Method and apparatus for performing wireless communication related to positioning

Abstract

A method by which a first device performs wireless communication and a device supporting the same are provided. For example, a first device may acquire information related to PT-RS transmission. For example, a first device may acquire information related to an SL PRS, the information 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 may perform SL PRS transmission based on information related to the SL PRS. For example, within the symbol where the SL PRS is transmitted, PT-RS transmission may be cancelled.

Description

Technical Field

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

[0002] 5G NR is the successor technology to LTE-A, a new, all-new mobile communication system with high performance, low latency, and high availability. 5G NR can use all spectrum resources available for use cases, including low-frequency bands below 1 GHz, intermediate frequency bands from 1 GHz to 10 GHz, and high-frequency bands (millimeter waves) of 24 GHz or higher.

[0003] The 6G (wireless communication) system has objectives such as (i) very high data rates per device, (ii) a very large number of connected devices, (iii) global connectivity, (iv) very low latency, (v) reduced energy consumption of battery-free Internet of Things (IoT) devices, (vi) ultra-reliable connectivity, and (vii) networked intelligence with machine learning capabilities. The vision of the 6G system may include four aspects such as intelligent connectivity, deep connectivity, holographic connectivity, and ubiquitous connectivity, and the 6G system may meet the requirements shown in Table 1 below. For example, Table 1 shows the requirements of the 6G system.

[0004] [Table 1]

[0005] Peak data rate per device 1Tbps E2E latency 1ms Maximum spectral efficiency 100bps / Hz Mobility support Up to 1000km / hr Satellite Integration completely AI completely autonomous vehicles completely XR completely Tactile communication completely Summary of the Invention

[0006] Technical Solution

[0007] In one embodiment, a method for performing wireless communication by a first device is provided. For example, the first device may obtain information related to the transmission of a phase tracking reference signal (PT-RS). For example, the first device may obtain information related to a sidelink (SL) positioning reference signal (PRS), and the information related to the SL PRS includes at least one of information related to an SL PRS resource identifier (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 may perform SL PRS transmission based on the information related to the SL PRS. For example, PT-RS transmission is canceled in a symbol in which the SL PRS is transmitted. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A communication structure that can be provided in a 6G system based on an embodiment of the present disclosure is shown.

[0009] Figure 2 The electromagnetic spectrum according to an embodiment of the present disclosure is shown.

[0010] Figure 3 An example of a typical NTN scenario based on transparent payload according to an embodiment of the present disclosure is shown.

[0011] Figure 4 An example of a typical NTN scenario based on regenerated payload according to an embodiment of the present disclosure is shown.

[0012] Figure 5 An example of a sensing operation according to an embodiment of the present disclosure is shown.

[0013] Figure 6 The structure of a time slot of a frame according to an embodiment of the present disclosure is shown.

[0014] Figure 7 An example of a BWP according to an embodiment of the present disclosure is shown.

[0015] Figure 8 A process of performing V2X or SL communication by a UE based on a resource allocation pattern according to an embodiment of the present disclosure is shown.

[0016] Figure 9 Three broadcast types based on embodiments of the present disclosure are shown.

[0017] Figure 10 FIG. 4 shows a synchronization source or synchronization reference of V2X based on an embodiment of the present disclosure.

[0018] Figure 11 An example of the architecture of a 5G system capable of locating a UE that has access rights to a next-generation radio access network (NG-RAN) or E-UTRAN based on an embodiment of the present disclosure is shown.

[0019] Figure 12 An example of implementing a network for measuring the location of a UE based on an embodiment of the present disclosure is shown.

[0020] Figure 13 An example of protocol layers used to support LTE Positioning Protocol (LPP) message transmission between an LMF and a UE according to an embodiment of the present disclosure is shown.

[0021] Figure 14 An example of protocol layers used to support NR Positioning Protocol A (NRPPa) PDU transmission between LMF and NG-RAN nodes based on an embodiment of the present disclosure is shown.

[0022] Figure 15 It is a diagram for explaining the OTDOA positioning method according to an embodiment of the present disclosure.

[0023] Figure 16FIG. 1 is a diagram for explaining a bilateral RTT positioning method according to an embodiment of the present disclosure.

[0024] Figure 17 1 is a diagram for explaining a problem in a method of performing wireless communication related to positioning according to an embodiment of the present disclosure.

[0025] Figure 18 FIG. 1 is a diagram for explaining a process of performing wireless communication related to positioning according to an embodiment of the present disclosure.

[0026] Figure 19 A method for performing wireless communication by a first device according to an embodiment of the present disclosure is shown.

[0027] Figure 20 A method for performing wireless communication by a second device according to an embodiment of the present disclosure is shown.

[0028] Figure 21 A communication system 1 according to an embodiment of the present disclosure is shown.

[0029] Figure 22 A wireless device according to an embodiment of the present disclosure is shown.

[0030] Figure 23 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown.

[0031] Figure 24 Another example of a wireless device according to an embodiment of the present disclosure is shown.

[0032] Figure 25 A handheld device according to an embodiment of the present disclosure is shown.

[0033] Figure 26 A vehicle or autonomous vehicle according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0034] In the present disclosure, "A or B" may mean "only A", "only B", or "both A and B". In other words, in the present disclosure, "A or B" may be interpreted as "A and / or B". For example, in the present disclosure, "A, B or C" may mean "only A", "only B", "only C", or "any combination of A, B, and C".

[0035] As used in this disclosure, a slash ( / ) or a comma may mean "and / or." For example, "A / B" may mean "A and / or B." Thus, "A / B" may mean "only A," "only B," or "both A and B." For example, "A, B, C" may mean "A, B, or C."

[0036] In the present disclosure, “at least one of A and B” may mean “only A”, “only B”, or “both A and B”. In addition, in the present disclosure, the expression “at least one of A or B” or “at least one of A and / or B” may be interpreted as “at least one of A and B”.

[0037] In addition, in the present disclosure, “at least one of A, B, and C” may mean “only A,” “only B,” “only C,” or “any combination of A, B, and C.” In addition, “at least one of A, B, or C” or “at least one of A, B, and / or C” may mean “at least one of A, B, and C.”

[0038] In addition, the brackets used in the present disclosure may mean "for example". Specifically, when it is indicated as "control information (PDCCH)", this may mean that "PDCCH" is proposed as an example of "control information". In other words, the "control information" of the present disclosure is not limited to "PDCCH", and "PDDCH" may be proposed as an example of "control information". Specifically, when it is indicated as "control information (i.e., PDCCH)", this may also mean that "PDCCH" is proposed as an example of "control information".

[0039] In the following description, “when, if, or in the event of” may be replaced with “based on”.

[0040] The technical features respectively described in one drawing in the present disclosure may be implemented separately or may be implemented simultaneously.

[0041] In the present disclosure, a high-layer parameter may be a parameter configured, preconfigured, or predefined for a UE. For example, a base station or a network may send the high-layer parameter to the UE. For example, the high-layer parameter may be sent via radio resource control (RRC) signaling or medium access control (MAC) signaling.

[0042] In the present disclosure, “configured or defined” may be interpreted as being configured or pre-configured for a device by predefined signaling (e.g., SIB, MAC, RRC) from a base station or network. In the present disclosure, “configured or defined” may be interpreted as being pre-configured for a device.

[0043] The techniques proposed in this disclosure can be used in various wireless communication systems such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. CDMA can be implemented using radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA-2000. TDMA can be implemented using radio technologies such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA can be implemented using radio technologies such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Evolved UTRA (E-UTRA), Long Term Evolution (LTE), 5G NR, etc.

[0044] The technology proposed in this disclosure can be implemented as 6G wireless technology and can be applied to various 6G systems. For example, 6G systems can have key factors such as enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC), massive machine type communication (mMTC), AI-integrated communication, tactile Internet, high throughput, high network capacity, and high energy efficiency.

[0045] Figure 1 The following illustrates a communication structure that may be provided in a 6G system according to an embodiment of the present disclosure. Figure 1 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0046] New network features in 6G may include:

[0047] -Satellite integrated network

[0048] -Connected Intelligence: Unlike previous generations of wireless communication systems, 6G is revolutionary and will update wireless evolution from "connected things" to "connected intelligence." AI can be applied in every step of the communication process (or every signal processing process described below).

[0049] -Seamless integration of wireless information and energy transfer.

[0050] -Ubiquitous and Beyond 3D Connectivity: Access to networks and core network functions from drones and very low Earth orbit satellites will establish beyond 3D connectivity in 6G ubiquity.

[0051] Among the above new network features of 6G, some general requirements are as follows.

[0052] -Small cell network

[0053] -Ultra-dense heterogeneous network

[0054] - High capacity backhaul

[0055] - Radar technology integrated with mobile technology: High-precision positioning (or location-based services) through communication is one of the functions of 6G wireless communication systems. Therefore, radar systems will be integrated with 6G networks.

[0056] -Software and virtualization.

[0057] The following describes the core implementation technologies of the 6G system.

[0058] Artificial Intelligence: The introduction of AI in telecommunications can simplify and improve real-time data transmission. AI can use numerous analyses to determine how to execute complex, targeted tasks, improving efficiency and reducing processing latency. Time-consuming tasks such as handover, network selection, and resource scheduling can be completed instantly using AI. AI can also play a significant role in machine-to-machine (M2M), machine-to-human, and human-to-machine communications. Furthermore, AI can enable fast communication in brain-computer interfaces (BCIs). AI-based communication systems can be supported by metamaterials, smart structures, smart networks, smart devices, intelligent cognitive radios, self-sustaining wireless networks, and machine learning.

[0059] -THz communication (terahertz communication): Data rates can be increased by increasing bandwidth. This can be achieved by using wide-bandwidth sub-THz communication and applying advanced massive MIMO techniques. THz waves (also known as sub-millimeter radiation) refer to the frequency band between 0.1 THz and 10 THz, with corresponding wavelengths typically ranging from 0.03 mm to 3 mm. The 100 GHz-300 GHz frequency band (sub-THz band) is considered the primary portion of the THz band used for cellular communications. Adding the sub-THz band to the millimeter wave band increases the capacity of 6G cellular communications. The defined THz band of 300 GHz to 3 THz lies in the far infrared (IR) band. The 300 GHz-3 THz band is part of the optical band, but it is on the boundary of the optical band, just behind the RF band. Therefore, the 300 GHz-3 THz band exhibits similarities to RF. Figure 2 The electromagnetic spectrum according to one embodiment of the present disclosure is illustrated. Figure 2 The embodiments of the present disclosure can be combined with various embodiments of the present disclosure. Key features of THz communication include (i) widely available bandwidth that supports very high data rates, and (ii) high path loss at high frequencies (for which highly directional antennas are indispensable). The narrow beamwidth produced by highly directional antennas reduces interference. The small wavelength of THz signals allows a larger number of antenna elements to be integrated into devices and BSs operating in this frequency band. This enables the use of advanced adaptive array techniques that can overcome range limitations.

[0060] - Massive MIMO technology (Massive MIMO)

[0061] -Holographic Beamforming (HBF, Holographic Beamforming)

[0062] -Optical wireless technology

[0063] -Free Space Optical Backhaul Network (FSO Backhaul Network)

[0064] -Quantum communication

[0065] - No cellular communication

[0066] -Integration of wireless information and power transmission

[0067] -Integration of wireless communication and sensing

[0068] -Integrated access and backhaul network

[0069] -Big data analysis

[0070] -Reconfigurable smart surface

[0071] -Metaverse

[0072] -Blockchain

[0073] - Unmanned Aerial Vehicles (UAVs): UAVs, or drones, will be a crucial component of 6G wireless communications. In most scenarios, UAV technology can be used to provide high-speed data wireless connectivity. Base stations (BSs) can be physically mounted on UAVs to provide cellular connectivity. UAVs may possess specific features not found in fixed BS infrastructure (e.g., easy deployment, strong line-of-sight links, and controlled mobility). During emergencies such as natural disasters, the deployment of terrestrial telecommunication infrastructure is economically unfeasible and sometimes unable to provide services in volatile environments. UAVs can easily handle these situations. UAVs will be a new paradigm in wireless communications. This technology contributes to the three fundamental requirements of wireless networks: eMBB, URLLC, and mMTC. UAVs can also support many other purposes such as enhanced network connectivity, fire detection, disaster emergency services, security and surveillance, pollution monitoring, parking monitoring, accident detection, and more. Therefore, UAV technology is considered one of the most important technologies for 6G communications.

[0074] - Advanced Air Mobility (AAM): AAM is the parent concept of Urban Air Mobility (UAM), which is an aerial vehicle that can be used in urban centers and can refer to a vehicle that includes movement between urban centers and regional bases.

[0075] -Autonomous driving (self-driving): Vehicle-to-everything (V2X), a key element in building autonomous driving infrastructure, can be a technology that enables vehicles to communicate with various elements on the road and share information (such as vehicle-to-vehicle (V2V) wireless communication and vehicle-to-infrastructure (V2I) wireless communication) in order to perform autonomous driving. In order to maximize the performance of autonomous driving and ensure high safety, fast transmission speeds and low-latency technologies are necessary. In addition, in the future, autonomous driving may need to go beyond delivering warning or guidance messages to the driver and actively intervene in vehicle operations, requiring direct control of the vehicle in dangerous situations. To do this, the amount of information that needs to be sent and received may be large, so 6G is expected to maximize autonomous driving with faster transmission speeds and lower latency than 5G.

[0076] - Non-terrestrial network (NTN): NTN may refer to a network or network segment that uses radio frequency (RF) resources mounted on a satellite (or unmanned aerial system (UAS) platform). Figure 3 An example of a typical NTN scenario based on transparent payload according to an embodiment of the present disclosure is shown. Figure 4 An example of a typical NTN scenario based on regeneration payload according to an embodiment of the present disclosure is shown. Figure 3 or Figure 4 The embodiments of can be combined with various embodiments of the present disclosure. Figure 3 , a satellite (or UAS platform) can establish a service link with a UE. A satellite (or UAS platform) can be connected to a gateway via a feeder link. A satellite can be connected to a data network via a gateway. Beam coverage can refer to an area where a signal transmitted by a satellite can be received. Figure 4 , a satellite (or UAS platform) can create a service link with the UE. A satellite (or UAS platform) connected to the UE can be connected to other satellites (or UAS platforms) via an inter-satellite link (ISL). Other satellites (or UAS platforms) can be connected to the gateway via a feeder link. Based on the regenerative payload, the satellite can be connected to the data network via other satellites and the gateway. If there is no ISL between the satellite and another satellite, a feeder link between the satellite and the gateway may be required. Figure 3 and Figure 4This is merely an example of an NTN scenario, and NTN can be implemented based on various types of scenarios. For example, a satellite (or UAS platform) can implement a transparent or regenerative (with onboard processing) payload. For example, a satellite (or UAS platform) can generate multiple beams over a specified service area based on the field of view of the satellite (or UAS platform). For example, the field of view of a satellite (or UAS platform) can be different based on the onboard antenna diagram and the minimum elevation angle. For example, a transparent payload can include RF filtering, frequency conversion, and amplification. Therefore, the waveform signal repeated by the payload may not be changed. For example, a regenerative payload can include RF filtering, frequency conversion and amplification, demodulation / decryption, switching and / or routing, and coding / modulation. For example, a regenerative payload can be essentially equivalent to equipping a satellite (or UAS platform) with all or part of the base station functionality.

[0077] Integrated Sensing and Communications (ISAC): Wireless sensing is a technology that uses radio frequency to determine the instantaneous linear velocity, angle, and distance (range) of an object to obtain information about the environment and / or the characteristics of objects within it. Because RF sensing functionality does not require a device connected to the object in the network, it can provide services for determining the location of an object without a device. The ability to obtain range, velocity, and angle information from RF signals can provide a wide range of new capabilities, such as detection of various objects, object identification (e.g., vehicles, people, 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 control and navigation, trajectory tracking, collision avoidance, traffic management, and health and traffic management. In some cases, wireless sensing can use non-3GPP sensors (e.g., radar, cameras) to further support 3GPP-based sensing. For example, the operation of wireless sensing services (i.e., sensing operations) can depend on the processing of transmission, reflection, and scattering of wireless sensing signals. Therefore, wireless sensing can provide an opportunity to enhance existing communication systems from communication networks to wireless communication and sensing networks. Figure 5 An example of a sensing operation according to an embodiment of the present disclosure is shown. Figure 5 The embodiments of can be combined with various embodiments of the present disclosure. Specifically, Figure 5 (a) illustrates an example of sensing using a sensing receiver and a sensing transmitter at the same location (eg, single-station sensing), and Figure 5 (b) illustrates an example of sensing using separate sensing receivers and sensing transmitters (eg, bistatic sensing).

[0078] The radio interface protocol layers between the UE and the network can be categorized as Layer 1 (L1), Layer 2 (L2), and Layer 3 (L3) based on the lower three layers of the Open Systems Interconnection (OSI) model, which is well known in communication systems. The physical (PHY) layer, belonging to Layer 1, provides information transmission services using physical channels, and the radio resource control (RRC) layer, located at Layer 3, controls radio resources between the UE and the network. To this end, the RRC layer exchanges RRC messages between the UE and the base station layer.

[0079] The physical layer provides information transfer services to upper layers via physical channels. The physical layer is connected to the media access control (MAC) layer, its upper layer, via transport channels. Data is transferred between the MAC and physical layers via transport channels. Transport channels are categorized based on how data is transmitted over the radio interface and the characteristics of the data being transmitted.

[0080] Data is transmitted between different physical layers (ie, a PHY layer of a transmitter and a PHY layer of a receiver) through a physical channel. The physical channel may be modulated using an Orthogonal Frequency Division Multiplexing (OFDM) scheme and uses time and frequency as radio resources.

[0081] The MAC layer provides services to the Radio Link Control (RLC) layer, a higher layer above the MAC layer, via logical channels. The MAC layer maps multiple logical channels to multiple transport channels. The MAC layer also provides logical channel multiplexing by mapping multiple logical channels to a single transport channel. The MAC layer provides data transmission services via logical channels.

[0082] The RLC layer performs concatenation, segmentation, and reassembly of radio link control service data units (RLC SDUs). To ensure the different quality of service (QoS) required for radio bearers (RBs), the RLC layer provides three types of operation modes: transparent mode (TM), unacknowledged mode (UM), and acknowledged mode (AM). AM RLC provides error correction through automatic repeat request (ARQ).

[0083] The Radio Resource Control (RRC) layer is defined only in the control plane. The RRC layer controls logical channels, transport channels, and physical channels associated with the configuration, reconfiguration, and release of resource allocation (RBs). RBs are logical paths for data transfer between the UE and the network, provided by Layer 1 (i.e., the physical or PHY layer) and Layer 2 (i.e., the MAC layer, RLC layer, Packet Data Convergence Protocol (PDCP), and Service Data Adaptation Protocol (SDAP) layers).

[0084] The functions of the Packet Data Convergence Protocol (PDCP) in the user plane include transmission of user data, header compression and encryption. The functions of the Packet Data Convergence Protocol (PDCP) in the control plane include transmission and encryption / integrity protection of control plane data.

[0085] The Service Data Adaptation Protocol (SDAP) layer is defined only in the user plane. The SDAP layer performs mapping between Quality of Service (QoS) flows and Data Radio Bearers (DRBs) and QoS Flow ID (QFI) marking in both DL and UL packets.

[0086] RB configuration refers to the process of specifying radio protocol layers and channel attributes to provide a specific service and determining corresponding detailed parameters and operation methods. RBs can be classified into two types: signaling radio bearers (SRBs) and data radio bearers (DRBs). SRBs are used as a path for transmitting RRC messages in the control plane, and DRBs are used as a path for transmitting user data in the user plane.

[0087] When an RRC connection is established between the RRC layer of the UE and the RRC layer of the E-UTRAN, the UE is in the RRC connected (RRC_CONNECTED) state, otherwise the UE may be in the RRC idle (RRC_IDLE) state. In the case of NR, an RRC inactive (RRC_INACTIVE) state is additionally defined, and the UE in the RRC_INACTIVE state may maintain its connection with the core network while releasing its connection with the BS.

[0088] Data is sent from the network to the UE via a downlink transport channel. Examples of downlink transport channels include a broadcast channel (BCH) for transmitting system information and a downlink shared channel (SCH) for transmitting other user traffic or control messages. Traffic or control messages for downlink multicast or broadcast services may be sent via the downlink SCH or may be sent via a separate downlink multicast channel (MCH). In addition, uplink transport channels for sending (or transmitting) data from the UE to the network include a random access channel (RACH) for sending initial control messages and an uplink shared channel (SCH) for sending other user traffic or control messages.

[0089] Examples of logical channels belonging to a higher layer of a transport channel and mapped to a transport channel may include a broadcast control channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), a multicast control channel (MCCH), a multicast traffic channel (MTCH), etc.

[0090] A radio frame can be used to perform uplink and downlink transmissions. A radio frame has a length of 10 ms and can be defined as consisting of two half frames (HFs). A half frame can include five 1 ms subframes (SFs). A subframe (SF) can be divided into one or more time slots, and the number of time slots within a subframe can be determined by the subcarrier spacing (SCS). Each time slot can include 12 or 14 OFDM (A) symbols depending on the cyclic prefix (CP).

[0091] When using a normal CP, each time slot can include 14 symbols. When using an extended CP, each time slot can include 12 symbols. Herein, a symbol may include an OFDM symbol (or a CP-OFDM symbol) and a single carrier-FDMA (SC-FDMA) symbol (or a discrete Fourier transform spread OFDM (DFT-s-OFDM) symbol).

[0092] Table 2 shown below shows the number of symbols (N) per slot based on the SCS configuration (μ) in the case of using a normal CP or an extended CP. slot symb ), the number of time slots per frame (N frame,μ slot ) and the number of time slots per subframe (N subframe ,μ slot ).

[0093] [Table 2]

[0094]

[0095] Figure 6 The structure of the time slot of the NR frame according to an embodiment of the present disclosure is shown. Figure 6 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0096] Reference Figure 6 , a time 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 a plurality of consecutive subcarriers in the frequency domain (e.g., 12 subcarriers). A bandwidth part (BWP) can be defined as a plurality of consecutive (physical) resource blocks ((P)RBs) in the frequency domain, and a BWP can correspond to a parameter set (e.g., SCS, CP length, etc.). A carrier can include up to N BWPs (e.g., 5 BWPs). Data communication can be performed via activated BWPs. Each element can be referred to as a resource element (RE) in a resource grid, and a complex symbol can be mapped to each element.

[0097] A BWP may be a contiguous set of physical resource blocks (PRBs) within a given parameter set. A PRB may be selected from a contiguous set of common resource blocks (CRBs) for a given parameter set on a given carrier.

[0098] Figure 7 An example of a BWP according to an embodiment of the present disclosure is shown. Figure 7 The embodiments of can be combined with various embodiments of the present disclosure. Figure 7 In the embodiment of the present invention, the number of BWPs is 3.

[0099] Reference Figure 7 , Common Resource Blocks (CRBs) may be carrier resource blocks numbered from one end of the carrier frequency band to the other. Additionally, PRBs may be resource blocks numbered within each BWP. Point A may indicate a common reference point for the resource block grid.

[0100] It can be obtained by point A, the offset relative to point A (N start BWP ) and bandwidth (N size BWP ) to configure the BWP. For example, point A can be an external reference point of the PRBs of a carrier, and subcarrier 0 of all parameter sets (e.g., all parameter sets supported by the network on the corresponding carrier) is aligned in point A. For example, the offset can be the PRB distance between the lowest subcarrier in a given parameter set and point A. For example, the bandwidth can be the number of PRBs in a given parameter set.

[0101] The side link synchronization signal (SLSS) may include a primary side link synchronization signal (PSSS) and a secondary side link synchronization signal (SSSS) as a side link (SL) specific sequence. The PSSS may be referred to as a side link primary synchronization signal (S-PSS), and the SSSS may be referred to as a side link secondary synchronization signal (S-SSS). For example, an M sequence of length 127 may be used for the S-PSS, and a Gold sequence of length 127 may be used for the S-SSS. For example, the UE may use the S-PSS for initial signal detection and synchronization acquisition. For example, the UE may use the S-PSS and the S-SSS for acquisition of detailed synchronization and for detection of a synchronization signal ID.

[0102] The physical sidelink broadcast channel (PSBCH) can be a (broadcast) channel for transmitting default (system) information, which must be known by the UE before SL signal transmission / reception. For example, the default information can be information related to SLSS, duplex mode (DM), time division duplex (TDD) uplink / downlink (UL / DL) configuration, information related to resource pool, type of application related to SLSS, subframe offset, broadcast information, etc. For example, in order to evaluate PSBCH performance, in NR V2X, the payload size of PSBCH can be 56 bits, including a 24-bit cyclic redundancy check (CRC).

[0103] S-PSS, S-SSS and PSBCH can be included in a block format that supports periodic transmission (e.g., SL synchronization signal (SS) / PSBCH block, hereinafter, sidelink synchronization signal block (S-SSB)). The S-SSB can have the same parameter set (i.e., SCS and CP length) as the physical sidelink control channel (PSCCH) / physical sidelink shared channel (PSSCH) in the carrier, and the transmission bandwidth can exist within the (pre-) configured sidelink (SL) BWP. For example, the S-SSB can have a bandwidth of 11 resource blocks (SBs). For example, the PSBCH can exist across 11 RBs. In addition, the frequency position of the S-SSB can be (pre-) configured. Therefore, the UE does not have to perform hypothesis detection at the frequency to discover the S-SSB in the carrier.

[0104] In the present disclosure, PSCCH may be replaced by a control channel, a physical control channel, a control channel associated with a sidelink, a physical control channel associated with a sidelink, etc. In the present disclosure, PSSCH may be replaced by a shared channel, a physical shared channel, a shared channel associated with a sidelink, a physical shared channel associated with a sidelink, etc.

[0105] Figure 8 A process of performing V2X or SL communication by a UE based on a resource allocation mode according to an embodiment of the present disclosure is shown. Figure 8 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0106] Reference Figure 8 (a), in resource allocation mode 1, the base station may schedule SL resources to be used by the UE for SL transmission. For example, in step S800, the base station may send information related to the SL resources and / or information related to the UL resources to the first UE. For example, the UL resources may include PUCCH resources and / or PUSCH resources. For example, the UL resources may be resources used to report SL HARQ feedback to the base station.

[0107] For example, the first UE may receive information related to dynamic grant (DG) resources and / or information related to configuration grant (CG) resources from the base station. For example, the CG resources may include CG type 1 resources or CG type 2 resources. In the present disclosure, the DG resources may be resources configured / allocated to the first UE by the base station through downlink control information (DCI). In the present disclosure, the CG resources may be (periodic) resources configured / allocated to the first UE by the base station through DCI and / or RRC messages. 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 UE. 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 UE, and the base station may send a DCI related to the activation or release of the CG resources to the first UE.

[0108] In step S810, the first UE may send a PSCCH (e.g., sidelink control information (SCI) or first-level SCI) to the second UE based on resource scheduling. In step S820, the first UE may send a PSSCH (e.g., second-level SCI, MAC PDU, data, etc.) related to the PSCCH to the second UE. In step S830, the first UE may receive a PSFCH related to the PSCCH / PSSCH from the second UE. For example, HARQ feedback information (e.g., NACK information or ACK information) may be received from the second UE via the PSFCH. In step S840, the first UE may send / report the HARQ feedback information to the base station via the PUCCH or PUSCH. For example, the HARQ feedback information reported to the base station may be information generated by the first UE based on the HARQ feedback information received from the second UE. For example, the HARQ feedback information reported to the base station may be information generated by the first UE based on a preconfigured rule. For example, the DCI may be DCI for SL scheduling.

[0109] Reference Figure 8(b) in resource allocation mode 2, the UE may determine the SL transmission resources within the SL resources configured by the base station / network or the preconfigured SL resources. For example, the configured SL resources or the preconfigured SL resources may be a resource pool. For example, the UE may autonomously select or schedule resources for SL transmission. For example, the UE may perform SL communication by autonomously selecting resources within the configured resource pool. For example, the UE may autonomously select resources within a selection window by performing a sensing process and a resource (re)selection process. For example, sensing may be performed in units of subchannels. For example, in step S810, the first UE, which has selected resources from the resource pool by itself, may send a PSCCH (e.g., sidelink control information (SCI) or a first-level SCI) to a second UE by using the resources. In step S820, the first UE may send a PSSCH (e.g., a second-level SCI, a MAC PDU, data, etc.) related to the PSCCH to the second UE. In step S830, the first UE may receive a PSFCH related to the PSCCH / PSSCH from the second UE.

[0110] Reference Figure 8 (a) or (b), for example, the first UE may send the SCI to the second UE via the PSCCH. Alternatively, for example, the first UE may send two consecutive SCIs (e.g., level 2 SCIs) to the second UE via the PSCCH and / or PSSCH. In this case, the second UE may decode the two consecutive SCIs (e.g., level 2 SCIs) to receive the PSSCH from the first UE. In the present disclosure, the SCI sent via the PSCCH may be referred to as the first SCI, the first SCI, the first level SCI, or the first level SCI format, and the SCI sent via the PSSCH may be referred to as the second SCI, the second SCI, the second level SCI, or the second level SCI format.

[0111] Reference Figure 8 (a) or (b), in step S830, the first UE may receive the PSFCH. For example, the first UE and the second UE may determine the PSFCH resources, and the second UE may use the PSFCH resources to send HARQ feedback to the first UE.

[0112] Reference Figure 8 (a), in step S840, the first UE may send SL HARQ feedback to the base station via PUCCH and / or PUSCH.

[0113] Hereinafter, examples (embodiments) of the frequency range of the wireless communication system will be described.

[0114] The frequency band may be defined as two different types of frequency ranges. The two different types of frequency ranges may be FR1 and FR2. The value of the frequency range may be changed (or varied), and for example, the two different types of frequency ranges may be as shown in Table 3 below. Among the frequency ranges used in the NR system, FR1 may mean "a range below 6 GHz", while FR2 may mean "a range above 6 GHz" and may also be referred to as millimeter wave (mmW).

[0115] [Table 3]

[0116] Frequency range specification Corresponding frequency range Subcarrier spacing (SCS) FR1 450MHz–6000MHz 15kHz, 30kHz, 60kHz FR2 24250MHz–52600MHz 60kHz, 120kHz, 240kHz

[0117] As described above, the value of the frequency range in the NR system can be changed (or varied). For example, as shown in Table 4 below, FR1 may include a frequency band in the range of 410 MHz to 7125 MHz. More specifically, FR1 may include a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) and higher. For example, a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) and higher included in FR1 may include an unlicensed frequency band. The unlicensed frequency band can be used for a variety of purposes, for example, the unlicensed frequency band is used for vehicle-specific communications (e.g., autonomous driving).

[0118] [Table 4]

[0119]

[0120] Hereinafter, an example of SCI format 1-A will be described.

[0121] SCI format 1-A is used for scheduling PSSCH and the second level SCI on PSSCH.

[0122] The following information is sent via SCI Format 1-A:

[0123] - Priority - 3 bits

[0124] - Frequency Resource Assignment - When the value of the higher layer parameter sl-MaxNumPerReserve is configured as 2, ceiling(log2(N SL subChannel (N SL subChannel +1) / 2)) bits; otherwise, when the value of the high-level parameter sl-MaxNumPerReserve is configured as 3, the ceiling log2(N SL subChannel (N SL subChannel +1)(2N SL subChannel +1) / 6) bits.

[0125] - Time resource assignment - 5 bits when the value of the higher-layer parameter sl-MaxNumPerReserve is configured as 2; otherwise, 9 bits when the value of the higher-layer parameter sl-MaxNumPerReserve is configured as 3

[0126] -Resource Reservation Period - If the higher-level parameter sl-MultiReserveResource is configured, the ceiling(log2 N rsv_period ) bits, where N rsv_period is the number of entries in the higher-level parameter sl-ResourceReservePeriodList; otherwise, 0

[0127] -DMRS pattern -ceiling(log2 N pattern ) bits, where N pattern The number of DMRS patterns configured by the higher-layer parameter sl-PSSCH-DMRS-TimePatternList

[0128] - Second level SCI format - 2 bits, as defined in Table 5

[0129] - Beta_offset indicator - 2 bits, as provided by the higher layer parameter sl-BetaOffsets2ndSCI

[0130] - Number of DMRS ports - 1 bit, as defined in Table 6

[0131] - Modulation and coding scheme - 5 bits

[0132] - 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; otherwise, 0 bit

[0133] -PSFCH overhead indication - 1 bit if the higher layer parameter sl-PSFCH-Period = 2 or 4; otherwise, 0 bit

[0134] - Reserved bits - The number of bits determined by the higher layer parameter sl-NumReservedBits, whose value is set to zero.

[0135] [Table 5]

[0136] The value of the second-level SCI format field Second level SCI format 00 SCI Format 2-A 01 SCI Format 2-B 10 reserve 11 reserve

[0137] [Table 6]

[0138] The value of the Number of DMRS Ports field Antenna port 0 1000 1 1000 and 1001

[0139] Hereinafter, an example of SCI format 2-A will be described.

[0140] SCI format 2-A is used for decoding of the PSSCH and is used together with the HARQ operation when the HARQ-ACK information includes ACK or NACK, when the HARQ-ACK information includes only NACK, or when there is no feedback of HARQ-ACK information.

[0141] The following information is sent via SCI Format 2-A:

[0142] -HARQ process number - 4 bits

[0143] - New data indicator - 1 bit

[0144] - Redundancy version - 2 bits

[0145] - Source ID - 8 bits

[0146] -Destination ID - 16 digits

[0147] -HARQ feedback enable / disable indicator - 1 bit

[0148] - Broadcast Type Indicator - 2 bits, as defined in Table 7

[0149] -CSI request - 1 bit

[0150] [Table 7]

[0151] The value of the broadcast type indicator Broadcast Type 00 broadcast 01 Multicast when HARQ-ACK information includes ACK or NACK 10 Unicast 11 Multicast when HARQ-ACK information includes only NACKs

[0152] Hereinafter, an example of SCI format 2-B will be described.

[0153] For HARQ operation, when HARQ-ACK information includes only NACK, or when there is no feedback of HARQ-ACK information, SCI format 2-B is used for decoding of PSSCH.

[0154] The following information is sent via SCI Format 2-B:

[0155] -HARQ process number - 4 bits

[0156] - New data indicator - 1 bit

[0157] - Redundancy version - 2 bits

[0158] - Source ID - 8 bits

[0159] -Destination ID - 16 digits

[0160] -HARQ feedback enable / disable indicator - 1 bit

[0161] -Region ID - 12 digits

[0162] -Communication range requirement - 4 bits determined by the higher-layer parameter sl-ZoneConfigMCR-Index

[0163] refer to Figure 8 (a) or (b), in step S830, the first UE may receive the PSFCH. For example, the first UE and the second UE may determine the PSFCH resources, and the second UE may use the PSFCH resources to send HARQ feedback to the first UE.

[0164] refer to Figure 8 (a), in step S840, the first UE may send SL HARQ feedback to the base station via PUCCH and / or PUSCH.

[0165] Figure 9 Three broadcast types are shown in accordance with embodiments of the present disclosure. Figure 9 The embodiments of can be combined with various embodiments of the present disclosure. Specifically, Figure 9 (a) shows broadcast type SL communication, Figure 9 (b) in FIG. 1 shows unicast type SL communication, and Figure 9 (c) in FIG. 5 shows multicast SL communication. In the case of unicast SL communication, the UE can perform one-to-one communication with another UE. In the case of multicast SL transmission, the UE can perform SL communication with one or more UEs in the group to which the UE belongs. In various embodiments of the present disclosure, SL groupcast communication can be replaced by SL multicast communication, SL one-to-many communication, etc.

[0166] Hereinafter, a hybrid automatic repeat request (HARQ) process will be described.

[0167] For example, SL HARQ feedback can be enabled for unicast. In this case, in non-code block group (non-CBG) operation, if the receiving UE decodes the PSCCH whose target is the receiving UE and if the receiving UE successfully decodes the transport block associated with the PSCCH, the receiving UE can generate a HARQ-ACK. In addition, the receiving UE can send a HARQ-ACK to the transmitting UE. Otherwise, if the receiving UE cannot successfully decode the transport block after decoding the PSCCH whose target is the receiving UE, the receiving UE can generate a HARQ-NACK. In addition, the receiving UE can send a HARQ-NACK to the transmitting UE.

[0168] For example, SL HARQ feedback may be enabled for multicast.For example, in non-CBG operation, two HARQ feedback options may be supported for multicast.

[0169] (1) Multicast Option 1: After a receiving UE decodes a PSCCH destined for the receiving UE, if the receiving UE cannot decode the transport block associated with the PSCCH, the receiving UE may send a HARQ-NACK to the transmitting UE via the PSFCH. Otherwise, if the receiving UE decodes the PSCCH destined for the receiving UE and if the receiving UE successfully decodes the transport block associated with the PSCCH, the receiving UE may not send a HARQ-ACK to the transmitting UE.

[0170] (2) Multicast Option 2: After a receiving UE decodes a PSCCH targeted for the receiving UE, if the receiving UE cannot decode the transport block associated with the PSCCH, the receiving UE may send a HARQ-NACK to the transmitting UE via the PSFCH. Alternatively, if the receiving UE decodes a PSCCH targeted for the receiving UE and successfully decodes the transport block associated with the PSCCH, the receiving UE may send a HARQ-ACK to the transmitting UE via the PSFCH.

[0171] For example, if multicast option 1 is used for SL HARQ feedback, all UEs performing multicast communication can share PSFCH resources. For example, UEs belonging to the same group can send HARQ feedback by using the same PSFCH resources.

[0172] For example, if multicast option 2 is used for SL HARQ feedback, each UE performing multicast communication may use different PSFCH resources for HARQ feedback transmission. For example, UEs belonging to the same group may send HARQ feedback by using different PSFCH resources.

[0173] In the present disclosure, 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.

[0174] In the following, the UE procedure for determining the resource subset to be reported to higher layers in PSSCH resource selection in sidelink resource allocation mode 2 will be described.

[0175] In resource allocation mode 2, higher layers may request the UE to determine a subset of resources from which they will select resources for PSSCH / PSCCH transmission. To trigger this process, in time slot n, higher layers provide the following parameters for PSSCH / PSCCH transmission.

[0176] - the resource pool from which the resource is to be reported;

[0177] -L1 priority, prioTX ;

[0178] - remaining packet delay budget;

[0179] -The number of subchannels used for PSSCH / PSCCH transmission in a time slot, L subCH ;

[0180] -Optionally, the resource reservation interval P rsvp_TX , in milliseconds.

[0181] - As part of the re-evaluation or pre-emption procedure, if higher layers request the UE to determine a subset of resources from which the higher layers will select resources for PSSCH / PSCCH transmission, the higher layers provide the set of resources that may be subject to re-evaluation (r0, r1, r2, ...) and the set of resources that may be subject to pre-emption (r'0, r'1, r'2, ...).

[0182] - It is up to the UE implementation to determine the resource subset requested by higher layers before or after the time slot ri"-T3, where ri" is the time slot with the smallest time slot index among (r0, r1, r2, ...) and (r'0, r'1, r'2, ...), and T3 is equal to T SL proc,1 , where T SL proc,1 It is the number of time slots determined based on the SCS configuration of the SL BWP.

[0183] The following higher-level parameters influence this process:

[0184] -sl-SelectionWindowList: internal parameter T 2min is set to come from the TX The corresponding value of the higher-level parameter sl-SelectionWindowList for the given value.

[0185] -sl-Thres-RSRP-List: This higher layer parameter is used for each combination (p i , p j ) provides the RSRP threshold, where p i is the value of the priority field in the received SCI format 1-A, p j is the priority of the UE in selecting resources for transmission; for a given invocation of this procedure, p j =prio TX .

[0186] -sl-RS-ForSensing selects whether the UE uses PSSCH-RSRP or PSCCH-RSRP measurement.

[0187] -sl-ResourceReservePeriodList

[0188] -sl-SensingWindow: The internal parameter T0 is defined as the number of time slots corresponding to sl-SensingWindow milliseconds

[0189] -sl-TxPercentageList: for a given prio TX The internal parameter X is defined as sl-TxPercentageList(prio TX )

[0190] -sl-PreemptionEnable: If sl-PreemptionEnable is provided, and if it is not equal to 'enabled', the internal parameter prio pre Set to the parameter sl-PreemptionEnable provided by higher layers.

[0191] Resource reservation interval P rsvp_TX (If provided) Convert from millisecond units to logical time slot units, yielding P′ rsvp_TX .

[0192] mark:

[0193] (t′ SL 0,t′ SL 1,t′ SL 2, ...) represents the set of time slots belonging to the sidelink resource pool.

[0194] For example, the UE may select a candidate resource set (S A For example, when resource (re)selection is triggered, the UE may select a candidate resource set (S A For example, when re-evaluation or preemption is triggered, the UE may select a candidate resource set (S A ).

[0195] [Table 8]

[0196]

[0197]

[0198]

[0199]

[0200] On the other hand, partial sensing can be 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.

[0201] [Table 9]

[0202]

[0203]

[0204] [Table 10]

[0205]

[0206]

[0207] Hereinafter, synchronization acquisition of SL UE will be described.

[0208] In time division multiple access (TDMA) and frequency division multiple access (FDMA) systems, accurate time and frequency synchronization is essential. If time and frequency synchronization is inaccurate, system performance may be degraded due to inter-symbol interference (ISI) and inter-carrier interference (ICI). The same is true for V2X. In V2X, for time / frequency synchronization, the sidelink synchronization signal (SLSS) can be used in the physical layer, and the master information block-sidelink-V2X (MIB-SL-V2X) can be used in the radio link control (RLC) layer.

[0209] Figure 10 A synchronization source or synchronization reference of V2X based on an embodiment of the present disclosure is shown. Figure 10 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0210] Reference Figure 10 In V2X, the UE can be synchronized directly with the Global Navigation Satellite System (GNSS), or it can be synchronized indirectly with the GNSS through a UE that is directly synchronized with the GNSS (in or out of network coverage). If the GNSS is configured as the synchronization source, the UE can calculate the Direct Frame Number (DFN) and subframe number by using the Coordinated Universal Time (UTC) and a (pre-)configured Direct Frame Number (DFN) offset.

[0211] Alternatively, the UE may synchronize directly with the BS, or may synchronize with another UE that is time / frequency synchronized with the BS. For example, the BS may be an eNB or gNB. For example, if the UE is within network coverage, the UE may receive synchronization information provided by the BS and may synchronize directly with the BS. Thereafter, the UE may provide the synchronization information to another adjacent UE. If BS timing is based on synchronization configuration, for synchronization and downlink measurements, the UE may rely on a cell associated with the corresponding frequency (when it is within cell coverage of that frequency), or a primary cell or serving cell (when it is outside cell coverage of that frequency).

[0212] The BS (e.g., serving cell) may provide a synchronization configuration for the carrier used in V2X or SL communication. In this case, the UE may conform to the synchronization configuration received from the BS. If the UE fails to detect any cell in V2X or SL communication and fails to receive a synchronization configuration from the serving cell, the UE may conform to the pre-configured synchronization configuration.

[0213] Alternatively, the UE may synchronize with another UE that fails to obtain synchronization information directly or indirectly from the BS or GNSS. The synchronization source or preference may be pre-configured to the UE. Alternatively, the synchronization source and preference may be configured via a control message provided by the BS.

[0214] The SL synchronization source may be associated / correlated with the synchronization priority. For example, the relationship between the synchronization source and the synchronization priority may be defined as shown in Table 11 or Table 12. Table 11 or Table 12 is for illustrative purposes only, and the relationship between the synchronization source and the synchronization priority may be defined in various forms.

[0215] [Table 11]

[0216]

[0217] [Table 12]

[0218]

[0219] In Table 11 or Table 12, P0 may indicate the highest priority, and P6 may indicate the lowest priority. In Table 11 or Table 12, the BS may include at least one of a gNB and an eNB. Whether to use GNSS-based synchronization or BS-based synchronization may be (pre-)configured. In single-carrier operation, the UE may derive its transmit timing from the available synchronization reference with the highest priority.

[0220] For example, the UE may (re)select a synchronization reference, and the UE may acquire synchronization from the synchronization reference. In addition, the UE may perform SL communication (e.g., PSCCH / PSSCH transmission / reception, physical sidelink feedback channel (PSFCH) transmission / reception, S-SSB transmission / reception, reference signal transmission / reception, etc.) based on the acquired synchronization.

[0221] Hereinafter, positioning will be described.

[0222] Figure 11 An example of an architecture in a 5G system according to an embodiment of the present disclosure is shown, wherein the 5G system can locate a UE accessing a next-generation radio access network (NG-RAN) or E-UTRAN. Figure 11 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0223] Reference Figure 11 , the AMF may receive a request for location service related to a specific target UE from a different entity such as the Gateway Mobile Location Center (GMLC) or may determine that the location service is to be started in the AMF itself instead of the specific target UE. The AMF may then send a location service request to the Location Management Function (LMF). Upon receiving the location service request, the LMF may process the location service request and return a processing request including the estimated location of the UE, etc. to the AMF. Meanwhile, if the location service request is received from a different entity such as the GMLC other than the AMF, the AMF may pass the processing request received from the LMF to the different entity.

[0224] The next generation evolved NB (ng-eNB) and gNB are network elements of the NG-RAN that can provide measurement results for position estimation, can measure radio signals for target UEs, and can deliver the resulting values ​​to the LMF. In addition, the ng-eNB can control several transmission points (TPs) such as the remote radio head that supports the positioning reference signal (PRS)-based beacon system for E-UTRA or PRS-dedicated TPs.

[0225] The LMF may be connected to the Enhanced Serving Mobile Location Center (E-SMLC) and the E-SMLC may allow the LMF to access the E-UTRAN. For example, the E-SMLC may allow the LMF to support Observed Time Difference of Arrival (OTDOA), one of the positioning methods of the E-UTRAN, by using downlink measurement results obtained by the target UE through signals transmitted from the gNB and / or PRS dedicated TP in the E-UTRAN.

[0226] At the same time, the LMF can be connected to the SUPL Location Platform (SLP). The LMF can support and manage different location determination services for the corresponding target UE. The LMF can interact with the serving ng-eNB or serving gNB for the target UE to obtain the UE's location measurement results. For the positioning of the target UE, the LMF can determine the positioning method based on the location service (LCS) client type, the requested quality of service (QoS), the UE positioning capabilities, the gNB positioning capabilities, and the ng-eNB positioning capabilities, and can apply such positioning methods to the serving gNB and / or serving ng-eNB. In addition, the LMF can determine additional information such as the position estimate of the target UE and the accuracy of the position estimate and velocity. The SLP is the secure user plane location (SUPL) entity responsible for positioning through the user plane.

[0227] The UE may measure downlink signals through NG-RAN, E-UTRAN and / or other sources such as: different global navigation satellite systems (GNSS) and terrestrial beacon systems (TBS), wireless local access network (WLAN) access points, Bluetooth beacons, UE air pressure sensors, etc. The UE may include an LCS application. The UE may communicate with a network that the UE can access, or the LCS application may be accessed by another application included in the UE. The LCS application may include measurement and calculation functions required to determine the position of the UE. For example, the UE may include an independent positioning function such as a global positioning system (GPS) and may report the position of the UE independent of NG-RAN transmissions. Positioning information obtained independently in this way may be used as auxiliary information for positioning information obtained from the network.

[0228] Figure 12 An example of implementing a network for measuring the location of a UE based on an embodiment of the present disclosure is shown. Figure 12 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0229] When the UE is in the Connection Management (CM)-Idle state, if the AMF receives a location service request, the AMF may establish a signaling connection with the UE and may request the network to trigger a service to allocate a specific serving gNB or ng-eNB. Figure 12 This operation process is omitted in Figure 12 It is assumed that the UE is in connected mode. However, due to signaling and data deactivation, the signaling connection may be released by the NG-RAN while performing the positioning procedure.

[0230] Will refer to Figure 12This section describes in detail the network operation process for measuring the location of the UE. In step a1, a 5GC entity such as a GMLC may request the serving AMF to provide location services for measuring the location of the target UE. However, even if the GMLC does not request location services, the serving AMF may determine that location services are required for measuring the location of the target UE based on step 1b. For example, to measure the location of a UE for an emergency call, the serving AMF may determine to directly perform location services.

[0231] Thereafter, the AMF may send a location service request to the LMF based on step 2, and the LMF may initiate a location procedure to obtain location measurement data or location measurement assistance data with the serving ng-eNB and serving gNB. Additionally, based on step 3b, the LMF may initiate a location procedure for downlink positioning with the UE. For example, the LMF may send assistance data as defined in 3GPP TS 36.355, or may obtain a location estimate or location measurement. Step 3b may be performed in addition to or instead of step 3a.

[0232] In step 4, the LMF may provide a location service response to the AMF. In addition, the location service response may include information about whether the UE's location estimation is successful and the UE's location estimation value. Figure 12 The AMF may deliver the location service response to the 5GC entity, such as GMLC, and if initiated by step 1b Figure 12 The AMF can use the location service response to provide location services related to emergency calls, etc.

[0233] Figure 13 An example of a protocol layer for supporting LTE Positioning Protocol (LPP) message transmission between an LMF and a UE according to an embodiment of the present disclosure is shown. Figure 13 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0234] LPP PDU can be sent between AMF and UE via NAS PDU. Figure 13 , LPP can terminate between a target device (e.g., a UE in the control plane or a SUPL-capable terminal (SET) in the user plane) and a location server (e.g., a LMF in the control plane and an SLP in the user plane). LPP messages can be delivered in the form of transparent PDUs over intermediate network interfaces using appropriate protocols such as: NG Application Protocol (NGAP) over the NG-Control (NG-C) interface and NAS / RRC over the NR-Uu interface. The LPP protocol can enable positioning for NR and LTE using various positioning methods.

[0235] For example, based on the LPP protocol, the target device and the location server can exchange mutual capability information, assistance data for positioning, and / or location information. In addition, LPP messages can be used to indicate the exchange of error information and / or the interruption of the LPP process.

[0236] Figure 14 An example of protocol layers for supporting NR Positioning Protocol A (NRPPa) PDU transmission between LMF and NG-RAN nodes based on an embodiment of the present disclosure is shown. Figure 14 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0237] NRPPa can be used for information exchange between NG-RAN nodes and LMF. Specifically, NRPPa can exchange enhanced cell IDs (E-CIDs) for measurement, data for supporting OTDOA positioning methods, and cell IDs, cell location IDs, etc. for NR cell ID positioning methods sent from ng-eNB to LMF. Even if there is no information about the associated NRPPa transaction, the AMF can route NRPPa PDUs based on the routing ID of the associated LMR through the NG-C interface.

[0238] The procedures of the NRPPa protocol for location and data collection can be categorized into two types. The first type is a UE-related procedure for transferring information about a specific UE (e.g., location measurement information, etc.), while the second type is a non-UE-related procedure for transferring information applicable to NG-RAN nodes and related TPs (e.g., gNB / ng-eNB / TP timing information, etc.). Both types of procedures can be supported independently or simultaneously.

[0239] Meanwhile, examples of positioning methods supported in NG-RAN may include GNSS, OTDOA, enhanced cell ID (E-CID), air pressure sensor positioning, WLAN positioning, Bluetooth positioning and terrestrial beacon system (TBS), uplink time difference of arrival (UTDOA), and the like.

[0240] (1) OTDOA (Observed Time Difference of Arrival)

[0241] Figure 15 It is a diagram for explaining the OTDOA positioning method according to an embodiment of the present disclosure. Figure 15 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0242] The OTDOA positioning method uses the measured timing of downlink signals received by the UE from the eNB, ng-eNB, and multiple TPs, including PRS-dedicated TPs. The UE measures the timing of the received downlink signals using location assistance data received from a location server. Furthermore, the UE's position can be determined based on these measurement results and the geometric coordinates of neighboring TPs.

[0243] A UE connected to a gNB may request measurement gaps from a TP for OTDOA measurements. If the UE cannot identify the single frequency network (SFN) of at least one TP in the OTDOA assistance data, the UE may use autonomous gaps to obtain the SNF of the OTDOA reference cell before requesting measurement gaps to perform reference signal time difference (RSTD) measurements.

[0244] In this article, RSTD can be defined based on the minimum relative time difference between the boundaries of two subframes received from the reference cell and the measurement cell, respectively. In other words, RSTD can be calculated based on the relative time difference between the start time of the subframe received from the measurement unit and the start time of the subframe of the reference unit closest to the start time of the subframe received from the measurement unit. At the same time, the reference cell can be selected by the UE.

[0245] For correct OTDOA measurement, it may be necessary to measure the time of arrival (TOA) of signals received from three or more geographically distributed TPs or BSs. For example, the TOA can be measured for each of TP1, TP2, and TP3, and the RSTD of TP1-TP2, the RSTD of TP2-TP3, and the RSTD of TP3-TP1 can be calculated for the three TOAs. Based on this, a geometric hyperbola can be determined, and the point where these hyperbolas intersect can be estimated as the position of the UE. In this case, since the accuracy and / or uncertainty of each TOA measurement may exist, the estimated position of the UE can be referred to as a specific range based on the measurement uncertainty.

[0246] For example, the RSTD of the two TPs may be calculated based on Equation 1.

[0247] [Formula 1]

[0248]

[0249] In this paper, c can be the speed of light, {x t ,y t} can be the (unknown) coordinates of the target UE, {x i ,y i} may be the coordinates of a (known) TP, and {x1, y1} may be the coordinates of a reference TP (or another TP). i-T1) is called the "real time difference (RTD)" which is the transmission time offset between two TPs, and n i , n1 can represent a value related to the UE TOA measurement error.

[0250] (2) E-CID (Enhanced Cell ID)

[0251] In the Cell ID (CID) positioning method, the UE's location can be measured using the 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 through paging, registration, etc.

[0252] At the same time, in addition to the CID positioning method, the E-CID positioning method can also use additional UE measurements and / or NG-RAN radio resources to improve the UE position estimate. In the E-CID positioning method, although some of the same measurement methods used in the measurement control system of the RRC protocol can be used, in general, additional measurements are not performed solely for the UE's position measurement. In other words, measurement configuration or measurement control messages may not be additionally provided to measure the UE's position. In addition, the UE may not expect to request additional measurement operations solely for position measurement and may report measurement values ​​obtained using measurement methods that the UE can generally perform measurements on.

[0253] For example, the serving gNB may implement the E-CID positioning method using E-UTRA measurements provided from the UE.

[0254] Examples of measurement elements that can be used for E-CID positioning may be as follows.

[0255] -UE measurements: E-UTRA Reference Signal Received Power (RSRP), E-UTRA Reference Signal Received Quality (RSRQ), UE E-UTRA Rx-Tx Time Difference, GSM EDGE Random Access Network (GERAN) / WLAN Reference Signal Strength Indicator (RSSI), UTRAN Common Pilot Channel (CPICH) Received Signal Code Power (RSCP), UTRAN CPICH Ec / Io

[0256] -E-UTRAN measurements: ng-eNB Rx-Tx time difference, timing advance (TADV), angle of arrival (AoA).

[0257] Herein, TADV can be classified into Type 1 and Type 2 as follows.

[0258] TADV type 1 = (ng-eNB Rx-Tx time difference) + (UE E-UTRA Rx-Tx time difference)

[0259] TADV type 2 = ng-eNB Rx-Tx time difference

[0260] At the same time, AoA can be used to measure the direction of the UE. AoA can be defined as the estimated angle relative to the UE's position in a counterclockwise direction from the BS / TP. In this case, the geographic reference direction can be north. The BS / TP can use uplink signals such as the sounding reference signal (SRS) and / or the demodulation reference signal (DMRS) for AoA measurement. In addition, the larger the antenna array is arranged, the higher the measurement accuracy of AoA. When the element antenna array is arranged at the same interval, the signals received from adjacent antennas can have a constant phase rotation.

[0261] (3) UTDOA (Uplink Time Difference of Arrival)

[0262] UTDOA is a method for determining the UE's location by estimating the arrival time of the SRS. When the estimated SRS arrival time is calculated, the UE's location can be estimated by using the serving cell as a reference cell via the arrival time difference relative to another cell (or BS / TP). To implement UTDOA, the E-SMLC can indicate the serving cell of the target UE to indicate the SRS transmission to the target UE. In addition, the E-SMLC can provide configurations such as whether the SRS is periodic / aperiodic, bandwidth, frequency / group / sequence hopping, etc.

[0263] (4) RTT (Round Trip Time)

[0264] RTT is a positioning technology that can measure the distance between two entities even if the target entity and the server entity are not synchronized in time. If RTT is performed using multiple server entities, the distance to each server entity can be measured. If circles are drawn using the distances measured from each server entity, the target entity can be absolutely positioned at the point where the circles intersect.

[0265] The RTT between two entities is calculated as follows. Entity #1 can transmit PRS #1 at t1, and entity #2 can receive PRS #1 at t2. After entity #2 receives PRS #1, entity #2 can transmit PRS #2 at t3, and entity #1 can receive PRS #2 at t4. In this case, the distance D between the two entities can be obtained as follows.

[0266] D = cx{(t4-t1)-(t3-t2)} / 2 (where c is the speed of light)

[0267] For the RTT between the UE and the gNB, the distance between the UE and the gNB can be obtained based on the above formula using the UE Rx-Tx time difference and the gNB Rx-Tx time difference in Table 16 and Table 18 below.

[0268] (5) Bilateral RTT

[0269] Figure 16 A two-sided RTT according to one embodiment of the present disclosure is shown. Figure 16 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0270] The method for performing two-sided RTT between two entities is as follows.

[0271] Two-sided RTT is 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.

[0272] Bilateral RTT is widely used in ultra-wideband (UWB) positioning and can reduce the impact of clock errors.

[0273] For example, the propagation delay T ^ It can be obtained from two measurements (e.g., T round1 、T round2 、T reply1 、T reply2 ) to estimate.

[0274] For example, the propagation delay T(T ^ ) can be estimated based on Equation 2.

[0275] [Formula 2]

[0276]

[0277] For example, the propagation delay T(T ^ ) can be estimated based on Equation 3.

[0278] [Formula 3]

[0279]

[0280] In addition, T can be obtained based on Equation 4 round1 ×T round2 -T reply1 ×T reply2 .

[0281] [Formula 4]

[0282]

[0283] Here, Formula 4 may be the same as Formula 5.

[0284] [Formula 5]

[0285]

[0286] Therefore, the propagation delay T(T ^ ).

[0287] [Formula 6]

[0288]

[0289] In this case, the error in propagation delay estimation due to clock error can be obtained based on Equation 7.

[0290] [Formula 7]

[0291]

[0292] Here, e UE1 and e UE2 It can be the clock offset between UE1 and UE2;

[0293] Propagation delay T(T ^ ) may be the estimated propagation delay between UE1 and UE2.

[0294] For example, Table 13 shows a definition and usage example of Reference Signal Time Difference (RSTD).

[0295] [Table 13]

[0296]

[0297]

[0298] Table 14 shows the definition and usage example of DL PRS reference signal received power (RSRP).

[0299] [Table 14]

[0300]

[0301] Table 15 shows the definition and usage example of DL relative signal time difference (RSTD).

[0302] [Table 15]

[0303]

[0304] Table 16 shows the definition and usage example of UE Rx-Tx time difference.

[0305] [Table 16]

[0306]

[0307]

[0308] Table 17 shows the UL relative time of arrival (UL RTOA) (T UL-RTOA ) definition and usage examples.

[0309] [Table 17]

[0310]

[0311] Table 18 shows the definition and usage example of gNB Rx-Tx time difference.

[0312] [Table 18]

[0313]

[0314] Table 19 shows the definition and usage example of UL angle of arrival (AoA).

[0315] [Table 19]

[0316]

[0317] Table 20 shows the definition and usage example of UL SRS reference signal received power (RSRP).

[0318] [Table 20]

[0319]

[0320] In an embodiment of the present disclosure, a positioning mode may be disclosed. For example, the positioning mode may include standalone, UE-based or UE-assisted. For example, standalone may refer to a positioning mode that determines its own position based on GNSS without the need for PRS (no need to correct positioning errors by PRS). For example, the X in "X-based" and "X-assisted" may refer to a node responsible for positioning calculations (and optionally providing measurement results), and a node that provides measurement results (without performing positioning calculations), respectively. Thus, for example, the operation of providing measurement results used in positioning estimate calculations by the UE to the positioning management function may be described as "UE-assisted" (and may also be referred to as "LMF-based"), while the operation of the UE calculating its own position may be described as "UE-based".

[0321] For example, Table 21 to Table 23 show examples of PRS assistance data.

[0322] [Table 21]

[0323]

[0324] [Table 22]

[0325]

[0326] [Table 23]

[0327]

[0328]

[0329] For example, Table 24 shows an example of positioning reference signal (PRS) configuration.

[0330] [Table 24]

[0331]

[0332]

[0333] In this disclosure, the following terms may be used.

[0334] -LMF- Positioning Management Function

[0335] -UE triggered SL positioning-This procedure can be triggered by the UE.

[0336] - gNB / LMF triggered SL positioning - UE controlled SL positioning: SL positioning groups can be created by the UE. - UE controlled SL positioning - SL positioning in which SL positioning groups are created by the UE.

[0337] - gNB controlled SL positioning - SL positioning in which the gNB creates the SL positioning group.

[0338] -UE-based SL positioning-the UE position can be calculated by the UE.

[0339] -UE assisted SL positioning-UE position can be calculated by the base station / LS.

[0340] -SL positioning group-UEs participating in SL positioning.

[0341] - Target UE (T-UE) - the UE whose position is calculated.

[0342] -Server UE (S-UE)-UE that assists T-UE in SL positioning.

[0343] -MG-only measurement gaps for SL PRS transmission are allowed.

[0344] -MW-A measurement window in which both SL data and SL PRS may be sent in a multiplexed manner.

[0345] -SL PRS - Sidelink Positioning Reference Signal.

[0346] - CCH - Control Channel.

[0347] - IUC message - Inter-UE coordination message - a message received by a transmitting UE from another UE including a receiving UE, the message being for a set of resources suitable for transmission by the transmitting UE to the receiving UE (preferred resources) and / or for a set of resources not suitable for transmission (non-preferred resources).

[0348] According to an embodiment of the present disclosure, the SL PRS sending resources may be configured as a SL PRS resource set, which is configured with the following information.

[0349] -SL PRS resource set ID

[0350] -SL PRS resource ID list - List of SL PRS resource IDs in the SL PRS resource set

[0351] -SL PRS resource type – it can be set as periodic or aperiodic or semi-persistent or on-demand

[0352] -Alpha for SL PRS power control

[0353] - P0 parameters for SL PRS power control

[0354] -Path loss reference for SL PRS power control – It can be set to SL SSB, DL PRS, UL SRS, UL SRS for positioning, PSCCH DMRS, PSSCH DMRS, PSFCH, SL CSI RS, etc.

[0355] According to an embodiment of the present disclosure, a SL PRS resource set may be configured as a SL PRS resource, which is configured with the following information.

[0356] -SL PRS resource ID

[0357] -SL PRS comb size - the spacing between REs that transmit SL PRS within a symbol

[0358] -SL PRS Comb Offset - RE index of the first transmitted SL PRS within the first SL PRS symbol

[0359] -SL PRS Comb Cyclic Shift - Cyclic shift used to generate the sequence constituting the SL PRS

[0360] -SL PRS starting position - the first symbol index of SL PRS sent in a time slot

[0361] -# of SL PRS symbols - the number of symbols that make up the SL PRS in one slot

[0362] - Frequency domain offset - the lowest frequency position (index) in the frequency domain where the SL PRS is transmitted

[0363] -SL PRS BW - frequency bandwidth used for SL PRS transmission

[0364] -SL PRS resource type – it can be set as periodic or aperiodic or semi-persistent or on-demand

[0365] - SL PRS period - the period in the time domain between SL PRS resources, the resource pool logical time slot unit for sending physical or SL PRS

[0366] -SL PRS Offset - The offset in the time domain relative to the starting point of the first SL PRS resource based on the reference timing, in logical time slot units of the resource pool where the physical or SL PRS is transmitted. The reference timing can be SFN=0 or DFN=0, or the time point at which the RRC / MAC-CE / DCI / SCI associated with the SL PRS resource is successfully received or decoded.

[0367] -SL PRS Sequence ID

[0368] -SL PRS spatial relationship – it 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.

[0369] -SL PRS CCH-SL PRS control channel. It can signal SL PRS resource configuration information and resource location.

[0370] According to one embodiment of the present disclosure, when transmission for SL communication and transmission for SL positioning are performed in the same shared resource pool, it may be necessary to define a time slot structure for SL communication and SL positioning transmission in the shared resource pool.

[0371] In the present disclosure, methods and operations for configuring a time slot structure and devices supporting the methods and operations may be proposed, which time slot structure can perform SL positioning while maintaining backward compatibility with devices that perform SL communication only under operating conditions (as described above and below).

[0372] For example, if channels / signals for SL communication and channels / signals for SL positioning are sent from the same shared resource pool, and if the two types of channels / signals are sent while sharing the same time slot, backward compatibility issues may arise, where a device that only supports SL communication cannot decode the channels / signals for SL positioning.

[0373] According to one embodiment of the present disclosure, in order to solve the above-mentioned problem, for example, the shared resource pool configuration can be (pre-)configured so that the time slots for SL communication and the time slots for SL positioning in the shared resource pool do not overlap in the time domain. For example, in the shared resource pool configuration, the time slots for SL communication and the time slots for SL positioning can be periodically (pre-)configured in the time domain within the resource pool. For example, the shared resource pool configuration can be (pre-)configured so that the time slots for SL communication can be used with even-numbered indices and / or the time slots for SL positioning can be used with odd-numbered indices.

[0374] For example, when performing SL PRS transmission in a shared resource pool, when performing a channel busy rate (CBR) measurement to determine SL PRS transmission parameters, a final RSSI (received signal strength indicator) threshold value may be determined by subtracting a (preconfigured) offset value from a (preconfigured) RSSI (received signal strength indicator) threshold value configured for SL communication in the shared resource pool. For example, the above operation may be performed to compensate for a low actual RSSI measurement due to the fact that when RSSI is measured based on the SL PRS bandwidth based on the SL PRS configuration information, the bandwidth of the subchannel used for SL communication may be smaller than the SL PRS bandwidth, resulting in a relatively low actual RSSI measurement.

[0375] For example, if SL PRS resources are reserved based on UE sensing, sensing can be performed only for the periodically configured SL positioning time slots within the sensing window, and / or candidate resource exclusion and / or selection actions can be performed only for the candidate resources included in the periodically configured SL positioning time slots within the selection window based on the sensing results.

[0376] For example, if the UE has reserved N>3 SL PRS transmission resources, the UE may signal up to three reserved SL PRS transmission resources from the N transmission resources via the first SCI for SL communication, and / or the UE may signal which transmission resource (up to three SL PRS transmission resources) is among the N transmission resources via the second SCI. For example, the index of the first transmission resource among the up to three SL PRS transmission resources may be signaled via the second SCI. For example, the index of the last transmission resource among the up to three SL PRS transmission resources may be signaled via the second SCI to allow the RX UE to know how many SL PRS transmission resources are reserved in the future.

[0377] For example, if SL HARQ feedback is enabled in the shared resource pool, and / or if resources for the PSFCH for transmitting SL HARQ feedback are periodically configured in the shared resource pool, the (time slot) period in which the SL positioning time slot is configured can be configured to be the same as the (time slot) period in which the PSFCH resources are configured. In this case, for example, the time slot index in which the SL positioning time slot is configured and the time slot index in which the PSFCH resources are configured can be configured to differ by a (preconfigured) offset so that the SL positioning time slot and the time slot in which the PSFCH resources are configured do not overlap with each other.

[0378] According to one embodiment of the present disclosure, when a phase tracking reference signal (PT-RS) is sent in a SL positioning slot for the purpose of phase tracking of a received signal, the PT-RS may be sent in the SL positioning slot in at least one of the following ways.

[0379] For example, PT-RS transmission may be omitted (canceled) in symbols in which SL PRS is transmitted (in SL positioning slots).

[0380] For example, PT-RS transmission may be omitted (canceled) in symbols where SL PRS is transmitted, and / or in resource locations (positions) (e.g., resource elements or subcarriers) in the frequency domain where PT-RS transmission overlaps with SL PRS.

[0381] For example, in a time slot in a shared resource pool, a PT-RS may be transmitted in a symbol in which an SL PRS is transmitted.

[0382] For example, the PT-RS may be transmitted in PSSCH symbols.

[0383] For example, if multiple SL PRS transmissions are allowed in a time slot, PT-RS may be transmitted in symbols where PSSCH and / or SL PRS are not transmitted.

[0384] For example, PT-RS may be transmitted in SL PRS symbols that are not transmitted via a muting pattern.

[0385] For example, PT-RS transmission may be omitted (canceled) in symbols in which PSCCH / PSSCH and / or SL PRS are not transmitted in a slot.

[0386] For example, the transmission of PT-RS may be canceled in a shared (SL PRS) resource pool and / or in (OFDM) symbols in which SL PRS is transmitted.

[0387] According to various embodiments of the present disclosure, an efficient method for configuring a time slot structure in a shared resource pool for SL positioning and SL communication may be proposed, which is backward compatible with devices that only support SL communication.

[0388] According to one embodiment of the present disclosure, for example, when the resource pool for sending SL PRS for SL positioning and the resource pool for sending channels / signals related to SL PRS are different, it may be necessary to define a method for selecting resources for transmission of SL PRS and channels / signals related to SL PRS.

[0389] In the present disclosure, methods and operations for selecting candidate resources for transmission of SL PRS and transmission resources for transmission of channels / signals related to SL PRS on a random selection basis under some conditions (as described above / below) and devices for supporting the methods and operations may be proposed.

[0390] According to one embodiment of the present disclosure, for example, when performing SL positioning, SL PRS can be sent from resource pool B (for example, a dedicated resource pool for sending SL PRS) and / or channels / signals related to SL PRS (for example, SL communication channels / signals and positioning trigger / control information, SCI, measurement results and / or location information related to SL PRS) can be sent from resource pool A, and the UE can select the transmission resources related to SL PRS on a random selection basis in at least one of the following ways.

[0391] For example, SCI transmission resources in resource pool A can be randomly selected (the term "SCI transmission resources" can be extended to PSSCH (resources) and / or PSCCH (resources) for sending SCI, as described below / disclosed below), and / or SL PRS transmission resources in resource pool B can be selected based on sensing.

[0392] For example, in the case of non-periodic SL PRS transmission resource selection triggering, and / or in the case of low-demand SL PRS transmission delay, SCI transmission resources related to SLPRS can be randomly selected within a relatively short time interval after the SL PRS transmission resource selection triggering to meet the delay requirements for SL PRS transmission.

[0393] For example, the SL PRS transmission resources may be selected based on sensing of (the first SCI and / or the second SCI) in resource pool A.

[0394] For example, the operations (as described above) may be performed only when the priority associated with the SL PRS and / or SCI or the representative priority value associated with the SL PRS is lower than a (preconfigured) threshold priority / value.

[0395] 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.

[0396] For example, the above operation may be performed only when the channel busy rate (CBR) value of resource pool A and / or the channel busy rate (CBR) value of resource pool B or a representative CBR value of the two CBR values ​​is lower than a (preconfigured) threshold.

[0397] For example, the representative channel busy rate value may be determined as an average value or a maximum / minimum value of the channel busy rate values ​​of resource pool A and resource pool B.

[0398] For example, the above operation may be determined based on a delay requirement for transmitting the SL PRS, the number of periodic / cyclic transmissions of the SL PRS, and / or whether to perform feedback-based retransmission of the SL PRS upon receiving the SL PRS.

[0399] For example, the above operation may be limited to the case where random resource selection from resource pool A is (pre-)configured to be allowed.

[0400] According to one embodiment of the present disclosure, for example, the SCI transmission resources in resource pool A may be selected based on sensing, and the SL PRS transmission resources in resource pool B may be randomly selected.

[0401] For example, in the case of power saving, DRX (discontinuous reception) operation / configuration of the UE, the second SCI sending SL PRS reservation information from resource pool A may not be received / decoded, and / or the SLPRS (transmission resource) from resource pool B may be randomly sent (selected).

[0402] For example, since SL PRS detection performance may be good even at low SINR (Signal to Interference and Noise Ratio), randomly selecting SL PRS transmission resources within the delay requirement and the (remaining) delay budget may not lead to significant performance degradation due to resource contention.

[0403] For example, when the number of PSCCH / PSSCH symbols in resource pool A that send the above-mentioned SCI is lower than a (pre-configured) threshold, and / or there is no reference signal received power (RSRP) measurement result for SL PRS in resource pool B related to the second SCI sensed by resource pool A, and / or the number of SL PRS resources is lower than a (pre-configured) threshold, the SL PRS candidate resources indicated by the second SCI can be regarded as non-monitored resources, and / or can be excluded from the candidate resources, and / or if the number of candidate resources remaining after performing the candidate resource exclusion operation is less than the number of target candidate resources, the excluded candidate resources can be restored (can be selected), and / or (in the above case) the SL PRS resources can be randomly selected.

[0404] For example, the SL SCI transmission resource may be selected based on sensing of the first SCI in resource pool A.

[0405] For example, the above operations can be determined based on the priority associated with the SL PRS, the channel busy rate (CBR) value in resource pool A and / or resource pool B, the delay requirement for SL PRS transmission, the periodic / repeated transmission frequency of the SL PRS, the feedback-based retransmission of the received SL PRS, etc.

[0406] For example, the above operation may be limited to a case where the resource pool B is (pre-) configured to allow random resource selection.

[0407] For example, the SCI transmission resources from resource pool A and the SL PRS transmission resources from resource pool B may be randomly selected.

[0408] For example, if SL PRS transmission resources are randomly selected from resource pool B, SCI transmission resources associated with SL PRS may also be randomly selected from resource pool A.

[0409] For example, the above operations can be determined based on the priority associated with the SL PRS, the channel busy rate (CBR) value in resource pool A and / or resource pool B, the latency requirement for SL PRS transmission, the periodic / repeated transmission frequency of the SL PRS and / or the feedback-based retransmission of the received SLPRS.

[0410] For example, the above operation may be limited to a case where the resource pool A and the resource pool B are configured (in advance) to allow random resource selection.

[0411] For example, if a one-to-one correspondence between the position of the SCI resources in resource pool A in the time domain / frequency domain and the position of the SL PRS resources in resource pool B in the time domain / frequency domain is (pre-) configured or defined, the SCI transmission resources in resource pool A can be randomly selected based on the one-to-one correspondence and / or the SL PRS transmission resources in resource pool B can be selected in relation to the SCI transmission resources.

[0412] According to various embodiments of the present disclosure, when the resource pool for sending SL PRS for SL locations is different from the resource pool for transmission of channels / signals related to SLPRS, an efficient method for randomly selecting transmission resources for transmission of SLPRS and associated channels / signals can be proposed.

[0413] Figure 17 1 is a diagram for explaining a problem in a method of performing wireless communication related to positioning according to an embodiment of the present disclosure. Figure 17 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0414] Reference Figure 17 According to one embodiment of the present disclosure, for example, the target UE may be a terminal supporting UE / Secure User Plane Location (SUPL) (SUPL) SET (SUPL-supported terminal) being positioned. For example, at least one anchor UE / server UE / positioning server (e.g., a base station, a Location Management Function (LMF), a Transmit-Receive Point (TRP), an Enhanced Serving Mobile Location Center (E-SMLC), a Secure User Plane Location (SUPL) SLP (SULP Positioning Platform), etc.) may be a physical entity or logical entity that assists, requests, or manages positioning for the target UE.

[0415] For example, the target UE and / or the server UE may obtain information related to the (SL) PRS (e.g., from a base station, from a (pre-) configuration of the target UE / server UE). For example, the information related to the SL PRS may include at least one of the following: information related to a sidelink positioning reference signal (SL) PRS resource identifier, 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.

[0416] For example, a SL positioning group may be formed between the target UE and the server UE.

[0417] For example, the UE may be configured with one or more resource pools. For example, the resource pool may be used for transmission / reception of PSSCH / PSCCH and / or transmission / reception of SL PRS. For example, the resource pool may be associated with resource allocation mode 1 or resource allocation mode 2. For example, a resource selection (allocation) method may be selected (determined / configured) (enabled) with respect to resources in the resource pool. For example, the resource selection (allocation) method for resources in the resource pool may include at least one of full sensing, (periodic / continuous) partial sensing, and / or (no sensing) random selection.

[0418] For example, SL positioning (e.g., TDOA (e.g., UL-TDOA) / RTT / bilateral RTT positioning) with respect to the target UE may be performed. For example, based on the mode 2 resource allocation mode, the target UE may self-select resources for the SL PRS within the resource pool. For example, based on the mode 2 resource allocation mode, the target UE may self-select resources for the PSSCH / PSCCH within the resource pool. For example, the target UE may trigger a resource (re)selection process within time slot n. For example, the target UE may (self)select resources for the SL PRS within the resource pool within a selection window based on (selected / configured) sensing. For example, the sensing may include at least one of full sensing, (periodic / continuous based) partial sensing, and / or (no sensing) random selection.

[0419] For example, sensing may be performed via RSRP measurement performed based on control information (eg, SCI) received via PSCCH / PSSCH regarding the SL PRS. For example, PSCCH / PSSCH may be received based on resources within a resource pool.

[0420] For example, the transmission resources for SL PRS can be selected by the upper layer from the candidate resources in the resource pool, wherein the final at least one candidate resource (a subset of candidate resources) is selected within the selection window based on sensing. For example, the transmission resources for PSSCH / PSCCH can be selected by the upper layer from the final at least one candidate resource (a subset of candidate resources) selected from the candidate resources in the resource pool within the selection window based on the above-mentioned sensing. For example, the target UE can send information (e.g., SCI) about the transmission resources (e.g., reserved resources) for SL PRS to the server UE via the selected PSSCH / PSCCH resources. For example, the target UE can send SL PRS to the server UE based on the selected transmission resources for SL PRS.

[0421] For example, SL positioning with respect to the target UE may be performed based on the SL PRS (eg, a transmission time of the SL PRS, a reception time of the SL PRS).

[0422] Therefore, according to one embodiment of the present disclosure, for example, the resource selection (sensing) mechanism for the transmission resources regarding SL PRS and the transmission resources regarding PSSCH / PSCCH can be selected / configured identically or independently of each other. For example, the transmission resources for SL PRS and the transmission resources for PSSCH / PSCCH can be selected / configured identically or independently of each other. For example, if both the SL PRS transmission resources and the PSSCH / PSCCH transmission resources are selected based on random selection, conflicts between the selected transmission resources may frequently occur. For example, due to the above-mentioned resource conflict problem, the SL PRS may not be correctly sent or received. In contrast, if both the SL PRS transmission resources and the PSSCH / PSCCH transmission resources are selected based on (identical) full sensing, for example, differences in latency, priority, etc. may not be taken into account, and therefore the requirements of any of the corresponding service requirements may not be met. Therefore, for example, SL positioning (e.g., TDOA / RTT / bilateral RTT) positioning based on SL PRS may not be performed correctly.

[0423] Figure 18 is a diagram for explaining a process for performing wireless communication related to positioning according to an embodiment of the present disclosure. Figure 18 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0424] Reference Figure 18 According to one embodiment of the present disclosure, for example, the target UE may be a UE / SUPL (Secure User Plane Location) SET (SUPL-capable terminal) that is being positioned. For example, at least one anchor UE / server UE / positioning server (e.g., a base station, a Location Management Function (LMF), a Transmit-Receive Point (TRP), an Enhanced Serving Mobile Location Center (E-SMLC), a Secure User Plane Location (SUPL) SLP (SULP Positioning Platform), etc.) may be a physical entity or logical entity that assists, requests, or manages positioning for the target UE.

[0425] For example, the target UE and / or the server UE may obtain information related to the (SL)PRS configuration.

[0426] For example, a SL positioning group may be formed between the target UE and the server UE.

[0427] For example, a UE may be configured with one or more resource pools. For example, a resource pool may be configured for transmission / reception of PSSCH / PSCCH and / or transmission / reception of SL PRS. For example, a resource pool may include a first resource pool that may be used for transmission of both SL PRS and PSSCH / PSCCH. For example, a resource pool may include a second resource pool that may be used for transmission of SL PRS but not for transmission of PSSCH / PSCCH. For example, a resource pool may be associated with resource allocation mode 1 or resource allocation mode 2.

[0428] For example, the UE may obtain at least one of first information related to the transmission / reception of SCI (PSSCH / PSCCH) within the first resource pool or second information related to the transmission / reception of SL PRS within the second resource pool. For example, based on at least one of the first information or the second information, the UE may obtain at least one of information about a first resource selection mechanism for transmitting / receiving SCI (PSSCH / PSCCH) or information about a second resource selection mechanism for transmitting / receiving SL PRS. For example, the resource selection mechanism may include at least one of full sensing, partial sensing (based on periodicity / continuousness) and / or random selection (no sensing). For example, based on the first information or the second information, the UE may obtain configuration information about full sensing / partial sensing for SCI transmission / reception or configuration information about random selection for SL PRS transmission / reception.

[0429] For example, based on the first information or the second information, the UE can obtain at least one of information about the first resource for transmitting / receiving SCI (PSSCH / PSCCH) or information about the second resource for transmitting / receiving SL PRS. For example, based on the first information or the second information, the UE can obtain at least one of information about the first resource for transmitting / receiving SCI or information about the second resource related to the first resource. For example, based on the first information or the second information, the UE can obtain at least one of information about the second resource for transmitting / receiving SL PRS or information about the first resource related to the second resource.

[0430] For example, SL positioning (e.g., TDOA (e.g., UL-TDOA) / RTT / bilateral RTT positioning) with respect to the target UE may be performed. For example, based on the mode 2 resource allocation mode, the target UE may (self) select resources for the SL PRS within the first resource pool. For example, the target UE may trigger a resource (re)selection process within time slot n1. For example, the target UE may (self) select resources for the SL PRS from the first resource pool and within a selection window based on the first resource selection mechanism. For example, the target UE may (self) select resources for the SL PRS from the first resource pool and within a selection window based on the second resource.

[0431] 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 process in time slot n2. For example, the target UE may self-select resources for SCI transmission (PSSCH / PSCCH) in the second resource pool and within a selection window based on the second resource selection mechanism. For example, the target UE may (self) select resources for SL PRS from the second resource pool and within a selection window based on the first resources.

[0432] For example, the target UE may send information (eg, SCI) about transmission resources (eg, reserved resources) for SLPRS to the server UE via the selected PSSCH / PSCCH resources. For example, the target UE may send SL PRS to the server UE based on the selected transmission resources for SL PRS.

[0433] For example, SL positioning with respect to the target UE may be performed based on the SL PRS (eg, a transmission time of the SL PRS, a reception time of the SL PRS).

[0434] For example, the first device and / or the second device may perform SL positioning based on the SCI and / or SL PRS (transmission / reception time of the SL PRS).

[0435] Therefore, according to one embodiment of the present disclosure, for example, the resource selection (sensing) mechanism for transmission resources regarding SL PRS and transmission resources regarding PSSCH / PSCCH can be selected / configured differently or in relation to each other. For example, the transmission resources for SL PRS and the transmission resources for PSSCH / PSCCH can be selected / configured differently or in relation to each other. For example, if SL PRS transmission resources / PSSCH / PSCCH transmission resources are selected based on random selection / sensing (complete sensing, partial sensing, etc.), the performance degradation due to resource acquisition for SL PRS may be less than that for PSSCH / PSCCH, and thus the conflict between the selected transmission resources can be reduced. For example, by avoiding the above-mentioned resource conflict problem, SL PRS can be correctly sent and received. For example, if SL PRS transmission resources / PSSCH / PSCCH transmission resources are selected based on random selection / sensing (complete sensing, partial sensing, etc.), the differences in latency, priority, etc. are taken into account, so that all service requirements of each of them can be met. Therefore, for example, the performance of SL positioning (e.g., TDOA / RTT / bilateral RTT) positioning based on SL PRS can be improved.

[0436] For example, parameter values ​​related to the application or non-application of the above-mentioned rules and / or the proposed methods / rules of the present disclosure may be specifically configured / allowed with respect to service types (either differently or independently). For example, parameter values ​​related to the application or non-application of the above-mentioned rules and / or the proposed methods / rules of the present disclosure may be specifically configured / allowed with respect to (LCH or service) priority (either differently or independently). For example, parameter values ​​related to the application or non-application of the above-mentioned rules and / or the proposed methods / rules of the present disclosure may be specifically configured / allowed with respect to QoS requirements (e.g., latency, reliability, minimum communication range) (either differently or independently). For example, parameter values ​​related to the application or non-application of the above-mentioned rules and / or the proposed methods / rules of the present disclosure may be specifically configured / allowed with respect to PQI parameters (either differently or independently). For example, parameter values ​​related to the application or non-application of the above-mentioned rules and / or the proposed methods / rules of the present disclosure may be specifically configured / allowed with respect to HARQ feedback ENABLED LCH / MAC PDU (transmission) (either differently or independently). For example, parameter values ​​related to the application or non-application of the above-mentioned rules and / or the proposed methods / rules of the present disclosure may be specifically configured / allowed (either differently or independently) with respect to HARQ feedback DISABLED LCH / MAC PDU (transmission). For example, parameter values ​​related to the application or non-application of the above-mentioned rules and / or the proposed methods / rules of the present disclosure may be specifically configured / allowed (either differently or independently) with respect to the CBR measurement value of the resource pool. For example, parameter values ​​related to the application or non-application of the above-mentioned rules and / or the proposed methods / rules of the present disclosure may be specifically configured / allowed (either differently or independently) with respect to the SL broadcast type (e.g., unicast, multicast, broadcast). For example, parameter values ​​related to the application or non-application of the above-mentioned rules and / or the proposed methods / rules of the present disclosure may be specifically configured / allowed (either differently or independently) with respect to the SL multicast HARQ feedback options (e.g., NACK-only feedback, ACK / NACK feedback, NACK-only feedback based on TX-RX range). For example, parameter values ​​related to the application or non-application of the above-mentioned rules and / or related to the proposed methods / rules of the present disclosure may be specifically configured / allowed with respect to the SL mode 1CG type (e.g., SL CG type 1 or SL CG type 2) (either differently or independently). For example, parameter values ​​related to the application or non-application of the above-mentioned rules and / or related to the proposed methods / rules of the present disclosure may be specifically configured / allowed with respect to the SL mode type (e.g., mode 1 or mode 2) (either differently or independently). For example, parameter values ​​related to the application or non-application of the above-mentioned rules and / or related to the proposed methods / rules of the present disclosure may be specifically configured / allowed with respect to the resource pool (either differently or independently).For example, parameter values ​​related to the application or non-application of the above-mentioned rules and / or the proposed methods / rules of the present disclosure may be specifically configured / allowed with respect to whether the resource pool is configured with PSFCH resources (either differently or independently). For example, parameter values ​​related to the application or non-application of the above-mentioned rules and / or the proposed methods / rules of the present disclosure may be specifically configured / allowed with respect to the source (L2) ID (either differently or independently). For example, parameter values ​​related to the application or non-application of the above-mentioned rules and / or the proposed methods / rules of the present disclosure may be specifically configured / allowed with respect to the destination (L2) ID (either differently or independently). For example, parameter values ​​related to the application or non-application of the above-mentioned rules and / or the proposed methods / rules of the present disclosure may be specifically configured / allowed with respect to the PC5 RRC connection link (either differently or independently). For example, parameter values ​​related to the application or non-application of the above-mentioned rules and / or the proposed methods / rules of the present disclosure may be specifically configured / allowed with respect to the SL link (either differently or independently). For example, parameter values ​​related to the application or non-application of the above-mentioned rules and / or the proposed methods / rules of the present disclosure may be specifically configured / allowed (or differently or independently) with respect to a connection state (with a base station) (e.g., an RRC connection state, an idle state, an inactive state). For example, parameter values ​​related to the application or non-application of the above-mentioned rules and / or the proposed methods / rules of the present disclosure may be specifically configured / allowed (or differently or independently) with respect to a SL HARQ process (ID). For example, parameter values ​​related to the application or non-application of the above-mentioned rules and / or the proposed methods / rules of the present disclosure may be specifically configured / allowed (or differently or independently) with respect to the execution or non-execution of a SL DRX operation (of a TX UE or an RX UE). For example, parameter values ​​related to the application or non-application of the above-mentioned rules and / or the proposed methods / rules of the present disclosure may be specifically configured / allowed (or differently or independently) with respect to whether the (TX or RX) UE is a power saving UE. For example, parameter values ​​related to the application or non-application of the above-mentioned rules and / or the proposed methods / rules of the present disclosure may be specifically configured / allowed (or differently or independently) for the case where PSFCH TX and PSFCH RX (and / or multiple PSFCH TX (exceeding UE capabilities)) overlap (from the perspective of a specific UE). For example, parameter values ​​related to the application or non-application of the above-mentioned rules and / or the proposed methods / rules of the present disclosure may be specifically configured / allowed (or differently or independently) for the case where the RX UE has actually received a (successful) PSCCH (and / or PSSCH (re)transmission from the TX UE.

[0437] For example, in the present disclosure, the wording for configuration (or specification) can be interpreted in an expanded manner as a form of notification (or announcement) by the base station to the UE through a predefined (physical layer or higher layer) channel / signal (e.g., SIB, RRC, MAC CE) (and / or a form of notification (or announcement) by the UE to another UE through a predefined (physical layer or higher layer) channel / signal (e.g., SL MAC CE, PC5 RRC)).

[0438] For example, in the present disclosure, the wording for PSFCH can be interpreted in an expanded manner as (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 methods proposed in the present disclosure can be used in an expanded manner by being combined with each other (to form new types of methods).

[0439] For example, in the present disclosure, a specific threshold value may be predefined, or may refer to a threshold value (pre) configured by a higher layer (including an application layer) of a network, a base station, or a UE. For example, in the present disclosure, a specific configuration value may be predefined, or may refer to a value (pre) configured by a higher layer (including an application layer) of a network, a base station, or a UE. For example, an operation configured by the network / base station may refer to an operation that is (pre) configured by the base station to the UE via higher layer signaling, or configured / signaled by the base station to the UE via a MAC CE, or signaled by the base station to the UE via a DCI.

[0440] Figure 19 A method for performing wireless communication by a first device according to an embodiment of the present disclosure is shown. Figure 19 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0441] Reference Figure 19 According to an embodiment of the present disclosure, in step S1910, for example, the first device may obtain information related to the transmission of a phase tracking reference signal (PT-RS). For example, in step S1920, the first device may obtain information related to an SL (sidelink) PRS (positioning reference signal), and the information related to the SL PRS includes at least one of information related to an SL PRS resource ID (identifier), 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, in step S1930, the first device may perform SL PRS transmission based on the information related to the SL PRS. For example, PT-RS transmission may be canceled in a symbol in which the SL PRS is transmitted.

[0442] Additionally or alternatively, PT-RS transmission may be canceled based on the SL PRS transmission and PT-RS transmission overlapping in a symbol in which the SL PRS is transmitted.

[0443] Additionally or alternatively, information related to the SL resource pool may be obtained.

[0444] Additionally or alternatively, PT-RS transmission may be suppressed (i) in the SL resource pool and (ii) in symbols in which SL PRS is transmitted.

[0445] Additionally or alternatively, the SL resource pool may include a shared resource pool that may be used for SL PRS transmission and transmission of a physical sidelink shared channel (PSSCH).

[0446] Additionally or alternatively, information related to the SL resource pool may be obtained.

[0447] Additionally or alternatively, (i) based on performing SL PRS transmission on SL PRS resources in the SL resource pool, and (ii) based on performing PT-RS transmission on SL PRS resources in the SL resource pool, PT-RS transmission can be canceled. Additionally or alternatively, (i) in the symbol in which the SL PRS is transmitted, and (ii) in the frequency domain in which the SL PRS is transmitted, PT-RS transmission can be canceled.

[0448] Additionally or alternatively, the information related to PT-RS transmission may include information related to a frequency domain regarding PT-RS transmission.

[0449] Additionally or alternatively, the frequency domain may include a frequency domain within a frequency range of 24250 MHz or greater.

[0450] Additionally or alternatively, PT-RS transmission may be performed in resources used for a physical sidelink shared channel (PSSCH).Additionally or alternatively, SL PRS resources for SL PRS may be configured not to overlap with physical sidelink shared channel (PSSCH) resources.

[0451] Additionally or alternatively, a received signal strength indicator (RSSI) threshold for measuring a channel busy rate (CBR) with respect to the SL PRS may be related to an RSSI threshold for measuring CBR with respect to a physical sidelink shared channel (PSSCH).

[0452] Additionally or alternatively, the control information is sent via a control channel.

[0453] Additionally or alternatively, the control information may include information for identifying a SL PRS resource regarding the SL PRS.

[0454] Additionally or alternatively, the first sidelink control information (SCI) may be transmitted via a physical sidelink control channel (PSCCH).

[0455] Additionally or alternatively, the first SCI may include information about reserved SL resources.

[0456] Additionally or alternatively, second sidelink control information (SCI) may be transmitted through a physical sidelink shared channel (PSSCH).

[0457] Additionally or alternatively, the second SCI may include index information about reserved SL resources.

[0458] Additionally or alternatively, information related to the SL resource pool may be obtained.

[0459] Additionally or alternatively, based on the configuration of physical sidelink feedback channel (PSFCH) resources in the SL resource pool, the period of the PSFCH resources may be related to the period of the SL PRS. According to one embodiment of the present disclosure, the quality of positioning services may be improved, for example, by resolving the technical problem of temporal overlap of PT-RS and SL PRS to compensate for the phase error (phase noise) at the transmitter. For example, when the PT-RS and SL PRS for correcting the phase error (phase noise) at the transmitter overlap in time, positioning accuracy may be improved by reducing the priority of PT-RS to SL PRS.

[0460] For example, the first device may obtain first information related to SCI transmission in the first resource pool and / or second information related to SL PRS transmission in the second resource pool. For example, the first resource pool may include a shared resource pool that can be used for transmission of both SL PRS and PSSCH / PSCCH. For example, the second resource pool may include a dedicated resource pool that can be used for transmission of SL PRS but not for transmission of PSSCH / PSCCH.

[0461] For example, based on at least one of the first information or the second information, the first device may obtain at least one of information about a first resource selection mechanism for SCI transmission or information about a second resource selection mechanism for SL PRS transmission. For example, the first resource selection mechanism and / or the second resource selection mechanism may include at least one of full sensing, (periodic / continuous) partial sensing, and / or (no sensing) random selection.

[0462] For example, the first device may select resources for PSSCH / PSCCH based on a first resource selection mechanism.

[0463] For example, the first device may select resources related to the SL PRS based on the second resource selection mechanism.

[0464] For example, the first device may send a first SCI / a second SCI based on resources for PSCCH / PSSCH.

[0465] For example, the first device may send the SL PRS based on the resources for the SL PRS.

[0466] The proposed method can be applied to devices according to various embodiments of the present disclosure. First, one or more memories 104 of the first device 100 can store instructions based on execution by one or more processors 102 to enable the first device (e.g., one or more processors 102, one or more transceivers 106) to perform operations. For example, the operations may include: obtaining information related to phase tracking reference signal (PT-RS) transmission; obtaining information related to SL (sidelink) PRS (positioning reference signal), the information related to SL PRS including at least one of information related to SL PRS resource ID (identifier), information related to SL PRS comb offset, information related to SL PRS comb size, information related to SL PRS start symbol, or information related to the number of SLPRS symbols; and performing SL PRS transmission based on the information related to SL PRS, wherein PT-RS transmission is canceled in the symbol in which SL PRS is transmitted.

[0467] According to an embodiment of the present disclosure, a first device adapted to perform wireless communication may be proposed. For example, the first device may include one or more processors; one or more transceivers; and one or more memories connected to the one or more processors and storing instructions, the instructions causing the one or more processors to perform operations based on being executed. For example, the operations include at least one of the following: obtaining information related to phase tracking reference signal (PT-RS) transmission; obtaining information related to SL (side link) PRS (positioning reference signal), the information related to SL PRS including at least one of information related to SL PRS resource ID (identifier), information related to SL PRS comb offset, information related to SL PRS comb size, information related to SLPRS start symbol, or information related to the number of SL PRS symbols; and performing SL PRS transmission based on the information related to SLPRS, wherein PT-RS transmission is canceled in the symbol in which SL PRS is transmitted.

[0468] According to an embodiment of the present disclosure, a processing device adapted to control a first device may be proposed. For example, the processing device may include: one or more processors; and one or more memories, the one or more memories being operatively connectable to the one or more processors and storing instructions that, upon being executed, cause the one or more processors to perform operations. For example, the operations may include at least one of the following: obtaining information related to phase tracking reference signal (PT-RS) transmission; obtaining information related to SL (sidelink) PRS (positioning reference signal), the information related to SL PRS including at least one of information related to SL PRS resource ID (identifier), information related to SL PRS comb offset, information related to SL PRS comb size, information related to SL PRS start symbol, or information related to the number of SL PRS symbols; and performing SL PRS transmission based on the information related to SL PRS, wherein PT-RS transmission is canceled in the symbol in which SL PRS is transmitted.

[0469] According to an embodiment of the present disclosure, at least one non-transitory computer-readable storage medium storing instructions may be proposed. For example, the instructions cause a first device to perform an operation based on being executed by at least one processor. For example, the operation may include at least one of the following: obtaining information related to phase tracking reference signal (PT-RS) transmission; obtaining information related to SL (side link) PRS (positioning reference signal), the information related to SL PRS including at least one of information related to SL PRS resource ID (identifier), information related to SL PRS comb offset, information related to SL PRS comb size, information related to SL PRS start symbol, or information related to the number of SL PRS symbols; and performing SL PRS transmission based on the information related to SL PRS, wherein PT-RS transmission is canceled in the symbol in which SL PRS is transmitted.

[0470] Figure 20 A method for performing wireless communication by a second device according to an embodiment of the present disclosure is shown. Figure 20 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0471] Reference Figure 20According to an embodiment of the present disclosure, in step S2010, for example, the second device may obtain information related to phase tracking reference signal (PT-RS) reception. In step S2020, for example, the second device may obtain information related to SL (sidelink) PRS (positioning reference signal), and the information related to SL PRS includes at least one of information related to SL PRS resource ID (identifier), information related to SL PRS comb offset, information related to SL PRS comb size, information related to SL PRS start symbol, or information related to the number of SL PRS symbols. For example, in step S2030, the second device may perform SL PRS reception based on the information related to SL PRS. For example, PT-RS reception may be canceled in the symbol receiving the SL PRS.

[0472] Additionally or alternatively, PT-RS transmission may be canceled based on the SL PRS transmission and PT-RS transmission overlapping in a symbol in which the SL PRS is transmitted.

[0473] Additionally or alternatively, information related to the SL resource pool may be obtained.

[0474] Additionally or alternatively, PT-RS transmission may be suppressed (i) in the SL resource pool, and (ii) in symbols in which SL PRS is transmitted.

[0475] Additionally or alternatively, the SL resource pool may include a shared resource pool that may be used for SL PRS transmission and transmission of a physical sidelink shared channel (PSSCH).

[0476] Additionally or alternatively, information related to the SL resource pool may be obtained.

[0477] Additionally or alternatively, (i) based on performing SL PRS transmission on SL PRS resources in the SL resource pool, and (ii) based on performing PT-RS transmission on SL PRS resources in the SL resource pool, PT-RS transmission can be canceled. Additionally or alternatively, (i) in the symbol in which the SL PRS is transmitted, and (ii) in the frequency domain in which the SL PRS is transmitted, PT-RS transmission can be canceled.

[0478] Additionally or alternatively, the information related to PT-RS transmission may include information related to a frequency domain regarding PT-RS transmission.

[0479] Additionally or alternatively, the frequency domain may include a frequency domain within a frequency range of 24250 MHz or greater.

[0480] Additionally or alternatively, PT-RS transmission may be performed in resources used for a physical sidelink shared channel (PSSCH).Additionally or alternatively, SL PRS resources for SL PRS may be configured not to overlap with physical sidelink shared channel (PSSCH) resources.

[0481] Additionally or alternatively, a received signal strength indicator (RSSI) threshold for measuring a channel busy rate (CBR) with respect to the SL PRS may be related to an RSSI threshold for measuring CBR with respect to a physical sidelink shared channel (PSSCH).

[0482] Additionally or alternatively, the control information is sent via a control channel.

[0483] Additionally or alternatively, the control information may include information for identifying a SL PRS resource regarding the SL PRS.

[0484] Additionally or alternatively, the first sidelink control information (SCI) may be transmitted via a physical sidelink control channel (PSCCH).

[0485] Additionally or alternatively, the first SCI may include information about reserved SL resources.

[0486] Additionally or alternatively, second sidelink control information (SCI) may be transmitted through a physical sidelink shared channel (PSSCH).

[0487] Additionally or alternatively, the second SCI may include index information about reserved SL resources.

[0488] Additionally or alternatively, information related to the SL resource pool may be obtained.

[0489] Additionally or alternatively, based on the configuration of physical sidelink feedback channel (PSFCH) resources in the SL resource pool, the period of the PSFCH resources may be related to the period of the SL PRS. The proposed method may be applied to devices according to various embodiments of the present disclosure. First, one or more memories 204 of the second device 200 may store instructions based on execution by one or more processors 202 to enable the second device (e.g., one or more processors 202, one or more transceivers 206) to perform operations. For example, the operations may include: obtaining information related to phase tracking reference signal (PT-RS) reception; obtaining information related to SL (sidelink) PRS (positioning reference signal), the information related to SL PRS including at least one of information related to SL PRS resource ID (identifier), information related to SL PRS comb offset, information related to SL PRS comb size, information related to SLPRS start symbol, or information related to the number of SL PRS symbols; and performing SL PRS reception based on the information related to SLPRS, wherein PT-RS reception is canceled in the symbols receiving the SL PRS.

[0490] According to an embodiment of the present disclosure, a second device adapted to perform wireless communication may be proposed. For example, the second device may include one or more processors; one or more transceivers; and one or more memories connected to the one or more processors and storing instructions, the instructions causing the one or more processors to perform operations based on being executed. For example, the operations include at least one of the following: obtaining information related to phase tracking reference signal (PT-RS) reception; obtaining information related to SL (side link) PRS (positioning reference signal), the information related to SL PRS including at least one of information related to SL PRS resource ID (identifier), information related to SL PRS comb offset, information related to SL PRS comb size, information related to SLPRS start symbol, or information related to the number of SL PRS symbols; and performing SL PRS reception based on the information related to SLPRS, wherein PT-RS reception is canceled in the symbol of the received SL PRS.

[0491] According to an embodiment of the present disclosure, a processing device adapted to control a second device may be proposed. For example, the processing device may include: one or more processors; and one or more memories, the one or more memories being connected to the one or more processors and storing instructions, which instructions, based on being executed, cause the one or more processors to perform operations. For example, the operations may include at least one of the following: obtaining information related to phase tracking reference signal (PT-RS) reception; obtaining information related to SL (sidelink) PRS (positioning reference signal), the information related to SL PRS including at least one of information related to SL PRS resource ID (identifier), information related to SL PRS comb offset, information related to SL PRS comb size, information related to SL PRS start symbol, or information related to the number of SL PRS symbols; and performing SL PRS reception based on the information related to SL PRS, wherein PT-RS reception is canceled in the symbol of the received SL PRS.

[0492] According to an embodiment of the present disclosure, at least one non-transitory computer-readable storage medium storing instructions may be proposed. For example, the instructions cause a second device to perform an operation based on being executed by at least one processor. For example, the operation may include at least one of the following: obtaining information related to phase tracking reference signal (PT-RS) reception; obtaining information related to SL (side link) PRS (positioning reference signal), the information related to SL PRS including at least one of information related to SL PRS resource ID (identifier), information related to SL PRS comb offset, information related to SL PRS comb size, information related to SL PRS start symbol, or information related to the number of SL PRS symbols; and performing SL PRS reception based on the information related to SL PRS, wherein PT-RS reception is canceled in the symbol of the received SL PRS.

[0493] Various embodiments of the present disclosure may be combined with each other.

[0494] Hereinafter, devices to which various embodiments of the present disclosure can be applied will be described.

[0495] The various descriptions, functions, processes, proposals, methods and / or operational flows of the present disclosure described herein may be applied to, but not limited to, various fields requiring wireless communication / connection between devices (e.g., 5G).

[0496] Hereinafter, a more detailed description will be given with reference to the accompanying drawings. In the following drawings / descriptions, unless otherwise described, the same reference numerals may represent the same or corresponding hardware blocks, software blocks or functional blocks.

[0497] Figure 21A communication system 1 according to an embodiment of the present disclosure is shown. Figure 21 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0498] Reference Figure 21 , a communication system 1 to which various embodiments of the present disclosure are applied includes a wireless device, a base station (BS), and a network. Herein, a wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G New RAT (NR) or Long Term Evolution (LTE)), and may be referred to as a communication / radio / 5G device. The wireless device may include, but is not limited to, a robot 100a, a vehicle (100b-1, 100b-2), an extended reality (XR) device 100c, a handheld device 100d, a home appliance 100e, an Internet of Things (IoT) device 100f, and an artificial intelligence (AI) device / server 400. For example, a vehicle may include a vehicle with a wireless communication function, an autonomous vehicle, and a vehicle capable of performing inter-vehicle communication. Herein, a vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone) and / or an AV (aircraft) (e.g., AAM (Advanced Air Mobility)). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices and may be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) installed in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance device, a digital signage, a vehicle, a robot, etc. Handheld devices may include smartphones, smart pads, wearable devices (e.g., smart watches or smart glasses), and computers (e.g., notebooks). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors and smart meters. For example, a BS and a network may be implemented as wireless devices, and a specific wireless device 200a may operate as a BS / network node relative to other wireless devices.

[0499] Here, in addition to LTE, NR, and 6G, the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may also include narrowband IoT for low-power communication. In this case, for example, NB-IoT technology may be an example of low-power wide area network (LPWAN) technology and may be implemented as standards such as LTE Cat NB1 and / or LTE Cat NB2, without being limited to the above names. Additionally or alternatively, the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may perform communication based on LTE-M technology. In this case, as an example, LTE-M technology may be an example of LPWAN and may be referred to by various names including enhanced machine type communication (eMTC). For example, LTE-M technology may be implemented as at least any one of various standards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-bandwidth limited (non-BL), 5) LTE-MTC, 6) LTE machine type communication, and / or 7) LTE M, without being limited to the above names. Additionally or alternatively, the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may include at least one of Bluetooth, a low-power wide area network (LPWAN), and ZigBee considering low-power communication, and is not limited to the above names. As an example, ZigBee technology can generate a personal area network (PAN) related to low / low-power digital communication based on various standards including IEEE 802.15.4, and may be referred to by various names.

[0500] Wireless devices 100a to 100f can be connected to a network 300 via a BS 200. AI technology can be applied to wireless devices 100a to 100f, and wireless devices 100a to 100f can be connected to an AI server 400 via the network 300. The network 300 can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although wireless devices 100a to 100f can communicate with each other via the BS 200 / network 300, wireless devices 100a to 100f can perform direct communication (e.g., sidelink communication) with each other without going through the BS / network. For example, vehicles 100b-1 and 100b-2 can perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0501] Wireless communication / connection 150a, 150b, or 150c may be established between wireless devices 100a to 100f / BS 200 or BS 200 / BS 200. Here, the wireless communication / connection may be established via various RATs (e.g., 5G NR), such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication), or inter-BS communication (e.g., relay, integrated access backhaul (IAB)). The wireless device and the BS / wireless device may transmit / receive radio signals to / from each other via the wireless communication / connections 150a and 150b. For example, the wireless communication / connections 150a and 150b may transmit / receive signals via various physical channels. To this end, various configuration information configuration processes, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and at least a portion of the resource allocation process for transmitting / receiving radio signals may be performed based on various proposals of the present disclosure.

[0502] Figure 22 A wireless device according to an embodiment of the present disclosure is shown. Figure 22 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0503] Reference Figure 22 , the first wireless device 100 and the second wireless device 200 can transmit radio signals through various RATs (e.g., LTE and NR). Herein, {the first wireless device 100 and the second wireless device 200} may correspond to Figure 21 {wireless device 100x and BS 200} and / or {wireless device 100x and wireless device 100x} in.

[0504] The first wireless device 100 may include 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(s) 102 may control the memory(s) 104 and / or the transceiver(s) 106, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed herein. For example, the processor(s) 102 may process information in the memory(s) 104 to generate first information / signals, and then transmit a radio signal including the first information / signals through the transceiver(s) 106. The processor(s) 102 may receive a radio signal including second information / signals through the transceiver 106, and then store information obtained by processing the second information / signals in the memory(s) 104. The memory(s) 104 may be connected to the processor(s) 102 and may store various information related to the operation of the processor(s) 102. For example, the memory(s) 104 may store software code including commands for executing part or all of the processing controlled by the processor(s) 102 or for performing the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed herein. Here, the processor(s) 102 and the memory(s) 104 may be part of a communication modem / circuitry / chip designed to implement a RAT (e.g., LTE or NR). The transceiver(s) 106 may be connected to the processor(s) 102 and transmit and / or receive radio signals via the antenna(s) 108. Each transceiver 106 may include a transmitter and / or a receiver. The transceiver(s) 106 may be interchangeably used with the radio frequency (RF) unit(s). In the present disclosure, a wireless device may represent a communication modem / circuitry / chip.

[0505] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and may also include one or more transceivers 206 and / or one or more antennas 208. The processor(s) 202 may control the memory(s) 204 and / or the transceiver(s) 206, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed herein. For example, the processor(s) 202 may process information in the memory(s) 204 to generate third information / signals, and then transmit a radio signal including the third information / signals through the transceiver(s) 206. The processor(s) 202 may receive a radio signal including fourth information / signals through the transceiver(s) 106, and then store information obtained by processing the fourth information / signals in the memory(s) 204. Memory(s) 204 may be connected to processor(s) 202 and may store various information related to the operation of processor(s) 202. For example, memory(s) 204 may store software code including commands for executing part or all of the processing controlled by processor(s) 202 or for performing the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed herein. Here, processor(s) 202 and memory(s) 204 may be part of a communication modem / circuitry / chip designed to implement a RAT (e.g., LTE or NR). Transceiver(s) 206 may be connected to processor(s) 202 and transmit and / or receive radio signals via antenna(s) 208. Each transceiver 206 may include a transmitter and / or a receiver. Transceiver(s) 206 may be used interchangeably with RF unit(s). In this disclosure, a wireless device may represent a communication modem / circuitry / chip.

[0506] The hardware elements of the wireless devices 100 and 200 will be described in more detail below. One or more protocol layers may be implemented by, but are not limited to, one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). One or more processors 102 and 202 may generate one or more protocol data units (PDUs) and / or one or more service data units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed herein. One or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operational flows disclosed herein. One or more processors 102 and 202 may generate a signal (e.g., a baseband signal) including a PDU, SDU, message, control information, data, or information according to the description, functions, procedures, proposals, methods, and / or operational procedures disclosed in this document, and provide the generated signal to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive a signal (e.g., a baseband signal) from one or more transceivers 106 and 206, and obtain the PDU, SDU, message, control information, data, or information according to the description, functions, procedures, proposals, methods, and / or operational procedures disclosed in this document.

[0507] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more application-specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field programmable gate arrays (FPGAs) may be included in one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204, thereby being driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods and / or operational flows disclosed in this document may be implemented using software or firmware in the form of codes, commands and / or command sets.

[0508] One or more memories 104 and 204 can be connected to one or more processors 102 and 202 and can store various types of data, signals, messages, information, programs, codes, instructions, and / or commands. One or more memories 104 and 204 can be composed of read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard drive, registers, cash memory, computer-readable storage media, and / or combinations thereof. One or more memories 104 and 204 can be located internally and / or externally to one or more processors 102 and 202. One or more memories 104 and 204 can be connected to one or more processors 102 and 202 via various technologies such as wired or wireless connections.

[0509] One or more transceivers 106 and 206 may transmit user data, control information, and / or radio signals / channels described in the methods and / or operational flows of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information, and / or radio signals / channels described in the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and may transmit and receive radio signals. For example, one or more processors 102 and 202 may control the one or more transceivers 106 and 206 to transmit user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may control the one or more transceivers 106 and 206 to receive user data, control information, or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to transmit and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document through one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received radio signals / channels, etc. from RF band signals to baseband signals so as to process the received user data, control information, radio signals / channels, etc. using one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc. processed using one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more of the transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0510] Figure 23 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown. Figure 23 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0511] Reference Figure 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. Figure 23 operations / functions, not limited to Figure 22The processor (102, 202) and / or transceiver (106, 206) of Figure 22 The processor (102, 202) and / or transceiver (106, 206) are implemented Figure 23 For example, you can Figure 22 Alternatively, the processor (102, 202) can implement blocks 1010 to 1060. Figure 22 The processor (102, 202) implements blocks 1010 to 1050 and can be implemented by Figure 22 The transceiver (106, 206) is used to implement block 1060.

[0512] Can be passed Figure 23 Signal processing circuit 1000 converts a codeword into a radio signal. Herein, a codeword is a coded bit sequence of an information block. An information block may include a transmission block (e.g., a UL-SCH transmission block, a DL-SCH transmission block). Radio signals may be transmitted via various physical channels (e.g., PUSCH and PDSCH).

[0513] Specifically, the codeword can be converted into a scrambled bit sequence by the scrambler 1010. The scrambling sequence for scrambling can be generated based on an initial value, and the initial value can include the ID information of the wireless device. The scrambled bit sequence can be modulated into a modulation symbol sequence by the modulator 1020. The modulation scheme may include pi / 2-binary phase shift keying (pi / 2-BPSK), m-phase shift keying (m-PSK), and m-quadrature amplitude modulation (m-QAM). The complex modulation symbol sequence can be mapped to one or more transmission layers by the layer mapper 1030. The modulation symbol of each transmission layer can be mapped (precoded) to (one or more) corresponding antenna ports by the precoder 1040. The output z of the precoder 1040 can be obtained by multiplying the output y of the layer mapper 1030 with the N*M precoding matrix W. Here, N is the number of antenna ports and M is the number of transmission layers. The precoder 1040 can perform precoding after performing transform precoding (e.g., DFT) on the complex modulation symbols. Alternatively, the precoder 1040 may perform precoding without performing transform precoding.

[0514] The resource mapper 1050 can map the modulation symbols of each antenna port to time-frequency resources. The time-frequency resources may include multiple symbols in the time domain (e.g., CP-OFDMA symbols and DFT-s-OFDMA symbols) and multiple subcarriers in the frequency domain. The signal generator 1060 can generate a radio signal from the mapped modulation symbols, and the generated radio signal can be sent to other devices through each antenna. To this end, the signal generator 1060 may include an inverse fast Fourier transform (IFFT) module, a cyclic prefix (CP) inserter, a digital-to-analog converter (DAC), and an up-converter.

[0515] Can Figure 23 The signal processing process for the signal received in the wireless device is configured in a manner opposite to the signal processing process (1010-1060) of the wireless device. Figure 22 100, 200) can receive a radio signal from the outside through an antenna port / transceiver. The received radio signal can be converted into a baseband signal by a signal restorer. To this end, the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a fast Fourier transform (FFT) module. Next, the baseband signal can be restored to a codeword through a resource demapping process, a post-coding process, a demodulation processor, and a descrambling process. The codeword can be restored to the original information block by decoding. Therefore, a signal processing circuit (not shown) for receiving a signal may include a signal restorer, a resource demapper, a post-coding process, a demodulator, a descrambler, and a decoder.

[0516] Figure 24 Another example of a wireless device according to an embodiment of the present disclosure is shown. The wireless device can be implemented in various forms according to use cases / services (see Figure 21 ). Figure 24 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0517] Reference Figure 24 , the wireless device (100, 200) may correspond to Figure 22 The wireless devices (100, 200) may be configured by various elements, components, units / portions and / or modules. For example, each of the wireless devices (100, 200) may include a communication unit 110, a control unit 120, a memory unit 130 and additional components 140. The communication unit may include a communication circuit 112 and (one or more) transceivers 114. For example, the communication circuit 112 may include Figure 22 One or more processors (102, 202) and / or one or more memories (104, 204). For example, the transceiver(s) 114 may include Figure 22The control unit 120 is electrically connected to the communication unit 110, the memory 130, and the additional components 140, and controls the overall operation of the wireless device. For example, the control unit 120 can control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit 130. The control unit 120 can transmit information stored in the memory unit 130 to the outside (e.g., other communication devices) via the communication unit 110 through a wireless / wired interface, or store information received from the outside (e.g., other communication devices) via the communication unit 110 through a wireless / wired interface in the memory unit 130.

[0518] The additional component 140 may be configured in various ways depending on the type of wireless device. For example, the additional component 140 may include at least one of a power unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device may be implemented in the following forms without limitation: a robot ( Figure 21 100a), vehicles ( Figure 21 100b-1 and 100b-2), XR devices ( Figure 21 100c), handheld device ( Figure 21 100d), household appliances ( Figure 21 100e), IoT devices ( Figure 21 100f), digital broadcasting terminal, hologram device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate / environmental device, AI server / device ( Figure 21 400), BS( Figure 21 200), network nodes, etc. Depending on the use case / service, the wireless device can be used in a mobile or fixed place.

[0519] exist Figure 24In the embodiment of the present invention, the various elements, components, units / parts and / or modules in the wireless device (100, 200) can all be connected to each other through a wired interface, or at least part of them can be connected wirelessly through the communication unit 110. For example, in each of the wireless devices (100, 200), the control unit 120 and the communication unit 110 can be connected through a wired interface, and the control unit 120 and the first unit (e.g., 130, 140) can be connected wirelessly through the communication unit 110. Each element, component, unit / part and / or module in the wireless device (100, 200) can also include one or more elements. For example, the control unit 120 can be constructed by a collection of one or more processors. As an example, the control unit 120 can be constructed by a collection of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing unit and a memory control processor. As another example, the memory 130 can be constructed by 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.

[0520] Hereinafter, the implementation will be described in detail with reference to the accompanying drawings. Figure 24 .

[0521] Figure 25 A handheld device according to an embodiment of the present disclosure is shown. The handheld device may include a smartphone, a smartpad, a wearable device (e.g., a smartwatch or smart glasses), or a portable computer (e.g., a notebook). The handheld device may be referred to as a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), an advanced mobile station (AMS), or a wireless terminal (WT). Figure 25 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0522] Reference Figure 25 , the handheld device 100 may include an antenna unit (108), a communication unit 110, a control unit 120, a memory unit 130, a power supply unit 140a, an interface unit 140b and an I / O unit 140c. The antenna unit 108 may be configured as a part of the communication unit 110. Blocks 110 to 130 / 140a to 140c correspond to Figure 24 Frame 110 to 130 / 140.

[0523] The communication unit 110 can send and receive signals (e.g., data signals and control signals) to and from other wireless devices or a base station. The control unit 120 can perform various operations by controlling the components of the handheld device 100. The control unit 120 may include an application processor (AP). The memory unit 130 can store data / parameters / programs / codes / commands required to operate the handheld device 100. The memory unit 130 can store input / output data / information. The power supply unit 140a can supply power to the handheld device 100 and may include wired / wireless charging circuits, a battery, etc. The interface unit 140b can support connection between the handheld device 100 and other external devices. The interface unit 140b may include various ports for connecting to external devices (e.g., an audio I / O port and a video I / O port). The I / O unit 140c can input or output user-input video information / signals, audio information / signals, data, and / or information. The I / O unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and / or a haptic module.

[0524] For example, in the case of data communication, the I / O unit 140c can obtain information / signals (e.g., touch, text, voice, image, or video) input by the user, and the obtained information / signals can be stored in the memory unit 130. The communication unit 110 can convert the information / signals stored in the memory into radio signals and transmit the converted radio signals directly to other wireless devices or to the BS. The communication unit 110 can receive radio signals from other wireless devices or BSs and then restore the received radio signals to the original information / signals. The restored information / signals can be stored in the memory unit 130 and can be output as various types (e.g., text, voice, image, video, or tactile) through the I / O unit 140.

[0525] Figure 26 A vehicle or autonomous vehicle according to an embodiment of the present disclosure is shown. The vehicle or autonomous vehicle can be implemented by a mobile robot, a car, a train, a manned / unmanned aerial vehicle (AV), a ship, etc. Figure 26 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0526] Reference Figure 26 , the vehicle or autonomous vehicle 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a drive unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 may be configured as part of the communication unit 110. Blocks 110 / 130 / 140a to 140d correspond to Figure 24 Box 110 / 130 / 140.

[0527] The communication unit 110 can send and receive signals (e.g., data signals and control signals) to and from external devices such as other vehicles, base stations (e.g., gNBs and roadside units), and servers. The control unit 120 can perform various operations by controlling components of the vehicle or autonomous vehicle 100. The control unit 120 may include an electronic control unit (ECU). The drive unit 140a can cause the vehicle or autonomous vehicle 100 to travel on the road. The drive unit 140a may include an engine, a motor, a transmission system, wheels, brakes, a steering system, etc. The power supply unit 140b can supply power to the vehicle or autonomous vehicle 100 and may include wired / wireless charging circuits, a battery, etc. The sensor unit 140c can acquire vehicle status, external environment information, user information, etc. The sensor unit 140c may include an inertial measurement unit (IMU), a collision sensor, a wheel sensor, a speed sensor, a slope sensor, a weight sensor, a heading sensor, a location module, a vehicle forward / backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, a lighting sensor, a pedal position sensor, etc. The autonomous driving unit 140d can implement technology for maintaining the lane in which the vehicle is traveling, technology for automatically adjusting the speed (for example, adaptive cruise control), technology for autonomously driving along a determined path, technology for driving by automatically setting a path with a destination set, etc.

[0528] For example, the communication unit 110 can receive map data, traffic information data, etc. from an external server. The autonomous driving unit 140d can generate an autonomous driving path and driving plan based on the acquired data. The control unit 120 can control the drive unit 140a so that the vehicle or autonomous vehicle 100 can move along the autonomous driving path according to the driving plan (e.g., speed / direction control). During autonomous driving, the communication unit 110 can aperiodically / periodically acquire the latest traffic information data from the external server and acquire surrounding traffic information data from neighboring vehicles. During autonomous driving, the sensor unit 140c can acquire vehicle status and / or surrounding environment information. The autonomous driving unit 140d can update the autonomous driving path and driving plan based on the newly acquired data / information. The communication unit 110 can transmit information about the vehicle's location, autonomous driving path, and / or driving plan to the external server. The external server can use AI technology, etc. based on the information collected from the vehicle or autonomous vehicle to predict traffic information data and provide the predicted traffic information data to the vehicle or autonomous vehicle.

[0529] The claims in this specification can be combined in various ways. For example, the technical features in the method claims of this specification can be combined to be implemented or performed in a device, and the technical features in the device claims can be combined to be implemented or performed in a method. In addition, the technical features in (one or more) method claims and (one or more) device claims can be combined to be implemented or performed in a device. In addition, the technical features in (one or more) method claims and (one or more) device claims can be combined to be implemented or performed in a method.

Claims

1. A method for performing wireless communication by a first device, the method comprising the steps of: Obtaining information related to Phase Tracking Reference Signal (PT-RS) transmission; obtaining information related to a sidelink (SL) positioning reference signal (PRS), the information related to the SL PRS comprising at least one of information related to an SLPRS resource identifier (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 a number of SL PRS symbols; and Performing SL PRS transmission based on information related to the SL PRS, The PT-RS transmission is canceled in the symbol in which the SL PRS is transmitted.

2. The method according to claim 1, wherein Based on the fact that the SL PRS transmission and the PT-RS transmission overlap in the symbol in which the SL PRS is transmitted, the PT-RS transmission is canceled.

3. The method according to claim 1, further comprising the steps of: Get information related to the SL resource pool, and Wherein, (i) in the SL resource pool, and (ii) in the symbol in which the SL PRS is transmitted, the PT-RS transmission is canceled.

4. The method according to claim 3, wherein: The SL resource pool includes a shared resource pool, which can be used for both the SL PRS transmission and the physical sidelink shared channel (PSSCH) transmission.

5. The method according to claim 1, further comprising the steps of: Get information related to the SL resource pool, and Wherein, (i) based on performing the SL PRS transmission on the SL PRS resources in the SL resource pool, and (ii) based on performing the PT-RS transmission on the SL PRS resources in the SL resource pool, canceling the PT-RS transmission.

6. The method according to claim 1, wherein (i) in the symbol in which the SL PRS is transmitted, and (ii) in the frequency domain in which the SL PRS is transmitted, canceling the PT-RS transmission.

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

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

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

10. The method according to claim 1, wherein A received signal strength indicator (RSSI) threshold for measuring a channel busy rate (CBR) on the SL PRS is related to an RSSI threshold for measuring the CBR on a physical sidelink shared channel (PSSCH).

11. The method according to claim 1, further comprising the steps of: Control information is sent via the control channel, and The control information includes information for identifying SL PRS resources related to the SL PRS.

12. The method according to claim 1, further comprising the steps of: sending first sidelink control information (SCI) via a physical sidelink control channel (PSCCH), and The first SCI includes information about reserved SL resources, and the method further includes the following steps: sending second sidelink control information (SCI) via a physical sidelink shared channel (PSSCH), and The second SCI includes index information about the reserved SL resources.

13. The method according to claim 1, further comprising the steps of: Get information related to the SL resource pool, and Based on that physical sidelink feedback channel (PSFCH) resources are configured in the SL resource pool, the period of the PSFCH resources is related to the period of the SL PRS.

14. A first apparatus adapted to perform wireless communication, the first apparatus comprising: one or more processors; one or more transceivers; as well as one or more memories operatively connected to the one or more processors and storing instructions that, upon execution by the one or more processors, cause the first device to perform operations comprising: Obtaining information related to Phase Tracking Reference Signal (PT-RS) transmission; obtaining information related to a sidelink (SL) positioning reference signal (PRS), the information related to the SL PRS comprising at least one of information related to an SLPRS resource identifier (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 a number of SL PRS symbols; and Performing SL PRS transmission based on information related to the SL PRS, The PT-RS transmission is canceled in the symbol in which the SL PRS is transmitted.

15. A processing device adapted to control a first device, the processing device comprising: one or more processors; as well as one or more memories operatively connected to the one or more processors and storing instructions that, upon execution by the one or more processors, cause the first device to perform operations comprising: Obtaining information related to Phase Tracking Reference Signal (PT-RS) transmission; obtaining information related to a sidelink (SL) positioning reference signal (PRS), the information related to the SL PRS comprising at least one of information related to an SLPRS resource identifier (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 a number of SL PRS symbols; and Performing SL PRS transmission based on information related to the SL PRS, The PT-RS transmission is canceled in the symbol in which the SL PRS is transmitted.

16. At least one non-transitory computer-readable medium storing instructions that, upon being executed, cause a first device to perform operations comprising: Obtaining information related to Phase Tracking Reference Signal (PT-RS) transmission; obtaining information related to a sidelink (SL) positioning reference signal (PRS), the information related to the SL PRS comprising at least one of information related to an SLPRS resource identifier (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 a number of SL PRS symbols; and Performing SL PRS transmission based on information related to the SL PRS, The PT-RS transmission is canceled in the symbol in which the SL PRS is transmitted.

17. A method for performing wireless communication by a second device, the method comprising the steps of: Obtaining information related to Phase Tracking Reference Signal (PT-RS) reception; obtaining information related to a sidelink (SL) positioning reference signal (PRS), the information related to the SL PRS comprising at least one of information related to an SLPRS resource identifier (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 a number of SL PRS symbols; and performing SL PRS reception based on information related to said SL PRS, The PT-RS reception is canceled in the symbol of receiving the SL PRS.

18. A second apparatus adapted to perform wireless communication, the second apparatus comprising: one or more processors; one or more transceivers; as well as one or more memories operatively connected to the one or more processors and storing instructions that, upon execution by the one or more processors, cause the second device to perform operations comprising: Obtaining information related to Phase Tracking Reference Signal (PT-RS) reception; obtaining information related to a sidelink (SL) positioning reference signal (PRS), the information related to the SL PRS comprising at least one of information related to an SLPRS resource identifier (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 a number of SL PRS symbols; and performing SL PRS reception based on information related to said SL PRS, The PT-RS reception is canceled in the symbol of receiving the SL PRS.

19. A processing device adapted to control a second device, the processing device comprising: one or more processors; as well as one or more memories operatively connected to the one or more processors and storing instructions that, upon execution by the one or more processors, cause the second device to perform operations comprising: Obtaining information related to Phase Tracking Reference Signal (PT-RS) reception; obtaining information related to a sidelink (SL) positioning reference signal (PRS), the information related to the SL PRS comprising at least one of information related to an SLPRS resource identifier (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 a number of SL PRS symbols; and performing SL PRS reception based on information related to said SL PRS, The PT-RS reception is canceled in the symbol of receiving the SL PRS.

20. At least one non-transitory computer-readable medium storing instructions that, upon being executed, cause a second device to perform operations comprising: Obtaining information related to Phase Tracking Reference Signal (PT-RS) reception; obtaining information related to a sidelink (SL) positioning reference signal (PRS), the information related to the SL PRS comprising at least one of information related to an SLPRS resource identifier (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 a number of SL PRS symbols; and performing SL PRS reception based on information related to said SL PRS, The PT-RS reception is canceled in the symbol of receiving the SL PRS.

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