Method and apparatus for wireless positioning communication

Abstract

A method for a first device to perform wireless communication and a device supporting the method are proposed. For example, the first device can acquire information related to PT-RS transmission. For example, the first device can acquire information related to an SL PRS, including at least one of information related to an SL PRS resource ID, information related to an SL PRS comb offset, information related to an SL PRS comb size, information related to an SL PRS start symbol, or information related to the number of SL PRS symbols. For example, the first device can perform an SL PRS transmission based on the information related to the SL PRS. For example, the PT-RS transmission can be canceled within a symbol in which the SL PRS is transmitted.

Description

[Technical Field]

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

[0002] 5G NR is a successor technology to LTE (long term evolution) and is a new clean-slate mobile communication 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 to intermediate-frequency bands between 1 GHz and 10 GHz, and high-frequency (millimeter wave) bands above 24 GHz.

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

[0004] [Table 1] Summary of the Invention [Means for solving the problem]

[0005] In one embodiment, a method for a first device to perform wireless communication is provided. For example, the first device may acquire information related to a PT-RS transmission. For example, the first device may acquire information related to an SL PRS, including at least one of information related to an SL PRS resource ID, information related to an SL PRS comb offset, information related to an SL PRS comb size, information related to an SL PRS starting symbol, or information related to a number of SL PRS symbols. For example, the first device may perform an SL PRS transmission based on the information related to the SL PRS. For example, the PT-RS transmission may be canceled within a symbol in which the SL PRS is transmitted. [Brief explanation of the drawings]

[0006] [Figure 1] 1 illustrates a communication structure that can be provided in a 6G system according to one embodiment of the present disclosure. [Figure 2] 1 illustrates the electromagnetic spectrum, according to one embodiment of the present disclosure. [Figure 3] 1 illustrates an example of a typical scenario of a transparent payload-based NTN according to an embodiment of the present disclosure. [Figure 4] 1 illustrates an example of a typical scenario of NTN based on regenerative payload, according to an embodiment of the present disclosure. [Figure 5] 1 illustrates an example of a sensing operation according to an embodiment of the present disclosure. [Figure 6] 1 illustrates a slot structure for a frame according to one embodiment of the present disclosure. [Figure 7] 1 illustrates an example of a BWP according to an embodiment of the present disclosure. [Figure 8]1 illustrates a procedure in which a terminal performs V2X or SL communication depending on a resource allocation mode according to an embodiment of the present disclosure. [Figure 9] 1 illustrates three cast types according to one embodiment of the present disclosure. [Figure 10] 1 illustrates a V2X synchronization source or synchronization reference according to one embodiment of the present disclosure. [Figure 11] According to one embodiment of the present disclosure, an example of an architecture in a 5G system capable of positioning a UE connected to an NG-RAN (Next Generation-Radio Access Network) or E-UTRAN is shown. [Figure 12] 1 illustrates an example network implementation for determining the location of a UE according to one embodiment of the present disclosure. [Figure 13] 1 illustrates an example of protocol layers used to support LTE Positioning Protocol (LPP) message transmission between an LMF and a UE according to one embodiment of the present disclosure. [Figure 14] 1 illustrates an example of protocol layers 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. [Figure 15] FIG. 1 is a diagram for explaining an observed time difference of arrival (OTDOA) positioning method according to an embodiment of the present disclosure. [Figure 16] 1 illustrates a double-sided RTT according to one embodiment of the present disclosure. [Figure 17] 1 is a diagram illustrating a problem associated with wireless communication related to positioning according to an embodiment of the present disclosure. [Figure 18] 1 is a diagram illustrating a procedure for performing wireless communication related to positioning according to an embodiment of the present disclosure. [Figure 19]1 illustrates a method for a first device to perform wireless communication according to one embodiment of the present disclosure. [Figure 20] 1 illustrates a method for a second device to perform wireless communication according to one embodiment of the present disclosure. [Figure 21] 1 illustrates a communication system 1 according to one embodiment of the present disclosure. [Figure 22] 1 illustrates a wireless device according to one embodiment of the present disclosure. [Figure 23] 1 illustrates a signal processing circuit for a transmit signal according to one embodiment of the present disclosure. [Figure 24] 1 illustrates a wireless device according to one embodiment of the present disclosure. [Figure 25] 1 illustrates a mobile device according to one embodiment of the present disclosure. [Figure 26] 1 illustrates a vehicle or autonomous vehicle according to one embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0007] As used herein, "A or B" can mean "only A," "only B," or "both A and B." Also, 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."

[0008] As used herein, a slash ( / ) or a comma can mean "and / or." For example, "A / B" can mean "A and / or B." Thus, "A / B" can mean "only A," "only B," or "both A and B." For example, "A, B, C" can mean "A, B, or C."

[0009] As used herein, "at least one of A and B" can mean "only A," "only B," or "both A and B." Additionally, as used herein, the expressions "at least one of A or B" and "at least one of A and / or B" can be interpreted as "at least one of A and B."

[0010] Furthermore, 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." Furthermore, "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."

[0011] Furthermore, parentheses used herein may mean "for example." Specifically, when "control information (PDCCH)" is used, "PDCCH" is proposed as an example of "control information." Furthermore, "control information" in this specification is not limited to "PDCCH," and "PDCCH" is proposed as an example of "control information." Furthermore, when "control information (i.e., PDCCH)" is used, "PDCCH" is proposed as an example of "control information."

[0012] In the following description, "when, if, in case of" may be replaced with "based on."

[0013] In this specification, technical features individually described in one drawing may be embodied individually or simultaneously.

[0014] In this specification, a higher layer parameter may be a parameter that is configured for a terminal, configured in advance, or predefined. For example, a base station or a network may transmit the higher layer parameter to the terminal. For example, the higher layer parameter may be transmitted via radio resource control (RRC) signaling or medium access control (MAC) signaling.

[0015] In this specification, "configured or defined" can be interpreted as being configured or pre-configured in the device via pre-defined signaling (e.g., SIB, MAC, RRC) from a base station or a network. In this specification, "configured or defined" can be interpreted as being pre-configured in the device.

[0016] The techniques proposed herein can be used in various wireless communication systems, such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), and single carrier frequency division multiple access (SC-FDMA). CDMA can be implemented in wireless technologies such as universal terrestrial radio access (UTRA) and CDMA2000. TDMA can be implemented in wireless technologies such as global system for mobile communications (GSM), general packet radio service (GPRS), and enhanced data rates for GSM evolution (EDGE). OFDMA can be implemented in wireless technologies such as IEEE (Institute of Electrical and Electronics Engineers) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, evolved UTRA (E-UTRA), long term evolution (LTE), and 5G NR.

[0017] The technology proposed in this specification is implemented in 6G wireless technology and can be applied to various 6G systems. For example, the 6G system can have key factors such as eMBB (enhanced mobile broadband), URLLC (ultra-reliable low latency communications), mMTC (massive machine-type communication), AI (artificial intelligence) integrated communication, tactile internet, high throughput, high network capacity, high energy efficiency, low backhaul and access network congestion, and enhanced data security.

[0018] 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.

[0019] New network characteristics in 6G include:

[0020] -satellites integrated network

[0021] -Connected intelligence: Unlike previous generations of wireless communication systems, 6G is revolutionary, evolving wirelessly from "connected things" to "connected intelligence." AI can be applied to each step of the communication process (or each step of signal processing, as described below).

[0022] - Seamless integration of wireless information and energy transfer

[0023] -Ubiquitous super 3D connectivity: Connecting drones and very low Earth orbit satellite networks to core network functions will create ubiquitous super 3D connectivity in 6G.

[0024] Some common requirements for the characteristics of the new 6G network mentioned above are:

[0025] -Small cell networks

[0026] -Ultra-dense heterogeneous network

[0027] -High-capacity backhaul

[0028] - Radar technology integrated with mobile technology: High-precision localization (or location-based services) via communication is one of the functions of 6G wireless communication systems. Therefore, radar systems may be integrated with 6G networks.

[0029] -Software and virtualization

[0030] The core implementation technologies of the 6G system are explained below.

[0031] - Artificial intelligence: Introducing AI into communications simplifies and improves real-time data transmission. AI can use numerous analyses to determine how complex target operations should be executed. This means AI can increase efficiency and reduce processing delays. Time-consuming tasks such as handover, network selection, and resource scheduling can be performed instantly using AI. AI can also play an important role in M2M, machine-to-human, and human-to-machine communications. AI also enables rapid communication in BCI (Brain Computer Interface). AI-based communication systems are supported by metamaterials, intelligent structures, intelligent networks, intelligent devices, intelligent radios, self-sustaining wireless networks, and machine learning.

[0032] -THz communication: Data transmission rates can be increased by increasing bandwidth. This can be achieved by using sub-THz communication over a wide bandwidth and applying advanced massive MIMO technology. THz waves, also known as submillimeter radiation, typically refer to the frequency band between 0.1 THz and 10 THz, with wavelengths ranging from 0.03 mm to 3 mm. The 100 GHz-300 GHz band range (sub-THz band) is considered the main portion of the THz band for cellular communications. Adding the sub-THz band to the mmWave band will increase 6G cellular communication capacity. Of the defined THz bands, 300 GHz-3 THz is in the far-infrared (IR) frequency band. While the 300 GHz-3 THz band is part of a broadband, it is at the boundary of the broadband and immediately behind the RF band. Therefore, the 300 GHz-3 THz band is similar to RF. Figure 2 illustrates an electromagnetic spectrum according to one embodiment of the present disclosure. The embodiment of Figure 2 can be combined with various embodiments of the present disclosure. Key characteristics of THz communications include (i) a wide usable bandwidth to support very high data rates, and (ii) high path loss at high frequencies (highly directional antennas are essential). The narrow beamwidth produced by highly directional antennas reduces interference. The small wavelength of THz signals allows a greater number of antenna elements to be integrated into devices and base stations operating in this band. This allows for the use of advanced adaptive array techniques that can overcome range limitations.

[0033] -Large-scale MIMO technology

[0034] -Hologram beamforming (HBF)

[0035] -Optical wireless technology

[0036] -Free Space Optical Transmission Backhaul Network (FSO backhaul network)

[0037] -Quantum communication

[0038] -cell-free communication

[0039] -Integration of wireless information and power transmission

[0040] -Integration of wireless communication and sensing

[0041] -Integrated access and backhaul network

[0042] -Big data analysis

[0043] -Reconfigurable intelligent surface

[0044] -Metaverse

[0045] -Blockchain

[0046] - Unmanned aerial vehicles (UAVs): UAVs, or drones, will be an important element in 6G wireless communications. In most cases, high-speed data wireless connections are provided using UAV technology. Base station (BS) entities can be installed on UAVs to provide cellular connectivity. UAVs have specific features not found in fixed BS infrastructure, such as easy deployment, strong line-of-sight links, and freedom of controlled mobility. During emergency situations such as natural disasters, deploying terrestrial communication infrastructure is economically unfeasible and sometimes unable to provide services in volatile environments. UAVs can easily handle such situations. UAVs can become a new paradigm in the wireless communications field. This technology facilitates the three fundamental requirements of wireless networks: eMBB, URLLC, and mMTC. UAVs can also support various purposes such as improved 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.

[0047] -Advanced air mobility (AAM): AAM is a broader concept than UAM (urban air mobility), which is an air transportation method available in urban areas, and refers to a means of transportation that includes travel within urban areas and between regional hubs.

[0048] -Autonomous driving: V2X (vehicle to everything), a key element in building autonomous driving infrastructure, is a technology that allows vehicles to communicate and share information with various elements on the road, such as vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I), to drive autonomously. High-speed transmission and low-latency technology are essential to maximize autonomous driving performance and ensure high safety. Furthermore, in the future, autonomous driving may go beyond simply providing warnings and guidance messages to the driver and require active intervention in vehicle operation and direct control of the vehicle in dangerous situations. This can result in a massive amount of information that needs to be transmitted and received. Therefore, 6G is expected to maximize autonomous driving with faster transmission speeds and lower latency than 5G.

[0049] Non-terrestrial networks (NTN): NTN may refer to a network or network segment that uses radio frequency (RF) resources onboard a satellite (or an unmanned aerial system (UAS) platform). FIG. 3 illustrates an example of a typical scenario for an NTN based on a transparent payload according to an embodiment of the present disclosure. FIG. 4 illustrates an example of a typical scenario for an NTN based on a regenerative payload according to an embodiment of the present disclosure. The embodiments of FIG. 3 or 4 may be combined with various embodiments of the present disclosure. Referring to FIG. 3, a satellite (or a UAS platform) may establish a service link with a UE. A satellite (or a UAS platform) may connect to a gateway via a feeder link. A satellite may connect to a data network via a gateway. A beam footprint may refer to an area that can receive a signal transmitted by a satellite. Referring to FIG. 4, a satellite (or a UAS platform) may establish a service link with a UE. A satellite (or UAS platform) connected to a UE can connect to other satellites (or UAS platforms) via inter-satellite links (ISLs). Other satellites (or UAS platforms) can connect to a gateway via feeder links. A satellite can connect to a data network via other satellites and gateways based on a regenerative payload. If there is no ISL between a satellite and another satellite, a feeder link between the satellite and a 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) can implement a transparent or regenerative (with on-board processing) payload. For example, a satellite (or UAS platform) can generate various beams over a specified service area depending on the satellite's (or UAS platform's) field of view. For example, the satellite's (or UAS platform's) field of view may vary depending on the on-board 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 modified. 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 is substantially equivalent to a satellite (or UAS platform) equipped with all or part of a base station's functionality.

[0050] Integrated Sensing and Communication (ISAC): Wireless sensing is a technology that uses radio frequencies to obtain information about the environment and / or the characteristics of objects within it by detecting an object's instantaneous linear velocity, angle, distance (range), etc. Radio frequency sensing does not require connecting to an object via a device in the network, allowing for device-free object location services. Obtaining range, velocity, and angle information from radio frequency signals can provide a wide range of new functions, such as various object detection and recognition (e.g., vehicles, humans, animals, UAVs) and high-precision positioning, tracking, and activity recognition. Wireless sensing services can provide information to various industries (e.g., unmanned aerial vehicles, smart homes, V2X, factories, railways, public safety, etc.), enabling applications such as intruder detection, assisted vehicle steering and navigation, trajectory tracking, collision avoidance, traffic management, and health and traffic management. In some cases, wireless sensing can use non-3GPP-type sensors (e.g., radar, camera) to further support 3GPP-based sensing. For example, the operation of a wireless sensing service, i.e., the sensing operation, can rely on the transmission, reflection, and scattering processing of wireless sensing signals. Therefore, wireless sensing can provide an opportunity to augment existing communication systems with wireless communication and sensing networks in a communication network. FIG. 5 illustrates an example of a sensing operation according to an embodiment of the present disclosure. The embodiment of FIG. 5 can be combined with various embodiments of the present disclosure. Specifically, FIG. 5(a) illustrates an example of sensing using a co-located sensing receiver and sensing transmitter (e.g., monostatic sensing), and FIG. 5(b) illustrates an example of sensing using a separated sensing receiver and sensing transmitter (e.g., bistatic sensing).

[0051] The radio interface protocol layers between a terminal and a network can be divided into L1 (Layer 1), L2 (Layer 2), and L3 (Layer 3) based on the three lower layers of the Open System Interconnection (OSI) reference model, which is widely known in communication systems. The physical layer, which belongs to Layer 1, provides information transfer services using physical channels, while the Radio Resource Control (RRC) 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.

[0052] The physical layer provides information transfer services to higher layers using physical channels. The physical layer is connected to the higher layer, the Medium Access Control (MAC) layer, via transport channels. Data moves between the MAC layer and the physical layer via transport channels. Transport channels are classified according to how and what characteristics data is transmitted over the radio interface.

[0053] Data is transferred between different physical layers, i.e., between the physical layers of a transmitter and a receiver, via a physical channel, which can be modulated using Orthogonal Frequency Division Multiplexing (OFDM) and utilizes time and frequency as radio resources.

[0054] The MAC layer provides services to the higher-level radio link control (RLC) layer via logical channels. The MAC layer provides a mapping function from multiple logical channels to multiple transport channels. The MAC layer also provides a logical channel multiplexing function by mapping multiple logical channels to a single transport channel. The MAC sublayer provides data transfer services on the logical channels.

[0055] The RLC layer performs concatenation, segmentation, and reassembly of RLC Service Data Units (SDUs). To guarantee various Quality of Service (QoS) requirements for Radio Bearers (RBs), the RLC layer provides three operation modes: Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM). AM RLC provides error correction via automatic repeat request (ARQ).

[0056] The Radio Resource Control (RRC) layer is defined only in the control plane. The RRC layer is responsible for controlling logical channels, transmission channels, and physical channels in relation to the configuration, reconfiguration, and release of radio bearers. RB refers to the logical path provided by layer 1 (physical layer or PHY layer) and layer 2 (MAC layer, RLC layer, PDCP (Packet Data Convergence Protocol) layer, SDAP (Service Data Adaptation Protocol) layer) for data transmission between the terminal and the network.

[0057] The functions of the PDCP layer in the user plane include user data transmission, header compression, and ciphering, and the functions of the PDCP layer in the control plane include control plane data transmission and encryption / integrity protection.

[0058] The Service Data Adaptation Protocol (SDAP) layer is defined only in the user plane. The SDAP layer performs mapping between QoS flows and data radio bearers, QoS flow identifier (ID) marking in downlink and uplink packets, etc.

[0059] RB configuration refers to the process of defining the characteristics of the radio protocol layer and channel to provide a specific service and setting their specific parameters and operation methods. RBs are divided into two types: SRB (Signaling Radio Bearer) and DRB (Data Radio Bearer). SRB is used as a path to transmit RRC messages in the control plane, and DRB is used as a path to transmit user data in the user plane.

[0060] 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 an RRC_CONNECTED state; otherwise, it is in an RRC_IDLE state. In the case of NR, an RRC_INACTIVE state is additionally defined, and a terminal in the RRC_INACTIVE state maintains a connection with the core network and can release the connection with the base station.

[0061] Downlink transport channels for transmitting data from a network to a terminal include a Broadcast Channel (BCH) for transmitting system information and a Downlink Shared Channel (SCH) for transmitting user traffic and control messages. Traffic or control messages of a downlink multicast or broadcast service can be transmitted via the Downlink SCH or via a separate Multicast Channel (MCH). Meanwhile, uplink transport channels for transmitting data from a terminal to a network include a Random Access Channel (RACH) for transmitting initial control messages and an Uplink Shared Channel (SCH) for transmitting user traffic and control messages.

[0062] Above the transport channels, logical channels that are mapped to the transport channels include BCCH (Broadcast Control Channel), PCCH (Paging Control Channel), CCCH (Common Control Channel), MCCH (Multicast Control Channel), and MTCH (Multicast Traffic Channel).

[0063] 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 include five 1 ms subframes (SF). A subframe can be divided into one or more slots, and the number of slots in a subframe can be determined by the subcarrier spacing (SCS). Each slot can include 12 or 14 OFDM(A) symbols depending on the cyclic prefix (CP).

[0064] When a normal CP is used, each slot can contain 14 symbols. When an extended CP is used, each slot can contain 12 symbols. Here, the symbols can include OFDM symbols (or CP-OFDM symbols) or Single Carrier-FDMA (SC-FDMA) symbols (or Discrete Fourier Transform-spread-OFDM (DFT-s-OFDM) symbols).

[0065] Table 2 below shows the number of symbols per slot (N) depending on the SCS setting (u) when a normal CP or an extended CP is used. slot symb ), number of slots per frame (N frame,u slot ) and the number of slots per subframe (N subframe,u slot ) is shown below.

[0066] [Table 2]

[0067] 6 illustrates a slot structure of a frame according to one embodiment of the present disclosure. The embodiment of FIG. 6 can be combined with various embodiments of the present disclosure.

[0068] Referring to FIG. 6, a slot includes multiple symbols in the time domain. A carrier includes multiple subcarriers in the frequency domain. A Resource Block (RB) can be defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. A Bandwidth Part (BWP) can be defined as multiple consecutive (P)RBs (Physical Resource Blocks) in the frequency domain and can correspond to one numerology (e.g., SCS, CP length, etc.). A carrier can include up to N (e.g., 5) BWPs. Data communication can be performed via activated BWPs. Each element is called a Resource Element (RE) in the resource grid, and one complex symbol can be mapped to it.

[0069] A Bandwidth Part (BWP) is a contiguous set of physical resource blocks (PRBs) in a given numerology. PRBs can be selected from a contiguous subset of common resource blocks (CRBs) for a given numerology on a given carrier.

[0070] 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.

[0071] Referring to Figure 7, CRBs (common resource blocks) are carrier resource blocks numbered from one end of a carrier band to the other end, and PRBs are resource blocks numbered within each BWP. Point A can indicate a common reference point for the resource block grid.

[0072] BWP is point A, offset from point A (Nstart BWP ) and bandwidth (N size BWP ) For example, point A is the external reference point of the PRB of the carrier to which subcarrier 0 of all numerologies (e.g., all numerologies supported by the network on the carrier) is aligned. For example, the offset is the PRB spacing between the lowest subcarrier in a given numerology and point A. For example, the bandwidth is the number of PRBs in a given numerology.

[0073] A Sidelink Synchronization Signal (SLSS) is a sidelink (SL)-specific sequence and may include a Primary Sidelink Synchronization Signal (PSSS) and a Secondary Sidelink Synchronization Signal (SSSS). The PSSS may be referred to as a Sidelink Primary Synchronization Signal (S-PSS), and the SSSS may be referred to as a Sidelink Secondary Synchronization Signal (S-SSS). For example, length-127 M-sequences may be used for the S-PSS, and length-127 Gold sequences may be used for the S-SSS. For example, a terminal may perform initial signal detection and acquire synchronization using the S-PSS. For example, a terminal may acquire detailed synchronization and detect a synchronization signal ID using the S-PSS and S-SSS.

[0074] The PSBCH (Physical Sidelink Broadcast Channel) is 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 includes information related to SLSS, duplex mode (DM), TDDUL / DL (Time Division Duplex Uplink / Downlink) configuration, resource pool-related information, type of application related to SLSS, subframe offset, broadcast information, etc. For example, for evaluating PSBCH performance, in NR V2X, the size of the PSBCH payload is 56 bits, including a 24-bit CRC (Cyclic Redundancy Check).

[0075] The S-PSS, S-SSS, and PSBCH can be included in a block format (e.g., an S-SS (Synchronization Signal) / PSBCH block, hereinafter referred to as an S-SSB (Sidelink-Synchronization Signal Block)) that supports periodic transmission. The S-SSB can have the same numerology (i.e., SCS and CP length) as the PSCCH (Physical Sidelink Control Channel) / PSSCH (Physical Sidelink Shared Channel) in a carrier, and the transmission bandwidth is within a (pre-) configured S-BWP (Sidelink Bandwidth Part). For example, the bandwidth of the S-SSB is 11 RBs (Resource Blocks). For example, the PSBCH spans 11 RBs. The frequency location of the S-SSB can be (pre-) configured. Therefore, the terminal does not need to perform hypothesis detection in frequency to find the S-SSB in the carrier.

[0076] In this specification, PSCCH may be substituted for control channel, physical control channel, sidelink-associated control channel, sidelink-associated physical control channel, etc. In this specification, PSSCH may be substituted for shared channel, physical shared channel, sidelink-associated shared channel, sidelink-associated physical shared channel, etc.

[0077] 8 illustrates a procedure in which a terminal performs V2X or SL communication according to a resource allocation mode according to an embodiment of the present disclosure. The embodiment of FIG. 8 can be combined with various embodiments of the present disclosure.

[0078] 8(a), in resource allocation mode 1, a base station may schedule SL resources to be used by a 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 a 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.

[0079] For example, the first terminal may receive information related to dynamic grant (DG) resources and / or information related to configured grant (CG) resources from the base station. For example, the CG resources may include CG type 1 resources or CG type 2 resources. In this specification, the DG resources may be resources configured / assigned to the first terminal by the base station via downlink control information (DCI). In this specification, the CG resources may be (periodic) resources configured / assigned to the first terminal by the base station via DCI and / or an RRC message. For example, in the case of CG type 1 resources, the base station may send an RRC message including information related to the CG resources to the first terminal. For example, in the case of CG type 2 resources, the base station may send an RRC message including information related to the CG resources to the first terminal, and the base station may send a DCI related to the activation or release of the CG resources to the first terminal.

[0080] In step S810, the first terminal may transmit a PSCCH (e.g., Sidelink Control Information (SCI) or 1st-stage SCI) to a 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.) associated with the PSCCH to a second terminal. In step S830, the first terminal may receive a PSFCH associated with the PSCCH / PSSCH from a 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 a 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 preset rule. For example, the DCI may be DCI for scheduling of a SL.

[0081] Referring to (b) of FIG. 8, in resource allocation mode 2, the terminal can determine SL transmission resources within SL resources configured by the base station / network or pre-configured SL resources. For example, the configured SL resources or pre-configured SL resources may be a resource pool. For example, the terminal can autonomously select or schedule resources for SL transmission. For example, the terminal can self-select resources within a configured resource pool to perform SL communication. For example, the terminal can perform sensing and resource (re)selection procedures and self-select resources within a selection window. For example, the sensing can be performed in units of subchannels. For example, in step S810, the first terminal that self-selected resources within a resource pool can use the resources to transmit PSCCH (e.g., SCI (Sidelink Control Information) or 1 st In step S820, the first terminal transmits a PSSCH (e.g., a 2-stage SCI) associated with the PSCCH to the second terminal. nd In step S830, the first terminal may receive a PSFCH associated with the PSCCH / PSSCH from the second terminal.

[0082] Referring to (a) or (b) of FIG. 8, for example, the first terminal can transmit an SCI to the second terminal on the PSCCH. Alternatively, for example, the first terminal can transmit two consecutive SCIs (e.g., 2-stage SCIs) to the second terminal on the PSCCH and / or PSSCH. In this case, the second terminal can decode the two consecutive SCIs (e.g., 2-stage SCIs) to receive the PSSCH from the first terminal. In this specification, the SCI transmitted on the PSCCH is referred to as a 1 st SCI, 1st SCI, 1 st -stage SCI or 1 st The SCI transmitted on the PSSCH can be referred to as a 2-stage SCI format. nd SCI, 2nd SCI, 2 nd-stage SCI or 2 nd -stage SCI format.

[0083] 8(a) or 8(b), in step S630, the first terminal may receive a PSFCH. For example, the first terminal and the second terminal may determine a PSFCH resource, and the second terminal may use the PSFCH resource to transmit HARQ feedback to the first terminal.

[0084] Referring to (a) of FIG. 8, in step S640, the first terminal can transmit SL HARQ feedback to the base station via the PUCCH and / or PUSCH.

[0085] In the following, an example of a frequency range for a wireless communication system is described.

[0086] A frequency band can be defined as two types of frequency ranges. The two types of frequency ranges are FR1 and FR2 (FR2-1 and / or FR2-2). The values ​​of the frequency ranges can be changed. For example, the two types of frequency ranges are 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).

[0087] [Table 3]

[0088] As mentioned above, the numerical values ​​of the frequency ranges of the wireless communication system may be changed. For example, FR1 may include the band from 410 MHz to 7125 MHz as shown in Table 4 below. That is, FR1 may include frequency bands above 6 GHz (or 5850, 5900, 5925 MHz, etc.). For example, the frequency bands above 6 GHz (or 5850, 5900, 5925 MHz, etc.) included in FR1 may include unlicensed bands. Unlicensed bands may be used for various purposes, such as communications for vehicles (e.g., autonomous driving).

[0089] [Table 4]

[0090] An example of SCI format 1-A will be described below.

[0091] SCI format 1-A is used for scheduling the PSSCH and the second stage SCI on the PSSCH.

[0092] The following information is transmitted using SCI Format 1-A.

[0093] - Priority - 3 bits

[0094] - Frequency resource allocation - ceiling(log2(NSLsubChannel(NSLsubChannel + 1) / 2)) bits if the value of the higher layer parameter sl-MaxNumPerReserve is set to 2; otherwise, ceiling log2(NSLsubChannel(NSLsubChannel+1)(2NSLsubChannel+1) / 6) bits if the value of the higher layer parameter sl-MaxNumPerReserve is set to 3.

[0095] - Time resource allocation - 5 bits if the value of the higher layer parameter sl-MaxNumPerReserve is set to 2, otherwise 9 bits if the value of the higher layer parameter sl-MaxNumPerReserve is set to 3.

[0096] - Resource reservation cycle - ceiling(log2 Nrsv_period) bits, where Nrsv_period is the number of entries in the upper layer parameter sl-ResourceReservePeriodList if the upper layer parameter sl-MultiReserveResource is set, otherwise 0 bits

[0097] - DMRS Pattern - ceiling(log2 Npattern) bits, where Npattern is the number of DMRS patterns configured by the higher layer parameter sl-PSSCH-DMRS-TimePatternList.

[0098] - 2nd-stage SCI format - 2 bits as defined in Table 5

[0099] - Beta_Offset Indicator - 2 bits as provided by the upper layer parameter sl-BetaOffsets2ndSCI

[0100] - Number of DMRS ports - 1 bit as defined in Table 6

[0101] - Modulation and coding scheme - 5 bits

[0102] - Additional MCS table indicator - 1 bit if one MCS table is configured by the higher layer parameter sl-Additional-MCS-Table, 2 bits if two MCS tables are configured by the higher layer parameter sl-Additional-MCS-Table, 0 bit otherwise.

[0103] - PSFCH overhead indicator - 1 bit if higher layer parameter sl-PSFCH-Period = 2 or 4, otherwise 0 bit

[0104] - Reserved Bits - The number of bits determined by the higher layer parameter sl-NumReservedBits, whose value is set to 0.

[0105] [Table 5]

[0106] [Table 6]

[0107] An example of SCI format 2-A will be described below.

[0108] During HARQ operation, if the HARQ-ACK information contains an ACK or a NACK, or if the HARQ-ACK information contains only a NACK, or if there is no HARQ-ACK information feedback, SCI format 2-A is used to decode the PSSCH.

[0109] The following information is transmitted via SCI Format 2-A.

[0110] - HARQ process number - 4 bits

[0111] - New Data Indicator - 1 bit

[0112] - redundancy version - 2 bits

[0113] - Source ID - 8 bits

[0114] - Destination ID - 16 bits

[0115] - HARQ feedback enable / disable indicator - 1 bit

[0116] - Cast Type Indicator - 2 bits as defined in Table 7

[0117] CSI Request - 1 bit

[0118] [Table 7]

[0119] An example of SCI format 2-B will be described below.

[0120] In HARQ operation, if the HARQ-ACK information includes only NACK or there is no feedback of HARQ-ACK information, SCI format 2-B is used to decode the PSSCH.

[0121] The following information is transmitted via SCI Format 2-B:

[0122] - HARQ process number - 4 bits

[0123] - New Data Indicator - 1 bit

[0124] - redundancy version - 2 bits

[0125] - Source ID - 8 bits

[0126] - Destination ID - 16 bits

[0127] - HARQ feedback enable / disable indicator - 1 bit

[0128] - Zone ID - 12 bits

[0129] - Range requirements - by the higher layer parameter sl-ZoneConfigMCR-Index 4 bits to be determined

[0130] 8(a) or 8(b), in step S630, the first terminal may receive a PSFCH. For example, the first terminal and the second terminal may determine a PSFCH resource, and the second terminal may use the PSFCH resource to transmit HARQ feedback to the first terminal.

[0131] Referring to (a) of FIG. 8, in step S640, the first terminal can transmit SL HARQ feedback to the base station via the PUCCH and / or PUSCH.

[0132] 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, (a) of FIG. 9 illustrates broadcast-type SL communication, (b) of FIG. 9 illustrates unicast-type SL communication, and (c) of FIG. 9 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 in a group to which the terminal belongs. In various embodiments of the present disclosure, SL groupcast communication can be replaced with SL multicast communication, SL one-to-many communication, etc.

[0133] The Hybrid Automatic Repeat Request (HARQ) procedure will now be described.

[0134] For example, SL HARQ feedback is enabled for unicast. In this case, in non-CBG (non-Code Block Group) operation, if a receiving terminal decodes a PSCCH targeted at the receiving terminal and successfully decodes a transmission block associated with the PSCCH, the receiving terminal can generate a HARQ-ACK. The receiving terminal can then transmit the HARQ-ACK to the transmitting terminal. On the other hand, if the receiving terminal cannot successfully decode a transmission block associated with the PSCCH after decoding the PSCCH targeted at the receiving terminal, the receiving terminal can generate a HARQ-NACK. The receiving terminal can then transmit the HARQ-NACK to the transmitting terminal.

[0135] For example, SL HARQ feedback is enabled for groupcast. For example, in non-CBG operation, two types of HARQ feedback options are supported for groupcast.

[0136] (1) Groupcast Option 1: After a receiving terminal decodes a PSCCH targeted at the receiving terminal, if the receiving terminal fails to decode a transmission block associated with the PSCCH, the receiving terminal can transmit a HARQ-NACK to the transmitting terminal via a PSFCH. On the other hand, if the receiving terminal decodes a PSCCH targeted at the receiving terminal and successfully decodes a transmission block associated with the PSCCH, the receiving terminal may not transmit a HARQ-ACK to the transmitting terminal.

[0137] (2) Groupcast Option 2: After a receiving terminal decodes a PSCCH targeted at the receiving terminal, if the receiving terminal fails to decode a transmission block associated with the PSCCH, the receiving terminal can transmit a HARQ-NACK to the transmitting terminal via a PSFCH. If the receiving terminal decodes a PSCCH targeted at the receiving terminal and successfully decodes a transmission block associated with the PSCCH, the receiving terminal can transmit a HARQ-ACK to the transmitting terminal via a PSFCH.

[0138] For example, if groupcast option 1 is used for SL HARQ feedback, all terminals performing groupcast communication can share the PSFCH resource, i.e., terminals belonging to the same group can transmit HARQ feedback using the same PSFCH resource.

[0139] For example, if groupcast option 2 is used for SL HARQ feedback, each terminal performing groupcast communication can use a different PSFCH resource for HARQ feedback transmission, e.g., terminals belonging to the same group can transmit HARQ feedback using different PSFCH resources.

[0140] 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.

[0141] In the following, the UE procedure for determining the subset of resources to be reported to higher layers for PSSCH resource selection in sidelink resource allocation mode 2 will be described.

[0142] In resource allocation mode 2, higher layers may request the UE to determine a subset of resources from which the higher layers select resources for PSSCH / PSCCH transmission. To trigger this procedure, in slot n, the higher layers provide the following parameters for the PSSCH / PSCCH transmission:

[0143] -The resource pool to which the resource is reported;

[0144] -L1 priority, prioTX;

[0145] - remaining PDB (packet delay budget);

[0146] - the number L of subchannels used for PSSCH / PSCCH transmission within a slot subCH ;

[0147] Optionally, the resource reservation interval P in msec rsvpTX

[0148] If the 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 the resource set (r0, r1, r2, ...) to be re-evaluated and the resource set (r'0, r'1, r'2, ...) to be pre-empted.

[0149] -Slot r i It is up to the UE implementation to determine the subset of resources requested by higher layers 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 the TSL proc,1 Here, T SL proc,1is defined as the number of slots associated with the SCS, where μ SL This is the SCS configuration for SL BWP.

[0150] The following higher layer parameters influence the procedure:

[0151] -sl-SelectionWindowList:Internal parameter T 2min is a given prior TX The value is set to the corresponding value from the upper layer parameter sl-SelectionWindowList.

[0152] -sl-Thres-RSRP-List: This upper layer parameter is i ,p j ) provides the RSRP threshold for the combination, where p i is the priority field value contained in the received SCI format 1-A, and p j is the priority of transmission on the resource selected by the UE; in this procedure, p j =prio TX is.

[0153] -sl-RS-ForSensing selects whether the UE uses PSSCH-RSRP or PSCCH-RSRP measurements.

[0154] -sl-ResourceReservePeriodList

[0155] -sl-Sensingwindow: The internal parameter T0 is defined as the number of slots corresponding to sl-Sensingwindow msec.

[0156] -sl-TxPercentageList: given prio TX The internal parameter X for the sl-TxPercentageList(prio TX )

[0157] -sl-PreemptionEnable: If sl-PreemptionEnable is provided and is not the same as "enabled", the internal parameter prio pre is set to the parameter sl-PreemptionEnable provided by higher layers.

[0158] If the resource reservation interval P rsvp_TX is provided, the resource reservation interval is the logical slot unit P′ in msec. rsvp_TX is converted to

[0159] Notation:

[0160] (t′ SL 0, t′ SL 1, t′ SL 2,...) denotes the set of slots that belong to the sidelink resource pool.

[0161] For example, the UE may select a set of candidate resources (S A For example, when resource (re)selection is triggered, the UE may select a set of candidate resources (S A For example, when re-evaluation or pre-emption is triggered, the UE may select a set of candidate resources (S A ) can be selected.

[0162] [Table 8]

[0163] Meanwhile, partial sensing is supported for UE power saving. For example, in LTE SL or LTE V2X, the UE can perform partial sensing based on Table 9 and Table 10.

[0164] [Table 9]

[0165] [Table 10]

[0166] The following describes the synchronization acquisition of the SL terminal.

[0167] Accurate time and frequency synchronization is essential in time division multiple access (TDMA) and frequency division multiple access (FDMA) systems. Without accurate time and frequency synchronization, system performance can be degraded due to inter-symbol interference (ISI) and inter-carrier interference (ICI). The same is true for V2X. For time / frequency synchronization, the physical layer can use the sidelink synchronization signal (SLSS), and the radio link control (RLC) layer can use the master information block-sidelink-V2X (MIB-SL-V2X).

[0168] 10 illustrates a V2X synchronization source or synchronization reference according to one embodiment of the present disclosure. The embodiment of FIG. 10 can be combined with various embodiments of the present disclosure.

[0169] As shown in Figure 10, in V2X, a terminal can be directly synchronized to a global navigation satellite system (GNSS) or indirectly synchronized to a GNSS via a terminal (inside or outside of network coverage) that is directly synchronized to the GNSS. When the GNSS is set as the synchronization source, the terminal can calculate the Direct Frame Number (DFN) and subframe number using Coordinated Universal Time (UTC) and a (pre-)set DFN offset.

[0170] Alternatively, the terminal may be directly synchronized to a base station or 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, when the terminal is within network coverage, the terminal may receive synchronization information provided by the base station and be directly synchronized to the base station. The terminal may then provide synchronization information to other neighboring terminals. When base station timing is set as the synchronization reference, the terminal may follow a cell associated with the frequency (if within cell coverage at that frequency), a primary cell, or a serving cell (if outside cell coverage at that frequency) for synchronization and downlink measurements.

[0171] A base station (e.g., a serving cell) may provide synchronization settings for a carrier used for V2X or SL communication. In this case, the terminal may follow the synchronization settings received from the base station. If the terminal cannot detect any cell on the carrier used for V2X or SL communication and cannot receive synchronization settings from the serving cell, the terminal may follow the preset synchronization settings.

[0172] Alternatively, the terminal may be synchronized with another terminal that has not been able to obtain synchronization information directly or indirectly from a base station or GNSS. The synchronization source and preference may be preset in the terminal. Alternatively, the synchronization source and preference may be set via a control message provided by the base station.

[0173] The SL synchronization source can be associated with a synchronization priority. For example, the relationship between the synchronization source and the synchronization priority can be defined as shown in Table 11 or Table 12. Table 11 or Table 12 is only an example, and the relationship between the synchronization source and the synchronization priority can be defined in various ways.

[0174] [Table 11]

[0175] [Table 12]

[0176] In Table 11 or Table 12, P0 may represent the highest priority, and P6 may represent 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 configured (in advance). In single-carrier operation, the terminal may derive its transmission timing from an available synchronization reference with the highest priority.

[0177] For example, a terminal can (re)select a synchronization reference, acquire synchronization from the synchronization reference, and 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 acquired synchronization.

[0178] Positioning will now be described.

[0179] 11 illustrates an example of an architecture in a 5G system that enables positioning of a UE connected to a Next Generation-Radio Access Network (NG-RAN) or an E-UTRAN according to an embodiment of the present disclosure. The embodiment of FIG. 11 can be combined with various embodiments of the present disclosure.

[0180] As shown in Figure 11, the AMF may receive a request for a location service related to a specific target UE from another entity such as a Gateway Mobile Location Center (GMLC), or may decide to initiate a location service on behalf of the specific target UE. The AMF may then send a location service request to a Location Management Function (LMF). The LMF that receives the location service request may process the location service request and return a processing result, including the estimated location of the UE, to the AMF. Meanwhile, if the location service request is received from another entity other than the AMF, such as a GMLC, the AMF may transmit the processing result received from the LMF to the other entity.

[0181] The ng-eNB (new generation evolved-NB) and gNB are network elements of the NG-RAN that can provide measurement results for location estimation. They can measure radio signals for target UEs and transmit the measurement results to the LMF. The ng-eNB can also control several Transmission Points (TPs) such as remote radio heads or Positioning Reference Signal (PRS)-only TPs that support a PRS-based beacon system for E-UTRA.

[0182] The LMF is connected to an Enhanced Serving Mobile Location Center (E-SMLC), and the E-SMLC enables the LMF to connect to the E-UTRAN. For example, the E-SMLC enables the LMF to support Observed Time Difference Of Arrival (OTDOA), one of the E-UTRAN positioning methods, by using downlink measurements acquired by the target UE via signals transmitted from the eNB and / or a PRS-dedicated TP in the E-UTRAN.

[0183] Meanwhile, the LMF can be connected to a SUPL Location Platform (SLP). The LMF can support and manage different positioning services for the target UE. The LMF can interact with the serving ng-eNB or serving gNB for the target UE to obtain the UE's location. For positioning of the target UE, the LMF can determine a positioning method based on the Location Service (LCS) client type, required Quality of Service (QoS), UE positioning capabilities, gNB positioning capabilities, and ng-eNB positioning capabilities, and apply the positioning method to the serving gNB and / or serving ng-eNB. The LMF can then determine additional information such as a location estimate for the target UE and the accuracy of the location estimate and velocity. The SLP is a Secure User Plane Location (SUPL) entity responsible for positioning via the user plane.

[0184] The UE can measure downlink signals from sources such as NG-RAN and E-UTRAN, distinct 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 can include an LCS application and connect to the LCS application through communication with a network to which the UE is connected or through other applications included in the UE. The LCS application can include measurement and calculation functions necessary to determine the UE's location. For example, the UE can include an independent positioning function such as a Global Positioning System (GPS) and report the UE's location independently of NG-RAN transmissions. Such independently acquired positioning information can be used as supplementary information for positioning information acquired from the network.

[0185] 12 illustrates an example implementation of a network for determining the location of a UE according to one embodiment of the present disclosure. The embodiment of FIG. 12 can be combined with various embodiments of the present disclosure.

[0186] When the AMF receives a location service request while the UE is in a Connection Management-IDLE (CM-IDLE) state, the AMF may request a network-triggered service to establish a signaling connection with the UE and 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 a connected mode. However, due to reasons such as signaling and data inactivity, the signaling connection may be released by the NG-RAN during the positioning procedure.

[0187] Referring to Figure 12, the network operation process for locating a UE will be described in detail. In step 1a, a 5GC entity such as a GMLC can request a location service to locate a target UE from a serving AMF. However, even if the GMLC does not request a location service, the serving AMF can determine in step 1b that a location service is required to locate the target UE. For example, the serving AMF can determine that it directly performs a location service to locate a UE for an emergency call.

[0188] Thereafter, the AMF sends a location service request to the LMF in step 2, and the LMF can initiate location procedures with the serving ng-eNB or serving gNB to obtain location measurement data or location measurement assistance data in step 3a. Additionally, in step 3b, the LMF can initiate location procedures for downlink positioning L with the UE. For example, the LMF can send location assistance data (Assistance data defined in 3GPP TS 36.355) to the UE or obtain a location estimate or location measurement value. Meanwhile, step 3b can be performed additionally after step 3a is performed, or can be performed instead of step 3a.

[0189] In step 4, the LMF can provide a location service response to the AMF. The location service response may include information on whether the UE's location estimation was successful and the UE's location estimate. Then, when the procedure of FIG. 12 is initiated by step 1a, the AMF can transmit the location service response to a 5GC entity such as a GMLC. When the procedure of FIG. 12 is initiated by step 1b, the AMF can use the location service response to provide location services related to emergency calls, etc.

[0190] 13 illustrates an example of protocol layers used to support LTE Positioning Protocol (LPP) message transmission between an LMF and a UE according to one embodiment of the present disclosure. The embodiment of FIG. 13 may be combined with various embodiments of the present disclosure.

[0191] The LPP PDU can be transmitted via a NAS PDU between the AMF and the UE. As shown in FIG. 13, the LPP can be terminated between a target device (e.g., a UE in the control plane or a SET (SUPL Enabled Terminal) in the user plane) and a location server (e.g., an LMF in the control plane or an SLP in the user plane). The LPP message can be transmitted in the form of a transparent PDU via an intermediate network interface using an appropriate protocol, such as an NG Application Protocol (NGAP) via the NG-C (NG-Control Plane) interface or an NAS / RRC via the LTE-Uu and NR-Uu interfaces. The LPP protocol enables positioning for NR and LTE using various positioning methods.

[0192] For example, the target device and the location server can exchange capability information, assistance data for positioning, and / or location information through the LPP protocol. Also, the target device and the location server can exchange error information and / or an instruction to abort the LPP procedure through the LPP message.

[0193] 14 illustrates an example of protocol layers used to support NR Positioning Protocol A (NRPPa) PDU transmission between an LMF and an NG-RAN node in accordance with one embodiment of the present disclosure. The embodiment of FIG. 14 may be combined with various embodiments of the present disclosure.

[0194] NRPPa can be used for information exchange between the NG-RAN node and the LMF. Specifically, NRPPa can exchange the E-CID (Enhanced-Cell ID) for measurement transmitted from the ng-eNB to the LMF, data for supporting the OTDOA positioning method, Cell-ID for the NR Cell ID positioning method, and Cell Location ID. The AMF can route the NRPPa PDU based on the routing ID of the associated LMF via the NG-C interface, even if it does not have information about the associated NRPPa transaction.

[0195] The NRPPa protocol procedures for location and data collection can be divided into two types. The first type is a UE-associated procedure for transmitting information about a specific UE (e.g., location measurement information, etc.), and the second type is a non-UE-associated procedure for transmitting information applicable to NG-RAN nodes and associated TPs (e.g., gNB / ng-eNB / TP timing information, etc.). The two types of procedures can be supported independently or simultaneously.

[0196] Meanwhile, positioning methods supported by NG-RAN include GNSS, OTDOA, enhanced cell ID (E-CID), barometric sensor positioning, WLAN positioning, Bluetooth positioning, terrestrial beacon system (TBS), Uplink Time Difference of Arrival (UTDOA), etc. The location of a UE can be measured using any one of the positioning methods, but the location of a UE can also be measured using two or more positioning methods.

[0197] (1)OTDOA(Observed Time Difference Of Arrival)

[0198] FIG. 15 is a diagram for explaining an OTDOA (Observed Time Difference Of Arrival) positioning method according to an embodiment of the present disclosure.

[0199] The OTDOA positioning method utilizes timing measurements of downlink signals received by a UE from multiple TPs, including eNBs, ng-eNBs, and PRS-dedicated TPs. The UE measures the timing of the received downlink signals using location assistance data received from a location server. The UE can then determine its location based on these measurements and the geographic coordinates of neighboring TPs. The embodiment of Figure 15 can be combined with various embodiments of the present disclosure.

[0200] A UE connected to a gNB can request a measurement gap for OTDOA measurement from a TP. If the UE cannot recognize the Single Frequency Network (SFN) for at least one TP in the OTDOA assistance data, the UE can use an autonomous gap to acquire the SFN of the OTDOA reference cell before requesting a measurement gap for performing Reference Signal Time Difference (RSTD) measurement.

[0201] Here, 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, i.e., 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.

[0202] Accurate OTA 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 each of TP1, TP2, and TP3 is measured, and the RSTD for TP1-TP2, the RSTD for TP2-TP3, and the RSTD for TP3-TP1 are calculated based on the three TOAs. Based on this, a geometric hyperbola is determined, and the point where these hyperbolae intersect can be estimated as the location of the UE. In this case, since there may be accuracy and / or uncertainty for each TOA measurement, the estimated UE location may also be known as a specific range due to the measurement uncertainty.

[0203] For example, the RSTD for two TPs can be calculated based on Equation 1.

[0204]

number

[0205] where 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 other TP). i -T1) is the transmission time offset between two TPs, which can be referred to as "Real Time Differences" (RTDs), and n i , n1 may represent values ​​related to UE TOA measurement error.

[0206] (2) E-CID (Enhanced Cell ID)

[0207] In the Cell ID (CID) positioning method, the location of a UE can be determined via geographic information of the UE's serving ng-eNB, serving gNB, and / or serving cell. For example, the geographic information of the serving ng-eNB, serving gNB, and / or serving cell can be obtained via paging, registration, etc.

[0208] On the other hand, the E-CID positioning method can use additional UE measurements and / or NG-RAN radio resources to improve UE location estimates in addition to the CID positioning method. The E-CID positioning method can use some of the same measurement methods as the measurement control system of the RRC protocol, but generally does not perform additional measurements solely for UE location measurement. In other words, no separate measurement configuration or measurement control message may be provided to measure the UE's location, and the UE may report measurements obtained via commonly available measurement methods without expecting that additional measurement operations solely for location measurement are required.

[0209] For example, the serving gNB can implement the E-CID positioning method using E-UTRA measurements provided by the UE.

[0210] Examples of measurement elements that can be used for E-CID positioning include:

[0211] - UE measurement: E-UTRA RSRP (Reference Signal Received Power), E-UTRA RSRQ (Reference Signal Received Quality), UE E-UTRA reception-transmission time difference (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

[0212] - E-UTRAN measurements: ng-eNB Rx-Tx Time difference, Timing Advance (TADV), Angle of Arrival (AoA)

[0213] Here, TADV can be divided into Type 1 and Type 2 as follows.

[0214] TADV Type 1 = (ng-eNB reception-transmission time difference) + (UE E-UTRA reception-transmission time difference)

[0215] TADV Type2 = ng-eNB reception-transmission time difference

[0216] 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 the base station / TP. In this case, the geographic reference direction can 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 arrangement, the higher the accuracy of AoA measurement. If the antenna array is arranged at the same interval, signals received from adjacent antenna elements can have a constant phase change (phase-rotate).

[0217] (3)UTDOA(Uplink Time Difference of Arrival)

[0218] UTDOA is a method for estimating the arrival time of an SRS to determine the location of a UE. 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 achieve UTDOA, the E-SMLC can instruct the target UE's serving cell to instruct the target UE to transmit an SRS. The E-SMLC can also provide configurations such as whether the SRS is periodic / aperiodic, bandwidth, and frequency / group / sequence hopping.

[0219] (4) RTT (Round Trip Time)

[0220] RTT is a positioning technology that can measure the distance between a target entity and a server entity even if the two entities do not have the same time synchronization. If RTT is performed with multiple server entities, the distance from each server entity is measured, and by drawing a circle using the distances measured from each server entity, the absolute positioning of the target entity can be performed based on the intersection of the circles.

[0221] The method for performing RTT between two entities is as follows: Entity #1 transmits PRS #1 at t1, entity #2 receives the PRS #1 at t2, and after entity #2 receives the PRS #1, entity #2 transmits PRS #2 at t3, and entity #1 receives the PRS #2 at t4. If this is the case, the distance D between the two entities can be obtained as follows:

[0222] D=cx{(t4-t1)-(t3-t2)} / 2 (where c is the speed of light)

[0223] 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 16 and 18 below.

[0224] (5) Double-side RTT

[0225] 16 is a diagram illustrating a double-sided round trip time (RTT) according to an embodiment of the present disclosure. The embodiment of FIG. 16 can be combined with various embodiments of the present disclosure.

[0226] For example, here's how to perform a double-sided RTT between two entities:

[0227] For example, double-sided RTT can 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.

[0228] For example, double-sided RTT is widely used in UWB (ultra-wideband) positioning and is subject to clock errors.

[0229] For example, the propagation delay T can be estimated into two types of measurements (e.g., T round1 , T round2 , T reply1 , T reply2 ).

[0230] For example, the propagation delay T(T̂) can be calculated based on Equation 2.

[0231]

number

[0232] For example, the propagation delay T(T̂) can be calculated based on Equation 3.

[0233]

number

[0234] And T round1 ×T round2 -T reply1 ×T reply2 is Equation 4,

[0235]

number

[0236] Here, Equation 4 is as follows:

[0237]

number

[0238] Therefore, the propagation delay T(T̂) can be estimated as shown in Equation 6.

[0239]

number

[0240] In that case, for example, the error in propagation delay estimation due to clock error is as shown in Equation 7.

[0241]

number

[0242] where e UE1 and e UE2 may be the clock offset of UE1 and UE2.

[0243] The propagation delay T(T̂) may be the estimated propagation delay between UE1 and UE2.

[0244] For example, Table 13 shows the definition and usage example of RSTD (Reference signal time difference) for E-UTRA.

[0245] [Table 13]

[0246] For example, Table 14 shows a definition and usage example of DL PRS-RSRP (DL PRS reference signal received power).

[0247] [Table 14]

[0248] For example, Table 15 shows the definition and usage example of DL RSTD (DL relative signal time difference).

[0249] [Table 15]

[0250] For example, Table 16 shows the definition and usage example of UE Rx-Tx time difference.

[0251] [Table 16]

[0252] For example, Table 17 shows the UL T UL-RTOA 1 is a table showing the definition of (UL Relative Time of Arrival).

[0253] [Table 17]

[0254] For example, Table 18 shows the definition of gNB Rx-Tx time difference.

[0255] [Table 18]

[0256] For example, Table 19 shows the definition of UL AoA (UL Angle of Arrival).

[0257] [Table 19]

[0258] For example, Table 20 shows the definition of UL SRS-RSRP (UL SRS reference signal received power).

[0259] [Table 20]

[0260] In one embodiment of the present disclosure, a positioning mode can be initiated. For example, the positioning mode can include standalone, UE-based, or UE-assisted. For example, standalone can refer to a positioning mode in which the UE determines its own position based on GNSS without a PRS (without positioning error correction via a PRS). For example, "based" and "assisted" can refer to a node that is responsible for positioning calculation (and can also provide measurements) and a node that provides measurements (and does not perform positioning calculations), respectively. Thus, for example, an operation in which measurements used to calculate a position estimate are provided by the UE to the LMF can be described as "UE-assisted" (or "LMF-based"), while the UE calculating its position can be described as "UE-based."

[0261] For example, Tables 21-23 show examples of PRS Assistance Data.

[0262] [Table 21]

[0263] [Table 22]

[0264] [Table 23]

[0265] For example, Table 24 shows an example of a PRS configuration.

[0266] [Table 24]

[0267] The following words are used in the context of one embodiment of the present disclosure.

[0268] -LMF-location management function

[0269] -UE-triggered SL positioning - SL (sidelink) positioning where the positioning procedure is triggered by the UE

[0270] -gNB / LMF-triggered SL positioning - SL positioning where the procedure is triggered by gNB / LMF

[0271] UE-controlled SL positioning - SL positioning where the SL positioning group is created by the UE

[0272] -gNB-controlled SL positioning - SL positioning where the SL positioning group is created by gNB

[0273] UE-based SL positioning - SL positioning where the UE position is calculated by the UE

[0274] -UE-assisted SL positioning - SL positioning where the UE position is calculated by gNB / LMF

[0275] -SL positioning group - UEs that participate in SL positioning

[0276] -Target UE (T-UE) - UE whose position is calculated

[0277] -Server UE (S-UE) - UE that supports T-UE's SL positioning (UE that assists T-UE's SL positioning)

[0278] -MG-SL PRS measurement gap where only SL PRS transmission is allowed

[0279] -MW - Measurement window where both SL data and SL PRS can be transmitted in a multiplexed way

[0280] -SL PRS-sidelink positioning reference signal

[0281] -CCH-Control channel

[0282] -IUC message - Inter-UE coordination message. A message sent from other UEs, including RX UE, to TX UE, containing information on preferred resources and / or non-preferred resource sets suitable for TX UE to transmit to RX UE.

[0283] According to one embodiment of the present disclosure, the SL PRS transmission resources are configured with an SL PRS resource set configured with at least one of the following information:

[0284] -SL PRS resource set ID

[0285] -SL PRS resource ID list - SL PRS resource ID list in the SL PRS resource set

[0286] -SL PRS resource type - can be set to periodic, aperiodic, semi-persistent, or on-demand

[0287] -Alpha for SL PRS power control

[0288] -P0 for SL PRS power control

[0289] 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.

[0290] According to an embodiment of the present disclosure, the SL PRS resource set is configured with an SL PRS resource configured with at least one of the following information:

[0291] -SL PRS resource ID

[0292] - Inter-RE interval during which SL PRS within the SL PRS comb size-symbol is transmitted

[0293] SL PRS comb offset - RE index where the SL PRS is first transmitted in the first SL PRS symbol

[0294] -SL PRS comb cyclic shift - a cyclic shift used to generate the sequences that make up the SL PRS

[0295] -SL PRS start position - the first symbol index for transmitting SL PRS within one slot

[0296] -SL PRS# of symbols - The number of symbols that make up the SL PRS in one slot

[0297] Freq.domain shift - the lowest frequency position (index) at which the SL PRS is transmitted in the frequency domain

[0298] -SL PRS BW - Frequency Bandwidth used for SL PRS transmission

[0299] -SL PRS resource type - can be set to periodic, aperiodic, semi-persistent, or on-demand

[0300] -SL PRS periodicity - Periodicity in the time domain between SL PRS resources, physical or resource pool logical slot unit in which SL PRS is transmitted

[0301] SL PRS offset - An offset in the time domain up to the start point of the first SL PRS resource based on the reference timing, in units of a resource pool logical slot in which a physical or 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 related to the SL PRS resource.

[0302] -SL PRS sequence ID

[0303] 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.

[0304] -SL PRS CCH - SL PRS control channel. SL PRS resource configuration information and resource location can be signaled.

[0305] According to one embodiment of the present disclosure, when transmissions for SL communication and transmissions for SL positioning are performed in the same shared resource pool, it may be necessary to define a slot structure for the SL communication and SL positioning transmissions in the shared resource pool.

[0306] In this disclosure, a method and operation for configuring a slot structure that allows SL positioning to be performed while maintaining backward compatibility with devices that only perform SL communication under the operating conditions (described above) and a device that supports the same are proposed.

[0307] As an example, if channels / signals for SL communication and channels / signals for SL positioning are transmitted in the same shared resource pool, if the two types of channels / signals are transmitted sharing the same slot, a problem may arise in which a device that only supports SL communication cannot decode channels / signals for SL positioning, which would result in a failure to meet backward compatibility.

[0308] According to one embodiment of the present disclosure, to solve the above problem, for example, the shared resource pool configuration may be configured (in advance) so that slots for SL communication and slots for SL positioning do not overlap in the time domain in the shared resource pool. For example, in the shared resource pool configuration, slots for SL communication and slots for SL positioning may be configured (in advance) periodically in the time domain within the resource pool. For example, the shared resource pool configuration may be configured (in advance) so that slots with even indices are used for slots for SL communication and / or slots with odd indices are used for slots for SL positioning.

[0309] For example, when SL PRS transmission is performed in the shared resource pool, when a channel busy ratio (CBR) measurement is performed to determine the SL PRS transmission parameters, a final received signal strength indicator (RSSI) threshold may be determined as a value obtained by subtracting a (pre-) set offset value from a (pre-) set RSSI threshold for SL communication in the shared resource pool. For example, the reason for performing this operation may be to compensate for the actual measured received signal strength indicator (RSSI) being measured relatively low when the RSSI is measured based on the SL PRS bandwidth based on SL PRS configuration information, since the bandwidth of a subchannel used for SL communication may be smaller than the SL PRS bandwidth.

[0310] As an example, when SL PRS resources are reserved based on UE sensing, sensing may be performed only for the periodically configured SL positioning slots within a sensing window, and / or candidate resource exclusion and / or selection operations may be performed only for candidate resources included in the periodically configured SL positioning slots within a selection window based on the sensing results.

[0311] For example, if a UE reserves N>3 SL PRS transmission resources, the UE may signal up to three of the reserved SL PRS transmission resources through a first SCI used for SL communication, and / or the UE may signal which of the N transmission resources the maximum three SL PRS transmission resources are via a second SCI. For example, the index of the first transmission resource of the maximum three SL PRS transmission resources is signaled via the second SCI. For example, the index of the last transmission resource of the maximum three SL PRS transmission resources is signaled via the second SCI, thereby allowing the RX UE to know how many SL PRS transmission resources are reserved in the future.

[0312] For example, when SL HARQ feedback is enabled in the shared resource pool and / or when a PSFCH resource for transmitting the SL HARQ feedback is periodically configured in the shared resource pool, the slot period in which the SL positioning slot is configured may be configured to be the same as the slot period in which the PSFCH resource is configured. In this case, for example, the SL positioning slot index and the slot index in which the PSFCH resource is configured are configured to have a difference of a (pre-set) offset so that the slot in which the SL positioning slot is configured and the slot in which the PSFCH resource is configured do not overlap each other.

[0313] According to one embodiment of the present disclosure, when (in the case described above), for example, a PT-RS (phase-tracking reference signal(s)) is transmitted in the SL positioning slot for the purpose of phase tracking of a received signal, the PT-RS is transmitted in the SL positioning slot in the same manner as at least one of the following:

[0314] For example, the PT-RS transmission may be omitted in the symbol interval in which the SL PRS is transmitted in the SL positioning slot.

[0315] As an example, PT-RS transmission can be omitted in the symbol interval in which the SL PRS is transmitted and / or in resource locations in the frequency domain that overlap with the SL PRS (e.g., resource elements or sub-carriers).

[0316] For example, in a slot in the shared resource pool, a PT-RS is transmitted even in a symbol in which a SL PRS is not transmitted.

[0317] As an example, the PT-RS is transmitted in the PSSCH symbol interval.

[0318] As an example, when multiple SL PRS transmissions are permitted in one slot, the PT-RS is transmitted in a symbol interval in which the PSSCH and / or SL PRS is not transmitted.

[0319] As an example, the PT-RS is transmitted in the SL PRS symbol interval where no transmission is performed due to a muting pattern.

[0320] As an example, PT-RS transmission can be omitted in symbols in the slot where PSCCH / PSSCH and / or SL PRS is not transmitted.

[0321] As an example, within a shared (SL PRS) resource pool and / or within an (OFDM) symbol in which the SL PRS is transmitted, the transmission of the PT-RS can be canceled.

[0322] According to various embodiments of the present disclosure, an efficient method is proposed for configuring a slot structure in a shared resource pool for SL positioning and SL communication that is backward compatible with devices that only support SL communication.

[0323] According to one embodiment of the present disclosure, for example, when a resource pool in which an SL PRS for SL positioning is transmitted and a resource pool in which a channel / signal associated with the SL PRS is transmitted are different from each other, it may be necessary to define a method for selecting resources for transmitting the SL PRS and a channel / signal associated with the SL PRS.

[0324] In this disclosure, a method and operation for selecting the SL PRS transmission candidate resources and transmission resources for the channels / signals associated with the SL PRS on a random selection basis under the conditions (mentioned above, as described above), and an apparatus supporting the same, are proposed.

[0325] According to one embodiment of the present disclosure, for example, when SL positioning is performed, if an SL PRS is transmitted in resource pool B (e.g., a dedicated resource pool for SL PRS transmission) and / or a channel / signal associated with the SL PRS can be transmitted in resource pool A (e.g., a shared resource pool for transmitting SL communication channels / signals and positioning trigger / control information, SCI, measurement results, and / or location information associated with the SL PRS), the UE may select the SL PRS and associated transmission resources on a random selection basis in at least one of the following ways:

[0326] For example, as an example, SCI transmission resources in resource pool A can be selected randomly (which can be extended to PSCCH (resources) and / or PSSCH (resources) transmitting above / below SCI), and / or SL PRS transmission resources in resource pool B can be selected on a sensing basis.

[0327] As an example, when aperiodic SL PRS transmission resource selection is triggered and / or the required SL PRS transmission latency is short, an SCI transmission resource associated with the SL PRS can be randomly selected within a relatively short time interval after the SL PRS transmission resource selection trigger to meet the latency requirement for the SL PRS transmission.

[0328] As an example, the SL PRS transmission resource may be selected based on sensing for the (1st SCI and / or) 2nd SCI in resource pool A.

[0329] As an example, the actions (described above) may be performed only if the priority associated with the SL PRS and / or the SCI, or the representative priority value associated with the SL PRS, is less than or equal to a (pre-)set threshold.

[0330] For example, the representative priority value may be determined as the maximum / minimum value of the SL PRS priority value and the associated SCI priority value.

[0331] As an example, the above-mentioned operations may be performed only if the CBR (channel busy ratio) value of the resource pool A and / or the CBR (channel busy ratio) value of the resource pool B, or a CBR (channel busy ratio) value representing the two CBR (channel busy ratio) values, is equal to or less than a (pre-set) threshold.

[0332] For example, the representative CBR (channel busy ratio) value may be determined as the average value or maximum / minimum value of the CBR (channel busy ratio) value of the resource pool A and the CBR (channel busy ratio) value of the resource pool B.

[0333] By way of example, the actions (as described above) may be determined based on the latency requirement for SL PRS transmission, the number of periodic / repeated transmissions of SL PRS, and / or whether feedback-based retransmissions are possible in response to SL PRS reception.

[0334] As an example, the actions (described above) may only occur if resource pool A is (pre-) configured to allow random resource selection.

[0335] According to one embodiment of the present disclosure, as an example, SCI transmission resources in resource pool A may be selected on a sensing basis, and SL PRS transmission resources in resource pool B may be selected randomly.

[0336] As an example, in the case of a UE operating / configured in power saving (DRX (discontinuous reception)), the second SCI transmitting SL PRS reservation information transmitted in resource pool B may not be received / decoded in resource pool A, and / or the SL PRS (transmission resource) may be transmitted (selected) randomly.

[0337] For example, SL PRS detection performance may be good even at low SINR (Signal-to-Interference-plus-Noise Ratio), so performance degradation due to resource collisions may not be significant even if SL PRS transmission resources are randomly selected within the latency requirement ((remaining) delay budget).

[0338] As an example, if the number of PSCCH / PSSCH symbols transmitting the SCI in resource pool A is below a (pre-) set threshold, and / or there is no RSRP (Reference Signal Received Power) measurement result for the SL PRS in resource pool B related to the 2nd SCI sensed in resource pool A or the number of the SL PRS resources is below a (pre-) set threshold, the SL PRS candidate resource indicated by the 2nd SCI can be regarded as a non-monitored resource and / or excluded from the candidate resources, and / or if the number of remaining candidate resources after the candidate resource elimination operation is performed is smaller than the number of target candidate resources, the excluded candidate resource can be restored again and / or (in the above-mentioned cases) the SL PRS resource can be randomly selected.

[0339] As an example, the SL SCI transmission resource can be selected based on sensing for the 1st SCI in resource pool A.

[0340] For example, the actions (as described above) may be determined based on the priority associated with the SL PRS, the channel busy ratio (CBR) value in resource pool A and / or B, the latency requirement for SL PRS transmission, the number of periodic / repeated transmissions of the SL PRS, whether feedback-based retransmission is enabled for SL PRS reception, etc.

[0341] As an example, the actions (described above) are only performed if resource pool B is (pre-) configured to allow random resource selection.

[0342] For example, as an example, the SCI transmission resources in resource pool A and the SL PRS transmission resources in resource pool B may all be selected randomly.

[0343] As an example, if the SL PRS transmission resource is randomly selected in resource pool B, the SCI transmission resource associated with the SL PRS may also be randomly selected in resource pool A.

[0344] For example, the actions (as described above) may be determined based on the priority associated with the SL PRS, the channel busy ratio (CBR) value in resource pools A and / or B, the latency requirement for the SL PRS transmission, the number of periodic / repeated transmissions of the SL PRS, and / or whether feedback-based retransmission is possible for the SL PRS reception.

[0345] As an example, the actions (described above) may only occur if resource pools A and B are both configured (pre-configured) to allow random resource selection.

[0346] As an example, if a one-to-one correspondence relationship between the time / frequency domain locations of SCI resources in resource pool A and the time / frequency domain locations of SL PRS resources in resource pool B is configured or defined (in advance), SCI transmission resources in resource pool A can be randomly selected and / or can be selected in relation to SL PRS transmission resources in resource pool B based on the one-to-one correspondence relationship.

[0347] According to various embodiments of the present disclosure, when a resource pool in which an SL PRS for SL positioning is transmitted is different from a resource pool in which a channel / signal associated with the SL PRS is transmitted, an efficient method is proposed for randomly selecting transmission resources for transmitting the SL PRS and associated channels / signals.

[0348] 17 is a diagram illustrating a problem in performing wireless communication related to positioning according to an embodiment of the present disclosure. The embodiment of FIG. 17 can be combined with various embodiments of the present disclosure.

[0349] 17, according to one embodiment of the present disclosure, for example, a target UE may be a UE / SUPL (secure user plane location) SET (SUPL Enabled Terminal) that is being positioned. For example, at least one server UE / location server (e.g., a base station, LMF (location management function), TRP (transmission-reception point), E-SMLC (enhanced serving mobile location center), SUPL (secure user plane location) SLP (SULP location platform), etc.) may be a physical or logical entity that assists, requests, or manages positioning for the target UE.

[0350] For example, the target UE and / or server UE(s) may acquire information related to the (SL) PRS (e.g., from a base station, from (pre)configuration of the target UE / server UE). For example, the information related to the SL PRS may include at least one of information on a sidelink (SL) PRS (positioning reference signal) resource identity, information on an SL PRS comb offset, information on an SL PRS comb size, information on an SL PRS starting symbol, or information on the number of SL PRS symbols.

[0351] For example, a SL positioning group may be formed between the target UE and the server UE(s).

[0352] For example, the UE may configure one or more resource pools. For example, the resource pool may be for transmitting / receiving the PSSCH / PSCCH and / or transmitting / receiving the SL PRS. For example, the resource pool may be associated with either resource allocation mode 1 or resource allocation mode 2. For example, the resource selection (allocation) method (enabled) for resources in the resource pool may be selected (determined / configured). For example, the resource selection (allocation) method (enabled) for resources in the resource pool may include at least one of full sensing, partial sensing (periodic-based / contiguous), and / or random selection (without sensing).

[0353] For example, the target UE may perform SL positioning (e.g., TDOA (e.g., UL-TDOA) / RTT / double-sided RTT positioning) for the target UE. For example, based on the Mode 2 resource allocation mode, the target UE may self-select resources for SL PRS within a resource pool. For example, based on the Mode 2 resource allocation mode, the target UE may self-select resources for PSSCH / PSCCH within a resource pool. For example, the target UE may trigger a resource (re)selection procedure in slot n. For example, the target UE may self-select resources for SL PRS within a resource pool within a selection window based on (selected / configured) sensing. For example, the sensing may include at least one of full sensing, (periodic-based / contiguous) partial sensing, and / or random selection (without sensing).

[0354] For example, the sensing may be performed via RSRP measurements performed based on control information (e.g., SCI) received via a PSCCH / PSSCH for the SL PRS, e.g., the PSCCH / PSSCH is received based on resources in a resource pool.

[0355] For example, a transmission resource for the SL PRS may be selected by a higher layer from among the final at least one candidate resource (a subset of candidate resources) selected within a selection window based on the sensing among candidate resources in a resource pool. For example, a transmission resource for the PSSCH / PSCCH may be selected by a higher layer from among the final at least one candidate resource (a subset of candidate resources) selected within a selection window based on the sensing among candidate resources in a resource pool. For example, the target UE may transmit information (e.g., SCI) regarding the transmission resource (e.g., reserved resource) for the SL PRS to the server UE via the selected PSSCH / PSCCH resource. For example, the target UE may transmit the SL PRS to the server UE based on the transmission resource for the selected SL PRS.

[0356] For example, SL positioning for a target UE can be performed based on the SL PRS (eg, the transmission time of the SL PRS, the reception time of the SL PRS).

[0357] Therefore, according to one embodiment of the present disclosure, for example, resource selection (sensing) mechanisms for transmission resources for SL PRS and transmission resources for PSSCH / PSCCH can be selected / configured identically or independently. For example, the transmission resources for SL PRS and transmission resources for PSSCH / PSCCH can be selected / configured identically or independently. For example, if the SL PRS transmission resources and PSSCH / PSCCH transmission resources are all selected based on random selection, collisions between the selected transmission resources may occur frequently. For example, due to the resource collision issue, the SL PRS may not be transmitted or received properly. Conversely, if the SL PRS transmission resources and PSSCH / PSCCH transmission resources are all selected based on the same pool sensing, differences in delay time, priority, etc. may not be taken into consideration, and therefore, any one of the service requirements may not be satisfied. Therefore, for example, SL positioning (e.g., TDOA / RTT / double-sided RTT) based on the SL PRS may not be performed properly.

[0358] 18 is a diagram illustrating a procedure for performing wireless communication related to positioning according to an embodiment of the present disclosure. The embodiment of FIG. 18 can be combined with various embodiments of the present disclosure.

[0359] 18, according to one embodiment of the present disclosure, for example, a target UE may be a UE / SUPL (secure user plane location) SET (SUPL Enabled Terminal) that is being positioned. For example, at least one server UE / location server (e.g., a base station, LMF (location management function), TRP (transmission-reception point), E-SMLC (enhanced serving mobile location center), SUPL (secure user plane location) SLP (SULP location platform), etc.) may be a physical or logical entity that assists, requests, or manages positioning for the target UE.

[0360] For example, the target UE and / or the server UE(s) may obtain information related to the (SL)PRS configuration.

[0361] For example, a SL positioning group is formed between the target UE and the server UE(s).

[0362] For example, the UE may configure one or more resource pools. For example, the resource pools may be for transmitting / receiving PSSCH / PSCCH and / or for transmitting / receiving SL PRS. For example, the resource pools may include a first resource pool that can be used for transmitting both SL PRS and PSSCH / PSCCH. For example, the resource pools may include a second resource pool that can be used for transmitting SL PRS but cannot be used for transmitting PSSCH / PSCCH. For example, the resource pools may be associated with either resource allocation mode 1 or resource allocation mode 2.

[0363] For example, the UE may acquire at least one of first information related to SCI (PSSCH / PSCCH) transmission / reception in a first resource pool or second information related to SL PRS transmission / reception in a second resource pool. For example, the UE may acquire at least one of information related to a first resource selection mechanism for the SCI (PSSCH / PSCCH) transmission / reception or information related to a second resource selection mechanism for the SL PRS transmission / reception based on at least one of the first information or the second information. For example, the resource selection mechanism may include at least one of pool sensing (full sensing), partial sensing (periodic-based / contiguous), and / or random selection (without sensing). For example, the UE may acquire configuration information related to pool sensing / partial sensing for the SCI transmission / reception or configuration information related to random selection for the SL PRS transmission / reception based on the first information or the second information.

[0364] For example, the UE may acquire, based on the first information or the second information, at least one of information on a first resource for transmitting / receiving the SCI (PSSCH / PSCCH) or information on a second resource for transmitting / receiving the SL PRS. For example, the UE may acquire, based on the first information or the second information, at least one of information on a first resource for transmitting / receiving the SCI or information on a second resource related to the first resource. For example, the UE may acquire, based on the first information or the second information, at least one of information on a second resource for transmitting / receiving the SL PRS or information on a first resource related to the second resource.

[0365] For example, the target UE may perform SL positioning (e.g., TDOA (e.g., UL-TDOA) / RTT / double-sided RTT positioning) for the target UE. For example, based on the Mode 2 resource allocation mode, the target UE may self-select resources for the SL PRS in the first resource pool. For example, the target UE may trigger a resource (re)selection procedure in slot n1. For example, the target UE may self-select resources for the SL PRS in the first resource pool and within the selection window based on the first resource selection mechanism. For example, the target UE may self-select resources for the SL PRS in the first resource pool and within the selection window based on the second resource selection mechanism.

[0366] For example, based on the Mode 2 resource allocation mode, the target UE may self-select resources for SCI transmission (PSSCH / PSCCH) in the second resource pool. For example, the target UE may trigger a resource (re)selection procedure in slot n2. For example, the target UE may self-select resources for SCI transmission (PSSCH / PSCCH) in the second resource pool and within the selection window based on the second resource selection mechanism. For example, the target UE may self-select resources for SL PRS in the second resource pool and within the selection window based on the first resource selection mechanism.

[0367] For example, the target UE may transmit information (e.g., SCI) regarding transmission resources (e.g., reserved resources) for the SL PRS to the server UE via the selected PSSCH / PSCCH resources. For example, the target UE may transmit the SL PRS to the server UE based on the selected transmission resources for the SL PRS.

[0368] For example, SL positioning for a target UE can be performed based on the SL PRS (eg, the transmission time of the SL PRS, the reception time of the SL PRS).

[0369] For example, the first device and / or the second device may perform SL positioning based on the SCI and / or the (transmission / reception time of) the SL PRS.

[0370] Therefore, according to one embodiment of the present disclosure, for example, resource selection (sensing) mechanisms for transmission resources for SL PRS and transmission resources for PSSCH / PSCCH may be selected / configured differently or interrelatedly. For example, the transmission resources for SL PRS and the transmission resources for PSSCH / PSCCH may be selected / configured differently or interrelatedly. For example, if the SL PRS transmission resources / PSSCH / PSCCH transmission resources are selected based on random selection / sensing (pool sensing, partial sensing, etc.), respectively, the performance degradation related to resource reservation may be smaller for the SL PRS than for the PSSCH / PSCCH, thereby reducing collisions between selected transmission resources. For example, since the resource collision problem is prevented, the SL PRS can be transmitted and received normally. For example, if the SL PRS transmission resources / PSSCH / PSCCH transmission resources are selected based on random selection / sensing (pool sensing, partial sensing, etc.), respectively, differences in delay time, priority, etc. are taken into consideration, and all of the respective service requirements can be satisfied. Therefore, for example, the performance of SL positioning (eg, TDOA / RTT / double-side RTT) based on SL PRS can be improved.

[0371] For example, the applicability of the rules and / or the parameter values ​​related to the proposed method / rule of the present disclosure may be set / enabled specific to a service type (or differently or independently). For example, the applicability of the rules and / or the parameter values ​​related to the proposed method / rule of the present disclosure may be set / enabled specific to a priority (LCH or service) (or differently or independently). For example, the applicability of the rules and / or the parameter values ​​related to the proposed method / rule of the present disclosure may be set / enabled specific to a QoS requirement (e.g., latency, reliability, minimum communication range) (or differently or independently). For example, the applicability of the rules and / or the parameter values ​​related to the proposed method / rule of the present disclosure may be set / enabled specific to a PQI parameter (or differently or independently). For example, the applicability of the rules and / or the parameter values ​​related to the proposed method / rule of the present disclosure may be set / enabled specific to a HARQ feedback ENABLED LCH / MAC PDU (transmission) (or differently or independently). For example, the applicability of the rules and / or parameter values ​​related to the proposed method / rules of the present disclosure may be set / enabled specifically (or differently or independently) for HARQ feedback DISABLED LCH / MAC PDUs (transmissions). For example, the applicability of the rules and / or parameter values ​​related to the proposed method / rules of the present disclosure may be set / enabled specifically (or differently or independently) for CBR measurement values ​​of a resource pool. For example, the applicability of the rules and / or parameter values ​​related to the proposed method / rules of the present disclosure may be set / enabled specifically (or differently or independently) for SL cast types (e.g., unicast, groupcast, broadcast). For example, the applicability of the rules and / or parameter values ​​related to the proposed method / rules of the present disclosure may be set / enabled specifically (or differently or independently) for SL groupcast HARQ feedback options (e.g., NACK-only feedback, ACK / NACK feedback, TX-RX distance-based NACK-only feedback).For example, the applicability of the rules and / or the parameter values ​​related to the proposed method / rules of the present disclosure may be set / enabled specific to (or different from or independently of) the SL Mode 1 CG type (e.g., SL CG Type 1 or SL CG Type 2). For example, the applicability of the rules and / or the parameter values ​​related to the proposed method / rules of the present disclosure may be set / enabled specific to (or different from or independently of) the SL mode type (e.g., Mode 1 or Mode 2). For example, the applicability of the rules and / or the parameter values ​​related to the proposed method / rules of the present disclosure may be set / enabled specific to (or different from or independently of) the resource pool. For example, the applicability of the rules and / or the parameter values ​​related to the proposed method / rules of the present disclosure may be set / enabled specific to (or different from or independently of) the resource pool in which the PSFCH resource is configured. For example, the applicability of the rules and / or the parameter values ​​related to the proposed method / rules of the present disclosure may be set / enabled specific to (or different from or independently of) the source (L2) ID. For example, the applicability of the rules and / or parameter values ​​related to the proposed method / rules of the present disclosure may be set / enabled specific to (or different from or independently of) a destination (L2) ID. For example, the applicability of the rules and / or parameter values ​​related to the proposed method / rules of the present disclosure may be set / enabled specific to (or different from or independently of) a PC5 RRC connection link. For example, the applicability of the rules and / or parameter values ​​related to the proposed method / rules of the present disclosure may be set / enabled specific to (or different from or independently of) an SL link. For example, the applicability of the rules and / or parameter values ​​related to the proposed method / rules of the present disclosure may be set / enabled specific to (or different from or independently of) a connection state (with a base station) (e.g., RRC CONNECTED state, IDLE state, INACTIVE state). For example, the applicability of the rules and / or parameter values ​​related to the proposed method / rules of the present disclosure may be set / enabled specific to (or different from or independently of) an SL HARQ process (ID).For example, whether or not the rules are applicable and / or parameter values ​​related to the proposed method / rules of the present disclosure can be set / enabled to specify (or be different or independent of) whether or not a SL DRX operation is performed (by a TX UE or an RX UE). For example, whether or not the rules are applicable and / or parameter values ​​related to the proposed method / rules of the present disclosure can be set / enabled to specify (or be different or independent of) whether or not a power-saving (TX or RX) UE is enabled. For example, whether or not the rules are applicable and / or parameter values ​​related to the proposed method / rules of the present disclosure can be set / enabled to specify (or be different or independent of) whether or not a PSFCH TX and a PSFCH RX (and / or multiple PSFCH TXs (beyond UE capability)) overlap (and / or if a PSFCH TX (and / or PSFCH RX) is omitted) (from the perspective of a specific UE). For example, the applicability of the rules and / or the parameter values ​​related to the proposed method / rules of the present disclosure can be set / allowed specifically (or differently or independently) when a PSCCH (and / or PSSCH) (re)transmission is actually (successfully) received from a TX UE to an RX UE.

[0372] For example, in the present disclosure, the term "configuration (or designation)" can be interpreted in an expanded manner to mean a form in which a base station notifies a terminal via a predefined (physical layer or higher layer) channel / signal (e.g., SIB, RRC, MACCE) (and / or a form provided via pre-configuration and / or a form in which a terminal notifies other terminals via a predefined (physical layer or higher layer) channel / signal (e.g., SL MACCE, PC5 RRC)), etc.

[0373] 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 methods of the present disclosure can be combined with each other and used in an extended manner (in a new form of method).

[0374] For example, in this disclosure, a specific threshold refers to a threshold that is predefined or set (in advance) by a higher layer (including an application layer) of a network, a base station, or a terminal. For example, in this disclosure, a specific setting value refers to a value that is predefined or set (in advance) by a higher layer (including an application layer) of a network, a base station, or a terminal. For example, an operation set by a network / base station refers to an operation that the base station sets (in advance) in the UE via higher layer RRC signaling, sets / signals to the UE via MACCE, or signals to the UE via DCI.

[0375] 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 can be combined with various embodiments of the present disclosure.

[0376] 19, according to one embodiment of the present disclosure, in step S1910, for example, the first device may acquire information related to PT-RS transmission. In step S1920, for example, the first device may acquire information related to the SL PRS, including at least one of information related to an SL PRS resource ID, information related to an SL PRS comb offset, information related to an SL PRS comb size, information related to an SL PRS starting symbol, or information related to the number of SL PRS symbols. In step S1930, for example, the first device may perform SL PRS transmission based on the information related to the SL PRS. For example, the PT-RS transmission may be canceled within a symbol in which the SL PRS is transmitted.

[0377] Additionally or alternatively, the PT-RS transmission can be canceled based on the SL PRS transmission and the PT-RS transmission overlapping within the symbol in which the SL PRS is transmitted.

[0378] Additionally or alternatively, the first device may obtain information related to a SL resource pool.

[0379] Additionally or alternatively, the PT-RS transmission may be cancelled (i) within the SL resource pool and (ii) within the symbol in which the SL PRS is transmitted.

[0380] Additionally or alternatively, the SL resource pool may include a shared resource pool that can be used for both the SL PRS transmission and a physical sidelink shared channel (PSSCH) transmission.

[0381] Additionally or alternatively, the first device may obtain information related to a SL resource pool.

[0382] Additionally or alternatively, the PT-RS transmission can be canceled based on (i) the SL PRS transmission being performed within an SL PRS resource in the SL resource pool, and (ii) the PT-RS transmission being performed within an SL PRS resource in the SL resource pool. Additionally or alternatively, the PT-RS transmission can be canceled (i) within the symbol in which the SL PRS is transmitted and (ii) within the frequency domain in which the SL PRS is transmitted.

[0383] Additionally or alternatively, the information related to the PT-RS transmission may include information related to a frequency domain for the PT-RS transmission.

[0384] Additionally or alternatively, the frequency range may include a frequency range in the frequency range above 24250 MHz.

[0385] Additionally or alternatively, the PT-RS transmission can be performed within resources used for a physical sidelink shared channel (PSSCH). Additionally or alternatively, the SL PRS resources for the SL PRS can be configured to not overlap with physical sidelink shared channel (PSSCH) resources.

[0386] Additionally or alternatively, the RSSI (Received Signal Strength Indicator) threshold for CBR (Channel Busy Ratio) measurement for the SL PRS may be related to the RSSI threshold for CBR measurement for the PSSCH (Physical Sidelink Shared Channel).

[0387] Additionally or alternatively, the first device may transmit control information over a control channel.

[0388] Additionally or alternatively, the control information may include information for identifying SL PRS resources for the SL PRS.

[0389] Additionally or alternatively, the first sidelink control information (SCI) may be transmitted via a physical sidelink control channel (PSCCH).

[0390] Additionally or alternatively, the first SCI may include information regarding reserved SL resources.

[0391] Additionally or alternatively, the first device may transmit second sidelink control information (SCI) via a physical sidelink shared channel (PSSCH).

[0392] Additionally or alternatively, the second SCI may include index information regarding the reserved SL resources.

[0393] Additionally or alternatively, the first device may obtain information related to a SL resource pool.

[0394] Additionally or alternatively, based on the configuration of a PSFCH (physical sidelink feedback channel) resource in the SL resource pool, the period of the PSFCH resource may be related to the period of the SL PRS. According to one embodiment of the present disclosure, for example, by solving a problem when a PT-RS for correcting a phase error (phase noise) on a transmitter and an SL PRS overlap in time, the quality of positioning service can be improved. For example, when a PT-RS for correcting a phase error (phase noise) on a transmitter and an SL PRS overlap in time, the priority of the PT-RS can be lowered below the priority of the SL PRS, thereby improving positioning accuracy.

[0395] For example, the first device may acquire at least one of first information related to SCI transmission in a first resource pool or second information related to SL PRS transmission in a second resource pool. For example, the first resource pool may include a shared resource pool that can be used for transmitting both SL PRS and PSSCH / PSCCH. For example, the second resource pool may include a dedicated resource pool that can be used for transmitting SL PRS but cannot be used for transmitting PSSCH / PSCCH.

[0396] For example, the first device may acquire at least one of information regarding a first resource selection mechanism for the SCI transmission or information regarding a second resource selection mechanism for the SL PRS transmission based on at least one of the first information or the second information. For example, the first resource selection mechanism and / or the second resource selection mechanism may include at least one of full sensing, (periodic-based / contiguous) partial sensing, and / or random selection (without sensing).

[0397] For example, the first device may select resources for the PSSCH / PSCCH based on the first resource selection mechanism.

[0398] For example, the first device may select resources for the SL PRS based on the second resource selection mechanism.

[0399] For example, the first device may transmit the first SCI / second SCI based on the resources related to the PSCCH / PSSCH.

[0400] For example, the first device may transmit a SL PRS based on the resources for the SL PRS.

[0401] 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 stores instructions that, when executed by the processor 102, cause the first device (e.g., the processor 102, the transceiver 106) to perform operations. For example, the operations may include, by the first device (e.g., the processor 102, the transceiver 106): acquiring information related to a phase-tracking reference signal (PT-RS) transmission; acquiring information related to a sidelink (SL) positioning reference signal (PRS), including at least one of information related to an SL PRS resource identity, information related to an SL PRS comb offset, information related to an SL PRS comb size, information related to an SL PRS starting symbol, or information related to the number of SL PRS symbols; and performing an SL PRS transmission based on the information related to the SL PRS; wherein the PT-RS transmission can be canceled during a symbol in which the SL PRS is transmitted.

[0402] In one embodiment, a first device for wireless communication is provided. The first device may include at least one transceiver; at least one processor; and at least one memory executablely connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the first device to perform operations. For example, the operations may include at least one of: acquiring information related to a phase-tracking reference signal (PT-RS) transmission; acquiring information related to a sidelink (SL) positioning reference signal (PRS), including at least one of information related to an SL PRS resource identity, information related to an SL PRS comb offset, information related to an SL PRS comb size, information related to an SL PRS starting symbol, or information related to a number of SL PRS symbols; and performing an SL PRS transmission based on the information related to the SL PRS, wherein the PT-RS transmission can be canceled within a symbol in which the SL PRS is transmitted.

[0403] 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 executablely connected to the at least one processor and storing instructions that cause the first device to perform operations based on execution by the at least one processor. For example, the operations may include at least one of: acquiring information related to a phase-tracking reference signal (PT-RS) transmission; acquiring information related to a sidelink (SL) positioning reference signal (PRS), including at least one of information related to an SL PRS resource identity, information related to an SL PRS comb offset, information related to an SL PRS comb size, information related to an SL PRS starting symbol, or information related to a number of SL PRS symbols; and performing an SL PRS transmission based on the information related to the SL PRS, wherein the PT-RS transmission can be canceled within a symbol in which the SL PRS is transmitted.

[0404] In one embodiment, a non-transitory computer-readable storage medium is proposed having instructions recorded thereon, which, when executed by at least one processor, can cause a first device to perform operations, for example, the operations can include at least one of: acquiring information related to a phase-tracking reference signal (PT-RS) transmission; acquiring information related to a sidelink (SL) positioning reference signal (PRS), including at least one of information related to an SL PRS resource identity, information related to an SL PRS comb offset, information related to an SL PRS comb size, information related to an SL PRS starting symbol, or information related to a number of SL PRS symbols; and performing an SL PRS transmission based on the information related to the SL PRS, wherein the PT-RS transmission can be canceled within a symbol in which the SL PRS is transmitted.

[0405] 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 can be combined with various embodiments of the present disclosure.

[0406] Referring to FIG. 20 , according to one embodiment of the present disclosure, in step S2010, for example, the second device may acquire information related to phase-tracking reference signal (PT-RS) reception. In step S2020, for example, the second device may acquire information related to a sidelink (SL) positioning reference signal (PRS), including at least one of information related to an SL PRS resource identity, information related to an SL PRS comb offset, information related to an SL PRS comb size, information related to an SL PRS starting symbol, or information related to the number of SL PRS symbols. In step S2030, for example, the second device may perform SL PRS reception based on the information related to the SL PRS. For example, the PT-RS reception may be canceled within a symbol in which the SL PRS is received.

[0407] Additionally or alternatively, the PT-RS transmission can be canceled based on the SL PRS transmission and the PT-RS transmission overlapping within the symbol in which the SL PRS is transmitted.

[0408] Additionally or alternatively, information relating to the SL resource pool may be obtained.

[0409] Additionally or alternatively, the PT-RS transmission may be cancelled (i) within the SL resource pool and (ii) within the symbol in which the SL PRS is transmitted.

[0410] Additionally or alternatively, the SL resource pool may include a shared resource pool that can be used for both the SL PRS transmission and a physical sidelink shared channel (PSSCH) transmission.

[0411] Additionally or alternatively, information relating to the SL resource pool may be obtained.

[0412] Additionally or alternatively, the PT-RS transmission can be canceled based on (i) the SL PRS transmission being performed within an SL PRS resource in the SL resource pool, and (ii) the PT-RS transmission being performed within an SL PRS resource in the SL resource pool. Additionally or alternatively, the PT-RS transmission can be canceled (i) within the symbol in which the SL PRS is transmitted and (ii) within the frequency domain in which the SL PRS is transmitted.

[0413] Additionally or alternatively, the information related to the PT-RS transmission may include information related to a frequency domain for the PT-RS transmission.

[0414] Additionally or alternatively, the frequency range may include a frequency range in the frequency range above 24250 MHz.

[0415] Additionally or alternatively, the PT-RS transmission can be performed within resources used for a physical sidelink shared channel (PSSCH). Additionally or alternatively, the SL PRS resources for the SL PRS can be configured to not overlap with physical sidelink shared channel (PSSCH) resources.

[0416] Additionally or alternatively, the RSSI (Received Signal Strength Indicator) threshold for CBR (Channel Busy Ratio) measurement for the SL PRS may be related to the RSSI threshold for CBR measurement for the PSSCH (Physical Sidelink Shared Channel).

[0417] Additionally or alternatively, control information is transmitted via a control channel.

[0418] Additionally or alternatively, the control information may include information for identifying SL PRS resources for the SL PRS.

[0419] Additionally or alternatively, the first sidelink control information (SCI) may be transmitted via a physical sidelink control channel (PSCCH).

[0420] Additionally or alternatively, the first SCI may include information regarding reserved SL resources.

[0421] Additionally or alternatively, second SCI (sidelink control information) is transmitted via a PSSCH (physical sidelink shared channel).

[0422] Additionally or alternatively, the second SCI may include index information regarding the reserved SL resources.

[0423] Additionally or alternatively, information relating to the SL resource pool may be obtained.

[0424] Additionally or alternatively, based on the configuration of a PSFCH (physical sidelink feedback channel) resource in the SL resource pool, the period of the PSFCH resource may be related to the period of the SL PRS. The proposed method can be applied to devices according to various embodiments of the present disclosure. First, memory 204 of second device 200 stores instructions that, when executed by processor 202, cause the second device (e.g., processor 202, transceiver 206) to perform an operation. For example, the operations may include at least one of the following steps by the second device (e.g., processor 202, transceiver 206): acquiring information related to phase-tracking reference signal (PT-RS) reception; acquiring information related to sidelink (SL) positioning reference signal (PRS), including at least one of information related to an SL PRS resource identity, information related to an SL PRS comb offset, information related to an SL PRS comb size, information related to an SL PRS starting symbol, or information related to the number of SL PRS symbols; and performing SL PRS reception based on the information related to the SL PRS; however, the PT-RS reception may be canceled within the symbol in which the SL PRS is received.

[0425] In one embodiment, a second device for wireless communication is provided. The first device may include at least one transceiver; at least one processor; and at least one memory executablely connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the second device to perform operations. For example, the operations may include at least one of: acquiring information related to phase-tracking reference signal (PT-RS) reception; acquiring information related to a sidelink (SL) positioning reference signal (PRS), including at least one of information related to an SL PRS resource identity, information related to an SL PRS comb offset, information related to an SL PRS comb size, information related to an SL PRS starting symbol, or information related to a number of SL PRS symbols; and performing SL PRS reception based on the information related to the SL PRS; wherein the PT-RS reception can be canceled within a symbol in which the SL PRS is received.

[0426] 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 executablely connected to the at least one processor and storing instructions that, when executed by the at least one processor, cause the second device to perform operations. For example, the operations may include at least one of: acquiring information related to phase-tracking reference signal (PT-RS) reception; acquiring information related to a sidelink (SL) positioning reference signal (PRS), including at least one of information related to an SL PRS resource identity, information related to an SL PRS comb offset, information related to an SL PRS comb size, information related to an SL PRS starting symbol, or information related to a number of SL PRS symbols; and performing SL PRS reception based on the information related to the SL PRS; wherein the PT-RS reception can be canceled within a symbol in which the SL PRS is received.

[0427] In one embodiment, a non-transitory computer-readable storage medium is proposed having instructions recorded thereon, which, when executed by at least one processor, can cause a second device to perform operations, such as: acquiring information related to phase-tracking reference signal (PT-RS) reception; acquiring information related to sidelink (SL) positioning reference signal (PRS), including at least one of information related to an SL PRS resource identity, information related to an SL PRS comb offset, information related to an SL PRS comb size, information related to an SL PRS starting symbol, or information related to a number of SL PRS symbols; and performing SL PRS reception based on the information related to the SL PRS, wherein the PT-RS reception can be canceled within a symbol in which the SL PRS is received.

[0428] Various embodiments of the present disclosure may be intercombined.

[0429] An apparatus to which various embodiments of the present disclosure are applied will be described below.

[0430] Without being limited thereto, the various descriptions, functions, procedures, suggestions, methods and / or operational flow diagrams disclosed in this document may be applied to various fields requiring wireless communication / connection between devices (e.g., 5G).

[0431] Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. In the following drawings and description, unless otherwise specified, the same reference numerals in the same drawings may represent the same or corresponding hardware blocks, software blocks, or function blocks.

[0432] Figure 21 shows a communication system (1) according to one embodiment of the present disclosure. The embodiment of Figure 21 can be combined with various embodiments of the present disclosure.

[0433] 21, a communication system (1) to which various embodiments of the present disclosure are applied includes wireless devices, base stations, and a network. Here, the wireless devices refer to devices that communicate using wireless connection technologies (e.g., 5G New RAT (NR) or Long Term Evolution (LTE)) and may be referred to as communication / wireless / 5G devices. The wireless devices may include, but are not limited to, a robot 100a, vehicles 100b-1 and 100b-2, an XR (eXtended Reality) device 100c, a handheld device 100d, a home appliance 100e, an IoT (Internet of Things) device 100f, and an AI device / server 400. For example, the vehicles may include vehicles equipped with wireless communication capabilities, autonomous vehicles, vehicles capable of 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., 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 mobile 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. 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 or a network may be implemented as a wireless device, and a specific wireless device 200a may operate as a base station / network node for other wireless devices.

[0434] Here, the wireless communication technology implemented in the wireless devices 100a to 100f in this specification may include not only LTE, NR, and 6G, but also Narrowband Internet of Things (NIT) for low-power communication. Here, for example, NB-IoT technology is an example of Low Power Wide Area Network (LPWAN) technology and may be implemented as standards such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the above-mentioned names. Furthermore, or generally, the wireless communication technology implemented in the wireless devices 100a to 100f in this specification may perform communication based on LTE-M technology. Here, for example, LTE-M technology is an example of LPWAN technology and is referred to by various names such as enhanced Machine Type Communication (eMTC). For example, LTE-M technology may 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-mentioned names. Additionally, or generally, the wireless communication technology implemented in wireless devices 100a-100f herein may include at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN), which are considered low-power communications, but are not limited to the above names. For example, ZigBee technology is based on various standards, such as IEEE 802.15.4, and can create personal area networks (PANs) related to small / low-power digital communications, and is referred to by various names.

[0435] The wireless devices 100a to 100f may be connected to a network 300 via a base station 200. Artificial Intelligence (AI) technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to an AI server 400 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. The wireless devices 100a to 100f may communicate with each other via the base station 200 / network 300, or may communicate directly with each other (e.g., sidelink communication) without going through the base station / network. For example, the vehicles 100b-1 and 100b-2 may communicate directly with each other (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to Everything) communication). Furthermore, an IoT device (for example, a sensor) can directly communicate with another IoT device (for example, a sensor) or another wireless device 100a to 100f.

[0436] Wireless communication / connections 150a, 150b, and 150c can be established between the wireless devices 100a to 100f and the base station 200, and between the base stations 200. Here, the wireless communication / connections may be performed via various wireless connection 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, Integrated Access Backhaul (IAB)). Through the wireless communication / connections 150a, 150b, and 150c, wireless devices and base stations, and base stations, can transmit / receive wireless signals to / from each other. For example, the wireless communication / connections 150a, 150b, and 150c can transmit / receive signals via various physical channels. To this end, based on various proposals of the present disclosure, 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.), resource allocation processes, etc. may be performed.

[0437] 22 illustrates a wireless device according to one embodiment of the present disclosure. The embodiment of FIG. 22 can be combined with various embodiments of the present disclosure.

[0438] 22, a first wireless device 100 and a second wireless device 200 may transmit and receive wireless signals via various wireless access technologies (e.g., LTE, NR), where {first wireless device 100, second wireless device 200} may correspond to {wireless device 100x, base station 200} and / or {wireless device 100x, wireless device 100x} in FIG.

[0439] The first wireless device 100 includes one or more processors 102 and one or more memories 104, and may additionally include one or more transceivers 106 and / or one or more antennas 108. The processor 102 may be configured to control the memory 104 and / or the transceiver 106 to implement the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein. For example, the processor 102 may process information in the memory 104 to generate first information / signal and then transmit a wireless signal including the first information / signal via the transceiver 106. The processor 102 may also 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 coupled to the processor 102 and may store various information related to the operation of the processor 102. For example, the memory 104 may store software code including instructions for executing some or all of the processes controlled by the processor 102 or for implementing the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein. Here, the processor 102 and the memory 104 are part of a communications modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE, NR). The transceiver 106 may be coupled 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 referred to as a radio frequency (RF) unit. In this disclosure, a wireless device may also refer to a communications modem / circuit / chip.

[0440] The second wireless device 200 includes one or more processors 202, one or more memories 204, and may further include one or more transceivers 206 and / or one or more antennas 208. The processor 202 may be configured to control the memory 204 and / or the transceiver 206 to implement the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein. For example, the processor 202 may process information in the memory 204 to generate third information / signal and then transmit a wireless signal including the third information / signal via the transceiver 206. The processor 202 may also receive a wireless signal including fourth information / signal via the transceiver 206 and then store information obtained from signal processing of the fourth information / signal in the memory 204. The memory 204 may be coupled to the processor 202 and may store various information related to the operation of the processor 202. For example, the memory 204 may store software code including instructions for executing some or all of the processes controlled by the processor 202 or for implementing the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein. Here, the processor 202 and the memory 204 are part of a communications modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE, NR). The transceiver 206 may be coupled 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 and may be referred to as an RF unit. In this disclosure, a wireless device may also refer to a communications modem / circuit / chip.

[0441] The hardware elements of the wireless devices 100, 200 will be described in more detail below. Without limitation, 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, and SDAP). The one or more processors 102, 202 may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) in accordance with the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein. The one or more processors 102, 202 may generate messages, control information, data, or information in accordance with the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein. The one or more processors 102, 202 can generate and provide signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information according to the functions, procedures, suggestions, and / or methods disclosed herein to the one or more transceivers 106, 206. The one or more processors 102, 202 can receive signals (e.g., baseband signals) from the one or more transceivers 106, 206 and obtain the PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, suggestions, methods, and / or operational flow diagrams disclosed herein.

[0442] The one or more processors 102, 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer. The one or more processors 102, 202 may be implemented using hardware, firmware, software, or a combination thereof. For example, one or more application-specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field programmable gate arrays (FPGAs) may be included in the one or more processors 102, 202. The descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein 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 operational flowcharts disclosed herein may be implemented using firmware or software configured to be executed by one or more processors 102, 202, or stored in one or more memories 104, 204 and run by one or more processors 102, 202. The descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein may be implemented using firmware or software in the form of code, instructions, and / or collections of instructions.

[0443] One or more memories 104, 204 may be coupled to one or more processors 102, 202 and may store various types of data, signals, messages, information, programs, code, instructions, and / or commands. The one or more memories 104, 204 may comprise 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 internal and / or external to the one or more processors 102, 202. The one or more memories 104, 204 may also be coupled to the one or more processors 102, 202 via various techniques, such as wired or wireless connections.

[0444] One or more transceivers 106, 206 can transmit user data, control information, wireless signals / channels, etc., as referenced in the methods and / or operational flowcharts herein to one or more other devices. One or more transceivers 106, 206 can receive user data, control information, wireless signals / channels, etc., as referenced in the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein from one or more other devices. For example, one or more transceivers 106, 206 can be coupled 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. Also, one or more processors 102, 202 can control one or more transceivers 106, 206 to receive user data, control information, or wireless signals from one or more other devices. Furthermore, one or more transceivers 106, 206 may be coupled to one or more antennas 108, 208 and configured to transmit and receive user data, control information, radio signals / channels, etc., referred to in the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein via one or more antennas 108, 208. In this document, one or more antennas may refer to multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106, 206 may convert received radio signals / channels, etc., from RF band signals to baseband signals for processing using one or more processors 102, 202. One or more transceivers 106, 206 may convert user data, control information, radio signals / channels, etc., processed using one or more processors 102, 202, from baseband signals to RF band signals. To this end, one or more transceivers 106, 206 may include an (analog) oscillator and / or a filter.

[0445] 23 illustrates a signal processing circuit for a transmit signal according to one embodiment of the present disclosure. The embodiment of FIG. 23 can be combined with various embodiments of the present disclosure.

[0446] 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. Without being limited thereto, the operations / functions of FIG. 23 may be executed by the processors 102, 202 and / or the transceivers 106, 206 of FIG. 22. The hardware elements of FIG. 23 may be implemented by the processors 102, 202 and / or the transceivers 106, 206 of FIG. 22. For example, the blocks 1010 to 1060 may be implemented by the processors 102, 202 of FIG. 22. Furthermore, the blocks 1010 to 1050 may be implemented by the processors 102, 202 of FIG. 22, and the block 1060 may be implemented by the transceivers 106, 206 of FIG. 22.

[0447] The codeword can be converted into a radio signal via the signal processing circuit 1000 of FIG. 23. Here, the codeword is an encoded bit sequence of an information block. The information block can include a transmission block (e.g., a UL-SCH transmission block, a DL-SCH transmission block). The radio signal can be transmitted via various physical channels (e.g., a PUSCH, a PDSCH).

[0448] Specifically, the codeword may be converted into a scrambled bit sequence by the scrambler 1010. The scrambling sequence used for scrambling may be generated based on an initialization value, which may include ID information of the wireless device. The scrambled bit sequence may be modulated into a modulation symbol sequence by the modulator 1020. Modulation schemes may include pi / 2-Binary Phase Shift Keying (pi / 2-BPSK), m-Phase Shift Keying (m-PSK), m-Quadrature Amplitude Modulation (m-QAM), etc. The complex modulation symbol sequence may be mapped to one or more transmission layers by the layer mapper 1030. The modulation symbols of each transmission layer may be mapped to corresponding antenna port(s) by the precoder 1040 (precoding). The output z of the precoder 1040 is obtained by multiplying the output y of the layer mapper 1030 by an N*M precoding matrix W. Here, N is the number of antenna ports, and M is the number of transmission layers. Here, the precoder 1040 may perform precoding after performing transform precoding (e.g., DFT) on complex modulation symbols. Alternatively, the precoder 1040 may perform precoding without performing transform precoding.

[0449] The resource mapper 1050 can map modulation symbols for 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 wireless signals from the mapped modulation symbols, and the generated wireless signals can be transmitted to other devices via 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.

[0450] In a wireless device, the signal processing process for a received signal may be configured as the inverse of the signal processing processes 1010 to 1060 in FIG. 23. For example, a wireless device (e.g., 100 or 200 in FIG. 22) may receive a wireless signal from the outside through an antenna port / transceiver. The received wireless signal may be converted to a baseband signal by a signal restorer. To this end, the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a Fast Fourier Transform (FFT) module. Thereafter, the baseband signal may be restored to a codeword through a resource demapper process, a postcoding process, a demodulation process, and a descrambling process. The codeword may be restored to the original information block through decoding. Therefore, a signal processing circuit (not shown) for the received signal may include a signal restorer, a resource demapper, a postcoder, a demodulator, a descrambler, and a decoder.

[0451] 24 illustrates a wireless device according to one embodiment of the present disclosure. The wireless device can be implemented in various forms depending on the use case / service (see FIG. 21). The embodiment of FIG. 24 can be combined with various embodiments of the present disclosure.

[0452] 24, wireless devices 100 and 200 correspond to the wireless devices 100 and 200 of FIG. 22 and may be configured with various elements, components, units, and / or modules. For example, the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and additional elements 140. The communication unit may include a communication circuit 112 and transceiver(s) 114. For example, the communication circuit 112 may include one or more processors 102 and 202 and / or one or more memories 104 and 204 of FIG. 22. For example, the transceiver(s) 114 may include one or more transceivers 106 and 206 and / or one or more antennas 108 and 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 can control the electrical / mechanical operations of the wireless device based on the programs / codes / instructions / information stored in the memory unit 130. In addition, the control unit 120 can transmit information stored in the memory unit 130 to an external device (e.g., another communication device) via the communication unit 110 via a wireless / wired interface, or can store information received from an external device (e.g., another communication device) via the communication unit 110 via a wireless / wired interface in the memory unit 130.

[0453] The additional element 140 may be configured in various ways depending on the type of 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. Without being limited thereto, the wireless device may be embodied in the form of a robot (100a in FIG. 21), a vehicle (100b-1, 100b-2 in FIG. 21), an XR device (100c in FIG. 21), a mobile device (100d in FIG. 21), a home appliance (100e in FIG. 21), an IoT device (100f in FIG. 21), 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 / environment device, an AI server / device (400 in FIG. 21), a base station (200 in FIG. 21), a network node, etc. The wireless device may be mobile or fixed depending on the use case / service.

[0454] 24, various elements, components, units / parts, and / or modules within the wireless devices 100 and 200 may be interconnected entirely via a wired interface, or at least some of them may be connected wirelessly via the communication unit 110. For example, within the wireless devices 100 and 200, the control unit 120 and the communication unit 110 may be connected via a wired interface, and the control unit 120 and a first unit (e.g., 130, 140) may be connected wirelessly via the communication unit 110. Furthermore, each element, component, unit / part, and / or module within the wireless devices 100 and 200 may further include one or more elements. For example, the control unit 120 may be configured as a set of one or more processors. For example, the control unit 120 may be configured as a set of a communication control processor, an application processor, an ECU (Electronic Control Unit), a graphics 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.

[0455] The embodiment of FIG. 24 will now be described in more detail with reference to other drawings.

[0456] FIG. 25 illustrates a mobile device according to one embodiment of the present disclosure. The mobile device may include a smartphone, a smart pad, a wearable device (e.g., a smart watch, smart glasses), or a portable computer (e.g., a laptop). 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.

[0457] 25, portable device 100 may include antenna unit 108, communication unit 110, control unit 120, memory unit 130, power supply unit 140a, interface unit 140b, and input / output unit 140c. Antenna unit 108 may be configured as part of communication unit 110. Blocks 110 to 130 / 140a to 140c correspond to blocks 110 to 130 / 140 in FIG. 24, respectively.

[0458] The communication unit 110 can transmit and receive signals (e.g., data, control signals, etc.) to and from other wireless devices and base stations. The control unit 120 can control the components of the portable device 100 and perform various operations. The control unit 120 can include an AP (Application Processor). The memory unit 130 can store data, parameters, programs, codes, and instructions required to operate the portable device 100. The memory unit 130 can also store input / output data / information. The power supply unit 140a supplies power to the portable device 100 and can include a wired / wireless charging circuit, a battery, etc. The interface unit 140b can support connection between the portable 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 receive and output video information / signals, audio information / signals, data, and / or information input by 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.

[0459] For example, in the case of data communication, the input / output unit 140c may acquire information / signals (e.g., touch, text, voice, image, video) input by a user, and the acquired information / signals may be stored in the memory unit 130. The communication unit 110 may convert the information / signals stored in the memory into wireless signals and transmit the converted wireless signals directly to another wireless device or to a base station. The communication unit 110 may also receive wireless signals from another wireless device or a base station and restore the received wireless signals to the original information / signals. The restored information / signals may be stored in the memory unit 130 and then output in various forms (e.g., text, voice, image, video, haptic) via the input / output unit 140c.

[0460] 26 illustrates a vehicle or an autonomous vehicle according to one embodiment of the present disclosure. The vehicle or autonomous vehicle may be a mobile robot, a car, a train, an aerial vehicle (AV), a ship, etc. The embodiment of FIG. 26 may be combined with various embodiments of the present disclosure.

[0461] 26, a vehicle or autonomous vehicle 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a drive unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 may be configured as part of the communication unit 110. Blocks 110 / 130 / 140a to 140d correspond to blocks 110 / 130 / 140 in FIG. 24, respectively.

[0462] The communication unit 110 can transmit and receive signals (e.g., data, control signals, etc.) to and from external devices such as other vehicles, base stations (e.g., base stations, roadside units, etc.), and servers. The control unit 120 can control elements of the vehicle or autonomous vehicle 100 and perform various operations. The control unit 120 can include an ECU (Electronic Control Unit). The driving unit 140a can cause the vehicle or autonomous vehicle 100 to travel on the ground. The driving unit 140a can include an engine, a motor, a powertrain, 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 inclination sensor, a weight detection sensor, a heading sensor, a position module, a vehicle forward / reverse sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illuminance sensor, a pedal position sensor, etc. The autonomous driving unit 140d may implement a technology for maintaining a lane while driving, a technology for automatically adjusting speed like adaptive cruise control, a technology for automatically driving along a predetermined route, a technology for automatically setting a route and driving when a destination is set, etc.

[0463] For example, the communication unit 110 may receive map data, traffic information data, etc. from an external server. The autonomous driving unit 140d may generate an autonomous driving route and a driving plan based on the acquired data. The control unit 120 may control the driving unit 140a (e.g., adjusting speed / direction) so that the vehicle or autonomous vehicle 100 moves along the autonomous driving route according to the driving plan. During autonomous driving, the communication unit 110 may non-periodically acquire the latest traffic information data from an external server and acquire surrounding traffic information data from surrounding vehicles. Also, during autonomous driving, the sensor unit 140c may acquire vehicle status and surrounding environment information. The autonomous driving unit 140d may update the autonomous driving route and the driving plan based on the newly acquired data / information. The communication unit 110 may transmit information regarding the vehicle position, autonomous driving route, driving plan, etc. to an external server. The external server may predict traffic information data in advance using AI technology based on information collected from the vehicle or autonomous vehicle and provide the predicted traffic information data to the vehicle or autonomous vehicle.

[0464] The claims described herein may be combined in various ways. For example, technical features of method claims herein may be combined and embodied in an apparatus, and technical features of apparatus claims herein may be combined and embodied in a method. Furthermore, technical features of method claims herein and technical features of apparatus claims herein may be combined and embodied in an apparatus, and technical features of method claims herein and technical features of apparatus claims herein may be combined and embodied in a method.

[0465] [Claims at the time of international application] [Document title] Scope of claims [Claim 1] 1. A method for wireless communication by a first device, comprising: acquiring information related to a phase-tracking reference signal (PT-RS) transmission; Obtaining information related to a sidelink (SL) PRS (positioning reference signal), including at least one of information related to a sidelink (SL) PRS resource identity, information related to a SL PRS comb offset, information related to a SL PRS comb size, information related to a SL PRS starting symbol, or information related to a number of SL PRS symbols; and performing a SL PRS transmission based on the information related to the SL PRS; The method, wherein the PT-RS transmission is cancelled within a symbol in which the SL PRS is transmitted. [Claim 2] The method of claim 1 , wherein the PT-RS transmission is canceled based on the SL PRS transmission and the PT-RS transmission overlapping within the symbol in which the SL PRS is transmitted. [Claim 3] obtaining information related to a SL resource pool; and The method of claim 1 , wherein the PT-RS transmission is canceled (i) within the SL resource pool and (ii) within a symbol in which the SL PRS is transmitted. [Claim 4] The method of claim 3 , wherein the SL resource pool includes a shared resource pool usable for both the SL PRS transmission and a physical sidelink shared channel (PSSCH) transmission. [Claim 5] obtaining information related to a SL resource pool; and 2. The method of claim 1, wherein the PT-RS transmission is canceled based on (i) the SL PRS transmission being performed within an SL PRS resource in the SL resource pool, and (ii) the PT-RS transmission being performed within the SL PRS resource in the SL resource pool. [Claim 6] The method of claim 1 , wherein the PT-RS transmission is canceled (i) within the symbol in which the SL PRS is transmitted, and (ii) within the frequency domain in which the SL PRS is transmitted. [Claim 7] the information related to the PT-RS transmission includes information related to a frequency domain for the PT-RS transmission; The method of claim 1 , wherein the frequency range includes a frequency range in the frequency range above 24250 MHz. [Claim 8] The method of claim 1 , wherein the PT-RS transmission is performed within resources used for a physical sidelink shared channel (PSSCH). [Claim 9] The method of claim 1 , wherein SL PRS resources for the SL PRS are configured to not overlap with physical sidelink shared channel (PSSCH) resources. [Claim 10] The method of claim 1 , wherein a received signal strength indicator (RSSI) threshold for a channel busy ratio (CBR) measurement for the SL PRS is related to an RSSI threshold for a physical sidelink shared channel (PSSCH) CBR measurement. [Claim 11] transmitting control information over a control channel; The method of claim 1 , wherein the control information includes information for identifying a SL PRS resource for the SL PRS. [Claim 12] transmitting first sidelink control information (SCI) via a physical sidelink control channel (PSCCH); The first SCI includes information about reserved SL resources; transmitting second sidelink control information (SCI) via a physical sidelink shared channel (PSSCH); The method of claim 1 , wherein the second SCI includes index information regarding the reserved SL resource. [Claim 13] obtaining information related to a SL resource pool; and The method of claim 1 , wherein a periodicity of a physical sidelink feedback channel (PSFCH) resource is related to a periodicity of the SL PRS based on a configuration of a PSFCH resource in the SL resource pool. [Claim 14] a first device for wireless communication, at least one transceiver; at least one processor; and at least one memory executablely coupled to the at least one processor and storing instructions that, when executed by the at least one processor, cause the first device to perform an action; The operation is acquiring information related to a phase-tracking reference signal (PT-RS) transmission; Obtaining information related to a sidelink (SL) PRS (positioning reference signal), including at least one of information related to a sidelink (SL) PRS resource identity, information related to a SL PRS comb offset, information related to a SL PRS comb size, information related to a SL PRS starting symbol, or information related to a number of SL PRS symbols; and performing a SL PRS transmission based on the information related to the SL PRS; The first device, wherein the PT-RS transmission is canceled within a symbol in which the SL PRS is transmitted. [Claim 15] a processing device adapted to control the first device, at least one processor; and at least one memory executablely coupled to the at least one processor and storing instructions that, when executed by the at least one processor, cause the first device to perform an action; The operation is acquiring information related to a phase-tracking reference signal (PT-RS) transmission; Obtaining information related to a sidelink (SL) PRS (positioning reference signal), including at least one of information related to a sidelink (SL) PRS resource identity, information related to a SL PRS comb offset, information related to a SL PRS comb size, information related to a SL PRS starting symbol, or information related to a number of SL PRS symbols; and performing a SL PRS transmission based on the information related to the SL PRS; The processing device, wherein the PT-RS transmission is cancelled within the symbol in which the SL PRS is transmitted. [Claim 16] A non-transitory computer-readable storage medium having instructions recorded thereon, The instructions, when executed, cause the first device to perform an action; The operation is acquiring information related to a phase-tracking reference signal (PT-RS) transmission; Obtaining information related to a sidelink (SL) PRS (positioning reference signal), including at least one of information related to a sidelink (SL) PRS resource identity, information related to a SL PRS comb offset, information related to a SL PRS comb size, information related to a SL PRS starting symbol, or information related to a number of SL PRS symbols; and performing a SL PRS transmission based on the information related to the SL PRS; The non-transitory computer-readable storage medium, wherein the PT-RS transmission is canceled within a symbol in which the SL PRS is transmitted. [Claim 17] 1. A method for wireless communication by a second device, comprising: acquiring information related to phase-tracking reference signal (PT-RS) reception; Obtaining information related to a sidelink (SL) PRS (positioning reference signal), including at least one of information related to a sidelink (SL) PRS resource identity, information related to a SL PRS comb offset, information related to a SL PRS comb size, information related to a SL PRS starting symbol, or information related to a number of SL PRS symbols; and performing SL PRS reception based on the information related to the SL PRS; The method, wherein within a symbol in which the SL PRS is received, the PT-RS reception is cancelled. [Claim 18] a second device for wireless communication, at least one transceiver; at least one processor; and at least one memory executablely coupled to the at least one processor and storing instructions that, when executed by the at least one processor, cause the second device to perform an action; The operation is acquiring information related to phase-tracking reference signal (PT-RS) reception; Obtaining information related to a sidelink (SL) PRS (positioning reference signal), including at least one of information related to a sidelink (SL) PRS resource identity, information related to a SL PRS comb offset, information related to a SL PRS comb size, information related to a SL PRS starting symbol, or information related to a number of SL PRS symbols; and performing SL PRS reception based on the information related to the SL PRS; A second device, wherein the PT-RS reception is cancelled within a symbol in which the SL PRS is received. [Claim 19] an apparatus adapted to control a second device, at least one processor; and at least one memory executablely coupled to the at least one processor and storing instructions that, when executed by the at least one processor, cause the second device to perform an action; The operation is acquiring information related to phase-tracking reference signal (PT-RS) reception; Obtaining information related to a sidelink (SL) PRS (positioning reference signal), including at least one of information related to a sidelink (SL) PRS resource identity, information related to a SL PRS comb offset, information related to a SL PRS comb size, information related to a SL PRS starting symbol, or information related to a number of SL PRS symbols; and performing SL PRS reception based on the information related to the SL PRS; The processing device cancels the PT-RS reception within the symbol in which the SL PRS is received. [Claim 20] A non-transitory computer-readable storage medium having instructions recorded thereon, The instructions, when executed, cause a second device to perform an action; The operation is acquiring information related to phase-tracking reference signal (PT-RS) reception; Obtaining information related to a sidelink (SL) PRS (positioning reference signal), including at least one of information related to a sidelink (SL) PRS resource identity, information related to a SL PRS comb offset, information related to a SL PRS comb size, information related to a SL PRS starting symbol, or information related to a number of SL PRS symbols; and performing SL PRS reception based on the information related to the SL PRS; The non-transitory computer-readable storage medium, wherein within a symbol in which the SL PRS is received, the PT-RS reception is canceled.

Claims

1. 1. A method for wireless communication by a first device, comprising: obtaining information related to a phase-tracking reference signal (PT-RS) transmission; acquiring information related to a sidelink (SL) PRS (positioning reference signal), including at least one of information related to a sidelink (SL) PRS resource identity, information related to a SL PRS comb offset, information related to a SL PRS comb size, information related to a starting symbol of the SL PRS, and information related to the number of SL PRS symbols; and performing a SL PRS transmission based on the information related to the SL PRS; The method, wherein the PT-RS transmission is cancelled within a symbol in which the SL PRS is transmitted.

2. The method of claim 1 , wherein the PT-RS transmission is canceled based on the SL PRS transmission and the PT-RS transmission overlapping within the symbol in which the SL PRS is transmitted.

3. obtaining information related to an SL resource pool; and The method of claim 1 , wherein the PT-RS transmission is canceled (i) in the SL resource pool and (ii) in symbols in which the SL PRS is transmitted.

4. The method of claim 3 , wherein the SL resource pool includes a shared resource pool usable for both the SL PRS transmission and a physical sidelink shared channel (PSSCH) transmission.

5. obtaining information related to an SL resource pool; and 2. The method of claim 1, wherein the PT-RS transmission is canceled based on (i) the SL PRS transmission being performed within an SL PRS resource in the SL resource pool, and (ii) the PT-RS transmission being performed within the SL PRS resource in the SL resource pool.

6. The method of claim 1, wherein the PT-RS transmission is canceled (i) within a symbol in which the SL PRS is transmitted, and (ii) within a frequency domain in which the SL PRS is transmitted.

7. the information related to the PT-RS transmission includes information related to a frequency domain for the PT-RS transmission; The method of claim 1 , wherein the frequency range includes a frequency range within a frequency range of 24250 MHz or greater.

8. The method of claim 1 , wherein the PT-RS transmission is performed within resources used for a physical sidelink shared channel (PSSCH).

9. The method of claim 1 , wherein SL PRS resources for the SL PRS are configured not to overlap with physical sidelink shared channel (PSSCH) resources.

10. 2. The method of claim 1, wherein a received signal strength indicator (RSSI) threshold for a channel busy ratio (CBR) measurement for the SL PRS is related to an RSSI threshold for a physical sidelink shared channel (PSSCH).

11. transmitting control information via a control channel; The method of claim 1 , wherein the control information includes information for identifying SL PRS resources for the SL PRS.

12. transmitting first sidelink control information (SCI) via a physical sidelink control channel (PSCCH); The first SCI includes information about reserved SL resources; transmitting second sidelink control information (SCI) via a physical sidelink shared channel (PSSCH); The method of claim 1 , wherein the second SCI includes index information regarding the reserved SL resources.

13. obtaining information related to an SL resource pool; and The method of claim 1 , wherein a periodicity of a physical sidelink feedback channel (PSFCH) resource is related to a periodicity of the SL PRS based on a configuration of a PSFCH resource in the SL resource pool.

14. a first device for wireless communication, at least one transceiver; at least one processor; and at least one memory executablely coupled to the at least one processor and storing instructions that, when executed by the at least one processor, cause the first device to perform an action; The operation is obtaining information related to a phase-tracking reference signal (PT-RS) transmission; acquiring information related to a sidelink (SL) PRS (positioning reference signal), including at least one of information related to a sidelink (SL) PRS resource identity, information related to a SL PRS comb offset, information related to a SL PRS comb size, information related to a starting symbol of the SL PRS, and information related to the number of SL PRS symbols; and performing a SL PRS transmission based on the information related to the SL PRS; The first device, wherein the PT-RS transmission is cancelled within a symbol in which the SL PRS is transmitted.

15. a processing device adapted to control a first device, at least one processor; and at least one memory executablely coupled to the at least one processor and storing instructions that, when executed by the at least one processor, cause the first device to perform an action; The operation is obtaining information related to a phase-tracking reference signal (PT-RS) transmission; acquiring information related to a sidelink (SL) PRS (positioning reference signal), including at least one of information related to a sidelink (SL) PRS resource identity, information related to a SL PRS comb offset, information related to a SL PRS comb size, information related to a starting symbol of the SL PRS, and information related to the number of SL PRS symbols; and performing a SL PRS transmission based on the information related to the SL PRS; The processing device, wherein the PT-RS transmission is cancelled within a symbol in which the SL PRS is transmitted.

16. A non-transitory computer-readable storage medium having instructions recorded thereon, The instructions, when executed, cause the first device to perform an action; The operation is obtaining information related to a phase-tracking reference signal (PT-RS) transmission; acquiring information related to a sidelink (SL) PRS (positioning reference signal), including at least one of information related to a sidelink (SL) PRS resource identity, information related to a SL PRS comb offset, information related to a SL PRS comb size, information related to a starting symbol of the SL PRS, and information related to the number of SL PRS symbols; and performing a SL PRS transmission based on the information related to the SL PRS; The non-transitory computer-readable storage medium, wherein the PT-RS transmission is canceled within a symbol in which the SL PRS is transmitted.

17. 1. A method for wireless communication by a second device, comprising: acquiring information related to phase-tracking reference signal (PT-RS) reception; acquiring information related to a sidelink (SL) PRS (positioning reference signal), including at least one of information related to a sidelink (SL) PRS resource identity, information related to a SL PRS comb offset, information related to a SL PRS comb size, information related to a starting symbol of the SL PRS, and information related to the number of SL PRS symbols; and performing SL PRS reception based on the information related to the SL PRS; The method, wherein within a symbol in which the SL PRS is received, the PT-RS reception is cancelled.

18. a second device for wireless communication, at least one transceiver; at least one processor; and at least one memory executablely coupled to the at least one processor and storing instructions that, when executed by the at least one processor, cause the second device to perform an action; The operation is acquiring information related to phase-tracking reference signal (PT-RS) reception; acquiring information related to a sidelink (SL) PRS (positioning reference signal), including at least one of information related to a sidelink (SL) PRS resource identity, information related to a SL PRS comb offset, information related to a SL PRS comb size, information related to a starting symbol of the SL PRS, and information related to the number of SL PRS symbols; and performing SL PRS reception based on the information related to the SL PRS; A second device, wherein the PT-RS reception is cancelled within a symbol in which the SL PRS is received.

19. an apparatus adapted to control a second device, at least one processor; and at least one memory executablely coupled to the at least one processor and storing instructions that, when executed by the at least one processor, cause the second device to perform an action; The operation is acquiring information related to phase-tracking reference signal (PT-RS) reception; acquiring information related to a sidelink (SL) PRS (positioning reference signal), including at least one of information related to a sidelink (SL) PRS resource identity, information related to a SL PRS comb offset, information related to a SL PRS comb size, information related to a starting symbol of the SL PRS, and information related to the number of SL PRS symbols; and performing SL PRS reception based on the information related to the SL PRS; The processing device, wherein the PT-RS reception is cancelled within a symbol in which the SL PRS is received.

20. A non-transitory computer-readable storage medium having instructions recorded thereon, The instructions, when executed, cause a second device to perform an action; The operation is acquiring information related to phase-tracking reference signal (PT-RS) reception; acquiring information related to a sidelink (SL) PRS (positioning reference signal), including at least one of information related to a sidelink (SL) PRS resource identity, information related to a SL PRS comb offset, information related to a SL PRS comb size, information related to a starting symbol of the SL PRS, and information related to the number of SL PRS symbols; and performing SL PRS reception based on the information related to the SL PRS; The non-transitory computer-readable storage medium, wherein the PT-RS reception is canceled within a symbol in which the SL PRS is received.

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