Method for sidelink positioning in a wireless communication system - Patents.com

Abstract

A method and apparatus for performing positioning based on a sidelink positioning reference signal in a wireless communication system. [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 from a base station, where one or more terminals receive the allocation information from the base station and transmit the allocation information received by the first terminal to a second terminal; a step of a first terminal receiving a sidelink sounding reference signal (SL SRS) from a second terminal, where one or more terminals receive the SL SRS transmitted from the second terminal and perform measurements based on the received SL SRS; and a step of transmitting measurement information acquired based on the measurements to the base station, where one or more terminals perform measurements based on the SL SRS to acquire measurement information and transmit the acquired measurement information to the base station.

Description

[Technical field]

[0001] The present disclosure relates to a method and apparatus for performing positioning based on a sounding reference signal (SRS) in a wireless communication system. [Background technology]

[0002] Device-to-Device (D2D) communication refers to a direct communication between a terminal and another terminal. Direct communication means that a terminal communicates with another terminal through the control of a network or at the discretion of the terminal itself, without going through other network devices.

[0003] Such communication between terminals can be applied to vehicle communication, which is commonly called V2X (vehicle-to-everything). V2X communication refers to a communication method in which information such as traffic conditions is exchanged or shared by communicating with road infrastructure and other vehicles while driving. V2X-based services can include, for example, autonomous driving services, vehicle remote control services, interactive services such as games, and large-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 technologies required for the Long Term Evolution (LTE) and New Radio (NR) systems, which are the radio access technologies (RATs) within the 5G system, are currently under discussion. Summary of the Invention [Problem to be solved by the invention]

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

[0005] Another technical problem of the present disclosure relates to a method and apparatus for providing allocation information based on whether a sidelink can be formed between terminals.

[0006] Yet another technical problem of the present disclosure relates to a method and apparatus for configuring allocation information for a sounding reference signal (SRS).

[0007] Furthermore, another technical problem of the present disclosure relates to a method and apparatus for configuring sequence information of allocation information for SRS.

[0008] Furthermore, another technical problem of the present disclosure relates to a method and apparatus for configuring resource information of allocation information for SRS.

[0009] The technical problems to be achieved by the present disclosure are not limited to the above-mentioned technical problems, and other technical problems not mentioned will be clearly understood by a person having ordinary skill in the art to which the present 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 embodiment of the present disclosure may include a step of a first terminal receiving allocation information from a base station, where each of the at least one or more terminals receives the allocation information from the base station and transmits the allocation information received by the first terminal to a second terminal; a step of the first terminal receiving a sidelink sounding reference signal (SL SRS) from the second terminal, where each of the at least one or more terminals receives the SL SRS transmitted from the second terminal and performs measurement based on the received SL SRS; and a step of transmitting measurement information acquired based on the measurement to the base station, where each of the at least one or more terminals performs measurement based on the SL SRS to acquire measurement information, and transmits the acquired measurement information to the base station.

[0011] In addition, 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 from a base station; a step of transmitting the allocation information received by the first terminal to a second terminal and each of at least one or more terminals; a step of the first terminal receiving an SL SRS transmitted from the second terminal; a step of the first terminal performing measurement based on the SL SRS received by the first terminal to obtain measurement information, wherein each of the at least one or more terminals performs measurement based on the SL SRS to obtain the measurement information, and the first terminal obtaining the measurement information from the at least one or more terminals; and a step of transmitting the obtained measurement information to the base station.

[0012] In addition, 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 generating allocation information; a step of transmitting the allocation information generated by the first terminal to a second terminal and at least one or more terminals; a step of the first terminal receiving an SL SRS transmitted from the second terminal; and a step of the first terminal performing measurements based on the SL SRS received to obtain measurement information, wherein each of the at least one or more terminals performs measurements based on the SL SRS to obtain the measurement information, and the first terminal obtains the measurement information from the at least one or more terminals. Effect of the Invention

[0013] According to the present disclosure, there is provided a method and apparatus for performing sidelink positioning in a wireless communication system.

[0014] According to the present disclosure, it is possible to provide a method and apparatus for providing allocation information based on whether a sidelink can be formed between terminals.

[0015] According to the present disclosure, a method and apparatus for configuring allocation information for an SRS can be provided.

[0016] According to the present disclosure, a method and apparatus for configuring sequence information of allocation information for SRS can be provided.

[0017] According to the present disclosure, a method and apparatus for configuring resource information of allocation information for SRS can be provided.

[0018] The effects obtained by the present disclosure are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those having ordinary skill in the art to which the present disclosure pertains from the following description. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 illustrates an example of a V2X scenario to which the present disclosure may be applied. [Diagram 2] FIG. 1 illustrates an example of a V2X scenario to which the present disclosure may be applied. [Diagram 3] FIG. 1 illustrates an example of a V2X scenario to which the present disclosure may be applied. [Figure 4] A diagram showing an example of a service provided based on a side link to which the present disclosure can be applied. [Diagram 5] A diagram for explaining an NR frame structure to which the present disclosure can be applied. [Figure 6] FIG. 1 illustrates an NR resource structure to which the present disclosure may be applied. [Figure 7] 1 illustrates an example of a V2X resource pool configuration to which the present disclosure may be applied. [Figure 8] 1 illustrates an example of a V2X resource pool configuration to which the present disclosure may be applied. [Figure 9] FIG. 1 illustrates a method for performing position measurement based on Observed Time Difference Of Arrival (OTDOA) to which the present disclosure can be applied. [Figure 10] FIG. 1 is a diagram showing the configuration of a control plane and a user plane for NR positioning protocol (NRPP) related to the present invention to which the present disclosure can be applied. [Figure 11]FIG. 2 illustrates a method for performing localization based on SL SRS to which the present disclosure can be applied. [Figure 12] FIG. 13 illustrates a method for performing positioning based on SL SRS on the basis of request information to which the present disclosure can be applied. [Figure 13] FIG. 2 illustrates a method for performing localization based on SL SRS to which the present disclosure can be applied. [Figure 14] FIG. 13 illustrates a method for performing positioning based on SL SRS on the basis of request information to which the present disclosure can be applied. [Figure 15] FIG. 2 illustrates a method for performing localization based on SL SRS to which the present disclosure can be applied. [Figure 16] FIG. 13 illustrates a method for performing positioning based on SL SRS on the basis of request information to which the present disclosure can be applied. [Figure 17] 1 is a flowchart illustrating a method for performing localization based on SL SRS to which the present disclosure may be applied. [Figure 18] 1 is a flowchart illustrating a method for performing localization based on SL SRS to which the present disclosure may be applied. [Figure 19] 1 is a flowchart illustrating a method for performing localization based on SL SRS to which the present disclosure may be applied. [Figure 20] 1 is a diagram illustrating a base station device and a terminal device to which the present disclosure can be applied. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present disclosure will be described in detail below with reference to the accompanying drawings so that those skilled in the art can easily carry out the present disclosure. However, the present disclosure may be embodied in various different forms and is not limited to the embodiments described herein.

[0021] In describing the embodiments of the present disclosure, if it is determined that a detailed description of a known configuration or function would obscure the gist of the present disclosure, the detailed description will be omitted. In addition, in the drawings, parts that are not related to the description of the present disclosure are omitted, and similar parts are designated by similar reference numerals.

[0022] In this disclosure, when a certain component is said to be "connected," "coupled," or "connected" to another component, this includes not only a direct connection, but also an indirect connection where there is another component between them. Furthermore, when a certain component is said to "include" or "have" another component, this does not exclude the other component, but means that the other component may be further included, unless otherwise specified.

[0023] In this disclosure, the terms "first", "second", etc. are used only for the purpose of distinguishing a certain component from other components, and do not limit the order or importance between the components, unless otherwise specified. Therefore, 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 one another are used to clearly describe the characteristics of each component, and do not necessarily mean that the components are separate. That is, multiple components may be integrated into one hardware or software unit, or one component may be distributed into multiple hardware or software units. Therefore, even if not specifically mentioned, such integrated or distributed embodiments are also included in the scope of this disclosure.

[0025] In the present disclosure, the components described in the various embodiments are not necessarily essential components, and some may be optional components. Therefore, an embodiment consisting of a subset of the components described in one embodiment is also included in the scope of the present disclosure. Note that an embodiment including other components in addition to the components described in the various embodiments is also included in the scope of the present disclosure.

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

[0027] It is clear that various operations performed for communication with a terminal in a network consisting of multiple network nodes including a base station may be performed by the base station or other network nodes other than the base station. A "base station (BS)" may be replaced with terms such as a fixed station, Node B, eNodeB (eNB), ng-eNB, gNodeB (gNB), and an access point (AP). Also, a "terminal" may be replaced with terms such as a user equipment (UE), a mobile station (MS), a mobile subscriber station (MSS), a subscriber station (SS), and a non-AP station (non-AP STA).

[0028] In this disclosure, transmitting or receiving a channel includes 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] 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 will be used to distinguish the system to which various examples of the present disclosure are applied from existing systems, but the scope of the present disclosure is not limited by these terms.

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

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

[0056] For example, the 5G sidelink field can include both sidelink in the LTE system and sidelink technology in the NR system. Here, the sidelink field can be essential for performance improvement through ultra-high reliability and ultra-low latency, and for incorporation into new and diverse services.

[0057] For convenience of explanation, the operation and related information for V2X will be described below based on the NR system. However, the features of the embodiments of the present disclosure are not limited to a specific system, but can be similarly applied to other systems similarly realized, and are not limited to the exemplary system to which the embodiments of the present disclosure are applied.

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

[0059] More specifically, in relation to existing communication technologies, communication from a base station to a terminal may be a downlink, and communication from a terminal to a base station may be an uplink. Communication between terminals may be necessary as well as communication between a base station and a terminal, and communication from terminal to terminal may be a sidelink. For example, in relation to V2X, communication between vehicles or communication between a vehicle and another object (an object other than a base station, such as a pedestrian terminal (P-UE) or a terminal-type roadside unit (UE-type RSU (roadside unit))) may be a sidelink. That is, in the case of performing vehicle-based communication, it is possible to develop and apply a sidelink technology by going beyond the limitations of communication between a terminal and a base station.

[0060] 1 to 3 are diagrams illustrating examples of V2X scenarios to which the present disclosure may be applied.

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

[0062] For example, in the description of V2X, the terminal may be a vehicle. In the description of V2X, the terminal and the vehicle are collectively referred to as a terminal. For example, the terminal may refer to a device capable of communicating with a sidelink and a base station, and may include a vehicle for V2X.

[0063] In addition, in relation to V2X, D2D (Device to Device) may mean communication between terminals. ProSe may mean a proximity service for a terminal performing D2D communication. SL (sidelink) may be a sidelink, and SCI (Sidelink Control Information) may mean control information related to the sidelink. PSSCH (Physical Sidelink Shared Channel) may be a channel through which data is transmitted via the sidelink, and PSCCH (Physical Sidelink Control Channel) may be a channel through which control information is transmitted via the sidelink. PSBCH (Physical Sidelink Broadcast Channel) is a channel for transmitting signals via the sidelink in a broadcast manner and may transmit system information. PSFICH (Physical Sidelink Feedback Indication Channel) is a sidelink feedback channel and may be a channel used for indicating feedback information. SLSS (Sidelink Synchronization Signal) may be a synchronization signal for the sidelink, and PSSID (Physical Sidelink Synchronization Identity) may be ID information for sidelink synchronization. n SA ID (Sidelink group destination identity) is ID information for distinguishing sidelink groups, and N SL ID(Physical sidelink synchronization identity) may be ID information for sidelink synchronization. V2V may mean communication between vehicles, V2P may mean communication between vehicles and pedestrians, and V2I / N may 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 terminal may be SA. When used in sidelink communication, these control information may be SCI. Here, the SCI may be transmitted through the PSCCH. Also, a part of the SCI may be transmitted through the PSCCH, and the other part may be transmitted through the PSSCH.

[0065] In V2X communication, data transmitted from one terminal to another terminal can be set in units of TB, where sidelink data can be transmitted via PSSCH.

[0066] Next, in this disclosure, operation modes may be defined by resource allocation schemes for control information and data transmission for V2X communication or direct link (e.g., D2D, ProSe, or SL) communication.

[0067] For example, the base station resource scheduling mode may be a resource allocation mode in which a base station (e.g., gNodeB, eNodeB) or a relay node schedules resources used by a terminal 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 a relay node may provide a sidelink (or direct link) transmission terminal with sidelink (or direct link) control information and / or scheduling information for resources used for data transmission through downlink control information (DCI). Thus, the sidelink (or direct link) transmission terminal transmits sidelink (or direct link) control information and data to the sidelink (or direct link) receiving terminal, and the sidelink (or direct link) receiving terminal receives sidelink (or direct link) data based on the sidelink (or direct link) control information.

[0069] In addition, the UE autonomous resource selection mode may be a resource allocation mode in which the UE selects resources to be used by the UE to transmit control information and data. The UE's resource selection may be determined by sensing of the UE in a resource pool (i.e., a set of resource candidates). The UE may transmit V2X (or direct link) control information and / or data on the selected resources.

[0070] As a specific example, a sidelink (or direct link) transmitting terminal transmits sidelink (or direct link) control information and data to a sidelink (or direct link) receiving terminal using resources selected by itself, and the sidelink (or direct link) receiving terminal receives sidelink (or direct link) data based on the sidelink (or direct link) control information.

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

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

[0073] For convenience of explanation, the embodiments of the present disclosure will be described based on V2X communication, but the present disclosure is not limited thereto. For example, the present invention can be similarly applied to communication based on a direct link such as D2D and ProSe.

[0074] Furthermore, V2X may be a term that collectively refers to V2V, V2P, and V2I / N. Here, V2V, V2P, and V2I / N may be defined as shown in Table 1, but are not limited thereto. That is, Table 1 below is merely an example and is not limited thereto.

[0075] [Table 1]

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

[0077] Table 2 and Figure 1 may be scenarios that support V2X operation based only on the PC5 interface (or SL). Here, Figure 1 (a) may be V2V operation, (b) may be V2I operation, and (c) may be V2P operation. That is, Figure 1 may be a method of communication based on sidelink, and communication can be performed without a base station.

[0078] [Table 2]

[0079] Table 3 and Figure 2 may be scenarios that support V2X operation based only on the Uu interface (i.e., the interface between the UE and the base station). For example, Figure 2 (a) may show V2V operation, (b) may show V2I ​​operation, and (c) may show 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 be scenarios supporting V2X operation using both the Uu interface and the PC5 interface (or SL), where Figure 3(a) may show scenario 3A of Table 4 and Figure 3(b) may show scenario 3B of Table 4.

[0082] Referring to FIG. 3(a), a terminal can transmit a V2X message to other terminals through a sidelink. Any of the terminals that receive the V2X message can transmit the V2X message to a base station through an uplink. The base station can receive the V2X message and transmit a message based on the message to other terminals in the vicinity through a downlink. For example, the downlink can be performed through a broadcast method.

[0083] Referring to FIG 3(b), a terminal transmits a V2X message to a base station through an uplink, and the base station can transmit the message to at least one terminal, RSU, etc. Then, the terminal or RSU that receives the message can transmit the message to multiple surrounding terminals through a sidelink.

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

[0085] [Table 4]

[0086] As mentioned above, V2X communication may be performed via a base station or through direct communication between terminals. When performed via a base station, LTE-based V2X communication can transmit and receive through a Uu link, which is a communication interface between an LTE base station and a terminal. When a side link is used as direct communication between terminals, LTE-based V2X communication can transmit and receive through a PC5 link, which is a communication interface between LTE terminals.

[0087] For example, even in the NR system, V2X communication can be performed using communication between a terminal and a base station and a sidelink between the terminals. Here, there may be differences between the communication (uplink / downlink) between a base station and a terminal in the NR system and the communication (uplink / downlink) between a base station and a terminal in the existing system. For example, some features may be similar, and there may be parts that are changed based on the NR system, which is a new system. Furthermore, there may also be differences between the sidelink in the existing system and the sidelink in the NR system. That is, in consideration of the above-mentioned difference in communication between the base station and the terminal, there may also be parts that are changed in the NR system, which is a new system.

[0088] FIG. 4 is a diagram illustrating an example of a service provided based on a sidelink to which the present disclosure can be applied.

[0089] Referring to FIG 4, a V2X-related service or an Internet of Things (IoT) service may be provided based on a 5G sidelink. Here, the 5G sidelink may be a concept including both a sidelink based on an existing LTE system and a sidelink taking into account an NR system. That is, the 5G sidelink service may include a service provided in consideration of one or more of the sidelinks applied to each of the LTE and NR systems.

[0090] For example, referring to FIG. 4, in relation to the V2X service, platooning, automatic driving, advanced sensor, and remote driving services can be provided. Here, platooning may be a technology in which a plurality of vehicles dynamically form a group and operate in a similar manner. Furthermore, autonomous driving may be a technology in which vehicles drive based on full automation or semi-automation. Furthermore, advanced sensor may be a technology in which data acquired from sensors or video images are collected and exchanged. Furthermore, remote driving may be a technology related to technology and applications for remote control of vehicles. That is, the above-mentioned services can be provided as services based on V2X. However, these services are merely examples, and services to which the present disclosure is applicable are not limited to the specific services described above. Here, in order to provide various V2X services, requirements such as ultra-low latency, ultra-connectivity, low power, high reliability, etc. may be required. Therefore, V2X services and operation methods for satisfying the requirements therefor may be required in the 5G sidelink, and examples of the present disclosure will be described below in consideration of these requirements.

[0091] The physical resource structure of the NR system is described below.

[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 time domain in NR is T c =1 / (Δf max N f ), and Δf max =480 10 3 and N f = 4096, whereas the time domain base unit in LTE is Ts = 1 / (Δf ref N f,ref ), and Δf ref =15 10 3 and N f,ref= 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 =64.

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

[0095] Referring to FIG. 5, N TA denotes the timing advance (TA) between the downlink (DL) and the 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 1].

[0096]

number

[0097] In [Number 1], N TA,offset is a TA offset value that occurs due to differences in duplex modes. Basically, in FDD (Frequency Division Duplex),TA、offset has a value of 0, but in TDD (Time Division Duplex), N is set to 0 taking into account the margin for DL-UL switching time. TA,offset can be defined as a fixed value of

[0098] FIG. 6 is a diagram illustrating an NR resource structure to which the present disclosure can be applied.

[0099] The resource elements (REs) in the resource grid can be indexed by each subcarrier spacing, where one resource grid can be generated for each antenna port and each subcarrier spacing, and uplink and downlink transmission and reception can be based on the resource grid.

[0100] In the frequency domain, one resource block (RB) consists of 12 REs, and an index (n PRB ) can be configured. The index for the RB can be utilized within a specific frequency band or system bandwidth. The index for the RB can be defined as follows: RB sc denotes the number of subcarriers per 1 RB, and k denotes the subcarrier index.

[0101]

number

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

[0103] New neurology 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 to solve the problem of not being able to use wide bandwidth in existing frequency ranges or carriers such as 700 MHz and 2 GHz, although the scope of this disclosure is not limited thereto.

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

[0105] [Table 5]

[0106] Referring to Table 5, the neural network can be defined based on the subcarrier spacing (SCS), cyclic prefix (CP) length, and number of OFDM symbols per slot used in an OFDM (Orthogonal Frequency Division Multiplexing) system. The above values ​​can be provided to the UE through upper layer parameters DL-BWP-mu and DL-BWP-cp for the downlink and through upper layer parameters UL-BWP-mu and UL-BWP-cp for the uplink.

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

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

[0109] For example, in LTE, data may be transmitted based on a transmission time interval (TTI), which is a unit time, and the TTI may be set in units of one or more subframes. Here, in LTE, one subframe may be set to 1 ms and may include 14 OFDM symbols (or 12 OFDM symbols).

[0110] Furthermore, a non-slot can be defined in NR. A non-slot can mean a slot having a number of symbols smaller than that of a normal slot by at least one symbol. For example, when providing a low delay time such as a URLLC service, the delay time can be shortened through a non-slot having a number of symbols smaller than that of a normal slot. Here, the number of OFDM symbols included in a non-slot can be determined in consideration of a frequency range. For example, in a frequency range of 6 GHz or more, a non-slot having a length of 1 OFDM symbol can be considered. As a further example, the number of OFDM symbols defining a non-slot can include at least two 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 (for example, normal slot length - 1). However, the number of OFDM symbols may be limited to 2, 4, or 7 symbols as a standard of a non-slot, but is not limited thereto.

[0111] Also, for example, in an unlicensed band below 6 GHz, subcarrier spacing where u is 1 and 2 can be used, and in an unlicensed band above 6 GHz, subcarrier spacing where u is 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 slot symb ), number of slots per frame (N frame,u slot ), the number of slots per subframe (N subframe,u slot ) Table 6 shows the above values ​​based on a normal slot having 14 OFDM symbols.

[0114] [Table 7]

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

[0116] Furthermore, as described above, one subframe may correspond to 1 ms on the time axis. Furthermore, one slot may correspond to 14 symbols on the time axis. For example, one slot may correspond to 7 symbols on the time axis. Thus, the number of slots and symbols that can be considered within 10 ms that corresponds to one radio frame may be set differently. Table 8 may show the number of slots and the number of symbols according to each SCS. In Table 8, the SCS of 480 kHz may not be considered, but is not limited to these examples.

[0117] [Table 8]

[0118] 7 and 8 show examples of V2X resource pool configuration to which the present disclosure can be applied.

[0119] With reference to FIG. 7 and FIG. 8, a method of configuring a resource pool for a control channel (PSCCH) on which a scheduling assignment (SA) is transmitted in V2X and a data channel (PSSCH) on which data related thereto is transmitted will be described. Here, a resource pool may be a set of resource candidates available for 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 pool as illustrated in FIG. 7 and FIG. 8 may be a resource pool for a V (Vehicle)-UE in V2X. Also, the resource pool configuration method as illustrated in FIG. 7 and FIG. 8 is merely an example, and a resource pool may be configured in other manners.

[0120] The resource pools as illustrated in FIGS. 7 and 8 can be defined in a terminal autonomous resource selection mode (or mode 2).

[0121] Meanwhile, in the base station resource scheduling mode (or mode 1), resources corresponding to all sidelink slots in the time domain (e.g., corresponding to all uplink slots in NR) and all resource blocks RB in a V2X carrier or band in the frequency domain may be a set of resource candidates usable for transmission of SA and / or data. Furthermore, in the base station resource scheduling mode (or mode 1), a resource pool may be defined separately as in the terminal autonomous resource selection mode (or mode 2), and a set of resource candidates usable for transmission of the SA and / or data may be set.

[0122] That is, the resource pool according to the present disclosure described with reference to FIGS. 7 and 8 may be defined in a terminal autonomous resource selection mode (or mode 2) and / or a base station resource scheduling mode (or mode 1).

[0123] In the following, a slot pool, which corresponds to a resource pool in the time domain, will be specifically described.

[0124] Regarding the resource pool, slots in which the resource pool is set in the time domain are shown in Fig. 7. As shown in Fig. 7, the slots for the resource pool for V2X may be indicated and defined as a bitmap repeated for all slots except for a specific slot. The slots for the resource pool for V2X may be slots in which transmission and / or reception of SA and / or data is permitted for the resource pool in V2X.

[0125] Here, the slots excluded from the bitmap repetition application may include slots used for transmitting sidelink signal blocks (SSBs) including a primary sidelink synchronization signal (PSSS), a secondary sidelink synchronization signal (SSSS), and a physical sidelink broadcast channel (PSBCH). 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 above examples.

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

[0127] In addition, the repeatedly applied bitmap can be indicated by higher layer signaling such as RRC (the "slot indication of resource pool" signaling field shown in FIG. 7). When the bitmap value is 1, it indicates a slot for a resource pool, and when it is 0, it indicates a slot not belonging to the resource pool. Here, the u value in FIG. 7 is a value according to SCS (Subcarrier Spacing) and can follow the values ​​defined in Tables 5 to 7.

[0128] Next, a resource block pool corresponding to a resource pool in the frequency domain will be specifically described.

[0129] Regarding the resource pool, slots in which the resource pool is set in the frequency domain are shown in Figure 8. As shown in Figure 8, in the resource pool, the PSCCH for transmitting SA and the PSSCH for transmitting data can be simultaneously transmitted in one sub-channel, and the PSSCH can be transmitted over the entire sub-channel. In contrast, the PSCCH can be transmitted over a portion of the sub-channel.

[0130] As shown in FIG. 8, in a slot where a resource pool is set in the time domain for V2X, all RBs (RB#0 to RB#N UL RB -1)) can be defined in units of one RB (where N UL RB is the total number of RBs corresponding to the system bandwidth for the uplink (UL), and since V2X for the sidelink is defined in the UL band, UL is replaced with SL (i.e., N UL RB Instead of N SL RB The "Starting RB of sub-channels" signaling field can be indicated by higher layer signaling such as RRC. Contiguous RBs corresponding to a total of K sub-channels from the RB indicated by "Starting RB of sub-channels" belong to the resource pool. Here, the number of RBs constituting one sub-channel can be indicated by a "Sub-channel size" signaling field, and the number of the K sub-channels can be indicated by a "Number of sub-channels" signaling field through higher layer signaling such as RRC.

[0131] For example, "Sub-channel size" N subchannel The number of RBs may be, but is not limited to, 10, 15, 20, 25, 50, 75, or 100, and 4, 5, or 6 RBs may also be used. Note that, as shown in FIG. 8, the PSCCH for SA allocated to a portion of a subchannel may be allocated to X RBs in the subchannel, where X≦N. subchannel It is.

[0132] The positioning technology applied below is based on LTE (Long Term Evolution) and is being further improved by using NR (New Radio) wireless technology. For commercial use, it includes technology to meet a maximum error of 3 m indoors and 10 m outdoors for 80% of users within coverage. For this purpose, various technologies such as time-of-arrival and departure / arrival angle-based technologies for downlink and / or uplink are being considered.

[0133] In the downlink-based method, a time-based technique is the DL-TDOA (Time Difference of Arrival) method, and an angle-based technique is the DL-AoD (Angle of Departure) method. As an example, when estimating the position of a terminal based on DL-TDOA, the arrival time difference of signals transmitted at different transmission points is calculated, and the terminal position can be estimated based on the arrival time difference value and the position information of each transmission point. As another example, when estimating the position of a terminal based on DL-AoD, the terminal position can be estimated by checking the angle of departure of a signal transmitted to the terminal and checking the direction in which the signal is transmitted based on the position of the transmission point.

[0134] In addition, in the uplink-based method, a time-based technique is the UL-TDOA (Time Difference of Arrival) method, and an angle-based technique is the DL-AoA (Angle of Arrival) method. For example, when estimating the position of a terminal based on UL-TDOA, the time difference between when a signal transmitted from the terminal arrives at each transmission point is calculated, and the terminal's position can be estimated based on the arrival time difference value and the position information of each transmission point. For example, when estimating the position of a terminal based on DL-AoA, the terminal's position can be estimated by checking the angle of arrival of a signal transmitted from the terminal and checking the direction in which the signal is transmitted based on the position of the transmission point.

[0135] Further, downlink and uplink based methods include a multi-cell Round-Trip Time (RTT) method, an RTT method between one or more adjacent gNodeBs and / or Transmission Reception Points (TRPs) for NR downlink and uplink positioning, and an Enhanced Cell ID (E-CID) method. As an example, when estimating the location of a terminal using multi-cell RTT, it may be possible to estimate the location of the terminal through location information of multiple cells by measuring the time (i.e., RTT) at which a response is received after a signal is transmitted in multiple cells. In addition, it may be possible to estimate the location of the terminal by checking the RTT signal from the gNodeB and / or TRP. In addition, when estimating the location of a terminal based on E-CID, it may be possible to estimate the location of the terminal through cell location information after measuring the angle of arrival and reception strength and checking each cell ID.

[0136] To realize the above technology, the LTE downlink-based PRS (Positioning Reference Signal) is being newly discussed as "DL PRS" modified according to the NR downlink structure. Additionally, for the uplink, the SRS (Sounding Reference Signal), an NR-based uplink reference signal that takes MIMO into account, is being developed into "SRS for positioning", an improved reference signal that takes positioning into account.

[0137] Furthermore, in order to provide an improved solution in relation to positioning operations, the requirements for high accuracy for horizontal and vertical position measurements, low latency, network efficiency (e.g., scalability, RS overhead, etc.) and terminal efficiency (e.g., power consumption, complexity, etc.) are additionally taken into consideration.

[0138] As an example, positioning operations may require high accuracy in consideration of IIoT scenarios, including downlink / uplink (DL / UL) position reference signals, signaling / procedures for improved accuracy, reduced latency, and methods for improving network and terminal efficiency.

[0139] As a result, work is being applied to improve the performance of NR-based positioning technologies for higher accuracy, lower latency, and network / device efficiency in commercial use cases such as IoT devices for smart homes and wearables, and in Industrial IoT (Inter of Things) use cases such as IoT devices in smart factories.

[0140] In relation to this, the aim is to improve accuracy to within a maximum error of 1m for commercial use cases and within a maximum error of 0.2m for IIoT use cases, and to further shorten the delay time from the current 100ms to within 10ms.

[0141] Here, an IIoT scenario considering indoor smart factory devices may be as shown in Table 9 below. As an example, Table 10 below may show settings for a simulation considering an IIoT scenario. Specifically, in Table 10, hall size, BS locations, and room height may be set considering an IIoT scenario such as a smart factory, and the transmission and reception operations of the base station may be confirmed based on the settings. However, this is merely an example and is not limited to the above settings.

[0142] Specifically, the IIoT scenario can consider cases where clutter is dense and cases where clutter is sparse in the internal environment. That is, it can be distinguished based on how many clusters exist in the internal environment. Also, in the IIoT scenario, it can be considered cases where the antenna height is higher or lower than the average height of the cluster. That is, the IIoT scenario can be as shown in Table 9 below, taking into account the above cases.

[0143] That is, 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 station 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 station are lower than the average antenna height of the cluster.

[0144] Meanwhile, InF-SH is a scenario that takes into account the case where clusters are not densely packed in an indoor factory environment such as a smart factory, and the transmission or reception antenna of the base station is higher than the average antenna height of the cluster.In addition, InF-DH is a scenario that takes into account the case where clusters are densely packed in an indoor factory environment such as a smart factory, and the transmission and reception antenna of the base station is higher than the average antenna height of the cluster.

[0145] Additionally, InF-HH is a scenario that takes into account the case where both the transmitting and receiving antennas of the base station are higher than the average antenna height of the cluster, regardless of whether the clusters are densely packed in an indoor factory environment such as a smart factory.

[0146] Here, the term "cluster" refers to a form in which base stations are arranged in a concentrated manner at regular intervals in a certain space. As an example, a cluster can be realized with 18 base stations as shown in Table 10 in an internal environment, but this is only an example and is not limited to this.

[0147] As mentioned above, the reason why factors such as cluster density and antenna height between base stations and clusters were taken into consideration in the scenario is that these factors may change radio wave characteristics and interference, which may lead to slight changes in positioning technology to meet various performance requirements for positioning (accuracy, latency, network / terminal efficiency, etc.).

[0148] However, in actual applications, a common positioning technology that can cover all the requirements in the five scenarios can be applied, and the positioning technology mentioned in the present invention below can also be applied to all the five scenarios. That is, it is possible to apply the positioning technology described later in this disclosure to all IIoT devices that operate based on NR in an indoor factory environment such as a smart factory to perform positioning.

[0149] [Table 9]

[0150] [Table 10]

[0151] In the following, a method for generating a PRS will be described taking into account the positioning requirements in light of the aforementioned IIoT scenarios and new applications.

[0152] FIG. 9 is a diagram illustrating a method for performing position measurement based on Observed Time Difference Of Arrival (OTDOA) to which the present disclosure can be applied.

[0153] OTDOA may be a method of measuring a location by tracking signals transmitted to a ground station through a communication satellite in an LTE and / or NR system. That is, OTDOA is based on measuring the arrival time difference of radio signals transmitted at various locations. As an example, a plurality of cells may transmit a reference signal (RS) and a terminal may receive it. Since the distance between each of the plurality of cells and the terminal's location is different, the arrival time at which the terminal receives the reference signal transmitted from each of the plurality of cells may be different. Here, the terminal may calculate the time difference for the signal received from each cell and transmit the calculated information to the network. The network may combine the time difference with antenna position information of each cell to calculate the terminal's location. Here, at least three cells may be used for terminal location measurement.

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

[0155] FIG. 10 is a diagram showing the configuration of the control plane and the user plane for the NR positioning protocol (NRPP) related to the present invention to which the present disclosure may be applied. As an example, the positioning technology may 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). At this time, the above-mentioned positioning technology may simultaneously support the control plane and the user plane positioning solutions. The LTE and / or NR network-based positioning function may be mainly controlled by the Location Management Function (LMF). Here, the control plane positioning and the user plane positioning may be performed through the LMF. The LMF is controlled at the network end and may be linked to the base station through a mobility entity (e.g., AMF (Access and Mobility Management Function)). As an example, the LMF may correspond to a location server (location server) described later in this disclosure.

[0156] As another example, the LTE and / or NR network-based positioning function may be mainly controlled by an E-SMLC (Evolved-Serving Mobile Location Centre) / SLP (Secure User Plane Location) SUPL (Location Platform) based on the LTE positioning protocol (LPP). Here, positioning can be performed in the control plane through the E-SMLC and in the user plane through the SLP, each of which can be controlled at the network end and linked through a base station and a mobility entity (e.g., a Mobility Management Entity (MME)).

[0157] As an example, in an LTE system, positioning is performed through positioning estimation based on a downlink based on a time difference, or through positioning estimation based on a cell ID. In an NR system, positioning can be performed by considering positioning estimation based on a downlink (e.g., PRS) and positioning estimation based on an uplink (e.g., SRS for positioning). In addition, the positioning can be performed based on a signal exchange time for multiple cells in round trip time (RTT) or based on a cell ID. In addition, the positioning can be performed based on a signal reception time difference. In addition, since communication is performed based on beams in the new communication system, positioning can be performed based on an angle difference between each beam. The operations of downlink / uplink reference signals and terminals / base stations based on the above 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 may be the transmission time difference of the reference signal, and RTOA may be the relative time value at which the signal arrives. Positioning can be performed based on the location information of the transmission point by calculating a relative time difference value based on the location of the transmission point that transmitted the reference signal and the transmission time difference. Also, 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. It is possible to check whether the positioning operation is possible by checking the strength and quality of the received reference signal through RSRP and RSRQ. Also, the RRM can perform resource management and check resources for positioning.

[0169] Also, as an example, the uplink reference signal for positioning may be set as the SRS for positioning. However, this is merely a name for convenience of explanation and is not limited to the above-mentioned embodiment. In addition, it may be applied to a newly proposed communication system by changing the name to a different one, and may be applied in a form changed according to the new communication system.

[0170] As a specific example, an SRS for positioning operation can be generated in an NR system. Here, the number of SRS symbols can be 1, 2, or 4 for "SRS for MIMO (Multi Input Multi Output)". At this time, in the case of SRS for positioning, more SRS may be required, so the number of SRS symbols can be 1, 2, 4, 8, or 12. The position of the SRS symbol can be from the end of the slot to the Nth symbol (N=0, 1...13). That is, the SRS symbol may be assigned based on the end of the slot. As an example, the number of SRS combs can be 2, 4, or 8, which will be described later. Furthermore, as an example, an offset can be applied in SRS mapping, which can be as shown in Table 13 below.

[0171] [Table 13]

[0172] TIFF2025501159000017.tif101170

[0173]

number

[0174]

number

[0175]

number

[0176] According to the present invention, the number of SRSs can be set to various values ​​such as 2, 4, or 8. For example, in the case of an LTE system, the number of SRSs can be set to 4, and 12 CSs can be used based on this. The number of SRSs according to the present invention can be set by applying different numbers depending on the system to which it is applied.

[0177] Considering the SRS for positioning in the new communication system according to the present invention, if the kombu size is 2, the maximum number of CSs can be 8. Also, if the kombu size is 4, the maximum number of CSs can be 12. Also, since the SRS can be used for positioning, a kombu size of 8 can be considered.

[0178] For example, the SRS for positioning may support only one antenna port. The SRS for positioning does not support frequency hopping, and the frequency axis allocation may support 4 PRB to 272 PRB in units of 4 PRB. Furthermore, in the case of the SRS for positioning, aperiodic SRS may be supported in the same manner as the aperiodic SRS. Information regarding the antenna port, frequency hopping, frequency allocation, and period may be indicated through upper end signaling.

[0179] For SRS for positioning, requirements must be met taking into account IIoT scenarios and use cases, which may require methods to increase orthogonality or reduce overhead.

[0180] For this purpose, the number of symbols of the SRS for positioning may be 1, 2, 4, 8, or 12. Furthermore, the comb size for positioning may be 2, 4, or 8. Here, the SRS may be a sequence based on phase prefixing with a Zadov-Chu sequence. In this case, CS may be a value for phase prefixing, and each phase-prefixed value based on the CS value may maintain orthogonality.

[0181] As an example, the terminal may configure parameters for the SRS for positioning based on higher layer signaling. Specifically, the terminal may configure the SRS through an SRS resource set for positioning (e.g., "SRS-PosResourceSet-r16") as a higher layer parameter. Here, the SRS resource set parameter for positioning may include an SRS resource set ID parameter for positioning (e.g., srs-PosResourceSetId-r16). At this time, the SRS resource set ID parameter (e.g., srs-PosResourceSetId-r16) may include a resource set ID. Furthermore, the SRS resource set parameter for positioning may include an SRS resource list parameter for positioning (e.g., srs-PosResourceIdList-r16). At this time, the SRS resource list parameter for positioning may include a list related to resource IDs in the SRS resource set. Furthermore, the SRS resource set parameter for positioning may include a resource type parameter (e.g., resourceType-r16). At this time, the SRS resource set parameter for positioning may include information on whether the resource is aperiodic, semi-persistent, or periodic. In addition, the SRS resource set parameter for positioning may include a path loss related parameter for positioning (e.g., pathlossReferenceRS-Pos-r16). Here, the path loss related parameter for positioning may include information on a reference signal to be referenced in relation to path loss. For example, the reference signal to be referenced may be at least one of the SSB of the serving cell and the SS path loss L PRS of the neighbor cell, and the information may be included in the path loss related parameter for positioning.

[0182] Also, the terminal may set the SRS resource based on the SRS resource parameter for positioning (e.g., SRS-PosResource-r16) in the upper layer parameter. Here, the SRS resource parameter for positioning may include an SRS resource ID parameter for positioning (e.g., srs-PosResourceId-r16). At this time, the SRS resource ID parameter for positioning may include an SRS resource set. Furthermore, the SRS resource parameter for positioning may include a transmission comb parameter (e.g., transmissionComb-r16). At this time, the transmission comb parameter may include information related to the comb to be transmitted. As an example, the comb size may be any of 2, 4, and 8. As a specific example, the transmission comb parameter may indicate a comb offset (combOffset) and a cyclic prefix (combOffset) value when the comb size is 2. As another example, the transmission comb parameter may indicate a comb offset (combOffset) and a cyclic prefix (combOffset) value when the comb size is 4. Further, as an example, the transmit comb parameters may indicate combOffset and combOffset values ​​when the comb size is 8.

[0183] Furthermore, the SRS resource parameters for positioning may include a resource mapping parameter (e.g., resourceMapping-r16). Here, the resource mapping parameter may indicate an SRS transmission start symbol within a slot. In this case, the transmission start symbol may be 0 to 13. Furthermore, the resource mapping parameter may indicate the number of symbols. For example, the number of symbols may be any of 1, 2, 4, 8, and 12.

[0184] The SRS resource parameters for positioning may include a frequency domain shift parameter (e.g., freqDomainShift-r16). In this case, the frequency domain shift parameter may be information related to a starting resource block (RB) in the frequency domain. For example, the RB may be 0 to 268.

[0185] In addition, the SRS resource parameter for positioning may include a group or sequence hopping parameter (e.g., groupOrSequenceHopping-r16), which may include information on whether to perform group hopping, sequence hopping, both hopping, or neither hopping for the SRS sequence.

[0186] Further, the SRS resource parameters for positioning may include a resource type parameter (e.g., resourceType-r16). In this case, the resource type parameter may include information on whether the resource is aperiodic, semi-persistent, or periodic. As an example, if the resource is aperiodic, the resource type parameter may include slot offset information. As another example, if the resource is semi-static or periodic, the resource type parameter may include period and offset information.

[0187] In addition, the SRS resource parameter for positioning may include a sequence ID parameter (e.g., sequenceId-r16), where the sequence ID parameter may include SRS sequence ID information.

[0188] Furthermore, the SRS resource parameters for positioning may include SRS spatial relation parameters (e.g., SRS-SpatialRelationInfoPos-r16). In this case, the SRS spatial relation parameters may include information on a reference signal to be referenced in relation to a spatial relation. For example, the reference signal to be referenced may be at least one of an SSB of a serving cell, an SSB of a neighboring cell, and a DL PRS. In addition, when an SSB is a reference signal to be referenced, the SRS spatial relation parameters may further include cell ID and SSB index information.

[0189] As an example, a method and apparatus for performing positioning using a sidelink in a new communication system (e.g., NR) may be provided. As an example, a terminal performing sidelink communication may perform sidelink communication based on at least one of in-coverage, out-of-coverage, and partial coverage. Further, as an example, the sidelink communication may support vehicle to everything (V2X), public safety, commercial services, and Industrial Internet of Things (IIoT), as described above.

[0190] Further, as an example, positioning based on sidelink may be performed. In this case, the positioning may 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 thereto. As another example, measurements for sidelink positioning may be used in combination with measurements for other RAT-based positioning (e.g., Uu based measurements), and are not limited to a specific embodiment.

[0191] Further, by way of example, when performing sidelink positioning based on a new system, it is necessary to determine signal design, resource allocation, measurements, related procedures and other matters from a physical layer perspective for reference signals for sidelink positioning, as will be described later. Further, by way of example, a method is possible to recycle existing reference signals and reference signal related procedures for sidelink positioning, as will be described later. Based on the above, a method for performing sidelink based positioning is described below.

[0192] FIG. 11 illustrates a method for performing sidelink based localization applicable to the present disclosure.

[0193] Referring to Fig. 11, sidelink-based positioning may be performed. As a specific example, in Fig. 11, terminal A 1120, terminal B 1130, and terminal C 1140 may be present within the coverage of base station 1110. As an example, but not limited to, each of terminal A 1120, terminal B 1130, and terminal C 1140 may be in an RRC-connected state with base station 1110. At this time, the location of terminal D 1150 may be measured based on sidelink-based positioning.

[0194] Here, as an example, sidelink communication may be possible between terminal A 1120 and terminal D 1150. As another example, terminal A 1120, terminal B 1130, terminal C 1140, and terminal D 1150 may perform group communication-based sidelink communication based on groupcast. As an example, terminal A 1120 may be a master terminal in the group communication, but is not limited to the above embodiment.

[0195] For convenience of explanation, the following description will be given based on the above-mentioned situation as an example, but is not limited thereto. Referring to FIG. 11, a base station 1110 may transmit allocation information to a terminal A 1120, a terminal B 1130, and a terminal C 1140. At this time, the allocation information may be information required for a terminal D 1150 requiring positioning to transmit a sidelink sounding reference signal (SL SRS). As an example, the allocation information may include at least one of resource and sequence information required for the terminal D 1150 to transmit the SL SRS, and may further include other information.

[0196] At this time, for example, the allocation information may be transmitted from the base station 1110 to each of the terminal A 1120, the terminal B 1130, and the terminal C 1140 by higher layer signaling (e.g., RRC). Here, for example, the allocation information may be assigned by a location server, and the assigned information may be transmitted to each terminal through the base station 1110, and is not limited to a specific embodiment.

[0197] Then, terminal A 1120 may transmit the allocation information to terminal D 1150. Here, the allocation information may be information necessary for terminal D 1150 to transmit the SL SRS. At this time, as an example, terminal A 1120, terminal B 1130, and terminal C 1140 may each receive the SL SRS transmitted by terminal D 1150. At this time, as an example, terminal A 1120 may transmit the allocation information to terminal D 1150 via at least one of a physical sidelink control channel (PSCCH) and a physical sidelink shared channel (PSSCH), and is not limited to a specific embodiment. Then, terminal D 1150 may transmit the SL SRS, and terminal A 1120, terminal B 1130, and terminal C 1140 may each receive the SL SRS transmitted by terminal D 1150.

[0198] Then, each of terminal A 1120, terminal B 1130, and terminal C 1140 may perform measurement based on the SL SRS to obtain measurement information. Then, each of terminal A 1120, terminal B 1130, and terminal C 1140 may transmit the measurement information to base station 1110. At this time, the measurement information is a value measured by each terminal based on the SL SRS, and may be at least one of a time difference of arrival (TDOA) and a reference signal time difference (RSTD), but is not limited thereto. As an example, terminal A 1120, terminal B 1130, and terminal C 1140 may each transmit measurement values ​​to base station 1110. Then, base station 1110 may obtain a location value of terminal D 1150 based on the measurement values ​​received from each terminal. As another example, the measurement information may be a location value of terminal D 1150 calculated based on the SL SRS transmitted by terminal D 1150. That is, the measurement information may be the measurement value itself or a location value of terminal D 1150 derived based on the measurement value, and is not limited to a specific form. Further, by way of example, but not limitation, the base station 1110 can further transmit the measurement information to a location server, and can perform positioning as described above.

[0199] FIG. 12 illustrates a method for performing sidelink based localization applicable to the present disclosure.

[0200] Referring to Fig. 12, sidelink-based positioning may be performed. As a specific example, in Fig. 12, terminal A 1220, terminal B 1230, and terminal C 1240 may be present within the coverage of base station 1210. As an example, terminal A 1220, terminal B 1230, and terminal C 1240 may each be in an RRC-connected state with base station 1210, but is not limited thereto. At this time, the location of terminal D 1250 may be measured based on sidelink-based positioning.

[0201] Here, as an example, sidelink communication may be possible between terminal A 1220 and terminal D 1250. As another example, terminal A 1220, terminal B 1230, terminal C 1240, and terminal D 1250 may perform group communication-based sidelink communication based on groupcast. As an example, terminal A 1220 may be a master terminal in the group communication, but is not limited to the above embodiment.

[0202] For convenience of explanation, the following description will be given based on the above-mentioned situation as an example, but is not limited thereto. Referring to FIG. 12, the terminal D 1250 may transmit request information to the terminal A 1220. At this time, the request information may be information requesting location measurement of the terminal D 1250. Then, the terminal A 1220 may transmit request information to the base station 1210 based on the request information acquired from the terminal D 1250. Here, as an example, the base station 1210 may transmit the received request information to a location server, but is not limited to the above-mentioned embodiment.

[0203] Then, the base station 1210 may transmit allocation information of the SL SRS to each terminal based on the request information. As another example, the base station 1210 may receive allocation information for the SL SRS from the location server based on the request information and transmit the allocation information based on the received information, and is not limited to the above embodiment.

[0204] Then, base station 1210 may transmit allocation information to terminal A 1220, terminal B 1230, and terminal C 1240. In this case, the allocation information may be information necessary for terminal D 1250 requiring positioning to transmit the SL SRS. As an example, the allocation information may include at least one of resource and sequence information necessary for terminal D 1250 to transmit the SL SRS, but may further include other information.

[0205] At this time, for example, the allocation information may be transmitted from the base station 1210 to each of the terminals A 1220, B 1230, and C 1240 by higher layer signaling (e.g., RRC). Here, for example, the allocation information may be assigned by a location server, and the assigned information may be transmitted to each terminal through the base station 1210, and is not limited to a specific embodiment.

[0206] Then, the terminal A 1220 may transmit the allocation information to the terminal D 1250. Here, the allocation information may be information necessary for the terminal D 1250 to transmit the SL SRS. At this time, as an example, the terminal A 1220, the terminal B 1230, and the terminal C 1240 may each receive the SL SRS transmitted by the terminal D 1250. At this time, as an example, the terminal A 1220 may transmit the allocation information to the terminal D 1250 via at least one of a physical sidelink control channel (PSCCH) and a physical sidelink shared channel (PSSCH), and is not limited to a specific embodiment. Then, the terminal D 1250 may transmit the SL SRS, and each of the terminal A 1220, the terminal B 1230, and the terminal C 1240 may receive the SL SRS transmitted by the terminal D 1250.

[0207] Then, each of the terminal A 1220, the terminal B 1230, and the terminal C 1240 may perform measurement based on the SL SRS to obtain measurement information. Then, each of the terminal A 1220, the terminal B 1230, and the terminal C 1240 may transmit the measurement information to the base station 1210. At this time, the measurement information is a value measured by each terminal based on the SL SRS, and may be at least one of TDOA and RSTD, but is not limited thereto. As an example, the terminal A 1220, the terminal B 1230, and the terminal C 1240 may transmit the measurement values ​​to the base station 1210. Then, the base station 1210 may obtain the location value of the terminal D 1250 based on the measurement values ​​received from each terminal. As another example, the measurement information may be the location value of the terminal D 1250 calculated based on the SL SRS transmitted by the terminal D 1250. That is, the measurement information may be the measurement value itself or the location value of the terminal D 1250 derived based on the measurement value, and is not limited to a specific form. Further, by way of example, but not limitation, the base station 1210 can further transmit the measurement information to a location server, and positioning can be performed as described above.

[0208] FIG. 13 illustrates a method for performing sidelink based positioning applicable to the present disclosure.

[0209] Referring to Fig. 13, sidelink-based positioning may be performed. As a specific example, in Fig. 13, a terminal A 1320 may be present within the coverage of a base station 1310. As an example, but not limited to, the terminal A 1320 may be in an RRC-connected state with the base station 1310. At this time, the location of the terminal D 1350 may be measured based on the sidelink-based positioning.

[0210] Here, as an example, sidelink communication may be possible between terminal A 1320 and terminal B 1330, sidelink communication may be possible between terminal A 1320 and terminal C 1340, and sidelink communication may be possible between terminal A 1320 and terminal D 1350. As another example, terminal A 1320, terminal B 1330, terminal C 1340, and terminal D 1350 may perform group communication-based sidelink communication based on groupcast. As an example, terminal A 1320 may be a master terminal in the group communication, but is not limited to the above-mentioned embodiment.

[0211] For convenience of explanation, the following description will be given based on the above-mentioned situation as an example, but is not limited thereto. Referring to FIG. 13, a base station 1310 may transmit allocation information to a terminal A 1320. At this time, the allocation information may be information required for a terminal D 1350 requiring positioning to transmit an SL SRS. As an example, the allocation information may include at least one of resource and sequence information required for the terminal D 1350 to transmit an SL SRS, and may further include other information.

[0212] At this time, as an example, the allocation information may be transmitted from the base station 1310 to the terminal A 1320 by higher layer signaling (e.g., RRC). At this time, since the terminal A 1320 is within the coverage of the base station 1310 and is in an RRC connected state, the terminal A 1320 may receive the allocation information from the base station 1310. Further, as an example, the allocation information may be allocated by a location server, and the allocated information may be transmitted to each terminal through the base station 1310, and the present invention is not limited to a specific embodiment.

[0213] Then, the terminal A 1320 may transmit the allocation information to each of the terminal B 1330 and the terminal C 1340. At this time, the allocation information may be information necessary for the terminal D 1350 requiring positioning to transmit the SL SRS. As an example, the allocation information may include at least one of resource and sequence information necessary for the terminal D 1350 to transmit the SL SRS, but may further include other information. That is, each of the terminal B 1330 and the terminal C 1340 may receive the above-mentioned allocation information from the terminal A 1320 in order to receive the SL SRS from the terminal D 1350. At this time, as an example, the terminal A 1320 may transmit the allocation information to each of the terminal B 1330 and the terminal C 1340 via at least one of the PSCCH and the PSSCH, and is not limited to a specific embodiment. Also, the terminal A 1320 may transmit the allocation information to the terminal D 1350. That is, the terminal A 1330 may transmit the allocation information as information necessary for the terminal D 1350 to transmit the SL SRS. At this time, as an example, terminal A 1320 may transmit allocation information to terminal D 1350 via at least one of a PSCCH and a PSSCH, and is not limited to a specific embodiment. Based on the above, terminal D 1350 may transmit an SL SRS, and terminal A 1320, terminal B 1330, and terminal C 1340 may each receive the SL SRS transmitted by terminal D 1350.

[0214] Thereafter, each of the terminal A 1320, the terminal B 1330, and the terminal C 1340 may perform measurement based on the SL SRS and obtain measurement information. At this time, each of the terminal B 1330 and the terminal C 1340 may transmit the measurement information to the terminal A 1320. At this time, the measurement information is a value measured by each terminal based on the SL SRS, and may be at least one of TDOA and RSTD, but is not limited thereto. As an example, the measurement information may be the measurement value itself or a location value of the terminal D 1350 derived based on the measurement value, and is not limited to a specific form. More specifically, the terminal A 1320 may obtain the measurement value measured based on the SL SRS from the terminal B 1330 and the terminal C 1340 as measurement information. At this time, the terminal A 1320 may obtain the location value of the terminal D 1350 based on the measurement value obtained from the terminal B 1330 and the terminal C 1340. At this time, the terminal A 1320 may transmit the location value of the terminal D 1350 to the base station 1310 as measurement information. At this time, the base station 1310 can report the measurement information as a location value of the terminal D 1350 to the location server, and is not limited to a specific embodiment.

[0215] As another example, terminal A 1320 may obtain measurement values ​​measured based on the SL SRS from terminal B 1330 and terminal C 1340 as measurement information. At this time, terminal A 1320 may transmit the measurement values ​​measured by terminal A 1320 based on the SL SRS together with the measurement values ​​obtained from terminal B 1330 and terminal C 1340 to base station 1310. At this time, base station 1310 may obtain a location value of terminal D 1350 based on the measurement values ​​of terminal A 1320, terminal B 1330, and terminal C 1340. As an example, base station 1310 may report measurement information as a location value of terminal D 1350 to a location server, and the present invention is not limited to a specific embodiment.

[0216] As another example, terminal A 1320 may obtain a location value of terminal D 1350 derived from measurements based on SL SRS from terminal B 1330 and terminal C 1340 as measurement information, and may be able to transmit the measurement information to base station 1310. As an example, base station 1310 may report the measurement information as a location value of terminal D 1350 to a location server, and is not limited to a specific embodiment. Positioning may be performed as described above.

[0217] FIG. 14 illustrates a method for performing sidelink based localization applicable to the present disclosure.

[0218] Referring to Fig. 14, sidelink-based positioning may be performed. As a specific example, in Fig. 14, terminal A 1420 may be present within the coverage of base station 1410. As an example, terminal A 1420 may be in an RRC-connected state with base station 1410, but is not limited thereto. At this time, the location of terminal D 1450 may be measured based on sidelink-based positioning.

[0219] Here, as an example, sidelink communication may be possible between terminal A 1420 and terminal B 1430, sidelink communication may be possible between terminal A 1420 and terminal C 1440, and sidelink communication may be possible between terminal A 1420 and terminal D 1450. As another example, terminal A 1420, terminal B 1430, terminal C 1440, and terminal D 1450 may perform group communication-based sidelink communication based on groupcast. As an example, terminal A 1420 may be a master terminal in the group communication, but is not limited to the above-mentioned embodiment.

[0220] For convenience of explanation, the following description will be given based on the above-mentioned situation as an example, but is not limited thereto. Referring to FIG. 14, the terminal D 1450 may transmit request information to the terminal A 1420. At this time, the request information may be information requesting location measurement of the terminal D 1450. Then, the terminal A 1420 may transmit request information to the base station 1410 based on the request information acquired from the terminal D 1450. Here, as an example, the base station 1410 may transmit the received request information to a location server, but is not limited to the above-mentioned embodiment.

[0221] Then, the base station 1410 may transmit allocation information of the SL SRS to each terminal based on the request information. As another example, the base station 1410 may receive allocation information for the SL SRS from the location server based on the request information and transmit the allocation information based on the received information, and is not limited to the above embodiment.

[0222] 14, a base station 1410 may transmit allocation information to a terminal A 1420. In this case, the allocation information may be information required for a terminal D 1450 requiring positioning to transmit an SL SRS. As an example, the allocation information may include at least one of resource and sequence information required for the terminal D 1450 to transmit an SL SRS, but may further include other information.

[0223] At this time, as an example, the allocation information may be transmitted from the base station 1410 to the terminal A 1420 by higher layer signaling (e.g., RRC). At this time, since the terminal A 1420 is within the coverage of the base station 1410 and is in an RRC connected state, the terminal A 1420 may receive the allocation information from the base station 1410. Further, as an example, the allocation information may be allocated by a location server, and the allocated information may be transmitted to each terminal through the base station 1410, and the present invention is not limited to a specific embodiment.

[0224] Then, the terminal A 1420 may transmit the allocation information to each of the terminal B 1430 and the terminal C 1440. At this time, the allocation information may be information necessary for the terminal D 1450 requiring positioning to transmit the SL SRS. As an example, the allocation information may include at least one of resource and sequence information necessary for the terminal D 1450 to transmit the SL SRS, but may further include other information. That is, each of the terminal B 1430 and the terminal C 1440 may receive the above-mentioned allocation information from the terminal A 1420 in order to receive the SL SRS from the terminal D 1450. At this time, as an example, the terminal A 1420 may transmit the allocation information to each of the terminal B 1430 and the terminal C 1440 via at least one of the PSCCH and the PSSCH, and is not limited to a specific embodiment. Also, the terminal A 1420 may transmit the allocation information to the terminal D 1450. That is, the terminal A 1420 may transmit the allocation information as information necessary for the terminal D 1450 to transmit the SL SRS. At this time, as an example, terminal A 1420 may transmit allocation information to terminal D 1450 via at least one of a PSCCH and a PSSCH, and is not limited to a specific embodiment. Based on the above, terminal D 1450 may transmit an SL SRS, and each of terminal A 1420, terminal B 1430, and terminal C 1440 may receive the SL SRS transmitted by terminal D 1450.

[0225] Thereafter, each of the terminal A 1420, the terminal B 1430, and the terminal C 1440 may perform measurement based on the SL SRS and obtain measurement information. At this time, each of the terminal B 1430 and the terminal C 1440 may transmit the measurement information to the terminal A 1420. At this time, the measurement information is a value measured by each terminal based on the SL SRS, and may be at least one of TDOA and RSTD, but is not limited thereto. As an example, the measurement information may be the measurement value itself or a location value of the terminal D 1450 derived based on the measurement value, and is not limited to a specific form. More specifically, the terminal A 1420 may obtain the measurement value measured based on the SL SRS from the terminal B 1430 and the terminal C 1440 as measurement information. At this time, the terminal A 1420 may obtain the location value of the terminal D 1450 based on the measurement value obtained from the terminal B 1430 and the terminal C 1440. At this time, the terminal A 1420 may transmit the location value of the terminal D 1450 to the base station 1410 as measurement information. At this time, the base station 1410 can report the measurement information as a location value of the terminal D 1450 to the location server, and is not limited to a specific embodiment.

[0226] As another example, terminal A 1420 may obtain measurement values ​​measured based on the SL SRS from terminal B 1430 and terminal C 1440 as measurement information. At this time, terminal A 1420 may transmit the measurement values ​​measured by terminal A 1420 based on the SL SRS together with the measurement values ​​obtained from terminal B 1430 and terminal C 1440 to base station 1410. At this time, base station 1410 may obtain a location value of terminal D 1450 based on the measurement values ​​of terminal A 1420, terminal B 1430, and terminal C 1440. As an example, base station 1410 may report measurement information as a location value of terminal D 1450 to a location server, and the present invention is not limited to a specific embodiment.

[0227] As another example, terminal A 1420 may obtain a location value of terminal D 1450 derived from measurements based on SL SRS from terminal B 1430 and terminal C 1440 as measurement information, and may be able to transmit the measurement information to base station 1410. As an example, base station 1410 may report the measurement information as a location value of terminal D 1450 to a location server, and is not limited to a specific embodiment. Positioning may be performed as described above.

[0228] FIG. 15 illustrates a method for performing sidelink based localization applicable to the present disclosure.

[0229] Referring to FIG. 15, sidelink-based positioning may be performed. As a specific example, in FIG. 15, positioning may be performed based on sidelink communication between terminals without the control of a base station. As an example, the location of terminal D 1540 may be measured based on sidelink-based positioning. Here, as an example, sidelink communication may be possible between terminal A 1510 and terminal B 1520, sidelink communication may be possible between terminal A 1510 and terminal C 1530, and sidelink communication may be possible between terminal A 1510 and terminal D 1540. As another example, terminal A 1510 may perform group communication-based sidelink communication based on groupcast. As an example, terminal A 1510 may be a master terminal in group communication, but is not limited to the above-mentioned embodiment. Note that, as an example, the following description will be based on the above-mentioned situation for convenience of explanation, but is not limited thereto. Referring to FIG. 15, terminal A 1510 may generate allocation information. At this time, the allocation information may be information necessary for terminal D 1540 requiring positioning to transmit SL SRS. As an example, the allocation information may include at least one of resources and sequence information required for the terminal D 1540 to transmit the SL SRS, but may further include other information.

[0230] At this time, as an example, the terminal A 1510 may transmit the allocation information to each of the terminal B 1520 and the terminal C 1530. In this case, the allocation information may be information required for the terminal D 1540 requiring positioning to transmit the SL SRS. As an example, the allocation information may include at least one of resource and sequence information required for the terminal D 1540 to transmit the SL SRS, but may further include other information. That is, each of the terminal B 1520 and the terminal C 1530 may receive the above-mentioned allocation information from the terminal A 1510 in order to receive the SL SRS from the terminal D 1540. At this time, as an example, the terminal A 1510 may transmit the allocation information to each of the terminal B 1520 and the terminal C 1530 via at least one of the PSCCH and the PSSCH, and is not limited to a specific embodiment. Also, the terminal A 1510 may transmit the allocation information to the terminal D 1540. That is, the terminal A 1510 may transmit the allocation information as information required for the terminal D 1540 to transmit the SL SRS. At this time, as an example, terminal A 1510 may transmit allocation information to terminal D 1540 via at least one of a PSCCH and a PSSCH, and is not limited to a specific embodiment. Based on the above, terminal D 1540 may transmit an SL SRS, and each of terminal A 1510, terminal B 1520, and terminal C 1530 may receive the SL SRS transmitted by terminal D 1540.

[0231] Thereafter, each of the terminal A 1510, the terminal B 1520, and the terminal C 1530 can perform measurement based on the SL SRS and obtain measurement information. At this time, each of the terminal B 1520 and the terminal C 1530 can transmit the measurement information to the terminal A 1510. At this time, the measurement information is a value measured by each terminal based on the SL SRS, and may be at least one of TDOA and RSTD, but is not limited thereto. As an example, the measurement information may be the measurement value itself or a location value of the terminal D 1540 derived based on the measurement value, and is not limited to a specific form. More specifically, the terminal A 1510 can obtain the measurement value measured based on the SL SRS from the terminal B 1520 and the terminal C 1530 as the measurement information. At this time, the terminal A 1510 can obtain the location value of the terminal D 1540 based on the measurement value obtained from the terminal B 1520 and the terminal C 1530.

[0232] As another example, terminal A 1510 may obtain, as measurement information, a location value of terminal D 1540 derived from measurements based on SL SRS from terminal B 1520 and terminal C 1530, and is not limited to a specific embodiment. Positioning may be performed as described above.

[0233] FIG. 16 illustrates a method for performing sidelink based localization applicable to the present disclosure.

[0234] Referring to FIG. 16, sidelink-based positioning may be performed. As a specific example, in FIG. 16, positioning may be performed based on sidelink communication between terminals without the control of a base station. As an example, the location of the terminal D 1640 may be measured based on sidelink-based positioning. Here, as an example, sidelink communication may be possible between the terminal A 1610 and the terminal B 1620, sidelink communication may be possible between the terminal A 1610 and the terminal C 1630, and sidelink communication may be possible between the terminal A 1610 and the terminal D 1640. As another example, the terminal A 1610 may perform group communication-based sidelink communication based on groupcast. As an example, the terminal A 1610 may be a master terminal in the group communication, but is not limited to the above-mentioned embodiment. Note that, as an example, the following description will be based on the above-mentioned situation for convenience of explanation, but is not limited thereto. Referring to FIG. 16, the terminal D 1640 may transmit request information to the terminal A 1610. At this time, the request information may be information requesting position measurement of the terminal D 1640, but is not limited to the above-mentioned embodiment.

[0235] Then, the terminal A 1610 may generate allocation information. At this time, the allocation information may be information necessary for the terminal D 1640 requiring positioning to transmit the SL SRS. As an example, the allocation information may include at least one of resource and sequence information necessary for the terminal D 1640 to transmit the SL SRS, but may further include other information.

[0236] At this time, as an example, the terminal A 1610 may transmit the allocation information to each of the terminal B 1620 and the terminal C 1630. In this case, the allocation information may be information required for the terminal D 1640 requiring positioning to transmit the SL SRS. As an example, the allocation information may include at least one of resource and sequence information required for the terminal D 1640 to transmit the SL SRS, but may further include other information. That is, each of the terminal B 1620 and the terminal C 1630 may receive the above-mentioned allocation information from the terminal A 1610 in order to receive the SL SRS from the terminal D 1640. At this time, as an example, the terminal A 1610 may transmit the allocation information to each of the terminal B 1620 and the terminal C 1630 via at least one of the PSCCH and the PSSCH, and is not limited to a specific embodiment. Also, the terminal A 1610 may transmit the allocation information to the terminal D 1640. That is, the terminal A 1610 may transmit the allocation information as information required for the terminal D 1640 to transmit the SL SRS. At this time, as an example, terminal A 1610 may transmit allocation information to terminal D 1640 via at least one of a PSCCH and a PSSCH, and is not limited to a specific embodiment. Based on the above, terminal D 1640 may transmit an SL SRS, and each of terminal A 1610, terminal B 1620, and terminal C 1630 may receive the SL SRS transmitted by terminal D 1640.

[0237] Thereafter, each of the terminal A 1610, the terminal B 1620, and the terminal C 1630 can perform measurement based on the SL SRS and obtain measurement information. At this time, each of the terminal B 1620 and the terminal C 1630 can transmit the measurement information to the terminal A 1610. At this time, the measurement information is a value measured by each terminal based on the SL SRS, and may be at least one of TDOA and RSTD, but is not limited thereto. As an example, the measurement information may be the measurement value itself or a location value of the terminal D 1640 derived based on the measurement value, and is not limited to a specific form. More specifically, the terminal A 1610 can obtain the measurement value measured based on the SL SRS from the terminal B 1620 and the terminal C 1630 as the measurement information. At this time, the terminal A 1610 can obtain the location value of the terminal D 1640 based on the measurement value obtained from the terminal B 1620 and the terminal C 1630.

[0238] As another example, terminal A 1610 may obtain, as measurement information, a location value of terminal D 1640 derived from measurements based on SL SRS from terminal B 1620 and terminal C 1630, and is not limited to a specific embodiment. Positioning may be performed as described above.

[0239] 11 to 16, the allocation information may include at least one of sequence information and resource information of the SL SRS transmitted by terminal D, as described above. In this case, as an example, an existing SRS sequence may be considered in relation to the generation of the SL SRS sequence, and the existing SRS sequence may be derived based on the above-mentioned [Equation 3] and [Equation 4].

[0240] TIFF2025501159000021.tif49170

[0241]

number

[0242] TIFF2025501159000023.tif71170

[0243]

number

[0244]

number

[0245] TIFF2025501159000026.tif49170

[0246]

number

[0247] TIFF2025501159000028.tif92170

[0248] TIFF2025501159000029.tif90170

[0249] As another example, the sequence ID information of the SRS can be provided to the terminal from the base station through higher layer signaling (e.g., RRC). Therefore, the terminal can obtain sequence ID information in the above-mentioned Figures 11 to 14, but the terminal performing sidelink communication without the control of the base station may not be able to obtain SRS ID information as in Figures 15 and 16. Therefore, the terminal needs to determine the SRS ID by itself in the above-mentioned Figures 15 to 16.

[0250] TIFF2025501159000030.tif72170

[0251]

number

[0252] Here, N for terminal D XID is a modular function, modular 2 16 The SRS ID, which is calculated based on the above and consists of 16 bits, can be used.

[0253] As another example, X ID The SRS ID can be constructed based on N bits. For example, the SRS ID is applied based on a modular function in [6], so that X ID It may be composed of bits.

[0254] As another example, a case where the ID of terminal A is used can be considered. In this case, the ID of terminal A is included in a sidelink assignment (SA) and the indicated ID is “n SA ID (sidelink group destination identity), but is not limited to this. At this time, when the SRS ID is configured based on 16 bits, n SA ID As another example, the SRS ID can be configured as n SA ID and the SRS ID is applied based on a modular function, so n SA ID It may be composed of the following bits.

[0255] As another example, the allocation information may include at least one of sequence information and resource information for the SL SRS transmitted by terminal D based on FIG. 11 to FIG. 16, as described above. At this time, as an example, existing SRS resource allocation parameters may be considered in relation to the SL SRS resource allocation information. More specifically, the resource allocation parameters for the SL SRS included in the allocation information may be generated based on the above-mentioned SRS-PosResourceSet and SRS-PosResource. As an example, as a resource set for the SL SRS for positioning, the parameters in SL-SRS-PosResourceSet may include parameters based on the parameters in SRS-PosResourceSet. Furthermore, as an example, as a resource for the SL SRS for positioning, the parameters of SL-SRS-PosResource may include parameters based on the parameters in SRS-PosResource.

[0256] However, SL-SRS PosResourceSet and SL-SRS PosResource must be distinguished from SRS PosResourceSet and SRS-PosResource, which are intended for transmission to existing base stations. In consideration of the above, SL-SRS PosResourceSet can be configured separately to be distinguished from SRS PosResourceSet. In this case, SL-SRS PosResourceSet can use resources other than those used by SRS PosResourceSet (SRS-PosResource).

[0257] In this case, for example, when performing sidelink-based positioning based on the base station under the control of the base station as shown in Figures 11 to 14, the base station can allocate SRS resources for sidelink and SRS resources to be transmitted to the base station separately. However, for example, when the terminal generates allocation information without the control of the base station as shown in Figures 15 and 16, the terminal may be pre-defined with a usable resource (SL-SRS-PosResource) in a resource (SL-SRS-PosResourceSet) configured separately from the SRS resource to be transmitted to the base station. In this case, the terminal can select a resource for SL SRS transmission from the usable resource (SL-SRS-PosResource) based on the pre-defined resource.

[0258] FIG. 17 is a diagram illustrating a method for performing positioning based on sidelink SRS applied to the present disclosure. Referring to FIG. 17, a first terminal and at least one more terminals may be present within the coverage of a base station. As an example, the first terminal and at least one more terminals may each be in an RRC-connected state with the base station 1110, but is not limited thereto. In this case, the location of the second terminal may be measured based on sidelink-based positioning.

[0259] Here, as an example, each of the first terminal and at least one or more terminals may receive allocation information from the base station. At this time, the allocation information may be information necessary for the second terminal requiring positioning to transmit the SL SRS. As an example, the allocation information may include at least one of resource and sequence information necessary for the second terminal to transmit the SL SRS, but may further include other information.

[0260] At this time, for example, the allocation information may be transmitted from the base station to the first terminal and at least one or more terminals by higher layer signaling (e.g., RRC). Then, the first terminal transmits the received allocation information to the second terminal (S1720). At this time, for example, the second terminal may transmit an SL SRS based on the received allocation information. At this time, the SL SRS transmitted by the second terminal may be received by each of the first terminal and at least one or more terminals. The first terminal may receive the SL SRS and perform measurement (S1730), and transmit the measurement information to the base station (S1740). Furthermore, each of the at least one or more terminals may receive the SL SRS from the second terminal and perform measurement. Then, each of the at least one or more terminals may transmit the measurement information to the base station. At this time, the measurement information is a value measured by each terminal based on the SL SRS, and may be at least one of TDOA and RSTD, but is not limited thereto. As an example, the measurement information may be a measurement value itself or a location value of the second terminal derived based on the measurement value, and is not limited to a specific form. Further, by way of example, but not limitation, the base station may further transmit the measurement information to a location server, and positioning may be performed as described above.

[0261] FIG. 18 is a diagram illustrating a method for performing positioning based on a sidelink SRS applied to the present disclosure. As an example, a first terminal may be located within the coverage of a base station. The first terminal may be in an RRC-connected state with the base station, but is not limited thereto. In addition, as an example, the first terminal may be capable of sidelink communication with at least one or more terminals. At this time, as an example, the first terminal may receive allocation information from the base station (S1810). Then, the first terminal transmits the received allocation information to the second terminal and at least one or more terminals (S1820). At this time, the allocation information may be information required for the second terminal requiring positioning to transmit the SL SRS. As an example, the allocation information may include at least one of resources and sequence information required for the second terminal to transmit the SL SRS, but may further include other information.

[0262] At this time, for example, the allocation information may be transmitted from the base station to the first terminal by higher layer signaling (e.g., RRC). Further, for example, the allocation information may be assigned by a location server, and the assigned information may be transmitted to the first terminal through the base station, and the present invention is not limited to a specific embodiment.

[0263] Then, the second terminal may transmit an SL SRS based on the allocation information received from the first terminal. At this time, the first terminal and at least one or more terminals may each receive the SL SRS transmitted by the second terminal and perform measurement (S1830). Furthermore, each of the at least one or more terminals may each receive the SL SRS transmitted by the second terminal and perform measurement. Then, each of the at least one or more terminals may transmit measurement information to the first terminal. That is, the first terminal may receive measurement information from each of the at least one or more terminals (S1840). Then, the first terminal may transmit the measurement information to the base station. At this time, the measurement information is a value measured by each terminal based on the SL SRS, and may be at least one of TDOA and RSTD, but is not limited thereto. As an example, the measurement information may be the measurement value itself or a location value of the second terminal derived based on the measurement value, and is not limited to a specific form. More specifically, each of the first terminal and at least one or more terminals may obtain the measurement value measured based on the SL SRS as measurement information. At this time, the first terminal can obtain the location value of the second terminal based on the measurement values ​​obtained from at least one or more terminals. Then, the first terminal can transmit the location value of the second terminal to the base station as measurement information. At this time, the base station can report the measurement information as the location value of the second terminal to the location server, and is not limited to a specific embodiment.

[0264] As another example, the first terminal may acquire measurement values ​​measured based on the SL SRS from at least one of the terminals as measurement information. In this case, the first terminal may transmit the measurement values ​​measured by the first terminal based on the SL SRS together with the acquired measurement information to the base station. In this case, the base station may acquire a location value of the second terminal based on the measurement values ​​measured by the first terminal and at least one or more terminals. As an example, the base station may report the measurement information as the location value of the second terminal to a location server, and the present invention is not limited to a specific embodiment.

[0265] As another example, each of the first terminal and at least one terminal may obtain a position value of the second terminal derived from measurements based on the SL SRS as measurement information, and may transmit the measurement information to the base station. As an example, the base station may report the measurement information as the position value of the second terminal to the location server, and the present invention is not limited to a specific embodiment. Positioning may be performed as described above.

[0266] FIG. 19 is a diagram illustrating a method for performing positioning based on a sidelink SRS applied to the present disclosure. Referring to FIG. 19, positioning can be performed based on sidelink communication between terminals without the control of a base station. As an example, a first terminal may be capable of sidelink communication with at least one or more terminals. At this time, the first terminal may generate allocation information (S1910). In this case, the allocation information may be information required for a second terminal requiring positioning to transmit an SL SRS. As an example, the allocation information may include at least one of resources and sequence information required for the second terminal to transmit an SL SRS, but may further include other information.

[0267] At this time, as an example, the first terminal may transmit the generated allocation information to the second terminal and at least one terminal (S1920). Then, the first terminal may receive the SL SRS transmitted by the second terminal and perform measurement (S1930). Furthermore, at least one terminal may receive the SL SRS transmitted by the second terminal and perform measurement. Then, the first terminal may receive measurement information from at least one terminal (S1940). At this time, the measurement information is a value measured by each terminal based on the SL SRS, and may be at least one of TDOA and RSTD, but is not limited thereto. As an example, the measurement information may be the measurement value itself or the location value of the second terminal derived based on the measurement value, and is not limited to a specific form. More specifically, the first terminal may obtain the measurement value measured based on the SL SRS from at least one terminal as measurement information. At this time, the first terminal may obtain the location value of the second terminal through the obtained measurement information and the measurement value directly measured by the first terminal.

[0268] As another example, the first terminal may obtain, as measurement information, a location value of the second terminal derived from measurements made based on the SL SRS from each of at least one or more terminals, and this is not limited to a specific embodiment.

[0269] FIG. 20 is a diagram showing a base station apparatus and a terminal apparatus to which the present disclosure can be applied.

[0270] The base station device 2000 may include a processor 2020, an antenna unit 2012, a transceiver 2014, and a memory 2016.

[0271] The processor 2020 performs baseband-related signal processing and may include an upper layer processing unit 2020 and a physical layer processing unit 2040. The upper layer processing unit 2020 may process operations of a Medium Access Control (MAC) layer, a Radio Resource Control (RRC) layer, or higher layers. The physical layer processing unit 2040 may process operations of a physical (PHY) layer (e.g., uplink reception signal processing, downlink transmission signal processing). In addition to performing baseband-related signal processing, the processor 2020 may also control the overall operation of the base station device 2000.

[0272] The antenna unit 2012 may include one or more physical antennas, and when multiple antennas are included, it may support MIMO (Multiple Input Multiple Output) transmission and reception. The transceiver 2014 may include a radio frequency (RF) transmitter and an RF receiver. The memory 2016 may store information processed by the processor 2020, software related to the operation of the base station device 2000, an operating system, applications, etc., and may include components such as a buffer.

[0273] The processor 2020 of the base station 2000 may be configured to implement the operation of the base station in the embodiments described in the present invention.

[0274] The terminal device 2050 may include a processor 2070, an antenna unit 2062, a transceiver 2064, and a memory 2066. As an example, in the present invention, the terminal device 2050 can communicate with the base station device 2000. As another example, in the present invention, the terminal device 2050 can perform sidelink communication with another terminal device. That is, the terminal device 2050 of the present invention refers to a device that can communicate with at least one of the base station device 2000 and another terminal device, and is not limited to communication with a specific device.

[0275] The processor 2070 performs baseband-related signal processing and may include an upper layer processing unit 2080 and a physical layer processing unit 2090. The upper layer processing unit 2080 may process operations of a MAC layer, an RRC layer, or a higher layer. The physical layer processing unit 2090 may process operations of a PHY layer (e.g., downlink reception signal processing, uplink transmission signal processing). In addition to performing baseband-related signal processing, the processor 2070 may also control the overall operation of the terminal device 2050.

[0276] The antenna unit 2062 may include one or more physical antennas, and when multiple antennas are included, MIMO transmission and reception may be supported. The transceiver 2064 may include an RF transmitter and an RF receiver. The memory 2066 may store information processed by the processor 2070, software related to the operation of the terminal device 2050, an operating system, applications, etc., and may include components such as a buffer. As an example, the base station 2000 and the terminal device 2050 may perform the operations of FIGS. 1 to 19 described above, and the present invention is not limited to a specific embodiment.

[0277] The various embodiments of the present disclosure do not list all possible combinations, but are intended to describe representative aspects of the present disclosure, and the matters described in the various embodiments may be applied independently or in combination of two or more.

[0278] Furthermore, various embodiments of the present disclosure may be implemented in hardware, firmware, software, or a combination thereof, etc. In the case of a hardware implementation, the implementation may be implemented in one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, microcontrollers, microprocessors, etc.

[0279] The scope of the present disclosure includes software or machine-executable instructions (e.g., operating systems, applications, firmware, programs, etc.) that cause operations according to the methods of the various embodiments to be performed on a device or computer, as well as non-transitory computer-readable medium on which such software, instructions, etc. may be stored and executed on a device or computer. [Industrial Applicability]

[0280] The following may also be applicable to other systems.

Claims

1. 1. A method for performing sidelink positioning in a wireless communication system, comprising: a step of a first terminal receiving allocation information from a base station, wherein each of at least one or more terminals receives the allocation information from the base station; transmitting the allocation information received by the first terminal to a second terminal; The first terminal receives a sidelink sounding reference signal (SL SRS) from the second terminal, wherein each of the at least one or more terminals receives the SL SRS transmitted from the second terminal; performing measurements based on the received SL SRS; and transmitting measurement information acquired based on the measurements to a base station, wherein each of the at least one or more terminals performs measurements based on the SL SRS to acquire measurement information, and transmits the acquired measurement information to the base station.

2. 1. A method for performing sidelink positioning in a wireless communication system, comprising: a first terminal receiving allocation information from a base station; transmitting the allocation information received by the first terminal to each of the second terminal and at least one or more terminals; receiving an SL SRS transmitted by the first terminal from the second terminal; A step of performing measurement based on the received SL SRS by the first terminal to obtain measurement information, wherein each of the at least one or more terminals performs measurement based on the SL SRS to obtain measurement information; The first terminal acquiring measurement information from the at least one terminal; and transmitting the acquired measurement information to the base station.

3. 1. A method for performing sidelink positioning in a wireless communication system, comprising: the first terminal generating allocation information; transmitting the allocation information generated by the first terminal to a second terminal and at least one more terminals; receiving an SL SRS transmitted by the first terminal from the second terminal; a step of performing measurement based on the received SL SRS by the first terminal to obtain measurement information, wherein each of the at least one or more terminals performs measurement based on the SL SRS to obtain measurement information; The first terminal obtaining measurement information from the at least one terminal.

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