Method and apparatus for performing sidelink communication based on sidelink CG resources in NR V2X

Abstract

According to an embodiment of the present disclosure, a method for performing wireless communication by a first device is provided. The method may include the following steps: receiving RRC configuration information about a sidelink CG resource from a base station; sending a PSCCH to a second device via a sidelink transmission resource determined based on the RRC configuration information; and sending a PSSCH associated with the PSCCH to the second device via the sidelink transmission resource.

Description

Technical Field

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

[0002] Sidelink (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 the 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 to V2X communication based on 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, various V2X scenarios may include vehicle platooning, advanced driving, extended sensors, remote driving, etc.

[0009] For example, based on the vehicle queue, the vehicles can move together by dynamically forming a group. For example, in order to perform a platoon operation based on the vehicle queue, the vehicles belonging to the group can receive periodic data from the leading vehicle. For example, the vehicles belonging to the group can reduce or increase the interval between the 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 issues

[0015] The present disclosure provides a communication method between devices (or UEs) based on V2X communication, and a device (or UE) for executing the method.

[0016] The present disclosure provides a method for determining sidelink configuration grant (CG) resources based on radio resource control (RRC) configuration information received from a base station in NR V2X and a device (or UE) performing the method.

[0017] Technical Solution

[0018] In an embodiment, a method for performing wireless communication by a first device is provided. The method may include: receiving radio resource control (RRC) configuration information related to a sidelink configuration grant (CG) resource from a base station; sending a physical sidelink control channel (PSCCH) to a second device through a sidelink transmission resource determined based on the RRC configuration information; and sending a physical sidelink shared channel (PSSCH) related to the PSCCH to the second device through the sidelink transmission resource, wherein the RRC configuration information includes a timing offset for determining a first sidelink CG time slot and a sidelink resource period of a sidelink CG time slot periodically allocated by the base station, and wherein the sidelink transmission resource is determined in units of logical time slots based on the timing offset and the sidelink resource period.

[0019] In an embodiment, a first device is provided, the first device being configured to perform wireless communication. The first device may include: at least one memory storing instructions; at least one transceiver; and at least one processor, the at least one processor being connected to the at least one memory and the at least one transceiver, wherein the at least one processor executes the instructions to: control the at least one transceiver to receive radio resource control (RRC) configuration information related to sidelink configuration grant (CG) resources from a base station; control the at least one transceiver to send a physical sidelink control channel (PSCCH) to a second device through a sidelink transmission resource determined based on the RRC configuration information; and control the at least one transceiver to send a physical sidelink shared channel (PSSCH) related to the PSCCH to the second device through the sidelink transmission resource, wherein the RRC configuration information includes a timing offset for determining a first sidelink CG time slot and a sidelink resource period of a sidelink CG time slot periodically allocated by the base station, and wherein the sidelink transmission resource is determined in units of logical time slots based on the timing offset and the sidelink resource period.

[0020] In an embodiment, a device (or chip (group)) is provided, which is configured to control a first user equipment (UE). The device may include: at least one processor; and at least one memory, the at least one memory is connected to the at least one processor and stores instructions, wherein the at least one processor executes the instructions to: receive radio resource control (RRC) configuration information related to sidelink configuration grant (CG) resources from a base station; send a physical sidelink control channel (PSCCH) to a second device through a sidelink transmission resource determined based on the RRC configuration information; and send a physical sidelink shared channel (PSSCH) related to the PSCCH to the second device through the sidelink transmission resource, wherein the RRC configuration information includes a timing offset for determining a first sidelink CG time slot and a sidelink resource period of a sidelink CG time slot periodically allocated by the base station, and wherein the sidelink transmission resource is determined in units of logical time slots based on the timing offset and the sidelink resource period.

[0021] In an embodiment, a non-transitory computer-readable storage medium storing instructions (or commands) is provided. When the instructions are executed, the non-transitory computer-readable storage medium causes a first device to: receive radio resource control (RRC) configuration information related to a sidelink configuration grant (CG) resource from a base station; send a physical sidelink control channel (PSCCH) to a second device through a sidelink transmission resource determined based on the RRC configuration information; and send a physical sidelink shared channel (PSSCH) related to the PSCCH to the second device through the sidelink transmission resource, wherein the RRC configuration information includes a timing offset for determining a first sidelink CG time slot and a sidelink resource period of a sidelink CG time slot periodically allocated by the base station, and wherein the sidelink transmission resource is determined in units of logical time slots based on the timing offset and the sidelink resource period.

[0022] In an embodiment, a method for performing wireless communication by a second device is provided. The method may include: receiving a PSCCH from a first device through a sidelink transmission resource determined based on RRC configuration information related to a sidelink CG resource; and receiving a PSSCH related to the PSCCH from the first device through the sidelink transmission resource, wherein the RRC configuration information is sent from the base station and received by the first device, wherein the RRC configuration information includes a timing offset for determining a first sidelink CG time slot and a sidelink resource period of a sidelink CG time slot periodically allocated by the base station, and wherein the sidelink transmission resource is determined in units of logical time slots based on the timing offset and the sidelink resource period.

[0023] In an embodiment, a second device is provided, the second device being configured to perform wireless communication. The second device may include: at least one memory storing instructions; at least one transceiver; and at least one processor, the at least one processor being connected to the at least one memory and the at least one transceiver, wherein the at least one processor executes the instructions to: control the at least one transceiver to receive a PSCCH from a first device through a sidelink transmission resource determined based on RRC configuration information related to a sidelink CG resource; and control the at least one transceiver to receive a PSSCH related to the PSCCH from the first device through the sidelink transmission resource, wherein the RRC configuration information is sent from the base station and received by the first device, wherein the RRC configuration information includes a timing offset for determining a first sidelink CG time slot and a sidelink resource period of a sidelink CG time slot periodically allocated by the base station, and wherein the sidelink transmission resource is determined in units of logical time slots based on the timing offset and the sidelink resource period.

[0024] Effects of the Invention

[0025] Based on the present disclosure, V2X communication between devices (or UEs) can be effectively performed.

[0026] Based on the present disclosure, the side link CG resources can be effectively determined in NR V2X based on the RRC configuration information received from the base station.

[0027] Based on the present disclosure, the first device may determine the sidelink transmission resources in units of logical time slots based on the timing offset and the sidelink resource period included in the RRC configuration information received from the base station. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a diagram for describing NR-based V2X communication compared to V2X communication based on RAT used before NR.

[0029] Figure 2 The structure of the NR system according to an embodiment of the present disclosure is shown.

[0030] Figure 3 The functional division between NG-RAN and 5GC according to an embodiment of the present disclosure is shown.

[0031] Figure 4a and Figure 4b A radio protocol architecture according to an embodiment of the present disclosure is shown.

[0032] Figure 5 The structure of the NR system according to an embodiment of the present disclosure is shown.

[0033] Figure 6 The structure of the time slot of the NR frame according to an embodiment of the present disclosure is shown.

[0034] Figure 7 An example of a BWP according to an embodiment of the present disclosure is shown.

[0035] Figure 8a and Figure 8b A radio protocol architecture for SL communication based on an embodiment of the present disclosure is shown.

[0036] Fig. 9 A UE performing V2X or SL communication according to an embodiment of the present disclosure is shown.

[0037] Fig.10a and Fig.10b A process in which a UE performs V2X or SL communication based on a transmission mode according to an embodiment of the present disclosure is shown.

[0038] Figures 11a to 11c Three broadcast types based on embodiments of the present disclosure are shown.

[0039] Fig.12 An example is shown in which the first device reports the sidelink HARQ ACK for the sidelink CG to the base station on the PUCCH.

[0040] Fig.13 Examples of PSFCH to PUCCH transmission timing for synchronous and asynchronous cases are shown.

[0041] Fig.14 An example of a process in which a base station, a first device, and a second device perform wireless communication based on an embodiment of the present disclosure is shown.

[0042] Fig.15 is a flowchart illustrating the operation of the first device according to an embodiment of the present disclosure.

[0043] Fig.16 is a flowchart illustrating the operation of the second device according to an embodiment of the present disclosure.

[0044] Fig.17 A communication system 1 according to an embodiment of the present disclosure is shown.

[0045] Fig.18 A wireless device according to an embodiment of the present disclosure is shown.

[0046] Fig.19 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown.

[0047] Fig. 20 A wireless device according to an embodiment of the present disclosure is shown.

[0048] Fig.21 A handheld device according to an embodiment of the present disclosure is shown.

[0049] Fig. 22 A vehicle or autonomous vehicle according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0050] 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".

[0051] 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".

[0052] 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".

[0053] 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".

[0054] 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".

[0055] The technical features described in each of the drawings in this specification may be implemented separately or simultaneously.

[0056] 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.

[0057] 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.

[0058] 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 are not limited thereto.

[0059] 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.

[0060] 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.

[0061] Figure 2 The embodiment of the present invention illustrates a case where only gNB is included. The BSs 20 may be connected to each other via an Xn interface. The BSs 20 may be connected to each other via a fifth generation (5G) core network (5GC) and an NG interface. More specifically, the BSs 20 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.

[0062] Figure 3 The functional division between NG-RAN and 5GC according to an embodiment of the present disclosure is shown.

[0063] 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.

[0064] 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.

[0065] Figure 4a and Figure 4b A radio protocol architecture according to an embodiment of the present disclosure is shown. Figure 4a and Figure 4b The embodiments of can be combined with various embodiments of the present disclosure. Specifically, Figure 4a shows the radio protocol architecture for the user plane, and Figure 4b The radio protocol architecture for the control plane is shown. 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.

[0066] Reference Figure 4a and Figure 4b , the physical layer provides information transfer services to the upper layer through a physical channel. The physical layer is connected to the medium access control (MAC) layer, which is the upper layer of the physical layer, through a transport channel. Data is transferred between the MAC layer and the physical layer through the transport channel. Transport channels are classified according to how data is sent through the radio interface and what characteristics the data has to be sent through the radio interface.

[0067] 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.

[0068] The MAC layer provides services to the Radio Link Control (RLC) layer via logical channels, which 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.

[0069] 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).

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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).

[0080] 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).

[0081] The following table 1 shows the number of symbols (N) per time slot according to the SCS setting (u) when the normal CP is adopted. slot symb ), the number of time slots per frame (N frame,u slot ) and the number of time slots per subframe (N subframe,u slot ).

[0082] [Table 1]

[0083] <![CDATA[SCS(15*2 u )]]> <![CDATA[N slot symb ]]> <![CDATA[N frame,u slot ]]> <![CDATA[N subframe,u slot ]]> 15KHz(u=0) 14 10 1 30KHz(u=1) 14 20 2 60KHz(u=2) 14 40 4 120KHz(u=3) 14 80 8 240KHz(u=4) 14 160 16

[0084] 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.

[0085] [Table 2]

[0086] <![CDATA[SCS(15*2 u )]]> <![CDATA[N slot symb ]]> <![CDATA[N frame,u slot ]]> <![CDATA[N subframe,u slot ]]> 60KHz(u=2) 12 40 4

[0087] 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.

[0088] 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.

[0089] 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).

[0090] [Table 3]

[0091] Frequency range specification Corresponding frequency range Subcarrier Spacing (SCS) FR1 450MHz–6000MHz 15, 30, 60kHz FR2 24250MHz–52600MHz 60, 120, 240kHz

[0092] 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).

[0093] [Table 4]

[0094] Frequency range specification Corresponding frequency range Subcarrier Spacing (SCS) FR1 410MHz–7125MHz 15, 30, 60kHz FR2 24250MHz–52600MHz 60, 120, 240kHz

[0095] Figure 6 The structure of the time slot of the NR frame according to an embodiment of the present disclosure is shown.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] Hereinafter, the bandwidth part (BWP) and the carrier will be described in detail.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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 a 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 the 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.

[0104] 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 SL BWP 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 NR V2X UEs and RRC_IDLE UEs out of coverage. For UEs operating in RRC_CONNECTED mode, at least one SL BWP can be activated within the carrier.

[0105] Figure 7 An example of a BWP according to an embodiment of the present disclosure is shown. Figure 7The embodiments of can be combined with various embodiments of the present disclosure. Assume that Figure 7 In the embodiment, the number of BWPs is 3.

[0106] 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.

[0107] 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.

[0108] Hereinafter, V2X or SL communication will be described.

[0109] Figure 8a and Figure 8b A radio protocol architecture for SL communication based on an embodiment of the present disclosure is shown. Figure 8a and Figure 8b The embodiments of can be combined with various embodiments of the present disclosure. More specifically, Figure 8a shows the user plane protocol stack, and Figure 8b The control plane protocol stack is shown.

[0110] Hereinafter, a side link synchronization signal (SLSS) and synchronization information will be described.

[0111] The SLSS may include a primary side link synchronization signal (PSSS) and a secondary side link synchronization signal (SSSS) as SL specific sequences. The PSSS may be referred to as a side link primary synchronization signal (S-PSS), and the SSSS may be referred to as a side 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 for synchronization acquisition. For example, the UE may use the S-PSS and the S-SSS for acquiring detailed synchronization and for detecting a synchronization signal ID.

[0112] The physical sidelink broadcast channel (PSBCH) can be a (broadcast) channel for sending default (system) information, which the UE must first know 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.

[0113] S-PSS, S-SSS, and PSBCH can be included in a block format that supports periodic transmission (e.g., SL synchronization signal (SS) / PSBCH block, hereinafter, sidelink synchronization signal block (S-SSB)). The S-SSB can have the same parameter set (i.e., SCS and CP length) as the physical sidelink control channel (PSCCH) / physical sidelink shared channel (PSSCH) in the carrier, and the transmission bandwidth can exist within the (pre-) configured sidelink (SL) BWP. For example, the S-SSB can have a bandwidth of 11 resource blocks (RBs). For example, the PSBCH can exist across 11 RBs. In addition, the frequency position of the S-SSB can be (pre-) configured. Therefore, the UE does not have to perform hypothesis detection at the frequency to discover the S-SSB in the carrier.

[0114] 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.

[0115] Reference Fig. 9 In V2X or SL communication, the term "UE" may generally refer to a UE of a user. 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.

[0116] For example, UE 1 may select a resource unit corresponding to a specific resource in a resource pool that means a collection of a series of resources. 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.

[0117] 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.

[0118] Generally, a resource pool may consist of multiple resource units, and each UE may select one or more resource units for its SL signal transmission.

[0119] Hereinafter, resource allocation in SL will be described.

[0120] Fig.10a and Fig.10b A process in which a UE performs V2X or SL communication based on a transmission mode according to an embodiment of the present disclosure is shown. Fig.10a and Fig.10b 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.

[0121] For example, Fig.10a UE operations related to LTE transmission mode 1 or LTE transmission mode 3 are shown. Alternatively, for example, Fig.10a UE operations related to NR resource allocation mode 1 are shown. For example, LTE transmission mode 1 can be applied to conventional SL communication, and LTE transmission mode 3 can be applied to V2X communication.

[0122] For example, Fig.10b UE operations related to LTE transmission mode 2 or LTE transmission mode 4 are shown. Alternatively, for example, Fig.10b UE operations associated with NR resource allocation mode 2 are shown.

[0123] Reference Fig.10a , 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).

[0124] Reference Fig.10b, 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 may be a resource pool. For example, the UE may autonomously select or schedule resources for SL transmission. For example, the UE may perform SL communication by autonomously selecting resources in the configured resource pool. For example, the UE may autonomously select resources within a selection window by performing a sensing and resource (re)selection process. For example, sensing may be performed in units of subchannels. In addition, UE 1, which has autonomously selected resources within the resource pool, may send SCI to UE 2 via PSCCH, and may thereafter send data based on the SCI to UE 2 via PSSCH.

[0125] Figures 11a to 11c Three broadcast types based on embodiments of the present disclosure are shown. Figures 11a to 11c The embodiments of can be combined with various embodiments of the present disclosure. Specifically, Fig.11a shows a broadcast type SL communication, Fig.11b shows a unicast type SL communication, and Fig.11c A multicast type SL communication is shown. In the case of a unicast type SL communication, the UE can perform one-to-one communication with another UE. In the case of a multicast type 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, the SL groupcast communication may be replaced by SL multicast communication, SL one-to-many communication, etc.

[0126] In addition, in SL communication, the UE needs to efficiently select resources for SL transmission. Hereinafter, based on various embodiments of the present disclosure, a method for the UE to efficiently select resources for SL transmission and a device supporting the method will be described. In various embodiments of the present disclosure, SL communication may include V2X communication.

[0127] At least one of the methods proposed in various embodiments of the present disclosure may be applied to at least one of unicast communication, multicast communication and / or broadcast communication.

[0128] At least one of the methods proposed based on various embodiments of the present disclosure can be applied not only to SL communication or V2X communication based on PC5 interface or SL interface (for example, PSCCH, PSSCH, PSBCH, PSSS / SSSS, etc.), but also to SL communication or V2X communication based on Uu interface (for example, PUSCH, PDSCH, PDCCH, PUCCH, etc.).

[0129] In various embodiments of the present disclosure, the receiving operation of the UE may include a decoding operation and / or a receiving operation of a SL channel and / or a SL signal (e.g., PSCCH, PSSCH, PSFCH, PSBCH, PSSS / SSSS, etc.). The receiving operation of the UE may include a decoding operation and / or a receiving operation of a WAN DL channel and / or a WAN DL signal (e.g., PDCCH, PDSCH, PSS / SSS, etc.). The receiving operation of the UE may include a sensing operation and / or a channel busy ratio (CBR) measurement operation. In various embodiments of the present disclosure, the sensing operation of the UE may include a PSSCH-RSRP measurement operation based on a PSSCH DM-RS sequence, a PSSCH-RSRP measurement operation based on a PSSCH DM-RS sequence scheduled by a PSCCH successfully decoded by the UE, a side link RSSI (S-RSSI) measurement operation, and / or an S-RSSI measurement operation based on a subchannel related to a V2X resource pool. In various embodiments of the present disclosure, the transmission operation of the UE may include the transmission operation of the SL channel and / or the SL signal (e.g., PSCCH, PSSCH, PSFCH, PSBCH, PSSS / SSSS, etc.). The transmission operation may include the transmission operation of the WAN UL channel and / or the WAN UL signal (e.g., PUSCH, PUCCH, SRS, etc.). In various embodiments of the present disclosure, the synchronization signal may include SLSS and / or PSBCH.

[0130] In various embodiments of the present disclosure, configuration may include signaling, signaling from the network, configuration from the network, and / or pre-configuration from the network. In various embodiments of the present disclosure, definition may include signaling, signaling from the network, configuration from the network, and / or pre-configuration from the network. In various embodiments of the present disclosure, specification may include signaling, signaling from the network, configuration from the network, and / or pre-configuration from the network.

[0131] In various embodiments of the present disclosure, the ProSe per-packet priority (PPPP) may be replaced by the ProSe per-packet reliability (PPPR), and the PPPR may be replaced by the PPPP. For example, when the PPPP value becomes smaller, this may indicate a high priority, and when the PPPP value becomes larger, this may indicate a low priority. For example, when the PPPR value becomes smaller, this may indicate a high reliability, and when the PPPR value becomes larger, this may indicate a low reliability. For example, the PPPP value associated with a service, packet, or message associated with a high priority may be smaller than the PPPP value associated with a service, packet, or message associated with a low priority. For example, the PPPR value associated with a service, packet, or message associated with a high reliability may be smaller than the PPPR value associated with a service, packet, or message associated with a low reliability.

[0132] Furthermore, in the present disclosure, a high priority may mean a small priority value, and a low priority may mean a large priority. For example, Table 5 shows an example of priority.

[0133] [Table 5]

[0134] Service or logical channel Priority value Service A or Logical Channel A 1 Service B or logical channel B 2 Service C or logical channel C 3

[0135] Referring to Table 5, for example, service A or logical channel A associated with the smallest priority value may have the highest priority. For example, service C or logical channel C associated with the largest priority value may have the lowest priority.

[0136] In various embodiments of the present disclosure, a session may include at least one of a unicast session (e.g., a unicast session for SL), a groupcast / multicast session (e.g., a multicast / multicast session for SL), and / or a broadcast session (e.g., a broadcast session for SL).

[0137] In various embodiments of the present disclosure, a carrier may be replaced with at least one of a BWP and / or a resource pool, and vice versa. For example, a carrier may include at least one of a BWP and / or a resource pool. For example, a carrier may include one or more BWPs. For example, a BWP may include one or more resource pools.

[0138] Meanwhile, in sidelink (SL) mode-1 operation, when a base station sets a DCI SL HARQ process ID for a configured grant (CG) or a dynamic grant (DG) resource used by a UE for SL communication through radio resource control (RRC) or downlink control information (DCI), the TX UE interprets the DCI SL HARQ process ID for a specific transport block (TB) transmission assigned to the TX UE by the base station differently from the base station, or there may be ambiguity when interpreting the SCI SL HARQ process ID sent by the TX UE through the SCI for SL communication as a TB transmission different from the TB to be transmitted indicated by the DCI SL HARQ process ID set by the base station to the TX UE. The present disclosure eliminates such ambiguity and proposes a method for efficiently allocating / determining a DCI SL HARQ process ID in SL mode-1 operation.

[0139] In the present disclosure, y=floor(x) may be a function that derives the maximum integer among real numbers less than x. In the present disclosure, y=(x)modulo(z) may be a function that derives a remainder obtained by dividing x by z.

[0140] Based on the embodiment of the present disclosure, the DCI SL HARQ process ID may be determined or obtained by the following Equation 1. For example, the base station may determine or set the DCI SL HARQ process ID based on Equation 1.

[0141] [Equation 1]

[0142] DCI SL HARQ process ID=[floor(CURRENT_symbol / periodicity)]modulonrofHARQ-Processes

[0143] in:

[0144] CURRENT_symbol = (SFN × numberOfSlotsPerFrame × numberOfSym bolsPerSlot + number of slots in a frame × numberOfSymbolsPerSlot + number of symbols in a slot)

[0145] numberOfSlotsPerFrame = number of slots per frame

[0146] numberOfSymbolsPerSlot = number of symbols per slot

[0147] nrofHARQ-Processes = Number of HARQ processes configured for SPS

[0148] periodicity = periodicity of configuration permissions for SPS

[0149] In this case, for example, the time slot and symbol may be a physical time slot and a physical symbol to which a downlink (DL) parameter set is applied. For example, the time slot and symbol may be a physical time slot and a physical symbol to which a SL parameter set is applied. For example, the time slot and symbol may be a logical time slot and a logical symbol to which a SL parameter set is applied. For example, the periodicity may be the number of physical symbols to which a DL parameter set is applied. For example, the periodicity may be the number of physical symbols to which a SL parameter set is applied. For example, the periodicity may be the number of logical symbols to which a SL parameter set is applied.

[0150] Equation 1 is an example of configuring periodicity in symbol units. Meanwhile, in SL communication, the minimum resource allocation unit may be a time slot unit. Therefore, based on an embodiment of the present disclosure, the DCI SL HARQ process ID may be determined or obtained in time slot units by Equation 2. For example, the base station may determine or set the DCI SL HARQ process ID based on the following Equation 2.

[0151] [Equation 2]

[0152] DCI SL HARQ process ID=[floor(CURRENT_slot / periodicity)]modulo nrofHARQ-Processes

[0153] in:

[0154] CURRENT_slot = (SFN × numberOfSlotsPerFrame + number of slots in a frame)

[0155] numberOfSlotsPerFrame = number of slots per frame

[0156] nrofHARQ-Processes = Number of HARQ processes configured for SPS

[0157] periodicity = periodicity of configuration permissions for SPS

[0158] In this case, for example, the time slot may be a physical time slot to which the DL parameter set is applied. For example, the time slot may be a physical time slot to which the SL parameter set is applied. For example, the time slot may be a logical time slot to which the SL parameter set is applied. For example, the periodicity may be the number of physical time slots to which the DL parameter set is applied. For example, the periodicity may be the number of physical time slots to which the SL parameter set is applied. For example, the periodicity may be the number of logical time slots to which the SL parameter set is applied.

[0159] Based on the embodiments of the present disclosure, the SCI SL HARQ process ID may be determined or obtained through Equation 3. For example, the UE may determine or set the SCI SL HARQ process ID based on Equation 3.

[0160] [Equation 3]

[0161] SCI SL HARQ process ID=[floor(CURRENT_symbol / periodicity)]modulonrofHARQ-Processes

[0162] in:

[0163] CURRENT_symbol = (SFN × numberOfSlotsPerFrame × numberOfSymbolsPerSlot + number of slots in a frame × numberOfSymbolsPerSlot + number of symbols in a slot)

[0164] numberOfSlotsPerFrame = number of slots per frame

[0165] numberOfSymbolsPerSlot = number of symbols per slot

[0166] nrofHARQ-Processes = Number of HARQ processes configured for SPS

[0167] periodicity = periodicity of configuration permissions for SPS

[0168] In this case, for example, the time slot and the symbol may be a physical time slot and a physical symbol to which the DL parameter set is applied. For example, the time slot and the symbol may be a physical time slot and a physical symbol to which the SL parameter set is applied. For example, the time slot and the symbol may be a logical time slot and a logical symbol to which the SL parameter set is applied. For example, the periodicity may be the number of physical symbols to which the DL parameter set is applied. For example, the periodicity may be the number of physical symbols to which the SL parameter set is applied. For example, the periodicity may be the number of logical symbols to which the SL parameter set is applied.

[0169] Equation 3 is an example of configuring periodicity in symbol units. Meanwhile, in SL communication, the minimum resource allocation unit may be a time slot unit. Therefore, based on an embodiment of the present disclosure, the SCI SL HARQ process ID may be determined or obtained in time slot units through Equation 4. For example, the UE may determine or set the SCI SL HARQ process ID based on Equation 4.

[0170] [Equation 4]

[0171] SCI SL HARQ process ID=[floor(CURRENT_slot / periodicity)]modulo nrofHARQ-Processes

[0172] in:

[0173] CURRENT_slot = (SFN × numberOfSlotsPerFrame + number of slots in a frame)

[0174] numberOfSlotsPerFrame = number of slots per frame

[0175] nrofHARQ-Processes = Number of HARQ processes configured for SPS

[0176] periodicity = periodicity of configuration permissions for SPS

[0177] In this case, for example, the time slot may be a physical time slot to which the DL parameter set is applied. For example, the time slot may be a physical time slot to which the SL parameter set is applied. For example, the time slot may be a logical time slot to which the SL parameter set is applied. For example, the periodicity may be the number of physical time slots to which the DL parameter set is applied. For example, the periodicity may be the number of physical time slots to which the SL parameter set is applied. For example, the periodicity may be the number of logical time slots to which the SL parameter set is applied.

[0178] Alternatively, for example, the SCI SL HARQ process ID sent by the UE through the SCI for SL communication may be set to be the same as the DCI SL HARQ process ID set by the base station to the UE through the DCI. For example, the UE may set or determine the SCI SL HARQ process ID to be the same as the DCI SL HARQ process ID set by the base station.

[0179] Alternatively, for example, the UE may set or determine the SCI SL HARQ process ID independently of the DCI SL HARQ process ID set by the base station. For example, the UE may randomly set or determine the SCI SL HARQ process ID. This may be an implementation issue of the UE.

[0180] In this case, the UE may use all or part of the UL resources of a time division duplex (TDD)-based carrier as SL resources. Therefore, the symbol and slot index for the Uu link and the symbol and slot index for the SL may not match each other. That is, the DL or SL physical slot index and the DL or SL physical symbol index may not match the SL logical slot index and the logical symbol index. In this case, the DCI SL HARQ process ID is used to correlate the CG or DG resources used for the initial transmission of the TB with the DG resources used for retransmission of the TB by the base station. That is, by configuring the second DCI SL HARQ process ID included in the DCI for retransmission resource allocation to be the same as the first DCI SL HARQ process ID included in the DCI for initial transmission resource allocation, the base station can limit the UE to transmit only the TB for which the initial transmission failed through the corresponding retransmission resources. For example, if the UE receives an initial transmission resource-related DCI including a first DCI SL HARQ process ID and a retransmission resource-related DCI including a second DCI SL HARQ process ID from a base station, and if the second DCI SL HARQ process ID is the same as the first DCI SL HARQ process ID, the UE can send only the TB for which the initial transmission failed through the retransmission resources.

[0181] In this case, if the TX UE randomly sets the SCI SL HARQ process ID sent for SL communication, the TX UE can use the SCI SL HARQ process ID independent of the DCI SL HARQ process ID set by the base station. However, if the TX UE retransmits a specific TB based on the SCI SL HARQ process ID used for the initial transmission of the specific TB in the SL communication, the TX UE can retransmit the specific TB using the same SCI SL HARQ process ID used for the initial transmission of the specific TB. In addition, the TX UE can toggle the New Data Indicator (NDI) field, and through this, the TX UE should allow the RX UE to know that the retransmission of the TX UE is for the same TB as the specific TB. In addition, the TX UE should allow the RX UE to perform corresponding HARQ combining.

[0182] In this case, as described above, if the base station sets the DCI SL HARQ process ID based on the DL or SL physical slot / symbol index and sends it through DCI because the DL or SL physical slot / symbol index and the SL logical symbol / index are different, and if the TX UE interprets the DCI SL HARQ process ID based on the SL logical slot / symbol index, the interpretation of the DCI SL HARQ process ID may be different between the base station and the UE.

[0183] To solve this problem, since the TX UE knows the difference between the SFN=0 timing and the DFN=0 timing, and the TX UE knows the difference between the SL physical slot / symbol index and the SL logical slot / symbol index included in the SL resource pool, the TX UE can calculate or determine the DCI SL HARQ process ID calculated by the base station based on the DL or SL physical slot / symbol index for the initial transmission of a specific TB or the retransmission of a specific TB by considering all the above differences. In addition, the TX UE can map the DCI SL HARQ process ID to the SCI SL HARQ process ID independently generated by the TX UE for the initial transmission of a specific TB. Thereafter, the TX UE can use the same SCI SL HARQ process ID as the SCI SL HARQ process ID that will be used to retransmit a specific TB through SL communication.

[0184] In some embodiments of the present disclosure, in SL mode-1 operation, the ambiguity of the interpretation of the DCI SL HARQ process ID assigned to the UE by the base station through DCI and the SCI SL HARQ process ID sent by the TX UE to the RX UE through SCI can be removed. Although the SCI SL HARQ process ID is set independently of the DCI SL HARQ process ID, a method for mapping the DCI SL HARQ process ID indicating the initial transmission and retransmission of a specific TB by the TX UE to the SCI SL HARQ process ID is proposed.

[0185] In one embodiment, the DG DCI for retransmission based on SL HARQ feedback may be scrambled by the SL CS RNTI instead of the SL RNTI. An exemplary description of this embodiment is described in Table 6 below.

[0186] [Table 6]

[0187]

[0188] In one embodiment, the CRC of the DG DCI for retransmission based on SL HARQ feedback may be scrambled by the SL CS RNTI.

[0189] In one embodiment, if a HARQ process ID (for example, the HARQ process ID may be different from the SL HARQ process ID actually included / indicated in the SCI, and the HARQ process ID may be used to set a link between a CG resource with a specific index and a retransmission resource allocated by the DG) is included in the CG DCI, the HARQ process ID may be used for the purpose of providing link information between the CG resource and the retransmission resource allocated by the DG. To this end, the HARQ process ID information may also be included in the DG DCI for allocating retransmission resources. For example, the base station may send a DG DCI for allocating retransmission resources to the UE, and the DG DCI may include the HARQ process ID. Here, for example, the HARQ process ID used for this purpose may be configured by the base station / network to a value that does not overlap between different CGs. For example, specifically, if each CG uses / allows only one SL HARQ process, the base station / network may set or determine the HARQ process ID to a value that does not overlap between different CGs.

[0190] In embodiments regarding SL HARQ feedback, multiplexing of SL HARQ and Uu UCI on PUCCH or PUSCH may not be supported. In this case, it is necessary to define a method for handling the case where SL HARQ timing overlaps with UCI in the same situation. Since the PUCCH transmission timing for SPS PDSCH and the CG for the side link will not change dynamically, conflicts between feedbacks of different links will not be completely prevented.

[0191] In the UL-SL priority rule for power control or discarding of simultaneous SL and UL transmission according to the example, the priority of SL HARQ on PUCCH or PUSCH may be the same as the priority of SL HARQ of the corresponding PSFCH. On the other hand, the priority of UCI may not be defined. In this case, the LTE principle may be reused to discard SL HARQ or Uu UCI. Specifically, if the priority of SL HARQ on PUCCH or PUSCH is less than the higher layer parameter sl-PriorityThreshold, SL HARQ feedback may be sent on PUCCH or PUSCH, and Uu UCI may be discarded. Otherwise, Uu UCI may be sent on PUCCH or PUSCH, and SL HARQ feedback may be discarded. The following Tables 7 to 11 are examples directly or indirectly related to the present embodiment.

[0192] Table 7 below relates to the discarding rules for handling when the SL HARQ-ACK report overlaps with the UCI.

[0193] [Table 7]

[0194]

[0195] Table 8 below relates to multiple SL HARQ-ACKs in a single PUCCH resource in case of type 1 codebook.

[0196] [Table 8]

[0197]

[0198] The following Table 9 relates to multiple SL HARQ ACKs in a single PUCCH resource in the case of Type-2 codebook.

[0199] [Table 9]

[0200]

[0201]

[0202] Table 10 below relates to timing and resources for PUCCH.

[0203] [Table 10]

[0204]

[0205] Table 11 below relates to timing and resources for PUCCH.

[0206] [Table 11]

[0207]

[0208] Fig.12 An example is shown in which the first device reports the sidelink HARQ ACK for the sidelink CG to the base station on the PUCCH.

[0209] In one embodiment, in unicast and / or multicast cases, if the TX UE does not receive (SLHARQ feedback) due to priority, the TX UE may report HARQ NACK to the gNB.

[0210] Regarding the CG, the TX UE may or may not send PSCCH / PSSCH to the RX UE. In this case, since the RX UE does not receive PSCCH and PSSCH from the TX UE, the RX UE may not send PSFCH. Thereafter, if a NACK for the SL resource set configured within the period is reported to the gNB, the gNB may make an incorrect decision when scheduling retransmission resources or modifying the configured SL resources. In this regard, if Fig.12 As shown, if PSCCH / PSSCH is not transmitted in the resource set within the period used for CG, a method in which the TX UE reports ACK can be considered.

[0211] If the TX UE reports ACK to the gNB when PSCCH / PSSCH is not sent in the resource set within the period used for the CG, the maximum number of HARQ (re)transmissions for the TB can be used to decide the SL HARQ-ACK to be reported to the gNB. Specifically, the gNB cannot know the start timing of the TB transmission of the TX UE because the TX UE can use any resource opportunity of the configured permission for the initial transmission of its TB. In other words, the gNB cannot know how many transmissions have been performed for the TB on the TX UE side. At this time, the number of (re)transmissions of a certain TB reaches the configured maximum value, and the TX UE does not need to have additional resources for the retransmission of the TB. In other words, for this case, the TX UE can report ACK to the gNB regardless of whether the TX UE receives the PSFCH carrying ACK for the TB.

[0212] In one embodiment, if the maximum number of HARQ retransmissions for a TB is configured, the TX UE reports ACK to the gNB when the maximum number of HARQ retransmissions for the TB is reached.

[0213] Fig.13 Examples of PSFCH to PUCCH transmission timing for synchronous and asynchronous cases are shown.

[0214] In an embodiment, the assumptions shown in the following Table 12 may be applied to define the PUCCH transmission timing.

[0215] [Table 12]

[0216]

[0217]

[0218] According to an embodiment, for the synchronous case where the SL slot boundary is aligned with the Uu slot boundary, there is no ambiguity in the timing of PUCCH transmissions between the UE and the gNB. On the other hand, for the asynchronous case where the SL slot boundary is not aligned with the Uu slot boundary, it is necessary to define how the gNB and the UE have the same understanding of the timing of PUCCH transmissions. In addition, the gNB may not know which synchronization reference resource the UE selects. On the other hand, the UE knows both the Uu slot boundary and the SL slot boundary.

[0219] First, the gNB always assumes synchronization to indicate the PUCCH transmission timing and receive the PUCCH sent by the UE. On the other hand, the UE reinterprets the indicated PSFCH to PUCCH transmission timing according to the time difference between the Uu slot boundary and the SL slot boundary. For example, refer to Fig.13 , the gNB assumes that the SL slot boundary is aligned with the Uu slot boundary and sets the value of PSFCH to PUCCH timing to 10. In this case, when the UE is in the synchronous case, the UE will send PUCCH after 10 UL slots after PSFCH reception. On the other hand, when the UE is in the asynchronous case, the UE will compensate the value of PSFCH to PUCCH timing according to the time difference between the PSFCH reception time for the synchronous case and the actual PSFCH reception time. In this example, the UE changes the PSFCH to PUCCH timing from 10 slots to 6 slots. In this case, the gNB and UE can have the same understanding of PUCCH transmission timing even for the asynchronous case.

[0220] In one embodiment, when the SL slot boundary and the UL slot boundary are not aligned, the reference point for PSFCH to PUCCH timing is determined based on:

[0221] Step 1: The UE determines the virtual PSFCH reception time based on the timing of the serving cell associated with the SL DCI reception.

[0222] Step 2: The UE assumes that k=0 corresponds to the last time slot of PUCCH transmission overlapping with the last virtual PSFCH reception opportunity.

[0223] Meanwhile, in an embodiment, DCI format 3_0 may be associated with the following Table 13.

[0224] [Table 13]

[0225]

[0226] In one embodiment, Type-1 HARQ-ACK codebook determination may be associated with the following Table 14.

[0227] [Table 14]

[0228]

[0229]

[0230] In another embodiment, the type-1 HARQ-ACK codebook determination may be associated with the following Table 15.

[0231] [Table 15]

[0232]

[0233]

[0234] In one embodiment, regarding the Type-1 HARQ-ACK codebook for PUCCH, for serving cell c, active SLBWP, and active UL BWP, the UE may determine the M for candidate PSFCH reception. A,C The set of opportunities, UE can be in time slot n u The corresponding HARQ-ACK information is sent in the PUCCH in the . This determination can be based on, for example, the following Table 16.

[0235] [Table 16]

[0236]

[0237] In one embodiment, for the time slot timing value K1, the UE may determine the M for candidate PSFCH reception according to the pseudo code of Table 17 below: A,C A collection of opportunities.

[0238] [Table 17]

[0239]

[0240]

[0241] In addition, with respect to Table 16 and / or Table 17, the examples associated with the following Table 18 may be further applied and / or reviewed.

[0242] [Table 18]

[0243]

[0244] In one embodiment, the type-1 HARQ-ACK codebook in PUCCH may be associated with the following Table 19.

[0245] [Table 19]

[0246]

[0247] In one embodiment, Type-2 HARQ-ACK codebook determination may be associated with the following Table 20.

[0248] [Table 20]

[0249]

[0250]

[0251] Referring to Table 20, if the UE sends HARQ-ACK information in the PUCCH in time slot n, and for any PUCCH format, the UE can determine the PUCCH format for time slot n according to Tables 21 and 22 below. ACK The total number of HARQ-ACK information bits is O0 ～ACK ,O1 ～ACK wait.

[0252] [Table 21]

[0253]

[0254]

[0255] [Table 22]

[0256]

[0257] In an embodiment, with reference to Table 21 and / or Table 22, the embodiment of the following Table 23 may be applied and / or discussed together.

[0258] [Table 23]

[0259]

[0260]

[0261] In one embodiment, with respect to Table 23, for N C-SAI SL The value of the counter SAI with =2 can be as shown in the following Table 24.

[0262] [Table 24]

[0263]

[0264] In one embodiment, the type-2 HARQ-ACK codebook in PUCCH may be associated with the following Table 25.

[0265] [Table 25]

[0266]

[0267]

[0268] Regarding Table 25, the value of DAI in DCI format 0_1 ​​can be, for example, as shown in the following Table 26.

[0269] [Table 26]

[0270]

[0271] In one embodiment, the UE process for reporting HARQ-ACK on the uplink may be as shown in Table 27 below.

[0272] [Table 27]

[0273]

[0274]

[0275] The following Table 28 shows an example related to S-PSS and S-SSS.

[0276] [Table 28]

[0277]

[0278] Table 29 below shows an embodiment related to the synchronization process.

[0279] [Table 29]

[0280]

[0281] Table 30 below is an example related to S-SSB.

[0282] [Table 30]

[0283]

[0284] The following Table 31 shows an example of resources in an S-SS / PSBCH block used for S-PSS, S-SSS, PSBCH, and DM-RS.

[0285] [Table 31]

[0286]

[0287] The following Table 32 is an embodiment related to the mapping of S-PSS and / or S-SSS in the S-SS / PSBCH block.

[0288] [Table 32]

[0289]

[0290] Fig.14 An example of a process in which a base station, a first device, and a second device perform wireless communication based on an embodiment of the present disclosure is shown.

[0291] In step S1410, the first device according to the embodiment may receive radio resource control (RRC) configuration information related to sidelink configuration grant (CG) resources from a base station.

[0292] In step S1420, the first device according to the embodiment may send a PSCCH through a side link transmission resource determined based on the RRC configuration information.

[0293] In step S1430, the first device according to the embodiment may transmit a PSSCH related to the PSCCH through a side link transmission resource.

[0294] In one embodiment, the RRC configuration information may include a timing offset for determining a first side link CG time slot and a side link resource period of a side link CG time slot periodically allocated by the base station.

[0295] In an embodiment, the sidelink transmission resources may be determined in units of logical time slots based on a timing offset and a sidelink resource period.

[0296] Hereinafter, various embodiments and / or examples directly or indirectly related to at least one of steps S1410 to S1430 will be described.

[0297] Based on the embodiment, in mode 1 operation in which resources are allocated by the base station and transmission is scheduled in SL communication, the base station can determine resources related to PSCCH, PSSCH and / or PSFCH to be sent by the UE for SL communication and resources related to PUCCH for HARQ feedback to be sent by the UE to the base station, and the base station can allocate the determined resources to the UE. For example, the base station can notify the UE of the timing and location of the resources through the SL DCI.

[0298] For example, in Mode 1 operation, the method by which the base station allocates resources to the UE may be as follows.

[0299] - Dynamic Grant (DG): The base station can directly and dynamically allocate resources to the UE based on DG.

[0300] -Configuration Grant (CG) Type-1: The base station may allocate periodic transmission resources to the UE through higher layer signaling. For example, the higher layer signaling may be RRC signaling.

[0301] -Configuration Grant (CG) Type-2: The base station may allocate periodic transmission resources to the UE through higher layer signaling, and the base station may dynamically activate or deactivate the periodic transmission resources through DCI. For example, the higher layer signaling may be RRC signaling.

[0302] For ease of description, CG type-1 may be referred to as SL mode-1 CG type-1, and CG type-2 may be referred to as SL mode-1 CG type-2. For ease of description, SL-related resources allocated to a UE by a base station via SL mode-1 CG type-1 may be referred to as SL mode-1 CG type-1 transmission resources or SL mode-1 CG type-1 resources.

[0303] Based on various embodiments of the present disclosure, a method for determining SL transmission resources based on SL mode-1CG type-1 and a device supporting the method are proposed.

[0304] For example, the configuration information related to SL mode-1CG type-1 configured by the base station to the UE through RRC signaling may include the following content. For ease of description, the configuration information related to SL mode-1CG type-1 sent by the base station to the UE through RRC signaling may be referred to as RRC configuration or RRC configuration information.

[0305] -OFFSET: Timing offset of the first (or initial) CG resource

[0306] -PERIOD: The interval period between CG resources periodically allocated by the base station

[0307] For example, the UE may determine the SL mode-1 CG type-1 transmission resources as follows based on the time when the UE receiving the RRC configuration confirms the RRC configuration and the information included in the RRC configuration.

[0308] A) Offset time calculation method: The UE may calculate or determine the OFFSET time based on at least one of the following embodiments.

[0309] For example, within a SFN time period that is periodically repeated every 10240 ms, the UE may calculate or determine the time indicated by OFFSET from the DL reference SFN=0 in units of physical time slots (which is an absolute time) based on the DL parameter set.

[0310] For example, within a SFN time period that is periodically repeated every 10240 ms, the UE may calculate or determine the time indicated by OFFSET starting from the DL reference SFN=0 in units of physical time slots (which is an absolute time) based on the SL parameter set.

[0311] For example, within a SFN time period that is periodically repeated every 10240 ms, the UE may calculate or determine the time indicated by OFFSET starting from the DL reference SFN=0 in units of logical time slots (which are relative time) within the SL resource pool based on the SL parameter set.

[0312] For example, within a DFN time period that is periodically repeated every 10240 ms, the UE may calculate or determine the time indicated by OFFSET from the SL reference DFN=0 in units of physical time slots (which is an absolute time) based on the SL parameter set.

[0313] For example, within a DFN time period that is periodically repeated every 10240 ms, the UE may calculate or determine the time indicated by OFFSET from the SL reference DFN=0 in units of logical time slots (which are relative time) within the SL resource pool based on the SL parameter set.

[0314] B) If the OFFSET time calculated or determined by the UE is later than the time when the UE confirms the RRC configuration,

[0315] For example, the UE may use the resource in the SL resource pool that is located at the earliest time after the calculated or determined OFFSET time as the first SL CG type-1 transmission resource. For example, after the first SL CG type-1 resource, the UE may use the resource in the SL resource pool as a periodic SL CG type-1 resource, which exists in each period of the PERIOD interval separated from the first SL CG type-1 resource in units of logical time slots in terms of the SL resource pool.

[0316] C) If the OFFSET time calculated or determined by the UE is earlier than the time when the UE confirms the RRC configuration,

[0317] For example, the UE may configure periodic virtual SL CG type-1 resources separated by PERIOD intervals in units of physical time slots (which is an absolute time) based on the DL parameter set, based on the calculated or determined OFFSET time. In addition, the UE may determine, from the periodic virtual SL CG type-1 resources, a first virtual SL CG type-1 resource that exists at the earliest time after the time when the RRC configuration is confirmed. In addition, the UE may use a resource in the SL resource pool that exists at the earliest time after the first virtual SL CG type-1 resource as the first SL CG type-1 transmission resource.

[0318] For example, the UE may configure periodic virtual SL CG type-1 resources separated by PERIOD intervals in units of physical time slots (which is an absolute time) based on the SL parameter set, based on the calculated or determined OFFSET time. In addition, the UE may determine, from the periodic virtual SL CG type-1 resources, a second virtual SL CG type-1 resource that exists at the earliest time after the time when the RRC configuration is confirmed. In addition, the UE may use the resource in the SL resource pool that exists at the earliest time after the second virtual SL CG type-1 resource as the first SL CG type-1 transmission resource.

[0319] For example, the UE may configure periodic virtual SL CG type-1 resources separated by PERIOD intervals in units of logical time slots (which is a relative time) based on the SL parameter set and based on the calculated or determined OFFSET time. In addition, the UE may use the third virtual SL CG type-1 resource that exists at the earliest time after the time when the RRC configuration is confirmed from among the periodic virtual SL CG type-1 resources as the first SL CG type-1 transmission resource.

[0320] In the above case, for example, after the first SL CG type-1 resource, the UE may use the resources in the SL resource pool as periodic SL CG type-1 resources, which exist in each period of the PERIOD interval separated from the first SL CG type-1 resource in units of logical time slots in terms of the SL resource pool.

[0321] At the same time, the base station may not be aware of the time DFN=0. Therefore, based on an embodiment of the present disclosure, the UE may report information related to the time SFN=0 to the base station based on the DL timing, and report information related to the time DFN=0 to the base station based on the SL timing. In this case, the base station may calculate or obtain the time DFN=0 by using the time gap between the SFN and DFN reported from the UE. Alternatively, the UE may report the time gap between the SFN and DFN to the base station. For example, when the base station configures SL CG type-1 resources to the UE through RRC signaling, the base station may determine the time DFN=0 based on the time gap between the SFN and DFN reported from the UE. In addition, the base station may configure the UE's OFFSET value based on the time DFN=0.

[0322] For example, depending on the distance between the UE and the base station, the DL timing identified by the UE may differ between UEs in terms of absolute time (e.g., UTC). For example, the DL timing identified by a UE located far away from the base station may be later than the DL timing identified by a UE located close to the base station. In this case, when the base station configures SL CG type-1 resources for the UE through RRC configuration according to the above scheme, the absolute time of SFN=0 or DFN=0 may vary. In addition, therefore, the problem of mismatch of CG type-1 transmission resources between UEs may occur. In order to solve this problem, the SFN=0 or DFN=0 timing identified by the UE may be consistent with the distance between the base station and the UE in proportion.

[0323] For example, in the process of the UE determining the first SL CG type-1 resource, the UE may consider and apply a value obtained by dividing a timing advance (TA) value proportional to the distance between the base station and the UE by 2. For example, the UE may determine the first SL CG type-1 resource based on a value obtained by dividing a timing advance (TA) value proportional to the distance between the base station and the UE by 2.

[0324] For example, in the process A for determining the OFFSET time, the UE may determine the value obtained by subtracting TA / 2 from the calculated OFFSET value as the final OFFSET time. In addition, the UE may determine the first SLCG type-1 transmission resource based on the final OFFSET value. For example, the process (i.e., process B and process C) in which the UE determines the SL CG type-1 resource according to the RRC confirmation time compared with the OFFSET time can be applied in the same manner as the above method.

[0325] For example, in the process for determining SL CG type-1 resources, the UE may determine the value obtained by subtracting TA / 2 from the RRC confirmation time as the final RRC confirmation time. In this case, the process A for calculating the remaining OFFSET time and the processes B and C for determining the SL CG type-1 resources based on the RRC confirmation time compared with the OFFSET time can be applied in the same manner as the above method.

[0326] For example, in process C for determining the first SL CG type-1 resource, the UE may apply the TA / 2 value as follows. Hereinafter, process D will be described in detail.

[0327] D) If the OFFSET time calculated or determined by the UE is earlier than the time when the UE confirms the RRC configuration,

[0328] For example, the UE may configure periodic virtual SL CG type-1 resources separated by OFFSET intervals in units of physical time slots (which is an absolute time) based on the DL parameter set, based on the calculated or determined OFFSET time. In addition, the UE may determine the fourth virtual SL CG type-1 resource that exists earliest after confirming the RRC configuration from the periodic virtual SL CG type-1 resources. In addition, the UE may use a resource in the SL resource pool that exists at the earliest time after the time obtained by subtracting the TA / 2 value from the fourth virtual SL CG type-1 resource time as the first SL CG type-1 transmission resource.

[0329] For example, the UE may configure periodic virtual SL CG type-1 resources separated by PERIOD intervals in units of physical time slots (which is an absolute time) based on the SL parameter set, based on the calculated or determined OFFSET time. In addition, the UE may determine the fifth virtual SL CG type-1 resource that exists earliest after confirming the RRC configuration from the periodic virtual SL CG type-1 resources. In addition, the UE may use a resource in the SL resource pool that exists at the earliest time after the time obtained by subtracting the TA / 2 value from the fifth virtual SL CG type-1 resource time as the first SL CG type-1 transmission resource.

[0330] For example, the UE may determine the first SL CG type-1 resource based on Equation 5 below.

[0331] [Equation 5]

[0332] Toffset=(timeDomainOffset×numberOfSymbolsPerSlot+N0×periodicity)×T_″symbol″-T-″TA″ / 2

[0333] Herein, for example, timeDomainOffset may be an OFFSET value represented by the number of time slots. For example, the base station may send an RRC configuration including timeDomainOffset to the UE. For example, numberOfSymbolsPerSlot may be the number of symbols per time slot. For example, periodicity may be a periodicity value represented by the number of symbols. For example, the base station may send an RRC configuration including periodicity to the UE. For example, T″symbol″ may be a symbol duration, and T″TA″ may be a TA value. In this case, N0 may be the minimum integer value that prevents the Toffset value from being earlier than the time when the UE confirms the RRC configuration. In this case, if the periodicity is represented by the number of physical symbols, the UE may use the resources in the SL resource pool that exist at the earliest time after the Toffset value as the first SL CG type-1 transmission resource. Alternatively, if the periodicity is represented by the number of logical symbols included in the SL resource pool, the UE may use the resources in the SL resource pool corresponding to the Toffset value as the first SL CG type-1 transmission resource.

[0334] For example, in the case where a TDD multiplexed carrier is configured between the SL and Uu links, in order to perform DL reception or SL reception after the UE performs SL transmission, the UE needs to switch the RF chain. In this article, in order to ensure the time required for the UE to switch the RF chain, the UE can determine a timing that is a specific time earlier than the DL transmission timing of the serving cell as the SL transmission timing. For example, the UE can determine a time that is "TA+TA offset" earlier than the DL transmission timing of the serving cell as the SL transmission timing. For example, the UE can determine / obtain the SL transmission timing based on the following equation 6.

[0335] [Equation 6]

[0336] SL transmission timing = DL transmission timing of serving cell - (TA + TA offset)

[0337] In this case, when the base station configures / sends a TA offset to the UE, the UE may not expect another SL reception or DL ​​reception during the TA offset time after completing the SL transmission. For example, when the base station configures / sends a TA offset to the UE, the UE that has completed the SL transmission may not perform SL reception during the TA offset time. For example, when the base station configures / sends a TA offset to the UE, the UE that has completed the SL transmission may not perform DL reception during the TA offset time.

[0338] For example, in the case where a frequency division duplex (FDD) multiplexed carrier is configured between the SL and Uu links, and when the base station configures / sends a TA offset to the UE, the UE may perform the following operations to determine the SL transmission timing.

[0339] 1) When the base station configures / sends the TA offset to the UE, the UE may determine the SL transmission timing to be advanced by the "TA+TA offset" time from the DL transmission timing. For example, the UE may determine / obtain the SL transmission timing based on Equation 6.

[0340] 2) Even when the base station configures / sends a TA offset to the UE, since the UE supports two or more RF chains for configuring a carrier for FDD multiplexing, the UE may not advance the SL transmission timing by applying a separate TA offset to the SL transmission timing.

[0341] 3) When the base station configures / sends a TA offset to the UE, the UE may not apply the TA offset set by the base station as is. Specifically, for example, the UE may determine the SL transmission timing by applying a predefined or preconfigured (independent) TA offset value. For example, the UE may determine the SL transmission timing by advancing the SL transmission time by a predefined or preconfigured specific ratio among the TA offset values ​​configured by the base station.

[0342] For example, in the case where SL communication (e.g., communication between UEs) and Uu link communication (e.g., communication between UE and base station) share a carrier, both the PDCCH monitoring timing for the Uu link and the PDCCH monitoring timing for the SL may exist in the same timeslot on the same carrier. In this case, for example, the search space of the SL may be the same as the search space of the Uu link. Or, for example, the search space of the SL may partially overlap with the search space of the Uu link. Or, for example, the search space for the Uu link may be the same as the search space for the SL. Or, for example, the search space of the Uu link may partially overlap with the search space of the SL.

[0343] In the above situation, the UE may not expect to simultaneously receive a PDCCH including a DL grant and a PDCCH including a SL grant from the base station in the same PDCCH monitoring opportunity on the same scheduling cell. For example, the UE may determine that the base station does not simultaneously send a PDCCH including a DL grant and a PDCCH including a SL grant in the same PDCCH monitoring opportunity on the same scheduling cell. In this case, for example, the DL grant may be a DG. For example, the DL grant may be a CG type-2. For example, the DL grant may include a DG and a CG type-2. For example, the SL grant may be a DG. For example, the SL grant may be a CG type-2. For example, the SL grant may include a DG and a CG type-2.

[0344] For example, in the above case, the search space for the Uu DCI format and the search space for the SL DCI format may overlap. In this case, if at least one of the corresponding Uu DCI formats is associated with the same CORESET of the SL DCI format, the base station may align the size of the corresponding Uu DCI format with the size of the SL DCI format. For example, the base station may align the size of the Uu DCI format with the size of the SL DCI format by performing zero padding on the DCI having a smaller size in the Uu DCI and the SL DCI. For example, the base station may align the size of the Uu DCI format with the size of the SL DCI format by performing truncation on the DCI having a larger size in the Uu DCI or the SL DCI.

[0345] For example, the CORESETs associated with the Uu DCI format and the SL DCI format may be different from each other. Even in this case, if the search spaces associated with the Uu DCI format and the SL DCI format overlap with each other, the base station may align the size of the corresponding Uu DCI format and the size of the SL DCI format. For example, the base station may align the size of the Uu DCI format and the size of the SL DCI format by performing zero padding on the DCI having a smaller size in the Uu DCI and the SL DCI. For example, the base station may align the size of the Uu DCI format and the size of the SL DCI format by performing truncation on the DCI having a larger size in the Uu DCI or the SL DCI.

[0346] For example, the UE may not expect that in the search space that satisfies the above conditions, the size of all Uu DCI formats is smaller than the size of the SL DCI format. For example, the UE may expect or determine that in the search space that satisfies the above conditions, the size of at least one Uu DCI format is greater than or equal to the size of the SL DCI format.

[0347] In the case where SL communication and Uu link communication share a carrier, if both the PDCCH monitoring timing for the Uu link and the PDCCH monitoring timing for the SL exist in the same time slot on the same carrier, the search space used for SL can be the same as or partially overlap with the search space used for the Uu link, or the search space used for the Uu link can be the same as or partially overlap with the search space used for SL.

[0348] In this case, the UE may not expect to simultaneously receive a PDCCH through which a DL grant is sent and a PDCCH through which a SL grant is sent on the same PDCCH monitoring occasion in the same scheduling cell. In this case, the DL grant may be a dynamic grant or a configured grant type-2 or both, and the SL grant may be a dynamic grant or a configured grant type-2 or both.

[0349] Under the above conditions, if the search space for the Uu DCI format and the search space for the SL DCI format overlap, and if at least one of the corresponding Uu DCI formats is associated with the same CORESET of the SL DCI format, size alignment can be performed between the corresponding Uu DCI format and the SL DCI format.

[0350] Alternatively, even if the CORESETs associated with the Uu DCI format and the SL DCI format are different, if the search spaces associated with the Uu DCI format and the SL DCI format overlap with each other, size alignment between the corresponding Uu DCI format and the SL DCI format is performed.

[0351] Alternatively, the UE may not expect that the sizes of all Uu DCI formats in the search space that meet the above conditions are smaller than the size of the SL DCI format. That is, it may be expected that at least one Uu DCI format size is greater than or equal to the SL DCI format size.

[0352] If the base station allocates CG resources for SL communication, the base station can set the HARQ process ID and NDI to indicate which TB the CG resources are used for transmission. In this case, the resources used for the UE to perform initial transmission and retransmission of the same TB through the CG resources can be limited to the initial transmission resources and retransmission resources with the same HARQ process ID and NDI values. For example, if the UE performs initial transmission of a TB by using specific resources in the CG resources, the UE can perform retransmission of the TB by using CG resources with the same HARQ process ID and NDI as the specific resources. The UE can use CG resources belonging to one period for initial transmission and retransmission of the same TB according to a time period pre-configured / defined or configured by a higher layer.

[0353] For example, the time period may be a situation and / or timing including CG resources for initial transmission and retransmission, or a period including situations and / or timings. Alternatively, the time period may be the same as the period for the base station to allocate PUCCH resources.

[0354] In this case, the base station can set a different HARQ process ID for each period, or can switch the NDI value for different periods while having the same HARQ process ID. In terms of UE operation, when the SL transmission resource is indicated by SCI, the HARQ process ID can be set to a different value for each time period, or an operation of switching the NDI value while having the same HARQ process ID can be performed.

[0355] Based on this operation, if the UE fails to transmit a specific TB within the time period, the UE may send a HARQ NACK to the base station via the PUCCH, and additional retransmission resources may be allocated from the base station to the UE via the DG. In this case, the UE may perform additional retransmissions for successful TB transmissions only through resources allocated via the DG.

[0356] Fig.15 is a flowchart illustrating the operation of the first device according to an embodiment of the present disclosure.

[0357] The various embodiments of the present disclosure may be combined to perform Fig.15 In one example, based on Figures 17 to 22 to perform at least one of the devices shown in Fig.15 In one example, Fig.15 The first device may correspond to the later described Fig.18 The first wireless device 100. In another example, Fig.15 The first device may correspond to the later described Fig.18 The second wireless device 200.

[0358] In step S1510, the first device according to the embodiment may receive radio resource control (RRC) configuration information related to sidelink configuration grant (CG) resources from a base station.

[0359] In step S1520, the first device according to the embodiment may send a physical sidelink control channel (PSCCH) to the second device through the sidelink transmission resources determined based on the RRC configuration information.

[0360] In step S1530, the first device according to the embodiment may transmit a physical sidelink shared channel (PSSCH) related to the PSCCH to the second device through the sidelink transmission resource.

[0361] In one embodiment, the RRC configuration information may include a timing offset for determining a first side link CG time slot and a side link resource period of a side link CG time slot periodically allocated by the base station.

[0362] In one embodiment, the timing offset may be the same as above. Fig.14 The OFFSET described in . In addition, the side link resource period can be the same as that described in Fig.14 The PERIOD described in is the same, similar or corresponding.

[0363] In an embodiment, the sidelink transmission resources may be determined in units of logical time slots based on a timing offset and a sidelink resource period.

[0364] In one embodiment, a first side link CG timeslot may be determined based on a first time in which a timing offset in units of logical timeslots according to a side link parameter set is added to a time when a system frame number (SFN) is 0.

[0365] In one embodiment, the RRC configuration information sent from the base station can be decoded (or confirmed) by the first device at the second time. Based on the first time being later than the second time, the first side link CG time slot that initially occurs can be determined as the first logical time slot among the logical side link CG time slots after the first time or at the first time.

[0366] In one embodiment, the RRC configuration information sent from the base station can be decoded by the first device at the third time. Based on the first time being earlier than the third time, the first side link CG time slot that initially occurs can be determined as the first logical time slot after the third time or at the third time among the logical side link CG time slots after the fourth time or at the fourth time when the side link resource cycle in units of logical time slots according to the side link parameter set is added to the first time.

[0367] In one embodiment, the RRC configuration information may be associated with a sidelink CG type-1 resource. The sidelink CG type-1 resource may be determined without regard to downlink control information (DCI) received from a base station.

[0368] In one embodiment, the sidelink transmission resource may be determined by additionally considering a timing advance (TA). The TA may be information sent from the base station to the first device for adjusting the transmission timing of the first device.

[0369] In one embodiment, the first side link CG time slot that initially occurs can be determined based on a fifth time, where the fifth time is the time obtained by adding the timing offset in logical time slots according to the side link parameter set to the time when the SFN is 0 and subtracting (TA / 2).

[0370] In one embodiment, the RRC configuration information sent from the base station can be decoded by the first device at the sixth time. Based on the fifth time being later than the sixth time, the first side link CG time slot that initially occurs can be determined as the first logical time slot among the logical side link CG time slots after the fifth time or at the fifth time.

[0371] In one embodiment, the RRC configuration information sent from the base station can be decoded by the first device at the seventh time. Based on the fifth time being earlier than the seventh time, the first side link CG time slot that initially occurs can be determined as the first logical time slot after the seventh time or at the seventh time among the logical side link CG time slots after the eighth time or at the eighth time when the side link resource cycle in units of logical time slots according to the side link parameter set is added to the fifth time. In one embodiment, the side link transmission resource can be determined by additionally considering the timing advance (TA). TA can be information sent from the base station to the first device for adjusting the transmission timing of the first device. The RRC configuration information sent from the base station can be decoded by the first device at the ninth time. Based on the first time being earlier than the ninth time, the first side link CG time slot that initially occurs can be determined as the first logical time slot among the logical side link CG time slots after the eleventh time obtained by subtracting (TA / 2) from the tenth time. The tenth time may be a time corresponding to a first logical time slot among the logical side link CG time slots after or at the twelfth time when a side link resource period in units of logical time slots according to a side link parameter set is added to the first time, after or at the twelfth time.

[0372] In one embodiment, the side link transmission resource may be determined by additionally considering a timing advance (TA), and the TA may be information sent from the base station to the first device for adjusting the transmission timing of the first device. The RRC configuration information sent from the base station may be decoded by the first device at the thirteenth time, and the RRC configuration information may be determined by the first device to be decoded at the fourteenth time obtained by subtracting (TA / 2) from the thirteenth time. Based on the first time being later than the fourteenth time, the first side link CG slot that initially occurs may be determined to be the first logical slot among the logical side link CG slots after or at the first time.

[0373] In one embodiment, the side link transmission resource can be determined by additionally considering the timing advance (TA), and TA is information sent from the base station to the first device for adjusting the transmission timing of the first device. The RRC configuration information sent from the base station can be decoded by the first device at the fifteenth time, and the RRC configuration information can be determined by the first device to be decoded at the sixteenth time obtained by subtracting (TA / 2) from the fifteenth time. Based on the first time being earlier than the sixteenth time, the first side link CG time slot that initially appears can be determined as the first logical time slot after the sixteenth time or at the sixteenth time among the logical side link CG time slots after the seventeenth time or at the seventeenth time when the side link resource period in units of logical time slots according to the side link parameter set is added to the first time.

[0374] Based on an embodiment of the present disclosure, a first device configured to perform wireless communication may be provided. The first device may include: at least one memory storing instructions; at least one transceiver; and at least one processor, the at least one processor being connected to the at least one memory and the at least one transceiver, wherein the at least one processor executes instructions to: control at least one transceiver to receive radio resource control (RRC) configuration information related to sidelink configuration grant (CG) resources from a base station; control at least one transceiver to send a physical sidelink control channel (PSCCH) to a second device through a sidelink transmission resource determined based on the RRC configuration information; and control at least one transceiver to send a physical sidelink shared channel (PSSCH) related to the PSCCH to a second device through the sidelink transmission resource, wherein the RRC configuration information includes a timing offset for determining a first sidelink CG slot and a sidelink resource period of a sidelink CG slot periodically allocated by the base station, and wherein the sidelink transmission resource is determined in units of logical slots based on the timing offset and the sidelink resource period.

[0375] Based on an embodiment of the present disclosure, a device (or chip (group)) configured to control a first user equipment (UE) may be provided. The device may include: at least one processor; and at least one memory, the at least one memory being connected to the at least one processor and storing instructions, wherein the at least one processor executes the instructions to: receive radio resource control (RRC) configuration information related to a sidelink configuration grant (CG) resource from a base station; send a physical sidelink control channel (PSCCH) to a second device through a sidelink transmission resource determined based on the RRC configuration information; and send a physical sidelink shared channel (PSSCH) related to the PSCCH to the second device through the sidelink transmission resource, wherein the RRC configuration information includes a timing offset for determining a first sidelink CG time slot and a sidelink resource period of a sidelink CG time slot periodically allocated by the base station, and wherein the sidelink transmission resource is determined in units of logical time slots based on the timing offset and the sidelink resource period.

[0376] In one example, the first UE of the embodiment may refer to the first device described throughout the present disclosure. In one example, at least one processor, at least one memory, etc. in the device for controlling the first UE may be implemented as separate sub-chips, respectively, and alternatively, at least two or more components may be implemented by one sub-chip.

[0377] Based on an embodiment of the present disclosure, a non-transitory computer-readable storage medium storing instructions (or commands) may be provided. The non-transitory computer-readable storage medium, when the instructions are executed, causes a first device to: receive radio resource control (RRC) configuration information related to a sidelink configuration grant (CG) resource from a base station; send a physical sidelink control channel (PSCCH) to a second device through a sidelink transmission resource determined based on the RRC configuration information; and send a physical sidelink shared channel (PSSCH) related to the PSCCH to the second device through the sidelink transmission resource, wherein the RRC configuration information includes a timing offset for determining a first sidelink CG time slot and a sidelink resource period of a sidelink CG time slot periodically allocated by the base station, and wherein the sidelink transmission resource is determined in units of logical time slots based on the timing offset and the sidelink resource period.

[0378] Fig.16 is a flowchart illustrating the operation of the second device according to an embodiment of the present disclosure.

[0379] The various embodiments of the present disclosure may be combined to perform Fig.16 In one example, based on Figures 17 to 22 to perform at least one of the devices shown in Fig.16 In one example, Fig.16 The second device may correspond to the one described later. Fig.18 The second wireless device 200. In another example, Fig.16 The second device may correspond to the one described later. Fig.18 A first wireless device 100 is provided.

[0380] In step S1610, the second device according to the embodiment may receive the PSCCH from the first device through the side link transmission resources determined based on the RRC configuration information related to the side link CG resources.

[0381] In step S1620, the second device according to the embodiment may receive a PSSCH related to the PSCCH from the first device through the side link transmission resource.

[0382] In an embodiment, the RRC configuration information may be sent from the base station and received by the first device.

[0383] In one embodiment, the RRC configuration information may include a timing offset for determining a first side link CG time slot and a side link resource period of a side link CG time slot periodically allocated by the base station.

[0384] In one embodiment, the sidelink transmission resources may be determined in units of logical time slots based on the timing offset and the sidelink resource period.

[0385] In one embodiment, a first side link CG time slot may be determined based on a first time when a timing offset in units of logical time slots according to a side link parameter set is added to a time when a system frame number (SFN) is 0.

[0386] In one embodiment, the RRC configuration information sent from the base station can be decoded by the first device at the second time.Based on the first time being later than the second time, the first side link CG time slot that initially occurs can be determined as the first logical time slot among the logical side link CG time slots after the first time or at the first time.

[0387] In one embodiment, the RRC configuration information sent from the base station can be decoded by the first device at the third time. Based on the first time being earlier than the third time, the first side link CG time slot that initially occurs can be determined as the first logical time slot after the third time or at the third time among the logical side link CG time slots after the fourth time or at the fourth time when the side link resource cycle in units of logical time slots according to the side link parameter set is added to the first time.

[0388] In one embodiment, the RRC configuration information may be associated with a sidelink CG type-1 resource. The sidelink CG type-1 resource may be determined without regard to downlink control information (DCI) received from a base station.

[0389] In one embodiment, the sidelink transmission resource may be determined by additionally considering a timing advance (TA). The TA may be information sent from the base station to the first device for adjusting the transmission timing of the first device.

[0390] In one embodiment, the first side link CG time slot that initially occurs can be determined based on a fifth time, where the fifth time is the time obtained by adding the timing offset in logical time slots according to the side link parameter set to the time when the SFN is 0 and subtracting (TA / 2).

[0391] In one embodiment, the RRC configuration information sent from the base station can be decoded by the first device at the sixth time. Based on the fifth time being later than the sixth time, the first side link CG time slot that initially occurs can be determined as the first logical time slot among the logical side link CG time slots after the fifth time or at the fifth time.

[0392] In one embodiment, the RRC configuration information sent from the base station can be decoded by the first device at the seventh time. Based on the fifth time being earlier than the seventh time, the first side link CG time slot that initially occurs can be determined as the first logical time slot after the seventh time or at the seventh time among the logical side link CG time slots after the eighth time or at the eighth time when the side link resource cycle in units of logical time slots according to the side link parameter set is added to the fifth time.

[0393] In one embodiment, the side link transmission resource can be determined by additionally considering the timing advance (TA). TA can be information sent from the base station to the first device for adjusting the transmission timing of the first device. The RRC configuration information sent from the base station can be decoded by the first device at the ninth time. Based on the first time being earlier than the ninth time, the first side link CG slot that initially appears can be determined as the first logical slot among the logical side link CG slots after the eleventh time obtained by subtracting (TA / 2) from the tenth time. The tenth time can be a time corresponding to the first logical slot after the ninth time or at the ninth time among the logical side link CG slots after the twelfth time or at the twelfth time when the side link resource period in units of logical slots according to the side link parameter set is added to the first time.

[0394] In one embodiment, the side link transmission resource may be determined by additionally considering a timing advance (TA), and the TA may be information sent from the base station to the first device for adjusting the transmission timing of the first device. The RRC configuration information sent from the base station may be decoded by the first device at the thirteenth time, and the RRC configuration information may be determined by the first device to be decoded at the fourteenth time obtained by subtracting (TA / 2) from the thirteenth time. Based on the first time being later than the fourteenth time, the first side link CG slot that initially occurs may be determined to be the first logical slot among the logical side link CG slots after the first time or at the first time.

[0395] In one embodiment, the side link transmission resource can be determined by additionally considering the timing advance (TA), and the TA can be information sent from the base station to the first device for adjusting the transmission timing of the first device. The RRC configuration information sent from the base station can be decoded by the first device at the fifteenth time, and the RRC configuration information can be determined by the first device to be decoded at the sixteenth time obtained by subtracting (TA / 2) from the fifteenth time. Based on the first time being earlier than the sixteenth time, the first side link CG time slot that initially appears can be determined as the first logical time slot after the sixteenth time or at the sixteenth time among the logical side link CG time slots after the seventeenth time or at the seventeenth time when the side link resource period in units of logical time slots according to the side link parameter set is added to the first time.

[0396] Based on an embodiment of the present disclosure, a second device configured to perform wireless communication may be provided. The second device may include: at least one memory storing instructions; at least one transceiver; and at least one processor, the at least one processor being connected to the at least one memory and the at least one transceiver, wherein the at least one processor executes instructions to: control at least one transceiver to receive PSCCH from the first device through a sidelink transmission resource determined based on RRC configuration information related to a sidelink CG resource; and control at least one transceiver to receive PSSCH related to PSCCH from the first device through the sidelink transmission resource, wherein RRC configuration information is sent from a base station and received by the first device, wherein the RRC configuration information includes a timing offset for determining a first sidelink CG time slot and a sidelink resource period of a sidelink CG time slot periodically allocated by the base station, and wherein the sidelink transmission resource is determined in units of logical time slots based on the timing offset and the sidelink resource period.

[0397] Various embodiments of the present disclosure may be implemented independently. Alternatively, various embodiments of the present disclosure may be implemented by combination or merging. For example, although various embodiments of the present disclosure have been described based on the 3GPP LTE system for ease of explanation, various embodiments of the present disclosure may also be extended to another system other than the 3GPP LTE system. For example, in the absence of direct communication limited to UEs, various embodiments of the present disclosure may also be used for uplink or downlink situations. In this case, base stations, relay nodes, etc. may use methods proposed according to various embodiments of the present disclosure. For example, it may be defined that information about whether the method according to various embodiments of the present disclosure is applied is reported to the UE by the base station or reported to the receiving UE by the sending UE through predefined signaling (e.g., physical layer signaling or higher layer signaling). For example, it may be defined that information about rules according to various embodiments of the present disclosure is reported to the UE by the base station or reported to the receiving UE by the sending UE through predefined signaling (e.g., physical layer signaling or higher layer signaling). For example, some embodiments among the various embodiments of the present disclosure may be limitedly applied to resource allocation mode 1. For example, some embodiments of the various embodiments of the present disclosure may be limitedly applied to resource allocation mode 2 only.

[0398] Hereinafter, devices to which various embodiments of the present disclosure can be applied will be described.

[0399] 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).

[0400] 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.

[0401] Fig.17 A communication system (1) according to an embodiment of the present disclosure is shown.

[0402] Reference Fig.17 , 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 appliances, 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.

[0403] Herein, the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may include, in addition to LTE, NR and 6G, a narrowband Internet of Things for low-power communication. 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 CatNB2, 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 IEEE802.15.4, etc., and may be referred to as various names.

[0404] The wireless devices 100a to 100f may be connected to the network 300 via the BS 200. 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., side link communication) with each other without going 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.

[0405] Wireless communication / connection 150a, 150b or 150c can be established between wireless devices 100a to 100f / BS 200 or BS200 / BS 200. 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.

[0406] Fig.18 A wireless device according to an embodiment of the present disclosure is shown.

[0407] Reference Fig.18 , 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.17 {wireless device (100x) and BS (200)} and / or {wireless device (100x) and wireless device (100x)}.

[0408] 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.

[0409] 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 send 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 fourth information / signals 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.

[0410] 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.

[0411] 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.

[0412] 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.

[0413] 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.

[0414] Fig.19 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown.

[0415] Reference Fig.19 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.19 Operation / function, not limited to Fig.18 The processor (102, 202) and / or transceiver (106, 206) of Fig.18The processor (102, 202) and / or the transceiver (106, 206) are implemented Fig.19 For example, you can Fig.18 The processor (102, 202) implements blocks 1010 to 1060. Alternatively, Fig.18 The processor (102, 202) implements blocks 1010 to 1050 and can be implemented by Fig.18 The transceiver (106, 206) is used to implement box 1060.

[0416] Can be through Fig.19 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).

[0417] 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 symbols. Alternatively, the precoder 1040 may perform precoding without performing transform precoding.

[0418] 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.

[0419] Can Fig.19 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.18 100, 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 downconverter, 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.

[0420] Fig. 20 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.17 ).

[0421] Reference Fig. 20 , the wireless device (100, 200) may correspond to Fig.18 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.18 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.18The control unit (120) is electrically connected to the communication unit (110), the memory (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 memory unit (130). The control unit (120) can send the information stored in the memory 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 memory unit (130).

[0422] The additional component (140) may be configured in various ways depending on the type of wireless device. For example, the additional component (140) may include at least one of a power supply 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.17 100a), vehicles ( Fig.17 100b-1 and 100b-2), XR devices ( Fig.17 100c), handheld devices ( Fig.17 100d), household appliances ( Fig.17 100e), IoT devices ( Fig.17 100f), digital broadcasting terminals, hologram equipment, public safety equipment, MTC equipment, medical equipment, fintech equipment (or financial equipment), security equipment, climate / environmental equipment, AI servers / equipment ( Fig.17 400), BS( Fig.17 200), network nodes, etc. Depending on the use case / service, the wireless device can be used in a mobile or fixed place.

[0423] exist Fig. 20In the wireless device (100, 200), various elements, components, units / parts and / or modules in the wireless device (100, 200) can all be connected to each other through a wired interface, or at least part of them can be wirelessly connected 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 wirelessly connected 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 memory ( 130 ) may be constructed by random access memory (RAM), dynamic RAM (DRAM), read only memory (ROM), flash memory, volatile memory, nonvolatile memory, and / or combinations thereof.

[0424] Hereinafter, the implementation will be described in detail with reference to the accompanying drawings. Fig. 20 .

[0425] Fig.21 A handheld device according to an embodiment of the present disclosure is shown. The handheld device may include a smart phone, a smart board, 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).

[0426] Reference Fig.21 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. 20 Frame 110 to 130 / 140.

[0427] 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.

[0428] 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.

[0429] Fig. 22 A vehicle or autonomous vehicle according to an embodiment of the present disclosure is shown. The vehicle or autonomous vehicle can be implemented by a mobile robot, a car, a train, a manned / unmanned aerial vehicle (AV), a ship, etc.

[0430] Reference Fig. 22 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. 20 Frame 110 / 130 / 140.

[0431] 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.

[0432] 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.

[0433] The scope of the present disclosure may be indicated by the appended claims, and it should be understood that all variations or modifications derived from the meaning and scope of the claims and their equivalents may be included in the scope of the present disclosure.

[0434] The claims in this specification can be combined in various ways. For example, the technical features in the method claims of this specification can be combined to be implemented or performed in a device, and the technical features in the device claims can 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 can 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 can 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: Receiving radio resource control RRC configuration information related to a sidelink configuration grant CG resource from a base station; In one cycle, a sidelink synchronization signal / physical sidelink broadcast channel block, a sidelink-SSB transmission to a second device is performed, The power of the sidelink-SSB transmission is controlled based on the open loop power control OLPC based on the path loss of the downlink DL specific to the sidelink-SSB; Sending a physical sidelink control channel PSCCH to the second device by using the sidelink transmission resources determined based on the RRC configuration information; and Sending a physical sidelink shared channel PSSCH related to the PSCCH to the second device through the sidelink transmission resource, The RRC configuration information includes a timing offset for determining a first side link CG time slot and a side link resource period of a side link CG time slot periodically allocated by the base station, and wherein the side link transmission resource is determined based on the timing offset and the side link resource period, The side link resource period is in units of the number of logical time slots in the resource pool. The timing offset is in units of the number of logical time slots in the resource pool. wherein the first time of the first side link CG time slot is determined based on the timing offset indicating the number of the logical time slots after a reference system frame number SFN, The reference SFN is zero SFN, and wherein the timing of the transmission via the sidelink transmission resource is determined by additionally taking into account the timing advance TA, and The TA is information transmitted from the base station to the first device, and is used to adjust the timing of transmission through the side link transmission resource.

2. The method according to claim 1, wherein: decoding, by the first device at a second time, the RRC configuration information sent from the base station, and Wherein, based on the fact that the first time is later than the second time, the first side link CG time slot that initially occurs is determined to be the first logical time slot among the logical side link CG time slots after the first time or at the first time.

3. The method according to claim 1, wherein: decoding, by the first device at a third time, the RRC configuration information sent from the base station, and Wherein, based on the fact that the first time is earlier than the third time, the first side link CG time slot that initially occurs is determined to be the first logical time slot after the third time or at the third time among the logical side link CG time slots after the fourth time or at the fourth time when the side link resource period is added to the first time.

4. The method according to claim 1, wherein: The RRC configuration information is related to the sidelink CG type-1 resources, and In which, the side link CG type-1 resources are determined without considering the downlink control information DCI received from the base station.

5. The method according to claim 1, wherein: The first side link CG time slot that initially occurs is determined based on a fifth time, where the fifth time is a time obtained by adding the timing offset to the time when SFN is 0 and subtracting (TA / 2) from the time obtained.

6. The method according to claim 5, wherein: decoding, by the first device at a sixth time, the RRC configuration information sent from the base station, and Wherein, based on the fact that the fifth time is later than the sixth time, the first side link CG time slot that initially appears is determined to be the first logical time slot among the logical side link CG time slots after the fifth time or at the fifth time.

7. The method according to claim 5, wherein: decoding, by the first device at a seventh time, the RRC configuration information sent from the base station, and Wherein, based on the fact that the fifth time is earlier than the seventh time, the first side link CG time slot that initially occurs is determined to be the first logical time slot after the seventh time or at the seventh time among the logical side link CG time slots after the eighth time or at the eighth time when the side link resource period is added to the fifth time.

8. The method according to claim 1, wherein: decoding, by the first device at a ninth time, the RRC configuration information sent from the base station, wherein, based on the first time being earlier than the ninth time, the first side link CG time slot that initially occurs is determined to be the first logical time slot among the logical side link CG time slots after the eleventh time obtained by subtracting (TA / 2) from the tenth time, and Among them, the tenth time is the time corresponding to the first logical time slot after the ninth time or at the ninth time among the logical side link CG time slots after the twelfth time or at the twelfth time when the side link resource period is added to the first time.

9. The method according to claim 1, wherein: decoding, by the first device at a thirteenth time, the RRC configuration information sent from the base station, wherein the RRC configuration information is determined by the first device to be decoded at a fourteenth time obtained by subtracting (TA / 2) from a thirteenth time, and Wherein, based on the fact that the first time is later than the fourteenth time, the first side link CG time slot that initially occurs is determined to be the first logical time slot among the logical side link CG time slots after the first time or at the first time.

10. The method according to claim 1, wherein: decoding, by the first device at the fifteenth time, the RRC configuration information sent from the base station, wherein the RRC configuration information is determined by the first device to be decoded at a sixteenth time obtained by subtracting (TA / 2) from the fifteenth time, Wherein, based on the first time being earlier than the sixteenth time, the first side link CG time slot that initially occurs is determined to be the first logical time slot after the sixteenth time or at the sixteenth time among the logical side link CG time slots after the seventeenth time or at the seventeenth time when the side link resource period is added to the first time.

11. A first device configured to perform wireless communication, the first device comprising: at least one memory storing instructions; at least one transceiver; as well as at least one processor connected to the at least one memory and the at least one transceiver, wherein the at least one processor executes the instructions to: Controlling the at least one transceiver to receive radio resource control RRC configuration information related to a sidelink configuration grant CG resource from a base station; controlling the at least one transceiver to perform a sidelink synchronization signal / physical sidelink broadcast channel block, sidelink-SSB transmission to a second device within a period, The power of the sidelink-SSB transmission is controlled based on the open loop power control OLPC based on the path loss of the downlink DL specific to the sidelink-SSB; controlling the at least one transceiver to transmit a physical sidelink control channel (PSCCH) to the second device through a sidelink transmission resource determined based on the RRC configuration information; and controlling the at least one transceiver to transmit a physical sidelink shared channel PSSCH related to the PSCCH to the second device through the sidelink transmission resource, The RRC configuration information includes a timing offset for determining a first side link CG time slot and a side link resource period of a side link CG time slot periodically allocated by the base station, and wherein the side link transmission resource is determined based on the timing offset and the side link resource period, The side link resource period is in units of the number of logical time slots in the resource pool. The timing offset is in units of the number of logical time slots in the resource pool. wherein the first time of the first side link CG time slot is determined by the timing offset indicating the number of the logical time slots after the reference system frame number SFN, The reference SFN is zero SFN, and wherein the timing of the transmission via the sidelink transmission resource is determined by additionally taking into account the timing advance TA, and The TA is information transmitted from the base station to the first device, and is used to adjust the timing of transmission through the side link transmission resource.

12. An apparatus configured to control a first user equipment UE, the apparatus comprising: at least one processor; as well as at least one memory coupled to the at least one processor and storing instructions, wherein the at least one processor executes the instructions to: Receiving radio resource control RRC configuration information related to a sidelink configuration grant CG resource from a base station; In one cycle, a sidelink synchronization signal / physical sidelink broadcast channel block, a sidelink-SSB transmission to a second device is performed, The power of the sidelink-SSB transmission is controlled based on the open loop power control OLPC based on the path loss of the downlink DL specific to the sidelink-SSB; Sending a physical sidelink control channel PSCCH to the second UE by using the sidelink transmission resources determined based on the RRC configuration information; and Sending a physical sidelink shared channel PSSCH related to the PSCCH to the second UE through the sidelink transmission resource, The RRC configuration information includes a timing offset for determining a first side link CG time slot and a side link resource period of a side link CG time slot periodically allocated by the base station, and wherein the side link transmission resource is determined based on the timing offset and the side link resource period, The side link resource period is in units of the number of logical time slots in the resource pool, and The timing offset is in units of the number of logical time slots in the resource pool. wherein the first time of the first side link CG time slot is determined based on the timing offset indicating the number of the logical time slots after a reference system frame number SFN, The reference SFN is zero SFN, and wherein the timing of the transmission via the sidelink transmission resource is determined by additionally taking into account the timing advance TA, and The TA is information transmitted from the base station to the first UE, and is used to adjust the timing of transmission through the side link transmission resources.

13. A non-transitory computer-readable storage medium storing instructions that, when executed, cause a first device to: Receiving radio resource control RRC configuration information related to a sidelink configuration grant CG resource from a base station; In one cycle, a sidelink synchronization signal / physical sidelink broadcast channel block, a sidelink-SSB transmission to a second device is performed, in, The power of the sidelink-SSB transmission is controlled based on a sidelink-SSB specific downlink DL path loss based open loop power control OLPC; Sending a physical sidelink control channel PSCCH to the second device by using the sidelink transmission resources determined based on the RRC configuration information; as well as Sending a physical sidelink shared channel PSSCH related to the PSCCH to the second device through the sidelink transmission resource, The RRC configuration information includes a timing offset for determining a first side link CG time slot and a side link resource period of a side link CG time slot periodically allocated by the base station, and wherein the side link transmission resource is determined based on the timing offset and the side link resource period, The side link resource period is in units of the number of logical time slots in the resource pool. The timing offset is in units of the number of logical time slots in the resource pool. wherein the first time of the first side link CG time slot is determined by the timing offset indicating the number of the logical time slots after the reference system frame number SFN, The reference SFN is zero SFN, and wherein the timing of the transmission via the sidelink transmission resource is determined by additionally taking into account the timing advance TA, The TA is information transmitted from the base station to the first device, and is used to adjust the timing of transmission through the side link transmission resource.

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