Method and apparatus for reselecting sidelink resources in nr v2x

Abstract

According to one embodiment of the disclosure, a method of a first device performing sidelink communication with a second device is provided. The method includes determining a first resource for a first sidelink transmission, receiving, from a third device, SCI including information related to a second resource for a second sidelink transmission, determining to reselect the first resource based on the first resource overlapping the second resource and a relationship between a first priority value of the first sidelink transmission and a second priority value of the second sidelink transmission satisfying a preset condition, and transmitting, to the second device, a first PSCCH related to the first sidelink transmission or a first PSSCH related to the first PSCCH based on a third resource determined by reselecting the first resource, wherein the preset condition can include a condition that the first priority value is greater than the second priority value.

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 technologies (RATs). 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 of radio access technologies that take into account enhanced mobile broadband communication, massive MTC, and ultra-reliable low latency communication (URLLC) can be referred to as new RATs (radio access technologies) or NRs (new radios).

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

[0006] Regarding V2X communication, when discussing 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 the CAM can be less than 100ms. For example, a UE can generate a DENM and transmit it to another UE in unexpected situations such as vehicle breakdown or an 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 platooning, advanced driving, extended sensors, and remote driving.

[0009] For example, based on vehicle platooning, vehicles can dynamically form groups to move together. For example, to perform platooning operations based on vehicle platooning, vehicles in the group can receive periodic data from the lead vehicle. For example, the 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, remote driving can enable a person or remote vehicle in a dangerous environment to operate or control a remote vehicle, using a remote driver or V2X application. 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 be achieved by accessing a cloud-based backend service platform.

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

[0016] The present disclosure provides a method for reselecting secondary link resources in NR V2X and an apparatus (or UE) for performing the method.

[0017] Technical Solution

[0018] Based on an embodiment of the present disclosure, a method for performing sub-link (SL) communication with a second device by a first device may be provided. The method may include the following steps: determining a first resource for first sub-link transmission; receiving sub-link control information (SCI) including information related to a second resource for second sub-link transmission from a third device; determining to reselect the first resource based on the overlap of the first resource and the second resource and the relationship between the first priority value of the first sub-link transmission and the second priority value of the second sub-link transmission meeting a pre-configured condition; and based on the third resource determined by reselecting the first resource, sending a first physical sub-link control channel (PSCCH) related to the first sub-link transmission or a first PSSCH related to the first PSCCH to the second device, wherein the pre-configured condition includes a condition that the first priority value is greater than the second priority value.

[0019] Based on an embodiment of the present disclosure, a first device configured to perform side-link (SL) communication with a second device may be provided. The first device may include: at least one memory storing instructions; at least one transceiver; and at least one processor connected to the at least one memory and the at least one transceiver. The at least one processor may execute instructions to: determine a first resource for a first side-link transmission; receive side-link control information (SCI) including information related to a second resource for a second side-link transmission from a third device; determine to reselect the first resource based on the overlap of the first resource and the second resource and the relationship between the first priority value of the first side-link transmission and the second priority value of the second side-link transmission meeting a preconfigured condition; and based on the third resource determined by reselecting the first resource, send a first physical side-link control channel (PSCCH) related to the first side-link transmission or a first PSSCH related to the first PSCCH to the second device, wherein the preconfigured condition includes a condition that the first priority value is greater than the second priority value.

[0020] Based on the embodiments of the present disclosure, a device (or chip (set)) configured to control a first user equipment (UE) to perform sidelink (SL) communication with a second UE may be provided. The device may include: at least one processor; and at least one memory connected to the at least one processor and storing instructions. The at least one processor may execute instructions to: determine a first resource for a first sidelink transmission; receive sidelink control information (SCI) including information related to a second resource for a second sidelink transmission from a third UE; determine to reselect the first resource based on the overlap of the first resource and the second resource and the relationship between the first priority value of the first sidelink transmission and the second priority value of the second sidelink transmission meeting a preconfigured condition; and based on the third resource determined by reselecting the first resource, send a first physical sidelink control channel (PSCCH) related to the first sidelink transmission or a first PSSCH related to the first PSCCH to the second UE, wherein the preconfigured condition includes a condition that the first priority value is greater than the second priority value.

[0021] Based on an embodiment of the present disclosure, a non-transitory computer-readable storage medium storing instructions may be provided. When the instructions are executed, the first device may: determine a first resource for a first sub-link transmission; receive sub-link control information (SCI) including information related to a second resource for a second sub-link transmission from a third device; determine to reselect the first resource based on the overlap of the first resource and the second resource and the relationship between the first priority value of the first sub-link transmission and the second priority value of the second sub-link transmission meeting a pre-configured condition; and based on the third resource determined by reselecting the first resource, send a first physical sub-link control channel (PSCCH) related to the first sub-link transmission or a first PSSCH related to the first PSCCH to a second device, wherein the pre-configured condition includes a condition that the first priority value is greater than the second priority value.

[0022] Based on an embodiment of the present disclosure, a method for performing sub-link (SL) communication with a first device by a second device may be provided. The method may include the following steps: based on a second resource determined by the first device by reselecting a first resource for first sub-link transmission, receiving a first PSCCH related to the first sub-link transmission or a first PSSCH related to the first PSCCH from the first device, wherein the first device receives an SCI including information related to a third resource for second sub-link transmission from a third device, wherein, based on the overlap of the first resource and the third resource and the relationship between the first priority value of the first sub-link transmission and the second priority value of the second sub-link transmission satisfying a preconfigured condition, the first device determines to reselect the first resource, and wherein the preconfigured condition includes a condition that the first priority value is greater than the second priority value.

[0023] Based on an embodiment of the present disclosure, a second device configured to perform side-link (SL) communication with a first device may be provided. The second device may include: at least one memory storing instructions; at least one transceiver; and at least one processor connected to the at least one memory and the at least one transceiver. The at least one processor may execute instructions to: based on the second resource determined by the first device by reselecting the first resource for the first side-link transmission, receive a first PSCCH related to the first side-link transmission or a first PSSCH related to the first PSCCH from the first device, wherein the first device receives an SCI including information related to the third resource for the second side-link transmission from a third device, wherein, based on the overlap of the first resource and the third resource and the relationship between the first priority value of the first side-link transmission and the second priority value of the second side-link transmission satisfying a preconfigured condition, the first device determines to reselect the first resource, and wherein the preconfigured condition includes a condition that the first priority value is greater than the second priority value.

[0024] Effects of the present disclosure

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

[0026] Based on the present disclosure, the frequency of resource preemption can be controlled for each priority level of the transmitting UE, thereby not only protecting relatively high priority packet transmissions but also maintaining the probability of transmission resource conflicts between different UEs at an appropriate level. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1This diagram is used to describe NR-based V2X communication compared to V2X communication based on RAT used before NR.

[0028] Figure 2 The structure of the NR system according to an embodiment of the present disclosure is shown.

[0029] Figure 3 The functional division between NG-RAN and 5GC according to an embodiment of the present disclosure is shown.

[0030] Figure 4a and Figure 4b A radio protocol architecture according to an embodiment of the present disclosure is shown.

[0031] Figure 5 The structure of the NR system according to an embodiment of the present disclosure is shown.

[0032] Figure 6 The structure of the time slot of the NR frame according to an embodiment of the present disclosure is shown.

[0033] Figure 7 An example of a BWP according to an embodiment of the present disclosure is shown.

[0034] Figure 8a and Figure 8b A radio protocol architecture for SL communication based on an embodiment of the present disclosure is shown.

[0035] Figure 9 A UE performing V2X or SL communication according to an embodiment of the present disclosure is shown.

[0036] Figure 10a and Figure 10b The present invention illustrates a process in which a UE performs V2X or SL communication based on a transmission mode according to an embodiment of the present disclosure.

[0037] Figures 11a to 11c Three broadcast types based on embodiments of the present disclosure are shown.

[0038] Figure 12a and Figure 12b An example of chain-based resource reservation is shown.

[0039] Figure 13 An example of block-based resource reservation is shown.

[0040] Figure 14 A method for determining resources for secondary link transmission by a first device and a second device according to an embodiment of the present disclosure is shown.

[0041] Figure 15 A method for a first device to perform secondary link communication according to an embodiment of the present disclosure is shown.

[0042] Figure 16 The operation of the first device according to the embodiment of the present disclosure is shown.

[0043] Figure 17 The operation of the second device according to the embodiment of the present disclosure is shown.

[0044] Figure 18 A communication system 1 according to an embodiment of the present disclosure is shown.

[0045] Figure 19 A wireless device according to an embodiment of the present disclosure is shown.

[0046] Figure 20 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown.

[0047] Figure 21 A wireless device according to an embodiment of the present disclosure is shown.

[0048] Figure 22 A handheld device according to an embodiment of the present disclosure is shown.

[0049] Figure 23 A vehicle or autonomous vehicle according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0050] In this specification, "A or B" may mean "only A", "only B", or "both A and B". In other words, in this specification, "A or B" may be interpreted as "A and / or B". For example, in this specification, "A, B or C" may mean "only A", "only B", "only C", or "any combination of A, B, and C".

[0051] As used in this specification, 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".

[0052] In this specification, “at least one of A and B” may mean “only A”, “only B”, or “both A and B”. In addition, in this specification, the expression “at least one of A or B” or “at least one of A and / or B” may be interpreted as “at least one of A and B”.

[0053] Also, in the present specification, "at least one of A, B and C" can mean "only A", "only B", "only C", or "any combination of A, B and C". Also, "at least one of A, B or C" or "at least one of A, B and / or C" can mean "at least one of A, B and C".

[0054] Also, the bracket used in the present specification can mean "for example". Specifically, when indicated as "control information (PDCCH)", this can mean that "PDCCH" is proposed as an example of "control information". In other words, the "control information" of the present specification is not limited to "PDCCH", and "PDDCH" can be proposed as an example of "control information". Specifically, when indicated as "control information (i.e., PDCCH)", this can also mean that "PDCCH" is proposed as an example of "control information".

[0055] The technical features described in the present specification respectively described in a set of drawings can be respectively implemented, or can be simultaneously implemented.

[0056] The technology 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. The CDMA can be implemented by such a radio technology as universal terrestrial radio access (UTRA) or CDMA-2000. The TDMA can be implemented by such a radio technology as global system for mobile communications (GSM) / general packet radio service (GPRS) / enhanced data rates for GSM evolution (EDGE). The OFDMA can be implemented by such a radio technology 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 evolution of IEEE 802.16e, and provides backward compatibility with an IEEE 802.16e-based system. The UTRA is a part of a universal mobile telecommunication system (UMTS). 3rd generation partnership project (3GPP) long term evolution (LTE) is a part of an evolved UMTS (E-UMTS) using the E-UTRA. The 3GPP LTE uses the OFDMA in downlink and uses the SC-FDMA in uplink. LTE-higher advanced (LTE-A) is an evolution of the LTE.

[0057] 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.

[0058] 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.

[0059] Figure 2 The structure of the NR system according to an embodiment of the present disclosure is shown. Figure 2 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0060] Reference Figure 2 , the next generation radio access network (NG-RAN) may include a BS 20 that provides user plane and control plane protocol terminations 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.

[0061] 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.

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

[0063] Reference Figure 3The 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.

[0064] 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, located at 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.

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

[0066] Reference Figure 4a and Figure 4b 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 by how data is transmitted over the radio interface and the characteristics of the data transmitted over the radio interface.

[0067] 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.

[0068] 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.

[0069] 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).

[0070] The Radio Resource Control (RRC) layer is defined only in the control plane. The RRC layer controls physical, transport, and logical channels related to 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, RLC layer, and PDCP layer) to transmit data between the UE and the network.

[0071] The functions of the Packet Data Convergence Protocol (PDCP) in the user plane include transmission of user data, header compression and encryption. The functions of the Packet Data Convergence Protocol (PDCP) in the control plane include transmission and encryption / integrity protection of control plane data.

[0072] The Service Data Adaptation Protocol (SDAP) layer is defined only in the user plane. The SDAP layer performs mapping between Quality of Service (QoS) flows and Data Radio Bearers (DRBs) and QoS Flow ID (QFI) marking in both DL and UL packets.

[0073] 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, and DRBs are used as a path for transmitting user data in the user plane.

[0074] 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.

[0075] The downlink transport channels for sending (or transmitting) data from the network to the UE include the broadcast channel (BCH) for sending system information and the downlink shared channel (SCH) for sending other user traffic or control messages. Traffic or control messages for downlink multicast or broadcast services can be sent via the downlink SCH or can be sent via a separate downlink multicast channel (MCH). In addition, the uplink transport channels for sending (or transmitting) data from the UE to the network include the random access channel (RACH) for sending initial control messages and the uplink shared channel (SCH) for sending other user traffic or control messages.

[0076] Examples of logical channels belonging to a higher layer of a transport channel and mapped to a transport channel may include a broadcast control channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), a multicast control channel (MCCH), a multicast traffic channel (MTCH), etc.

[0077] A physical channel is configured from multiple OFDM symbols in the time domain and multiple subcarriers in the frequency domain. A subframe is configured from multiple OFDM symbols in the time domain. A resource block is configured from multiple subcarriers and multiple OFDM symbols in a resource allocation unit. 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) refers to the unit time for subframe transmission.

[0078] Figure 5 The structure of the NR system according to an embodiment of the present disclosure is shown. Figure 5 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0079] Reference Figure 5In NR, a radio frame can be used to perform uplink and downlink transmission. The length of a radio frame is 10 ms and can be defined as consisting of two half frames (HF). A half frame can include five 1 ms subframes (SF). A subframe (SF) can be divided into one or more slots, and the number of slots within a subframe can be determined according to a subcarrier spacing (SCS). Each slot can include 12 or 14 OFDM(A) symbols according to a cyclic prefix (CP).

[0080] In case of using normal CP, each slot can include 14 symbols. In case of using extended CP, each slot can include 12 symbols. Herein, a symbol can include an OFDM symbol (or CP-OFDM symbol) and a single carrier-FDMA (SC-FDMA) symbol (or discrete Fourier transform-spread-OFDM (DFT-s-OFDM) symbol).

[0081] The following Table 1 shown below indicates the number of slots (N slot symb ), the number of slots per frame (N frame,μ slot ), and the number of slots per subframe (N subframe,μ slot ) according to an SCS setting (μ) in case of employing normal CP.

[0082] [Table 1]

[0083] <![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

[0084] Table 2 shows an example of the number of symbols per slot, the number of slots per frame, and the number of slots per subframe according to an SCS in case of using extended CP.

[0085] [Table 2]

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

[0087] In the NR system, OFDM(A) numerologies (e.g., SCS, CP length, etc.) integrated between a plurality of cells of one UE can be differently configured. Accordingly, the (absolute time) duration (or interval) of a time resource (e.g., subframe, slot, or TTI) consisting of the same number of symbols (for simplicity, collectively referred to as a time unit (TU)) can be differently configured in the integrated cells.

[0088] In NR, multiple parameter sets or SCSs can be supported to support various 5G services. For example, with an SCS of 15kHz, a wide range of traditional cellular 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.

[0089] 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).

[0090] [Table 3]

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

[0092] As described above, the value of the frequency range in the NR system 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).

[0093] [Table 4]

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

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

[0096] Reference Figure 6 A 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.

[0097] A carrier includes multiple subcarriers in the frequency domain. A resource block (RB) can be defined as multiple consecutive subcarriers in the frequency domain (e.g., 12 subcarriers). A bandwidth part (BWP) can be defined as multiple consecutive (physical) resource blocks ((P)RBs) in the frequency domain, and a BWP can correspond to a parameter set (e.g., SCS, CP length, etc.). A carrier can include up to N BWPs (e.g., 5 BWPs). Data communication can be performed via 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.

[0098] 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.

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

[0100] A BWP may be a contiguous set of physical resource blocks (PRBs) within a given parameter set. A PRB may be selected from a contiguous set of common resource blocks (CRBs) for a given parameter set on a given carrier.

[0101] When bandwidth adaptation (BA) is used, the reception bandwidth and transmission bandwidth of the user equipment (UE) do not need to be as wide (or large) as the bandwidth of the cell, and the reception bandwidth and transmission bandwidth of the UE can be controlled (or adjusted). For example, the UE can receive information / configuration for bandwidth control (or adjustment) from the network / base station. In this case, bandwidth control (or adjustment) can be performed based on the received information / configuration. For example, bandwidth control (or adjustment) can include reducing / expanding the bandwidth, changing the position of the bandwidth, or changing the subcarrier spacing of the bandwidth.

[0102] For example, the bandwidth can be reduced during periods of low activity to save power. For example, the bandwidth can be relocated (or moved) from the frequency domain. For example, the bandwidth can be relocated (or moved) from the frequency domain to enhance scheduling flexibility. For example, the subcarrier spacing of the bandwidth can be changed. For example, the subcarrier spacing of the bandwidth can be changed to authorize different services. A subset of the total cell bandwidth of a cell can be referred to as a bandwidth part (BWP). BA can be performed when the base station / network configures a BWP for the UE and when the base station / network notifies the UE of the currently active BWP among the BWPs.

[0103] For example, the BWP can be one of an active BWP, an initial BWP, and / or a default BWP. For example, the UE cannot monitor downlink radio link quality in a DL BWP other than the active DL BWP within a primary cell (PCell). For example, the UE cannot receive PDCCH, PDSCH, or CSI-RS (except for RRM) from outside of the active DL BWP. For example, the UE cannot trigger a channel state information (CSI) report for an inactive DL BWP. For example, the UE cannot transmit PUCCH or PUSCH from outside of the inactive DL BWP. For example, in the case of downlink, the initial BWP can be given as a contiguous RB set for a RMSI CORESET (configured by PBCH). For example, in the case of uplink, the initial BWP can be given for a random access procedure by SIB. For example, the default BWP can be configured by a higher layer. For example, an initial value of the default BWP can be the initial DL BWP. For power saving, if the UE cannot detect DCI for a predetermined period of time, the UE can switch the active BWP of the UE to the default BWP.

[0104] In addition, a BWP can be defined for SL. The same SL BWP can be used for transmission and reception. For example, a transmitting UE can transmit an SL channel or SL signal within a specific BWP, and a receiving UE can receive an SL channel or SL signal within the same specific BWP. In a licensed carrier, the SL BWP can be defined separately from the Uu BWP, and the SL BWP can have separate configuration signaling from the Uu BWP. For example, the UE can receive configuration for the SL BWP from the base station / network. The SL BWP can be configured (in advance) for out-of-coverage NR V2X UEs and RRC_IDLE UEs. For a UE operating in an RRC_CONNECTED mode, at least one SL BWP can be activated within a carrier.

[0105] Figure 7 An example of a BWP according to an embodiment of the disclosure is illustrated. Figure 7 Embodiments of the disclosure can be combined with various embodiments of the disclosure. It is assumed that in Figure 7 In an embodiment of the disclosure, the number of BWPs is 3.

[0106] Referring to Figure 7 A common resource block (CRB) can be a carrier resource block numbered from one end of a carrier frequency band to the other end thereof. In addition, a PRB can be a resource block numbered within each BWP. Point A can indicate a common reference point of a resource block grid.

[0107] A BWP can be defined by point A, an offset (N start BWP ) with respect to point A, and a bandwidth (Nsize 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.

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

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

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

[0111] 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 for 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.

[0112] The physical sidelink broadcast channel (PSBCH) can be a (broadcast) channel for transmitting default (system) information, which the UE must first know before SL signal transmission / reception. For example, the default information can be information related to SLSS, duplex mode (DM), time division duplex (TDD) uplink / downlink (UL / DL) configuration, information related to resource pool, type of application related to SLSS, subframe offset, broadcast information, etc. For example, in order to evaluate PSBCH performance, in NR V2X, the payload size of PSBCH can be 56 bits, including a 24-bit CRC.

[0113] S-PSS, S-SSS and PSBCH can be included in a block format that supports periodic transmission (e.g., SL synchronization signal (SS) / PSBCH block, hereinafter, 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 (RBs). For example, the PSBCH can exist across 11 RBs. In addition, the frequency position of the S-SSB can be (pre-) configured. Therefore, the UE does not have to perform hypothesis detection at the frequency to discover the S-SSB in the carrier.

[0114] 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.

[0115] 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 and 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 wireless device 100, and UE 2 may be second wireless device 200.

[0116] For example, UE 1 may select a resource unit corresponding to a specific resource from a resource pool representing a set of resources. UE 1 may also transmit an SL signal using this resource unit. For example, a resource pool in which UE 1 can transmit a signal may be configured for UE 2, which is a receiving UE, and UE 2 may detect UE 1's signal in this resource pool.

[0117] 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.

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

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

[0120] Figure 10a and Figure 10bThe present invention illustrates a process in which a UE performs V2X or SL communication based on a transmission mode according to an embodiment of the present disclosure. Figure 10a and Figure 10b 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.

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

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

[0123] Reference Figure 10a In LTE transmission mode 1, LTE transmission mode 3, or NR resource allocation mode 1, the BS may schedule SL resources to be used by the UE for SL transmission. For example, the BS may perform resource scheduling for UE 1 through 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).

[0124] Reference Figure 10b, in LTE transmission mode 2, LTE transmission mode 4 or NR resource allocation mode 2, the UE can determine the SL transmission resources within the SL resources configured by the BS / network or the pre-configured SL resources. For example, the configured SL resources or the pre-configured SL resources may be a resource pool. For example, the UE may autonomously select or schedule resources for SL transmission. For example, the UE may perform SL communication by autonomously selecting resources in the configured resource pool. For example, the UE may autonomously select resources within a selection window by performing a sensing and resource (re)selection process. For example, sensing may be performed in units of subchannels. In addition, UE 1, which has autonomously selected resources within the resource pool, may send SCI to UE 2 via PSCCH, and thereafter may send data based on the SCI to UE 2 via PSSCH.

[0125] Figures 11a to 11c Three broadcast types based on embodiments of the present disclosure are shown. Figures 11a to 11c The embodiments of can be combined with various embodiments of the present disclosure. Specifically, Figure 11a shows a broadcast type SL communication, Figure 11b shows a unicast type SL communication, and Figure 11c Multicast type SL communication is shown. In the case of unicast type SL communication, the UE can perform one-to-one communication with another UE. In the case of multicast type SL transmission, the UE can perform SL communication with one or more UEs in the group to which the UE belongs. In various embodiments of the present disclosure, SL groupcast communication can be replaced by SL multicast communication, SL one-to-many communication, etc.

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

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

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

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

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

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

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

[0133] [Table 5]

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

[0135] Referring to Table 5, for example, a service A or a logical channel A related to a minimum priority value can have a highest priority. For example, a service C or a logical channel C related to a maximum priority value can have a lowest priority.

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

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

[0138] Also, in the disclosure, for example, a transmitting UE (TX UE) can be a UE that transmits data to a (target) receiving UE (RX UE). For example, the TX UE can be a UE that performs PSCCH transmission and / or PSSCH transmission. Also / Or, for example, the TX UE can be a UE that transmits an SL CSI-RS and / or an SL CSI report request indicator to the (target) RX UE. Also / Or, for example, the TX UE can be a UE that transmits a (control) channel (e.g., a PSCCH, a PSSCH, etc.) and / or a reference signal (e.g., a DM-RS, a CSI-RS, etc.) on the (control) channel to be used for SL RLM operation and / or SL RFL operation of the (target) RX UE.

[0139] In addition, in the present disclosure, for example, a receiving UE (RX UE) may be a UE that transmits SL HARQ feedback to a transmitting UE (TX UE) based on whether decoding of data received from the TX UE is successful and / or whether detection / decoding of a PSCCH (related to PSSCH scheduling) transmitted by the TX UE is successful. And / or, for example, the RX UE may be a UE that performs SL CSI transmission to the TX UE based on an SLCSI-RS and / or an SL CSI report request indicator received from the TX UE. And / or, for example, the RX UE may be a UE that transmits an SL (L1) reference signal received power (RSRP) measurement value measured based on an SL (L1) RSRP report request indicator and / or a (predefined) reference signal received from the TX UE to the TX UE. And / or, for example, the RX UE may be a UE that transmits data of the RX UE to the TX UE. And / or, for example, the RX UE may be a UE that performs a SL RLM operation and / or a SL RLF operation based on a (pre-configured) (control) channel and / or a reference signal on a (control) channel received from the TX UE.

[0140] In addition, in the present disclosure, for example, when the RX UE sends SL HARQ feedback information for the PSSCH and / or PSCCH received from the TX UE, the following options or some of the following options may be considered. Herein, for example, the following options or some of the following options may be restrictedly applied only when the RX UE successfully decodes / detects the PSCCH that schedules the PSSCH.

[0141] (1) Multicast HARQ feedback option 1: NACK information can be sent to the TX UE only if the RX UE cannot decode / receive the PSSCH received from the TX UE.

[0142] (2) Multicast HARQ feedback option 2: If the RX UE successfully decodes / receives the PSSCH received from the TX UE, ACK information may be sent to the TX UE, and if the RX UE fails to decode / receive the PSSCH, NACK information may be sent to the TX UE.

[0143] 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. Herein, 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.

[0144] -PSSCH (and / or PSCCH) related resource allocation information (e.g., location / number of time / frequency resources, resource reservation information (e.g., time period))

[0145] -SLCSI report request indicator or SL (L1) reference signal received power (RSRP) (and / or SL (L1) reference signal received quality (RSRQ) and / or SL (L1) received signal strength indicator (RSSI)) report request indicator

[0146] -SL CSI transmission indicator (on PSSCH) (or SL (L1) RSRP (and / or SL (L1) RSRQ and / or SL (L1) RSSI) information transmission indicator)

[0147] - Modulation and Coding Scheme (MCS) information

[0148] -TX power information

[0149] - L1 destination ID information and / or L1 source ID information

[0150] -SL HARQ process ID information

[0151] -New Data Indicator (NDI) information

[0152] - Redundancy Version (RV) information

[0153] -QoS information (for example, priority information) (related to the transmitted traffic / packet)

[0154] - Information on the number of antenna ports used for (transmitting) SL CSI-RS or SL CSI-RS transmission indicator

[0155] - Target RX UE location (or distance range) information or TX UE location information (for which SL HARQ feedback is requested)

[0156] Reference signal (e.g., DM-RS, etc.) information related to decoding (and / or channel estimation) of data transmitted via the PSSCH. For example, information related to the (time-frequency) mapping resource pattern of the DM-RS, rank information, antenna port index information, information about the number of antenna ports, etc.

[0157] Furthermore, 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 with the SCI and / or the first SCI and / or the second SCI. Furthermore, / or alternatively, the SCI can be replaced / replaced with the PSCCH and / or the first SCI and / or the second SCI. Furthermore, / or, for example, since the TX UE can transmit the second SCI to the RX UE via the PSSCH, the PSSCH can be replaced / replaced with the second SCI.

[0158] 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 on the PSSCH and transmitted together with the data.

[0159] In addition, in the present disclosure, for example, the term "configured / configured" or the term "defined / defined" may refer to (pre-) configuration from a base station or network (for each resource pool) (through predefined signaling (e.g., SIB, MAC, RRC, etc.)).

[0160] 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) or in-sync (IS) indicator.

[0161] In addition, in the present disclosure, for example, RB may be replaced / replaced by a subcarrier. In addition, in the present disclosure, for example, a packet or flow may be replaced / replaced by a TB or a MAC PDU based on a transport layer.

[0162] Furthermore, in the present disclosure, CBG may be replaced / replaced by TB.

[0163] Furthermore, in the present disclosure, for example, a source ID may be exchanged / replaced by a destination ID.

[0164] 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.

[0165] In addition, in the present disclosure, for example, the operation of the sending UE reserving / selecting / determining retransmission resources may include: the operation of the sending UE reserving / selecting / determining potential retransmission resources whose actual use will be determined based on the SL HARQ feedback information received from the receiving UE.

[0166] 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.

[0167] Further, in the disclosure, SL MODE 1 can refer to a resource allocation method or a communication method in which a base station directly schedules a SL transmission resource for a TX UE through a pre-defined signaling (e.g., DCI or RRC message). For example, SL MODE 2 can refer to a resource allocation method or a communication method in which a UE independently selects a SL transmission resource in a resource pool pre-configured or configured from a base station or a network. For example, a UE performing SL communication based on SL MODE 1 can be referred to as a MODE 1 UE or a MODE 1 TX UE, and a UE performing SL communication based on SL MODE 2 can be referred to as a MODE 2 UE or a MODE 2 TX UE.

[0168] Further, in the disclosure, for example, a dynamic grant (DG) can be replaced / replaced by a configured grant (CG) and / or a semi-persistent scheduling (SPS) grant, or vice versa. For example, a DG can be replaced / replaced by a combination of a CG and an SPS grant, or vice versa. Alternatively, a CG can be replaced / replaced by a CG type 1 or a CG type 2, or vice versa.

[0169] Further, in the disclosure, for example, a channel can be replaced / replaced by a signal, or vice versa.

[0170] Further, in the disclosure, for example, a broadcast type can be replaced / replaced by at least one of unicast, groupcast, and / or broadcast, or vice versa.

[0171] Further, in the disclosure, for example, a resource can be replaced / replaced by a time slot or a symbol, or vice versa. For example, a resource can include a time slot and / or a symbol.

[0172] Further, in the disclosure, a blind retransmission can refer to a retransmission performed by a TX UE without receiving SL HARQ feedback information from an RX UE. For example, a retransmission based on SL HARQ feedback can refer to a retransmission performed by a TX UE based on SL HARQ feedback information received from an RX UE. Specifically, for example, in the case where a TX UE performs a retransmission based on SL HARQ feedback, if the TX UE receives NACK and / or DTX information from the RX UE, the TX UE can perform a retransmission to the RX UE.

[0173] Further, in the disclosure, time can be replaced / replaced by frequency, or vice versa.

[0174] Further, in the disclosure, for example, for convenience of description, a (physical) channel used by an RX UE to transmit at least one of the following information to a TX UE can be referred to as a PSFCH.

[0175] -SL HARQ feedback, SL CSI, SL (L1) RSRP

[0176] 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.

[0177] In addition, when performing secondary link communication, for example, the method in which the transmitting UE reserves or predetermines the transmission resources for the receiving UE may be based on the following description. Figure 12a 、 Figure 12b or Figure 13 implementation method.

[0178] Figure 12a and Figure 12b An example of chain-based resource reservation is shown.

[0179] For example, the transmitting UE may perform the reservation of the transmitting resources based on the chain. Specifically, for example, when the transmitting UE performs the reservation of K transmitting resources, the location information of less than K transmitting resources may be sent or informed to the receiving UE through the SCI sent to the receiving UE at any (or specific) transmitting time point or time resource. That is, for example, the SCI may include the location information of less than K transmitting resources. Or, for example, when the transmitting UE reserves K transmitting resources associated with a specific TB, the location information of less than K transmitting resources may be sent or informed to the receiving UE through the SCI sent to the receiving UE at any (or specific) transmitting time point or time resource. That is, the SCI may include the location information of less than K transmitting resources. At this time, for example, the transmitting UE only signals the location information of less than K transmitting resources to the receiving UE through one SCI sent at any (or specific) transmitting time point or time resource, thereby preventing performance degradation due to an excessive increase in the SCI payload. Specifically, for example, Figure 12a The method for the transmitting UE to perform chain-based resource reservation is shown when the value of K is 4 and the transmitting UE signals the location information of (at most) two transmitting resources to the receiving UE through one SCI. In addition, for example, Figure 12b The method for the transmitting UE to perform chain-based resource reservation is shown when the value of K is 4 and the transmitting UE signals the location information of (up to) three transmitting resources to the receiving UE via one SCI. Figure 12a and Figure 12b In , only the location information of the fourth transmission-related resource can be sent / signaled to the receiving UE via the fourth (or last) transmission-related PSCCH sent by the transmitting UE. And / or, for example, in Figure 12aIn , the location information of the third transmission-related resource may be additionally transmitted / signaled to the receiving UE via the fourth (or last) transmission-related PSCCH transmitted by the transmitting UE. And / or, for example, in Figure 12b In the example, the location information of the second transmission and third transmission related resources can be additionally transmitted / signaled to the receiving UE via the fourth (or last) transmission related PSCCH transmitted by the transmitting UE. Figure 12a and Figure 12b When only the location information of the fourth transmission-related resource is transmitted / signaled to the receiving UE via the fourth (or last) transmission-related PSCCH transmitted by the transmitting UE, the transmitting UE may configure or designate the location information field / bit of the unused or remaining transmission resources to a pre-configured value (e.g., 0). Or, for example, when Figure 12a and Figure 12b When only the location information of the fourth transmission-related resources is sent / signaled to the receiving UE via the fourth (or last) transmission-related PSCCH sent by the transmitting UE, the transmitting UE may configure or specify the location information field / bit of the unused or remaining transmission resources to indicate a pre-configured state / bit value indicating that it is the last transmission (among the four transmissions).

[0180] Figure 13 An example of block-based resource reservation is shown.

[0181] For example, the transmitting UE may perform reservation of transmission resources on a block basis. Specifically, for example, when the transmitting UE performs reservation of K transmission resources, all location information related to the K transmission resources may be sent or notified to the receiving UE through an SCI sent to the receiving UE at any (or specific) transmission time point or time resource. That is, the SCI may include the location information of the K transmission resources. Or, for example, when the transmitting UE performs reservation of K transmission resources associated with a specific TB, all location information related to the K transmission resources may be sent or notified to the receiving UE through an SCI sent to the receiving UE at any (or specific) transmission time point or time resource. That is, the SCI may include the location information of the K transmission resources. For example, Figure 13 It is shown that when the value of K is 4, the transmitting UE performs a block-based resource reservation method by signaling location information of four transmission resources to the receiving UE via one SCI.

[0182] Figure 14 A method for determining resources for secondary link transmission by a first device and a second device according to an embodiment of the present disclosure is shown.

[0183] In one embodiment, Figure 14 The first device shown in the flowchart may correspond to the Figure 15 and Figure 16 the first device, and Figure 14 The second device shown in the flowchart may correspond to the second device described later. Figure 15 and Figure 16 The second device.

[0184] In step S1410, the first device according to the embodiment may determine a first resource for the first sub-link transmission to the second device. In step S1420, the first device according to the embodiment may receive sub-link control information (SCI) including information related to the second resource for the second sub-link transmission from the third device. In step S1430, the first device according to the embodiment may determine to reselect the first resource based on the overlapping first and second resources and the relationship between the first priority value of the first sub-link transmission and the second priority value of the second sub-link transmission that meet the pre-configured conditions. In step S1440, the first device according to the embodiment may send the first physical sub-link control channel (PSCCH) related to the first sub-link transmission or the first physical sub-link shared channel (PSSCH) related to the first PSCCH to the second device based on the third resource determined by reselecting the first resource.

[0185] Hereinafter, various embodiments and examples directly or indirectly related to at least one of steps S1410 to S1440 will be described.

[0186] Hereinafter, for the convenience of description, the side link information with a (relatively) high priority may be referred to as the first SL information, and the side link information with a (relatively) low priority may be referred to as the second SL information. For example, the priority of the first SL information may be higher than the priority of the second SL information.

[0187] If preemption-based resource reselection operations occur frequently, the probability of avoiding transmission resource conflicts between UEs may decrease. Therefore, a standard / method for effectively determining preemption resources may be needed.

[0188] Based on the embodiments of the present disclosure, in order to protect the first SL information sent by the first UE, even if the second UE (has) sent resource reservation information related to the second SL information in order to send the second SL information, the second UE can perform resource reselection on all reserved resources or remaining reserved resources related to the sending of the second SL information when the resources related to the sending of the first SL information and the resources related to the sending of the second SL information partially or completely overlap. And / or, for example, the second UE can omit / skip SL sending. For example, the second UE may not send the second SL information.

[0189] And / or, for example, in order to protect the first SL information transmitted by the first UE, even if the second UE (has) transmitted resource reservation information related to the second SL information in order to transmit the second SL information, the second UE may, when the resources related to the transmission of the first SL information and the resources related to the transmission of the second SL information partially or completely overlap, perform resource reselection on the reserved resources (e.g., low-priority reserved resources) that overlap with the resources related to the transmission of the first SL information. And / or, for example, the second UE may omit / skip SL transmission. For example, the second UE may not transmit the second SL information.

[0190] In an embodiment, the second UE may correspond to a subsequent Figure 15 and Figure 16 , and the first UE may correspond to the first device described in Figure 15 and Figure 16 The second device described in .

[0191] In various embodiments of the present disclosure, the second UE may transmit resource reservation information via PSCCH and / or PSSCH. In various embodiments of the present disclosure, the second UE may detect resources related to the transmission of the first SL information based on decoding of the PSCCH and / or PSSCH.

[0192] Based on the embodiments of the present disclosure, the second UE may be configured to follow the following (some) rules. Herein, for example, it may be configured or determined differently or restrictedly whether to apply the following (some) proposed rules for a chain-based resource reservation operation, a block-based resource reservation operation, a blind retransmission operation, a retransmission operation based on SLHARQ feedback, a resource selection / reservation / determination operation based on configuration authorization, and / or a resource selection / reservation / determination operation based on dynamic authorization. And / or, for example, it may be configured or determined differently or restrictedly whether to apply the following (some) proposed rules based on resource pool, service type, service priority, broadcast type, destination UE, (L1 or L2) destination (or source) ID, (service) QoS parameters (e.g., reliability, waiting time), (resource pool) congestion level, and / or SL mode (e.g., mode 1, mode 2).

[0193] And / or, for example, parameters (e.g., thresholds) can be configured or determined differently or restrictively for a chain-based resource reservation operation, a block-based resource reservation operation, a blind retransmission operation, a SL HARQ feedback-based retransmission operation, a configured grant-based resource selection / reservation / determination operation, and / or a dynamic grant-based resource selection / reservation / determination operation. And / or, for example, parameters (e.g., thresholds) can be configured or determined differently or restrictively based on a resource pool, a service type, a service priority, a cast type, a destination UE, a (L1 or L2) destination (or source) ID, a (service) QoS parameter (e.g., reliability, latency), a (resource pool) congestion level, and / or a SL mode (e.g., mode 1, mode 2).

[0194] Based on the embodiments of the present disclosure, if the second UE has transmitted resource reservation information related to the second SL information in order to transmit the second SL information, and if the resources related to the transmission of the first SL information of the first UE and the resources related to the transmission of the second SL information of the second UE partially or completely overlap, and if the following (some) conditions are met, the second UE can perform resource reselection on all or remaining reserved resources related to the transmission of the second SL information. And / or, for example, the second UE can omit / skip the SL transmission. For example, the second UE can not transmit the second SL information.

[0195] And / or, for example, if the second UE has transmitted resource reservation information related to the second SL information in order to transmit the second SL information, and if the resources related to the transmission of the first SL information of the first UE and the resources related to the transmission of the second SL information of the second UE partially or completely overlap, and if the following (some) conditions are met, the second UE can perform resource reselection on the reserved resources (e.g., low-priority reserved resources) overlapping with the resources related to the transmission of the first SL information. And / or, for example, the second UE can omit / skip the SL transmission. For example, the second UE can not transmit the second SL information.

[0196] Here, for example, thresholds in the following conditions can be configured or determined differently or independently based on a (relative) low priority. And / or, for example, thresholds in the following conditions can be configured or determined differently or independently based on a (relative) high priority. And / or, for example, thresholds in the following conditions can be configured or determined differently or independently based on a combination of a (relative) low priority and a (relative) high priority.

[0197] 1) First condition: if an RSRP value related to the first SL information is higher than a preconfigured threshold (hereinafter, PRE_RSRPTH), and / or

[0198] 2) Second condition: if the difference between the priority of the first SL information and the priority of the second SL information exceeds a pre-configured threshold;

[0199] For example, the PRE_RSRPTH value may be configured or determined differently or independently from the RSRP threshold applied when the UE performing the transmission of the second SL information performs sensing for resource selection. For example, the RSRP threshold applied when the UE performs sensing for resource selection may be an RSRP threshold used by the UE to exclude resources from which relatively high interference is received / predicted. For example, the RSRP value may be an RSRP value measured on the PSSCH. And / or, for example, the RSRP value may be an RSRP value measured on the PSCCH.

[0200] For example, the PRE_RSRPTH value may be configured or determined only for the priority value of another UE detected by the UE that performs the transmission of the second SL information. For example, the PRE_RSRPTH value may be configured or determined only for the high priority value of another UE detected by the UE that performs the transmission of the second SL information. For example, the PRE_RSRPTH value may be configured or determined for a combination of a low priority and a (detected) high priority of another UE detected by the UE that performs the transmission of the second SL information.

[0201] In addition, if the second UE (has) sent resource reservation information related to the second SL information in order to send the second SL information, and if the resources related to the sending of the first SL information of the first UE and the resources related to the sending of the second SL information of the second UE partially or completely overlap, and if (some) conditions are not met, the second UE may not perform resource reselection on all reserved resources or remaining reserved resources related to the sending of the second SL information. And / or, for example, the second UE may perform SL sending. For example, the second UE may send the second SL information by using the resources reserved for the sending of the second SL information.

[0202] And / or, for example, if the second UE (has) transmitted resource reservation information related to the second SL information in order to transmit the second SL information, and if the resources related to the transmission of the first SL information of the first UE and the resources related to the transmission of the second SL information of the second UE partially or completely overlap, and if (some) conditions are not met, the second UE may not perform resource reselection on the reserved resources (e.g., low-priority reserved resources) that overlap with the resources related to the transmission of the first SL information. And / or, for example, the second UE may perform SL transmission. For example, the second UE may transmit the second SL information by using the resources reserved for the transmission of the second SL information.

[0203] In one example, when a UE (has) signaled (via PSCCH (and / or PSSCH)) resource reservation information through which the resource overlaps with the resources related to the sending of a (relatively) high priority message, the UE that performs the sending of a (relatively) low priority message may perform resource reselection on the remaining (or all) reserved resources related to the low priority message (and / or the (low priority) reserved resources that overlap with the resources used for the high priority message) and / or omit / skip (message) sending only if the following (some) conditions are met. Herein, as an example, the thresholds in the following conditions may be configured differently (or independently) according to (a combination of) (relatively) low priority (and / or (relatively) high priority).

[0204] Condition 1) If the RSRP value (in PSSCH (and / or PSCCH)) associated with a (relatively) high priority message is above a pre-configured threshold (PRE_RSRPTH), and / or

[0205] Condition 2) For example, the PRE_RSRPTH value may be configured to be different from (or independent of) the RSRP threshold (in the PSSCH (and / or PSCCH)) applied by a UE performing (relatively) low priority message transmission when performing sensing for resource selection (for excluding operations in which resources with relatively high interference are received / predicted).

[0206] Condition 3) For example, the PRE_RSRPTH value may be configured only for the (high) priority value of another UE detected by the UE performing (relatively) low priority message transmission (and / or for a combination of low priority and (detected) high priority).

[0207] Condition 4) If the difference in priority exceeds a pre-configured threshold

[0208] Figure 15 A method for a first device to perform secondary link communication according to an embodiment of the present disclosure is shown.

[0209] Figure 15 The embodiments may be combined with various methods and / or processes proposed based on various embodiments of the present disclosure.

[0210] Reference Figure 15 In step S1510, the first device may reserve a first resource. For example, the first resource may be a resource related to the transmission of a message having a relatively lower priority than a message transmitted on the second resource.

[0211] In step S1520, the first device may determine whether the first resource overlaps with the second resource and whether a specific condition is satisfied. For example, the second resource may be a resource related to the transmission of a message having a relatively higher priority than the priority of the message transmitted on the first resource. For example, the second resource may be a resource reserved by a device different from the first device. For example, the second resource may be a resource reserved by the second device. For example, based on various embodiments of the present disclosure, the first device may determine whether the first resource overlaps with the second resource and whether a specific condition is satisfied.

[0212] In step S1530, the first device may perform resource reselection based on the determination. For example, based on various embodiments of the present disclosure, the first device may perform resource reselection or may not perform secondary link transmission on the first resource.

[0213] Alternatively, the first device may not perform resource reselection based on the determination. For example, based on various embodiments of the present disclosure, the first device may not perform resource reselection or may perform secondary link transmission on the first resource.

[0214] Figure 16 The operation of the first device according to the embodiment of the present disclosure is shown.

[0215] Can be performed in combination with various embodiments of the present disclosure Figure 16 For example, based on Figures 18 to 23 At least one of the devices illustrated in Figure 16 The operations disclosed in the flowchart. For example, Figure 16 The first device in the embodiment may be the one described later. Figure 19 In another example, Figure 16 The first device in the embodiment may be the one described later. Figure 19 The second wireless device 200 in.

[0216] In step S1610 , the first device according to the embodiment may determine a first resource for first sub-link transmission.

[0217] In step S1620, the first device according to the embodiment may receive sub-link control information (SCI) including information related to the second resource used for second sub-link transmission from the third device.

[0218] In step S1630, the first device according to the embodiment can determine to reselect the first resource based on the overlap of the first resource and the second resource and the relationship between the first priority value sent by the first sub-link and the second priority value sent by the second sub-link meeting the pre-configured conditions.

[0219] In step S1640, the first device according to the embodiment can transmit the first physical sublink control channel (PSCCH) related to the first sublink transmission or the first PSSCH related to the first PSCCH to the second device based on the third resource determined by reselecting the first resource.

[0220] In an embodiment, the preconfigured condition may include a condition that the first priority value is greater than the second priority value.

[0221] In an embodiment, the preconfigured condition may further include a condition that a difference between the second priority value and the first priority value exceeds a preconfigured threshold priority difference.

[0222] In an embodiment, the preconfigured threshold priority difference value may be determined based on at least one of a resource reservation operation type, a resource configuration method type, a retransmission method type, a resource pool, a service type, a service priority, a broadcast type, a destination ID, a source ID, a quality of service (QoS) parameter, a congestion level, a first priority value, or a mode type.

[0223] In an embodiment, the preconfigured condition may include a condition that the second priority value is less than a preconfigured threshold priority value.

[0224] In an embodiment, the preconfigured threshold priority value may be determined based on at least one of a resource reservation operation type, a resource configuration method type, a retransmission method type, a resource pool, a service type, a service priority, a broadcast type, a destination ID, a source ID, a quality of service (QoS) parameter, a congestion level, a first priority value, or a mode type.

[0225] In an embodiment, determining to reselect the first resource may include: comparing a preconfigured reference signal received power (RSRP) threshold with an RSRP value of a second PSCCH or an RSRP value of a second PSSCH related to the SCI; and determining to reselect the first resource based on the RSRP value of the second PSCCH or the RSRP value of the second PSSCH being greater than the preconfigured RSRP threshold.

[0226] In an embodiment, the preconfigured RSRP threshold may be determined based on QoS parameters or congestion level.

[0227] In an embodiment, the preconfigured RSRP threshold may be determined based on the service type or service priority.

[0228] In an embodiment, the preconfigured RSRP threshold may be determined based on the broadcast type or mode type.

[0229] Based on the embodiments of the disclosure, a first device configured to perform a sidelink (SL) communication with a second device can be provided. The first device can include at least one memory storing instructions, at least one transceiver, and at least one processor connected to the at least one memory and the at least one transceiver. The at least one processor can execute the instructions to determine a first resource for a first sidelink transmission, receive, from a third device, a sidelink control information (SCI) including information related to a second resource for a second sidelink transmission, determine to reselect the first resource based on an overlap of the first resource with the second resource and a relationship between a first priority value of the first sidelink transmission and a second priority value of the second sidelink transmission satisfying a preconfigured condition, and transmit, to the second device, a first physical sidelink control channel (PSCCH) related to the first sidelink transmission or a first PSSCH related to the first PSCCH based on a third resource determined by reselecting the first resource, wherein the preconfigured condition includes a condition that the first priority value is greater than the second priority value.

[0230] Based on the embodiments of the disclosure, a device (or chip (set)) configured to control a first user equipment (UE) to perform a sidelink (SL) communication with a second UE can be provided. The device can include at least one processor and at least one memory connected to the at least one processor and storing instructions. The at least one processor can execute the instructions to determine a first resource for a first sidelink transmission, receive, from a third UE, a sidelink control information (SCI) including information related to a second resource for a second sidelink transmission, determine to reselect the first resource based on an overlap of the first resource with the second resource and a relationship between a first priority value of the first sidelink transmission and a second priority value of the second sidelink transmission satisfying a preconfigured condition, and transmit, to the second UE, a first physical sidelink control channel (PSCCH) related to the first sidelink transmission or a first PSSCH related to the first PSCCH based on a third resource determined by reselecting the first resource, wherein the preconfigured condition includes a condition that the first priority value is greater than the second priority value.

[0231] For example, the first UE of the embodiment can refer to the first device described in the disclosure. For example, each of the at least one processor and the at least one memory in the device configured to control the first UE can be implemented as a separate sub-chip, or at least two or more components can be implemented through one sub-chip.

[0232] Based on an embodiment of the present disclosure, a non-transitory computer-readable storage medium storing instructions may be provided. When the instructions are executed, the first device may: determine a first resource for a first sub-link transmission; receive sub-link control information (SCI) including information related to a second resource for a second sub-link transmission from a third device; determine to reselect the first resource based on the overlap of the first resource and the second resource and the relationship between the first priority value of the first sub-link transmission and the second priority value of the second sub-link transmission meeting a pre-configured condition; and based on the third resource determined by reselecting the first resource, send a first physical sub-link control channel (PSCCH) related to the first sub-link transmission or a first PSSCH related to the first PSCCH to a second device, wherein the pre-configured condition includes a condition that the first priority value is greater than the second priority value.

[0233] Figure 17 The operation of the second device according to the embodiment of the present disclosure is shown.

[0234] Can be performed in combination with various embodiments of the present disclosure Figure 17 For example, based on Figures 18 to 23 At least one of the devices illustrated in Figure 17 The operations disclosed in the flowchart. For example, Figure 17 The second device in the embodiment may be the one described later. Figure 19 In another example, Figure 17 The second device in the embodiment may be the one described later. Figure 19 The first wireless device 100 in.

[0235] In step S1710, the second device according to the embodiment can receive the first PSCCH related to the first sublink transmission or the first PSSCH related to the first PSCCH from the first device based on the second resource determined by the first device by reselecting the first resource for the first sublink transmission.

[0236] In an embodiment, the first device can receive an SCI including information related to a third resource used for transmission of the second sub-link from a third device, and based on the overlap of the first resource and the second resource and the relationship between the first priority value transmitted by the first sub-link and the second priority value transmitted by the second sub-link satisfying a pre-configured condition, the first device can determine to reselect the first resource.

[0237] In an embodiment, the preconfigured condition may include a condition that the first priority value is greater than the second priority value.

[0238] In an embodiment, the preconfigured condition may further include a condition that a difference between the second priority value and the first priority value exceeds a preconfigured threshold priority difference.

[0239] In an embodiment, the preconfigured threshold priority difference value may be determined based on at least one of a resource reservation operation type, a resource configuration method type, a retransmission method type, a resource pool, a service type, a service priority, a broadcast type, a destination ID, a source ID, a quality of service (QoS) parameter, a congestion level, a first priority value, or a mode type.

[0240] In an embodiment, the preconfigured condition may include a condition that the second priority value is less than a preconfigured threshold priority value.

[0241] In an embodiment, the preconfigured threshold priority value may be determined based on at least one of a resource reservation operation type, a resource configuration method type, a retransmission method type, a resource pool, a service type, a service priority, a broadcast type, a destination ID, a source ID, a quality of service (QoS) parameter, a congestion level, a first priority value, or a mode type.

[0242] In an embodiment, determining to reselect the first resource may include: comparing a preconfigured reference signal received power (RSRP) threshold with an RSRP value of a second PSCCH or an RSRP value of a second PSSCH related to the SCI; and determining to reselect the first resource based on the RSRP value of the second PSCCH or the RSRP value of the second PSSCH being greater than the preconfigured RSRP threshold.

[0243] In an embodiment, the preconfigured RSRP threshold may be determined based on QoS parameters or congestion level.

[0244] In an embodiment, the preconfigured RSRP threshold may be determined based on the service type or service priority.

[0245] In an embodiment, the preconfigured RSRP threshold may be determined based on the broadcast type or mode type.

[0246] Based on the embodiments of the disclosure, a second device configured to perform sidelink (SL) communication with a first device can be provided. The second device can include at least one memory storing instructions, at least one transceiver, and at least one processor connected to the at least one memory and the at least one transceiver. The at least one processor can execute the instructions to receive, from the first device, a first PSCCH related to a first sidelink transmission or a first PSSCH related to the first PSCCH based on a second resource determined by the first device by reselecting a first resource for the first sidelink transmission, wherein the first device receives, from a third device, SCI including information related to a third resource for a second sidelink transmission, wherein the first device determines to reselect the first resource based on an overlap of the first resource with the third resource and a relationship between a first priority value of the first sidelink transmission and a second priority value of the second sidelink transmission satisfying a preconfigured condition, and wherein the preconfigured condition includes a condition that the first priority value is greater than the second priority value.

[0247] The various embodiments of the disclosure can be independently implemented. Alternatively, the various embodiments of the disclosure can be implemented by combination or integration. For example, although the various embodiments of the disclosure have been described based on the 3GPP LTE system for convenience of explanation, the various embodiments of the disclosure can be extendedly applied to another system other than the 3GPP LTE system. For example, the various embodiments of the disclosure can be used in the case of uplink or downlink, not only limited to direct communication between UEs. In this case, a base station, a relay node, etc. can use the proposed method according to the various embodiments of the disclosure. For example, it can be defined that information on whether to apply the method according to the various embodiments of the disclosure is reported by a base station to a UE or by a transmitting UE to a receiving UE through pre-defined signaling (e.g., physical layer signaling or higher layer signaling). For example, it can be defined that information on the rule according to the various embodiments of the disclosure is reported by a base station to a UE or by a transmitting UE to a receiving UE through pre-defined signaling (e.g., physical layer signaling or higher layer signaling). For example, some of the various embodiments of the disclosure can be restrictively applied only to resource allocation mode 1. For example, some of the various embodiments of the disclosure can be restrictively applied only to resource allocation mode 2.

[0248] Hereinafter, a device to which the various embodiments of the disclosure can be applied will be described.

[0249] 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 (e.g., 5G) between devices.

[0250] 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.

[0251] Figure 18 A communication system (1) according to an embodiment of the present disclosure is shown.

[0252] 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, 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.

[0253] Herein, the wireless communication technology implemented in the wireless devices 100a to 100f of the disclosure can include, in addition to LTE, NR, and 6G, a narrowband Internet of Things for low-power communication. In this case, for example, the NB-IoT technology can be an example of a low-power wide-area network (LPWAN) technology, and can be implemented as a standard such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the above name. Additionally or alternatively, the wireless communication technology implemented in the wireless devices 100a to 100f of the disclosure can perform communication based on LTE-M technology. In this case, as an example, the LTE-M technology can be an example of a LPWAN, and can be referred to by various names including enhanced machine type communication (eMTC) or the like. For example, the LTE-M technology can 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, and is not limited to the above name. Additionally or alternatively, the wireless communication technology implemented in the wireless devices 100a to 100f of the disclosure can include at least one of Bluetooth, low-power wide-area network (LPWAN), and ZigBee considering low-power communication, and is not limited to the above name. As an example, the ZigBee technology can generate a personal area network (PAN) related to small / low-power digital communication based on various standards including IEEE 802.15.4 or the like, and can be referred to by various names.

[0254] The wireless devices 100a to 100f can be connected to the network 300 via the BS 200. The AI technology can be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f can be connected to the 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 the wireless devices 100a to 100f can communicate with each other through the BS 200 / network 300, the wireless devices 100a to 100f can perform direct communication (e.g., sidelink communication) between each other without passing through the BS / network. For example, the vehicles 100b-1 and 100b-2 can perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). The IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0255] 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.

[0256] Figure 19 A wireless device according to an embodiment of the present disclosure is shown.

[0257] 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.

[0258] 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.

[0259] 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.

[0260] The hardware elements of wireless devices 100 and 200 will be described in more detail below. One or more protocol layers may be, but are not limited to, implemented by 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 signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed herein, and provide the generated signals to one or more transceivers 106 and 206. One or more processors 102 and 202 can receive signals (e.g., baseband signals) from one or more transceivers 106 and 206 and obtain PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document.

[0261] The one or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. The 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 the 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. The firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be included in the one or more processors 102 and 202 or stored in one or more memories 104 and 204, thereby being driven by the one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be implemented using software or firmware in the form of code, commands, and / or command sets.

[0262] 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.

[0263] The one or more transceivers 106 and 206 can transmit user data, control information, and / or radio signals / channels mentioned in the methods and / or operational flows of the present document, to one or more other apparatuses. The one or more transceivers 106 and 206 can receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functionalities, procedures, proposals, methods, and / or operational flows disclosed in the present document, from one or more other apparatuses. For example, the one or more transceivers 106 and 206 can be connected to the one or more processors 102 and 202, and can transmit and receive radio signals. For example, the one or more processors 102 and 202 can perform control so that the one or more transceivers 106 and 206 can transmit user data, control information, or radio signals to one or more other apparatuses. The one or more processors 102 and 202 can perform control so that the one or more transceivers 106 and 206 can receive user data, control information, or radio signals from one or more other apparatuses. The one or more transceivers 106 and 206 can be connected to the one or more antennas (antenna elements) 108 and 208, and the one or more transceivers 106 and 206 can be configured to transmit and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functionalities, procedures, proposals, methods, and / or operational flows disclosed in the present document, through the one or more antennas 108 and 208. In the present document, the one or more antennas can be a plurality of physical antennas or a plurality of logical antennas (e.g., antenna ports). The one or more transceivers 106 and 206 can convert received radio signals / channels, etc. from RF band signals to baseband signals, in order to process received user data, control information, radio signals / channels, etc. using the one or more processors 102 and 202. The one or more transceivers 106 and 206 can convert user data, control information, radio signals / channels, etc. processed using the one or more processors 102 and 202, from baseband signals to RF band signals. To do so, the one or more transceivers 106 and 206 can include (analog) oscillators and / or filters.

[0264] Figure 20 A signal processing circuit for transmitting a signal according to an embodiment of the disclosure is illustrated.

[0265] Referring to Figure 20 , the signal processing circuit (1000) can include a scrambler (1010), a modulator (1020), a layer mapper (1030), a precoder (1040), a resource mapper (1050), and a signal generator (1060). The operations / functions of Figure 20 may be performed without being limited to the processors (102, 202) and / or transceivers (106, 206) of Figure 19 . The operations / functions of Figure 19The 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 implemented by Figure 19 The transceiver (106, 206) is used to implement block 1060.

[0266] 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).

[0267] 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.

[0268] 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.

[0269] Can be used with Figure 20 The signal processing process for the signal received in the wireless device is configured in a manner opposite to the signal processing process (1010-1060) of the wireless device. Figure 19 100, 200) can receive a radio signal from the outside through an antenna port / transceiver. The received radio signal can be converted into a baseband signal by a signal restorer. To this end, the signal restorer may include a downconverter, an analog-to-digital converter (ADC), a CP remover, and a fast Fourier transform (FFT) module. Next, the baseband signal can be restored to a codeword through a resource demapping process, a post-coding process, a demodulation processor, and a descrambling process. The codeword can be restored to the original information block by decoding. Therefore, a signal processing circuit (not shown) for receiving a signal may include a signal restorer, a resource demapper, a post-coding process, a demodulator, a descrambler, and a decoder.

[0270] 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 ).

[0271] Reference Figure 21 , the wireless device (100, 200) may correspond to Figure 19 The wireless devices (100, 200) may be configured by various elements, components, units / portions and / or modules. For example, each of the wireless devices (100, 200) may include a communication unit (110), a control unit (120), a storage unit / memory (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, 202) and / or one or more memories (104, 204). For example, the transceiver(s) (114) may include Figure 19The control unit (120) is electrically connected to the communication unit (110), the memory (130), and the additional components (140), and controls the overall operation of the wireless device. For example, the control unit (120) can control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit (130). The control unit (120) can transmit information stored in the memory unit (130) to the outside (e.g., other communication devices) via the communication unit (110) through a wireless / wired interface, or store information received from the outside (e.g., other communication devices) via the communication unit (110) through a wireless / wired interface in the memory unit (130).

[0272] 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.

[0273] exist Figure 21In the wireless device (100, 200), the various elements, components, units / parts and / or modules in the wireless device (100, 200) can all be connected to each other through a wired interface, or at least part of them can be connected wirelessly through the communication unit (110). For example, in each of the wireless devices (100, 200), the control unit (120) and the communication unit (110) can be connected through a wired interface, and the control unit (120) and the first unit (e.g., 130, 140) can be connected wirelessly through the communication unit (110). Each element, component, unit / part and / or module in the wireless device (100, 200) can also include one or more elements. For example, the control unit (120) can be constructed by a collection of one or more processors. As an example, the control unit (120) can be constructed by a collection of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing unit and a memory control processor. As another example, the memory ( 130 ) may be constructed by random access memory (RAM), dynamic RAM (DRAM), read only memory (ROM), flash memory, volatile memory, nonvolatile memory, and / or combinations thereof.

[0274] Hereinafter, the implementation will be described in detail with reference to the accompanying drawings. Figure 21 .

[0275] 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).

[0276] 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.

[0277] 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.

[0278] 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.

[0279] 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.

[0280] 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.

[0281] 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.

[0282] 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.

[0283] The scope of the present disclosure may be expressed by the appended claims, and it should be understood that all variations or modifications derived from the meaning and scope of the claims and their equivalents may be included in the scope of the present disclosure.

[0284] 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 secondary link communication with a second device by a first device, the method comprising the following steps: determining a first resource for transmitting on a first sublink; receiving, from a third device, first sub-link control information SCI including information related to a second resource for second sub-link transmission; determining to reselect the first resource based on (i) an overlap between the first resource and the second resource, (ii) a first priority value transmitted by the first sublink being greater than a second priority value transmitted by the second sublink, and (iii) the second priority value being less than a threshold priority value configured for preemption-based resource reselection; as well as A first physical sublink control channel PSCCH related to the first sublink transmission or a first physical sublink shared channel PSSCH related to the first PSCCH is transmitted to the second device based on a third resource determined by reselecting the first resource.

2. The method according to claim 1, wherein The determining to reselect the first resource is further based on a difference between the first priority value and the second priority value exceeding the threshold priority value.

3. The method according to claim 1, wherein The threshold priority value is configured per resource pool.

4. The method according to claim 1, wherein Determining to reselect the first resource includes: Comparing a reference signal received power (RSRP) threshold with an RSRP value associated with the second sublink transmission; and Based on the RSRP value associated with the second sub-link transmission being greater than the RSRP threshold, it is determined to reselect the first resource.

5. The method according to claim 4, wherein The RSRP threshold is determined based on a Quality of Service (QoS) parameter or a congestion level.

6. The method according to claim 4, wherein: The RSRP threshold is determined based on service type, service priority, broadcast type, or mode type.

7. A first device configured to perform secondary link communication with a second device, 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, the instructions causing the first device to perform operations upon execution by the at least one processor, the operations comprising: determining a first resource for transmitting on a first sublink; receiving, from a third device, first sub-link control information SCI including information related to a second resource for second sub-link transmission; determining to reselect the first resource based on (i) an overlap between the first resource and the second resource, (ii) a first priority value transmitted by the first sublink being greater than a second priority value transmitted by the second sublink, and (iii) the second priority value being less than a threshold priority value configured for preemption-based resource reselection; and A first physical sublink control channel PSCCH related to the first sublink transmission or a first physical sublink shared channel PSSCH related to the first PSCCH is transmitted to the second device based on a third resource determined by reselecting the first resource.

8. A device configured to control a first user equipment (UE) to perform secondary link communication with a second UE, the device comprising: at least one processor; as well as At least one memory, the at least one memory being connected to the at least one processor and storing instructions, the instructions being executed by the at least one processor to cause the first UE to perform operations, the operations comprising: determining a first resource for transmitting on a first sublink; receiving, from a third UE, first sub-link control information SCI including information related to second resources for second sub-link transmission; determining to reselect the first resource based on (i) an overlap between the first resource and the second resource, (ii) a first priority value transmitted by the first sublink being greater than a second priority value transmitted by the second sublink, and (iii) the second priority value being less than a threshold priority value configured for preemption-based resource reselection; and A first physical sublink control channel PSCCH related to the first sublink transmission or a first physical sublink shared channel PSSCH related to the first PSCCH is transmitted to the second UE based on a third resource determined by reselecting the first resource.

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