Method and apparatus for performing wireless communication

Abstract

Proposed are a method by which a first device performs wireless communication and an apparatus supporting same. For example, the first device may trigger resource selection for transmission of an RS. For example, the first device may select an RS resource from among a resource set, on the basis that the resource selection is triggered. For example, the first device may carry out RS transmission on the basis of the selected resource. For example, a resource associated with a feedback channel may be excluded from the resource set.

Description

Method and device for performing wireless communication

[0001] The present disclosure relates to a wireless communication system.

[0002] 5G NR, the successor to LTE (long-term evolution), is a new clean-slate mobile communications system characterized by high performance, low latency, and high availability. 5G NR can utilize all available spectrum resources, from low-frequency bands below 1 GHz, mid-frequency bands between 1 GHz and 10 GHz, and high-frequency (millimeter wave) bands above 24 GHz.

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

[0004] Per device peak data rate1 TbpsE2E latency1 msMaximum spectral efficiency100bps / HzMobility supportUp to 1000km / hrSatellite integrationFullyAIFullyAutonomous vehicleFullyXRFullyHaptic CommunicationFully

[0005] In one embodiment, a method for performing wireless communication by a first device is provided. For example, the first device may trigger resource selection for RS transmission. For example, the first device may select an RS resource from a resource set based on the resource selection trigger. For example, the first device may perform RS transmission based on the selected RS resource. For example, resources related to a feedback channel may be excluded from the resource set.

[0006] FIG. 1 illustrates a communication structure that can be provided in a 6G system according to one embodiment of the present disclosure.

[0007] FIG. 2 illustrates an electromagnetic spectrum according to one embodiment of the present disclosure.

[0008] FIG. 3 illustrates an example of a typical scenario of an NTN based on a transparent payload, according to one embodiment of the present disclosure.

[0009] FIG. 4 illustrates an example of a typical scenario of an NTN based on a regenerative payload, according to one embodiment of the present disclosure.

[0010] FIG. 5 illustrates an example of a sensing operation according to one embodiment of the present disclosure.

[0011] FIG. 6 illustrates a slot structure of a frame according to one embodiment of the present disclosure.

[0012] FIG. 7 illustrates an example of a BWP according to one embodiment of the present disclosure.

[0013] FIG. 8 illustrates a procedure for a terminal to perform V2X or SL communication according to a resource allocation mode, according to one embodiment of the present disclosure.

[0014] FIG. 9 illustrates three cast types according to one embodiment of the present disclosure.

[0015] FIG. 10 illustrates a synchronization source or synchronization reference of V2X according to one embodiment of the present disclosure.

[0016] FIG. 11 illustrates an example of an architecture in a 5G system capable of positioning a UE connected to a Next Generation-Radio Access Network (NG-RAN) or E-UTRAN, according to one embodiment of the present disclosure.

[0017] FIG. 12 illustrates an implementation example of a network for measuring the location of a UE according to one embodiment of the present disclosure.

[0018] FIG. 13 illustrates an example of a protocol layer used to support LPP (LTE Positioning Protocol) message transmission between an LMF and a UE according to one embodiment of the present disclosure.

[0019] FIG. 14 illustrates an example of a protocol layer used to support NR Positioning Protocol A (NRPPa) PDU transmission between an LMF and an NG-RAN node according to one embodiment of the present disclosure.

[0020] FIG. 15 is a diagram for explaining an OTDOA (Observed Time Difference Of Arrival) positioning method according to one embodiment of the present disclosure.

[0021] FIG. 16 is a diagram for explaining a double-side RTT positioning method according to one embodiment of the present disclosure.

[0022] FIG. 17 is a diagram for explaining a problem of a method for performing wireless communication according to an embodiment of the present disclosure.

[0023] FIG. 18 is a diagram for explaining a procedure for performing wireless communication according to an embodiment of the present disclosure.

[0024] FIG. 19 is a diagram illustrating a method for a first device to perform wireless communication according to an embodiment of the present disclosure.

[0025] FIG. 20 is a diagram illustrating a method for a second device to perform wireless communication according to an embodiment of the present disclosure.

[0026] Fig. 21 shows a communication system (1) according to one embodiment of the present disclosure.

[0027] FIG. 22 illustrates a wireless device according to one embodiment of the present disclosure.

[0028] FIG. 23 illustrates a signal processing circuit for a transmission signal according to one embodiment of the present disclosure.

[0029] FIG. 24 illustrates a wireless device according to one embodiment of the present disclosure.

[0030] FIG. 25 illustrates a portable device according to one embodiment of the present disclosure.

[0031] FIG. 26 illustrates a vehicle or autonomous vehicle according to one embodiment of the present disclosure.

[0032] As used herein, "A or B" can mean "only A," "only B," or "both A and B." In other words, as used herein, "A or B" can be interpreted as "A and / or B." For example, as used herein, "A, B or C" can mean "only A," "only B," "only C," or "any combination of A, B and C."

[0033] As used herein, a slash ( / ) or a comma can mean "and / or." For example, "A / B" can mean "A and / or B." Accordingly, "A / B" can mean "only A," "only B," or "both A and B." For example, "A, B, C" can mean "A, B, or C."

[0034] In this specification, "at least one of A and B" may mean "only A", "only B" or "both A and B". Additionally, in this specification, the expressions "at least one of A or B" or "at least one of A and / or B" may be interpreted identically to "at least one of A and B".

[0035] Additionally, in this specification, “at least one of A, B and C” can mean “only A,” “only B,” “only C,” or “any combination of A, B and C.” Additionally, “at least one of A, B or C” or “at least one of A, B and / or C” can mean “at least one of A, B and C.”

[0036] Additionally, parentheses used herein may mean "for example." Specifically, when indicated as "control information (PDCCH)", "PDCCH" may be proposed as an example of "control information." In other words, "control information" in this specification is not limited to "PDCCH," and "PDCCH" may be proposed as an example of "control information." Furthermore, even when indicated as "control information (i.e., PDCCH)", "PDCCH" may be proposed as an example of "control information."

[0037] In the following explanation, ‘when, if, in case of’ can be replaced with ‘based on’.

[0038] Technical features individually described in a single drawing in this specification may be implemented individually or simultaneously.

[0039] In this specification, higher layer parameters may be parameters that are set for the terminal, preset, or predefined. For example, a base station or network may transmit higher layer parameters to the terminal. For example, higher layer parameters may be transmitted via radio resource control (RRC) signaling or medium access control (MAC) signaling.

[0040] In this specification, "configured or defined" may be interpreted as being configured or preset to a device through predefined signaling (e.g., SIB, MAC, RRC) from a base station or network. In this specification, "configured or defined" may be interpreted as being preset to a device.

[0041] The technology proposed in this specification 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 with wireless technologies such as UTRA (universal terrestrial radio access) or CDMA2000. TDMA can be implemented with 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 with 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.

[0042] The technology proposed in this specification can be implemented with 6G wireless technology and applied to various 6G systems. For example, 6G systems can have key factors such as enhanced mobile broadband (eMBB), ultra-reliable low latency communications (URLLC), massive machine-type communication (mMTC), artificial intelligence (AI) integrated communication, tactile internet, high throughput, high network capacity, high energy efficiency, low backhaul and access network congestion, and enhanced data security.

[0043] FIG. 1 illustrates a communication structure that can be provided in a 6G system according to one embodiment of the present disclosure. The embodiment of FIG. 1 can be combined with various embodiments of the present disclosure.

[0044] New network characteristics in 6G may include:

[0045] - Satellite integrated network

[0046] - Connected Intelligence: Unlike previous generations of wireless communication systems, 6G is revolutionary, upgrading the wireless evolution from "connected objects" to "connected intelligence." AI can be applied at every stage of the communication process (or at every signal processing step, as described below).

[0047] - Seamless integration of wireless information and energy transfer

[0048] - Ubiquitous super 3D connectivity: Access to networks and core network functions of drones and very low Earth orbit satellites will create super 3D connectivity in 6G ubiquitous.

[0049] Some general requirements for the new network characteristics of 6G, such as the above, may be as follows:

[0050] - small cell networks

[0051] - Ultra-dense heterogeneous network

[0052] - High-capacity backhaul

[0053] - Radar technology integrated with mobile technology: High-precision localization (or location-based services) through communications is a key feature of 6G wireless communication systems. Therefore, radar systems will be integrated with 6G networks.

[0054] - Softwarization and virtualization

[0055] Below, the core implementation technologies of the 6G system are described.

[0056] - Artificial Intelligence: Incorporating AI into communications can streamline and improve real-time data transmission. AI can use numerous analytics to determine how complex target tasks should be performed. This means AI can increase efficiency and reduce processing delays. Time-consuming tasks such as handovers, network selection, and resource scheduling can be performed instantly using AI. AI can also play a crucial role in machine-to-machine (M2M), machine-to-human, and human-to-machine communications. Furthermore, AI can facilitate rapid communication in brain-computer interfaces (BCIs). AI-based communication systems can be supported by metamaterials, intelligent structures, intelligent networks, intelligent devices, intelligent cognitive radios, self-sustaining wireless networks, and machine learning.

[0057] - THz communication (terahertz communication): Data rates can be increased by increasing the bandwidth. This can be achieved by utilizing sub-THz communication with a wide bandwidth and applying advanced massive MIMO technology. THz waves, also known as sub-millimeter waves, typically refer to the frequency range between 0.1 THz and 10 THz with corresponding wavelengths ranging from 0.03 mm to 3 mm. The 100 GHz to 300 GHz band (Sub-THz band) is considered a major portion of the THz band for cellular communications. Adding the Sub-THz band to the mmWave band will increase the capacity of 6G cellular communications. Among the defined THz bands, 300 GHz to 3 THz lies in the far infrared (IR) frequency band. While part of the optical band, the 300 GHz to 3 THz band lies at the boundary of the optical band, immediately following the RF band. Therefore, this 300 GHz to 3 THz band exhibits similarities to RF. Figure 2 illustrates the electromagnetic spectrum according to one embodiment of the present disclosure. The embodiment of FIG. 2 can be combined with various embodiments of the present disclosure. Key characteristics of THz communications include (i) a widely available bandwidth to support very high data rates, and (ii) high path loss at high frequencies (highly directional antennas are essential). The narrow beamwidth generated by the highly directional antenna reduces interference. The small wavelength of THz signals allows for a much larger number of antenna elements to be integrated into devices and base stations operating in this band. This enables the use of advanced adaptive array technologies to overcome range limitations.

[0058] - Large-scale MIMO technology

[0059] - Hologram beamforming (HBF)

[0060] - Optical wireless technology

[0061] - Free-space optical transmission backhaul network (FSO backhaul network)

[0062] - Quantum communication

[0063] - Cell-free communication

[0064] - Integration of wireless information and power transmission

[0065] - Integration of wireless communication and sensing

[0066] - Integrated access and backhaul network

[0067] - Big data analysis

[0068] - Reconfigurable intelligent surface

[0069] - metaverse

[0070] - Blockchain

[0071] Unmanned aerial vehicles (UAVs): UAVs, or drones, will be a key element in 6G wireless communications. In most cases, high-speed data wireless connectivity can be provided using UAV technology. Base stations (BSs) can be installed on UAVs to provide cellular connectivity. UAVs may offer specific capabilities not found in fixed BS infrastructure, such as easy deployment, robust line-of-sight links, and controlled mobility. During emergencies such as natural disasters, deploying terrestrial communications infrastructure is not economically feasible and sometimes cannot provide services in volatile environments. UAVs can easily handle these situations. UAVs will become a new paradigm in wireless communications. This technology facilitates three fundamental requirements for wireless networks: enhanced mobile broadband (eMBB), URLLC, and mMTC. UAVs can also support various purposes, such as enhancing 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 communications.

[0072] - Advanced air mobility (AAM): AAM is a higher concept than urban air mobility (UAM), which is an air transportation method available in urban areas, and can refer to a means of transportation that includes movement between regional hubs as well as within urban areas.

[0073] - Autonomous driving (self-driving): V2X (vehicle to everything), a key element in building autonomous driving infrastructure, can be a technology that allows cars to communicate and share with various elements on the road for autonomous driving, such as vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) wireless communication. Fast transmission speeds and low-latency technologies are essential to maximize autonomous driving performance and ensure high safety. Furthermore, in the future, autonomous driving will go beyond simply providing warnings or guidance messages to drivers and may require active intervention in vehicle operation and direct control of the vehicle in dangerous situations. To this end, the amount of information that needs to be transmitted and received may become enormous, so 6G is expected to maximize autonomous driving with faster transmission speeds and lower latency than 5G.

[0074] - Non-terrestrial networks (NTN): NTN may refer to a network or network segment that uses radio frequency (RF) resources mounted on a satellite (or unmanned aerial system (UAS) platform). FIG. 3 illustrates an example of a typical NTN scenario based on a transparent payload according to an embodiment of the present disclosure. FIG. 4 illustrates an example of a typical NTN scenario based on a regenerative payload according to an embodiment of the present disclosure. The embodiments of FIG. 3 or FIG. 4 may be combined with various embodiments of the present disclosure. Referring to FIG. 3, a satellite (or UAS platform) may create a service link with a UE. The satellite (or UAS platform) may be connected to a gateway via a feeder link. The satellite may be connected to a data network via the gateway. A beam footprint may refer to an area where a signal transmitted by a satellite can be received. Referring to Figure 4, a satellite (or UAS platform) can establish a service link with a UE. A satellite (or UAS platform) connected to a UE can be connected to another satellite (or UAS platform) via an inter-satellite link (ISL). The other satellite (or UAS platform) can be connected to a gateway via a feeder link. Based on the playback payload, a satellite can be connected to a data network through another satellite and the gateway. If an ISL does not exist between a satellite and another satellite, a feeder link between the satellite and the gateway may be required. Figures 3 and 4 are merely examples of NTN scenarios, and NTN can be implemented based on various scenarios.For example, a satellite (or UAS platform) may implement a transparent or regenerative (with onboard processing) payload. For example, a satellite (or UAS platform) may generate multiple beams over a designated service area depending on the field of view of the satellite (or UAS platform). For example, the field of view of the satellite (or UAS platform) may vary depending on the onboard antenna diagram and minimum 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, and coding / modulation. For example, a regenerative payload may be substantially equivalent to equipping the satellite (or UAS platform) with all or part of the base station functionality.

[0075] - 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 the environment. Because radio frequency sensing does not require a device to connect to the object through a network, it can provide a service for object positioning without a device. The ability to obtain range, velocity, and angle information from radio frequency signals can enable a wide range of new capabilities, such as various object detection, object recognition (e.g., vehicles, humans, animals, UAVs), and high-precision localization, tracking, and activity recognition. Wireless sensing services can provide information to a variety of industries (e.g., drones, smart homes, V2X, factories, railways, public safety, etc.), enabling applications such as intruder detection, assisted vehicle steering and navigation, trajectory tracking, collision avoidance, traffic management, and health and traffic management. In some cases, wireless sensing can utilize non-3GPP type sensors (e.g., radar, cameras) to further support 3GPP-based sensing. For example, the operation of a wireless sensing service, i.e., a sensing operation, may depend on the transmission, reflection, and scattering of wireless sensing signals. Therefore, wireless sensing may provide an opportunity to enhance existing communication systems from a communication network to a wireless communication and sensing network. FIG. 5 illustrates an example of a sensing operation according to an embodiment of the present disclosure. The embodiment of FIG. 5 may be combined with various embodiments of the present disclosure. Specifically, FIG. 5 (a) illustrates an example of sensing using a sensing receiver and a sensing transmitter located at the same location (e.g., monostatic sensing), and FIG. 5 (b) illustrates an example of sensing using a separated sensing receiver and a sensing transmitter (e.g., bistatic sensing).

[0076] The layers of the radio interface protocol between the terminal and the 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. Among these, the physical layer belonging to layer 1 provides an information transfer service using a physical channel, and the RRC (Radio Resource Control) layer located in layer 3 controls radio resources between the terminal and the network. To this end, the RRC layer exchanges RRC messages between the terminal and the base station.

[0077] The physical layer provides information transmission services to higher layers using physical channels. The physical layer is connected to the upper layer, the Medium Access Control (MAC) layer, via a transport channel. Data travels between the MAC layer and the physical layer through the transport channel. Transport channels are classified based on how and with what characteristics data is transmitted over the wireless interface.

[0078] Data travels between different physical layers, i.e., between the physical layers of a transmitter and a receiver, via a physical channel. This physical channel can be modulated using Orthogonal Frequency Division Multiplexing (OFDM) and utilizes time and frequency as radio resources.

[0079] The MAC layer provides services to the upper layer, the radio link control (RLC) layer, through logical channels. The MAC layer provides mapping from multiple logical channels to multiple transport channels. Furthermore, the MAC layer provides logical channel multiplexing, which maps multiple logical channels to a single transport channel. The MAC sublayer provides data transmission services on logical channels.

[0080] The RLC layer performs the concatenation, segmentation, and reassembly of RLC Service Data Units (SDUs). To guarantee the various Quality of Service (QoS) required by radio bearers (RBs), the RLC layer provides three operating modes: Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM). AM RLC provides error correction through automatic repeat request (ARQ).

[0081] The RRC (Radio Resource Control) layer is defined only in the control plane. The RRC layer is responsible for controlling logical channels, transport channels, and physical channels, related to the configuration, reconfiguration, and release of radio bearers. RB refers to a logical path provided by Layer 1 (physical layer or PHY layer) and Layer 2 (MAC layer, RLC layer, Packet Data Convergence Protocol (PDCP) layer, and Service Data Adaptation Protocol (SDAP) layer) for data transmission between the terminal and the network.

[0082] The functions of the PDCP layer in the user plane include the transmission of user data, header compression, and ciphering. The functions of the PDCP layer in the control plane include the transmission of control plane data and encryption / integrity protection.

[0083] The Service Data Adaptation Protocol (SDAP) layer is defined only in the user plane. It performs mapping between QoS flows and data radio bearers, marking QoS flow identifiers (IDs) within downlink and uplink packets, and more.

[0084] Establishing an RB refers to the process of defining the characteristics of the radio protocol layer and channel to provide a specific service, and setting specific parameters and operating methods for each. RBs can be further divided into two types: the Signaling Radio Bearer (SRB) and the Data Radio Bearer (DRB). The SRB is used as a channel to transmit RRC messages in the control plane, while the DRB is used as a channel to transmit user data in the user plane.

[0085] When an RRC connection is established between the RRC layer of the terminal and the RRC layer of the base station, the terminal is in the RRC_CONNECTED state. Otherwise, it is in the RRC_IDLE state. For NR, the RRC_INACTIVE state is additionally defined, and a terminal in the RRC_INACTIVE state can maintain a connection with the core network while releasing the connection with the base station.

[0086] Downlink transmission channels that transmit data from the network to the terminal include the Broadcast Channel (BCH), which transmits system information, and the downlink Shared Channel (SCH), which transmits user traffic or control messages. Traffic or control messages for downlink multicast or broadcast services may be transmitted through the downlink SCH or a separate downlink Multicast Channel (MCH). Meanwhile, uplink transmission channels that transmit data from the terminal to the network include the Random Access Channel (RACH), which transmits initial control messages, and the uplink Shared Channel (SCH), which transmits user traffic or control messages.

[0087] Logical channels that are located above the transport channel and are mapped to the transport channel include the Broadcast Control Channel (BCCH), Paging Control Channel (PCCH), Common Control Channel (CCCH), Multicast Control Channel (MCCH), and Multicast Traffic Channel (MTCH).

[0088] Radio frames can be used for uplink and downlink transmission. A radio frame has a length of 10 ms and can be defined as two 5 ms half-frames (HF). A half-frame can contain five 1 ms 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, depending on the cyclic prefix (CP).

[0089] When normal CP is used, each slot can contain 14 symbols. When extended CP is used, each slot can contain 12 symbols. Here, the 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).

[0090] The following Table 2 shows the number of symbols per slot (Nslotsymb) and the number of slots per frame (N) depending on the SCS setting (u) when normal CP or extended CP is used. frame,u slot ) and the number of slots per subframe (N subframe,u slot ) is an example.

[0091] CP type SCS (15*2 u )N slot symb N frame,u slot N subframe,u slot Normal CP15kHz (u=0)1410130kHz (u=1)1420260kHz (u=2)14404120kHz (u=3)14808240kHz (u=4)1416016Extended CP60kHz (u=2)12404

[0092] FIG. 6 illustrates a slot structure of a frame according to an embodiment of the present disclosure. The embodiment of FIG. 6 can be combined with various embodiments of the present disclosure.

[0093] Referring to FIG. 6, a slot includes a plurality of symbols in the time domain. A carrier includes a plurality of subcarriers in the frequency domain. An RB (Resource Block) may be defined as a plurality (e.g., 12) of consecutive subcarriers in the frequency domain. A BWP (Bandwidth Part) may be defined as a plurality of consecutive (P)RBs ((Physical) Resource Blocks) in the frequency domain, and may correspond to one numerology (e.g., SCS, CP length, etc.). A carrier may include up to N (e.g., 5) BWPs. Data communication may be performed through activated BWPs. Each element may be referred to as a Resource Element (RE) in the resource grid, and one complex symbol may be mapped to it.

[0094] A Bandwidth Part (BWP) can be a contiguous set of physical resource blocks (PRBs) for a given numerology. A PRB can be selected from a contiguous subset of common resource blocks (CRBs) for a given numerology on a given carrier.

[0095] FIG. 7 illustrates an example of a BWP according to an embodiment of the present disclosure. The embodiment of FIG. 7 can be combined with various embodiments of the present disclosure. In the embodiment of FIG. 7, it is assumed that there are three BWPs.

[0096] Referring to Figure 7, a common resource block (CRB) may be a carrier resource block numbered from one end of a carrier band to the other. Furthermore, a PRB may be a numbered resource block within each BWP. Point A may indicate a common reference point for the resource block grid.

[0097] BWP is point A, offset from point A (N start BWP ) and bandwidth (N size BWP ) can be set by. For example, point A can be an outer reference point of the PRB of a carrier where subcarrier 0 of all numerologies (e.g., all numerologies supported by the network on that carrier) aligns. For example, the offset can be the PRB spacing between the lowest subcarrier in a given numerology and point A. For example, the bandwidth can be the number of PRBs in a given numerology.

[0098] SLSS (Sidelink Synchronization Signal) is a SL (sidelink) specific sequence and may include PSSS (Primary Sidelink Synchronization Signal) and SSSS (Secondary Sidelink Synchronization Signal). The PSSS may be referred to as S-PSS (Sidelink Primary Synchronization Signal) and the SSSS may be referred to as S-SSS (Sidelink Secondary Synchronization Signal). For example, length-127 M-sequences may be used for S-PSS and length-127 Gold sequences may be used for S-SSS. For example, a terminal may detect an initial signal (signal detection) and obtain synchronization using S-PSS. For example, the terminal can obtain detailed synchronization using S-PSS and S-SSS and detect a synchronization signal ID.

[0099] PSBCH (Physical Sidelink Broadcast Channel) may be a (broadcast) channel that transmits basic (system) information that a terminal must know first before transmitting or receiving an SL signal. For example, the basic information may be information related to SLSS, duplex mode (DM), TDD UL / DL (Time Division Duplex Uplink / Downlink) configuration, resource pool-related information, type of application related to SLSS, subframe offset, broadcast information, etc. For example, in order to evaluate PSBCH performance, in NR V2X, the payload size of PSBCH may be 56 bits, including a 24-bit CRC (Cyclic Redundancy Check).

[0100] S-PSS, S-SSS and PSBCH may be included in a block format supporting periodic transmission (e.g., SL SS (Synchronization Signal) / PSBCH block, hereinafter referred to as S-SSB (Sidelink-Synchronization Signal Block)). The S-SSB may have the same numerology (i.e., SCS and CP length) as the PSCCH (Physical Sidelink Control Channel) / PSSCH (Physical Sidelink Shared Channel) in the carrier, and the transmission bandwidth may be within a (pre-)configured SL BWP (Sidelink BWP). For example, the bandwidth of the S-SSB may be 11 RBs (Resource Blocks). For example, the PSBCH may span 11 RBs. And, the frequency location of the S-SSB may be (pre-)configured. Therefore, the terminal does not need to perform hypothesis detection in the frequency to discover the S-SSB in the carrier.

[0101] In this specification, PSCCH may be replaced by a control channel, a physical control channel, a control channel associated with a sidelink, a physical control channel associated with a sidelink, etc. In this specification, PSSCH may be replaced by a shared channel, a physical shared channel, a shared channel associated with a sidelink, a physical shared channel associated with a sidelink, etc.

[0102] FIG. 8 illustrates a procedure for a terminal to perform V2X or SL communication according to a resource allocation mode, according to one embodiment of the present disclosure. The embodiment of FIG. 8 may be combined with various embodiments of the present disclosure.

[0103] Referring to (a) of FIG. 8, in resource allocation mode 1, the base station may schedule SL resources to be used by the terminal for SL transmission. For example, in step S800, the base station may transmit information related to SL resources and / or information related to 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.

[0104] For example, a first terminal may receive information related to a dynamic grant (DG) resource and / or information related to a configured grant (CG) resource from a base station. 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 a base station configures / allocates to the first terminal via downlink control information (DCI). In this specification, a CG resource may be a (periodic) resource that a base station configures / allocates to the first terminal via DCI and / or an RRC message. For example, in the case of a CG type 1 resource, the base station may transmit an RRC message including 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 transmit an RRC message including information related to the CG resource to the first terminal, and the base station may transmit a DCI related to activation or release of the CG resource to the first terminal.

[0105] In step S810, the first terminal may transmit a PSCCH (e.g., Sidelink Control Information (SCI) or 1st-stage SCI) to the second terminal based on the resource scheduling. In step S820, the first terminal may transmit a PSSCH (e.g., 2nd-stage SCI, MAC PDU, data, etc.) related to the PSCCH to the second terminal. In step S830, the first terminal may receive a PSFCH related to the PSCCH / PSSCH from the second terminal. For example, HARQ feedback information (e.g., NACK information or ACK information) may be received from the second terminal via the PSFCH. In step S840, the first terminal may transmit / report HARQ feedback information to the base station via a PUCCH or a 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 a rule set in advance. For example, the DCI may be DCI for scheduling SL.

[0106] Referring to (b) of FIG. 8, in resource allocation mode 2, the terminal can determine SL transmission resources within SL resources set by the base station / network or preset SL resources. For example, the set SL resources or preset 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 perform SL communication by selecting resources by itself within the set resource pool. For example, the terminal can select resources by itself within a selection window by performing sensing and resource (re)selection procedures. For example, the sensing can be performed on a subchannel basis. For example, in step S810, the first terminal that has selected resources by itself within the resource pool transmits PSCCH (e.g., SCI (Sidelink Control Information) or 1) using the resources. st -stage SCI) can be transmitted to the second terminal. In step S820, the first terminal transmits the PSSCH (e.g., 2) related to the PSCCH. nd -stage SCI, MAC PDU, data, etc.) can be transmitted to the second terminal. In step S830, the first terminal can receive a PSFCH related to the PSCCH / PSSCH from the second terminal.

[0107] Referring to (a) or (b) of FIG. 8, for example, a first terminal may transmit an SCI to a second terminal on a PSCCH. Or, for example, the first terminal may transmit two consecutive SCIs (e.g., 2-stage SCIs) to the second terminal on the PSCCH and / or the PSSCH. In this case, the second terminal may decode the two consecutive SCIs (e.g., 2-stage SCIs) to receive the PSSCH from the first terminal. In the present specification, an SCI transmitted on a PSCCH is 1 st SCI, 1st SCI, 1st -stage SCI or 1 st -stage SCI format, and the SCI transmitted on the PSSCH is 2 nd SCI, 2nd SCI, 2 nd -stage SCI or 2 nd -It can be called a stage SCI format.

[0108] Referring to (a) or (b) of FIG. 8, in step S830, the first terminal may receive a PSFCH. For example, the first terminal and the second terminal may determine PSFCH resources, and the second terminal may use the PSFCH resources to transmit HARQ feedback to the first terminal.

[0109] Referring to (a) of FIG. 8, in step S840, the first terminal may transmit SL HARQ feedback to the base station via PUCCH and / or PUSCH.

[0110] Below, an example of a frequency range of a wireless communication system is described.

[0111] A frequency band can be defined by two types of frequency ranges. The two types of frequency ranges can be FR1 and FR2 (FR2-1 and / or FR2-2). The numerical values ​​of the frequency ranges can be changed, and for example, the two types of frequency ranges can be as shown in Table 3 below. Among the frequency ranges used in communication systems, FR1 can mean the "sub 6 GHz range", and FR2 can mean the "above 6 GHz range" and can be called millimeter wave (mmW).

[0112] Frequency Range designationCorresponding frequency rangeSubcarrier Spacing (SCS)FR1450MHz - 6000MHz15, 30, 60kHzFR224250MHz - 52600MHz60, 120, 240kHz

[0113] As described above, the numerical value of the frequency range of a wireless communication system can be changed. For example, FR1 may include a band from 410 MHz to 7125 MHz, as shown in Table 4 below. That is, FR1 may include a frequency band above 6 GHz (or 5850, 5900, 5925 MHz, etc.). For example, the frequency band above 6 GHz (or 5850, 5900, 5925 MHz, etc.) included within FR1 may include an unlicensed band. Unlicensed bands may be used for various purposes, such as for vehicular communications (e.g., autonomous driving).

[0114] Frequency Range designationCorresponding frequency rangeSubcarrier Spacing (SCS)FR1410MHz - 7125MHz15, 30, 60kHzFR2 (FR 2-1)24250MHz - 52600MHz60, 120, 240kHzFR2 (FR 2-2)52600MHz - 71000MHz60, 120, 240, 480, 960 kHz

[0115] Below, an example of SCI format 1-A is described.

[0116] SCI format 1-A is used for scheduling PSSCH and 2nd-stage SCI on PSSCH.

[0117] The following information is transmitted using SCI Format 1-A.

[0118] - Priority - 3 bits

[0119] - Frequency resource allocation - If the value of the upper layer parameter sl-MaxNumPerReserve is set to 2, then ceiling (log2(N SL subChannel(N SL subChannel+1) / 2)) bits; otherwise, if the value of the upper layer parameter sl-MaxNumPerReserve is set to 3, ceiling log2(N SL subChannel(N SL subChannel+1)(2N SL subChannel+1) / 6) bits

[0120] - Time resource allocation - 5 bits if the value of the upper layer parameter sl-MaxNumPerReserve is set to 2; otherwise, 9 bits if the value of the upper layer parameter sl-MaxNumPerReserve is set to 3.

[0121] - Resource reservation cycle - ceiling (log2N) rsv_period ) bits, where N rsv_period The number of entries in the upper layer parameter sl-ResourceReservePeriodList if the upper layer parameter sl-MultiReserveResource is set; otherwise, 0 bits.

[0122] - DMRS pattern - ceiling (log2N pattern ) bits, where N pattern is the number of DMRS patterns set by the upper layer parameter sl-PSSCH-DMRS-TimePatternList.

[0123] - 2 nd -stage SCI format - 2 bits as defined in Table 5

[0124] - Beta_Offsets indicator - 2 bits as provided by the upper layer parameter sl-BetaOffsets2ndSCI

[0125] - Number of DMRS ports - 1 bit as defined in Table 6

[0126] - Modulation and coding method - 5 bits

[0127] - Additional MCS table indicator - 1 bit if one MCS table is set by the upper layer parameter sl-Additional-MCS-Table; 2 bits if two MCS tables are set by the upper layer parameter sl-Additional-MCS-Table; otherwise 0 bits

[0128] - PSFCH Overhead Indicator - 1 bit if the upper layer parameter sl-PSFCH-Period = 2 or 4; otherwise 0 bit

[0129] - Reserved bits - The number of bits determined by the upper layer parameter sl-NumReservedBits, whose value is set to 0.

[0130] Value of 2nd-stage SCI format field2nd-stage SCI format00SCI format 2-A01SCI format 2-B10Reserved11Reserved

[0131] Value of the Number of DMRS port fieldAntenna ports0100011000 and 1001

[0132] Below, an example of SCI format 2-A is described.

[0133] In HARQ operation, when HARQ-ACK information contains ACK or NACK, or when HARQ-ACK information contains only NACK, or when there is no feedback of HARQ-ACK information, SCI format 2-A is used for decoding PSSCH.

[0134] The following information is transmitted via SCI Format 2-A.

[0135] - HARQ process number - 4 bits

[0136] - New data indicator - 1 bit

[0137] - Redundancy version - 2 bits

[0138] - Source ID - 8 bits

[0139] - Destination ID - 16 bits

[0140] - HARQ feedback enable / disable indicator - 1 bit

[0141] - Cast type indicator - 2 bits as defined in Table 7

[0142] - CSI request - 1 bit

[0143] Value of Cast type indicatorCast type00Broadcast01Groupcast when HARQ-ACK information includes ACK or NACK10Unicast11Groupcast when HARQ-ACK information includes only NACK

[0144] Below, an example of SCI format 2-B is described.

[0145] In HARQ operation, when HARQ-ACK information contains only NACK or there is no feedback of HARQ-ACK information, SCI format 2-B is used for decoding PSSCH.

[0146] The following information is transmitted via SCI Format 2-B.

[0147] - HARQ process number - 4 bits

[0148] - New data indicator - 1 bit

[0149] - Redundancy version - 2 bits

[0150] - Source ID - 8 bits

[0151] - Destination ID - 16 bits

[0152] - HARQ feedback enable / disable indicator - 1 bit

[0153] - Zone ID - 12 bits

[0154] - Communication range requirement - 4 bits determined by the upper layer parameter sl-ZoneConfigMCR-Index

[0155] Referring to (a) or (b) of FIG. 8, in step S830, the first terminal may receive a PSFCH. For example, the first terminal and the second terminal may determine PSFCH resources, and the second terminal may use the PSFCH resources to transmit HARQ feedback to the first terminal.

[0156] Referring to (a) of FIG. 8, in step S840, the first terminal may transmit SL HARQ feedback to the base station via PUCCH and / or PUSCH.

[0157] FIG. 9 illustrates three cast types according to an embodiment of the present disclosure. The embodiment of FIG. 9 can be combined with various embodiments of the present disclosure. Specifically, FIG. 9 (a) illustrates broadcast-type SL communication, FIG. 9 (b) illustrates unicast-type SL communication, and FIG. 9 (c) illustrates groupcast-type SL communication. In the case of unicast-type SL communication, a terminal can perform one-to-one communication with another terminal. In the case of groupcast-type SL communication, a terminal can perform SL communication with one or more terminals within the group to which it belongs. In various embodiments of the present disclosure, SL groupcast communication can be replaced with SL multicast communication, SL one-to-many communication, etc.

[0158] Below, the HARQ (Hybrid Automatic Repeat Request) procedure is described.

[0159] For example, SL HARQ feedback can be enabled for unicast. In this case, in non-CBG (non-Code Block Group) operation, if a receiving terminal decodes a PSCCH targeting the receiving terminal and successfully decodes a transport block associated with the PSCCH, the receiving terminal can generate a HARQ-ACK. Then, the receiving terminal can transmit the HARQ-ACK to the transmitting terminal. On the other hand, if the receiving terminal fails to successfully decode a transport block associated with the PSCCH after decoding a PSCCH targeting the receiving terminal, the receiving terminal can generate a HARQ-NACK. Then, the receiving terminal can transmit the HARQ-NACK to the transmitting terminal.

[0160] For example, SL HARQ feedback can be enabled for groupcast. For example, in non-CBG operation, two HARQ feedback options can be supported for groupcast.

[0161] (1) Groupcast Option 1: If the receiving terminal fails to decode a transport block associated with the PSCCH after decoding a PSCCH targeting the receiving terminal, the receiving terminal may transmit a HARQ-NACK to the transmitting terminal via the PSFCH. On the other hand, if the receiving terminal decodes a PSCCH targeting the receiving terminal and successfully decodes a transport block associated with the PSCCH, the receiving terminal may not transmit a HARQ-ACK to the transmitting terminal.

[0162] (2) Groupcast Option 2: After the receiving terminal decodes the PSCCH targeting the receiving terminal, if the receiving terminal fails to decode the transport block associated with the PSCCH, the receiving terminal can transmit a HARQ-NACK to the transmitting terminal via the PSFCH. Then, if the receiving terminal decodes the PSCCH targeting the receiving terminal and successfully decodes the transport block associated with the PSCCH, the receiving terminal can transmit a HARQ-ACK to the transmitting terminal via the PSFCH.

[0163] For example, if Groupcast Option 1 is used for SL HARQ feedback, all terminals performing groupcast communication can share PSFCH resources. For example, terminals belonging to the same group can transmit HARQ feedback using the same PSFCH resources.

[0164] For example, if Groupcast Option 2 is used for SL HARQ feedback, each terminal performing Groupcast communication can use different PSFCH resources for HARQ feedback transmission. For example, terminals belonging to the same group can transmit HARQ feedback using different PSFCH resources.

[0165] In this specification, HARQ-ACK may be referred to as ACK, ACK information, or positive-ACK information, and HARQ-NACK may be referred to as NACK, NACK information, or negative-ACK information.

[0166] Below, the UE procedure for reporting HARQ-ACK on the sidelink is described.

[0167] In response to receiving the PSSCH, the UE transmits a PSFCH containing HARQ-ACK information, N PSSCH subchThe SCI format may be indicated by scheduling PSSCH reception on one or more subchannels from the subchannel number. The UE provides HARQ-ACK information including ACK, NACK, or NACK only.

[0168] The UE may be provided with the number of slots in the resource pool for PSFCH transmission occasion resources by sl-PSFCH-Period-r16. If the number is 0, PSFCH transmission from the UE in the resource pool is disabled. The UE may be provided with k mod N PSFCH PSSCH = 0 if slot t' k SL (0 ≤ k < T' max ) is expected to have PSFCH transmission opportunity resources, where t' k SL is a slot belonging to the resource pool, and T' max is the number of slots belonging to the resource pool within 10240 msec, and N PSFCH PSSCH is provided in sl-PSFCH-Period-r16. The UE may be instructed by upper layers not to transmit a PSFCH in response to a PSSCH reception. When the UE receives a PSSCH from a resource pool and the HARQ Feedback Enable / Disable indicator field included 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 from the resource pool. The UE transmits the PSFCH in a first slot, wherein the first slot includes a PSFCH resource and is a slot after the minimum number of slots provided by sl-MinTimeGapPSFCH-r16 of the resource pool after the last slot of the PSSCH reception.

[0169] The UE selects a set M of PRBs within the resource pool for PSFCH transmission in the PRBs of the resource pool. PSFCHPRB,set is 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 the number of PSSCH slots associated with PSFCH slots less than or equal to M, the UE PRB,set PSFCH Among PRBs, [(i+j·N PSFCH PSSCH )·M PSFCH subch,slot, (i+1+j·N PSFCH PSSCH )·M PSFCH [subch,slot-1] PRB is allocated to slot i and subchannel j among the PSSCH slots 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 subch , and the assignment starts in ascending order of i and continues in ascending order of j. UE is M PSFCH PRB,set Go N subch ·N PSFCH PSSCH It is expected to be a multiple of .

[0170] The UE determines the number of available PSFCH resources for multiplexing HARQ-ACK information included in the PSFCH transmission. PSFCH PRB,CS = N PSFCH type ·M PSFCH subch,slot·N PSFCH CS is determined by . Here, N PSFCH CS is the number of cyclic shift pairs for the resource pool, and based on instructions from the upper layer,

[0171] - N PSFCH type = 1 and M PSFCH subch,slotPRB is associated with the starting subchannel of the corresponding PSSCH,

[0172] - N PSFCH type = N PSSCH subch Ego and N PSSCH subch ·M PSFCH subch,slotPRB is the N of the corresponding PSSCH PSSCH subch Associated with one or more subchannels among the subchannels.

[0173] PSFCH resources are first N PSFCH type ·M PSFCH subch, slotPRB are indexed in ascending order of PRB index, then N PSFCH CS Among the cyclic shift pairs, they are indexed in ascending order of the cyclic shift pair index.

[0174] The UE, in response to receiving the PSSCH, sends an index of the PSFCH resource for PSFCH transmission (P ID + M ID ) mod R PSFCH PRB,CS is determined by . Here, P ID is the physical layer source ID provided by SCI format 2-A or 2-B for scheduling PSSCH reception, and M ID is the ID of the UE receiving the PSSCH indicated by the upper layer if the UE detects SCI format 2-A with the Cast Type Indicator field value of "01", otherwise M ID is 0.

[0175] UE uses Table 8 to determine N PSFCH CSDetermine the m0 value for calculating the cyclic shift α value from the cyclic shift pair index corresponding to the PSFCH resource index.

[0176] N PSFCH CS m0 cyclic shift pair index 0 cyclic shift pair index 1 cyclic shift pair index 2 cyclic shift pair index 3 cyclic shift pair index 4 cyclic shift pair index 510-----203----3024---6012345

[0177] If the UE detects SCI format 2-A with a cast type indicator field value of "01" or "10" as shown in Table 9, or if the UE detects SCI format 2-B or SCI format 2-A with a cast type indicator field value of "11" as shown in Table 10, the UE calculates the value m for calculating the cyclic shift α value. cs The UE applies one cyclic shift from among the cyclic shift pairs to the sequence used for PSFCH transmission.

[0178] HARQ-ACK Value0 (NACK)1 (ACK)Sequence cyclic shift06

[0179] HARQ-ACK Value0 (NACK)1 (ACK)Sequence cyclic shift0N / A

[0180] Below, the UE procedure for determining a subset of resources to be reported to upper layers in PSSCH resource selection in sidelink resource allocation mode 2 is described.

[0181] In resource allocation mode 2, the upper layer may request the UE to determine a subset of resources from which the upper layer will select resources for PSSCH / PSCCH transmission. To trigger this procedure, in slot n, the upper layer provides the following parameters for the PSSCH / PSCCH transmission.

[0182] - Resource pool from which resources will be reported;

[0183] - L1 priority, prioTX;

[0184] - Remaining PDB (packet delay budget);

[0185] - Number of subchannels L to be used for PSSCH / PSCCH transmission within a slot subCH ;

[0186] - Optionally, resource reservation interval P in msec rsvpTX

[0187] - If a higher 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 higher layer provides a set of resources (r0, r1, r2, ...) that can be subject to re-evaluation and a set of resources (r'0, r'1, r'2, ...) that can be subject to pre-emption.

[0188] - slot r i '' - It is up to the UE implementation to determine the subset of resources requested by the upper layer before or after T3. Where r i '' is the slot with the smallest slot index among (r0, r1, r2, ...) and (r'0, r'1, r'2, ...), and T3 is TSL proc,1 is the same as where T SL proc,1 is defined as the number of slots according to SCS, where μ SL is the SCS configuration of SL BWP.

[0189] The following upper-level parameters influence this procedure:

[0190] - sl-SelectionWindowList: internal parameter T 2minis given prio TX The value is set to the corresponding value from the upper layer parameter sl-SelectionWindowList.

[0191] - sl-Thres-RSRP-List: This upper layer parameter is used to specify each (p i , p j ) provides an RSRP threshold for the combination, where p i is the priority field value included in the received SCI format 1-A and p j is the transmission priority on the resource selected by the UE; in this procedure, p j = prio TX am.

[0192] - sl-RS-ForSensing selects whether the UE uses PSSCH-RSRP or PSCCH-RSRP measurements.

[0193] - sl-ResourceReservePeriodList

[0194] - sl-SensingWindow: The internal parameter T0 is defined as the number of slots corresponding to sl-SensingWindow msec.

[0195] - sl-TxPercentageList: given prio TX The internal parameter X for sl-TxPercentageList(prio) is converted from percentage to ratio. TX ) is defined as.

[0196] - sl-PreemptionEnable: If sl-PreemptionEnable is provided and is not equal to 'enabled', the internal parameter prio pre is set by the parameter sl-PreemptionEnable provided by the upper layer.

[0197] If the resource reservation interval is P rsvp_TXWhen provided, the resource reservation interval is in msec units, or logical slot units P' rsvp_TX is converted to .

[0198] Notation:

[0199] (t' SL 0, t' SL 1, t' SL 2, ...) represents a set of slots belonging to the sidelink resource pool.

[0200] For example, the UE may select a set of candidate resources (S) based on Table 11. A ) can be selected. For example, when resource (re)selection is triggered, the UE selects a set of candidate resources (S) based on Table 11. A ) can be selected. For example, if re-evaluation or pre-emption is triggered, the UE selects a set of candidate resources (S) based on Table 11. A ) can be selected.

[0201]

[0202] Meanwhile, partial sensing may be supported to save power in the UE. For example, in LTE SL or LTE V2X, the UE may perform partial sensing based on Tables 12 and 13.

[0203]

[0204]

[0205] Below, the synchronization acquisition of the SL terminal is described.

[0206] In time division multiple access (TDMA) and frequency division multiple access (FDMA) systems, accurate time and frequency synchronization is essential. If time and frequency synchronization is not accurate, system performance may be degraded due to inter-symbol interference (ISI) and inter-carrier interference (ICI). This is also the case in V2X. In V2X, for time / frequency synchronization, the sidelink synchronization signal (SLSS) can be used in the physical layer, and the master information block-sidelink-V2X (MIB-SL-V2X) can be used in the radio link control (RLC) layer.

[0207] FIG. 10 illustrates a synchronization source or synchronization reference of V2X according to an embodiment of the present disclosure. The embodiment of FIG. 10 can be combined with various embodiments of the present disclosure.

[0208] Referring to Fig. 10, in V2X, a terminal can be directly synchronized to a global navigation satellite system (GNSS), or can be indirectly synchronized to a GNSS through a terminal (within network coverage or outside network coverage) that is directly synchronized to a GNSS. When a GNSS is set as a synchronization source, the terminal can calculate the DFN and subframe number using the Coordinated Universal Time (UTC) and a (pre-)configured DFN offset.

[0209] Alternatively, the terminal may be synchronized directly to the base station, or may be synchronized to another terminal that is time / frequency synchronized to the base station. For example, the base station may be an eNB or a gNB. For example, if the terminal is within network coverage, the terminal may receive synchronization information provided by the base station and be synchronized directly to the base station. Thereafter, the terminal may provide the synchronization information to other adjacent terminals. If the base station timing is set as the synchronization reference, the terminal may follow the cell associated with the frequency (if within cell coverage at the frequency), the primary cell, or the serving cell (if outside cell coverage at the frequency) for synchronization and downlink measurements.

[0210] A base station (e.g., a serving cell) may provide synchronization settings for a carrier used for V2X or SL communications. In this case, the terminal may follow the synchronization settings received from the base station. If the terminal does not detect any cell on the carrier used for V2X or SL communications and does not receive synchronization settings from the serving cell, the terminal may follow the preset synchronization settings.

[0211] Alternatively, the terminal may synchronize with another terminal that has not obtained synchronization information directly or indirectly from the base station or GNSS. The synchronization source and preference may be preset for the terminal. Alternatively, the synchronization source and preference may be set via a control message provided by the base station.

[0212] An SL synchronization source can be associated with a synchronization priority. For example, the relationship between a synchronization source and a synchronization priority can be defined as shown in Table 14 or Table 15. Table 14 or Table 15 is merely an example, and the relationship between a synchronization source and a synchronization priority can be defined in various forms.

[0213]

[0214]

[0215] In Table 11 or Table 12, P0 may denote the highest priority, and P6 may denote the lowest priority. In Table 11 or Table 12, the base station may include at least one of a gNB or an eNB. Whether to use GNSS-based synchronization or base station-based synchronization may be (pre-)configured. In single-carrier operation, the terminal may derive its transmission timing from the available synchronization reference with the highest priority.

[0216] For example, the terminal can (re)select a synchronization reference, and the terminal can obtain synchronization from the synchronization reference. Then, the terminal can perform SL communication (e.g., PSCCH / PSSCH transmission / reception, PSFCH (Physical Sidelink Feedback Channel) transmission / reception, S-SSB transmission / reception, reference signal transmission / reception, etc.) based on the obtained synchronization.

[0217] Below, positioning is explained.

[0218] FIG. 11 illustrates an example architecture in a 5G system capable of positioning a UE connected to a Next Generation Radio Access Network (NG-RAN) or E-UTRAN, according to an embodiment of the present disclosure. The embodiment of FIG. 11 may be combined with various embodiments of the present disclosure.

[0219] Referring to FIG. 11, the AMF may receive a request for location services related to a specific target UE from another entity, such as a Gateway Mobile Location Center (GMLC), or the AMF itself may decide to initiate location services on behalf of a specific target UE. Then, the AMF may transmit a location service request to a Location Management Function (LMF). The LMF, which has received the location service request, may process the location service request and return a processing result, including an estimated location of the UE, to the AMF. Meanwhile, if the location service request is received from another entity, such as a GMLC, other than the AMF, the AMF may forward the processing result received from the LMF to the other entity.

[0220] ng-eNB (new generation evolved-NB) and gNB are network elements of NG-RAN that can provide measurement results for position estimation. They can measure radio signals for target UEs and transmit the results to the LMF. In addition, ng-eNB can control several Transmission Points (TPs), such as remote radio heads (REHs), or PRS-only TPs that support a PRS-based beacon system for E-UTRA.

[0221] The LMF is connected to an Enhanced Serving Mobile Location Center (E-SMLC), and the E-SMLC can enable the LMF to access the E-UTRAN. For example, the E-SMLC can enable the LMF to support Observed Time Difference Of Arrival (OTDOA), one of the positioning methods of the E-UTRAN, by utilizing downlink measurements acquired by the target UE via signals transmitted from the eNB and / or PRS-dedicated TPs in the E-UTRAN.

[0222] Meanwhile, the LMF can be connected to the SUPL Location Platform (SLP). The LMF can support and manage different positioning services for target UEs. The LMF can interact with the serving ng-eNB or serving gNB for the target UE to obtain the position measurement of the UE. For the positioning of the target UE, the LMF can determine the positioning method based on the Location Service (LCS) client type, the required Quality of Service (QoS), the UE positioning capabilities, the gNB positioning capabilities, and the ng-eNB positioning capabilities, and can apply the positioning method to the serving gNB and / or serving ng-eNB. In addition, the LMF can determine the position estimate for the target UE and additional information such as the accuracy of the position estimate and velocity. The SLP is a Secure User Plane Location (SUPL) entity responsible for positioning through the user plane.

[0223] The UE may measure downlink signals from sources such as the NG-RAN and E-UTRAN, different Global Navigation Satellite Systems (GNSS), Terrestrial Beacon Systems (TBS), Wireless Local Access Network (WLAN) access points, Bluetooth beacons, and UE barometric pressure sensors. The UE may include an LCS application, or may access an LCS application through communication with a network to which the UE is connected or through other applications included in the UE. The LCS application may include measurement and calculation functions necessary to determine the location of the UE. For example, the UE may include an independent positioning function, such as a Global Positioning System (GPS), and may report the UE's location independently of NG-RAN transmissions. This independently acquired positioning information may be utilized as supplementary information to the positioning information acquired from the network.

[0224] FIG. 12 illustrates an implementation example of a network for measuring the location of a UE according to one embodiment of the present disclosure. The embodiment of FIG. 12 may be combined with various embodiments of the present disclosure.

[0225] When the AMF receives a location service request while the UE is in the Connection Management - IDLE (CM-IDLE) state, the AMF may establish a signaling connection with the UE and request a network trigger service to allocate a specific serving gNB or ng-eNB. This operation process is omitted in Fig. 12. That is, in Fig. 12, it can be assumed that the UE is in connected mode. However, the signaling connection may be released by the NG-RAN during the positioning process due to reasons such as signaling and data inactivity.

[0226] Referring to FIG. 12, the network operation process for specifically measuring the location of a UE will be described below. In step 1a, a 5GC entity such as a GMLC may request a location service to measure the location of a target UE from a serving AMF. However, even if the GMLC does not request a location service, the serving AMF may determine, according to step 1b, that a location service is necessary to measure the location of the target UE. For example, the serving AMF may decide to directly perform a location service to measure the location of a UE for an emergency call.

[0227] Thereafter, the AMF may transmit a location service request to the LMF according to step 2, and the LMF may initiate location procedures with the serving ng-eNB and the serving gNB according to step 3a to obtain location measurement data or location measurement assistance data. Additionally, the LMF may initiate location procedures for downlink positioning with the UE according to step 3b. For example, the LMF may transmit location assistance data (Assistance data defined in 3GPP TS 36.355) to the UE, or obtain a location estimate or a location measurement. Meanwhile, step 3b may be performed additionally after step 3a is performed, or may be performed instead of step 3a.

[0228] In step 4, the LMF may provide a location service response to the AMF. The location service response may also include information about whether the UE's location estimation was successful and an estimate of the UE's location. If the procedure of FIG. 12 was initiated by step 1a, the AMF may forward the location service response to a 5GC entity, such as the GMLC. If the procedure of FIG. 12 was initiated by step 1b, the AMF may utilize the location service response to provide location services related to emergency calls, etc.

[0229] FIG. 13 illustrates an example of a protocol layer used to support transmission of an LTE Positioning Protocol (LPP) message between an LMF and a UE according to an embodiment of the present disclosure. The embodiment of FIG. 13 may be combined with various embodiments of the present disclosure.

[0230] LPP PDUs can be transmitted via NAS PDUs between AMF and UE. Referring to FIG. 13, LPP can be terminated between a target device (e.g., a UE in the control plane or a SUPL Enabled Terminal (SET) in the user plane) and a location server (e.g., an LMF in the control plane or an SLP in the user plane). LPP messages can be transmitted in the form of transparent PDUs over an intermediate network interface using a suitable protocol, such as NGAP (NG Application Protocol) over the NG-C (NG-Control Plane) interface, NAS / RRC over the LTE-Uu and NR-Uu interfaces. The LPP protocol enables positioning for NR and LTE using various positioning methods.

[0231] For example, via the LPP protocol, a target device and a location server can exchange capability information, auxiliary data for positioning, and / or location information. Additionally, LPP messages can be used to exchange error information and / or indicate the termination of an LPP procedure.

[0232] FIG. 14 illustrates an example of a protocol layer used to support NR Positioning Protocol A (NRPPa) PDU transmission between an LMF and an NG-RAN node according to an embodiment of the present disclosure. The embodiment of FIG. 14 may be combined with various embodiments of the present disclosure.

[0233] NRPPa can be used to exchange information between NG-RAN nodes and LMFs. Specifically, NRPPa can exchange Enhanced-Cell IDs (E-CIDs) for measurements transmitted from ng-eNBs to LMFs, data to support OTDOA positioning methods, Cell-IDs for NR Cell ID positioning methods, and Cell Location IDs. Even if the AMF does not have information about the associated NRPPa transactions, it can route NRPPa PDUs based on the routing ID of the associated LMF through the NG-C interface.

[0234] The NRPPa protocol's procedures for location and data collection can be divided into two types. The first type is a UE-associated procedure for conveying information about a specific UE (e.g., position measurement information, etc.), and the second type is a non-UE-associated procedure for conveying information applicable to NG-RAN nodes and associated TPs (e.g., gNB / ng-eNB / TP timing information, etc.). These two types of procedures may be supported independently or simultaneously.

[0235] Meanwhile, the positioning methods supported by NG-RAN may include GNSS, OTDOA, E-CID (enhanced cell ID), barometric pressure sensor positioning, WLAN positioning, Bluetooth positioning, terrestrial beacon system (TBS), and UTDOA (Uplink Time Difference of Arrival). Among the above positioning methods, the position of the UE may be measured using any one of the positioning methods, but the position of the UE may also be measured using two or more positioning methods.

[0236] (1) OTDOA (Observed Time Difference Of Arrival)

[0237] FIG. 15 is a diagram illustrating an OTDOA (Observed Time Difference Of Arrival) positioning method according to one embodiment of the present disclosure. The embodiment of FIG. 15 can be combined with various embodiments of the present disclosure.

[0238] The OTDOA positioning method utilizes the timing measurements of downlink signals received by the UE from multiple TPs, including the eNB, ng-eNB, and PRS-dedicated TPs. The UE measures the timing of the received downlink signals using location assistance data received from a location server. Based on these measurement results and the geographic coordinates of neighboring TPs, the UE's location can be determined.

[0239] A UE connected to a gNB can request a measurement gap for OTDOA measurements from a TP. If the UE does not recognize a Single Frequency Network (SFN) for at least one TP in the OTDOA assistance data, the UE may use an autonomous gap to obtain the SFN of the OTDOA reference cell before requesting a measurement gap to perform Reference Signal Time Difference (RSTD) measurements.

[0240] Here, the RSTD can be defined based on the smallest relative time difference between the boundaries of two subframes received from the reference cell and the measurement cell, respectively. That is, it can be calculated based on the relative time difference between the start time of the subframe of the reference cell that is closest to the start time of the subframe received from the measurement cell. Meanwhile, the reference cell can be selected by the UE.

[0241] Accurate OTDOA measurement requires measuring the time of arrival (TOA) of signals received from three or more geographically dispersed TPs or base stations. For example, the TOA for TP 1, TP 2, and TP 3 can be measured, and based on the three TOAs, the RSTD for TP 1-TP 2, the RSTD for TP 2-TP 3, and the RSTD for TP 3-TP 1 can be calculated. Based on these, a geometric hyperbola can be determined, and the point where these hyperbolas intersect can be used to estimate the UE's location. In this case, since each TOA measurement may have accuracy and / or uncertainty, the estimated UE's location may be known within a certain range depending on the measurement uncertainty.

[0242] For example, the RSTD for two TPs can be calculated based on Equation 1.

[0243]

[0244] Here, c is the speed of light, and {x t , y t} are the (unknown) coordinates of the target UE, and {x i , y i} are the coordinates of the (known) TP, and {x1, y1} can be the coordinates of the reference TP (or another TP). Here, (T i -T1) is the transmission time offset between two TPs, which can be called "Real Time Differences" (RTDs), and n i , n1 can represent a value related to the UE TOA measurement error.

[0245] (2) E-CID (Enhanced Cell ID)

[0246] In the Cell ID (CID) positioning method, the location of the UE can be measured through geographic information of the UE's serving ng-eNB, serving gNB, and / or serving cell. For example, geographic information of the serving ng-eNB, serving gNB, and / or serving cell can be obtained through paging, registration, etc.

[0247] Meanwhile, the E-CID positioning method may utilize additional UE measurements and / or NG-RAN radio resources in addition to the CID positioning method to improve the UE position estimate. In the E-CID positioning method, some of the same measurement methods as the measurement control system of the RRC protocol may be used, but generally, additional measurements are not performed solely for UE position measurement. In other words, a separate measurement configuration or measurement control message may not be provided to measure the UE's position, and the UE may not expect to be requested to perform additional measurement operations solely for position measurement, and may report measurements obtained through measurement methods generally available to the UE.

[0248] For example, a serving gNB can implement an E-CID positioning method using E-UTRA measurements provided from the UE.

[0249] Examples of measurement elements that can be used for E-CID positioning include:

[0250] - UE measurements: E-UTRA RSRP (Reference Signal Received Power), E-UTRA RSRQ (Reference Signal Received Quality), UE E-UTRA Rx-Tx Time difference, GERAN (GSM EDGE Random Access Network) / WLAN RSSI (Reference Signal Strength Indication), UTRAN CPICH (Common Pilot Channel) RSCP (Received Signal Code Power), UTRAN CPICH Ec / Io

[0251] - E-UTRAN measurements: ng-eNB Rx-Tx Time difference, Timing Advance (TADV), Angle of Arrival (AoA)

[0252] Here, TADV can be divided into Type 1 and Type 2 as follows.

[0253] TADV Type 1 = (ng-eNB RX-TX time difference) + (UE E-UTRA RX-TX time difference)

[0254] TADV Type 2 = ng-eNB receive-transmit time difference

[0255] Meanwhile, AoA can be used to measure the direction of a UE. AoA can be defined as an estimated angle relative to the UE's position in a counterclockwise direction from a base station / TP. In this case, the geographical reference direction may be north. The base station / TP can use uplink signals such as a Sounding Reference Signal (SRS) and / or a Demodulation Reference Signal (DMRS) for AoA measurement. In addition, the larger the antenna array array, the higher the AoA measurement accuracy. When antenna arrays are arranged at equal intervals, signals received from adjacent antenna elements can have a constant phase shift (phase-rotate).

[0256] (3) UTDOA (Uplink Time Difference of Arrival)

[0257] UTDOA is a method for determining the location of a UE by estimating the arrival time of the SRS. When calculating the estimated SRS arrival time, the serving cell is used as a reference cell, and the UE's location can be estimated based on the arrival time difference with other cells (or base stations / TPs). To implement UTDOA, the E-SMLC can designate the serving cell of the target UE to instruct the target UE to transmit SRS. In addition, the E-SMLC can provide configuration settings such as whether the SRS is periodic or aperiodic, bandwidth, and frequency / group / sequence hopping.

[0258] (4) RTT (Round Trip Time)

[0259] RTT is a positioning technology that can measure the distance between a target entity and a server entity even when their time synchronization is not correct. When RTT is performed with multiple server entities, the distance from each server entity is measured individually. Using the measured distance from each server entity, a circle is drawn, and the absolute positioning of the target entity can be determined by the point where each circle intersects.

[0260] Here's how to perform RTT between two entities: If entity #1 transmits PRS #1 at t1, entity #2 receives PRS #1 at t2, and after entity #2 receives PRS #1, entity #2 transmits PRS #2 at t3, and entity #1 receives PRS #2 at t4, then the distance D between the two entities can be calculated as follows.

[0261] D = cx {(t4-t1) - (t3-t2)} / 2 (where c is the speed of light)

[0262] The RTT between the UE and the gNB can be calculated based on the above formula using the UE Rx - Tx time difference and the gNB Rx - Tx time difference in Tables 19 and 21 below.

[0263] (5) Double-side RTT

[0264] FIG. 16 is a diagram illustrating a double-side RTT (Round Trip Time) according to an embodiment of the present disclosure. The embodiment of FIG. 16 can be combined with various embodiments of the present disclosure.

[0265] For example, a way to perform a double-side RTT between two entities might be as follows:

[0266] For example, double-side RTT may be a positioning technique that can measure the distance between two entities even when there is a sampling clock frequency offset between the target entity and the server entity.

[0267] For example, double-side RTT is widely used in ultra-wideband (UWB) positioning and can reduce the impact of clock errors.

[0268] For example, the propagation delay T^ can be estimated by two measurements (e.g., T round1 , T round2 , T reply1 , T reply2 ).

[0269] For example, the propagation delay T(T^) can be calculated based on mathematical expression 2.

[0270]

[0271] For example, the propagation delay T(T^) can be calculated based on mathematical expression 3.

[0272]

[0273] And, T round1 × T round2 T reply1 × T reply2 We can see that it can be mathematical formula 4,

[0274]

[0275] Here, mathematical expression 4 can be the same as mathematical expression 5.

[0276]

[0277] Therefore, the propagation delay T(T^) can be estimated as in mathematical expression 6.

[0278]

[0279] In this case, for example, the error in propagation delay estimation due to clock error may be as shown in Equation 7.

[0280]

[0281] Here, e UE1 and e UE2 may be the clock offset of UE1 and UE2.

[0282] The propagation delay T(T^) may be the estimated propagation delay between UE1 and UE2.

[0283] For example, Table 16 is a table showing the definition and usage examples of RSTD (Reference signal time difference) for E-UTRA.

[0284]

[0285] For example, Table 17 is a table showing the definition and usage examples of DL PRS-RSRP (DL PRS reference signal received power).

[0286]

[0287] For example, Table 18 is a table showing the definition and usage examples of DL RSTD (DL relative signal time difference).

[0288]

[0289] For example, Table 19 is a table showing the definition and use cases of UE Rx - Tx time difference.

[0290]

[0291] For example, Table 20 is UL T UL-RTOA This table shows the definition of (UL Relative Time of Arrival).

[0292]

[0293] For example, Table 21 is a table showing the definition of gNB Rx - Tx time difference.

[0294]

[0295] For example, Table 22 is a table showing the definition of UL AoA (UL Angle of Arrival).

[0296]

[0297] For example, Table 23 is a table showing the definition of UL SRS-RSRP (UL SRS reference signal received power).

[0298]

[0299] For example, Table 24 is a table showing an example of PRS configuration.

[0300]

[0301] In the following, the following terms will be used in the context of one embodiment of the present disclosure.

[0302] - LMF - location management function

[0303] - UE-triggered SL positioning - SL (sidelink) positioning where the positioning procedure is triggered by the UE.

[0304] - gNB / LMF-triggered SL positioning - SL positioning where the positioning procedure is triggered by gNB / LMF

[0305] - UE-controlled SL positioning - SL positioning where the SL positioning group is created by the UE

[0306] - gNB-controlled SL positioning - SL positioning where the SL positioning group is created by gNB

[0307] - UE-based SL positioning - SL positioning where the UE position is calculated by the UE

[0308] - UE-assisted SL positioning - SL positioning where the UE position is calculated by gNB / LMF

[0309] - SL positioning group - UEs that participate in SL positioning

[0310] - Target UE (T-UE) - UE whose position is calculated

[0311] - Server UE (S-UE) - UE that assists T-UE's SL positioning

[0312] - MG - Measurement gap where only SL PRS transmission is allowed)

[0313] - MW - Measurement window where both SL data and SL PRS can be transmitted in a multiplexed way

[0314] - SL PRS - sidelink positioning reference signal

[0315] - CCH - Control channel

[0316] - IUC message - Inter-UE coordination message. A message that a TX UE receives from other UEs, including a RX UE, and that includes information about a set of resources suitable for transmission by the TX UE to the RX UE (preferred resources) and / or resources not suitable for transmission (non-preferred resources).

[0317] According to one embodiment of the present disclosure, an SL PRS transmission resource may be configured as an SL PRS resource set configured with at least one of the following information.

[0318] - SL PRS resource set ID

[0319] - SL PRS resource ID list - List of SL PRS resource IDs within the SL PRS resource set

[0320] - SL PRS resource type - can be set to periodic or aperiodic or semi-persistent or on-demand

[0321] - Alpha for SL PRS power control

[0322] - P0 for SL PRS power control

[0323] - Path loss reference for SL PRS power control - Can be set to SL SSB or DL ​​PRS or UL SRS or UL SRS for positioning or PSCCH DMRS or PSSCH DMRS or PSFCH or SL CSI RS, etc.

[0324] According to one embodiment of the present disclosure, the SL PRS resource set may be configured with SL PRS resources configured with at least one of the following information.

[0325] - SL PRS resource ID

[0326] - SL PRS comb size - Interval between REs where SL PRS is transmitted within a symbol

[0327] - SL PRS comb offset - RE index where the SL PRS is first transmitted within the first SL PRS symbol

[0328] - SL PRS comb cyclic shift - A cyclic shift used to generate the sequence that constitutes the SL PRS.

[0329] - SL PRS start position - The first symbol index that transmits SL PRS within a slot.

[0330] - SL PRS # of symbols - The number of symbols that make up the SL PRS in one slot

[0331] - Freq. domain shift - The lowest frequency position (index) where the SL PRS is transmitted in the frequency domain.

[0332] - SL PRS BW - Frequency Bandwidth used for SL PRS transmission

[0333] - SL PRS resource type - can be set to periodic or aperiodic or semi-persistent or on-demand

[0334] - SL PRS periodicity - The period in the time domain between SL PRS resources, physical or logical slot units of the resource pool in which the SL PRS is transmitted.

[0335] - SL PRS offset - The offset in the time domain from the start of the first SL PRS resource based on the reference timing, in units of physical or logical slots of the resource pool in which the SL PRS is transmitted. The reference timing may be SFN=0 or DFN=0, or the time of successful reception or decoding of RRC / MAC-CE / DCI / SCI associated with the SL PRS resource.

[0336] - SL PRS sequence ID

[0337] - SL PRS spatial relation - Can be set to SL SSB or DL ​​PRS or UL SRS or UL SRS for positioning or PSCCH DMRS or PSSCH DMRS or PSFCH or SL CSI RS, etc.

[0338] - SL PRS CCH - SL PRS control channel. Can signal SL PRS resource configuration information and resource location.

[0339] According to one embodiment of the present disclosure, conditions may need to be defined for an operation in which SL PRSs transmitted from different UEs in SL positioning are multiplexed within one slot based on comb / RE offset.

[0340] In the present disclosure, conditions, methods and operations for multiplexing SL PRS resources transmitted from different UEs within one slot based on a comb (size) / resource element offset (comb / RE offset) based on an SL PRS comb pattern allowed in a resource pool, and a device supporting the same can be proposed.

[0341] According to one embodiment of the present disclosure, in an SL resource pool to transmit an SL PRS, when one or more SL PRSs (resources) (transmitted by different UEs) are multiplexed based on comb (size) / resource element offset (comb / RE offset) within one slot, the UE may perform the multiplexing by at least one operation(s) described under at least one of the following conditions. For example, in the description below, M may mean the number of SL PRS symbols in SL PRS configuration information, and / or N may mean the SL PRS comb size in SL PRS configuration information.

[0342] 1. For example, if only one (M,N) value is allowed in a slot where multiplexing is allowed:

[0343] 1) For example, one (M,N) value can be (pre-)set in a resource pool.

[0344] 2) For example, it can be set by the network or LMF, etc. based on the (M,N) values ​​reported as UE capabilities.

[0345] 3) For example, the priority associated with the SL PRS to be transmitted from the resource pool can be reported by the UE to the base station or LMF.

[0346] 4) For example, the (M,N) values ​​can be set (in advance) based on the above reported priorities.

[0347] 5) For example, the (M,N) values ​​can be (pre-)set based on the SL PRS configuration information associated with the highest priority (e.g., the smallest priority value) among the priorities reported above.

[0348] 6) For example, one (M,N) value may be allowed for one slot.

[0349] 7) For example, among multiple (M,N) values ​​allowed in a resource pool, the (M,N) value that can be used for a specific slot can be determined based on sensing for SL PRS reserved resources.

[0350] 8) For example, based on the sensing result, the (M,N) value associated with the SL PRS reservation resource with the highest priority can be selected.

[0351] 9) For example, based on the sensing result, the (M,N) value associated with the SL PRS reservation resource that is reserved earliest in time can be selected.

[0352] 10) For example, based on the sensing result, the (M,N) value associated with the reserved SL PRS resource can be selected through the SCI associated with the previously transmitted SL PRS resource.

[0353] 11) For example, based on the sensing results, the (M,N) value associated with the SL PRS reservation resource reserved by the largest number of UEs can be selected.

[0354] 2. For example, if multiple (M,N) values ​​are allowed in one slot for which multiplexing is allowed:

[0355] 1) For example, based on sensing of SL PRS reserved resources, SL PRS transmission based on (M,N) values ​​that are identical to the (M,N) values ​​associated with SL PRS resources reserved by other UEs may be allowed.

[0356] 2) For example, SL PRS transmission may be allowed based on an offset having a different value than the offset associated with SL PRS resources reserved by other UEs.

[0357] 3) For example, based on sensing of SL PRS reserved resources, SL PRS transmission based on (M,N) values ​​that do not conflict with SL PRS resources reserved by other UEs may be allowed.

[0358] 4) For example, based on sensing of SL PRS reserved resources, if the ratio of the number of resources that collide with SL PRS resources reserved by other UEs is less than or equal to a threshold value compared to the total number of SL PRS transmission resources (elements) to be transmitted, SL PRS transmission based on a new (M,N) value may be allowed.

[0359] 5) For example, the above operation(s) may be limited to cases where the RSRP (Reference Signal Received Power) value associated with the SL PRS resource reserved by another UE is below a threshold value.

[0360] 6) For example, the RSRP value may be the SL PRS RSRP value.

[0361] 7) For example, the RSRP value may be a PSCCH / PSSCH DMRS (Demodulation Reference Signal) RSRP value linked to the SL PRS.

[0362] 8) For example, based on sensing of SL PRS reservation resources, if the ratio of the number of resources (elements) that collide with SL PRS resources reserved by other UEs is less than or equal to a threshold value compared to the number of SL PRS transmission resources reserved by other UEs, SL PRS transmission based on new (M,N) values ​​may be allowed.

[0363] 9) For example, the above action(s) may be limited to cases where the RSRP value associated with the SL PRS resource reserved by another UE is below a threshold value.

[0364] 10) For example, the RSRP value may be the SL PRS RSRP value.

[0365] 11) For example, the RSRP value may be a PSCCH / PSSCH DMRS RSRP value linked to the SL PRS.

[0366] According to one embodiment of the present disclosure, when SL PRS1 having a comb pattern (M1, N1) and SL PRS2 having (M2, N2) are multiplexed based on comb / RE offset (e.g., wherein M1, M2 may be the number of SL PRS symbols and N1, N2 may be the SL PRS comb size), the multiplexing may be allowed only in a manner such as at least one of the following.

[0367] 1) For example, the start symbol of the SL PRS1 and the start symbol of the SL PRS2 may be transmitted at the same time. Otherwise, a UE receiving the SL PRS1 or the SL PRS2 may experience AGC (automatic gain control) performance degradation.

[0368] 2) For example, when one or more SL PRSs transmitted by different UEs are multiplexed within one slot based on comb (size) / resource element offset (comb / RE offset), the SL PSR may need to be transmitted so that the start symbol timings of the one or more SL PRSs are the same.

[0369] 3) For example, whether comb-based multiplexing is allowed can be determined based on the SL synchronization reference.

[0370] 4) Since the requirements for SL synchronization timing error differ depending on whether the SL synchronization reference is GNSS (Global Navigation Satellite System), gNB / eNB, or UE, when multiplexing at the comb / RE offset level, inter-channel interference (ICI) may be caused by other SL PRSs transmitted through adjacent REs.

[0371] 5) For example, synchronization references allowed for each resource pool can be set (in advance).

[0372] 6) For example, comb / RE offset-based multiplexing of SL PRSs transmitted by different UEs within a single slot within a resource pool may be allowed only if GNSS is allowed as the highest priority synchronization criterion within the resource pool.

[0373] 7) For example, if the above condition(s) are not satisfied, TDM-based SL PRS multiplexing may be performed preferentially.

[0374] 8) For example, comb / RE offset-based SL PRS multiplexing may be allowed only for SL PRSs transmitted by UEs that use the SL synchronization reference included in the synchronization references allowed for SL communication in the common resource pool as the synchronization reference.

[0375] According to various embodiments of the present disclosure, an efficient method for multiplexing SL PRS resources transmitted from different UEs within one slot based on comb (size) / resource element offset (comb / RE offset) based on sensing of UEs may be proposed based on SL PRS comb patterns allowed in a resource pool.

[0376] According to one embodiment of the present disclosure, a slot transmitting an SL PRS in a common resource pool may cause problems in the operation of SL communication UEs because the SL communication UEs cannot decode the slot.

[0377] In the present disclosure, a method for performing SL positioning by transmitting and receiving SL PRS without affecting the operation of SL communication UEs in a common resource pool can be proposed.

[0378] For example, a UE performing SL positioning in a common resource pool may transmit SL PRS in at least one of the following ways:

[0379] For example, when an SL PRS is transmitted within a slot, the transmission of the SL PRS in the slot can be indicated through an SCI associated with the SL PRS so that SL communication UEs do not incorrectly decode the slot.

[0380] For example, if HARQ feedback is enabled in a resource pool, a slot may be periodically configured in the resource pool to transmit a PSFCH for HARQ feedback transmission for a PSSCH transmitted for SL communication. For example, in this case, a UE transmitting an SL PRS may transmit the SL PRS only through a slot in which the PSFCH is not transmitted.

[0381] For example, if HARQ feedback is enabled in a resource pool and a slot for transmitting a periodic PSFCH is set, a UE performing SL positioning can perform sensing except for the slot for transmitting the PSFCH within a sensing window for resource selection.

[0382] For example, (in the case described above), the UE performing the SL positioning can configure the sensing window only with slots in which the PSFCH is not transmitted.

[0383] For example, if the priority value associated with the SL PRS to be transmitted (in the case described above) is less than or equal to a threshold value, the sensing window may be configured to include a slot in which the PSFCH is transmitted.

[0384] For example, if HARQ feedback is enabled in a resource pool and a slot for transmitting a periodic PSFCH is set, a UE performing SL positioning can determine a set of candidate resources for resource selection in slots excluding the slot for transmitting the PSFCH within a selection window for resource selection.

[0385] For example, if the priority value associated with the SL PRS to be transmitted (in the case described above) is less than or equal to a threshold value, the candidate resource set may be configured including a slot in which the PSFCH is transmitted.

[0386] For example, (in the case described above), the UE performing the SL positioning can configure the selection window only with slots in which the PSFCH is not transmitted.

[0387] For example, if the priority value associated with the SL PRS to be transmitted (in the case described above) is less than or equal to a threshold value, the selection window may be configured to include a slot in which the PSFCH is transmitted.

[0388] For example, if HARQ feedback is enabled in a resource pool and a slot in which a periodic PSFCH is transmitted is configured, a UE transmitting an SL PRS may exclude (from selection) candidate resources included in the slot in which the PSFCH is transmitted from the set of candidate resources for SL PRS transmission.

[0389] For example, if the priority value associated with the SL PRS to be transmitted (in the case described above) is less than or equal to a threshold value, the UE may not exclude (from selection) the candidate resource including the slot in which the PSFCH is transmitted.

[0390] For example, if the priority value associated with the SL PRS to be transmitted (in the case described above) is less than or equal to a threshold value, and if the number of initial (initialized) or remaining candidate resources is less than or equal to the threshold value, the candidate resources excluded by being included in the slot in which the PSFCH is transmitted may be included in the candidate resources again.

[0391] For example, the (above-described) operation(s) may be limited to cases where the number of symbols of the SL PRS to be transmitted is greater than or equal to a threshold value.

[0392] For example, when the number of SL PRS symbols is 1, the SL PRS can be transmitted through resources not used for PSFCH transmission within the PSFCH symbol.

[0393] According to various embodiments of the present disclosure, an efficient method for performing SL positioning by transmitting and receiving SL PRS without affecting the operation of SL communication UEs in a common resource pool can be proposed.

[0394] In the present disclosure, a target UE may mean a device (e.g., a UE) whose distance, direction and / or location is measured with the assistance of one or more anchor devices (e.g., Anchor UEs) using a Uu link / sidelink.

[0395] In the present disclosure, an anchor UE may mean a device (e.g., a UE) that supports location confirmation of a target UE, and / or may mean a device (e.g., a UE) that performs transmission and reception of reference signals for positioning, provision of positioning-related information, etc. using a Uu link / side link.

[0396] In the present disclosure, a location server (e.g., server UE) may mean a device (e.g., UE, gNB, LMF, E-SMLC, SUPL SLP) that provides location method determination, assistance data distribution and / or location calculation functionality for positioning and ranging based services, and / or may mean a device (e.g., UE) that interacts with other devices (e.g., UE) via PC5 or the like as needed to determine ranging / location method, distribute assistance data and calculate the location of a target UE, and / or a target UE or an anchor UE may act as a location server (e.g., server UE) if any of the above functions are supported.

[0397] In the present disclosure, positioning may include at least one of two positionings depending on the position calculation subject.

[0398] 1. UE-based SL positioning - SL positioning where the UE position is calculated by the UE.

[0399] 2. UE-assisted SL positioning - SL positioning where the UE position is calculated by gNB / LMF

[0400] FIG. 17 is a diagram illustrating a problem in a method for performing wireless communication according to an embodiment of the present disclosure. The embodiment of FIG. 17 can be combined with various embodiments of the present disclosure.

[0401] Referring to FIG. 17, according to one embodiment of the present disclosure, resources of RS (e.g., (SL) PRS, CSI-RS, PT-RS, DMRS, etc.) may be provided by a base station within a resource pool, or may be selected (determined) by a UE within the resource pool. For example, the resource pool may include a dedicated resource pool that can be used for RS transmission but not for physical shared channel (e.g., PSSCH) transmission. For example, resources within the dedicated resource pool may be configured for RS transmission in units of one slot (e.g., FIG. 17). For example, the symbol occupied by the RS may be a symbol excluding an automatic gain control (AGC) symbol and a gap symbol. For example, control information transmitted via a physical control channel may include information indicating a first RS resource. For example, the control information may include information for reserving a second RS resource. For example, RSs transmitted within a dedicated resource pool may not be multiplexed with a physical shared channel to avoid collisions with SL communications.

[0402] However, for example, the resource pool may include a shared resource pool that can be used for both physical shared channels (e.g., PSSCH) and RS transmission. For example, RSs transmitted within the shared resource pool may be multiplexed with the physical shared channel. Therefore, for example, RSs transmitted within the shared resource pool may encounter collision issues with SL communications, and interference with SL communications within the shared resource pool may increase.

[0403] FIG. 18 is a diagram illustrating a procedure for performing wireless communication according to an embodiment of the present disclosure. The embodiment of FIG. 18 can be combined with various embodiments of the present disclosure.

[0404] Referring to FIG. 18, according to one embodiment of the present disclosure, a positioning group may be formed between, for example, a target UE and server / anchor UE(s).

[0405] For example, the target UE and / or anchor UE(s) can obtain information related to RS (e.g., PRS) for (SL) positioning (e.g., from a base station (location server, from (pre-)configuration of the target UE / anchor UE)). For example, the information related to RS may include at least one of information related to RS resource ID, information related to RS resource element offset, information related to RS comb size (resource element spacing), information related to RS starting symbol, or information related to number of symbols in a slot. For example, the information related to RS may include at least one of information related to whether multiplexing of RSs is allowed, or information related to allowed resource element offsets between different RSs when multiplexing of RSs is allowed, or information related to differences between resource element offsets between different RSs when multiplexing of RSs is allowed.

[0406] For example, the target UE and / or anchor UE(s) may obtain information related to a resource pool. For example, the resource pool may include a shared resource pool that can be used for both a physical shared channel (e.g., PSSCH) and RS transmission. For example, the information related to the resource pool may include information related to the configuration of a feedback channel. For example, the configuration of the feedback channel may include at least one of information regarding whether feedback is enabled, information regarding the period of feedback channel resources, information regarding the number of feedback channel resources, information regarding a physical resource block (PRB) used for the feedback channel, or information regarding a minimum time gap between physical shared channels.

[0407] For example, RS transmission / RS reception may not be performed based on the fact that a feedback channel is established within at least one RS resource within the resource pool. For example, when the target UE and / or the anchor UE trigger resource selection, they may select at least one RS resource from a set of resources within the resource pool, excluding feedback channel resources. For example, the set of resources may include a set of candidate transmission resources that are reported to a higher layer that ultimately selects resources for RS transmission. For example, the set of resources may include a set of candidate resources within a resource selection window. For example, the set of resources may include a set of resources selected (e.g., excluded remaining, remaining) within the resource selection window based on sensing.

[0408] For example, based on the resources within the resource pool, the target UE can receive the first RS (e.g., the 1-1 RS, the 1-2 RS) from the anchor UE(s).

[0409] For example, the target UE may select resources associated with the RS within the resource pool(s) on its own (e.g., resource allocation mode 2). For example, the target UE may select resources associated with the first RS within the resource pool(s) within a resource selection window based on sensing. For example, the target UE may obtain / consider information about RS priorities and / or delay budgets when selecting / deciding on resources. For example, the target UE and / or the anchor UE may select at least one RS resource from a set of resources within the resource pool, excluding feedback channel resources, when triggering resource selection.

[0410] For example, an anchor UE may monitor a second RS.

[0411] For example, based on the selected RS resource, the target UE can transmit a second RS (e.g., 2-1RS, 2-2RS) to the anchor UE(s).

[0412] For example, the target UE can obtain information about the reception time of the RS. For example, the target UE and / or the server UE can obtain information about the reception-transmission time difference of the anchor UE (e.g., t3-t0) (e.g., from the target UE, from the (pre-)configuration of the target UE / anchor UE). For example, the target UE and / or the server UE can obtain information about the reception-transmission time difference of the target UE (e.g., -(t2-t1), (t2-t1)) (e.g., from the anchor UE, from the (pre-)configuration of the target UE / anchor UE). For example, based on the (transmission time / reception time of) the RS, SL positioning (e.g., TDOA positioning, single-side RTT positioning / double-side RTT positioning) about the target UE can be performed. For example, the server UE and / or the target UE can obtain (e.g., receive / set, estimate, calculate, compute, verify, measure) information about the location of the target UE based on information about the reception time of the target UE / the reception-transmission time difference of the target UE / the reception-transmission time difference of the anchor UE.

[0413] Therefore, according to one embodiment of the present disclosure, communication can be smoothly performed within a shared resource pool available for both PSSCH transmission and PRS transmission, for example. For example, interference with SL communication can be reduced by preventing PRS transmission resources from being selected (configured) in an overlapping manner with periodically configured resources, such as PSFCH resources.

[0414] For example, whether the rule is applicable and / or the parameter values ​​related to the proposed method / rule of the present disclosure can be set / allowed service type-specifically (or differently or independently). For example, whether the rule is applicable and / or the parameter values ​​related to the proposed method / rule of the present disclosure can be set / allowed (or differently or independently) priority-specifically (or differently or independently). For example, whether the rule is applicable and / or the parameter values ​​related to the proposed method / rule of the present disclosure can be set / allowed QoS requirements (e.g., latency, reliability, minimum communication range)-specifically (or differently or independently). For example, whether the rule is applicable and / or the parameter values ​​related to the proposed method / rule of the present disclosure can be set / allowed PQI parameter-specifically (or differently or independently). For example, whether the rule is applicable and / or the parameter values ​​related to the proposed method / rule of the present disclosure can be set / allowed HARQ feedback ENABLED LCH / MAC PDU (transmission)-specifically (or differently or independently). For example, whether the rule is applied and / or the parameter values ​​related to the proposed method / rule of the present disclosure can be set / allowed specifically (or differently or independently) for HARQ feedback DISABLED LCH / MAC PDU (transmission). For example, whether the rule is applied and / or the parameter values ​​related to the proposed method / rule of the present disclosure can be set / allowed specifically (or differently or independently) for CBR measurement values ​​of resource pools. For example, whether the rule is applied and / or the parameter values ​​related to the proposed method / rule of the present disclosure can be set / allowed specifically (or differently or independently) for SL cast types (e.g., unicast, groupcast, broadcast).For example, whether the rule is applied and / or the parameter values ​​related to the proposed method / rule of the present disclosure can be set / allowed specifically (or differently or independently) for SL groupcast HARQ feedback options (e.g., NACK only feedback, ACK / NACK feedback, NACK only feedback based on TX-RX distance). For example, whether the rule is applied and / or the parameter values ​​related to the proposed method / rule of the present disclosure can be set / allowed specifically (or differently or independently) for SL mode 1 CG type (e.g., SL CG type 1 or SL CG type 2). For example, whether the rule is applied and / or the parameter values ​​related to the proposed method / rule of the present disclosure can be set / allowed specifically (or differently or independently) for SL mode type (e.g., mode 1 or mode 2). For example, whether the rule is applied and / or the parameter values ​​related to the proposed method / rule of the present disclosure can be set / allowed specifically (or differently or independently) for resource pool. For example, whether the rule applies and / or the parameter values ​​related to the proposed method / rule of the present disclosure can be set / allowed specifically (or differently or independently) whether the PSFCH resource is a configured resource pool. For example, whether the rule applies and / or the parameter values ​​related to the proposed method / rule of the present disclosure can be set / allowed specifically (or differently or independently) for a source (L2) ID. For example, whether the rule applies and / or the parameter values ​​related to the proposed method / rule of the present disclosure can be set / allowed specifically (or differently or independently) for a destination (L2) ID. For example, whether the rule applies and / or the parameter values ​​related to the proposed method / rule of the present disclosure can be set / allowed specifically (or differently or independently) for a PC5 RRC connection link.For example, whether the rule is applied and / or the parameter values ​​related to the proposed method / rule of the present disclosure can be set / allowed specifically (or differently or independently) for an SL link. For example, whether the rule is applied and / or the parameter values ​​related to the proposed method / rule of the present disclosure can be set / allowed specifically (or differently or independently) for a connection state (with a base station) (e.g., RRC CONNECTED state, IDLE state, INACTIVE state). For example, whether the rule is applied and / or the parameter values ​​related to the proposed method / rule of the present disclosure can be set / allowed specifically (or differently or independently) for an SL HARQ process (ID). For example, whether the rule is applied and / or the parameter values ​​related to the proposed method / rule of the present disclosure can be set / allowed specifically (or differently or independently) for whether the SL DRX operation (of a TX UE or an RX UE) is performed. For example, whether the rule applies and / or the parameter values ​​related to the proposed scheme / rule of the present disclosure can be set / allowed specifically (or differently or independently) depending on whether the UE is power saving (TX or RX). For example, whether the rule applies and / or the parameter values ​​related to the proposed scheme / rule of the present disclosure can be set / allowed specifically (or differently or independently) if (from a specific UE perspective) PSFCH TX and PSFCH RX overlap (and / or multiple PSFCH TXs (which exceed the UE capability)) (and / or if PSFCH TX (and / or PSFCH RX) are omitted). For example, whether the rule applies and / or the parameter values ​​related to the proposed scheme / rule of the present disclosure can be set / allowed specifically (or differently or independently) depending on whether the RX UE actually (successfully) receives a PSCCH (and / or PSSCH) (re)transmission from a TX UE.

[0415] For example, in the present disclosure, the setting (or designation) wording can be extended to include a form in which a base station notifies a terminal through a predefined (physical layer or upper layer) channel / signal (e.g., SIB, RRC, MAC CE) (and / or a form provided through pre-configuration and / or a form in which a terminal notifies another terminal through a predefined (physical layer or upper layer) channel / signal (e.g., SL MAC CE, PC5 RRC)).

[0416] For example, in the present disclosure, the PSFCH wording can be extended to (NR or LTE) PSSCH (and / or (NR or LTE) PSCCH) (and / or (NR or LTE) SL SSB (and / or UL channel / signal)). In addition, the proposed method of the present disclosure can be extended (in a new form) by being combined with each other.

[0417] For example, in the present disclosure, a specific threshold value may mean a threshold value that is defined in advance, or set (in advance) by a higher layer (including an application layer) of a network or a base station or a terminal. For example, in the present disclosure, a specific setting value may mean a value that is defined in advance, or set (in advance) by a higher layer (including an application layer) of a network or a base station or a terminal. For example, an operation set by a network / base station may mean an operation that a base station sets (in advance) to a UE via a higher layer RRC signaling, sets / signals to the UE via MAC CE, or signals to the UE via DCI.

[0418] FIG. 19 is a diagram illustrating a method for a first device to perform wireless communication according to an embodiment of the present disclosure. The embodiment of FIG. 19 may be combined with various embodiments of the present disclosure.

[0419] Referring to FIG. 19, according to one embodiment of the present disclosure, in step S1910, for example, the first device may trigger resource selection for RS transmission. In step S1920, for example, the first device may select an RS resource from a resource set based on the resource selection being triggered. In step S1930, for example, the first device may perform RS transmission based on the selected RS resource. For example, resources related to a feedback channel may be excluded from the resource set.

[0420] Additionally or alternatively, the RS may include an RS for positioning.

[0421] Additionally or alternatively, the resource set may include a candidate transmission resource set that is reported to a higher layer.

[0422] Additionally or alternatively, the resource associated with the feedback channel may be excluded from the set of candidate transmission resources.

[0423] Additionally or alternatively, the resource associated with the feedback channel may be included in the resource set based on the number of resources included in the resource set being less than a threshold.

[0424] Additionally or alternatively, the resource set may include a candidate resource set within a resource selection window determined based on slot n in which the resource selection is triggered.

[0425] Additionally or alternatively, the resource associated with the feedback channel may be excluded from the set of candidate resources.

[0426] Additionally or alternatively, among the candidate resource set excluding the resource associated with the feedback channel, at least one first resource may be selected within the resource selection window based on sensing.

[0427] Additionally or alternatively, the resource set may include a resource set within a resource pool.

[0428] Additionally or alternatively, information related to the resource pool, including information related to the feedback channel, may be obtained.

[0429] Additionally or alternatively, the information related to the feedback channel may include at least one of information regarding whether feedback is enabled or information regarding the period of the feedback channel resource.

[0430] Additionally or alternatively, the resource pool may include a shared resource pool used for transmission of both the RS and the physical shared channel.

[0431] Additionally or alternatively, information about the priority value associated with the RS may be obtained.

[0432] Additionally or alternatively, the higher the priority value, the lower the priority associated with the RS.

[0433] Additionally or alternatively, based on the priority value being greater than or equal to a threshold, the resource associated with the feedback channel may be excluded from the resource set.

[0434] Additionally or alternatively, the RS transmission may not be performed based on the feedback channel being established within at least one of the selected RS resources or RS resources provided from the base station.

[0435] Additionally or alternatively, information about the number of symbols of the RS in one slot can be obtained.

[0436] Additionally or alternatively, the resource associated with the feedback channel may be excluded from the resource set based on the number of symbols being greater than or equal to a threshold.

[0437] Additionally or alternatively, control information related to the RS, including information for identifying a resource used for the RS transmission, may be transmitted.

[0438] The proposed method can be applied to devices according to various embodiments of the present disclosure. First, the memory (104) of the first device (100) may have instructions recorded thereon that cause the first device (e.g., the processor (102), the transceiver (106)) to perform operations based on being executed by the processor (102). For example, the operations may include at least one of: triggering resource selection for transmission of a reference signal (RS); selecting an RS resource from a resource set based on the resource selection being triggered; and / or performing RS transmission based on the selected RS resource; wherein resources related to a feedback channel may be excluded from the resource set.

[0439] In one embodiment, a first device performing wireless communication is provided. The first device may include at least one transceiver; at least one processor; and at least one memory executably connected to the at least one processor and storing instructions that cause the first device to perform operations based on being executed by the at least one processor. For example, the operations may include at least one of: triggering resource selection for transmission of a reference signal (RS); selecting an RS resource from a resource set based on the resource selection being triggered; and / or performing RS transmission based on the selected RS resource; wherein a resource related to a feedback channel may be excluded from the resource set.

[0440] In one embodiment, a processing device adapted to control a first device is provided. The processing device may include at least one processor; and at least one memory executable to the at least one processor, and having instructions recorded thereon, the instructions causing the first device to perform operations based on being executed by the at least one processor. For example, the operations may include at least one of: triggering resource selection for transmission of a reference signal (RS); selecting an RS resource from a set of resources based on the resource selection being triggered; and / or performing RS transmission based on the selected RS resource; wherein a resource associated with a feedback channel may be excluded from the set of resources.

[0441] In one embodiment, a non-transitory computer-readable storage medium having instructions recorded thereon is proposed. The instructions, when executed, may cause a first device to perform operations. For example, the operations may include at least one of: triggering resource selection for transmission of a reference signal (RS); selecting an RS resource from a set of resources based on the resource selection being triggered; and / or performing RS transmission based on the selected RS resource; wherein a resource related to a feedback channel may be excluded from the set of resources.

[0442] FIG. 20 is a diagram illustrating a method for a second device to perform wireless communication according to an embodiment of the present disclosure. The embodiment of FIG. 20 may be combined with various embodiments of the present disclosure.

[0443] Referring to FIG. 20, according to one embodiment of the present disclosure, in step S2010, for example, the second device may obtain information related to a resource pool for reception of a reference signal (RS). For example, the second device may perform RS reception based on RS resources. For example, resource selection for RS transmission may be triggered. For example, based on the resource selection being triggered, an RS resource may be selected from a resource set. For example, resources related to a feedback channel may be excluded from the resource set.

[0444] Additionally or alternatively, the RS may include an RS for positioning.

[0445] Additionally or alternatively, the resource set may include a candidate transmission resource set that is reported to a higher layer.

[0446] Additionally or alternatively, the resource associated with the feedback channel may be excluded from the set of candidate transmission resources.

[0447] Additionally or alternatively, the resource associated with the feedback channel may be included in the resource set based on the number of resources included in the resource set being less than a threshold.

[0448] Additionally or alternatively, the resource set may include a candidate resource set within a resource selection window determined based on slot n in which the resource selection is triggered.

[0449] Additionally or alternatively, the resource associated with the feedback channel may be excluded from the set of candidate resources.

[0450] Additionally or alternatively, among the candidate resource set excluding the resource associated with the feedback channel, at least one first resource may be selected within the resource selection window based on sensing.

[0451] Additionally or alternatively, the resource set may include a resource set within a resource pool.

[0452] Additionally or alternatively, information related to the resource pool, including information related to the feedback channel, may be obtained.

[0453] Additionally or alternatively, the information related to the feedback channel may include at least one of information regarding whether feedback is enabled or information regarding the period of the feedback channel resource.

[0454] Additionally or alternatively, the resource pool may include a shared resource pool used for transmission of both the RS and the physical shared channel.

[0455] Additionally or alternatively, information about the priority value associated with the RS may be obtained.

[0456] Additionally or alternatively, the higher the priority value, the lower the priority associated with the RS.

[0457] Additionally or alternatively, based on the priority value being greater than or equal to a threshold, the resource associated with the feedback channel may be excluded from the resource set.

[0458] Additionally or alternatively, the RS transmission may not be performed based on the feedback channel being established within at least one of the selected RS resources or RS resources provided from the base station.

[0459] Additionally or alternatively, information about the number of symbols of the RS in one slot can be obtained.

[0460] Additionally or alternatively, the resource associated with the feedback channel may be excluded from the resource set based on the number of symbols being greater than or equal to a threshold.

[0461] Additionally or alternatively, control information related to the RS, including information for identifying a resource used for the RS transmission, may be transmitted.

[0462] The proposed method can be applied to devices according to various embodiments of the present disclosure. First, the memory (204) of the second device (200) may have instructions recorded thereon that cause the second device (e.g., the processor (202), the transceiver (206)) to perform operations based on being executed by the processor (202). For example, the operations may include at least one of: obtaining information related to a resource pool for reception of a reference signal (RS); and / or performing RS reception based on an RS resource; wherein resource selection for transmission of the RS may be triggered, and based on the resource selection being triggered, an RS resource may be selected from a resource set, and / or a resource related to a feedback channel may be excluded from the resource set.

[0463] In one embodiment, a second device performing wireless communication is provided. The first device may include at least one transceiver; at least one processor; and at least one memory executably connected to the at least one processor and storing instructions that cause the second device to perform operations based on being executed by the at least one processor. For example, the operations may include at least one of: obtaining information related to a resource pool for reception of a reference signal (RS); and / or performing RS reception based on an RS resource; wherein resource selection for transmission of the RS may be triggered, and based on the resource selection being triggered, an RS resource may be selected from a resource set, and / or a resource related to a feedback channel may be excluded from the resource set.

[0464] In one embodiment, a processing apparatus configured to control a second device is provided. The apparatus may include at least one processor; and at least one memory executable to the at least one processor, and having instructions recorded thereon, which cause the second device to perform operations based on being executed by the at least one processor. For example, the operations may include at least one of: obtaining information related to a resource pool for reception of a reference signal (RS); and / or performing RS reception based on an RS resource; wherein resource selection for transmission of the RS may be triggered, and based on the resource selection being triggered, an RS resource may be selected from a resource set, and / or a resource related to a feedback channel may be excluded from the resource set.

[0465] In one embodiment, a non-transitory computer-readable storage medium having instructions recorded thereon is proposed. The instructions, when executed by at least one processor, may cause a second device to perform operations. For example, the operations may include at least one of: obtaining information related to a resource pool for reception of a reference signal (RS); and / or performing RS reception based on an RS resource; wherein resource selection for transmission of the RS may be triggered, and based on the resource selection being triggered, an RS resource may be selected from a resource set, and / or a resource related to a feedback channel may be excluded from the resource set.

[0466] The various embodiments of the present disclosure may be combined with each other.

[0467] Below, a description is given of devices to which various embodiments of the present disclosure can be applied.

[0468] Although not limited thereto, the various descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed in this document may be applied to various fields requiring wireless communication / connectivity (e.g., 5G) between devices.

[0469] Hereinafter, more specific examples will be provided with reference to the drawings. In the drawings / descriptions below, the same drawing reference numerals may represent identical or corresponding hardware blocks, software blocks, or functional blocks, unless otherwise described.

[0470] FIG. 21 illustrates a communication system (1) according to one embodiment of the present disclosure. The embodiment of FIG. 21 can be combined with various embodiments of the present disclosure.

[0471] Referring to FIG. 21, a communication system (1) to which various embodiments of the present disclosure are applied includes a wireless device, a base station, and a network. Here, the wireless device refers to a device that performs communication using a wireless access technology (e.g., 5G NR (New RAT), LTE (Long Term Evolution)) and may be referred to as a communication / wireless / 5G device. Although not limited thereto, the wireless device may include a robot (100a), a vehicle (100b-1, 100b-2), an XR (eXtended Reality) device (100c), a hand-held device (100d), a home appliance (100e), an IoT (Internet of Things) device (100f), and an AI device / server (400). For example, the vehicle may include a vehicle equipped with a wireless communication function, an autonomous vehicle, a vehicle capable of performing vehicle-to-vehicle communication, etc. Here, the vehicle may include an Unmanned Aerial Vehicle (UAV) (e.g., a drone) and / or an Aerial Vehicle (AV) (e.g., an Advanced Air Mobility (AAM)). The XR device may include an Augmented Reality (AR) / Virtual Reality (VR) / Mixed Reality (MR) device, and may be implemented in the form of a Head-Mounted Device (HMD), a Head-Up Display (HUD) installed in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance, digital signage, a vehicle, a robot, etc. The portable device may include a smartphone, a smart pad, a wearable device (e.g., a smart watch, smart glasses), a computer (e.g., a laptop, etc.), etc. The home appliance may include a TV, a refrigerator, a washing machine, etc. The IoT device may include a sensor, a smart meter, etc. For example, a base station and a network may also be implemented as a wireless device, and a specific wireless device (200a) may act as a base station / network node to other wireless devices.

[0472] Here, the wireless communication technology implemented in the wireless devices (100a to 100f) of the present specification may include not only LTE, NR, and 6G, but also Narrowband Internet of Things for low-power communication. At this time, for example, NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology, and may be implemented with standards such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the above-described names. Additionally or alternatively, the wireless communication technology implemented in the wireless devices (100a to 100f) of the present specification may perform communication based on LTE-M technology. At this time, for example, LTE-M technology may be an example of LPWAN technology, and may be called by various names such as eMTC (enhanced Machine Type Communication). For example, LTE-M technology can be implemented by 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 above-described names. Additionally or alternatively, the wireless communication technology implemented in the wireless devices (100a to 100f) of the present specification can include at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN) considering low-power communication, and is not limited to the above-described names. For example, ZigBee technology can create personal area networks (PAN) related to small / low-power digital communication based on various standards such as IEEE 802.15.4, and can be called by various names.

[0473] Wireless devices (100a to 100f) can be connected to a network (300) via a base station (200). Artificial Intelligence (AI) technology can be applied to the wireless devices (100a to 100f), and the wireless devices (100a to 100f) can be connected to an AI server (400) via the network (300). The network (300) can be configured using a 3G network, a 4G (e.g., LTE) network, a 5G (e.g., NR) network, etc. The wireless devices (100a to 100f) can communicate with each other via the base station (200) / network (300), but can also communicate directly (e.g., sidelink communication) without going through the base station / network. For example, vehicles (100b-1, 100b-2) can communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to Everything) communication). In addition, IoT devices (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices (100a to 100f).

[0474] Wireless communication / connection (150a, 150b, 150c) can be established between wireless devices (100a~100f) / base stations (200), and base stations (200) / base stations (200). Here, wireless communication / connection can be achieved through various wireless access technologies (e.g., 5G NR) such as uplink / downlink communication (150a), sidelink communication (150b) (or, D2D communication), and communication between base stations (150c) (e.g., relay, IAB (Integrated Access Backhaul). Through wireless communication / connection (150a, 150b, 150c), wireless devices and base stations / wireless devices, and base stations and base stations can transmit / receive wireless signals to each other. For example, wireless communication / connection (150a, 150b, 150c) can transmit / receive signals through various physical channels. To this end, at least some of various configuration information setting processes for transmitting / receiving wireless signals, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.), and resource allocation processes can be performed based on various proposals of the present disclosure.

[0475] FIG. 22 illustrates a wireless device according to an embodiment of the present disclosure. The embodiment of FIG. 22 may be combined with various embodiments of the present disclosure.

[0476] Referring to FIG. 22, the first wireless device (100) and the second wireless device (200) can transmit and receive wireless signals via various wireless access technologies (e.g., 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)} of FIG. 21.

[0477] A 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) controls the memories (104) and / or the transceivers (106), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document. For example, the processor (102) may process information in the memory (104) to generate first information / signal, and then transmit a wireless signal including the first information / signal via the transceiver (106). Furthermore, the processor (102) may receive a wireless signal including second information / signal via the transceiver (106), and then store information obtained from signal processing of the second information / signal in the memory (104). The memory (104) may be connected to the processor (102) and may store various information related to the operation of the processor (102). For example, the memory (104) may perform some or all of the processes controlled by the processor (102), or may store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. Here, the processor (102) and the memory (104) may be part of a communication modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE, NR). The transceiver (106) may be connected to the processor (102) and may transmit and / or receive wireless signals via one or more antennas (108). The transceiver (106) may include a transmitter and / or a receiver. The transceiver (106) may be used interchangeably with an RF (Radio Frequency) unit. In the present disclosure, a wireless device may also mean a communication modem / circuit / chip.

[0478] A 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) controls the memories (204) and / or the transceivers (206), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document. For example, the processor (202) may process information in the memory (204) to generate third information / signals, and then transmit a wireless signal including the third information / signals via the transceivers (206). In addition, the processor (202) may receive a wireless signal including fourth information / signals via the transceivers (206), and then store information obtained from signal processing of the fourth information / signals in the memory (204). The memory (204) may be connected to the processor (202) and may store various information related to the operation of the processor (202). For example, the memory (204) may perform some or all of the processes controlled by the processor (202), or may store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. Here, the processor (202) and the memory (204) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). The transceiver (206) may be connected to the processor (202) and may transmit and / or receive wireless signals via one or more antennas (208). The transceiver (206) may include a transmitter and / or a receiver. The transceiver (206) may be used interchangeably with an RF unit. In the present disclosure, a wireless device may also mean a communication modem / circuit / chip.

[0479] Hereinafter, the hardware elements of the wireless device (100, 200) will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or more processors (102, 202). For example, one or more processors (102, 202) may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors (102, 202) may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors (102, 202) may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors (102, 202) can generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data or information according to the functions, procedures, proposals and / or methods disclosed herein, and provide the signals 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 obtain PDUs, SDUs, messages, control information, data or information according to the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed herein.

[0480] One or more processors (102, 202) may be referred to as a controller, a microcontroller, a microprocessor, or a microcomputer. One or more processors (102, 202) may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in one or more processors (102, 202). The descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc. The descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed in this document may be implemented using firmware or software configured to perform one or more processors (102, 202) or stored in one or more memories (104, 204) and driven by one or more processors (102, 202). The descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed in this document may be implemented using firmware or software in the form of codes, instructions and / or sets of instructions.

[0481] One or more memories (104, 204) may be coupled to one or more processors (102, 202) and may store various forms of data, signals, messages, information, programs, codes, instructions, and / or commands. The one or more memories (104, 204) may be configured as ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer-readable storage media, and / or combinations thereof. The one or more memories (104, 204) may be located internally and / or externally to the one or more processors (102, 202). Additionally, the one or more memories (104, 204) may be coupled to the one or more processors (102, 202) via various technologies, such as wired or wireless connections.

[0482] One or more transceivers (106, 206) can transmit user data, control information, wireless signals / channels, etc., as mentioned in the methods and / or flowcharts of this document, to one or more other devices. One or more transceivers (106, 206) can receive user data, control information, wireless signals / channels, etc., as mentioned in the descriptions, functions, procedures, proposals, methods and / or flowcharts of this document, from one or more other devices. For example, one or more transceivers (106, 206) can be connected to one or more processors (102, 202) and can transmit and receive wireless signals. For example, one or more processors (102, 202) can control one or more transceivers (106, 206) to transmit user data, control information, or wireless signals to one or more other devices. Additionally, one or more processors (102, 202) may control one or more transceivers (106, 206) to receive user data, control information, or wireless signals from one or more other devices. Additionally, one or more transceivers (106, 206) may be coupled to one or more antennas (108, 208), and one or more transceivers (106, 206) may be configured to transmit and receive user data, control information, wireless signals / channels, or the like, as referred to in the descriptions, functions, procedures, proposals, 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, wireless signals / channels, etc. from RF band signals to baseband signals in order to process the received user data, control information, wireless signals / channels, etc. using one or more processors (102, 202).One or more transceivers (106, 206) may convert user data, control information, wireless signals / channels, etc. processed by one or more processors (102, 202) from baseband signals to RF band signals. For this purpose, one or more transceivers (106, 206) may include an (analog) oscillator and / or filter.

[0483] FIG. 23 illustrates a signal processing circuit for a transmission signal according to an embodiment of the present disclosure. The embodiment of FIG. 23 may be combined with various embodiments of the present disclosure.

[0484] Referring to FIG. 23, the signal processing circuit (1000) may include a scrambler (1010), a modulator (1020), a layer mapper (1030), a precoder (1040), a resource mapper (1050), and a signal generator (1060). Although not limited thereto, the operations / functions of FIG. 23 may be performed in the processor (102, 202) and / or the transceiver (106, 206) of FIG. 22. The hardware elements of FIG. 23 may be implemented in the processor (102, 202) and / or the transceiver (106, 206) of FIG. 22. For example, blocks 1010 to 1060 may be implemented in the processor (102, 202) of FIG. 22. Additionally, blocks 1010 to 1050 may be implemented in the processor (102, 202) of FIG. 22, and block 1060 may be implemented in the transceiver (106, 206) of FIG. 22.

[0485] The codeword can be converted into a wireless signal through the signal processing circuit (1000) of FIG. 23. Here, the codeword is an encoded bit sequence of an information block. The information block may include a transport block (e.g., an UL-SCH transport block, a DL-SCH transport block). The wireless signal may be transmitted through various physical channels (e.g., a PUSCH or a PDSCH).

[0486] Specifically, the codeword can be converted into a bit sequence scrambled by a scrambler (1010). The scramble sequence used for scrambling is generated based on an initialization value, and the initialization value may include ID information of the wireless device, etc. The scrambled bit sequence can be modulated into a modulation symbol sequence by a modulator (1020). The modulation method may 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 modulation symbol sequence can be mapped to one or more transmission layers by a layer mapper (1030). The modulation symbols of each transmission layer can be mapped to the corresponding antenna port(s) by a precoder (1040) (precoding). The output z of the precoder (1040) can be obtained by multiplying the output y of the layer mapper (1030) by a precoding matrix W of N*M. Here, N is the number of antenna ports, and M is the number of transmission layers. Here, the precoder (1040) can perform precoding after performing transform precoding (e.g., DFT transform) on complex modulation symbols. In addition, the precoder (1040) can perform precoding without performing transform precoding.

[0487] The resource mapper (1050) can map modulation symbols of each antenna port to time-frequency resources. The time-frequency resources can include multiple symbols (e.g., CP-OFDMA symbols, DFT-s-OFDMA symbols) in the time domain and multiple subcarriers in the frequency domain. The signal generator (1060) generates a wireless signal from the mapped modulation symbols, and the generated wireless signal can be transmitted to another device through each antenna. To this end, the signal generator (1060) can include an Inverse Fast Fourier Transform (IFFT) module, a Cyclic Prefix (CP) inserter, a Digital-to-Analog Converter (DAC), a frequency uplink converter, etc.

[0488] The signal processing process for receiving signals in a wireless device can be configured in reverse order of the signal processing process (1010 to 1060) of FIG. 23. For example, a wireless device (e.g., 100, 200 of FIG. 22) can receive wireless signals from the outside through an antenna port / transceiver. The received wireless signals can be converted into baseband signals through a signal restorer. For this purpose, the signal restorer can include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a fast Fourier transform (FFT) module. Thereafter, the baseband signal can be restored to a codeword through a resource demapper process, a postcoding process, a demodulation process, and a descrambling process. The codewords can be restored to the original information blocks through decoding. Accordingly, a signal processing circuit (not shown) for a received signal may include a signal restorer, a resource de-mapper, a postcoder, a demodulator, a de-scrambler, and a decoder.

[0489] Figure 24 illustrates a wireless device according to an embodiment of the present disclosure. The wireless device may be implemented in various forms depending on the use case / service (see Figure 21). The embodiment of Figure 24 may be combined with various embodiments of the present disclosure.

[0490] Referring to FIG. 24, the wireless device (100, 200) corresponds to the wireless device (100, 200) of FIG. 22 and may be composed of various elements, components, units / units, and / or modules. For example, the wireless device (100, 200) may include a communication unit (110), a control unit (120), a memory unit (130), and additional elements (140). The communication unit may include a communication circuit (112) and a transceiver(s) (114). For example, the communication circuit (112) may include one or more processors (102, 202) and / or one or more memories (104, 204) of FIG. 22. For example, the transceiver(s) (114) may include one or more transceivers (106, 206) and / or one or more antennas (108, 208) of FIG. 22. The control unit (120) is electrically connected to the communication unit (110), the memory unit (130), and the additional elements (140) and controls the overall operation of the wireless device. For example, the control unit (120) may control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit (130). In addition, the control unit (120) may transmit 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 in the memory unit (130).

[0491] The additional element (140) may be configured in various ways depending on the type of the wireless device. For example, the additional element (140) may include at least one of a power unit / battery, an input / output unit (I / O unit), a driving unit, and a computing unit. Although not limited thereto, the wireless device may be implemented in the form of a robot (Fig. 21, 100a), a vehicle (Fig. 21, 100b-1, 100b-2), an XR device (Fig. 21, 100c), a portable device (Fig. 21, 100d), a home appliance (Fig. 21, 100e), an IoT device (Fig. 21, 100f), a digital broadcasting terminal, a hologram device, a public safety device, an MTC device, a medical device, a fintech device (or a financial device), a security device, a climate / environmental device, an AI server / device (Fig. 21, 400), a base station (Fig. 21, 200), a network node, etc. Wireless devices may be mobile or stationary depending on the use / service.

[0492] In FIG. 24, various elements, components, units / parts, and / or modules within the wireless device (100, 200) may be interconnected entirely via a wired interface, or at least some may be wirelessly connected via a communication unit (110). For example, within the wireless device (100, 200), the control unit (120) and the communication unit (110) may be wired, and the control unit (120) and the first unit (e.g., 130, 140) may be wirelessly connected via the communication unit (110). In addition, each element, component, unit / part, and / or module within the wireless device (100, 200) may further include one or more elements. For example, the control unit (120) may be composed of one or more processor sets. For example, the control unit (120) may be composed of a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing processor, a memory control processor, etc. As another example, the memory unit (130) may be composed of a random access memory (RAM), a dynamic RAM (DRAM), a read only memory (ROM), a flash memory, a volatile memory, a non-volatile memory, and / or a combination thereof.

[0493] Below, the implementation example of Fig. 24 is described in more detail with reference to the drawings.

[0494] FIG. 25 illustrates a mobile device according to an embodiment of the present disclosure. The mobile device may include a smartphone, a smart pad, a wearable device (e.g., a smartwatch, smartglasses), or a portable computer (e.g., a laptop, etc.). The mobile device may be referred to as a Mobile Station (MS), a User Terminal (UT), a Mobile Subscriber Station (MSS), a Subscriber Station (SS), an Advanced Mobile Station (AMS), or a Wireless Terminal (WT). The embodiment of FIG. 25 may be combined with various embodiments of the present disclosure.

[0495] Referring to FIG. 25, 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 configured as a part of the communication unit (110). Blocks 110 to 130 / 140a to 140c correspond to blocks 110 to 130 / 140 of FIG. 24, respectively.

[0496] The communication unit (110) can transmit and receive signals (e.g., data, control signals, etc.) with other wireless devices and base stations. The control unit (120) can control components of the mobile device (100) to perform various operations. The control unit (120) can include an AP (Application Processor). The memory unit (130) can store data / parameters / programs / codes / commands required for operating the mobile device (100). In addition, the memory unit (130) can store input / output data / information, etc. The power supply unit (140a) supplies power to the mobile device (100) and can include a wired / wireless charging circuit, a battery, etc. The interface unit (140b) can support connection between the mobile device (100) and other external devices. The interface unit (140b) can include various ports (e.g., audio input / output ports, video input / output ports) for connection with external devices. The input / output unit (140c) can input or output video information / signals, audio information / signals, data, and / or information input from a user. The input / output unit (140c) may include a camera, a microphone, a user input unit, a display unit (140d), a speaker, and / or a haptic module.

[0497] For example, in the case of data communication, the input / output unit (140c) obtains information / signals (e.g., touch, text, voice, image, video) input by the user, and the obtained information / signals can be stored in the memory unit (130). The communication unit (110) converts the information / signals stored in the memory into wireless signals, and can directly transmit the converted wireless signals to other wireless devices or to a base station. In addition, the communication unit (110) can receive wireless signals from other wireless devices or base stations, and then restore the received wireless signals to the original information / signals. The restored information / signals can be stored in the memory unit (130) and then output in various forms (e.g., text, voice, image, video, haptic) through the input / output unit (140c).

[0498] FIG. 26 illustrates a vehicle or autonomous vehicle according to one embodiment of the present disclosure. The vehicle or autonomous vehicle may be implemented as a mobile robot, a car, a train, a manned or unmanned aerial vehicle (AV), a ship, or the like. The embodiment of FIG. 26 may be combined with various embodiments of the present disclosure.

[0499] Referring to FIG. 26, a vehicle or autonomous vehicle (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a driving unit (140a), a power supply unit (140b), a sensor unit (140c), and an autonomous driving unit (140d). The antenna unit (108) may be configured as a part of the communication unit (110). Blocks 110 / 130 / 140a to 140d correspond to blocks 110 / 130 / 140 of FIG. 24, respectively.

[0500] The communication unit (110) can transmit and receive signals (e.g., data, control signals, etc.) with external devices such as other vehicles, base stations (e.g., base stations, road side units, etc.), and servers. The control unit (120) can control elements of the vehicle or autonomous vehicle (100) to perform various operations. The control unit (120) can include an ECU (Electronic Control Unit). The drive unit (140a) can drive the vehicle or autonomous vehicle (100) on the ground. The drive unit (140a) can include an engine, a motor, a power train, wheels, brakes, a steering device, etc. The power supply unit (140b) supplies power to the vehicle or autonomous vehicle (100) and can include a wired / wireless charging circuit, a 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, a collision sensor, a wheel sensor, a speed sensor, an incline sensor, a weight detection sensor, a heading sensor, a position module, a vehicle forward / backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illuminance sensor, a pedal position sensor, etc. The autonomous driving unit (140d) may implement a technology for maintaining a driving lane, a technology for automatically controlling speed such as adaptive cruise control, a technology for automatically driving along a set path, a technology for automatically setting a path and driving when a destination is set, etc.

[0501] 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 control). During autonomous driving, the communication unit (110) can irregularly / periodically acquire the latest traffic information data from an external server and can acquire surrounding traffic information data from surrounding vehicles. In addition, 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 newly acquired data / information. The communication unit (110) can transmit information regarding the vehicle location, autonomous driving route, driving plan, etc. to the external server. External servers can predict traffic information data in advance using AI technology or other technologies based on information collected from vehicles or autonomous vehicles, and provide the predicted traffic information data to the vehicles or autonomous vehicles.

[0502] The claims set forth in this specification may be combined in various ways. For example, the technical features of the method claims of this specification may be combined and implemented as a device, and the technical features of the device claims of this specification may be combined and implemented as a method. Furthermore, the technical features of the method claims and the technical features of the device claims of this specification may be combined and implemented as a device, and the technical features of the method claims and the technical features of the device claims of this specification may be combined and implemented as a method.

Claims

1. In a method for performing wireless communication by a first device, A step for triggering resource selection for transmission of RS (reference signal); A step of selecting an RS resource from among a set of resources based on the above resource selection being triggered; and A step of performing RS transmission based on the above-mentioned selected RS resource; including; A method wherein resources associated with a feedback channel are excluded from the set of resources.

2. In paragraph 1, A method wherein the RS includes an RS for positioning.

3. In paragraph 1, The above resource set includes a set of candidate transmission resources that are reported to a higher layer, and A method wherein the resource associated with the feedback channel is excluded from the set of candidate transmission resources.

4. In paragraph 1, A method wherein the resource associated with the feedback channel is included in the resource set based on the number of resources included in the resource set being less than a threshold value.

5. In paragraph 1, The above resource set includes a candidate resource set within a resource selection window determined based on slot n where the resource selection is triggered, and A method wherein the resource associated with the feedback channel is excluded from the set of candidate resources.

6. In paragraph 5, A method further comprising: selecting at least one first resource within the resource selection window based on sensing from among the candidate resource set from which the resource associated with the feedback channel is excluded.

7. In paragraph 1, The above resource set includes a resource set within a resource pool, and Further comprising a step of obtaining information related to the resource pool, including information related to the feedback channel; A method wherein the information related to the feedback channel includes at least one of information regarding whether feedback is enabled or information regarding the period of the feedback channel resource.

8. In paragraph 7, A method wherein the resource pool comprises a shared resource pool used for transmission of both the RS and the physical shared channel.

9. In paragraph 1, Further comprising a step of obtaining information about a priority value related to the RS; The higher the priority value above, the lower the priority associated with RS, and A method in which the resource associated with the feedback channel is excluded from the resource set based on the priority value being greater than or equal to a threshold value.

10. In paragraph 1, A method in which the RS transmission is not performed based on the feedback channel being established within at least one RS resource among the selected RS resources or RS resources provided from the base station.

11. In paragraph 1, A step of obtaining information about the number of symbols of the RS in one slot; further comprising; A method in which the resource associated with the feedback channel is excluded from the resource set based on the number of the symbols being greater than or equal to a threshold value.

12. In paragraph 1, A method further comprising: a step of transmitting control information related to the RS, the control information including information for identifying a resource used for transmitting the RS.

13. In a first device performing wireless communication, At least one transmitter / receiver; at least one processor; and At least one memory executable connected to said at least one processor and having instructions recorded thereon that cause said first device to perform operations based on being executed by said at least one processor, said operations comprising: A step for triggering resource selection for transmission of RS (reference signal); A step of selecting an RS resource from among a set of resources based on the above resource selection being triggered; and A step of performing RS transmission based on the above-mentioned selected RS resource; including; A first device, wherein resources associated with a feedback channel are excluded from the set of resources.

14. In a processing device adapted to control a first device, The above processing device, at least one processor; and At least one memory executable to said at least one processor, and having instructions recorded thereon that cause said first device to perform operations based on being executed by said at least one processor, said operations comprising: A step for triggering resource selection for transmission of RS (reference signal); A step of selecting an RS resource from among a set of resources based on the above resource selection being triggered; and A step of performing RS transmission based on the above-mentioned selected RS resource; including; A processing device, wherein resources associated with a feedback channel are excluded from the set of resources.

15. A non-transitory computer-readable storage medium that records commands, The above instructions, when executed, cause the first device to perform actions, wherein the actions are: A step for triggering resource selection for transmission of RS (reference signal); A step of selecting an RS resource from among a set of resources based on the above resource selection being triggered; and A step of performing RS transmission based on the above-mentioned selected RS resource; including; A non-transitory computer-readable storage medium, wherein resources related to a feedback channel are excluded from the set of resources.

16. In a method for performing wireless communication by a second device, A step of acquiring information related to a resource pool for receiving a RS (reference signal); and A step of performing RS reception based on RS resources; including: Resource selection for RS transmission is triggered, Based on the above resource selection being triggered, an RS resource is selected from the resource set, and A method wherein resources associated with a feedback channel are excluded from the set of resources.

17. In a second device performing wireless communication, At least one transmitter / receiver; at least one processor; and At least one memory executable connected to said at least one processor and having instructions recorded thereon that cause said second device to perform operations based on being executed by said at least one processor, said operations comprising: A step of acquiring information related to a resource pool for receiving a RS (reference signal); and A step of performing RS reception based on RS resources; including: Resource selection for RS transmission is triggered, Based on the above resource selection being triggered, an RS resource is selected from the resource set, and A second device, wherein resources associated with a feedback channel are excluded from the set of resources.

18. In a processing apparatus adapted to control a second device, the processing apparatus comprises: at least one processor; and At least one memory executable to said at least one processor, and having instructions recorded thereon that cause said second device to perform operations based on being executed by said at least one processor, said operations comprising: A step of acquiring information related to a resource pool for receiving a RS (reference signal); and A step of performing RS reception based on RS resources; including: Resource selection for RS transmission is triggered, Based on the above resource selection being triggered, an RS resource is selected from the resource set, and A processing device, wherein resources associated with a feedback channel are excluded from the set of resources.

19. A non-transitory computer-readable storage medium that records commands, The above instructions, when executed, cause the second device to perform actions, wherein the actions are: A step of acquiring information related to a resource pool for receiving a RS (reference signal); and A step of performing RS reception based on RS resources; including: Resource selection for RS transmission is triggered, Based on the above resource selection being triggered, an RS resource is selected from the resource set, and A non-transitory computer-readable storage medium, wherein resources related to a feedback channel are excluded from the set of resources.

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