Method and apparatus for configuring SL PRS slot structure for SL positioning

Abstract

A method of performing wireless communication by a first device and an apparatus supporting the same are provided. The method may comprise the steps of: acquiring configuration information related to a sidelink (SL) positioning reference signal (PRS); sending the first SL PRS based on the configuration information related to the SL PRS; and performing positioning based on the first SL PRS. For example, a first SL PRS and a second SL PRS are mapped within a time slot, a first symbol of the first SL PRS is aligned with a first symbol of the second SL PRS, and a last symbol of the first SL PRS is aligned with a last symbol of the second SL PRS.

Description

Technical Field

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

[0002] A sidelink (SL) refers to a communication method in which a direct link is configured between user equipments (UEs), and voice or data, etc. are directly exchanged between the UEs without passing through a base station (BS). Considering SL as a solution to the burden on the BS caused by a rapid increase in data traffic. Vehicle-to-Everything (V2X) refers to a communication technology that exchanges information with other vehicles, pedestrians, objects equipped with infrastructure, etc. via wired / wireless communication. V2X can be classified into four types: Vehicle-to-Vehicle (V2V), Vehicle-to-Infrastructure (V2I), Vehicle-to-Network (V2N), and Vehicle-to-Pedestrian (V2P). V2X communication can be provided via a PC5 interface and / or a Uu interface.

[0003] In addition, since more and more communication devices require a larger communication capacity, the demand for mobile broadband communication enhanced with respect to conventional radio access technology (RAT) is increasing. Therefore, a communication system for services or user equipments (UEs) that are sensitive to reliability and latency is discussed. Also, a next-generation radio access technology based on improved mobile broadband communication, massive machine type communication (MTC), ultra-reliable low-latency communication (URLLC), etc. can be referred to as a new radio access technology (RAT) or new radio (NR). Summary of the Invention

[0004] Technical Solution

[0005] In one embodiment, a method for a first device to perform wireless communication is provided. The method may include: obtaining configuration information related to a sidelink (SL) positioning reference signal (PRS); transmitting a first SL PRS based on the configuration related to the SL PRS; and performing positioning based on the first SL PRS. For example, the first SL PRS and the second SL PRS are mapped within one time slot, the first symbol of the first SL PRS is aligned with the first symbol of the second SL PRS, and the last symbol of the first SL PRS is aligned with the last symbol of the second SL PRS.

[0006] In one embodiment, a first device configured to perform wireless communication is provided. The first device may include: at least one transceiver; at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, these instructions, when executed by the at least one processor, cause the first device to perform operations that include:

[0007] Obtain configuration information related to a sidelink (SL) positioning reference signal (PRS); transmit a first SL PRS based on the configuration related to the SL PRS; and perform positioning based on the first SL PRS. For example, the first SL PRS and a second SL PRS are mapped within a time slot, a first symbol of the first SL PRS is aligned with a first symbol of the second SL PRS, and a last symbol of the first SL PRS is aligned with a last symbol of the second SL PRS.

[0008] In one embodiment, a processing device configured to control the first device is provided. The processing device may include: at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, these instructions, when executed by the at least one processor, cause the first device to perform operations that include: obtaining configuration information related to a sidelink (SL) positioning reference signal (PRS); transmitting a first SL PRS based on the configuration related to the SL PRS; and performing positioning based on the first SL PRS. For example, the first SL PRS and a second SL PRS are mapped within a time slot, a first symbol of the first SL PRS is aligned with a first symbol of the second SL PRS, and a last symbol of the first SL PRS is aligned with a last symbol of the second SL PRS.

[0009] In one embodiment, a non-transitory computer-readable storage medium recording instructions is provided. For example, these instructions, when executed, cause the first device to perform operations that include: obtaining configuration information related to a sidelink (SL) positioning reference signal (PRS); transmitting a first SL PRS based on the configuration related to the SL PRS; and performing positioning based on the first SL PRS. For example, the first SL PRS and a second SL PRS are mapped within a time slot, a first symbol of the first SL PRS is aligned with a first symbol of the second SL PRS, and a last symbol of the first SL PRS is aligned with a last symbol of the second SL PRS. Description of the Drawings

[0010] Figure 1 Shows a communication structure that can be provided in a 6G system based on an embodiment of the present disclosure.

[0011] Figure 2 Shows the electromagnetic spectrum based on an embodiment of the present disclosure.

[0012] Figure 3 Shows the structure of an NR system based on an embodiment of the present disclosure.

[0013] Figure 4 Shows the radio protocol architecture based on an embodiment of the present disclosure.

[0014] Figure 5 Shows the structure of a radio frame of NR based on an embodiment of the present disclosure.

[0015] Figure 6 Shows the structure of a time slot of an NR frame based on an embodiment of the present disclosure.

[0016] Figure 7 Shows an example of a BWP based on an embodiment of the present disclosure.

[0017] Figure 8 Shows the process in which a UE performs V2X or SL communication based on a transmission mode according to an embodiment of the present disclosure.

[0018] Figure 9 Shows an example of the architecture of a 5G system capable of locating a UE that has access to a next-generation radio access network (NG-RAN) or E-UTRAN based on an embodiment of the present disclosure.

[0019] Figure 10 Shows an example of a network for implementing the measurement of the location of a UE based on an embodiment of the present disclosure.

[0020] Figure 11 Shows an example of a protocol layer used to support the transmission of LTE positioning protocol (LPP) messages between an LMF and a UE based on an embodiment of the present disclosure.

[0021] Figure 12 Shows an example of a protocol layer used to support the transmission of NR positioning protocol A (NRPPa) PDUs between an LMF and an NG-RAN node based on an embodiment of the present disclosure.

[0022] Figure 13 Is a diagram for explaining the OTDOA positioning method based on an embodiment of the present disclosure.

[0023] Figure 14 Is a diagram for explaining the two-way round-trip time (RTT) based on an embodiment of the present disclosure.

[0024] Figure 15 Shows the SL PRS resource structure based on an embodiment of the present disclosure.

[0025] Figure 16 Shows the structure multiplexed within a time slot when multiple SL PRS resources with an SL PRS resource structure are located within the time slot, based on an embodiment of the present disclosure.

[0026] Figure 17 Shows the structure in which the SL PRS and the CCH related to the SL PRS resource are transmitted together within a time slot, based on an embodiment of the present disclosure.

[0027] Figure 18 Shows the structure in which when the SL PRS and the CCH related to the SL PRS resource are transmitted together within a time slot, the CCH is transmitted only in a specific frequency domain, based on an embodiment of the present disclosure.

[0028] Figure 19 Shows the structure in which multiple SL PRS are multiplexed within a time slot, based on an embodiment of the present disclosure.

[0029] Figure 20 Shows the structure in which multiple SL PRS are multiplexed within a time slot, based on an embodiment of the present disclosure.

[0030] Figure 21 Shows a method for a first device to perform wireless communication, based on an embodiment of the present disclosure.

[0031] Figure 22 Shows a method for a base station to perform wireless communication, based on an embodiment of the present disclosure.

[0032] Figure 23 Shows communication system 1 based on an embodiment of the present disclosure.

[0033] Figure 24 Shows a wireless device based on an embodiment of the present disclosure.

[0034] Figure 25 Shows a signal processing circuit for transmitting a signal, based on an embodiment of the present disclosure.

[0035] Figure 26 Shows another example of a wireless device based on an embodiment of the present disclosure.

[0036] Figure 27 Shows a handheld device based on an embodiment of the present disclosure.

[0037] Figure 28 Shows a vehicle or autonomous vehicle based on an embodiment of the present disclosure. Detailed implementation

[0038] 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".

[0039] The slash ( / ) or comma used in the present disclosure 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".

[0040] In the present disclosure, "at least one of A and B" may mean "only A", "only B", or "both A and B". Additionally, 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".

[0041] Furthermore, 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". Additionally, "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".

[0042] Moreover, the parentheses used in the present disclosure may mean "for example". Specifically, when indicated as "control information (PDCCH)", this may mean presenting "PDCCH" as an example of "control information". In other words, the "control information" in the present disclosure is not limited to "PDCCH", and "PDDCH" may be presented as an example of "control information". Specifically, when indicated as "control information (i.e., PDCCH)", this may also mean presenting "PDCCH" as an example of "control information".

[0043] In the following description, "when, if, or in the case of" may be replaced by "based on".

[0044] The technical features separately described in one of the drawings in the present disclosure may be implemented separately or may be implemented simultaneously.

[0045] In the present disclosure, a higher layer parameter may be a parameter configured, pre-configured, or pre-defined for a UE. For example, a base station or network may send a higher layer parameter to the UE. For example, a higher layer parameter may be sent via radio resource control (RRC) signaling or medium access control (MAC) signaling.

[0046] The techniques described below can be used in various wireless communication systems such as Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc. 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), etc. IEEE 802.16m is an evolved version of IEEE 802.16e and provides backward compatibility for IEEE 802.16e-based systems. UTRA is part of the Universal Mobile Telecommunications System (UMTS). The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of the Evolved UMTS (E-UMTS) that uses E-UTRA. 3GPP LTE uses OFDMA in the downlink and SC-FDMA in the uplink. Long Term Evolution-Advanced (LTE-A) is an evolution of LTE.

[0047] 5G New Radio (NR) is a follow-up technology to LTE-A corresponding to a new and innovative mobile communication system with characteristics such as high performance, low latency, and high availability. 5G NR can use resources of all available spectrums including low frequency bands below 1 GHz, intermediate frequency bands from 1 GHz to 10 GHz, and high frequencies (millimeter waves) above 24 GHz.

[0048] The 6G (wireless communication) system aims to have characteristics such as (i) very high data rate per device, (ii) a very large number of connected devices, (iii) global connectivity, (iv) very low latency, (v) reduced power consumption of battery-less IoT devices, (vi) ultra-reliable connectivity, and (vii) networked intelligence with machine learning capabilities. The vision of the 6G system can include four aspects such as intelligent connectivity, deep connectivity, holographic connectivity, and ubiquitous connectivity, and the 6G system can meet the requirements shown in Table 1 below. That is, Table 1 shows the requirements of the 6G system.

[0049] [Table 1]

[0050] Peak data rate per device 1 Tbps E2E latency 1 ms Maximum spectral efficiency 100 bps / Hz Mobility support Up to 1000 km / h Satellite integration Fully AI Fully Autonomous vehicles Fully XR Fully Tactile communication Fully

[0051] The 6G system 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, high energy efficiency, low backhaul and access network congestion, and enhanced data security.

[0052] Figure 1 Illustrates a communication structure that can be provided in a 6G system according to an embodiment of the present disclosure. Figure 1 Embodiments of can be combined with various embodiments of the present disclosure.

[0053] The 6G system will have 50 times higher simultaneous wireless communication connectivity than the 5G wireless communication system. URLLC, which is a major function of 5G, will become an even more important technology by providing an end-to-end latency of less than 1 ms in 6G communication. Different from the frequently used spectral efficiency of the domain, the 6G system can have better volumetric spectral efficiency. The 6G system can provide advanced battery technology for energy harvesting and a very long battery life, and thus mobile devices in the 6G system may not need to be charged separately. In 6G, new network characteristics can be as follows.

[0054] - Satellite-integrated network: To provide a global mobile group, 6G will be integrated with satellites. Integrating terrestrial waves, satellites, and public networks into one wireless communication system may be very important for 6G.

[0055] - Interconnected intelligence: Different from the previous generations of wireless communication systems, 6G is innovative, and the wireless evolution may be updated from "connected things" to "connected intelligence". AI can be applied at each step of the communication process (or each signal processing process described below).

[0056] - Seamless integration of wireless information and energy transfer: The 6G wireless network can transfer electricity to charge the batteries of devices such as smartphones and sensors. Therefore, wireless information and energy transfer (WIET) will be integrated.

[0057] - Ubiquitous ultra-three-dimensional connectivity: Access to the network and core network functions of drones and very low Earth orbit satellites will establish ultra-3D connections in 6G ubiquity.

[0058] Among the new network characteristics of 6G, several general requirements are as follows.

[0059] - Small cell network: The concept of a small cell network is introduced to improve the received signal quality as a result of the improvement of the throughput, energy efficiency, and spectral efficiency of the cellular system. Therefore, the small cell network is a necessary feature of 5G and beyond 5G (5GB) communication systems. Therefore, the 6G communication system also adopts the characteristics of the small cell network.

[0060] - Ultra-dense heterogeneous network: Ultra-dense heterogeneous network will be another important feature of 6G communication systems. A multi-tier network consisting of heterogeneous networks improves the overall QoS and reduces costs.

[0061] - High-capacity backhaul: Backhaul connections are characterized by high-capacity backhaul networks to facilitate high-capacity services. High-speed optical fibers and free space optical (FSO) systems can be possible solutions to this problem.

[0062] - 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.

[0063] - Softwareization and virtualization: Softwareization and virtualization are two important functions that are the basis of the design process in 5G networks to ensure flexibility, reconfigurability, and programmability.

[0064] The core implementation technologies of 6G systems are described below.

[0065] - Artificial intelligence (AI): The most important and newly introduced technology in 6G systems is AI. AI was not involved in 4G systems. 5G systems will support partial or very limited AI. However, 6G systems will support AI for full automation. Advancements in machine learning will create a more intelligent network for real-time communication in 6G. When AI is introduced into communication, real-time data transmission can be simplified and improved. AI can use numerous analyses to determine ways to perform complex target tasks. That is, AI can increase efficiency and reduce processing latency. Time-consuming operations such as handover, network selection, and resource scheduling can be immediately executed by AI. AI can also play an important role in M2M, machine-to-human, and human-to-machine. Additionally, AI may be instant communication in brain-computer interfaces (BCIs). AI-based communication systems can be supported by metamaterials, intelligent structures, intelligent networks, intelligent devices, intelligent cognitive radios, self-maintaining wireless networks, and machine learning.

[0066] - Terahertz (THz) Communication: The data rate can be increased by increasing the bandwidth. This can be achieved by using sub-TH communication with a wide bandwidth and applying advanced massive MIMO techniques. THz waves are called submillimeter radiation and generally indicate a frequency band between 0.1 THz and 10 THz with corresponding wavelengths in the range of 0.03 mm to 3 mm. The band range of 100 GHz to 300 GHz (sub-THz band) is regarded as the main part of the THz band for cellular communication. When the sub-THz band is added to the millimeter wave band, the 6G cellular communication capacity increases. The defined THz band of 300 GHz to 3 THz is in the far-infrared (IR) frequency band. The band of 300 GHz to 3 THz is part of the optical band but lies at the boundary of the optical band and immediately follows the RF band. Therefore, the band of 300 GHz to 3 THz has similarities with RF. Figure 2 Shows the electromagnetic spectrum based on an embodiment of the present disclosure. Figure 2 Embodiments of can be combined with various embodiments of the present disclosure. The main features of THz communication include (i) a bandwidth that can be widely used to support very high data rates; and (ii) high path loss occurring at high frequencies (highly directional antennas are essential). The narrow beamwidth generated in highly directional antennas reduces interference. The small wavelength of THz signals allows a larger number of antenna elements to be integrated with devices and BS operating in this band. Therefore, advanced adaptive arrangement techniques that can overcome range limitations can be used.

[0067] - Massive MIMO Technology (Large MIMO)

[0068] - Holographic Beamforming (HBF)

[0069] - Optical Wireless Technology

[0070] - Free Space Optical Backhaul Network (FSO Backhaul Network)

[0071] - Non-Terrestrial Network (NTN)

[0072] - Quantum Communication

[0073] - Cell-Free Communication

[0074] - Integration of Wireless Information and Power Transmission

[0075] - Integration of Wireless Communication and Sensing

[0076] - Integrated Access and Backhaul Network

[0077] - Big Data Analysis

[0078] - Reconfigurable Intelligent Surface

[0079] - Metaverse

[0080] - Blockchain

[0081] - Unmanned Aerial Vehicle (UAV): An Unmanned Aerial Vehicle (UAV) or drone will be an important factor in 6G wireless communication. In most cases, UAV technology is used to provide high-speed wireless data connections. A base station entity is installed inside the UAV to provide cellular connectivity. The UAV has certain functions not found in fixed base station infrastructure, such as easy deployment, a strong line-of-sight link, and freedom of mobility control. During emergency events such as natural disasters, it is economically unfeasible to deploy ground telecommunications infrastructure and sometimes it is unable to provide services in a turbulent environment. The UAV can easily handle such situations. The UAV will become a new paradigm in the field of wireless communication. This technology promotes the three basic requirements of wireless networks, such as eMBB, URLLC, and mMTC. The UAV can also be used for various purposes, such as network connectivity improvement, fire detection, disaster emergency services, security and monitoring, pollution monitoring, parking monitoring, and accident monitoring. Therefore, UAV technology is recognized as one of the most important technologies for 6G communication.

[0082] - Autopilot (self-driving): To achieve perfect autopilot, it is necessary to mutually notify dangerous situations through vehicle-to-vehicle communication and check information such as parking information locations and signal change times through communication between the vehicle and infrastructure such as parking lots and / or traffic lights. Vehicle-to-Everything (V2X) is the core element for building an autopilot infrastructure and is a technology in which a vehicle communicates and shares with various elements in the road, such as Vehicle-to-Vehicle (V2V), Vehicle-to-Infrastructure (V2I). To maximize the performance of autopilot and ensure high safety, high transmission speed and low latency technologies are required. In addition, to directly control a vehicle in a dangerous situation and actively intervene in vehicle driving at a level beyond warning or guidance messages to the driver, since the amount of information to be sent and received is large, autonomous driving is expected to be maximized in 6G with a faster transmission speed and lower latency than 5G.

[0083] For the clarity of the specification, 5G NR is mainly described, but the technical idea according to the embodiments of the present disclosure is not limited thereto. Various embodiments of the present disclosure can also be applied to 6G communication systems.

[0084] Figure 3 The structure of an NR system based on an embodiment of the present disclosure is shown. Figure 3 The embodiments of can be combined with various embodiments of the present disclosure.

[0085] Refer to Figure 3, the next-generation radio access network (NG-RAN) may include a BS20 that provides user plane and control plane protocol termination to the UE 10. For example, the BS20 may include a next-generation node B (gNB) and / or an evolved node B (eNB). For example, the UE 10 may be fixed or mobile and may be referred to by other terms such as mobile station (MS), user terminal (UT), subscriber station (SS), mobile terminal (MT), wireless device, etc. For example, the BS may be referred to as a fixed station that communicates with the UE 10 and may be referred to by other terms such as base transceiver system (BTS), access point (AP), etc.

[0086] Figure 3 The illustrated embodiment shows a case that only includes gNBs. The BS20s may be interconnected via the Xn interface. The BS20s may be interconnected via the fifth-generation (5G) core network (5GC) and the NG interface. More specifically, the BS20 may be connected to the access and mobility management function (AMF) 30 via the NG-C interface and may be connected to the user plane function (UPF) 30 via the NG-U interface.

[0087] The radio interface protocol layers between the UE and the network may be classified into a first layer (L1), a second layer (L2), and a third layer (L3) based on the lower three layers of the well-known Open Systems Interconnection (OSI) model in the communication system. Among them, the physical (PHY) layer belonging to the first layer provides information transmission services using physical channels, and the radio resource control (RRC) layer located in the third layer controls the radio resources between the UE and the network. To this end, the RRC layer exchanges RRC messages between the UE and the BS layer.

[0088] Figure 4 Shows a radio protocol architecture based on an embodiment of the present disclosure. Figure 4 The embodiments may be combined with various embodiments of the present disclosure. Specifically, Figure 4 (a) in shows the radio protocol stack of the user plane for Uu communication, and Figure 4 (b) in shows the radio protocol stack of the control plane for Uu communication. Figure 4 (c) in shows the radio protocol stack of the user plane for SL communication, and Figure 4 (d) in shows the radio protocol stack of the control plane for SL communication.

[0089] Refer to Figure 4, The physical layer provides an information transfer service to the upper layer through physical channels. The physical layer is connected to the Medium Access Control (MAC) layer, which is the upper layer of the physical layer, through transport channels. Data is transferred between the MAC layer and the physical layer through transport channels. Transport channels are classified according to how data is transmitted through the radio interface and what characteristics of the data are transmitted.

[0090] Data is transferred through physical channels between different physical layers (i.e., the PHY layer of the transmitter and the PHY layer of the receiver). The physical channels can be modulated using the Orthogonal Frequency Division Multiplexing (OFDM) scheme, and the physical channels use time and frequency as radio resources.

[0091] The MAC layer provides services to the Radio Link Control (RLC) layer via logical channels. The RLC layer is the upper layer of the MAC layer. The MAC layer provides the function of mapping multiple logical channels to multiple transport channels. The MAC layer also provides the function of logical channel multiplexing by mapping multiple logical channels to a single transport channel. The MAC layer provides a data transfer service through logical channels.

[0092] The RLC layer performs concatenation, segmentation, and reassembly of Radio Link Control Service Data Units (RLC SDUs). To ensure different Quality of Service (QoS) required for radio bearers (RBs), the RLC layer provides three types of operation modes, namely, transparent mode (TM), unacknowledged mode (UM), and acknowledged mode (AM). AM RLC provides error correction through Automatic Repeat reQuest (ARQ).

[0093] The Radio Resource Control (RRC) layer is only defined in the control plane. The RRC layer is used to control logical channels, transport channels, and physical channels associated with the configuration, reconfiguration, and release of RBs. An RB is a logical path provided by the first layer (i.e., the physical layer or PHY layer) and the second layer (i.e., the MAC layer, RLC layer, Packet Data Convergence Protocol (PDCP) layer, and Service Data Adaptation Protocol (SDAP) layer) for data transfer between the UE and the network.

[0094] The functions of the Packet Data Convergence Protocol (PDCP) in the user plane include the transmission of user data, header compression, and encryption. The functions of the Packet Data Convergence Protocol (PDCP) in the control plane include the transmission of control plane data and encryption / integrity protection.

[0095] The Service Data Adaptation Protocol (SDAP) layer is only defined in the user plane. The SDAP layer performs the mapping between Quality of Service (QoS) flows and Data Radio Bearers (DRBs) and the QoS flow ID (QFI) marking in both DL packets and UL packets.

[0096] The configuration of an RB means a process for specifying radio protocol layer and channel attributes to provide a specific service and for determining corresponding detailed parameters and operation methods. An RB can then be classified into two types, namely, a signaling radio bearer (SRB) and a data radio bearer (DRB). An SRB is used as a path for transmitting RRC messages in the control plane, and a DRB is used as a path for transmitting user data in the user plane.

[0097] When an RRC connection is established between the RRC layer of a 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 a UE in the RRC_INACTIVE state can maintain its connection with the core network while releasing its connection with the BS.

[0098] 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 services or control messages. Traffic or control messages for downlink multicast or broadcast services can be sent via the downlink SCH or can be sent via a separate downlink multicast channel (MCH). In addition, uplink transport channels for sending (or transmitting) data from the UE to the network include a random access channel (RACH) for sending an initial control message and an uplink shared channel (SCH) for sending other user services or control messages.

[0099] Examples of logical channels belonging to a higher layer of a transport channel and mapped to the 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.

[0100] Figure 5 Shows the structure of a radio frame of NR according to an embodiment of the present disclosure. Figure 5 Embodiments of can be combined with various embodiments of the present disclosure.

[0101] Refer to Figure 5, in NR, radio frames can be used to perform uplink and downlink transmissions. The length of a radio frame is 10 ms and can be defined as consisting of two half-frames (HFs). A half-frame can include five 1-ms sub-frames (SFs). A sub-frame (SF) can be divided into one or more time slots, and the number of time slots within a sub-frame can be determined according to the subcarrier spacing (SCS). Each time slot can include 12 or 14 OFDM(A) symbols according to the cyclic prefix (CP).

[0102] In the case of using normal CP, each time slot can include 14 symbols. In the case of using extended CP, each time slot can include 12 symbols. In this document, symbols can include OFDM symbols (or CP-OFDM symbols) and single-carrier FDMA (SC-FDMA) symbols (or discrete Fourier transform spread OFDM (DFT-s-OFDM) symbols).

[0103] Table 2 shown below represents the number of symbols per time slot (N slot symb ), the number of time slots per frame (N frame,μ slot ) and the number of time slots per sub-frame (N subframe ,μ slot ) based on the SCS configuration (μ) in the case of using normal CP or extended CP.

[0104] [Table 2]

[0105]

[0106] In an NR system, the OFDM(A) parameter sets (e.g., SCS, CP length, etc.) between multiple cells integrated into one UE can be configured differently. Therefore, the (absolute time) duration (or interval) of a time resource (e.g., sub-frame, time slot or TTI) (collectively referred to as time unit (TU) for simplicity) consisting of the same number of symbols can be configured differently in the integrated cells.

[0107] In NR, multiple parameter sets or SCSs can be supported to support various 5G services. For example, in the case of SCS being 15 kHz, a wide range of traditional cellular bands can be supported, and in the case of SCS being 30 kHz / 60 kHz, dense cities, lower latency, and wider carrier bandwidth can be supported. In the case of SCS being 60 kHz or higher, in order to overcome phase noise, a bandwidth greater than 24.25 GHz can be used.

[0108] The NR frequency band can be defined as two different types of frequency ranges. The two different types of frequency ranges can be FR1 and FR2. The values of the frequency ranges can change (or vary). For example, the two different types of frequency ranges can be as shown in Table 3 below. Among the frequency ranges used in the NR system, FR1 can mean "range below 6 GHz", and FR2 can mean "range above 6 GHz", and can also be referred to as millimeter wave (mmW).

[0109] [Table 3]

[0110] Frequency range designation Corresponding frequency range Subcarrier spacing (SCS) FR1 450 MHz – 6000 MHz 15, 30, 60 kHz FR2 24250 MHz – 52600 MHz 60, 120, 240 kHz

[0111] As described above, the values of the frequency ranges in the NR system can change (or vary). For example, as shown in Table 4 below, FR1 can include a bandwidth in the range of 410 MHz to 7125 MHz. More specifically, FR1 can include frequency bands of 6 GHz (or 5850, 5900, 5925 MHz, etc.) and higher. For example, the frequency bands of 6 GHz (or 5850, 5900, 5925 MHz, etc.) and higher included in FR1 can include unlicensed bands. The unlicensed bands can be used for various purposes. For example, the unlicensed bands are used for vehicle-specific communications (e.g., autonomous driving).

[0112] [Table 4]

[0113] Frequency range designation Corresponding frequency range Subcarrier spacing (SCS) FR1 410 MHz – 7125 MHz 15, 30, 60 kHz FR2 24250 MHz – 52600 MHz 60, 120, 240 kHz

[0114] Figure 6 Shows the structure of a time slot of an NR frame according to an embodiment of the present disclosure. Figure 6 The embodiments can be combined with various embodiments of the present disclosure.

[0115] Refer to Figure 6 , the time slot includes a plurality of symbols in the time domain. For example, in the case of normal CP, one time slot can include 14 symbols. For example, in the case of extended CP, one time slot can include 12 symbols. Alternatively, in the case of normal CP, one time slot can include 7 symbols. However, in the case of extended CP, one time slot can include 6 symbols.

[0116] A carrier includes multiple subcarriers in the frequency domain. A resource block (RB) can be defined as multiple consecutive subcarriers in the frequency domain (e.g., 12 subcarriers). A bandwidth part (BWP) can be defined as multiple consecutive (physical) resource blocks ((P)RB) 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 an active BWP. Each element can be referred to as a resource element (RE) in a resource grid, and one complex symbol can be mapped to each element.

[0117] Hereinafter, the bandwidth part (BWP) and the carrier will be described in detail.

[0118] A BWP can be a continuous set of physical resource blocks (PRB) within a given parameter set. The PRB can be selected from a continuous subset of common resource blocks (CRB) for a given parameter set on a given carrier.

[0119] For example, a BWP can be at least any one of an active BWP, an initial BWP, and / or a default BWP. For example, a UE may not monitor the downlink radio link quality in a DL BWP other than the active DL BWP on the primary cell (PCell). For example, a UE may not receive a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), or a channel state information-reference signal (CSI-RS) (excluding RRM) outside the active DL BWP. For example, a UE may not trigger a channel state information (CSI) report for an inactive DL BWP. For example, a UE may not transmit a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) outside the active UL BWP. For example, in the case of the downlink, the initial BWP can be given as a continuous RB set for the remaining minimum system information (RMSI) control resource set (CORESET) (configured by the physical broadcast channel (PBCH)). For example, in the case of the uplink, the initial BWP can be given by a system information block (SIB) for the random access procedure. For example, the default BWP can be configured by a higher layer. For example, the initial value of the default BWP can be the initial DL BWP. For power saving, if a UE cannot detect downlink control information (DCI) during a specified period, the UE can switch the active BWP of the UE to the default BWP.

[0120] In addition, a BWP can be defined for SL. The same SL BWP can be used for transmission and reception. For example, a transmitting UE can transmit an SL channel or an SL signal on a specific BWP, and a receiving UE can receive an SL channel or an SL signal on a specific BWP. In a licensed carrier, the SL BWP can be defined separately from the Uu BWP, and the SL BWP can have configuration signaling separate from the Uu BWP. For example, a UE can receive configuration for the SL BWP from the BS / network. For example, a UE can receive configuration for the Uu BWP from the BS / network. The SL BWP is (pre-)configured in the carrier for out-of-coverage NR V2X UEs and RRC_IDLE UEs. For a UE in the RRC_CONNECTED mode, at least one SL BWP can be activated in the carrier.

[0121] Figure 7 Fig. shows an example of a BWP according to an embodiment of the present disclosure. Figure 7 Embodiments of can be combined with various embodiments of the present disclosure. Assume that in Figure 7 the embodiment of, the number of BWPs is 3.

[0122] Referring to Figure 7 , a common resource block (CRB) can be a carrier resource block numbered from one end of a carrier band to the other end thereof. Additionally, a PRB can be a resource block numbered within each BWP. Point A can indicate a common reference point of a resource block grid.

[0123] A BWP can be configured by point A, an offset (N start BWP ) relative to point A, and a bandwidth (N size 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 at point A. For example, the offset can be the PRB distance between the lowest subcarrier within a given parameter set and point A. For example, the bandwidth can be the number of PRBs within a given parameter set.

[0124] Hereinafter, V2X or SL communication will be described.

[0125] The sidelink synchronization signal (SLSS) may include a primary sidelink synchronization signal (PSSS) and a secondary sidelink synchronization signal (SSSS) as SL-specific sequences. The PSSS may be referred to as the sidelink primary synchronization signal (S-PSS), and the SSSS may be referred to as the sidelink 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 S-SSS for detailed synchronization acquisition and for the detection of the synchronization signal ID.

[0126] The physical sidelink broadcast channel (PSBCH) may be a (broadcast) channel for transmitting default (system) information that the UE must first know before SL signal transmission / reception. For example, the default information may be information related to SLSS, duplex mode (DM), time-division duplex (TDD) uplink / downlink (UL / DL) configuration, information related to the resource pool, and the type of application related to SLSS, subframe offset, broadcast information, etc. For example, in order to evaluate the PSBCH performance, in NR V2X, the payload size of the PSBCH may be 56 bits, including a 24-bit cyclic redundancy check (CRC).

[0127] The S-PSS, S-SSS, and PSBCH can be included in a block format that supports periodic transmission (e.g., the SL synchronization signal (SS) / PSBCH block, hereinafter, the sidelink synchronization signal block (S-SSB)). The S-SSB may 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 may be within a (pre-)configured sidelink (SL) BWP. For example, the S-SSB may have a bandwidth of 11 resource blocks (SB). For example, the PSBCH may span 11 RBs. Additionally, the frequency position of the S-SSB can be (pre-)configured. Thus, the UE does not have to perform hypothesis detection at the frequency to discover the S-SSB in the carrier.

[0128] Figure 8 A process of the UE performing V2X or SL communication based on a transmission mode according to an embodiment of the present disclosure is shown. Figure 8 The embodiments may be combined with various embodiments of the present disclosure. In various embodiments of the present disclosure, the transmission mode may be referred to as a mode or a resource allocation mode. Hereinafter, for ease of explanation, in LTE, the transmission mode may be referred to as the LTE transmission mode. In NR, the transmission mode may be referred to as the NR resource allocation mode.

[0129] For example, Figure 8 (a) in Figure 8 shows UE operations related to LTE transmission mode 1 or LTE transmission mode 3. Alternatively, for example, Figure 8 (a) in Figure 8 shows UE operations related to NR resource allocation mode 1. For example, LTE transmission mode 1 can be applied to regular SL communication, and LTE transmission mode 3 can be applied to V2X communication.

[0130] For example, Figure 8 (b) in Figure 8 shows UE operations related to LTE transmission mode 2 or LTE transmission mode 4. Alternatively, for example, Figure 8 (b) in Figure 8 shows UE operations related to NR resource allocation mode 2.

[0131] Referring to Figure 8 (a) of Figure 8 , in LTE transmission mode 1, LTE transmission mode 3, or NR resource allocation mode 1, the base station can schedule SL resources to be used by the UE for SL transmission. For example, in step S800, the base station can send information related to the SL resources and / or information related to the UL resources to the first UE. For example, the UL resources can include PUCCH resources and / or PUSCH resources. For example, the UL resources can be resources for reporting SL HARQ feedback to the base station.

[0132] For example, the first UE can receive information related to dynamic grant (DG) resources and / or information related to configured grant (CG) resources from the base station. For example, the CG resources can include CG type 1 resources or CG type 2 resources. In the present disclosure, the DG resources can be resources configured / assigned by the base station to the first UE through downlink control information (DCI). In the present disclosure, the CG resources can be (periodic) resources configured / assigned by the base station to the first UE through DCI and / or RRC messages. For example, in the case of CG type 1 resources, the base station can 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 can send an RRC message including information related to the CG resources to the first UE, and the base station can send DCI related to the activation or release of the CG resources to the first UE.

[0133] 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 pre-configured rules. For example, the DCI may be DCI for SL scheduling. For example, the format of the DCI may be DCI format 3_0 or DCI format 3_1.

[0134] Hereinafter, an example of DCI format 3_0 will be described.

[0135] DCI format 3_0 is used for the scheduling of NR PSCCH and NR PSSCH in a cell.

[0136] The following information is sent by DCI format 3_0 with a CRC scrambled by SL-RNTI or SL-CS-RNTI:

[0137] - Resource pool index - ceiling(log2I) bits, where I is the number of resource pools for transmission configured by the higher layer parameter sl-TxPoolScheduling.

[0138] - Time gap - 3 bits determined by the higher layer parameter sl-DCI-ToSL-Trans

[0139] - HARQ process number - 4 bits

[0140] - New data indicator - 1 bit

[0141] - Lowest index of the subchannel assigned to the initial transmission - ceiling(log2(N SL subChannel )) bits

[0142] - SCI format 1-A fields: frequency resource assignment, time resource assignment

[0143] -PSFCH-to-HARQ feedback timing indicator - ceiling(log2N fb_timing ) bits, where N fb_timing is the number of entries in the higher layer parameter sl-PSFCH-ToPUCCH.

[0144] -PUCCH resource indicator - 3 bits

[0145] -Configuration index - 0 bits if the UE is not configured to monitor DCI format 3_0 with CRC scrambled by SL-CS-RNTI; otherwise 3 bits. If the UE is configured to monitor DCI format 3_0 with CRC scrambled by SL-CS-RNTI, this field is reserved for DCI format 3_0 with CRC scrambled by SL-RNTI.

[0146] -Counter side link assignment index - 2 bits if the UE is configured with pdsch-HARQ-ACK-Codebook = dynamic; 2 bits if the UE is configured with pdsch-HARQ-ACK-Codebook = semi-static

[0147] -Padding bits if required

[0148] Refer to Figure 8 In (b) of, in LTE transmission mode 2, LTE transmission mode 4, or NR resource allocation mode 2, the UE can determine the SL transmission resources within the SL resources configured by the base station / network or pre-configured SL resources. For example, the configured SL resources or pre-configured SL resources can be a resource pool. For example, the UE can autonomously select or schedule the resources for SL transmission. For example, the UE can perform SL communication by autonomously selecting the resources within the configured resource pool. For example, the UE can autonomously select resources within the selection window by performing a sensing process and a resource (re)selection process. For example, sensing can be performed in units of subchannels. For example, in step S810, the first UE that has itself selected resources from the resource pool can send a PSCCH (e.g., side link control information (SCI) or first-level SCI) to the second UE by using the resources. In step S820, the first UE can 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 can receive a PSFCH related to the PSCCH / PSSCH from the second UE.

[0149] Refer to Figure 8For (a) or (b) above, 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 SCI) 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 SCI) 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-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-level SCI, or the second-level SCI format. For example, the first-level SCI format may include SCI format 1-A, and the second-level SCI format may include SCI format 2-A and / or SCI format 2-B.

[0150] Hereinafter, an example of SCI format 1-A will be described.

[0151] SCI format 1-A is used to schedule the second-level SCI on the PSSCH and PSSCH.

[0152] The following information is sent by means of SCI format 1-A:

[0153] - Priority - 3 bits

[0154] - Frequency resource assignment - When the value of the higher layer parameter sl-MaxNumPerReserve is configured to 2, ceiling(log2(N SL subChannel (N SL subChannel +1) / 2)) bits; otherwise, when the value of the higher layer parameter sl-MaxNumPerReserve is configured to 3, ceiling log2(N SL subChannel (N SL subChannel +1)(2N SL subChannel +1) / 6) bits.

[0155] - Time resource assignment - When the value of the higher layer parameter sl-MaxNumPerReserve is configured to 2, 5 bits; otherwise, when the value of the higher layer parameter sl-MaxNumPerReserve is configured to 3, 9 bits

[0156] - Resource reservation period - If the higher layer parameter sl-MultiReserveResource is configured, ceiling(log2 N rsv_period ) bits, where N rsv_periodis the number of entries in the higher layer parameter sl-ResourceReservePeriodList; otherwise, 0 bits

[0157] - DMRS pattern - ceiling(log2 N pattern ) bits, where N pattern is the number of DMRS patterns configured by the higher layer parameter sl-PSSCH-DMRS-TimePatternList

[0158] - Second-level SCI format - 2 bits, as defined in Table 5

[0159] - Beta_offset indicator - 2 bits, as provided by the higher layer parameter sl-BetaOffsets2ndSCI

[0160] - Number of DMRS ports - 1 bit, as defined in Table 6

[0161] - Modulation and coding scheme - 5 bits

[0162] - 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 bits

[0163] - PSFCH overhead indication - 1 bit if the higher layer parameter sl-PSFCH-Period = 2 or 4; otherwise, 0 bits

[0164] - Reserved bits - The number of bits determined by the higher layer parameter sl-NumReservedBits, whose value is set to zero.

[0165] [Table 5]

[0166] Value of the second-level SCI format field Second-level SCI format 00 SCI format 2-A 01 SCI format 2-B 10 Reserved 11 Reserved

[0167] [Table 6]

[0168] Value of the number of DMRS port fields Antenna port 0 1000 1 1000 and 1001

[0169] In the following, an example of SCI format 2-A will be described.

[0170] SCI format 2-A is used for the decoding of PSSCH and is used together with HARQ operations when the HARQ-ACK information includes ACK or NACK, when the HARQ-ACK information only includes NACK, or when there is no feedback of HARQ-ACK information.

[0171] The following information is sent by means of SCI format 2-A:

[0172] - HARQ Process Number - 4 bits

[0173] - New Data Indicator - 1 bit

[0174] - Redundancy Version - 2 bits

[0175] - Source ID - 8 bits

[0176] - Destination ID - 16 bits

[0177] - HARQ Feedback Enable / Disable Indicator - 1 bit

[0178] - Broadcast Type Indicator - 2 bits, as defined in Table 7

[0179] - CSI Request - 1 bit

[0180] [Table 7]

[0181] 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 NACK

[0182] In the following, an example of SCI Format 2-B will be described.

[0183] For HARQ operation, when the HARQ-ACK information includes only NACK, or when there is no feedback of HARQ-ACK information, SCI Format 2-B is used for the decoding of PSSCH.

[0184] The following information is sent by means of SCI Format 2-B:

[0185] - HARQ Process Number - 4 bits

[0186] - New Data Indicator - 1 bit

[0187] - Redundancy Version - 2 bits

[0188] - Source ID - 8 bits

[0189] - Destination ID - 16 bits

[0190] - HARQ Feedback Enable / Disable Indicator - 1 bit

[0191] - Zone ID - 12 bits

[0192] - Communication Range Requirement - 4 bits determined by the higher layer parameter sl-ZoneConfigMCR-Index

[0193] Refer to Figure 8For (a) or (b) of the above, in step S830, the first UE may receive the PSFCH. For example, the first UE and the second UE may determine the PSFCH resource, and the second UE may use the PSFCH resource to send HARQ feedback to the first UE.

[0194] Referring to Figure 8 For (a) of the above, in step S840, the first UE may send SL HARQ feedback to the base station via the PUCCH and / or PUSCH.

[0195] Hereinafter, the hybrid automatic repeat request (HARQ) process will be described.

[0196] For example, SL HARQ feedback may be enabled for unicast. In this case, in non-codeblock 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 related to the PSCCH, the receiving UE may generate a HARQ-ACK. Additionally, the receiving UE may send the HARQ-ACK to the sending 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 may generate a HARQ-NACK. Additionally, the receiving UE may send the HARQ-NACK to the sending UE.

[0197] 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.

[0198] (1) Multicast option 1: After the receiving UE decodes the PSCCH whose target is the receiving UE, if the receiving UE cannot decode the transport block related to the PSCCH, the receiving UE may send a HARQ-NACK to the sending UE via the PSFCH. Otherwise, if the receiving UE decodes the PSCCH whose target is the receiving UE and if the receiving UE successfully decodes the transport block related to the PSCCH, the receiving UE may not send a HARQ-ACK to the sending UE.

[0199] (2) Multicast option 2: After the receiving UE decodes the PSCCH whose target is the receiving UE, if the receiving UE cannot decode the transport block related to the PSCCH, the receiving UE may send a HARQ-NACK to the sending UE via the PSFCH. Additionally, if the receiving UE decodes the PSCCH whose target is the receiving UE and if the receiving UE successfully decodes the transport block related to the PSCCH, the receiving UE may send a HARQ-ACK to the sending UE via the PSFCH.

[0200] 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.

[0201] For example, if multicast option 2 is used for SL HARQ feedback, each UE performing multicast communication can use different PSFCH resources for HARQ feedback transmission. For example, UEs belonging to the same group can send HARQ feedback by using different PSFCH resources.

[0202] 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.

[0203] Hereinafter, positioning will be described.

[0204] Figure 9 An example of an architecture in a 5G system according to an embodiment of the present disclosure is shown, the 5G system being capable of positioning a UE accessing a next-generation radio access network (NG-RAN) or E-UTRAN. Figure 9 Embodiments of may be combined with various embodiments of the present disclosure.

[0205] Referring to Figure 9 , the AMF may receive a request for a location service related to a specific target UE from a different entity such as a gateway mobile location center (GMLC) or may determine to initiate a location service in the AMF itself rather than in the specific target UE. Then, the AMF may send a location service request to a location management function (LMF). When receiving the location service request, the LMF may process the location service request and return a processed request including an estimated location of the UE, etc., to the AMF. At the same time, if a location service request is received from a different entity such as GMLC other than the AMF, the AMF may pass the processed request received from the LMF to the different entity.

[0206] The new generation evolved NB (ng-eNB) and gNB are network elements of the NG-RAN capable of providing measurement results for location estimation, and may measure radio signals for a target UE and may pass the result values to the LMF. In addition, the ng-eNB may control several transmission points (TPs) such as: for E-UTRA, a remote radio head or a PRS dedicated TP supporting a beacon system based on a positioning reference signal (PRS).

[0207] The LMF can be connected to an Enhanced Serving Mobile Location Center (E-SMLC), and the E-SMLC can allow the LMF to access the E-UTRAN. For example, the E-SMLC can allow the LMF to support Observed Time Difference of Arrival (OTDOA), which is one of the positioning methods of the E-UTRAN, by using downlink measurement results obtained from signals sent by the target UE via the gNB and / or PRS dedicated TPs in the E-UTRAN.

[0208] Meanwhile, the LMF can be connected to a 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 UE location measurement results. For the positioning of the target UE, the LMF can determine the positioning method based on factors such as the Location Service (LCS) client type, the requested Quality of Service (QoS), the UE positioning capability, the gNB positioning capability, and the ng-eNB positioning capability, and can apply such a positioning method to the serving gNB and / or serving ng-eNB. Additionally, the LMF can determine additional information such as the location estimate value of the target UE and the accuracy of the location estimate and speed. The SLP is the Secure User Plane Location (SUPL) entity responsible for positioning via the user plane.

[0209] The UE can measure downlink signals via the NG-RAN, E-UTRAN, and / or other sources such as different Global Navigation Satellite Systems (GNSS) and Terrestrial Beacon Systems (TBS), Wireless Local Area Network (WLAN) access points, Bluetooth beacons, the UE barometric pressure sensor, etc. The UE can include an LCS application. The UE can communicate with the networks accessible to the UE, or can access the LCS application through another application included in the UE. The LCS application can include the measurement and calculation functions required to determine the location of the UE. For example, the UE can include an independent positioning function such as the Global Positioning System (GPS), and can report the location of the UE independent of NG-RAN transmission. The positioning information obtained independently like this can be used as auxiliary information for the positioning information obtained from the network.

[0210] Figure 10 An example of a network for implementing the measurement of the UE's location based on an embodiment of the present disclosure is shown. Figure 10 The embodiments can be combined with various embodiments of the present disclosure.

[0211] When the UE is in the Connection Management (CM)-Idle state, if the AMF receives a location service request, the AMF can establish a signaling connection with the UE and can request the network to trigger a service to allocate a specific serving gNB or ng-eNB. In Figure 10Such an operation process is omitted. That is, it can be assumed that the UE is in the connected mode in Figure 10 . However, due to signaling and data deactivation, etc., the signaling connection can be released by the NG-RAN while performing the positioning process.

[0212] The network operation process for measuring the location of the UE will be described in detail with reference to Figure 10 . In step a1, a 5GC entity such as the GMLC can request the serving AMF to provide a location service for measuring the location of the target UE. However, even if the GMLC does not request a location service, based on step 1b, the serving AMF can determine that a location service is needed for measuring the location of the target UE. For example, in order to measure the location of the UE for an emergency call, the serving AMF can determine to directly perform the location service.

[0213] Thereafter, the AMF can send a location service request to the LMF based on step 2, and the LMF can initiate a location process to obtain location measurement data or location measurement assistance data together with the serving ng-eNB and serving gNB. Additionally, based on step 3b, the LMF can initiate a location process for downlink positioning with the UE. For example, the LMF can send the assistance data defined in 3GPP TS 36.355, or can obtain a location estimate or location measurement value. At the same time, step 3b can be additionally performed after step 3a is executed, or can be performed instead of step 3a.

[0214] In step 4, the LMF can provide a location service response to the AMF. Additionally, the location service response can include information on whether the location estimate of the UE is successful and the location estimate value of the UE. Thereafter, if the process is initiated by step a1 Figure 10 , the AMF can transmit the location service response to a 5GC entity such as the GMLC, and if the process is initiated by step 1b Figure 10 , the AMF can use the location service response to provide location services related to emergency calls, etc.

[0215] Figure 11 An example of the protocol layer for supporting the transmission of LTE positioning protocol (LPP) messages between the LMF and the UE based on an embodiment of the present disclosure is shown. Figure 11 The embodiments of can be combined with various embodiments of the present disclosure.

[0216] The LPP PDU can be sent between the AMF and the UE via the NAS PDU. Refer to Figure 11, 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., an LMF in the control plane and an SLP in the user plane). LPP messages can be transmitted in the form of transparent PDUs through an intermediate network interface by using an appropriate protocol such as: NG Application Protocol (NGAP) through the NG-Control Plane (NG-C) interface and NAS / RRC through the NR-Uu interface, etc. The LPP protocol can enable positioning for NR and LTE by using various positioning methods.

[0217] 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. Additionally, LPP messages can be used to indicate the exchange of error information and / or the interruption of the LPP process.

[0218] Figure 12 An example of a protocol layer for supporting NR Positioning Protocol A (NRPPa) PDU transmission between an LMF and an NG-RAN node based on an embodiment of the present disclosure is shown. Figure 12 The embodiments of can be combined with various embodiments of the present disclosure.

[0219] NRPPa can be used for information exchange between an NG-RAN node and an LMF. Specifically, NRPPa can exchange an Enhanced Cell ID (E-CID) for measurement sent from an ng-eNB to the LMF, data for supporting the OTDOA positioning method, and a Cell ID, a Cell Location ID, etc. for the NR Cell ID positioning method. Even without information about an associated NRPPa transaction, the AMF can route NRPPa PDUs through the NG-C interface based on the routing ID of an associated LMR.

[0220] The procedures of the NRPPa protocol for location and data collection can be classified into two types. The first type is UE-related procedures for transmitting information about a specific UE (e.g., location measurement information, etc.), while the second type is non-UE-related procedures for transmitting information applicable to an NG-RAN node and a related TP (e.g., gNB / ng-eNB / TP timing information, etc.). The two types of procedures can be supported independently or simultaneously.

[0221] Meanwhile, examples of positioning methods supported in the NG-RAN can include GNSS, OTDOA, Enhanced Cell ID (E-CID), barometric sensor positioning, WLAN positioning, Bluetooth positioning, and Terrestrial Beacon System (TBS), Uplink Time Difference of Arrival (UTDOA), etc.

[0222] (1) OTDOA (Observed Time Difference of Arrival)

[0223] Figure 13 is a diagram for explaining the OTDOA positioning method based on the embodiments of the present disclosure. Figure 13 The embodiments of can be combined with various embodiments of the present disclosure.

[0224] The OTDOA positioning method uses the measurement timing of the downlink signals received by the UE from the eNB, ng-eNB, and multiple TPs including the PRS dedicated TP. The UE measures the timing of the received downlink signals by using the location assistance data received from the location server. In addition, the location of the UE can be determined based on such measurement results and the geometric coordinates of the neighboring TPs.

[0225] The UE connected to the gNB can request a measurement gap for OTDOA measurement from the TP. If the UE cannot identify the single-frequency network (SFN) of at least one TP in the OTDOA assistance data, the UE can use the autonomous gap to obtain the SNF of the OTDOA reference cell before requesting a measurement gap to perform the reference signal time difference (RSTD) measurement.

[0226] In this document, the 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. That is, the 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.

[0227] For correct OTDOA measurement, it may be necessary to measure the time of arrival (TOA) of the signals received from three or more TPs or BSs that are geographically distributed. 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, the geometric hyperbola can be determined, and the point where these hyperbolas intersect can be estimated as the location of the UE. In this case, since there may be precision and / or uncertainty in each TOA measurement, the estimated location of the UE can be referred to as a specific range based on the measurement uncertainty.

[0228] For example, the RSTD of these two TPs can be calculated based on Equation 1.

[0229] [Equation 1]

[0230]

[0231] In this document, c can be the speed of light, {x t ,yt} can be the (unknown) coordinates of the target UE, {x i , y i} can be the coordinates of the (known) TP, and {x1, y1} can be the coordinates of a reference TP (or another TP). In this document, (T i - T1) can be referred to as the "real time difference (RTD)" which is the transmission time offset between two TPs, and n i and n1 can represent values related to the UE TOA measurement error.

[0232] (2) E-CID (Enhanced Cell ID)

[0233] In the cell ID (CID) positioning method, the location of the UE can be measured through the geographical information of the serving ng-eNB, serving gNB, and / or serving cell of the UE. For example, the geographical information of the serving ng-eNB, serving gNB, and / or serving cell can be obtained through paging, registration, etc.

[0234] Meanwhile, in addition to the CID positioning method, the E-CID positioning method can also use additional UE measurements and / or NG-RAN radio resources, etc. to improve the UE location estimate. In the E-CID positioning method, although some of the measurement methods used in the measurement control system of the RRC protocol can be used, generally additional measurements are not performed solely for the location measurement of the UE. In other words, measurement configurations or measurement control messages may not be additionally provided to measure the location of the UE. Additionally, the UE may not expect to request additional measurement operations solely for location measurement, and can report the measurement values obtained through the measurement methods that the UE can perform measurements in a general manner.

[0235] For example, the serving gNB can use the E-UTRA measurement values provided by the UE to implement the E-CID positioning method.

[0236] Examples of measurement elements that can be used for E-CID positioning can be as follows.

[0237] - 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 Radio Access Network (GERAN) / WLAN reference signal strength indication (RSSI), UTRAN common pilot channel (CPICH) received signal code power (RSCP), UTRAN CPICH Ec / Io

[0238] - E-UTRAN measurements: ng-eNB Rx-Tx time difference, timing advance (TADV), angle of arrival (AoA).

[0239] In this document, TADV can be classified into Type 1 and Type 2 as follows.

[0240] TADV Type 1 = (ng-eNB Rx-Tx time difference) + (UE E-UTRA Rx-Tx time difference)

[0241] TADV Type 2 = ng-eNB Rx-Tx time difference

[0242] Meanwhile, AoA can be used to measure the direction of the UE. AoA can be defined as the estimated angle of the position of the UE relative to the counterclockwise direction from the BS / TP. In this case, the georeference direction can be north. The BS / TP can use uplink signals such as sounding reference signals (SRS) and / or demodulation reference signals (DMRS) for AoA measurement. Additionally, the larger the arrangement of the antenna array, the higher the measurement accuracy of AoA. When the element antenna arrays are arranged at the same interval, the signals received from adjacent antennas can have a constant phase rotation.

[0243] (3) UTDOA (Uplink Time Difference of Arrival)

[0244] UTDOA is a method for determining the position of the UE by estimating the arrival time of the SRS. When the estimated SRS arrival time is calculated, the position of the UE can be estimated by using the serving cell as a reference cell via the time difference of arrival relative to another cell (or BS / TP). To implement UTDOA, the E-SMLC can instruct the serving cell of the target UE to indicate the SRS transmission to the target UE. Additionally, the E-SMLC can provide configurations such as whether the SRS is periodic / aperiodic, bandwidth, frequency / group / sequence hopping, etc.

[0245] (4) Round-Trip Time (RTT)

[0246] RTT is a positioning technology that can measure the distance between two entities even when the times of the target entity and the server entity are not synchronized. If RTT is performed using multiple server entities, the distance to each server entity can be measured individually. Additionally, by drawing circles using the distances measured from each server entity, absolute positioning of the target entity can be performed through the intersection of the circles.

[0247] The RTT between two entities is performed by the following method. Entity #1 can send PRS#1 at t1, and Entity #2 can receive PRS#1 at t2. After Entity #2 receives PRS#1, Entity #2 can send 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.

[0248] D = c × {(t4 - t1) - (t3 - t2)} / 2 (where c is the speed of light)

[0249] For the RTT between the UE and the gNB, the distance between the UE and the gNB can be obtained based on the UE Rx - Tx time difference and the gNB Rx - Tx time difference in the following table using the above formula.

[0250] (5) Two - sided RTT

[0251] 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.

[0252] The method of performing two - sided RTT between two entities is as follows.

[0253] Two - sided RTT is widely used in ultra - wideband (UWB) positioning and can reduce the impact of clock errors.

[0254] Figure 14 is a diagram for explaining two - sided round - trip time (RTT) based on an embodiment of the present disclosure. Figure 14 The embodiments of can be combined with various embodiments of the present disclosure.

[0255] Meanwhile, the propagation delay T (T^) of can be estimated through two measurements (e.g., T round1 , T round2 , T reply1 , T reply2 ). Figure 14 of

[0256] For example, the propagation delay T (T^) can be estimated based on Equation 2.

[0257] [Equation 2]

[0258]

[0259] For example, the propagation delay T (T^) can be estimated based on Equation 3.

[0260] [Equation 3]

[0261]

[0262] And, T round1 × T round2 - T reply1 × T reply2 .

[0263] [Equation 4]

[0264]

[0265] Here, Equation 4 can be the same as Equation 5.

[0266] [Equation 5]

[0267]

[0268] Therefore, the propagation delay T(T^) can be estimated as Equation 6.

[0269] [Equation 6]

[0270]

[0271] In this case, the propagation delay estimation error due to clock error can be obtained based on Equation 7.

[0272] [Equation 7]

[0273]

[0274] Here, e UE1 and e UE2 can be the clock offsets of UE1 and UE2.

[0275] The propagation delay T(T^) can be the estimated propagation delay between UE1 and UE2.

[0276] Table 8 shows an example of the reference signal time difference (RSTD). The RSTD in Table 8 can be applied to SL positioning.

[0277] [Table 8]

[0278]

[0279] Table 9 shows an example of the DL PRS reference signal received power (RSRP). The DL PRS RSRP in Table 9 can be applied to SL positioning.

[0280] [Table 9]

[0281]

[0282] Table 10 shows an example of the DL relative signal time difference (RSTD). The DL RSTD in Table 10 can be applied to SL positioning.

[0283] [Table 10]

[0284]

[0285] Table 11 shows an example of the UE Rx-Tx time difference. The UE Rx-Tx time difference in Table 11 can be applied to SL positioning.

[0286] [Table 11]

[0287]

[0288] Table 12 shows an example of the UL relative time of arrival (UL RTOA) (T UL-RTOA ). The UL RTOA in Table 12 can be applied to SL positioning.

[0289] [Table 12]

[0290]

[0291] Table 13 shows an example of the gNB Rx-Tx time difference. The gNB Rx-Tx time difference in Table 13 can be applied to SL positioning.

[0292] [Table 13]

[0293]

[0294] Table 14 shows an example of the UL angle of arrival (AoA). The UL AoA in Table 14 can be applied to SL positioning.

[0295] [Table 14]

[0296]

[0297] Table 15 shows an example of the UL SRS reference signal received power (RSRP). The UL SRS RSRP in Table 15 can be applied to SL positioning.

[0298] [Table 15]

[0299]

[0300] In the following, a UE procedure for determining a subset of resources to be reported to a higher layer in PSSCH resource selection in sidelink resource allocation mode 2 will be described.

[0301] In resource allocation mode 2, the higher layer is able to request the UE to determine a subset of resources, from which the higher layer will select resources for PSSCH / PSCCH transmission. To trigger this procedure, in time slot n, the higher layer provides the following parameters for this PSSCH / PSCCH transmission:

[0302] - The resource pool from which to report resources;

[0303] - L1 priority, prio TX ;

[0304] - The remaining packet delay budget;

[0305] - The number of sub-channels to be used for PSSCH / PSCCH transmission in a time slot, L subCH ;

[0306] - Optionally, the resource reservation interval, P rsvp_TX , in milliseconds.

[0307] - If the higher layer requests the UE to determine a subset of resources, and the higher layer selects the resources for PSSCH / PSCCH transmission from this subset as part of the re-evaluation or pre-emption process, the higher layer shall provide the set of resources (r0, r1, r2,...) that can withstand re-evaluation and the set of resources (r'0, r'1, r'2,...) that can withstand pre-emption.

[0308] - Depending on the UE implementation to determine the subset of resources as requested by the higher layer before or after time slot r i ”- T3, where r i ” 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 . Here, T SL proc,1 is defined as the number of time slots determined based on the SCS configuration of the SL BWP, where μ SL is the SCS configuration of the SL BWP.

[0309] The following higher layer parameters affect this process:

[0310] - sl-SelectionWindowList: The internal parameter T 2min is set to the corresponding value from the higher layer parameter sl-SelectionWindowList for a given prio TX value.

[0311] - sl-Thres-RSRP-List: This higher layer parameter provides the RSRP threshold for each combination (p i , p j ), where p i is the value of the priority field in the received SCI format 1-A, and p j is the transmission priority of the UE to select resources; for a given invocation of this process, p j = prio TX .

[0312] - sl-RS-ForSensing selects whether the UE uses PSSCH-RSRP or PSCCH-RSRP measurements.

[0313] -sl-ResourceReservePeriodList

[0314] -sl-SensingWindow: The internal parameter T0 is defined as the number of time slots corresponding to sl-SensingWindow milliseconds.

[0315] -sl-TxPercentageList: The internal parameter X for a given prio TX is defined as sl-TxPercentageList(prio TX ) converted from a percentage to a ratio.

[0316] -sl-PreemptionEnable: If sl-PreemptionEnable is provided and it is not equal to "Enabled", the internal parameter prio pre is set to the parameter sl-PreemptionEnable provided by the higher layer.

[0317] If the resource reservation interval P rsvp_TX is provided, it is converted from milliseconds to logical time slot units, resulting in P' rsvp_TX .

[0318] Notation:

[0319] (t' SL 0, t' SL 1, t' SL 2,...) represents the set of time slots belonging to the sidelink resource pool.

[0320] For example, the UE can select a set of candidate resources (S A ) based on Table 16. For example, if resource (re)selection is triggered, the UE can select a set of candidate resources (S A ) based on Table 16. For example, if re-evaluation or preemption is triggered, the UE can select a set of candidate resources (S A ) based on Table 16.

[0321] [Table 16]

[0322]

[0323]

[0324] Meanwhile, according to the prior art, by positioning the symbol for performing automatic gain control (AGC) before the resources for receiving the sidelink (SL) positioning reference signal (PRS), even if the SL PRS intensity transmitted from the peer UE changes due to the change in the distance between the UEs performing positioning, the signal quality or security related to the SL PRS reception of the UE can be improved. In addition, according to the prior art, the UE performing positioning can transmit and receive SL PRS from multiple UEs, and the SL PRS transmitted and received from multiple UEs can be multiplexed within one time slot. However, if the timing of the AGC symbols related to the SL PRS received from multiple UEs is not aligned, the following problems may occur. For example, if the timing of the AGC symbols related to the SL PRS received from multiple UEs is not aligned, it may be difficult for the UE receiving multiple SL PRS to separate the multiple SL PRS, which may cause each SL PRS to be confused or lost. For example, if the timing of the AGC symbols related to the SL PRS received from multiple UEs is not aligned, the interval between the respective symbols of the multiple PRS may be inappropriately configured, which may cause interference or bit errors between the respective symbols. For example, if the timing of the AGC symbols related to the SL PRS received from multiple UEs is not aligned, the signal quality related to the SL PRS reception of the UE may deteriorate, which may reduce the efficiency or reliability of the positioning based on the SL PRS.

[0325] Meanwhile, in conventional Uu link positioning, the PRS symbols are assigned by the base station, but in SL positioning where SL PRS symbols are selected based on UE sensing, there may be a problem that the SL PRS reception performance deteriorates due to resource conflicts between UEs and the characteristics of simultaneous SL PRS transmission and reception.

[0326] In the present disclosure, to solve the above problems, a time slot structure for transmitting and receiving SL PRS, a method and operation for multiplexing multiple SL PRS resources within the SL PRS time slot, and an apparatus supporting the operation are proposed.

[0327] In the present disclosure, to apply two-way round-trip time (RTT) to SL positioning, a method and operation for efficiently using SL transmission resources by flexibly selecting the order of transmitting and receiving SL PRS according to the SL positioning service and transmission channel conditions are proposed.

[0328] In the present disclosure, the following terms can be used.

[0329] - UE-triggered SL positioning: The process of sidelink (SL) positioning triggered by the UE

[0330] - Base station / LMF-triggered SL positioning: The process of SL positioning triggered by the base station / LMF

[0331] - UE-controlled SL positioning: The SL positioning group is the SL positioning generated by the UE

[0332] - Base station-controlled SL positioning: The SL positioning group is the SL positioning generated by the base station

[0333] - UE-based SL positioning: The UE position is the SL positioning calculated by the UE

[0334] - UE-assisted SL positioning: The UE position is the SL positioning calculated by the base station / LMF

[0335] - SL positioning group: The UEs participating in SL positioning

[0336] - Target UE (T-UE): The UE whose position is calculated

[0337] - Server UE (S-UE): The UE that assists the SL positioning of the T-UE

[0338] - MG: The measurement gap that only allows SL PRS transmission

[0339] - MW: The measurement window that can transmit both SL data and SL PRS in a multiplexing manner

[0340] For example, the SL PRS transmission resources may include an SL PRS resource set composed of the following information.

[0341] - SL PRS resource set ID

[0342] - List of SL PRS resource IDs: The list of SL PRS resource IDs within the SL PRS resource set

[0343] - SL PRS resource type: It can be configured as periodic, aperiodic, semi-persistent, or on-demand.

[0344] - Alpha for SL PRS power control

[0345] - P0 for SL PRS power control

[0346] - Path loss reference for SL PRS power control: It can be configured as 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.

[0347] For example, the SL PRS resource set may consist of SL PRS resources including the following information.

[0348] - SL PRS resource ID

[0349] - SL PRS Comb Size: The interval between the REs where the SL PRS is transmitted within a symbol

[0350] - SL PRS Comb Offset: The RE index where the SL PRS is first transmitted in the first SL PRS symbol

[0351] - SL PRS Comb Cyclic Shift: The cyclic shift used to generate the sequence including the SL PRS

[0352] - SL PRS Start Position: The index of the first symbol where the SL PRS is transmitted in a time slot

[0353] - Number of SL PRS Symbols: The number of symbols that constitute the SL PRS in a time slot

[0354] - Frequency Domain Offset: The lowest frequency position (index) where the SL PRS is transmitted in the frequency domain

[0355] - SL PRS BW: The frequency bandwidth used for SL PRS transmission

[0356] - SL PRS Resource Type: It can be configured as periodic or aperiodic, semi-persistent or on-demand

[0357] - SL PRS Periodicity: The period between SL PRS resources in the time domain, or the unit of logical time slots where physical or SL PRS is transmitted in a resource pool

[0358] - SL PRS Offset: The offset in the time domain from the reference timing to the start of the first SL PRS resource, in units of logical time slots where physical or SL PRS is transmitted in a resource pool. The reference timing can be SFN = 0 or DFN = 0 or the time of successful reception or decoding of RRC / MAC-CE / DCI / SCI associated with the SL PRS resource

[0359] - SL PRS Sequence ID

[0360] - SL PRS Spatial Relationship: It can be configured as SL SSB or DL PRS or UL SRS or ULSRS for positioning or PSCCH DMRS or PSSCH DMRS or PSFCH or SL CSI RS, etc

[0361] - SL PRS CCH: The SL PRS control channel (CCH), which can signal SL PRS resource configuration information and resource location, etc

[0362] For example, in the case of multiplexing multiple SL PRS resources within one time slot for SL positioning, the automatic gain control (AGC) time / symbol can be positioned before the first symbol of the SL PRS resource to perform an AGC operation using the received signal level of the SL PRS to receive the SL PRS sent by a specific UE.

[0363] For example, in the case of multiplexing multiple SL PRS resources within one time slot for SL positioning, the transmit / receive switching interval (symbol) (TX / RX switching interval (symbol)) for changing the radio frequency (RF) module to change the UE performing the SL PRS reception operation to the SL PRS transmission operation can be located after the last symbol of the SL PRS resource.

[0364] For example, the above operations / structures can be performed on any single SL PRS resource. Thus, for example, the SL PRS resource can be configured by SL PRS symbols including the AGC time / symbol and the TX / RX switching interval (symbol).

[0365] Figure 15 Shows the SL PRS resource structure based on an embodiment of the present disclosure. Figure 15 The embodiments can be combined with various embodiments of the present disclosure.

[0366] Figure 16 Shows the structure multiplexed within the time slot when multiple SL PRS resources having the SL PRS resource structure are located within the time slot based on an embodiment of the present disclosure. Figure 16 The embodiments can be combined with various embodiments of the present disclosure.

[0367] For example, in the case where the control channel (CCH) related to the SL PRS resource and the SL PRS resource are transmitted together within one time slot, the CCH can be transmitted through the first N symbols after the AGC symbol, i.e., the first symbol within the time slot. For example, the value of N can be configured as a specific configured value. For example, the TX / RX switching interval (symbol) can be transmitted after the N symbols for transmitting the CCH.

[0368] For example, in the case where the CCH related to the SL PRS resource and the SL PRS resource are transmitted together within one time slot, the CCH can be transmitted between the AGC symbol and the first SL PRS symbol in the SL PRS resource structure. For example, the CCH can be transmitted through only one symbol.

[0369] Figure 17 Shows the structure in which the SL PRS based on an embodiment of the present disclosure and the CCH related to the SL PRS resource are transmitted together within one time slot. Figure 17The embodiments may be combined with various embodiments of the present disclosure.

[0370] For example, in a case where the CCH and the SL PRS resource related to the SL PRS resource are transmitted together within one time slot, the CCH may be transmitted only within a frequency range of a specific configuration value between the AGC symbol and the first SL PRS symbol in the above SL PRS resource structure. For example, the CCH may be transmitted only in the frequency domain of the specific configuration value within a specific number of symbols of the specific configuration value.

[0371] Figure 18 Illustrates a structure in which when the SL PRS and the CCH related to the SL PRS resource are transmitted together within one time slot based on an embodiment of the present disclosure, the CCH is transmitted only in a specific frequency domain. Figure 18 The embodiments may be combined with various embodiments of the present disclosure.

[0372] For example, in a case where one or more SL PRS resources are multiplexed within one time slot, all SL PRS configurations related to the SL PRS resources may be the same. For example, the same SL PRS configuration may be pre-configured per resource pool. For example, the same SL PRS configuration may be used within one time slot. For example, different SL PRS configurations may be used between different time slots. For example, the same SL PRS configuration may be used identically within a specific configuration value / threshold time. For example, the specific configuration value / threshold for using the same SL PRS configuration may be pre-configured per resource pool, or configured by a base station or an LMF. For example, the time interval for using the same SL PRS configuration may be indicated as active or deactivated by a base station or an LMF.

[0373] For example, the same SL PRS configuration may be configured by a base station or an LMF as one of multiple SL PRS configurations allowed within a resource pool. For example, a UE participating in SL positioning (e.g., a target UE or an anchor UE) may select the same SL PRS configuration among multiple SL PRS configurations allowed within a resource pool (based on an inter-UE coordination (IUC) message transmitted by another UE or sensing by the UE). For example, all UEs in an SL positioning group configured by a UE participating in a specific SL positioning may use the same SL PRS configuration.

[0374] For example, in a case where one or more SL PRS resources are multiplexed within one time slot, if one or more SL PRS resources (partially or completely) transmitted or received by different UEs overlap, the starting symbol positions of the one or more SL PRS resources may all be aligned. For example, in addition to the above structure, the last symbol positions of the one or more SL PRS resources may also all be aligned.

[0375] For example, in order to enable a UE performing SL positioning to perform phase tracking, etc., based on a (pre)-configured SL PRS configuration, N SL PRS symbols can be added to the SL PRS resource from among the SL PRS symbols configuring the SL PRS resource, and the SL PRS can be transmitted based on the final SL PRS resource after the addition. For example, the value of N can be 1. For example, the value of N can be (pre)-configured to a specific configuration value. For example, the minimum value of the value of N can be (pre)-configured to a specific threshold.

[0376] For example, in the above case, if the value of N is 1, the first SL PRS symbol of the configured SL PRS resource can be repeated before the first SL PRS symbol of the configured SL PRS resource. For example, the last SL PRS symbol of the configured SL PRS resource can be repeated before the first SL PRS symbol of the configured SL PRS resource. For example, the last SL PRS symbol of the configured SL PRS resource can be repeated after the last SL PRS symbol.

[0377] For example, in the above case, when the number of SL PRS symbols of the configured SL PRS resource configured by the SL PRS resource configuration is less than or equal to the SL PRS comb size configured by the SL PRS resource configuration, the operation of adding N SL PRS symbols to the SL PRS resource by repeating can be performed. For example, when the number of SL PRS symbols is greater than the SL PRS comb size, since there already exists a repeated SL PRS comb pattern, the above operation of adding N SL PRS symbols to the SL PRS resource by repeating may not be performed.

[0378] For example, the above operation can be limited to the case where different resource element (RE) offsets are applied to each SL PRS symbol within the SL PRS resource. For example, as described above, it can be (pre)-configured whether to perform the operation of repeating and adding N SL PRS symbols. For example, the default operation is not to add N SL PRS symbols, and N SL PRS symbols are added only when the (pre)-configured operation is performed.

[0379] Figure 19 Shows a structure in which multiple SL PRSs based on embodiments of the present disclosure are multiplexed within one time slot. Figure 19 Embodiments can be combined with various embodiments of the present disclosure.

[0380] Refer to Figure 19, a UE performing SL positioning can transmit and receive multiple SL PRSs. For example, the first SL PRS and the second SL PRS included in the multiple SL PRSs can be based on the same SL PRS configuration. For example, the SL PRS configuration on which the first SL PRS and the second SL PRS are based can include configuration information related to the comb size of the SL PRS or the number of symbols configuring the SL PRS. For example, the comb size of the first SL PRS can be 4, and the number of symbols configuring the first SL PRS can be 4. For example, the comb size of the second SL PRS can be 4, and the number of symbols configuring the second SL PRS can be 4. For example, the multiple SL PRSs can be multiplexed within a time slot period. For example, when the first SL PRS and the second SL PRS included in the multiple SL PRSs are multiplexed within a time slot period, the first symbol among the symbols configuring the first SL PRS can be aligned with the first symbol among the symbols configuring the second SL PRS (1910). Alternatively, for example, when the first SL PRS and the second SL PRS included in the multiple SL PRSs are multiplexed within a time slot period, the timing of the first symbol among the symbols configuring the first SL PRS can be configured to match the timing of the first symbol among the symbols configuring the second SL PRS (1910). For example, when the first SL PRS and the second SL PRS included in the multiple SL PRSs are multiplexed within a time slot period, the last symbol among the symbols configuring the first SL PRS can be aligned with the last symbol among the symbols configuring the second SL PRS (1920). Alternatively, for example, when the first SL PRS and the second SL PRS included in the multiple SL PRSs are multiplexed within a time slot period, the timing of the last symbol among the symbols configuring the first SL PRS can be configured to match the timing of the last symbol among the symbols configuring the second SL PRS (1920). For example, as described above, multiplexing in a manner where multiple SL PRS symbols are aligned or the timing of each symbol is configured to match can be based on the same configuration related to the multiple SL PRSs. For example, based on the comb size of the first SL PRS and the comb size of the second SL PRS each being equal to 4, and the number of symbols configuring the first SL PRS and the number of symbols configuring the second SL PRS each being equal to 4, the first SL PRS and the second SL PRS can be multiplexed within the one time slot period. Meanwhile, for example, symbols for automatic gain control (AGC) can be located before the SL PRS resources. For example, if the first SL PRS and the second SL PRS are multiplexed in the above manner, the AGC symbols for the first SL PRS and the AGC symbols for the second SL PRS can also be aligned.If the first SL PRS and the second SL PRS are multiplexed in the above-described manner, the timing of the AGC symbols for the first SL PRS and the timing of the AGC symbols for the second SL PRS can be configured to match. Thus, for example, even if multiple SL PRSs are multiplexed, problems such as interference and errors that may occur during AGC execution can be prevented by aligning the periods during which AGC is performed.

[0381] Figure 20 Shows a structure in which multiple SL PRSs according to an embodiment of the present disclosure are multiplexed within one time slot. Figure 20 Embodiments of can be combined with various embodiments of the present disclosure.

[0382] Refer to Figure 20 , as above Figure 19 As described above, if multiple SL PRSs are multiplexed within one time slot, they can be multiplexed in such a way that the first symbol and the last symbol of the multiple SL PRSs are aligned. At the same time, for example, with Figure 19Different from the above, among multiple SL PRSs, there may be SL PRSs with different comb sizes or different numbers of symbols. For example, the comb sizes of the first SL PRS and the second SL PRS may be 4, and the number of symbols configured for the first SL PRS and the second SL PRS may be 4. And, for example, the comb sizes of the third SL PRS and the fourth SL PRS may be 4, and the number of symbols configured for the third SL PRS and the fourth SL PRS may be 2. That is, for example, the comb sizes and the number of configured symbols of the first SL PRS and the second SL PRS may be different from those of the third SL PRS and the fourth SL PRS. For example, there may be a case where the first SL PRS, the second SL PRS, the third SL PRS, and the fourth SL PRS as described above are multiplexed within a time slot period. In this case, for example, the first SL PRS and the second SL PRS may be multiplexed within the same time period (2030) within the time slot period, and the third SL PRS and the fourth SL PRS may be multiplexed within the same time period (2060) within the time slot period. That is, for example, multiple SL PRSs with different configurations related to the SL PRS may be multiplexed within one time slot, but only the SL PRSs with the same configuration can be multiplexed within the multiplexing time period within that one time slot. For example, the first SL PRS and the second SL PRS with the same configuration related to the SL PRS may be multiplexed within the same time period (2030) such that the first symbol (2010) and the last symbol (2020) of the first SL PRS and the second SL PRS are aligned. In addition, for example, the third SL PRS and the fourth SL PRS with the same configuration related to the SL PRS may be multiplexed within the same time period (2060) such that the first symbol (2040) and the last symbol (2050) of the third SL PRS and the fourth SL PRS are aligned. Therefore, for example, even if multiple SL PRSs with different configurations related to the SL PRS are multiplexed, the periods for performing AGC can be aligned respectively, thereby preventing problems such as interference and errors that may occur when performing AGC.

[0383] According to various embodiments of the present disclosure, when multiplexing multiple SL PRS resources within an SL PRS time slot, SL PRS multiplexing and configuration conditions that improve SL PRS reception performance without causing AGC problems may be defined.

[0384] For example, it is possible to configure / allow whether to apply a rule and / or parameter values related to the proposed method / rule specifically (or differently or independently) for a service type. For example, it is possible to configure / allow whether to apply a rule and / or parameter values related to the proposed method / rule specifically (or differently or independently) for an (LCH or service) priority. For example, it is possible to configure / allow whether to apply a rule and / or parameter values related to the proposed method / rule specifically (or differently or independently) for QoS requirements (e.g., latency, reliability, minimum communication range). For example, it is possible to configure / allow whether to apply a rule and / or parameter values related to the proposed method / rule specifically (or differently or independently) for PQI parameters. For example, it is possible to configure / allow whether to apply a rule and / or parameter values related to the proposed method / rule specifically (or differently or independently) for an LCH / MAC PDU (transmission) enabling SL HARQ feedback. For example, it is possible to configure / allow whether to apply a rule and / or parameter values related to the proposed method / rule specifically (or differently or independently) for an LCH / MAC PDU (transmission) disabling SL HARQ feedback. For example, it is possible to configure / allow whether to apply a rule and / or parameter values related to the proposed method / rule specifically (or differently or independently) for a CBR measurement value of a resource pool. For example, it is possible to configure / allow whether to apply a rule and / or parameter values related to the proposed method / rule specifically (or differently or independently) for an SL broadcast type (e.g., unicast, multicast, broadcast). For example, it is possible to configure / allow whether to apply a rule and / or parameter values related to the proposed method / rule specifically (or differently or independently) for an SL multicast HARQ feedback option (e.g., NACK-only feedback, ACK / NACK feedback, NACK feedback based only on the TX-RX distance). For example, it is possible to configure / allow whether to apply a rule and / or parameter values related to the proposed method / rule specifically (or differently or independently) for an SL mode 1 CG type (e.g., SL CG type 1 or SL CG type 2). For example, it is possible to configure / allow whether to apply a rule and / or parameter values related to the proposed method / rule specifically (or differently or independently) for an SL mode type (e.g., mode 1 or mode 2). For example, it is possible to configure / allow whether to apply a rule and / or parameter values related to the proposed method / rule specifically (or differently or independently) for a resource pool. For example, it is possible to configure / allow whether to apply a rule and / or parameter values related to the proposed method / rule specifically (or differently or independently) depending on whether a PSFCH resource is configured in a resource pool. For example, it is possible to configure / allow whether to apply a rule and / or parameter values related to the proposed method / rule specifically (or differently or independently) for a source (L2) ID.For example, whether to apply the rules and / or the parameter values related to the proposed method / rules can be specifically (or differently or independently) configured / allowed for the destination (L2) ID. For example, whether to apply the rules and / or the parameter values related to the proposed method / rules can be specifically (or differently or independently) configured / allowed for the PC5 RRC connection link. For example, whether to apply the rules and / or the parameter values related to the proposed method / rules can be specifically (or differently or independently) configured / allowed for the SL link. For example, whether to apply the rules and / or the parameter values related to the proposed method / rules can be specifically (or differently or independently) configured / allowed for the connection state (with the base station) (e.g., RRC connection state, idle state, inactive state). For example, whether to apply the rules and / or the parameter values related to the proposed method / rules can be specifically (or differently or independently) configured / allowed for the SL HARQ process (ID). For example, whether to apply the rules and / or the parameter values related to the proposed method / rules can be specifically (or differently or independently) configured / allowed for whether to perform the SL DRX operation (TX UE or RX UE). For example, whether to apply the rules and / or the parameter values related to the proposed method / rules can be specifically (or differently or independently) configured / allowed for whether the UE is an energy-saving (TX or RX) UE. For example, whether to apply the rules and / or the parameter values related to the proposed method / rules can be specifically (or differently or independently) configured / allowed for the case where PSFCH TX and PSFCH RX (and / or multiple PSFCH TX (beyond UE capabilities)) overlap (and / or the case of skipping PSFCH TX (and / or PSFCH RX)) (from the perspective of a specific UE). For example, whether to apply the rules and / or the parameter values related to the proposed method / rules can be specifically (or differently or independently) configured / allowed for the case where the RX UE actually (successfully) receives the (re)transmission of the PSCCH (and / or PSSCH) from the TX UE).

[0385] For example, in the present disclosure, the term "configured / configuration (or designated / designation)" can be extended / interpreted as the base station notifying the UE through a predefined (physical layer or higher layer) channel / signal (e.g., SIB, RRC, MAC CE) (and / or being provided through pre-configuration and / or the UE notifying other UEs through a predefined (physical layer or higher layer) channel / signal (e.g., SL MAC CE, PC5 RRC)).

[0386] For example, in the present disclosure, the term "PSFCH" may be extended to / interpreted 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 may be used in combination with each other (as a new method).

[0387] For example, in the present disclosure, a specific threshold may refer to a threshold predefined or (pre-)configured by a higher layer (including the application layer) of the network, a base station, or a UE. For example, in the present disclosure, a specific configuration value may refer to a value predefined or (pre-)configured by a higher layer (including the application layer) of the network, a base station, or a UE. For example, an operation configured by the network / base station may refer to the base station (pre-)configuring to the UE through higher layer RRC signaling or the base station configuring / signaling to the UE through MAC CE or the base station signaling to the UE through DCI.

[0388] According to various embodiments of the present disclosure, when multiple SL PRSs transmitted and received by a UE performing SL positioning are multiplexed into one time slot, the start symbol and the end symbol of each SL PRS may be configured to be aligned. That is, for example, if the comb sizes of multiple SL PRSs transmitted and received or the number of symbols of multiple SL PRSs transmitted and received are not all the same, the SL PRSs having the same comb size or the same number of symbols may be configured to be multiplexed, so that the timings of the start symbols and the end symbols of the SL PRSs having the same comb size or the same number of symbols are aligned. Therefore, for example, when a UE performing SL positioning transmits and receives multiple SL PRSs, interference between symbols or bit errors that may occur due to improper configuration of the intervals between the symbols of multiple SL PRSs can be prevented. In addition, for example, when a UE performing SL positioning receives multiple SL PRSs, the timings of AGC symbols related to the multiple SL PRSs may be aligned, thereby preventing problems such as confusion or loss of each SL PRS. In addition, for example, even if the intensities of multiple SL PRSs transmitted and received vary due to changes in the distance between UEs caused by the mobility of the UE performing SL positioning, the quality and stability of the transmitted and received SL PRSs can be improved by aligning the timings of AGC symbols related to the multiple SL PRSs. In addition, for example, a UE performing SL positioning can effectively process multiple SL PRSs whose timings are aligned and multiplexed, thereby preventing conflicts between SL PRSs and distinguishing between multiple SL PRSs. In addition, for example, through the above operations, the efficiency of SL positioning can be improved and the reliability of positioning can be guaranteed.

[0389] Figure 21 A method for a first device to perform wireless communication according to an embodiment of the present disclosure is shown. Figure 21Embodiments can be combined with various embodiments of the present disclosure.

[0390] Referring to Figure 21 , in step S2110, the first device may obtain configuration information related to a sidelink (SL) positioning reference signal (PRS). In step S2120, the first device may transmit a first SL PRS based on the configuration related to the SL PRS. In step S2130, the first device may perform positioning based on the first SL PRS. For example, the first SL PRS and the second SL PRS may be mapped within a time slot, the first symbol of the first SL PRS is aligned with the first symbol of the second SL PRS, and the last symbol of the first SL PRS is aligned with the last symbol of the second SL PRS.

[0391] For example, the comb size of the first SL PRS may be the same as the comb size of the second SL PRS, and the number of symbols of the first SL PRS may be the same as the number of symbols of the second SL PRS.

[0392] For example, the configuration information related to the SL PRS may be used within a threshold time period in a time slot.

[0393] For example, the third SL PRS and the fourth SL PRS may be mapped to a time period within the time slot other than the time period to which the first SL PRS and the second SL PRS are mapped, the first symbol of the third SL PRS is aligned with the first symbol of the fourth SL PRS, and the last symbol of the third SL PRS is aligned with the last symbol of the fourth SL PRS.

[0394] For example, the comb size of the third SL PRS may be the same as the comb size of the fourth SL PRS, and the number of symbols of the third SL PRS may be the same as the number of symbols of the fourth SL PRS.

[0395] For example, the comb sizes of the third SL PRS and the fourth SL PRS may be different from the comb sizes of the first SL PRS and the second SL PRS, and the number of symbols of the third SL PRS and the fourth SL PRS may be different from the number of symbols of the first SL PRS and the second SL PRS.

[0396] For example, the configuration information related to the SL PRS may be configured by a base station or a location management function (LMF) among the configuration information related to multiple SL PRSs configured in a resource pool.

[0397] For example, N symbols identical to the symbols of the first SL PRS may be added to the symbols of the first SL PRS, and N may be greater than or equal to 1.

[0398] For example, based on N being 1, a symbol identical to the last symbol of the first SL PRS can be added to the symbols of the first SL PRS, and the index of the added symbol identical to the last symbol of the first SL PRS can be 1 less than the index of the first symbol of the first SL PRS.

[0399] For example, the number of symbols of the first SL PRS can be based on being equal to or less than the comb size of the first SL PRS.

[0400] For example, within a time slot, the index of the automatic gain control (AGC) symbol associated with the first SL PRS can be 1 less than the index of the first symbol of the first SL PRS.

[0401] For example, the control channel (CCH) associated with the first SL PRS can be located between the AGC symbol and the first symbol of the first SL PRS.

[0402] For example, the CCH associated with the first SL PRS can be transmitted on the configured frequency domain.

[0403] The proposed method can be applied to apparatuses according to various embodiments of the present disclosure. First, the processor 102 of the first apparatus 100 can control the transceiver 106 to obtain configuration information related to the sidelink (SL) positioning reference signal (PRS). And, the processor 102 of the first apparatus 100 can control the transceiver 106 to transmit the first SL PRS based on the configuration related to the SL PRS. And, the processor 102 of the first apparatus 100 can control the transceiver 106 to perform positioning based on the first SL PRS. For example, the first SL PRS and the second SL PRS can be mapped within a time slot, the first symbol of the first SL PRS is aligned with the first symbol of the second SL PRS, and the last symbol of the first SL PRS is aligned with the last symbol of the second SL PRS.

[0404] According to an embodiment of the present disclosure, a first device configured to perform wireless communication is provided. The first device may include: at least one transceiver; at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, these instructions, when executed by the at least one processor, cause the first device to perform operations, including: obtaining configuration information related to a sidelink (SL) positioning reference signal (PRS); transmitting a first SL PRS based on the configuration related to the SL PRS; and performing positioning based on the first SL PRS. For example, the first SL PRS and the second SL PRS may be mapped within a time slot, the first symbol of the first SL PRS is aligned with the first symbol of the second SL PRS, and the last symbol of the first SL PRS is aligned with the last symbol of the second SL PRS.

[0405] According to an embodiment of the present disclosure, a processing device configured to control a first device is provided. The processing device may include: at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, these instructions, when executed by the at least one processor, cause the first device to perform operations, including: obtaining configuration information related to a sidelink (SL) positioning reference signal (PRS); transmitting a first SL PRS based on the configuration related to the SL PRS; and performing positioning based on the first SL PRS. For example, the first SL PRS and the second SL PRS may be mapped within a time slot, the first symbol of the first SL PRS is aligned with the first symbol of the second SL PRS, and the last symbol of the first SL PRS is aligned with the last symbol of the second SL PRS.

[0406] According to an embodiment of the present disclosure, a non-transitory computer-readable storage medium recording instructions is provided. For example, these instructions, when executed, cause the first device to perform operations, including: obtaining configuration information related to a sidelink (SL) positioning reference signal (PRS); transmitting a first SL PRS based on the configuration related to the SL PRS; and performing positioning based on the first SL PRS. For example, the first SL PRS and the second SL PRS may be mapped within a time slot, the first symbol of the first SL PRS is aligned with the first symbol of the second SL PRS, and the last symbol of the first SL PRS is aligned with the last symbol of the second SL PRS.

[0407] Figure 22 A method of performing wireless communication by a second device according to an embodiment of the present disclosure is shown. Figure 22 Embodiments may be combined with various embodiments of the present disclosure.

[0408] Reference Figure 22 As shown in Figure 22 , in step S2210, the second device may obtain configuration information related to a sidelink (SL) positioning reference signal (PRS). In step S2220, the second device may receive a first SL PRS based on the configuration related to the SL PRS. In step S2230, the second device may perform positioning based on the first SL PRS. For example, the first SL PRS and the second SL PRS may be mapped within a time slot, the first symbol of the first SL PRS is aligned with the first symbol of the second SL PRS, and the last symbol of the first SL PRS is aligned with the last symbol of the second SL PRS.

[0409] The proposed method may be applied to a device according to various embodiments of the present disclosure. First, the processor 202 of the second device 200 may control the transceiver 206 to obtain configuration information related to a sidelink (SL) positioning reference signal (PRS). Also, the processor 202 of the second device 200 may control the transceiver 206 to receive a first SL PRS based on the configuration related to the SL PRS. Also, the processor 202 of the second device 200 may control the transceiver 206 to perform positioning based on the first SL PRS. For example, the first SL PRS and the second SL PRS may be mapped within a time slot, the first symbol of the first SL PRS is aligned with the first symbol of the second SL PRS, and the last symbol of the first SL PRS is aligned with the last symbol of the second SL PRS.

[0410] According to an embodiment of the present disclosure, there is provided a second device configured to perform wireless communication. The second device may include: at least one transceiver; at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, these instructions, when executed by the at least one processor, cause the second device to perform operations including: obtaining configuration information related to a sidelink (SL) positioning reference signal (PRS); receiving a first SL PRS based on the configuration related to the SL PRS; and performing positioning based on the first SL PRS. For example, the first SL PRS and the second SL PRS may be mapped within a time slot, the first symbol of the first SL PRS is aligned with the first symbol of the second SL PRS, and the last symbol of the first SL PRS is aligned with the last symbol of the second SL PRS.

[0411] According to an embodiment of the present disclosure, a processing device configured to control a second device is provided. The processing device may include: at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, these instructions, when executed by the at least one processor, cause the second device to perform operations, which include: obtaining configuration information related to a sidelink (SL) positioning reference signal (PRS); receiving a first SL PRS based on the configuration related to the SL PRS; and performing positioning based on the first SL PRS. For example, the first SL PRS and the second SL PRS may be mapped within a time slot, the first symbol of the first SL PRS is aligned with the first symbol of the second SL PRS, and the last symbol of the first SL PRS is aligned with the last symbol of the second SL PRS.

[0412] According to an embodiment of the present disclosure, a non - transitory computer - readable storage medium recording instructions is provided. For example, these instructions, when executed, cause the second device to perform operations, which include: obtaining configuration information related to a sidelink (SL) positioning reference signal (PRS); receiving a first SL PRS based on the configuration related to the SL PRS; and performing positioning based on the first SL PRS. For example, the first SL PRS and the second SL PRS may be mapped within a time slot, the first symbol of the first SL PRS is aligned with the first symbol of the second SL PRS, and the last symbol of the first SL PRS is aligned with the last symbol of the second SL PRS.

[0413] Various embodiments of the present disclosure may be combined with each other.

[0414] Hereinafter, apparatuses to which various embodiments of the present disclosure can be applied will be described.

[0415] The various descriptions, functions, processes, proposals, methods, and / or operation flows of the present disclosure described herein can be applied to, but are not limited to, various fields that require wireless communication / connection (e.g., 5G) between devices.

[0416] 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.

[0417] Figure 23 A communication system 1 based on an embodiment of the present disclosure is shown. Figure 23 The embodiments of can be combined with various embodiments of the present disclosure.

[0418] Refer to Figure 23, a communication system 1 applying various embodiments of the present disclosure includes a wireless device, a base station (BS), and a network. Herein, the wireless device represents 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, without limitation, a robot 100a, vehicles (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, the vehicle may include a vehicle having a wireless communication function, an autonomous vehicle, and a vehicle capable of performing vehicle-to-vehicle communication. Herein, the vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). The XR device may include an augmented reality (AR) / virtual reality (VR) / mixed reality (MR) device and may be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) mounted in a vehicle, a television, a smart phone, a computer, a wearable device, a home appliance device, a digital signage, a vehicle, a robot, etc. The handheld device may include a smart phone, a smart board, a wearable device (e.g., a smart watch or smart glasses), and a computer (e.g., a notebook). The home appliance may include a TV, a refrigerator, and a washing machine. The IoT device may include a sensor and a smart meter. For example, the BS and the 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.

[0419] Here, in addition to LTE, NR, and 6G, the wireless communication technologies implemented in the wireless devices 100a to 100f of the present disclosure may further include narrowband Internet of Things for low-power communication. In this case, for example, the NB-IoT technology may be an example of a low-power wide area network (LPWAN) technology and may be implemented as a standard such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the above names. Additionally or alternatively, the wireless communication technologies implemented in the wireless devices 100a to 100f of the present disclosure may perform communication based on the LTE-M technology. In this case, as an example, the LTE-M technology may be an example of LPWAN and may be referred to by various names including enhanced machine type communication (eMTC), etc. For example, the 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, and is not limited to the above names. Additionally or alternatively, the wireless communication technologies implemented in the wireless devices 100a to 100f of the present disclosure may include at least one of Bluetooth, low-power wide area network (LPWAN), and ZigBee considering low-power communication, and is not limited to the above names. As an example, the ZigBee technology may generate a personal area network (PAN) related to small / low-power digital communication based on various standards including IEEE 802.15.4, etc., and may be referred to by various names.

[0420] The wireless devices 100a to 100f may be connected to the network 300 via the BS200. AI technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI server 400 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although the wireless devices 100a to 100f may communicate with each other via the BS200 / network 300, the wireless devices 100a to 100f may perform direct communication (e.g., sidelink communication) with each other without going through the BS / network. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). IoT devices (e.g., sensors) may perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0421] Wireless communication / connection 150a, 150b, or 150c can be established between wireless devices 100a to 100f / BS200 or BS200 / BS200. Here, the wireless communication / connection can be established through 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 and backhaul (IAB)). The wireless device and the BS / wireless device can send / receive radio signals to / from each other through wireless communication / connections 150a and 150b. For example, wireless communication / connections 150a and 150b can send / receive signals through various physical channels. To this end, at least a part of various configuration information configuration processes, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes for sending / receiving radio signals can be performed based on various proposals of the present disclosure.

[0422] Figure 24 A wireless device according to an embodiment of the present disclosure is shown. Figure 24 Embodiments of can be combined with various embodiments of the present disclosure.

[0423] Referring to Figure 24 , the first wireless device 100 and the second wireless device 200 can send radio signals through various RATs (e.g., LTE and NR). Here, {the first wireless device 100 and the second wireless device 200} can correspond to Figure 23 {wireless device 100x and BS200} and / or {wireless device 100x and wireless device 100x} in

[0424] 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 (one or more) processors 102 may control the (one or more) memories 104 and / or the (one or more) transceivers 106, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operation flows disclosed in this document. For example, the (one or more) processors 102 may process the information in the (one or more) memories 104 to generate first information / signals, and then send radio signals including the first information / signals through the (one or more) transceivers 106. The (one or more) processors 102 may receive radio signals including second information / signals through the transceivers 106, and then store the information obtained by processing the second information / signals in the (one or more) memories 104. The (one or more) memories 104 may be connected to the (one or more) processors 102 and may store various information related to the operation of the (one or more) processors 102. For example, the (one or more) memories 104 may store software codes including commands for executing a part or all of the processes controlled by the (one or more) processors 102 or for executing the descriptions, functions, processes, proposals, methods, and / or operation flows disclosed in this document. Here, the (one or more) processors 102 and the (one or more) memories 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The (one or more) transceivers 106 may be connected to the (one or more) processors 102 and send and / or receive radio signals through the (one or more) antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. The (one or more) transceivers 106 may be used interchangeably with the (one or more) radio frequency (RF) units. In this disclosure, a wireless device may represent a communication modem / circuit / chip.

[0425] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and may additionally include one or more transceivers 206 and / or one or more antennas 208. The (one or more) processors 202 may control the (one or more) memories 204 and / or the (one or more) transceivers 206, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operation procedures disclosed in this document. For example, the (one or more) processors 202 may process the information in the (one or more) memories 204 to generate third information / signals, and then send radio signals including the third information / signals through the (one or more) transceivers 206. The (one or more) processors 202 may receive radio signals including fourth information / signals through the (one or more) transceivers 106, and then store the information obtained by processing the fourth information / signals in the (one or more) memories 204. The (one or more) memories 204 may be connected to the (one or more) processors 202, and may store various information related to the operation of the (one or more) processors 202. For example, the (one or more) memories 204 may store software codes including commands for executing part or all of the processes controlled by the (one or more) processors 202 or for executing the descriptions, functions, processes, proposals, methods, and / or operation procedures disclosed in this document. Here, the (one or more) processors 202 and the (one or more) memories 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The (one or more) transceivers 206 may be connected to the (one or more) processors 202, and send and / or receive radio signals through the (one or more) antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. The (one or more) transceivers 206 may be used interchangeably with the (one or more) RF units. In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0426] Next, the hardware components of wireless devices 100 and 200 will be described in more detail. One or more protocol layers may be implemented by one or more processors 102 and 202, but are not limited thereto. 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 operation flows disclosed in this document. 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 operation flows disclosed in this document. One or more processors 102 and 202 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operation flows disclosed in this document, and provide the generated signals to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive signals (e.g., baseband signals) from one or more transceivers 106 and 206, and obtain PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operation flows disclosed in this document.

[0427] One or more processors 102 and 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer. 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 processor 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, procedures, proposals, methods, and / or operation flows disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, procedures, or functions. The firmware or software configured to execute the descriptions, functions, procedures, proposals, methods, and / or operation 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, and thus driven by one or more processors 102 and 202. The descriptions, functions, procedures, proposals, methods, and / or operation flows disclosed in this document may be implemented using software or firmware in the form of code, commands, and / or command sets.

[0428] One or more memories 104 and 204 may be connected to one or more processors 102 and 202, and may store various types of data, signals, messages, information, programs, code, instructions, and / or commands. One or more memories 104 and 204 may be constituted by read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard drive, register, cache memory, computer-readable storage medium, and / or combinations thereof. One or more memories 104 and 204 may be located inside and / or outside one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 through various technologies such as wired or wireless connections.

[0429] One or more transceivers 106 and 206 may send user data, control information, and / or radio signals / channels mentioned in the methods and / or operation 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 mentioned in the descriptions, functions, processes, proposals, methods, and / or operation 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 send and receive radio signals. For example, one or more processors 102 and 202 may perform control such that one or more transceivers 106 and 206 may send user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may perform control such that one or more transceivers 106 and 206 may 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 send and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operation 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 the received radio signals / channels, etc. from RF band signals to baseband signals 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 the 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 transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0430] Figure 25 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown. Figure 25 Embodiments of may be combined with various embodiments of the present disclosure.

[0431] Referring to Figure 25 , 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. The operations / functions of may be performed Figure 25 without being limited to Figure 24The processor(s) (102, 202) and / or transceiver(s) (106, 206). It can be implemented by Figure 24 the processor(s) (102, 202) and / or transceiver(s) (106, 206) Figure 25 of the hardware components. For example, blocks 1010 to 1060 can be implemented by Figure 24 the processor(s) (102, 202). Alternatively, blocks 1010 to 1050 can be implemented by Figure 24 the processor(s) (102, 202), and block 1060 can be implemented by Figure 24 the transceiver(s) (106, 206).

[0432] It can convert the codeword into a radio signal via Figure 25 the signal processing circuit 1000. Here, the codeword is a sequence of coded bits of an information block. The information block can include transport blocks (e.g., UL-SCH transport block, DL-SCH transport block). The radio signal can be sent through various physical channels (e.g., PUSCH and PDSCH).

[0433] Specifically, the codeword can be converted by the scrambler 1010 into a scrambled bit sequence. 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 by the modulator 1020 into a sequence of modulation symbols. The modulation scheme can 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 sequence of modulation symbols can be mapped by the layer mapper 1030 to one or more transmission layers. The modulation symbols of each transmission layer can be mapped (precoded) by the precoder 1040 to the corresponding antenna port(s). The output z of the precoder 1040 can be obtained by multiplying the output y of the layer mapper 1030 by 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 can perform precoding without performing transform precoding.

[0434] The resource mapper 1050 may map the modulation symbols of each antenna port to time-frequency resources. The time-frequency resources may include a plurality of symbols in the time domain (e.g., CP-OFDMA symbols and DFT-s-OFDMA symbols) and a plurality of subcarriers in the frequency domain. The signal generator 1060 may generate a radio signal from the mapped modulation symbols, and the generated radio signal may be transmitted to other devices through each antenna. To this end, the signal generator 1060 may include an inverse fast Fourier transform (IFFT) module, a cyclic prefix (CP) inserter, a digital-to-analog converter (DAC), and an upconverter.

[0435] It is possible to configure the signal processing process for the signal received in the wireless device in a manner opposite to the Figure 25 signal processing processes (1010 to 1060). For example, a wireless device (e.g., Figure 24 100, 200) may receive a radio signal from the outside through an antenna port / transceiver. The received radio signal may 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 may be restored to a codeword through a resource demapping process, a post-coding process, a demodulation processor, and a descrambling process. The codeword may be restored to the original information block through decoding. Therefore, the signal processing circuit (not illustrated) for the received signal may include a signal restorer, a resource demapper, a post-encoder, a demodulator, a descrambler, and a decoder.

[0436] Figure 26 Another example of a wireless device based on an embodiment of the present disclosure is shown. The wireless device may be implemented in various forms according to use cases / services (refer to Figure 23 ). Figure 26 The embodiments of

[0437] may be combined with various embodiments of the present disclosure. Figure 26 Referring to Figure 24 , the wireless devices (100, 200) may correspond to the Figure 24 wireless devices (100, 200), and may be configured by various elements, components, units / parts, and / or modules. For example, each of the wireless devices (100, 200) may include a communication unit 110, a control unit 120, a storage unit 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 24 one or more processors (102, 202) and / or one or more memories (104, 204) of Figure 24One or more transceivers (106, 206) and / or one or more antennas (108, 208). The 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 may control the electrical / mechanical operations of the wireless device based on programs / codes / commands / information stored in the storage unit 130. The control unit 120 may send the information stored in the storage unit 130 to the outside (e.g., other communication devices) via the communication unit 110 through a wireless / wired interface, or store the information received from the outside (e.g., other communication devices) via the communication unit 110 through a wireless / wired interface in the storage unit 130.

[0438] The additional components 140 may be variously configured according to the type of the wireless device. For example, the additional components 140 may include at least one of a power unit / battery, an input / output (I / O) unit, a driving unit, and a computing unit. The wireless device may be implemented in, but not limited to, the following forms: a robot ( Figure 23 of 100a), a vehicle ( Figure 23 of 100b-1 and 100b-2), an XR device ( Figure 23 of 100c), a handheld device ( Figure 23 of 100d), a household appliance ( Figure 23 of 100e), an IoT device ( Figure 23 of 100f), a digital broadcast terminal, a hologram device, a public safety device, an MTC device, a medical device, a fintech device (or financial device), a security device, a climate / environment device, an AI server / device ( Figure 23 of 400), a BS ( Figure 23 of 200), a network node, etc. According to use cases / services, the wireless device may be used in a mobile or fixed location.

[0439] In Figure 26In the wireless devices (100, 200), all kinds of components, units / parts, and / or modules can be connected to each other through a wired interface, or at least some of them can be wirelessly connected 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 by a wired connection, and the control unit 120 and the first units (e.g., 130, 140) can be wirelessly connected through the communication unit 110. Each component, unit / part, and / or module within the wireless devices (100, 200) can also include one or more elements. For example, the control unit 120 can be constructed by a set of one or more processors. As an example, the control unit 120 can be constructed by a set 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.

[0440] Hereinafter, examples of implementing Figure 26 will be described in detail with reference to the accompanying drawings.

[0441] Figure 27 FIG. shows a handheld device based on an embodiment of the present disclosure. The handheld device can include a smart phone, a smart tablet, a wearable device (e.g., a smart watch or smart glasses), or a portable computer (e.g., a notebook). The handheld device can 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 27 Embodiments of

[0442] Referring to Figure 27 , the handheld device 100 can include an antenna unit (108), a communication unit 110, a control unit 120, a storage unit 130, a power supply unit 140a, an interface unit 140b, and an I / O unit 140c. The antenna unit 108 can be configured as part of the communication unit 110. Blocks 110 to 130 / 140a to 140c respectively correspond to Figure 26 blocks 110 to 130 / 140 of

[0443] The communication unit 110 may transmit and receive signals (e.g., data signals and control signals) to and from other wireless devices or a BS. The control unit 120 may perform various operations by controlling the components of the handheld device 100. The control unit 120 may include an application processor (AP). The storage unit 130 may store data / parameters / programs / codes / commands required to drive the handheld device 100. The storage unit 130 may store input / output data / information. The power supply unit 140a may supply power to the handheld device 100 and includes a wired / wireless charging circuit, a battery, etc. The interface unit 140b may support the connection of the handheld device 100 to other external devices. The interface unit 140b may include various ports for connecting to external devices (e.g., audio I / O ports and video I / O ports). The I / O unit 140c may input or output video information / signals, audio information / signals, data, and / or information input by a user. 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.

[0444] For example, in the case of data communication, the I / O unit 140c may acquire information / signals input by a user (e.g., touch, text, voice, image, or video), and the acquired information / signals may be stored in the storage unit 130. The communication unit 110 may convert the information / signals stored in the memory into a radio signal and directly transmit the converted radio signal to other wireless devices or to a BS. The communication unit 110 may receive a radio signal from other wireless devices or a BS and then restore the received radio signal to the original information / signals. The restored information / signals may be stored in the storage unit 130 and may be output through the I / O unit 140 as various types (e.g., text, voice, image, video, or haptic).

[0445] Figure 28 A vehicle or an autonomous vehicle according to an embodiment of the present disclosure is shown. The vehicle or the autonomous vehicle may be implemented by a mobile robot, an automobile, a train, a manned / unmanned aerial vehicle (AV), a ship, etc. Figure 28 Embodiments of may be combined with various embodiments of the present disclosure.

[0446] Referring to Figure 28 , the vehicle or the autonomous vehicle 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a driving unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 may be configured as part of the communication unit 110. Blocks 110 / 130 / 140a to 140d respectively correspond to Figure 26 blocks 110 / 130 / 140 of

[0447] 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, BSs (e.g., gNBs and roadside units), and servers. The control unit 120 can perform various operations by controlling elements of the vehicle or autonomous vehicle 100. The control unit 120 can include an electronic control unit (ECU). The driving unit 140a can cause the vehicle or autonomous vehicle 100 to travel on the road. The driving unit 140a can include an engine, a motor, a transmission system, wheels, brakes, a steering device, etc. The power supply unit 140b can supply power to the vehicle or autonomous vehicle 100, and can include a wired / wireless charging circuit, a battery, etc. The sensor unit 140c can acquire vehicle status, external environment information, user information, etc. The sensor unit 140c can include an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, a slope sensor, a weight sensor, a heading sensor, a position module, a vehicle forward / backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, a lighting sensor, a pedal position sensor, etc. The autonomous driving unit 140d can implement technologies for maintaining the lane in which the vehicle travels, for automatically adjusting the speed (e.g., adaptive cruise control), for autonomously driving along a determined path, for driving by automatically setting a path when a destination is set, etc.

[0448] 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 a driving plan from the acquired data. The control unit 120 can control the driving 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 acquire the latest traffic information data from the external server non-periodically / periodically, and acquire surrounding traffic information data from adjacent 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 the driving plan based on the newly acquired data / information. The communication unit 110 can transmit information about the vehicle position, the autonomous driving path, and / or the driving plan to the external server. The external server can use AI technology, etc. to predict traffic information data based on the information collected from the vehicle or autonomous vehicle, and provide the predicted traffic information data to the vehicle or autonomous vehicle.

[0449] 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 executed in a device, and the technical features in the device claims can be combined to be implemented or executed in a method. Additionally, the technical features in (one or more) method claims and (one or more) device claims can be combined to be implemented or executed in a device. Additionally, the technical features in (one or more) method claims and (one or more) device claims can be combined to be implemented or executed in a method.

Claims

1. A method for a first device to perform wireless communication, the method comprising: Obtaining configuration information related to a sidelink (SL) positioning reference signal (PRS); Sending a first SL PRS based on the configuration related to the SL PRS; and Performing positioning based on the first SL PRS, wherein the first SL PRS and a second SL PRS are mapped within one time slot, wherein the first symbol of the first SL PRS is aligned with the first symbol of the second SL PRS, and wherein the last symbol of the first SL PRS is aligned with the last symbol of the second SL PRS.

2. The method according to claim 1, wherein The comb size of the first SL PRS is the same as the comb size of the second SL PRS, and wherein the number of symbols of the first SL PRS is the same as the number of symbols of the second SL PRS.

3. The method according to claim 2, wherein The configuration information related to the SL PRS is used during a threshold time period within the time slot.

4. The method according to claim 1, wherein A third SL PRS and a fourth SL PRS are mapped to a time period within the time slot other than the time period to which the first SL PRS and the second SL PRS are mapped, wherein the first symbol of the third SL PRS is aligned with the first symbol of the fourth SL PRS, and wherein the last symbol of the third SL PRS is aligned with the last symbol of the fourth SL PRS.

5. The method according to claim 4, wherein The comb size of the third SL PRS is the same as the comb size of the fourth SL PRS, and wherein the number of symbols of the third SL PRS is the same as the number of symbols of the fourth SL PRS.

6. The method according to claim 5, wherein The comb sizes of the third SL PRS and the fourth SL PRS are different from the comb sizes of the first SL PRS and the second SL PRS, and wherein the number of symbols of the third SL PRS and the fourth SL PRS is different from the number of symbols of the first SL PRS and the second SL PRS.

7. The method according to claim 1, wherein The configuration information related to the SL PRS is configured by a base station or a location management function (LMF) among the configuration information related to a plurality of SL PRSs configured in a resource pool.

8. The method according to claim 1, wherein Adding N symbols identical to the symbols of the first SL PRS to the symbols of the first SL PRS, and wherein the N is greater than or equal to 1.

9. The method according to claim 8, wherein Based on N being 1, adding a symbol identical to the last symbol of the first SL PRS to the symbols of the first SL PRS, and wherein the index of the added symbol identical to the last symbol of the first SL PRS is 1 less than the index of the first symbol of the first SL PRS.

10. The method according to claim 8, wherein, The number of symbols of the first SL PRS is based on being equal to or less than the comb size of the first SL PRS.

11. The method according to claim 1, wherein, Within the time slot, the index of the automatic gain control (AGC) symbol associated with the first SL PRS is 1 less than the index of the first symbol of the first SL PRS.

12. The method according to claim 1, wherein The control channel (CCH) associated with the first SL PRS is located between the AGC symbol and the first symbol of the first SL PRS.

13. The method according to claim 12, wherein, The CCH associated with the first SL PRS is transmitted on the configured frequency domain.

14. A first apparatus adapted to perform wireless communication, the first apparatus comprising: At least one transceiver; At least one processor; And At least one memory connected to the at least one processor and storing instructions, which when executed cause the first apparatus to perform operations, the operations including: Obtaining configuration information related to a sidelink (SL) positioning reference signal (PRS); Transmitting a first SL PRS based on the configuration related to the SL PRS; and Performing positioning based on the first SL PRS, wherein the first SL PRS and the second SL PRS are mapped within one time slot, wherein the first symbol of the first SL PRS is aligned with the first symbol of the second SL PRS, and wherein the last symbol of the first SL PRS is aligned with the last symbol of the second SL PRS.

15. A processing apparatus adapted to control a first apparatus to perform wireless communication, the processing apparatus comprising: At least one processor; And At least one memory connected to the at least one processor and storing instructions, which when executed cause the at least one processor to perform operations, the operations including: Obtaining configuration information related to a sidelink (SL) positioning reference signal (PRS); Transmitting a first SL PRS based on the configuration related to the SL PRS; and Performing positioning based on the first SL PRS, wherein the first SL PRS and the second SL PRS are mapped within one time slot, wherein the first symbol of the first SL PRS is aligned with the first symbol of the second SL PRS, and wherein the last symbol of the first SL PRS is aligned with the last symbol of the second SL PRS.

16. A non-transitory computer-readable storage medium recording instructions, which when executed cause a first apparatus to perform operations, the operations including: Obtaining configuration information related to a sidelink (SL) positioning reference signal (PRS); Transmitting a first SL PRS based on the configuration related to the SL PRS; and Performing positioning based on the first SL PRS, wherein the first SL PRS and the second SL PRS are mapped within one time slot, wherein the first symbol of the first SL PRS is aligned with the first symbol of the second SL PRS, and wherein the last symbol of the first SL PRS is aligned with the last symbol of the second SL PRS.

17. A method for a second device to perform wireless communication, the method comprising: Obtaining configuration information related to a sidelink (SL) positioning reference signal (PRS); Receiving a first SL PRS based on the configuration related to the SL PRS; and Performing positioning based on the first SL PRS, wherein the first SL PRS and a second SL PRS are mapped within one time slot, wherein the first symbol of the first SL PRS is aligned with the first symbol of the second SL PRS, and wherein the last symbol of the first SL PRS is aligned with the last symbol of the second SL PRS.

18. A second device adapted to perform wireless communication, the second device comprising: At least one transceiver; At least one processor; And At least one memory connected to the at least one processor and storing instructions, which when executed cause the second device to perform operations, the operations comprising: Obtaining configuration information related to a sidelink (SL) positioning reference signal (PRS); Receiving a first SL PRS based on the configuration related to the SL PRS; and Performing positioning based on the first SL PRS, wherein the first SL PRS and a second SL PRS are mapped within one time slot, wherein the first symbol of the first SL PRS is aligned with the first symbol of the second SL PRS, and wherein the last symbol of the first SL PRS is aligned with the last symbol of the second SL PRS.

19. A processing device adapted to control a second device to perform wireless communication, the processing device comprising: At least one processor; And At least one memory connected to the at least one processor and storing instructions, which when executed cause the at least one processor to perform operations, the operations comprising: Obtaining configuration information related to a sidelink (SL) positioning reference signal (PRS); Receiving a first SL PRS based on the configuration related to the SL PRS; and Performing positioning based on the first SL PRS, wherein the first SL PRS and a second SL PRS are mapped within one time slot, wherein the first symbol of the first SL PRS is aligned with the first symbol of the second SL PRS, and wherein the last symbol of the first SL PRS is aligned with the last symbol of the second SL PRS.

20. A non-transitory computer-readable storage medium recording instructions, which when executed cause a second device to perform operations, the operations comprising: Obtaining configuration information related to a sidelink (SL) positioning reference signal (PRS); Receiving a first SL PRS based on the configuration related to the SL PRS; and Performing positioning based on the first SL PRS, wherein the first SL PRS and a second SL PRS are mapped within one time slot, Among them, the first symbol of the first SL PRS is aligned with the first symbol of the second SL PRS, and Among them, the last symbol of the first SL PRS is aligned with the last symbol of the second SL PRS.

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