Method and apparatus for retransmission of a secondary link in NR V2X

Abstract

A method for performing wireless communication by a first device is provided. The method may include the following steps: receiving information related to configured grant (CG) resources, the information including time period information about the CG resources; sending a first transmission block via resources in a first time period based on the time period information about the CG resources; and sending a second transmission block via resources in a second time period based on the time period information about the CG resources. For example, resources within the second time period cannot be selected as resources for retransmitting the first transmission block.

Description

Technical Field

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

[0002] Side Link (SL) communication is a communication scheme in which a direct link is established between User Equipments (UEs) and the UEs exchange voice and data directly 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 infrastructure-equipped objects. V2X can be categorized into four types: V2V (Vehicle-to-Vehicle), V2I (Vehicle-to-Infrastructure), V2N (Vehicle-to-Network), and V2P (Vehicle-to-Pedestrian). V2X communication can be provided via the PC5 interface and / or the Uu interface.

[0004] In addition, as more and more communication devices require larger communication capacity, there is a need for enhanced mobile broadband communication compared to traditional radio access technology (RAT). Therefore, the design of communication systems that take into account UEs or services that are sensitive to reliability and latency has also been discussed, and the next generation radio access technology that takes into account enhanced mobile broadband communication, large-scale MTC, and ultra-reliable low-latency communication (URLLC) can be referred to as new RAT (radio access technology) or NR (new radio). In this article, NR can also support vehicle-to-everything (V2X) communication.

[0005] Figure 1 This diagram describes NR-based V2X communication compared to V2X communication based on RATs 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 RATs used prior to NR, the focus is on solutions that provide safety services based on V2X messages such as BSM (Basic Safety Message), CAM (Cooperation 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 CAM message type and / or an event-triggered DENM message type to another UE.

[0007] For example, a CAM can include dynamic vehicle status information such as direction and speed, static vehicle data such as size, and basic vehicle information such as exterior lighting status and route details. For example, a UE can broadcast a CAM, and the latency of a CAM can be less than 100ms. For example, a UE can generate a DENM and send it to another UE in an unexpected situation such as a vehicle breakdown or accident. For example, all vehicles within the UE's transmission range can receive the CAM and / or DENM. In this case, the DENM can take precedence over the CAM.

[0008] Since then, various V2X scenarios have been proposed for NR regarding V2X communications, including vehicle platooning, advanced driving, extended sensors, and remote driving.

[0009] For example, based on vehicle platooning, vehicles can be dynamically formed into groups to move together. For example, to perform platooning operations based on vehicle formation, vehicles in the group can receive periodic data from the lead vehicle. For example, vehicles in the group can use the periodic data to reduce or increase the spacing between vehicles.

[0010] For example, based on advanced driving, vehicles can be semi-autonomous or fully autonomous. For example, each vehicle can adjust its 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 through local sensors can be exchanged between vehicles, logical entities, pedestrian UEs, and / or V2X application servers. This allows the vehicle to recognize a further improved environment compared to the environment detected using its own sensors, for example.

[0012] For example, with remote driving, a remote driver or V2X application can operate or control a remote vehicle for a person who cannot drive or in a dangerous environment. For example, if the route is predictable (e.g., public transportation), cloud-based driving can be used to operate or control the remote vehicle. Furthermore, remote driving can consider accessing a cloud-based backend service platform, for example.

[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 communication. Summary of the Invention

[0014] Technical Purpose

[0015] In addition, in NR V2X communication or NR sidelink communication, the transmitting UE can reserve / select one or more transmission resources for sidelink transmission (e.g., initial transmission and / or retransmission), and the transmitting UE can inform the receiving UE of information about the location of the one or more transmission resources.

[0016] In addition, in NR V2X communication or NR sidelink communication, if the UE sends different transport blocks in different time periods, when the transmission of one transport block fails, there may be a problem of which resource period the UE uses to send the transport block.

[0017] For example, if the transmitting UE performs mode 2 periodic resource reservation, the question may be whether retransmissions associated with an initially transmitted or retransmitted transport block (e.g., MAC PDU) performed via resources on a specific time period can be performed via resources on another time period.

[0018] Technical Solution

[0019] In an embodiment, a method for a first device to perform wireless communication is proposed. The method may include the following steps: receiving information related to a configured grant (CG) resource, wherein the information related to the CG resource includes time period information about the CG resource; sending a first transmission block using resources within a first time period based on the time period information about the CG resource; and sending a second transmission block using resources within a second time period based on the time period information about the CG resource. For example, the resources within the second time period cannot be selected as resources for retransmitting the first transmission block.

[0020] Effects of the present disclosure

[0021] The user equipment (UE) can efficiently perform SL communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This diagram describes NR-based V2X communication compared to V2X communication based on RATs used before NR.

[0023] Figure 2 The structure of the NR system according to the embodiment of the present disclosure is shown.

[0024] Figure 3 The functional division between NG-RAN and 5GC based on an embodiment of the present disclosure is shown.

[0025] Figure 4 A radio protocol architecture according to an embodiment of the present disclosure is shown.

[0026] Figure 5 The structure of the NR system according to the embodiment of the present disclosure is shown.

[0027] Figure 6 The structure of the time slot of the NR frame based on the embodiment of the present disclosure is shown.

[0028] Figure 7 An example of a BWP according to an embodiment of the present disclosure is shown.

[0029] Figure 8 The radio protocol architecture of SL communication based on an embodiment of the present disclosure is shown.

[0030] Figure 9 A UE performing V2X or SL communication according to an embodiment of the present disclosure is shown.

[0031] Figure 10 A process of performing V2X or SL communication by a UE based on a transmission mode according to an embodiment of the present disclosure is shown.

[0032] Figure 11 Three types of casts based on embodiments of the present disclosure are shown.

[0033] Figure 12 A method in which a UE having reserved transmission resources notifies another UE of the transmission resources according to an embodiment of the present disclosure is shown.

[0034] Figure 13 An example of a timeline of reserved resources or selected resources transmitted by a transmitting UE through one SCI according to an embodiment of the present disclosure is shown.

[0035] Figure 14 Another example of a timeline of reserved resources or selected resources transmitted by a transmitting UE through one SCI according to an embodiment of the present disclosure is shown.

[0036] Figure 15 A process in which a transmitting UE transmits different transport blocks to a receiving UE according to an embodiment of the present disclosure is shown.

[0037] Figure 16 A method in which a first device according to an embodiment of the present disclosure sends different transmission blocks based on information related to CG resources is shown.

[0038] Figure 17 A method for a second device to receive different transport blocks from a first device according to an embodiment of the present disclosure is shown.

[0039] Figure 18 A communication system 1 according to an embodiment of the present disclosure is shown.

[0040] Figure 19A wireless device according to an embodiment of the present disclosure is shown.

[0041] Figure 20 A signal processing circuit for transmitting signals according to an embodiment of the present disclosure is shown.

[0042] Figure 21 Another example of a wireless device according to an embodiment of the present disclosure is shown.

[0043] Figure 22 A handheld device according to an embodiment of the present disclosure is shown.

[0044] Figure 23 A vehicle or autonomous vehicle according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0045] In the present disclosure, "A or B" may mean "only A", "only B", or "both A and B". In other words, in the present disclosure, "A or B" may be interpreted as "A and / or B". For example, in the present disclosure, "A, B or C" may mean "only A", "only B", "only C", or "any combination of A, B, and C".

[0046] As used in this disclosure, a slash ( / ) or a comma 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".

[0047] In the present disclosure, “at least one of A and B” may mean “only A”, “only B”, or “both A and B”. In addition, in the present disclosure, 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”.

[0048] In addition, in the present disclosure, “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.”

[0049] In addition, the brackets used in the present disclosure 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 the present disclosure is not limited to "PDCCH", and "PDDCH" may be proposed as an example of "control information". In addition, when indicated as "control information (i.e., PDCCH)", this may also mean that "PDCCH" is proposed as an example of "control information".

[0050] The technical features described in each of the drawings in the present disclosure may be implemented separately or simultaneously.

[0051] 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 the Universal Mobile Telecommunications System (UMTS). 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of Evolved UMTS (E-UMTS) that uses E-UTRA. 3GPP LTE uses OFDMA in the downlink and SC-FDMA in the uplink. LTE-Advanced (LTE-A) is an evolution of LTE.

[0052] 5G NR is a successor technology to LTE-A, a new mobile communication system with high performance, low latency, and high availability. 5G NR can use all available spectrum resources, including low-frequency bands below 1 GHz, intermediate frequency bands from 1 GHz to 10 GHz, and high-frequency bands (millimeter waves) above 24 GHz.

[0053] For clarity of description, the following description will mainly focus on LTE-A or 5G NR. However, the technical features according to the embodiments of the present disclosure are not limited thereto.

[0054] Figure 2 The structure of the NR system according to the 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.

[0055] Reference Figure 2, the next generation radio access network (NG-RAN) may include a BS 20 that provides user plane and control plane protocol termination for 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 by 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 by other terms such as a base transceiver system (BTS), an access point (AP), etc.

[0056] Figure 2 The embodiment of the present invention illustrates a case where only gNBs are included. BSs 20 may be connected to each other via an Xn interface. BSs 20 may be connected to each other via a fifth-generation (5G) core network (5GC) and an NG interface. More specifically, 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.

[0057] Figure 3 The functional division between NG-RAN and 5GC based on an embodiment of the present disclosure is shown. Figure 3 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0058] Reference Figure 3 The 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 provisioning, dynamic resource allocation, etc. The AMF can provide functions such as non-access stratum (NAS) security and idle state mobility processing. The UPF can provide functions such as mobility anchoring and protocol data unit (PDU) processing. The session management function (SMF) can provide functions such as user equipment (UE) Internet Protocol (IP) address allocation and PDU session control.

[0059] The radio interface protocol layers between the UE and the network can be categorized as Layer 1 (L1), Layer 2 (L2), and Layer 3 (L3) based on the lower three layers of the Open Systems Interconnection (OSI) model, which is well known in communication systems. The physical (PHY) layer belonging to Layer 1 provides information transmission services using physical channels, and the radio resource control (RRC) layer belonging to Layer 3 controls radio resources between the UE and the network. To this end, the RRC layer exchanges RRC messages between the UE and the base station layer.

[0060] Figure 4 A radio protocol architecture according to an embodiment of the present disclosure is shown. Figure 4 The embodiments of can be combined with various embodiments of the present disclosure. Specifically, Figure 4 (a) shows the radio protocol architecture for the user plane, and Figure 4 (b) shows a radio protocol architecture for the control plane. The user plane corresponds to a protocol stack for user data transmission, and the control plane corresponds to a protocol stack for control signal transmission.

[0061] Reference Figure 4 The physical layer provides information transfer services to upper layers via physical channels. The physical layer is connected to the media access control (MAC) layer, which is the upper layer of the physical layer, via transport channels. Data is transferred between the MAC layer and the physical layer via transport channels. Transport channels are categorized based on how data is transmitted over the radio interface and the characteristics of the data being transmitted.

[0062] Data is transmitted between different PHY layers (ie, the PHY layer of the transmitter and the PHY layer of the receiver) through a physical channel. The physical channel may be modulated using an Orthogonal Frequency Division Multiplexing (OFDM) scheme and uses time and frequency as radio resources.

[0063] The MAC layer provides services to the Radio Link Control (RLC) layer, a higher layer above the MAC layer, via logical channels. The MAC layer maps multiple logical channels to multiple transport channels. The MAC layer also provides logical channel multiplexing by mapping multiple logical channels to a single transport channel. The MAC layer provides data transmission services via logical channels.

[0064] The RLC layer performs concatenation, segmentation, and reassembly of radio link control service data units (RLC SDUs). To ensure the different quality of service (QoS) required for radio bearers (RBs), the RLC layer provides three types of operation modes: transparent mode (TM), unacknowledged mode (UM), and acknowledged mode (AM). AM RLC provides error correction through automatic repeat request (ARQ).

[0065] The Radio Resource Control (RRC) layer is defined only in the control plane. The RRC layer controls physical, transport, and logical channels, including the configuration, reconfiguration, and release of radio bearers. An RB is a logical path provided by Layer 1 (i.e., the PHY layer) and Layer 2 (i.e., the MAC layer, the RLC layer, and the PDCP (Packet Data Convergence Protocol) layer) to transmit data between the UE and the network.

[0066] The functions of the Packet Data Convergence Protocol (PDCP) layer in the user plane include user data transmission, header compression and encryption. The functions of the PDCP layer in the control plane include control plane data transmission and encryption / integrity protection.

[0067] 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.

[0068] RB configuration refers to the process of specifying radio protocol layers and channel attributes to provide a specific service and determining corresponding detailed parameters and operation methods. RBs can then be classified into two types: signaling radio bearers (SRBs) and data radio bearers (DRBs). SRBs are used as a path for transmitting RRC messages in the control plane. DRBs are used as a path for transmitting user data in the user plane.

[0069] When an 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 may be in the RRC idle (RRC_IDLE) state. In the case of NR, an RRC inactive (RRC_INACTIVE) state is additionally defined, and the UE in the RRC_INACTIVE state may maintain its connection with the core network while releasing its connection with the BS.

[0070] Data is sent from the network to the UE via downlink transport channels. Examples of downlink transport channels include the broadcast channel (BCH), which transmits system information, and the downlink shared channel (SCH), which transmits user traffic or control messages. Traffic or control messages for downlink multicast or broadcast services can be sent on the downlink SCH or on an additional downlink multicast channel (MCH). Data is sent from the UE to the network via uplink transport channels. Examples of uplink transport channels include the random access channel (RACH), which transmits initial control messages, and the uplink SCH, which transmits user traffic or control messages.

[0071] Examples of logical channels belonging to a higher layer than 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.

[0072] A physical channel includes multiple OFDM symbols in the time domain and multiple subcarriers in the frequency domain. A subframe includes multiple OFDM symbols in the time domain. A resource block is the unit of resource allocation and includes multiple OFDM symbols and multiple subcarriers. In addition, each subframe can use specific subcarriers of specific OFDM symbols (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) is the unit time for subframe transmission.

[0073] Figure 5 The structure of the NR system according to the 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.

[0074] 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 based on the subcarrier spacing (SCS). Each time slot can include 12 or 14 OFDM (A) symbols depending on the cyclic prefix (CP).

[0075] When using a normal CP, each time slot can include 14 symbols. When using an extended CP, each time slot can 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).

[0076] Table 1 below shows the number of symbols per slot (N) based on SCS setting (μ) when a normal CP is used. slot symb ), the number of time slots per frame (N frame,μ slot ) and the number of time slots per subframe (N subframe,μ slot ).

[0077] [Table 1]

[0078] <![CDATA[SCS(15*2 μ )]]> <![CDATA[N slot symb ]]> <![CDATA[N frame,μ slot ]]> <![CDATA[N subframe,μ slot ]]> 15KHz (μ=0) 14 10 1 30KHz (μ=1) 14 20 2 60KHz (μ=2) 14 40 4 120KHz (μ=3) 14 80 8 240KHz (μ=4) 14 160 16

[0079] 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 based on the SCS in case of using the extended CP.

[0080] [Table 2]

[0081] <![CDATA[SCS(15*2 μ )]]> <![CDATA[N slot symb ]]> <![CDATA[N frame,μ slot ]]> <![CDATA[N subframe,μ slot ]]> 60KHz (μ=2) 12 40 4

[0082] In the NR system, OFDM(A) parameter sets (e.g., SCS, CP length, etc.) may be configured differently between multiple cells integrated into one UE. Therefore, the (absolute time) duration (or interval) of a time resource (e.g., subframe, time slot, or 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.

[0083] 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 frequency bands can be supported, and with an SCS of 30kHz / 60kHz, dense urban areas, 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.

[0084] The NR frequency band can 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).

[0085] [Table 3]

[0086] Frequency range specification Corresponding frequency range Subcarrier spacing (SCS) FR1 450MHz–6000MHz 15, 30, 60kHz FR2 24250MHz–52600MHz 60, 120, 240kHz

[0087] As described above, the value of the frequency range in the NR system can 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 bands. The unlicensed bands may be used for various purposes, for example, the unlicensed bands are used for vehicle-specific communications (e.g., autonomous driving).

[0088] [Table 4]

[0089] Frequency range specification Corresponding frequency range Subcarrier spacing (SCS) FR1 410MHz–7125MHz 15, 30, 60kHz FR2 24250MHz–52600MHz 60, 120, 240kHz

[0090] Figure 6 The structure of the time slot of the NR frame based on the embodiment of the present disclosure is shown. Figure 6The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0091] Reference Figure 6 A slot includes multiple symbols in the time domain. For example, in the case of normal CP, one slot may include 14 symbols. For example, in the case of extended CP, one slot may include 12 symbols. Alternatively, in the case of normal CP, one slot may include 7 symbols. However, in the case of extended CP, one slot may include 6 symbols.

[0092] 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 activated BWPs. 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.

[0093] In addition, the radio interface between a UE and another UE or 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.

[0094] Hereinafter, a bandwidth part (BWP) and a carrier will be described.

[0095] A BWP may be a set of contiguous physical resource blocks (PRBs) within a given parameter set. A PRB may be selected from a set of contiguous portions of common resource blocks (CRBs) for a given parameter set on a given carrier.

[0096] When bandwidth adaptation (BA) is used, the reception bandwidth and transmission bandwidth of the user equipment (UE) do not need to be the same as the bandwidth of the cell, and the reception bandwidth and transmission bandwidth of the UE can be adjusted. For example, the UE can receive information / configuration for bandwidth adjustment from the network / BS. In this case, bandwidth adjustment can be performed based on the received information / configuration. For example, bandwidth adjustment can include reducing / increasing the bandwidth, changing the location of the bandwidth, or changing the subcarrier spacing of the bandwidth.

[0097] For example, the bandwidth can be reduced during periods of low activity to save power. For example, the location of the bandwidth can be moved in the frequency domain. For example, the location of the bandwidth can be moved in 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 allow different services to be carried out. For example, 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 BS / network configures a BWP for the UE and when the BS / network notifies the UE of the currently active BWP among the configured BWPs.

[0098] For example, the BWP may be at least 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 DL BWPs other than the activated DL BWP within the primary cell (PCell). For example, the UE cannot receive PDCCH, physical downlink shared channel (PDSCH), or channel state information-reference signal (CSI-RS) (except for RRM) from outside the activated DL BWP. For example, the UE cannot trigger channel state information (CSI) reporting for inactive DL BWPs. For example, the UE cannot send physical uplink control channel (PUCCH) or physical uplink shared channel (PUSCH) from outside the inactive DL BWP. For example, in the downlink, the initial BWP may be given as a set of contiguous RBs for the remaining minimum system information (RMSI) control resource set (CORESET) (configured by the physical broadcast channel (PBCH)). For example, in the uplink, the initial BWP may be given by the system information block (SIB) for the random access procedure. For example, the default BWP may be configured by higher layers. For example, the initial value of the default BWP may be the initial DL BWP. To save energy, if the UE cannot detect downlink control information (DCI) within a predetermined period of time, the UE may switch the active BWP of the UE to the default BWP.

[0099] In addition, a BWP can be defined for SL. The same SL BWP can be used in transmission and reception. For example, a transmitting UE can send a SL channel or SL signal on a specific BWP, and a receiving UE can receive a SL channel or SL signal on the 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 BS / 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.

[0100] Figure 7 An example of a BWP according to an embodiment of the present disclosure is shown. Figure 7 The embodiments of can be combined with various embodiments of the present disclosure. Figure 7 In an embodiment of the present invention, the number of BWPs is 3.

[0101] Reference Figure 7 , Common Resource Blocks (CRBs) may be carrier resource blocks numbered from one end of the carrier frequency band to the other. Additionally, PRBs may be resource blocks numbered within each BWP. Point A may indicate a common reference point for the resource block grid.

[0102] 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 can be an external reference point of the PRBs of a carrier, and subcarrier 0 of all parameter sets (e.g., all parameter sets supported by the network on the corresponding carrier) is aligned in point A. For example, the offset can be the PRB distance between the lowest subcarrier in a given parameter set and point A. For example, the bandwidth can be the number of PRBs in a given parameter set.

[0103] Hereinafter, V2X or SL communication will be described.

[0104] Figure 8 The radio protocol architecture of SL communication based on an embodiment of the present disclosure is shown. Figure 8 The embodiments of can be combined with various embodiments of the present disclosure. More specifically, Figure 8 (a) shows the user plane protocol stack, and Figure 8 (b) shows the control plane protocol stack.

[0105] Next, the sub-link synchronization signal (SLSS) and the synchronization information will be described in detail.

[0106] The SLSS may include a primary sublink synchronization signal (PSSS) and a secondary sublink synchronization signal (SSSS) as SL specific sequences. The PSSS may be referred to as a sublink primary synchronization signal (S-PSS), and the SSSS may be referred to as a sublink secondary synchronization signal (S-SSS). For example, an M sequence of length 127 may be used for the S-PSS, and a gold sequence of length 127 may be used for the S-SSS. For example, the UE may use the S-PSS for initial signal detection and synchronization acquisition. For example, the UE may use the S-PSS and the S-SSS for acquiring detailed synchronization and for detecting the synchronization signal ID.

[0107] The physical sidelink broadcast channel (PSBCH) can be a (broadcast) channel for transmitting default (system) information, which must be known by the UE before SL signal transmission / reception. For example, the default information can be information related to SLSS, duplex mode (DM), time division duplex (TDD) uplink / downlink (UL / DL) configuration, information related to resource pool, type of application related to SLSS, subframe offset, broadcast information, etc. For example, in order to evaluate PSBCH performance, in NR V2X, the payload size of PSBCH can be 56 bits, including a 24-bit cyclic redundancy check (CRC).

[0108] 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, sublink synchronization signal block (S-SSB)). The S-SSB can have the same parameter set (i.e., SCS and CP length) as the physical sublink control channel (PSCCH) / physical sublink shared channel (PSSCH) in the carrier, and the transmission bandwidth can exist within the (pre-) configured sublink (SL) BWP. For example, the S-SSB can have a bandwidth of 11 resource blocks (SBs). 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.

[0109] Figure 9 A UE performing V2X or SL communication according to an embodiment of the present disclosure is shown. Figure 9 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0110] Reference Figure 9 In V2X or SL communication, the term "UE" generally refers to a user's UE. However, if a network device such as a base station (BS) transmits / receives signals according to a communication scheme between UEs, the BS may also be considered a type of UE. For example, UE 1 may be first device 100, and UE 2 may be second device 200.

[0111] For example, UE 1 can select a resource unit corresponding to a specific resource from a resource pool representing a set of resources. Furthermore, UE 1 can transmit an SL signal using the resource unit. For example, a resource pool in which UE 1 can transmit a signal can be configured for UE 2, which is a receiving UE, and UE 1's signal can be detected in the resource pool.

[0112] Here, if UE 1 is within the connection range of the BS, the BS can inform UE 1 of the resource pool. Otherwise, if UE 1 is out of the connection range of the BS, another UE can inform UE 1 of the resource pool, or UE 1 can use a pre-configured resource pool.

[0113] Generally, a resource pool may be configured in units of multiple resources, and each UE may select one or more units of resources to use in its SL signal transmission.

[0114] Hereinafter, resource allocation in SL will be described.

[0115] Figure 10 A process of performing V2X or SL communication by a UE based on a transmission mode according to an embodiment of the present disclosure is shown. Figure 10 The embodiments of the present disclosure may be combined with the various embodiments of the present disclosure. In the 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 the LTE transmission mode. In NR, the transmission mode may be referred to as the NR resource allocation mode.

[0116] For example, Figure 10 (a) shows the UE operation related to LTE transmission mode 1 or LTE transmission mode 3. Alternatively, for example, Figure 10 (a) shows UE operations related to NR resource allocation mode 1. For example, LTE transmission mode 1 can be applied to conventional SL communication, and LTE transmission mode 3 can be applied to V2X communication.

[0117] For example, Figure 10 (b) shows the UE operation related to LTE transmission mode 2 or LTE transmission mode 4. Alternatively, for example, Figure 10 (b) shows the UE operation related to NR resource allocation mode 2.

[0118] Reference Figure 10 (a) In LTE transmission mode 1, LTE transmission mode 3, or NR resource allocation mode 1, the BS may schedule SL resources to be used by the UE for SL transmission. For example, the BS may perform resource scheduling for UE 1 through the PDCCH (more specifically, downlink control information (DCI)), and UE 1 may perform V2X or SL communication with UE 2 according to the resource scheduling. For example, UE 1 may transmit sidelink control information (SCI) to UE 2 through the physical sidelink control channel (PSCCH), and thereafter transmit data based on the SCI to UE 2 through the physical sidelink shared channel (PSSCH).

[0119] Reference Figure 10(b), in LTE transmission mode 2, LTE transmission mode 4 or NR resource allocation mode 2, the UE can determine the SL resources configured by the BS / network or the SL transmission resources within the pre-configured SL resources. For example, the configured SL resources or the pre-configured SL resources can be a resource pool. For example, the UE can autonomously select or schedule resources for SL transmission. For example, the UE can perform SL communication by autonomously selecting resources in the configured resource pool. For example, the UE can autonomously select resources within the selection window by performing sensing and resource (re)selection processes. For example, sensing can be performed in units of subchannels. In addition, UE 1, which has autonomously selected resources in the resource pool, can send SCI to UE 2 via PSCCH, and thereafter data based on the SCI can be sent to UE 2 via PSSCH.

[0120] Figure 11 Three types of casts based on embodiments of the present disclosure are shown. Figure 11 The embodiments of can be combined with various embodiments of the present disclosure. Specifically, Figure 11 (a) shows a broadcast type SL communication, Figure 11 (b) shows unicast type SL communication, and Figure 11 (c) shows multicast SL communication. In the case of unicast SL communication, the UE can perform one-to-one communication with another UE. In the case of multicast SL transmission, the UE can perform SL communication with one or more UEs in the group to which the UE belongs. In various embodiments of the present disclosure, SL groupcast communication can be replaced by SL multicast communication, SL one-to-many communication, etc.

[0121] In addition, in the present disclosure, for example, a transmitting UE (TX UE) may be a UE that transmits data to a (target) receiving UE (RX UE). For example, the TX UE may be a UE that performs PSCCH transmission and / or PSSCH transmission. Additionally / alternatively, for example, the TX UE may be a UE that transmits (one or more) SL CSI-RS and / or SL CSI report request indicator to a (target) RX UE. Additionally / alternatively, for example, the TX UE may be a UE that transmits a (control) channel (e.g., PSCCH, PSSCH, etc.) and / or (one or more) reference signals (e.g., DM-RS, CSI-RS, etc.) on a (control) channel to be used for SL radio link monitoring (RLM) operation and / or SL radio link failure (RLF) operation of the (target) RX UE.

[0122] In addition, in the present disclosure, for example, a receiving UE (RX UE) may be a UE that sends SL HARQ feedback to a transmitting UE (TXUE) based on whether data received from the TX UE is successfully decoded and / or whether a PSCCH (related to PSSCH scheduling) sent by the TX UE is successfully detected / decoded. Additionally / alternatively, for example, the RX UE may be a UE that performs SL CSI transmission to the TX UE based on (one or more) SL CSI-RS and / or SL CSI report request indicator received from the TX UE. Additionally / alternatively, for example, the RX UE is a UE that sends an SL (L1) reference signal received power (RSRP) measurement value measured based on an SL (L1) RSRP report request indicator and / or (one or more) (predefined) reference signals received from the TX UE to the TX UE. Additionally / alternatively, for example, the RX UE may be a UE that sends data of the RX UE to the TX UE. For example, the RX UE may be a UE that performs SLRLM operation and / or SL RLF operation based on a (pre-configured) (control) channel and / or reference signal(s) received from the TX UE on the (control) channel.

[0123] In addition, in the present disclosure, for example, in the case where the RX UE sends SLHARQ feedback information for the PSSCH and / or PSCCH received from the TX UE, the following options or some of the following options may be considered. In this document, for example, if the RX UE successfully decodes / detects the PSCCH that schedules the PSSCH, the following options or some of the following options may be applied with restrictions.

[0124] (1) Multicast Option 1: Negative Acknowledgement (NACK) information is sent to the TX UE only when the RX UE cannot decode / receive the PSSCH received from the TX UE.

[0125] (2) Multicast Option 2: If the RX UE successfully decodes / receives the PSSCH received from the TX UE, ACK information may be sent to the TX UE, and if the RX UE fails to decode / receive the PSSCH, NACK information may be sent to the TX UE.

[0126] In addition, in the present disclosure, for example, the TX UE may transmit the following information or some of the following information to the RX UE through the SCI. Here, for example, the TX UE may transmit some or all of the following information to the RX UE through the first SCI and / or the second SCI.

[0127] -PSSCH (and / or PSCCH) related resource allocation information (e.g., location / number of time / frequency resources, resource reservation information (e.g., time period))

[0128] -SL CSI report request indicator or SL (L1) reference signal received power (RSRP) (and / or SL (L1) reference signal received quality (RSRQ) and / or SL (L1) reference signal strength indicator (RSSI)) report request indicator

[0129] - (on PSSCH) SL CSI transmission indicator (or SL (L1) RSRP (and / or SL (L1) RSRQ and / or SL (L1) RSSI) information transmission indicator)

[0130] - Modulation and Coding Scheme (MCS) information

[0131] -TX power information

[0132] - L1 destination ID information and / or L1 source ID information

[0133] -SL HARQ process ID information

[0134] -New Data Indicator (NDI) information

[0135] - Redundancy Version (RV) information

[0136] -QoS information (for example, priority information) (related to the transmission service / packet)

[0137] -SL CSI-RS transmission indicator or information about the number of antenna ports used for (transmitting) SL CSI-RS

[0138] -TX UE location information or target RX UE location (or distance range) information (for which SL HARQ feedback is requested)

[0139] Reference signal (e.g., DM-RS, etc.) information related to decoding of data transmitted via the PSSCH (and / or channel estimation). For example, information related to the (time-frequency) mapping pattern of the DM-RS, rank information, antenna port index information, information on the number of antenna ports, etc.

[0140] In addition, in the present disclosure, for example, since the TX UE can transmit the SCI, the first SCI, and / or the second SCI to the RX UE via the PSCCH, the PSCCH can be replaced / replaced by the SCI, the first SCI, and / or the second SCI. Additionally or alternatively, the SCI can be replaced / replaced by the PSCCH, the first SCI, and / or the second SCI. Additionally or alternatively, for example, since the TX UE can transmit the second SCI to the RX UE via the PSSCH, the PSSCH can be replaced / replaced by the second SCI.

[0141] In addition, in the present disclosure, for example, if the SCI configuration field is divided into two groups in consideration of a (relatively) high SCI payload size, the first SCI including the first SCI configuration field group may be referred to as the first SCI, and the second SCI including the second SCI configuration field group may be referred to as the second SCI. Furthermore, for example, the first SCI may be transmitted to the receiving UE via the PSCCH. Furthermore, for example, the second SCI may be transmitted to the receiving UE via a (separate) PSCCH, or may be piggybacked and transmitted along with data via the PSSCH.

[0142] Furthermore, in the present disclosure, for example, the term "configuration" or the term "definition" may mean (pre-)configuration (for each resource pool) from a base station or a network (through predefined signaling (e.g., SIB, MAC, RRC, etc.)).

[0143] Furthermore, in the present disclosure, for example, since the RLF may be determined based on the out-of-sync (OOS) indicator or the in-sync (IS) indicator, the RLF may be replaced / substituted by the out-of-sync (OOS) indicator or the in-sync (IS) indicator.

[0144] In addition, in the present disclosure, for example, RBs may be replaced / replaced by subcarriers. In addition, for example, packets or services may be replaced / replaced by TBs or MAC PDUs based on a transport layer.

[0145] Furthermore, in the present disclosure, CBG may be replaced / replaced by TB.

[0146] Furthermore, in the present disclosure, for example, a source ID may be exchanged / replaced by a destination ID.

[0147] In addition, in the present disclosure, for example, the L1 ID may be replaced / replaced by the L2 ID. For example, the L1 ID may be the L1 source ID or the L1 destination ID. For example, the L2 ID may be the L2 source ID or the L2 destination ID.

[0148] In addition, in the present disclosure, for example, the operation of the sending UE reserving / selecting / determining (one or more) retransmission resources may include: determining the actual used sending UE reservation / selecting / determining (one or more) potential retransmission resources based on the SL HARQ feedback information received from the receiving UE.

[0149] Furthermore, in the present disclosure, a sub-selection window may be replaced / replaced by a selection window and / or a preconfigured number of resource sets within the selection window, or vice versa.

[0150] In addition, in the present disclosure, SL MODE 1 may refer to a resource allocation method or a communication method in which a base station directly schedules (one or more) SL transmission resources for a TX UE through predefined signaling (e.g., DCI or RRC message). For example, SL MODE 2 may refer to a resource allocation method or a communication method in which a UE independently selects (one or more) SL transmission resources in a resource pool preconfigured or configured by a base station or a network. For example, a UE that performs SL communication based on SL MODE 1 may be referred to as a MODE 1UE or a MODE 1TX UE, and a UE that performs SL communication based on SL MODE 2 may be referred to as a MODE 2UE or a MODE 2TX UE.

[0151] In addition, in the present disclosure, for example, a dynamic grant (DG) may be replaced / replaced by a configuration grant (CG) and / or a semi-persistent scheduling (SPS) grant, or vice versa. For example, the DG may be replaced / replaced by a combination of a CG and an SPS grant, or vice versa. For example, the CG may include at least one of a configuration grant (CG) type 1 and / or a configuration grant (CG) type 2. For example, in CG type 1, the grant may be provided by RRC signaling and may be stored as a configuration grant. For example, in CG type 2, the grant may be provided by PDCCH and may be stored or deleted as a configuration grant based on L1 signaling indicating the enabling or disabling of the grant.

[0152] Furthermore, in the present disclosure, a channel may be replaced / replaced by a signal, or vice versa. For example, the transmission / reception of a channel may include the transmission / reception of a signal. For example, the transmission / reception of a signal may include the transmission / reception of a channel. Furthermore, for example, a broadcast may be replaced / replaced by at least one of unicast, multicast, and / or broadcast, or vice versa. For example, a broadcast type may be replaced / replaced by at least one of unicast, multicast, and / or broadcast, or vice versa.

[0153] Furthermore, in the present disclosure, a resource may be exchanged / replaced by a time slot or a symbol, or vice versa. For example, a resource may include a time slot and / or a symbol.

[0154] Furthermore, in the present disclosure, priority may be replaced / substituted by at least one of logical channel priority (LCP), latency, reliability, minimum required communication range, ProSe (Proximity Services) Per Packet Priority (PPP), side link radio bearer (SLRB), QoS profile, QoS parameters and / or requirements, or vice versa.

[0155] Furthermore, in various embodiments of the present disclosure, reserved resources and / or selected resources may be replaced / substituted by side-link grants (SL grants).

[0156] Furthermore, in various embodiments of the present disclosure, latency may be replaced / substituted by a packet delay budget (PDB).

[0157] In addition, in various embodiments of the present invention, the message for triggering the reporting of sublink channel state information / sublink channel quality information (hereinafter, SL_CSI information) can be replaced / substituted by receiving a sublink channel state information reference signal (CSI-RS).

[0158] Furthermore, in the present disclosure, blind retransmission may refer to the TX UE performing retransmission without receiving SL HARQ feedback information from the RX UE. For example, SL HARQ feedback-based retransmission may refer to the TX UE determining whether to perform retransmission based on SL HARQ feedback information received from the RX UE. For example, if the TX UE receives NACK and / or DTX information from the RX UE, the TX UE may perform retransmission to the RX UE.

[0159] Furthermore, in the present disclosure, for example, for convenience of description, a (physical) channel used when an RX UE transmits at least one of the following information to a TX UE may be referred to as a PSFCH.

[0160] -SL HARQ feedback, SL CSI, SL (L1) RSRP

[0161] In addition, in the present disclosure, Uu channels may include UL channels and / or DL ​​channels. For example, UL channels may include PUSCH, PUCCH, Sounding Reference Signal (SRS), etc. For example, DL channels may include PDCCH, PDSCH, PSS / SSS, etc. For example, SL channels may include PSCCH, PSSCH, PSFCH, PSBCH, PSSS / SSSS, etc.

[0162] In addition, in the present disclosure, the side link information may include at least one of a side link message, a side link packet, a side link service, a side link data, a side link control information and / or a side link transport block (TB). For example, the side link information may be sent via PSSCH and / or PSCCH.

[0163] In addition, in NR V2X communication or NR sidelink communication, the transmitting UE can reserve / select one or more transmission resources for sidelink transmission (e.g., initial transmission and / or retransmission), and the transmitting UE can send information about the location of one or more transmission resources to the receiving UE.

[0164] In addition, when performing secondary link communication, a method in which the transmitting UE reserves or predetermines transmission resources for the receiving UE may be representatively as follows.

[0165] For example, the transmitting UE may perform the reservation of transmission resources based on the chain. Specifically, for example, if the transmitting UE reserves K transmission resources, the transmitting UE may send the location information of less than K transmission resources to the receiving UE through the SCI sent to the receiving UE at any (or specific) transmission time or time resource. That is, for example, the SCI may include the location information of less than K transmission resources. Alternatively, for example, if the transmitting UE reserves K transmission resources associated with a specific TB, the transmitting UE may send the location information of less than K transmission resources to the receiving UE through the SCI sent to the receiving UE at any (or specific) transmission time or time resource. That is, the SCI may include the location information of less than K transmission resources. In this case, for example, by signaling the location information of less than K transmission resources to the receiving UE via only one SCI sent by the transmitting UE at any (or specific) transmission time or time resource, performance degradation due to an excessive increase in the payload of the SCI may be prevented.

[0166] Figure 12 A method in which a UE having reserved transmission resources notifies another UE of the transmission resources according to an embodiment of the present disclosure is shown. Figure 12 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0167] Specifically, for example, Figure 12 (a) shows a method for performing chain-based resource reservation by a transmitting UE by transmitting / signaling location information of (maximum) 2 transmission resources to a receiving UE via one SCI in the case of a value of K=4. For example, Figure 12 (b) shows a method for performing chain-based resource reservation by a transmitting UE by transmitting / signaling location information of (maximum) 3 transmission resources to a receiving UE via one SCI in the case of a value of K=4. Figure 12 (a) and (b), the transmitting UE may transmit / signal only the location information of the fourth transmission-related resource to the receiving UE via the fourth (or last) transmission-related PSCCH. Figure 12 (a), the transmitting UE may transmit / signal not only the location information of the fourth transmission-related resource but also the location information of the third transmission-related resource to the receiving UE via the fourth (or last) transmission-related PSCCH. Figure 12(b), the transmitting UE may transmit / signal not only the location information of the fourth transmission-related resource but also the location information of the second transmission-related resource and the location information of the third transmission-related resource to the receiving UE through the fourth (or last) transmission-related PSCCH. In this case, for example, Figure 12 In (a) and (b), if the transmitting UE can transmit / signal only the location information of the fourth transmission-related resources to the receiving UE through the fourth (or last) transmission-related PSCCH, the transmitting UE can set or designate the field / bit of the location information of the unused or remaining transmission resources to a preconfigured value (e.g., 0). Figure 12 In (a) and (b), if the sending UE can send / signal only the location information of the fourth transmission-related resources to the receiving UE through the fourth (or last) transmission-related PSCCH, the sending UE can set or designate the field / bit of the location information of the unused or remaining transmission resources to a preconfigured state / bit value indicating / representing the last transmission (among the 4 transmissions).

[0168] In addition, for example, the transmitting UE may perform reservation of transmission resources on a block basis. Specifically, for example, if the transmitting UE reserves K transmission resources, the transmitting UE may send the location information of the K transmission resources to the receiving UE through an SCI sent to the receiving UE at any (or specific) transmission time or time resource. That is, the SCI may include the location information of the K transmission resources. For example, if the transmitting UE reserves K transmission resources associated with a specific TB, the transmitting UE may send the location information of the K transmission resources to the receiving UE through an SCI sent to the receiving UE at any (or specific) transmission time or time resource. That is, the SCI may include the location information of the K transmission resources. For example, Figure 12 (c) shows a method of performing block-based resource reservation by the transmitting UE by signaling location information of 4 transmission resources to the receiving UE via one SCI in the case of a value of K=4.

[0169] In addition, for example, in order to reduce the probability that the resources used for the initial transmission and / or retransmission of the sending UE partially or completely conflict / overlap with the resources used for the initial transmission and / or retransmission of other sending UEs, the UE can perform resource reservation based on the method described in Table 5.

[0170] [Table 5]

[0171]

[0172]

[0173] Referring to Table 5, the resources used by the UE to perform the initial transmission and the resources reserved by the UE for retransmission may have the same number of subchannels. For example, based on alternative 1-1, the UE may reserve (one or more) resources for retransmitting TBs through a larger number of subchannels by using (one or more) single subchannel reserved resources (e.g., PSCCH and PSSCH). Here, for example, the PSSCH RE may be occupied by a second SCI and SCH. For example, based on alternative 1-2, the UE may reserve resources for the initial transmission and (one or more) possible retransmissions of the TB using a larger number of subchannels by using (one or more) single subchannel reserved resources (e.g., PSCCH and PSSCH). Here, for example, all available PSSCH REs in a single subchannel may be occupied only by the second SCI. For example, according to alternative 2, the UE should reserve resources for retransmission equal to the number of subchannels of the resources used to perform the initial transmission.

[0174] In addition, for example, before a sending UE that reserves / selects resources sends SL information by using the reserved / selected resources, the sending UE may perform operations based on the method described in Table 6 so that the sending UE checks / determines whether the resources reserved / selected by itself conflict / overlap with the transmission resources reserved / selected by other UEs.

[0175] [Table 6]

[0176]

[0177]

[0178] Referring to Table 6, before the transmitting UE transmits SCI by using the reserved / selected resources, the transmitting UE may identify candidate resources in the resource selection window and may re-evaluate the selection of resources for (re)transmission among the identified candidate resources. For example, in the resource (re)selection process, it is assumed that the transmitting UE identifies candidate resources in the resource selection window and selects a first resource for (re)transmission from among the identified candidate resources. In this case, before the transmitting UE transmits SCI by using the first resource, the transmitting UE may perform a re-evaluation based on the resource (re)selection process.

[0179] For example, for a given time instant n at which the resource (re)selection and re-evaluation process is triggered, the resource selection window may start at time (n+T1) and end at time (n+T2). Here, for example, it may be T1 ≥ 0. For example, for a given time instant n at which the resource (re)selection and re-evaluation process is triggered, the sensing window may be defined as the time interval [n-T0, nT proc,0]. For example, T0 can be configured or pre-configured for the UE. For example, the UE can receive information related to T0 from the network / base station. For example, it can be T0>T proc,0 .

[0180] For example, the UE may select resource(s) for all expected (re)transmissions within a packet delay budget (PDB).For example, the UE may perform resource reselection based on the number of expected (re)transmissions.

[0181] For example, the sending UE may be configured to select / reserve resources for transmission of the same TB or different TBs based on some or all of the following rules. For example, the sending UE may select / reserve resources for transmission of the same TB or different TBs based on some or all of the following rules. Herein, for example, the time period value and / or time gap value (e.g., options 1-a and / or 1-b in Table 7) sent / signaled by the sending UE via the preconfigured field (hereinafter, TG_FD) included in the SCI may be preconfigured / restricted by the base station / network. For example, the time period value and / or time gap value sent / signaled by the sending UE via the preconfigured TG_FD included in the SCI may be preconfigured / restricted by the base station / network for each pool. For ease of description, the time period value and / or time gap value sent / signaled by the sending UE via the TG_FD may be referred to as TG_VAL.

[0182] For example, the transmitting UE may transmit index information associated with multiple pre-configured TG_VALs via TG_FD. And / or, for example, a TG_VAL linked to each TG_FD-related state may be pre-configured. For example, the relationship between the TG_FD-related state and the TG_VAL may be pre-configured. For example, a specific TG_FD-related state and a specific TG_VAL may be associated.

[0183] For example, in some or all of the following rules, the window (W) value may be a PDB or a remaining PDB. And / or, for example, the W value may be a time gap that the UE may buffer. For example, the W value may be a maximum time gap that the UE may buffer for HARQ combined operation. Herein, for example, if the timing of a specific resource among the selected / reserved resources that the transmitting UE sends / signals to the receiving UE via SCI is outside the W value range, the transmitting UE may send different SL information (e.g., a packet, a message, or a TB) by using the specific resource. For example, if in N MAXIf the timing of a specific resource among the selected / reserved resources that a transmitting UE within the range of W transmits / signals to a receiving UE through one SCI is outside the range of W, the transmitting UE may transmit different SL information (e.g., a packet, a message, or a TB) by using the specific resource. For example, the transmitting UE may transmit first SL information by using resources within the range of W, and the transmitting UE may transmit second SL information by using resources outside the range of W. For example, N MAX It may be the maximum number of resources that a transmitting UE can transmit / signal through one SCI.

[0184] [Table 7]

[0185]

[0186]

[0187] Referring to Table 7, if the SL resources reserved for the initial transmission of a TB through the SCI associated with another TB are disabled, then N MAX It may be 3. For example, if resource reservation for the transmitting UE to perform initial transmission of the second SL by using the SCI associated with the first SL information is disabled, the transmitting UE can transmit information on up to three resources by using one SCI.

[0188] For example, if it is enabled to reserve SL resources for initial transmission of a TB by using SCI associated with another TB, various options may exist. For example, if it is enabled that the sending UE performs resource reservation for initial transmission of second SL information by using SCI associated with first SL information, various options may exist.

[0189] For example, based on Option 1-a, the transmitting UE may send / signal "period > W" via the SCI. For example, based on Option 1-b, the transmitting UE may send / signal "time slot > W" via the SCI. For example, based on Option 2, there may be no additional field in the SCI for distinguishing reservations for other TBs (NDI and HARQ ID are used when receiving the SCI).

[0190] Based on the embodiments of the present disclosure, it is assumed that the sending UE can reserve / select transmission resources (e.g., initial transmission resources or retransmission resources) related to the second SL information through the SCI related to the first SL information based on a rule or a partial rule (e.g., option 1-a or option 1-b). For example, it is assumed that the sending UE fails to successfully send the SL information by using resources (sets) within a specific time period and / or time gap repetition time, and the sending UE retransmits the SL information by using (one or more) additional (re)transmission resources (hereinafter, ADD_RETX) determined by a chain-based and / or block-based resource reservation / selection method. For example, it is assumed that the sending UE receives a HARQ-NACK for the sent SL information from the receiving UE, and the sending UE retransmits the SL information by using ADD_RETX.

[0191] For example, under the assumptions mentioned above, the sending UE cannot reserve / select (one or more) ADD_RETX resources in subsequent time periods and / or time slot repetition times. Herein, for example, based on the above rules, additional retransmissions associated with SL information sent based on resources in a specific time period and / or time slot repetition time are not associated with resources in subsequent time periods and / or time slot repetition times. For example, based on the rules, in terms of transmission resource reservation / selection operations, additional retransmissions associated with SL information initially transmitted based on a resource set in a specific time period and / or time slot repetition time are not associated with a resource set in subsequent time periods and / or time slot repetition times. Herein, for example, based on the above rules, the sending UE can independently configure / schedule / allocate ADD_RETX between resources in different time periods and / or time slot repetition times. For example, the resources can include resource sets. And / or, for example, according to the above rules, ADD_RETX sharing / borrowing cannot be performed between resources in different time periods and / or time slot repetition times. Herein, for example, if the transmitting UE is not allowed to send / signal information related to the reservation / selection of (one or more) additional retransmission resources in the SCI related to ADD_RETX in a subsequent time period and / or time gap repetition time, the above rules may apply. For example, if the maximum time gap value in the SCI related to ADD_RETX does not reach the subsequent time period and / or time gap repetition time, the above rules may apply. For example, the maximum time gap may be a preconfigured maximum time gap. Herein, for example, if the transmitting UE performs a retransmission operation based on HARQ feedback, the above rules may apply. For example, if the transmitting UE performs a blind retransmission operation, the transmitting UE may abnormally reserve / select (one or more) ADD_RETX resources in the subsequent time period and / or time gap repetition time.

[0192] For example, under the above-mentioned assumptions, the transmitting UE may reserve / select(s) ADD_RETX resources in the subsequent period and / or time slot repetition time.

[0193] For example, under the above-mentioned assumptions, the transmitting UE may reserve / select (one or more) ADD_RETX resources based on a chain or block-based resource reservation / selection method. And / or, for example, the transmitting UE may reserve / select (one or more) ADD_RETX resources based on a resource reservation / selection method based on option 1-a or 1-b.

[0194] For example, if the above rules are applied, the timeline of the reserved / selected resources that the transmitting UE sends / signals through one SCI can be configured as follows. Herein, for example, for ease of description, it is assumed that the transmitting UE sends / signals information about three reserved / selected resources by using one SCI, but the proposed method of the present disclosure can also be extended to other situations. Herein, for example, the transmitting UE can send information about the starting position / size of the frequency of the second resource (e.g., resource indication value (RIV)) and information about the time gap between the first resource and the second resource through the first SCI sent. In addition, for example, the transmitting UE can send / signal information about the time gap between the second resource and the third resource and information about the starting position of the frequency of the third resource (e.g., if the total number of subchannels in the time slot is X, then signaling is performed using a field of log2(X) bits) through the first SCI sent. Here, it is assumed that the sizes of the frequency resources associated with the three transmission resources are the same. For example, if the total number of subchannels in the time slot is X, then information about the starting position of the resource frequency can be signaled using a field of log2(X) bits.

[0195] Figure 13 An example of a timeline of reserved resources or selected resources transmitted by a transmitting UE through one SCI according to an embodiment of the present disclosure is shown.

[0196] Reference Figure 13 For example, if the transmitting UE transmits an odd-numbered SCI, the transmitting UE may transmit / signal information about the next two resources including the resource at the time of SCI transmission through the SCI. For example, if the transmitting UE transmits an even-numbered SCI, the transmitting UE may transmit / signal information about the previous / next resources including the resource at the time of SCI transmission through the SCI.

[0197] Figure 14 Another example of a timeline of reserved resources or selected resources transmitted by a transmitting UE through one SCI according to an embodiment of the present disclosure is shown.

[0198] Reference Figure 14 For example, within a set of three reserved / selected resources, if the transmitting UE transmits a first SCI, the transmitting UE may transmit / signal information about the next two resources including the resource at the time of SCI transmission via the SCI. For example, if the transmitting UE transmits a second SCI, the transmitting UE may transmit / signal information about the previous / next resources including the resource at the time of SCI transmission via the SCI. For example, if the transmitting UE transmits a third SCI, the transmitting UE may transmit / signal information about the first transmission and the second transmission on the set of three subsequent reserved / selected resources including the resource at the time of SCI transmission via the SCI.

[0199] For example, based on whether the UE performs a chain-based resource reservation operation, the UE may determine whether to apply at least one of the rules proposed in various embodiments of the present disclosure. And / or, for example, based on whether the UE performs a block-based resource reservation operation, the UE may determine whether to apply at least one of the rules proposed in various embodiments of the present disclosure. And / or, for example, based on whether the UE performs a blind retransmission operation, the UE may determine whether to apply at least one of the rules proposed in various embodiments of the present disclosure. And / or, for example, based on whether the UE performs a retransmission operation based on SL HARQ feedback, the UE may determine whether to apply at least one of the rules proposed in various embodiments of the present disclosure. And / or, for example, based on whether the UE performs a configured grant-based resource selection / reservation operation, the UE may determine whether to apply at least one of the rules proposed in various embodiments of the present disclosure. And / or, for example, based on whether the UE performs a dynamic grant-based resource selection / reservation operation, the UE may determine whether to apply at least one of the rules proposed in various embodiments of the present disclosure.

[0200] And / or, for example, whether the UE applies at least one of the rules proposed in the various embodiments of the present disclosure may be configured differently or limitedly for each resource pool. And / or, for example, whether the UE applies at least one of the rules proposed in the various embodiments of the present disclosure may be configured differently or limitedly for each service type. And / or, for example, whether the UE applies at least one of the rules proposed in the various embodiments of the present disclosure may be configured differently or limitedly for each service priority. And / or, for example, whether the UE applies at least one of the rules proposed in the various embodiments of the present disclosure may be configured differently or limitedly for each playback type. For example, the playback type may include at least one of unicast, multicast, and / or broadcast. And / or, for example, whether the UE applies at least one of the rules proposed in the various embodiments of the present disclosure may be configured differently or limitedly for each destination UE. And / or, for example, whether the UE applies at least one of the rules proposed in the various embodiments of the present disclosure may be configured differently or limitedly for each (L1 or L2) destination ID. And / or, for example, whether the UE applies at least one of the rules proposed in the various embodiments of the present disclosure may be configured differently or limitedly for each (L1 or L2) source ID. And / or, for example, whether the UE applies at least one of the rules proposed in the various embodiments of the present disclosure may be configured differently or limitedly for each (service) QoS parameter. For example, the (service) QoS parameter may include at least one of a reliability-related parameter, a latency-related parameter, and / or a (target) BLER-related parameter. And / or, for example, whether the UE applies at least one of the rules proposed in the various embodiments of the present disclosure may be configured differently or limitedly for each (resource pool) congestion level. And / or, for example, whether the UE applies at least one of the rules proposed in the various embodiments of the present disclosure may be configured differently or limitedly for each SL mode type. For example, the SL mode type may include SL mode 1 and / or SL mode 2. And / or, for example, whether the UE applies at least one of the rules proposed in the various embodiments of the present disclosure may be configured differently or limitedly for each grant type. For example, the grant type may include a configured grant and / or a dynamic grant. And / or, for example, whether the UE applies at least one of the rules proposed in various embodiments of the present disclosure may be configured differently or limitedly for each packet / message (e.g., TB) size. And / or, for example, whether the UE applies at least one of the rules proposed in various embodiments of the present disclosure may be configured differently or limitedly for each number of subchannels used by the UE to transmit the PSSCH.And / or, for example, whether the UE applies at least one of the rules proposed in various embodiments of the present disclosure may be configured differently or limitedly for each number of RBs used by the UE to transmit the PSCCH. And / or, for example, whether the UE applies at least one of the rules proposed in various embodiments of the present disclosure may be configured differently or limitedly for each number of RBs included in (one) subchannel. And / or, for example, whether the UE applies at least one of the rules proposed in various embodiments of the present disclosure may be configured differently or limitedly for each number of subchannels included in a resource pool and / or for each number of RBs included in a resource pool. And / or, for example, whether the UE applies at least one of the rules proposed in various embodiments of the present disclosure may be configured differently or limitedly for each UE based on whether the size of (one) subchannel is the same as the PSCCH (frequency) resource size.

[0201] For example, based on whether the UE performs a chain-based resource reservation operation, the parameters may be configured differently or limited for the UE. And / or, for example, based on whether the UE performs a block-based resource reservation operation, the parameters may be configured differently or limited for the UE. And / or, for example, based on whether the UE performs a blind retransmission operation, the parameters may be configured differently or limited for the UE. And / or, for example, based on whether the UE performs a retransmission operation based on SL HARQ feedback, the parameters may be configured differently or limited for the UE. And / or, for example, based on whether the UE performs a configured grant-based resource selection / reservation operation, the parameters may be configured differently or limited for the UE. And / or, for example, based on whether the UE performs a dynamic grant-based resource selection / reservation operation, the parameters may be configured differently or limited for the UE.

[0202] And / or, for example, parameters may be configured differently or limited for each resource pool for the UE. And / or, for example, parameters may be configured differently or limited for each service type for the UE. And / or, for example, parameters may be configured differently or limited for each service priority for the UE. And / or, for example, parameters may be configured differently or limited for each broadcast type for the UE. For example, the broadcast type may include at least one of unicast, multicast, and / or broadcast. And / or, for example, parameters may be configured differently or limited for each destination UE. And / or, for example, parameters may be configured differently or limited for each (L1 or L2) destination ID for the UE. And / or, for example, parameters may be configured differently or limited for each (L1 or L2) source ID for the UE. And / or, for example, parameters may be configured differently or limited for each (service) QoS parameter for the UE. For example, the (service) QoS parameter may include at least one of a reliability-related parameter, a latency-related parameter, and / or a (target) BLER-related parameter. And / or, for example, parameters may be configured differently or limitedly for the UE for each (resource pool) congestion level. And / or, for example, parameters may be configured differently or limitedly for the UE for each SL mode type. For example, the SL mode type may include SL mode 1 and / or SL mode 2. And / or, for example, parameters may be configured differently or limitedly for the UE for each grant type. For example, the grant type may include a configured grant and / or a dynamic grant. And / or, for example, parameters may be configured differently or limitedly for the UE for each packet / message (e.g., TB) size. And / or, for example, parameters may be configured differently or limitedly for the UE for each number of subchannels used by the UE to send PSSCH. And / or, for example, parameters may be configured differently or limitedly for the UE for each number of RBs used by the UE to send PSCCH. And / or, for example, parameters may be configured differently or limitedly for the UE for each number of RBs included in (one) subchannel. And / or, for example, parameters may be configured differently or limitedly for each UE for each number of subchannels included in the resource pool and / or each number of RBs included in the resource pool. And / or, for example, parameters may be configured differently or limitedly for each UE based on whether the size of (one) subchannel is the same as the PSCCH (frequency) resource size.

[0203] Based on an embodiment of the present disclosure, the MAC entity may select to generate a selected sidelink grant corresponding to a transmission associated with multiple MAC PDUs. For example, the MAC entity may select sidelink data to generate a selected sidelink grant corresponding to a transmission associated with multiple MAC PDUs. For example, the sidelink data may be used in a logical channel. For example, if one or more HARQ retransmissions are selected, the MAC entity may regard the first transmission opportunity set as an initial transmission opportunity and the other transmission opportunity sets as retransmission opportunities. For example, the MAC entity may regard the set of initial transmission opportunities and retransmission opportunities as a selected sidelink grant.

[0204] Based on an embodiment of the present disclosure, for each side-link grant, if the MAC entity determines that each of the side-link grants is for initial transmission, the side-link HARQ entity may associate the side-link process with the grant. For example, for the associated side-link process, the side-link HARQ entity may obtain a MAC PDU to be sent from the multiplexing and assembly entity. For example, for each side-link grant, if the side-link grant is a configured side-link grant and the MAC PDU in the sl-PeriodCG in which the side-link grant is configured is not obtained, the side-link HARQ entity may associate the side-link process with the grant. For example, for the associated side-link process, the side-link HARQ entity may obtain a MAC PDU to be sent from the multiplexing and assembly entity.

[0205] For example, in Mode 2, if a transmitting UE reserves periodic resources, it cannot perform retransmissions associated with a transport block using resources in a period other than the period associated with the resources in which the initial transmission was performed. That is, for example, when performing transmissions associated with a transport block, the transmitting UE can only use resources within one period. Accordingly, in Mode 2 operation, the receiving UE can implicitly determine the start / end time of resources used for reception associated with a particular transport block. For example, the receiving UE can flush the associated buffer without anticipating any further retransmissions after the end time.

[0206] Figure 15 A process in which a transmitting UE transmits different transport blocks to a receiving UE according to an embodiment of the present disclosure is shown. Figure 15 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0207] Reference Figure 15 In step S1510, the transmitting UE may receive information related to the CG resource from the base station. For example, the information related to the CG resource may include at least one of period information about the CG resource, information about the time domain related to the CG resource, information about the frequency domain related to the CG resource, or an offset related to the CG resource.

[0208] In step S1520, the transmitting UE may transmit the first transmission block to the receiving UE via (one or more) resources within the first time period. For example, the transmitting UE may transmit the first transmission block to the receiving UE via (one or more) resources within the first time period based on the time period information about the CG resources.

[0209] In step S1530, the transmitting UE may transmit the second transport block to the receiving UE via the resource(s) within the second time period. For example, the transmitting UE may transmit the second transport block to the receiving UE via the resource(s) within the second time period based on the time period information regarding the CG resources. For example, the resource(s) within the first time period and the resource(s) within the second time period may not be shared with each other. For example, the second transport block may be a transport block transmitted via resources reserved after the maximum time gap that can be signaled via the SCI. For example, the transmitting UE may not select resources within the second time period as resources for retransmitting the first transport block. For example, based on a transmission failure of the first transport block, the transmitting UE may reserve resources for retransmitting the first transport block. For example, information related to the resources within the second time period may not be signaled via sidelink control information (SCI) related to the resources used to retransmit the first transport block. For example, the retransmission of the first transport block may be a retransmission based on HARQ feedback. For example, based on the transmitting UE successfully transmitting the first transport block, the transmitting UE may not select resources within the first time period after the successful transmission of the first transport block as resources for transmitting the second transport block. For example, the transmitting UE may select resources for retransmitting the first transport block based on chain-based resource selection or block-based resource selection.

[0210] For example, the transmitting UE may send the SCI to the receiving UE via the PSCCH. For example, the SCI may include a preconfiguration field. For example, the preconfiguration field may include a time period associated with the first transport block or a time gap associated with the first transport block. For example, based on the fact that the SCI is associated with the first resource, the SCI may include at least one of the starting position of the frequency domain associated with the second resource, the frequency domain size of the second resource, the starting position of the frequency domain associated with the third resource, the frequency domain size of the third resource, information about the time gap between the first resource and the second resource, or information about the time gap between the second resource and the third resource. For example, the starting position of the frequency domain associated with the second resource and the starting position of the frequency domain associated with the third resource may be indicated by a field of log2(X) bits. For example, X may be the total number of subchannels in a time slot. In addition, for example, based on the fact that the SCI is associated with an odd-numbered resource, the SCI may include information about the resource associated with the SCI and two resources following the resource associated with the SCI. For example, based on the SCI being an SCI associated with an even-numbered resource, the SCI may include information on the resource associated with the SCI, resources preceding the resource associated with the SCI, and resources following the resource associated with the SCI.

[0211] In the above embodiment, for ease of description, it is assumed that the receiving UE receiving the first transport block is the same as the receiving UE receiving the second transport block. Alternatively, for example, the receiving UE receiving the first transport block may be different from the receiving UE receiving the second transport block.

[0212] Figure 16 A method in which a first device according to an embodiment of the present disclosure sends different transmission blocks based on information related to CG resources is shown. Figure 16 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0213] Reference Figure 16 In step S1610, the first device 100 may receive information related to a configured license (CG) resource. For example, the first device 100 may receive information related to a CG resource from a base station. For example, the first device 100 may receive information related to a CG resource from a second device 200. For example, information related to a CG resource may be preconfigured for the first device 100. For example, the information related to the CG resource may include time period information about the CG resource.

[0214] In step S1620, the first device 100 may send the first transport block through the resources within the first time period based on the time period information about the CG resources. For example, the first device 100 may reserve resources for retransmitting the first transport block based on the transmission failure of the first transport block. For example, information related to the resources within the second time period cannot be signaled through the sub-link control information (SCI) related to the resources for retransmitting the first transport block. For example, the retransmission of the first transport block may be a retransmission based on HARQ feedback. For example, the first device 100 may select the resources for retransmitting the first transport block based on link-based resource selection or block-based resource selection.

[0215] In step S1630, the first device 100 may send a second transmission block through resources within a second time period based on the time period information about the CG resources. For example, resources within the second time period cannot be selected as resources for retransmitting the first transmission block. For example, resources within the first time period and resources within the second time period cannot be shared with each other. For example, based on the successful transmission of the first transmission block, the first device 100 cannot select the side link resources within the first time period after the successful transmission of the first transmission block as resources for sending the second transmission block. For example, the second transmission block may be sent through resources reserved after the maximum time gap allowed to be signaled by the SCI. For example, a transmission block sent through resources reserved after the maximum time gap allowed to be signaled by the SCI related to the first transmission block may be a second transmission block.

[0216] The first device 100 can send the SCI to the second device 200 via a physical sidelink control channel (PSCCH). For example, the SCI may include a preconfigured field. For example, the preconfigured field may include a time period associated with the first transport block or a time gap associated with the first transport block. For example, based on the SCI being an SCI associated with the first resource, the SCI may include the starting position of the frequency domain associated with the second resource, the frequency domain size of the second resource, the starting position of the frequency domain associated with the third resource, the frequency domain size of the third resource, information about the time gap between the first resource and the second resource, and information about the time gap between the second resource and the third resource. For example, the starting position of the frequency domain associated with the second resource and the starting position of the frequency domain associated with the third resource may be represented by a field of log2(X) bits. For example, X may be the total number of subchannels in a time slot. For example, based on the SCI being an SCI associated with an odd-numbered resource, the SCI may include information about the resource associated with the SCI and two resources following the resource associated with the SCI. For example, based on the SCI being an SCI associated with an even-numbered resource, the SCI may include information on the resource associated with the SCI, resources preceding the resource associated with the SCI, and resources following the resource associated with the SCI.

[0217] The above-described embodiments can be applied to various devices described below. For example, the processor 102 of the first device 100 can control the transceiver 106 to receive information related to CG resources. In addition, the processor 102 of the first device 100 can control the transceiver 106 to send a first transmission block through resources within a first time period based on the time period information about the CG resources. In addition, the processor 102 of the first device 100 can control the transceiver 106 to send a second transmission block through resources within a second time period based on the time period information about the CG resources.

[0218] Based on the embodiments of the present disclosure, a first device configured to perform wireless communication may be provided. For example, the first device may include: one or more memories storing instructions; one or more transceivers; and one or more processors connected to the one or more memories and the one or more transceivers. For example, the one or more processors may execute instructions to: receive information related to configured grant (CG) resources, wherein the information related to the CG resources includes time period information about the CG resources; based on the time period information about the CG resources, send a first transmission block through resources within a first time period; and based on the time period information about the CG resources, send a second transmission block through resources within a second time period. For example, the resources within the second time period cannot be selected as resources for retransmitting the first transmission block.

[0219] Based on the embodiments of the present disclosure, a device configured to control a first user equipment (UE) may be provided. For example, the device may include: one or more processors; and one or more memories, the one or more memories being operatively connected to the one or more processors and storing instructions. For example, the one or more processors may execute instructions to: receive information related to configured grant (CG) resources, wherein the information related to the CG resources includes time period information about the CG resources; based on the time period information about the CG resources, send a first transmission block through resources within a first time period; and based on the time period information about the CG resources, send a second transmission block through resources within a second time period. For example, the resources within the second time period cannot be selected as resources for retransmitting the first transmission block.

[0220] Based on the embodiments of the present disclosure, a non-transitory computer-readable storage medium storing instructions may be provided. For example, when the instructions are executed, a first device may: receive information related to a configured license (CG) resource, wherein the information related to the CG resource includes time period information about the CG resource; based on the time period information about the CG resource, send a first transmission block through resources within a first time period; and based on the time period information about the CG resource, send a second transmission block through resources within a second time period. For example, the resources within the second time period cannot be selected as resources for retransmitting the first transmission block.

[0221] Figure 17 A method for a second device to receive different transport blocks from a first device according to an embodiment of the present disclosure is shown. Figure 17 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0222] Reference Figure 17 , in step S1710, the second device 200 may receive the first transport block from the first device 100 through the resources within the first time period based on the time period information about the CG resources. For example, information related to the CG resources may be received. For example, the information related to the CG resources may include time period information about the CG resources. For example, based on the failure of transmission of the first transport block, resources for retransmitting the first transport block may be reserved. For example, the information related to the resources within the second time period cannot be signaled by the sub-link control information (SCI) related to the resources for retransmitting the first transport block. For example, the retransmission of the first transport block may be a retransmission based on HARQ feedback. For example, the resources for retransmitting the first transport block may be selected based on chain-based resource selection or block-based resource selection.

[0223] In step S1720, the second device 200 may receive a second transmission block from the first device 100 through resources within the second time period based on the time period information about the CG resources. For example, the second time period resources cannot be selected as resources for retransmitting the first transmission block. For example, resources within the first time period and resources within the second time period cannot be shared with each other. For example, based on the successful transmission of the first transmission block, the side link resources within the first time period after the successful transmission of the first transmission block cannot be selected as resources for sending the second transmission block. For example, the second transmission block may be sent through resources reserved after the maximum time gap allowed to be signaled by the SCI. For example, a transmission block sent through resources reserved after the maximum time gap allowed to be signaled by the SCI related to the first transmission block may be the second transmission block.

[0224] For example, the second device 200 may receive the SCI from the first device 100 via a physical sidelink control channel (PSCCH). For example, the SCI may include a preconfiguration field. For example, the preconfiguration field may include a time period associated with the first transport block or a time gap associated with the first transport block. For example, based on the SCI being an SCI associated with the first resource, the SCI may include the starting position of the frequency domain associated with the second resource, the frequency domain size of the second resource, the starting position of the frequency domain associated with the third resource, the frequency domain size of the third resource, information about the time gap between the first resource and the second resource, or information about the time gap between the second resource and the third resource. For example, the starting position of the frequency domain associated with the second resource and the starting position of the frequency domain associated with the third resource may be represented by a field of log2(X) bits. For example, X may be the total number of subchannels in a time slot. For example, based on the SCI being an SCI associated with an odd-numbered resource, the SCI may include information about the resource associated with the SCI and two resources following the resource associated with the SCI. For example, based on the SCI being an SCI associated with an even-numbered resource, the SCI may include information on the resource associated with the SCI, resources preceding the resource associated with the SCI, and resources following the resource associated with the SCI.

[0225] The above embodiments can be applied to various devices described below. For example, the processor 202 of the second device 200 can control the transceiver 206 to receive a first transmission block from the first device 100 using resources within a first time period based on the time period information for the CG resources. In addition, the processor 202 of the second device 200 can control the transceiver 206 to receive a second transmission block from the first device 100 using resources within a second time period based on the time period information for the CG resources.

[0226] Based on the embodiments of the present disclosure, a second device configured to perform wireless communication may be provided. For example, the second device may include: one or more memories storing instructions; one or more transceivers; and one or more processors connected to the one or more memories and the one or more transceivers. For example, the one or more processors may execute instructions to: receive a first transmission block from a first device through resources in a first time period based on time period information about configured grant (CG) resources; and receive a second transmission block from the first device through resources in a second time period based on time period information about the CG resources. For example, information related to CG resources is received. For example, the information related to CG resources may include time period information about CG resources. For example, resources within the second time period cannot be selected as resources for retransmitting the first transmission block.

[0227] Hereinafter, devices to which various embodiments of the present disclosure can be applied will be described.

[0228] 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).

[0229] Hereinafter, a more detailed description will be given 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.

[0230] Figure 18 A communication system (1) according to an embodiment of the present disclosure is shown.

[0231] Reference Figure 18 , 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 and 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 a head-mounted device (HMD), a head-up display (HUD) installed in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance device, a digital signage, a vehicle, a robot, etc. Handheld devices may include smartphones, 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.

[0232] Here, 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, narrowband IoT for low-power communication. In this case, for example, NB-IoT technology may be an example of low-power wide area network (LPWAN) technology and may be implemented as standards such as LTE Cat NB1 and / or LTE Cat NB2, without being 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 by various names, including enhanced machine type communication (eMTC). For example, LTE-M technology may be implemented as at least any one 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, without being 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, ZigBee technology can generate a personal area network (PAN) related to low / low-power digital communication based on various standards including IEEE 802.15.4, and can be referred to by various names.

[0233] Wireless devices 100a to 100f can be connected to a network 300 via a BS 200. AI technology can be applied to wireless devices 100a to 100f, and wireless devices 100a to 100f can be connected to an AI server 400 via the network 300. The network 300 can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although wireless devices 100a to 100f can communicate with each other via the BS 200 / network 300, wireless devices 100a to 100f can perform direct communication (e.g., sidelink communication) with each other without going through the BS / network. For example, vehicles 100b-1 and 100b-2 can perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0234] Wireless communication / connection 150a, 150b, or 150c can be established between wireless devices 100a to 100f / BS 200 or BS 200 / BS 200. Here, the wireless communication / connection can be established via 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 via wireless communication / connection 150a and 150b. For example, wireless communication / connection 150a and 150b can send / receive signals via various physical channels. To this end, various configuration information configuration processes for transmitting / 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.

[0235] Figure 19 A wireless device according to an embodiment of the present disclosure is shown.

[0236] Reference Figure 19 , the first wireless device (100) and the second wireless device (200) can transmit radio signals through various RATs (e.g., LTE and NR). Herein, {the first wireless device (100) and the second wireless device (200)} may correspond to Figure 18 {wireless device (100x) and BS (200)} and / or {wireless device (100x) and wireless device (100x)} in.

[0237] 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 processor(s) 102 may control the memory(s) 104 and / or the transceiver(s) 106, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed herein. For example, the processor(s) 102 may process information in the memory(s) 104 to generate first information / signals, and then transmit a radio signal including the first information / signals through the transceiver(s) 106. The processor(s) 102 may receive a radio signal including second information / signals through the transceiver 106, and then store information obtained by processing the second information / signals in the memory(s) 104. The memory(s) 104 may be connected to the processor(s) 102 and may store various information related to the operation of the processor(s) 102. For example, the memory(s) 104 may store software code including instructions for executing part or all of the processing controlled by the processor(s) 102 or for executing the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed in this document. Here, the processor(s) 102 and the memory(s) 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver(s) 106 may be connected to the processor(s) 102 and transmit and / or receive radio signals via the antenna(s) 108. Each transceiver 106 may include a transmitter and / or a receiver. The transceiver(s) 106 may be used interchangeably with the radio frequency (RF) unit(s). In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0238] 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 processor(s) 202 may control the memory(s) 204 and / or the transceiver(s) 206, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed herein. For example, the processor(s) 202 may process information in the memory(s) 204 to generate third information / signals, and then transmit a radio signal including the third information / signals through the transceiver(s) 206. The processor(s) 202 may receive a radio signal including fourth information / signals through the transceiver(s) 106, and then store information obtained by processing the fourth information / signals in the memory(s) 204. The memory(s) 204 may be connected to the processor(s) 202 and may store various information related to the operation of the processor(s) 202. For example, the memory(s) 204 may store software code including instructions for executing part or all of the processing controlled by the processor(s) 202 or for executing the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed in this document. Here, the processor(s) 202 and the memory(s) 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver(s) 206 may be connected to the processor(s) 202 and transmit and / or receive radio signals via the antenna(s) 208. Each transceiver 206 may include a transmitter and / or a receiver. The transceiver(s) 206 may be used interchangeably with the RF unit(s). In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0239] The hardware elements of the wireless devices 100 and 200 will be described in more detail below. 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 descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed herein. One or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed herein. One or more processors 102 and 202 may generate a signal (e.g., a baseband signal) including a PDU, SDU, message, control information, data, or information according to the description, functions, procedures, proposals, methods, and / or operational procedures disclosed in this document, and provide the generated signal to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive a signal (e.g., a baseband signal) from one or more transceivers 106 and 206, and obtain the PDU, SDU, message, control information, data, or information according to the description, functions, procedures, proposals, methods, and / or operational procedures disclosed in this document.

[0240] 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 codes, commands and / or command sets.

[0241] One or more memories 104 and 204 can be connected to one or more processors 102 and 202 and can store various types of data, signals, messages, information, programs, codes, instructions, and / or commands. One or more memories 104 and 204 can 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 can be located internally and / or externally to one or more processors 102 and 202. One or more memories 104 and 204 can be connected to one or more processors 102 and 202 via various technologies such as wired or wireless connections.

[0242] One or more transceivers 106 and 206 may transmit user data, control information, and / or radio signals / channels described in the methods and / or operational flows 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 described in the descriptions, functions, processes, proposals, methods, and / or operational flows 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 transmit and receive radio signals. For example, one or more processors 102 and 202 may control the one or more transceivers 106 and 206 to transmit user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may control the one or more transceivers 106 and 206 to 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 transmit and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operational 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 so as to process the 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 of the transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0243] Figure 20 A signal processing circuit for transmitting signals according to an embodiment of the present disclosure is shown.

[0244] Reference Figure 20 , 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). Figure 20 operations / functions, not limited to Figure 19 The processor (102, 202) and / or transceiver (106, 206) of Figure 19 The processor (102, 202) and / or transceiver (106, 206) are implemented Figure 20 For example, you can Figure 19 Alternatively, the processor (102, 202) can implement blocks 1010 to 1060. Figure 19 The processor (102, 202) implements blocks 1010 to 1050 and can be Figure 19 The transceiver (106, 206) is used to implement block 1060.

[0245] Can be passed Figure 20 The signal processing circuit (1000) converts the codeword into a radio signal. In this article, 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 via various physical channels (e.g., PUSCH and PDSCH).

[0246] 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) on the complex modulation symbols. Alternatively, the precoder 1040 may perform precoding without performing transform precoding.

[0247] The resource mapper 1050 can 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 can generate a radio signal from the mapped modulation symbols, and the generated radio signal can 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 upconverter.

[0248] Can be used with Figure 20 The signal processing process for a signal received in a wireless device is configured in a manner opposite to the signal processing process (1010 to 1060) of FIG. Figure 19 100 and 200) can receive a radio signal from the outside through an antenna port / transceiver. The received radio signal can be converted into a baseband signal by a signal restorer. To this end, the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a fast Fourier transform (FFT) module. Next, the baseband signal can be restored to a codeword through a resource demapping process, a post-coding process, a demodulation processor, and a descrambling process. The codeword can be restored to the original information block by decoding. Therefore, a signal processing circuit (not shown) for receiving a signal may include a signal restorer, a resource demapper, a post-coding process, a demodulator, a descrambler, and a decoder.

[0249] Figure 21 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 Figure 18 ).

[0250] Reference Figure 21 , the wireless devices (100 and 200) may correspond to Figure 19 The wireless devices (100 and 200) may be configured by various elements, components, units / portions and / or modules. For example, each of the wireless devices (100 and 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 Figure 19 One or more processors (102 and 202) and / or one or more memories (104 and 204). For example, the transceiver(s) (114) may include Figure 19The control unit (120) is electrically connected to the communication unit (110), the storage unit (130), and the additional components (140), and controls the overall operation of the wireless device. For example, the control unit (120) can control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the storage unit (130). For example, the control unit (120) can transmit information stored in the storage unit (130) to the outside (e.g., other communication devices) via the communication unit (110) through a wireless / wired interface, or store information received from the outside (e.g., other communication devices) via the communication unit (110) through a wireless / wired interface in the storage unit (130).

[0251] 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 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 ( Figure 18 100a), vehicles ( Figure 18 100b-1 and 100b-2), XR devices ( Figure 18 100c), handheld device ( Figure 18 100d), household appliances ( Figure 18 100e), IoT devices ( Figure 18 100f), digital broadcasting terminal, hologram device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate / environmental device, AI server / device ( Figure 18 400), BS( Figure 18 200), network nodes, etc. Depending on the use case / service, the wireless device can be used in a mobile or fixed place.

[0252] exist Figure 21In the wireless device (100 and 200), the various elements, components, units / parts and / or modules in the wireless device (100 and 200) can all be connected to each other through a wired interface, or at least part of them can be connected wirelessly through the communication unit (110). For example, in each of the wireless devices (100 and 200), the control unit (120) and the communication unit (110) can be connected through a wired interface, and the control unit (120) and the first unit (e.g., 130 and 140) can be connected wirelessly through the communication unit (110). Each element, component, unit / part and / or module in the wireless device (100 and 200) can also include one or more elements. For example, the control unit (120) can be constructed by a collection of one or more processors. As an example, the control unit (120) can be constructed by a collection of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing unit and a memory control processor. As another example, the storage unit ( 130 ) may be constructed by random access memory (RAM), dynamic RAM (DRAM), read only memory (ROM), flash memory, volatile memory, nonvolatile memory, and / or a combination thereof.

[0253] Hereinafter, the implementation will be described in detail with reference to the accompanying drawings. Figure 21 .

[0254] Figure 22 A handheld device according to an embodiment of the present disclosure is shown. The handheld device may include a smartphone, a smartpad, a wearable device (e.g., a smartwatch 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).

[0255] Reference Figure 22 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 Figure 21 Frame 110 to 130 / 140.

[0256] The communication unit 110 can send and receive signals (e.g., data signals and control signals) to and from other wireless devices or a base station. The control unit 120 can perform various operations by controlling the components of the handheld device 100. The control unit 120 may include an application processor (AP). The storage unit 130 can store data / parameters / programs / codes / commands required to operate the handheld device 100. The storage unit 130 can store input / output data / information. The power supply unit 140a can supply power to the handheld device 100 and may include wired / wireless charging circuits, a battery, etc. The interface unit 140b can support connection between the handheld device 100 and other external devices. The interface unit 140b may include various ports for connecting to external devices (e.g., an audio I / O port and a video I / O port). The I / O unit 140c can input or output user-input video information / signals, audio information / signals, data, and / or information. The I / O unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and / or a haptic module.

[0257] 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 transmit the converted radio signals directly 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.

[0258] Figure 23 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.

[0259] Reference Figure 23 , 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 Figure 21 Box 110 / 130 / 140.

[0260] The communication unit 110 can send and receive signals (e.g., data signals and control signals) to and from external devices such as other vehicles, base stations (e.g., gNBs and roadside units), and servers. The control unit 120 can perform various operations by controlling components of the vehicle or autonomous vehicle 100. The control unit 120 may include an electronic control unit (ECU). The drive unit 140a can 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 system, etc. The power supply unit 140b can supply power to the vehicle or autonomous vehicle 100 and may include a wired / wireless charging circuit, a battery, etc. The sensor unit 140c can obtain vehicle status, external environment information, user information, etc. The sensor unit 140 c 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 location module, a vehicle forward / backward 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 140 d may implement a technology for maintaining a lane in which the vehicle is traveling, a technology for automatically adjusting the speed (e.g., adaptive cruise control), a technology for autonomously driving along a determined path, a technology for driving by automatically setting a path with a destination set, etc.

[0261] For example, the communication unit 110 can receive map data, traffic information data, etc. from an external server. The autonomous driving unit 140d can generate an autonomous driving path and driving plan based on the acquired data. The control unit 120 can control the drive unit 140a so that the vehicle or autonomous driving vehicle 100 can move along the autonomous driving path according to the driving plan (e.g., speed / direction control). During autonomous driving, the communication unit 110 can aperiodically / periodically acquire the latest traffic information data from the external server and acquire surrounding traffic information data from neighboring vehicles. During autonomous driving, the sensor unit 140c can acquire vehicle status and / or surrounding environment information. The autonomous driving unit 140d can update the autonomous driving path and driving plan based on the newly acquired data / information. The communication unit 110 can transmit information about the vehicle's location, autonomous driving path, and / or driving plan to the external server. The external server can use AI technology, etc. based on the information collected from the vehicle or autonomous driving vehicle to predict traffic information data and provide the predicted traffic information data to the vehicle or autonomous driving vehicle.

[0262] 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 the following steps: obtaining information related to the start of a sensing window; Trigger resource selection in a time slot; determining a selection window based on the time slot and a remaining packet delay budget PDB; determining the sensing window based on the information related to a start of the sensing window and a processing time; determining a first secondary link resource within the selection window based on sensing within the sensing window; determining a second secondary link resource in a subsequent time period of the time period of the first secondary link resource; as well as within the time period of the first secondary link resource, transmitting first secondary link information to a second device based on the first secondary link resource; The first device is not allowed to retransmit the first sub-link information within the subsequent time period.

2. The method according to claim 1, further comprising the steps of: Get at least one time period value configured for a resource pool.

3. The method according to claim 2, wherein: A period value is selected from among the at least one period value configured for the resource pool.

4. The method according to claim 3, wherein: The period value signaled by the first device is greater than the remaining PDB.

5. The method according to claim 4, further comprising the steps of: Secondary link control information SCI is transmitted to the second device through a physical secondary link control channel PSCCH, where the SCI includes information related to the time period value.

6. The method according to claim 1, further comprising the steps of: Transmission of second secondary link information is performed based on the second secondary link resource in the subsequent period.

7. The method according to claim 6, wherein: The first device is not allowed to perform the transmission of the second sublink information within the time period.

8. The method according to claim 1, wherein The first device is not allowed to select resources for the retransmission of the first sublink information within the subsequent time period.

9. The method according to claim 1, wherein Resources used to transmit the same sub-link information are not shared between different time periods.

10. The method according to claim 1, wherein The end of the selection window is less than or equal to the remaining PDB.

11. A first device configured to perform wireless communication, the first device comprising: at least one transceiver; at least one processor; as well as at least one memory connected to the at least one processor and storing instructions that, upon being executed, cause the first device to perform operations comprising: obtaining information related to the start of a sensing window; Trigger resource selection in a time slot; determining a selection window based on the time slot and a remaining packet delay budget PDB; determining the sensing window based on the information related to a start of the sensing window and a processing time; determining a first secondary link resource within the selection window based on sensing within the sensing window; determining a second secondary link resource within a subsequent period of the period of the first secondary link resource; and within the time period of the first secondary link resource, transmitting first secondary link information to a second device based on the first secondary link resource; The first device is not allowed to retransmit the first sub-link information within the subsequent time period.

12. The first device according to claim 11, wherein A time period value is selected from among at least one time period value configured for the resource pool.

13. The first device according to claim 12, wherein: The period value signaled by the first device is greater than the remaining PDB.

14. A device configured to control a first user equipment (UE), the device comprising: at least one processor; as well as At least one memory, connected to the at least one processor and storing instructions, wherein the instructions, upon being executed, cause the first UE to perform operations, the operations comprising: obtaining information related to the start of a sensing window; Trigger resource selection in a time slot; determining a selection window based on the time slot and a remaining packet delay budget PDB; determining the sensing window based on the information related to a start of the sensing window and a processing time; determining a first secondary link resource within the selection window based on sensing within the sensing window; determining a second secondary link resource within a subsequent period of the period of the first secondary link resource; and within the time period of the first secondary link resource, transmitting first secondary link information to a second UE based on the first secondary link resource; The first UE is not allowed to retransmit the first sublink information within the subsequent time period.

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