Method and apparatus for performing wireless communication related to SL positioning

Abstract

A method in which a first device performs wireless communication and an apparatus supporting the same are presented. For example, a first device may obtain information related to a PRS configuration. For example, the information related to 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, and information about a start symbol of the PRS resource. For example, a first device may transmit a DCR message including information related to a service with respect to SL positioning. For example, a first device may receive a DCA message related to a DCR message.

Description

Technical Field

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

[0002] Sidelink (SL) is a communication method that configures a direct link between User Equipment (UE) and exchanges voice or data directly between UEs 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) is 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 Uu interface.

[0003] In addition, as more and more communication devices require greater communication capacity, the demand for enhanced mobile broadband communication compared to the previous radio access technology (RAT) is rising. Therefore, the reliability and delay-sensitive services or communication systems of user equipment (UE) are 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). Here, NR can also support vehicle-to-everything (V2X) communication. 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 send a direct communication request (DCR) message including information related to a service related to side link (SL) positioning. For example, the first device may receive a direct communication acceptance (DCA) message related to the DCR message.

[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 connected to the at least one processor and storing instructions, which cause the first device to perform operations based on being executed by the at least one processor. For example, the operation includes: obtaining information related to a positioning reference signal (PRS) configuration, wherein 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 a PRS resource, or information related to a starting symbol of a PRS resource; sending a direct communication request (DCR) message including information related to a service related to side link (SL) positioning; and receiving a direct communication acceptance (DCA) message related to the DCR message.

[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 connected to the at least one processor and storing instructions, which cause the first device to perform operations based on being executed by the at least one processor. For example, the operation includes: obtaining information related to a positioning reference signal (PRS) configuration, wherein 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 a PRS resource, or information related to a starting symbol of a PRS resource; sending a direct communication request (DCR) message including information related to a service related to side link (SL) positioning; and receiving a direct communication acceptance (DCA) message related to the DCR message.

[0008] According to an embodiment, a non-transitory computer-readable storage medium storing instructions may be provided. The instructions cause a 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 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 a PRS resource, or information related to a starting symbol of a PRS resource; sending a direct communication request (DCR) message including information related to a service related to side link (SL) positioning; and receiving a direct communication acceptance (DCA) message related to the DCR message.

[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 receive a direct communication request (DCR) message including information related to a service related to side link (SL) positioning. For example, the second device may send a direct communication acceptance (DCA) message related to the DCR message.

[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, which is connected to the at least one processor and stores instructions, which cause the second device to perform operations based on being executed by the at least one processor. For example, the operation includes: obtaining information related to a positioning reference signal (PRS) configuration, wherein 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 a PRS resource, or information related to a starting symbol of a PRS resource; receiving a direct communication request (DCR) message including information related to a service related to side link (SL) positioning; and sending a direct communication acceptance (DCA) message related to the DCR message.

[0011] 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 connected to the at least one processor and storing instructions, which cause the second device to perform operations based on being executed by the at least one processor. For example, the operation includes: obtaining information related to a positioning reference signal (PRS) configuration, wherein 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 a PRS resource, or information related to a starting symbol of a PRS resource; receiving a direct communication request (DCR) message including information related to a service related to side link (SL) positioning; and sending a direct communication acceptance (DCA) message related to the DCR message.

[0012] According to an embodiment, a non-transitory computer-readable storage medium storing instructions may be provided. The instructions cause a second 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 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 a PRS resource, or information related to a starting symbol of a PRS resource; receiving a direct communication request (DCR) message including information related to a service related to side link (SL) positioning; and sending a direct communication acceptance (DCA) message related to the DCR message. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0014] Figure 2 An 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 based on 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 broadcast types 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.11 An 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 according to 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 double-side RTT according to an embodiment of the present disclosure is shown.

[0029] Fig.17 2 is a diagram for explaining a method for performing wireless communication associated with SL positioning based on an embodiment of the present disclosure.

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

[0031] Fig.19 A method for a first device to perform wireless communication according to 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 that "PDCCH" is proposed as an example of "control information". In other words, the "control information" of the present disclosure is not limited to "PDCCH", and "PDDCH" may be proposed as an example of "control information". Specifically, when indicated as "control information (ie, PDCCH)", this may also mean that "PDCCH" is proposed 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 proposed in the present disclosure may 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 may be implemented using radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA-2000. TDMA may 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 may 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) that uses 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 the following Table 1. That is, Table 1 shows the requirements of the 6G system.

[0050] [Table 1]

[0051]

[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 disclosure may 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 to be 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 ubiquitous.

[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, small cell network is an essential feature of 5G and beyond 5G (5GB) communication system. Therefore, 6G communication system also adopts the characteristics of 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 connectivity is characterized by a high capacity backhaul network 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-based and virtualized: Software-based and virtualized are two important functions that are fundamental to 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 the way 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] - Terahertz (THz) communication: Data rates can be increased by increasing bandwidth. This can be achieved by using sub-TH communication 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 regarded as the main part of the THz band for cellular communication. When the sub-THz band is added to the millimeter wave band, the 6G cellular communication capacity increases. 300GHz to 3THz of the defined THz band is in the far infrared (IR) band. The band of 300GHz to 3THz is part of the optical band, but is located at the boundary of the optical band and immediately after the RF band. Therefore, the band of 300GHz to 3THz has similarities with RF. Figure 2 An 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] - Quantum communication

[0073] - No cellular communication

[0074] - Integration of wireless information and power transmission

[0075] - Integration of wireless communication and sensing

[0076] - Integrated access and backhaul network

[0077] - Big data analysis

[0078] - Reconfigurable smart surface

[0079] - Metaverse

[0080] - Blockchain

[0081] - Unmanned Aerial Vehicles (UAVs): Unmanned aerial vehicles (UAVs) or drones will be an important factor in 6G wireless communications. In most cases, high-speed data wireless connections are provided using UAV technology. 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 ease of deployment, robust line-of-sight links, and freedom of mobility control. During emergencies such as natural disasters, it is not economically feasible 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.

[0082] - Advanced Air Mobility (AAM): AAM is the parent concept of Urban Air Mobility (UAM), which is an aerial vehicle that can be used in urban centers and can refer to vehicles that move between urban centers and regional bases.

[0083] Autonomous driving (self-driving)-Vehicle to Everything (V2X) is a core element for building autonomous driving infrastructure, and is a technology for vehicles to communicate and share with various elements on 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 according to 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] refer to 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 illustrates a case where only gNB is included. The BSs 20 may be connected to each other via an Xn interface. The BSs 20 may be connected to each other via a fifth generation (5G) core network (5GC) and an NG interface. More specifically, the BSs 20 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) shows the radio protocol stack of the control plane for Uu communication. Figure 4 (c) shows the radio protocol stack of the user plane for SL communication, and Figure 4 (d) shows the radio protocol stack of the control plane for SL communication.

[0090] refer to 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 between different physical layers (ie, the PHY layer of the transmitter and the PHY layer of the receiver) through a physical channel. The physical channel may be modulated using an orthogonal frequency division multiplexing (OFDM) scheme and uses time and frequency as radio resources.

[0092] The MAC layer provides services to the Radio Link Control (RLC) layer, which is a higher layer of the MAC layer, via logical channels. 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 the network 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 of user data, header compression and encryption. The functions of the Packet Data Convergence Protocol (PDCP) in the control plane include transmission and encryption / integrity protection of control plane data.

[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 an RRC connection is established between the RRC layer of the UE and the RRC layer of the E-UTRAN, the UE is in the RRC connected (RRC_CONNECTED) state, otherwise the UE may be in the RRC idle (RRC_IDLE) state. In the case of NR, an RRC inactive (RRC_INACTIVE) state is additionally defined, and the UE in the RRC_INACTIVE state may maintain 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 the transport channel may include a broadcast control channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), a multicast control channel (MCCH), a multicast traffic channel (MTCH), etc.

[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] refer to Figure 5In NR, a radio frame can be used to perform uplink and downlink transmissions. The length of a radio frame is 10 ms and can be defined as consisting of two half frames (HF). A half frame can include five 1 ms subframes (SF). A subframe (SF) can be divided into one or more slots, and the number of slots within a subframe can be determined by a subcarrier spacing (SCS). Each 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.) may be configured differently between multiple cells integrated into one UE. Therefore, the (absolute time) duration (or interval) of a time resource (e.g., subframe, time slot, or 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 15 kHz, a wide range of traditional cellular bands can be supported, and with an SCS of 30 kHz / 60 kHz, dense cities, lower latency, and wider carrier bandwidths can be supported. With an SCS of 60 kHz or higher, bandwidths greater than 24.25 GHz 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]

[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. The unlicensed bands may be used for various purposes, for example, the unlicensed bands are used for vehicle-specific communications (e.g., autonomous driving).

[0113] [Table 4]

[0114]

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

[0118] Hereinafter, a bandwidth part (BWP) and a 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 an 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 may be defined for SL. The same SL BWP may be used in transmission and reception. For example, a transmitting UE may send a SL channel or SL signal on a specific BWP, and a receiving UE may receive a SL channel or SL signal on a specific BWP. In a licensed carrier, the SL BWP may be defined separately from the Uu BWP, and the SL BWP may have configuration signaling separate from the Uu BWP. For example, the UE may receive a configuration for the SL BWP from the BS / network. For example, the UE may 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 may 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. Assume that Figure 7 In the embodiment, the number of BWPs is 3.

[0123] refer to 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 the 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 may 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 may be the PRB distance between the lowest subcarrier within a given parameter set and point A. For example, the bandwidth may 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) may be a (broadcast) channel for transmitting default (system) information that the UE must first know before SL signal transmission / reception. For example, the default information may be information related to SLSS, duplex mode (DM), time division duplex (TDD) uplink / downlink (UL / DL) configuration, information related to 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 may 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 by a UE based on a transmission mode according to an embodiment of the present disclosure is shown. Figure 8 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure. 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 operation related to NR resource allocation mode 2.

[0132] refer to 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 used to report 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 (log2I) bits, where I is the number of resource pools used for transmission as 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 for the initial transmission -ceiling(log2(N SL subChannel ))Bit

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

[0144] -PSFCH-to-HARQ feedback timing indicator -ceiling (log2N fb_timing ) bits, where N fb_timing is the number of entries in the higher layer parameter sl-PSFCH-ToPUCCH.

[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] refer to Figure 8 (b) in LTE transmission mode 2, LTE transmission mode 4 or NR resource allocation mode 2, the UE may determine the SL transmission resources within the SL resources configured by the base station / network or the preconfigured SL resources. For example, the configured SL resources or the preconfigured SL resources may be a resource pool. For example, the UE may autonomously select or schedule resources for SL transmission. For example, the UE may perform SL communication by autonomously selecting resources within the configured resource pool. For example, the UE may autonomously select resources within the selection window by performing a sensing process and a resource (re)selection process. For example, sensing may be performed in units of subchannels. For example, in step S810, the first UE, which has selected resources from the resource pool by itself, may send a PSCCH (e.g., sidelink control information (SCI) or a first-level SCI) to a second UE by using the resources. In step S820, the first UE may send a PSSCH (e.g., a second-level SCI, a MAC PDU, data, etc.) related to the PSCCH to the second UE. In step S830, the first UE may receive a PSFCH related to the PSCCH / PSSCH from the second UE.

[0150] refer to 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, ceiling(log2(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 log2 (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 (log2N rsv_period ) bits, where Nrsv_period is the number of entries in the higher layer parameter sl-ResourceReservePeriodList; otherwise, 0

[0158] -DMRS pattern-ceiling(log2N 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]

[0168] [Table 6]

[0169]

[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 digits

[0176] - Destination ID - 16 digits

[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]

[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 digits

[0189] - Destination ID - 16 digits

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

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

[0195] Fig. 9 Three broadcast types according to embodiments of the present disclosure are shown. 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) shows unicast type SL communication, and Fig. 9 (c) in the figure 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 transmitting 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 transmitting 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 can send HARQ-NACK to the transmitting UE through 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 can send HARQ-ACK to the transmitting UE through 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, ;

[0208] - remaining packet delay budget;

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

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

[0211] - As part of the re-evaluation or preemption process, if higher layers request the UE to determine a subset of resources from which the higher layers will select resources for PSSCH / PSCCH transmission, the higher layers provide the set of resources that may be subject to re-evaluation and the set of resources that may be subject to preemption .

[0212] - The UE implementation determines the time slot A subset of resources requested previously or subsequently by a higher layer, where yes and The time slot with the smallest time slot index among equal ,in is defined in the time slots in Table X1, where It is the SCS configuration of SL BWP.

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

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

[0215] - sl-Thres-RSRP-List: This higher layer parameter is used for each combination Provides RSRP thresholds, where is the value of the priority field in the received SCI format 1-A, is the priority with which the UE selects resources for transmission; for a given invocation of this procedure, .

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

[0217] -sl-ResourceReservePeriodList

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

[0219] - sl-TxPercentageList: used for a given Internal parameters Defined as sl-TxPercentageList that converts from percentages to ratios ( )

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

[0221] Resource reservation interval (if provided) converts from milliseconds to logical slots, yielding .

[0222] mark:

[0223] Represents the set of time slots belonging to the sidelink resource pool.

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

[0225] [Table 8]

[0226]

[0227]

[0228]

[0229] 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.

[0230] [Table 9]

[0231]

[0232]

[0233] [Table 10]

[0234]

[0235]

[0236] Hereinafter, synchronization acquisition of SL UE will be described.

[0237] 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.

[0238] 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.

[0239] refer to 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 that is directly synchronized with the GNSS (in or out of network coverage). 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.

[0240] 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 the cell coverage of the frequency), or a primary cell or a serving cell (when it is outside the cell coverage of the frequency).

[0241] 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.

[0242] 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 through a control message provided by the BS.

[0243] 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.

[0244] [Table 11]

[0245]

[0246] [Table 12]

[0247]

[0248] 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.

[0249] 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.

[0250] Hereinafter, positioning will be described.

[0251] 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.

[0252] refer to 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 the location service is to be started in the AMF itself instead of the specific target UE. The AMF may then send a location service request to the Location Management Function (LMF). Upon receiving the location service request, the LMF may process the location service request and return a processing request including the estimated location of the UE, etc. to the AMF. In addition, if the location service request is received from a different entity such as the GMLC other than the AMF, the AMF may pass the processing request received from the LMF to the different entity.

[0253] 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 deliver the resulting 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.

[0254] 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 transmitted from the gNB and / or PRS dedicated TP in the E-UTRAN.

[0255] 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 location estimate of the target UE and the accuracy of the location estimate and speed. The SLP is the secure user plane location (SUPL) entity responsible for positioning through the user plane.

[0256] The UE may measure downlink signals through NG-RAN, E-UTRAN and / or other sources such as: different global navigation satellite systems (GNSS) and terrestrial beacon systems (TBS), wireless local access network (WLAN) access points, Bluetooth beacons, UE air pressure sensors, etc. The UE may include an LCS application. The UE may communicate with a network that the UE can access, or the LCS application may be accessed through another application included in the UE. The LCS application may include measurement and calculation functions required to determine the location of the UE. For example, the UE may include an independent positioning function such as a global positioning system (GPS), and may report the location 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.

[0257] 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. Fig.12 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0258] When the UE is in 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.15 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.

[0259] Will refer to Fig.12 The 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.

[0260] 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.

[0261] 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.15 The AMF can use the location service response to provide location services related to emergency calls, etc.

[0262] Fig.13 An example of a protocol layer for supporting LTE Positioning Protocol (LPP) message transmission between an LMF and a UE according to an embodiment of the present disclosure is shown. Fig.13 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0263] 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.

[0264] 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.

[0265] 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.

[0266] 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.

[0267] 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.

[0268] 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.

[0269] (1) OTDOA (Observed Time Difference of Arrival)

[0270] Fig.15 It is a diagram for explaining an OTDOA positioning method according to an embodiment of the present disclosure. Fig.13 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0271] 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.

[0272] 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.

[0273] 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.

[0274] For correct OTDOA measurements, 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.

[0275] For example, the RSTD of the two TPs may be calculated based on Equation 1.

[0276] [Equation 1]

[0277]

[0278] 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)" which is the transmission time offset between two TPs, and ni, n1 may represent values ​​related to the UE TOA measurement error.

[0279] (2) E-CID (Enhanced Cell ID)

[0280] 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.

[0281] 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.

[0282] For example, the serving gNB may implement the E-CID positioning method using E-UTRA measurements provided from the UE.

[0283] Examples of measurement elements that can be used for E-CID positioning may be as follows.

[0284] - UE measurements: E-UTRA Reference Signal Received Power (RSRP), E-UTRA Reference Signal Received Quality (RSRQ), UE E-UTRA Rx-Tx Time Difference, GSM EDGE Random Access Network (GERAN) / WLAN Reference Signal Strength Indicator (RSSI), UTRAN Common Pilot Channel (CPICH) Received Signal Code Power (RSCP), UTRAN CPICH Ec / Io

[0285] - E-UTRAN measurements: ng-eNB Rx-Tx time difference, timing advance (TADV), angle of arrival (AoA).

[0286] Herein, TADVs may be classified into Type 1 and Type 2 as follows.

[0287] TADV Type 1 = (ng-eNB Rx-Tx time difference) + (UE E-UTRA Rx-Tx time difference)

[0288] TADV type 2 = ng-eNB Rx-Tx time difference

[0289] 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.

[0290] (3) UTDOA (uplink time difference of arrival)

[0291] 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). 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.

[0292] (4) RTT (Round Trip Time)

[0293] 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.

[0294] 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.

[0295] D = cx{(t4-t1)–(t3-t2)} / 2 (where c is the speed of light)

[0296] 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.

[0297] (5) Bilateral RTT

[0298] Bilateral 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.

[0299] The method used to perform bilateral RTT between two entities is as follows,

[0300] Bilateral RTT is widely used in ultra-wideband (UWB) positioning and can reduce the impact of clock errors.

[0301] Fig.16 A bilateral 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] For example, the propagation delay T can be estimated from two measured values ​​(ie, Tround1, Tround2, Treply1, Treply2).

[0303] For example, the propagation delay T(T^) can be estimated based on Equation 2.

[0304] [Equation 2]

[0305]

[0306] For example, the propagation delay T(T^) can be estimated based on Equation 3.

[0307] [Equation 3]

[0308]

[0309] And, T can be obtained based on Equation 4 round1 *T round2 -T reply1 *T reply2 .

[0310] [Equation 4]

[0311]

[0312]

[0313] Here, Equation 4 may be the same as Equation 5.

[0314] [Equation 5]

[0315]

[0316]

[0317] Therefore, the propagation delay T(T^) can be estimated as Equation 6.

[0318] [Equation 6]

[0319]

[0320] In this case, the propagation delay estimation error due to the clock error can be obtained based on Equation 7.

[0321] [Equation 7]

[0322]

[0323] Here, e UE1 and e UE2 It can be the clock offset between UE1 and UE2.

[0324] The propagation delay T(T^) may be the estimated propagation delay between UE1 and UE2.

[0325] An example of reference signal time difference (RSTD) is shown in Table 13. The RSTD in Table 13 can be applied to SL positioning.

[0326] [Table 13]

[0327]

[0328] Table 14 shows an example of DL PRS reference signal received power (RSRP). The DL PRS RSRP of Table 14 may be applied to SL positioning.

[0329] [Table 14]

[0330]

[0331] Table 15 shows an example of DL relative signal time difference (RSTD). The DL RSTD of Table 15 can be applied to SL positioning.

[0332] [Table 15]

[0333]

[0334] 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.

[0335] [Table 16]

[0336]

[0337] 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.

[0338] [Table 17]

[0339]

[0340] 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.

[0341] [Table 18]

[0342]

[0343] Table 19 shows an example of UL angle of arrival (AoA). The UL AoA of Table 19 can be applied to SL positioning.

[0344] [Table 19]

[0345]

[0346] Table 20 shows an example of UL SRS reference signal received power (RSRP). The UL SRS RSRP of Table 17 may be applied to SL positioning.

[0347] [Table 20]

[0348]

[0349] 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 mean a positioning mode in which the position of any person is determined based on GNSS without using PRS (without correcting the positioning error by PRS). For example, the X in "X-based" and "X-assisted" can mean a node responsible for positioning calculations (and capable of providing measurements) and a node providing measurements (rather than positioning calculations). Therefore, for example, the operation of providing measurements used in the calculation of position estimates by the UE to the LMF can be described as "UE-assisted" (and can also be referred to as "LMF-based"), while the operation of the UE calculating its own position can be described as "UE-based".

[0350] For example, Tables 21-23 are tables showing examples of PRS assistance data.

[0351] [Table 21]

[0352]

[0353] [Table 22]

[0354]

[0355] [Table 23]

[0356]

[0357] Unless otherwise stated, the following definitions may apply to the following terms used in this disclosure.

[0358] - Channel: A carrier or a part of a carrier consisting of a set of consecutive RBs, where a channel access procedure is performed in a shared spectrum.

[0359] - Channel Access Procedure (CAP): A procedure to evaluate channel availability based on sensing before signal transmission in order to determine whether other communication nodes are using the channel. The basic sensing unit is a unit with a duration of T sl = 9 us sensing time slot. The base station or UE senses the channel during the sensing time slot duration. If the power detected within at least 4us of the sensing time slot duration is less than the energy detection threshold X thresh , then the sensing time slot duration T sl is considered idle. Otherwise, the sensing time slot duration T sl = 9 us is considered busy. CAP can also be called Listen Before Talk (LBT).

[0360] - Channel occupancy: Transmission of the base station / UE on the channel after the channel access procedure.

[0361] - Channel Occupancy Time (COT): The total time that a base station / UE and any base station / UE sharing the channel occupancy can perform transmission on the channel after the base station / UE performs the channel access procedure. In the case of determining COT, if a transmission gap is less than or equal to 25 us, the gap duration can be counted into the COT. The COT can be shared by the base station and the corresponding UE for transmission.

[0362] - DL transmission burst: A collection of transmissions from a base station without any gaps greater than 16us. Transmissions from a base station separated by gaps greater than 16us are considered separate DL transmission bursts. Without sensing channel availability within a DL transmission burst, the base station may perform a transmission after a gap.

[0363] - UL or SL transmission burst: A collection of transmissions from a UE without any gaps greater than 16us. Transmissions from a UE separated by gaps greater than 16us are considered separate UL or SL transmission bursts. The UE may perform a transmission after a gap without sensing channel availability within a UL or SL transmission burst.

[0364] - Discovery Burst: A DL transmission burst that includes a set of signals and / or channels that are confined within a window and associated with a duty cycle. In an LTE-based system, a discovery burst may be a base station-initiated transmission that includes PSS, SSS, and cell-specific RS (CRS), and further includes a non-zero power CSI-RS. In an NR-based system, a discovery burst may be a transmission initiated by a base station that includes at least a SS / PBCH block, and further includes a CORESET of a PDCCH for scheduling a PDSCH carrying SIB1, a PDSCH carrying SIB1, and / or a non-zero power CSI-RS.

[0365] Hereinafter, a method of transmitting a downlink signal through an unlicensed band will be described. For example, the method of transmitting a downlink signal through an unlicensed band may be applied to a method of transmitting a sidelink signal through an unlicensed band.

[0366] The base station may perform one of the following channel access procedures (eg, CAP) for downlink signal transmission in the unlicensed band.

[0367] (1) Type 1 Downlink (DL) CAP method

[0368] In a Type 1 DL CAP, the length of the duration spanned by a sensing slot sensed as idle prior to a transmission may be random. Type 1 DL CAP may be applied to the following transmissions:

[0369] - a transmission initiated by a base station, comprising (i) a unicast PDSCH with user plane data or (ii) a unicast PDSCH with user plane data and a unicast PDCCH scheduling user plane data, or

[0370] - A transmission initiated by a base station, comprising (i) only a discovery burst or (ii) a discovery burst multiplexed with non-unicast information.

[0371] According to the CAP operation in which a base station transmits a downlink signal through an unlicensed band, based on an embodiment of the present disclosure, the base station may sense whether a channel is idle to sense the delay duration T d Then, if the counter N is zero, the base station may perform transmission (S134). In this case, the base station may adjust the counter N by sensing a channel for an additional sensing slot duration according to the following steps:

[0372] Step 1) (S120) The base station sets N to N init (N = N init ), where N init is evenly distributed between 0 and CW p Then, step 4 continues.

[0373] Step 2) (S140) If N>0 and the base station determines to decrease the counter, the base station sets N to N-1 (N=N-1).

[0374] Step 3) (S150) The base station senses the channel for the additional sensing time slot duration. If the additional sensing time slot duration is idle (Y), then step 4 is continued. Otherwise (N), step 5 is continued.

[0375] Step 4) (S130) If N=0 (Y), the base station terminates CAP (S132). Otherwise (N), step 2 continues.

[0376] Step 5) (S160) The base station senses the channel until the additional delay duration T d The busy sensing time slot or the additional delay duration T d All time slots are detected as idle.

[0377] Step 6) (S170) If the additional delay duration T d If the channel is sensed to be idle during all time slots (Y), then step 4 is continued. Otherwise (N), step 5 is continued.

[0378] Table 24 shows the m applied to CAP p , minimum contention window (CW), maximum CW, maximum channel occupancy time (MCOT), and allowed CW size vary depending on the channel access priority class.

[0379] [Table 24]

[0380]

[0381] Referring to Table 24, the contention window size (CWS), maximum COT value, etc. for each CAPC may be defined. For example, T d Can be equal to T f + m p * T sl (T d = T f + m p * T sl ).

[0382] Delay duration T d Configured in the following order: Duration T f (16us) + m p The duration of the continuous sensing time slot is T sl (9 us). T f The sensing time slot duration T includes the beginning of the 16us duration sl .

[0383] Satisfies the following relationship: CW min,p <= CW p <= CW max,p .CW p Available via CW p = CW min,p is configured and updated (CW size update) based on the HARQ-ACK feedback (e.g., the ratio of ACK or NACK) for the previous DL burst (e.g., PDSCH) before step 1.p Can be initialized to CW based on HARQ-ACK feedback for previous DL burst min,p . Alternatively, CW p Can be increased to the next higher allowed value or left as is.

[0384] (2) Type 2 Downlink (DL) CAP method

[0385] In a Type 2 DL CAP, the length of the duration spanned by a sensing slot sensed to be idle before transmission may be determined. The Type 2 DL CAP is classified into Type 2A / 2B / 2C DL CAPs.

[0386] Type 2A DL CAP may be applied to the following transmissions.

[0387] - A transmission initiated by a base station consists of (i) a discovery burst only, or

[0388] - (ii) a discovery burst multiplexed with non-unicast information, or

[0389] - A transmission by the base station within the shared channel occupation interval 25us after the transmission by the UE.

[0390] In a Type 2A DL CAP, the base station may at least short_dl = Transmission is performed immediately after sensing that the channel is idle within 25us. Here, T short_dl Including duration T f (=16us) and then the duration T f The duration of a sensing time slot is T f The sensing time slot is included at its beginning. If T short_dl If all sensing time slots of T are sensed as idle, the channel is considered to be in short_dl Idle inside.

[0391] Type 2B DL ​​CAP is applicable to transmissions performed by the base station after an interval of 16us from the transmission of the UE during the shared channel occupancy time. In Type 2B DL ​​CAP, the base station can f = Transmission is performed immediately after sensing that the channel is idle within 16us. f The sensing timeslots within 9us after the end of the duration are included. For example, if the channel is sensed to be idle for a total of at least 5us with at least 4us of sensing occurring in the sensing timeslots, the channel may be considered idle for the duration T_f.

[0392] Type 2C DL CAP applies to transmissions performed by the base station within the shared channel occupation time after a maximum of 16 us from the UE's transmission. In Type 2C DL CAP, the base station does not perform channel sensing before performing transmission. The duration of the corresponding DL transmission can be up to 584 μs.

[0393] According to an embodiment of the present disclosure, for example, if an SLPRS for SL positioning is transmitted in a resource pool for SL communication, the accuracy of SL positioning may be limited by the bandwidth of the resource pool.

[0394] According to an embodiment of the present disclosure, a method for selecting a SL measurement gap to improve SL positioning accuracy, a method and operation for selecting a SL PRS transmission resource if a SL PRS is sent through the SL measurement gap, and a device supporting the method may be proposed.

[0395] According to an embodiment of the present disclosure, for example, if SL positioning is performed in a resource pool that performs SL communication, there may be a problem that the SL positioning accuracy is limited by the bandwidth of the resource pool. For example, in order to solve this problem, a SL measurement gap (hereinafter referred to as MG) may be configured (in advance) to provide a bandwidth that allows the SL positioning accuracy to be met. For example, the SL MG can be configured in at least one of the following ways.

[0396] For example, the SL MG may be configured per SL resource pool, and may include configuration information such as at least one of the following.

[0397] - For example, the MG cycle and MG interval length defined in units of SL logical time slots.

[0398] - For example, the bandwidth and center frequency or starting frequency position of the channel that the UE will use in the MG.

[0399] For example, one or more MGs may be configured per SL resource pool, and each MG may independently include configuration information.

[0400] For example, the UE may select one or more SL MGs suitable for sending the SL PRS from among one or more SL MGs based on the SL PRS configuration information to be sent, and report indexes or identification information for the selected one or more SL MGs to the base station or LMF.

[0401] For example, the base station or LMF may activate or deactivate a specific SL MG among one or more SL MGs configured in the resource pool via RRC or MAC CE or DCI. For example, the SL MG to be activated or deactivated by the base station or LMF (as described above) may be one of the one or more SL MGs reported by the UE and selected by the UE.

[0402] For example, the conditions under which the UE selects one or more SL MGs, or the conditions under which the base station / LMF selects the SL MG that it instructs the UE to activate or deactivate, may be at least one of the following.

[0403] - For example, a SL MG with a bandwidth (BW) above a certain threshold that satisfies the SL positioning accuracy requirement required for the SL positioning service may be selected.

[0404] - For example, a SL MG may be selected that includes candidate transmission resources within a time domain that is no later than the SL geolocation delay requirement required for the SL location service.

[0405] - According to an embodiment of the present disclosure, for example, a SL MG may be selected based on the congestion level (e.g., CBR, CR) of the MG to send a SL PRS. For example, among the candidate SL MGs for sending the SL PRS, a SL MG with a minimum CBR may be selected. For example, a SL MG with a CBR lower than a specific threshold may be randomly selected among the candidate SL MGs for SL PRS transmission. For example, a specific threshold may be determined based on a priority associated with the SL PRS or an associated SL positioning service. For example, a CBR threshold for a SL PRS having a lower priority value associated with the SL PRS or an associated SL positioning service may be higher than a CBR threshold for a SL PRS having a higher priority value.

[0406] For example, CBR measurement associated with selecting a SL MG for SL PRS transmission may be performed in at least one of the following.

[0407] - For example, the CBR may be measured based on the UE's sensing of the SL MG resources through which the CCH associated with the SL PRS is sent.

[0408] - For example, the CBR may be measured based on the UE's sensing of the SL MG resources through which the SL PRS is sent.

[0409] - For example, the final CBR value can be determined based on both the CBR based on the UE's sensing measurement of the SL MG resources through which the CCH associated with the SL PRS is sent and the CBR based on the UE's sensing measurement of the SL MG resources through which the SL PRS is sent. For example, in order to increase the success rate of SL PRS reception, the final CBR value can be determined to be greater than or equal to the values ​​of the two types of CBR measurements. For example, in order to increase the success rate of SL PRS transmission, the final CBR value can be determined to be less than or equal to the CBR values ​​in the two types of CBR measurements. For example, by considering both the SL PRS sending and receiving success rates, the average of the two types of CBR measurements can be determined as the final CBR value.

[0410] For example, it can be configured to the UE by the base station or LMF, or can be determined based on SL PRS configuration information pre-configured to the UE.

[0411] According to an embodiment of the present disclosure, for example, a SL MG including a SL PRS transmission resource according to SL PRS configuration information may be selected.

[0412] For example, a SL MG including a SL logical slot satisfying the SL PRS bandwidth and / or comb size and / or the number of SLPRS symbols according to the SL PRS configuration information may be selected.

[0413] According to an embodiment of the present disclosure, for example, the UE may report available (TX) BWP and / or (TX) resource pool information to the base station or LMF so that the base station or LMF can select a specific SL MG from the reported (TX) BWP and / or (TX) resource pool.

[0414] For example, if the base station allocates SL PRS resources for UE transmission, the UE may determine which MGs transmit the SL PRS in at least one of the following.

[0415] For example, starting from the time when the base station receives the DCI indicating the activation of the SL MG index, or from the time when the UE receives the RRC, or from the time when the UE reports to the base station a confirmation message confirming the receipt of the RRC, the SL MG corresponding to the earliest SL MG index in time can be determined as the SL MG that sends the SL PRS, and / or the start time of the SL MG can be determined as a reference point associated with determining the SL PRS sending resources.

[0416] For example, starting from the reference point, based on the (pre-)configured SL PRS resource set or SL PRS resource configuration information, the earliest SL logical time slot in time after the offset associated with the SL PRS resource set and / or the offset associated with the SL PRS resource defined as the SL logical time slot in the SLMG can be selected as the time slot in which the first SL PRS in the SL MG is sent.

[0417] According to various embodiments of the present disclosure, if SL measurement gaps are used to improve SL positioning accuracy, a method for selecting a measurement gap according to channel conditions and UE operating conditions and a method for effectively selecting SL PRS transmission resources in the measurement gap may be proposed.

[0418] According to an embodiment of the present disclosure, for example, in order to improve SL positioning accuracy, it is necessary to configure a measurement gap in a resource pool for SL communication and define a frequency resource during the measurement gap.

[0419] According to an embodiment of the present disclosure, if measurement gaps are used in a resource pool for SL communication to improve SL positioning accuracy, a method and operation for configuring an SL positioning frequency layer associated with the measurement gap and a device supporting the method and operation may be proposed.

[0420] According to an embodiment of the present disclosure, for example, if a UE is triggered to select a SL PRS transmission resource for SL positioning while operating in a resource pool for SL communication, the UE may select and send the SL PRS transmission resource based on the configuration of the SL positioning frequency layer (SL PFL) in a SL measurement gap (SL MG) that may provide a wider bandwidth than the resource pool. For example, a SL MG may be defined (in advance) for each resource pool, and the SL PFL may be configured (in advance) independently of the resource pool and the MG. For example, an associated SL PFL may be configured (in advance) for each SL MG.

[0421] For example, if one or more SL MGs are configured for each resource pool, and each allowed SL PRS configuration in the SL MG (and / or associated SL PFL) is configured (in advance), the UE can send the SLPRS based on the SL positioning requirements by selecting a SL MG (and / or SL PFL) that allows the SL PRS configuration to meet requirements such as SL positioning accuracy and positioning delay. For example, as described above, the selected SL MG index (and / or SL PFL index) can be sent to the base station or LMF or other UEs participating in the SL positioning operation.

[0422] For example, by sending the SL PRS using a (pre)configured SL MG (and / or SL PFL) (as described above), for example, because the SL PRS transmission resources are not selected in a dynamic or on-demand manner, SL positioning delay problems may occur, for example, if the preconfigured resources are reselected, the PDB may not be satisfied, for example, the SL MG (and / or SL PFL) information between the out-of-coverage (OOC) UE and the in-coverage (INC) UE may not be the same. For example, because the SL PRS resources unnecessarily reserve channel resources, resource utilization may not be optimized in terms of system performance. For example, (in order to solve these problems) the SL MG and / or SLPFL for SL positioning can be configured based on the UE's request (on-demand) in at least one of the following.

[0423] - For example, if the base station or LMF allocates SL PRS resources based on the reception and confirmation time of the RRC or MAC CE or DCI indicating the SL PRS resources, a periodic or dynamic SL MG can be generated, which includes a starting time slot that is the earliest SL logical time slot in time after a (preset) offset or an offset indicated by the RRC or MAC CE or DCI.

[0424] - For example, based on the sensing operation of the UE, a periodic or dynamic SL MG may be generated to include time and frequency intervals where the number of SL PRS candidate transmission resources for RSRP measurement associated with the SL PRS candidate transmission resources is below a certain threshold that is above a certain threshold.

[0425] - For example, when operating SL DRX, a periodic or dynamic SL MG can be generated to include one or more SL PRS candidate transmission resources, for which the RSRP measurement value associated with the SL PRS candidate transmission resources is lower than a specific threshold during the current and / or future on-duration and / or active time of the RX UE.

[0426] - For example, in an unlicensed band, when operating SL positioning, a dynamic SL MG may be generated so that the number of SL PRS candidate transmission resources that can perform SL PRS transmission based on a short-term listen-before-talk (LBT) (e.g., type2-LBT) within a channel occupation time (COT) shared by a base station or other UEs (participating in SL positioning) is above a certain threshold.

[0427] - For example, the SL MG may be generated to include SL PRS candidate transmission resources with CBR measurements below a certain threshold.

[0428] According to various embodiments of the present disclosure, if measurement gaps are used within a resource pool for SL communication to improve SL positioning accuracy, a method of configuring an SL positioning frequency layer associated with the measurement gaps in consideration of SL DRX and unlicensed band operations may be proposed.

[0429] According to an embodiment of the present disclosure, for example, in order to perform SL positioning, it is necessary to preliminarily explore whether there is a UE willing to participate in SL positioning as an S-UE in a neighboring area.

[0430] According to an embodiment of the present disclosure, a method and operation for performing SL positioning based on a process for discovering an S-UE through a UE discovery process and a device supporting the method and operation may be proposed.

[0431] According to an embodiment of the present disclosure, for example, if a base station or LMF initiates SL positioning, SL positioning may be performed in at least one of the following.

[0432] - For example, if the base station or LMF requests SL positioning to the T-UE, the T-UE may form a SL positioning group and / or may perform a SL positioning process in at least one of the following.

[0433] - For example, the T-UE can send a Direct Communication Request (DCR) message to neighboring UEs in the form of a broadcast / multicast message (e.g., Positioning Request procedure).

[0434] - For example, the DCR message within the message may include an ID indicating that the DCR message is for a SL location service

[0435] - For example, the ID may be an ID associated with an application.

[0436] - For example, the ID may be a L1 / L2 destination ID, which indicates that the L1 / L2 destination ID is a positioning service, or may be a source ID of the T-UE.

[0437] - For example, the ID may also indicate the SL positioning method (e.g., absolute / relative positioning, TDOA / RTT / angle-based positioning, UE / UE-assisted positioning, etc.).

[0438] - For example, the ID may be a group ID used for multicast-based positioning.

[0439] - For example, the T-UE may receive a Direct Communication Accept (DCA) message associated with a DCR and / or the T-UE may form a SL positioning group DCR with UEs that have sent a Direct Communication Accept (DCA) message associated with a DCR (Positioning Acceptance Procedure).

[0440] - For example, the T-UE may initiate the SL positioning procedure to each UE via a PC5 connection (eg, PC5-RRC, PC5-unicast link) (established via a DCA message).

[0441] - For example, capability request messages and response messages associated with SL positioning may be exchanged between T-UEs and S-UEs within a SL positioning group.

[0442] - For example, if the UE previously performed groupcast, UE capability exchange associated with SL positioning may not be performed because UE groups may have been formed according to UE capabilities.

[0443] - For example, SL positioning assistance data request messages and response messages associated with SL positioning may be exchanged between the T-UE and the S-UE within the SL positioning group in at least one of the following.

[0444] - SL positioning mode (UE assisted / based)

[0445] - SL positioning type (absolute / relative)

[0446] - SL positioning method (SL TDOA / RTT / angle / UE-ID)

[0447] - SL PRS configuration information (e.g., SL PRS resource set / resource ID, SL PRS comb size, # symbol, SL PRSRE offset)

[0448] - For example, a silent mode may also be included, wherein the silent mode may also be used to prevent resource conflicts between UEs, for example, if the channel congestion level is high.

[0449] - For example, if the T-UE and S-UE are connected to different base stations, the S-UE may report the SL positioning assistance data transmitted from the TS-UE to the base station that has established an RRC connection with the S-UE itself.

[0450] - For example, the S-UE may send information of a TX resource pool for the S-UE's own use to the T-UE in response.

[0451] - For example, measurements associated with the desired SL positioning by sending and receiving SL PRS may be performed within the SL positioning group.

[0452] - For example, if the S-UE performs measurement, the T-UE may perform a measurement result request, and the S-UE may transmit the measurement result to the T-UE through a response.

[0453] - For example, the base station or LMF may request the T-UE to report the SL measurement result (or positioning result) via RRC / MAC CE / DCI.

[0454] - For example, the T-UE may report the SL measurement results (or positioning results) within a specific threshold to the base station or LMF after the time of requesting to report the SL measurement results (e.g., UE assisted).

[0455] - For example, a specific threshold may be configured per resource pool as UE common, or a specific threshold may be signaled individually to the UE via RRC / MAC CE / DCI requesting reporting of SL measurement results.

[0456] - For example, whether the UE reports the measurement result or the positioning result may be distinguished by at least one of the following.

[0457] - For example, it can be implicitly determined based on the SL positioning method determined by the upper layer.

[0458] - For example, if it is indicated / determined to perform UE-assisted SL positioning, the T-UE may report the measurement result, or if it is indicated / determined to perform UE-based SL positioning, the T-UE may report the positioning result.

[0459] - For example, via RRC / MAC CE / DCI requesting to report SL measurement results or positioning results, the request for SL measurement results (or positioning results) can be indicated by distinguishing it as 1-bit signaling

[0460] For example, if a base station or LMF requests a T-UE to perform SL positioning to its neighboring UEs (eg, if the T-UE is an out-of-coverage (OOC) UE), the requested UE may detect whether there are any T-UEs in its neighboring area.

[0461] - For example, if a T-UE is detected via relay discovery or DCR / DCA, etc., the requested UE may instruct the T-UE to form a SL positioning group and perform a SL positioning procedure.

[0462] - For example, the requested UE may initiate to form a SL positioning group including the T-UE, and may perform the SL positioning process based on the formed SL positioning group.

[0463] - For example, if SL TDOA is performed, the S-UE may report the SL PRS-based measurement results sent by the T-UE to the requested UE, or, for example, the T-UE may report the SL PRS-based measurement results sent by the S-UE to the requested UE.

[0464] - For example, depending on the method of reporting measurement results or reporting positioning results, the requested UE may report the results to the base station or LMF within a specific threshold time relative to the requested time.

[0465] - For example, if the requested UE has UE-to-network (U2N) relay capability and the requested UE has established U2N relay with the T-UE, the requested UE may be a UE that is not in the SL positioning group.

[0466] - For example, if the UE initiates SL positioning to estimate its own position or the position of another UE, SL positioning may be performed in at least one of the following.

[0467] - For example, if the T-UE initiates SL positioning, the T-UE can send a Direct Communication Request (DCR) message to neighboring UEs in the form of a broadcast / multicast message (eg, positioning request procedure).

[0468] - For example, the T-UE may receive a Direct Communication Accept (DCA) message associated with the DCR and / or the T-UE may form a SL positioning group (Positioning Acceptance Procedure) with the UE that has sent the DCA message.

[0469] - For example, the T-UE may initiate the SL positioning procedure to each UE via the PC5 connection (e.g. PC5-RRC, PC5-unicast link) (established via the DCA message).

[0470] - For example, measurements associated with the required SL positioning may be performed by sending and receiving SL PRS within a SL positioning group.

[0471] - For example, in case of UE-based SL positioning, the T-UE can perform positioning and can terminate.

[0472] - For example, in the case of UE-assisted SL positioning, the T-UE may request positioning calculation from the base station or LMF, and / or the T-UE may send a PUCCH / PUSCH indicating a request to the base station to calculate the position of the T-UE without performing the existing LPP procedure.

[0473] - For example, to ensure low latency for requests for SL positioning calculations, a special SR ID associated with the SL positioning calculation request may be allocated at the time of the scheduling request (SR).

[0474] - For example, PUCCH / PUSCH resources may be allocated to the base station within a time interval within a specific threshold from the time when the base station receives the SR from the T-UE, and / or the T-UE may report the SL measurement result via PUCCH / PUSCH.

[0475] - For example, the base station or LMF may calculate the position of the T-UE based on the reported SL measurement results, and / or may feed back the result of the positioning calculation to the T-UE

[0476] - For example, a measurement report reporting a measurement associated with a SL PRS for SL positioning between UEs may include whether the measurement was measured by a target UE or by an anchor UE participating in SL positioning and performing an operation of sending or receiving SL PRS. For example, in the case of performing SL-TDOA, based on the measurement report (as described above), an entity estimating the position of the target UE may determine whether the measurement is a measurement based on a PRS measurement sent by the target UE to one or more server UEs or a measurement based on a PRS measurement sent by one or more server UEs to the target UE.

[0477] According to various embodiments of the present disclosure, processes and methods of SL positioning such as UE discovery, forming a SL positioning group, sending and receiving SLPRS, and reporting SL measurement results may be proposed to perform SL positioning through a UE sending process.

[0478] Fig.17 2 is a diagram for explaining a method for performing wireless communication associated with SL positioning based on an embodiment of the present disclosure. Fig.17 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0479] refer to Fig.17 According to an embodiment of the present disclosure, for example, SL positioning may be triggered by UE / gNB / LMF, etc. For example, a SL positioning group may be formed by the UE (UE controlled). For example, the target UE may send a request message to the server UE requesting to participate in SL positioning. For example, the server UE may send an acceptance message to the target UE to accept participation in SL positioning (if it is determined by considering its capabilities that it can be used to support the positioning of the target UE). For example, based on the acceptance message for SL positioning, a SL positioning group between the target UE and the server UE may be formed (established).

[0480] For example, data communication between a server UE and a target UE forming a SL positioning group may be performed separately. For example, a process for establishing a PC5 link between a server UE and a target UE may be performed separately. Specifically, for example, vehicle-to-everything (V2X) data communication may be performed together with SL positioning. Thus, for example, a process in which the identities of the server UE / target UE are exchanged (e.g., using an identity mapped by a data service) to establish a data communication link between the server UE and the target UE may be performed separately. Therefore, because the process for forming a SL positioning group may not be linked to the process for V2X data communication, the efficiency and low latency of positioning / communication may be reduced.

[0481] Fig.18 is a diagram for explaining a process of performing wireless communication associated with SL positioning 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.

[0482] refer to Fig.18 According to an embodiment of the present disclosure, for example, the target UE and the server UE may obtain information related to the PRS configuration. For example, the target UE may trigger SL positioning. For example, a SL positioning group (UE controlled) may be formed by the UE.

[0483] For example, the server UE may determine a (default) destination ID for establishing a PC5 connection (e.g., PC5-RRC, PC5-unicast link). For example, the destination ID may be mapped to a V2X service type. For example, the V2X service type may be a type for a V2X service, which may be identified by an intelligent transport system (ITS)-application identifier (AID), a provider service identifier (PSDI), or an application identifier (AID). For example, V2X services (e.g., ITS services) may include public transportation, emergency alerts, parking management, automatic vehicle identification, cruise assist highway systems, vehicle-to-vehicle (V2V) safety and awareness, cooperative awareness (CA), decentralized environmental notification (DEN), etc.

[0484] For example, the target UE may send a direct communication message (DCR) message to the server UE for initiating establishment of a PC5 connection (for (V2X) services). For example, the DCR message may include information requesting participation in the SL positioning (group). For example, the DCR message may include information indicating a service for SL positioning (e.g., absolute SL positioning, relative SL positioning, quality of service (QoS) / SL positioning error, etc.). For example, the DCR message may include information indicating a SL positioning method (e.g., TDOA, RTT, AoA, bilateral RTT, etc.). For example, the DCR message may include information indicating a SL positioning mode (e.g., UE-assisted, UE-based, independent, etc.).

[0485] For example, the server UE may send a DCA message to the target UE to establish a PC5 connection (for (V2X) services). For example, the DCA message may be associated with a DCR message.

[0486] For example, a PC5 association (relative to a V2X service) may be established based on a DCA message. For example, a DCA message may include information for accepting participation in a SL positioning (group). For example, a SL positioning group may be established based on a DCA message (simultaneously with a PC5 connection, before a PC5 connection, or after a PC5 connection).

[0487] Thus, for example, data communication between a server UE and a target UE with which a SL positioning group is formed may be performed together. For example, a process for establishing a PC5 link between the server UE and the target UE may be performed together. Specifically, for example, if vehicle-to-everything (V2X) data communication is performed together with SL positioning, a process in which the identities of the server UE / target UE are exchanged (e.g., using an identity mapped by a data service) to establish a link for data communication between the server UE and the target UE may be performed together. Thus, by associating the process for forming a SL positioning group with the process for V2X data communication, the efficiency and low latency of positioning / communication may be increased.

[0488] For example, whether to apply the rules and / or the parameter values ​​associated with the proposed method / rules may 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 may 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 may be specifically (or differently or independently) configured / allowed for the SL mode 1 CG 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 may 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 rule and / or the parameter value associated with the proposed method / rule can be specifically (or differently or independently) configured / allowed for the resource pool. For example, whether to apply the rule and / or the parameter value associated with the proposed method / rule can be specifically (or differently or independently) configured / allowed for whether the PSFCH resource is configured in the resource pool. For example, whether to apply the rule and / or the parameter value associated with the proposed method / rule can be specifically (or differently or independently) configured / allowed for the source (L2) ID. For example, whether to apply the rule and / or the parameter value associated with the proposed method / rule can be specifically (or differently or independently) configured / allowed for the destination (L2) ID. For example, whether to apply the rule and / or the parameter value associated with the proposed method / rule can be specifically (or differently or independently) configured / allowed for the PC5RRC connection link. For example, whether to apply the rule and / or the parameter value associated with the proposed method / rule 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 may 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 may 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 may 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 may 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 the case where (from the perspective of a specific UE) PSFCH TX and PSFCH RX (and / or multiple PSFCH TX (exceeding UE capabilities)) overlap (and / or the 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 the case where the RX UE actually (successfully) receives the PSCCH (and / or PSSCH) (re)transmission from the TX UE.

[0489] 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 through 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 through a predefined (physical layer or higher layer) channel / signal (e.g., SL MAC CE, PC5 RRC)).

[0490] 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).

[0491] 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 a 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 a network, a base station or a UE. For example, an operation configured by a network / base station may refer to a base station (pre) configuring to a UE via higher layer RRC signaling or a base station configuring / sending a signal to a UE via a MAC CE or a base station sending a signal to a UE via a DCI.

[0492] 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.

[0493] refer to Fig.19According to an embodiment of the present disclosure, in step S1910, 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 send a direct communication request (DCR) message including information related to a service related to side link (SL) positioning. In step S1930, for example, the first device may receive a direct communication acceptance (DCA) message related to the DCR message.

[0494] Additionally or alternatively, the service-related information may include information for requesting participation in a service related to SL positioning.

[0495] Additionally or alternatively, the service-related information may include information indicating services related to SL positioning.

[0496] Additionally or alternatively, the service-related information may include a destination ID mapped to a service related to SL positioning.

[0497] Additionally or alternatively, the service-related information may include information related to the SL positioning method.

[0498] Additionally or alternatively, the service-related information may include information related to a mode related to SL positioning.

[0499] Additionally or alternatively, the first device may establish a PC5 connection with the second device based on receiving a DCA message from the second device.

[0500] Additionally or alternatively, the first device may send a request message for requesting assistance data for SL positioning.

[0501] Additionally or alternatively, the request message may include information related to PRS configuration.

[0502] Additionally or alternatively, the first device may receive assistance data for SL positioning from the second device.

[0503] Additionally or alternatively, the assistance data may include information of a set of resources configured for the second device.

[0504] Additionally or alternatively, the first device may receive request information from the third device, the request information requesting a positioning report related to the SL location or a measurement report related to the SL location.

[0505] Additionally or alternatively, the first device may send a positioning report or a measurement report to the third device.

[0506] Additionally or alternatively, the measurement report may include entity information related to measurements related to the SL location.

[0507] Additionally or alternatively, the first device may transmit request information for calculating the location of the first device to the base station or a location management function (LMF) via a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH).

[0508] Additionally or alternatively, the first device may receive information related to the location of the first device from the base station or the LMF.

[0509] Additionally or alternatively, the first device may send a scheduling request (SR) for requesting resources for the PUCCH or the PUSCH to the third device.

[0510] Additionally or alternatively, the SR may include an ID associated with the request information.

[0511] The proposed method can be adapted to a device according to various embodiments of the present disclosure. First, a memory (104) of a first device (100) may have instructions based on execution by a processor (102) to enable the first device (100) (e.g., processor (102), transceiver (106)) to perform an operation. For example, the operation may include the first device (100) (e.g., processor (102), transceiver (106)): obtaining information related to a positioning reference signal (PRS) configuration, wherein 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 a PRS resource, or information related to a starting symbol of a PRS resource; sending a direct communication request (DCR) message including information related to a service related to side link (SL) positioning; and receiving a direct communication acceptance (DCA) message related to the DCR message.

[0512] 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, which is connected to the at least one processor and stores instructions, which cause the first device to perform operations based on being executed by the at least one processor. For example, the operation includes: obtaining information related to a positioning reference signal (PRS) configuration, wherein 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 a PRS resource, or information related to a starting symbol of a PRS resource; sending a direct communication request (DCR) message including information related to a service related to side link (SL) positioning; and receiving a direct communication acceptance (DCA) message related to the DCR message.

[0513] 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 connected to the at least one processor and storing instructions, which cause the first device to perform operations based on being executed by the at least one processor. For example, the operation includes: obtaining information related to a positioning reference signal (PRS) configuration, wherein 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 a PRS resource, or information related to a starting symbol of a PRS resource; sending a direct communication request (DCR) message including information related to a service related to side link (SL) positioning; and receiving a direct communication acceptance (DCA) message related to the DCR message.

[0514] According to an embodiment, a non-transitory computer-readable storage medium storing instructions may be provided. The instructions cause a 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 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 a PRS resource, or information related to a starting symbol of a PRS resource; sending a direct communication request (DCR) message including information related to a service related to side link (SL) positioning; and receiving a direct communication acceptance (DCA) message related to the DCR message.

[0515] Fig. 20 A method for performing wireless communication by a second device according to an embodiment of the present disclosure is shown. Fig. 20 The method can be combined with various embodiments of the present disclosure.

[0516] refer to Fig. 20According to an embodiment of the present invention, in step S2010, 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 receive a direct communication request (DCR) message including information related to a service related to side link (SL) positioning. In step S2030, for example, the second device may send a direct communication acceptance (DCA) message related to the DCR message.

[0517] For example, the service-related information may include information for requesting participation in a service related to SL positioning.

[0518] For example, the service-related information may include information indicating services related to SL positioning.

[0519] For example, the service-related information may include a destination ID mapped to a service related to SL positioning.

[0520] For example, the service-related information may include information related to the method of SL positioning.

[0521] For example, the service-related information may include information about a mode related to SL positioning.

[0522] For example, the second device may establish a PC5 connection with the first device based on a DCA message being sent to the first device.

[0523] For example, a request message for requesting assistance data for SL positioning may be received.

[0524] For example, the request message may include information related to PRS configuration.

[0525] For example, the second device may send assistance data for SL positioning to the first device.

[0526] For example, the assistance data may include information for a set of resources configured for the second device.

[0527] For example, request information for requesting a positioning report related to the SL location or a measurement report related to the SL location may be received from the third device.

[0528] For example, a positioning report or a measurement report may be sent to the third device.

[0529] For example, the measurement report may include entity information about measurements related to the SL location.

[0530] For example, request information for calculating the location of the first device via a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH) may be transmitted to a base station or a location management function (LMF).

[0531] For example, information related to the location of the first device may be received from a base station or an LMF.

[0532] For example, a scheduling request (SR) for requesting resources for the PUCCH or the PUSCH may be sent to the third device.

[0533] For example, the SR may include an ID associated with the request information.

[0534] The proposed method can be adapted to a device according to various embodiments of the present disclosure. First, the memory (204) of the second device (200) may have instructions for causing the second device (200) (e.g., processor (202), transceiver (206)) to perform operations based on execution by the processor (202). For example, the operation may include being executed by the second device (200) (e.g., processor (202), transceiver (206)): obtaining information related to positioning reference signal (PRS) configuration, wherein the information related to PRS configuration includes at least one of the following: 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 direct communication request (DCR) message including information related to a service related to side link (SL) positioning; and sending a direct communication acceptance (DCA) message related to the DCR message.

[0535] 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, which is connected to the at least one processor and stores instructions, which cause the second device to perform operations based on being executed by the at least one processor. For example, the operation includes: obtaining information related to a positioning reference signal (PRS) configuration, wherein 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 a PRS resource, or information related to a starting symbol of a PRS resource; receiving a direct communication request (DCR) message including service-related information related to side link (SL) positioning; and sending a direct communication acceptance (DCA) message related to the DCR message.

[0536] 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 connected to the at least one processor and storing instructions, which cause the second device to perform operations based on being executed by the at least one processor. For example, the operation includes: obtaining information related to a positioning reference signal (PRS) configuration, wherein 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 a PRS resource, or information related to a starting symbol of a PRS resource; receiving a direct communication request (DCR) message including information related to a service related to side link (SL) positioning; and sending a direct communication acceptance (DCA) message related to the DCR message.

[0537] According to an embodiment, a non-transitory computer-readable storage medium storing instructions may be provided. The instructions cause a second 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 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 a PRS resource, or information related to a starting symbol of a PRS resource; receiving a direct communication request (DCR) message including information related to a service related to side link (SL) positioning; and sending a direct communication acceptance (DCA) message related to the DCR message.

[0538] Various embodiments of the present disclosure may be combined with each other.

[0539] Hereinafter, devices to which various embodiments of the present disclosure can be applied will be described.

[0540] The various descriptions, functions, processes, proposals, methods and / or operation flows of the present disclosure described herein may be applied to, but not limited to, various fields requiring wireless communication / connection (e.g., 5G) between devices.

[0541] 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.

[0542] Fig.21 A communication system 1 according to an embodiment of the present disclosure is shown. Fig.21 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0543] refer to 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, without limitation, 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.

[0544] 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), etc. For example, the LTE-M technology may be implemented as at least any one of various standards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-bandwidth limited (non-BL), 5) LTE-MTC, 6) LTE machine type communication and / or 7) LTE M, and is not limited to the above names. Additionally or alternatively, the wireless communication 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 by various names.

[0545] 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., sidelink communication) with each other without going through the BS / network. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). An IoT device (e.g., a sensor) may perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0546] Wireless communication / connection 150a, 150b or 150c may be established between wireless devices 100a to 100f / BS 200 or BS200 / BS 200. Here, the wireless communication / connection may 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 may send / receive radio signals to / from each other through wireless communication / connections 150a and 150b. For example, wireless communication / connections 150a and 150b may 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 a resource allocation process may be performed based on various proposals of the present disclosure.

[0547] Fig. 22 A wireless device according to an embodiment of the present disclosure is shown. Fig. 22 The embodiments of the present disclosure may be combined with various embodiments of the present disclosure.

[0548] refer to Fig. 22 , the first wireless device 100 and the second wireless device 200 may transmit radio signals via various RATs (eg, 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.

[0549] 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 a second information / signal through the transceiver 106, and then store the information obtained by processing the second information / signals in the (one or more) memories 104. The memory (one or more) 104 may be connected to the processor (one or more) 102 and may store various information related to the operation of the processor (one or more) 102. For example, the memory (one or more) 104 may store software code including instructions for executing part or all of the processing controlled by the processor (one or more) 102 or for executing the description, function, process, proposal, method and / or operation flow disclosed in this document. Here, the processor (one or more) 102 and the memory (one or more) 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver (one or more) 106 may be connected to the processor (one or more) 102 and transmit and / or receive radio signals through the antenna (one or more) 108. Each transceiver 106 may include a transmitter and / or a receiver. The transceiver (one or more) 106 may be used interchangeably with the radio frequency (RF) unit (one or more). In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0550] 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. The memory (one or more) 204 may be connected to the processor (one or more) 202 and may store various information related to the operation of the processor (one or more) 202. For example, the memory (one or more) 204 may store software code including commands for executing part or all of the processing controlled by the processor (one or more) 202 or for executing the description, function, process, proposal, method and / or operation flow disclosed in this document. Here, the processor (one or more) 202 and the memory (one or more) 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver (one or more) 206 may be connected to the processor (one or more) 202 and transmit and / or receive radio signals through the antenna (one or more) 208. Each transceiver 206 may include a transmitter and / or a receiver. The transceiver (one or more) 206 may be used interchangeably with the RF unit (one or more). In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0551] 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.

[0552] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more application specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field programmable gate arrays (FPGAs) may be included in one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204, thereby being driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods and / or operational flows disclosed in this document may be implemented using software or firmware in the form of codes, commands and / or command sets.

[0553] 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.

[0554] 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.

[0555] 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 disclosure may be combined with various embodiments of the present disclosure.

[0556] refer to Fig.23 The signal processing circuit 1000 may include a scrambler 1010, a modulator 1020, a layer mapper 1030, a precoder 1040, a resource mapper 1050, and a signal generator 1060. 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 Fig. 22 The transceiver (106, 206) is used to implement block 1060.

[0557] 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., a UL-SCH transport block, a DL-SCH transport block). The radio signal may be transmitted through various physical channels (e.g., PUSCH and PDSCH).

[0558] 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.

[0559] The resource mapper 1050 may 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 may generate a radio signal from the mapped modulation symbols, and the generated radio signal may 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.

[0560] 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. For example, the wireless device (e.g., 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.

[0561] 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 disclosure may be combined with various embodiments of the present disclosure.

[0562] refer to 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.

[0563] 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, wireless devices can be used in mobile or fixed places.

[0564] exist Fig.24In the wireless device (100, 200), various elements, components, units / parts and / or modules in the wireless device (100, 200) can all be connected to each other through a wired interface, or at least part of them can be wirelessly connected through the communication unit 110. For example, in each of the wireless devices (100, 200), the control unit 120 and the communication unit 110 can be connected by wire, and the control unit 120 and the first unit (e.g., 130, 140) can be wirelessly connected 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.

[0565] Hereinafter, the implementation will be described in detail with reference to the accompanying drawings. Fig.24 .

[0566] 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 disclosure may be combined with various embodiments of the present disclosure.

[0567] refer to 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.

[0568] 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.

[0569] 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.

[0570] 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 disclosure may be combined with various embodiments of the present disclosure.

[0571] refer to 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.

[0572] 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 with a destination set, and the like.

[0573] For example, the communication unit 110 may receive map data, traffic information data, etc. from an external server. The autonomous driving unit 140d may generate an autonomous driving path and a driving plan from the acquired data. The control unit 120 may control the drive unit 140a so that the vehicle or autonomous vehicle 100 may 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 may aperiodically / periodically acquire the most recent traffic information data from an external server and acquire surrounding traffic information data from adjacent vehicles. In the middle of autonomous driving, the sensor unit 140c may acquire vehicle status and / or surrounding environment information. The autonomous driving unit 140d may update the autonomous driving path and driving plan based on the newly acquired data / information. The communication unit 110 may transmit information about the vehicle position, autonomous driving path, and / or driving plan to an external server. The external server may predict traffic information data using AI technology, etc. based on information collected from the vehicle or autonomous vehicle, and provide the predicted traffic information data to the vehicle or autonomous vehicle.

[0574] 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: Get information related to the 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 direct communication request (DCR) message including information related to a service related to a side link (SL) positioning; and A direct communication accept (DCA) message is received in association with the DCR message.

2. The method according to claim 1, in, The information related to the service includes information for requesting participation in the service related to the SL positioning.

3. The method according to claim 1, in, The information related to the service includes information indicating the service related to the SL positioning.

4. The method according to claim 1, in, The information related to the service includes a destination ID mapped to the service related to the SL positioning.

5. The method according to claim 1, in, The information related to the service includes information related to the SL positioning method.

6. The method according to claim 1, in, The information related to the service includes information related to a mode related to the SL positioning.

7. The method according to claim 1, further comprising: Based on receiving the DCA message from the second device, a PC5 connection is established with the second device.

8. The method according to claim 1, further comprising: sending a request message for requesting assistance data for said SL positioning, The request message includes the information related to the PRS configuration.

9. The method according to claim 1, further comprising: receiving assistance data for said SL positioning from said second device, The auxiliary data includes information about a set of resources configured for the second device.

10. The method according to claim 1, further comprising: receiving a request message from a third device, the request message requesting a positioning report related to the SL location or a measurement report related to the SL location; as well as Send the positioning report or the measurement report to the third device.

11. The method according to claim 10, in, The measurement report includes entity information related to measurements related to the SL location.

12. The method according to claim 1, further comprising: Sending request information for calculating the location of the first device to a base station or a location management function (LMF) via a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH); as well as Information related to the location of the first device is received from the base station or the LMF.

13. The method according to claim 12, further comprising: sending a scheduling request (SR) for requesting resources for the PUCCH or the PUSCH to a third device, The SR includes an ID related to the request information.

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 connected to the at least one processor and storing instructions, the instructions causing the first device to perform operations based on execution by the at least one processor, the operations comprising: Get information related to the 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 direct communication request (DCR) message including information related to a service related to a side link (SL) positioning; and A direct communication accept (DCA) message is received in association with the DCR message.

15. An apparatus configured to control a first 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 first device to perform operations based on execution by the at least one processor, the operations comprising: Get information related to the 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 direct communication request (DCR) message including information related to a service related to a side link (SL) positioning; and A direct communication accept (DCA) message is received in association with the DCR message.

16. A non-transitory computer-readable storage medium storing instructions, the instructions, upon execution by at least one processor, causing the first device to perform operations, the operations comprising: Get information related to the 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 direct communication request (DCR) message including information related to a service related to a side link (SL) positioning; and A direct communication accept (DCA) message is received in association with the DCR message.

17. A method for performing wireless communication by a second device, the method comprising: Get information related to the 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 direct communication request (DCR) message including information related to a service related to a side link (SL) positioning; and A direct communication accept (DCA) message is sent in association with the DCR message.

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 execution by the at least one processor, the operations comprising: Get information related to the 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 direct communication request (DCR) message including information related to a service related to a side link (SL) positioning; and A direct communication accept (DCA) message is sent in association with the DCR message.

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 execution by the at least one processor, the operations comprising: Get information related to the 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 direct communication request (DCR) message including information related to a service related to a side link (SL) positioning; and A direct communication accept (DCA) message is sent in association with the DCR message.

20. A non-transitory computer-readable storage medium storing instructions, the instructions causing the second device to perform operations upon execution by at least one processor, the operations comprising: Get information related to the 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 direct communication request (DCR) message including information related to a service related to a side link (SL) positioning; and A direct communication accept (DCA) message is sent in association with the DCR message.

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