Method and apparatus for performing wireless communication based on PRS

Abstract

A method for a first device to perform wireless communication and a device supporting the same are presented. For example, a first device may obtain information associated with a PRS configuration. For example, the information associated with the PRS configuration may include at least one of information about an ID of a PRS resource, information about an ID of a PRS sequence, information about a start slot of the PRS resource, or information about a start symbol of the PRS resource. For example, a first device may receive a first SL PRS based on a first resource. For example, the first device may transmit a second SL PRS based on a second resource. For example, a second resource may be determined based on information associated with the first resource.

Description

Technical Field

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

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

[0003] In addition, as more and more communication devices require greater communication capacity, the demand for enhanced mobile broadband communication compared to previous radio access technology (RAT) is rising. Therefore, the communication system for reliability and delay-sensitive services or user equipment (UE) is discussed. And, the 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 called new radio access technology (RAT) or new radio (NR). Summary of the invention

[0004] Technical Solution

[0005] According to an embodiment, a method for performing wireless communication by a first device is provided. For example, the first device may obtain information related to a positioning reference signal (PRS) configuration. For example, the information related to the PRS configuration may include at least one of information related to an ID of a PRS resource, information related to an ID of a PRS sequence, information related to a starting time slot of a PRS resource, or information related to a starting symbol of a PRS resource. For example, the first device may receive a first side link (SL) PRS based on a first resource. For example, the first device may send a second SL PRS based on a second resource. For example, the second resource may be determined based on information related to the first resource.

[0006] According to an embodiment, a first device for performing wireless communication may be provided. The first device may include: at least one transceiver; at least one processor; and at least one memory, the at least one memory being connected to the at least one processor and storing instructions, which are executed by the at least one processor to cause the first device to perform operations. For example, the operations include: obtaining information related to a positioning reference signal (PRS) configuration, wherein the information related to the PRS configuration may include at least one of information related to an ID of a PRS resource, information related to an ID of a PRS sequence, information related to a starting time slot of a PRS resource, or information related to a starting symbol of a PRS resource; receiving a first side link (SL) PRS based on a first resource; and sending a second SL PRS based on a second resource, wherein the second resource may be determined based on the information related to the first resource.

[0007] According to an embodiment, an apparatus configured to control a first device may be provided. The apparatus may include: at least one processor; and at least one memory, the at least one memory being connected to the at least one processor and storing instructions, which are executed by the at least one processor to cause the first device to perform operations. For example, these operations include: obtaining information related to a positioning reference signal (PRS) configuration, wherein the information related to the PRS configuration may include at least one of information related to an ID of a PRS resource, information related to an ID of a PRS sequence, information related to a starting time slot of a PRS resource, or information related to a starting symbol of a PRS resource; receiving a first side link (SL) PRS based on a first resource; and sending a second SL PRS based on a second resource, wherein the second resource may be determined based on the information related to the first resource.

[0008] According to an embodiment, a non-transitory computer-readable storage medium storing instructions may be provided. These instructions cause the first device to perform operations based on being executed by at least one processor. For example, the operations include: obtaining information related to a positioning reference signal (PRS) configuration, wherein the information related to the PRS configuration may include at least one of information related to an ID of a PRS resource, information related to an ID of a PRS sequence, information related to a starting time slot of a PRS resource, or information related to a starting symbol of a PRS resource; receiving a first side link (SL) PRS based on a first resource; and sending a second SL PRS based on a second resource, wherein the second resource may be determined based on the information related to the first resource.

[0009] According to an embodiment, a method for performing wireless communication by a second device is provided. For example, the second device may obtain information related to a positioning reference signal (PRS) configuration. For example, the information related to the PRS configuration may include at least one of information related to an ID of a PRS resource, information related to an ID of a PRS sequence, information related to a starting time slot of a PRS resource, or information related to a starting symbol of a PRS resource. For example, the second device may send a first side link (SL) PRS based on a first resource. For example, the second device may receive a second SL PRS based on a second resource. For example, the second resource may be determined based on information related to the first resource.

[0010] According to an embodiment, a second device for performing wireless communication may be provided. The second device may include: at least one transceiver; at least one processor; and at least one memory, the at least one memory being connected to the at least one processor and storing instructions, which are executed by the at least one processor so that the second device performs operations. For example, the operation includes: obtaining information related to a positioning reference signal (PRS) configuration, wherein the information related to the PRS configuration may include at least one of information related to an ID of a PRS resource, information related to an ID of a PRS sequence, information related to a starting time slot of a PRS resource, or information related to a starting symbol of a PRS resource; sending a first side link (SL) PRS based on a first resource; and receiving a second SL PRS based on a second resource, wherein the second resource may be determined based on the information related to the first resource.

[0011] According to an embodiment, a device configured to control a second device may be provided. The device may include: at least one processor; and at least one memory, the at least one memory being connected to the at least one processor and storing instructions, which are executed by the at least one processor so that the second device performs operations. For example, the operations include: obtaining information related to a positioning reference signal (PRS) configuration, wherein the information related to the PRS configuration may include at least one of information related to an ID of a PRS resource, information related to an ID of a PRS sequence, information related to a starting time slot of a PRS resource, or information related to a starting symbol of a PRS resource; sending a first side link (SL) PRS based on a first resource; and receiving a second SL PRS based on a second resource, wherein the second resource may be determined based on the information related to the first resource.

[0012] According to an embodiment, a non-transitory computer-readable storage medium storing instructions may be provided. The instructions are executed by at least one processor to cause the second device to perform operations. For example, the operations include: obtaining information related to a positioning reference signal (PRS) configuration, wherein the information related to the PRS configuration may include at least one of information related to an ID of a PRS resource, information related to an ID of a PRS sequence, information related to a starting time slot of a PRS resource, or information related to a starting symbol of a PRS resource; sending a first side link (SL) PRS based on a first resource; and receiving a second SL PRS based on a second resource, wherein the second resource may be determined based on the information related to the first resource. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A communication structure that can be provided in a 6G system based on an embodiment of the present disclosure is shown.

[0014] Figure 2 The electromagnetic spectrum according to an embodiment of the present disclosure is shown.

[0015] Figure 3 An example of a typical NTN scenario based on transparent payload according to an embodiment of the present disclosure is shown.

[0016] Figure 4 An example of a typical scenario of NTN based on regeneration payload according to an embodiment of the present disclosure is shown.

[0017] Figure 5 An example of a sensing operation based on an embodiment of the present disclosure is shown.

[0018] Figure 6 The structure of a time slot of a frame according to an embodiment of the present disclosure is shown.

[0019] Figure 7 An example of a BWP according to an embodiment of the present disclosure is shown.

[0020] Figure 8 A process of performing V2X or SL communication by a UE based on a resource allocation mode according to an embodiment of the present disclosure is shown.

[0021] Fig. 9 Three types of broadcasts based on embodiments of the present disclosure are shown.

[0022] Fig.10 A synchronization source or synchronization reference of V2X based on an embodiment of the present disclosure is shown.

[0023] Fig.11An example of the architecture of a 5G system capable of locating a UE accessing a next generation radio access network (NG-RAN) or E-UTRAN based on an embodiment of the present disclosure is shown.

[0024] Fig.12 An example of implementing a network for measuring the location of a UE based on an embodiment of the present disclosure is shown.

[0025] Fig.13 An example of a protocol layer for supporting LTE Positioning Protocol (LPP) message transmission between an LMF and a UE based on an embodiment of the present disclosure is shown.

[0026] Fig.14 An example of protocol layers for supporting NR Positioning Protocol A (NRPPa) PDU transmission between LMF and NG-RAN nodes based on an embodiment of the present disclosure is shown.

[0027] Fig.15 It is a diagram for explaining an OTDOA positioning method according to an embodiment of the present disclosure.

[0028] Fig.16 A two-sided RTT according to one embodiment of the present disclosure is shown.

[0029] Fig.17 is a diagram for explaining a method for performing wireless communication related to a PRS according to an embodiment of the present disclosure.

[0030] Fig.18 is a diagram for explaining a process for performing wireless communication related to SL PRS based on an embodiment of the present disclosure.

[0031] Fig.19 A method for a first device to perform wireless communication based on an embodiment of the present disclosure is shown.

[0032] Fig. 20 A method for a second device to perform wireless communication based on an embodiment of the present disclosure is shown.

[0033] Fig.21 A communication system 1 according to an embodiment of the present disclosure is shown.

[0034] Fig. 22 A wireless device according to an embodiment of the present disclosure is shown.

[0035] Fig.23 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown.

[0036] Fig.24 Another example of a wireless device according to an embodiment of the present disclosure is shown.

[0037] Fig.25 A handheld device according to an embodiment of the present disclosure is shown.

[0038] Fig.26 A vehicle or autonomous vehicle according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0039] 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, C".

[0040] A slash ( / ) or a 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".

[0041] In the present disclosure, "at least one of A and B" may mean "only A", "only B", or "both A and B". In addition, in the present disclosure, the expression "at least one of A or B" or "at least one of A and / or B" may be interpreted as "at least one of A and B".

[0042] In addition, in the present disclosure, "at least one of A, B, and C" may mean "only A", "only B", "only C", or "any combination of A, B, and C". In addition, "at least one of A, B, or C" or "at least one of A, B and / or C" may mean "at least one of A, B, and C".

[0043] In addition, brackets used in the present disclosure may mean "for example". Specifically, when indicated as "control information (PDCCH)", this may mean proposing "PDCCH" as an example of "control information". In other words, the "control information" of the present disclosure is not limited to "PDCCH", and "PDDCH" may be proposed as an example of "control information". Specifically, when indicated as "control information (i.e., PDCCH)", this may also mean proposing "PDCCH" as an example of "control information".

[0044] In the following description, "when, if, or in the event of" may be replaced with "based on".

[0045] The technical features respectively described in one drawing in the present disclosure may be implemented separately or may be implemented simultaneously.

[0046] In the present disclosure, the higher layer parameter may be a parameter configured, preconfigured or predefined for the UE. For example, the base station or the network may send the higher layer parameter to the UE. For example, the higher layer parameter may be sent via radio resource control (RRC) signaling or medium access control (MAC) signaling.

[0047] 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 systems based on IEEE 802.16e. UTRA is part of Universal Mobile Telecommunications System (UMTS). 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a part of Evolved UMTS (E-UMTS) using E-UTRA. 3GPP LTE uses OFDMA in the downlink and SC-FDMA in the uplink. LTE-Advanced (LTE-A) is an evolution of LTE.

[0048] 5G NR is a subsequent technology of LTE-A corresponding to a new mobile communication system with high performance, low latency, high availability, etc. 5G NR can use all available spectrum resources including low frequency bands less than 1 GHz, intermediate frequency bands from 1 GHz to 10 GHz, and high frequency (millimeter wave) above 24 GHz.

[0049] The 6G (wireless communication) system has objectives such as (i) very high data rates per device, (ii) very large number of connected devices, (iii) global connectivity, (iv) very low latency, (v) reduced energy consumption of battery-free IoT devices, (vi) ultra-reliable connectivity, and (vii) networked intelligence with machine learning capabilities. The vision of the 6G system may include four aspects such as intelligent connectivity, deep connectivity, holographic connectivity, and ubiquitous connectivity, and the 6G system may meet the requirements shown in Table 1 below. That is, Table 1 shows the requirements of the 6G system.

[0050] [Table 1]

[0051] Peak data rate per device 1Tbps E2E Latency 1ms Maximum spectral efficiency 100bps / Hz Mobility support Up to 1000km / h Satellite Integration Completely AI Completely Autonomous Vehicles Completely XR Completely Tactile communication Completely

[0052] The 6G system may have key factors such as enhanced mobile broadband (eMBB), ultra-reliable and low-latency communications (URLLC), massive machine type communications (mMTC), AI-integrated communications, tactile Internet, high throughput, high network capacity, high energy efficiency, low backhaul and access network congestion, and enhanced data security.

[0053] Figure 1 A communication structure that can be provided in a 6G system based on an embodiment of the present disclosure is shown. Figure 1 The embodiments of the present invention can be combined with various embodiments of the present disclosure.

[0054] The 6G system will have 50 times higher simultaneous wireless communication connectivity than the 5G wireless communication system. URLLC, which is the main function of 5G, will become a more important technology by providing an end-to-end latency of less than 1ms in 6G communication. Unlike the frequently used domain spectrum efficiency, the 6G system can have better volume spectrum efficiency. The 6G system can provide advanced battery technology for energy harvesting and very long battery life, and therefore mobile devices may not need to be charged separately in the 6G system. In 6G, new network characteristics may be as follows.

[0055] -Satellite-integrated network: To provide global mobile constellations, 6G will be integrated with satellites. Integrating ground waves, satellites, and public networks into one wireless communication system could be very important for 6G.

[0056] -Connected Intelligence: Unlike previous generations of wireless communication systems, 6G is innovative, and wireless evolution may be updated from "connected things" to "connected intelligence." AI can be applied in every step of the communication process (or every signal processing process described below).

[0057] - Seamless integration of wireless information and energy transfer: 6G wireless networks can transfer power to facilitate charging the batteries of devices such as smartphones and sensors. Therefore, wireless information and energy transfer (WIET) will be integrated.

[0058] -Ubiquitous hyper-3D connectivity: Access to networks and core network functions from drones and very low earth orbit satellites will establish hyper-3D connectivity in 6G ubiquity.

[0059] Among the new network features of 6G, several general requirements are as follows.

[0060] - Small cell network: The concept of small cell network is introduced to improve the received signal quality as a result of the improvement of the throughput, energy efficiency and spectrum efficiency of the cellular system. Therefore, the small cell network is an essential feature of the 5G and beyond 5G (5GB) communication system. Therefore, the 6G communication system also adopts the characteristics of the small cell network.

[0061] -Ultra-dense heterogeneous network: Ultra-dense heterogeneous network will be another important feature of 6G communication system. Multi-tier network composed of heterogeneous networks improves overall QoS and reduces costs.

[0062] - High Capacity Backhaul: Backhaul connections are characterized by high capacity backhaul networks in order to support high capacity traffic. High speed optical fiber and free space optics (FSO) systems can be possible solutions to this problem.

[0063] - 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.

[0064] -Software and virtualization: Software and virtualization are two important functions that are the basis of the design process in 5GB networks in order to ensure flexibility, reconfigurability and programmability.

[0065] The core implementation technology of the 6G system is described below.

[0066] - Artificial Intelligence (AI): As the most important and newly introduced technology in 6G system is AI. AI is not involved in 4G system. 5G system will support partial or very limited AI. However, 6G system will support AI for full automation. Advances in machine learning will create smarter networks for real-time communication in 6G. When AI is introduced into communication, real-time data transmission can be simplified and improved. AI can use countless analyses to determine methods to perform complex target tasks. That is, AI can increase efficiency and reduce processing delays. Time-consuming operations such as switching, network selection, and resource scheduling can be performed instantly by AI. AI can also play an important role in M2M, machine to human, and human to machine. In addition, AI may be instant communication in brain-computer interface (BCI). AI-based communication systems can be supported by metamaterials, smart structures, smart networks, smart devices, smart cognitive radios, self-maintaining wireless networks, and machine learning.

[0067] -THz (THz) communication: Data rates can be increased by increasing bandwidth. This can be achieved by using sub-TH communications with wide bandwidth and applying advanced massive MIMO technology. THz waves are called submillimeter radiation, generally indicating a frequency band between 0.1THz and 10THz with a corresponding wavelength in the range of 0.03mm to 3mm. The band range of 100GHz to 300GHz (sub-THz band) is considered to be the main part of the THz band for cellular communications. When the sub-THz band is added to the millimeter wave band, the 6G cellular communication capacity increases. 300GHz to 3THz of the defined THz band is in the far infrared (IR) band. The 300GHz to 3THz band is part of the optical band, but is located at the boundary of the optical band and immediately after the RF band. Therefore, the 300GHz to 3THz band has similarities with RF. Figure 2 The electromagnetic spectrum according to an embodiment of the present disclosure is shown. Figure 2 The embodiments of can be combined with various embodiments of the present disclosure. The main features of THz communication include (i) a wide bandwidth that can be used to support very high data rates; and (ii) high path loss occurs 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 BSs operating in this band. Therefore, advanced adaptive placement techniques that can overcome range limitations can be used.

[0068] - Massive MIMO technology (Large MIMO)

[0069] -Holographic Beamforming (HBF)

[0070] -Optical wireless technology

[0071] - Free Space Optical Backhaul Network (FSO Backhaul Network)

[0072] -Non-Terrestrial Network (NTN)

[0073] -Quantum communication

[0074] - No cellular communication

[0075] -Integration of wireless information and power transmission

[0076] -Integration of wireless communication and sensing

[0077] -Integrated access and backhaul network

[0078] -Big Data Analysis

[0079] - Reconfigurable smart surface

[0080] -Metaverse

[0081] -Blockchain

[0082] - Unmanned Aerial Vehicles (UAV): Unmanned aerial vehicles (UAV) or drones will be an important factor in 6G wireless communications. In most cases, UAV technology is used to provide high-speed data wireless connections. A base station entity is installed inside the UAV to provide cellular connectivity. UAVs have certain features not found in fixed base station infrastructure, such as easy deployment, strong line-of-sight links, and freedom of mobility control. During emergencies such as natural disasters, it is economically unfeasible to deploy terrestrial telecommunication infrastructure and sometimes it is impossible to provide services in turbulent environments. UAVs can easily handle such situations. UAVs will become a new paradigm in the field of wireless communications. This technology promotes the three basic requirements of wireless networks, such as eMBB, URLLC, and mMTC. UAVs can also be used for a variety of 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 communications.

[0083] -Autonomous driving (self-driving): In order to achieve perfect autonomous driving, it is necessary to inform each other of dangerous situations through communication between vehicles and vehicles, to check information such as parking information location and signal change time through communication between vehicles and infrastructure such as parking lots and / or traffic lights. Vehicle-to-Everything (V2X) is a core element for building an autonomous driving infrastructure, and is a technology for vehicles to communicate and share with various elements in the road, such as vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I). In order to maximize the performance of autonomous driving and ensure high safety, high transmission speed and low latency technology are required. In addition, in order to directly control vehicles in dangerous situations and actively intervene in vehicle driving at a level beyond warning or guidance messages to the driver, autonomous driving is expected to be maximized in 6G, which has faster transmission speeds and lower latency than 5G, because the amount of information to be sent and received is large.

[0084] For the sake of clarity of the specification, 5G NR is mainly described, but the technical ideas according to the embodiments of the present disclosure are not limited thereto. Various embodiments of the present disclosure can also be applied to 6G communication systems.

[0085] Figure 3 The structure of the NR system based on the embodiment of the present disclosure is shown. Figure 3 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0086] Reference Figure 3, the next generation radio access network (NG-RAN) may include a BS 20 that provides user plane and control plane protocol terminations to the UE 10. For example, the BS 20 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 as other terms such as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), a 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 as other terms such as a base transceiver system (BTS), an access point (AP), etc.

[0087] Figure 3 The embodiment of the present invention illustrates a case where only gNB is included. BS20 may be connected to each other via an Xn interface. BS20 may be connected to each other via a fifth generation (5G) core network (5GC) and an NG interface. More specifically, BS20 may be connected to an access and mobility management function (AMF) 30 via an NG-C interface, and may be connected to a user plane function (UPF) 30 via an NG-U interface.

[0088] The radio interface protocol layer between the UE and the network can be classified into the first layer (L1), the second layer (L2), and the third layer (L3) based on the lower three layers of the open system interconnection (OSI) model known in the communication system. Among them, the physical (PHY) layer belonging to the first layer provides an information transmission service using a physical channel, and the radio resource control (RRC) layer located at 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.

[0089] Figure 4 A radio protocol architecture according to an embodiment of the present disclosure is shown. Figure 4 The embodiments of can be combined with various embodiments of the present disclosure. Specifically, Figure 4 (a) shows a radio protocol stack for the user plane of Uu communication, and Figure 4 (b) in FIG. 5 shows a radio protocol stack of a control plane for Uu communication. Figure 4 (c) in FIG. 1 shows a radio protocol stack of a user plane for SL communication, and Figure 4 (d) in FIG. 5 shows a radio protocol stack of a control plane for SL communication.

[0090] Reference Figure 4, the physical layer provides information transfer services to the upper layer through the physical channel. The physical layer is connected to the medium access control (MAC) layer, which is the upper layer of the physical layer, through the transport channel. Data is transferred between the MAC layer and the physical layer through the transport channel. The transport channel is classified according to how the data is transmitted through the radio interface and what characteristics of the data it transmits.

[0091] Data is transmitted through a physical channel between different physical layers (ie, a PHY layer of a transmitter and a PHY layer of a receiver). The physical channel may be modulated using an Orthogonal Frequency Division Multiplexing (OFDM) scheme, and uses time and frequency as radio resources.

[0092] The MAC layer provides services to the Radio Link Control (RLC) layer via logical channels, and the RLC layer is a higher layer of the MAC layer. The MAC layer provides a function of mapping multiple logical channels to multiple transport channels. The MAC layer also provides a function of logical channel multiplexing by mapping multiple logical channels to a single transport channel. The MAC layer provides data transmission services through logical channels.

[0093] The RLC layer performs concatenation, segmentation, and reassembly of Radio Link Control Service Data Units (RLC SDUs). In order to ensure different Quality of Service (QoS) required by 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).

[0094] The Radio Resource Control (RRC) layer is defined only 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. RBs are logical paths for data transmission between UEs and networks provided by the first layer (i.e., the physical layer or PHY layer) and the second layer (i.e., the MAC layer, the RLC layer, the packet data convergence protocol (PDCP) layer, and the service data adaptation protocol (SDAP) layer).

[0095] The functions of the Packet Data Convergence Protocol (PDCP) in the user plane include transmission, header compression and encryption of user data. The functions of the Packet Data Convergence Protocol (PDCP) in the control plane include transmission and encryption / integrity protection of control plane data.

[0096] The Service Data Adaptation Protocol (SDAP) layer is defined only in the user plane. The SDAP layer performs mapping between Quality of Service (QoS) flows and Data Radio Bearers (DRBs) and QoS Flow ID (QFI) marking in both DL and UL packets.

[0097] Configuration of RB means a process for specifying radio protocol layers and channel attributes to provide a specific service and for determining corresponding detailed parameters and operation methods. RBs can then be classified into two types, namely, signaling radio bearers (SRBs) and data radio bearers (DRBs). SRBs are used as a path for sending RRC messages in the control plane, and DRBs are used as a path for sending user data in the user plane.

[0098] When the RRC connection is established between the RRC layer of the UE and the RRC layer of the E-UTRAN, the UE is in the RRC connected (RRC_CONNECTED) state, otherwise the UE can be in the RRC idle (RRC_IDLE) state. In the case of NR, the RRC inactive (RRC_INACTIVE) state is additionally defined, and the UE in the RRC_INACTIVE state can maintain the connection with the core network and release its connection with the BS.

[0099] 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 sending system information and a downlink shared channel (SCH) for sending other user traffic or control messages. Traffic or control messages for downlink multicast or broadcast services may be sent via a downlink SCH or may be sent via a separate downlink multicast channel (MCH). In addition, uplink transport channels for sending (or transmitting) data from the UE to the network include a random access channel (RACH) for sending initial control messages and an uplink shared channel (SCH) for sending other user traffic or control messages.

[0100] Examples of logical channels belonging to a higher layer of a transport channel and mapped to a transport channel may include a broadcast control channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), a multicast control channel (MCCH), a multicast traffic channel (MTCH), etc.

[0101] Figure 5 The structure of a radio frame of NR according to an embodiment of the present disclosure is shown. Figure 5 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0102] Reference Figure 5In NR, a radio frame can be used to perform uplink and downlink transmissions. The length of a radio frame is 10ms and can be defined as consisting of two half frames (HF). A half frame can include five 1ms subframes (SF). A subframe (SF) can be divided into one or more time slots, and the number of time slots within a subframe can be determined according to the subcarrier spacing (SCS). Each time slot can include 12 or 14 OFDM (A) symbols depending on the cyclic prefix (CP).

[0103] When a normal CP is used, each time slot may include 14 symbols. When an extended CP is used, each time slot may include 12 symbols. Herein, a symbol may include an OFDM symbol (or a CP-OFDM symbol) and a single carrier-FDMA (SC-FDMA) symbol (or a discrete Fourier transform spread OFDM (DFT-s-OFDM) symbol).

[0104] Table 2 shown below represents the number of symbols (N) per slot based on the SCS configuration (μ) in the case of using a normal CP or an extended CP. slot symb ), the number of time slots per frame (N frame,μ slot ) and the number of time slots per subframe (N subframe ,μ slot ).

[0105] [Table 2]

[0106]

[0107] In the NR system, OFDM (A) parameter sets (e.g., SCS, CP length, etc.) between multiple cells integrated into one UE may be configured differently. Therefore, the (absolute time) duration (or interval) of a time resource (e.g., a subframe, a time slot, or a TTI) (collectively referred to as a time unit (TU) for simplicity) consisting of the same number of symbols may be configured differently in the integrated cells.

[0108] In NR, multiple parameter sets or SCSs can be supported to support various 5G services. For example, with an SCS of 15kHz, a wide range of traditional cellular bands can be supported, and with an SCS of 30kHz / 60kHz, dense cities, lower latency, and wider carrier bandwidths can be supported. With an SCS of 60kHz or higher, bandwidths greater than 24.25GHz can be used to overcome phase noise.

[0109] The NR frequency band may be defined as two different types of frequency ranges. The two different types of frequency ranges may be FR1 and FR2. The values ​​of the frequency ranges may be changed (or varied), for example, the two different types of frequency ranges may be as shown in Table 3 below. Among the frequency ranges used in the NR system, FR1 may mean "a range below 6 GHz", and FR2 may mean "a range above 6 GHz", and may also be referred to as millimeter wave (mmW).

[0110] [Table 3]

[0111] Frequency range specification Corresponding frequency range Subcarrier Spacing (SCS) FR1 450MHz-6000MHz 15, 30, 60kHz FR2 24250MHz-52600MHz 60, 120, 240kHz

[0112] As described above, the value of the frequency range in the NR system may be changed (or varied). For example, as shown in Table 4 below, FR1 may include a bandwidth in the range of 410 MHz to 7125 MHz. More specifically, FR1 may 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 may include unlicensed bands. Unlicensed bands may be used for various purposes, for example, unlicensed bands are used for vehicle-specific communications (e.g., autonomous driving).

[0113] [Table 4]

[0114] Frequency range specification Corresponding frequency range Subcarrier Spacing (SCS) FR1 410MHz-7125MHz 15, 30, 60kHz FR2 24250MHz-52600MHz 60, 120, 240kHz

[0115] Figure 6 The structure of the time slot of the NR frame according to an embodiment of the present disclosure is shown. Figure 6 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0116] Reference Figure 6 , a time slot includes multiple symbols in the time domain. For example, in the case of normal CP, one time slot may include 14 symbols. For example, in the case of extended CP, one time slot may include 12 symbols. Alternatively, in the case of normal CP, one time slot may include 7 symbols. However, in the case of extended CP, one time slot may include 6 symbols.

[0117] 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)RBs) in the frequency domain, and a BWP can correspond to a parameter set (e.g., SCS, CP length, etc.). A carrier can include up to N BWPs (e.g., 5 BWPs). Data communication can be performed via an activated BWP. Each element can be referred to as a resource element (RE) in a resource grid, and a complex symbol can be mapped to each element.

[0118] Hereinafter, the bandwidth part (BWP) and the carrier will be described in detail.

[0119] A BWP may be a contiguous set of physical resource blocks (PRBs) within a given parameter set. A PRB may be selected from a contiguous set of common resource blocks (CRBs) for a given parameter set on a given carrier.

[0120] For example, the BWP may be at least any one of an active BWP, an initial BWP, and / or a default BWP. For example, the UE may not monitor the downlink radio link quality in a DL BWP other than an activated DL BWP on a primary cell (PCell). For example, the UE may not receive a PDCCH, a physical downlink shared channel (PDSCH), or a channel state information-reference signal (CSI-RS) (excluding RRM) other than an activated DL BWP. For example, the UE may not trigger a channel state information (CSI) report for an unactivated DL BWP. For example, the UE may not send a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) other than an activated UL BWP. For example, in the case of a downlink, the initial BWP may be given as a set of contiguous RBs for a remaining minimum system information (RMSI) control resource set (CORESET) (configured by a physical broadcast channel (PBCH)). For example, in the case of an uplink, the initial BWP may be given by a system information block (SIB) for a random access procedure. For example, a default BWP may be configured by a higher layer. For example, the initial value of the default BWP may be the initial DL BWP.For power saving, if the UE cannot detect downlink control information (DCI) during a specified period, the UE may switch the UE's active BWP to the default BWP.

[0121] In addition, a BWP can be defined for SL. The same SL BWP can be used in transmission and reception. For example, a transmitting UE can send a SL channel or a SL signal on a specific BWP, and a receiving UE can receive a SL channel or a 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, the UE can receive a configuration for the SL BWP from the BS / network. For example, the UE can receive a configuration for the Uu BWP from the BS / network. SLBWP is (pre-)configured in the carrier for out-of-coverage NR V2X UEs and RRC_IDLE UEs. For UEs in RRC_CONNECTED mode, at least one SL BWP can be activated in the carrier.

[0122] Figure 7 An example of a BWP according to an embodiment of the present disclosure is shown. Figure 7 The embodiments of can be combined with various embodiments of the present disclosure. Figure 7 In an implementation manner, the number of BWPs is 3.

[0123] Reference Figure 7 , a common resource block (CRB) may be a carrier resource block numbered from one end of a carrier frequency band to the other end thereof. Additionally, a PRB may be a resource block numbered within each BWP. Point A may indicate a common reference point of a resource block grid.

[0124] It can be obtained by point A, the offset relative to point A (N start BWP ) and bandwidth (N size BWP ) to configure the BWP. For example, point A can be an external reference point of the PRBs of the carrier, and subcarrier 0 of all parameter sets (e.g., all parameter sets supported by the network on the corresponding carrier) are aligned in 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.

[0125] Hereinafter, V2X or SL communication will be described.

[0126] The side link synchronization signal (SLSS) may include a primary side link synchronization signal (PSSS) and a secondary side link synchronization signal (SSSS) as SL specific sequences. The PSSS may be referred to as a side link primary synchronization signal (S-PSS), and the SSSS may be referred to as a side link secondary synchronization signal (S-SSS). For example, an M sequence of length 127 may be used for the S-PSS, and a Gold sequence of length 127 may be used for the S-SSS. For example, the UE may use the S-PSS for initial signal detection and synchronization acquisition. For example, the UE may use the S-PSS and the S-SSS for acquisition of detailed synchronization and for detection of a synchronization signal ID.

[0127] The physical sidelink broadcast channel (PSBCH) can be a (broadcast) channel for sending default (system) information, which the UE must first know before SL signal transmission / reception. For example, the default information can be information related to SLSS, duplex mode (DM), time division duplex (TDD) uplink / downlink (UL / DL) configuration, information related to resource pool, type of application related to SLSS, subframe offset, broadcast information, etc. For example, in order to evaluate PSBCH performance, in NR V2X, the payload size of PSBCH can be 56 bits, including a 24-bit cyclic redundancy check (CRC).

[0128] S-PSS, S-SSS, and PSBCH can be included in a block format that supports periodic transmission (e.g., SL synchronization signal (SS) / PSBCH block, hereinafter, sidelink synchronization signal block (S-SSB)). The S-SSB can have the same parameter set (i.e., SCS and CP length) as the physical sidelink control channel (PSCCH) / physical sidelink shared channel (PSSCH) in the carrier, and the transmission bandwidth can exist within the (pre-) configured sidelink (SL) BWP. For example, the S-SSB can have a bandwidth of 11 resource blocks (SBs). For example, the PSBCH can exist across 11 RBs. In addition, the frequency position of the S-SSB can be (pre-) configured. Therefore, the UE does not have to perform hypothesis detection at the frequency to discover the S-SSB in the carrier.

[0129] Figure 8 A process of performing V2X or SL communication based on a transmission mode by a UE according to an embodiment of the present disclosure is shown. Figure 8 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure. 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 an LTE transmission mode. In NR, the transmission mode may be referred to as an NR resource allocation mode.

[0130] For example, Figure 8 (a) in FIG. 1 shows UE operations related to LTE transmission mode 1 or LTE transmission mode 3. Alternatively, for example, Figure 8 (a) in FIG. 1 shows UE operations related to NR resource allocation mode 1. For example, LTE transmission mode 1 may be applied to conventional SL communication, and LTE transmission mode 3 may be applied to V2X communication.

[0131] For example, Figure 8 (b) in FIG. 4 shows UE operations related to LTE transmission mode 2 or LTE transmission mode 4. Alternatively, for example, Figure 8 (b) in FIG. 1 shows UE operations related to NR resource allocation mode 2.

[0132] Reference Figure 8 (a), in LTE transmission mode 1, LTE transmission mode 3 or NR resource allocation mode 1, the base station may schedule SL resources to be used by the UE for SL transmission. For example, in step S800, the base station may send information related to the SL resources and / or information related to the UL resources to the first UE. For example, the UL resources may include PUCCH resources and / or PUSCH resources. For example, the UL resources may be resources for reporting SL HARQ feedback to the base station.

[0133] For example, the first UE may receive information related to dynamic grant (DG) resources and / or information related to configuration grant (CG) resources from the base station. For example, the CG resources may include CG type 1 resources or CG type 2 resources. In the present disclosure, the DG resources may be resources configured / allocated to the first UE by the base station through downlink control information (DCI). In the present disclosure, the CG resources may be (periodic) resources configured / allocated to the first UE by the base station through DCI and / or RRC messages. For example, in the case of CG type 1 resources, the base station may send an RRC message including information related to the CG resources to the first UE. For example, in the case of CG type 2 resources, the base station may send an RRC message including information related to the CG resources to the first UE, and the base station may send a DCI related to the activation or release of the CG resources to the first UE.

[0134] In step S810, the first UE may send a PSCCH (e.g., sidelink control information (SCI) or a first-level SCI) to a second UE based on resource scheduling. In step S820, the first UE may send a PSSCH (e.g., a second-level SCI, a MAC PDU, data, etc.) related to the PSCCH to the second UE. In step S830, the first UE may receive a PSFCH related to the PSCCH / PSSCH from the second UE. For example, HARQ feedback information (e.g., NACK information or ACK information) may be received from the second UE via the PSFCH. In step S840, the first UE may send / report the HARQ feedback information to the base station via the PUCCH or PUSCH. For example, the HARQ feedback information reported to the base station may be information generated by the first UE based on the HARQ feedback information received from the second UE. For example, the HARQ feedback information reported to the base station may be information generated by the first UE based on a preconfigured rule. For example, the DCI may be a DCI for SL scheduling. For example, the format of DCI may be DCI format 3_0 or DCI format 3_1.

[0135] Hereinafter, an example of DCI format 3_0 will be described.

[0136] DCI format 3_0 is used for scheduling NR PSCCH and NR PSSCH in one cell.

[0137] The following information is sent via DCI format 3_0 with CRC scrambled by SL-RNTI or SL-CS-RNTI:

[0138] -Resource pool index-ceiling(log 2 I) bits, where I is the number of resource pools used for transmission configured by the higher layer parameter sl-TxPoolScheduling.

[0139] - Time gap - 3 bits determined by the higher layer parameter sl-DCI-ToSL-Trans

[0140] -HARQ process number - 4 bits

[0141] - New data indicator - 1 bit

[0142] - the lowest index of the subchannel allocated to the initial transmission -ceiling(log 2 (N SL subChannel ))Bit

[0143] -SCI format 1-A field: frequency resource assignment, time resource assignment

[0144] -PSFCH-to-HARQ feedback timing indicator -ceiling(log 2 N fb_timing ) bits, where N fb_timing is the number of entries in the higher layer parameter sl-PSFCH-ToPUCCH.

[0145] -PUCCH resource indicator - 3 bits

[0146] - Configuration Index - 0 bit 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.

[0147] - Counter sidelink assignment index - 2 bits, 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

[0148] - Filling bits if necessary

[0149] Reference Figure 8 (b) 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 the preconfigured SL resources. For example, the configured SL resources or the preconfigured SL resources can be a resource pool. For example, the UE can autonomously select or schedule resources for SL transmission. For example, the UE can perform SL communication by autonomously selecting 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 selected resources from the resource pool by itself can send a PSCCH (e.g., sidelink control information (SCI) or a first-level SCI) to a second UE by using the resources. In step S820, the first UE can send a PSSCH (e.g., a second-level SCI, a MAC PDU, data, etc.) related to the PSCCH to the second UE. In step S830, the first UE can receive a PSFCH related to the PSCCH / PSSCH from the second UE.

[0150] Reference Figure 8(a) or (b), for example, the first UE may send the SCI to the second UE via the PSCCH. Alternatively, for example, the first UE may send two consecutive SCIs (e.g., level 2 SCIs) to the second UE via the PSCCH and / or the PSSCH. In this case, the second UE may decode the two consecutive SCIs (e.g., level 2 SCIs) to receive the PSSCH from the first UE. In the present disclosure, the SCI sent via the PSCCH may be referred to as the first SCI, the first SCI, the first level SCI, or the first level SCI format, and the SCI sent via the PSSCH may be referred to as the second SCI, the second SCI, the second level SCI, or the second level SCI format. 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.

[0151] Hereinafter, an example of SCI format 1-A will be described.

[0152] SCI format 1-A is used for scheduling PSSCH and secondary SCI on PSSCH.

[0153] The following information is sent via SCI Format 1-A:

[0154] - Priority - 3 bits

[0155] - Frequency resource assignment - When the value of the higher layer parameter sl-MaxNumPerReserve is configured as 2, the ceiling (log 2 (N SL subChannel (N SL subChannel +1) / 2)) bits; otherwise, when the value of the higher layer parameter sl-MaxNumPerReserve is configured as 3, the ceiling log 2 (N SL subChannel (N SL subChannel +1)(2N SL subChannel +1) / 6) bits.

[0156] - Time Resource Assignment - 5 bits when the higher layer parameter sl-MaxNumPerReserve is configured with a value of 2; otherwise, 9 bits when the higher layer parameter sl-MaxNumPerReserve is configured with a value of 3

[0157] -Resource reservation period - If the higher layer parameter sl-MultiReserveResource is configured, the ceiling(log 2N rsv_period ) bits, where N rsv_period is the number of entries in the higher layer parameter sl-ResourceReservePeriodList; otherwise, 0

[0158] -DMRS pattern -ceiling(log 2 N pattern ) bits, where N pattern is the number of DMRS patterns configured by the higher layer parameter sl-PSSCH-DMRS-TimePatternList

[0159] - Second level SCI format - 2 bits, as defined in Table 5

[0160] - Beta_offset indicator - 2 bits, as provided by the higher layer parameter sl-BetaOffsets2ndSCI

[0161] - Number of DMRS ports - 1 bit, as defined in Table 6

[0162] - Modulation and coding scheme - 5 bits

[0163] - Additional MCS table indicator - 1 bit if one MCS table is configured by the higher layer parameter sl-Additional-MCS-Table; 2 bits if two MCS tables are configured by the higher layer parameter sl-Additional-MCS-Table; otherwise, 0 bit

[0164] -PSFCH overhead indication - 1 bit if higher layer parameter sl-PSFCH-Period = 2 or 4; otherwise, 0 bit

[0165] - Reserved bits - The number of bits determined by the higher layer parameter sl-NumReservedBits, whose value is set to zero.

[0166] [Table 5]

[0167] The value of the second level SCI format field Second level SCI format 00 SCI Format 2-A 01 SCI Format 2-B 10 reserve 11 reserve

[0168] [Table 6]

[0169] Value of the Number of DMRS Ports field Antenna Port 0 1000 1 1000 and 1001

[0170] Hereinafter, an example of SCI format 2-A will be described. SCI format 2-A is used for decoding of PSSCH and is used with HARQ operation when HARQ-ACK information includes ACK or NACK, when HARQ-ACK information includes only NACK, or when there is no feedback of HARQ-ACK information.

[0171] The following information is sent via 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] The value of the broadcast type indicator Broadcast Type 00 broadcast 01 Multicast when HARQ-ACK information includes ACK or NACK 10 Unicast 11 Multicast when HARQ-ACK information includes only NACK

[0182] Hereinafter, an example of SCI format 2-B will be described.

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

[0184] The following information is sent via 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] - Region ID - 12 digits

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

[0193] Reference Figure 8(a) or (b), in step S830, the first UE may receive the PSFCH. For example, the first UE and the second UE may determine the PSFCH resources, and the second UE may send the HARQ feedback to the first UE using the PSFCH resources.

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

[0195] Fig. 9 Three types of broadcasts are shown in accordance with embodiments of the present disclosure. Fig. 9 The embodiments of can be combined with various embodiments of the present disclosure. Specifically, Fig. 9 (a) shows broadcast type SL communication, Fig. 9 (b) in FIG. 4 shows unicast type SL communication, and Fig. 9 (c) shows multicast SL communication. In the case of unicast SL communication, the UE can perform one-to-one communication with another UE. In the case of multicast SL transmission, the UE can perform SL communication with one or more UEs in the group to which the UE belongs. In various embodiments of the present disclosure, SL groupcast communication may be replaced by SL multicast communication, SL one-to-many communication, etc.

[0196] Hereinafter, a hybrid automatic repeat request (HARQ) process will be described.

[0197] For example, SL HARQ feedback may be enabled for unicast. In this case, in non-code block group (non-CBG) operation, if the receiving UE decodes the PSCCH whose target is the receiving UE and if the receiving UE successfully decodes the transport block associated with the PSCCH, the receiving UE may generate a HARQ-ACK. In addition, the receiving UE may send a HARQ-ACK to the transmitting UE. Otherwise, if the receiving UE fails to successfully decode the transport block after decoding the PSCCH whose target is the receiving UE, the receiving UE may generate a HARQ-NACK. In addition, the receiving UE may send a HARQ-NACK to the transmitting UE.

[0198] 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.

[0199] (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 associated with the PSCCH, the receiving UE may send HARQ-NACK to the sending UE through 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 associated with the PSCCH, the receiving UE may not send HARQ-ACK to the sending UE.

[0200] (2) Multicast Option 2: After the receiving UE decodes the PSCCH whose destination is the receiving UE, if the receiving UE cannot decode the transport block associated with the PSCCH, the receiving UE may send HARQ-NACK to the transmitting UE via the PSFCH. In addition, if the receiving UE decodes the PSCCH whose destination is the receiving UE and if the receiving UE successfully decodes the transport block associated with the PSCCH, the receiving UE may send HARQ-ACK to the transmitting UE via the PSFCH.

[0201] For example, if multicast option 1 is used for SL HARQ feedback, all UEs performing multicast communication may share PSFCH resources. For example, UEs belonging to the same group may send HARQ feedback by using the same PSFCH resources.

[0202] For example, if multicast option 2 is used for SL HARQ feedback, each UE performing multicast communication may use different PSFCH resources for HARQ feedback transmission. For example, UEs belonging to the same group may send HARQ feedback by using different PSFCH resources.

[0203] 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.

[0204] In the following, the UE procedure for determining a resource subset to be reported to higher layers in PSSCH resource selection in sidelink resource allocation mode 2 will be described.

[0205] In resource allocation mode 2, higher layers may request the UE to determine a subset of resources from which they will select resources for PSSCH / PSCCH transmission. To trigger this process, in time slot n, higher layers provide the following parameters for PSSCH / PSCCH transmission.

[0206] - the resource pool from which the resource is to be reported;

[0207] -L1 priority, prio TX ;

[0208] - the remaining packet delay budget;

[0209] -The number of subchannels used for PSSCH / PSCCH transmission in a time slot, L subCH ;

[0210] -Optionally, the resource reservation interval P rsvp_TX , in milliseconds.

[0211] - As part of the re-evaluation or pre-emption procedure, if higher layers request the UE to determine a subset of resources from which they will select resources for PSSCH / PSCCH transmission, then the higher layers provide the set of resources that may be subject to re-evaluation (r0, r1, r2, ...) and the set of resources that may be subject to pre-emption (r'0, r'1, r'2, ...).

[0212] -The subset of resources requested by higher layers before or after time slot ri"-T3 is determined by the UE implementation, where ri" is the time slot with the smallest time slot index among (r0, r1, r2, ...) and (r'0, r'1, r'2, ...), and T3 is equal to TSLproc,1, where TSLproc,1 is the time limit number determined based on the SCS configuration of the SL BWP.

[0213] The following higher-level parameters influence this process:

[0214] -sl-SelectionWindowList: internal parameter T 2min is set to come from the TX The corresponding value of the higher-level parameter sl-SelectionWindowList for a given value.

[0215] -sl-Thres-RSRP-List: This higher layer parameter is for each combination (p i , p j ) provides the RSRP threshold, where p i is the value of the priority field in the received SCI format 1-A, p j is the priority with which the UE selects resources for transmission; for a given invocation of this procedure, p j =prio TX .

[0216] -sl-RS-ForSensing selects whether the UE uses PSSCH-RSRP or PSCCH-RSRP measurement.

[0217] -sl-ResourceReservePeriodList

[0218] -sl-SensingWindow: internal parameter T 0 Defined as the number of time slots corresponding to sl-SensingWindow milliseconds

[0219] -sl-TxPercentageList: for a given prio TX The internal parameter X is defined as sl-TxPercentageList(prio) which converts from percentage to ratio. TX )

[0220] -sl-PreemptionEnable: If sl-PreemptionEnable is provided, and if it is not equal to 'enabled', the internal parameter prio pre Set to the parameter sl-PreemptionEnable provided by the higher layer.

[0221] Resource reservation interval P rsvp_TX (if provided) Convert from milliseconds to logical slots, yielding P′ rsvp_TX .

[0222] mark:

[0223] (t′ SL 0 , t′ SL 1 , t′ SL 2 , ...) represents the set of time slots belonging to the side link resource pool.

[0224] For example, the UE may select a candidate resource set (S A For example, when triggering resource (re)selection, the UE may select a candidate resource set (S A For example, when re-evaluation or preemption is triggered, the UE may select a candidate resource set (S A ).

[0225] [Table 8]

[0226]

[0227]

[0228]

[0229]

[0230] On the other hand, partial sensing may be supported for power saving of UE. For example, in LTE SL or LTE V2X, the UE may perform partial sensing based on Table 9 and Table 10.

[0231] [Table 9]

[0232]

[0233]

[0234] [Table 10]

[0235]

[0236]

[0237] Hereinafter, synchronization acquisition of SL UE will be described.

[0238] In time division multiple access (TDMA) and frequency division multiple access (FDMA) systems, accurate time and frequency synchronization is essential. If the time and frequency synchronization is not accurate, the system performance may be degraded due to inter-symbol interference (ISI) and inter-carrier interference (ICI). The same is true for V2X. In V2X, for time / frequency synchronization, the side link synchronization signal (SLSS) can be used in the physical layer, and the master information block-side link-V2X (MIB-SL-V2X) can be used in the radio link control (RLC) layer.

[0239] Fig.10 A synchronization source or synchronization reference of V2X based on an embodiment of the present disclosure is shown. Fig.10 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0240] Reference Fig.10 In V2X, the UE can be synchronized directly with the Global Navigation Satellite System (GNSS), or can be synchronized indirectly with the GNSS through a UE (in or out of network coverage) that is directly synchronized with the GNSS. If the GNSS is configured as a synchronization source, the UE can calculate the Direct Frame Number (DFN) and subframe number by using the Coordinated Universal Time (UTC) and a (pre-)configured Direct Frame Number (DFN) offset.

[0241] Alternatively, the UE may be synchronized directly with the BS, or may be synchronized with another UE that is time / frequency synchronized with the BS. For example, the BS may be an eNB or a gNB. For example, if the UE is within network coverage, the UE may receive synchronization information provided by the BS and may be synchronized directly with the BS. Thereafter, the UE may provide the synchronization information to another adjacent UE. If the BS timing is based on synchronization configuration, for synchronization and downlink measurement, the UE may rely on a cell associated with the corresponding frequency (when it is within cell coverage of the frequency), or a primary cell or a serving cell (when it is outside cell coverage of the frequency).

[0242] The BS (e.g., serving cell) may provide synchronization configuration for the carrier used in V2X or SL communication. In this case, the UE may conform to the synchronization configuration received from the BS. If the UE fails to detect any cell in V2X or SL communication and fails to receive the synchronization configuration from the serving cell, the UE may conform to the pre-configured synchronization configuration.

[0243] Alternatively, the UE may synchronize with another UE that fails to obtain synchronization information directly or indirectly from the BS or GNSS. The synchronization source or preference may be pre-configured to the UE. Alternatively, the synchronization source and preference may be configured via a control message provided by the BS.

[0244] The SL synchronization source may be associated / correlated with the synchronization priority. For example, the relationship between the synchronization source and the synchronization priority may be defined as shown in Table 8 or Table 9. Table 8 or Table 9 is only for example, and the relationship between the synchronization source and the synchronization priority may be defined in various forms.

[0245] [Table 11]

[0246]

[0247] [Table 12]

[0248]

[0249] In Table 11 or Table 12, P0 may represent the highest priority and P6 may represent the lowest priority. In Table 11 or Table 12, the BS may include at least one of a gNB and an eNB. Whether to use GNSS-based synchronization or BS-based synchronization may be (pre-)configured. In single carrier operation, the UE may derive the UE's transmission timing from the available synchronization reference with the highest priority.

[0250] For example, the UE may (re)select a synchronization reference, and the UE may obtain synchronization from the synchronization reference. In addition, the UE may perform SL communication (e.g., PSCCH / PSSCH transmission / reception, physical sidelink feedback channel (PSFCH) transmission / reception, S-SSB transmission / reception, reference signal transmission / reception, etc.) based on the obtained synchronization.

[0251] Hereinafter, positioning will be described.

[0252] Fig.11 An example of an architecture in a 5G system according to an embodiment of the present disclosure is shown, wherein the 5G system is capable of locating a UE accessing a next generation radio access network (NG-RAN) or an E-UTRAN. Fig.11 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0253] Reference Fig.11 , the AMF may receive a request for location services related to a specific target UE from a different entity such as the Gateway Mobile Location Center (GMLC) or may determine that location services are to be initiated in the AMF itself rather than in a specific target UE. The AMF may then send a location service request to the Location Management Function (LMF). Upon receiving the location service request, the LMF may process the location service request and return a processing request including the estimated location of the UE, etc. to the AMF. In addition, if a location service request is received from a different entity such as the GMLC other than the AMF, the AMF may pass the processing request received from the LMF to the different entity.

[0254] The next generation evolved NB (ng-eNB) and gNB are network elements of NG-RAN that can provide measurement results for position estimation, and can measure radio signals for target UEs, and can pass the result values ​​to the LMF. In addition, the ng-eNB can control several transmission points (TPs) such as: remote radio heads or PRS-dedicated TPs that support a beacon system based on positioning reference signals (PRS) for E-UTRA.

[0255] The LMF may be connected to an Enhanced Serving Mobile Location Center (E-SMLC) and the E-SMLC may allow the LMF to access the E-UTRAN. For example, the E-SMLC may allow the LMF to support Observed Time Difference of Arrival (OTDOA), which is one of the positioning methods of the E-UTRAN, by using downlink measurement results obtained by the target UE through signals sent from the gNB and / or PRS dedicated TP in the E-UTRAN.

[0256] In addition, the LMF can be connected to the SUPL Location Platform (SLP). The LMF can support and manage different location determination services for the corresponding target UE. The LMF can interact with the serving ng-eNB or serving gNB for the target UE to obtain the location measurement result of the UE. For the positioning of the target UE, the LMF can determine the positioning method based on the location service (LCS) client type, the requested quality of service (QoS), the UE positioning capability, the gNB positioning capability, and the ng-eNB positioning capability, etc., and can apply such a positioning method to the serving gNB and / or the serving ng-eNB. In addition, the LMF can determine additional information such as the position estimate of the target UE and the accuracy of the position estimate and speed. The SLP is the secure user plane location (SUPL) entity responsible for positioning through the user plane.

[0257] The UE may measure downlink signals through NG-RAN, E-UTRAN and / or other sources such as: different global navigation satellite systems (GNSS) and terrestrial beacon systems (TBS), wireless local access network (WLAN) access points, Bluetooth beacons, UE pressure sensors, etc. The UE may include an LCS application. The UE may communicate with a network that the UE can access, or the LCS application may be accessed through another application included in the UE. The LCS application may include measurement and calculation functions required to determine the position of the UE. For example, the UE may include an independent positioning function such as a global positioning system (GPS), and may report the position of the UE independent of NG-RAN transmission. Positioning information obtained independently in this way may be used as auxiliary information for positioning information obtained from the network.

[0258] Fig.15 An example of implementing a network for measuring the location of a UE based on an embodiment of the present disclosure is shown. Fig.15 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0259] When the UE is in the Connection Management (CM)-Idle state, if the AMF receives a location service request, the AMF may establish a signaling connection with the UE and may request the network to trigger a service to allocate a specific serving gNB or ng-eNB. Fig.12 This operation process is omitted in Fig.12 It is assumed that the UE is in connected mode. However, due to signaling and data deactivation, etc., the signaling connection may be released by the NG-RAN while performing the positioning procedure.

[0260] Will refer to Fig.12The network operation process for measuring the location of the UE is described in detail. In step a1, a 5GC entity such as a GMLC may request a 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 may determine that a location service is required for measuring the location of the target UE. For example, in order to measure the location of a UE for an emergency call, the serving AMF may determine to directly perform the location service.

[0261] Thereafter, the AMF may send a location service request to the LMF based on step 2, and the LMF may initiate a location procedure to obtain location measurement data or location measurement assistance data with the serving ng-eNB and the serving gNB. In addition, based on step 3b, the LMF may initiate a location procedure for downlink positioning with the UE. For example, the LMF may send assistance data defined in 3GPP TS 36.355, or may obtain a location estimate or location measurement value. In addition, step 3b may be performed additionally after performing step 3a, or may be performed instead of step 3a.

[0262] In step 4, the LMF may provide a location service response to the AMF. In addition, the location service response may include information on whether the UE's location estimation is successful and the UE's location estimation value. Fig.12 The AMF may transmit the location service response to the 5GC entity, such as GMLC, and if initiated by step 1b Fig.12 The AMF can use the location service response to provide location services related to emergency calls, etc.

[0263] Fig.13 An example of a protocol layer for supporting LTE Positioning Protocol (LPP) message transmission between an LMF and a UE based on an embodiment of the present disclosure is shown. Fig.13 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0264] LPP PDU can be sent between AMF and UE via NAS PDU. Fig.13 , LPP can be terminated between the target device (e.g., UE in the control plane or SUPL-enabled terminal (SET) in the user plane) and the location server (e.g., LMF in the control plane and SLP in the user plane). LPP messages can be delivered in the form of transparent PDUs through intermediate network interfaces by using appropriate protocols such as: NG Application Protocol (NGAP) through NG-Control Plane (NG-C) interface and NAS / RRC through NR-Uu interface, etc. The LPP protocol can enable positioning for NR and LTE by using various positioning methods.

[0265] For example, based on the LPP protocol, the target device and the location server can exchange mutual capability information, auxiliary data for positioning and / or location information. In addition, the LPP message can be used to indicate the exchange of error information and / or the interruption of the LPP process.

[0266] Fig.14 An example of protocol layers for supporting NR Positioning Protocol A (NRPPa) PDU transmission between LMF and NG-RAN nodes based on an embodiment of the present disclosure is shown. Fig.14 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0267] NRPPa can be used for information exchange between NG-RAN nodes and LMF. Specifically, NRPPa can exchange enhanced cell ID (E-CID) for measurement, data for supporting OTDOA positioning method, and cell ID, cell location ID, etc. for NR cell ID positioning method sent from ng-eNB to LMF. Even if there is no information about the associated NRPPa transaction, AMF can route NRPPa PDU based on the routing ID of the associated LMR through the NG-C interface.

[0268] The procedures of the NRPPa protocol for location and data collection can be classified into two types. The first type is a UE-related procedure for transferring information about a specific UE (e.g., location measurement information, etc.), and the second type is a non-UE-related procedure for transferring information applicable to NG-RAN nodes and related TPs (e.g., gNB / ng-eNB / TP timing information, etc.). Both types of procedures may be supported independently or may be supported simultaneously.

[0269] In addition, examples of positioning methods supported in NG-RAN may include GNSS, OTDOA, enhanced cell ID (E-CID), air pressure sensor positioning, WLAN positioning, Bluetooth positioning and Terrestrial Beacon System (TBS), uplink time difference of arrival (UTDOA), etc.

[0270] (1) OTDOA (Observed Time Difference of Arrival)

[0271] Fig.15 It is a diagram for explaining an OTDOA positioning method according to an embodiment of the present disclosure. Fig.15 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0272] The OTDOA positioning method uses the measurement timing of downlink signals received by the UE from multiple TPs including eNB, ng-eNB, and PRS dedicated TPs. 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.

[0273] A UE connected to a gNB may request measurement gaps for OTDOA measurements from a TP. If the UE cannot identify the single frequency network (SFN) of at least one TP in the OTDOA assistance data, the UE may use autonomous gaps to obtain the SNF of the OTDOA reference cell before requesting measurement gaps to perform reference signal time difference (RSTD) measurements.

[0274] In this article, RSTD can be defined based on the minimum relative time difference between the boundaries of two subframes received from the reference cell and the measurement cell, respectively. That is, 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. In addition, the reference cell can be selected by the UE.

[0275] For correct OTDOA measurement, it may be necessary to measure the time of arrival (TOA) of signals received from three or more TPs or BSs distributed geographically. For example, TOA can be measured for each of TP1, TP2, and TP3, and RSTD of TP1-TP2, RSTD of TP2-TP3, and RSTD of TP3-TP1 can be calculated for the three TOAs. Based on this, a geometric hyperbola can be determined, and the point where these hyperbolas intersect can be estimated as the position of the UE. In this case, since the accuracy and / or uncertainty of each TOA measurement may exist, the estimated position of the UE can be referred to as a specific range based on the measurement uncertainty.

[0276] For example, the RSTD of the two TPs may be calculated based on Equation 1.

[0277] [Equation 1]

[0278]

[0279] In this document, c may be the speed of light, {xt, yt} may be the (unknown) coordinates of the target UE, {xi, yi} may be the coordinates of the (known) TP, and {x1, y1} may be the coordinates of the reference TP (or another TP). In this document, (Ti-T1) may be referred to as the "real time difference (RTD)" as the transmission time offset between two TPs, and ni, n1 may represent values ​​related to the UE TOA measurement error.

[0280] (2) E-CID (Enhanced Cell ID)

[0281] In the cell ID (CID) positioning method, the location of the UE can be measured by the geographic information of the UE's serving ng-eNB, serving gNB and / or serving cell. For example, the geographic information of the serving ng-eNB, serving gNB and / or serving cell can be obtained through paging, registration, etc.

[0282] In addition, 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 position estimate. In the E-CID positioning method, although some of the same measurement methods as those used in the measurement control system of the RRC protocol can be used, additional measurements are generally not performed only for the UE's position measurement. In other words, measurement configurations or measurement control messages may not be additionally provided to measure the UE's position. In addition, the UE may not expect to request additional measurement operations only for position measurement, and may report measurement values ​​obtained by measurement methods that the UE can perform in a general manner.

[0283] For example, the serving gNB may implement the E-CID positioning method using E-UTRA measurements provided from the UE.

[0284] Examples of measurement elements that can be used for E-CID positioning may be as follows.

[0285] -UE measurements: E-UTRA reference signal received power (RSRP), E-UTRA reference signal received quality (RSRQ), UE E-UTRA Rx-Tx time difference, GSM EDGE random access network (GERAN) / WLAN reference signal strength indication (RSSI), UTRAN common pilot channel (CPICH) received signal code power (RSCP), UTRAN CPICH Ec / Io

[0286] -E-UTRAN measurements: ng-eNB Rx-Tx time difference, timing advance (TADV), angle of arrival (AoA).

[0287] Herein, TADVs may be classified into Type 1 and Type 2 as follows.

[0288] TADV type 1 = (ng-eNB Rx-Tx time difference) + (UE E-UTRA Rx-Tx time difference)

[0289] TADV type 2 = ng-eNB Rx-Tx time difference

[0290] In addition, AoA can be used to measure the direction of the UE. AoA can be defined as an estimated angle relative to the position of the UE in a counterclockwise direction from the BS / TP. In this case, the geographic reference direction can be north. The BS / TP can use uplink signals such as sounding reference signals (SRS) and / or demodulation reference signals (DMRS) for AoA measurements. In addition, the larger the antenna array is arranged, the higher the measurement accuracy of AoA. When the element antenna array is arranged at the same interval, the signals received from adjacent antennas can have a constant phase rotation.

[0291] (3) UTDOA (Uplink Time Difference of Arrival)

[0292] UTDOA is a method of determining the location of a UE by estimating the arrival time of an SRS. When the estimated SRS arrival time is calculated, the location of the UE can be estimated by using the serving cell as a reference cell via the arrival time difference relative to another cell (or BS / TP). In order to implement UTDOA, the E-SMLC can indicate the serving cell of the target UE to indicate the SRS transmission to the target UE. In addition, the E-SMLC can provide configurations such as whether the SRS is periodic / aperiodic, bandwidth, frequency / group / sequence hopping, etc.

[0293] (4) RTT (Round Trip Time)

[0294] RTT is a positioning technique that can measure the distance between two entities even when the target entity and the server entity are not in time synchronization. If RTT is performed using multiple server entities, the distance to each server entity is measured, and if a circle is drawn using the distance measured from each server entity, the absolute positioning of the target entity can be performed through the point where the respective circles intersect.

[0295] A method of performing RTT between two entities is as follows: If entity #1 sends PRS #1 at t1, entity #2 receives RRS #1 at t2, entity #2 receives PRS #1, entity #2 sends PRS #2 at t3, and then entity #1 receives PRS #2 at t4, the distance D between the two entities can be obtained as follows.

[0296] D = cx{(t4-t1)-(t3-t2)} / 2 (where c is the speed of light)

[0297] For the RTT between the UE and the gNB, the distance between the UE and the gNB can be obtained based on the above equation using the UE Rx-Tx time difference and the gNB Rx-Tx time difference in the following Tables 16 and 18.

[0298] (5) Bilateral RTT

[0299] 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.

[0300] The method used to perform a two-sided RTT between two entities is as follows,

[0301] Fig.16 A two-sided RTT according to one embodiment of the present disclosure is shown. Fig.16 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0302] According to an embodiment of the present disclosure, for example, Table 13-1 shows an example of a method for performing a two-way round trip time (RTT). For example, the two-way RTT is widely used in ultra-wideband (UWB) positioning and can reduce the impact of clock errors.

[0303] For example, refer to Table 13-1(131) and Fig.16 , can be obtained by two measurements (e.g., T round1 、T round2 、T reply1 、T reply2 ) to estimate the propagation delay T.

[0304] [Table 131]

[0305]

[0306]

[0307] Table 13 shows an example of reference signal time difference (RSTD). The RSTD of Table 13 can be applied to SL positioning.

[0308] [Table 13]

[0309]

[0310] Table 14 shows an example of DL PRS reference signal received power (RSRP). The DL PRS RSRP of Table 14 can be applied to SL positioning.

[0311] [Table 14]

[0312]

[0313] Table 15 shows an example of DL relative signal time difference (RSTD). The DL RSTD of Table 15 can be applied to SL positioning.

[0314] [Table 15]

[0315]

[0316] Table 16 shows an example of UE Rx-Tx time difference. The UE Rx-Tx time difference of Table 16 can be applied to SL positioning.

[0317] [Table 16]

[0318]

[0319] Table 17 shows an example of UL relative time of arrival (UL RTOA) (TUL-RTOA). The UL RTOA of Table 17 can be applied to SL positioning.

[0320] [Table 17]

[0321]

[0322] Table 18 shows an example of gNB Rx-Tx time difference. The gNB Rx-Tx time difference of Table 18 can be applied to SL positioning.

[0323] [Table 18]

[0324]

[0325] Table 19 shows an example of UL angle of arrival (AoA). The UL AoA of Table 19 can be applied to SL positioning.

[0326] [Table 19]

[0327]

[0328] Table 20 shows an example of UL SRS reference signal received power (RSRP). The UL SRS RSRP of Table 17 can be applied to SL positioning.

[0329] [Table 20]

[0330]

[0331] In an embodiment of the present disclosure, a positioning mode may be disclosed. For example, the positioning mode may include independent, UE-based or UE-assisted. For example, independent may represent a positioning mode in which the position of an individual is determined based on GNSS without PRS (without correcting the positioning error through PRS). For example, the X in "X-based" and "X-assisted" may represent a node responsible for positioning calculation (and capable of providing measurements) and a node providing measurements (rather than positioning calculation), respectively. Therefore, for example, the operation in which the measurements used in the calculation of the position estimate are provided by the UE to the LMF can be described as "UE-assisted" (and may also be referred to as "LMF-based"), while the operation in which the UE calculates its own position can be described as "UE-based".

[0332] For example, Table 21 to Table 23 are tables showing examples of PRS assistance data.

[0333] [Table 21]

[0334]

[0335] [Table 22]

[0336]

[0337]

[0338] [Table 23]

[0339]

[0340] In this disclosure, the following terms may be used.

[0341] -UE triggered SL positioning: This process can be triggered by the UE.

[0342] - SL positioning triggered by gNB / LMF - SL positioning controlled by UE: SL positioning group can be created by UE. - SL positioning controlled by UE - SL positioning group is SL positioning created by UE.

[0343] -SL positioning controlled by gNB -SL positioning group is the SL positioning created by gNB.

[0344] -UE-based SL positioning: The UE position can be calculated by the UE.

[0345] -UE-assisted SL positioning: The UE position can be calculated by the base station / LS.

[0346] -SL positioning group: UEs participating in SL positioning

[0347] - Target UE (T-UE): UE whose position is calculated

[0348] - Server UE (S-UE): UE that assists T-UE in SL positioning

[0349] -MG: Measurement gaps that only allow SL PRS transmissions

[0350] -MW: Measurement window capable of sending both SL data and SL PRS in a multiplexed manner

[0351] According to an embodiment of the present disclosure, the SL PRS transmission resources may be configured as a SL PRS resource set configured with the following information.

[0352] SL PRS resource set ID

[0353] SL PRS Resource ID List – List of SL PRS resource IDs in the SL PRS resource set

[0354] SL PRS resource type – can be set as periodic, aperiodic, semi-persistent or on-demand

[0355] Alpha for SL PRS power control

[0356] P0 for SL PRS power control

[0357] Path loss reference for SL PRS power control - can be set to SL SSB or DL ​​PRS or UL SRS or UL SRS or PSCCH DMRS or PSSCH DMRS or PSFCH or SL CSI RS for positioning, etc.

[0358] According to an embodiment of the present disclosure, a SL PRS resource set may be configured as a SL PRS resource configured with the following information.

[0359] SL PRS Resource ID

[0360] SL PRS comb size – the spacing between REs that transmit SL PRS within a symbol

[0361] SL PRS comb offset: the RE index where the SL PRS is first transmitted within the first SL PRS symbol

[0362] SL PRS Comb Cyclic Shift – Cyclic shift used to generate the sequence that makes up the SL PRS

[0363] SL PRS start position - the first symbol index of the SL PRS sent in a time slot

[0364] L PRS # of S symbols - the number of symbols that make up the SL PRS in one time slot

[0365] Frequency domain offset – the lowest frequency position (index) in the frequency domain where the SL PRS is sent

[0366] SL PRS BW - frequency bandwidth used for SL PRS transmission

[0367] SL PRS resource type - can be set to periodic, aperiodic, semi-persistent or on-demand

[0368] SL PRS periodicity - the period in the time domain between SL PRS resources, the logical time slot unit of the resource pool that transmits the physical or SL PRS

[0369] SL PRS Offset - The offset in the time domain until the starting point of the first SL PRS resource based on the reference timing, the resource pool logical time slot unit where the physical or SL PRS is transmitted. The reference timing can be SFN=0 or DFN=0, or the time of successful reception or decoding of the RRC / MAC-CE / DCI / SCI associated with the SL PRS resource.

[0370] SL PRS Sequence ID

[0371] SL PRS spatial relationship - can be set to SL SSB or DL ​​PRS or UL SRS or ULSRS or PSCCH DMRS or PSSCH DMRS or PSFCH or SL CSI RS for positioning

[0372] SL PRS CCH - SL PRS Control Channel. Capable of signaling SL PRS resource configuration information and resource locations.

[0373] In the present disclosure, “determined / determined resources” may be replaced by “is / located resources.” In the present disclosure, “determined resources” may be replaced by “allocated resources.” In the present disclosure, “determined resources” may be replaced by “selected / configured resources.”

[0374] According to an embodiment of the present disclosure, for example, if the resource pool for sending SL PRS signaling for SL positioning operation is different from the resource pool for sending a control channel associated with the SL PRS signaling, it is necessary to define a method for UE to select SLPRS transmission resources based on sensing.

[0375] According to an embodiment of the present disclosure, for example, a method and operation for selecting SL PRS transmission resources in a resource pool that sends an SL PRS signal based on sensing a resource pool that sends a control channel associated with the SL PRS signal, as well as an apparatus supporting the method and operation may be proposed.

[0376] According to an embodiment of the present disclosure, for example, according to the SL positioning operation, if the resource pool 1 or BWP1 that sends the control channel (hereinafter referred to as CCH) associated with the SL PRS is different from the resource pool 2 or BWP2 that sends the SL PRS, the UE can select the SL PRS transmission resource according to the UE's sensing as follows.

[0377] According to an embodiment of the present disclosure, for example, the UE may configure a sensing window, which is an interval for performing sensing for SL PRS transmission resource selection in resource pool 1. According to an embodiment of the present disclosure, for example, the start time of the sensing window may be a time earlier than the trigger time for SL PRS transmission resource selection by a certain threshold, and the end time of the sensing window may be a time earlier than the trigger time by a switching time between resource pools or a switching time between BWPs. According to an embodiment of the present disclosure, for example, the end time of the sensing window may be a time that is earlier than the trigger time by a switching time between resource pools or a switching time between BWPs and before a UE processing time for processing a sensing result.

[0378] According to an embodiment of the present disclosure, for example, the UE may configure a resource selection window consisting of candidate resources for selecting SL PRS transmission resources in resource pool 2. According to an embodiment of the present disclosure, for example, the start time of the resource selection window may be a time after the trigger time for SL PRS resource selection and after the switching time between resource pools or the switching time between BWPs. For example, the start time of the resource selection window may be a time that is later than the trigger time for SL PRS resource selection by the switching time between resource pools or the switching time between BWPs, and may not be a time before the UE processing time for processing resource selection based on the sensing result.

[0379] For example, the CCH sent in resource pool 1 may include information associated with resources of the SL PRS sent in resource pool 2 and / or information for reserved transmission resources associated with the SL PRS sent in resource pool 2.

[0380] For example, resource pool 2 and / or BWP2 may be uniquely configured per cell (cell-specific), or uniquely (pre-) configured for all cells (RAN-specific). For example, resource pool 2 and / or BWP2 may be configured in the form of a (pre-)configured SL measurement gap. For example, resource pool 2 and / or BWP2 may be (pre-)configured as a component of the SL positioning frequency layer (when a SL PRS is sent in a SL measurement gap).

[0381] For example, if UE1 and UE2 perform RTT, the CCH1 sent by UE1 to UE2 may include only information associated with the SL PRS1 resources sent by UE1 to UE2 in resource pool 2 and / or information for reserved transmission resources associated with the sent SL PRS1. For example, as described above, the information on SL PRS2 transmission resources sent by UE2 to UE1 for the SL PRS1 associated with and received may not be sent via CCH1, but may be determined according to a (pre-)configured rule associated with the information on the SL PRS1 transmission resources.

[0382] For example, the start time of the SL PRS2 resources may be (pre)configured after the time of the SL PRS1 resources, or the start time of the SL PRS2 resources may be determined as the earliest SL logical time slot in time after the offset time (in units of SL logical time slots) indicated via CCH1. For example, the RE offset of the SL PRS2 resources may be used identically to the RE offset of the SL PRS1 resources, or may be determined based on the RE offset of the SL PRS1 resources and the layer 1 / layer 2 source / destination ID of UE1 and / or UE2. For example, the comb size of the SL PRS2 resources and / or the number of symbols of the SL PRS2 resources may be determined to be the same as the comb size of the SL PRS1 resources and / or the number of symbols of the SL PRS1 resources.

[0383] According to an embodiment of the present disclosure, for example, UE2 may not send CCH2 associated with SL PRS2 transmission resources from resource pool 1, for example, but may send only SL PRS2 in resource pool 2. For example, a UE sensing CCH1 may estimate information for SL PRS2 resources based on information for SL PRS1 resources, may regard SL PRS2 resources as reserved resources, and / or may exclude SL PRS2 resources from its SL PRS transmission resources.

[0384] According to an embodiment of the present disclosure, for example, if UE1 and UE2 perform bilateral RTT based on SL PRSs sent and received in the order of SL PRS1, SL PRS2, and SL PRS3, CCH1 sent by UE1 to UE2 may include only information associated with SL PRS1 resources sent by UE1 to UE2 in resource pool 2 and information associated with SL PRS3 resources sent by UE1 to UE2 in resource pool 2, and / or may include only information for reserved transmission resources associated with the sent SL PRS1 and the sent SL PRS3. According to an embodiment of the present disclosure, for example, information for SL PRS2 transmission resources sent by UE2 that is associated with SL PRS1 and receives SL PRS1 to UE1 may not be sent via CCH1, for example, but may be determined according to a (pre-)configured rule associated with information for SL PRS1 transmission resources and / or information for SL PRS3 transmission resources.

[0385] According to an embodiment of the present disclosure, for example, the start time of the SLPRS2 resource may be (pre)configured after the time of the SL PRS1 resource, or may be determined as the earliest SL logical time slot in time after the offset time (in units of SL logical time slots) indicated via CCH1. For example, the RE offset of the SL PRS2 resource may be used identically to the RE offset of the SL PRS1 resource, or may be determined based on the RE offset of the SL PRS1 resource and / or the layer 1 / layer 2 source / destination ID of UE1 and / or UE2. For example, the comb size of the SL PRS2 resource and / or the number of symbols of the SL PRS2 resource may be determined to be the same as the comb size of the SL PRS1 resource and / or the number of symbols of the SL PRS1 resource.

[0386] According to an embodiment of the present disclosure, for example, UE2 may not send CCH2 associated with SL PRS2 transmission resources from resource pool 1, but may send SL PRS2 only in resource pool 2. According to an embodiment of the present disclosure, for example, even if the SLPRS2 resources are determined by a (pre)configured rule, the SL PRS2 resources may be subject to resource conflict or preemption (check) due to aperiodic SL PRS transmission, etc., for example (as described above), and reselection of SL PRS2 resources may be performed. For example, if UE2 reselects the SL PRS2 resources determined above, UE2 may send CCH2 associated with information on SL PRS2 resources in resource pool 1 by associating with SL PRS2 transmission performed through the reselected SLPRS2 resources in resource pool 2.

[0387] According to an embodiment of the present disclosure, for example, when bilateral RTT is performed, CCH1 sent by UE1 to UE2 may include only information associated with SL PRS1 resources sent by UE1 to UE2 in resource pool 2 and / or information for reserved transmission resources associated with the sent SL PRS1. According to an embodiment of the present disclosure, for example, information for SL PRS2 transmission resources sent by UE2 that is associated with SL PRS1 and receives SL PRS1 to UE1 may not be sent via CCH1, for example, but may be determined according to (pre-)configured rules associated with information for SL PRS1 transmission resources and / or information for SL PRS3 transmission resources.

[0388] For example, the start time of the SL PRS2 resources may be (pre)configured after the time of the SL PRS1 resources, or the start time of the SL PRS2 resources may be determined as the earliest SL logical time slot in time after the offset time (in units of SL logical time slots) indicated via CCH1. For example, the RE offset of the SL PRS2 resources may be used identically to the RE offset of the SL PRS1 resources, or may be determined based on the RE offset of the SL PRS1 resources and / or the layer 1 / layer 2 source / destination ID of UE1 and / or UE2. For example, the comb size of the SL PRS2 resources and / or the number of symbols of the SL PRS2 resources may be determined to be the same as the comb size of the SL PRS1 resources and / or the number of symbols of the SL PRS1 resources.

[0389] According to an embodiment of the present disclosure, for example, UE2 may not send CCH2 associated with SL PRS2 transmission resources from resource pool 1, but may only send SL PRS2 in resource pool 2.

[0390] For example, the start time of the SL PRS3 resources may be (pre)configured after the start time of the SL PRS2 resources, or may be determined as the earliest SL logical time slot in time after the offset time (in units of SL logical time slots) indicated via CCH1. For example, the RE offset of the SL PRS3 resources may be used identically to the RE offset of the SL PRS2 resources, or may be determined based on the RE offset of the SL PRS2 resources and / or the layer 1 / layer 2 source / destination ID of UE1 and / or UE2. For example, the comb size and / or the number of symbols of the SL PRS3 resources may be determined to be the same as the comb size and / or the number of symbols of the SL PRS2 resources.

[0391] For example, even if UE2 (re)selects SL PRS2 resources, SL PRS3 resources can be determined based on information for SL PRS2 resources so that bilateral RTT may not cause problems such as sorting and conflict between resource times. According to an embodiment of the present disclosure, for example (as described above), if UE2 reselects SLPRS2 resources determined by (pre)configured rules, UE2 can signal information for the reselected SL PRS2 resources and / or information for reserved resources associated with SL PRS2 resources via CCH2 in resource pool 1 by associating with SL PRS2 transmission in resource pool 2.

[0392] For example, the start time of the SL PRS3 resource may be set (in advance) after the start time of the SL PRS1 resource, or the start time of the SL PRS3 resource may be determined as the earliest SL logical time slot in time after the offset time (in units of SL logical time slots) indicated via CCH1. For example, the start time of the SL PRS3 resource may be configured (in advance) after the start time of the SL PRS1 resource, or it may be determined as the earliest SL logical time slot in time after the offset time (in units of SL logical time slots) indicated via CCH1. For example, the RE offset of the SL PRS3 resource may be used identically to the RE offset of the SL PRS1 resource, or may be determined based on the RE offset of the SL PRS1 resource and / or the layer 1 / layer 2 source / destination ID of UE1 and / or UE2. For example (as described above), if UE2 reselects SL PRS2 resources, if the reselected SL PRS2 resources conflict with the SL PRS3 resources determined as described above, or if the time of the reselected SL PRS2 resources is later than the time of the SLPRS3 resources, the UE may discard the SL PRS2 transmission and stop performing bilateral RTT.

[0393] For example (as described above), if the information for the SL PRS resource is determined by the information for other SL PRS resources, (re)selection of other SL PRS resources may not be allowed. For example (as described above), if the information for the SL PRS resource is determined by the information for other SL PRS resources, preemption of other SL PRS resources may not be allowed. For example (as described above), if the information for the SL PRS resource is determined by the information for other SL PRS resources, if the other SL PRS resources conflict with the transmission resources of another UE through non-periodic SL PRS, etc., the UE may discard the SL PRS transmission through other SL PRS resources.

[0394] For example (as described above), if UE1 sends SL PRS1 and SL PRS3 to UE2, and UE2 sends SLPRS2 to UE1 to perform SL two-sided RTT, UE1 can determine the SL PRS1 resources and SL PRS3 resources within resource selection window 1 based on its sensing results, and can, for example, send information reserved for SL PRS3 resources via the CCH associated with SL PRS1 while sending SL PRS1. For example (as described above), resource selection window 1 can be determined based on the time-triggered selection of SL PRS1 resources and SL PRS3 resources and the latency requirements associated with SL two-sided RTT.

[0395] For example (as described above), UE2 receiving SL PRS1 and the CCH associated with SL PRS1 may select resource selection window 2 to send SL PRS2 based on the time of SL PRS1 transmission resources indicated by the CCH associated with SL PRS1 and the time of reserved resources for SL PRS3. For example (as described above), the start time of resource selection window 2 may be determined as a time after a specific threshold time 1 from the time of SL PRS1 resources, and the end time of resource selection window 2 may be determined as a time before a specific threshold time 2 from the time of SL PRS3 resources.

[0396] For example (as described above), the specific threshold time 1 may be determined based on the (maximum) distance between UE1 and UE2. For example, the specific threshold time 1 may be determined as a time that is greater than (a specific threshold value) of the value of the (maximum) distance between UE1 and UE2 converted into time. For example, the (maximum) distance between UE1 and UE2 may be determined based on a SL path loss, which is determined based on a reference signal received by UE2 from UE1. For example, the (maximum) distance between UE1 and UE2 may be determined based on the area ID information of UE1 (as indicated by the CCH associated with the SL PRS1 received by UE2 from UE1) and the location (or area ID) of UE2 itself.

[0397] For example (as described above), the specific threshold time 2 may be determined based on the (maximum) distance between UE1 and UE2. For example, the specific threshold time 2 may be determined as a time that is greater than (a specific threshold value) of the value of the (maximum) distance between UE1 and UE2 converted into time. For example, the (maximum) distance between UE1 and UE2 may be determined based on a SL path loss, which is determined based on a reference signal received by UE2 from UE1. For example, the (maximum) distance between UE1 and UE2 may be determined based on the area ID information of UE1 (as indicated by the CCH associated with the SL PRS1 received by UE2 from UE1) and the location (or area ID) of UE2 itself.

[0398] For example, the specific threshold time 1 and the specific threshold time 2 may be the same value. For example, the specific threshold time 1 and / or the specific threshold time 2 may be values ​​(pre-)configured by the base station or the network.

[0399] For example, after selecting the SL PRS2 resource (as described above), if the SL PRS2 resource is reselected by re-evaluating and / or preempting the SL PRS2 resource, the resource selection window for the reselected resource may be determined to be the same as the resource selection window 2. For example, the candidate resources for reselecting the SL PRS2 resource may be determined to be the same as the candidate resources determined for initially selecting the SL PRS2 resource.

[0400] According to various embodiments of the present disclosure, for example, if the resource pool for sending the SL PRS signal for the SL positioning operation is different from the resource pool for sending the control channel associated with the SL PRS signal, a method for selecting SLPRS transmission resources in the resource pool for sending the SL PRS signal can be proposed based on sensing of the resource pool from which the control channel associated with the SL PRS signal is sent.

[0401] Fig.17 is a diagram for explaining a method for performing wireless communication related to a PRS according to an embodiment of the present disclosure. Fig.17 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0402] Reference Fig.17 According to an embodiment of the present disclosure, for example, the target UE may be a UE being positioned / Secure User Plane Location (SUPL) enabled terminal (SUPL SET). For example, at least one server UE / location server (e.g., base station, location management function (LMF), transmit-receive point (TRP), enhanced serving mobile location center (E-SMLC), secure user plane location (SUPL) location platform (SLP), etc.) may be a physical or logical entity that assists, requests or manages positioning for the target UE.

[0403] For example, RTT / bilateral RTT positioning can be performed. For example, the target UE can send a first SL PRS to the server UE at time T1-1. For example, the server UE can receive a first SL PRS from the target UE at time T1-2. For example, the server UE can send a second SL PRS to the target UE at time T2-1. For example, the target UE can receive a second SL PRS from the server UE at time T2-2. For example, the target UE can send a third SL PRS (or a first SL PRS) to the server UE at time T3-1. For example, the server UE can receive a third SL PRS (or a first SL PRS) from the target UE at time T3-2. For example, RTT positioning for the target UE can be performed based on T1-1, T1-2, T2-1, and T2-2. For example, dual RTT positioning for the target UE can be performed based on T1-1, T1-2, T2-1, T2-2, T3-1, and T3-2.

[0404] For example, resources for the first SLPRS / third SL PRS may be configured / selected based on the Mode 1 resource allocation mode / Mode 2 resource allocation mode.

[0405] For example, for the first SL PRS, the number of physical resource blocks (PRBs) allocated for the SL PRS resources within the SL PRS resource set can be defined (e.g., 12). For example, the SL PRS resource elements (REs) can be allocated within the time slot. For example, the starting symbol of the SL PRS resource can be defined (e.g., 3 (based on 0)). For example, the number of symbols of the SL PRS resource after the starting symbol of the SL PRS resource can be defined (e.g., 6). For example, the relative starting RE frequency offset within the SL PRS symbol can be defined (e.g., 2). For example, the comb size of the SL PRS resource can be defined (e.g., 4). For example, the order of the effective starting RE offsets within the SL PRS symbol (e.g., in the order of 2, 0, 3, 1, 2, 0) can be determined based on mod(starting RE frequency (e.g., in the order of 2, 4, 3, 5, 2, 4)), the comb size (e.g., 4).

[0406] For example, a resource (e.g., a second resource) for sending / receiving a second SL PRS may be configured (selected) based on a configuration associated with a first SL PRS resource. For example, the second resource may be in a time slot (e.g., a logical time slot, a physical time slot) after the first SL PRS resource or in a time slot before the third SL PRS resource. For example, the second resource may be configured based on a relative starting RE frequency offset + a threshold (e.g., 1) (e.g., 2+1=3), wherein the relative starting RE frequency offset is within a symbol of the first SL PRS resource / third SL PRS resource. For example, the second resource may be configured based on a comb size (e.g., 4) of the first SL PRS resource / third SL PRS resource. For example, the effective starting RE offset within a symbol of the second SL PRS resource may be determined based on mod (starting RE frequency + 1 (e.g., in the order of 3, 5, 4, 6, 3, 5), comb size (e.g., 4)) (e.g., in the order of 3, 1, 0, 2, 3, 1).

[0407] For example, the second resource for RTT / bilateral RTT positioning can be clearly defined. For example, by clearly defining the relationship between the second resource for sending the corresponding SL PRS and the first resource / third resource, the first resource and the second resource may not conflict. For example, by clearly defining the relationship between the second resource for sending each SL PRS and the first resource / third resource, the SL PRS resources can be efficiently utilized.

[0408] Fig.18 is a diagram for explaining a process for performing wireless communication related to SL PRS based on an embodiment of the present disclosure. Fig.18 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0409] Reference Fig.18 According to an embodiment of the present disclosure, for example, a target UE and / or a server UE may obtain information related to a (SL)PRS configuration.

[0410] For example, the target UE / server UE may select / configure SL PRS resources (eg, first resources, second resources, third resources) based on the mode 1 resource allocation mode / mode 2 resource allocation mode. For example, the second resource may be determined based on information related to the first resource.

[0411] For example, the target UE may send a first SL PRS to the server UE on a first resource.For example, the server UE may receive a first SL PRS from the target UE.

[0412] For example, the server UE may send a second SL PRS to the target UE on the second resource.For example, the target UE may receive the second SL PRS from the server UE.

[0413] For example, the target UE may send a third SL PRS to the server UE on a third resource. For example, the server UE may receive a third SL PRS from the target UE.

[0414] For example, the target UE may perform SL positioning (eg, RTT positioning, dual RTT positioning) based on the first SL PRS / the second SL PRS / the third SL PRS.

[0415] For example, whether to apply the rules and / or the parameter values ​​associated with the proposed method / rules can be specifically (or differently or independently) configured / allowed for the SL transmission type (e.g., unicast, multicast, broadcast). For example, whether to apply the rules and / or the parameter values ​​associated with the proposed method / rules can be specifically (or differently or independently) configured / allowed for the SL groupcast HARQ feedback options (e.g., NACK-only feedback, ACK / NACK feedback, NACK-only feedback based on TX-RX distance). For example, whether to apply the rules and / or the parameter values ​​associated with the proposed method / rules can be specifically (or differently or independently) configured / allowed for the SL mode 1CG type (e.g., SL CG type 1 or SL CG type 2). For example, whether to apply the rules and / or the parameter values ​​associated with the proposed method / rules can be specifically (or differently or independently) configured / allowed for the SL mode type (e.g., mode 1 or mode 2). For example, whether to apply the rules and / or the parameter values ​​associated with the proposed method / rules can be specifically (or differently or independently) configured / allowed for the resource pool. For example, whether to apply the rules and / or the parameter values ​​associated with the proposed method / rules can be specifically (or differently or independently) configured / allowed for whether the PSFCH resources are configured in the resource pool. For example, whether to apply the rules and / or the parameter values ​​associated with the proposed method / rules can be specifically (or differently or independently) configured / allowed for the source (L2) ID. For example, whether to apply the rules and / or the parameter values ​​associated with 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 ​​associated with 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 ​​associated with 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 CONNECTED 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 (of the TX UE or the 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 rule and / or the parameter value associated with the proposed method / rule may be specifically (or differently or independently) configured / allowed for a case where PSFCH TX and PSFCH RX (and / or multiple PSFCH TX (exceeding UE capabilities)) overlap (from the perspective of a specific UE) (and / or a case where PSFCH TX (and / or PSFCH RX) is skipped). For example, whether to apply the rule and / or the parameter value associated with the proposed method / rule may be specifically (or differently or independently) configured / allowed for a case where the RX UE actually (successfully) receives a PSCCH (and / or PSSCH) (re)transmission from the TX UE.

[0416] For example, in the present disclosure, the term "configured / configured (or specified / specified)" may be extended to / interpreted as the base station notifying the UE via a predefined (physical layer or higher layer) channel / signal (e.g., SIB, RRC, MAC CE) (and / or being set by pre-configuration and / or the UE notifying other UEs via a predefined (physical layer or higher layer) channel / signal (e.g., SL MAC CE, PC5 RRC)).

[0417] 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 type of approach).

[0418] For example, in the present disclosure, a specific threshold value may refer to a threshold value predefined or (pre) configured by a higher layer (including an 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 an application layer) of the network, a base station or a UE. For example, an operation configured by the network / base station may refer to a base station (pre) configuring to a UE via higher layer RRC signaling or a base station configuring / signaling to a UE via a MAC CE or a base station signaling to a UE via a DCI.

[0419] Fig.19 A method for performing wireless communication by a first device according to an embodiment of the present disclosure is shown. Fig.19 The method can be combined with various embodiments of the present disclosure.

[0420] Reference Fig.19According to an embodiment of the present disclosure, in step S1910, for example, according to an embodiment, a method for performing wireless communication by a first device is provided. For example, the first device may obtain information related to a positioning reference signal (PRS) configuration. For example, the information related to the PRS configuration may include at least one of information related to an ID of a PRS resource, information related to an ID of a PRS sequence, information related to a starting time slot of a PRS resource, or information related to a starting symbol of a PRS resource. In step S1920, for example, the first device may receive a first side link (SL) PRS based on a first resource. In step S1930, for example, the first device may send a second SL PRS based on a second resource. For example, the second resource may be determined based on information related to the first resource.

[0421] Additionally or alternatively, the first device may obtain information related to the location of the first device based on the first SL PRS and the second SL PRS.

[0422] Additionally or alternatively, the first device may receive a third PRS based on a third resource.

[0423] Additionally or alternatively, the first device may obtain information related to the location of the first device based on the first SL PRS, the second SL PRS, and the third SL PRS.

[0424] Additionally or alternatively, the second resource may be determined based on information related to the first resource and information related to the third resource.

[0425] Additionally or alternatively, the first device may receive first control information related to the first PRS via a control channel related to the first PRS.

[0426] Additionally or alternatively, the first control information associated with the first PRS may include information associated with reserved resources associated with the third PRS.

[0427] Additionally or alternatively, the first device may select resources for the second SL PRS within a resource selection window for the second SL PRS.

[0428] Additionally or alternatively, the start time of the resource selection window may be a time after a first threshold from the first resource.

[0429] Additionally or alternatively, the end time of the resource selection window may be a time before the second threshold from the first resource.

[0430] Additionally or alternatively, at least one of the first threshold or the second threshold may be determined based on a distance between the first device and the second device.

[0431] Additionally or alternatively, the second resource may include a resource that is a threshold later than the first resource.

[0432] Additionally or alternatively, the information related to the first resource may include resources that are a threshold later than the first resource.

[0433] Additionally or alternatively, the information related to the first resource may include information related to an intra-frequency domain resource element offset for the first resource.

[0434] Additionally or alternatively, the information related to the first resource may include information related to a comb size of the first resource.

[0435] Additionally or alternatively, the information related to the first resource may include information related to the number of symbols within one slot for the first resource.

[0436] Additionally or alternatively, the first SL PRS may be received from the second device based on the first resource.

[0437] Additionally or alternatively, the information related to the first resource may include at least one of a source ID for the second device or a destination ID for the first device.

[0438] The proposed method may be applicable to devices according to various embodiments of the present disclosure. First, the memory (104) of the first device (100) may have instructions that are executed by the processor (102) so that the first device (100) (e.g., the processor (102), the transceiver (106)) performs operations. For example, the operation may include obtaining information related to the positioning reference signal (PRS) configuration by the first device (100) (e.g., the processor (102), the transceiver (106)), wherein the information related to the PRS configuration may include at least one of information related to the ID of the PRS resource, information related to the ID of the PRS sequence, information related to the starting time slot of the PRS resource, or information related to the starting symbol of the PRS resource; receiving a first side link (SL) PRS based on the first resource; and sending a second SL PRS based on the second resource, wherein the second resource can be determined based on the information related to the first resource.

[0439] According to an embodiment, a first device for performing wireless communication may be provided. The first device may include: at least one transceiver; at least one processor; and at least one memory, the at least one memory being connected to the at least one processor and storing instructions, the instructions being executed by the at least one processor so that the first device performs operations. For example, the operations include: obtaining information related to a positioning reference signal (PRS) configuration, wherein the information related to the PRS configuration may include at least one of information related to an ID of a PRS resource, information related to an ID of a PRS sequence, information related to a starting time slot of a PRS resource, or information related to a starting symbol of a PRS resource; receiving a first side link (SL) PRS based on a first resource; and sending a second SL PRS based on a second resource, wherein the second resource may be determined based on the information related to the first resource.

[0440] According to an embodiment, a device configured to control a first device may be provided. The device may include: at least one processor; and at least one memory, the at least one memory being connected to the at least one processor and storing instructions, the instructions being executed by the at least one processor so that the first device performs operations. For example, the operations include: obtaining information related to a positioning reference signal (PRS) configuration, wherein the information related to the PRS configuration may include at least one of information related to an ID of a PRS resource, information related to an ID of a PRS sequence, information related to a starting time slot of a PRS resource, or information related to a starting symbol of a PRS resource; receiving a first side link (SL) PRS based on a first resource; and sending a second SL PRS based on a second resource, wherein the second resource may be determined based on the information related to the first resource.

[0441] According to an embodiment, a non-transitory computer-readable storage medium storing instructions may be provided. These instructions are based on being executed by at least one processor to cause the first device to perform operations. For example, the operations include: obtaining information related to a positioning reference signal (PRS) configuration, wherein the information related to the PRS configuration may include at least one of information related to an ID of a PRS resource, information related to an ID of a PRS sequence, information related to a starting time slot of a PRS resource, or information related to a starting symbol of a PRS resource; receiving a first side link (SL) PRS based on a first resource; and sending a second SL PRS based on a second resource, wherein the second resource may be determined based on the information related to the first resource.

[0442] Fig. 20 A method for performing wireless communication by a second device based on an embodiment of the present disclosure is shown. Fig. 20 The method can be combined with various embodiments of the present disclosure.

[0443] Reference Fig. 20 According to an embodiment of the present disclosure, in step S2010, for example, according to an embodiment, a method for performing wireless communication by a second device is provided. For example, the second device may obtain information related to a positioning reference signal (PRS) configuration. For example, the information related to the PRS configuration may include at least one of information related to an ID of a PRS resource, information related to an ID of a PRS sequence, information related to a starting time slot of a PRS resource, or information related to a starting symbol of a PRS resource. In step S2020, for example, the second device may send a first side link (SL) PRS based on a first resource. In step S2030, for example, the second device may receive a second SL PRS based on a second resource. For example, the second resource may be determined based on information related to the first resource.

[0444] Additionally or alternatively, information related to the location of the first device may be obtained based on the first SL PRS and the second SL PRS.

[0445] Additionally or alternatively, the second device may send a third PRS based on a third resource.

[0446] Additionally or alternatively, the first device may obtain information related to the location of the first device based on the first SL PRS, the second SL PRS, and the third SL PRS.

[0447] Additionally or alternatively, the second resource may be determined based on information related to the first resource and information related to the third resource.

[0448] Additionally or alternatively, the second device may transmit first control information related to the first PRS via a control channel related to the first PRS.

[0449] Additionally or alternatively, the first control information associated with the first PRS may include information associated with reserved resources associated with the third PRS.

[0450] Additionally or alternatively, resources for the second SL PRS may be selected within a resource selection window for the second SL PRS.

[0451] Additionally or alternatively, the start time of the resource selection window may be a time after a first threshold from the first resource.

[0452] Additionally or alternatively, the end time of the resource selection window may be a time before the second threshold from the first resource.

[0453] Additionally or alternatively, at least one of the first threshold or the second threshold may be determined based on a distance between the first device and the second device.

[0454] Additionally or alternatively, the second resource may include a resource that is a threshold later than the first resource.

[0455] Additionally or alternatively, the information related to the first resource may include resources that are a threshold later than the first resource.

[0456] Additionally or alternatively, the information related to the first resource may include information related to an intra-frequency domain resource element offset for the first resource.

[0457] Additionally or alternatively, the information related to the first resource may include information related to a comb size of the first resource.

[0458] Additionally or alternatively, the information related to the first resource may include information related to the number of symbols within one slot for the first resource.

[0459] Additionally or alternatively, a first SL PRS may be sent to the first device based on the first resource.

[0460] Additionally or alternatively, the information related to the first resource may include at least one of a source ID for the second device or a destination ID for the first device.

[0461] The proposed method may be applicable to devices according to various embodiments of the present disclosure. First, the memory (204) of the second device (200) may have instructions that are executed by the processor (202) so that the second device (200) (e.g., the processor (202), the transceiver (206)) performs operations. For example, the operation may include obtaining information related to the positioning reference signal (PRS) configuration by the second device (200) (e.g., the processor (202), the transceiver (206)), wherein the information related to the PRS configuration may include at least one of information related to the ID of the PRS resource, information related to the ID of the PRS sequence, information related to the starting time slot of the PRS resource, or information related to the starting symbol of the PRS resource; sending a first side link (SL) PRS based on the first resource; and receiving a second SL PRS based on the second resource, wherein the second resource can be determined based on the information related to the first resource.

[0462] According to an embodiment, a second device for performing wireless communication may be provided. The second device may include: at least one transceiver; at least one processor; and at least one memory, the at least one memory being connected to the at least one processor and storing instructions, the instructions being executed by the at least one processor so that the second device performs operations. For example, the operations include: obtaining information related to a positioning reference signal (PRS) configuration, wherein the information related to the PRS configuration may include at least one of information related to an ID of a PRS resource, information related to an ID of a PRS sequence, information related to a starting time slot of a PRS resource, or information related to a starting symbol of a PRS resource; sending a first side link (SL) PRS based on a first resource; and receiving a second SL PRS based on a second resource, wherein the second resource may be determined based on the information related to the first resource.

[0463] According to an embodiment, an apparatus configured to control a second device may be provided. The apparatus may include: at least one processor; and at least one memory, the at least one memory being connected to the at least one processor and storing instructions, which are executed by the at least one processor so that the second device performs operations. For example, the operations include: obtaining information related to a positioning reference signal (PRS) configuration, wherein the information related to the PRS configuration may include at least one of information related to an ID of a PRS resource, information related to an ID of a PRS sequence, information related to a starting time slot of a PRS resource, or information related to a starting symbol of a PRS resource; sending a first side link (SL) PRS based on a first resource; and receiving a second SL PRS based on a second resource, wherein the second resource may be determined based on the information related to the first resource.

[0464] According to an embodiment, a non-transitory computer-readable storage medium storing instructions may be provided. These instructions are based on being executed by at least one processor so that the second device performs operations. For example, the operations include: obtaining information related to a positioning reference signal (PRS) configuration, wherein the information related to the PRS configuration may include at least one of information related to an ID of a PRS resource, information related to an ID of a PRS sequence, information related to a starting time slot of a PRS resource, or information related to a starting symbol of a PRS resource; sending a first side link (SL) PRS based on a first resource; and receiving a second SL PRS based on a second resource, wherein the second resource may be determined based on the information related to the first resource.

[0465] Various embodiments of the present disclosure may be combined with each other.

[0466] Hereinafter, devices to which various embodiments of the present disclosure can be applied will be described.

[0467] The various descriptions, functions, processes, proposals, methods and / or operational flows of the present disclosure described herein may be applied to, but not limited to, various fields requiring wireless communication / connection between devices (e.g., 5G).

[0468] Hereinafter, a description will be given in more detail 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.

[0469] Fig.21 A communication system 1 according to an embodiment of the present disclosure is shown. Fig.21 The embodiments of the present invention can be combined with various embodiments of the present disclosure.

[0470] Reference Fig.21 , a communication system 1 to which various embodiments of the present disclosure are applied includes a wireless device, a base station (BS), and a network. Herein, a wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G new RAT (NR) or long term evolution (LTE)), and may be referred to as a communication / radio / 5G device. The wireless device may include, but is not limited to, a robot 100a, a vehicle (100b-1, 100b-2), an extended reality (XR) device 100c, a handheld device 100d, a home appliance 100e, an Internet of Things (IoT) device 100f, and an artificial intelligence (AI) device / server 400. For example, a vehicle may include a vehicle with a wireless communication function, an autonomous vehicle, and a vehicle capable of performing inter-vehicle communication. Herein, a vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices and may be implemented in the form of head mounted devices (HMDs), head up displays (HUDs) installed in vehicles, televisions, smart phones, computers, wearable devices, home appliances, digital signage, vehicles, robots, etc. Handheld devices may include smart phones, smart boards, wearable devices (e.g., smart watches or smart glasses), and computers (e.g., notebooks). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors and smart meters. For example, a BS and a network may be implemented as wireless devices, and a specific wireless device 200a may operate as a BS / network node relative to other wireless devices.

[0471] Here, in addition to LTE, NR and 6G, the wireless communication technology implemented in the wireless devices 100a to 100f of the present disclosure may also include a 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 technology 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 an LPWAN, and may be referred to as various names including enhanced machine type communication (eMTC) and the like. 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 technology implemented in the wireless devices 100a to 100f of the present disclosure may include at least one of Bluetooth, a low power wide area network (LPWAN), and ZigBee considering low power communication, and is not limited to the above names. As an example, 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 as various names.

[0472] The wireless devices 100a to 100f may be connected to the network 300 via the BS 200. 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 BS 200 / network 300, the wireless devices 100a to 100f may perform direct communication (e.g., side link 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). An IoT device (e.g., a sensor) may perform direct communication with other IoT devices (e.g., a sensor) or other wireless devices 100a to 100f.

[0473] 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 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, various configuration information configuration processes for sending / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation and resource mapping / demapping), and at least a portion of the resource allocation process can be performed based on various proposals of the present disclosure.

[0474] Fig. 22 A wireless device according to an embodiment of the present disclosure is shown. Fig. 22 The embodiments of the present invention can be combined with various embodiments of the present disclosure.

[0475] Reference Fig. 22 , the first wireless device 100 and the second wireless device 200 may transmit radio signals via various RATs (e.g., LTE and NR). Herein, {the first wireless device 100 and the second wireless device 200} may correspond to Fig.21 {wireless device 100x and BS200} and / or {wireless device 100x and wireless device 100x} in.

[0476] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and may also 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 a radio signal including the first information / signals through the (one or more) transceivers 106. The (one or more) processors 102 may receive a radio signal including second information / signals through the transceiver 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, (one or more) memory 104 may store software code including commands for executing part or all of the processing controlled by (one or more) processor 102 or for executing the description, function, process, proposal, method and / or operation flow disclosed in this document. Here, (one or more) processor 102 and (one or more) memory 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). (One or more) transceiver 106 may be connected to (one or more) processor 102 and send and / or receive radio signals through (one or more) antenna 108. Each transceiver 106 may include a transmitter and / or a receiver. (One or more) transceiver 106 may be used interchangeably with (one or more) radio frequency (RF) units. In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0477] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and may also 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 flows 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 a radio signal including the third information / signals through the (one or more) transceivers 206. The (one or more) processors 202 may receive a radio signal including a fourth information / signal 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. (One or more) memory 204 can be connected to (one or more) processors 202, and can store various information related to the operation of (one or more) processors 202. For example, (one or more) memory 204 can store software code including commands for executing part or all of the processing controlled by (one or more) processors 202 or for executing the description, function, process, proposal, method and / or operation flow disclosed in this document. Here, (one or more) processors 202 and (one or more) memory 204 can be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). (One or more) transceivers 206 can be connected to (one or more) processors 202, and send and / or receive radio signals through (one or more) antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. (One or more) transceivers 206 can be used interchangeably with (one or more) RF units. In the present disclosure, a wireless device can represent a communication modem / circuit / chip.

[0478] Below, the hardware elements of the wireless devices 100 and 200 will be described in more detail. One or more protocol layers may be implemented by, but are not limited to, one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). One or more processors 102 and 202 may generate one or more protocol data units (PDUs) and / or one or more service data units (SDUs) according to the descriptions, functions, processes, proposals, methods, and / or operating procedures disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operating procedures disclosed in this document. One or more processors 102 and 202 may generate a signal (e.g., a baseband signal) including a PDU, SDU, message, control information, data, or information according to the description, function, process, proposal, method, and / or operation flow disclosed in this document, and provide the generated signal to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive a signal (e.g., a baseband signal) from one or more transceivers 106 and 206, and obtain the PDU, SDU, message, control information, data, or information according to the description, function, process, proposal, method, and / or operation flow disclosed in this document.

[0479] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software or a combination thereof. For example, one or more application specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs) or one or more field programmable gate arrays (FPGAs) may be included in one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods and / or operational flows disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes or functions. Firmware or software configured to perform the descriptions, functions, processes, proposals, methods and / or operational flows disclosed in this document may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204, thereby being driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods and / or operational flows disclosed in this document may be implemented using software or firmware in the form of codes, commands and / or command sets.

[0480] 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, codes, instructions, and / or commands. One or more memories 104 and 204 may be composed of read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard drive, register, cash memory, computer-readable storage medium, and / or a combination 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 via various technologies such as wired or wireless connections.

[0481] One or more transceivers 106 and 206 may send user data, control information and / or radio signals / channels mentioned in the method and / or operation flow 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 description, function, process, proposal, method and / or operation flow 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 so 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 so 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 description, 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 received radio signals / channels, etc. from RF band signals to baseband signals to process received user data, control information, radio signals / channels, etc. using one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc. processed using one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more of the transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0482] Fig.23 A signal processing circuit for transmitting a signal according to an embodiment of the present disclosure is shown. Fig.23 The embodiments of the present invention can be combined with various embodiments of the present disclosure.

[0483] Reference Fig.23 The signal processing circuit 1000 may include a scrambler 1010, a modulator 1020, a layer mapper 1030, a precoder 1040, a resource mapper 1050, and a signal generator 1060. Fig.23 Operation / function, not limited to Fig. 22The processor (102, 202) and / or transceiver (106, 206) of Fig. 22 The processor (102, 202) and / or the transceiver (106, 206) are implemented Fig.23 For example, you can Fig. 22 The processor (102, 202) implements blocks 1010 to 1060. Alternatively, Fig. 22 The processor (102, 202) implements blocks 1010 to 1050 and can be implemented by Fig. 22 The transceiver (106, 206) is used to implement box 1060.

[0484] Can be through Fig.23 The signal processing circuit 1000 converts the codeword into a radio signal. Herein, the codeword is a coded bit sequence of an information block. The information block may include a transport block (e.g., UL-SCH transport block, DL-SCH transport block). The radio signal may be transmitted through various physical channels (e.g., PUSCH and PDSCH).

[0485] Specifically, the codeword can be converted into a scrambled bit sequence by the scrambler 1010. The scrambling sequence for scrambling can be generated based on an initial value, and the initial value can include the ID information of the wireless device. The scrambled bit sequence can be modulated into a modulation symbol sequence by the modulator 1020. The modulation scheme may include pi / 2-binary phase shift keying (pi / 2-BPSK), m-phase shift keying (m-PSK) and m-quadrature amplitude modulation (m-QAM). The complex modulation symbol sequence can be mapped to one or more transmission layers by the layer mapper 1030. The modulation symbol of each transmission layer can be mapped (precoded) to (one or more) corresponding antenna ports by the precoder 1040. The output z of the precoder 1040 can be obtained by multiplying the output y of the layer mapper 1030 with the N*M precoding matrix W. Here, N is the number of antenna ports and M is the number of transmission layers. The precoder 1040 can perform precoding after performing transform precoding (e.g., DFT) for the complex modulation symbol. Alternatively, the precoder 1040 may perform precoding without performing transform precoding.

[0486] The resource mapper 1050 can map the modulation symbols of each antenna port to time-frequency resources. The time-frequency resources may include multiple symbols in the time domain (e.g., CP-OFDMA symbols and DFT-s-OFDMA symbols) and multiple subcarriers in the frequency domain. The signal generator 1060 can generate a radio signal from the mapped modulation symbols, and the generated radio signal can be sent to other devices through each antenna. To this end, the signal generator 1060 may include an inverse fast Fourier transform (IFFT) module, a cyclic prefix (CP) inserter, a digital-to-analog converter (DAC), and an up-converter.

[0487] Can Fig.23 The signal processing process for the signal received in the wireless device is configured in a manner opposite to the signal processing process (1010-1060) of the wireless device. Fig. 22 100, 200) can receive a radio signal from the outside through an antenna port / transceiver. The received radio signal can be converted into a baseband signal by a signal restorer. To this end, the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a fast Fourier transform (FFT) module. Next, the baseband signal can be restored to a codeword through a resource demapping process, a post-coding process, a demodulation processor, and a descrambling process. The codeword can be restored to the original information block by decoding. Therefore, a signal processing circuit (not illustrated) for receiving a signal may include a signal restorer, a resource demapper, a post-encoder, a demodulator, a descrambler, and a decoder.

[0488] Fig.24 Another example of a wireless device based on an embodiment of the present disclosure is shown. The wireless device can be implemented in various forms according to use cases / services (see Fig.21 ). Fig.24 The embodiments of the present invention can be combined with various embodiments of the present disclosure.

[0489] Reference Fig.24 , the wireless device (100, 200) may correspond to Fig. 22 The wireless devices (100, 200) 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 an additional component 140. The communication unit may include a communication circuit 112 and (one or more) transceivers 114. For example, the communication circuit 112 may include Fig. 22 One or more processors (102, 202) and / or one or more memories (104, 204) of the present invention. For example, the transceiver(s) 114 may include Fig. 22The control unit 120 is electrically connected to the communication unit 110, the memory 130, and the additional components 140, and controls the overall operation of the wireless device. For example, the control unit 120 can control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the storage unit 130. The control unit 120 can 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.

[0490] The additional component 140 may be configured in various ways depending on the type of wireless device. For example, the additional component 140 may include at least one of a power unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device may be implemented in the following forms without limitation: a robot ( Fig.21 100a), vehicles ( Fig.21 100b-1 and 100b-2), XR devices ( Fig.21 100c), handheld devices ( Fig.21 100d), household appliances ( Fig.21 100e), IoT devices ( Fig.21 100f), digital broadcasting terminals, hologram equipment, public safety equipment, MTC equipment, medical equipment, fintech equipment (or financial equipment), security equipment, climate / environmental equipment, AI servers / equipment ( Fig.21 400), BS( Fig.21 200), network nodes, etc. Depending on the use case / service, the wireless device can be used in a mobile or fixed place.

[0491] exist Fig.24In the wireless device (100, 200), all the various elements, components, units / parts and / or modules in the wireless device (100, 200) can be connected to each other through a wired interface, or at least part of them can be connected wirelessly through the communication unit 110. For example, in each of the wireless devices (100, 200), the control unit 120 and the communication unit 110 can be connected by wire, and the control unit 120 and the first unit (e.g., 130, 140) can be connected wirelessly through the communication unit 110. Each element, component, unit / part and / or module within the wireless device (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.

[0492] Hereinafter, the implementation will be described in detail with reference to the accompanying drawings. Fig.24 .

[0493] Fig.25 A handheld device based on an embodiment of the present disclosure is shown. The handheld device may include a smart phone, a smart board, a wearable device (e.g., a smart watch or smart glasses), or a portable computer (e.g., a notebook). The handheld device may be referred to as a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), an advanced mobile station (AMS), or a wireless terminal (WT). Fig.25 The embodiments of the present invention can be combined with various embodiments of the present disclosure.

[0494] Reference Fig.25 , the handheld device 100 may 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 may be configured as a part of the communication unit 110. Blocks 110 to 130 / 140a to 140c correspond to Fig.24 Frame 110 to 130 / 140.

[0495] The communication unit 110 may send and receive signals (e.g., data signals and control signals) to and from other wireless devices or BSs. The control unit 120 may perform various operations by controlling the constituent elements 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 include 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 (e.g., audio I / O ports and video I / O ports) for connecting to external devices. 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 tactile module.

[0496] For example, in the case of data communication, the I / O unit 140c can obtain information / signals (e.g., touch, text, voice, image, or video) input by the user, and the obtained information / signals can be stored in the storage unit 130. The communication unit 110 can convert the information / signals stored in the memory into radio signals, and directly send the converted radio signals to other wireless devices or to the BS. The communication unit 110 can receive radio signals from other wireless devices or BSs, and then restore the received radio signals to the original information / signals. The restored information / signals can be stored in the storage unit 130, and can be output as various types (e.g., text, voice, image, video, or tactile) through the I / O unit 140.

[0497] Fig.26 A vehicle or autonomous vehicle based on an embodiment of the present disclosure is shown. The vehicle or autonomous vehicle can be implemented by a mobile robot, a car, a train, a manned / unmanned aerial vehicle (AV), a ship, etc. Fig.26 The embodiments of the present invention can be combined with various embodiments of the present disclosure.

[0498] Reference Fig.26 , the vehicle or autonomous vehicle 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a drive unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 may be configured as a part of the communication unit 110. Blocks 110 / 130 / 140a to 140d correspond to Fig.24 Frame 110 / 130 / 140.

[0499] The communication unit 110 may 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 may perform various operations by controlling elements of the vehicle or autonomous vehicle 100. The control unit 120 may include an electronic control unit (ECU). The drive unit 140a may cause the vehicle or autonomous vehicle 100 to travel on the road. The drive unit 140a may include an engine, a motor, a transmission system, wheels, brakes, a steering device, etc. The power supply unit 140b may supply power to the vehicle or autonomous vehicle 100 and may include a wired / wireless charging circuit, a battery, etc. The sensor unit 140c may acquire vehicle status, external environment information, user information, etc. The sensor unit 140c may 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 technology for maintaining the lane in which the vehicle is traveling, technology for automatically adjusting the speed (e.g., adaptive cruise control), technology for autonomously driving along a determined path, technology for driving by automatically setting a path when a destination is set, and the like.

[0500] 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 drive unit 140a so that the vehicle or the autonomous vehicle 100 can move along the autonomous driving path according to the driving plan (e.g., speed / direction control). In the middle of autonomous driving, the communication unit 110 can aperiodically / periodically obtain the latest traffic information data from the external server and obtain the surrounding traffic information data from the adjacent vehicle. In the middle of autonomous driving, the sensor unit 140c can obtain vehicle status and / or surrounding environment information. The autonomous driving unit 140d can update the autonomous driving path and driving plan based on the newly acquired data / information. The communication unit 110 can transmit information about the vehicle position, autonomous driving path and / or driving plan to the external server. The external server can predict traffic information data based on the information collected from the vehicle or autonomous vehicle using AI technology, etc., and provide the predicted traffic information data to the vehicle or autonomous vehicle.

[0501] The claims in this specification can be combined in various ways. For example, the technical features in the method claims of this specification can be combined to be implemented or performed in a device, and the technical features in the device claims can be combined to be implemented or performed in a method. In addition, the technical features in (one or more) method claims and (one or more) device claims can be combined to be implemented or performed in a device. In addition, the technical features in (one or more) method claims and (one or more) device claims can be combined to be implemented or performed in a method.

Claims

1. A method for performing wireless communication by a first device, the method comprising the following steps: Obtain information related to positioning reference signal PRS configuration, The information related to the PRS configuration includes at least one of information related to an ID of a PRS resource, information related to an ID of a PRS sequence, information related to a starting time slot of the PRS resource, or information related to a starting symbol of the PRS resource; receiving a first side link SL PRS based on the first resource; and Sending a second SL PRS based on the second resource, The second resource is determined based on information related to the first resource.

2. The method according to claim 1, further comprising the steps of: Based on the first SL PRS and the second SL PRS, information related to the location of the first device is obtained.

3. The method according to claim 1, further comprising the steps of: receiving a third PRS based on a third resource; and Information related to the location of the first device is obtained based on the first SL PRS, the second SL PRS, and the third PRS.

4. The method according to claim 3, in, The second resource is determined based on the information related to the first resource and the information related to the third resource.

5. The method according to claim 3, further comprising the steps of: receiving first control information related to the first PRS via a control channel related to the first PRS, The first control information related to the first PRS includes information related to reserved resources related to the third PRS.

6. The method according to claim 3, further comprising the steps of: selecting, within a resource selection window for the second SL PRS, resources for the second SL PRS, The starting time of the resource selection window is the time after the first threshold from the first resource, and The end time of the resource selection window is the time before the second threshold from the first resource.

7. The method according to claim 6, in, At least one of the first threshold or the second threshold is determined based on a distance between the first device and the second device.

8. The method according to claim 1, in, The second resources include resources that are a threshold later than the first resources.

9. The method according to claim 1, in, The information related to the first resource includes resources that are a threshold later than the first resource.

10. The method according to claim 1, in, The information related to the first resource includes information related to an intra-frequency domain resource element offset for the first resource.

11. The method according to claim 1, in, The information related to the first resource includes information related to a comb size of the first resource.

12. The method according to claim 1, in, The information related to the first resource includes information related to the number of symbols in one time slot for the first resource.

13. The method according to claim 1, in, receiving the first SL PRS from a second device based on the first resource, and The information related to the first resource includes at least one of a source ID for the second device or a destination ID for the first device.

14. A first device for performing wireless communication, the first device comprising: at least one transceiver; at least one processor; as well as At least one memory, the at least one memory is connected to the at least one processor and stores instructions, the instructions, upon being executed by the at least one processor, causing the first device to perform operations, the operations comprising: Obtain information related to positioning reference signal PRS configuration, The information related to the PRS configuration includes at least one of information related to an ID of a PRS resource, information related to an ID of a PRS sequence, information related to a starting time slot of the PRS resource, or information related to a starting symbol of the PRS resource; receiving a first side link SL PRS based on the first resource; and Sending a second SL PRS based on the second resource, The second resource is determined based on information related to the first resource.

15. An apparatus configured to control a first device, the apparatus comprising: at least one processor; as well as At least one memory, the at least one memory is connected to the at least one processor and stores instructions, the instructions, upon being executed by the at least one processor, causing the first device to perform operations, the operations comprising: Obtain information related to positioning reference signal PRS configuration, The information related to the PRS configuration includes at least one of information related to an ID of a PRS resource, information related to an ID of a PRS sequence, information related to a starting time slot of the PRS resource, or information related to a starting symbol of the PRS resource; receiving a first side link SL PRS based on the first resource; and Sending a second SL PRS based on the second resource, The second resource is determined based on information related to the first resource.

16. A non-transitory computer-readable storage medium storing instructions, wherein the instructions, upon being executed by at least one processor, cause a first device to perform operations, the operations comprising: Obtain information related to positioning reference signal PRS configuration, The information related to the PRS configuration includes at least one of information related to an ID of a PRS resource, information related to an ID of a PRS sequence, information related to a starting time slot of the PRS resource, or information related to a starting symbol of the PRS resource; receiving a first side link SL PRS based on the first resource; and Sending a second SL PRS based on the second resource, The second resource is determined based on information related to the first resource.

17. A method for performing wireless communication by a second device, the method comprising the steps of: Obtain information related to positioning reference signal PRS configuration, The information related to the PRS configuration includes at least one of information related to an ID of a PRS resource, information related to an ID of a PRS sequence, information related to a starting time slot of the PRS resource, or information related to a starting symbol of the PRS resource; Sending a first sidelink SL PRS based on the first resource; and receiving a second SL PRS based on the second resource, The second resource is determined based on information related to the first resource.

18. A second device for performing wireless communication, the second device comprising: at least one transceiver; at least one processor; as well as at least one memory connected to the at least one processor and storing instructions, the instructions causing the second device to perform operations based on being executed by the at least one processor, the operations comprising: Obtain information related to positioning reference signal PRS configuration, The information related to the PRS configuration includes at least one of information related to an ID of a PRS resource, information related to an ID of a PRS sequence, information related to a starting time slot of the PRS resource, or information related to a starting symbol of the PRS resource; Sending a first sidelink SL PRS based on the first resource; and receiving a second SL PRS based on the second resource, The second resource is determined based on information related to the first resource.

19. An apparatus configured to control a second device, the apparatus comprising: at least one processor; as well as at least one memory connected to the at least one processor and storing instructions, the instructions causing the second device to perform operations based on being executed by the at least one processor, the operations comprising: Obtain information related to positioning reference signal PRS configuration, The information related to the PRS configuration includes at least one of information related to an ID of a PRS resource, information related to an ID of a PRS sequence, information related to a starting time slot of the PRS resource, or information related to a starting symbol of the PRS resource; Sending a first sidelink SL PRS based on the first resource; and receiving a second SL PRS based on the second resource, The second resource is determined based on information related to the first resource.

20. A non-transitory computer-readable storage medium storing instructions, wherein the instructions, upon being executed by at least one processor, cause a second device to perform operations, the operations comprising: Obtain information related to positioning reference signal PRS configuration, The information related to the PRS configuration includes at least one of information related to an ID of a PRS resource, information related to an ID of a PRS sequence, information related to a starting time slot of the PRS resource, or information related to a starting symbol of the PRS resource; Sending a first sidelink SL PRS based on the first resource; and receiving a second SL PRS based on the second resource, The second resource is determined based on information related to the first resource.

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