Method for side link positioning in a wireless communication system

Abstract

A method and apparatus for performing positioning based on a sidelink positioning reference signal in a wireless communication system are provided. [Solution] A method for performing sidelink positioning in a wireless communication system according to one embodiment of the present disclosure may include a step of a first terminal receiving allocation information for one or more terminals including the first terminal from a base station, where the one or more terminals receive their respective allocation information from the base station, and a step of the first terminal transmitting the allocation information of the first terminal and the allocation information for the one or more terminals to a second terminal; a step of the first terminal transmitting an SL PRS to the second terminal based on the allocation information of the first terminal, where the second terminal receives the SL PRS from the one or more terminals based on the allocation information for the one or more terminals received from the first terminal, and a step of the first terminal receiving measurement information from the second terminal; and a step of the first terminal reporting the measurement information to the base station.

Description

[Technical Field]

[0001] This disclosure relates to a method and apparatus for performing positioning based on a sidelink positioning reference signal (PRS) in a wireless communication system. [Background technology]

[0002] Device-to-device (D2D) communication refers to direct communication between one device and another. Direct communication means that one device communicates with another device without going through other network devices, either through network control or at the device's own discretion.

[0003] Such inter-terminal communication can be applied to vehicle communication, commonly known as V2X (vehicle-to-everything). V2X communication refers to a communication method that exchanges or shares information such as traffic conditions while communicating with road infrastructure and other vehicles during driving. V2X-based services can include, for example, autonomous driving services, remote vehicle control services, interactive services such as games, and high-capacity short-range audio / video services such as AR and VR. Based on the performance requirements for supporting various V2X-based services through the 5G system, specific additional technologies required for the LTE (Long Term Evolution) and NR (New Radio) systems, which are radio connectivity technologies (RATs) within the 5G system, are currently under discussion. [Overview of the Initiative] [Problems that the invention aims to solve]

[0004] The technical problem addressed in this disclosure relates to a method and apparatus for performing sidelink positioning in a wireless communication system.

[0005] Other technical issues in this disclosure relate to methods and apparatus for providing allocation information based on whether side links can be formed between terminals.

[0006] Another technical issue of this disclosure relates to a method and apparatus for configuring assignment information for a sidelink positioning reference signal (SL PRS).

[0007] Furthermore, another technical issue of this disclosure relates to a method and apparatus for configuring sequence information of assignment information for SL PRS.

[0008] Furthermore, another technical issue of this disclosure relates to a method and apparatus for configuring resource information for allocation information for SL PRS.

[0009] The technical challenges that this disclosure aims to address are not limited to those mentioned above, and other technical challenges not mentioned will be clearly evident to a person with ordinary skill in the art to which this disclosure pertains from the following description. [Means for solving the problem]

[0010] A method for performing sidelink positioning in a wireless communication system according to one aspect of the present disclosure may include the steps of: a first terminal receiving assignment information from a base station for at least one or more terminals including the first terminal, wherein each of the at least one or more terminals receives its respective assignment information from the base station; the first terminal transmitting its assignment information and the assignment information for at least one or more terminals to a second terminal; the first terminal transmitting an SL PRS to a second terminal based on the first terminal's assignment information, wherein the second terminal receives an SL PRS from each of the at least one or more terminals based on the assignment information for at least one or more terminals received from the first terminal; and the first terminal receiving measurement information from the second terminal; and the first terminal reporting the measurement information to a base station.

[0011] Furthermore, a method for performing sidelink positioning in a wireless communication system according to one aspect of the present disclosure may include the steps of: a first terminal receiving assignment information for at least one or more terminals, including the first terminal, from a base station; the first terminal transmitting the assignment information for at least one or more terminals to at least one or more terminals; the first terminal transmitting the assignment information for the first terminal and the assignment information for at least one or more terminals to a second terminal; the first terminal transmitting an SL PRS to the second terminal based on the assignment information for the first terminal, wherein the second terminal receives an SL PRS from each of the at least one or more terminals based on the assignment information for at least one or more terminals received from the first terminal, and the first terminal receiving measurement information from the second terminal; and the first terminal reporting the measurement information to a base station.

[0012] A method for performing sidelink positioning in a wireless communication system according to one aspect of the present disclosure may include the steps of: a first terminal transmitting assignment information for at least one or more terminals to at least one or more terminals; a first terminal transmitting the assignment information of the first terminal and the assignment information for at least one or more terminals to a second terminal; and a first terminal transmitting an SL PRS to the second terminal based on the assignment information of the first terminal, wherein the second terminal receives an SL PRS from each of the at least one or more terminals based on the assignment information for at least one or more terminals received from the first terminal, and the first terminal receives measurement information from the second terminal. [Effects of the Invention]

[0013] According to this disclosure, a method and apparatus for performing sidelink positioning in a wireless communication system can be provided.

[0014] According to this disclosure, a method and apparatus for providing allocation information based on whether or not side links can be formed between terminals can be provided.

[0015] According to this disclosure, a method and apparatus for configuring allocation information for SL PRS can be provided.

[0016] According to this disclosure, a method and apparatus for configuring sequence information for assignment information for SL PRS can be provided.

[0017] According to this disclosure, a method and apparatus for configuring resource information for allocation information for SL PRS can be provided.

[0018] The effects derived from this disclosure are not limited to those mentioned above, and any other effects not mentioned above will be clearly understood by a person with ordinary skill in the art to which this disclosure pertains from the following description. [Brief explanation of the drawing]

[0019] [Figure 1] This figure shows an example of a V2X scenario to which this disclosure may apply. [Figure 2] This figure shows an example of a V2X scenario to which this disclosure may apply. [Figure 3] This figure shows an example of a V2X scenario to which this disclosure may apply. [Figure 4] This figure shows an example of the services provided based on the side links to which this disclosure may apply. [Figure 5] This is a diagram illustrating the NR frame structure to which this disclosure may apply. [Figure 6] This figure shows the NR resource structure to which this disclosure may apply. [Figure 7] This disclosure provides an example of how to configure a V2X resource pool to which it may apply. [Figure 8] This disclosure provides an example of how to configure a V2X resource pool to which it may apply. [Figure 9] This figure shows a method for performing location measurement based on OTDOA (Observed Time Difference Of Arrival) to which this disclosure may apply. [Figure 10] This figure shows the configuration of the control plane and user plane for NRPP (NR positioning protocol) related to the present invention to which this disclosure may apply. [Figure 11] This figure shows a kombu pattern applicable to this disclosure. [Figure 12] This figure shows how to perform a circular prep based on DL PRS allocation patterns applicable to this disclosure. [Figure 13] This figure shows how to perform a circular prep based on DL PRS allocation patterns applicable to this disclosure. [Figure 14] This figure shows a DL PRS resource allocation method applicable to this disclosure. [Figure 15] This figure shows a method for performing sidelink-based positioning based on base station coverage and the feasibility of forming sidelink communication, applicable to this disclosure. [Figure 16] This figure shows a method for performing sidelink-based positioning based on base station coverage and the feasibility of forming sidelink communication, applicable to this disclosure. [Figure 17] This figure shows a method for performing sidelink-based positioning based on base station coverage, sidelink communication formation feasibility, and requested information applicable to this disclosure. [Figure 18] This figure shows a method for performing sidelink-based positioning based on base station coverage, sidelink communication formation feasibility, and requested information applicable to this disclosure. [Figure 19] This figure shows a method for performing sidelink-based positioning based on base station coverage and the feasibility of forming sidelink communication, applicable to this disclosure. [Figure 20] This figure shows a method for performing sidelink-based positioning based on base station coverage and the feasibility of forming sidelink communication, applicable to this disclosure. [Figure 21]This figure shows a method for performing sidelink-based positioning based on base station coverage, sidelink communication formation feasibility, and requested information applicable to this disclosure. [Figure 22] This figure shows a method for performing sidelink-based positioning based on base station coverage, sidelink communication formation feasibility, and requested information applicable to this disclosure. [Figure 23] This figure shows a method for performing sidelink-based positioning based on base station coverage and the feasibility of forming sidelink communication, applicable to this disclosure. [Figure 24] This figure shows a method for performing sidelink-based positioning based on base station coverage and the feasibility of forming sidelink communication, applicable to this disclosure. [Figure 25] This figure shows a method for performing sidelink-based positioning based on base station coverage, sidelink communication formation feasibility, and requested information applicable to this disclosure. [Figure 26] This figure shows a method for performing sidelink-based positioning based on base station coverage, sidelink communication formation feasibility, and requested information applicable to this disclosure. [Figure 27] This flowchart shows a method for performing sidelink-based positioning based on base station coverage and the feasibility of forming sidelink communication, applicable to this disclosure. [Figure 28] This flowchart shows a method for performing sidelink-based positioning based on base station coverage and the feasibility of forming sidelink communication, applicable to this disclosure. [Figure 29] This flowchart shows a method for performing sidelink-based positioning based on base station coverage and the feasibility of forming sidelink communication, applicable to this disclosure. [Figure 30] This figure shows a base station device and a terminal device to which this disclosure can be applied. [Modes for carrying out the invention]

[0020] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the attached drawings, so that they can be easily implemented by a person with ordinary skill in the art to which the present disclosure pertains. However, the present disclosure can be implemented in a variety of different forms and is not limited to the embodiments described herein.

[0021] In describing embodiments of this disclosure, if a specific description of a known configuration or function is deemed to obscure the gist of this disclosure, such detailed description is omitted. Furthermore, parts of the drawings that are not relevant to this disclosure are omitted, and similar parts are denoted by similar reference numerals.

[0022] In this disclosure, when one component is said to be “connected,” “joined,” or “linked” to another component, this can include not only a direct connection but also an indirect connection in which another component exists in between. Furthermore, when one component is said to “include” or “have” another component, this does not exclude the other component, unless otherwise stated, but rather means that it may include other components.

[0023] In this disclosure, terms such as "first," "second," etc., are used solely for the purpose of distinguishing one component from another, and do not limit the order or importance of the components unless otherwise specified. Accordingly, within the scope of this disclosure, a first component in one embodiment may be called a second component in another embodiment, and similarly, a second component in one embodiment may be called a first component in another embodiment.

[0024] In this disclosure, components that are distinguished from each other are used to clearly describe their respective characteristics and do not necessarily mean that the components are separate. That is, multiple components may be integrated to constitute a single hardware or software unit, or a single component may be distributed to constitute multiple hardware or software units. Accordingly, such integrated or distributed embodiments are also included in the scope of this disclosure without further mention.

[0025] In this disclosure, the components described in various embodiments are not necessarily essential components, and some may be optional components. Therefore, embodiments consisting of a subset of the components described in one embodiment are also included in the scope of this disclosure. Furthermore, embodiments that include additional components on top of the components described in various embodiments are also included in the scope of this disclosure.

[0026] This disclosure describes operations performed in a wireless communication network, where the operations performed in the wireless communication network may be performed in the process of controlling the network and transmitting or receiving signals by a system (e.g., a base station) that manages the wireless communication network, or in the process of transmitting or receiving signals by a terminal connected to the wireless network.

[0027] It is clear that various operations performed for communication with terminals in a network consisting of multiple network nodes, including a base station, can be performed by the base station or other network nodes. The term "base station (BS)" can be replaced with terms such as fixed station, Node B, eNodeB (eNB), ng-eNB, gNodeB (gNB), and access point (AP). Similarly, the term "terminal" can be replaced with terms such as UE (User Equipment), MS (Mobile Station), MSS (Mobile Subscriber Station), SS (Subscriber Station), and non-AP station (non-AP STA).

[0028] In this disclosure, "transmitting or receiving a channel" includes the meaning of transmitting or receiving information or signals through that channel. For example, "transmitting a control channel" means transmitting control information or signals through the control channel. Similarly, "transmitting a data channel" means transmitting data information or signals through the data channel.

[0029] The definitions of abbreviations used in this disclosure may be as follows:

[0030] D2D: Device to Device (communication)

[0031] DCI: Downlink Control Information

[0032] V2X: Vehicle to X (everything)

[0033] V2V: Vehicle to Vehicle

[0034] V2P: Vehicle to Pedestrian

[0035] V2I / N: Vehicle to Infrastructure / Network

[0036] SL: Sidelink

[0037] SCI: Sidelink Control Information

[0038] SFCI: Sidelink Feedback Control Information

[0039] PSSCH: Physical Sidelink Shared Channel

[0040] PSBCH: Physical Sidelink Broadcast Channel

[0041] PSCCH: Physical Sidelink Control Channel

[0042] PSDCH: Physical Sidelink Discovery Channel

[0043] PSFICH: Physical Sidelink Feedback Indication Channel

[0044] ProSe: (Device to Device) Proximity Services

[0045] SLSS: Sidelink Synchronization Signal

[0046] PSSID: Physical Sidelink Synchronization Identity

[0047] n SA ID : Sidelink group destination identity

[0048] N SL ID : Physical sidelink synchronization identity

[0049] SA: Scheduling assignment

[0050] TB: Transport Block

[0051] TTI: Transmission Time Interval

[0052] RB: Resource Block

[0053] In the following description, the term "NR system" is used to distinguish the various examples of this disclosure from existing systems, but the scope of this disclosure is not limited by these terms.

[0054] For example, NR systems support various subcarrier spacings (SCS) considering various scenarios, service requirements, and potential system compatibility. Furthermore, NR systems can support the transmission of physical signals / channels through multiple beams in order to overcome poor channel environments such as high path loss, phase noise, and frequency offset that occur at high carrier frequencies. This allows NR systems to support applications such as eMBB (enhanced Mobile Broadband), mMTC (massive Machine Type Communications) / uMTC (ultra Machine Type Communications), and URLLC (Ultra Reliable and Low Latency Communications). However, while the term NR system is used in this disclosure as an example of a wireless communication system, the term NR system itself is not limited to these features.

[0055] For example, we can define 5G mobile communication technology. Here, 5G mobile communication technology can be defined to include not only NR systems but also all existing LTE-A (Long Term Evolution-Advanced) systems. In other words, 5G communication can be a technology that operates considering backward compatibility with previous systems as well as the newly defined NR system.

[0056] For example, the 5G sidelink field can encompass both sidelink technology in LTE systems and sidelink technology in NR systems. Here, the sidelink field can be essential for performance improvements through ultra-high reliability and ultra-low latency, as well as for integration into new and diverse services.

[0057] For the sake of clarity, the following describes the operation and related information for V2X based on the NR system. However, the features of the embodiments of this disclosure are not limited to any particular system, but can be similarly applied to other similarly implemented systems, and are not limited to the exemplary systems to which the embodiments of this disclosure apply.

[0058] Next, V2X can be vehicle-based communication. Here, the concept of a vehicle is evolving from a simple means of transportation to a new platform. For example, IT technology is incorporated into vehicles, and various V2X services are provided based on this. For example, services such as accident prevention, improvement of the traffic environment, autonomous driving, and remote driving are provided. For this reason, the need for the development and application of side-link related technologies in relation to V2X is increasing.

[0059] More specifically, in relation to existing communication technologies, communication from a base station to a terminal can be considered downlink, and communication from a terminal to a base station can be considered uplink. Communication between terminals may also be necessary, and communication from terminal to terminal can be considered sidelink. For example, in relation to V2X, communication between vehicles or between vehicles and other objects (such as pedestrian UEs (P-UEs) or terminal-type roadside units (UE-type RSUs), which are not base stations) can be considered sidelink. In other words, when performing vehicle-based communication, it is possible to exceed the limitations of communication between terminals and base stations and develop and apply sidelink technology.

[0060] Figures 1 to 3 show examples of V2X scenarios to which this disclosure may apply.

[0061] Figure 1 may represent a scenario where communication is performed based on a side link. Figure 2 may represent a V2X operation scenario using communication between a terminal (or vehicle) and a base station. Figure 3 may represent a scenario where V2X operation is performed using both a side link and communication with a base station.

[0062] For example, in a description of V2X, a terminal can be a vehicle. In a description of V2X, terminals and vehicles are collectively referred to as terminals. For example, a terminal can refer to a device that can communicate with sidelinks and base stations, and may include a vehicle for V2X.

[0063] Furthermore, in relation to V2X, D2D (Device to Device) can mean communication between terminals. ProSe can mean proximity services to terminals performing D2D communication. SL (sidelink) can mean a sidelink, and SCI (Sidelink Control Information) can mean control information related to the sidelink. PSSCH (Physical Sidelink Shared Channel) is a channel through which data is transmitted via the sidelink, and PSCCH (Physical Sidelink Control Channel) can be a channel through which control information is transmitted via the sidelink. PSBCH (Physical Sidelink Broadcast Channel) is a channel that transmits signals via the sidelink in a broadcast manner and can transmit system information. PSFICH (Physical Sidelink Feedback Indication Channel) is a sidelink feedback channel and can be used to indicate feedback information. SLSS (Sidelink Synchronization Signal) can be a synchronization signal for the sidelink, and PSSID (Physical Sidelink Synchronization Identity) can be ID information for sidelink synchronization. SA ID (Sidelink group destination identity) is ID information used to distinguish sidelink groups, N SL ID(Physical sidelink synchronization identity) can be ID information for sidelink synchronization. V2V can mean communication between vehicles, V2P can mean communication between vehicles and pedestrians, and V2I / N can mean communication between vehicles and infrastructure / networks.

[0064] SA, TB, TTI, and RB are terms used in the same way as in existing LTE. For example, in V2X communication, control information transmitted from one terminal to another may be SA. When used in sidelink communication, this control information may be SCI. Here, SCI can be transmitted through PSCCH. Alternatively, part of the SCI may be transmitted through PSCCH and other parts through PSSCH.

[0065] In V2X communication, the amount of data transmitted from one terminal to another can be configured in units of terabytes (TB). Sidelink data can be transmitted via PSSCH.

[0066] Next, the operating mode can be defined by a resource allocation scheme for control information and data transmission for V2X communication or direct link (e.g., D2D, ProSe, or SL) communication.

[0067] For example, base station resource scheduling mode can be a resource allocation mode in which a base station (e.g., gNodeB, eNodeB) or relay node schedules the resources that a terminal will use to transmit V2X (or direct link) control information and / or data. On the designated resources, the terminal can transmit V2X (or direct link) control information and / or data.

[0068] As a specific example, a base station or relay node can provide sidelink (or direct link) control information and / or scheduling information for resources used for data transmission to a sidelink (or direct link) transmission terminal via Downlink Control Information (DCI). This allows the sidelink (or direct link) transmission terminal to transmit sidelink (or direct link) control information and data to a sidelink (or direct link) receiving terminal, and the sidelink (or direct link) receiving terminal to receive sidelink (or direct link) data based on the sidelink (or direct link) control information.

[0069] Furthermore, the UE autonomous resource selection mode may be a resource allocation mode in which the terminal itself selects the resources it will use to transmit control information and data. The terminal's resource selection can be determined by the terminal's sensing or other means in a resource pool (i.e., a collection of resource candidates). The terminal can then transmit V2X (or direct link) control information and / or data over the selected resources.

[0070] As a concrete example, a sidelink (or direct link) transmission terminal can transmit sidelink (or direct link) control information and data to a sidelink (or direct link) receiving terminal using its selected resources, and the sidelink (or direct link) receiving terminal can receive sidelink (or direct link) data based on the sidelink (or direct link) control information.

[0071] The base station resource scheduling mode described above can be referred to as Mode 1 in sidelink (or direct link) communication for D2D and the like. The base station resource scheduling mode can also be referred to as Mode 3 in sidelink communication for V2X and the like. Furthermore, the terminal autonomous resource selection mode described above can be referred to as Mode 2 in sidelink (or direct link) communication for D2D and the like. Additionally, the terminal autonomous resource selection mode can be referred to as Mode 4 in sidelink communication for V2X and the like. However, this is merely one embodiment, and the scope of this disclosure is not limited to the names of resource allocation modes. That is, in resource allocation modes to which this disclosure is applicable, the same target and the same operation can be considered the same resource allocation mode even if the names are different.

[0072] For example, in NR V2X, the base station resource scheduling mode can be referred to as Mode 1, and the terminal autonomous resource selection mode can be referred to as Mode 2.

[0073] The embodiments of this disclosure will be described using V2X communication as a basis for explanation, but are not limited thereto. For example, the present invention can be similarly applied to direct link-based communications such as D2D and ProSe.

[0074] Furthermore, V2X may be a general term encompassing V2V, V2P, and V2I / N. Here, V2V, V2P, and V2I / N can be defined as shown in Table 1, but are not limited to these definitions. In other words, Table 1 below is merely an example and is not limited to it.

[0075] [Table 1]

[0076] Furthermore, V2X communication can include PC5-based communication, which is an interface for sidelink communication.

[0077] Table 2 and Figure 1 show possible scenarios supporting V2X operation based solely on the PC5 interface (or SL). Here, Figure 1(a) can represent V2V operation, (b) V2I operation, and (c) V2P operation. In other words, Figure 1 can represent a method of communication based on sidelinks, allowing communication without a base station.

[0078] [Table 2]

[0079] Table 3 and Figure 2 show possible scenarios supporting V2X operation based solely on the Uu interface (i.e., the interface between the UE and the base station). For example, Figure 2(a) can show V2V operation, (b) V2I operation, and (c) V2P operation. That is, V2X operation can be supported using communication between the terminal and the base station.

[0080] [Table 3]

[0081] Table 4 and Figure 3 may represent scenarios that support V2X operation using both the Uu interface and the PC5 interface (or SL). Here, Figure 3(a) may represent scenario 3A in Table 4, and Figure 3(b) may represent scenario 3B in Table 4.

[0082] Referring to Figure 3(a), a terminal can transmit a V2X message to another terminal via a sidelink. Any of the terminals that receive this can transmit a V2X message to the base station via an uplink. The base station receives the V2X message and can transmit a message based on it to other nearby terminals via a downlink. For example, the downlink can be done via a broadcast method.

[0083] Referring to Figure 3(b), a terminal transmits a V2X message to a base station via the uplink, and the base station can transmit it to at least one terminal or RSU. The terminal or RSU that receives the message can then transmit it to multiple surrounding terminals via the sidelink.

[0084] Both Figure 3(a) and Figure 3(b) can support V2X operation using all communication and side links between the base station and the terminal.

[0085] [Table 4]

[0086] As mentioned above, V2X communication may be conducted via a base station or directly between terminals. When conducted via a base station, LTE-based V2X communication can transmit and receive data through the Uu link, which is the communication interface between the LTE base station and the terminal. When using a side link for direct communication between terminals, LTE-based V2X communication can transmit and receive data through the PC5 link, which is the communication interface between LTE terminals.

[0087] For example, V2X communication can be performed in an NR system using communication between terminals and base stations, and sidelinks between terminals. However, there may be differences between the communication methods (uplink / downlink) between base stations and terminals in an NR system and the communication methods (uplink / downlink) between base stations and terminals in existing systems. For example, some features may be similar, and there may be parts that are modified based on the new NR system. Furthermore, there may also be differences between sidelinks in existing systems and sidelinks in an NR system. That is, considering the differences in communication between base stations and terminals mentioned above, there may also be parts of sidelinks that are modified in the new NR system.

[0088] Figure 4 shows an example of a service provided based on a side link to which this disclosure may apply.

[0089] Referring to Figure 4, V2X-related services or IoT (Internet of Things) services can be provided based on 5G sidelinks. Here, 5G sidelink may be a concept that includes both sidelinks based on existing LTE systems and sidelinks that consider NR systems. That is, 5G sidelink services may include services provided by considering one or more sidelinks applicable to each of the LTE and NR systems.

[0090] For example, referring to FIG. 4, in relation to V2X services, it is possible to provide platooning, automatic driving, advanced sensor, and remote driving services. Here, platooning can be a technology in which a plurality of vehicles dynamically form a group and operate similarly. Furthermore, automatic driving can be a technology for driving a vehicle based on full automation or semi-automation. Also, an advanced sensor can be a technology for collecting and exchanging data obtained from sensors and video images. Furthermore, remote driving can be a technology related to the technology and applications for remote control of a vehicle. That is, the services described above can be provided as V2X-based services. However, these services are merely examples, and the services applicable to the present disclosure are not limited to the specific services described above. Here, in order to provide various V2X services, requirements such as ultra-low latency, ultra-connection, low power, and high reliability may be necessary. Therefore, in 5G side links, an operation method for satisfying V2X services and their requirements may be necessary, and the examples of the present disclosure will be described below in consideration of these requirements.

[0091] Hereinafter, the physical resource structure of the NR system will be described.

[0092] FIG. 5 is a diagram for explaining an NR frame structure to which the present disclosure can be applied.

[0093] The basic unit of the time domain in NR is T c = 1 / (Δf max ·N f ) and can be, where Δf max = 480·10 3 and N f = 4096. On the other hand, the basic unit of the time domain in LTE is Ts = 1 / (Δf ref ·N f,ref ) and can be, where Δf ref = 15·10 3 and N f,refIt can be 2048. The constant for the multiple relationship between the base unit of NR time and the base unit of LTE time is κ = T s / T c It can be defined as =64.

[0094] Referring to Figure 5, the time structure of the frame for downlink / uplink (DL / UL) transmission is T f =(Δf max ·N f / 100)·T s It can have = 10ms. Here, one frame is T sf =(Δf max ·N f / 1000)·T s It consists of 10 subframes, each corresponding to 1ms of time. The number of consecutive OFDM symbols in each subframe is N. subframe,u symb =N slot symb ·N subframe,u slot This is possible. Also, each frame can be divided into two half-frames of the same size, with half-frame 1 consisting of subframes 0-4 and half-frame 2 consisting of subframes 5-9.

[0095] Referring to Figure 5, N TA This indicates the timing advance (TA) between the downlink (DL) and uplink (UL). Here, the transmission timing of the uplink transmission frame i is determined based on the downlink reception timing at the terminal, according to the following equation [Equation 1].

[0096]

number

[0097] In [Mathematics 1], N TA,offset This can be a TA offset value that arises due to differences in duplex modes, etc. Basically, in FDD (Frequency Division Duplex), NTA、offset While it has a value of 0, TDD (Time Division Duplex) takes into account the margin for DL-UL switching time, resulting in N TA,offset It can be defined as a fixed value.

[0098] Figure 6 shows an NR resource structure to which this disclosure may apply.

[0099] Resource elements (REs) within a resource grid can be indexed by their respective subcarrier spacings. Here, one resource grid can be generated for each antenna port and for each subcarrier spacing. Uplink and downlink transmission and reception can be performed based on these resource grids.

[0100] On the frequency domain, one Resource Block (RB) consists of 12 REs, and for every 12 REs there is one index (n) for the RB. PRB ) can be constructed. An index for RB can be used within a specific frequency band or system bandwidth. An index for RB can be defined as shown in [Equation 2] below. Here, N RB sc represents the number of subcarriers per RB, and k represents the subcarrier index.

[0101]

number

[0102] New MaloRadio can be configured in various ways to meet the diverse services and requirements of the NR system. For example, unlike existing LTE / LTE-A systems which support one subcarrier spacing (SCS), the NR system can support multiple SCSs.

[0103] A new pneumatics for NR systems, including support for multiple SCSs, can operate in frequency ranges or carriers such as below 3 GHz, 3 GHz to 6 GHz, and 6 GHz to 52.6 GHz, in order to solve the problem of not being able to use wide bandwidths in existing frequency ranges or carriers such as 700 MHz or 2 GHz. However, the scope of this disclosure is not limited thereto.

[0104] Table 5 below shows examples of pneumatic radiographs supported by the NR system.

[0105] [Table 5]

[0106] Referring to Table 5, the neumaloraji can be defined based on the subcarrier spacing (SCS), CP (Cyclic Prefix) length, and number of OFDM symbols per slot used in the OFDM (Orthogonal Frequency Division Multiplexing) system. The aforementioned values ​​can be provided to the terminal for the downlink through the higher-level parameters DL-BWP-mu and DL-BWP-cp, and for the uplink through the higher-level parameters UL-BWP-mu and UL-BWP-cp.

[0107] For example, in Table 5, if the subcarrier spacing setting index (u) is 2, the subcarrier spacing (Δf) is 60 kHz, and both normal CP and extended CP can be applied. For other Pneumalorazinex systems, only normal CP can be applied.

[0108] A normal slot can be defined as the basic unit of time used to transmit one piece of data and control information in an NR system. The length of a normal slot can be set to basically 14 OFDM symbols. Furthermore, unlike slots, a subframe has an absolute time length corresponding to 1 ms in an NR system and can be used as a reference time for the length of other time intervals. Here, for coexistence or backward compatibility between LTE and NR systems, time intervals like LTE subframes may be required in the NR standard.

[0109] For example, in LTE, data may be transmitted based on a unit of time called TTI (Transmission Time Interval), and the TTI can be set to one or more subframe units. Here, in LTE, one subframe can be set to 1 ms and can contain 14 OFDM symbols (or 12 OFDM symbols).

[0110] Furthermore, non-slots can be defined in NR. A non-slot can mean a slot with a number of symbols that is at least one less than a normal slot. For example, when providing low latency, such as in a URLLC service, latency can be reduced through a non-slot with a smaller number of symbols than a normal slot. Here, the number of OFDM symbols included in a non-slot can be determined considering the frequency range. For example, in the frequency range of 6 GHz and above, a non-slot with a length of 1 OFDM symbol can be considered. As an additional example, the number of OFDM symbols that defines a non-slot can include at least 2 OFDM symbols. Here, the range of the number of OFDM symbols included in a non-slot can be set as the length of a mini-slot up to a predetermined length (e.g., normal slot length - 1). However, the number of OFDM symbols in a non-slot standard may be limited to 2, 4, or 7 symbols, but is not limited to these.

[0111] Furthermore, for example, in unlicensed bands below 6 GHz, subcarrier spacings corresponding to u 1 and 2 can be used, while in unlicensed bands above 6 GHz, subcarrier spacings corresponding to u 3 and 4 can be used. For example, when u is 4, it can be used for SSB (Synchronization Signal Block).

[0112] [Table 6]

[0113] Table 6 shows the number of OFDM symbols per slot (N) for normal CP, categorized by subcarrier spacing setting (u). slot symb ), number of slots per frame (N frame,u slot ), number of slots per subframe (N subframe,u slot Table 6 shows the values ​​mentioned above based on a normal slot with 14 OFDM symbols.

[0114] [Table 7]

[0115] Table 7 shows the number of slots per frame and per subframe, based on a normal slot with 12 OFDM symbols per slot, when extended CP is applied (i.e., when u is 2 and the subcarrier spacing is 60 kHz).

[0116] Furthermore, as mentioned above, one subframe can correspond to 1 ms on the time axis. In addition, one slot can correspond to 14 symbols on the time axis. For example, one slot can correspond to 7 symbols on the time axis. This allows for different numbers of slots and symbols to be considered within the 10 ms that make up one wireless frame. Table 8 shows the number of slots and symbols for each SCS. The 480 kHz SCS does not need to be considered in Table 8, but it is not limited to these examples.

[0117] [Table 8]

[0118] Figures 7 and 8 show examples of V2X resource pool configurations to which this disclosure may apply.

[0119] Referring to Figures 7 and 8, the configuration method for resource pools in V2X for the control channel (PSCCH) through which the SA (Scheduling Assignment) is transmitted and the data channel (PSSCH) through which the associated data is transmitted will be described. Here, a resource pool can be a collection of candidate resources available for the transmission of SA and / or data. Each resource pool may be called a slot pool in the time domain and a resource block pool in the frequency domain. Here, the resource pools illustrated in Figures 7 and 8 may be resource pools for the V (Vehicle)-UE in V2X. Furthermore, the resource pool configuration method illustrated in Figures 7 and 8 is just one example, and resource pools can be configured in other ways.

[0120] Resource pools like those illustrated in Figures 7 and 8 can be defined in terminal autonomous resource selection mode (or mode 2).

[0121] On the other hand, in base station resource scheduling mode (or mode 1), all sidelink slots in the time domain (for example, corresponding to all uplink slots in NR) and all resource blocks RB within a V2X carrier or band in the frequency domain may be a set of resource candidates available for SA and / or data transmission. Furthermore, in base station resource scheduling mode (or mode 1), a resource pool can be defined separately, similar to terminal autonomous resource selection mode (or mode 2), to set the set of resource candidates available for SA and / or data transmission.

[0122] In other words, the resource pools relating to this disclosure, as described with reference to Figures 7 and 8, can be defined in terminal autonomous resource selection mode (or mode 2) and / or base station resource scheduling mode (or mode 1).

[0123] The following section provides a detailed explanation of slot pools, which are equivalent to resource pools in the time domain.

[0124] Regarding the aforementioned resource pool, Figure 7 shows the slots in the time domain where the resource pool is configured. As shown in Figure 7, the slots for the V2X resource pool can be defined by specifying a bitmap that repeats for all slots except a specific slot. The slots for the V2X resource pool may be slots in which SA and / or data transmission and / or reception are permitted for the resource pool in V2X.

[0125] Here, slots excluded from bitmap repeat application may include slots used for transmitting Sidelink Signal Blocks (SSB), including PSSS (Primary Sidelink Synchronization Signal), SSSS (Secondary Sidelink Synchronization Signal), and PSBCH (Physical Sidelink Broadcast Channel). Furthermore, the excluded slots may further include downlink (DL) slots and flexible slots that are not uplink (UL) slots and can be used as sidelink (SL) slots in TDD. Here, the excluded slots are not limited to the examples given above.

[0126] For example, the slots excluded within an SFN (System Frame Number) or DFN (D2D Frame Number) period may include d non-uplink slots and slots for SSB. Furthermore, the excluded slots may have a length L within an SFN or DFN period. bitmap The bitmap may further include d' slots to be excluded in order to be applied repeatedly in integer multiples, where the excluded slots are not limited to the examples given above.

[0127] Furthermore, the repeatedly applied bitmap can be indicated by higher-layer signaling such as RRC (the "slot indication of resource pool" signaling field shown in Figure 7). If the bitmap value is 1, it indicates a slot for a resource pool, and if it is 0, it indicates a slot that does not belong to a resource pool. Here, the u value in Figure 7 is a value determined by SCS (Subcarrier Spacing) and can follow the values ​​defined in Tables 5 to 7.

[0128] Next, we will specifically explain resource block pools, which correspond to resource pools in the frequency domain.

[0129] Regarding the aforementioned resource pool, Figure 8 shows the slots in the frequency domain where the resource pool is configured. As shown in Figure 8, within the resource pool, the PSCCH that transmits SA and the PSSCH that transmits data can be transmitted simultaneously within a single sub-channel, and the PSSCH can be transmitted across the entire sub-channel. In contrast, the PSCCH can be transmitted within a portion of the sub-channel.

[0130] As shown in Figure 8, in the slots where the resource pool is configured on the time domain for V2X, all RB(RB#0 to RB#(N) on the frequency domain are included. UL RB -1)) For each RB, we can define "Starting RB of sub-channels" (where N UL RB This is the total number of RBs corresponding to the system bandwidth for uplink (UL), and since V2X for sidelinks is defined in the UL band, UL is replaced by SL (i.e., N UL RB N instead SL RB It is also possible to apply the above. The "Starting RB of sub-channels" signaling field can be indicated by higher-layer signaling such as RRC. From the RBs indicated by such "Starting RB of sub-channels", a total of K consecutive RBs corresponding to sub-channels will belong to the resource pool. Here, the number of RBs that make up one sub-channel is indicated by the "Sub-channel size" signaling field, and the number of the K sub-channels is indicated by the "Number of sub-channels" signaling field, which can be indicated through higher-layer signaling such as RRC.

[0131] For example, "Sub-channel size" N subchannel The number of RBs can be 10, 15, 20, 25, 50, 75, or 100, but is not limited to these; 4, 5, or 6 RBs can also be used. As shown in Figure 8, the PSCCH for SA allocated to a portion of a subchannel can be allocated to X RBs within the subchannel, where X ≤ N. subchannel That is the case.

[0132] The positioning technology applied below is based on LTE (Long Term Evolution) and has been further improved using NR (New Radio) wireless technology. For commercial use, it includes technology to achieve an error of up to 3m indoors and up to 10m outdoors for 80% of users within coverage. To this end, various technologies are being considered for downlink and / or uplink, including time-based and angle-based technologies.

[0133] Downlink-based methods include the DL-TDOA (Time Difference of Arrival) method, which is time-based, and the DL-AoD (Angle of Departure) method, which is angle-based. For example, when estimating the terminal's position based on DL-TDOA, the difference in arrival times of signals transmitted at different transmission points is calculated, and the terminal's position can be estimated using the arrival time difference value and the position information of each transmission point. Also, as an example, when estimating the terminal's position based on DL-AoD, the angle of departure of the signal transmitted to the terminal is checked, and the direction in which the signal is transmitted is determined based on the position of the transmission point, and the terminal's position can be estimated.

[0134] Furthermore, uplink-based methods include the UL-TDOA (Time Difference of Arrival) method, which is based on time, and the DL-AoA (Angle of Arrival) method, which is based on angle. For example, when estimating the position of a terminal based on UL-TDOA, the time difference between the arrival of the signal transmitted from the terminal to each transmission point is calculated, and the position of the terminal can be estimated using the arrival time difference value and the position information of each transmission point. Also, as an example, when estimating the position of a terminal based on DL-AoA, the angle of arrival of the signal transmitted from the terminal is checked, and the direction in which the signal is transmitted is checked based on the position of the transmission point, and the position of the terminal can be estimated.

[0135] Furthermore, downlink and uplink-based methods include the multi-cell RTT (Round-Trip Time) method, the RTT method between one or more adjacent gNodeBs and / or TRPs (Transmission Reception Points) for NR downlink and uplink positioning, and the E-CID (Enhanced Cell ID) method. For example, when estimating the terminal's position using multi-cell RTT, it may be possible to estimate the terminal's position by measuring the time (i.e., RTT) after signals have been transmitted through multiple cells and responses have been received, and then using the position information of multiple cells. Alternatively, it may be possible to estimate the terminal's position by confirming the RTT signal from the gNodeB and / or TRP. When estimating the terminal's position based on E-CID, it may be possible to estimate the terminal's position through cell position information after confirming the cell ID by measuring the angle of arrival and received signal strength.

[0136] To realize the aforementioned technologies, the LTE downlink-based PRS (Positioning Reference Signal) is being newly discussed as "DL PRS," which is modified according to the structure of the NR downlink. Additionally, for uplinks, the NR-based uplink reference signal SRS (Sounding Reference Signal), which takes MIMO and other factors into consideration, has evolved into "SRS for positioning," an improved reference signal that also takes positioning into account.

[0137] Furthermore, to provide improved solutions related to positioning operations, additional requirements for high accuracy, low latency, network efficiency (e.g., scalability, RS overhead, etc.), and terminal efficiency (e.g., power consumption, complexity, etc.) for horizontal and vertical position measurement are taken into consideration.

[0138] For example, positioning operations can be designed to have high accuracy in consideration of IIoT scenarios. To this end, downlink / uplink (DL / UL) position reference signals, signaling / procedures for improved accuracy, reduced latency, and methods to improve network and terminal efficiency can be considered.

[0139] This has led to efforts to improve the performance of NR-based positioning technology for higher accuracy, lower latency, and network / terminal efficiency in commercial use cases such as IoT devices for smart homes and wearables, as well as in Industrial IoT (Inter of Things) use cases such as IoT devices in smart factories.

[0140] In this regard, we aim to further improve accuracy by reducing the error to within 1 meter for commercial use cases and within 0.2 meters for IIoT use cases, while also shortening the latency from the existing 100ms to within 10ms.

[0141] Here, an IIoT scenario considering indoor factory devices can be as shown in Table 9 below. As an example, Table 10 below shows the settings for simulation considering an IIoT scenario. Specifically, in Table 10, you can set the hall size, base station locations, and room height considering an IIoT scenario such as a smart factory, and then verify the base station's transmission and reception operation based on these settings. However, this is just an example and is not limited to the settings described above.

[0142] Specifically, IIoT scenarios can consider cases where the internal environment has dense clusters (clutter) and cases where it does not (sparse). In other words, they can be distinguished by the presence or absence of clusters in the internal environment. Furthermore, IIoT scenarios can consider cases where the antenna height is higher or lower than the average cluster height. That is, considering the above cases, IIoT scenarios can be as shown in Table 9 below.

[0143] In other words, InF-SL is a scenario that considers the case where clusters are not densely packed in an indoor factory environment such as a smart factory, and both the transmitting and receiving antennas of the base stations are lower than the average antenna height of the cluster. InF-DL is a scenario that considers the case where clusters are densely packed in an indoor factory environment such as a smart factory, and both the transmitting and receiving antennas of the base stations are lower than the average antenna height of the cluster.

[0144] On the other hand, InF-SH is a scenario that considers the case where clusters are not densely packed in an indoor factory environment such as a smart factory, and the base station's transmission or reception antenna is higher than the average antenna height of the cluster. InF-DH is a scenario that considers the case where clusters are densely packed in an indoor factory environment such as a smart factory, and the base station's transmitting and receiving antenna is higher than the average antenna height of the cluster.

[0145] Additionally, InF-HH is a scenario that considers the case where both the transmitting and receiving antennas of a base station are higher than the average antenna height of the cluster, regardless of whether or not there is cluster density in an indoor factory environment such as a smart factory.

[0146] Here, a cluster refers to a configuration in which base stations are arranged intensively at regular intervals within a given space. As an example, a cluster can be realized in an internal environment with 18 base stations as shown in Table 10, but this is just one example and is not limited to this.

[0147] Furthermore, as mentioned above, the reason for considering factors such as cluster density and antenna height between base stations and clusters in the scenario is that these factors change the characteristics and interference of radio waves, which may slightly alter the positioning techniques required to meet various performance requirements for positioning (accuracy, latency, network / terminal efficiency, etc.).

[0148] However, in actual application, a common positioning technique that can cover all the requirements in the five scenarios described above can be applied, and the positioning technique referred to below in this invention is also applicable to all five scenarios. That is, it is possible to apply the positioning technique described below to all IIoT devices operating on an NR basis in indoor factory environments such as smart factories to perform positioning.

[0149] [Table 9]

[0150] [Table 10]

[0151] The following describes how to generate a Positioning Rating (PRS) considering the positioning requirements that arise from the aforementioned IIoT scenarios and new applications.

[0152] Figure 9 shows a method for performing position measurement based on OTDOA (Observed Time Difference Of Arrival) to which this disclosure may apply.

[0153] OTDOA can be a method for determining location by tracking signals transmitted to a ground station via a communications satellite in LTE and / or NR systems. That is, OTDOA is based on measuring the time difference in arrival of radio signals transmitted at various locations. For example, multiple cells can transmit a reference signal (RS), which a terminal can receive. Because the distance between each of the multiple cells and the terminal's location is different, the arrival times of the reference signals transmitted from each of the multiple cells to the terminal may also differ. Here, the terminal can calculate the time difference for the signals received from each cell and transmit this calculated information to the network. The network can combine the time difference with the antenna position information of each cell to calculate the terminal's location. Here, at least three cells can be used to determine the terminal's location.

[0154] As an example, the difference in the time at which a terminal receives a reference signal from each of a pair of base stations (gNodeBs / eNodeBs) is defined as the Reference Signal Time Difference (RSTD). Here, position measurement using RSTD can be performed based on the downlink signal. The terminal can estimate its position based on the TDOA (Time Difference Of Arrival) measurement of a special reference signal received from the other base station (gNodeBs / eNodeBs).

[0155] Figure 10 shows the configuration of the control plane and user plane for NRPP (NR positioning protocol) related to the present invention to which this disclosure may apply. As an example, the positioning technology can be defined as at least one of E-CID (Enhanced Cell ID), OTDOA (Observed Time Difference of Arrival), and A-GNSS (Global Navigation Satellite System). In this case, the aforementioned positioning technology can simultaneously support positioning solutions for both the control plane and the user plane. LTE and / or NR network-based positioning functions can be primarily controlled by an LMF (Location Management Function). Here, control plane positioning and user plane positioning can be performed through the LMF. The LMF is controlled at the network end and can be coordinated with base stations and mobility entities (e.g., AMF (Access and Mobility Management Function)). As an example, the LMF may correspond to a location server described later in this disclosure.

[0156] Another example is that LTE and / or NR network-based positioning functionality can also be primarily controlled by an E-SMLC (Evolved-Serving Mobile Location Centre) / SLP (Secure User Plane Location) SUPL (Location Platform) based on the LPP (LTE positioning protocol). Here, positioning can be performed in the control plane via the E-SMLC and in the user plane via the SLP, each controlled at the network end and coordinated through base stations and mobility entities (e.g., MMEs (Mobility Management Entities)).

[0157] For example, in an LTE system, positioning is performed either by estimating the position based on the downlink based on the time difference, or by estimating the position based on the cell ID. In an NR system, positioning can be performed considering downlink-based positioning (e.g., PRS) and uplink-based positioning (e.g., SRS for positioning). Furthermore, the positioning can be performed based on the round trip time (RTT) for signal exchange time to multiple cells, or based on the cell ID. In addition, the positioning can be performed based on the signal reception time difference. Note that in newer communication systems, communication is based on beams, so positioning can be performed based on the angle difference of each beam. Based on the above, the downlink / uplink reference signals and terminal / base station operations may be as shown in Tables 11 and 12 below.

[0158] [Table 11]

[0159] [Table 12]

[0160] Here, the terms in Tables 11 and 12 may be as follows:

[0161] RSTD (Reference Signal Time Difference)

[0162] RSRP (Reference Signal Received Power)

[0163] RTOA (Relative Time Of Arrival)

[0164] RSRQ (Reference Signal Received Quality)

[0165] RSRPB (Reference Signal Received Power per Branch)

[0166] RRM (Radio Resource Management)

[0167] CSI-RS (Channel State Information Reference Signal)

[0168] Here, RSTD can be the transmission time difference of the reference signal, and RTOA can be the relative time value when the signal arrives. Positioning can be performed based on the position information of the transmission point by calculating the relative time difference value based on the position and transmission time difference of the transmission point that transmitted the reference signal. RSRP is the strength of the received reference signal, and RSRPB is the strength of the reference signal measured at each branch. RSRQ is the quality of the received reference signal. By checking the strength and quality of the reference signal received through RSRP and RSRQ, it is possible to confirm whether positioning operation is possible. In addition, RRM can perform resource management and check the resources available for positioning.

[0169] Therefore, positioning in the new communication system can be performed based on at least one of the following: downlink / uplink, time difference / angle difference, RTT, and cell ID. Considering the downlink PRS (DL PRS) for positioning, a single base station (or transmission reception point, TRP) can have a DL PRS resource set. In this case, the DL PRS resource set can be a collection of DL PRS resources. Each DL PRS resource within the DL PRS resource set can have its own DL PRS resource ID. For example, in a new communication system (e.g., NR), each base station (or TRP) can communicate using multiple beams. In this case, each DL PRS resource ID can correspond to each beam transmitted by a single base station (or TRP). That is, each DL PRS resource within the DL PRS resource set can correspond to each beam.

[0170] Here, the DL PRS configuration can include the DL PRS transmission schedule. This means that the base station (or TRP) can instruct the terminal on the DL PRS configuration. Therefore, the terminal can verify the DL PRS based on the instructed DL PRS configuration without performing blind detection. The numerology for DL ​​PRS may be the same as the numerology for data transmission. For example, the CP length and subcarrier spacing (SCS) for DL ​​PRS may be the same as the CP length and SCS for data transmission.

[0171] Furthermore, DL PRS resource sets may be transmitted through the positioning frequency layer at one or more base stations (or TRPs). In this case, since DL PRS resource sets are transmitted through the same positioning frequency layer, the SCS, CP type, center frequency, point A, bandwidth, start PRB (Physical Resource Block), and Comb size can be set to be the same. Here, point A may be a value indicating the position of Resource Block 0 (RB 0). The DL PRS resource sets may be transmitted through the same frequency layer. Here, the DL PRS sequence may be a Gold sequence and a binary sequence. This may be identical to the DL PRS in existing systems. The DL PRS sequence ID may be 4096. This may be more than the sequence 1024 for cell IDs in NR. Also, the DL PRS may be modulated based on QPSK (Quadrature Phase Shift Keying) and transmitted based on the CP-OFDM (Cyclic-Prefix Orthogonal Frequency Division Multiplexing) scheme. Furthermore, DL PRS can be configured to have up to 12 symbols within a single slot as time-axis resources, and can support kombu sizes up to kombu-12.

[0172] More specific details may be as shown in Table 13 below. Specifically, the intervals at which PRS are allocated on the frequency axis based on the comb size may differ. In LTE systems, DL PRS can be transmitted using all symbols within a single slot. However, in the newer NR communication system, DL PRS may be transmitted based on different symbol counts, as shown in Table 13 below.

[0173] [Table 13]

[0174] The DL PRS transmission period can be set for each DL PRS resource set. For example, each base station (or TRP) can configure multiple DL PRS resource sets. Multiple DL PRS resource sets with different periods can exist within the same base station (or TRP), and the periods can be set in various ways.

[0175] The resources allocated for DL ​​PRS transmission (hereinafter referred to as DL PRS resources) can be repeated 1, 2, 4, 6, 8, 16, or 32 times. The interval between each repeated DL PRS resource can be set to one of 1, 2, 4, 8, 16, or 32 slots, but is not limited to the embodiments described above.

[0176] In relation to the frequency allocation for the DL PRS resource, the granularity of the DL PRS bandwidth can be 4PRB. The starting PRB can be specified as a parameter to the terminal, and the terminal can determine the starting PRB based on the specified parameter. As an example, the minimum bandwidth for DL ​​PRS may be 24 PRBs, and the maximum bandwidth may be 272 PRBs.

[0177] In relation to DL PRS, a Resource Element (RE) offset can be set on the frequency axis. In this case, the RE offset can be set to have a constant offset on the frequency axis based on the Kombu pattern, with respect to the first symbol of the DL PRS resource. The first symbol may be set at the terminal. The remaining symbols can then be determined based on the RE offset with respect to the first symbol.

[0178] Figure 11 shows a kombu pattern applicable to this disclosure.

[0179] Referring to Figure 11, the DL PRS RE pattern when the kelp size and the number of symbols are equal is shown, and this will be explained as an example.

[0180] More specifically, we can consider the case where the comb size is 2 (Comb-2), assigning to two symbols (0,1). In this case, the RE offset can be {0,1}. That is, DL PRS can be assigned to the first and second symbols with RE offset {0,1}, and the frequency axis can be assigned based on comb size 2. We can consider the case where the comb size is 4 (Comb-4), assigning to four symbols (0,1,2,3). In this case, the RE offset can be {0,2,1,3}. That is, DL PRS can be assigned to symbols 1 through 4 with RE offset {0,2,1,3}, and the frequency axis can be assigned based on comb size 4. We can consider the case where the comb size is 6 (Comb-6), assigning to six symbols (0,1,2,3,4,5). In this case, the RE offset can be {0,3,1,4,2,5}. That is, DL PRS can be assigned from the 1st to the 6th symbol by RE offset {0,3,1,4,2,5}, and the frequency axis can be assigned based on the comb size of 6.

[0181] The present invention can support DL PRS muting. When a terminal receives a command to mute a DL PRS, the terminal can mute that DL PRS. Here, a DL PRS muting bitmap can be set for a DL PRS resource set, and based on this, the terminal can be instructed to mute the DL PRS. In this case, each bit of the DL PRS muting bitmap (hereinafter referred to as the Option 1 bitmap) can correspond to each occasion or consecutive instances within the DL PRS resource set. In this case, if a particular bit instructs muting, all DL PRS within the occasion or consecutive instances corresponding to that particular bit can be muted.

[0182] Furthermore, the bitmap that instructs muting (hereinafter referred to as the Option 2 bitmap) can instruct muting for each DL PRS resource within an occasion or instance for one period. Each bit of the bitmap can correspond to the repetition index of each DL PRS resource within an occasion or instance for one period. That is, each bit can correspond to one repetition of DL PRS within each DL PRS period, and each bit can instruct muting. As an example, the bitmap can be set to 2, 4, 8, 16, or 32 bits.

[0183] In relation to the aforementioned muting option, at least one of the Option 1 bitmap and the Option 2 bitmap can be set. For example, only the Option 1 bitmap can be set. Also, for example, only the Option 2 bitmap can be set. Furthermore, for example, both the Option 1 bitmap and the Option 2 bitmap can be set. In this case, if both the Option 1 bitmap and the Option 2 bitmap are set, all DL PRS resources in occasions where muting is instructed based on Option 1 will be muted, and DL PRS resources in occasions where muting is not instructed by the Option 1 bitmap but are muted by the Option 2 bitmap can be muted.

[0184] In a new communication system (e.g., NR), DL PRS can be generated to perform position measurement. Referring to Table 13 mentioned earlier, there can be 12 fully orthogonal resources within a single slot. When assigning DL PRS to two symbols with a comb size of 2 (comb-2), there are 2 orthogonal resources, which can be further divided into 6 based on the symbol offset. Similarly, when assigning DL PRS to two symbols with a comb size of 4 (comb-4), there are 4 orthogonal resources, which can be further divided into 3 based on the symbol offset. And when assigning DL PRS to 6 symbols with a comb size of 6 (comb-6), there are 6 orthogonal resources, which can be further divided into 2 based on the symbol offset. Furthermore, if the comb size is 12 (comb-12) and DL PRS is assigned to 12 symbols, there are 12 orthogonal resources, and only one can be separated based on the symbol offset.

[0185] In relation to the aforementioned DL PRS, the new communication system can support up to 64 TRPs in a single frequency layer, and 64 resources can be allocated to each TRP. Taking this into consideration, the DL PRS ID could be 4096 (64*64).

[0186] As an example, assuming the terminal operates based on an IIoT scenario in a 120kHz bandwidth, considering the scenarios in Tables 9 and 10 mentioned above, it can support 18 TRPs. In this case, considering that 64 beams are supported per TRP, each of the 64 resources can be supported for DL ​​PRS. Therefore, the total resources required may be 1152 (18 * 64). Here, a fully orthogonal resource in one slot is 12 symbol invars. Thus, considering 1152 resources, 96 (1152 / 12 = 96) slots may be required. In this case, 96 slots may correspond to 12ms at 120kHz.

[0187] On the other hand, positioning-related delay requirements can be set to 10ms or less, as mentioned above, when considering IIoT scenarios. Therefore, if the aforementioned 12ms slots (96 slots) are used, there is a risk that the delay requirement (10ms) cannot be met. In other words, a method for efficiently allocating DL PRS resources may be necessary.

[0188] Figures 12 and 13 show a method for performing cyclic preposition based on DL PRS assignment patterns applicable to this disclosure. The DL PRS assignment patterns may lose their orthogonality due to collisions when performing both frequency-axis and time-axis cyclic preposition. Therefore, when performing cyclic preposition based on DL PRS assignment patterns, only frequency-axis cyclic preposition may be possible.

[0189] Referring to Figure 12, in the case of a comb size of 6, if the pattern for assigning DL PRS to six symbols is {0.3, 1, 4, 2, 5}, then six patterns may be possible with frequency axis cyclic preamps. Figure 12 may show resource allocation methods when f=0 and when f=2.

[0190] Referring to Figure 13, if the comb size is 12 and the pattern for assigning DL PRS to 12 symbols is {0,6,3,9,1,7,4,10,2,8,5,11}, then 12 patterns may be possible with frequency axis cyclic pre-input. Figure 7 may show resource allocation methods when f=0 and f=2.

[0191] Figure 14 shows a DL PRS resource allocation method applicable to this disclosure.

[0192] The communication system according to the present invention can support DL PRS muting. When a terminal receives an instruction to mute a DL PRS, the terminal can mute the DL PRS. Here, a DL PRS muting bitmap can be set for a DL PRS resource set, and based on this, the terminal can be instructed to mute the DL PRS. At this time, each bit of the DL PRS muting bitmap (hereinafter referred to as the Option 1 bitmap) can correspond to each occasion or consecutive instances within the DL PRS resource set. Here, each DL PRS occasion can correspond to the entire DL PRS resource (including repeated transmissions) within each DL PRS cycle. That is, one DL PRS occasion can correspond to one DL PRS cycle.

[0193] In this case, if a specific bit indicates muting, all DL PRS within the occasion or consecutive instances corresponding to that specific bit can be muted. As an example, the DL PRS of the existing system (LTE) can also be muted on an occasion-by-occasion basis, as mentioned above. As another example, the bitmap that indicates muting (hereinafter referred to as the Option 2 bitmap) can indicate muting for each DL PRS resource within an occasion or instance for one period. Here, each bit of the bitmap can correspond to the repetition index of each DL PRS resource within an occasion or instance for one period (i.e., each bit corresponds to one repetition of DL PRS within each DL PRS period), and each bit can indicate muting. In this case, the bitmap can be set to 2, 4, 8, 16, or 32 bits.

[0194] For example, in relation to the muting option, at least one of the Option 1 bitmap and Option 2 bitmap can be set. For example, only the Option 1 bitmap can be set. Furthermore, only the Option 2 bitmap can be set. For example, both the Option 1 bitmap and Option 2 bitmap can be set. In this case, if both the Option 1 bitmap and Option 2 bitmap are set, all DL PRS resources in occasions where muting is instructed based on Option 1 will be muted, and DL PRS resources in occasions where muting is not instructed but muting is instructed by the Option 2 bitmap will be muted.

[0195] Referring to Figure 14(a), the terminal can check the DL PRS period and offset instructed based on the DL PRS settings. In Figure 14(a), the period is set in 10 slots and the offset is set in 2 slots, but this is just an example and is not limited to the embodiments described above. The terminal can also check the repetition pattern of DL PRS resources within the period through "DL-PRS-ResourceRepetitionFactor" instructed based on the DL PRS settings. Note that "DL-PRS-ResourceRepetitionFactor" is set to instruct repetition twice, but this is just an example and is not limited to the embodiments described above. The terminal can check the time interval between DL PRS resources within one period through "DL-PRS-ResourceTimeGap" instructed based on the DL PRS settings. For example, in Figure 14(a), "DL-PRS-ResourceTimeGap" is set in one slot, but this is just an example and is not limited to the embodiments described above.

[0196] Referring to Figure 14(b), the terminal can perform muting based on the Option 1 bitmap. For example, the Option 1 bitmap may be a 2-bit muting bitmap for two periods, where each bit corresponds to one occasion corresponding to one period. In this case, muting can be performed for the corresponding occasion based on each bit. Furthermore, for example, in the Option 2 bitmap, each DL PRS repetition within one period can correspond to each bit.

[0197] If the terminal is instructed to mute based on the Option 1 bitmap, the terminal recognizes that all DL PRS for that occasion have been muted and can perform positioning. On the other hand, in the case of the Option 2 bitmap, the terminal can mute DL PRS that have been instructed to be muted through the Option 2 bitmap, even if the terminal has not been instructed to mute based on the Option 1 bitmap. In other words, the terminal can perform positioning only for DL ​​PRS resources that have been instructed not to be muted using both the Option 1 bitmap and the Option 2 bitmap. As a specific embodiment, each of the DL PRS occasions 1410-1, 1410-2, 1410-3, and 1410-4 in Figure 14(b) can correspond to their respective PRS periods. Here, the first DL PRS occasion 1410-1 corresponds to "period #0", the second DL PRS occasion 1410-2 corresponds to "period #1", the third DL PRS occasion 1410-3 corresponds to "period #2", and the fourth DL PRS occasion 1410-4 corresponds to "period #3".

[0198] Since each bit in the Option 1 bitmap corresponds to a DL PRS occasion, the Option 1 bitmap can be 2 bits long. Here, of the 2 bits in the Option 1 bitmap corresponding to the first DL PRS occasion 1410-1 and the second DL PRS occasion 1410-2, if the bit corresponding to the first DL PRS occasion 1410-1 indicates muting, then all DL PRS resources 1420-1 and 1420-2 within the first DL PRS occasion 1410-1 are muted. Also, if the bit corresponding to the second DL PRS occasion 1410-2 of the 2 bits in the Option 1 bitmap indicates muting, then all DL PRS resources 1420-3 and 1420-4 within the second DL PRS occasion 1410-2 are muted.

[0199] On the other hand, if the bit corresponding to the third DL PRS occasion 1410-3 in the 2-bit option 1 bitmap corresponding to the third DL PRS occasion 1410-3 indicates muting, then DL PRS resources 1420-5 and 1420-6 within the third DL PRS occasion 1410-3 are all muted. Also, if the bit corresponding to the fourth DL PRS occasion 1410-4 in the same 2-bit option 1 bitmap indicates muting, then DL PRS resources 1420-7 and 1420-8 within the fourth DL PRS occasion 1410-4 are all muted.

[0200] Furthermore, each DL PRS occasion 1410-1, 1410-2, 1410-3, and 1410-4 may contain repetitions of the DL PRS resource. For example, the first DL PRS occasion 1410-1 contains two repetitions of the DL PRS resource 1420-1 and 1420-2. The second DL PRS occasion 1410-2 also contains two repetitions of the DL PRS resource 1420-3 and 1420-4. The third DL PRS occasion 1410-3 also contains two repetitions of the DL PRS resource 1420-5 and 1420-6, and the fourth DL PRS occasion 1410-4 also contains two repetitions of the DL PRS resource 1420-7 and 1420-8.

[0201] At this time, each bit of the Option 2 bitmap can correspond to each repetition of the DL PRS resource. Therefore, within the first DL PRS occasion 1410-1, the Option 2 bitmap is set to 2 bits by two repetitions of the DL PRS resource 1420-1 and 1420-2.

[0202] Here, if the Option 1 bitmap indicates that the first DL PRS occasion 1410-1 should be muted, the two repetitions of the DL PRS resource 1420-1 and 1420-2 will be muted independently of the Option 2 bitmap. Conversely, if the Option 1 bitmap indicates that the first DL PRS occasion 1410-1 should not be muted, the two repetitions of the DL PRS resource 1420-1 and 1420-2 will be muted according to the Option 2 bitmap. Here, if the bit in the 2-bit Option 2 bitmap corresponding to the first repetition 1420-1 of the DL PRS resource indicates muting, then the DL PRS resource 1420-1 will be muted. Furthermore, if the bit in the 2-bit Option 2 bitmap corresponding to the second repetition 1420-2 of the DL PRS resource indicates muting, then the DL PRS resource 1420-2 will be muted. The Option 2 bitmap can be applied when the Option 1 bitmap indicates that no muting is performed.

[0203] As an example, a method and apparatus for performing positioning using sidelink in a new communication system (e.g., NR) can be provided. For example, a terminal performing sidelink communication can perform sidelink communication based on at least one of in-coverage, out-of-coverage, and partial coverage. Furthermore, as an example, sidelink communication can support V2X (vehicle to everything), public safety, commercial service, and IIoT (Industrial Internet of Things), as mentioned above.

[0204] Furthermore, as an example, side-link-based positioning can be performed. In this case, positioning can be performed based on at least one of TDOA (time difference of arrival), RTT (round trip time), AOA (angle of arrival), AOD (angle of departure), and RSTD (reference signal time difference), but is not limited to these. Another example is that measurements for side-link positioning can be used in combination with other RAT-based positioning measurements (e.g., Uu-based measurement), and is not limited to any particular embodiment.

[0205] Furthermore, as an example, when performing sidelink positioning based on a new system, it is necessary to determine signal design, resource allocation, measurement, related procedures, and other matters from the perspective of the physical layer for the reference signal for sidelink positioning, which will be discussed later. Furthermore, as an example, it is possible to recycle existing reference signals and procedures related to reference signals for sidelink positioning, which will be discussed later. The following describes how to perform sidelink-based positioning based on the above.

[0206] Figure 15 shows a method for performing side-link-based positioning applicable to this disclosure.

[0207] Referring to Figure 15, sidelink-based positioning can be performed. As a specific example, in Figure 15, terminals A1520, B1530, and C1540 may be within the coverage of base station 1510. For example, each of terminals A1520, B1530, and C1540 may be in an RRC-connected state with base station 1510, but is not limited to this. In this case, the position of terminal D1550 can be measured based on sidelink-based positioning.

[0208] Here, as an example, sidelink communication may be possible between terminal A1520 and terminal D1550, between terminal B1530 and terminal D1550, and between terminal C1540 and terminal D1550. Another example is that terminals A1520, B1530, C1540, and D1550 can perform group communication-based sidelink communication based on group cast. For example, terminal A1520 may be the master terminal in a group communication, but is not limited to the embodiments described above.

[0209] For the sake of clarity, the following explanation will be based on the aforementioned situation, but it is not limited to this example. Referring to Figure 15, base station 1510 can transmit allocation information A to terminal A1520, allocation information B to terminal B1530, and allocation information C to terminal C1540. In this case, allocation information A may be information necessary for terminal A1520 to transmit sidelink positioning reference signal (SL PRS) A. For example, allocation information A may include at least one of the resource and sequence information necessary for terminal A1520 to transmit SL PRS A, but may also include other information. Allocation information B may be information necessary for terminal B1530 to transmit SL PRS B. Allocation information B may include at least one of the resource and sequence information necessary for terminal B1530 to transmit SL PRS B, but may also include other information. Allocation information C may be information necessary for terminal C1540 to transmit SL PRS C. The allocation information C may include at least one of the resource and sequence information necessary for terminal C1540 to transmit SL PRS C, but may also include other information.

[0210] In this case, for example, each of the allocation information A, allocation information B, and allocation information C may be transmitted from the base station 1510 to each of the terminals A1520, B1530, and C1540 by upper-layer signaling (e.g., RRC). Here, for example, each of the allocation information A, allocation information B, and allocation information C may be allocated by a location server, and the allocated information may be transmitted to each terminal through the base station 1510, and is not limited to a specific embodiment.

[0211] Subsequently, terminal A1520 can transmit allocation information A' to terminal D1550. Here, allocation information A' may be information necessary for terminal A1520 to transmit SL PRS A to terminal D1550. For example, allocation information A' may be the same information as allocation information A. That is, terminal A1520 can forward the allocation information received from base station 1510 to terminal D1550. Another example is that allocation information A' may be information generated by terminal A1520 based on the allocation information A received. In this case, for example, terminal A1520 can transmit allocation information A' to terminal D1550 through at least one of PSCCH (physical sidelink control channel) and PSSCH (physical sidelink shared channel).

[0212] Furthermore, terminal B1530 can transmit allocation information B' to terminal D1550. Here, allocation information B' may be information necessary for terminal B1530 to transmit SL PRS B to terminal D1550. For example, allocation information B' may be the same information as allocation information B. That is, terminal B1530 can forward the allocation information received from base station 1510 to terminal D1550. Another example is that allocation information B' may be information generated by terminal B1530 based on the allocation information B received. In this case, for example, terminal B1530 can transmit allocation information B' to terminal D1550 through at least one of PSCCH and PSSCH.

[0213] Furthermore, terminal C1540 can transmit allocation information C' to terminal D1550. Here, allocation information C' may be information necessary for terminal C1540 to transmit SL PRS C to terminal D1550. For example, allocation information C' may be the same information as allocation information C. That is, terminal C1540 can forward the allocation information received from base station 1510 to terminal D1550. Another example is that allocation information C' may be information generated by terminal C1540 based on the allocation information C received. That is, each terminal can transmit its own allocation information to terminal D1550. In this case, for example, terminal B1530 can transmit allocation information B' to terminal D1550 through at least one of PSCCH and PSSCH.

[0214] Subsequently, terminal A1520 can transmit SL PRS A to terminal D1550. Similarly, terminal B1530 can transmit SL PRS B to terminal D1550. Furthermore, terminal C1540 can transmit SL PRS C to terminal D1550. In other words, each terminal can transmit its respective SL PRS to terminal D1550 based on its allocated resource information.

[0215] Subsequently, terminal D1550 can perform measurements based on SL PRS A, SL PRS B, and SL PRS C received from terminals A1520, B1530, and C1540, respectively. Terminal D1550 can transmit measurement information to terminal A1520. At this time, the measurement information may be a measured value based on at least one of OTDOA (observed time difference of arrival) and RSTD (reference signal time difference) corresponding to SL PRS A, SL PRS B, and SL PRS C, respectively. As an example, the measured value may be A, B, and C values ​​for terminals A1520, B1530, and C1540, respectively. If terminal D1550 has prior knowledge of the locations of terminals A1520, B1530, and C1540, terminal D1550 can derive its own location value through the aforementioned measured values ​​A, B, and C, and include the derived location value in the measurement information. On the other hand, if terminal D1550 does not know the locations of terminals A1520, B1530, and C1540 in advance, it can include the aforementioned measurement values ​​A, B, and C in its measurement information and transmit this information to terminal A1520. Subsequently, terminal A1520 can transmit the measurement information obtained from terminal D1550 to base station 1510. At this time, the transmitted measurement information may be one of the following: i) if measurement values ​​A, B, and C are transmitted from terminal D1550, the transmitted measurement values ​​A, B, and C are transmitted as they are; ii) if measurement values ​​A, B, and C are transmitted from terminal D1550, the location value of terminal D1550 derived from the transmitted measurement values ​​A, B, and C is transmitted; or iii) if the location value of terminal D1550 is transmitted from terminal D1550, it is transmitted as it is. Furthermore, as an example, base station 1510 can, and is not limited to, transmit the measurement information to a location server. Positioning can be performed in the manner described above.

[0216] Figure 16 shows a method for performing side-link-based positioning applicable to this disclosure.

[0217] Referring to Figure 16, sidelink-based positioning can be performed. As a specific example, in Figure 16, terminals A1620, B1630, and C1640 may be within the coverage of base station 1610. For example, each of terminals A1620, B1630, and C1640 may be in an RRC-connected state with base station 1610, but is not limited to this. In this case, the position of terminal D1650 can be measured based on sidelink-based positioning.

[0218] Here, as an example, sidelink communication may be possible between terminal A1620 and terminal D1650. Another example is that terminal A1620 can perform group communication-based sidelink communication based on groupcast. For example, terminal A1620 may be the master terminal in a group communication, but is not limited to the embodiments described above.

[0219] For the sake of clarity, the following explanation will be based on the aforementioned situation, but it is not limited to this example. Referring to Figure 16, each base station 1610 can transmit allocation information A to terminal A1620. At this time, terminal A1620 is able to communicate via sidelink with terminal D1650 and needs to transmit allocation information for terminals B1630 and C1640 to terminal D1650. Therefore, base station 1610 can transmit allocation information B and allocation information C, which are the allocation information for terminals B1630 and C1640 respectively, to terminal A1620 along with allocation information A. In other words, terminal A1620 can obtain allocation information A, allocation information B, and allocation information C from base station 1610.

[0220] Thereafter, the base station 1610 can transmit allocation information B to the terminal B1630 and transmit allocation information C to the terminal C1640. At this time, the allocation information A can be information necessary for the terminal A1620 to transmit the SL PRS A. As an example, the allocation information A can include at least one of the resources and sequence information necessary for the terminal A1620 to transmit the SL PRS A, but can also include other information. Also, the allocation information B can be information necessary for the terminal B1630 to transmit the SL PRS B. The allocation information B can include at least one of the resources and sequence information necessary for the terminal B1630 to transmit the SL PRS B, but can also include other information. Also, the allocation information C can be information necessary for the terminal C1640 to transmit the SL PRS C. The allocation information C can include at least one of the resources and sequence information necessary for the terminal C1640 to transmit the SL PRS C, but can also include other information.

[0221] At this time, as an example, each of the allocation information A, the allocation information B, and the allocation information C is transmitted from the base station 1610 to the respective terminals A1620, terminal B1630, and terminal C1640 by upper layer signaling (e.g., RRC). Also, the terminal A1620 can obtain the allocation information B and the allocation information C together with the allocation information A through upper layer signaling (e.g., RRC), as described above. Also, as an example, the allocation information B and the allocation information C transmitted together with the allocation information A may be transmitted based on the allocation information A+B+C. Here, the allocation information A+B+C can be information generated based on the allocation information A, the allocation information B, and the allocation information C, which will be described later.

[0222] Furthermore, as an example, each of the allocation information A, the allocation information B, and the allocation information C is allocated by a location server, and the allocated information may be transmitted to each terminal through the base station 1610, and is not limited to a specific embodiment.

[0223] After that, the terminal A1620 can transmit the allocation information A' to the terminal D1650. Also, the terminal A1620 can transmit the allocation information B' and the allocation information C' to the terminal D1650 together with the allocation information A'. That is, the terminal A1620 can transmit the allocation information A'+B'+C' to the terminal D1650. Here, the allocation information A'+B'+C' may be information generated based on the allocation information A', the allocation information B', and the allocation information C', which will be described later. At this time, the terminal A1620 can transmit the allocation information A'+B'+C' to the terminal D1650 through at least one of the PSCCH and the PSSCH.

[0224] Here, the allocation information A' may be information necessary for the terminal A1620 to transmit the SL PRS A to the terminal D1650. As an example, the allocation information A' may be the same information as the allocation information A. As another example, the allocation information A' may be information generated based on the allocation information A received by the terminal A1620.

[0225] Also, the allocation information B' may be information necessary for the terminal B1630 to transmit the SL PRS B to the terminal D1650. As an example, the allocation information B', which is the allocation information of the terminal B1630, may be transmitted to the terminal D1650 by the terminal A1620. That is, the terminal B1630 only performs SL PRS B transmission based on the allocation information received from the base station 1610, and the allocation information of the terminal B1630 may be transmitted to the terminal D1650 by the terminal A1620.

[0226] Also, the allocation information C', which is the allocation information of the terminal C1640, may be transmitted to the terminal D1650 by the terminal A1620. That is, the terminal C1640 only performs SL PRS C transmission based on the allocation information received from the base station 1610, and the allocation information of the terminal C1640 may be transmitted to the terminal D1650 by the terminal A1620.

[0227] Subsequently, terminal A1620 can transmit SL PRS A to terminal D1650. Similarly, terminal B1630 can transmit SL PRS B to terminal D1650. Furthermore, terminal C1640 can transmit SL PRS C to terminal D1650. In other words, each terminal can transmit its respective SL PRS to terminal D1650 based on its allocated resource information.

[0228] Subsequently, terminal D1650 can perform measurements based on SL PRS A, SL PRS B, and SL PRS C received from terminals A1620, B1630, and C1640, respectively. At this time, terminal D1650 can transmit measurement information to terminal A1620. At this time, the measurement information may be a measured value obtained based on at least one of OTDOA and RSTD from SL PRS A, SL PRS B, and SL PRS C, respectively. For example, the measured value may be A, B, and C values ​​for terminals A1620, B1630, and C1640, respectively. If terminal D1650 has prior knowledge of the locations of terminals A1620, B1630, and C1640, terminal D1650 can derive its own location value through the aforementioned measured values ​​A, B, and C, and include the derived location value in the measurement information. On the other hand, if terminal D1650 does not know the locations of terminals A1620, B1630, and C1640 in advance, the aforementioned measurement values ​​A, B, and C can be included in the measurement information, and are not limited to any particular form. Subsequently, terminal A1620 can transmit the measurement information obtained from terminal D1650 to base station 1610. At this time, the transmitted measurement information may be one of the following: i) if measurement values ​​A, B, and C are transmitted from terminal D1650, the transmitted measurement values ​​A, B, and C are transmitted as they are; ii) if measurement values ​​A, B, and C are transmitted from terminal D1650, the location value of terminal D1650 derived from the transmitted measurement values ​​A, B, and C is transmitted; or iii) if the location value of terminal D1650 is transmitted from terminal D1650, it is transmitted as it is. Furthermore, as an example, base station 1610 can further transmit the measurement information to a location server, and is not limited to this. Positioning can be performed as described above.

[0229] Figure 17 shows a method for performing side-link-based positioning applicable to this disclosure.

[0230] Referring to Figure 17, sidelink-based positioning can be performed. As a specific example, in Figure 17, terminals A1720, B1730, and C1740 may be within the coverage of base station 1710. For example, each of terminals A1720, B1730, and C1740 may be in an RRC-connected state with base station 1710, but is not limited to this. In this case, the position of terminal D1750 can be measured based on sidelink-based positioning.

[0231] Here, as an example, sidelink communication may be possible between terminal A1720 and terminal D1750, between terminal B1730 and terminal D1750, and between terminal C1740 and terminal D1750. Another example is that terminals A1720, B1730, C1740, and D1750 can perform group communication-based sidelink communication based on group cast. For example, terminal A1720 may be the master terminal in a group communication, but is not limited to the embodiments described above.

[0232] For the sake of clarity, the following explanation will be based on the aforementioned situation, but it is not limited to this example. Referring to Figure 17, terminal D1750 can transmit request information to terminal A1720. At this time, the request information may be information requesting the positioning of terminal D1750. Subsequently, terminal A1720 can transmit the request information to base station 1710 based on the request information obtained from terminal D1750. Here, for the sake of clarity, base station 1710 can transmit the received request information to a location server, but it is not limited to the embodiment described above.

[0233] Subsequently, the base station 1710 can transmit assignment information to each terminal based on the request information. As another example, the base station 1710 can receive assignment information for each terminal from the location server based on the request information and transmit the assignment information based on this, and is not limited to the embodiments described above.

[0234] Each base station 1710 can transmit allocation information A to terminal A 1720, allocation information B to terminal B 1730, and allocation information C to terminal C 1740. In this case, allocation information A may be information necessary for terminal A 1720 to transmit SL PRS A. For example, allocation information A may include at least one of the resource and sequence information necessary for terminal A 1720 to transmit SL PRS A, but may also include other information. Also, allocation information B may be information necessary for terminal B 1730 to transmit SL PRS B. Allocation information B may include at least one of the resource and sequence information necessary for terminal B 1730 to transmit SL PRS B, but may also include other information. Also, allocation information C may be information necessary for terminal C 1740 to transmit SL PRS C. Allocation information C may include at least one of the resource and sequence information necessary for terminal C 1740 to transmit SL PRS C, but may also include other information.

[0235] In this case, for example, each of the allocation information A, allocation information B, and allocation information C may be transmitted from the base station 1710 to each of the terminals A1720, B1730, and C1740 by upper-layer signaling (e.g., RRC). Here, for example, each of the allocation information A, allocation information B, and allocation information C may be allocated by a location server, and the allocated information may be transmitted to each terminal through the base station 1710, and this is not limited to a specific embodiment.

[0236] Subsequently, terminal A1720 can transmit allocation information A' to terminal D1750. Here, allocation information A' may be information necessary for terminal A1720 to transmit SL PRS A to terminal D1750. For example, allocation information A' may be the same information as allocation information A. That is, terminal A1720 can forward the allocation information received from base station 1710 to terminal D1750. Another example is that allocation information A' may be information generated by terminal A1720 based on the allocation information A received. Terminal A1720 can transmit allocation information A' to terminal D1750 through at least one of PSCCH and PSSCH.

[0237] Furthermore, terminal B1730 can transmit allocation information B' to terminal D1750. Here, allocation information B' may be information necessary for terminal B1730 to transmit SL PRS B to terminal D1750. For example, allocation information B' may be the same information as allocation information B. That is, terminal B1730 can forward the allocation information received from base station 1710 to terminal D1750. Another example is that allocation information B' may be information generated by terminal B1730 based on the allocation information B received. Terminal B1730 can transmit allocation information B' to terminal D1750 through at least one of PSCCH and PSSCH.

[0238] Furthermore, terminal C1740 can transmit allocation information C' to terminal D1750. Here, allocation information C' may be information necessary for terminal C1740 to transmit SL PRS C to terminal D1750. For example, allocation information C' may be the same information as allocation information C. That is, terminal C1740 can forward the allocation information received from base station 1710 to terminal D1750. Another example is that allocation information C' may be information generated by terminal C1740 based on the allocation information C received. That is, each terminal can transmit its own allocation information to terminal D1750. Terminal C1740 can transmit allocation information C' to terminal D1750 through at least one of PSCCH and PSSCH.

[0239] Subsequently, terminal A1720 can transmit SL PRS A to terminal D1750. Similarly, terminal B1730 can transmit SL PRS B to terminal D1750. Furthermore, terminal C1740 can transmit SL PRS C to terminal D1750. In other words, each terminal can transmit its respective SL PRS to terminal D1750 based on its allocated resource information.

[0240] Subsequently, terminal D1750 can perform measurements based on SL PRS A, SL PRS B, and SL PRS C received from terminals A1720, B1730, and C1740, respectively. At this time, terminal D1750 can transmit measurement information to terminal A1720. At this time, the measurement information may be a measured value obtained based on at least one of OTDOA and RSTD from SL PRS A, SL PRS B, and SL PRS C, respectively. For example, the measured value may be A, B, and C values ​​for terminals A1720, B1730, and C1740, respectively. If terminal D1750 has prior knowledge of the locations of terminals A1720, B1730, and C1740, terminal D1750 can derive its own location value through the aforementioned measured values ​​A, B, and C, and include the derived location value in the measurement information. On the other hand, if terminal D1750 does not know the locations of terminals A1720, B1730, and C1740 in advance, it can include the aforementioned measurement values ​​A, B, and C in the measurement information, and is not limited to any particular form. Subsequently, terminal A1720 can transmit the measurement information obtained from terminal D1750 to base station 1710. At this time, the transmitted measurement information may be one of the following: i) if measurement values ​​A, B, and C are transmitted from terminal D1650, the transmitted measurement values ​​A, B, and C are transmitted as they are; ii) if measurement values ​​A, B, and C are transmitted from terminal D1650, the location value of terminal D1650 derived from the transmitted measurement values ​​A, B, and C is transmitted; or iii) if the location value of terminal D1650 is transmitted from terminal D1650, it is transmitted as it is. Furthermore, as an example, base station 1710 can further transmit the measurement information to a location server, and is not limited to this. Positioning can be performed as described above.

[0241] Figure 18 shows a method for performing side-link-based positioning applicable to this disclosure.

[0242] Referring to FIG. 18, sidelink-based positioning can be performed. As a specific example, in FIG. 18, terminal A 1820, terminal B 1830, and terminal C 1840 can exist within the coverage of base station 1810. As an example, each of terminal A 1820, terminal B 1830, and terminal C 1840 can be in an RRC-connected state with base station 1810, but is not limited thereto. At this time, the position of terminal D 1850 can be measured based on sidelink-based positioning.

[0243] Here, as an example, sidelink communication may be possible between terminal A 1820 and terminal D 1650. As another example, terminal A 1820 can perform sidelink communication based on groupcast for group communication. As an example, terminal A 1820 can be the master terminal within group communication, but is not limited to the foregoing embodiments.

[0244] Note that, as an example, the following description is based on the foregoing situation for convenience of explanation, but is not limited thereto. Referring to FIG. 18, terminal D 1850 can transmit request information to terminal A 1820. At this time, the request information can be information requesting the positioning of terminal D 1850. Thereafter, terminal A 1820 can transmit the request information to base station 1810 based on the request information obtained from terminal D 1850. Here, as an example, base station 1810 can transmit the received request information to a location server, but is not limited to the foregoing embodiments.

[0245] Thereafter, base station 1810 can transmit allocation information to each terminal based on the request information. As another example, base station 1810 can receive allocation information for each terminal from a location server based on the request information, and transmit the allocation information based thereon, and is not limited to the foregoing embodiments.

[0246] Each base station 1810 can transmit allocation information A to terminal A1820. At this time, terminal A1820 is capable of side-link communication with terminal D1850 and needs to transmit allocation information for terminals B1830 and C1840 to terminal D1850. Therefore, base station 1810 can transmit allocation information B and allocation information C, which are the allocation information for terminals B1830 and C1840 respectively, to terminal A1820 along with allocation information A. In other words, terminal A1820 can obtain allocation information A, allocation information B, and allocation information C from base station 1810.

[0247] Subsequently, base station 1810 can transmit allocation information B to terminal B1830 and allocation information C to terminal C1840. At this time, allocation information A may be information necessary for terminal A1820 to transmit SL PRS A. For example, allocation information A may include at least one of the resource and sequence information necessary for terminal A1820 to transmit SL PRS A, but may also include other information. Also, allocation information B may be information necessary for terminal B1830 to transmit SL PRS B. Allocation information B may include at least one of the resource and sequence information necessary for terminal B1830 to transmit SL PRS B, but may also include other information. Also, allocation information C may be information necessary for terminal C1840 to transmit SL PRS C. Allocation information C may include at least one of the resource and sequence information necessary for terminal C1840 to transmit SL PRS C, but may also include other information.

[0248] In this case, for example, each of the allocation information A, allocation information B, and allocation information C may be transmitted from the base station 1810 to each of the terminals A1820, B1830, and C1840 via upper-layer signaling (e.g., RRC). Furthermore, terminal A1820 can obtain allocation information B and allocation information C along with allocation information A via upper-layer signaling (e.g., RRC), as described above. Also, for example, allocation information B and allocation information C together with allocation information A may be allocation information A+B+C. Here, allocation information A+B+C may be information generated based on allocation information A, allocation information B, and allocation information C, which will be described later.

[0249] Furthermore, as an example, each of the allocation information A, allocation information B, and allocation information C may be allocated by a location server, and the allocated information may be transmitted to each terminal via the base station 1810; however, this is not limited to any particular embodiment.

[0250] Subsequently, terminal A1820 can transmit assignment information A' to terminal D1850. Furthermore, terminal A1820 can transmit assignment information B' and assignment information C' along with assignment information A' to terminal D1850. That is, terminal A1820 can transmit assignment information A'+B'+C' to terminal D1850. Here, assignment information A'+B'+C' may be information generated based on assignment information A', assignment information B', and assignment information C', which will be described later. At this time, terminal A1820 can transmit assignment information A'+B'+C' to terminal D1850 through at least one of PSCCH and PSSCH.

[0251] Here, assignment information A' may be the information necessary for terminal A1820 to transmit SL PRS A to terminal D1850. For example, assignment information A' may be the same information as assignment information A. Another example is that assignment information A' may be information generated by terminal A1820 based on the assignment information A it received.

[0252] Furthermore, allocation information B' may be information necessary for terminal B1830 to transmit SL PRS B to terminal D1850. For example, allocation information B', which is the allocation information for terminal B1830, may be transmitted to terminal D1850 by terminal A1820. That is, terminal B1830 only performs SL PRS B transmission based on the allocation information received from base station 1810, and the allocation information for terminal B1830 may be transmitted to terminal D1850 by terminal A1820.

[0253] Furthermore, the assignment information C' for terminal C1840 may be transmitted to terminal D1850 by terminal A1820. That is, terminal C1840 only performs SL PRS C transmission based on the assignment information received from base station 1810, and the assignment information for terminal C1840 may be transmitted to terminal D1850 by terminal A1820.

[0254] Subsequently, terminal A1820 can transmit SL PRS A to terminal D1850. Similarly, terminal B1830 can transmit SL PRS B to terminal D1850. Furthermore, terminal C1840 can transmit SL PRS C to terminal D1850. In other words, each terminal can transmit its respective SL PRS to terminal D1850 based on its allocated resource information.

[0255] Subsequently, terminal D1850 can perform measurements based on SL PRS A, SL PRS B, and SL PRS C received from terminals A1820, B1830, and C1840, respectively. At this time, terminal D1850 can transmit measurement information to terminal A1820. At this time, the measurement information may be a measured value obtained based on at least one of OTDOA and RSTD from SL PRS A, SL PRS B, and SL PRS C, respectively. For example, the measured value may be A, B, and C values ​​for terminals A1820, B1830, and C1840, respectively. If terminal D1850 has prior knowledge of the locations of terminals A1820, B1830, and C1840, terminal D1850 can derive its own location value through the aforementioned measured values ​​A, B, and C, and include the derived location value in the measurement information. On the other hand, if terminal D1850 does not know the locations of terminals A1820, B1830, and C1840 in advance, it can include the aforementioned measurement values ​​A, B, and C in the measurement information, and is not limited to any particular form. Subsequently, terminal A1820 can transmit the measurement information obtained from terminal D1850 to base station 1810. At this time, the transmitted measurement information may be one of the following: i) if measurement values ​​A, B, and C are transmitted from terminal D1650, the transmitted measurement values ​​A, B, and C are transmitted as they are; ii) if measurement values ​​A, B, and C are transmitted from terminal D1650, the location value of terminal D1650 derived from the transmitted measurement values ​​A, B, and C is transmitted; or iii) if the location value of terminal D1650 is transmitted from terminal D1650, it is transmitted as it is. Furthermore, as an example, base station 1810 can further transmit the measurement information to a location server, and is not limited to this. Positioning can be performed as described above.

[0256] Figure 19 shows a method for performing side-link-based positioning applicable to this disclosure.

[0257] Referring to Figure 19, sidelink-based positioning can be performed. As a specific example, terminal A1920 may be located within the coverage of base station 1910 in Figure 19. For example, terminal A1920 may be in an RRC-connected state with base station 1910, but is not limited to this. In this case, the position of terminal D1950 can be measured based on sidelink-based positioning. Here, as an example, sidelink communication may be possible between terminal A1920 and terminal B1930, between terminal A1920 and terminal C1940, between terminal A1920 and terminal D1950, between terminal B1930 and terminal D1950, and between terminal C1940 and terminal D1950. Another example is that terminal A1920 can perform group communication-based sidelink communication based on groupcast. For example, terminal A1920 may be the master terminal in a group communication, but is not limited to the embodiments described above.

[0258] For the sake of clarity, the following explanation will be based on the situation described above, but it is not limited to this example. Referring to Figure 19, base station 1910 can transmit allocation information A, allocation information B, and allocation information C to terminal A1920. That is, base station 1910 can transmit the aforementioned information to terminal A1920 as allocation information A+B+C. For example, allocation information A+B+C may be information generated based on allocation information A, allocation information B, and allocation information C, which will be discussed later.

[0259] In this case, allocation information A may be information necessary for terminal A1920 to transmit SL PRS A. For example, allocation information A may include at least one of the resource and sequence information necessary for terminal A1920 to transmit SL PRS A, but may also include other information. Also, allocation information B may be information necessary for terminal B1930 to transmit SL PRS B. Allocation information B may include at least one of the resource and sequence information necessary for terminal B1930 to transmit SL PRS B, but may also include other information. Also, allocation information C may be information necessary for terminal C1940 to transmit SL PRS C. Allocation information C may include at least one of the resource and sequence information necessary for terminal C1940 to transmit SL PRS C, but may also include other information.

[0260] In this case, as an example, allocation information A, allocation information B, and allocation information C may be transmitted from base station 1910 to terminal A1920 by upper layer signaling (e.g., RRC). That is, the aforementioned allocation information A+B+C can be transmitted from base station 1910 to terminal A1920 by upper layer signaling (e.g., RRC). Here, as an example, each of allocation information A, allocation information B, and allocation information C may be allocated by a location server, and the allocated information may be transmitted to each terminal through base station 1910, and this is not limited to a specific embodiment.

[0261] Subsequently, terminal A1920 can generate assignment information B' and assignment information C' based on assignment information A+B+C. In this case, assignment information B' may be identical to assignment information B. As another example, assignment information B' may be generated by terminal A1920 based on assignment information B, and is not limited to the embodiments described above. Also, assignment information C' may be identical to assignment information C. As another example, assignment information C' may be generated by terminal A1920 based on assignment information C, and is not limited to the embodiments described above.

[0262] Terminal A1920 can transmit allocation information B' to terminal B1930 and allocation information C' to terminal C1940. Subsequently, terminal A1920 can transmit allocation information A' to terminal D1950. Here, allocation information A' may be the information necessary for terminal A1920 to transmit SL PRS A to terminal D1950. For example, allocation information A' may be the same information as allocation information A. That is, terminal A1920 can forward the allocation information received from base station 1910 to terminal D1950. Another example is that allocation information A' may be information generated by terminal A1920 based on the allocation information A received. Terminal A1920 can transmit allocation information A' to terminal D1950 through at least one of PSCCH and PSSCH.

[0263] Furthermore, terminal B1930 can transmit assignment information B' to terminal D1950. Here, assignment information B' is the information necessary for terminal B1930 to transmit SL PRS B to terminal D1950, and can be obtained from terminal A1920. Terminal B1930 can transmit assignment information B' to terminal D1950 through at least one of PSCCH and PSSCH.

[0264] Furthermore, terminal C1940 can transmit assignment information C' to terminal D1950. Here, assignment information C' is the information necessary for terminal C1940 to transmit SL PRS C to terminal D1950, and can be obtained from terminal A1920. That is, each terminal can transmit its own assignment information to terminal D1950. Terminal C1940 can transmit assignment information C' to terminal D1950 through at least one of PSCCH and PSSCH.

[0265] Subsequently, terminal A1920 can transmit SL PRS A to terminal D1950. Similarly, terminal B1930 can transmit SL PRS B to terminal D1950. Furthermore, terminal C1940 can transmit SL PRS C to terminal D1950. In other words, each terminal can transmit its respective SL PRS to terminal D1950 based on its allocated resource information.

[0266] Subsequently, terminal D1950 can perform measurements based on SL PRS A, SL PRS B, and SL PRS C received from terminals A1920, B1930, and C1940, respectively. At this time, terminal D1950 can transmit measurement information to terminal A1920. At this time, the measurement information may be a measured value obtained based on at least one of OTDOA and RSTD from SL PRS A, SL PRS B, and SL PRS C, respectively. As an example, the measured value may be A, B, and C values ​​for terminals A1920, B1930, and C1940, respectively. If terminal D1950 has prior knowledge of the locations of terminals A1920, B1930, and C1940, terminal D1950 can derive its own location value through the aforementioned measured values ​​A, B, and C, and include the derived location value in the measurement information. On the other hand, if terminal D1950 does not know the locations of terminals A1920, B1930, and C1940 in advance, it can include the aforementioned measurement values ​​A, B, and C in the measurement information, and is not limited to any particular form. Subsequently, terminal A1920 can transmit the measurement information obtained from terminal D1950 to base station 1910. At this time, the transmitted measurement information may be one of the following: i) if measurement values ​​A, B, and C are transmitted from terminal D1650, the transmitted measurement values ​​A, B, and C are transmitted as they are; ii) if measurement values ​​A, B, and C are transmitted from terminal D1650, the location value of terminal D1650 derived from the transmitted measurement values ​​A, B, and C is transmitted; or iii) if the location value of terminal D1650 is transmitted from terminal D1650, it is transmitted as it is. Furthermore, as an example, base station 1910 can further transmit the measurement information to a location server, and is not limited to this. Positioning can be performed as described above.

[0267] Figure 20 shows a method for performing side-link-based positioning applicable to this disclosure.

[0268] Referring to Figure 20, sidelink-based positioning can be performed. As a specific example, terminal A2020 may be located within the coverage of base station 2010 in Figure 20. For example, terminal A2020 may be in an RRC-connected state with base station 2010, but is not limited to this. In this case, the position of terminal D2050 can be measured based on sidelink-based positioning. Here, for example, sidelink communication may be possible between terminal A2020 and terminal B2030, between terminal A2020 and terminal C2040, and between terminal A2020 and terminal D2050. Another example is that terminal A2020 can perform group communication-based sidelink communication based on group cast. For example, terminal A2020 may be the master terminal in group communication, but is not limited to the embodiments described above.

[0269] For the sake of clarity, the following explanation will be based on the situation described above, but it is not limited to this example. Referring to Figure 20, base station 2010 can transmit allocation information A, allocation information B, and allocation information C to terminal A2020. That is, base station 2010 can transmit the aforementioned information to terminal A2020 as allocation information A+B+C. For example, allocation information A+B+C may be information generated based on allocation information A, allocation information B, and allocation information C, which will be discussed later.

[0270] In this case, allocation information A may be information necessary for terminal A2020 to transmit SL PRS A. For example, allocation information A may include at least one of the resource and sequence information necessary for terminal A2020 to transmit SL PRS A, but may also include other information. Also, allocation information B may be information necessary for terminal B2030 to transmit SL PRS B. Allocation information B may include at least one of the resource and sequence information necessary for terminal B2030 to transmit SL PRS B, but may also include other information. Also, allocation information C may be information necessary for terminal C2040 to transmit SL PRS C. Allocation information C may include at least one of the resource and sequence information necessary for terminal C2040 to transmit SL PRS C, but may also include other information.

[0271] In this case, as an example, allocation information A, allocation information B, and allocation information C may be transmitted from base station 2010 to terminal A2020 by upper layer signaling (e.g., RRC). That is, the aforementioned allocation information A+B+C can be transmitted from base station 2010 to terminal A2020 by upper layer signaling (e.g., RRC). Here, as an example, each of allocation information A, allocation information B, and allocation information C may be allocated by a location server, and the allocated information may be transmitted to each terminal through base station 2010, and this is not limited to a specific embodiment.

[0272] Subsequently, terminal A2020 can generate allocation information B' and allocation information C' based on allocation information A+B+C. In this case, allocation information B' may be identical to allocation information B. As another example, allocation information B' may be generated by terminal A2020 based on allocation information B, and is not limited to the embodiments described above. Furthermore, allocation information C' may be identical to allocation information C. As another example, allocation information C' may be generated by terminal A2020 based on allocation information C, and is not limited to the embodiments described above.

[0273] Terminal A2020 can transmit assignment information B' to terminal B2030 and assignment information C' to terminal C2040. Furthermore, assignment information A' may be identical to assignment information A. As another example, assignment information A' may be generated by terminal A2020 based on assignment information A, and is not limited to the embodiments described above. Furthermore, assignment information A+B+C may be identical to assignment information A'+B'+C'. As yet another example, assignment information A'+B'+C' may be generated by terminal A2020 based on assignment information A+B+C, and is not limited to the embodiments described above.

[0274] At this time, terminal A2020 can transmit the assignment information A'+B'+C' to terminal D2050 via at least one of PSCCH and PSSCH. That is, unlike in Figure 19, sidelink communication exists only between terminal A2020 and terminal D2050, and there is no sidelink communication between terminal B2030 and terminal D2050, and between terminal C2040 and terminal D2050, so terminal A2020 can transmit the assignment information A'+B'+C' to terminal D2050.

[0275] Subsequently, terminal A2020 can transmit SL PRS A to terminal D2050. Similarly, terminal B2030 can transmit SL PRS B to terminal D2050. Furthermore, terminal C2040 can transmit SL PRS C to terminal D2050. In other words, each terminal can transmit its respective SL PRS to terminal D2050 based on its allocated resource information.

[0276] Subsequently, terminal D2050 can perform measurements based on SL PRS A, SL PRS B, and SL PRS C received from terminals A2020, B2030, and C2040, respectively. At this time, terminal D2050 can transmit measurement information to terminal A2020. At this time, the measurement information may be a measured value obtained based on at least one of OTDOA and RSTD from SL PRS A, SL PRS B, and SL PRS C, respectively. For example, the measured value may be A, B, and C values ​​for terminals A2020, B2030, and C2040, respectively. If terminal D2050 has prior knowledge of the locations of terminals A2020, B2030, and C2040, terminal D2050 can derive its own location value through the aforementioned measured values ​​A, B, and C, and include the derived location value in the measurement information. On the other hand, if terminal D2050 does not know the locations of terminals A2020, B2030, and C2040 in advance, it can include the aforementioned measurement values ​​A, B, and C in the measurement information, and is not limited to any particular form. Subsequently, terminal A2020 can transmit the measurement information obtained from terminal D2050 to base station 2010. At this time, the transmitted measurement information may be one of the following: i) if measurement values ​​A, B, and C are transmitted from terminal D1650, the transmitted measurement values ​​A, B, and C are transmitted as they are; ii) if measurement values ​​A, B, and C are transmitted from terminal D1650, the location value of terminal D1650 derived from the transmitted measurement values ​​A, B, and C is transmitted; or iii) if the location value of terminal D1650 is transmitted from terminal D1650, it is transmitted as it is. Furthermore, as an example, base station 2010 can further transmit the measurement information to a location server, and is not limited to this. Positioning can be performed as described above.

[0277] Figure 21 shows a method for performing side-link-based positioning applicable to this disclosure.

[0278] Referring to Figure 21, sidelink-based positioning can be performed. As a specific example, terminal A2120 may be within the coverage of base station 2110 in Figure 21. For example, terminal A2120 may be in an RRC-connected state with base station 2110, but is not limited to this. In this case, the position of terminal D2150 can be measured based on sidelink-based positioning. Here, as an example, sidelink communication may be possible between terminal A2120 and terminal B2130, between terminal A2120 and terminal C2140, between terminal A2120 and terminal D2150, between terminal B2130 and terminal D2150, and between terminal C2140 and terminal D2150. Another example is that terminal A2120 can perform group communication-based sidelink communication based on groupcast. For example, terminal A2120 may be the master terminal in a group communication, but is not limited to the embodiments described above.

[0279] For the sake of clarity, the following explanation will be based on the aforementioned situation, but it is not limited to this example. Referring to Figure 21, terminal D2150 can transmit request information to terminal A2120. At this time, the request information may be information requesting the positioning of terminal D2150. Subsequently, terminal A2120 can transmit the request information to base station 2110 based on the request information obtained from terminal D2150. Here, for the sake of clarity, base station 2110 can transmit the received request information to a location server, but it is not limited to the embodiment described above.

[0280] Subsequently, the base station 2110 can transmit assignment information to each terminal based on the request information. As another example, the base station 2110 can receive assignment information to each terminal from the location server based on the request information and transmit the assignment information based on this, and is not limited to the embodiments described above.

[0281] Base station 2110 can transmit allocation information A, allocation information B, and allocation information C to terminal A2120. For example, base station 2110 can transmit the aforementioned information to terminal A2120 as allocation information A+B+C. That is, allocation information A+B+C may be information generated based on allocation information A, allocation information B, and allocation information C, which will be described later.

[0282] In this case, allocation information A may be information necessary for terminal A2120 to transmit SL PRS A. For example, allocation information A may include at least one of the resource and sequence information necessary for terminal A2120 to transmit SL PRS A, but may also include other information. Also, allocation information B may be information necessary for terminal B2130 to transmit SL PRS B. Allocation information B may include at least one of the resource and sequence information necessary for terminal B2130 to transmit SL PRS B, but may also include other information. Also, allocation information C may be information necessary for terminal C2140 to transmit SL PRS C. Allocation information C may include at least one of the resource and sequence information necessary for terminal C2140 to transmit SL PRS C, but may also include other information.

[0283] In this case, as an example, allocation information A, allocation information B, and allocation information C may be transmitted from base station 2110 to terminal A2120 by upper layer signaling (e.g., RRC). That is, the aforementioned allocation information A+B+C can be transmitted from base station 2110 to terminal A2120 by upper layer signaling (e.g., RRC). Here, as an example, each of allocation information A, allocation information B, and allocation information C may be allocated by a location server, and the allocated information may be transmitted to each terminal through base station 2110, and this is not limited to a specific embodiment.

[0284] Subsequently, terminal A2120 can generate allocation information B' and allocation information C' based on allocation information A+B+C. In this case, allocation information B' may be identical to allocation information B. As another example, allocation information B' may be generated by terminal A2120 based on allocation information B, and is not limited to the embodiments described above. In this case, allocation information C' may be identical to allocation information C. As another example, allocation information C' may be generated by terminal A2120 based on allocation information C, and is not limited to the embodiments described above.

[0285] Terminal A2120 can transmit allocation information B' to terminal B2130 and allocation information C' to terminal C2140. Subsequently, terminal A2120 can transmit allocation information A' to terminal D2150. Here, allocation information A' may be information necessary for terminal A2120 to transmit SL PRS A to terminal D2150. For example, allocation information A' may be the same information as allocation information A. That is, terminal A2120 can forward the allocation information received from base station 2110 to terminal D2150. Another example is that allocation information A' may be information generated by terminal A2120 based on the allocation information A received. In this case, terminal A2120 can transmit allocation information A' to terminal D2150 through at least one of PSCCH and PSSCH.

[0286] Furthermore, terminal B2130 can transmit allocation information B' to terminal D2150. Here, allocation information B' is the information necessary for terminal B2130 to transmit SL PRS B to terminal D2150, and can be obtained from terminal A2120. At this time, terminal B2130 can transmit allocation information B' to terminal D2150 through at least one of PSCCH and PSSCH.

[0287] Furthermore, terminal C2140 can transmit assignment information C' to terminal D2150. Here, assignment information C' is the information necessary for terminal C2140 to transmit SL PRS C to terminal D2150, and can be obtained from terminal A2120. At this time, terminal C2140 can transmit assignment information C' to terminal D2150 through at least one of PSCCH and PSSCH. In other words, each terminal can transmit its own assignment information to terminal D2150.

[0288] Subsequently, terminal A2120 can transmit SL PRS A to terminal D2150. Similarly, terminal B2130 can transmit SL PRS B to terminal D2150. Furthermore, terminal C2140 can transmit SL PRS C to terminal D2150. In other words, each terminal can transmit its respective SL PRS to terminal D2150 based on its allocated resource information.

[0289] Subsequently, terminal D2150 can perform measurements based on SL PRS A, SL PRS B, and SL PRS C received from terminals A2120, B2130, and C2140, respectively. At this time, terminal D2150 can transmit measurement information to terminal A2120. At this time, the measurement information may be a measured value obtained based on at least one of OTDOA and RSTD from SL PRS A, SL PRS B, and SL PRS C, respectively. For example, the measured value may be A, B, and C values ​​for terminals A2120, B2130, and C2140, respectively. If terminal D2150 has prior knowledge of the locations of terminals A2120, B2130, and C2140, terminal D2150 can derive its own location value through the aforementioned measured values ​​A, B, and C, and include the derived location value in the measurement information. On the other hand, if terminal D2150 does not know the locations of terminals A2120, B2130, and C2140 in advance, it can include the aforementioned measurement values ​​A, B, and C in the measurement information, and is not limited to any particular form. Subsequently, terminal A2120 can transmit the measurement information obtained from terminal D2150 to base station 2110. At this time, the transmitted measurement information may be one of the following: i) if measurement values ​​A, B, and C are transmitted from terminal D1650, the transmitted measurement values ​​A, B, and C are transmitted as they are; ii) if measurement values ​​A, B, and C are transmitted from terminal D1650, the location value of terminal D1650 derived from the transmitted measurement values ​​A, B, and C is transmitted; or iii) if the location value of terminal D1650 is transmitted from terminal D1650, it is transmitted as it is. Furthermore, as an example, base station 2110 can further transmit the measurement information to a location server, and is not limited to this. Positioning can be performed as described above.

[0290] Figure 22 shows a method for performing side-link-based positioning applicable to this disclosure.

[0291] Referring to Figure 22, sidelink-based positioning can be performed. As a specific example, terminal A2220 may be located within the coverage of base station 2210 in Figure 22. For example, terminal A2220 may be in an RRC-connected state with base station 2210, but is not limited to this. In this case, the position of terminal D2250 can be measured based on sidelink-based positioning. Here, for example, sidelink communication may be possible between terminal A2220 and terminal B2230, between terminal A2220 and terminal C2240, and between terminal A2220 and terminal D2250. As another example, terminal A2220 can perform group communication-based sidelink communication based on group cast. For example, terminal A2220 may be the master terminal in a group communication, but is not limited to the embodiments described above.

[0292] For the sake of clarity, the following explanation will be based on the aforementioned situation, but it is not limited to this example. Referring to Figure 22, terminal D2250 can transmit request information to terminal A2220. At this time, the request information may be information requesting the positioning of terminal D2250. Subsequently, terminal A2220 can transmit the request information to base station 2210 based on the request information obtained from terminal D2250. Here, for the sake of clarity, base station 2210 can transmit the received request information to a position server, but it is not limited to the embodiment described above.

[0293] Subsequently, the base station 2210 can transmit assignment information to each terminal based on the request information. As another example, the base station 2210 can receive assignment information to each terminal from the location server based on the request information and transmit the assignment information based on this, and is not limited to the embodiments described above.

[0294] Referring to Figure 22, base station 2210 can transmit allocation information A, allocation information B, and allocation information C to terminal A2220. As an example, base station 2210 can transmit the aforementioned information to terminal A2220 as allocation information A+B+C. That is, allocation information A+B+C may be information generated based on allocation information A, allocation information B, and allocation information C, which will be described later.

[0295] In this case, allocation information A may be information necessary for terminal A2220 to transmit SL PRS A. For example, allocation information A may include at least one of the resource and sequence information necessary for terminal A2220 to transmit SL PRS A, but may also include other information. Also, allocation information B may be information necessary for terminal B2230 to transmit SL PRS B. Allocation information B may include at least one of the resource and sequence information necessary for terminal B2230 to transmit SL PRS B, but may also include other information. Also, allocation information C may be information necessary for terminal C2240 to transmit SL PRS C. Allocation information C may include at least one of the resource and sequence information necessary for terminal C2240 to transmit SL PRS C, but may also include other information.

[0296] In this case, as an example, allocation information A, allocation information B, and allocation information C may be transmitted from base station 2210 to terminal A2220 by upper layer signaling (e.g., RRC). That is, the aforementioned allocation information A+B+C can be transmitted from base station 2210 to terminal A2220 by upper layer signaling (e.g., RRC). Here, as an example, each of allocation information A, allocation information B, and allocation information C may be allocated by a location server, and the allocated information may be transmitted to each terminal through base station 2210, and this is not limited to a specific embodiment.

[0297] Subsequently, terminal A2220 can generate allocation information B' and allocation information C' based on allocation information A+B+C. In this case, allocation information B' may be identical to allocation information B. As another example, allocation information B' may be generated by terminal A2220 based on allocation information B, and is not limited to the embodiments described above. In this case, allocation information C' may be identical to allocation information C. As another example, allocation information C' may be generated by terminal A2220 based on allocation information C, and is not limited to the embodiments described above.

[0298] Terminal A2220 can transmit assignment information B' to terminal B2230 and assignment information C' to terminal C2240. Furthermore, assignment information A' may be identical to assignment information A. As another example, assignment information A' may be generated by terminal A2220 based on assignment information A, and is not limited to the embodiments described above. Furthermore, assignment information A+B+C may be identical to assignment information A'+B'+C'. As yet another example, assignment information A'+B'+C' may be generated by terminal A2220 based on assignment information A+B+C, and is not limited to the embodiments described above.

[0299] At this time, terminal A2220 can transmit the assignment information A'+B'+C' to terminal D2250 via at least one of PSCCH and PSSCH. That is, unlike in Figure 21, sidelink communication exists only between terminal A2220 and terminal D2250, and there is no sidelink communication between terminal B2230 and terminal D2250, and between terminal C2240 and terminal D2250, so terminal A2220 can transmit the assignment information A'+B'+C' to terminal D2250.

[0300] Subsequently, terminal A2220 can transmit SL PRS A to terminal D2250. Terminal B2230 can also transmit SL PRS B to terminal D2250. Furthermore, terminal C2240 can perform a sidelink transmission to terminal D2250. That is, terminal C2240 can transmit SL PRS C to terminal D2250. In other words, each terminal can transmit its respective SL PRS to terminal D2250 based on its allocated resource information.

[0301] Subsequently, terminal D2250 can perform measurements based on SL PRS A, SL PRS B, and SL PRS C received from terminals A2220, B2230, and C2240, respectively. At this time, terminal D2250 can transmit measurement information to terminal A2220. At this time, the measurement information may be a measured value obtained based on at least one of OTDOA and RSTD from SL PRS A, SL PRS B, and SL PRS C, respectively. For example, the measured values ​​may be A, B, and C for terminals A2220, B2230, and C2240, respectively. If terminal D2250 has prior knowledge of the locations of terminals A2220, B2230, and C2240, terminal D2250 can derive its own location value through the aforementioned measured values ​​A, B, and C, and include the derived location value in the measurement information. On the other hand, if terminal D2250 does not know the locations of terminals A2220, B2230, and C2240 in advance, it can include the aforementioned measurement values ​​A, B, and C in the measurement information, and is not limited to any particular form. Subsequently, terminal A2220 can transmit the measurement information obtained from terminal D2250 to base station 2210. At this time, the transmitted measurement information may be one of the following: i) if measurement values ​​A, B, and C are transmitted from terminal D1650, the transmitted measurement values ​​A, B, and C are transmitted as they are; ii) if measurement values ​​A, B, and C are transmitted from terminal D1650, the location value of terminal D1650 derived from the transmitted measurement values ​​A, B, and C is transmitted; or iii) if the location value of terminal D1650 is transmitted from terminal D1650, it is transmitted as it is. Furthermore, as an example, base station 2210 can further transmit the measurement information to a location server, and is not limited to this. Positioning can be performed as described above.

[0302] Figure 23 shows a method for performing side-link-based positioning applicable to this disclosure.

[0303] Referring to Figure 23, sidelink-based positioning can be performed. As a specific example, Figure 23 shows that positioning can be performed based on sidelink communication between terminals without base station control. For example, the position of terminal D2340 can be measured based on sidelink-based positioning. Here, as an example, sidelink communication may be possible between terminal A2310 and terminal B2320, between terminal A2310 and terminal C2330, between terminal A2310 and terminal D2340, between terminal B2320 and terminal D2340, and between terminal C2330 and terminal D2340. As another example, terminal A2310 can perform group communication-based sidelink communication based on group cast. For example, terminal A2310 may be the master terminal in a group communication, but is not limited to the embodiments described above.

[0304] For the sake of clarity, the following explanation will be based on the situation described above, but it is not limited to this example. Referring to Figure 23, terminal A2310 can generate allocation information A, allocation information B, and allocation information C. For example, terminal A2310 can transmit the generated allocation information B to terminal B2320 and allocation information C to terminal C2330. In addition, terminal A2310 can transmit allocation information A, which is the allocation information for terminal A2310, to terminal D2340.

[0305] In this case, allocation information A may be information necessary for terminal A2310 to transmit SL PRS A. For example, allocation information A may include at least one of the resource and sequence information necessary for terminal A2310 to transmit SL PRS A, but may also include other information. Also, allocation information B may be information necessary for terminal B2320 to transmit SL PRS B. Allocation information B may include at least one of the resource and sequence information necessary for terminal B2320 to transmit SL PRS B, but may also include other information. Also, allocation information C may be information necessary for terminal C2330 to transmit SL PRS C. Allocation information C may include at least one of the resource and sequence information necessary for terminal C2330 to transmit SL PRS C, but may also include other information.

[0306] Subsequently, terminal B2320 can generate allocation information B' based on allocation information B obtained from terminal A2310 and transmit it to terminal D2340 via at least one of PSCCH and PSSCH. At this time, allocation information B' may be identical to allocation information B. As another example, allocation information B' may be generated by terminal B2320 based on allocation information B, and is not limited to the embodiments described above.

[0307] Furthermore, terminal C2330 can generate allocation information C' based on allocation information C obtained from terminal A2310 and transmit it to terminal D2340 via at least one of PSCCH and PSSCH. In this case, allocation information C' may be identical to allocation information C. Another example is that allocation information C' may be generated by terminal C2330 based on allocation information C, and the embodiment is not limited to those described above.

[0308] Subsequently, terminal A2310 can transmit SL PRS A to terminal D2340. Similarly, terminal B2320 can transmit SL PRS B to terminal D2340. Furthermore, terminal C2330 can transmit SL PRS C to terminal D2340. In other words, each terminal can transmit its respective SL PRS to terminal D2340 based on its allocated resource information.

[0309] Subsequently, terminal D2340 can perform measurements based on SL PRS A, SL PRS B, and SL PRS C received from terminals A2310, B2320, and C2330, respectively. At this time, terminal D2340 can transmit measurement information to terminal A2310. At this time, the measurement information may be a measured value obtained based on at least one of OTDOA and RSTD from SL PRS A, SL PRS B, and SL PRS C, respectively. For example, the measured value may be A, B, and C values ​​for terminals A2310, B2320, and C2330, respectively. If terminal D2340 has prior knowledge of the locations of terminals A2310, B2320, and C2330, terminal D2340 can derive its own location value through the aforementioned measured values ​​A, B, and C, and include the derived location value in the measurement information. On the other hand, if terminal D2340 does not know the locations of terminals A2310, B2320, and C2330 in advance, the aforementioned measurement values ​​A, B, and C can be included in the measurement information, and are not limited to a specific form. In this case, if measurement values ​​A, B, and C are transmitted from terminal D2340 to terminal A2310, terminal A2310 can derive the location value of terminal D2340 based on these measurement values.

[0310] Figure 24 shows a method for performing side-link-based positioning applicable to this disclosure.

[0311] Referring to Figure 24, sidelink-based positioning can be performed. As a specific example, Figure 24 shows that positioning can be performed based on sidelink communication between terminals without base station control. For example, the position of terminal D2440 can be measured based on sidelink-based positioning. Here, for example, sidelink communication may be possible between terminal A2410 and terminal B2420, between terminal A2410 and terminal C2430, and between terminal A2410 and terminal D2440. As another example, terminal A2410 can perform group communication-based sidelink communication based on group cast. For example, terminal A2410 may be the master terminal in a group communication, but is not limited to the embodiments described above.

[0312] For the sake of clarity, the following explanation will be based on the aforementioned situation, but it is not limited to this example. Referring to Figure 24, terminal A2410 can generate allocation information A, allocation information B, and allocation information C. For example, terminal A2410 can transmit the generated allocation information B to terminal B2420 and allocation information C to terminal C2430. In addition, terminal A2410 can transmit allocation information A, which is the allocation information for terminal A2410, together with allocation information B and allocation information C to terminal D2440. That is, terminal A2410 can transmit allocation information A+B+C to terminal D2440. Here, allocation information A+B+C may be information generated based on allocation information A, allocation information B, and allocation information C, which will be discussed later.

[0313] In this case, allocation information A may be information necessary for terminal A2410 to transmit SL PRS A. For example, allocation information A may include at least one of the resource and sequence information necessary for terminal A2410 to transmit SL PRS A, but may also include other information. Also, allocation information B may be information necessary for terminal B2420 to transmit SL PRS B. Allocation information B may include at least one of the resource and sequence information necessary for terminal B2420 to transmit SL PRS B, but may also include other information. Also, allocation information C may be information necessary for terminal C2430 to transmit SL PRS C. Allocation information C may include at least one of the resource and sequence information necessary for terminal C2430 to transmit SL PRS C, but may also include other information.

[0314] Subsequently, terminal A2410 can transmit SL PRS A to terminal D2440. Similarly, terminal B2420 can transmit SL PRS B to terminal D2440. Furthermore, terminal C2430 can transmit SL PRS C to terminal D2440. In other words, each terminal can transmit its respective SL PRS to terminal D2440 based on its allocated resource information.

[0315] Subsequently, terminal D2440 can perform measurements based on SL PRS A, SL PRS B, and SL PRS C received from terminals A2410, B2420, and C2430, respectively. At this time, terminal D2440 can transmit measurement information to terminal A2410. At this time, the measurement information may be a measured value obtained based on at least one of OTDOA and RSTD from SL PRS A, SL PRS B, and SL PRS C, respectively. For example, the measured value may be A, B, and C values ​​for terminals A2410, B2420, and C2430, respectively. If terminal D2440 has prior knowledge of the locations of terminals A2410, B2420, and C2430, terminal D2440 can derive its own location value through the aforementioned measured values ​​A, B, and C, and include the derived location value in the measurement information. On the other hand, if terminal D2440 does not have prior knowledge of the locations of terminals A2410, B2420, and C2430, the aforementioned measurement values ​​A, B, and C can be included in the measurement information, and are not limited to a specific form. In this case, if measurement values ​​A, B, and C are transmitted from terminal D2440 to terminal A2410, terminal A2410 can derive the location value of terminal D2440 based on these measurement values.

[0316] Figure 25 shows a method for performing side-link-based positioning applicable to this disclosure.

[0317] Referring to Figure 25, sidelink-based positioning can be performed. As a specific example, Figure 25 shows that positioning can be performed based on sidelink communication between terminals without base station control. For example, the position of terminal D2540 can be measured based on sidelink-based positioning. Here, for example, sidelink communication may be possible between terminal A2510 and terminal B2520, between terminal A2510 and terminal C2530, between terminal A2510 and terminal D2540, between terminal B2520 and terminal D2540, and between terminal C2530 and terminal D2540. Another example is that terminal A2510 can perform group communication-based sidelink communication based on group cast. For example, terminal A2510 may be the master terminal in a group communication, but is not limited to the embodiments described above.

[0318] For the sake of clarity, the following explanation will be based on the aforementioned situation, but it is not limited to this example. Referring to Figure 25, terminal D2540 can transmit request information to terminal A2510. At this time, the request information may be information requesting the positioning of terminal D2540. Subsequently, terminal A2510 can generate assignment information for each terminal based on the request information. For example, terminal A2510 can generate assignment information A, assignment information B, and assignment information C. For example, terminal A2510 can transmit the generated assignment information B to terminal B2520 and assignment information C to terminal C2530. In addition, terminal A2510 can transmit assignment information A, which is the assignment information for terminal A2510, to terminal D2540.

[0319] In this case, allocation information A may be information necessary for terminal A2510 to transmit SL PRS A. For example, allocation information A may include at least one of the resource and sequence information necessary for terminal A2510 to transmit SL PRS A, but may also include other information. Also, allocation information B may be information necessary for terminal B2520 to transmit SL PRS B. Allocation information B may include at least one of the resource and sequence information necessary for terminal B2520 to transmit SL PRS B, but may also include other information. Also, allocation information C may be information necessary for terminal C2530 to transmit SL PRS C. Allocation information C may include at least one of the resource and sequence information necessary for terminal C2530 to transmit SL PRS C, but may also include other information.

[0320] For example, at this time, terminal B2520 may then generate allocation information B' based on allocation information B obtained from terminal A2510 and transmit it to terminal D2540 via at least one of PSCCH and PSSCH. At this time, allocation information B' may be identical to allocation information B. As another example, allocation information B' may be generated by terminal B2520 based on allocation information B, and is not limited to the embodiments described above.

[0321] Furthermore, terminal C2530 can generate allocation information C' based on allocation information C obtained from terminal A2510 and transmit it to terminal D2540 via at least one of PSCCH and PSSCH. In this case, allocation information C' may be identical to allocation information C. Another example is that allocation information C' may be generated by terminal C2530 based on allocation information C, and the embodiment is not limited to those described above.

[0322] Subsequently, terminal A2510 can transmit SL PRS A to terminal D2540. Similarly, terminal B2520 can transmit SL PRS B to terminal D2540. Furthermore, terminal C2530 can transmit SL PRS C to terminal D2540. In other words, each terminal can transmit its respective SL PRS to terminal D2540 based on its assigned resource information.

[0323] Subsequently, terminal D2540 can perform measurements based on SL PRS A, SL PRS B, and SL PRS C received from terminals A2510, B2520, and C2530, respectively. At this time, terminal D2540 can transmit measurement information to terminal A2510. At this time, the measurement information may be a measured value obtained based on at least one of OTDOA and RSTD from SL PRS A, SL PRS B, and SL PRS C, respectively. For example, the measured value may be A, B, and C values ​​for terminals A2510, B2520, and C2530, respectively. If terminal D2540 has prior knowledge of the locations of terminals A2510, B2520, and C2530, terminal D2540 can derive its own location value through the aforementioned measured values ​​A, B, and C, and include the derived location value in the measurement information. On the other hand, if terminal D2540 does not know the locations of terminals A2510, B2520, and C2530 in advance, the aforementioned measurement values ​​A, B, and C can be included in the measurement information, and are not limited to a specific form. Here, if measurement values ​​A, B, and C are transmitted from terminal D2540 to terminal A2510, terminal A2510 can derive the location value of terminal D2540 based on these measurement values.

[0324] Figure 26 shows a method for performing side-link-based positioning applicable to this disclosure.

[0325] Referring to Figure 26, sidelink-based positioning can be performed. As a specific example, Figure 26 shows that positioning can be performed based on sidelink communication between terminals without base station control. For example, the position of terminal D2640 can be measured based on sidelink-based positioning. Here, for example, sidelink communication may be possible between terminal A2610 and terminal B2620, between terminal A2610 and terminal C2630, and between terminal A2610 and terminal D2640. As another example, terminal A2610 can perform group communication-based sidelink communication based on group cast. For example, terminal A2610 may be the master terminal in a group communication, but is not limited to the embodiments described above.

[0326] For the sake of clarity, the following explanation will be based on the aforementioned situation, but it is not limited to this example. Referring to Figure 26, terminal D2640 can transmit request information to terminal A2610. At this time, the request information may be information requesting the positioning of terminal D2640. Subsequently, terminal A2610 can generate assignment information for each terminal based on the request information. For example, terminal A2610 can generate assignment information A, assignment information B, and assignment information C. For example, terminal A2610 can transmit the generated assignment information B to terminal B2620 and assignment information C to terminal C2630. In addition, terminal A2610 can transmit assignment information A, which is the assignment information for terminal A2610, together with assignment information B and assignment information C to terminal D2640. That is, terminal A2610 can transmit assignment information A + B + C to terminal D2640. Here, assignment information A+B+C may be information generated based on assignment information A, assignment information B, and assignment information C, which will be discussed later.

[0327] In this case, allocation information A may be information necessary for terminal A2610 to transmit SL PRS A. For example, allocation information A may include at least one of the resource and sequence information necessary for terminal A2610 to transmit SL PRS A, but may also include other information. Also, allocation information B may be information necessary for terminal B2620 to transmit SL PRS B. Allocation information B may include at least one of the resource and sequence information necessary for terminal B2620 to transmit SL PRS B, but may also include other information. Also, allocation information C may be information necessary for terminal C2630 to transmit SL PRS C. Allocation information C may include at least one of the resource and sequence information necessary for terminal C2630 to transmit SL PRS C, but may also include other information.

[0328] Subsequently, terminal A2610 can transmit SL PRS A to terminal D2640. Similarly, terminal B2620 can transmit SL PRS B to terminal D2640. Furthermore, terminal C2630 can transmit SL PRS C to terminal D2640 via at least one of PSCCH and PSSCH. In other words, each terminal can transmit its respective SL PRS to terminal D2640 based on its assigned resource information.

[0329] Subsequently, terminal D2640 can perform measurements based on SL PRS A, SL PRS B, and SL PRS C received from terminals A2610, B2620, and C2630, respectively. At this time, terminal D2640 can transmit measurement information to terminal A2610. At this time, the measurement information may be a measured value obtained based on at least one of OTDOA and RSTD from SL PRS A, SL PRS B, and SL PRS C, respectively. For example, the measured values ​​may be A, B, and C for terminals A2610, B2620, and C2630, respectively. If terminal D2640 has prior knowledge of the locations of terminals A2610, B2620, and C2630, terminal D2640 can derive its own location value through the aforementioned measured values ​​A, B, and C, and include the derived location value in the measurement information. On the other hand, if terminal D2640 does not know the locations of terminals A2610, B2620, and C2630 in advance, the aforementioned measurement values ​​A, B, and C can be included in the measurement information, and are not limited to a specific form. In this case, if measurement values ​​A, B, and C are transmitted from terminal D2640 to terminal A2610, terminal A2610 can derive the location value of terminal D2640 based on these measurement values.

[0330] Positioning can be performed based on SL PRS as described in Figures 15 to 26 above. In this case, for example, the allocation information for SL PRS positioning may include at least one of the resource and sequence information for SL PRS transmission. Furthermore, for example, the allocation information may include other information, as described above. In this case, for example, the resources and sequences of each SL PRS may be different, and a method for distinguishing them may be necessary.

[0331] TIFF0007855262000016.tif61170

[0332]

number

[0333]

number

[0334] TIFF0007855262000019.tif130170

[0335] Furthermore, as an example, since assignment information A+B+C is also generated based on assignment information A, assignment information B, and assignment information C, assignment information A+B+C can include each sequence ID information as sequence information among the information for each of assignment information A, assignment information B, and assignment information C.

[0336] TIFF0007855262000020.tif54170

[0337] As another example, the aforementioned sequence ID information can be provided to the terminal from the base station via higher-layer signaling (e.g., RRC). Therefore, in Figures 15 to 22, the terminal can obtain sequence ID information, but in Figures 23 to 26, the terminal performing side-link communication without base station control may not be able to obtain PRS ID information. Therefore, in Figures 23 to 26, the terminal needs to determine the PRS ID itself.

[0338] As a concrete example, consider the case of group-based sidelink communication. In this case, the PRS ID for the PRS sequence can be determined based on a combination of the group ID and the terminal ID within the group. For example, if terminal A is the master terminal within a group in group-based sidelink communication, terminal A can obtain the group ID information in advance as identification information for the group. That is, the group ID may be the group ID that terminal A already possesses.

[0339] Another example is that the group ID can be the ID of terminal A. That is, the ID of terminal A itself can be the group ID. In this case, the ID of terminal A is included in the sidelink assignment (SA) and the indicated ID is "n SA ID (sidelink group destination identity) is also acceptable, but is not limited to this.

[0340] As another example, the ID of terminal A is derived from N by terminal A. X ID It is possible. In this case, as an example, N X ID The decimal number of the CRC of PSCCH related to PSSCH is as shown in [Equation 5] below, but is not limited to this. Here, p i can be each parity bit, and L can be the number of parity bits.

[0341]

number

[0342] As a concrete example, we can consider the case where the SL PRS ID is based on 12 bits, like the existing DL PRS ID. In this case, for example, the group ID that the terminal already has may be 9 bits, and the ID included in the SA and indicated as the ID of terminal A is "n SA ID Even in this case, the ID can be 9 bits. That is, the group ID can be 9 bits. On the other hand, the ID of terminal A is derived from terminal A. X ID If N X ID is a modular function as modular 2 9 Based on 9 bits or modular 2 10It can be configured with 10 bits based on this. For example, as mentioned above, the group ID can be configured with 9 bits or 10 bits. In this case, since the SL PRS ID is configured with 12 bits as before, if the group ID is 9 bits, the terminal ID within the group can be 3 bits. On the other hand, if the group ID is 10 bits, the terminal ID within the group can be 2 bits. In other words, the SL PRS ID is configured with 12 bits as before, and the number of bits in the terminal ID within the group can be adjusted based on the number of bits in the group ID.

[0343] As a specific example, if the group ID is 10 bits, the group terminal ID values ​​for terminal A, terminal B, and terminal C can be configured as 00, 01, and 10 respectively, using 2 bits, but this is not limited to this. Also, as an example, if the group ID is 9 bits, the group terminal ID values ​​for terminal A, terminal B, and terminal C can be configured as 000, 001, and 010 respectively, using 3 bits, but this is not limited to this.

[0344] Another example is that the SL PRS ID can be constructed based on 9+N bits. In this case, 9 bits may be the group ID and N bits may be the terminal IDs within the group. For example, in relation to the SL PRS ID, as mentioned above in [Equation 4], it can be divided into 1024 based on modular 1024, so it can be constructed with 9+N bits. For example, as mentioned above, the existing group ID of terminal A can be used as the group ID, or the ID included in SA and indicated as the ID of terminal A can be "n SA ID If this is the case, the group ID can be a 9-bit ID. Also, N X ID In this case, it is a modular function called modular 2 9Based on this, the group ID can be constructed with 9 bits. In this case, the N bits for the group terminal ID can be an integer of 2 or more. That is, the group terminal ID value for terminal A can be 00, the group terminal ID value for terminal B can be 01, and the group terminal ID value for terminal C can be 10, and so on, consisting of 2 bits, but it is not limited to this. Also, as an example, the group terminal ID value for terminal A can be 000, the group terminal ID value for terminal B can be 001, and the group terminal ID value for terminal C can be 010, and so on, consisting of 3 bits, but it is not limited to this.

[0345] Another example is that the SL PRS ID can be constructed based on 16+N bits. In this case, 16 bits may be the group ID, and N bits may be the terminal IDs within the group. For example, in the aforementioned [Equation 4] related to the SL PRS ID, it can be divided into 1024 based on modular 1024, so it can also be constructed with 16+N bits.

[0346] For example, the group ID is the aforementioned N X ID In this case, it is a modular function called modular 2 16 Based on this, the group ID can be constructed with 16 bits. In this case, the N bits for the terminal ID within the group can be an integer of 2 or more. That is, the terminal ID value for terminal A can be 00, the terminal ID value for terminal B can be 01, and the terminal ID value for terminal C can be 10, and so on, consisting of 2 bits, but it is not limited to this. Also, as an example, the terminal ID value for terminal A can be 000, the terminal ID value for terminal B can be 001, and the terminal ID value for terminal C can be 010, and so on, consisting of 3 bits, but it is not limited to this.

[0347] Another example is setting the SL PRS ID to N X ID It can be configured based on +N bits. In this case, the group ID is N. XID can be used as it is, and the N bits can be the in-group terminal IDs. At this time, as an example, since it is divided into 1024 based on modular 1024 in [Equation 4] described above in relation to the SL PRS ID, N X ID can also be composed of + N bits.

[0348] As an example, the group ID can be the aforementioned N X ID can be used as it is. At this time, the N bits as the in-group terminal ID can be an integer of 2 or more. That is, the in-group terminal ID value for terminal A can be 00, the in-group terminal ID value for terminal B can be 01, and the in-group terminal ID value for terminal C can be 10, and it can be composed of 2 bits, but it is not limited to this. Also, as an example, the in-group terminal ID value for terminal A can be 000, the in-group terminal ID value for terminal B can be 001, and the in-group terminal ID value for terminal C can be 010, and it can be composed of 3 bits, but it is not limited to this.

[0349] As another example, when configuring the SL PRS ID, the group ID can be used as the ID for terminal A, as described above. Here, as an example, for each terminal in relation to the SL PRS ID, N X ID can be configured and used individually. As an example, in FIGS. 15 to 23 described above, each N for terminal A, terminal B, and terminal C X ID can be configured individually. That is, the SL PRS sequence for each terminal can be derived through [Equation 4] described above based on N for each terminal. At this time, N for each terminal X ID is calculated based on modular 2 as a modular function X ID and can be applied to [Equation 4] described above. As another example, N for each terminal 16 is calculated based on modular 2 as a modular function X IDThis can be applied to the aforementioned [Equation 4] without applying modular functions, and is not limited to the embodiments described above.

[0350] Furthermore, as an example, existing systems may not support multiple DL PRS settings for their positioning frequency layer (Player). That is, only one positioning frequency layer could be used with the same OFDM (Orthogonal Frequency Division Multiplexing) symbol. However, to reduce latency and improve device efficiency, the new system can support up to four positioning frequency layers for DL ​​PRS. This is just one example, however, and it is possible to increase the number of positioning frequency layers further; the system is not limited to the embodiments described above.

[0351] Furthermore, one or more DL PRS resource sets can be configured within the positioning frequency layer. For example, one or two DL PRS resource sets can be configured for one TRP (Transmission Reception Point). As a more specific example, if there are 18 TRPs and one DL PRS resource set is configured for each TRP, there may be a total of 18 DL PRS resource sets, but this is just an example and is not limited to the embodiments described above. In addition, one or more DL PRS resources can be configured within each DL PRS resource set. For example, one or more beams can be considered within a TRP, and DL PRS resources can correspond to each beam. As a more specific example, if the number of beams considered for a particular TRP in FR (Frequency Range) 2 is 64, the DL PRS resource set will contain 64 DL PRS resources corresponding to each beam, but this is just an example and is not limited to the embodiments described above.

[0352] Here, the parameters for the DL PRS resource set are as shown in Table 14 below, and the parameters for the DL PRS resource are as shown in Table 15 below, but are not limited to these.

[0353] [Table 14]

[0354] [Table 15]

[0355] In this case, as an example, the allocation information for SL PRS may include resource information for SL PRS transmission, as described above. As an example, consider the case where allocation information A for SL PRS A, allocation information B for SL PRS B, and allocation information C for SL PRS C are configured. In this case, as an example, each of allocation information A, allocation information B, and allocation information C may be generated based on the parameters in the aforementioned "DL PRS resource set" and the "DL PRS resource". That is, as allocation information for SL PRS, resource information may be generated based on DL PRS resource information. In this case, as an example, the parameters for the "SL PRS resource set" can be configured based on the parameters in the "DL PRS resource set". Here, as an example, the "SL PRS resource set" for each of allocation information A, allocation information B, and allocation information C may be the same. Therefore, the parameters in the "SL PRS resource set" for each of allocation information A, allocation information B, and allocation information C may have the same values. That is, in the SL PRS-related operation based on Figures 15 to 23 described above, the resource sets included in each allocation information may be the same. Furthermore, as an example, the parameters of "SL PRS resource" can be set based on the parameters in "DL PRS resource". Here, some of the parameters in "SL PRS resource" for each of allocation information A, allocation information B, and allocation information C may have different values. For example, some of the parameters in "SL PRS resource" for each of allocation information A, allocation information B, and allocation information C will be set to the same value, but some values ​​may be set to different values ​​considering each SL PRS.However, the "SL PRS resource set" and "SL PRS resource" for each of the allocation information A, allocation information B, and allocation information C can be configured for each of the allocation information A, allocation information B, and allocation information C, regardless of whether the parameter values ​​are the same or not.

[0356] Another example is the allocation information A+B+C mentioned above. Here, allocation information A+B+C can be constructed based on allocation information A, allocation information B, and allocation information C, as mentioned above. In this case, as a specific example, allocation information A+B+C can be constructed based on allocation information A. In this case, allocation information A+B+C may be pre-defined or instructed only for configurations that differ from allocation information A for each of allocation information B and allocation information C, based on allocation information A. As a specific example, in relation to allocation information A+B+C, the parameters included in the aforementioned "SL PRS resource set" may all be the same for allocation information A, allocation information B, and allocation information C. Therefore, allocation information A+B+C can also be constructed based on the same "SL PRS resource set". On the other hand, in the case of "SL PRS resource", some values ​​may be configured to be the same for each of allocation information A, allocation information B, and allocation information C, while some values ​​may be configured to be different. In this case, allocation information A+B+C can be further instructed only for parameters that differ from allocation information A. For example, if a specific parameter within "SL PRS resource" has different values ​​for each of allocation information A, allocation information B, and allocation information C, then allocation information A+B+C can contain three different parameter values. Conversely, if a specific parameter within "SL PRS resource" has the same value for each of allocation information A, allocation information B, and allocation information C, then allocation information A+B+C can contain one identical parameter value.

[0357] As another example, if a specific parameter within "SL PRS resource" has different values ​​for allocation information A, allocation information B, and allocation information C, then allocation information A+B+C may contain a single parameter value based on allocation information A, and only the difference compared to allocation information B and allocation information C may be pre-defined.

[0358] As a concrete example, the aforementioned SL PRS sequence ID ("SL-PRS-SequenceId") can be considered as a specific parameter within the "SL PRS resource." In this case, for example, the group ID may be the same in allocation information A, allocation information B, and allocation information C, and only the terminal IDs within the group may differ. In this case, allocation information A+B+C can contain one group ID and three terminal IDs within the group, thereby allowing for efficient configuration of allocation information.

[0359] As another example, the respective offset values ​​can be considered as "SL-PRS-ReOffset," "SL-PRS-ResourceSlotOffset," and "SL-PRS-ResourceSymbolOffset." In this case, it is possible to consider the case where some of the aforementioned offset values ​​are the same and some are different. That is, for allocation information A, allocation information B, and allocation information C, it is possible to consider the case where only one or more of the resource element offset, slot offset, and symbol offset are different, and the rest are the same. In this case, allocation information A+B+C can include only one parameter for the same offset, and parameters for each terminal for the different offsets.

[0360] As another example, the aforementioned SL PRS sequence ID ("SL-PRS-SequenceId") can be considered as a specific parameter within the "SL PRS resource". In this case, for example, the group ID may be the same in allocation information A, allocation information B, and allocation information C, and only the terminal ID within the group may differ. In this case, allocation information A+B+C can be constructed based on allocation information A. For example, the group ID is the same based on terminal A, and only one parameter can be transmitted. On the other hand, the terminal ID within the group may differ in allocation information A, allocation information B, and allocation information C, and can be indicated based on 0, 1, 2... in a pre-defined manner. That is, allocation information A+B+C can be indicated based on allocation information A, only for the differences, in a pre-defined manner, and is not limited to the aforementioned manner.

[0361] As another example, the respective offset values ​​can be considered as "SL-PRS-ReOffset," "SL-PRS-ResourceSlotOffset," and "SL-PRS-ResourceSymbolOffset." In this case, it is possible to consider the case where some of the aforementioned offset values ​​are the same and some are different. That is, for allocation information A, allocation information B, and allocation information C, it is possible to consider the case where only one or more of the resource element offset, slot offset, and symbol offset are different, and the rest are the same. In this case, allocation information A+B+C can contain only one parameter for the same offsets based on allocation information A. On the other hand, for different offsets, allocation information A+B+C can specify only the difference values, such as 0, offset1, offset2, etc., based on a pre-defined method using allocation information A as the basis. That is, allocation information A+B+C can specify only the differences based on allocation information A using a pre-defined method, and is not limited to the aforementioned method.

[0362] Figure 27 is a flowchart showing a method for performing side link positioning as applied to this disclosure.

[0363] Referring to Figure 27, a first terminal and at least one other terminal may exist within the base station's coverage. At this time, the first terminal and each of the at least one other terminal may be in an RRC-connected state with the base station, but are not limited to this. At this time, for example, the position of the second terminal can be measured based on sidelink-based positioning. At this time, for example, the first terminal may receive assignment information for the first terminal and each of the at least one other terminal from the base station (S2710). At this time, the assignment information may be the same as that described in Figure 16 above. Furthermore, for example, each of the at least one other terminal may obtain its own assignment information from the base station, as described above. Subsequently, the first terminal may transmit the assignment information for the first terminal and each of the at least one other terminal to the second terminal (S2720). Subsequently, the first terminal transmits an SL PRS to the second terminal based on the assignment information (S2730). At this time, each of the at least one other terminal may also transmit an SL PRS to the second terminal based on its own assignment information. Subsequently, the second terminal can perform measurements based on the received SL PRS and report them to the first terminal. That is, the first terminal can receive measurement information from the second terminal (S2740). Subsequently, the first terminal can report the measurement information to the base station (S2750), as described above.

[0364] Figure 28 is a flowchart showing a method for performing side link positioning as applied to this disclosure.

[0365] Referring to Figure 28, the first terminal can be located within the coverage of the base station. For example, the first terminal may be in an RRC-connected state with the base station, but is not limited to this. In this case, the position of the second terminal can be measured based on sidelink-based positioning. For example, the first terminal can receive assignment information for itself and at least one other terminal from the base station (S2810). In this case, the assignment information may be the same as that described in Figure 20 above. Also, for example, the first terminal can transmit the assignment information for at least one other terminal to each of those terminals (S2820). Subsequently, the first terminal transmits its own assignment information and the assignment information for at least one other terminal to the second terminal (S2830). Subsequently, the first terminal transmits an SL PRS to the second terminal based on the assignment information (S2840). In this case, each of at least one other terminal can also transmit an SL PRS to the second terminal based on its own assignment information. Subsequently, the second terminal can perform measurements based on the received SL PRS and report them to the first terminal. That is, the first terminal can receive measurement information from the second terminal (S2850). Subsequently, the first terminal can report the measurement information to the base station (S2860), as described above.

[0366] Figure 29 is a flowchart showing a method for performing sidelink positioning as applied to this disclosure. Referring to Figure 29, a terminal can generate allocation information without the control of a base station. At this time, the position of a second terminal can be measured based on sidelink-based positioning. As an example, a first terminal can generate allocation information for the first terminal and for at least one or more terminals. At this time, the allocation information may be the same as that described in Figure 24 above. Here, the first terminal can transmit the allocation information for at least one or more terminals to each of the at least one or more terminals (S2910). Subsequently, the first terminal transmits the allocation information for the first terminal and the allocation information for at least one or more terminals to the second terminal (S2920). Subsequently, the first terminal transmits an SL PRS to the second terminal based on the allocation information (S2930). At this time, each of the at least one or more terminals can also transmit an SL PRS to the second terminal based on its respective allocation information. Subsequently, the second terminal can perform measurements based on the received SL PRS and report them to the first terminal. In other words, the first terminal can receive measurement information from the second terminal (S2940).

[0367] Figure 30 shows a base station device and a terminal device to which this disclosure can be applied.

[0368] The base station device 3000 may include a processor 3020, an antenna unit 3012, a transceiver 3014, and a memory 3016.

[0369] The processor 3020 performs baseband-related signal processing and may include a higher-level processing unit 3030 and a physical-level processing unit 3040. The higher-level processing unit 3030 can process the operation of the MAC (Medium Access Control) layer, the RRC (Radio Resource Control) layer, or higher layers. The physical-level processing unit 3040 can process the operation of the physical (PHY) layer (e.g., uplink received signal processing, downlink transmitted signal processing). In addition to performing baseband-related signal processing, the processor 3020 can also control the overall operation of the base station equipment 3000.

[0370] The antenna unit 3012 may include one or more physical antennas, and if it includes multiple antennas, it can support MIMO (Multiple Input Multiple Output) transmission and reception. The transceiver 3014 may include a radio frequency (RF) transmitter and an RF receiver. The memory 3016 can store information processed by the processor 3020, software related to the operation of the base station equipment 3000, an operating system, applications, etc., and may include components such as buffers.

[0371] The processor 3020 of the base station 3000 can be configured to implement the operation of the base station in the embodiment described in the present invention.

[0372] The terminal device 3050 may include a processor 3070, an antenna unit 3062, a transceiver 3064, and a memory 3066. For example, in the present invention, the terminal device 3050 can communicate with a base station device 3000. Another example is that in the present invention, the terminal device 3050 can perform side-link communication with other terminal devices. That is, the terminal device 3050 of the present invention refers to a device that can communicate with at least one of the base station device 3000 and other terminal devices, and is not limited to communication with a specific device.

[0373] The processor 3070 performs baseband-related signal processing and may include a higher-level processing unit 3080 and a physical-level processing unit 3090. The higher-level processing unit 3080 can process MAC layer, RRC layer, or higher-level layer operations. The physical-level processing unit 3090 can process PHY layer operations (e.g., downlink received signal processing, uplink transmitted signal processing). In addition to performing baseband-related signal processing, the processor 3070 can also control the overall operation of the terminal device 3050.

[0374] The antenna unit 3062 may include one or more physical antennas, and if it includes multiple antennas, it can support MIMO transmission and reception. The transceiver 3064 may include an RF transmitter and an RF receiver. The memory 3066 can store information processed by the processor 3070, software related to the operation of the terminal device 3050, an operating system, applications, etc., and may include components such as buffers. As an example, the operations described in Figures 1 to 29 above can be performed based on the base station 3000 and the terminal device 3050, and are not limited to any particular embodiment.

[0375] The various embodiments of this disclosure are not intended to enumerate all possible combinations, but rather to illustrate representative aspects of this disclosure. The matters described in the various embodiments may be applied independently or in combination of two or more.

[0376] Furthermore, various embodiments of this disclosure can be implemented by hardware, firmware, software, or a combination thereof. In the case of hardware implementation, it can be implemented by one or more ASICs (Application Specific Integrated Circuits), DSPs (Digital Signal Processors), DSPDs (Digital Signal Processing Devices), PLDs (Programmable Logic Devices), FPGAs (Field Programmable Gate Arrays), general-purpose processors, controllers, microcontrollers, microprocessors, etc.

[0377] The scope of this disclosure includes software or machine-executable instructions (e.g., operating systems, applications, firmware, programs, etc.) that enable operation in various embodiments to be performed on a device or computer, and non-transitory computer-readable medium on which such software or instructions are stored and executable on the device or computer. [Industrial applicability]

[0378] The following points can also be applied to other systems.

Claims

1. A method for side link positioning in a wireless communication system, Steps include: the first wireless user device receiving first assignment information from a base station related to the sidelink positioning reference signaling of the first wireless user device; The first wireless user device receives second assignment information related to sidelink positioning reference signaling of at least one second wireless user device; The step of the at least one second wireless user device receiving the second assignment information related to the sidelink positioning reference signaling of the at least one second wireless user device from the base station; The first wireless user device transmits information related to the first assignment information to the target wireless user device; The first wireless user device transmits information related to the second assignment information to the target wireless user device; The first wireless user device transmits a first sidelink positioning reference signal (SL PRS) to the target wireless user device based on the first assignment information; The steps of the at least one second wireless user device transmitting at least one second SL PRS to the target wireless user device based on the second assignment information; and The first wireless user device includes the step of receiving measurement information related to sidelink positioning reference signaling from the target wireless user device, The aforementioned measurement information is: First SL PRS measurement related to the first SL PRS; and A method based on at least one second SL PRS measurement associated with the at least one second SL PRS.

2. The method according to claim 1, wherein the measurement information includes a measured value or position value obtained by the first SL PRS measurement and a measured value or position value obtained by at least one second SL PRS measurement.

3. The method according to claim 1, further comprising the step of determining the estimated position of the target wireless user device based on the measurement information.

4. The determination of the estimated position of the target wireless user device is: Time of arrival (TOA); Time difference of arrival (TDOA); Angle of arrival (AoA); or The method according to claim 3, further based on at least one of the round trip time (RTT).

5. The determination of the estimated position of the target wireless user device is: Location information of the first wireless user device; and The method according to claim 3, further based on the location information of at least one second wireless user device.

6. The method according to claim 1, further comprising the step of the first wireless user device transmitting the measurement information to the base station.

7. The method according to claim 1, wherein the measurement information includes instructions related to the estimated location of the target wireless user device.

8. The method according to claim 1, wherein the first allocation information includes at least one sidelink resource for the transmission of the first SL PRS by the first wireless user device.

9. The information relating to the first assignment information is at least one: At least a portion of the first allocation information (at least part); or Includes assignment information generated based on the first assignment information, and The information relating to the second assignment information is at least one: At least a portion of the second allocation information (at least part); or The method according to claim 1, comprising assignment information generated based on the second assignment information.

10. The method according to claim 1, wherein the target wireless user device is configured to receive the at least one second SL PRS from the at least one second wireless user device based on the second assignment information.

11. The method according to claim 1, wherein the second allocation information includes at least one sidelink resource for the transmission of the at least one second SL PRS by the at least one second wireless user device.

12. The method according to claim 1, further comprising the step of the first wireless user device receiving a request for SL PRS transmission from the target wireless user device.

13. A method for side link positioning in a wireless communication system, The step of a target wireless user device receiving first assignment information from a first wireless user device related to the sidelink positioning reference signaling of the first wireless user device; The step of the target wireless user device receiving second assignment information related to sidelink positioning reference signaling of at least one second wireless user device; Step 1: Based on the first assignment information, the target wireless user device receives a first sidelink positioning reference signal (SL PRS) from the first wireless user device; The steps of the target wireless user device receiving at least one second SL PRS from the at least one second wireless user device based on the second assignment information; and The step includes the target wireless user device transmitting measurement information related to sidelink positioning reference signaling to the first wireless user device, The aforementioned measurement information is: First SL PRS measurement related to the first SL PRS; and The method according to claim 1, based on at least one second SL PRS measurement associated with the at least one second SL PRS.

14. The method according to claim 13, wherein the measurement information includes a measured value or position value obtained by the first SL PRS measurement and a measured value or position value obtained by at least one second SL PRS measurement.

15. The method according to claim 13, further comprising the step of the target wireless user device receiving an instruction from the first wireless user device for the estimated location of the target wireless user device based on the measurement information.

16. The estimated location of the target wireless user device is: Time of arrival (TOA); Time difference of arrival (TDOA); Angle of arrival (AoA); or The method according to claim 15, further based on at least one of the round trip time (RTT).

17. The estimated location of the target wireless user device is: Location information of the first wireless user device; and The method according to claim 15, further based on the location information of at least one second wireless user device.

18. The method according to claim 13, further comprising the step of the target wireless user device transmitting a request for SL PRS transmission to the first wireless user device.

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