Resource elimination method and apparatus for coexistence between different RATs

Abstract

A method for a first device to perform wireless communication and a device to support it are provided. The first device can acquire information related to a resource pool, acquire first priority information for sidelink transmission, receive LTE (long term evolution) SCI (sidelink control information) including resource reservation information and second priority information from the second device, and determine a set of candidate resources for the sidelink transmission.

Description

[Technical Field]

[0001] This disclosure relates to wireless communication systems. [Background technology]

[0002] 5G NR is a new clean-slate mobile communication system that succeeds LTE (Long Term Evolution) and features high performance, low latency, and high availability. 5G NR can utilize all available spectral resources, from the low-frequency band below 1 GHz to the intermediate-frequency band between 1 GHz and 10 GHz, and the high-frequency (millimeter wave) band above 24 GHz.

[0003] The goals of 6G (wireless communication) systems include (i) extremely high data rates per device, (ii) a very large number of connected devices, (iii) global connectivity, (iv) extremely low latency, (v) reduced energy consumption of battery-free IoT (Internet of Things) devices, (vi) ultra-high reliability connectivity, and (vii) connected intelligence with machine learning capabilities. The vision for 6G systems has four aspects: intelligent connectivity, deep connectivity, holographic connectivity, and ubiquitous connectivity, and 6G systems can satisfy the requirements shown in Table 1 below. For example, Table 1 can show an example of the requirements for a 6G system.

[0004] [Table 1] [Overview of the project] [Means for solving the problem]

[0005] A method is provided according to one embodiment of the present disclosure for a first device to perform wireless communication. For example, the method may include the steps of: obtaining information relating to a resource pool; obtaining first priority information for sidelink transmission; receiving LTE (long term evolution) SCI (sidelink control information) from a second device, which includes resource reservation information and second priority information; and determining a set of candidate resources for the sidelink transmission. For example, a candidate resource associated with a PSFCH (physical sidelink feedback channel) resource may be excluded from the set of candidate resources for the sidelink transmission based on the following: (i) a PSFCH (physical sidelink feedback channel) resource is set in the resource pool; (ii) an LTE RSRP (reference signal received power) value measured based on the LTE SCI is greater than an RSRP threshold determined based on the first priority information and the second priority information; and (iii) the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information.

[0006] A first device configured to perform wireless communication is provided according to one embodiment of the present disclosure. For example, the first device may include at least one transceiver; at least one processor; and at least one memory connected to the at least one processor for storing instructions. For example, based on the fact that the instructions are executed by the at least one processor, the first device may: obtain information related to a resource pool; obtain first priority information for sidelink transmissions; receive LTE (long term evolution) SCI (sidelink control information) from a second device, including resource reservation information and second priority information; and determine a set of candidate resources for the sidelink transmissions. For example, a candidate resource associated with a PSFCH (physical sidelink feedback channel) resource may be excluded from the set of candidate resources for the sidelink transmissions based on the fact that (i) a PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) an LTE RSRP (reference signal received power) value measured based on the LTE SCI is greater than an RSRP threshold determined based on the first priority information and the second priority information, and (iii) the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information.

[0007] A processing unit configured to control a first device is provided according to one embodiment of the present disclosure. For example, the processing unit may include at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the first device may be configured to: obtain information related to a resource pool; obtain first priority information for sidelink transmissions; receive LTE (long term evolution) SCI (sidelink control information) from a second device, including resource reservation information and second priority information, based on that the instructions are executed by the at least one processor; and determine a set of candidate resources for the sidelink transmissions. For example, a candidate resource associated with a PSFCH (physical sidelink feedback channel) resource may be excluded from the set of candidate resources for the sidelink transmissions based on (i) a PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) an LTE RSRP (reference signal received power) value measured based on the LTE SCI is greater than an RSRP threshold determined based on the first priority information and the second priority information, and (iii) the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information.

[0008] A non-temporary computer-readable storage medium recording instructions is provided according to one embodiment of the present disclosure. For example, when executed, the instructions may cause a first device to: acquire information relating to a resource pool; acquire first priority information for sidelink transmissions; receive LTE (long term evolution) SCI (sidelink control information) from a second device, including resource reservation information and second priority information; and determine a set of candidate resources for the sidelink transmissions. For example, a candidate resource associated with a PSFCH (physical sidelink feedback channel) resource may be excluded from the set of candidate resources for the sidelink transmissions based on (i) a PSFCH (physical sidelink feedback channel) resource being set in the resource pool, (ii) an LTE RSRP (reference signal received power) value measured based on the LTE SCI being greater than an RSRP threshold determined based on the first priority information and the second priority information, and (iii) the PSFCH slot overlapping with an LTE subframe determined based on the resource reservation information. [Brief explanation of the drawing]

[0009] [Figure 1] This disclosure shows a communication structure that can be provided in a 6G system according to one embodiment of this disclosure. [Figure 2] An electromagnetic spectrum according to one embodiment of this disclosure is shown. [Figure 3] This disclosure presents an example of a typical NTN scenario based on a transparent payload, according to one embodiment of this disclosure. [Figure 4] This disclosure presents an example of a typical NTN scenario based on a regenerative payload, according to one embodiment of this disclosure. [Figure 5]An example of sensing operation according to one embodiment of this disclosure is shown. [Figure 6] This shows a frame slot structure according to one embodiment of the present disclosure. [Figure 7] An example of a BWP according to one embodiment of this disclosure is shown. [Figure 8] One embodiment of this disclosure illustrates a procedure for a terminal to perform V2X or SL communication depending on the resource allocation mode. [Figure 9] This shows an example of an AGC problem that occurs due to NR PSFCH transmission and reception. [Figure 10] One embodiment of this disclosure describes a method for eliminating resources based on LTE reservation resources and RSRP thresholds that overlap with PSFCH opportunities. [Figure 11] This disclosure describes a method by which a first device performs wireless communication according to one embodiment of this disclosure. [Figure 12] This disclosure describes a method by which a second device performs wireless communication according to one embodiment of this disclosure. [Figure 13] A communication system 1 according to one embodiment of this disclosure is shown. [Figure 14] A wireless device according to one embodiment of this disclosure is shown. [Figure 15] A signal processing circuit for a transmitted signal according to one embodiment of this disclosure is shown. [Figure 16] A wireless device according to one embodiment of this disclosure is shown. [Figure 17] A portable device according to one embodiment of this disclosure is shown. [Figure 18] An embodiment of the present disclosure shows a vehicle or an autonomous vehicle. [Modes for carrying out the invention]

[0010] In this specification, "A or B" may mean "just A," "just B," or "both A and B." Furthermore, 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 "just A," "just B," "just C," or "any combination of A, B and C."

[0011] In this specification, slashes ( / ) and commas can mean "and / or". For example, "A / B" can mean "A and / or B". Thus, "A / B" can mean "just A", "just B", or "both A and B". For example, "A, B, C" can mean "A, B or C".

[0012] In this specification, "at least one of A and B" can mean "just A," "just B," or "both A and B." Furthermore, in this specification, the expressions "at least one of A or B" and "at least one of A and / or B" can be interpreted in the same way as "at least one of A and B."

[0013] Furthermore, in this specification, "at least one of A, B and C" may mean "just A," "just B," "just 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" may mean "at least one of A, B and C."

[0014] Furthermore, parentheses used in this specification can mean "for example." Specifically, when "control information (PDCCH)" is shown, "PDCCH" is proposed as an example of "control information." Also, "control information" in this specification is not limited to "PDCCH," and "PDCCH" is proposed as an example of "control information." Similarly, when "control information (i.e., PDCCH)" is shown, "PDCCH" is proposed as an example of "control information."

[0015] In the following explanation, "when, if, in case of" can be replaced with "based on".

[0016] In this specification, technical features described individually within a single drawing may be represented individually or simultaneously.

[0017] In this specification, higher layer parameters may be parameters that are set for a terminal, pre-configured, or predefined. For example, a base station or network may transmit higher layer parameters to a terminal. For example, higher layer parameters may be transmitted via RRC (radio resource control) signaling or MAC (medium access control) signaling.

[0018] In this specification, "configured or defined" can be interpreted as being configured or pre-configured in the device via predefined signaling (e.g., SIB, MAC, RRC) from a base station or network. In this specification, "configured or defined" can be interpreted as being pre-configured in the device.

[0019] The technologies proposed herein can be used in various wireless communication systems such as CDMA (code division multiple access), FDMA (frequency division multiple access), TDMA (time division multiple access), OFDMA (orthogonal frequency division multiple access), and SC-FDMA (single carrier frequency division multiple access). CDMA can be implemented in wireless technologies such as UTRA (universal terrestrial radio access) and CDMA2000. TDMA can be implemented in wireless technologies such as GSM (global system for mobile communications) / GPRS (general packet radio service) / EDGE (enhanced data rates for GSM evolution). OFDMA can be implemented in wireless technologies such as IEEE (institute of electrical and electronics engineers) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, E-UTRA (evolved UTRA), LTE (long term evolution), and 5G NR.

[0020] The technologies proposed herein are implemented in 6G wireless technology and can be applied to various 6G systems. For example, 6G systems can have key factors such as eMBB (enhanced mobile broadband), URLLC (ultra-reliable low latency communications), mMTC (massive machine-type communication), AI (artificial intelligence) integrated communication, tactile internet, high throughput, high network capacity, high energy efficiency, low back haul and access network congestion, and enhanced data security.

[0021] Figure 1 shows a communication structure that can be provided in a 6G system according to one embodiment of the present disclosure. The embodiment of Figure 1 can be combined with various embodiments of the present disclosure.

[0022] The new network characteristics in 6G are as follows:

[0023] - Satellite integrated network

[0024] - Connected Intelligence: Unlike previous generations of wireless communication systems, 6G is revolutionary, updating wireless technology from "connected things" to "connected intelligence." AI can be applied to each step of the communication procedure (or each step of the signal processing described below).

[0025] - Seamless integration of wireless information and energy transfer

[0026] - Ubiquitous Super 3D Connectivity: Connecting drones and very low Earth orbit satellites to the network and core network functions creates Super 3D connectivity in 6G Ubiquitous.

[0027] The following are some common requirements for the characteristics of the new 6G network described above:

[0028] - Small cell networks

[0029] - Ultra-dense heterogeneous network

[0030] - High-capacity backhaul

[0031] - Raider technology integrated with mobile technology: High-precision localization (or location-based services) via communications is one of the functions of 6G wireless communication systems. Therefore, radar systems can be integrated with 6G networks.

[0032] - Softwareization and virtualization

[0033] The core implementation technologies for 6G systems will be described below.

[0034] - Artificial Intelligence: Introducing AI into communications simplifies and improves real-time data transmission. AI can use numerous analyses to determine how complex target operations are performed. In other words, AI can increase efficiency and reduce processing delays. Time-consuming tasks such as handover, network selection, and resource scheduling can be performed instantly using AI. AI can also play an important role in M2M, machine-to-human, and human-to-machine communications. Furthermore, AI enables rapid communication in BCI (Brain-Computer Interface). AI-based communication systems are supported by metamaterials, intelligent structures, intelligent networks, intelligent devices, intelligent radio, self-sustaining wireless networks, and machine learning.

[0035] -THz communication (terahertz communication): Data transmission rates can be increased by increasing bandwidth. This can be achieved by using sub-THz communication with a wide bandwidth and applying advanced large-scale MIMO technology. THz waves, also known as sub-millimeter radiation, typically represent a frequency band between 0.1 THz and 10 THz with wavelengths in the 0.03 mm-3 mm range. The 100 GHz-300 GHz band range (Sub THz band) is considered the main part of the THz band for cellular communication. Adding the Sub-THz band to the mmWave band increases 6G cellular communication capacity. Of the defined THz band, 300 GHz-3 THz is in the far-infrared (IR) frequency band. The 300 GHz-3 THz band is part of a broadband but is at the boundary of the broadband, just behind the RF band. Therefore, this 300 GHz-3 THz band is similar to RF. Figure 2 shows the electromagnetic spectrum according to one embodiment of the present disclosure. The embodiment in Figure 2 can be combined with various embodiments of the present disclosure. The main characteristics of THz communication include (i) a wide bandwidth available to support very high data transmission rates, and (ii) high path loss occurring at high frequencies (highly directional antennas are essential). The narrow beamwidth generated by highly directional antennas reduces interference. The small wavelength of THz signals allows more antenna elements to be integrated into equipment and BS operating in this band. Through this, advanced adaptive array techniques can be used to overcome range limitations.

[0036] - Large-scale MIMO technology

[0037] - Hologram beamforming (HBF)

[0038] -Optical wireless technology

[0039] - Free-space optical backhaul network (FSO backhaul network)

[0040] -Quantum communication

[0041] - Cell-free communication

[0042] - Integration of wireless information and power transmission

[0043] - Integration of sensing and communication (wireless communication and scanning)

[0044] - Integrated access and backhaul network

[0045] - Big data analysis

[0046] - Reconfigurable intelligent surface

[0047] - Metaverse

[0048] - Blockchain

[0049] - Unmanned aerial vehicles (UAVs): UAVs, or drones, will be a crucial element in 6G wireless communication. In most cases, high-speed data wireless connectivity will be provided using UAV technology. Base station (BS) entities can be installed on UAVs to provide cellular connectivity. UAVs have certain features not found in fixed BS infrastructure, such as easy deployment, strong visible line links, and the freedom of controlled mobility. During emergencies such as natural disasters, the deployment of ground communication infrastructure is not economically feasible and sometimes cannot provide services in volatile environments. UAVs can easily handle such situations. UAVs can become a new paradigm in the field of wireless communication. This technology facilitates the three basic requirements of wireless networks: eMBB, URLLC, and mMTC. UAVs can also support various purposes such as improving network connectivity, fire detection, disaster emergency services, security and surveillance, pollution monitoring, parking monitoring, and accident monitoring. Therefore, UAV technology is recognized as one of the most important technologies for 6G communication.

[0050] - Advanced Air Mobility (AAM): AAM is a broader concept than UAM (urban air mobility), which refers to air transport available in urban areas. It encompasses transportation methods that include travel between regional hubs as well as within urban areas.

[0051] - Autonomous driving (self-driving): V2X (vehicle to everything), a key factor in building autonomous driving infrastructure, can be a technology that allows vehicles to communicate and share information with various elements on the road, such as vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I), in order to enable autonomous driving. To maximize the performance of autonomous driving and ensure high safety, fast transmission speeds and low latency technology are absolutely necessary. Furthermore, in the future, autonomous driving may go beyond simply conveying warning and guidance messages to the driver and may need to actively intervene in vehicle operation and directly control the vehicle in dangerous situations. For this reason, the amount of information that needs to be transmitted and received may become enormous, so it is expected that 6G will be able to maximize autonomous driving with faster transmission speeds and lower latency than 5G.

[0052] - Non-terrestrial networks (NTN): NTN can refer to a network or network segment that uses RF (radio frequency) resources onboard a satellite (or UAS (unmanned aerial system) platform). Figure 3 shows an example of a typical scenario of NTN based on a transparent payload according to one embodiment of this disclosure. Figure 4 shows an example of a typical scenario of NTN based on a regenerative payload according to one embodiment of this disclosure. Embodiments of Figure 3 or Figure 4 can be combined with various embodiments of this disclosure. Referring to Figure 3, the satellite (or UAS platform) can generate a service link with the UE. The satellite (or UAS platform) can connect to a gateway via a feeder link. The satellite can connect to a data network via a gateway. Beam footprint can mean the area from which signals transmitted by the satellite can be received. Referring to Figure 4, the satellite (or UAS platform) can generate a service link with the UE. A satellite (or UAS platform) connected to a UE can connect to other satellites (or UAS platforms) via ISLs (inter-satellite links). Other satellites (or UAS platforms) can connect to gateways via feeder links. Based on the regenerated payload, the satellite can connect to the data network via gateways with other satellites. If an ISL does not exist between satellites, a feeder link may be required between the satellite and the gateway. Figures 3 and 4 are merely examples of NTN scenarios, and NTN can implement various scenarios.For example, a satellite (or UAS platform) can implement a transparent or regenerative (with onboard processing) payload. For example, a satellite (or UAS platform) can generate various beams over a specified service area depending on the satellite's (or UAS platform's) field of view. For example, the satellite's (or UAS platform's) field of view may vary depending on the onboard antenna diagram and the elevation angle. For example, a transparent payload may include radio frequency filtering, frequency conversion, and amplification. Therefore, the waveform signal repeated by the payload may not be altered. For example, a regenerative payload may include radio frequency filtering, frequency conversion, and amplification, demodulation / decoding, switching and / or routing, coding / modulation. For example, a regenerative payload is substantially the same as mounting all or part of the base station functions on a satellite (or UAS platform).

[0053] - Integrated Sensing and Communication (ISAC): Wireless sensing is a technology that uses radio frequencies to determine the instantaneous linear velocity, angle, distance (range), etc., of an object, thereby obtaining information about the characteristics of the environment and / or objects within that environment. Because wireless frequency sensing does not require connection to an object via a device in the network, it can provide a service for determining object location without any device. The ability to obtain range, velocity, and angle information from wireless frequency signals can provide a wide range of new functions such as various object sensing, object recognition (e.g., vehicles, people, animals, UAVs), and high-precision location determination, tracking, and activity recognition. Wireless sensing services can provide information to various industries (e.g., unmanned aerial vehicles, smart homes, V2X, factories, railways, public safety, etc.) enabling applications such as intruder detection, control and navigation of auxiliary vehicles, trajectory tracking, collision avoidance, traffic management, and health and traffic management. In some cases, wireless sensing can use non-3GPP type sensors (e.g., radar, cameras) to further support 3GPP (registered trademark; hereafter the same) based sensing. For example, the operation of a wireless sensing service, i.e., sensing operation, can depend on the transmission, reflection, and scattering of wireless sensing signals. Therefore, wireless sensing can provide an opportunity to enhance existing communication systems with wireless and sensing networks in communication networks. Figure 5 shows an example of sensing operation according to one embodiment of the present disclosure. The embodiment of Figure 5 can be combined with various embodiments of the present disclosure. Specifically, Figure 5(a) shows an example of sensing using a sensing receiver and sensing transmitter located in the same position (e.g., monostatic sensing), and Figure 5(b) shows an example of sensing using a separated sensing receiver and sensing transmitter (e.g., bistatic sensing).

[0054] The layers of the Radio Interface Protocol (RRC) between a terminal and a network can be divided into L1 (Layer 1), L2 (Layer 2), and L3 (Layer 3) based on the three lower layers of the Open System Interconnection (OSI) standard model, which is widely known in communication systems. Of these, the physical layer, which belongs to Layer 1, provides information transfer services using physical channels, while the RRC (Radio Resource Control) layer, located in Layer 3, plays the role of controlling radio resources between the terminal and the network. To this end, the RRC layer exchanges RRC messages between the terminal and the base station.

[0055] The physical layer provides information transfer services to higher layers using physical channels. The physical layer is connected to the higher layer, the MAC (Medium Access Control) layer, via transport channels. Data moves between the MAC layer and the physical layer via these transport channels. Transport channels are classified according to how and with what characteristics data is transmitted via the wireless interface.

[0056] Data travels between different physical layers, i.e., between the physical layers of the transmitter and receiver, via a physical channel. This physical channel can be modulated using the OFDM (Orthogonal Frequency Division Multiplexing) method, utilizing time and frequency as wireless resources.

[0057] The MAC layer provides services to the higher-level RLC (radio link control) layer via logical channels. The MAC layer provides mapping functionality from multiple logical channels to multiple transport channels. Furthermore, the MAC layer provides logical channel multiplexing functionality through mapping from multiple logical channels to a single transport channel. The MAC sub-layer provides data transfer services on logical channels.

[0058] The RLC hierarchy performs concatenation, segmentation, and reassembly of RLC SDUs (Service Data Units). To ensure the diverse Quality of Service (QoS) requirements of radio bearers (RBs), the RLC hierarchy provides three operating modes: Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM). AM RLC provides error correction via ARQ (automatic repeat request).

[0059] The RRC (Radio Resource Control) layer is defined only in the control plane. The RRC layer is responsible for controlling logical channels, transmit channels, and physical channels in relation to the configuration, reconfiguration, and release of radio bearers. RB refers to the logical path provided by the first layer (physical layer or PHY layer) and the second layer (MAC layer, RLC layer, PDCP (Packet Data Convergence Protocol) layer, SDAP (Service Data Adaptation Protocol) layer) for data transmission between the terminal and the network.

[0060] The functions of the PDCP hierarchy on the user plane include the transmission of user data, header compression, and encryption. The functions of the PDCP hierarchy on the control plane include the transmission of control plane data and encryption / integrity protection.

[0061] The SDAP (Service Data Adaptation Protocol) layer is defined only at the user level. The SDAP layer performs tasks such as mapping QoS flows to data radio bearers and marking QoS flow identifiers (IDs) in downlink and uplink packets.

[0062] Setting up a Radio Bearing (RB) refers to the process of defining the characteristics of the radio protocol hierarchy and channel in order to provide a specific service, and setting the specific parameters and operating methods for each. Furthermore, RBs are divided into two types: SRB (Signaling Radio Bearer) and DRB (Data Radio Bearer). The SRB is used as a channel for transmitting RRC messages in the control plane, while the DRB is used as a channel for transmitting user data in the user plane.

[0063] When an RRC connection is established between the terminal's RRC layer and the base station's RRC layer, the terminal enters the RRC_CONNECTED state; otherwise, it enters the RRC_IDLE state. In the case of NR, an additional RRC_INACTIVE state is defined, in which a terminal in the RRC_INACTIVE state can maintain its connection with the core network and release its connection with the base station.

[0064] Downlink transport channels, which transmit data from the network to terminals, include BCH (Broadcast Channel) for transmitting system information and Downlink SCH (Shared Channel) for transmitting user traffic and control messages. Downlink multicast or broadcast service traffic or control messages can be transmitted via Downlink SCH or via a separate Downlink MCH (Multicast Channel). On the other hand, uplink transport channels, which transmit data from terminals to the network, include RACH (Random Access Channel) for transmitting initial control messages and Uplink SCH (Shared Channel) for transmitting user traffic and control messages.

[0065] Above the transport channel level, logical channels mapped to the transport channel include BCCH (Broadcast Control Channel), PCCH (Paging Control Channel), CCCH (Common Control Channel), MCCH (Multicast Control Channel), and MTCH (Multicast Traffic Channel).

[0066] Radio frames can be used for uplink and downlink transmissions. A radio frame has a length of 10ms and can be defined as two 5ms half-frames (HF). A half-frame can contain five 1ms subframes (SF). A subframe can be divided into one or more slots, and the number of slots within a subframe can be determined by the subcarrier spacing (SCS). Each slot can contain 12 or 14 OFDM(A) symbols by a cyclic prefix (CP).

[0067] When normal CP is used, each slot can contain 14 symbols. When extended CP is used, each slot can contain 12 symbols. Here, symbols can include OFDM symbols (or CP-OFDM symbols), SC-FDMA (Single Carrier-FDMA) symbols (or DFT-s-OFDM (Discrete Fourier Transform-spread-OFDM) symbols).

[0068] Table 2 below shows the number of symbols per slot (N) depending on the SCS setting (u) when a normal CP or extended CP is used. slot symb ), number of slots per frame (N frame,u slot ) and the number of slots per subframe (N subframe,u slot ) is an example.

[0069] [Table 2]

[0070] Figure 6 shows a frame slot structure according to one embodiment of the present disclosure. The embodiment in Figure 6 can be combined with various embodiments of the present disclosure.

[0071] Referring to Figure 6, a slot contains multiple symbols in the time domain. A carrier wave contains multiple subcarriers in the frequency domain. An RB (Resource Block) can be defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. A BWP (Bandwidth Part) can be defined as multiple consecutive (P)RBs ((Physical)Resource Blocks) in the frequency domain and can correspond to a single numerology (e.g., SCS, CP length, etc.). A carrier wave can contain up to N (e.g., 5) BWPs. Data communication can be performed via activated BWPs. Each element is called a Resource Element (RE) in the resource grid and can be mapped to a single complex symbol.

[0072] A Bandwidth Part (BWP) is a contiguous set of Physical Resource Blocks (PRBs) for a given numerology. PRBs can be selected from a contiguous subset of Common Resource Blocks (CRBs) for a given numerology on a given carrier.

[0073] Figure 7 shows an example of a BWP according to one embodiment of the present disclosure. The embodiment in Figure 7 can be combined with various embodiments of the present disclosure. In the embodiment of Figure 7, it is assumed that there are three BWPs.

[0074] Referring to Figure 7, the CRB (common resource block) is a carrier resource block numbered from one end of the carrier band to the other. The PRB is a resource block numbered within each BWP. Point A can indicate a common reference point for the resource block grid.

[0075] BWP is point A, offset (N) from point A.start BWP ) and bandwidth (N size BWP ) can be set thereby. For example, point A is an external reference point of the PRB of the carrier where sub-carrier 0 of all numerologies (e.g., all numerologies supported by the network in the corresponding carrier) is aligned. For example, the offset is the PRB interval between the lowest sub-carrier and point A in a given numerology. For example, the bandwidth is the number of PRBs in a given numerology.

[0076] The SLSS (Sidelink Synchronization Signal) is a sidelink (SL)-specific sequence and can include a PSSS (Primary Sidelink Synchronization Signal) and an SSSS (Secondary Sidelink Synchronization Signal). The PSSS can be referred to as S-PSS (Sidelink Primary Synchronization Signal), and the SSSS can be referred to as S-SSS (Sidelink Secondary Synchronization Signal). For example, length-127 M-sequences can be used for the S-PSS, and length-127 Gold sequences can be used for the S-SSS. For example, a terminal can use the S-PSS to detect an initial signal and acquire synchronization. For example, a terminal can use the S-PSS and S-SSS to acquire detailed synchronization and detect a synchronization signal ID.

[0077] The PSBCH (Physical Sidelink Broadcast Channel) is a broadcast channel that transmits fundamental (system) information that terminals should know first before transmitting or receiving SL signals. For example, this fundamental information includes information related to SLSS, duplex mode (DM), TDDUL / DL (Time Division Duplex Uplink / Downlink) configuration, resource pool-related information, application types related to SLSS, subframe offset, and broadcast information. For example, to evaluate PSBCH performance, in NR V2X, the size of the PSBCH payload is 56 bits, including a 24-bit CRC (Cyclic Redundancy Check).

[0078] S-PSS, S-SSS, and PSBCH can be included in a block format that supports periodic transmission (e.g., an SLSS (Synchronization Signal) / PSBCH block, hereinafter referred to as S-SSB (Sidelink-Synchronization Signal Block)). The S-SSB can have the same numerology (i.e., SCS and CP lengths) as the PSCCH (Physical Sidelink Control Channel) / PSSCH (Physical Sidelink Shared Channel) in the carrier, and its transmission bandwidth is within a (pre-configured) Sidelink Bandwidth Part (SL BWP). For example, the bandwidth of the S-SSB is 11RB (Resource Block). For example, the PSBCH spans 11RB. The frequency position of the S-SSB can be (pre-configured). Therefore, the terminal does not need to perform hypothesis detection on frequency to find the S-SSB in the carrier.

[0079] For example, a terminal can generate an S-SS / PSBCH block (i.e., S-SSB), and the terminal can map the S-SS / PSBCH block (i.e., S-SSB) onto a physical resource and transmit it. For example, the time-frequency structure of an S-SS / PSBCH block is as follows:

[0080] In the time domain, the S-SS / PSBCH block is N S-SSB symb It can consist of 0 to N OFDM symbols within an S-SS / PSBCH block. S-SSB symb Numbers can be specified in ascending order up to -1, where PSBCH containing S-PSS, S-SSS, and associated DM-RS can be mapped to the symbols given in Table 3. The number of OFDM symbols in an S-SS / PSBCH block is N in the case of a normal cyclic prefix. S-SSB symb = 13, and in the case of an extended cyclic prefix, N S-SSB symb =11 is possible. In the S-SS / PSBCH block, the first OFDM symbol can be the first OFDM symbol in the slot.

[0081] In the frequency domain, an S-SS / PSBCH block can consist of 132 consecutive subcarriers, each assigned a subcarrier number from 0 to 131 in ascending order within a sidelink S-SS / PSBCH block. Both k and l can represent the frequency and time index within a single sidelink S-SS / PSBCH block, respectively.

[0082] [Table 3]

[0083] In this specification, PSCCH can be replaced with control channels, physical control channels, control channels associated with side links, physical control channels associated with side links, etc. In this specification, PSSCH can be replaced with shared channels, physical shared channels, shared channels associated with side links, physical shared channels associated with side links, etc.

[0084] Figure 8 illustrates a procedure in which a terminal performs V2X or SL communication according to a resource allocation mode, according to one embodiment of the present disclosure. The embodiment in Figure 8 can be combined with various embodiments of the present disclosure.

[0085] Referring to Figure 8(a), in resource allocation mode 1, the base station can schedule SL resources to be used by the terminal for SL transmission. For example, in step S800, the base station can transmit information related to the SL resources and / or information related to the UL resources to the first terminal. For example, the UL resources may include PUCCH resources and / or PUSCH resources. For example, the UL resources may be resources for reporting SL HARQ feedback to the base station.

[0086] For example, the first terminal can receive from the base station information related to a DG (dynamic grant) resource and / or information related to a CG (configured grant) resource. For example, a CG resource may include a CG type 1 resource or a CG type 2 resource. In this specification, a DG resource may be a resource that the base station configures / assigns to the first terminal via DCI (downlink control information). In this specification, a CG resource may be a (periodic) resource that the base station configures / assigns to the first terminal via DCI and / or RRC messages. For example, in the case of a CG type 1 resource, the base station may send an RRC message containing information related to the CG resource to the first terminal. For example, in the case of a CG type 2 resource, the base station may send an RRC message containing information related to the CG resource to the first terminal, and the base station may send DCI related to the activation or release of the CG resource to the first terminal.

[0087] In step S810, the first terminal can transmit a PSCCH (e.g., SCI (Sidelink Control Information) or 1st-stage SCI) to the second terminal based on the resource scheduling. In step S820, the first terminal can transmit a PSSCH (e.g., 2nd-stage SCI, MAC PDU, data, etc.) associated with the PSCCH to the second terminal. In step S830, the first terminal can receive a PSFCH associated with the PSCCH / PSSCH from the second terminal. For example, HARQ feedback information (e.g., NACK information or ACK information) can be received from the second terminal via the PSFCH. In step S840, the first terminal can transmit / report the HARQ feedback information to the base station via PUCCH or PUSCH. For example, the HARQ feedback information reported to the base station may be information generated by the first terminal based on the HARQ feedback information received from the second terminal. For example, the HARQ feedback information reported to the base station may be information generated by the first terminal based on pre-configured rules. For example, the DCI may be a DCI for scheduling SLs.

[0088] Referring to Figure 8(b), in resource allocation mode 2, the terminal can determine an SL transmission resource from the SL resources set by the base station / network or from the pre-configured SL resources. For example, the set SL resources or pre-configured SL resources may be a resource pool. For example, the terminal can autonomously select or schedule resources for SL transmission. For example, the terminal can select resources itself from the configured resource pool and perform SL communication. For example, the terminal can perform sensing and resource (re)selection procedures and select resources itself within the selection window. For example, the sensing may be performed in units of subchannels. For example, in step S810, the first terminal that has selected resources itself from the resource pool can use those resources to send PSCCH (e.g., SCI (Sidelink Control Information) or 1 st -stage SCI) can be transmitted to the second terminal. In step S820, the first terminal transmits a PSSCH (e.g., 2) associated with the PSCCH. nd -Stage SCI, MAC PDU, data, etc. can be transmitted to the second terminal. In step S830, the first terminal can receive the PSFCH associated with the PSCCH / PSSCH from the second terminal.

[0089] Referring to Figure 8(a) or (b), for example, the first terminal can transmit an SCI over the PSCCH to the second terminal. Alternatively, for example, the first terminal can transmit two consecutive SCIs (e.g., a 2-stage SCI) over the PSCCH and / or PSSCH to the second terminal. In this case, the second terminal can decode the two consecutive SCIs (e.g., a 2-stage SCI) to receive the PSSCH from the first terminal. In this specification, an SCI transmitted over the PSCCH is 1 st SCI, 1st SCI, 1 st -stage SCI or 1 st -Stage SCI format, which can be called the SCI format, is transmitted over PSSCH. nd SCI, 2nd SCI, 2 nd-stage SCI or 2 nd - This can be called the stage SCI format.

[0090] For example, 1 st -stage SCI format can include SCI format 1-A and / or SCI format 1-B, 2 nd -stage SCI formats may include SCI format 2-A, SCI format 2-B, SCI format 2-C and / or SCI format 2-D.

[0091] The following is an example of SCI format 1-A.

[0092] SCI format 1-A is PSSCH and 2 on PSSCH nd - Used for scheduling SCI stages.

[0093] The following information will be transmitted using SCI Format 1-A.

[0094] -Priority-3 bits

[0095] -Frequency resource allocation- If the value of the higher-level parameter sl-MaxNumPerReserve is set to 2, ceiling(log2(N SL subChannel (N SL subChannel +1) / 2)) bits; otherwise, if the value of the higher-level parameter sl-MaxNumPerReserve is set to 3, ceiling log2(N SL subChannel (N SL subChannel +1)(2N SL subChannel +1) / 6) bits

[0096] -Time resource allocation- 5 bits if the value of the higher-level parameter sl-MaxNumPerReserve is set to 2; otherwise, 9 bits if the value of the higher-level parameter sl-MaxNumPerReserve is set to 3.

[0097] -Resource reservation cycle -ceiling(log2N rsv_period ) bits, where N rsv_period This is the number of entries in the higher-level parameter sl-ResourceReservePeriodList if the higher-level parameter sl-MultiReserveResource is set; otherwise, 0 bits.

[0098] -DMRS pattern-ceiling(log2N) pattern ) bits, where N pattern This is the number of DMRS patterns set by the higher-level parameter sl-PSSCH-DMRS-TimePatternList.

[0099] -2 nd -stage SCI format-2bit

[0100] -Beta_OffsetIndicator- 2 bits as provided by the higher-level parameter sl-BetaOffsets2ndSCI

[0101] - Number of DMRS ports - 1 bit

[0102] -Modulation and coding method- 5-bit

[0103] - Additional MCS Table Indicator - 1 bit if one MCS table is set by the higher-level parameter sl-Additional-MCS-Table; 2 bits if two MCS tables are set by the higher-level parameter sl-Additional-MCS-Table; 0 bits otherwise.

[0104] -PSFCH overhead indicator- If the upper-level parameter sl-PSFCH-Period=2 or 4, it is 1 bit; otherwise, it is 0 bits.

[0105] -Reserved bits- The number of bits determined by the higher-level parameter sl-NumReservedBits, and the value is set to 0.

[0106] The following is an example of SCI format 2-A.

[0107] In HARQ operation, if the HARQ-ACK information contains either an ACK or a NACK, or if the HARQ-ACK information contains only a NACK, or if there is no feedback of the HARQ-ACK information, SCI format 2-A is used for decoding the PSSCH.

[0108] The following information will be transmitted via SCI Format 2-A.

[0109] -HARQ process number-4 bits

[0110] - New data indicator - 1 bit

[0111] -Redundancy version-2 bits

[0112] -Source ID-8bit

[0113] - Destination ID - 16 bits

[0114] -HARQ Feedback Activation / Deactivation Indicator - 1 bit

[0115] -Cast type indicator- 2 bits as defined in Table 4

[0116] -CSI Request-1 bit

[0117] [Table 4]

[0118] The following is an example of SCI format 2-B.

[0119] In HARQ operation, if the HARQ-ACK information contains only NACK, or if there is no feedback of HARQ-ACK information, SCI format 2-B is used for PSSCH decoding.

[0120] The following information will be transmitted via SCI Format 2-B.

[0121] -HARQ process number-4 bits

[0122] - New data indicator - 1 bit

[0123] -Redundancy version-2 bits

[0124] -Source ID-8bit

[0125] - Destination ID - 16 bits

[0126] -HARQ Feedback Activation / Deactivation Indicator - 1 bit

[0127] - Zone ID - 12 bits

[0128] -Communication Range Requirements- 4 bits determined by the higher-level parameter sl-ZoneConfigMCR-Index

[0129] Referring to Figure 8(a) or (b), in step S830, the first terminal can receive the PSFCH. For example, the first and second terminals can determine the PSFCH resource, and the second terminal can use the PSFCH resource to send HARQ feedback to the first terminal.

[0130] Referring to Figure 8(a), in step S840, the first terminal can transmit SL HARQ feedback to the base station via PUCCH and / or PUSCH.

[0131] The following explains the HARQ (Hybrid Automatic Repeat Request) procedure.

[0132] For example, SL HARQ feedback can be enabled for unicasts. For example, SL HARQ feedback can be enabled for groupcasts. For example, two HARQ feedback options can be supported for groupcasts.

[0133] (1) Group cast option 1: If the receiving terminal fails to decode the transmission block associated with the PSCCH after it has decoded the PSCCH targeting the receiving terminal, the receiving terminal may send a NACK (negative acknowledgement) to the transmitting terminal via the PSFCH. On the other hand, if the receiving terminal decodes the PSCCH targeting the receiving terminal and successfully decodes the transmission block associated with the PSCCH, the receiving terminal may not send an ACK (positive acknowledgement) to the transmitting terminal.

[0134] (2) Group cast option 2: If the receiving terminal fails to decode the transmission block associated with the PSCCH after it has decoded the PSCCH targeting the receiving terminal, the receiving terminal may send a NACK to the transmitting terminal via the PSFCH. If the receiving terminal decodes the PSCCH targeting the receiving terminal and successfully decodes the transmission block associated with the PSCCH, the receiving terminal may send an ACK to the transmitting terminal via the PSFCH.

[0135] The following describes the UE procedure for reporting HARQ-ACK via sidelinks.

[0136] In response to receiving a PSSCH, the UE sends a PSFCH containing HARQ-ACK information. PSSCH subch The SCI format can be used to schedule PSSCH reception on one or more subchannels from a given subchannel. The UE provides HARQ-ACK information containing ACK, NACK, or NACK only.

[0137] The UE can receive the number of slots in the resource pool for PSFCH transmission occasion resources via sl-PSFCH-Period-r16. If the number is 0, PSFCH transmission from the UE is disabled in the resource pool. The UE is k mod N PSFCH PSSCH If = 0, slot t' k SL (0≦k <T’ max ) is expected to have PSFCH transmission opportunity resources, and here, t' k SL is a slot belonging to the resource pool, and T' max This is the number of slots belonging to the resource pool within 10240 msec, and N PSFCH PSSCHThis is provided in sl-PSFCH-Period-r16. The UE may be instructed by a higher level not to transmit a PSFCH in response to a PSSCH reception. If the UE receives a PSSCH in the resource pool and the HARQ feedback enabled / disallowed indicator field in the associated SCI format 2-A or SCI format 2-B has a value of 1, the UE provides HARQ-ACK information via a PSFCH transmission in the resource pool. The UE transmits a PSFCH in a first slot, where the first slot is a slot after the minimum number of slots provided by sl-MinTimeGapPSFCH-r16 in the resource pool that contains the PSFCH resource and has received the PSSCH since the last slot.

[0138] UE is a set of PRBs in the resource pool for PSFCH transmission with PRB in the resource pool. PSFCH PRB、set The subchannels are provided by sl-PSFCH-RB-Set-r16. The number of subchannels N for the resource pool provided by sl-NumSubchannel subch and N PSFCH PSSCH For a number of PSSCH slots associated with a smaller or the same PSFCH slot, the UE is M PRB、set PSFCH Among PRB [(i+j·N PSFCH PSSCH )·M PSFCH subch、slot 、(i+1+j·N PSFCH PSSCH )·M PSFCH subch、slot -1] PRB is assigned to slot i and subchannel j of the PSSCH slot which is linked to the PSFCH slot. Here, M PSFCH subch、slot =M PSFCH PRB、set / (N subch ·N PSFCH PSSCH ), 0≦i <N PSFCH PSSCH , 0≦j <N subchand the allocation starts from the ascending order of i and continues with the ascending order of j. The UE expects that M PSFCH PRB、set is a multiple of N subch ·N PSFCH PSSCH .

[0139] The UE determines R PSFCH PRB、CS =N PSFCH type ·M PSFCH subch、slot ·N PSFCH CS to be the number of PSFCH resources available for multiplexing the HARQ-ACK information included in the PSFCH transmission. Here, N PSFCH CS is the number of cyclic shift pairs for the resource pool and, based on the indication from the upper layer,

[0140] -N PSFCH type = 1 and M PSFCH subch、slot PRB is related to the start subchannel of the corresponding PSSCH,

[0141] -N PSFCH type =N PSSCH subch and N PSSCH subch ·M PSFCH subch、slot PRB is related to one or more subchannels among the N PSSCH subch subchannels of the corresponding PSSCH.

[0142] The PSFCH resources are first indexed in ascending order of the PRB index among N PSFCH type ·M PSFCH subch、slot PRBs, and then indexed in ascending order of the cyclic shift pair index among N PSFCH CS cyclic shift pairs.

[0143] The UE, in response to PSSCH reception, provides an index of the PSFCH resource for PSFCH transmission (P ID +M ID ) mod R PSFCH PRB、CS This is the decision. Here, P ID This is the physical hierarchy source ID provided by SCI format 2-A or 2-B for scheduling PSSCH reception, and M ID This is the ID of the UE that receives the PSSCH indicated in the higher layer if the UE detects SCI format 2-A with a cast type indicator field value of "01", otherwise M ID It is 0.

[0144] UE uses Table 5 for N PSFCH CS The m0 value is determined for calculating the cyclic shift α value from the cyclic shift pair index corresponding to the PSFCH resource index.

[0145] [Table 5]

[0146] The UE applies one of the cyclic shift pairs to the sequence used for PSFCH transmission.

[0147] The following describes the UE procedure for determining the subset of resources reported to the upper layer in PSSCH resource selection in Sidelink Resource Allocation Mode 2.

[0148] In resource allocation mode 2, the upper layer can request the UE to determine a subset of resources, which the upper layer will select for PSSCH / PSCCH transmission. To trigger this procedure, in slot n, the upper layer provides the following parameters for the PSSCH / PSCCH transmission:

[0149] - Resource pools from which resources are reported;

[0150] -L1 priority, prio TX ;

[0151] - Remaining PDB (packet delay budget);

[0152] - Number of subchannels used for PSSCH / PSCCH transmission within a slot L subCH ;

[0153] - Selectively, resource reservation interval P in milliseconds. rsvpTX

[0154] -If the upper layer requests the UE to determine a subset of resources to select for PSSCH / PSCCH transmission as part of a re-evaluation or pre-emption procedure, the upper layer provides the set of resources to be re-evaluated (r0,r1,r2,...) and the set of resources to be pre-empted (r'0,r'1,r'2,...).

[0155] -Slot r i Determining the subset of resources requested by layers above or after T3 depends on the UE implementation. Here, r i '' is the slot with the smallest slot index among (r0,r1,r2,...) and (r'0,r'1,r'2,...), and T3 is T SL proc,1 As stated above. Here T SL proc,1 μ is defined as the number of slots related to the SCS, where μ SL This is the SCS configuration for SL BWP.

[0156] The following higher-level parameters affect this procedure:

[0157] -sl-SelectionWindowList: Internal parameter T 2min The given prio TX The value is set as the corresponding value from the higher-level parameter sl-SelectionWindowList.

[0158] -sl-Thres-RSRP-List: This upper layer parameter is for each (p i ,p j ) Provides an RSRP threshold for the combination. Here p i p is the priority field value included in the received SCI format 1-A. j This is the transmission priority on the resource selected by the UE; in this procedure, p j =prio TX That is the case.

[0159] -sl-RS-ForSensing selects whether the UE uses PSSCH-RSRP or PSCCH-RSRP measurement.

[0160] -sl-ResourceReservePeriodList

[0161] -sl-SensingWindow: The internal parameter T0 is defined as the number of slots corresponding to sl-SensingWindow msec.

[0162] -sl-TxPercentageList: given prio TX The internal parameter X for is converted from a percentage to a ratio (sl-TxPercentageList(prio) TX ) is defined as.

[0163] -sl-PreemptionEnable: If sl-PreemptionEnable is not provided and is not enabled, the internal parameter prio preThis is set to the parameter sl-PreemptionEnable, which is provided by the higher layer.

[0164] If resource reservation interval P rsvp_TX If provided, the resource reservation interval will change from milliseconds to logical slot units P'. rsvp_TX It will be converted.

[0165] Notation:

[0166] (t' SL 0, t' SL 1, t' SL 2,...) indicates a set of slots belonging to the sidelink resource pool.

[0167] For example, UE sets a list of candidate resources (S) based on Tables 6 to 9. A ) can be selected. For example, when resource (re)selection is triggered, the UE selects a set of candidate resources (S) based on Tables 6 to 9. A ) can be selected. For example, if re-evaluation or pre-emption is triggered, the UE will select a set of candidate resources (S) based on Tables 6 to 9. A ) can be selected.

[0168] [Table 6]

[0169] Referring to Table 6, in step 1, the UE can select / determine a time interval (e.g., selection window) for resource selection. In step 2, the UE can select / determine a sensing window and monitor the slots within the sensing window. In step 3, the UE can determine the RSRP threshold. In step 4, the UE can determine S A The set can be initialized.

[0170] [Table 7]

[0171] Referring to Table 7, in step 5, UE is S A In the set, candidate single-slot resources can be eliminated. A If the number of remaining candidate single-slot resources in the set is less than the threshold, the UE is S A The set can be initialized to all candidate single-slot resource sets as in step 4.

[0172] [Table 8]

[0173] Referring to Table 8, in step 6, UE is S A In the set, candidate single-slot resources can be eliminated. In step 7, S A If the number of remaining candidate single-slot resources in the set is less than the threshold, the UE can increase the RSRP threshold by 3dB, and the procedure can continue from step 4.

[0174] [Table 9]

[0175] Referring to Table 9, UE is S A The set can be reported to higher levels. For example, if re-evaluation or pre-emption is triggered, the UE can report the resources to be re-evaluated or pre-empted based on Table 9.

[0176] On the other hand, in the next-generation system, terminals may be permitted to transmit and / or receive sidelink channels / signals based on different RATs (e.g., LTE and / or NR) within a single carrier or cell. In embodiments of this disclosure, the above situation can be extended to apply when a terminal performs multiple different RAT-based sidelink transmit / receive operations simultaneously on a single RF device and / or BB (baseband) device. On the other hand, the RAT may differ in the waveform and / or signal generation method and / or DC (direct current) position and / or SCS (subcarrier spacing) and / or subcarrier offset and / or CP length for sidelink transmit / receive or transmit / receive to PSCCH and / or PSSCH. More specifically, in the case of an LTE sidelink, the SC-FDMA or DFT-PRECODED OFDM method may be used, the SCS may be 15 kHz, the DC position may have a 7.5 kHz subcarrier offset at the center of the system bandwidth, and the CP length may allow normal CP and extended CP. On the other hand, in the case of NR sidelinks, OFDM or CP-OFDM methods can be used, SCS can be 15kHz, 30kHz, 60kHz, 120kHz, etc. depending on the (pre)configuration, DC position can be a specific subcarrier position within the SL BWP or RB grid or a specific position outside the SL BWP or RB grid depending on the (pre)configuration, subcarrier offset can be +7.5kHz, 0kHz, -7.5kHz depending on the (pre)configuration, and normal CP length is supported, with extended CP supported only when SCS is 60kHz. In addition, in the case of LTE sidelinks, all symbols in a subframe or slot are in a format usable for SL communication, whereas in the case of NR sidelinks, only the symbol interval from the start SL symbol index (hereinafter referred to as SL_SYMBOL_START) set in the (pre)configuration to the number of SL symbols in the slot (hereinafter referred to as SL_SYMBOL_LENGTH) may be in a format usable for SL communication.

[0177] On the other hand, if LTE subframes and NR slots overlap, an AGC (automatic gain control) problem can occur due to PSFCH transmission and reception on the NR slot. Specifically, for example, if a terminal performs AGC on the first symbol in an LTE SL subframe, and PSFCH transmission and reception occurs in the NR SL slot, the overall received power will suddenly increase (exceeding the maximum received power set by AGC), which may cause some signals to be clipped.

[0178] Figure 9 shows an example of an AGC problem that occurs for NR PSFCH transmission and reception. Referring to Figure 9, if a terminal that has already performed AGC for LTE SL reception performs additional NR PSFCH reception during LTE SL reception, some signals may exceed the maximum receive power set by the AGC. As a result, some signals are clipped. A resource exclusion method for coexistence between different RATs and a device supporting the same, according to various embodiments of this disclosure, will be described. For convenience of explanation, the coexistence of LTE SL and NR SL will be the focus, but the technical ideas of this disclosure are not limited to that. The technical ideas of this disclosure can also be applied when different RAT-based communications coexist.

[0179] For example, when sidelink channel / signal transmission and / or reception operations are performed based on different RATs (e.g., LTE and / or NR) within a single carrier or cell, the terminal needs to avoid resources occupied by LTE SL operations when performing NR SL operations. That is, the terminal can select NR SL transmission resources to avoid resources reserved by LTE SL operations under certain conditions (e.g., when comparing RSRP measurements to an RSRP threshold and the RSRP measurement is higher than the RSRP threshold), taking these resources into consideration. For example, the terminal is provided with all the settings for LTE SL operations (e.g., resource pool settings, information for the carrier, RB grid information, etc.) and NR SL operations (e.g., resource pool settings, SL BWP settings, information for the carrier, RB grid information, DC information, etc.) via (pre)configuration or from the base station. The rationale for this is to perform resource (re)selection based on LTE SCI and / or LTE DCI and / or NR SCI and / or NR DCI.

[0180] For example, if the resource pools for LTE SL operation and NR SL operation overlap, it is necessary to define how the terminal performs mutual resource exclusion procedures when selecting resources. In particular, if the SCS and / or subcarrier offsets differ for LTE SL and NR SL, the mutual RB boundaries may not be aligned, potentially leading to significant interference between adjacent RBs. More specifically, in the above situation, the main lobe and / or side lobes of the waveform may cause high interference by penetrating even when their frequency-side positions do not overlap and they are adjacent in RB grids with relatively small SCSs. Furthermore, if the SCSs differ, there may be multiple NR SL slots that overlap with LTE SL subframes. For convenience, embodiments of this disclosure will describe cases where the boundaries between LTE subframes and NR subframes or slots are aligned / matched or the gap is below a certain level.

[0181] For example, when (re)selecting resources for an NR SL, available resources or transmit-selected resources can be determined to avoid (always, by RSRP measurements, or by a combination of priority values, etc.) reserved resources for an LTE SL and / or scheduled transmit resources for the same terminal for an LTE SL and / or resources related to non-monitored subframes for an LTE SL. For example, the Q value of the LTE SL resource reservation period and / or the number of period repetitions can be used to derive LTE SL periodic resources. For example, the Q value can be determined depending on the location of the SCI receive subframe that indicates the reserved resources for an LTE SL-based LTE SL and / or the location of the hypothetical SCI receive subframe related to the non-monitored subframe and / or the timing of the LTE SL-based resource (re)selection trigger and / or the LTE SL resource reservation period value. For example, when the index (on the physical or logical subframe side) of the location of the SCI received subframe that indicates a reserved resource for LTE SL and / or the location of a virtual SCI received subframe relating to an unmonitored subframe is m, the index (on the physical or logical subframe side) of the location of the LTE SL-based resource (re)selection trigger subframe or the location of a subframe belonging to the resource pool including the said time is n', P_rsvp_RX is the value obtained by dividing the resource reservation period (in msec) by 100, P_step is a constant value relating to the ul-dl-TDD setting, and P_rsvp_RX*P_step is the reference resource reservation value, then, on the LTE SL basis, the P_rsvp_RX value is less than 1, and / or the n'-m value is P_step*P_rsvp_RX(reference LTE If the value is less than or equal to the SL reservation period value, the Q value is the reciprocal of P_rsvp and / or the value obtained by dividing T_scal / 100 by the P_rsvp_RX value and / or the value obtained by dividing T_scal by the reference reservation period value; otherwise, the Q value can be 1.

[0182] For example, the T_scal value is the T_2 value for determining the resource selection window size and / or the final point in the resource selection window for NR SL resource (re)selection (e.g., a value determined by the terminal between the (pre-)set T_2,min and the PDB value for resource (re)selection) and / or the scaling value related to the SCS of NR SL (e.g., 2 u Here, u can be a value obtained by multiplying by or dividing by (a value that is 0 for 15kHz SCS, 1 for 30kHz SCS, and 2 for 60kHz SCS). For example, the T_scal value is a (pre-set) value whose unit may be milliseconds and / or the number of (physical or logical) subframes and / or the number of (physical or logical) slots.

[0183] For example, the Q value can be determined according to the position of the SCI received subframe that indicates a reserved resource for LTE SL based LTE SL and / or the position of a virtual SCI received subframe relating to an unmonitored subframe and / or the position of an NR SL slot that overlaps with the LTE SL subframe and / or the NR SL-based resource (re)selection trigger time and / or the NR SL resource selection window size and / or the T_2 value and / or the LTE SL resource reservation period value.

[0184] For example, m_NR is the index (on the physical or logical slot side) of the NR SL slot that overlaps with the position of the SCI received subframe indicating a reserved resource for LTE SL and / or the position of a virtual SCI received subframe relating to an unmonitored subframe, and / or the earliest of these slots and / or the latest of these slots; n'_NR is the index (on the physical or logical slot side) of the position of the NR SL-based resource (re)selection trigger slot or the position of a slot belonging to the resource pool including the said time; and the P_rsvp_RX*P_step value or P_rsvp_RX*100 or the reference LTE SL reservation cycle value and / or the value obtained by adding or subtracting 1 from the said value and / or 2 uIf the value obtained by adding or subtracting -1 is less than T_scal, and / or if the n'_NR-m_NR value is less than or equal to the value obtained by converting the reference LTE SL reservation period value to the number of logical slots for NR, and / or if the position of the NR SL slot for n'_NR is the same as or later than the position of the NR SL slot that overlaps with the position of the subframe obtained by applying the reference LTE SL reservation period value based on the LTE SL resource pool from the position of the SCI received subframe that indicates the reserved resource for LTE SL and / or the position of the virtual SCI received subframe related to the unmonitored subframe, and / or the position of the earliest slot and / or the latest slot among them, then the Q value is the value obtained by dividing the T_scal value by the reference LTE SL reservation period value and rounding it up; otherwise, the Q value can be 1. For example, if there are multiple NR SL slots that overlap with the subframe positions obtained by applying a reference LTE SL reservation period value based on the LTE SL resource pool from the position of the SCI received subframe that indicates a reserved resource for LTE SL and / or the position of a virtual SCI received subframe relating to an unmonitored subframe, the Q value can be determined to be different for each NR SL slot, and / or if the NR SL slot is at the same time as or later than the NR SL slot position for n'_NR, the Q value is the value obtained by dividing the T_scal value by the reference LTE SL reservation period value and rounding it up, and if the other NR SL slot is earlier than the NR SL slot position for n'_NR, the Q value may be 1.

[0185] For example, an NR SL slot that overlaps with a specific LTE SL subframe can be replaced with an NR SL slot belonging to the slowest NR resource pool prior to the overlapping LTE SL subframe, or an NR SL slot belonging to the fastest NR resource pool after the overlapping LTE SL subframe.

[0186] For example, when a terminal is (re)selecting a resource, if the PSFCH occasions corresponding to periodic resources (related to the transmit resource reservation cycle and / or resource re-selection counter value) for a candidate single-slot resource overlap with LTE SL reserved resources (derived on an LTE SL SCI reception basis), and / or overlap with LTE SL transmit selection resources (of the terminal's LTE SL module), and / or overlap with LTE SL resources related to LTE SL unmonitored subframes (of the terminal's LTE SL module), the terminal may not include the candidate single-slot resource in its available resource set and / or avoid or deprioritize the candidate single-slot resource when selecting a transmit resource. For example, the above operation can be applied only if the RSRP measurement value for an LTE SL reserved resource is equal to or exceeds a specific threshold (a value whose initial value is (pre) set and / or determined according to the priority value of the LTE SL reserved resource and / or the terminal's NR SL transmission priority value), and / or the priority value for the LTE SL reserved resource is equal to or less than the priority value for the PSFCH or the NR SL transmission priority value, and / or the priority value for the LTE SL transmission selection resource is equal to or less than the priority value for the PSFCH or the NR SL transmission priority value, and / or the NR SL transmission priority value is equal to or exceeds a (pre) set threshold, and / or the priority value for the LTE SL reserved resource is equal to or less than a (pre) set threshold, and / or the priority value for the LTE SL transmission selection resource is equal to or less than a (pre) set threshold. For example, the above operation can be applied only if the baseline measurement value for an LTE SL resource related to a subframe that is not monitored by LTE SL is equal to or exceeds a (pre) set threshold. For example, the measurement of the criterion may be an RSSI measurement for the region in which the terminal operates to receive all or part of the LTE SL resources related to subframes that are not monitored by LTE SL.

[0187] For example, if a PSFCH transmission overlaps with an LTE SL transmission selection resource (of the terminal's LTE SL module) and / or with an LTE SL resource related to a subframe that is not monitored by LTE SL (of the terminal's LTE SL module), the terminal may omit the PSFCH transmission. For example, the omission of the PSFCH transmission can be applied when there are no PSCCH / PSSCH transmissions in the same slot and / or when PSCCH / PSSCH transmissions exist and the power level of the PSCCH / PSSCH is lower than the overall PSFCH power level at the time of the PSFCH transmission. For example, the above operation can only be applied when the priority value for the PSFCH is equal to or greater than the priority value of the LTE SL transmission selection resource, and / or the priority value for the PSFCH is equal to or greater than a (pre-set) threshold, and / or the priority value of the LTE SL transmission selection resource is less than or equal to a (pre-set) threshold.

[0188] For example, during resource (re)selection, if a candidate single-slot resource and / or a periodic resource for said resource and / or a PSFCH opportunity corresponding to the candidate single-slot resource and / or a PSFCH opportunity corresponding to said periodic resource overlap with an LTE SLSS and / or LTE PSBCH transmit resource and / or receive resource, the terminal may exclude the candidate single-slot resource from the set of available resources and / or avoid or lower its priority during the terminal's transmit resource selection. For example, the above operation may be applied when the transmit priority value for NR resource (re)selection is less than or equal to the priority value for LTE SLSS and / or LTE PSBCH transmit and / or receive. The basis for this is that, according to the inter-conflict procedure, LTE SLSS and / or LTE PSBCH transmit and / or receive can be omitted. For example, the above operation may be applied when the transmit priority value for NR resource (re)selection is greater than or equal to the priority value for LTE SLSS and / or LTE PSBCH transmit and / or receive. The basis for this is that, in the above case, the NR resource can be omitted. For example, the applicability and method of the above operation may differ depending on whether LTE SLSS and / or LTE PSBCH are transmission resources or reception resources. For example, the above operation can only be applied when the priority value for LTE SLSS and / or LTE PSBCH is less than or equal to a (pre-set) first threshold and / or greater than or equal to a (pre-set) second threshold. For example, the above operation can only be applied when the reference measurement value for LTE SLSS and / or LTE PSBCH is greater than or equal to a (pre-set) threshold. For example, the reference measurement value may be the RSRP and / or LTE SLSS and / or LTE PSBCH subframe and / or frequency domain values ​​measured by the terminal based on previous LTE SLSS and / or LTE PSBCH DMRS reception.

[0189] For example, an NR SL module can use information shared by an LTE SL module, specifically information from the start LTE SL subframe to the end LTE SL subframe. For example, the start LTE SL subframe may not be later than time (n-T_start). For example, n may be the time when the NR module triggers the NR SL resource (re)selection procedure. For example, the selection of T_LTE or T_0 as T_start may depend on the UE implementation. For example, T_0 is as defined in Table 6. For example, T_LTE can be determined by the start time of the LTE SL sensing window. For example, the end LTE SL subframe may not be later than time (nT-T_valid2). For example, T_valid2 may depend on the UE implementation, such as T_valid2 <= 4ms. For example, nT may be the time when the NR SL module knows the shared information.

[0190] For example, the starting point of information for the LTE SL resources used by the NR SL module can be determined based on the value between the T_0 value and the T_LTE value, and / or the maximum, / or minimum, and / or average value between them. In embodiments of this disclosure, the T_0 value can be replaced with a specific value of the NR SL sensing window size (e.g., the number of logical slots / offset value converted based on 1100 msec).

[0191] For example, an NR SL module may exclude an NR SL candidate resource from the available resource set if a PSFCH opportunity linked to that NR SL candidate resource overlaps with an LTE SL reserved resource. For example, this operation may be limited to cases where HARQ-ACK feedback is activated for an SL transmission for resource (re)selection by the NR SL module, or where the SL transmission consists of a logical channel with activated HARQ-ACK feedback. For example, this operation may be applied in step 5 (of Table 7) of the resource (re)selection operation (i.e., determining resources to exclude from the initial available resource set after the initial available resource set has been determined), and / or this operation may be limited to cases where the RSRP measurement for the overlapping LTE SL reserved resource among the NR SL candidate resources(s) is above or exceeds a certain threshold. Here, for example, in the case of the specific threshold, initial values ​​can be (pre)set for each transmission NR priority (e.g., transmission priority for resource (re)selection) and / or reception LTE priority (e.g., priority for LTE SL reserved resources), and / or a boost can be applied depending on the amount of available resources. For example, the NR SL candidate resources (multiple) can be selected all or part of by the terminal implementation.

[0192] Figure 10 shows a method for eliminating resources based on LTE reservation resources and RSRP thresholds that overlap with PSFCH opportunities, according to one embodiment of the present disclosure. The embodiment of Figure 10 can be combined with various embodiments of the present disclosure.

[0193] Referring to Figure 10, the terminal can monitor LTE SCI on LTE subframe A and detect resource reservations on LTE subframe A'. The terminal can also monitor LTE SCI on LTE subframe B and detect resource reservations on LTE subframe B'. In the embodiment of Figure 10, it is assumed that subframes A' and B' overlap with NR PSFCH opportunities in the time domain, the RSRP measured on subframe A is not greater than the RSRP threshold, and the RSRP measured on subframe B is greater than the RSRP threshold. In this case, the terminal can exclude resources associated with PSFCH opportunities overlapping with LTE subframe B' from the available resource set, and may not exclude resources associated with PSFCH opportunities overlapping with LTE subframe A' from the available resource set. In this case, since the resource exclusion operation is performed in step 5 of Table 7, the boost against the RSRP threshold may not be permitted / executed. Here, for example, the RSRP threshold can be determined based on the transmit NR priority (e.g., transmit priority for resource (re)selection) and / or the receive LTE priority (e.g., priority for LTE SL reserved resources).

[0194] For example, the above operation can be applied only if the priority value for overlapping LTE SL reserved resources is less than or equal to a (pre-)set threshold, and / or the priority value for overlapping LTE SL reserved resources is less than or equal to the transmission priority value for NR SL resource (re)selection, and / or the transmission priority value for NR SL resource (re)selection is less than or equal to a (pre-)set threshold, and / or the transmission priority value for NR SL resource (re)selection is greater than or equal to a (pre-)set threshold, and / or the priority for overlapping LTE SL reserved resources is less than or equal to a (pre-)set threshold and at the same time the RSRP measurement value for the overlapping LTE SL reserved resources is greater than or equal to a specific RSRP threshold, and / or the priority value for overlapping LTE SL reserved resources is greater than or equal to the transmission priority value for NR SL resource (re)selection and at the same time the RSRP measurement value for the overlapping LTE SL reserved resources is greater than or equal to a specific RSRP threshold.

[0195] For example, preemption of a resource can be reported to a higher layer if, for a terminal's selected resource, the selected resource overlaps with an LTE SL reserved resource derived based on the LTE module's received LTE SCI, and / or the PSFCH opportunity corresponding to the selected resource overlaps (in time) with an LTE SL reserved resource derived based on the LTE module's received LTE SCI, and / or the RSRP measurement value for the LTE SL reserved resource is equal to or exceeds the (initial or final) RSRP threshold, and / or the conditions for the terminal's NR priority value and the priority value for the LTE SL reserved resource are met. For example, in the conditions for the priority value of the LTE SL reserved resource, if the priority for the LTE SL reserved resource is less than a specific priority threshold, the specific priority threshold can be set separately (in advance) from that for the NR SL reserved resource.

[0196] For example, during resource (re)selection, if a PSFCH resource is (pre)configured in the resource pool for resource (re)selection, and / or if at least one of the available logical channels at the time the terminal triggers resource (re)selection or generates an SL grant is related to / corresponds to AN(ACK / NACK) enable, and / or if at least one of the logical channels of a service of interest to the terminal is related to / corresponds to AN enable, and / or if a PSFCH opportunity corresponding to an NR candidate resource (in time) overlaps with an LTE SL resource, and / or if the RSRP measurement for an LTE reserved resource is equal to or exceeds the RSRP threshold, the terminal can apply / execute an action to exclude the NR candidate resource from the set of available resources based on that. In other words, in the above, the terminal can perform the resource (re)selection process for the overlap between the PSFCH opportunity and the LTE SL resource even if the only logical channel with available data at the time of SL grant generation is for AN disable.

[0197] On the other hand, when a terminal performs resource reselection for initial transmission and / or retransmission, it may be aware of whether or not to activate or deactivate SL HARQ-ACK feedback.

[0198] For example, when a terminal performs resource reselection for initial transmission and / or retransmission, and / or when the terminal is aware of the deactivation of SL HARQ-ACK feedback for said transmission and transmission resources, the terminal may not apply the method for determining the available resource set when the PSFCH opportunity corresponding to the NR candidate resource overlaps (in time) with an LTE SL resource.

[0199] For example, when a terminal performs resource reselection for initial transmission and / or retransmission, and / or when the terminal is aware of the activation of SL HARQ-ACK feedback for the transmission and transmission resources, the terminal can apply a method for determining the available resource set in cases where the PSFCH opportunity corresponding to the NR candidate resource overlaps (in time) with LTE SL resources.

[0200] For example, the moment when the activation of SL HARQ-ACK feedback for the transmission and transmission resources is recognized, or the point in time at which this occurs, may be after the TB or SL grant has been generated and / or after some transmission (e.g., initial transmission) has been performed.

[0201] Embodiments of this disclosure can be applied differently depending on the SCS for NR SL.

[0202] In embodiments of this disclosure, the logical subframe index may be an index that has been re-indexed against a subframeset belonging to a resource pool.

[0203] In embodiments of this disclosure, the logical slot index may be a re-indexed index with respect to a set of slots belonging to a resource pool.

[0204] While the embodiments of this disclosure describe a method for considering LTE SL reserved resources when selecting NR SL resources, the concept of this disclosure can be extended and applied in the opposite way to a method for considering NR SL reserved resources when selecting LTE SL resources.

[0205] While embodiments of this disclosure describe the case where LTE SL and NR SL are operating on the same carrier, the ideas of this disclosure can be extended to environments where other RAT-based SL or V2X are operating with NR SL, or to environments where NR SL using different transmission parameters (e.g., SCS and / or subcarrier offset and / or DC position) are operating simultaneously.

[0206] In embodiments of this disclosure, the resource selection process in NR SL operation may include resource reselection and / or preemption operations. Alternatively, the terminal may perform resource selection, resource reselection, and / or preemption in different ways from those embodiments described above.

[0207] Embodiments of the present disclosure can be applied as combinations such that they differ depending on the SL carrier and / or SL band and / or combination of SL integrated carriers and / or SL band combination. Embodiments of the present disclosure can be applied as combinations such that they differ depending on the form of carrier integration (e.g., contiguous or non-contiguous and / or intra-band or inter-band).

[0208] Embodiments of the present disclosure may differ and / or be (pre-configured) on a per-resource pool and / or per-transmission outside and / or inside the resource pool and / or per-QoS parameter and / or per-CAPC and / or per-SL priority and / or per-SL channel type and / or per-SL BWP and / or per-SL carrier and / or per-congestion control level and / or per-transmit or per-receive operation and / or per-transmit power level and / or per-transmit start time and / or per-cast type and / or per-SL HARQ-ACK feedback activation and / or per-HARQ-ACK feedback option and / or per-transmit attempts for the same information or TB. For example, in embodiments of this disclosure, (pre)configurations can be performed per resource pool and / or per transmission outside and / or inside a resource pool and / or per QoS parameter and / or per SL priority and / or per SL channel type and / or per SL BWP and / or per SL carrier and / or per congestion control level and / or per transmit operation or receive operation and / or per transmit power level and / or per transmit start time and / or per cast type and / or per SL HARQ-ACK feedback activation and / or per HARQ-ACK feedback option and / or per number of transmit attempts for the same information or TB.

[0209] Figure 11 shows a method by which the first device performs wireless communication according to one embodiment of the present disclosure. The embodiment in Figure 11 can be combined with various embodiments of the present disclosure.

[0210] Referring to Figure 11, in step S1110, the first device can acquire information related to the resource pool. In step S1120, the first device can acquire first priority information for sidelink transmission. In step S1130, the first device can receive LTE (long term evolution) SCI (sidelink control information) from the second device, which includes resource reservation information and second priority information. In step S1140, the first device can determine a set of candidate resources for the sidelink transmission. For example, a candidate resource associated with a PSFCH (physical sidelink feedback channel) resource can be excluded from the set of candidate resources for the sidelink transmission based on (i) a PSFCH (physical sidelink feedback channel) resource being set in the resource pool, (ii) an LTE RSRP (reference signal received power) value measured based on the LTE SCI being greater than an RSRP threshold determined based on the first priority information and the second priority information, and (iii) the PSFCH slot overlapping with an LTE subframe determined based on the resource reservation information.

[0211] For example, the first priority information may be priority information for NR sidelink communication, and the second priority information may be priority information for LTE sidelink communication.

[0212] For example, the PSFCH slot may overlap in the time domain with the LTE subframe determined based on the resource reservation information.

[0213] For example, (i) the PSFCH resource is set in the resource pool, (ii) the LTE RSRP value measured based on the LTE SCI is not greater than the RSRP threshold determined based on the first priority information and the second priority information, and (iii) based on the PSFCH slot overlapping with the LTE subframe determined based on the resource reservation information, the candidate resource related to the PSFCH slot can be included in the set of candidate resources for the sidelink transmission.

[0214] For example, boosting for the RSRP threshold may not be permitted.

[0215] For example, based on the number of remaining candidate resources in the set of candidate resources being smaller than a threshold, the RSRP threshold may not increase.

[0216] For example, the periodic reservation resources related to the LTE SCI can be determined based on the resource reservation information and the Q value. Further, for example, the first device can determine a selection window based on the remaining packet delay budget related to the sidelink transmission. For example, the Q value can be obtained based on the value obtained by dividing the size of the selection window by the product of the resource reservation information and 100. For example, the number of periodic reservation resources related to the LTE SCI can be Q.

[0217] Further, for example, the first device can select resources for PSCCH (physical sidelink control channel) transmission and PSSCH (physical sidelink shared channel) transmission within the set of candidate resources.

[0218] The proposed method can be applied to devices according to various embodiments of this disclosure. First, the processor 102 of the first device 100 can acquire information related to the resource pool. The processor 102 of the first device 100 can acquire first priority information for sidelink transmission. The processor 102 of the first device 100 can control the transceiver 106 to receive LTE (long term evolution) SCI (sidelink control information) including resource reservation information and second priority information from the second device. The processor 102 of the first device 100 can determine a set of candidate resources for the sidelink transmission. For example, a candidate resource associated with a PSFCH slot can be excluded from the set of candidate resources for the sidelink transmission based on (i) a PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) the LTE RSRP (reference signal received power) value measured based on the LTE SCI is greater than the RSRP threshold determined based on the first priority information and the second priority information, and (iii) the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information.

[0219] For example, the candidate resource associated with the PSFCH slot may be included in the set of candidate resources for the sidelink transmission on the basis that (i) the PSFCH resource is set in the resource pool, (ii) the LTE RSRP value measured based on the LTE SCI is not greater than the RSRP threshold determined based on the first priority information and the second priority information, and (iii) the PSFCH slot overlaps with the LTE subframe determined based on the resource reservation information.

[0220] A first device configured to perform wireless communication according to an embodiment of the present disclosure is provided. For example, the first device may include at least one transceiver; at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, based on being executed by the at least one processor, the instructions cause the first device to: obtain information related to a resource pool; obtain first priority information for sidelink transmission; receive, from a second device, LTE (long term evolution) SCI (sidelink control information) including resource reservation information and second priority information; and determine a set of candidate resources for the sidelink transmission. For example, (i) a PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) an LTE RSRP (reference signal received power) value measured based on the LTE SCI is greater than an RSRP threshold determined based on the first priority information and the second priority information, and (iii) a PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information, based on which, candidate resources related to the PSFCH slot can be excluded from the set of candidate resources for the sidelink transmission.

[0221] For example, (i) the PSFCH resource is set in the resource pool, (ii) the LTE RSRP value measured based on the LTE SCI is not greater than the RSRP threshold determined based on the first priority information and the second priority information, and (iii) the PSFCH slot overlaps with the LTE subframe determined based on the resource reservation information, based on which, candidate resources related to the PSFCH slot can be included in the set of candidate resources for the sidelink transmission.

[0222] A processing unit configured to control a first device is provided according to one embodiment of the present disclosure. For example, the processing unit may include at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the first device may be configured to: obtain information related to a resource pool; obtain first priority information for sidelink transmissions; receive LTE (long term evolution) SCI (sidelink control information) from a second device, including resource reservation information and second priority information, based on that the instructions are executed by the at least one processor; and determine a set of candidate resources for the sidelink transmissions. For example, a candidate resource associated with a PSFCH (physical sidelink feedback channel) resource may be excluded from the set of candidate resources for the sidelink transmissions based on (i) a PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) an LTE RSRP (reference signal received power) value measured based on the LTE SCI is greater than an RSRP threshold determined based on the first priority information and the second priority information, and (iii) the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information.

[0223] For example, the candidate resource associated with the PSFCH slot may be included in the set of candidate resources for the sidelink transmission on the basis that (i) the PSFCH resource is set in the resource pool, (ii) the LTE RSRP value measured based on the LTE SCI is not greater than the RSRP threshold determined based on the first priority information and the second priority information, and (iii) the PSFCH slot overlaps with the LTE subframe determined based on the resource reservation information.

[0224] A non-temporary computer-readable storage medium recording instructions is provided according to one embodiment of the present disclosure. For example, when executed, the instructions may cause a first device to: acquire information relating to a resource pool; acquire first priority information for sidelink transmissions; receive LTE (long term evolution) SCI (sidelink control information) from a second device, including resource reservation information and second priority information; and determine a set of candidate resources for the sidelink transmissions. For example, a candidate resource associated with a PSFCH (physical sidelink feedback channel) resource may be excluded from the set of candidate resources for the sidelink transmissions based on (i) a PSFCH (physical sidelink feedback channel) resource being set in the resource pool, (ii) an LTE RSRP (reference signal received power) value measured based on the LTE SCI being greater than an RSRP threshold determined based on the first priority information and the second priority information, and (iii) the PSFCH slot overlapping with an LTE subframe determined based on the resource reservation information.

[0225] For example, the candidate resource associated with the PSFCH slot may be included in the set of candidate resources for the sidelink transmission on the basis that (i) the PSFCH resource is set in the resource pool, (ii) the LTE RSRP value measured based on the LTE SCI is not greater than the RSRP threshold determined based on the first priority information and the second priority information, and (iii) the PSFCH slot overlaps with the LTE subframe determined based on the resource reservation information.

[0226] Figure 12 shows a method by which a second device performs wireless communication according to one embodiment of the present disclosure. The embodiment in Figure 12 can be combined with various embodiments of the present disclosure.

[0227] Referring to Figure 12, in step S1210, the second device can acquire information related to the resource pool. In step S1220, the second device can receive a sidelink transmission from the first device. For example, a candidate resource associated with the PSFCH slot can be excluded from the set of candidate resources for the sidelink transmission if (i) a PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) the LTE RSRP (reference signal received power) value measured based on LTE (long term evolution) SCI (sidelink control information) including resource reservation information and second priority information is greater than the RSRP threshold determined based on the first priority information and the second priority information for the sidelink transmission, and (iii) the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information.

[0228] The proposed method can be applied to devices according to various embodiments of the present disclosure. First, the processor 202 of the second device 200 can acquire information related to the resource pool. The processor 202 of the second device 200 can then control the transceiver 206 to receive sidelink transmissions from the first device. For example, a candidate resource associated with a PSFCH slot can be excluded from the set of candidate resources for sidelink transmissions based on (i) a PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) an LTE RSRP (reference signal received power) value measured based on LTE (long term evolution) SCI (sidelink control information) including resource reservation information and second priority information is greater than an RSRP threshold determined based on the first priority information and the second priority information for the sidelink transmission, and (iii) the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information.

[0229] A second device configured to perform wireless communication is provided according to one embodiment of the present disclosure. For example, the second device may include at least one transceiver; at least one processor; and at least one memory connected to the at least one processor for storing instructions. For example, the second device may be configured to: acquire information related to a resource pool based on the fact that the instructions are executed by the at least one processor; and to receive sidelink transmissions from the first device. For example, a candidate resource associated with a PSFCH slot may be excluded from the set of candidate resources for the sidelink transmission based on the fact that (i) a PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) an LTE RSRP (reference signal received power) value measured based on LTE (long term evolution) SCI (sidelink control information) including resource reservation information and second priority information is greater than an RSRP threshold determined based on the first priority information and the second priority information for the sidelink transmission, and (iii) the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information.

[0230] A processing unit configured to control a second device is provided according to one embodiment of the present disclosure. For example, the processing unit may include at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the second device may be configured to: acquire information related to a resource pool; and receive sidelink transmissions from the first device, based on that the instructions are executed by the at least one processor. For example, a candidate resource associated with a PSFCH slot may be excluded from the set of candidate resources for the sidelink transmission based on (i) a PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) an LTE RSRP (reference signal received power) value measured based on LTE (long term evolution) SCI (sidelink control information) including resource reservation information and second priority information is greater than an RSRP threshold determined based on the first priority information and the second priority information for the sidelink transmission, and (iii) the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information.

[0231] A non-temporary computer-readable storage medium recording instructions is provided according to one embodiment of the present disclosure. For example, the instructions, when executed, may cause a second device to: acquire information related to a resource pool; and receive a sidelink transmission from a first device. For example, a candidate resource associated with a PSFCH slot may be excluded from the set of candidate resources for the sidelink transmission based on (i) a PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) an LTE RSRP (reference signal received power) value measured based on LTE (long term evolution) SCI (sidelink control information) including resource reservation information and second priority information is greater than an RSRP threshold determined based on the first priority information and the second priority information for the sidelink transmission, and (iii) the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information.

[0232] According to various embodiments of this disclosure, when LTE SL reserved resources and PSFCH resources overlap in time, it can be determined based on an RSRP measurement whether to exclude all NR candidate resources associated with the PSFCH from available resources. Here, since this operation is performed in step 5 of Table 7, the RSRP threshold may not change. Furthermore, periodic LTE SL resources can be derived based on a Q value obtained based on the size of the selection window. Through this, the problem of insufficient available resources that occurs when LTE SL reserved resources and PSFCH resources overlap in time, by excluding all NR candidate resources associated with the PSFCH from available resources, can be solved. Also, by not allowing an increase in the RSRP threshold, the problem of additional AGC due to overlap between LTE SL transmission and PSFCH can be solved. Furthermore, by obtaining a Q value based on the size of the selection window, the problem of unnecessary reduction in available resources due to deriving periodic LTE SL resources based on a large Q value can be solved. Thus, the additional AGC problem at the LTE SL end in mixed NR SL and LTE SL situations is mitigated, and the terminal can efficiently select NR SL resources.

[0233] Various embodiments of this disclosure can be combined with each other.

[0234] The following describes devices to which various embodiments of this disclosure apply.

[0235] Without limit, the various descriptions, functions, procedures, suggestions, methods and / or operation sequence diagrams disclosed in this document can be applied to various fields requiring wireless communication / connection (e.g., 5G) between devices.

[0236] The following provides more specific examples with reference to the drawings. In the following drawings and descriptions, unless otherwise specified, the same or corresponding hardware blocks, software blocks, or functional blocks can be illustrated by the same reference numerals in the same drawings.

[0237] Figure 13 shows a communication system (1) according to one embodiment of the present disclosure. The embodiment in Figure 13 can be combined with various embodiments of the present disclosure.

[0238] Referring to Figure 13, the communication system (1) to which various embodiments of this disclosure apply includes wireless equipment, base stations, and networks. Here, wireless equipment means equipment that communicates using wireless connectivity technologies (e.g., 5G NR (New RAT), LTE (Long term evolution)), and can be called communication / wireless / 5G equipment. However, wireless equipment can include, but is not limited to, robots 100a, vehicles 100b-1, 100b-2, XR (eXtended Reality) equipment 100c, handheld devices 100d, home appliances 100e, IoT (Internet of Things) equipment 100f, and AI equipment / servers 400. For example, vehicles can include vehicles equipped with wireless communication capabilities, autonomous vehicles, and vehicles capable of vehicle-to-vehicle communication. Here, a vehicle can include a UAV (Unmanned aerial vehicle) (e.g., a drone) and / or an AV (Aerial Vehicle) (e.g., an AAM (Advanced Air Mobility)). XR devices include AR (Augmented Reality) / VR (Virtual Reality) / MR (Mixed Reality) devices and can be implemented in the form of HMDs (Head-Mounted Devices), HUDs (Head-Up Displays) mounted on vehicles, televisions, smartphones, computers, wearable devices, home appliances, digital signage, vehicles, robots, etc. Mobile devices can include smartphones, smart pads, wearable devices (e.g., smartwatches, smart glasses), computers (e.g., laptops, etc.). Home appliances can include TVs, refrigerators, washing machines, etc. IoT devices can include sensors, smart meters, etc. For example, base stations and networks can also be implemented as wireless devices, and certain wireless devices 200a can operate as base stations / network nodes with other wireless devices.

[0239] Here, the wireless communication technologies implemented in the wireless devices 100a to 100f of this specification may include not only LTE, NR, and 6G, but also Narrowband Internet of Things for low-power communication. In this case, for example, NB-IoT technology is an example of LPWAN (Low Power Wide Area Network) technology and can be implemented as standards such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the names mentioned above. Furthermore, or generally, the wireless communication technologies implemented in the wireless devices 100a to 100f of this specification can communicate based on LTE-M technology. In this case, for example, LTE-M technology is an example of LPWAN technology and is called by various names such as eMTC (enhanced Machine Type Communication). For example, LTE-M technology can be implemented in at least one of various standards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-Bandwidth Limited), 5) LTE-MTC, 6) LTE Machine Type Communication, and / or 7) LTE M, and is not limited to the names mentioned above. Furthermore, the wireless communication technologies implemented in the wireless devices 100a to 100f of this specification may include, or generally may not include, at least one of ZigBee, Bluetooth (registered trademark), and Low Power Wide Area Network (LPWAN), which take low-power communication into consideration. For example, Zigbee technology can generate personal area networks (PANs) related to small / low-power digital communication based on various standards such as IEEE 802.15.4, and is known by various names.

[0240] Wireless devices 100a to 100f can be connected to the network 300 via the base station 200. Artificial Intelligence (AI) technology can be applied to wireless devices 100a to 100f, and 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. Wireless devices 100a to 100f can communicate with each other via the base station 200 / network 300, but they can also communicate directly (e.g., sidelink communication) without going through the base station / network. For example, vehicles 100b-1 and 100b-2 can communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to everything) communication). Furthermore, IoT devices (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0241] Wireless devices 100a to 100f / base station 200, between base stations 200 / base stations 200, wireless communication / connection 150a, 150b, 150c can be performed. Here, the wireless communication / connection can be performed via uplink / downlink communication 150a, sidelink communication 150b (or D2D communication), and communication 150c between base stations (for example, various wireless connection technologies such as relay, IAB (Integrated Access Backhaul) (for example, 5G NR)). Through the wireless communication / connection 150a, 150b, 150c, the wireless device and the base station / wireless device, and the base station and the base station can transmit / receive wireless signals to each other. For example, the wireless communication / connection 150a, 150b, 150c can transmit / receive signals via various physical channels. Therefore, based on various proposals of the present disclosure, at least a part of various configuration information setting processes for transmitting / receiving wireless signals, various signal processing processes (for example, channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.), resource allocation processes, etc. can be executed.

[0242] FIG. 14 shows a wireless device according to an embodiment of the present disclosure. The embodiment of FIG. 14 can be combined with various embodiments of the present disclosure.

[0243] Referring to FIG. 14, the first wireless device 100 and the second wireless device 200 can transmit and receive wireless signals via various wireless connection technologies (for example, LTE, NR). Here, {the first wireless device 100, the second wireless device 200} can correspond to {the wireless device 100x, the base station 200} and / or {the wireless device 100x, the wireless device 100x} in FIG. 13.

[0244] The first wireless device 100 includes one or more processors 102 and one or more memories 104, and may further include one or more transceivers 106 and / or one or more antennas 108. The processor 102 may control the memories 104 and / or the transceivers 106 and be configured to embody the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. For example, the processor 102 may process information in the memory 104 to generate first information / signals and then transmit a wireless signal containing the first information / signals via the transceiver 106. Alternatively, the processor 102 may receive a wireless signal containing second information / signals via the transceiver 106 and then store information obtained from signal processing of the second information / signals in the memory 104. The memory 104 may be linked to the processor 102 and may store various information related to the operation of the processor 102. For example, memory 104 may store software code that includes instructions for executing some or all of the processes controlled by processor 102, or for executing the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. Here, processor 102 and memory 104 are part of a communication modem / circuit / chip designed to embody wireless communication technology (e.g., LTE, NR). Transceiver 106 may be coupled with processor 102 and may transmit and / or receive radio signals via one or more antennas 108. Transceiver 106 may include a transmitter and / or receiver. Transceiver 106 may be used in combination with an RF (Radio Frequency) unit. In this disclosure, wireless equipment may also mean a communication modem / circuit / chip.

[0245] The second wireless device 200 includes one or more processors 202, one or more memories 204, and may further include one or more transceivers 206 and / or one or more antennas 208. The processor 202 may control the memories 204 and / or the transceivers 206 and be configured to embody the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. For example, the processor 202 may process information in the memory 204 to generate third information / signals and then transmit a wireless signal containing the third information / signals via the transceiver 206. Alternatively, the processor 202 may receive a wireless signal containing fourth information / signals via the transceiver 206 and then store information obtained from signal processing of the fourth information / signals in the memory 204. The memory 204 may be linked to the processor 202 and may store various information related to the operation of the processor 202. For example, memory 204 may store software code containing instructions for executing some or all of the processes controlled by processor 202, or for executing the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. Here, processor 202 and memory 204 are part of a communication modem / circuit / chip designed to embody wireless communication technology (e.g., LTE, NR). Transceiver 206 may be coupled with processor 202 and may transmit and / or receive radio signals via one or more antennas 208. Transceiver 206 may include a transmitter and / or receiver and may be used in combination with an RF unit. In this disclosure, wireless equipment may also mean a communication modem / circuit / chip.

[0246] The hardware elements of wireless devices 100 and 200 will be described in more detail below. However, one or more protocol layers can be embodied by one or more processors 102 and 202. For example, one or more processors 102 and 202 can embodied one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). One or more processors 102 and 202 can generate one or more PDUs (Protocol Data Units) and / or one or more SDUs (Service Data Units) by means of the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed in this document. One or more processors 102 and 202 can generate messages, control information, data, or information by means of the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed in this document. One or more processors 102, 202 can generate signals (e.g., baseband signals) containing PDUs, SDUs, messages, control information, data, or information by means of the functions, procedures, suggestions, and / or methods disclosed in this document and provide them to one or more transceivers 106, 206. One or more processors 102, 202 can receive signals (e.g., baseband signals) from one or more transceivers 106, 206 and acquire PDUs, SDUs, messages, control information, data, or information by means of the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed in this document.

[0247] One or more processors 102, 202 are referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102, 202 can be embodied by hardware, firmware, software, or a combination thereof. For example, one or more ASICs (Application Specific Integrated Circuits), one or more DSPs (Digital Signal Processors), one or more DSPDs (Digital Signal Processing Devices), one or more PLDs (Programmable Logic Devices), or one or more FPGAs (Field Programmable Gate Arrays) may be included in one or more processors 102, 202. The descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein may be embodied using firmware or software, and the firmware or software may be embodied to include modules, procedures, functions, etc. The descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein may be implemented by one or more processors 102, 202, or stored in one or more memories 104, 204 and driven by one or more processors 102, 202, with firmware or software configured to execute them. The descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein may be implemented using firmware or software in the form of code, instructions and / or sets of instructions.

[0248] One or more memory units 104, 204 can be connected to one or more processors 102, 202 and can store various forms of data, signals, messages, information, programs, code, instructions, and / or commands. One or more memory units 104, 204 can consist of ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer read / store media, and / or combinations thereof. One or more memory units 104, 204 can be located inside and / or outside of one or more processors 102, 202. Furthermore, one or more memory units 104, 204 can be connected to one or more processors 102, 202 via various technologies such as wired or wireless connections.

[0249] One or more transceivers 106, 206 can transmit user data, control information, radio signals / channels, etc., as referred to in the methods and / or operational flowcharts, etc., described herein to one or more other devices. One or more transceivers 106, 206 can receive user data, control information, radio signals / channels, etc., as referred to in the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts, etc., disclosed herein from one or more other devices. For example, one or more transceivers 106, 206 can be connected to one or more processors 102, 202 to transmit and receive radio signals. For example, one or more processors 102, 202 can control one or more transceivers 106, 206 to transmit user data, control information or radio signals to one or more other devices. Also, one or more processors 102, 202 can control one or more transceivers 106, 206 to receive user data, control information or radio signals from one or more other devices. Furthermore, one or more transceivers 106, 206 can be connected to one or more antennas 108, 208 and configured to transmit and receive user data, control information, radio signals / channels, etc., as referred to in the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein, via one or more antennas 108, 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106, 206 can convert received user data, control information, radio signals / channels, etc., from RF band signals to baseband signals for processing using one or more processors 102, 202. One or more transceivers 106, 206 can convert user data, control information, radio signals / channels, etc., processed using one or more processors 102, 202, from baseband signals to RF band signals. For this purpose, one or more transceivers 106, 206 may include (analog) oscillators and / or filters.

[0250] Figure 15 shows a signal processing circuit for a transmitted signal according to one embodiment of the present disclosure. The embodiment in Figure 15 can be combined with various embodiments of the present disclosure.

[0251] Referring to Figure 15, the signal processing circuit 1000 may include a scrambler 1010, a modulator 1020, a layer mapper 1030, a precoder 1040, a resource mapper 1050, and a signal generator 1060. However, it is not limited to these, and the operation / function of Figure 15 can be performed by the processors 102, 202 and / or transceivers 106, 206 of Figure 14. The hardware elements of Figure 15 can be embodied by the processors 102, 202 and / or transceivers 106, 206 of Figure 14. For example, blocks 1010-1060 can be embodied by the processors 102, 202 of Figure 14. Also, blocks 1010-1050 can be embodied by the processors 102, 202 of Figure 14, and block 1060 can be embodied by the transceivers 106, 206 of Figure 14.

[0252] The codeword can be converted into a radio signal via the signal processing circuit 1000 in Figure 15. Here, the codeword is an encoded bit sequence of information blocks. The information blocks may include transmit blocks (e.g., UL-SCH transmit block, DL-SCH transmit block). The radio signal can be transmitted via various physical channels (e.g., PUSCH, PDSCH).

[0253] Specifically, the codeword can be converted into a scrambled bit sequence by the scrambler 1010. The scrambled sequence used for scrambling is generated based on an initialization value, which may include the ID information of the radio equipment. The scrambled bit sequence can be modulated into a modulated symbol sequence by the modulator 1020. The modulation scheme can include pi / 2-BPSK (pi / 2-Binary Phase Shift Keying), m-PSK (m-Phase Shift Keying), m-QAM (m-Quadrature Amplitude Modulation), etc. The complex modulated symbol sequence can be mapped to one or more transmission layers by the layer mapper 1030. The modulated symbol of each transmission layer can be mapped to the corresponding antenna port (ra) by the precoder 1040 (precoding). The output z of the precoder 1040 is obtained by multiplying the output y of the layer mapper 1030 by an 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 transformation) on the complex modulation symbols. Alternatively, the precoder 1040 can perform precoding without performing transform precoding.

[0254] The resource mapper 1050 can map the modulation symbols of each antenna port to a time-frequency resource. The time-frequency resource may include multiple symbols in the time domain (e.g., CP-OFDMA symbols, DFT-s-OFDMA symbols) and multiple subcarriers in the frequency domain. The signal generator 1060 generates a radio signal from the mapped modulation symbols, and the generated radio signal can be transmitted to other devices via each antenna. To this end, the signal generator 1060 may include an IFFT (Inverse Fast Fourier Transform) module, a CP (Cyclic Prefix) inserter, a DAC (Digital-to-Analog Converter), a frequency uplink converter, and the like.

[0255] In wireless equipment, the signal processing process for a received signal can be configured as the reverse of the signal processing processes 1010-1060 in Figure 15. For example, wireless equipment (e.g., 100, 200 in Figure 14) can receive wireless signals from an external source via an antenna port / transceiver. The received wireless signal can be converted into a baseband signal via a signal restorer. For this purpose, the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a Fast Fourier Transform (FFT) module. Subsequently, the baseband signal can be restored to a codeword through a resource demapper process, a postcoding process, a demodulation process, and a descramble process. The codeword can be decoded to restore the original information blocks. Therefore, a signal processing circuit (not shown) for a received signal may include a signal restorer, a resource demapper, a postcoder, a demodulator, a descrambler, and a decoder.

[0256] Figure 16 shows a wireless device according to one embodiment of the present disclosure. The wireless device can be implemented in a variety of forms depending on the use-example / service (see Figure 13). The embodiment in Figure 16 can be combined with various embodiments of the present disclosure.

[0257] Referring to Figure 16, the wireless devices 100 and 200 correspond to the wireless devices 100 and 200 in Figure 14 and can be composed of various elements, components, units, and / or modules. For example, the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and an additional element 140. The communication unit may include a communication circuit 112 and transceivers (etc.) 114. For example, the communication circuit 112 may include one or more processors 102, 202 and / or one or more memories 104, 204 in Figure 13. For example, the transceivers (etc.) 114 may include one or more transceivers 106, 206 and / or one or more antennas 108, 208 in Figure 14. The control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional element 140 and controls the various operations 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 / instructions / information stored in the memory unit 130. The control unit 120 can also transmit the information stored in the memory unit 130 to an external device (e.g., another communication device) via a wireless / wired interface through the communication unit 110, or store information received from an external device (e.g., another communication device) via a wireless / wired interface through the communication unit 110 in the memory unit 130.

[0258] The additional element 140 can be configured in various ways depending on the type of wireless device. For example, the additional element 140 may include at least one of the following: a power unit / battery, an input / output unit (I / O unit), a drive unit, and a computing unit. However, wireless devices can be embodied in forms such as robots (100a in Figure 13), vehicles (100b-1, 100b-2 in Figure 13), XR devices (100c in Figure 13), mobile devices (100d in Figure 13), home appliances (100e in Figure 13), IoT devices (100f in Figure 13), digital broadcasting terminals, hologram devices, public safety devices, MTC devices, medical devices, fintech devices (or financial devices), security devices, climate / environmental devices, AI servers / devices (400 in Figure 13), base stations (200 in Figure 13), and network nodes. Depending on the use-example / service, wireless devices may be mobile or used in a fixed location.

[0259] In Figure 16, the various elements, components, units / parts, and / or modules within the wireless devices 100 and 200 can be interconnected as a whole via a wired interface, or at least some of them can be connected wirelessly via the communication unit 110. For example, within the wireless devices 100 and 200, the control unit 120 and the communication unit 110 can be connected via a wired connection, and the control unit 120 and the first units (e.g., 130, 140) can be connected wirelessly via the communication unit 110. Furthermore, each element, component, unit / part, and / or module within the wireless devices 100 and 200 may further include one or more elements. For example, the control unit 120 may consist of a collection of one or more processors. For example, the control unit 120 may consist of a collection of a communication control processor, an application processor, an ECU (Electronic Control Unit), a graphics processing processor, a memory control processor, and so on. As another example, the memory unit 130 may consist of RAM (Random Access Memory), DRAM (Dynamic RAM), ROM (Read Only Memory), flash memory, volatile memory, non-volatile memory, and / or a combination thereof.

[0260] The following provides a more detailed explanation of the example shown in Figure 16, with reference to other drawings.

[0261] Figure 17 shows a portable device according to one embodiment of the present disclosure. The portable device may include a smartphone, a smartpad, a wearable device (e.g., a smartwatch, smart glass), or a portable computer (e.g., a laptop computer). The portable device may be referred to as an MS (Mobile Station), UT (user terminal), MSS (Mobile Subscriber Station), SS (Subscriber Station), AMS (Advanced Mobile Station), or WT (Wireless terminal). The embodiment in Figure 17 can be combined with various embodiments of the present disclosure.

[0262] Referring to Figure 17, the portable device 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a memory unit 130, a power supply unit 140a, an interface unit 140b, and an input / output unit 140c. The antenna unit 108 may be composed of a part of the communication unit 110. Blocks 110-130 / 140a-140c correspond to blocks 110-130 / 140 in Figure 16, respectively.

[0263] The communication unit 110 can send and receive signals (e.g., data, control signals, etc.) with other wireless devices and base stations. The control unit 120 can control the components of the portable device 100 and perform various operations. The control unit 120 may include an AP (Application Processor). The memory unit 130 can store data / parameters / programs / code / instructions necessary to operate the portable device 100. The memory unit 130 can also store input / output data / information, etc. The power supply unit 140a supplies power to the portable device 100 and may include wired / wireless charging circuits, batteries, etc. The interface unit 140b can support the connection of the portable device 100 with other external devices. The interface unit 140b may include various ports for connection with external devices (e.g., audio input / output ports, video input / output ports). The input / output unit 140c can receive and output video information / signals, audio information / signals, data, and / or information input from the user. The input / output section 140c may include a camera, microphone, user input section, display section 140d, speaker and / or haptic module, etc.

[0264] For example, in the case of data communication, the input / output unit 140c acquires information / signals input from the user (e.g., touch, text, voice, image, video), and the acquired information / signals can be stored in the memory unit 130. The communication unit 110 converts the information / signals stored in memory into a radio signal and can transmit the converted radio signal directly to other radio devices or to a base station. Furthermore, after receiving a radio signal from another radio device or base station, the communication unit 110 can restore the received radio signal to its original information / signal. The restored information / signal is stored in the memory unit 130 and can then be output via the input / output unit 140c in various forms (e.g., text, voice, image, video, haptic).

[0265] Figure 18 shows a vehicle or autonomous vehicle according to one embodiment of the present disclosure. The vehicle or autonomous vehicle can be implemented as a mobile robot, a vehicle, a train, a manned or unmanned aerial vehicle (AV), a ship, etc. The embodiment in Figure 18 can be combined with various embodiments of the present disclosure.

[0266] Referring to Figure 18, 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 composed of part of the communication unit 110. Blocks 110 / 130 / 140a to 140d correspond to blocks 110 / 130 / 140 in Figure 16, respectively.

[0267] The communication unit 110 can send and receive signals (e.g., data, control signals, etc.) with external devices such as other vehicles, base stations (e.g., base stations, roadside units, etc.), and servers. The control unit 120 can control elements of the vehicle or autonomous vehicle 100 and perform various operations. The control unit 120 may include an ECU (Electronic Control Unit). The drive unit 140a can make the vehicle or autonomous vehicle 100 travel on the ground. The drive unit 140a may include an engine, motor, powertrain, wheels, brakes, steering system, etc. The power supply unit 140b supplies power to the vehicle or autonomous vehicle 100 and may include a wired / wireless charging circuit, battery, etc. The sensor unit 140c can obtain vehicle status, surrounding environment information, user information, etc. The sensor unit 140c may include an IMU (inertial measurement unit) sensor, collision sensor, wheel sensor, speed sensor, tilt sensor, weight detection sensor, heading sensor, position module, vehicle forward / reverse sensor, battery sensor, fuel sensor, tire sensor, steering sensor, temperature sensor, humidity sensor, ultrasonic sensor, illuminance sensor, pedal position sensor, etc. The autonomous driving unit 140d can implement technologies such as maintaining a lane while driving, automatically adjusting speed like adaptive cruise control, automatically driving along a predetermined route, and automatically setting a route and driving when a destination is set.

[0268] 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 route and driving plan based on the acquired data. The control unit 120 can control the drive unit 140a so that the vehicle or autonomous vehicle 100 moves along the autonomous driving route according to the driving plan (e.g., speed / direction adjustment). During autonomous driving, the communication unit 110 can acquire the latest traffic information data from the external server non-periodically and acquire surrounding traffic information data from surrounding vehicles. Also, during autonomous driving, the sensor unit 140c can acquire vehicle status and surrounding environment information. The autonomous driving unit 140d can update the autonomous driving route and driving plan based on the newly acquired data / information. The communication unit 110 can transmit information such as vehicle position, autonomous driving route, and driving plan to the external server. The external server can predict traffic information data in advance using AI technology, etc., based on the information collected from the vehicle or autonomous vehicle, and can provide the predicted traffic information data to the vehicle or autonomous vehicle.

[0269] The claims described herein can be combined in various ways. For example, the technical features of the method claims herein can be combined and embodied in an apparatus, and the technical features of the apparatus claims herein can be combined and embodied in a method. Furthermore, the technical features of the method claims and the technical features of the apparatus claims herein can be combined and embodied in an apparatus, and the technical features of the method claims and the technical features of the apparatus claims herein can be combined and embodied in a method.

[0270] [Claims when filing an international application] [Claim 1] A method by which the first device performs wireless communication, Steps to obtain information related to the resource pool; Steps to obtain first priority information for sidelink transmission; The steps include receiving LTE (long term evolution) SCI (sidelink control information) containing resource reservation information and second priority information from a second device; and The step of determining a set of candidate resources for the sidelink transmission; (i) A PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) The LTE RSRP (reference signal received power) value measured based on the LTE SCI is greater than the RSRP threshold determined based on the first priority information and the second priority information, (iii) A method in which, on the basis that the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information, a candidate resource associated with the PSFCH slot is excluded from the set of candidate resources for the sidelink transmission. [Claim 2] The first priority information is priority information for NR sidelink communication, and The method according to claim 1, wherein the second priority information is priority information for LTE sidelink communication. [Claim 3] The method according to claim 1, wherein the PSFCH slot overlaps in the time domain with the LTE subframe determined based on the resource reservation information. [Claim 4] (i) The PSFCH resource is set in the resource pool, (ii) The LTE RSRP value measured based on the LTE SCI is not greater than the RSRP threshold determined based on the first priority information and the second priority information, and (iii) The method according to claim 1, wherein the candidate resource associated with the PSFCH slot is included in the set of candidate resources for the sidelink transmission, based on the fact that the PSFCH slot overlaps with the LTE subframe determined based on the resource reservation information. [Claim 5] The method according to claim 1, wherein boosting the RSRP threshold is not permitted. [Claim 6] The method according to claim 1, wherein the RSRP threshold is not increased based on the number of remaining candidate resources in the set of candidate resources being less than a threshold. [Claim 7] The method according to claim 1, wherein a periodic reservation resource related to the LTE SCI is determined based on the resource reservation information and the Q value. [Claim 8] The method according to claim 7, further comprising the step of determining a selection window based on the remaining packet delay budget associated with the sidelink transmission. [Claim 9] The method according to claim 8, wherein the Q value is obtained based on the size of the selection window divided by the product of the resource reservation information and 100. [Claim 10] The method according to claim 9, wherein the number of periodic reservation resources associated with the LTE SCI is Q. [Claim 11] The method according to claim 1, further comprising the step of selecting resources for PSCCH (physical sidelink control channel) transmission and PSSCH (physical sidelink shared channel) transmission within the set of candidate resources. [Claim 12] A first device configured to perform wireless communication, At least one transceiver; at least one processor; and The system comprises at least one memory connected to the at least one processor and storing instructions; Based on the fact that the instruction is executed by the at least one processor, the first device, To obtain information related to the resource pool; To obtain first priority information for sending sidelinks; The system is configured to receive LTE (long term evolution) SCI (sidelink control information) containing resource reservation information and second priority information from the second device; and The set of candidate resources for the aforementioned sidelink transmission is determined; (i) A PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) The LTE RSRP (reference signal received power) value measured based on the LTE SCI is greater than the RSRP threshold determined based on the first priority information and the second priority information, (iii) Based on the fact that the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information, the first device excludes the candidate resource associated with the PSFCH slot from the set of candidate resources for the sidelink transmission. [Claim 13] (i) The PSFCH resource is set in the resource pool, (ii) The LTE RSRP value measured based on the LTE SCI is not greater than the RSRP threshold determined based on the first priority information and the second priority information, and (iii) The first apparatus according to claim 12, wherein the candidate resource associated with the PSFCH slot is included in the set of candidate resources for the sidelink transmission, based on the fact that the PSFCH slot overlaps with the LTE subframe determined based on the resource reservation information. [Claim 14] A processing device configured to control the first device, at least one processor; and The system comprises at least one memory connected to the at least one processor and storing instructions; Based on the fact that the instruction is executed by the at least one processor, the first device, To obtain information related to the resource pool; To obtain first priority information for sending sidelinks; The system is configured to receive LTE (long term evolution) SCI (sidelink control information) containing resource reservation information and second priority information from the second device; and The set of candidate resources for the aforementioned sidelink transmission is determined; (i) A PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) The LTE RSRP (reference signal received power) value measured based on the LTE SCI is greater than the RSRP threshold determined based on the first priority information and the second priority information, (iii) A processing unit in which, based on the fact that the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information, a candidate resource associated with the PSFCH slot is excluded from the set of candidate resources for the sidelink transmission. [Claim 15] (i) The PSFCH resource is set in the resource pool, (ii) The LTE RSRP value measured based on the LTE SCI is not greater than the RSRP threshold determined based on the first priority information and the second priority information, and (iii) The apparatus according to claim 14, wherein the candidate resource associated with the PSFCH slot is included in the set of candidate resources for the sidelink transmission, based on the fact that the PSFCH slot overlaps with the LTE subframe determined based on the resource reservation information. [Claim 16] A non-temporary computer-readable storage medium that records instructions, When the aforementioned instruction is executed, the first device will, To obtain information related to the resource pool; To obtain first priority information for sending sidelinks; The system is configured to receive LTE (long term evolution) SCI (sidelink control information) containing resource reservation information and second priority information from the second device; and The set of candidate resources for the aforementioned sidelink transmission is determined; (i) A PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) The LTE RSRP (reference signal received power) value measured based on the LTE SCI is greater than the RSRP threshold determined based on the first priority information and the second priority information, (iii) A non-temporary computer-readable storage medium in which, based on the fact that the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information, candidate resources associated with the PSFCH slot are excluded from the set of candidate resources for the sidelink transmission. [Claim 17] A method by which the second device performs wireless communication, Steps to obtain information related to the resource pool; and The step of receiving a sidelink transmission from the first device; (i) A PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) The LTE RSRP (reference signal received power) value measured based on LTE (long term evolution) SCI (sidelink control information) including resource reservation information and second priority information is greater than the RSRP threshold determined based on the first priority information and the second priority information for sidelink transmission, (iii) A method in which, based on the fact that the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information, a candidate resource associated with the PSFCH slot is excluded from the set of candidate resources for the sidelink transmission. [Claim 18] A second device configured to perform wireless communication, At least one transceiver; at least one processor; and The system comprises at least one memory connected to the at least one processor and storing instructions; Based on the fact that the instruction is executed by the at least one processor, the second device, To obtain information related to the resource pool; and The first device is configured to receive sidelink transmissions; (i) A PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) The LTE RSRP (reference signal received power) value measured based on LTE (long term evolution) SCI (sidelink control information) including resource reservation information and second priority information is greater than the RSRP threshold determined based on the first priority information and the second priority information for sidelink transmission, and (iii) A second device in which, based on the fact that the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information, a candidate resource associated with the PSFCH slot is excluded from the set of candidate resources for the sidelink transmission. [Claim 19] A processing device configured to control a second device, at least one processor; and The system comprises at least one memory connected to the at least one processor and storing instructions; Based on the fact that the instruction is executed by the at least one processor, the second device, To obtain information related to the resource pool; and The first device is configured to receive sidelink transmissions; (i) A PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) The LTE RSRP (reference signal received power) value measured based on LTE (long term evolution) SCI (sidelink control information) including resource reservation information and second priority information is greater than the RSRP threshold determined based on the first priority information and the second priority information for sidelink transmission, and (iii) A processing unit in which, based on the fact that the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information, a candidate resource associated with the PSFCH slot is excluded from the set of candidate resources for the sidelink transmission. [Claim 20] A non-temporary computer-readable storage medium that records instructions, When the aforementioned instruction is executed, the second device will, To obtain information related to the resource pool; and The first device is configured to receive sidelink transmissions; (i) A PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) The LTE RSRP (reference signal received power) value measured based on LTE (long term evolution) SCI (sidelink control information) including resource reservation information and second priority information is greater than the RSRP threshold determined based on the first priority information and the second priority information for sidelink transmission, and (iii) A non-temporary computer-readable storage medium in which, based on the fact that the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information, candidate resources associated with the PSFCH slot are excluded from the set of candidate resources for the sidelink transmission.

Claims

1. A method by which the first device performs wireless communication, Steps to obtain information related to the resource pool; Steps to obtain first priority information for sidelink transmission; The steps include receiving LTE (long term evolution) SCI (sidelink control information) containing resource reservation information and second priority information from a second device; and The step of determining a set of candidate resources for the sidelink transmission; (i) A PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) The LTE RSRP (reference signal received power) value measured based on the LTE SCI is greater than the RSRP threshold determined based on the first priority information and the second priority information, and (iii) A method in which a candidate resource associated with a PSFCH slot is excluded from the set of candidate resources for the sidelink transmission based on the fact that the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information.

2. The first priority information is priority information for NR sidelink communication, and The method according to claim 1, wherein the second priority information is priority information for LTE sidelink communication.

3. The method according to claim 1, wherein the PSFCH slot overlaps in the time domain with the LTE subframe determined based on the resource reservation information.

4. (i) The PSFCH resource is set in the resource pool, (ii) The LTE RSRP value measured based on the LTE SCI is not greater than the RSRP threshold determined based on the first priority information and the second priority information, and (iii) The method according to claim 1, wherein the candidate resource associated with the PSFCH slot is included in the set of candidate resources for the sidelink transmission, based on the fact that the PSFCH slot overlaps with the LTE subframe determined based on the resource reservation information.

5. The method according to claim 1, wherein boosting the RSRP threshold is not permitted.

6. The method according to claim 1, wherein the RSRP threshold is not increased based on the number of remaining candidate resources in the set of candidate resources being less than a threshold.

7. The method according to claim 1, wherein a periodic reserved resource associated with the LTE SCI is determined based on the resource reservation information and the Q value.

8. The method according to claim 7, further comprising the step of determining a selection window based on the remaining packet delay budget associated with the sidelink transmission.

9. The method according to claim 8, wherein the Q value is obtained based on the size of the selection window divided by the product of the resource reservation information and 100.

10. The method according to claim 9, wherein the number of periodic reservation resources associated with the LTE SCI is Q.

11. The method according to claim 1, further comprising the step of selecting resources for PSCCH (physical sidelink control channel) transmission and PSSCH (physical sidelink shared channel) transmission within the set of candidate resources.

12. A first device configured to perform wireless communication, At least one transceiver; at least one processor; and The system comprises at least one memory connected to the at least one processor and storing instructions; Based on the fact that the instruction is executed by the at least one processor, the first device, To obtain information related to the resource pool; To obtain first priority information for sending sidelinks; The system is configured to receive LTE (long term evolution) SCI (sidelink control information) containing resource reservation information and second priority information from the second device; and The set of candidate resources for the aforementioned sidelink transmission is determined; (i) A PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) The LTE RSRP (reference signal received power) value measured based on the LTE SCI is greater than the RSRP threshold determined based on the first priority information and the second priority information, and (iii) A first device in which, based on the fact that a PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information, a candidate resource associated with the PSFCH slot is excluded from the set of candidate resources for the sidelink transmission.

13. (i) The PSFCH resource is set in the resource pool, (ii) The LTE RSRP value measured based on the LTE SCI is not greater than the RSRP threshold determined based on the first priority information and the second priority information, and (iii) The first apparatus according to claim 12, wherein the candidate resource associated with the PSFCH slot is included in the set of candidate resources for the sidelink transmission, based on the fact that the PSFCH slot overlaps with the LTE subframe determined based on the resource reservation information.

14. A processing apparatus configured to control the first device, at least one processor; and The system comprises at least one memory connected to the at least one processor and storing instructions; Based on the fact that the instruction is executed by the at least one processor, the first device, To obtain information related to the resource pool; To obtain first priority information for sending sidelinks; The system is configured to receive LTE (long term evolution) SCI (sidelink control information) containing resource reservation information and second priority information from the second device; and The set of candidate resources for the aforementioned sidelink transmission is determined; (i) A PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) The LTE RSRP (reference signal received power) value measured based on the LTE SCI is greater than the RSRP threshold determined based on the first priority information and the second priority information, and (iii) A processing unit in which, based on the fact that the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information, a candidate resource associated with the PSFCH slot is excluded from the set of candidate resources for the sidelink transmission.

15. (i) The PSFCH resource is set in the resource pool, (ii) The LTE RSRP value measured based on the LTE SCI is not greater than the RSRP threshold determined based on the first priority information and the second priority information, and (iii) The processing apparatus according to claim 14, wherein the candidate resource associated with the PSFCH slot is included in the set of candidate resources for the sidelink transmission, based on the fact that the PSFCH slot overlaps with the LTE subframe determined based on the resource reservation information.

16. A non-temporary computer-readable storage medium that records instructions, When the aforementioned instruction is executed, the first device will, To obtain information related to the resource pool; To obtain first priority information for sending sidelinks; The system is configured to receive LTE (long term evolution) SCI (sidelink control information) containing resource reservation information and second priority information from the second device; and The set of candidate resources for the aforementioned sidelink transmission is determined; (i) A PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) The LTE RSRP (reference signal received power) value measured based on the LTE SCI is greater than the RSRP threshold determined based on the first priority information and the second priority information, and (iii) A non-temporary computer-readable storage medium in which, based on the fact that the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information, candidate resources associated with the PSFCH slot are excluded from the set of candidate resources for the sidelink transmission.

17. A method by which the second device performs wireless communication, Steps to obtain information related to the resource pool; and The step of receiving a sidelink transmission from the first device; (i) A PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) The LTE RSRP (reference signal received power) value measured based on the LTE (long term evolution) SCI (sidelink control information) including resource reservation information and second priority information is greater than the RSRP threshold determined based on the first priority information and the second priority information for the sidelink transmission, and (iii) A method in which, based on the fact that the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information, a candidate resource associated with the PSFCH slot is excluded from the set of candidate resources for the sidelink transmission.

18. A second device configured to perform wireless communication, At least one transceiver; at least one processor; and The system comprises at least one memory connected to the at least one processor and storing instructions; Based on the fact that the instruction is executed by the at least one processor, the second device, To obtain information related to the resource pool; and The first device is configured to receive sidelink transmissions; (i) A PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) The LTE RSRP (reference signal received power) value measured based on the LTE (long term evolution) SCI (sidelink control information) including resource reservation information and second priority information is greater than the RSRP threshold determined based on the first priority information and the second priority information for the sidelink transmission, and (iii) A second device in which, based on the fact that the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information, a candidate resource associated with the PSFCH slot is excluded from the set of candidate resources for the sidelink transmission.

19. A processing device configured to control a second device, at least one processor; and The system comprises at least one memory connected to the at least one processor and storing instructions; Based on the fact that the instruction is executed by the at least one processor, the second device, To obtain information related to the resource pool; and The first device is configured to receive sidelink transmissions; (i) A PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) The LTE RSRP (reference signal received power) value measured based on the LTE (long term evolution) SCI (sidelink control information) including resource reservation information and second priority information is greater than the RSRP threshold determined based on the first priority information and the second priority information for the sidelink transmission, and (iii) A processing unit in which, based on the fact that the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information, a candidate resource associated with the PSFCH slot is excluded from the set of candidate resources for the sidelink transmission.

20. A non-temporary computer-readable storage medium that records instructions, When the aforementioned instruction is executed, the second device will, To obtain information related to the resource pool; and The first device is configured to receive sidelink transmissions; (i) A PSFCH (physical sidelink feedback channel) resource is set in the resource pool, (ii) The LTE RSRP (reference signal received power) value measured based on the LTE (long term evolution) SCI (sidelink control information) including resource reservation information and second priority information is greater than the RSRP threshold determined based on the first priority information and the second priority information for the sidelink transmission, and (iii) A non-temporary computer-readable storage medium in which, based on the fact that the PSFCH slot overlaps with an LTE subframe determined based on the resource reservation information, candidate resources associated with the PSFCH slot are excluded from the set of candidate resources for the sidelink transmission.

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