NR system according to an embodiment of the present disclosure is shown. Figure 2 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0056] Reference Figure 2 , the next generation radio access network (NG-RAN) may include a BS 20 that provides user plane and control plane protocol terminations to the UE 10. For example, the BS 20 may include a next generation Node B (gNB) and / or an evolved Node B (eNB). For example, the UE 10 may be fixed or mobile and may be referred to as other terms such as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), a wireless device, etc. For example, the BS may be referred to as a fixed station that communicates with the UE 10 and may be referred to as other terms such as a base transceiver system (BTS), an access point (AP), etc.

[0057] Figure 2 The embodiment of the present invention illustrates a case where only gNB is included. BS20 may be connected to each other via an Xn interface. BS20 may be connected to each other via a fifth generation (5G) core network (5GC) and an NG interface. More specifically, BS20 may be connected to an access and mobility management function (AMF) 30 via an NG-C interface, and may be connected to a user plane function (UPF) 30 via an NG-U interface.

[0058] Figure 3 The functional division between NG-RAN and 5GC according to an embodiment of the present disclosure is shown.

[0059] Reference Figure 3 , gNB can provide functions such as inter-cell radio resource management (inter-cell RRM), radio bearer (RB) control, connection mobility control, radio admission control, measurement configuration and provision, dynamic resource allocation, etc. AMF can provide functions such as non-access stratum (NAS) security, idle state mobility processing, etc. UPF can provide functions such as mobility anchoring, protocol data unit (PDU) processing, etc. Session management function (SMF) can provide functions such as user equipment (UE) Internet protocol (IP) address allocation, PDU session control, etc.

[0060] The radio interface protocol layer between the UE and the network can be classified into the first layer (L1), the second layer (L2), and the third layer (L3) based on the lower three layers of the open system interconnection (OSI) model known in the communication system. Here, the physical (PHY) layer belonging to the first layer provides an information transmission service using a physical channel, and the radio resource control (RRC) layer located at the third layer controls radio resources between the UE and the network. To this end, the RRC layer exchanges RRC messages between the UE and the BS layer.

[0061] Figure 4 A radio protocol architecture according to an embodiment of the present disclosure is shown. Figure 4 The embodiments of can be combined with various embodiments of the present disclosure. Specifically, Figure 4 (a) shows the radio protocol architecture for the user plane, and Figure 4 (b) in FIG. 4 shows a radio protocol architecture for a control plane. The user plane corresponds to a protocol stack for user data transmission, and the control plane corresponds to a protocol stack for control signal transmission.

[0062] Reference Figure 4 , the physical layer provides information transfer services to the upper layer through the physical channel. The physical layer is connected to the medium access control (MAC) layer, which is the upper layer of the physical layer, through the transport channel. Data is transferred between the MAC layer and the physical layer through the transport channel. The transport channel is classified according to how the data is transmitted through the radio interface and what characteristics of the data it transmits.

[0063] Data is transmitted through a physical channel between different PHY layers (ie, a PHY layer of a transmitter and a PHY layer of a receiver). The physical channel may be modulated using an Orthogonal Frequency Division Multiplexing (OFDM) scheme, and uses time and frequency as radio resources.

[0064] The MAC layer provides services to the Radio Link Control (RLC) layer via logical channels, and the RLC layer is a higher layer of the MAC layer. The MAC layer provides a function of mapping multiple logical channels to multiple transport channels. The MAC layer also provides a function of logical channel multiplexing by mapping multiple logical channels to a single transport channel. The MAC layer provides data transmission services through logical channels.

[0065] The RLC layer performs concatenation, segmentation, and reassembly of Radio Link Control Service Data Units (RLC SDUs). In order to ensure different Quality of Service (QoS) required by Radio Bearers (RBs), the RLC layer provides three types of operation modes, namely, Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM). AM RLC provides error correction through Automatic Repeat Request (ARQ).

[0066] The Radio Resource Control (RRC) layer is defined only in the control plane. And, the RRC layer performs the function of controlling physical channels, transport channels, and logical channels related to configuration, reconfiguration, and release of radio bearers. RB refers to a logical path provided by the first layer (i.e., the PHY layer) and the second layer (i.e., the MAC layer, the RLC layer, and the PDCP layer) to transmit data between the UE and the network.

[0067] The functions of the Packet Data Convergence Protocol (PDCP) in the user plane include transmission, header compression and encryption of user data. The functions of the Packet Data Convergence Protocol (PDCP) in the control plane include transmission and encryption / integrity protection of control plane data.

[0068] The Service Data Adaptation Protocol (SDAP) layer is defined only in the user plane. The SDAP layer performs mapping between Quality of Service (QoS) flows and Data Radio Bearers (DRBs) and QoS Flow ID (QFI) marking in both DL and UL packets.

[0069] Configuration of RB refers to the process for specifying radio protocol layers and channel attributes to provide a specific service and for determining corresponding detailed parameters and operation methods. RB can then be classified into two types, namely, signaling radio bearer (SRB) and data radio bearer (DRB). SRB is used as a path for sending RRC messages in the control plane, and DRB is used as a path for sending user data in the user plane.

[0070] When the RRC connection is established between the RRC layer of the UE and the RRC layer of the E-UTRAN, the UE is in the RRC connected (RRC_CONNECTED) state, otherwise the UE can be in the RRC idle (RRC_IDLE) state. In the case of NR, the RRC inactive (RRC_INACTIVE) state is additionally defined, and the UE in the RRC_INACTIVE state can maintain the connection with the core network and release its connection with the BS.

[0071] The downlink transmission channels for sending (or transmitting) data from the network to the UE include a broadcast channel (BCH) for sending system information and a downlink shared channel (SCH) for sending other user services or control messages. The services or control messages of downlink multicast or broadcast services can be sent via the downlink SCH or can be sent via a separate downlink multicast channel (MCH). In addition, the uplink transmission channels for sending (or transmitting) data from the UE to the network include a random access channel (RACH) for sending initial control messages and an uplink shared channel (SCH) for sending other user services or control messages.

[0072] Examples of logical channels belonging to a higher layer of a transport channel and mapped to a transport channel may include a broadcast control channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), a multicast control channel (MCCH), a multicast traffic channel (MTCH), etc.

[0073] The physical channel is configured by multiple OFDM symbols in the time domain and multiple subcarriers in the frequency domain. A subframe is configured by multiple OFDM symbols in the time domain. A resource block is configured by multiple subcarriers and multiple OFDM symbols in a resource allocation unit. In addition, each subframe can use a specific subcarrier of a specific OFDM symbol (e.g., the first OFDM symbol) of the corresponding subframe of the physical downlink control channel (PDCCH), i.e., the L1 / L2 control channel. The transmission time interval (TTI) refers to the unit time of subframe transmission.

[0074] Figure 5 The structure of the NR system according to an embodiment of the present disclosure is shown. Figure 5 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0075] Reference Figure 5 In NR, a radio frame can be used to perform uplink and downlink transmissions. The length of a radio frame is 10ms and can be defined as consisting of two half frames (HF). A half frame can include five 1ms subframes (SF). A subframe (SF) can be divided into one or more time slots, and the number of time slots within a subframe can be determined according to the subcarrier spacing (SCS). Each time slot can include 12 or 14 OFDM (A) symbols depending on the cyclic prefix (CP).

[0076] When a normal CP is used, each time slot may include 14 symbols. When an extended CP is used, each time slot may include 12 symbols. Herein, a symbol may include an OFDM symbol (or a CP-OFDM symbol) and a single carrier-FDMA (SC-FDMA) symbol (or a discrete Fourier transform spread OFDM (DFT-s-OFDM) symbol).

[0077] Table 1 below shows the number of time slots (N) of each symbol according to the SCS setting (μ) when the normal CP is used. slot symb ), the number of time slots per frame (N frame,μ slot ) and the number of time slots per subframe (N subframe,μ slot ).

[0078] [Table 1]

[0079] <![CDATA[SCS(15*2 μ )]]> <![CDATA[N slot symb ]]> <![CDATA[N frame,μ slot ]]> <![CDATA[N subframe,μ slot ]]> 15KHz(μ=0) 14 10 1 30KHz(μ=1) 14 20 2 60KHz(μ=2) 14 40 4 120KHz(μ=3) 14 80 8 240KHz(μ=4) 14 160 16

[0080] Table 2 shows an example of the number of symbols per slot, the number of slots per frame, and the number of slots per subframe according to the SCS in the case of using the extended CP.

[0081] [Table 2]

[0082] <![CDATA[SCS(15*2 μ )]]> <![CDATA[N slot symb ]]> <![CDATA[N frame,μ slot ]]> <![CDATA[N subframe,μ slot ]]> 60KHz(μ=2) 12 40 4

[0083] In the NR system, OFDM (A) parameter sets (e.g., SCS, CP length, etc.) between multiple cells integrated into one UE may be configured differently. Therefore, the (absolute time) duration (or interval) of a time resource (e.g., a subframe, a time slot, or a TTI) (collectively referred to as a time unit (TU) for simplicity) consisting of the same number of symbols may be configured differently in the integrated cells.

[0084] In NR, multiple parameter sets or SCSs can be supported to support various 5G services. For example, with an SCS of 15kHz, a wide range of traditional cellular bands can be supported, and with an SCS of 30kHz / 60kHz, dense cities, lower latency, and wider carrier bandwidths can be supported. With an SCS of 60kHz or higher, bandwidths greater than 24.25GHz can be used to overcome phase noise.

[0085] The NR frequency band may be defined as two different types of frequency ranges. The two different types of frequency ranges may be FR1 and FR2. The values ​​of the frequency ranges may be changed (or varied), for example, the two different types of frequency ranges may be as shown in Table 3 below. Among the frequency ranges used in the NR system, FR1 may mean "a range below 6 GHz", and FR2 may mean "a range above 6 GHz", and may also be referred to as millimeter wave (mmW).

[0086] [Table 3]

[0087] Frequency range specification Corresponding frequency range Subcarrier Spacing (SCS) FR1 450MHz-6000MHz 15, 30, 60kHz FR2 24250MHz-52600MHz 60, 120, 240kHz

[0088] As described above, the value of the frequency range in the NR system may be changed (or varied). For example, as shown in Table 4 below, FR1 may include a bandwidth in the range of 410 MHz to 7125 MHz. More specifically, FR1 may include frequency bands of 6 GHz (or 5850, 5900, 5925 MHz, etc.) and higher. For example, the frequency bands of 6 GHz (or 5850, 5900, 5925 MHz, etc.) and higher included in FR1 may include unlicensed frequency bands. Unlicensed frequency bands may be used for various purposes, for example, unlicensed frequency bands are used for vehicle-specific communications (e.g., autonomous driving).

[0089] [Table 4]

[0090] Frequency range specification Corresponding frequency range Subcarrier Spacing (SCS) FR1 410MHz-7125MHz 15, 30, 60kHz FR2 24250MHz-52600MHz 60, 120, 240kHz

[0091] Figure 6 The structure of the time slot of the NR frame according to an embodiment of the present disclosure is shown.

[0092] Reference Figure 6 , a time slot includes multiple symbols in the time domain. For example, in the case of normal CP, one time slot may include 14 symbols. For example, in the case of extended CP, one time slot may include 12 symbols. Alternatively, in the case of normal CP, one time slot may include 7 symbols. However, in the case of extended CP, one time slot may include 6 symbols.

[0093] A carrier includes multiple subcarriers in the frequency domain. A resource block (RB) can be defined as multiple consecutive subcarriers in the frequency domain (e.g., 12 subcarriers). A bandwidth part (BWP) can be defined as multiple consecutive (physical) resource blocks ((P)RBs) in the frequency domain, and a BWP can correspond to a parameter set (e.g., SCS, CP length, etc.). A carrier can include up to N BWPs (e.g., 5 BWPs). Data communication can be performed via an activated BWP. Each element can be referred to as a resource element (RE) in a resource grid, and a complex symbol can be mapped to each element.

[0094] In addition, the radio interface between a UE and another UE or the radio interface between a UE and a network may include an L1 layer, an L2 layer, and an L3 layer. In various embodiments of the present disclosure, the L1 layer may refer to a physical layer. In addition, for example, the L2 layer may refer to at least one of a MAC layer, an RLC layer, a PDCP layer, and an SDAP layer. In addition, for example, the L3 layer may refer to an RRC layer.

[0095] Hereinafter, the bandwidth part (BWP) and the carrier will be described in detail.

[0096] A BWP may be a contiguous set of physical resource blocks (PRBs) within a given parameter set. A PRB may be selected from a contiguous set of common resource blocks (CRBs) for a given parameter set on a given carrier.

[0097] When bandwidth adaptation (BA) is used, the reception bandwidth and transmission bandwidth of the user equipment (UE) are not required to be as wide (or large) as the bandwidth of the cell, and the reception bandwidth and transmission bandwidth of the UE can be controlled (or adjusted). For example, the UE can receive information / configuration for bandwidth control (or adjustment) from the network / base station. In this case, bandwidth control (or adjustment) can be performed based on the received information / configuration. For example, bandwidth control (or adjustment) can include a reduction / expansion of bandwidth, a change in the position of bandwidth, or a change in the subcarrier spacing of bandwidth.

[0098] For example, the bandwidth can be reduced during a duration with little activity in order to save power. For example, the location of the bandwidth can be relocated (or moved) from the frequency domain. For example, the location of the bandwidth can be relocated (or moved) from the frequency domain to enhance scheduling flexibility. For example, the subcarrier spacing of the bandwidth can be changed. For example, the subcarrier spacing of the bandwidth can be changed to authorize different services. A subset of the total cell bandwidth of a cell can be referred to as a bandwidth part (BWP). BA can be performed when the base station / network configures a BWP for the UE and when the base station / network notifies the UE of the BWP that is currently activated among the BWPs.

[0099] For example, the BWP may be one of an activated BWP, an initial BWP, and / or a default BWP. For example, the UE cannot monitor the downlink radio link quality in a DL BWP other than an activated DL BWP within a primary cell (PCell). For example, the UE cannot receive PDCCH, PDSCH, or CSI-RS (except RRM) from outside an activated DL BWP. For example, the UE cannot trigger a channel state information (CSI) report for an unactivated DL BWP. For example, the UE cannot send PUCCH or PUSCH from outside an unactivated DL BWP. For example, in the case of a downlink, the initial BWP may be given as a continuous RB set for an RMSI CORESET (configured by PBCH). For example, in the case of an uplink, an initial BWP may be given by the SIB for a random access procedure. For example, a default BWP may be configured by a higher layer. For example, the initial value of the default BWP may be an initial DL BWP. In order to save energy, if the UE fails to detect DCI within a predetermined time period, the UE may switch the UE's activated BWP to a default BWP.

[0100] In addition, a BWP can be defined for SL. The same SL BWP can be used for transmission and reception. For example, a transmitting UE can send a SL channel or a SL signal within a specific BWP, and a receiving UE can receive a SL channel or a SL signal within the same specific BWP. In a licensed carrier, the SL BWP can be defined separately from the Uu BWP, and the SLBWP can have configuration signaling separate from the Uu BWP. For example, the UE can receive a configuration for the SL BWP from the base station / network. The SL BWP can be configured (in advance) for out-of-coverage NR V2X UEs and RRC_IDLE UEs. For UEs operating in RRC_CONNECTED mode, at least one SL BWP can be activated within the carrier.

[0101] Figure 7 An example of a BWP according to an embodiment of the present disclosure is shown. Figure 7 The embodiments of can be combined with various embodiments of the present disclosure. Figure 7 In an implementation manner, the number of BWPs is 3.

[0102] Reference Figure 7 , a common resource block (CRB) may be a carrier resource block numbered from one end of a carrier frequency band to the other end thereof. Additionally, a PRB may be a resource block numbered within each BWP. Point A may indicate a common reference point of a resource block grid.

[0103] It can be obtained by point A, the offset relative to point A (N start BWP ) and bandwidth (N size BWP ) to configure the BWP. For example, point A may be an external reference point of the PRBs of the carrier, and subcarrier 0 of all parameter sets (e.g., all parameter sets supported by the network on the corresponding carrier) are aligned in point A. For example, the offset may be the PRB distance between the lowest subcarrier within a given parameter set and point A. For example, the bandwidth may be the number of PRBs within a given parameter set.

[0104] Hereinafter, V2X or SL communication will be described.

[0105] Figure 8 A radio protocol architecture for SL communication according to an embodiment of the present disclosure is shown. Figure 8 The embodiments of can be combined with various embodiments of the present disclosure. More specifically, Figure 8 (a) in FIG. 1 shows a user plane protocol stack, and Figure 8 (b) in FIG. 5 shows the control plane protocol stack.

[0106] Next, the sub-link synchronization signal (SLSS) and the synchronization information will be described in detail.

[0107] The SLSS may include a primary sublink synchronization signal (PSSS) and a secondary sublink synchronization signal (SSSS) as SL specific sequences. The PSSS may be referred to as a secondary link primary synchronization signal (S-PSS), and the SSSS may be referred to as a secondary link secondary synchronization signal (S-SSS). For example, an M sequence of length 127 may be used for the S-PSS, and a Gold sequence of length 127 may be used for the S-SSS. For example, the UE may use the S-PSS for initial signal detection and synchronization acquisition. For example, the UE may use the S-PSS and the S-SSS for acquiring detailed synchronization and for detecting the synchronization signal ID.

[0108] The physical sidelink broadcast channel (PSBCH) can be a (broadcast) channel for sending default (system) information, which must be known by the UE before SL signal transmission / reception. For example, the default information can be information related to SLSS, duplex mode (DM), time division duplex (TDD) uplink / downlink (UL / DL) configuration, information related to resource pool, type of application related to SLSS, subframe offset, broadcast information, etc. For example, in order to evaluate PSBCH performance, in NR V2X, the payload size of PSBCH can be 56 bits, including 24-bit CRC.

[0109] S-PSS, S-SSS, and PSBCH may be included in a block format that supports periodic transmission (e.g., SL synchronization signal (SS) / PSBCH block, hereinafter, sublink synchronization signal block (S-SSB)). The S-SSB may have the same parameter set (i.e., SCS and CP length) as the physical sublink control channel (PSCCH) / physical sublink shared channel (PSSCH) in the carrier, and the transmission bandwidth may exist within a (pre) configured sublink (SL) BWP. For example, the S-SSB may have a bandwidth of 11 resource blocks (SBs). For example, the PSBCH may exist across 11 RBs. In addition, the frequency position of the S-SSB may be (pre) configured. Therefore, the UE does not have to perform hypothesis detection at the frequency to discover the S-SSB in the carrier.

[0110] Fig. 9 A UE performing V2X or SL communication according to an embodiment of the present disclosure is shown. Fig. 9 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0111] Reference Fig. 9In V2X or SL communication, the term "UE" may generally refer to a user's UE. However, if a network device such as a BS transmits / receives a signal according to a communication scheme between UEs, the BS may also be regarded as a type of UE. For example, UE 1 may be a first device 100, and UE 2 may be a second device 200.

[0112] For example, UE 1 may select a resource unit corresponding to a specific resource in a resource pool meaning a set of resource series. In addition, UE 1 may send an SL signal by using the resource unit. For example, a resource pool in which UE 1 can send a signal may be configured to UE 2 as a receiving UE, and a signal of UE 1 may be detected in the resource pool.

[0113] Herein, if UE 1 is within the connection range of the BS, the BS may inform the resource pool to UE 1. Otherwise, if UE 1 is out of the connection range of the BS, another UE may inform UE 1 of the resource pool, or UE 1 may use a pre-configured resource pool.

[0114] Generally, a resource pool may be configured in units of multiple resources, and each UE may select one or more units of resources to use in its SL signaling.

[0115] Hereinafter, resource allocation in SL will be described.

[0116] Fig.10 A process of performing V2X or SL communication by a UE based on a transmission mode according to an embodiment of the present disclosure is shown. Fig.10 The embodiments of the present disclosure 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 ease of explanation, in LTE, the transmission mode may be referred to as an LTE transmission mode. In NR, the transmission mode may be referred to as an NR resource allocation mode.

[0117] For example, Fig.10 (a) in FIG. 1 shows UE operations related to LTE transmission mode 1 or LTE transmission mode 3. Alternatively, for example, Fig.10 (a) in FIG. 1 shows UE operations related to NR resource allocation mode 1. For example, LTE transmission mode 1 may be applied to conventional SL communication, and LTE transmission mode 3 may be applied to V2X communication.

[0118] For example, Fig.10 (b) in FIG. 4 shows UE operations related to LTE transmission mode 2 or LTE transmission mode 4. Alternatively, for example, Fig.10 (b) in FIG. 1 shows UE operation related to NR resource allocation mode 2.

[0119] Reference Fig.10 In (a), in LTE transmission mode 1, LTE transmission mode 3, or NR resource allocation mode 1, the BS may schedule SL resources to be used by the UE for SL transmission. For example, the BS may perform resource scheduling for UE 1 through PDCCH (more specifically, downlink control information (DCI)), and UE 1 may perform V2X or SL communication for UE 2 according to the resource scheduling. For example, UE 1 may send sidelink control information (SCI) to UE 2 through a physical sidelink control channel (PSCCH), and thereafter send data based on the SCI to UE 2 through a physical sidelink shared channel (PSSCH).

[0120] Reference Fig.10 In (b), in LTE transmission mode 2, LTE transmission mode 4 or NR resource allocation mode 2, the UE can determine the SL transmission resources within the SL resources configured by the BS / network or the pre-configured SL resources. For example, the configured SL resources or the pre-configured SL resources can be a resource pool. For example, the UE can autonomously select or schedule resources for SL transmission. For example, the UE can perform SL communication by autonomously selecting resources in the configured resource pool. For example, the UE can autonomously select resources within the selection window by performing sensing and resource (re)selection processes. For example, sensing can be performed in units of subchannels. In addition, UE 1 that has autonomously selected resources in the resource pool can send SCI to UE 2 via PSCCH, and thereafter data based on the SCI can be sent to UE 2 via PSSCH.

[0121] Fig.11 Three types of broadcasts are shown in accordance with embodiments of the present disclosure. Fig.11 The embodiments of can be combined with various embodiments of the present disclosure. Specifically, Fig.11 (a) shows broadcast type SL communication, Fig.11 (b) in FIG. 4 shows unicast type SL communication, and Fig.11 (c) shows multicast SL communication. In the case of unicast SL communication, the UE can perform one-to-one communication with another UE. In the case of multicast SL transmission, the UE can perform SL communication with one or more UEs in the group to which the UE belongs. In various embodiments of the present disclosure, SL groupcast communication can be replaced by SL multicast communication, SL one-to-many communication, etc.

[0122] Fig.12 A synchronization source or synchronization reference of V2X according to an embodiment of the present disclosure is shown. Fig.12 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0123] refer to Fig.12 In V2X, the UE can synchronize directly with the Global Navigation Satellite System (GNSS), or can synchronize indirectly with the GNSS through a UE that synchronizes directly with the GNSS (within or outside the network coverage). If the GNSS is configured as a synchronization source, the UE can calculate the Direct Frame Number (DFN) and subframe number by using the Coordinated Universal Time (UTC) and a (pre-)configured Direct Frame Number (DFN) offset.

[0124] Alternatively, the UE may be synchronized directly with the BS, or may be synchronized with another UE that is time / frequency synchronized with the BS. For example, the BS may be an eNB or a gNB. For example, when the UE is within network coverage, the UE may receive synchronization information provided by the BS and may be synchronized directly with the BS. Thereafter, the UE may provide synchronization information to another adjacent UE. If the BS timing is configured based on synchronization, the UE may rely on a cell associated with the corresponding frequency (when it is within cell coverage at that frequency) or a primary cell or serving cell (when it is outside cell coverage at that frequency) for synchronization and downlink measurements.

[0125] The BS (e.g., serving cell) may provide a synchronization configuration for a carrier used for V2X or SL communication. In this case, the UE may conform to the synchronization configuration received from the BS. If the UE cannot detect any cell in the carrier used for V2X or SL communication and cannot receive a synchronization configuration from the serving cell, the UE may conform to the pre-configured synchronization configuration.

[0126] Alternatively, the UE may be synchronized with another UE that cannot obtain synchronization information directly or indirectly from the BS or GNSS. The synchronization source or preference may be pre-configured for the UE. Alternatively, the synchronization source and preference may be configured through a control message provided by the BS.

[0127] The SL synchronization source may be associated / correlated with the synchronization priority. For example, the relationship between the synchronization source and the synchronization priority may be defined as shown in Table 5 or Table 6. Table 5 or Table 6 is for exemplary purposes only, and the relationship between the synchronization source and the synchronization priority may be defined in various forms.

[0128] [Table 5]

[0129] Priority Level GNSS-based synchronization eNB / gNB-based synchronization P0 GNSS BS P1 All UEs synchronized directly with GNSS All UEs synchronized directly with the BS P2 All UEs that are indirectly synchronized with GNSS All UEs that are indirectly synchronized with the BS P3 All other UEs GNSS P4 N / A All UEs synchronized directly with GNSS P5 N / A All UEs that are indirectly synchronized with GNSS P6 N / A All other UEs

[0130] [Table 6]

[0131] Priority Level GNSS-based synchronization eNB / gNB-based synchronization P0 GNSS BS P1 All UEs synchronized directly with GNSS All UEs synchronized directly with the BS P2 All UEs that are indirectly synchronized with GNSS All UEs that are indirectly synchronized with the BS P3 BS GNSS P4 All UEs synchronized directly with the BS All UEs synchronized directly with GNSS P5 All UEs that are indirectly synchronized with the BS All UEs that are indirectly synchronized with GNSS P6 Other UEs with low priority Other UEs with low priority

[0132] In Table 5 or Table 6, P0 may represent the highest priority, and P6 may represent the lowest priority. In Table 5 or Table 6, the BS may include at least one of a gNB and an eNB.

[0133] It may be (pre-)configured whether GNSS based synchronization or BS based synchronization is used.In single carrier operation, the UE may derive the UE's transmit timing from the highest priority available synchronization reference.

[0134] In addition, in the present disclosure, for example, a transmitting UE (TX UE) may be a UE that transmits data to a (target) receiving UE (RX UE). For example, the TX UE may be a UE that performs PSCCH transmission and / or PSSCH transmission. Additionally / alternatively, for example, the TX UE may be a UE that sends a SL CSI-RS and / or a SL CSI report request indicator to a (target) RX UE. Additionally / alternatively, for example, the TX UE may be a UE that sends a (control) channel (e.g., PSCCH, PSSCH, etc.) and / or a reference signal on a (control) channel (e.g., DM-RS, CSI-RS, etc.) for SL RLM operation and / or SLRLF operation of a (target) RX UE.

[0135] In addition, in the present disclosure, for example, a receiving UE (RX UE) may be a UE that sends SL HARQ feedback to a transmitting UE (TX UE) based on whether decoding of data received from the TX UE is successful and / or detection / decoding of a PSCCH (related to PSSCH scheduling) sent by the TX UE is successful. Additionally / alternatively, for example, the RX UE may be a UE that performs SL CSI transmission to the TX UE based on a SL CSI-RS and / or a SL CSI report request indicator received from the TX UE. Additionally / alternatively, for example, the RX UE is a UE that sends to the TX UE a SL (L1) RSRP measurement value measured based on a (predefined) reference signal and / or a SL (L1) reference signal received power (RSRP) report request indicator received from the TX UE. Additionally / alternatively, for example, the RX UE may be a UE that sends data of the RX UE to the TX UE. Additionally / alternatively, for example, the RX UE may be a UE that performs SLRLM operation and / or SL RLF operation based on a (pre-configured) (control) channel and / or a reference signal on a (control) channel received from the TX UE.

[0136] In addition, in the present disclosure, for example, in the case where the RX UE sends SL HARQ feedback information for the PSSCH and / or PSCCH received from the TX UE, the following options or some of the following options may be considered. Herein, for example, the following options or some of the following options may be restrictedly applied only if the RX UE successfully decodes / detects the PSCCH that schedules the PSSCH.

[0137] (1) Multicast HARQ feedback option 1: NACK information can be sent to the TX UE only if the RX UE fails to decode / receive the PSSCH received from the TX UE.

[0138] (2) Multicast HARQ feedback option 2: If the RX UE successfully decodes / receives the PSSCH received from the TX UE, ACK information may be sent to the TX UE, and if the RX UE fails to decode / receive the PSSCH, NACK information may be sent to the TX UE.

[0139] In addition, in the present disclosure, for example, the TX UE may send the following information or some of the following information to the RX UE through the SCI. Herein, for example, the TX UE may send some or all of the following information to the RX UE through the first SCI and / or the second SCI.

[0140] -PSSCH (and / or PSCCH) related resource allocation information (e.g., location / number of time / frequency resources, resource reservation information (e.g., period))

[0141] -SL CSI report request indicator or SL (L1) reference signal received power (RSRP) (and / or SL (L1) reference signal received quality (RSRQ) and / or SL (L1) reference signal strength indicator (RSSI)) report request indicator

[0142] - (on PSSCH) SL CSI transmission indicator (or SL (L1) RSRP (and / or SL (L1) RSRQ and / or SL (L1) RSSI) information transmission indicator

[0143] - Modulation and Coding Scheme (MCS) information

[0144] -TX power information

[0145] - L1 destination ID information and / or L1 source ID information

[0146] -SL HARQ process ID information

[0147] -New Data Indicator (NDI) information

[0148] - Redundancy Version (RV) information

[0149] -QoS information (for example, priority information) (related to the transmission service / packet)

[0150] - Information on the number of antenna ports used for (transmitting) SL CSI-RS or SL CSI-RS transmission indicator

[0151] - The location (or distance range) information of the target RX UE (for which SL HARQ feedback is requested) or the TX UE location information

[0152] - Reference signal (e.g., DM-RS, etc.) information related to decoding (and / or channel estimation) of data sent through PSSCH. For example, information related to the pattern of (time-frequency) mapping resources of DM-RS, rank (RANK) information, antenna port index information, information about the number of antenna ports, etc.

[0153] In addition, in the present disclosure, for example, since the TX UE can send the SCI, the first SCI and / or the second SCI to the RX UE through the PSCCH, the PSCCH can be replaced / replaced by the SCI and / or the first SCI and / or the second SCI. Additionally / alternatively, the SCI can be replaced / replaced by the PSCCH and / or the first SCI and / or the second SCI. Additionally / alternatively, for example, since the TX UE can send the second SCI to the RX UE through the PSSCH, the PSSCH can be replaced / replaced by the second SCI.

[0154] In addition, in the present disclosure, for example, if the SCI configuration field is divided into two groups in consideration of a (relatively) high SCI payload size, the first SCI including the first SCI configuration field group may be referred to as the first SCI, and the second SCI including the second SCI configuration field group may be referred to as the second SCI. In addition, for example, the first SCI may be sent to the receiving UE via the PSCCH. In addition, for example, the second SCI may be sent to the receiving UE via the (independent) PSCCH, or may be piggybacked via the PSSCH and sent together with the data.

[0155] Furthermore, in the present disclosure, for example, the term “configuration / configured” or the term “defined / defined” may refer to (pre-) configuration from a base station or a network (for each resource pool) (through predefined signaling (e.g., SIB, MAC, RRC, etc.)).

[0156] Furthermore, in the present disclosure, for example, since the RLF is determined based on the out-of-sync (OOS) indicator or the in-sync (IS) indicator, the RLF may be replaced / substituted by the out-of-sync (OOS) indicator or the in-sync (IS) indicator.

[0157] In addition, in the present disclosure, for example, an RB may be replaced / replaced by a subcarrier. In addition, in the present disclosure, for example, a packet or a service may be replaced / replaced by a TB or a MAC PDU based on a transmission layer.

[0158] Furthermore, in the present disclosure, CBG may be substituted / replaced by TB.

[0159] Furthermore, in the present disclosure, for example, a source ID may be substituted / replaced by a destination ID.

[0160] Furthermore, in the present disclosure, for example, the L1 ID may be replaced / replaced by the L2 ID. For example, the L1 ID may be the L1 source ID or the L1 destination ID. For example, the L2 ID may be the L2 source ID or the L2 destination ID.

[0161] In addition, in the present disclosure, for example, the operation of the sending UE reserving / selecting / determining retransmission resources may include: the sending UE reserving / selecting / determining potential retransmission resources whose actual use will be determined based on the SL HARQ feedback information received from the receiving UE.

[0162] Furthermore, in the present disclosure, a sub-selection window may be replaced / substituted by a selection window and / or a preconfigured number of resource sets within the selection window, or vice versa.

[0163] In addition, in the present disclosure, SL MODE 1 may refer to a resource allocation method or a communication method in which a base station directly schedules SL transmission resources for a TX UE through predefined signaling (e.g., DCI or RRC message). For example, SL MODE 2 may refer to a resource allocation method or a communication method in which a UE independently selects SL transmission resources from a resource pool preconfigured or configured from a base station or a network. For example, a UE that performs SL communication based on SL MODE 1 may be referred to as a MODE 1UE or a MODE 1TXUE, and a UE that performs SL communication based on SL MODE 2 may be referred to as a MODE 2UE or a MODE 2TX UE.

[0164] In addition, in the present disclosure, for example, a dynamic grant (DG) may be replaced / replaced by a configuration grant (CG) and / or a semi-persistent scheduling (SPS) grant, or vice versa. For example, the DG may be replaced / replaced by a combination of a CG and an SPS grant, or vice versa. For example, the CG may include at least one of a configuration grant (CG) type 1 and / or a configuration grant (CG) type 2. For example, in CG type 1, the grant may be provided by RRC signaling and may be stored as a configuration grant. For example, in CG type 2, the grant may be provided by PDCCH and may be stored or deleted as a configuration grant based on L1 signaling indicating the enabling or disabling of the grant.

[0165] In addition, in the present disclosure, a channel may be replaced / replaced by a signal, or vice versa. For example, the transmission / reception of a channel may include the transmission / reception of a signal. For example, the transmission / reception of a signal may include the transmission / reception of a channel.

[0166] In addition, in the present disclosure, broadcast may be replaced by at least one of unicast, multicast and / or broadcast, or vice versa. For example, the broadcast type may be replaced by at least one of unicast, multicast and / or broadcast, or vice versa. For example, the broadcast or broadcast type may include unicast, multicast and / or broadcast.

[0167] Furthermore, in the present disclosure, a resource may be replaced / substituted by a time slot or a symbol, or vice versa. For example, a resource may include a time slot and / or a symbol.

[0168] Furthermore, in the present disclosure, 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.

[0169] -SL HARQ feedback, SL CSI, SL (L1) RSRP

[0170] In addition, in the present disclosure, the Uu channel may include a UL channel and / or a DL channel. For example, the UL channel may include a PUSCH, a PUCCH, etc. For example, the DL channel may include a PDCCH, a PDSCH, etc. For example, the SL channel may include a PSCCH, a PSSCH, a PSFCH, a PSBCH, etc.

[0171] In addition, in the present disclosure, the side link information may include at least one of a side link message, a side link packet, a side link service, a side link data, a side link control information and / or a side link transmission block (TB). For example, the side link information may be sent via PSSCH and / or PSCCH.

[0172] In addition, in NR resource allocation mode 1 (hereinafter, Mode 1), the UE can use multiple transmission resources scheduled by Mode 1 configuration grant DCI (hereinafter, Mode 1CG DCI) or Mode 1 dynamic grant DCI (hereinafter, Mode 1DG DCI) without considering the initial / retransmission purpose associated with the transport block (hereinafter, TB). Herein, for example, if the waiting time requirement associated with the TB is met, the transmitting UE can perform initial transmission or retransmission by using resources in a period adjacent to the multiple scheduled transmission resources. For example, the UE can use resources allocated by Mode 1CG DCI or Mode 1DG DCI only for side link communications associated with the UE that is pre-signaled / configured. For example, the UE may use resources allocated by Mode 1CG DCI or Mode 1DG DCI only for at least one of side-link communications related to QoS parameters, side-link communications related to broadcast type (e.g., unicast, groupcast, or broadcast), side-link communications related to service type, side-link communications related to L1 destination / source ID and / or L2 destination / source ID, or side-link communications related to a destination UE that is pre-signaled / configured via a field included in the DCI from the base station.

[0173] In addition, if the transmitting UE reports the side link HARQ feedback information to the base station and the predefined conditions are met, additional retransmission resources may be allocated to the transmitting UE via the mode 1DG DCI. In this article, for example, the predefined condition may be that the transmitting UE reports NACK / DTX information to the base station. For example, if the transmitting UE reports the side link HARQ feedback information (e.g., NACK / DTX information) received from the receiving UE to the base station via the pre-configured PUCCH resources, additional retransmission resources may be allocated from the base station to the transmitting UE via the mode 1DG DCI.

[0174] Herein, for example, the base station may arbitrarily determine when to send the Mode 1 DG DCI to the UE. For example, the base station may determine the time to send the Mode 1 DG DCI to the UE as any time within a preconfigured time window or before a timer expires or within the waiting time requirement of the relevant service.

[0175] Fig.13 An example is shown in which the transmitting UE reports HARQ feedback information to the base station if the transmitting UE fails in any periodic sub-link information transmission. Fig.13 The embodiments of the present invention can be combined with various embodiments of the present disclosure.

[0176] Reference Fig.13, if the transmitting UE fails to transmit the side-link information (TX#1 and TX#2), the transmitting UE may report the side-link HARQ feedback information (e.g., NACK / DTX information) received from the receiving UE to the base station through the pre-configured PUCCH resources. In this case, additional retransmission resources may be allocated from the base station to the transmitting UE through the mode 1DG DCI. In this case, if the transmitting UE receives the mode 1DG DCI from the base station, the transmitting UE needs to clearly identify which periodic resource of mode 1CG the additional retransmission resources allocated by the received mode 1DG DCI are related to. For example, the transmitting UE needs to clearly identify which periodic resource of mode 1DG the additional retransmission resources allocated by the received mode 1DG DCI are related to.

[0177] Hereinafter, based on various embodiments of the present disclosure, a method for a transmitting UE to identify a location of a transmitting resource based on control information and a device supporting the method will be described. In the present disclosure, a sidelink HARQ process ID may refer to a HARQ process ID. Various embodiments of the present disclosure may be extended to mode 2CG or mode 2DG.

[0178] Fig.14 A process in which a transmitting UE identifies a location of a transmitting resource based on control information according to an embodiment of the present disclosure is shown. Fig.14 The embodiments of the present invention can be combined with various embodiments of the present disclosure.

[0179] Reference Fig.14 In step S1410, the sending UE may send a resource request message or a HARQ feedback report to the base station. For example, the sending UE may send a message (e.g., SR / BSR) requesting additional allocation of secondary link retransmission resources to the base station via PUCCH. For example, the sending UE may send a report related to the secondary link HARQ feedback information to the base station via PUCCH.

[0180] In step S1420, the base station may send control information related to the CG to the sending UE. In step S1430, the sending UE may identify or determine the CG resource based on the control information related to the CG received from the base station. In step S1440, the sending UE may send the side link information to the receiving UE by using the identified or determined CG resource. For example, the side link information may include side link data and / or control information to be sent by the sending UE. Hereinafter, steps S1420 to S1440 will be described in more detail.

[0181] According to an implementation, similar to the uplink configuration authorization operation of the NR system, the base station can derive or determine the secondary link HARQ process ID associated with the mode 1 CG resource in a specific period based on a pre-configured formula. For example, the pre-configured formula can be the following formula 1.

[0182] [Formula 1]

[0183] HARQ process ID=[floor(CURRENT_symbol / periodicity)]modulo nrofHARQ-Processes

[0184] Referring to the above formula 1, for example, CURRENT_symbol may refer to SFN×numberOfSlotsPerFrame×numberOfSymbolsPerSlot+number of slots in a frame×numberOfSymbolsPerSlot+number of symbols in a slot. numberOfSlotsPerFrame may refer to the number of consecutive slots per frame. numberOfSymbolsPerSlot may refer to the number of consecutive symbols per slot. For example, formula 1 may be a formula for deriving a HARQ process ID associated with the first symbol transmitted for an uplink configuration grant.

[0185] For example, the sending UE may receive a mode 1DG DCI for allocating additional retransmission resources from the base station. For example, the base station may signal / send to the sending UE at least one of the sidelink HARQ process ID information related to the mode 1CG resources associated with the retransmission resources, the CG-related index information associated with the CG and the retransmission resources, or the new data indicator (NDI) information through the mode 1DG DCI for allocating additional retransmission resources. For example, the base station may signal / send to the sending UE at least one of the sidelink HARQ process ID information related to the mode 1CG resources in a specific period associated with the retransmission resources, the CG-related index information associated with the CG and the retransmission resources in a specific period, or the new data indicator (NDI) information through the mode 1DG DCI for allocating additional retransmission resources. The sending UE may identify or determine the mode 1CG index and the mode 1CG resources in the specific period for which the mode 1DG DCI received from the base station is directed. Herein, for example, a sub-link process ID associated with a mode 1CG resource may indicate / inform a link between a mode 1DG DCI for allocating additional retransmission resources and a mode 1CG resource in a specific target period. For example, a sub-link process ID associated with a mode 1CG resource may be different from or independent of the sub-link process ID information indicated by the SCI.

[0186] Based on an embodiment of the present disclosure, the DCI associated with the DG may be DCI format 3_0. For example, the DCI associated with the DG may include a configuration index. For example, the configuration index may be 3 bits. For example, if the UE is configured to monitor the DCI using a cyclic redundancy check (CRC) scrambled by a scheduling radio network temporary identifier (SL-CS-RNTI) configured by a secondary link, the configuration index may be 3 bits.

[0187] Based on the implementation method, the sending UE can specify or set the side link HARQ process ID value indicated by the SCI to the side link HARQ process ID information associated with mode 1CG. For example, the sending UE can specify or set the side link HARQ process ID value indicated by the SCI to the side link HARQ process ID information associated with mode 1CG for sending side link information associated with the side link HARQ process.

[0188] Based on the implementation method, the base station may not distinguish the additional retransmission resources allocated by the mode 1DG DCI by resource period. For example, the base station may allow the UE to use the additional retransmission resources allocated by the mode 1DG DCI for all initial transmissions and / or retransmissions associated with the target mode 1CG. For example, the base station may signal / send to the UE only the index information related to the CG associated with the retransmission resources via the mode 1DG DCI.

[0189] Alternatively, for example, the base station does not distinguish the additional retransmission resources allocated by Mode 1DG DCI by the index and resource period associated with the CG, and the base station may allow the UE to use the additional retransmission resources allocated by Mode 1DG DCI for all initial transmissions and / or retransmissions associated with the target Mode 1CG.

[0190] Based on the implementation method, if the base station allocates only periodic resources to the UE through mode 1CG DCI, and if the sending UE sends side-link information based on the allocated resources, the sending UE can determine or select the side-link HARQ process ID value indicated by the SCI related to the side-link information.

[0191] For example, if the transmitting UE requests retransmission resources from the base station via PUCCH, the transmitting UE may also signal / send the sublink HARQ process ID information related to the retransmission resources to the base station. For example, if the transmitting UE reports the sublink HARQ feedback information received from the receiving UE to the base station via PUCCH, the transmitting UE may also signal / send the sublink HARQ process ID information related to the HARQ feedback information. For example, the base station may specify or set the sublink HARQ process ID value indicated by the mode 1 DG DCI for allocating additional retransmission resources to the sublink HARQ process ID information reported by the UE.

[0192] For example, if the UE does not complete the first TB transmission based on a specific sublink HARQ process ID, and if the UE needs to perform the second TB transmission through the mode 1CG resources with the same sublink HARQ process ID, the UE can omit / skip the TB transmission associated with the service with a relatively low priority or a relatively high waiting time requirement or a relatively low reliability requirement. For example, if the UE does not complete the first TB transmission based on a specific sublink HARQ process ID, and if the UE needs to perform the second TB transmission through the mode 1CG resources with the same sublink HARQ process ID, the UE can omit / skip the TB transmission associated with the service with a relatively high priority or a relatively low waiting time requirement or a relatively high reliability requirement. For example, if the UE does not complete the first TB transmission based on the specific sublink HARQ process ID, and if the UE needs to perform the second TB transmission through the mode 1CG resources with the same sublink HARQ process ID, the UE can omit / skip the first TB transmission and the second TB transmission, or can omit / skip a randomly selected TB.

[0193] For example, if the UE does not complete the first TB transmission based on a specific sublink HARQ process ID, and if the UE needs to perform the second TB transmission through the mode 1CG resources with the same sublink HARQ process ID, the UE may only transmit TBs associated with services with relatively low priority or relatively high waiting time requirements or relatively low reliability requirements. For example, if the UE does not complete the first TB transmission based on a specific sublink HARQ process ID, and if the UE needs to perform the second TB transmission through the mode 1CG resources with the same sublink HARQ process ID, the UE may only transmit TBs associated with services with relatively high priority or relatively low waiting time requirements or relatively high reliability requirements. For example, if the UE does not complete the first TB transmission based on a specific sublink HARQ process ID, and if the UE needs to perform the second TB transmission through the mode 1CG resources with the same sublink HARQ process ID, the UE may perform either the first TB transmission or the second TB transmission, or may only transmit randomly selected TBs.

[0194] Based on the embodiments of the present disclosure, the sending UE may refresh the buffer of the TB for the side link process associated with the HARQ process ID before the next CG resource associated with the HARQ process ID. For example, the operation of the sending UE omitting / skipping the first TB may include the operation of the sending UE refreshing the buffer of the side link process related to the first TB. For example, before sending the second TB associated with the HARQ process ID, the sending UE may refresh the HARQ buffer for the first TB associated with the HARQ process ID.

[0195] Based on the embodiments of the present disclosure, if the transmitting UE performs TB transmission or new TB transmission by using the mode 1 CG resources in different cycles or adjacent cycles, it may be unclear which value of the sub-link HARQ process ID information, CG index information or NDI information indicated by the SCI is specified by the transmitting UE. This is because the mode 1 CG resources in different cycles or adjacent cycles may have different sub-link HARQ process IDs. For example, the sub-link HARQ process ID may be determined based on a pre-configured formula.

[0196] For example, in the case of Mode 2 operation, the UE may determine or select the secondary link HARQ process ID information indicated by the SCI associated with the Mode 2 CG resources in a particular period.

[0197] For example, the sending UE may specify or set the CG index value and / or the sub-link HARQ process ID value indicated by the SCI to the CG index information and / or the sub-link HARQ process ID information associated with the mode 1 CG resource in which the first or initial transmission associated with the TB is started. For example, the sending UE may specify or set the CG index value and / or the sub-link HARQ process ID value indicated by the SCI to the CG index information and / or the sub-link HARQ process ID information associated with the mode 1 CG resource in which the last transmission or the last retransmission associated with the TB will be performed.

[0198] For example, the base station may specify or set the sidelink HARQ process ID value indicated by the mode 1DG DCI for allocating additional retransmission resources to the sidelink HARQ process ID information associated with the PUCCH resource. For example, the base station may specify or set the sidelink HARQ process ID value indicated by the mode 1DG DCI for allocating additional retransmission resources to the sidelink HARQ process ID information associated with the mode 1CG resource at the closest time or the farthest time to the PUCCH resource among the mode 1CG resources associated with the PUCCH resource. For example, the base station may specify or set the sidelink HARQ process ID value indicated by the mode 1DG DCI for allocating additional retransmission resources to the HARQ process ID information associated with the mode 1CG resource including the first or last PSSCH time slot linked to the PSFCH time slot linked to the PUCCH resource (e.g., semi-static sidelink HARQ codebook operation). Herein, for example, the PUCCH resources may include at least one of PUCCH resources for reporting related to sidelink HARQ feedback information and / or PUCCH resources for message transmission requesting additional allocation of sidelink retransmission resources.

[0199] For example, the transmitting UE may successfully transmit the first TB using only some of the mode 1CG resources in a specific cycle, and may transmit the second TB in the buffer by using the remaining resources in the mode 1CG resources. In this case, the transmitting UE may set the sub-link HARQ process ID value indicated by the SCI to the sub-link process ID information associated with the mode CG resources in the specific cycle, and may switch the NDI value. That is, the sub-link HARQ process ID value indicated by the SCI associated with the first TB transmission may also be set to the same sub-link process ID information.

[0200] Fig.15 An example is shown in which a transmitting UE according to an embodiment of the present disclosure performs TB transmission or new TB transmission by using mode 1 CG resources in different cycles or adjacent cycles. Fig.15 The embodiments of the present invention can be combined with various embodiments of the present disclosure.

[0201] Reference Fig.15 , for example, the transmitting UE may perform a new TB transmission by using a Mode 1CG resource in an adjacent period with HARQ process ID #X / HARQ process ID #Y. For example, the Mode 1CG DCI may schedule resources with a period P (i.e., allocate two resources for each period). For example, the transmitting UE may set the sub-link HARQ process ID value indicated by the SCI to the sub-link HARQ process ID #X associated with the Mode 1CG resource in which the first or initial transmission associated with the TB is performed. The base station may set the sub-link HARQ process ID value indicated by the Mode 1DG DCI for allocating additional retransmission resources to the sub-link HARQ process ID #Y associated with the Mode 1CG resource associated with the PUCCH resource for reporting sub-link HARQ feedback information.

[0202] Based on the implementation method, the sending UE can send a sublink scheduling request (SR) / buffer status request (BSR) to the base station, and the base station can schedule initial transmission resources or retransmission resources for the sending UE through mode 1DG DCI#X, the sending UE can report the sublink HARQ feedback to the base station based on the PUCCH resources configured / associated with the initial transmission resources or retransmission resources, and the base station can allocate additional retransmission resources required for the sending UE through mode 1DG DCI#Y. In this case, for example, the base station can set the sublink HARQ process ID value indicated by mode 1DG DCI#Y to the sublink HARQ process ID information indicated by mode 1DG DCI#X.

[0203] Alternatively, for example, the base station may set the sublink HARQ process ID value indicated by mode 1DG DCI#Y to the sublink HARQ process ID information associated with the PUCCH resources used for sublink SR transmission and / or sublink BSR transmission. In addition, the base station may set the sublink HARQ process ID value indicated by mode 1DG DCI#X to the sublink HARQ process ID information associated with the PUCCH resources used for sublink SR transmission and / or sublink BSR transmission.

[0204] Herein, for example, the sending UE can set the sub-link HARQ process ID value indicated by the SCI to the sub-link HARQ process ID information associated with the mode 1DG resources used for sending associated with the sub-link HARQ process of the sending UE (for example, the sub-link HARQ process ID value signaled by the DCI for allocating mode 1DG resources).

[0205] For example, if operations related to Mode 1CG are performed, the base station may allocate / schedule additional retransmission resources to the transmitting UE via Mode 1DG DCI. For example, the base station may allocate / schedule additional retransmission resources to the transmitting UE via Mode 1DG DCI based on SL HARQ feedback information received from the transmitting UE via (pre-configured) PUCCH. In this case, for the link between Mode 1CG resources and the retransmission resources additionally allocated / scheduled via Mode 1DG DCI, the base station may define / configure information / fields (e.g., ID and / or CG index and / or NDI) for the link in Mode 1CG DCI and Mode 1DG DCI related to the allocation / scheduling of additional retransmission resources. For example, the ID may be a sublink HARQ process ID. For example, the base station may send information related to the link between Mode 1CG resources and the retransmission resources additionally allocated / scheduled via Mode 1DG DCI to the transmitting UE via Mode 1CG DCI. For example, the base station may send information related to the link between Mode 1CG resources and the retransmission resources additionally allocated / scheduled via Mode 1DG DCI to the transmitting UE via Mode 1DG DCI.

[0206] Herein, for example, if the field is implemented in the form of an ID or a sub-link HARQ process ID, the base station can set the ID or sub-link HARQ process ID value to a pre-configured specific value among multiple sub-link HARQ process IDs that can be used for operations related to mode 1DG. Herein, for example, the base station can set / limit the maximum value of the number of sub-link HARQ process IDs related to mode 1DG that can be used as a field value. For example, the base station can set / limit the minimum value of the number of sub-link HARQ process IDs related to mode 1DG that can be used as a field value.

[0207] Herein, for example, if the base station configures / sends mode 1 type 1CG and mode 1 type 2CG to the sending UE at the same time, the base station can independently or differently set the ID value or sub-link HARQ process ID assigned to each CG. Herein, for example, if a field for linking is defined and the field is implemented in the form of an ID or a sub-link HARQ process ID, the base station can configure / assign the ID or sub-link HARQ process ID value differently for each mode 1CG. For example, the base station can configure / assign the ID or sub-link HARQ process ID value differently for each of a plurality of mode 1CGs, and the base station can configure / send a plurality of mode 1CGs to the sending UE.

[0208] For example, if operations related to Mode 1CG are performed, the base station may allocate / schedule additional retransmission resources via Mode 1DG DCI. For example, the base station may allocate / schedule additional retransmission resources to the transmitting UE via Mode 1DG DCI based on the SLHARQ feedback information received from the transmitting UE via the (pre-configured) PUCCH. In this case, the maximum (allowed) number of retransmissions value pre-configured for the transmitting UE for operations related to Mode 1CG may include the number of (re)transmissions performed by the transmitting UE via the retransmission resources additionally allocated / scheduled via Mode 1DG DCI. For example, the maximum (allowed) number of retransmissions value pre-configured for the transmitting UE for operations related to Mode 1CG may include the number of (re)transmissions performed by the transmitting UE via the retransmission resources additionally allocated / scheduled via Mode 1DG DCI and the number of (re)transmissions performed by the transmitting UE via Mode 1CG resources. For example, the maximum (allowed) number of retransmissions value pre-configured for the sending UE for operations related to mode 1CG may not include the number of (re)transmissions performed by the sending UE via retransmission resources additionally allocated / scheduled by mode 1DGDCI.

[0209] For example, if the transmitting UE performs an initial transmission associated with the TB by using mode 1CG resources, and if the transmitting UE performs a (re)transmission associated with the TB by using retransmission resources additionally allocated / scheduled through mode 1DG DCI (associated with mode 1CG resources), then the maximum (allowed) number of retransmissions value preconfigured for the transmitting UE for the operation associated with mode 1CG may include the number of (re)transmissions performed by the transmitting UE via the retransmission resources additionally allocated / scheduled through mode 1DG DCI.

[0210] For example, if the sending UE performs an initial transmission associated with a TB by using mode 1DG resources, and if the sending UE performs a (re)transmission associated with a TB by using mode 1CG resources, the maximum (allowed) number of retransmissions value pre-configured for the sending UE for the operation associated with mode 1CG may not include the number of transmissions performed by the sending UE through mode 1DG DCI.

[0211] Fig.16 An example is shown in which a sending UE performs secondary link retransmission based on index information of a CG through resources allocated by a DG based on an embodiment of the present disclosure. Fig.16 The embodiments of the present invention can be combined with various embodiments of the present disclosure.

[0212] Reference Fig.16In step S1610, the base station may send a configuration grant (hereinafter, CG) to the sending UE. For example, the sending UE may send a message requesting secondary link resource allocation to the base station through the PUCCH, and the base station may send the CG to the sending UE based on the message requesting secondary link resource allocation. For example, the CG may be CG type 1 or CG type 2.

[0213] In step S1620, the transmitting UE may send the first PSCCH or the first PSSCH to the receiving UE based on the CG. For example, the transmitting UE may send the first PSCCH or the first PSSCH to the receiving UE through the first sub-link resource allocated by the CG. For example, the maximum number of retransmissions associated with the first sub-link resource allocated by the CG may be preconfigured. For example, the transmitting UE may send the first PSCCH or the first PSSCH to the receiving UE according to the preconfigured maximum number of retransmissions through the first sub-link resource allocated by the CG. For example, the transmitting UE may send the SCI to the receiving UE through the first PSCCH or the first PSSCH. For example, the SCI may include a second HARQ process ID.

[0214] In step S1630, the receiving UE may send HARQ feedback related to the first PSCCH or the first PSSCH to the transmitting UE. For example, the HARQ feedback may include ACK or NACK. For example, the receiving UE may send NACK corresponding to the first PSCCH or the first PSSCH to the transmitting UE via the PSFCH.

[0215] In step S1640, the sending UE may report the HARQ feedback related to the first PSCCH or the first PSSCH to the base station. For example, the sending UE may report the HARQ feedback related to the first PSCCH or the first PSSCH to the base station via PUCCH. For example, the sending UE may request a DG from the base station so as to be allocated resources for retransmitting the first PSCCH or the first PSSCH. For example, the sending UE may report the HARQ feedback related to the first PSCCH or the first PSSCH and the second HARQ process ID to the base station via PUCCH. For example, the sending UE may report the information related to the second HARQ process ID corresponding to the first PSCCH or the first PSSCH and NACK to the base station via PUCCH.

[0216] In step S1650, the base station may send a dynamic grant (hereinafter, DG) to the transmitting UE. For example, the base station may send the DG to the transmitting UE via the PDCCH based on the HARQ feedback reported by the transmitting UE. For example, the DG may include at least one of the index information of the CG associated with the DG or the first HARQ process ID associated with the first sub-link resource. For example, the first HARQ process ID may be determined by a preconfigured formula. For example, the first HARQ process ID may be determined by the above formula 1. For example, the DCI associated with the DG may include at least one of a field for the HARQ process ID, a field for the index of the CG, or an NDI field. For example, if there are multiple HARQ process IDs, the field value for the HARQ process ID may be a value of a preconfigured HARQ process ID among the multiple HARQ process IDs. For example, the maximum number of the first HARQ process ID may be configured.

[0217] In step S1660, the transmitting UE may resend the first PSCCH or the first PSSCH to the receiving UE based on the dynamic authorization. For example, the transmitting UE may resend the first PSCCH or the first PSSCH to the receiving UE through the second sub-link resource allocated by the DG based on the index information of the CG associated with the DG. For example, the maximum number of retransmissions associated with the CG may include the number of times the transmitting UE resends the first PSCCH or the first PSSCH to the receiving UE through the second sub-link resource allocated by the DG. For example, the maximum number of retransmissions associated with the CG may not include the number of times the transmitting UE resends the second PSCCH or the second PSSCH to the receiving UE through the sub-link resource allocated by the DG.

[0218] In addition, for example, the first HARQ process ID and the second HARQ process ID may be independent or different from each other. Alternatively, for example, the first HARQ process ID may be determined as the second HARQ process ID. For example, if the CG is configured as CG type 1 and CG type 2 at the same time, the HARQ process ID associated with CG type 1 and the HARQ process ID associated with CG type 2 may be configured differently or independently.

[0219] Fig.17 An example is shown in which a sending UE determines CG resources related to a DG based on CG index information according to an embodiment of the present disclosure. Fig.17 The embodiments of the present invention can be combined with various embodiments of the present disclosure.

[0220] Reference Fig.17, the base station may allocate multiple CG resources in different periods to the transmitting UE. For example, the base station may send a first CG resource and a second CG resource to the transmitting UE. The transmitting UE may send the side-link data to the receiving UE through the first CG resource within a period associated with the first CG resource. In this case, for example, if the transmitting UE fails to send the side-link data to the receiving UE through the first CG resource, the transmitting UE may request additional resources from the base station through the PUCCH resource associated with the first CG resource in order to send additional side-link data. For example, the transmitting UE may send information related to the NACK to the base station through the PUCCH resource based on the NACK for the side-link data received from the receiving UE. The base station may send the DG to the transmitting UE based on the additional resource request or the information related to the NACK. Herein, the DG may include CG index information for distinguishing the first CG resource from the second resource. The transmitting UE may determine the DG resource associated with the first CG resource based on the CG index information included in the DG. The transmitting UE may resend the side-link data to the receiving UE through the DG resource associated with the first CG resource.

[0221] Fig.18 A method in which a first device performs sub-link retransmission to a second device based on index information of a CG through resources allocated by a DG according to an embodiment of the present disclosure is shown. Fig.18 The embodiments of the present invention can be combined with various embodiments of the present disclosure.

[0222] Reference Fig.18 , in step S1810, the first device 100 may receive a configuration authorization from a base station.

[0223] In step S1820, the first device 100 may transmit a first physical sub-link control channel (PSCCH) or a first physical sub-link shared channel (PSSCH) to the second device 200 through the first sub-link resource allocated by the configuration grant. For example, the maximum number of retransmissions associated with the first sub-link resource allocated by the configuration grant may be preconfigured. For example, the maximum number of retransmissions may include the number of times the first PSCCH or the first PSSCH is retransmitted to the second device through the second sub-link resource allocated by the dynamic grant. For example, the maximum number of retransmissions may not include the number of times the second PSCCH or the second PSSCH is transmitted through the sub-link resource allocated by the dynamic grant.

[0224] For example, the first device 100 may receive hybrid automatic repeat request (HARQ) feedback information related to the first PSCCH or the first PSSCH from the second device 200. For example, side link control information (SCI) including a second HARQ process ID may be transmitted to the second device 200 via the first PSCCH or the first PSSCH.

[0225] For example, the first device 100 may report the HARQ feedback information to the base station through a physical uplink control channel (PUCCH).For example, the second HARQ process ID may be reported to the base station together with the HARQ feedback information.

[0226] In step S1830, the first device 100 may receive a dynamic grant from the base station via a physical downlink control channel (PDCCH). For example, the dynamic grant may include index information of a configuration grant related to the dynamic grant. For example, the dynamic grant may include a first HARQ process ID related to the first sub-link resource. For example, the first HARQ process ID may be determined based on a preconfigured formula. For example, the second HARQ process ID may be independent of the first HARQ process ID. For example, the first HARQ process ID may be determined as the second HARQ process ID. For example, the maximum value of the number of the first HARQ process ID may be configured.

[0227] For example, based on the configuration grant being configured as configuration grant type 1 and configuration grant type 2 at the same time, the HARQ process ID allocated to configuration grant type 1 and the HARQ process ID allocated to configuration grant type 2 may be independently configured.

[0228] For example, downlink control information (DCI) related to dynamic grant may include at least one of a field for HARQ process ID, a field for configuring an index of grant, or a new data indicator (NDI) field. For example, the value of the field for HARQ process ID may be a value for a pre-configured HARQ process ID among a plurality of HARQ process IDs.

[0229] In step S1840, the first device 100 may resend the first PSCCH or the first PSSCH to the second device 200 through the second sublink resource allocated by the dynamic grant based on the index information of the configuration grant.

[0230] The proposed method can be applied to the device described in the present disclosure. First, the processor 102 of the first device 100 can control the transceiver 106 to receive a configuration authorization from the base station. In addition, the processor 102 of the first device 100 can control the transceiver 106 to send a first physical sub-link control channel (PSCCH) or a first physical sub-link shared channel (PSSCH) to the second device 200 through the first sub-link resource allocated by the configuration authorization. In addition, the processor 102 of the first device 100 can control the transceiver 106 to receive a dynamic authorization from the base station through the physical downlink control channel (PDCCH). In addition, the processor 102 of the first device 100 can control the transceiver 106 to resend the first PSCCH or the first PSSCH to the second device 200 through the second sub-link resource allocated by the dynamic authorization based on the index information of the configuration authorization.

[0231] Based on the embodiments of the present disclosure, a first device configured to perform wireless communication may be provided. For example, the first device may include: one or more memories storing instructions; one or more transceivers; and one or more processors connected to the one or more memories and the one or more transceivers. For example, the one or more processors may execute the instructions to: receive a configuration authorization from a base station; send a first physical sub-link control channel (PSCCH) or a first physical sub-link shared channel (PSSCH) to a second device via a first sub-link resource allocated by the configuration authorization; receive a dynamic authorization from a base station via a physical downlink control channel (PDCCH), wherein the dynamic authorization includes index information of a configuration authorization related to the dynamic authorization; and based on the index information of the configuration authorization, resend the first PSCCH or the first PSSCH to the second device via a second sub-link resource allocated by the dynamic authorization.

[0232] Based on the embodiments of the present disclosure, a device configured to control a first user equipment (UE) may be provided. For example, the device may include: one or more processors; and one or more memories, the one or more memories being operably connected to the one or more processors and storing instructions. For example, the one or more processors may execute the instructions to: receive a configuration authorization from a base station; send a first physical sub-link control channel (PSCCH) or a first physical sub-link shared channel (PSSCH) to a second UE via a first sub-link resource allocated by the configuration authorization; receive a dynamic authorization from a base station via a physical downlink control channel (PDCCH), wherein the dynamic authorization includes index information of a configuration authorization related to the dynamic authorization; and based on the index information of the configuration authorization, resend the first PSCCH or the first PSSCH to the second UE via a second sub-link resource allocated by the dynamic authorization.

[0233] Based on the embodiments of the present disclosure, a non-transitory computer-readable storage medium storing instructions may be provided. For example, when the instructions are executed, the first device may: receive a configuration authorization from a base station; send a first physical sub-link control channel (PSCCH) or a first physical sub-link shared channel (PSSCH) to a second device via a first sub-link resource allocated by the configuration authorization; receive a dynamic authorization from a base station via a physical downlink control channel (PDCCH), wherein the dynamic authorization includes index information of a configuration authorization related to the dynamic authorization; and based on the index information of the configuration authorization, resend the first PSCCH or the first PSSCH to the second device via a second sub-link resource allocated by the dynamic authorization.

[0234] Fig.19 A method is shown in which a second device according to an embodiment of the present disclosure receives sub-link information from a first device through resources allocated by a DG based on index information of a CG. Fig.19 The embodiments of the present invention can be combined with various embodiments of the present disclosure.

[0235] Reference Fig.19In step S1910, the second device 200 may receive a first physical sub-link control channel (PSCCH) or a first physical sub-link shared channel (PSSCH) from the first device 100 through the first sub-link resource allocated by the configuration authorization. For example, the configuration authorization may be received from the base station to the first device 100. For example, the maximum number of retransmissions associated with the first sub-link resource allocated by the configuration authorization may be preconfigured. For example, the maximum number of retransmissions may include the number of times the first PSCCH or the first PSSCH is retransmitted to the second device through the second sub-link resource allocated by the dynamic authorization. For example, the maximum number of retransmissions may not include the number of times the second PSCCH or the second PSSCH is sent through the sub-link resource allocated by the dynamic authorization. For example, the sub-link control information (SCI) including the second HARQ process ID may be sent to the second device 200 through the first PSCCH or the first PSSCH.

[0236] For example, the second device 200 may send hybrid automatic repeat request (HARQ) feedback information related to the first PSCCH or the first PSSCH to the first device 100. For example, the HARQ feedback information may be reported to the base station via a physical uplink control channel (PUCCH). For example, the second HARQ process ID may be reported to the base station together with the HARQ feedback information.

[0237] In step S1920, the second device 200 may re-receive the first PSCCH or the first PSSCH from the first device 100 through the second side-link resource allocated by the dynamic grant based on the index information of the configuration grant related to the dynamic grant. For example, the dynamic grant may be received from the base station to the first device through a physical downlink control channel (PDCCH). For example, the dynamic grant may include the index information of the configuration grant related to the dynamic grant. For example, the dynamic grant may include the first HARQ process ID related to the first side-link resource. For example, the first HARQ process ID may be determined based on a preconfigured formula. For example, the second HARQ process ID may be independent of the first HARQ process ID. For example, the first HARQ process ID may be determined as the second HARQ process ID. For example, the maximum value of the number of the first HARQ process ID may be configured.

[0238] For example, based on the configuration grant being configured as configuration grant type 1 and configuration grant type 2 at the same time, the HARQ process ID allocated to configuration grant type 1 and the HARQ process ID allocated to configuration grant type 2 may be independently configured.

[0239] For example, downlink control information (DCI) related to dynamic grant may include at least one of a field for HARQ process ID, a field for configuring an index of grant, or a new data indicator (NDI) field. For example, the value of the field for HARQ process ID may be a value for a pre-configured HARQ process ID among a plurality of HARQ process IDs.

[0240] The proposed method can be applied to the devices described in the present disclosure. First, the processor 202 of the second device 200 can control the transceiver 206 to receive the first physical sub-link control channel (PSCCH) or the first physical sub-link shared channel (PSSCH) from the first device 100 through the first sub-link resource allocated by the configuration grant. In addition, the processor 202 of the second device 200 can control the transceiver 206 to re-receive the first PSCCH or the first PSSCH from the first device 100 through the second sub-link resource allocated by the dynamic grant based on the index information of the configuration grant related to the dynamic grant.

[0241] Based on the embodiments of the present disclosure, a second device configured to perform wireless communication may be provided. For example, the second device may include: one or more memories storing instructions; one or more transceivers; and one or more processors connected to the one or more memories and the one or more transceivers. For example, the one or more processors may execute the instructions to: receive a first physical sub-link control channel (PSCCH) or a first physical sub-link shared channel (PSSCH) from a first device via a first sub-link resource allocated by a configuration authorization; based on index information of a configuration authorization associated with a dynamic authorization, re-receive the first PSCCH or the first PSSCH from the first device via a second sub-link resource allocated by a dynamic authorization. For example, the configuration authorization may be received from a base station to the first device. For example, the dynamic authorization may be received from a base station to the first device via a physical downlink control channel (PDCCH). For example, the dynamic authorization may include index information of a configuration authorization associated with the dynamic authorization.

[0242] Fig. 20 A method is shown in which a first device performs sub-link synchronization based on an embodiment of the present disclosure and performs sub-link retransmission to a second device through resources allocated by a DG based on index information of a CG. Fig. 20 The embodiments of the present invention can be combined with various embodiments of the present disclosure.

[0243] Reference Fig. 20In step S2010, the first device 100 may select a synchronization source based on the secondary link synchronization priority. For example, the synchronization source may include at least one of a GNSS, a base station, or a UE. For example, the secondary link synchronization priority may be configured based on Table 5 or Table 6 above. For example, the secondary link priority may be pre-configured for the first device 100.

[0244] In step S2020, the first device 100 may obtain synchronization based on the synchronization source. For example, the first device 100 may perform synchronization with the selected synchronization source.

[0245] In step S2030, the first device 100 may transmit a sublink synchronization signal block (S-SSB) block to the second device 200 based on the obtained synchronization. For example, the S-SSB block may include a sublink primary synchronization signal (S-PSS), a sublink secondary synchronization signal (S-SSS), and a physical sublink broadcast channel (PSBCH).

[0246] In step S2040, the first device 100 may receive a CG from a base station.

[0247] In step S2050, the first device 100 may send the first PSCCH or the first PSSCH to the second device 200 through the first sub-link resource allocated by the CG. For example, the maximum number of retransmissions related to the first sub-link resource allocated by the CG may be preconfigured. For example, the maximum number of retransmissions may include the number of times the first PSCCH or the first PSSCH is retransmitted to the second device 200 through the second sub-link resource allocated by the DG. For example, the maximum number of retransmissions may not include the number of times the second PSCCH or the second PSSCH is sent through the sub-link resource allocated by the DG.

[0248] For example, the first device 100 may receive HARQ feedback information related to the first PSCCH or the first PSSCH from the second device 200. For example, the SCI including the second HARQ process ID may be transmitted to the second device 200 through the first PSCCH or the first PSSCH.

[0249] For example, the first device 100 may report the HARQ feedback information to the base station through the PUCCH. For example, the second HARQ process ID may be reported to the base station together with the HARQ feedback information.

[0250] In step S2060, the first device 100 may receive a DG from a base station via a physical downlink control channel (PDCCH). For example, the DG may include index information of a CG related to the DG. For example, the DG may include a first HARQ process ID related to a first sub-link resource. For example, the first HARQ process ID may be determined based on a preconfigured formula. For example, the first HARQ process ID and the second HARQ process ID may be independent of each other. For example, the first HARQ process ID may be determined as the second HARQ process ID. For example, the maximum value of the number of first HARQ process IDs may be configured.

[0251] For example, based on the configuration grant being configured as configuration grant type 1 and configuration grant type 2 at the same time, the HARQ process ID allocated to configuration grant type 1 and the HARQ process ID allocated to configuration grant type 2 may be independently configured.

[0252] For example, downlink control information (DCI) related to dynamic grant may include at least one of a field for HARQ process ID, a field for configuring an index of grant, or a new data indicator (NDI) field. For example, the value of the field for HARQ process ID may be a value for a pre-configured HARQ process ID among a plurality of HARQ process IDs.

[0253] In step S2070, the first device 100 may resend the first PSCCH or the first PSSCH to the second device 200 through the second sub-link resources allocated by the DG based on the CG index information.

[0254] The proposed method can be applied to the devices described in the present disclosure. First, the processor 102 of the first device 100 can select a synchronization source based on the sub-link synchronization priority. For example, the processor 102 of the first device 100 can obtain synchronization based on the synchronization source. In addition, the processor 102 of the first device 100 can control the transceiver 106 to send the S-SSB block to the second device 200 based on the obtained synchronization. For example, the processor 102 of the first device 100 can control the transceiver 106 to receive the CG from the base station. In addition, the processor 102 of the first device 100 can control the transceiver 106 to send the first PSCCH or the first PSSCH to the second device 200 through the first sub-link resource allocated by the CG. In addition, the processor 102 of the first device 100 can control the transceiver 106 to receive the DG from the base station through the physical downlink control channel (PDCCH). In addition, the processor 102 of the first device 100 can control the transceiver 106 to resend the first PSCCH or the first PSSCH to the second device 200 through the second sub-link resources allocated by the DG based on the index information of the CG.

[0255] Based on the embodiments of the present disclosure, a first device configured to perform wireless communication may be provided. For example, the first device may include: one or more memories storing instructions; one or more transceivers; and one or more processors connected to the one or more memories and the one or more transceivers. For example, the one or more processors may execute the instructions to: select a synchronization source based on a sublink synchronization priority; obtain synchronization based on a synchronization source; send an S-SSB block to a second device based on the obtained synchronization; receive a configuration authorization from a base station; send a first physical sublink control channel (PSCCH) or a first physical sublink shared channel (PSSCH) to a second device through a first sublink resource allocated by the configuration authorization; receive a dynamic authorization from a base station through a physical downlink control channel (PDCCH), wherein the dynamic authorization includes index information of a configuration authorization related to the dynamic authorization; resend the first PSCCH or the first PSSCH to the second device through a second sublink resource allocated by the dynamic authorization based on the index information of the configuration authorization.

[0256] Based on the embodiments of the present disclosure, a device configured to control a first user equipment (UE) may be provided. For example, the device may include: one or more processors; and one or more memories, the one or more memories being operably connected to the one or more processors and storing instructions. For example, the one or more processors may execute the instructions to: select a synchronization source based on a sublink synchronization priority; obtain synchronization based on a synchronization source; send an S-SSB block to a second UE based on the obtained synchronization; receive a configuration authorization from a base station; send a first physical sublink control channel (PSCCH) or a first physical sublink shared channel (PSSCH) to a second UE via a first sublink resource allocated by the configuration authorization; receive a dynamic authorization from a base station via a physical downlink control channel (PDCCH), wherein the dynamic authorization includes index information of a configuration authorization related to the dynamic authorization; resend the first PSCCH or the first PSSCH to the second UE via a second sublink resource allocated by the dynamic authorization based on the index information of the configuration authorization.

[0257] Based on the embodiments of the present disclosure, a non-transitory computer-readable storage medium storing instructions may be provided. For example, when the instructions are executed, they may cause the first device to: select a synchronization source based on the sublink synchronization priority; obtain synchronization based on the synchronization source; send the S-SSB block to the second device based on the obtained synchronization; receive a configuration authorization from the base station; send the first physical sublink control channel (PSCCH) or the first physical sublink shared channel (PSSCH) to the second device through the first sublink resource allocated by the configuration authorization; receive a dynamic authorization from the base station through the physical downlink control channel (PDCCH), wherein the dynamic authorization includes index information of the configuration authorization related to the dynamic authorization; resend the first PSCCH or the first PSSCH to the second device through the second sublink resource allocated by the dynamic authorization based on the index information of the configuration authorization.

[0258] Hereinafter, devices to which various embodiments of the present disclosure can be applied will be described.

[0259] The various descriptions, functions, processes, proposals, methods and / or operational flows of the present disclosure described in this document may be applied to, but not limited to, various fields requiring wireless communication / connection between devices (e.g., 5G).

[0260] Hereinafter, a description will be given in more detail with reference to the accompanying drawings. In the following drawings / descriptions, unless otherwise described, the same reference numerals may represent the same or corresponding hardware blocks, software blocks or functional blocks.

[0261] Fig.21 A communication system (1) according to an embodiment of the present disclosure is shown.

[0262] Reference Fig.21, a communication system (1) to which various embodiments of the present disclosure are applied includes a wireless device, a base station (BS), and a network. Herein, a wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G new RAT (NR) or long term evolution (LTE)), and may be referred to as a communication / radio / 5G device. The wireless device may include, but is not limited to, a robot (100a), a vehicle (100b-1, 100b-2), an extended reality (XR) device (100c), a handheld device (100d), a home appliance (100e), an Internet of Things (IoT) device (100f), and an artificial intelligence (AI) device / server (400). For example, a vehicle may include a vehicle with a wireless communication function, an autonomous vehicle, and a vehicle capable of performing inter-vehicle communication. Herein, a vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices and may be implemented in the form of head mounted devices (HMD), head up displays (HUD) installed in vehicles, televisions, smart phones, computers, wearable devices, home appliance devices, digital signage, vehicles, robots, etc. Handheld devices may include smart phones, smart boards, wearable devices (e.g., smart watches or smart glasses), and computers (e.g., notebooks). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors and smart meters. For example, a BS and a network may be implemented as wireless devices, and a specific wireless device (200a) may operate as a BS / network node relative to other wireless devices.

[0263] Here, the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may include a narrowband Internet of Things for low-power communication in addition to LTE, NR and 6G. In this case, for example, NB-IoT technology may be an example of a low-power wide area network (LPWAN) technology, and may be implemented as a standard such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the above names. Additionally or alternatively, the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may perform communication based on LTE-M technology. In this case, as an example, LTE-M technology may be an example of LPWAN, and may be referred to as various names, including enhanced machine type communication (eMTC), etc. For example, LTE-M technology may be implemented as at least any of various standards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-bandwidth limited (non-BL), 5) LTE-MTC, 6) LTE machine type communication and / or 7) LTE M, and is not limited to the above names. Additionally or alternatively, the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may include at least one of Bluetooth, a low power wide area network (LPWAN), and ZigBee considering low power communication, and is not limited to the above names. As an example, the ZigBee technology may generate a personal area network (PAN) related to small / low power digital communication based on various standards including IEEE 802.15.4, etc., and may be referred to as various names.

[0264] The wireless devices 100a to 100f may be connected to the network 300 via the BS 200. The 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 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although the wireless devices 100a to 100f may communicate with each other via the BS 200 / network 300, the wireless devices 100a to 100f may perform direct communication (e.g., sidelink communication) with each other without passing through the BS / network. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). An IoT device (e.g., a sensor) may perform direct communication with other IoT devices (e.g., a sensor) or other wireless devices 100a to 100f.

[0265] Wireless communication / connection 150a, 150b or 150c can be established between wireless devices 100a to 100f / BS200 or BS200 / BS200. Here, the wireless communication / connection can be established through various RATs (e.g., 5G NR) such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication) or inter-BS communication (e.g., relay, integrated access backhaul (IAB)). The wireless device and the BS / wireless device can send / receive radio signals to / from each other through wireless communication / connection 150a and 150b. For example, wireless communication / connection 150a and 150b can send / receive signals through various physical channels. To this end, various configuration information configuration processes for sending / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation and resource mapping / demapping) and at least a portion of the resource allocation process can be performed based on various proposals of the present disclosure.

[0266] Fig. 22 A wireless device according to an embodiment of the present disclosure is shown.

[0267] Reference Fig. 22 , the first wireless device (100) and the second wireless device (200) may transmit radio signals via various RATs (e.g., LTE and NR). Herein, {the first wireless device (100) and the second wireless device (200)} may correspond to Fig.21 {wireless device (100x) and BS (200)} and / or {wireless device (100x) and wireless device (100x)}.

[0268] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and may additionally further include one or more transceivers 106 and / or one or more antennas 108. The (one or more) processors 102 may control the (one or more) memories 104 and / or the (one or more) transceivers 106, and may be configured to implement the descriptions, functions, processes, proposals, methods and / or operation flows disclosed in this document. For example, the (one or more) processors 102 may process the information in the (one or more) memories 104 to generate first information / signals, and then send a radio signal including the first information / signals through the (one or more) transceivers 106. The (one or more) processors 102 may receive a radio signal including a second information / signal through the transceiver 106, and then store the information obtained by processing the second information / signals in the (one or more) memories 104. The (one or more) memories 104 may be connected to the (one or more) processors 102, and may store various information related to the operation of the (one or more) processors 102. For example, (one or more) memories 104 may store software code including commands for executing part or all of the processing controlled by (one or more) processors 102 or for executing the descriptions, functions, processes, proposals, methods and / or operational flows disclosed in this document. Here, (one or more) processors 102 and (one or more) memories 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). (One or more) transceivers 106 may be connected to (one or more) processors 102 and send and / or receive radio signals through (one or more) antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. (One or more) transceivers 106 may be used interchangeably with (one or more) radio frequency (RF) units. In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0269] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and may additionally further include one or more transceivers 206 and / or one or more antennas 208. The (one or more) processors 202 may control the (one or more) memories 204 and / or the (one or more) transceivers 206, and may be configured to implement the descriptions, functions, processes, proposals, methods and / or operation flows disclosed in this document. For example, the (one or more) processors 202 may process the information in the (one or more) memories 204 to generate third information / signals, and then transmit a radio signal including the third information / signals through the (one or more) transceivers 206. The (one or more) processors 202 may receive a radio signal including a fourth information / signal through the (one or more) transceivers 106, and then store the information obtained by processing the fourth information / signals in the (one or more) memories 204. The (one or more) memories 204 may be connected to the (one or more) processors 202, and may store various information related to the operation of the (one or more) processors 202. For example, (one or more) memories 204 may store software code including commands for executing part or all of the processing controlled by (one or more) processors 202 or for executing the descriptions, functions, processes, proposals, methods and / or operational flows disclosed in this document. Here, (one or more) processors 202 and (one or more) memories 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). (One or more) transceivers 206 may be connected to (one or more) processors 202 and transmit and / or receive radio signals through (one or more) antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. (One or more) transceivers 206 may be used interchangeably with (one or more) RF units. In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0270] Below, the hardware elements of the wireless devices 100 and 200 will be described in more detail. One or more protocol layers may be implemented by, but are not limited to, one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). One or more processors 102 and 202 may generate one or more protocol data units (PDUs) and / or one or more service data units (SDUs) according to the description, function, process, proposal, method, and / or operation flow disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information according to the description, function, process, proposal, method, and / or operation flow disclosed in this document. One or more processors 102 and 202 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information according to the description, function, process, proposal, method, and / or operation flow disclosed in this document, and provide the generated signals to one or more transceivers 106 and 206. One or more processors 102 and 202 can receive signals (e.g., baseband signals) from one or more transceivers 106 and 206 and obtain PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operating procedures disclosed in this document.

[0271] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 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 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204, thereby being driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be implemented using software or firmware in the form of code, commands, and / or command sets.

[0272] One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and may store various types of data, signals, messages, information, programs, codes, instructions, and / or commands. One or more memories 104 and 204 may be composed of read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard drive, registers, cash memory, computer-readable storage media, and / or combinations thereof. One or more memories 104 and 204 may be located inside and / or outside one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 via various technologies such as wired or wireless connections.

[0273] One or more transceivers 106 and 206 may send user data, control information, and / or radio signals / channels mentioned in the method and / or operation flow of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information, and / or radio signals / channels mentioned in the description, function, process, proposal, method, and / or operation flow disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202, and may send and receive radio signals. For example, one or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may send user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may receive user data, control information, or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to send and receive user data, control information and / or radio signals / channels mentioned in the description, functions, processes, proposals, methods and / or operation flows disclosed in this document through one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received radio signals / channels, etc. from RF band signals to baseband signals to process received user data, control information, radio signals / channels, etc. using one or more processors 102 and 202. 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 and 206 may include (analog) oscillators and / or filters.

[0274] Fig.23 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown.

[0275] Reference Fig.23 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). Fig.23 Operation / function, not limited to Fig. 22 The processor (102, 202) and / or transceiver (106, 206) of Fig. 22The processor (102, 202) and / or the transceiver (106, 206) are implemented Fig.23 For example, you can Fig. 22 The processor (102, 202) implements blocks 1010 to 1060. Alternatively, Fig. 22 The processor (102, 202) implements blocks 1010 to 1050 and can be implemented by Fig. 22 The transceiver (106, 206) is used to implement box 1060.

[0276] Can be through Fig.23 The signal processing circuit (1000) converts the codeword into a radio signal. Herein, the codeword is a coded bit sequence of an information block. The information block may include a transport block (e.g., UL-SCH transport block, DL-SCH transport block). The radio signal may be transmitted through various physical channels (e.g., PUSCH and PDSCH).

[0277] Specifically, the codeword can be converted into a scrambled bit sequence by the scrambler 1010. The scrambling sequence for scrambling can be generated based on an initial value, and the initial value can include the ID information of the wireless device. The scrambled bit sequence can be modulated into a modulation symbol sequence by the modulator 1020. The modulation scheme may include pi / 2-binary phase shift keying (pi / 2-BPSK), m-phase shift keying (m-PSK) and m-quadrature amplitude modulation (m-QAM). The complex modulation symbol sequence can be mapped to one or more transmission layers by the layer mapper 1030. The modulation symbol of each transmission layer can be mapped (precoded) to (one or more) corresponding antenna ports by the precoder 1040. The output z of the precoder 1040 can be obtained by multiplying the output y of the layer mapper 1030 with the N*M precoding matrix W. Here, N is the number of antenna ports and M is the number of transmission layers. The precoder 1040 can perform precoding after performing transform precoding (e.g., DFT) for the complex modulation symbol. Alternatively, the precoder 1040 may perform precoding without performing transform precoding.

[0278] The resource mapper 1050 may map the modulation symbols of each antenna port to time-frequency resources. The time-frequency resources may include multiple symbols in the time domain (e.g., CP-OFDMA symbols and DFT-s-OFDMA symbols) and multiple subcarriers in the frequency domain. The signal generator 1060 may generate a radio signal from the mapped modulation symbols, and the generated radio signal may be sent to other devices through each antenna. To this end, the signal generator 1060 may include an inverse fast Fourier transform (IFFT) module, a cyclic prefix (CP) inserter, a digital-to-analog converter (DAC), and an up-converter.

[0279] Can be used with Fig.23 The signal processing process for the signal received in the wireless device is configured in a manner opposite to the signal processing process (1010-1060) of the wireless device. Fig. 22 100, 200) can receive a radio signal from the outside through an antenna port / transceiver. The received radio signal can be converted into a baseband signal by 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. Next, the baseband signal can be restored to a codeword through a resource demapping process, a post-coding process, a demodulation processor, and a descrambling process. The codeword can be restored to the original information block by decoding. Therefore, a signal processing circuit (not illustrated) for receiving a signal may include a signal restorer, a resource demapper, a post-encoder, a demodulator, a descrambler, and a decoder.

[0280] Fig.24 Another example of a wireless device according to an embodiment of the present disclosure is shown. The wireless device can be implemented in various forms according to use cases / services (see Fig.21 ).

[0281] Reference Fig.24 , the wireless device (100, 200) may correspond to Fig. 22 The wireless devices (100, 200) may be configured by various elements, components, units / portions and / or modules. For example, each of the wireless devices (100, 200) may include a communication unit (110), a control unit (120), a storage unit (130) and additional components (140). The communication unit may include a communication circuit (112) and (one or more) transceivers (114). For example, the communication circuit (112) may include Fig. 22 One or more processors (102, 202) and / or one or more memories (104, 204) of the present invention. For example, the transceiver(s) (114) may include Fig. 22The control unit (120) is electrically connected to the communication unit (110), the storage unit (130) and the additional components (140), and controls the overall operation of the wireless device. For example, the control unit (120) can control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the storage unit (130). The control unit (120) can send the information stored in the storage unit (130) to the outside (e.g., other communication devices) via the communication unit (110) through a wireless / wired interface, or store the information received from the outside (e.g., other communication devices) via the communication unit (110) through a wireless / wired interface in the storage unit (130).

[0282] The additional component (140) may be configured in various ways depending on the type of the wireless device. For example, the additional component (140) may include at least one of a power unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device may be implemented in the following forms without limitation: a robot ( Fig.21 100a), vehicles ( Fig.21 100b-1 and 100b-2), XR devices ( Fig.21 100c), handheld device ( Fig.21 100d), household appliances ( Fig.21 100e), IoT devices ( Fig.21 100f), digital broadcast terminal, hologram device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate / environmental device, AI server / device ( Fig.21 400), BS( Fig.21 200), network nodes, etc. Depending on the use case / service, the wireless device can be used in a mobile or fixed place.

[0283] exist Fig.24In the wireless device (100, 200), all the various elements, components, units / parts and / or modules in the wireless device (100, 200) can be connected to each other through a wired interface, or at least part of them can be connected wirelessly through the communication unit (110). For example, in each of the wireless devices (100, 200), the control unit (120) and the communication unit (110) can be connected by wire, and the control unit (120) and the first unit (e.g., 130, 140) can be connected wirelessly through the communication unit (110). Each element, component, unit / part and / or module in the wireless device (100, 200) can also include one or more elements. For example, the control unit (120) can be constructed by a collection of one or more processors. As an example, the control unit (120) can be constructed by a collection of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing unit and a memory control processor. As another example, the storage unit (130) may be constructed by a random access memory (RAM), a dynamic RAM (DRAM), a read only memory (ROM), a flash memory, a volatile memory, a nonvolatile memory, and / or a combination thereof.

[0284] Hereinafter, the implementation will be described in detail with reference to the accompanying drawings. Fig.24 .

[0285] Fig.25 A handheld device according to an embodiment of the present disclosure is shown. The handheld device may include a smart phone, a smart pad, a wearable device (e.g., a smart watch or smart glasses), or a portable computer (e.g., a notebook). The handheld 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).

[0286] Reference Fig.25 The handheld device (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a storage unit (130), a power supply unit (140a), an interface unit (140b) and an I / O unit (140c). The antenna unit (108) may be configured as a part of the communication unit (110). Blocks 110 to 130 / 140a to 140c correspond to Fig.24 Frame 110 to 130 / 140.

[0287] The communication unit 110 may send and receive signals (e.g., data signals and control signals) to and from other wireless devices or BSs. The control unit 120 may perform various operations by controlling the constituent elements of the handheld device 100. The control unit 120 may include an application processor (AP). The storage unit 130 may store data / parameters / programs / codes / commands required to drive the handheld device 100. The storage unit 130 may store input / output data / information. The power supply unit 140a may supply power to the handheld device 100 and include a wired / wireless charging circuit, a battery, etc. The interface unit 140b may support the connection of the handheld device 100 to other external devices. The interface unit 140b may include various ports (e.g., audio I / O ports and video I / O ports) for connecting to external devices. The I / O unit 140c may input or output video information / signals, audio information / signals, data and / or information input by a user. The I / O unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker and / or a tactile module.

[0288] For example, in the case of data communication, the I / O unit 140c can obtain information / signals (e.g., touch, text, voice, image, or video) input by the user, and the obtained information / signals can be stored in the storage unit 130. The communication unit 110 can convert the information / signals stored in the memory into radio signals, and directly send the converted radio signals to other wireless devices or to the BS. The communication unit 110 can receive radio signals from other wireless devices or BSs, and then restore the received radio signals to the original information / signals. The restored information / signals can be stored in the storage unit 130, and can be output as various types (e.g., text, voice, image, video, or tactile) through the I / O unit 140.

[0289] Fig.26 A vehicle or autonomous vehicle according to an embodiment of the present disclosure is shown. The vehicle or autonomous vehicle may be implemented by a mobile robot, a car, a train, a manned / unmanned aerial vehicle (AV), a ship, etc.

[0290] Reference Fig.26 The vehicle or autonomous vehicle (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a drive unit (140a), a power supply unit (140b), a sensor unit (140c) and an autonomous driving unit (140d). The antenna unit (108) may be configured as a part of the communication unit (110). Blocks 110 / 130 / 140a to 140d correspond to Fig.24 Frame 110 / 130 / 140.

[0291] The communication unit 110 may send and receive signals (e.g., data signals and control signals) to and from external devices such as other vehicles, BSs (e.g., gNBs and roadside units), and servers. The control unit 120 may perform various operations by controlling elements of the vehicle or autonomous vehicle 100. The control unit 120 may include an electronic control unit (ECU). The drive unit 140a may cause the vehicle or autonomous vehicle 100 to travel on the road. The drive unit 140a may include an engine, a motor, a transmission system, wheels, brakes, a steering device, etc. The power supply unit 140b may supply power to the vehicle or autonomous vehicle 100, and may include a wired / wireless charging circuit, a battery, etc. The sensor unit 140c may acquire vehicle status, external environment information, user information, etc. The sensor unit 140c may include an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, a slope sensor, a weight sensor, a heading sensor, a position module, a vehicle forward / reverse sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, a lighting sensor, a pedal position sensor, etc. The autonomous driving unit 140d may implement a technology for maintaining a lane in which the vehicle is traveling, a technology for automatically adjusting a speed (e.g., adaptive cruise control), a technology for autonomously driving along a determined path, a technology for driving by automatically setting a path when a destination is set, and the like.

[0292] For example, the communication unit 110 may receive map data, traffic information data, etc. from an external server. The autonomous driving unit 140d may generate an autonomous driving path and a driving plan from the acquired data. The control unit 120 may control the drive unit 140a so that the vehicle or the autonomous driving vehicle 100 may move along the autonomous driving path according to the driving plan (e.g., speed / direction control). In the middle of autonomous driving, the communication unit 110 may aperiodically / periodically acquire the most recent traffic information data from an external server and acquire surrounding traffic information data from adjacent vehicles. In the middle of autonomous driving, the sensor unit 140c may acquire vehicle status and / or surrounding environment information. The autonomous driving unit 140d may update the autonomous driving path and driving plan based on the newly acquired data / information. The communication unit 110 may transmit information about the vehicle position, autonomous driving path, and / or driving plan to an external server. The external server may predict traffic information data using AI technology, etc. based on information collected from the vehicle or autonomous driving vehicle, and provide the predicted traffic information data to the vehicle or autonomous driving vehicle.

[0293] The claims in this specification may be combined in various ways. For example, the technical features in the method claims of this specification may be combined to be implemented or performed in a device, and the technical features in the device claims may be combined to be implemented or performed in a method. In addition, the technical features in (one or more) method claims and (one or more) device claims may be combined to be implemented or performed in a device. In addition, the technical features in (one or more) method claims and (one or more) device claims may be combined to be implemented or performed in a method.

Claims

1. A method for performing wireless communication by a first device, the method comprising the following steps: receiving a configuration authorization from a base station; Sending a first physical sub-link control channel PSCCH or a first physical sub-link shared channel PSSCH to a second device through the first sub-link resource allocated by the configuration authorization; receiving a dynamic grant from the base station via a physical downlink control channel (PDCCH), The dynamic authorization includes a first HARQ process ID related to the first secondary link resource and index information of the configuration authorization related to the dynamic authorization, wherein the configuration authorization is identified based on the index information, and wherein the first secondary link resource associated with the first HARQ process ID is identified based on the configuration grant and the first HARQ process ID; and Based on having transmitted the first PSCCH or the first PSSCH using the first sub-link resources, the first PSCCH or the first PSSCH is retransmitted to the second device through the second sub-link resources allocated by the dynamic grant.

2. The method according to claim 1, further comprising the steps of: receiving hybrid automatic repeat request HARQ feedback information related to the first PSCCH or the first PSSCH from the second device; as well as The HARQ feedback information is reported to the base station through a physical uplink control channel PUCCH.

3. The method according to claim 2, wherein: The secondary link control information SCI including the second HARQ process ID is sent to the second device through the first PSCCH or the first PSSCH, and The second HARQ process ID is independent of the first HARQ process ID.

4. The method according to claim 3, wherein: The second HARQ process ID is reported to the base station together with the HARQ feedback information.

5. The method according to claim 4, wherein: The first HARQ process ID is determined as the second HARQ process ID.

6. The method according to claim 1, wherein: The downlink control information DCI related to the dynamic grant includes at least one of a field for a HARQ process ID, a field for an index of the configuration grant, or a new data indicator NDI field.

7. The method according to claim 6, wherein: A value of the field for the HARQ process ID is a value for a preconfigured HARQ process ID among a plurality of HARQ process IDs.

8. The method according to claim 1, wherein: The maximum value of the number of first HARQ process IDs is configured.

9. The method according to claim 1, wherein: Based on the configuration grant being configured as configuration grant type 1 and configuration grant type 2 at the same time, the HARQ process ID allocated to the configuration grant type 1 and the HARQ process ID allocated to the configuration grant type 2 are independently configured.

10. The method according to claim 1, wherein: A maximum number of retransmissions associated with the first sub-link resource allocated by the configuration grant is preconfigured.

11. The method according to claim 10, wherein: The maximum number of retransmissions includes the number of times the first PSCCH or the first PSSCH is retransmitted to the second device through the second sublink resource allocated by the dynamic grant.

12. The method according to claim 10, wherein: The maximum number of retransmissions does not include the number of times the second PSCCH or the second PSSCH is transmitted through the side link resources allocated by the dynamic grant.

13. The method according to claim 1, wherein: The first HARQ process ID is determined based on a preconfigured formula.

14. A first device configured to perform wireless communication, the first device comprising: one or more memories storing instructions; one or more transceivers; as well as one or more processors connected to the one or more memories and the one or more transceivers, wherein the one or more processors execute the instructions to: receiving a configuration authorization from a base station; Sending a first physical sub-link control channel PSCCH or a first physical sub-link shared channel PSSCH to a second device through the first sub-link resource allocated by the configuration authorization; receiving a dynamic grant from the base station via a physical downlink control channel (PDCCH), The dynamic authorization includes a first HARQ process ID related to the first secondary link resource and index information of the configuration authorization related to the dynamic authorization, wherein the configuration authorization is identified based on the index information, and wherein the first sublink resource associated with the first HARQ process ID is identified based on the configuration grant and the first HARQ process ID; and Based on having transmitted the first PSCCH or the first PSSCH using the first sub-link resources, the first PSCCH or the first PSSCH is retransmitted to the second device through the second sub-link resources allocated by the dynamic grant.

15. A device configured to control a first user equipment UE, the device comprising: one or more processors; as well as one or more memories operatively connected to the one or more processors and storing instructions, wherein the one or more processors execute the instructions to: receiving a configuration authorization from a base station; Sending a first physical sidelink control channel PSCCH or a first physical sidelink shared channel PSSCH to a second UE through a first sidelink resource allocated by the configuration authorization; receiving a dynamic grant from the base station via a physical downlink control channel (PDCCH), The dynamic authorization includes a first HARQ process ID related to the first secondary link resource and index information of the configuration authorization related to the dynamic authorization, wherein the configuration authorization is identified based on the index information, and wherein the first sublink resource associated with the first HARQ process ID is identified based on the configuration grant and the first HARQ process ID; and Based on having transmitted the first PSCCH or the first PSSCH using the first sub-link resources, the first PSCCH or the first PSSCH is retransmitted to the second UE through the second sub-link resources allocated by the dynamic grant.

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