Method and apparatus for performing sidelink positioning in wireless communication system

Abstract

According to one aspect of the present disclosure, a method of performing sidelink positioning in a wireless communication system may include acquiring sidelink resource pool configuration information, acquiring sidelink positioning reference signal (SL PRS) configuration information, and transmitting the SL PRS based on an SL PRS allocation.

Description

Technical Field

[0001] The present disclosure relates to methods and apparatus for performing sidelink positioning in a wireless communication system.

[0002] Related fields

[0003] Device-to-device (D2D) communication means that a single user equipment (UE) communicates directly with another UE. Direct communication means that a single UE communicates with another UE under the control of the network or communicates with another UE by the UE's own determination without using another network device. The D2D communication can be applied to vehicle communication, which is generally referred to as vehicle-to-everything (V2X). V2X communication may refer to a communication method for exchanging or sharing information such as traffic conditions by communicating with road infrastructure and other vehicles while driving. V2X-based services may include, for example, autonomous driving services, remote vehicle control services, interactive services such as games, and high-capacity audio / video services such as augmented reality (AR) and virtual reality (VR). Based on the performance requirements for supporting various V2X-based services through a 5G system, detailed technologies that are additionally required for the Long Term Evolution (LTE) and New Radio (NR) systems as radio access technologies (RATs) in 5G systems are being discussed. DETAILED DESCRIPTION Technical Topics

[0005] The technical subject matter of the present disclosure relates to a method and apparatus for performing sidelink positioning in a wireless communication system.

[0006] Additional technical subject matter of the present disclosure relates to methods and apparatus for allocating sidelink positioning reference signal (SL PRS) resources.

[0007] Additional technical subject matter of the present disclosure relates to a method and apparatus for allocating a SL PRS based on a bitmap of time resources for a side link resource pool.

[0008] Additional technical subject matter of the present disclosure relates to a method and apparatus for allocating a SL PRS based on a period of a side link resource selected by sensing from a side link resource pool.

[0009] Additional technical subject matter of the present disclosure relates to methods and apparatus for allocating SL PRS based on a synchronization signal block (SSB) periodicity.

[0010] The technical subject matter to be achieved by the present disclosure is not limited to the above-mentioned technical subject matter, and other technical subject matter not described may be clearly understood by a person of ordinary skill in the art to which the present disclosure belongs from the following description.

[0011] Technical Solution

[0012] According to one aspect of the present disclosure, a method for performing sidelink positioning in a wireless communication system may include: acquiring sidelink (SL) resource pool configuration information, acquiring sidelink positioning reference signal (SL PRS) configuration information, and sending SL PRS based on SLPRS assignment.

[0013] In addition, according to one aspect of the present disclosure, a method for performing side link positioning in a wireless communication system may include: selecting SL resources based on SL resource sensing in a side link (SL) resource pool, obtaining side link positioning reference signal (SLPRS) configuration information, and sending SL PRS based on SL PRS assignment.

[0014] In addition, according to one aspect of the present disclosure, a method for performing sidelink positioning in a wireless communication system may include: obtaining synchronization signal block (SSB) configuration information, obtaining sidelink positioning reference signal (SL PRS) configuration information, and sending SL PRS based on SL PRS assignment.

[0015] Technical Effects

[0016] According to the present disclosure, a method for performing sidelink positioning in a wireless communication system may be provided.

[0017] According to the present disclosure, a method of allocating sidelink positioning reference signal (SL PRS) resources may be provided.

[0018] According to the present disclosure, a method of allocating an SLPRS based on a bitmap of time resources for a side link resource pool may be provided.

[0019] According to the present disclosure, a method of allocating an SL PRS based on a period of a side link resource selected by sensing from a side link resource pool may be provided.

[0020] According to the present disclosure, a method of allocating SL PRS based on a synchronization signal block (SSB) period may be provided.

[0021] Effects to be achieved by the present disclosure are not limited to the above-mentioned effects, and a person of ordinary skill in the art to which the present disclosure belongs may clearly understand other technical effects that are not described according to the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 An example of a vehicle-to-everything (V2X) scenario to which the present disclosure may be applied is shown.

[0024] Figure 2 An example of a V2X scenario to which the present disclosure can be applied is shown.

[0025] Figure 3 An example of a V2X scenario to which the present disclosure can be applied is shown.

[0026] Figure 4 An example of a service provided based on a side link to which the present disclosure can be applied is shown.

[0027] Figure 5 A new radio (NR) frame structure to which the present disclosure is applicable is shown.

[0028] Figure 6 The NR resource structure to which the present disclosure is applicable is shown.

[0029] Figure 7 An example of a V2X resource pool configuration to which the present disclosure may be applied is shown.

[0030] Figure 8 An example of a V2X resource pool configuration to which the present disclosure may be applied is shown.

[0031] Fig. 9 A method for performing positioning based on an observed time difference of arrival (OTDOA) to which the present disclosure can be applied is shown.

[0032] Fig.10 A control plane and user plane configuration diagram of the NR Positioning Protocol (NRPP) to which the present disclosure can be applied is shown.

[0033] Fig.11 A method of performing positioning based on a Side Link Sounding Reference Signal (SL SRS), to which the present disclosure can be applied, is shown.

[0034] Fig.12 A method of performing positioning based on request information and based on SL SRS to which the present disclosure can be applied is shown.

[0035] Fig.13 A method of performing positioning based on SL SRS to which the present disclosure can be applied is shown.

[0036] Fig.14 A method of performing positioning based on request information and based on SL SRS to which the present disclosure can be applied is shown.

[0037] Fig.15 A method of performing positioning based on SL SRS to which the present disclosure can be applied is shown.

[0038] Fig.16 A method of performing positioning based on a SL SRS using request information to which the present disclosure can be applied is shown.

[0039] Fig.17 A comb pattern suitable for use in the present disclosure is shown.

[0040] Fig.18 A method for performing cyclic prefix based on a downlink (DL) positioning reference signal (PRS) assignment pattern applicable to the present disclosure is shown.

[0041] Fig.19 A method for performing cyclic prefix based on a DL PRS assignment pattern applicable to the present disclosure is shown.

[0042] Fig. 20 A DL PRS resource allocation method applicable to the present disclosure is shown.

[0043] Fig.21 The structure of the NR side link time slot to which the present disclosure is applicable is shown.

[0044] Fig. 22 The NR side link resource pool configuration to which the present disclosure can be applied is shown.

[0045] Fig.23 is a flowchart illustrating a method for determining an SL PRS allocation period based on a side link slot set bitmap of a side link resource pool, to which the present disclosure may be applied.

[0046] Fig.24 The entire sensing-based resource selection and resource pool configuration to which the present disclosure can be applied is shown.

[0047] Fig.25 The present disclosure is shown to be applicable to the time period P based reserve Method to perform repeated transfers.

[0048] Fig.26 is a flowchart illustrating a method of determining an SL PRS allocation period based on a SL resource selected from a side link resource pool through SL resource sensing, to which the present disclosure may be applied.

[0049] Fig. 27 is a flowchart illustrating a method of determining an SL PRS allocation period based on an SSB, to which the present disclosure may be applied.

[0050] Fig.28 is a schematic diagram showing a base station device and a terminal device to which the present disclosure can be applied.

[0051] Best Mode

[0052] Various examples of the present disclosure will be described more fully below with reference to the accompanying drawings so that those skilled in the art to which the present disclosure pertains can easily implement these examples. However, the present disclosure may be implemented in various forms and is not limited to the examples described herein.

[0053] When it is determined that a detailed description related to a known configuration or function is omitted in an example describing the present disclosure, the detailed description is omitted. In addition, parts irrelevant to the description of the present disclosure are omitted, and the same reference numerals represent the same elements.

[0054] It will be understood that when an element is referred to as being "connected to," "coupled to," or "accessed to" another element, it may be directly connected, coupled to, or accessed to the other element, or intervening elements may be present. Furthermore, it will be understood that when an element is described as "including / comprising" or "having" another element, it specifies the presence of the further element, but does not preclude the presence of the further element described in other ways.

[0055] In addition, terms such as first, second, etc. can be used to describe the elements in the description herein. These terms are used to distinguish one element from another element. Therefore, these terms do not limit these elements, arrangement order, sequence, etc. Therefore, the first element in one example can be referred to as the second element in another example. Similarly, the second element in one example can be referred to as the first element in another example.

[0056] Here, providing distinguishing elements is only for the purpose of clearly explaining each feature, and does not mean that the elements must be separated from each other. That is, multiple elements can be integrated into a single hardware or software unit. Moreover, a single element can be distributed to multiple hardware or software units. Therefore, unless otherwise described, integrated or distributed examples are also included in the scope of this disclosure.

[0057] Here, the elements described in various examples may not be necessary, and may be partially optional. Therefore, examples including a partial set of elements described in the examples are also included in the scope of this disclosure. In addition, examples including another element other than the elements described in various examples are also included in the scope of this disclosure.

[0058] The description described herein relates to a wireless communication network, and the operations performed in the wireless communication network may be performed in a process of controlling the network and sending data in a system (e.g., a base station) that controls the wireless communication network, or may be performed in a process of sending or receiving signals in a user device connected to the wireless communication network.

[0059] Obviously, in a network including a base station and a plurality of network nodes, various operations performed for communicating with a terminal may be performed by the base station or other network nodes other than the base station. Here, the term "base station (BS)" may be used interchangeably with other terms, such as a fixed station, Node B, eNodeB (eNB), and access point (AP). In addition, the term "terminal" may be used interchangeably with other 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).

[0060] Here, sending or receiving a channel includes the meaning of sending or receiving information or signals through the corresponding channel. For example, sending a control channel means sending control information or signals through the control channel. Similarly, sending a data channel means sending data information or signals through the data channel.

[0061] The definitions of the abbreviations used herein are as follows.

[0062] D2D: Device to Device (communication)

[0063] DCI: Downlink Control Information

[0064] V2X: Vehicle to X (everything)

[0065] V2V: Vehicle to Vehicle

[0066] V2P: Vehicle to Pedestrian

[0067] V2I / N: Vehicle to Infrastructure / Network

[0068] SL: Sidelink

[0069] SCI: Sidelink Control Information

[0070] SFCI: Sidelink Feedback Control Information

[0071] PSSCH: Physical Sidelink Shared Channel

[0072] PSBCH: Physical Sidelink Broadcast Channel

[0073] PSCCH: Physical Sidelink Control Channel

[0074] PSDCH: Physical Sidelink Discovery Channel

[0075] PSFICH: Physical Sidelink Feedback Indicator Channel

[0076] ProSe: (Device to Device) Proximity Services

[0077] SLSS: Sidelink Synchronization Signal

[0078] PSSID: Physical side link synchronization identifier

[0079] n SA ID : Sidelink group destination identifier

[0080] N SL ID : Physical side link synchronization flag

[0081] SA: Scheduling Assignment

[0082] TB: Transport Block

[0083] TTI: Transmission Time Interval

[0084] RB: Resource Block

[0086] In the following description, although the term “New Radio (NR) system” is used to distinguish a system according to various examples of the present disclosure from an existing system, the scope of the present disclosure is not limited thereto.

[0087] For example, the New Radio (NR) system supports various subcarrier spacings (SCS) by considering various scenarios, service requirements, potential system compatibility, etc. In addition, in order to overcome the adverse channel environment such as high path loss, phase noise, and frequency offset that occur at high carrier frequencies, the NR system can support the transmission of physical signals / channels through multiple beams. In this way, the NR system can support a variety of applications, such as enhanced mobile broadband (eMBB), massive machine type communication (mMTC) / super machine type communication (uMTC), and ultra-reliable and low-latency communication (URLLC). Here, the term "NR system" used here is used as an example of a wireless communication system, and the term "NR system" itself is not limited to the above-mentioned features.

[0088] In addition, for example, a fifth generation (5G) mobile communication technology may be defined. Here, the 5G mobile communication technology may be defined by including the existing advanced long term evolution (LTE-A) system and the above-mentioned NR system. That is, the 5G mobile communication technology may be operated by considering backward compatibility with the previous system and the newly defined NR system.

[0089] For example, the sidelink field of 5G may include all of the sidelink technology in the LTE system and the sidelink technology in the NR system. Here, the sidelink field may be necessary to enhance performance through ultra-high reliability and ultra-low latency and to integrate new and various services.

[0090] In the following, for the sake of clarity, operations and related information for vehicle-to-everything (V2X) communication will be described based on the NR system. Here, the following features may not be limited to a specific system and may also be applied to other systems of similar configurations. However, it is provided only as an example and the present invention is not limited thereto.

[0091] Meanwhile, V2X communication can be vehicle-based communication. Here, the concept of vehicles is evolving from simple transportation equipment to new platforms. For example, information technology (IT) is applied to vehicles, and various V2X services are provided accordingly. Services such as preventing traffic accidents, improving traffic environment, autonomous driving, and remote driving are provided. For this reason, there is a growing demand for the development and application of sidelink-related technologies.

[0092] In detail, with respect to existing communication technologies, communication from a base station (BS) to a user equipment (UE) may be a downlink, and communication from a UE to a BS may be an uplink. Here, in addition to communication between a BS and a UE, communication between UEs may also be required. Here, communication from one UE to another UE may be the aforementioned side link. For example, with respect to the above-mentioned V2X communication, vehicle-to-vehicle (V2V) communication or communication between a vehicle and another object (e.g., an object other than a BS, such as a pedestrian UE, a UE-type roadside unit (RSU), etc.) may be a side link. That is, in the case of performing vehicle-based communication, there are some constraints of using only communication with only an eNodeB. Therefore, the above-mentioned side link technology may be developed and applied.

[0093] Figures 1 to 3 A V2X scenario to which the present disclosure can be applied is shown.

[0094] Figure 1 This may be a scenario in which communication is performed based on the above-mentioned side link. Figure 2 This may be a scenario where V2X operations are performed using communication between a UE (or vehicle) and a BS. Figure 3 It may be a scenario in which communications are performed using all of the above-mentioned side links as well as communicating with a BS.

[0095] For example, in the description related to V2X, UE may be a vehicle. In the description related to V2X, UE and vehicle are collectively referred to as UE. For example, UE may refer to a device capable of performing communication with a side link and a BS, and may include a vehicle for V2X.

[0096] In addition, with respect to V2X, D2D (device to device) may refer to communication between UEs. In addition, the term "proximity-based services (ProSe)" may indicate proximity services for UEs performing D2D communication. In addition, SL (sidelink) may be the above-mentioned sidelink, and sidelink control information (SCI) may indicate control information related to the above-mentioned sidelink. In addition, a physical sidelink shared channel (PSSCH) may be a channel for sending data through a sidelink, and a physical sidelink control channel (PSCCH) may be a channel for sending control information through a sidelink. In addition, a physical sidelink broadcast channel (PSBCH) may be a channel for broadcasting signals through a sidelink and forwarding system information. In addition, a physical sidelink feedback indication channel (PSFICH) may be a channel for guiding feedback information as a sidelink feedback channel. In addition, a sidelink synchronization signal (SLSS) may be a synchronization signal for a sidelink, and a physical sidelink synchronization identifier (PSSID) may be ID information for sidelink synchronization. In addition, (Side link group destination identification) may be ID information for distinguishing a side link group, and (Physical Side Link Synchronization Identifier) ​​may be ID information used for side link synchronization. V2V may be referred to as vehicle-to-vehicle communication, V2P may be referred to as communication between vehicles and pedestrians, and V2I / N may be referred to as communication between vehicles and infrastructure / network.

[0097] The terms SA, TB, TI, and RB may be the same terms used in existing LTE. For example, in V2X communication, the control information sent from a UE to another UE may be a scheduling assignment (SA). If the above control information is used for sidelink communication, the control information may be an SCI. Here, the SCI may be sent via the PSCCH. In addition, a portion of the SCI may be sent via the PSCCH, while another portion may be sent via the PSSCH.

[0098] In V2X communication, data transmitted from a UE to another UE may be configured based on the unit of a transmission port (TB). Here, sidelink data may be transmitted through a PSSCH.

[0099] Next, here, the operation mode may be defined based on a resource allocation method for transmitting data and control information for V2X communication or direct link (eg, D2D, ProSe, or SL) communication.

[0100] For example, the eNodeB resource scheduling mode may be a mode in which the eNodeB or relay node schedules resources for the UE to send V2X (or direct link) control information and / or data. In this way, the UE may send V2X (or direct link) control information and / or data. The mode may refer to the eNodeB resource scheduling mode.

[0101] For a more detailed example, the eNodeB or relay node may provide the sidelink (or direct link) sending UE with scheduling information about resources for sending sidelink (or direct link) control information and / or data through downlink control information (DCI). Therefore, the sidelink (or direct link) sending UE may send the sidelink (or direct link) control information and data to the sidelink (or direct link) receiving UE, and the sidelink (or direct link) receiving UE may receive the sidelink (or direct link) data based on the sidelink (or direct link) control information.

[0102] In addition, the UE autonomous resource selection mode may be a resource allocation mode in which the UE autonomously selects resources for sending control information and data. The UE's resource selection may be determined by the UE sensing from a resource pool (i.e., a resource candidate set). On the selected resources, the UE may send V2X (or direct link) control information and / or data.

[0103] For a more detailed example, the sidelink (or direct link) sending UE may use its selected resources to send the sidelink (or direct link) control information and data to the sidelink (or direct link) receiving UE, and the sidelink (or direct link) receiving UE may receive the sidelink (or direct link) data based on the sidelink (or direct link) control information.

[0104] The above-mentioned BS resource scheduling mode may be referred to as mode 1 in the side link (or direct link) communication for D2D, etc. In addition, in the side link communication for V2X, etc., the BS resource scheduling mode may be referred to as mode 3. In addition, the UE autonomous resource selection mode may be referred to as mode 2 in the side link (or direct link) communication for D2D, etc. In addition, the UE autonomous resource selection mode may be referred to as mode 4 in the side link communication for V2X, etc. However, they are provided only as examples, and the present disclosure is not limited thereto. That is, they may be considered to be the same mode with respect to the same objective and the same operation.

[0105] For example, in NR V2X, the BS resource scheduling mode can be called Mode 1, and the UE autonomous resource selection mode can be called Mode 2.

[0106] Although the following description is made based on V2X communication for the sake of clarity, it is not limited thereto. For example, the present disclosure may also be applied to communications based on direct links such as D2D, ProSe, etc.

[0107] Likewise, for example, V2X may be a general term for V2V, V2P, and V2I / N. Here, each of V2V, V2P, and V2I / N may be defined as in Table 1 below, however, it is not limited thereto. That is, Table 1 below is provided only as an example and is not limited thereto.

[0108] [Table 1]

[0109]

[0111] Furthermore, V2X communication may include communication based on PC5, which is an interface for sidelink communication.

[0112] For example, Table 2 and Figure 1 It may involve scenarios for supporting V2X operations based on PC5 interface (or SL). Here, Figure 1 (a) shows an example of V2V operation, Figure 1 (b) shows an example of V2I operation, and Figure 1 (c) shows an example of V2P operation. That is, Figure 1 A method of performing communication based on a side link (SL) is shown. Here, communication can be performed without a BS.

[0113] [Table 2]

[0114]

[0115] At the same time, Table 3 and Figure 2 It may refer to a scenario for supporting V2X operations based on the Uu interface (i.e., the interface between the UE and the BS). Here, Figure 2 (a) shows an example of V2V operation, Figure 2 (b) shows an example of V2I operation, and Figure 2 (c) shows an example of V2P operation. That is, communication between UE and BS can be used to support V2X operation.

[0116] [Table 3]

[0117]

[0118] Table 4 below and Figure 3 It may involve supporting V2X operations using all UE interfaces and PC5 interface (or SL). Here, Figure 3 (a) shows scenario 3A of Table 4, Figure 3(b) shows scenario 3B of Table 4.

[0119] For details, refer to Figure 3 (a), the UE may send a V2X message to other UEs via a side link. One of the UEs receiving the V2X message may transmit the V2X message to the BS via an uplink (UL). The BS may receive the V2X message and may transmit a message based on the V2X message to other neighboring UEs via a downlink (DL). Here, for example, the downlink transmission may be performed using a broadcast method.

[0120] refer to Figure 3 (b), the UE may send a V2X message to the BS via an uplink (UL), and the BS may send the V2X message to at least one UE or RSU. In response, the UE or RSU may send the received message to multiple neighboring UEs via a side link (SL).

[0121] exist Figure 3 In (a) and (b), communication between the BS and the UE and the side link can be used to support V2X operations.

[0122] [Table 4]

[0123]

[0124] As described above, V2X communication can be performed through the BS and can be performed through direct communication between UEs. Here, if the BS is used, transmission and reception can be performed through the Uu link, which is a communication interface between the LTE BS and the UE in the LTE-based V2X communication. In addition, if the side link is used for direct communication between UEs, transmission and reception can be performed through the PC5 link, which is a communication interface between the LTE UEs in the LTE-based V2X communication.

[0125] For example, even in the NR system, V2X communication can be performed using communication between the UE and the BS and a side link between the UEs. Here, there may be differences between the communication (uplink / downlink) methods between the BS and the UE in the NR system. For example, the communication method may be similar in some features, and there may be some changes based on the NR system as a new system. In addition, for example, there may be differences between the side link in the NR system and the side link in the existing system. That is, by considering the above-mentioned communication differences between the BS and the UE, there may be some changes in the side link based on the NR system as a new system.

[0126] Figure 4 An example of a service provided based on a side link to which the present disclosure can be applied is shown.

[0127] refer to Figure 4 , V2X-related services or Internet of Things (IoT) services can be provided based on the 5G side link. Here, for example, the 5G side link may be a concept that includes both the side link based on the existing LTE system and the side link based on the NR system. That is, the 5G side link may be a service provided by considering the side link applied in each system.

[0128] For example, refer to Figure 4 , for V2X services, vehicle platooning, autonomous driving, advanced sensors, and remote driving services may be provided. Here, vehicle platooning may refer to a technology that allows multiple vehicles to dynamically form a group and operate in a similar manner. In addition, autonomous driving may refer to a technology for driving a vehicle based on full automation and semi-automation. In addition, advanced sensors may refer to a technology for collecting and exchanging data acquired from sensors or video images. In addition, remote driving may refer to a technology for remotely controlling a vehicle and a technology for an application. That is, the above-mentioned services may be provided as V2X-based services. Here, the services are provided only as examples, and the present disclosure is not limited thereto. Here, requirements such as ultra-latency, ultra-connectivity, low power, and high reliability may be required to provide the V2X services. Therefore, the 5G side link may require an operating method to meet the service and requirements therefor. A detailed method taking these requirements into account is described below.

[0129] In the following, the physical resource structure of the NR system is described.

[0130] Figure 5 An example of a frame structure of an NR system to which the present invention can be applied is shown.

[0131] In NR, the basic unit of time domain can be T c =1 / (Δf max ·N f ). Here, Δf max =480·10 3 And N f =4096. In LTE, T s =1 / (Δf ref ·N f,ref ),Δf ref =15·10 3 Hz, and N f,ref = 2048 may be defined as a reference time unit. The constant of the multiple relationship between the NR reference time unit and the LTE reference time unit may be defined as κ = T s / T c =64.

[0132] Reference Figure 5, the time structure of a frame for downlink / uplink (DL / UL) transmission may include T f =(Δf mas N f / 100)·T s = 10 ms. Here, a single frame may include a time corresponding to T sf =(Δf mas N f / 1000)·T s = 10 subframes of 1 ms. The number of consecutive OFDM symbols per subframe can be In addition, each frame may be divided into two half frames, and the half frame may include 0 to 4 subframes and 5 to 9 subframes. Here, half frame 1 may include 0 to 4 subframes, and half frame 2 may include 5 to 9 subframes.

[0133] refer to Figure 5 , N TA The timing advance (TA) between the downlink (DL) and the uplink (UL) is shown. Here, the transmission timing of the uplink transmission frame i is determined based on the downlink reception time at the UE according to the following equation 1.

[0134] [Equation 1]

[0135] T TA =(N TA +N TA,offset )·T C

[0136] In Equation 1, N TA,offset Indicates the TA offset due to duplex mode differences, etc. Basically, in frequency division duplex (FDD), N TA,offset = 0. In time division duplex (TDD), N TA,offset It may be defined as a fixed value by considering a margin of DL-UL switching time.

[0137] Figure 6 An NR resource structure to which the present disclosure is applicable is shown.

[0138] Resource elements within a resource grid may be indexed based on each subcarrier spacing. Here, a single resource grid may be generated for each antenna port and subcarrier spacing. Uplink / downlink transmission and reception may be performed based on the corresponding resource grid.

[0139] A single resource block is configured in the frequency domain using 12 resource elements, and an index n_PRB is configured for a single resource block every 12 resource elements. The index of the resource block can be used in a specific frequency band or system bandwidth. The index of the resource block can be defined as shown in Equation 2. Here, N RBsc refers to the number of subcarriers per resource block, and k represents the subcarrier index.

[0140] [Equation 2]

[0141]

[0142] Numerologies can be configured differently to meet various services and requirements of the NR system. For example, multiple subcarrier spacings (SCS) can be supported, which is different from the existing LTE / LTE-A system that supports a single SCS.

[0143] The new digital parameter configuration of the NR system including support for multiple SCSs can operate in a frequency range or carrier such as 3 GHz or less, 3 GHz to 6 GHz, or 6 GHz to 52.6 GHz to solve the problem that a wide bandwidth cannot be obtained in an existing frequency range or carrier such as 700 MHz or 2 GHz. However, the scope of the present disclosure is not limited to this.

[0144] The following Table 5 shows an example of digital parameter configuration supported by the NR system.

[0145] [Table 5]

[0146] u <![CDATA[Δf=2 u ·15[kHz]]]> Cyclic prefix 0 15 normal 1 30 normal 2 60 Normal, Extended 3 120 normal 4 240 normal

[0147] Referring to Table 5, the digital parameter configuration may be defined based on the SCS used in the OFDM system, the cyclic prefix (CP) length, and the number of OFDM symbols per time slot. The above values ​​may be provided to the UE through the upper layer parameters DL-BWP-mu and DL-BWP-cp (DL) and UL-BWP-mu and UL-BWP-cp (UL).

[0148] For example, referring to Table 5 below, if μ=2 and SCS=60 kHz, normal CP and extended CP may be applied. In other digital parameter configuration indexes, only normal CP may be applied.

[0149] A normal time slot may be defined as a basic time unit for sending a single piece of data and control information in an NR system. The length of a normal time slot may basically include 14 OFDM symbols. In addition, unlike a time slot, a subframe may have an absolute time length corresponding to 1ms in an NR system and may be used as a reference time for the length of another time section. Here, for the coexistence and backward compatibility of LTE and NR systems, the NR standard may require a time period such as an LTE subframe.

[0150] For example, in LTE, data may be transmitted based on a transmission time interval (TTI) as a unit time. TTI may include at least one subframe unit. Here, even in LTE, a single subframe may be set to 1 ms and may include 14 OFDM symbols (or 12 OFDM symbols).

[0151] In addition, in the NR system, non-time slots can be defined. Non-time slots may refer to time slots having at least one less symbol than the number of symbols of normal time slots. For example, in the case of providing low latency such as ultra-reliable and low-latency communication (URLLC) services, latency can be reduced by non-time slots having a number of time slots less than the number of time slots of normal time slots. Here, the number of OFDM symbols included in the non-time slot can be determined based on the frequency range. For example, non-time slots with a length of 1 OFDM symbol in a frequency range of 6GHz or higher can be considered. As another example, the number of symbols used to define a non-time slot may include at least two OFDM symbols. Here, the number range of OFDM symbols included in the non-time slot can be configured to have a micro-slot length of up to (normal time slot length)-1. Here, although the number of OFDM symbols can be limited to 2, 4 or 7 as a non-time slot standard, it is provided only as an example.

[0152] Furthermore, for example, SCSs corresponding to μ=1 and 2 can be used in an unlicensed band of 6 GHz or less, and SCSs corresponding to μ=3 and 4 can be used in an unlicensed band of 6 GHz or more.

[0153] [Table 6]

[0154]

[0155] Table 6 shows the number of OFDM symbols per time slot for each SCS setting parameter μ in the case of normal CP, as provided in Table 6. The number of time slots per frame and the number of time slots per subframe Here, in Table 6, the values ​​are based on a normal slot having 14 OFDM symbols.

[0156] [Table 7]

[0157]

[0158] Table 7 shows the number of OFDM symbols based on each time slot when extended CP (μ=2 and SCS=60kHz) can be applied. The normal time slots are 12, the number of time slots per frame and the number of time slots per subframe.

[0159] In addition, as described above, a single subframe may correspond to 1 ms on the time axis. Moreover, a single time slot may correspond to 14 symbols on the time axis. In addition, for example, a single time slot may correspond to 7 symbols on the time axis. Therefore, the number of time slots and the number of symbols available within 10 ms corresponding to a single radio frame may be set differently. Table 8 shows the number of time slots and the number of symbols according to each SCS. Here, for example, the SCS of 480 kHz may not be considered, and the present disclosure is not limited thereto.

[0160] [Table 8]

[0161]

[0162] Figure 7 and 8 An example of a V2X resource pool configuration to which the present disclosure may be applied is shown.

[0163] refer to Figure 7 and 8 , describes a method for configuring resource pools for a control channel (PSCCH) and a data channel (PSSCH) in V2X, through which a scheduling assignment (SA) is sent and through which data related thereto is sent. Here, the resource pool may refer to a set of resource candidates that can be used for transmission of SA and / or data. Each resource pool may be referred to as a time slot pool in the time domain and may also be referred to as a resource block pool in the frequency domain. Here, as Figure 7 and 8 The resource pool in the example may be a resource pool for vehicle (V)-UE in V2X. In addition, Figure 7 and 8 The resource pool configuration method in the example is provided only as an example, and the resource pool may be configured using another method.

[0164] like Figure 7 and Figure 8 The resource pool in the example can be defined in UE autonomous resource selection mode (or mode 2).

[0165] In the BS resource scheduling mode (or mode 1), all side link time slots in the time domain (e.g., corresponding to all uplink time slots in NR) and resources corresponding to all resource blocks (RBs) within the V2X carrier or frequency band in the frequency domain may be a resource candidate set that can be used to transmit SA and / or data. In addition, even in the BS resource scheduling mode (or mode 1), by separately defining a resource pool as in the UE autonomous resource selection mode (or mode 2), a resource candidate set that can be used to send SA and / or data can be configured.

[0166] That is, the reference resource selection mode (or mode 2) and / or the eNodeB resource scheduling mode (or mode 1) may be defined according to the reference resource selection mode. Figure 7 and 8 The resource pool of the present disclosure is described.

[0167] Hereinafter, a time slot pool corresponding to a resource pool in the time domain will be further described.

[0168] Figure 7 FIG. 1 shows the configuration of the time slots of the resource pool in the time domain relative to the resource pool. Figure 7 , the time slot of the resource pool for V2X may be defined by indicating repetition of a bitmap about all time slots except a specific time slot. The time slot of the resource pool for V2X may be a time slot in which transmission and / or reception of SA and / or data of the resource pool in V2X is allowed.

[0169] Here, the time slots excluded from the bitmap repetition may include time slots for sending side link signal blocks (SSBs), which include primary side link synchronization signals (PSSS), secondary side link synchronization signals (SSSS), and physical side link broadcast channels (PSBCH). In addition, the excluded time slots may also include downlink (DL) time slots or flexible time slots, but not uplink (UL) time slots that can be used as side link (SL) time slots in TTD. Here, the excluded time slots are not limited to the above examples.

[0170] For example, the excluded time slots within the system frame number (SNF) or D2D frame number (DFN) period may include d non-uplink time slots and SSB time slots. In addition, the excluded time slots may also include d' time slots that are excluded, so that the bitmap with a length of Lbitmap may be repeatedly applied in integer multiples within the SFN or DFN period. Here, the excluded time slots are not limited to the above examples.

[0171] In addition, upper layer signaling such as RRC can be used ( Figure 7 The signaling field "Time slot indication of resource pool" in the bitmap is used to indicate the bitmap of repeated application. The length of the signaling field can be 16, 20 or 100, but is not limited to this. If the bitmap value is 1, it can indicate the time slot used for the resource pool. If the bitmap value is 0, it can indicate the time slot that does not belong to the resource pool. Here, Figure 7 The value of u can follow the values ​​defined in Tables 5 to 7 as a value according to the subcarrier spacing (SCS).

[0172] Next, the resource block pool corresponding to the resource pool in the frequency domain will be further described.

[0173] Figure 8 FIG. 4 shows a time slot for configuring a resource pool in the frequency domain. Figure 8 , the PSCCH for transmitting SA and the PSSCH for transmitting data in the resource pool may be transmitted simultaneously in a single subchannel. Here, the PSSCH may be transmitted on the entire subchannel, and the PSCCH may be transmitted in a portion of the subchannel.

[0174] refer to Figure 8 , in which the resource pool is configured for V2X in the time domain, it can be relative to all The "starting RB of a subchannel" is defined based on a single RB unit (here, represents the total number of RBs corresponding to the system bandwidth of the uplink (UL), and V2X for the sidelink is defined in the UL band, so the UL can be replaced by the SL (i.e., Can be applied to replace ). The signaling field "starting RB of subchannel" may be indicated by upper layer signaling such as RRC. Continuous RBs corresponding to the total number of K subchannels starting from the RB indicated by such "starting RB of subchannel" belong to the resource pool. Here, the number of RBs constituting a single subchannel may be indicated by a signaling field "subchannel size", and the number of K subchannels may be indicated by a signaling field "number of subchannels", through upper layer signaling such as RRC.

[0175] For example, the "subchannel size" N subchannel It can be 10, 15, 20, 25, 50, 75 or 100 RBs, but is not limited thereto, and 4, 5 or 6 RBs can be used. Figure 8 , the PSCCH of the SA allocated to a portion of the subchannel can be allocated to X RBs in the subchannel. Here, X≤N subchannel .

[0177] The positioning technology applied below is being further improved using NR wireless technology based on long term evolution (LTE), and includes technology for meeting up to 3m error indoors and up to 10m error outdoors for 80% of users within the coverage area when applied for commercial purposes. To this end, various technologies are considered for uplink and / or downlink, including those based on time of arrival and those based on departure / arrival angle.

[0178] As a downlink-based method, a time-based technique includes a DL-Time Difference of Arrival (TDOA) method, and an angle-based technique includes a DL-Angle of Departure (DL-AoD) method. For example, when estimating the position of a UE based on DL-TDOA, the arrival time difference between signals transmitted from different transmission points may be calculated, and the position of the UE may be estimated by the arrival time difference value and the position information of each transmission point. In addition, for example, when estimating the position of a UE based on DL-AoD, the position of the UE may be estimated by verifying the departure angle of a signal transmitted to the UE and by verifying the direction in which the signal is transmitted based on the position of the corresponding transmission point.

[0179] In addition, as an uplink-based method, a time-based technique includes a UL-TDOA method, and an angle-based technique includes a DL-Angle of Arrival (AOA) method. For example, when estimating the position of a UE based on UL-TDOA, the time difference of a signal transmitted from the UE to each transmission point may be calculated, and the position of the UE may be estimated by the arrival time difference value and the position information of each transmission point. In addition, for example, when estimating the position of a UE based on DL-AoA, the position of the UE may be estimated by verifying the arrival angle of a signal transmitted from the UE and by verifying the direction in which the signal is transmitted based on the position of the corresponding transmission point.

[0180] In addition, downlink and uplink-based methods include a multi-cell round-trip time (RTT) method, a transmission reception point (TRP) for NR uplink and downlink positioning and / or an RTT method between one or more adjacent gNodeBs, and an enhanced cell ID (E-CID) method. For example, when estimating the position of a UE based on multi-cell RTT, the time (i.e., RTT) used to send a signal and receive a response in multiple cells can be measured, and the position of the UE can be estimated by the location information of the multiple cells. In addition, the position of the UE can be estimated by verifying the RTT signal in the gNodeB and / or TRP. In addition, when estimating the position of the UE based on E-CID, the position of the UE can be estimated via the cell location information by measuring the angle of arrival and the reception strength and by verifying each cell ID.

[0181] In order to implement the above technology, the positioning reference signal (PRS) based on the LTE downlink is newly discussed as a "DL PRS" modified according to the NR downlink structure. In addition, for the uplink, it is evolving into an "SRS for positioning", which is a reference signal improved by considering the sounding reference signal (SRS) for positioning, which is an NR-based uplink reference signal considering MIMO.

[0182] Furthermore, in order to provide improved solutions associated with positioning operations, additional requirements regarding high accuracy of horizontal and vertical positioning, low latency, network efficiency (e.g., scalability, RS overhead, etc.), and UE efficiency (e.g., power consumption, complexity, etc.) are being considered.

[0183] For example, some requirements may be considered so that positioning operations can have high accuracy considering Industrial Internet of Things IoT (IIoT) scenarios. To this end, DL / UL location reference signals, signaling / procedures for accuracy improvement, reduced latency, and methods for improving network efficiency and UE efficiency may be considered.

[0184] Therefore, work to improve the performance of NR-based positioning techniques for higher accuracy and lower latency as well as network / UE efficiency is being applied to commercial use cases (such as IoT devices for smart homes or wearables) as well as IIoT use cases (such as IoT devices in smart factories).

[0185] At this point, the work aims to achieve an accuracy of 1m for commercial use cases and 0.2m for IIoT use cases, and further reduce latency from the current 100ms to within 10ms.

[0186] Here, the IIoT scenario for equipment (indoor factory equipment) indoors in a smart factory can be shown in Table 9 below. In addition, for example, Table 10 below shows the configuration of the simulation taking into account the IIoT scenario. Specifically, in Table 10, the hall size, base station (BS) location, and room height can be set considering an IIoT scenario such as a smart factory. Based on this, the sending and receiving operations of the base station can be verified. However, it is provided only as an example, and the present disclosure may not be limited to the above configuration.

[0187] In detail, the IIoT scenario can consider the dense clutter situation (dense) and the sparse clutter situation in the internal environment. That is, it can be distinguished according to how much clutter there is in the internal environment. Moreover, as an IIoT scenario, the situation where the antenna height is higher than the average clutter height and the situation where the antenna height is lower than the average clutter height can be considered. That is, considering the above situation, the IIoT scenario can be as shown in Table 9 below.

[0188] That is, InF-SL represents a scenario in which a case with sparse clutter is considered, and in which the transmit and receive antennas of the base station have a height lower than the average clutter antenna height in an indoor factory environment such as a smart factory. In addition, InF-DL represents a scenario in which a case with dense clutter is considered, and in which the transmit and receive antennas of the base station have a height lower than the average clutter antenna height in an indoor factory environment such as a smart factory.

[0189] Meanwhile, InF-SH represents a scenario taking into account a case with sparse clutter, where the transmitting or receiving antenna of the base station has a height higher than the average clutter antenna height in an indoor factory environment such as a smart factory. In addition, InF-DH represents a scenario taking into account a case with dense clutter, where the transmitting or receiving antenna of the base station has a height higher than the average clutter antenna height in an indoor factory environment such as a smart factory.

[0190] In addition, InF-HH represents a scenario that considers a situation in which, in an indoor factory environment, such as a smart factory, both the transmitting and receiving antennas of a base station have heights higher than an average clutter antenna height regardless of clutter density.

[0191] Here, clutter refers to a form in which base stations are densely arranged at regular intervals within a certain space. For example, clutter can be implemented in an internal environment using 18 base stations as shown in Table 10, but it is provided only as an example and the present disclosure is not limited thereto.

[0192] In addition, as described above, in the scenario, the clutter density and antenna height between the base station and the clutter are considered because the positioning technology used to meet the various performance requirements (accuracy, latency, network / UE efficiency, etc.) required for positioning may change slightly as the characteristics of the radio waves or interference change accordingly.

[0193] However, in actual applications, a general positioning technology that can cover all requirements in the above five scenarios can be applied. The positioning technology to be described below is applicable to all five scenarios. That is, positioning can be performed by applying the following positioning technology to be described here to all IIoT devices operating based on NR in an indoor factory environment (such as a smart factory).

[0194] [Table 9]

[0195]

[0196] [Table 10]

[0198]

[0199] Below, a method of generating a positioning reference signal (PRS) taking into account the positioning requirements required by considering the aforementioned IIoT scenarios and new applications is described.

[0200] Fig. 9 A method for performing positioning based on observed time difference of arrival (OTDOA) to which the present invention is applicable is shown.

[0201] OTDOA can be a method of measuring position by tracking signals transmitted to a ground station via a communication satellite in an LTE and / or NR system. That is, OTDOA is based on measuring the arrival time difference between wireless signals sent at various locations. For example, multiple cells can send a reference signal (RS) and the UE can receive the reference signal. Since the distance between each of the multiple cells and the location of the UE is different, the arrival time of the reference signal sent from each of the multiple cells received at the UE may be different. Here, the UE can calculate the time difference of the signal received from each cell, and can send the calculated information to the network. The network can combine the time difference with the antenna position information of each cell to calculate the position of the UE. Here, at least three cells can be used to measure the position of the UE.

[0202] In addition, for example, the difference in time points at which the UE receives a reference signal from each of a pair of base stations (gNodeB / eNodeB) is defined as a reference signal time difference (hereinafter, RSTD). Here, the position measurement of RSTD can be performed based on the downlink signal. The UE can estimate the position based on the TDOA measurement of the special reference signal received from the other base station (gNodeB / eNodeB).

[0203] Fig.10 The control plane and user plane configuration diagram of the NR positioning protocol (NRPP) to which the present disclosure can be applied are shown. For example, the positioning technology can be defined as at least one of enhanced cell ID (E-CID), observed time difference of arrival (OTDOA), and A-Global Navigation Satellite System (GNSS). Here, the above positioning technology can support positioning solutions for both the control plane and the user plane. The positioning function based on LTE and / or NR network can be supervised by the location management function (LMF). Here, control plane positioning and user plane positioning can be performed by LMF. Here, LMF can be controlled at the network level and can interact with the base station through a mobility entity (e.g., access and mobility management function (AMF)).

[0204] As another example, the positioning function based on the LTE and / or NR network may be controlled under the supervision of the Evolved Serving Mobile Positioning Center (E-SMLC) / Secure User Plane Positioning (SUPL) Positioning Platform (SLP) based on the LTE Positioning Protocol (LPP). Here, positioning may be performed on the control plane by the E-SMLC, and positioning may be performed on the user plane by the SLP, and each may be controlled at the network level and may interact with the base station through a mobility entity (e.g., a mobility management entity (MME)).

[0205] For example, in an LTE system, positioning can be performed by downlink-based position estimation, or positioning can be performed by cell ID-based, time-difference-based position estimation. In an NR system, positioning can be performed by considering DL-based position estimation (e.g., PRS) and UL-based position estimation (e.g., SRS for positioning). In addition, positioning can be performed by a positioning operation based on the signal exchange time of multiple cells as a round-trip time (RTT) or by a positioning operation based on a cell ID. In addition, positioning can be performed by a positioning operation based on the time difference between received signals. In addition, since the new communication system performs communication based on beams, positioning operations can be performed based on the angle difference of each beam. The downlink / uplink reference signals and UE / base station operations as described above can be shown in Tables 11 and 12 below.

[0206] [Table 11]

[0207]

[0208] [Table 12]

[0209]

[0211] Here, the terms in Table 11 and Table 12 may be as follows.

[0212] RSTD (Reference Signal Time Difference)

[0213] RSRP (Reference Signal Received Power)

[0214] RTOA (Relative Time of Arrival)

[0215] RSRQ (Reference Signal Received Quality)

[0216] RSRPB (Received Reference Signal Power per Branch)

[0217] Radio Resource Management

[0218] CSI-RS (Channel State Information Reference Signal)

[0220] Here, RSTD may represent the transmission time difference between reference signals, and RTOA may represent the relative time value of signal arrival. Positioning may be performed based on the location information of the transmission point by calculating the relative time difference value based on the location of the transmission point that sends the reference signal and the transmission time difference. In addition, RSRP represents the power of the received reference signal, and RSRPB represents the strength of the reference signal measured at each branch. RSRQ represents the quality of the received reference signal. By verifying the power and quality of the received reference signal through RSRP and RSRQ, it is possible to verify whether the positioning operation is possible. In addition, RRM represents the performance of resource management and verification of resources used for positioning.

[0222] In addition, for example, the SRS for positioning may be configured to the uplink reference signal for positioning. However, this is merely a naming for the sake of clarity of description and is not limited to the above-mentioned embodiments. In addition, it may be changed to a different name and applied to a newly proposed communication system, and may also be applied in a form changed according to the new communication system.

[0223] In detail, for example, in an NR system, an SRS for positioning operation may be generated. Here, for "Multiple-Input Multiple-Output SRS (MIMO)", the number of SRS symbols may be 1, 2, or 4. Here, in the case of an SRS for positioning, more SRSs may be required. Therefore, the number of SRS symbols may be 1, 2, 4, 8, or 12. In addition, up to the Nth symbol (N = 0, 1 ... 13) from the very end of the time slot may be used as the position of the SRS symbol. That is, the SRS symbol may be assigned based on the very end of the time slot. In addition, for example, the number of SRS combs may be 2, 4, or 8, which will be described below. In addition, for example, an offset may be applied to the SRS mapping, which may be as shown in Table 13 below.

[0224] [Table 13]

[0225]

[0226] The SRS sequence may be a Zadoff-chu based sequence. For example, the SRS sequence may be generated based on the following equation 3. Here, n represents a subcarrier index, and l' represents a symbol. Here, and pi represents the antenna port. For example, since the SRS used for positioning uses only a single antenna port, the above pi value may be 1. i represents the cyclic shift (CS) value, and α i It can be shown as in the following equations 4 and 5, and based on this, an SRS sequence can be generated. Here, in equation 5, Here, the SRS sequence may maintain orthogonality by shifting the phase based on Equation 4 and Equation 5 below.

[0227] [Equation 3]

[0228]

[0229] [Equation 4]

[0230]

[0231] [Equation 5]

[0232]

[0234] According to the present disclosure, the number of SRS combs may be variously set to 2, 4, or 8. For example, in the case of the following LTE system, the number of combs may be 4, and based on this, 12 CSs may be used. For the number of combs according to the present disclosure, different numbers may be applied and set according to the applied system.

[0235] According to the present disclosure, in the case of considering SRS for positioning in a new communication system, if the comb size is 2, the maximum number of CSs may be 8. Likewise, if the comb size is 4, the maximum number of CSs may be 12. Likewise, since SRS may be used for positioning, comb size = 8 may also be considered.

[0236] For example, the SRS for positioning may only support a single antenna port. The SRS for positioning may not support frequency hopping, and the frequency axis assignment may support 4 PRBs to 272 PRBs in units of 4 PRBs. In addition, in the case of the SRS for positioning, the aperiodic feature may be supported in the same manner as the aperiodic SRS. Information about antenna ports, frequency hopping, frequency assignment, and periodicity may be indicated by higher layer signaling.

[0237] In the case of SRS for positioning, IIoT scenarios or use cases need to be considered to meet the requirements. For this, a method to increase orthogonality or reduce overhead may be required.

[0238] To this end, the number of symbols of the SRS used for positioning may be 1, 2, 4, 8, or 12. In addition, the comb size used for positioning may be 2, 4, or 8. Here, the SRS may be a Zadoff-chu sequence and may be a sequence based on a phase shift. Here, the CS may be a phase shift value, and each value that is phase shifted based on the CS value may maintain orthogonality.

[0239] In addition, for example, the UE may configure parameters for SRS for positioning based on higher layer signaling. Specifically, the UE may configure the SRS by using an SRS resource set for positioning (e.g., "SRS-PosResourceSet-r16") as the higher parameter. Here, the SRS resource set parameter for positioning may include an SRS resource set ID parameter for positioning (e.g., srs-PosResourceSetId-r16). Here, the SRS resource set ID parameter (e.g., srs-PosResourceSetId-r16) may include a resource set ID. In addition, the SRS resource set parameter for positioning may include an SRS resource list parameter for positioning (e.g., srs-PosResourceIdList-r16). Here, the SRS resource list parameter for positioning may include a list of resource IDs in the SRS resource set. In addition, the SRS resource set parameter for positioning may include a resource type parameter (e.g., resourceType-r16). Here, the SRS resource set parameter for positioning may include information about whether the resource is non-periodic, semi-persistent, or periodic. In addition, the SRS resource set parameters used for positioning may include path loss related parameters (e.g., pathlossReferenceRS-Pos-r16) used for positioning. Here, the path loss related parameters used for positioning may include information about a reference signal, which is used as a reference for path loss. For example, the reference signal used as a reference may be at least one of the following: an SSB of a serving cell, an SSB of a neighboring cell, and a DLPRS, and information about it may be included in the path loss related parameters used for positioning.

[0240] In addition, the UE may configure the SRS resource based on the SRS resource parameter for positioning (e.g., SRS-PosResource-r16) as the higher layer parameter. Here, the SRS resource parameter for positioning may include an SRS resource ID parameter for positioning (e.g., srs-PosResourceId-r16). Here, the SRS resource ID parameter for positioning may include an SRS resource set. In addition, the SRS resource parameter for positioning may include a transmission comb parameter (e.g., transmissionComb-r16). Here, the transmission comb parameter may include information related to the comb to be transmitted. For example, the size of the comb may be one of 2, 4, and 8. In addition, specifically, if the size of the comb is 2, the transmission comb parameter may indicate a comb offset (combOffset) and a cyclic prefix (combOffset) value, and similarly, for example, if the size of the comb is 4, the transmission comb parameter may indicate a comb offset (combOffset) and a cyclic prefix (combOffset) value. Similarly, for example, if the size of the comb is 8, the transmission comb parameter may indicate a comb offset (combOffset) and a cyclic prefix (combOffset) value.

[0241] In addition, the SRS resource parameters for positioning may include a resource mapping parameter (e.g., resourceMapping-r16). Here, the resource mapping parameter may indicate the SRS transmission start symbol in the time slot. Here, the transmission start symbol may be 0 to 13. In addition, the resource mapping parameter may indicate the number of symbols. For example, the number of symbols may be one of 1, 2, 4, 8, and 12.

[0242] The SRS resource parameters used for positioning may include a frequency domain shift parameter (eg, freqDomainShift-r16). Here, the frequency domain shift parameter may be information related to a starting resource block (RB). For example, the RB may be 0 to 268.

[0243] In addition, the SRS resource parameters for positioning may include a group or sequence hopping parameter (e.g., groupOrSequenceHopping-r16). Here, the group or sequence hopping parameter may include information on whether to perform group hopping for the SRS sequence, whether to perform sequence hopping, whether to perform both hopping, or whether not to perform both hopping.

[0244] In addition, the SRS resource parameters for positioning may include a resource type parameter (e.g., resourceType-r16). Here, the resource type parameter may include information about whether the resource is aperiodic, semi-persistent, or periodic. For example, when the resource is aperiodic, the resource type parameter may include slot offset information. As another example, when the resource is semi-periodic or periodic, the resource type parameter may include period and offset information.

[0245] The SRS resource parameter used for positioning may include a sequence ID parameter (eg, sequenceId-r16). Here, the sequence ID parameter may include SRS sequence ID information.

[0246] In addition, the SRS resource parameters used for positioning may include SRS spatial relationship parameters (e.g., SRS-SpatialRelationInfoPos-r16). Here, the SRS spatial relationship parameters may include information about a reference signal, which is used as a reference for the spatial relationship. For example, the reference signal used as a reference may be at least one of the SSB of the serving cell, the SSB of the neighboring cell, and the DL PRS. In addition, when the SSB is the reference signal used as a reference, the SRS spatial relationship parameters may also include a cell ID and SSB index information.

[0248] For example, in a new communication system (e.g., NR), a method and apparatus for performing positioning using a side link may be provided. For example, a UE performing side link communication may perform side link communication based on at least one of in-coverage, out-of-coverage, and partial coverage. In addition, for example, as described above, side link communication may support vehicle to everything (V2X), public safety, commercial services, and IIoT.

[0249] In addition, for example, positioning based on the side link may be performed. Here, positioning may be performed based on at least one of arrival time difference (TDOA), round trip time (RTT), angle of arrival (AOA), angle of departure (AOD), and reference signal time difference (RSTD), but may not be limited thereto. As another example, measurements for side link positioning may be used by combining with measurements for positioning based on another RAT (e.g., Uu-based measurements), but are not limited to a specific embodiment.

[0250] In addition, for example, in the case of sidelink positioning based on a new system, it is necessary to determine signal design, resource allocation, measurement, and related process steps according to the physical layer of the reference signal used for sidelink positioning, which will be further described below. In addition, for example, a method of reusing an existing reference signal or a reference signal-related process for sidelink positioning can be used, which will be described below. Below, a method for performing sidelink-based positioning based on the above is described.

[0251] Fig.11 A method for performing sidelink-based positioning applicable to the present disclosure is shown.

[0252] refer to Fig.11 , sidelink-based positioning can be performed. As a specific example, in Fig.11 11, UE A 1120, UE B 1130, and UE C 1140 may be present within the coverage of base station 1110. For example, each of UE A 1120, UE B 1130, and UE C 1140 may be in an RRC connection state with base station 1110, but the present disclosure is not limited thereto. Here, the position of UE D 1150 may be measured based on sidelink positioning.

[0253] Here, for example, side link communication between UE A 1120 and UE D 1150 is possible. As another example, UE A 1120, UE B 1130, UE C 1140, and UE D 1150 may perform side link communication based on group communication based on multicast. For example, UE A 1120 may be a master terminal in the group communication, but the present disclosure is not limited to the above example.

[0254] In addition, for example, for the sake of clarity, the following description is made based on the above situation, but may not be limited thereto. Fig.11 , the base station 1110 may send allocation information to each of UE A 1120, UE B 1130, and UE C 1140. Here, the allocation information may be information required for UE D 1150 that requires position measurement to send a side link sounding reference signal (SL SRS). For example, the allocation information may include at least one of resource information and sequence information required for UE D 1150 to send the SL SRS, and may also include other information.

[0255] Here, for example, the allocation information may be transmitted from the base station 1110 to each of the UE A 1120, the UE B 1130, and the UE C 1140 through upper layer signaling (e.g., RRC). Here, for example, the allocation information may be allocated by the location server, and the allocated information may be transmitted to each UE through the base station 1110, which may not be limited to a specific embodiment.

[0256] Then, UE A 1120 may transmit allocation information to UE D 1150. Here, the allocation information may be information required for UE D 1150 to transmit the SL SRS. Here, for example, each of UE A 1120, UE B 1130, and UE C 1140 may receive the SL SRS transmitted from UE D 1150. Here, for example, UE A 1120 may transmit the allocation information to UE D 1150 through at least one of a physical sidelink control channel (PSCCH) and a physical sidelink shared channel (PSSCH), which is not limited to a specific embodiment. Then, UE D 1150 may transmit the SL SRS, and each of UE A 1120, UE B 1130, and UE C 1140 may receive the SL SRS transmitted from UE D 1150.

[0257] Then, each of UE A 1120, UE B 1130, and UE C 1140 may perform measurement based on the SL SRS and may obtain measurement information. Then, each of UE A 1120, UE B 1130, and UE C 1140 may send the measurement information to the base station 1110. Here, the measurement information may be at least one of the arrival time difference (TDOA) and the reference signal time difference (RSTD) as the value measured by each UE based on the SL SRS, but may not be limited thereto. For example, each of UE A 1120, UE B 1130, and UE C 1140 may send the measurement value to the base station 1110. Then, the base station 1110 may obtain the position value of UE D 1150 based on the measurement value received from each UE. As another example, the measurement information may be the position value of UE D 1150 calculated based on the SL SRS sent from UE D 1150. That is, the measurement information may be the measurement value itself, or may be a location value of the UE D 1150 derived based on the measurement value, which may not be limited to a specific form. In addition, for example, the base station 1110 may also transmit the measurement information to a location server. However, the present disclosure may not be limited thereto. In the above manner, positioning may be performed.

[0258] Fig.12 A method for performing sidelink-based positioning applicable to the present disclosure is shown.

[0259] refer to Fig.12 , sidelink-based positioning can be performed. As a specific example, in Fig.12 , UE A 1220, UE B 1230, and UE C 1240 may be present within the coverage of the base station 1210. For example, each of UE A 1220, UE B 1230, and UE C 1240 may be in an RRC connection state with the base station 1210, but the present disclosure is not limited thereto. Here, the position of UE D 1250 may be measured based on sidelink positioning.

[0260] Here, for example, side link communication may be performed between UE A 1220 and UE D 1250. As another example, UE A 1220, UE B 1230, UE C 1240, and UE D 1250 may perform side link communication based on group communication based on multicast. For example, UE A 1220 may be a master terminal in group communication, but the present disclosure is not limited to the above embodiment.

[0261] In addition, for example, for the sake of clarity, the following description is made based on the above situation, but may not be limited thereto. Fig.12 , UE D 1250 may send request information to UE A 1220. Here, the request information may be information requesting location measurement of UE D 1250. Then, UE A 1220 may send request information to the base station 1210 based on the request information acquired from UE D 1250. Here, for example, the base station 1210 may deliver the received request information to a location server, but the present disclosure is not limited to the above embodiment.

[0262] Then, the base station 1210 may send the allocation information about the SL SRS to each UE based on the request information. As another example, the base station 1210 may receive the allocation information about the SL SRS from the location server based on the request information, and transmit the allocation information based on this. The present disclosure is not limited to the above embodiments.

[0263] Then, the base station 1210 may send allocation information to each of UE A 1220, UE B 1230, and UE C 1240. Here, the allocation information may be information required for UE D 1250 that requires location measurement to send SL SRS. For example, the allocation information may include at least one of resource information and sequence information required for UE D 1250 to send SL SRS, and may also include other information.

[0264] Here, for example, the allocation information may be transmitted from the base station 1210 to each of UE A 1220, UE B 1230, and UE C 1240 through upper layer signaling (e.g., RRC). Here, for example, the allocation information may be allocated by a location server, and the allocated information may be transmitted to each UE through the base station 1210, which may not be limited to a specific embodiment.

[0265] Then, UE A 1220 may send the allocation information to UE D 1250. Here, the allocation information may be information required for UE D 1250 to send the SL SRS. Here, for example, each of UE A 1220, UE B 1230, and UE C 1240 may receive the SL SRS sent from UE D 1250. Here, for example, UE A 1220 may send the allocation information to UE D 1250 through at least one of the PSCCH and the PSSCH, which is not limited to a specific embodiment. Then, UE D 1250 may send the SL SRS, and each of UE A 1220, UE B 1230, and UE C 1240 may receive the SL SRS sent from UE D 1250.

[0266] Then, each of UE A 1220, UE B 1230, and UE C 1240 may perform measurement based on SL SRS, and may acquire measurement information. Then, each of UE A 1220, UE B 1230, and UE C 1240 may send measurement information to base station 1210. Here, the measurement information may be at least one of TDOA and RSTD as a value measured by each UE based on SL SRS, but may not be limited thereto. For example, each of UE A 1220, UE B 1230, and UE C 1240 may send a measurement value to base station 1210. Then, base station 1210 may acquire a location value of UE D 1250 based on the measurement value received from each UE. As another example, the measurement information may be a location value of UE D 1250 calculated based on the SL SRS sent from UE D 1250. That is, the measurement information may be the measurement value itself, or may be a location value of UE D 1250 derived based on the measurement value, which may not be limited to a specific form. In addition, for example, the base station 1210 may further transmit the measurement information to a location server. However, the present disclosure may not be limited thereto. In the above manner, positioning may be performed.

[0267] Fig.13 A method for performing sidelink-based positioning applicable to the present disclosure is shown.

[0268] refer to Fig.13 , sidelink-based positioning can be performed. As a specific example, in Fig.13 In the example, UE A 1320 may be within the coverage of the base station 1310. For example, UE A 1320 may be in an RRC connection state with the base station 1310, but the present disclosure may not be limited thereto. Here, the position of UE D 1350 may be measured based on the positioning of the side link.

[0269] Here, for example, sidelink communication may be performed between UE A 1320 and UE B 1330, sidelink communication may be performed between UE A 1320 and UE C 1340, and sidelink communication may be performed between UE A 1320 and UE D 1350. As another example, UE A 1320, UE B 1330, UE C 1340, and UE D 1350 may perform sidelink communication based on group communication based on multicast. For example, UE A 1320 may be a master terminal in group communication, but the present disclosure is not limited to the above examples.

[0270] In addition, for example, for the sake of clarity, the following description is made based on the above situation, but may not be limited thereto. Fig.13 , the base station 1310 may send allocation information to the UE A 1320. Here, the allocation information may be information necessary for the UE D 1350 that needs location measurement to send the SL SRS. For example, the allocation information may include at least one of resource information and sequence information required for the UE D 1350 to send the SL SRS, and may also include other information.

[0271] Here, for example, the allocation information may be transmitted from the base station 1310 to the UE A 1320 through upper layer signaling (e.g., RRC). Here, since the UE A 1320 exists within the coverage of the base station 1310 and is in an RRC connection state, the UE A 1320 may receive the allocation information from the base station 1310. In addition, for example, the allocation information may be allocated by a location server, and the allocated information may be transmitted to each UE through the base station 1310, which may not be limited to a specific embodiment.

[0272] Then, UE A 1320 may send the allocation information to each of UE B 1330 and UE C 1340. Here, the allocation information may be information necessary for UE D 1350 that requires position measurement to send SL SRS. For example, the allocation information may include at least one of resource information and sequence information required for UE D 1350 to send SL SRS, and may also include other information. That is, each of UE B 1330 and UE C 1340 may receive the above allocation information from UE A 1350 to receive SL SRS from UE D 1350. Here, for example, UE A 1320 may send the allocation information to each of UE B 1330 and UE C 1340 through at least one of PSCCH and PSSCH. In addition, UE A 1330 may send the allocation information to UE D 1350. That is, UE A 1330 may pass the allocation information as information required for UE D 1350 to send SL SRS. Here, for example, UE A 1320 may transmit the allocation information to UE D 1350 through at least one of PSCCH and PSSCH, which is not limited to a specific embodiment. As described above, UE D 1350 may transmit the SL SRS, and each of UE A 1320, UE B 1330, and UE C 1340 may receive the SL SRS transmitted from UE D 1350.

[0273] Then, each of UE A 1320, UE B 1330, and UE C 1340 may perform measurement based on the SL SRS, and may obtain measurement information. Here, each of UE B 1330 and UE C 1340 may send the measurement information to UE A 1320. Here, the measurement information may be at least one of TDOA and RSTD as a value measured by each UE based on the SL SRS, but may not be limited thereto. For example, the measurement information may be the measurement value itself, or may be a location value of UE D 1350 derived based on the measurement value, which may not be limited to a specific form. In more detail, UE A 1320 may obtain a measurement value measured based on the SL SRS from each of UE B 1330 and UE C 1340 as the measurement information. Here, UE A 1320 may obtain a location value of UE D 1350 based on the measurement values ​​obtained from UE B 1330 and UE C 1340. Here, UE A 1330 may transmit the location value of UE D 1350 as measurement information to the base station 1310. Here, the base station 1310 may report the measurement information as the location value of UE D 1350 to the location server, which may not be limited to a specific embodiment.

[0274] As another example, UE A 1320 may acquire a measurement value measured based on the SL SRS from UE B 1330 and UE C 1340 as measurement information. Here, UE A 1320 may transmit the measurement value measured based on the SL SRS by UE A 1320 and the measurement value acquired from UE B 1330 and UE C 1340 to the base station 1310. Here, the base station 1310 may acquire a location value of UE D 1350 based on the measurement values ​​of UE A 1320, UE B 1330, and UE C 1340. For example, the base station 1310 may report the measurement information as the location value of UE D 1350 to a location server, which may not be limited to a specific embodiment.

[0275] As another example, UE A 1320 may obtain a location value of UE D 1350 derived based on a measurement value of SL SRS measurement from UE B 1330 and UE C 1340 as measurement information, and may also send it to the base station 1310. For example, the base station 1310 may report the measurement information as the location value of UE D 1350 to a location server, which may not be limited to a specific embodiment. In the above manner, positioning may be performed.

[0276] Fig.14 A method for performing sidelink-based positioning applicable to the present disclosure is shown.

[0277] refer to Fig.14 , sidelink-based positioning can be performed. As a specific example, in Fig.14 In the example, UE A 1420 may be within the coverage of base station 1410. For example, UE A 1420 may be in an RRC connection state with base station 1410, but the present disclosure is not limited thereto. Here, the position of UE D 1450 may be measured based on sidelink positioning.

[0278] Here, for example, sidelink communication may be performed between UE A 1420 and UE B 1430, sidelink communication may be performed between UE A 1420 and UE C 1440, and sidelink communication may be performed between UE A 1420 and UE D 1450. As another example, UE A 1420, UE B 1430, UE C 1440, and UE D 1450 may perform sidelink communication based on group communication based on multicast. For example, UE A 1420 may be a master terminal in group communication, but is not limited to the above example.

[0279] In addition, for example, for the sake of clarity, the following description is made based on the above situation, but may not be limited thereto. Fig.14 , UE D 1450 may send request information to UE A 1420. Here, the request information may be information requesting location measurement of UE D 1450. Then, UE A 1420 may send request information to base station 1410 based on the request information obtained from UE D 1420. Here, for example, base station 1410 may deliver the received request information to a location server, but the present disclosure is not limited to the above example.

[0280] Then, the base station 1410 may transmit the allocation information about the SL SRS to each UE based on the request information. For another example, the base station 1410 may receive the allocation information about the SL SRS from the location server based on the request information, and send the allocation information based on this, but the present invention is not limited to the above example.

[0281] Reference Fig.14 , the base station 1410 may send allocation information to the UE A 1420. Here, the allocation information may be necessary information for the UE D 1450 that needs position measurement to send the SL SRS. For example, the allocation information may include at least one of resource information and sequence information required for the UE D 1450 to send the SL SRS, and may also include other information.

[0282] Here, for example, the allocation information may be transmitted from the base station 1410 to the UE A 1420 through upper layer signaling (e.g., RRC). Here, since the UE A 1420 exists within the coverage of the base station 1410 and is in an RRC connection state, the UE A 1420 may receive the allocation information from the base station 1410. Here, for example, the allocation information may be allocated by a location server, and the allocated information may be transmitted to each UE through the base station 1410, which may not be limited to a specific embodiment.

[0283] Then, UE A 1420 may send the allocation information to each of UE B 1430 and UE C 1440. Here, the allocation information may be information necessary for UE D 1450 that requires position measurement to send SL SRS. For example, the allocation information may include at least one of resource information and sequence information required for UE D 1450 to send SL SRS, and may also include other information. That is, each UE B 1430 and UE C 1440 may receive the above configuration information from UE A 1450 to receive SL SRS from UE D 1450. Here, for example, UE A 1420 may send the allocation information to each of UE B 1430 and UE C 1440 through at least one of PSCCH and PSSCH, which is not limited to a specific embodiment. In addition, UE A1430 may send the allocation information to UE D 1450. That is, UE A1430 may transmit the allocation information as information required for UE D 1450 to send SL SRS. Here, for example, UE A 1420 may transmit the allocation information to UE D 1450 through at least one of PSCCH and PSSCH, which is not limited to a specific embodiment. As described above, UE D 1450 may transmit SL SRS, and each of UE A 1420, UE B 1430, and UE C 1440 may receive SL SRS transmitted from UE D 1450.

[0284] Then, each of UE A 1420, UE B 1430 and UE C 1440 may perform measurement based on SL SRS and may obtain measurement information. Here, each of UE B 1430 and UE C 1440 may send the measurement information to UE A 1420. Here, the measurement information may be at least one of TDOA and RSTD as a value measured by each UE based on SLSRS, but may not be limited thereto. For example, the measurement information may be the measurement value itself, or may be a location value of UE D 1450 derived based on the measurement value, which may not be limited to a specific form. In more detail, UE A 1420 may obtain the measurement value measured based on SL SRS from UE B 1430 and UE C 1440 as measurement information. Here, UE A 1420 may obtain the location value of UE D 1450 based on the measurement value obtained from UE B 1430 and UE C 1440. Here, UE A 1430 may transmit the location value of UE D 1450 as measurement information to the base station 1410. Here, the base station 1410 may report the measurement information as the location value of UE D 1450 to the location server, which may not be limited to a specific embodiment.

[0285] As another example, UE A 1420 may acquire a measurement value measured based on the SL SRS as measurement information from UE B 1430 and UE C 1440. Here, UE A 1420 may transmit the measurement value measured by UE A 1420 based on the SL SRS and the measurement values ​​acquired from UE B 1430 and UE C 1440 to the base station 1410. Here, the base station 1410 may acquire a location value of UE D 1450 based on the measurement values ​​of UE A 1420, UE B 1430, and UE C 1440. For example, the base station 1410 may report the measurement information as the location value of UE D 1450 to a location server, which may not be limited to a specific embodiment.

[0286] As another example, UE A 1420 may obtain a location value of UE D 1450 derived based on a measurement value of SL SRS measurement from UE B 1430 and UE C 1440 as measurement information, and may also send it to the base station 1410. For example, the base station 1410 may report the measurement information as the location value of UE D 1450 to a location server, which may not be limited to a specific embodiment. In the above manner, positioning may be performed.

[0288] Fig.15 A method for performing sidelink-based positioning applicable to the present disclosure is shown.

[0289] refer to Fig.15 , sidelink-based positioning can be performed. As a specific example, in Fig.15 In the embodiment, positioning can be performed based on sidelink communication between UEs without base station control. For example, the position of UE D 1540 can be measured based on sidelink positioning. Here, for example, sidelink communication can be performed between UE A 1510 and UE B 1520, sidelink communication can be performed between UE A 1510 and UE C 1530, and sidelink communication can be performed between UE A 1510 and UE D 1540. As another example, UE A 1510 can perform sidelink communication based on group communication based on multicast. For example, UE A 1510 can be the master terminal in the group communication, but is not limited to the above example. In addition, for example, for the sake of clarity, the following description is made based on the above configuration, but may not be limited to this. Reference Fig.15 , UE A 1510 may generate allocation information. Here, the allocation information may be information necessary for UE D 1540 that needs location measurement to send SL SRS. For example, the allocation information may include at least one of resource information and sequence information required for UE D 1540 to send SL SRS, and may also include other information.

[0290] Here, for example, UE A 1510 may send the allocation information to each of UE B 1520 and UE C 1530. Here, the allocation information may be information necessary for UE D 1540, which requires position measurement, to send SL SRS. For example, the allocation information may include at least one of resource information and sequence information required for UE D 1540 to send SL SRS, and may also include other information. That is, each of UE B 1520 and UE C 1530 may receive the above allocation information from UE A 1510 to receive SL SRS from UE D 1540. Here, for example, UE A 1510 may send the allocation information to each of UE B 1520 and UE C 1530 through at least one of PSCCH and PSSCH, which is not limited to a specific embodiment. In addition, UE A 1510 may send the allocation information to UE D 1540. That is, UE A 1510 may transmit the allocation information as information required for UE D 1540 to send SL SRS. Here, for example, UE A 1510 may transmit allocation information to UE D 1540 through at least one of PSCCH and PSSCH, which is not limited to a specific embodiment. As described above, UE D 1540 may transmit SL SRS, and each of UE A 1510, UE B 1520, and UE C 1530 may receive SL SRS transmitted from UE D 1540.

[0291] Then, each of UE A 1510, UE B 1520 and UE C 1530 may perform measurement based on the SL SRS, and may obtain measurement information. Here, each of UE B 1520 and UE C 1520 may send the measurement information to UE A 1510. Here, the measurement information may be at least one of TDOA and RSTD as a value measured by each UE based on the SL SRS, but may not be limited thereto. For example, the measurement information may be the measurement value itself, or may be a location value of UE D 1540 derived based on the measurement value, which may not be limited to a specific form. In more detail, UE A 1510 may obtain a measurement value measured based on the SL SRS from each of UE B 1520 and UE C 1530 as measurement information. Here, UE A 1510 may obtain a location value of UE D 1540 based on the measurement values ​​obtained from UE B 1520 and UE C 1530.

[0292] As another example, UE A 1510 may acquire a location value of UE D 1540 derived based on a measurement value of SL SRS measurement as measurement information from UE B 1520 and UE C 1530, which may not be limited to a specific embodiment. In the above manner, positioning may be performed.

[0294] Fig.16 A method for performing sidelink-based positioning applicable to the present disclosure is shown.

[0295] refer to Fig.16 , sidelink-based positioning can be performed. As a specific example, in Fig.16 In the present invention, positioning of the base station is performed based on sidelink communication between UEs rather than based on base station control. For example, the position of UE D 1640 can be measured based on the positioning of the sidelink. Here, for example, sidelink communication can be performed between UE A 1610 and UE B 1620, sidelink communication can be performed between UE A 1610 and UE C 1630, and sidelink communication can be performed between UE A 1610 and UE D 1640. As another example, UE A 1610 can perform sidelink communication based on group communication based on multicast. For example, UE A 1620 can be the master terminal in the group communication, but is not limited to the above example. In addition, for example, for the sake of clarity, the following description is made based on the above situation, but may not be limited to this. Reference Fig.16 , UE D 1640 may send request information to UE A 1610. Here, the request information may be information requesting location measurement of UE D 1640, but is not limited to the above example.

[0296] Then, UE A 1610 may generate allocation information. Here, the allocation information may be information required for UE D 1640 that needs location measurement to send SL SRS. For example, the allocation information may include at least one of resource information and sequence information required for UE D 1640 to send SL SRS, and may also include other information.

[0297] Here, for example, UE A 1610 may send the allocation information to each of UE B 1620 and UE C 1630. Here, the allocation information may be information required for UE D 1640, which requires position measurement, to send SL SRS. For example, the allocation information may include at least one of resource information and sequence information required for UE D 1640 to send SL SRS, and may also include other information. That is, each of UE B 1620 and UE C 1630 may receive the above allocation information from UE A 1610 to receive SL SRS from UE D 1640. Here, for example, UE A 1610 may send the allocation information to each of UE B 1620 and UE C 1630 through at least one of PSCCH and PSSCH, which is not limited to a specific embodiment. In addition, UE A 1610 may send the allocation information to UE D 1640. That is, UE A 1610 may transmit the allocation information as information required for UE D 1640 to send SL SRS. Here, for example, UE A 1610 may transmit the allocation information to UE D 1640 through at least one of PSCCH and PSSCH, which is not limited to a specific embodiment. As described above, UE D 1640 may transmit SL SRS, and each of UE A 1610, UE B 1620, and UE C 1630 may receive the SL SRS transmitted from UE D 1640.

[0298] Then, each of UE A 1610, UE B 1620, and UE C 1630 may perform measurement based on SL SRS and may obtain measurement information. Here, each of UE B 1620 and UE C 1620 may send the measurement information to UE A 1610. Here, the measurement information may be at least one of TDOA and RSTD as a value measured by each UE based on SL SRS, but may not be limited thereto. For example, the measurement information may be the measurement value itself, or may be a location value of UE D 1640 derived based on the measurement value, which may not be limited to a specific form. In more detail, UE A 1610 may obtain the measurement value measured based on SL SRS from UE B 1620 and UE C 1630 as measurement information. Here, UE A 1610 may obtain the location value of UE D 1640 based on the measurement value obtained from UE B 1620 and UE C 1630.

[0299] As another example, UE A 1610 may acquire, as the measurement information, location information of UE D 1640 derived based on a measurement value of SL SRS measurement from UE B 1620 and UE C 1630, which may not be limited to a specific embodiment. In the above manner, positioning may be performed.

[0301] As another example, as mentioned above, reference Figures 11 to 16 , the allocation information may include at least one of resource information and sequence information about the SLSRS transmitted from UE D. Here, for example, regarding SL SRS sequence generation, an existing SRS sequence may be considered, and the existing SRS sequence may be derived based on Equations 3 and 4.

[0302] In addition, for example, the sequence group u of the SRS sequence may be as shown in the following equation 6. Here, the sequence group u and the sequence number v may be determined based on groupOrSequenceHopping as an upper layer parameter. Here, for example, l′ may be As the OFDM symbol number included in the SRS resource.

[0303] [Equation 6]

[0304]

[0305] In addition, for example, when the groupOrSequenceHopping parameter is set to "neither", the sequence group and the sequence number may be set as in the following equation 7. That is, neither the sequence group nor the sequence number may be used. Conversely, when the groupOrSequenceHopping parameter is set to "groupHopping", group hopping may be applied without applying sequence hopping, which may be shown in the following equation 8. Here, the initial value c of the pseudo-random sequence c(i) is init At the start of each radio frame the initial value can be

[0306] [Equation 7]

[0307]

[0308] [Equation 8]

[0309]

[0311] In addition, for example, when the groupOrSequenceHopping parameter is set to "sequenceHopping", only sequence hopping may be applied without applying group hopping, which can be expressed as shown in the following equation 9. Here, the initial value c of the pseudo-random sequence c(i) is init At the start of each radio frame the initial value can be

[0312] [Equation 9]

[0313]

[0315] Here, for example, the groupOrSequenceHopping parameter may be included in the SRS-Resource IE or the SRS-PosResource IE. In addition, the SRS sequence ID may be determined based on the sequenceID as an upper layer parameter. Here, when the sequenceID parameter is included in the SRS-Resource IE, In contrast, when the sequenceID parameter is included in the RS-PosResource IE, That is, in the case of generating an SRS sequence for positioning, the range of the SRS sequence ID can be wider.

[0317] For example, as referenced above Figures 11 to 16 As described above, similar to the existing positioning SRS, the SRS sequence ID of the SL SRS for sidelink positioning can be sent from the base station to the UE through upper layer signaling (eg, upper layer signaling (eg, RRC)). Here, the SRS sequence ID of the SL SRS may include 16 bits, n I S D RS ∈{0,1,…,65535}, which is the same as before. Here, the sequence ID information of SL SRS can be used as the information about Figures 11 to 16 The sequence information of the SRS SL transmitted for the position measurement of the UE D in the UE D is included in the allocation information. Here, for example, the sequence ID of the SL SRS can be allocated from the remaining sequence IDs except the SRS ID allocated for the UL SRS to distinguish it from the existing SRS used for positioning.

[0318] As another example, the above sequence ID information of the SRS may be provided from the base station to the UE via upper layer signaling (eg, RRC). Figures 11 to 14 In the UE, the sequence ID information can be obtained. Fig.15 and 16 As shown in FIG. 1 , a UE that performs sidelink communication without base station control may not be able to obtain SRS ID information. Fig.15 and 16 In the example, the UE needs to determine the SRS ID by itself.

[0319] Here, for example, the SRS ID can be based on the UE D For example, as described above, UE A may determine based on the side link communication between UE A and UE D and based on the received To configure the SRS ID. Here, for example, N X ID It may be the same as the following equation 10 as the decimal number of the CRC of the PSCCH associated with the PSSCH, but it may not be limited thereto. Here, p i represents each parity bit, and L represents the number of parity bits.

[0320] [Equation 10]

[0321]

[0323] Here, N for UE D X ID You can use the modulo 2 16 16-bit SRS ID calculated as a modulo function.

[0324] As another example, based on N X ID For example, since the SRS ID is applied based on the modulo function in Equation 6, the SRS ID may be configured with N bits. X ID Bit.

[0325] As another example, a case where the ID of UE A is used may be considered. Here, the ID of UE A may be an ID included in and indicated in the sidelink assignment (SA). SA ID (side link group destination identifier)', but may not be limited thereto. Here, when the SRS ID is configured based on 16 bits, the SRS ID may be configured by adding 0 to n SA ID As another example, it is possible to SA ID To configure the SRS ID, and because the SRS ID is applied based on the modulo function, n SAID bits to configure the SRS ID.

[0326] As another example, as mentioned above with reference to Figures 11 to 16 The allocation information may include at least one of sequence information and resource information about the SL SRS sent from UE D. Here, for example, regarding the SL SRS resource allocation information, the existing SRS resource allocation parameters may be considered. In more detail, the resource allocation parameters for SL SRS included in the allocation information may be generated based on the above-mentioned SRS-PosResourceSet and SRS-PosResource. For example, the parameters in SL-SRS-PosResourceSet may include parameters based on the parameters in SRS-PosResourceSet as a resource set for the SL SRS for positioning. In addition, for example, the parameters in SL-SRS-PosResource may include parameters based on the parameters in SRS-PosResource as a resource for the SL SRS for positioning.

[0327] Here, SL-SRS PosResourceSet and SL-SRS PosResource need to be distinguished from the existing SRS PosResourceSet and SRS-PosResource for transmission to the base station. Taking this into account, SL-SRSPosResourceSet can be configured separately to be distinguished from SRS PosResourceSet. Here, SL-SRSPosResourceSet can use resources other than the resources (SRS-PosResource) used by SRS PosResourceSets.

[0328] Here, if Figures 11 to 14 As shown in FIG. 1 , when positioning based on a side link is performed based on a base station under the control of the base station, SRS resources for the side link and SRS resources for base station transmission may be allocated separately. Fig.15 and 16 As shown, when the UE generates allocation information without base station control, available resources (SL-SRS-PosResource) used in resources (SL-SRS-PosResourceSet) configured separately from SRS resources to be sent to the base station can be predefined in the UE. Here, the UE can select resources for SL SRS transmission from the available resources (SL-SRS-PosResource) based on the predefined settings.

[0330] In the new communication system, positioning can be performed based on at least one of downlink / uplink, time difference / angle difference, RTT and cell ID. Here, with reference to the downlink PRS (DL PRS) used for positioning, the DL PRS resource set can be configured to a single base station (or transmission reception point (TRP)). Here, the DL PRS resource set can be a collection of DL PRS resources. Each DL PRS resource in the DL PRS resource set can have each corresponding DL PRS resource ID. For example, in a new communication system (such as NR), each base station (or TRP) can perform communication using multiple beams. Here, each DL PRS resource ID can correspond to each corresponding beam sent from a single base station (or TRP). That is, each DL PRS resource in the DL PRS resource set can correspond to each beam.

[0331] Here, the DL PRS configuration may include a DL PRS transmission schedule. The base station (or TRP) may indicate the DL PRS configuration to the UE. Therefore, the UE may verify the DL PRS based on the indicated DL PRS configuration without performing blind detection. The digital parameter configuration for the DL PRS may be the same as the digital parameter configuration for data transmission. For example, the CP length and subcarrier spacing (SCS) for the DL PRS may be the same as the CP length and SCS for data transmission.

[0332] In addition, in one or more base stations (or TRPs), a DL PRS resource set can be sent by positioning the frequency layer. Here, since the DL PRS resource set is sent by the same positioning frequency layer, the SCS, CP type, center frequency, point A, bandwidth and starting physical resource block (PRB) and comb size can be configured to be the same. Here, point A can be a value indicating the position of resource block (RB) 0. The DL PRS resource set can be sent by the same frequency layer. Here, the DL PRS sequence refers to the Gold sequence and can be a binary sequence. This can be the same as the DL PRS of the existing system. The DL PRS sequence ID can be 4096. This can be more than the sequence (1024) used for the cell ID. In addition, the DL PRS can be modulated based on quadrature phase shift keying (QPSK), and the DL PRS can be sent based on a cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) method. In addition, 12 symbols can be configured as the timeline resources of the DL PRS in a single time slot, and for the comb size, up to comb-12 can be supported.

[0333] More details can be shown in Table 14 below. That is, based on the size of the comb, the intervals at which the PRS is assigned on the frequency axis may be different. In the LTE system, DL PRS can be transmitted using all symbols within a single slot. However, in the NR system, which is a new communication system, DL PRS may be transmitted based on different numbers of symbols as shown in Table 14 below.

[0334] [Table 14]

[0335] 2 Symbols 4 Symbols 6 symbols 12 Symbols Comb-2 {0,1} {0,1,0,1} {0,1,0,1,0,1} {0,1,0,1,0,1,0,1,0,1,0,1} Comb - 4 NA {0,2,1,3} NA {0,2,1,3,0,2,1,3,0,2,1,3}} Comb-6 NA NA {0,3,1,4,2,5} {0,3,1,4,2,5,0,3,1,4,2,5} Comb - 12 NA NA NA {0,6,3,9,1,7,4,10,2,8,5,11}

[0337] The DL PRS transmission period may be configured for each DL PRS resource set. For example, each base station (or TRP) may configure multiple DL PRS resource sets. Multiple DL PRS resource sets with different periods may exist in the same base station (or TRP), and the periods may be set differently.

[0338] Resources assigned for DL ​​PRS transmission (hereinafter, DL PRS resources) may be repeated 1, 2, 4, 6, 8, 16, or 32 times. The interval between each repeated DL PRS resource may be set to one of 1, 2, 4, 8, 16, and 32 slots, but is not limited to the above examples.

[0339] Regarding the frequency allocation for DL ​​PRS resources, the granularity of the DL PRS bandwidth may be 4 PRBs. A parameter may be used to indicate the starting PRB to the UE, and the UE may determine the starting PRB based on the indicated parameter. For example, the minimum bandwidth for DL ​​PRS may be 24 PRBs, and the maximum bandwidth may be 272 PRBs.

[0340] Regarding DL PRS, a resource element (RE) offset may be configured on the frequency axis. Here, the RE offset may be configured to have a constant offset on the frequency axis based on a comb pattern, the comb pattern being based on a first symbol of a DL PRS resource. The first symbol may be configured to the UE. Then, the remaining symbols may be configured to the UE. Then, the remaining symbols may be determined based on the first symbol and based on the RE offset.

[0341] Fig.17 Comb patterns suitable for use with the present disclosure are shown.

[0342] Reference Fig.17 , a DL PRS RE pattern is described as an example in the case where the comb size and the number of symbols are the same.

[0343] In more detail, a case where DL PRS is allocated in two symbols (0, 1) as comb size = 2 (comb-2) can be considered. Here, the RE offset may be {0, 1}. That is, DL PRS may be allocated in the first symbol and the second symbol according to the RE offset {0, 1}, and the frequency axis may be assigned based on the comb size 2. A case where DL PRS is allocated in four symbols (0, 1, 2, 3) as comb size = 4 (comb-4) can be considered. Here, the RE offset may be {0, 2, 1, 3}. That is, DL PRS may be allocated in symbols from the first symbol to the fourth symbol according to the RE offset {0, 2, 1, 3}, and the frequency axis may be assigned based on the comb size 4. A case where DL PRS is allocated in six symbols (0, 1, 2, 3, 4, 5) as comb size = 6 (comb-6) can be considered. Here, the RE offset may be {0, 3, 1, 4, 2, 5}. That is, the DL PRS may be allocated in symbols from the first symbol to the sixth symbol according to RE offsets {0, 3, 1, 4, 2, 5}, and the frequency axis may be assigned based on the comb size 6.

[0344] The present invention can support DL PRS muting. When the DL PRS to be muted is indicated to the UE, the UE can mute the corresponding DL PRS. Here, a DL PRS muting bitmap for a DL PRS resource set can be configured, and based on this, the DL PRS to be muted can be indicated to the UE. Here, each bit of the DL PRS muting bitmap (hereinafter, option 1 bitmap) can correspond to each opportunity or consecutive moment (instances) in the DL PRS resource set. Here, when a specific bit indicates muting, all DL PRSs within the opportunity or consecutive moment corresponding to the specific bit can be muted.

[0345] In addition, the bitmap indicating silence (hereinafter, option 2 bitmap) may indicate silence for each DL PRS resource at one time or multiple times in a period. Each bit of the bitmap may correspond to a repetition index of each DL PRS resource at a time or time in a period. That is, each bit may correspond to a repetition of a DL PRS in each single DL PRS period, and silence may be indicated by each bit. For example, the bitmap may be set to one of 2, 4, 8, 16, and 32 bits.

[0346] Regarding the muting option, at least one of the option 1 bitmap and the option 2 bitmap may be configured. For example, only the option 1 bitmap may be configured. In addition, for example, only the option 2 bitmap may be configured. In addition, for example, all the option 1 bitmaps and the option 2 bitmaps may be configured. Here, when all the option 1 bitmaps and the option 2 bitmaps are configured, all DL PRS resources within the timing indicated as muted based on option 1 may be muted, and DL PRS resources indicated as muted by the option 2 bitmap in the timing not indicated as muted by the option 1 bitmap may be muted.

[0347] In a new communication system (such as NR), a DL PRS may be generated and positioning may be performed. Here, referring to Table 14 above, there may be 12 completely orthogonal resources in a single time slot. Here, when DL PRS is allocated in two symbols as comb size = 2 (comb-2), the number of orthogonal resources may be two, and six may be additionally distinguished based on symbol offset. In addition, when DL PRS is allocated in four symbols as comb size = 4, the number of orthogonal resources may be four, and three may be additionally distinguished based on symbol offset. In addition, when DL PRS is allocated in six symbols as comb size = 6 (comb-6), the number of orthogonal resources may be six, and two may be additionally distinguished based on symbol offset. In addition, when DL PRS is allocated in 12 symbols as comb size = 12 (comb-12), the number of orthogonal resources may be 12, and only one may be distinguished based on symbol offset.

[0348] Regarding DL PRS, in the new communication system, up to 64 TRPs can be supported in a single frequency layer, and 64 resources can be assigned to each TRP. Taking this into account, the DL PRS ID can be 4096 (64*64).

[0349] For example, considering the scenarios in Tables 9 and 10 above as the case where the UE operates in a frequency band of 120kHz based on the IIoT scenario, 18 TRPs can be supported. Here, considering that each TRP supports 64 beams, each of the 64 resources can be supported for the DL PRS. Therefore, the total number of resources required may be 1152 (=18*64). Here, the fully orthogonal resources within a single time slot may be 12 symbols, so considering the 1152 resources, 96 (1152 / 12=96) time slots may be required. Here, 96 time slots may correspond to 12ms at 120kHz.

[0350] Meanwhile, considering the IIoT scenario, as mentioned above, the positioning-related delay requirement may be set to 10 ms or less. Therefore, if (96) time slots corresponding to the above 12 ms are used, the delay requirement (10 ms) may not be met. That is, a method for efficiently assigning DL PRS resources may be required.

[0351] Fig.18 and Fig.19 A method for performing a cyclic prefix based on a DL PRS allocation mode applicable to the present disclosure is shown. When a frequency axis cyclic prefix and a time axis cyclic prefix are performed, the orthogonality of the DL PRS allocation mode may be destroyed. Therefore, when a cyclic prefix is ​​performed based on a DL PRS allocation mode, only a frequency axis cyclic prefix is ​​possible.

[0352] Reference Fig.18 , when {0,3,1,4,2,5} is a pattern in which DLPRS is allocated in six symbols as a case where the comb size is 6, six patterns are possible by the frequency axis cyclic prefix. Fig.18 It can be the resource allocation method when f=0 and when f=2.

[0353] Reference Fig.19 , when {0,6,3,9,1,7,4,10,2,8,5,11} is a pattern in which DL PRS is allocated in 12 symbols as a case where the comb size is 12, 12 patterns are possible by the frequency axis cyclic prefix. Fig.19 It can be the resource allocation method when f=0 and when f=2.

[0354] Fig. 20 A DL PRS resource allocation method applicable to the present disclosure is shown.

[0355] In a communication system according to the present disclosure, DL PRS muting may be supported. When a DL PRS to be muted is indicated to a UE, the UE may mute the corresponding DL PRS. Here, a DL PRS muting bitmap for a DL PRS resource set may be configured, and based on this, a DL PRS to be muted may be indicated to the UE. Here, each bit of the DL PRS muting bitmap (hereinafter, option 1 bitmap) may correspond to each opportunity or continuous moment in a DL PRS resource set. Here, each DL PRS opportunity may correspond to all DL PRS resources (including repeated transmissions) within each DL PRS period. That is, a single DL PRS opportunity may correspond to one DL PRS period.

[0356] When a specific bit indicates silence, all DL PRSs within the timing or continuous moments corresponding to the specific bit can be silenced. For example, as described above, the DL PRS of the existing system (LTE) can be silenced based on the timing. As another example, a bitmap indicating silence (hereinafter, option 2 bitmap) can indicate silence for each DL PRS resource within the timing or moment of a period. Here, each bit of the bitmap can correspond to the repetition index of each DL PRS resource within the timing or moment of a period (that is, each bit corresponds to a single repetition of the DL PRS within each single DL PRS), and silence can be indicated by each bit. Here, the bitmap can be set to one of 2, 4, 8, 16 and 32 bits.

[0357] For example, regarding the muting option, at least one of the option 1 bitmap and the option 2 bitmap may be configured. For example, only the option 1 bitmap may be configured. In addition, for example, only the option 2 bitmap may be configured. For example, all of the option 1 bitmap and the option 2 bitmap may be configured. Here, when all the option 1 bitmaps and the option 2 bitmaps are configured, all DL PRS resources within the timing indicated as muting based on option 1 may be muted, and the DL PRS resources indicated as muting by the option 2 bitmap in the timing not indicated as muting may be muted.

[0358] refer to Fig. 20 (a), the UE may verify the DL PRS period and offset indicated based on the DL PRS configuration. Fig. 20 In (a), the period is configured to have 10 time slots and the offset is configured to have two time slots, but this is merely an example and is not limited to the above example. In addition, the UE can verify the repetition pattern of the DL PRS resources within the period by "DL-PRS-ResourceRepetitionFactor" indicated based on the DL PRS configuration. Moreover, although the "DL-PRS-ResourceRepetitionFactor" is configured to indicate two repetitions, this is merely an example and is not limited to the above example. The UE can verify the time interval between DL PRS resources within a period by "DL-PRS-ResourceTimeGap" indicated based on the DL PRS configuration. For example, in Fig. 20 In (a), the "DL-PRS-ResourceTimeGap" is configured to have a single time slot, but this is just an example and is not limited to the above example.

[0359] refer to Fig. 20(b), the UE may perform silence based on the option 1 bitmap. For example, the option 1 bitmap may be a silence bitmap for two time periods with 2 bits, and each bit corresponds to a time corresponding to a time period. Here, the UE may perform silence at the corresponding time based on each bit. In addition, for example, the option 2 bitmap may be 2 bits, and within a time period, the repetition of each DL PRS may correspond to each bit.

[0360] When muting is indicated to the UE based on the option 1 bitmap, the UE can recognize that all DL PRSs of the corresponding timing are muted, and can perform positioning. On the other hand, in the case of the option 2 bitmap, the DL PRS to be muted indicated by the option 2 bitmap can be muted within the timing when muting is not indicated to the UE. That is, the UE can perform positioning only for the DL PRS that is not indicated to be muted by all option 1 bitmaps and option 2 bitmaps among the DL PRSs. As a detailed embodiment, in Fig. 20 In (b), each of the DL PRS opportunities 1410-1, 1410-2, 1410-3, and 1410-4 may correspond to each PRS period. Here, the first DL PRS opportunity 1410-1 may correspond to "period #0", the second DL PRS opportunity 1410-2 may correspond to "period #1", the third DL PRS opportunity 1410-3 may correspond to "period #2", and the fourth DL PRS opportunity 1410-4 may correspond to "period #3".

[0361] Since each bit of the option 1 bitmap corresponds to a DL PRS opportunity, the option 1 bitmap may be 2 bits. Here, if the bit corresponding to the first DL PRS opportunity 1410-1 in the 2-bit option 1 bitmap corresponding to the first DL PRS opportunity 1410-1 and the second DL PRS opportunity 1410-2 indicates muting, all DL PRS resources 1420-1 and 1420-2 within the first DL PRS opportunity 1410-1 are muted. In addition, if the bit corresponding to the second DL PRS opportunity 1410-2 in the 2-bit option 1 bitmap indicates muting, all DL PRS resources 1420-3 and 1420-4 within the second DL PRS opportunity 1410-2 are muted.

[0362] Meanwhile, if the bit corresponding to the third DL PRS opportunity 1410-3 in the 2-bit option 1 bitmap corresponding to the third DL PRS opportunity 1410-3 and the fourth DL PRS opportunity 1410-4 indicates muting, all DL PRS resources 1420-5 and 1420-6 within the third DL PRS opportunity 1410-3 are muted. In addition, if the bit corresponding to the fourth DL PRS opportunity 1410-4 in the 2-bit option 1 bitmap indicates muting, all DL PRS resources 1420-7 and 1420-8 within the fourth DL PRS opportunity 1410-4 are muted.

[0363] In addition, repetitions of DL PRS resources may be included in each of the DL PRS opportunities 1410-1, 1410-2, 1410-3, and 1410-4. For example, the first DL PRS opportunity 1410-1 includes two repetitions of DL PRS resources (1420-1 and 1420-2). The second DL PRS opportunity 1410-2 also includes two repetitions of DL PRS resources (1420-3 and 1420-4). The third DL PRS opportunity 1410-3 also includes two repetitions of DL PRS resources (1420-5 and 1420-6), and the fourth DL PRS opportunity 1410-4 also includes two repetitions of DL PRS resources (1420-7 and 1420-8).

[0364] Here, each bit of the option 2 bitmap may correspond to a repetition of each DL PRS resource. Therefore, within the first DL PRS opportunity 1410-1, the option 2 bitmap is configured with 2 bits by two repetitions (1420-1 and 1420-2) of the DL PRS resource.

[0365] Here, if the option 1 bitmap indicates that the first DL PRS opportunity 1410-1 is to be muted, both repetitions (1420-1 and 1420-2) of the DL PRS resource are muted regardless of the option 2 bitmap. On the other hand, if the option 1 bitmap indicates that the first DL PRS opportunity 1410-1 is not to be muted, the option 2 bitmap indicates the muting of both repetitions (1420-1 and 1420-2) of the DL PRS resource. Here, if the bit corresponding to the first repetition (1420-1) of the DL PRS resource in the 2-bit option 2 bitmap indicates muting, the corresponding DL PRS resource 1420-1 is muted. In addition, if the bit corresponding to the second repetition (1420-2) in the 2-bit option 2 bitmap indicates muting, the corresponding DL PRS resource 1420-2 is muted. When the option 1 bitmap indicates not to be muted, the option 2 bitmap may be applied.

[0366] In addition, for example, Fig.21The structure of the NR side link time slot to which the present disclosure is applicable is shown.

[0367] refer to Fig.21 , a single side link (SL) time slot includes a single automatic gain control (AGC) symbol. In addition, a single SL time slot includes a single Tx-Rx switching symbol. In a single SL time slot, at least one subchannel (e.g., Fig.21 In the case of two subchannels, the PSSCH as a data transmission channel is transmitted. In addition, in the time domain, the PSCCH (1st SCI), the 2nd SCI, the PSSCH (data), and the DMRS for demodulation may be transmitted to the remaining OFDM symbols except the AGC symbol and the Tx-Rx switching symbol. In detail, the positions of the PSCCH (1st SCI), the 2nd SCI, the PSSCH (data), and the DMRS for demodulation may be as follows: Fig.21 As shown, but not limited to this. For example, in Fig.21 In , PSCCH and the second SCI exist in the first subchannel, and considering this, PSSCH and DMRS can be allocated. As another example, in Fig.21 In the embodiment, the second subchannel is a subchannel in which there is no PSCCH and the second SCI, and the PSSCH and DMRS can be as follows Fig.21 Assigned as shown.

[0368] Here, the number of OFDM of PSSCH DMRS can be set to one or more according to the higher layer configuration. PSCCH (1st SCI) uses DMRS of PSCCH (i.e., PSCCH DMRS) to receive and decode, and every four resource elements are equally allocated and transmitted within a single resource block (RB). On the other hand, the 2nd SCI is decoded using PSSCH DMRS.

[0369] In addition, for example, frequency division multiplexing (FDM), time division multiplexing (TDM), and space division multiplexing (SDM) can all be supported in a single resource pool associated with the NR side link. That is, in a single resource pool, each resource can be divided and used based on frequency, time, and space, thereby improving resource efficiency.

[0370] In addition, a digital parameter configuration and waveform for the side link may be considered, which may be as shown in Table 15 below. In detail, regarding PSSCH / PSCCH and PSFCH in the side link, the SCS and CP length supported in each of FR1 and FR2 may be as shown in Table 15 below. Here, the waveform may support only OFDM without supporting DFT-S-OFDM, but may not be limited thereto. A side link synchronization signal block (SL-SSB) may be independently defined for each frequency range, which may be similar to NR-Uu.

[0371] [Table 15]

[0372]

[0374] Fig. 22 FIG. 2 shows a NR side link resource pool configuration to which the present disclosure can be applied. Fig. 22 , the resource pool may represent the time and frequency resources for sidelink transmission and reception. For example, at least one resource pool may be configured within a single SL BWP within a single carrier. Here, the resources of the resource pool may be configured based on the time resources of a time slot set unit and the frequency resources of a continuous subchannel set unit. In addition, the resource pool may be configured for each of transmission and reception.

[0375] In more detail, as a time resource for resource pool configuration provided in the NR side link, at least one of the following may be configured: a resource pool time period, a side link time slot set (sl-TimeResource (length = L) within a single resource pool application duration), bitmap )), the first symbol of a set of consecutive symbols within a single time slot, and the number of consecutive symbols. As frequency resources, at least one of the following can be configured: the bandwidth of one subchannel (for example, sl-SubchannelSize = {10, 15, 20, 25, 50, 75 and 100} RB), the entire bandwidth indicated by the number of consecutive subchannels (a set of consecutive subchannels) (for example, sl-NumSubchannel = {1~27}), and the position of the first subchannel of the resource pool in the frequency domain (sl-StartRBCnelChannel = {0~265}). For example, resources in the time domain and frequency domain can be configured based on higher layer parameters. In Fig. 22 In the embodiment, the frequency resources corresponding to the excluded RBs may represent some remaining RBs that do not completely match the subchannel size (i.e., do not correspond to the number of RBs constituting a single subchannel). Here, the corresponding resources may not be used in the NR side link. In addition, for example, in the case where a plurality of units of the length of the bitmap (e.g., sl-TimeResource) on the time resource is not established, the reserved time slots may represent the remaining time slots and may not be used as NR side link resources.

[0377] Hereinafter, a method of performing positioning based on a sidelink (SL) PRS is described above.

[0378] For example, at least one SL resource pool may be configured within a single SL BWP within a single carrier. Here, the resources of the SL resource pool may be configured based on the time resources of the time slot set unit and the frequency resources of the continuous subchannel set unit. Here, as the time resources for the SL resource pool configuration, at least one of the following may be configured: the SL resource pool time period, the side link time slot set (SL-TimeResource (length = L_bitmap)) within the application duration of a single SL resource pool, the first symbol of a continuous symbol set within a single time slot, and the number of continuous symbols, which are described above. Here, side link communication may be performed through the above-mentioned side link time slot set and the symbols within the time slot set.

[0379] For example, the SL PRS may be allocated taking into account the side link time slot set (SL-TimeResource (length = L_bitmap)) within the SL resource pool application duration. Since the side link communication can be performed only in the available time slots indicated by the side link time slot set (SL-TimeResource (length = L_bitmap)), the SL PRS may also be assigned taking into account the side link time slot set (SL-TimeResource (length = L_bitmap)). For example, the side link time slot set (sl-TimeResource (length = L_bitmap)) may be set to one of 10 bits to 160 bits. That is, when the side link time slot set (SL-TimeResource (length = L_bitmap)) includes 10 bits, the SL resource may be indicated for 10 time slots by indicating a single time slot per bit. When the side link time slot set (sl-TimeResource (length = L_bitmap)) includes 160 bits, 160 time slots may be indicated by indicating a single time slot per bit.

[0380] Here, the SL PRS configuration may include a SL PRS transmission schedule and may be configured to the UE. Thus, the UE may verify the SL PRS based on the indicated SL PRS configuration without performing blind detection. The digital parameter configuration of the SL PRS may be the same as the digital parameter configuration of the sidelink data transmission. For example, the CP length and SCS for the SL PRS may be the same as the CP length and SCS for the sidelink data transmission.

[0381] For example, based on the SL PRS configuration, a SL PRS resource set may be configured to a single UE for SL PRS allocation for sidelink positioning. Here, a SL PRS resource set may be a collection of SL PRS resources. Each SL PRS resource in a SL PRS resource set may have each corresponding SL PRS resource ID. In addition, a SL PRS period may be configured for each SL PRS resource set, and all SL PRS allocations within the corresponding SL PRS resource set may have the same period. In addition, for example, multiple SL PRS resource sets may be configured to a single UE.

[0382] Here, the period P for SL PRS assignment may be as shown in the following equation 11. In detail, the period P for SL PRS allocation may be determined by considering the side link time slot set (SL-TimeResource (length = L_bitmap)) as the time resource of the SL resource pool. When the side link time slot set (SL-TimeResource (length = L_bitmap)) is applied to the SL resource pool, the side link communication may use the time slot corresponding to the part corresponding to "1" as the side link resource, and the SL PRS allocation may also be performed only on the corresponding resource. In view of the above, the SL PRS allocation may also be determined taking into account the side link time slot set (SL-TimeResource (length = L_bitmap)). Therefore, the SL PRS allocation period P may be configured as shown in equation 11. Here, A may be an integer from 1 to M. Since the maximum value of the side link time slot set (sl-TimeResource (length = L_bitmap)) may be 160 bits, M may be as high as 128 (160×128=20480). Here, since in 15kHz SCS, a time slot may be 1ms, only 10240 time slots may be supported. In 15kHz SCS, it may be as high as 64 (160*64=10240). As another example, A may be set to 2 n That is, A can be set to 1, 2, 4, 8, 16, ..., 2 n , and the maximum value of A can be 2 n =128. Here, in the case of 15kHz SCS, the maximum value of A can be 2 n =64.

[0383] That is, the period P for SL PRS assignment may be determined considering L_bitmap as a side link time slot set.

[0384] [Equation 11]

[0385] P=A·L_bitmap

[0387] In addition, for example, the SL PRS muting bitmap may be configured in the SL PRS resource set. In detail, when the UE is indicated that the SL PRS is to be muted, the UE may mute the corresponding SL PRS. Here, an SL PRS muting bitmap for the SL PRS resource set may be configured, and based on this, the UE may be indicated that the SL PRS is to be muted. Here, each bit of the SL PRS muting bitmap (hereinafter, option 1 bitmap) may correspond to each opportunity or continuous moment within the SL PRS resource set. Here, when a specific bit indicates muting, all SL PRSs within the opportunity or continuous moment corresponding to the specific bit may be muted.

[0388] In addition, a bitmap indicating silence (hereinafter, option 2 bitmap) may indicate silence for each SL PRS resource at one time or multiple times in a time period. Each bit of the bitmap may correspond to a repetition index of each SL PRS resource at the one time or multiple times in a time period. That is, each bit may correspond to a repetition of the SL PRS within each single SL PRS time period, and silence may be indicated by each bit. For example, the SL PRS resource may be repeated 1, 2, 4, 6, 8, 16, or 32 times. The interval between the repeated corresponding SL PRS resources may be configured to be one of 1, 2, 4, 8, 16, and 32 time slots, but is not limited to the above examples. With regard to the silence option, at least one of the option 1 bitmap and the option 2 bitmap may be configured. For example, only the option 1 bitmap may be configured. In addition, for example, only the option 2 bitmap may be configured. In addition, for example, all option 1 bitmaps and option 2 bitmaps may be configured. Here, when all option 1 bitmaps and option 2 bitmaps are configured, all SL PRS resources in the timings indicated as being muted can be muted based on option 1, and SL PRS resources indicated as being muted by the option 2 bitmap in the timings not indicated as being muted by the option 1 bitmap can be muted.

[0389] Here, the bitmap may be set to one of 2, 4, 8, 16, and 32 bits. For example, the above-mentioned PRS opportunity or continuous time may correspond to one period P shown in the above equation 11.

[0390] Here, when the value of P is determined as shown in the above equation 11, the period P may not be repeated based on the bitmap unit (2 / 4 / 8 / 16 / 32) throughout the duration, and there may be a portion that is not indicated by the bitmap. In detail, for example, a case can be considered where, of 20480 time slots, 4480 time slots 1) are not uplink time slots, 2) are SSB time slots, or 3) are reserved time slots, and the remaining time slots excluding the time slots excluded from the SL resources are 16000. Based on equation 11, in the case of applying P = A·L_bitmap = 100 time slots, there may be 160 opportunities based on 16000 time slots out of 20480 time slots. Here, the opportunity may indicate SLPRS silence based on the repeated application of the bitmap unit (2 / 4 / 8 / 16 / 32), and the period P and the bitmap unit are divisible numbers, so there may be no problem in the indication. However, as another example, when 3480 time slots are excluded as 1) non-uplink time slots, 2) SSB time slots, or 3) reserved time slots out of 20480 time slots, resource assignment for the remaining 17000 time slots may be considered. In the case where P=A·L_bitmap=100 time slots are applied based on equation 11, there may be 170 opportunities based on 17000 time slots out of 20480 time slots. Here, except for 2 of the bitmap cells indicating each opportunity, the remaining cells (4 / 8 / 16 / 32) do not match the time period P. Taking the above into account, the following equation 12 may be considered to apply the option 1 bitmap. In equation 12, B represents the number of opportunities. In addition, k represents a bitmap cell, and int(B / k) represents the number of times the bitmap is repeatedly applied as is. Where int(x) represents an integer value of x, then the bit corresponding to the least significant bit (LSB) of Bk int(B / k) used in the bitmap may be sequentially applied to the remaining opportunities after repeatedly transmitting the bitmap. Through the above, even when there is no period P and the bitmap unit is not divided, it is possible to indicate the resource to be muted.

[0391] In detail, for example, as described above, in the case of using 17000 time slots out of 20480 time slots as resources, B may be 17000 / (A·L_bitmap=100)=170. That is, there may be 170 opportunities. Here, when the bitmap unit is 16 (k=16), the bitmap may be repeated ten (int(170 / 16)) times. That is, a bitmap of length 16 may be repeatedly applied ten times. Then, silence may be indicated by applying the LSB 10 bits of the bitmap of length 16 to ten opportunities. In addition, for example, in the case of a 15kHz SCS in the following equation, 10240 may be applied instead of 20480, which is described above.

[0392] [Equation 12]

[0393] B = (the number of time slots available as side link resources in 20480 time slots) / (A·L_bitmap)

[0395] As another example, in one opportunity with a period P, the SL PRS may be repeatedly allocated and transmitted in 1, 2, 4, 8, 16, and 32 time slots. Here, as described above, the interval between the repeatedly allocated and transmitted SL PRS time slots may be 1, 2, 4, 8, 16, or 32 time slots. Here, when the period P is determined based on Equation 11, the SL PRS may be repeatedly allocated and transmitted in 1, 2, 4, 8, 16, and 32 time slots in one opportunity. However, the SL PRS transmission may indicate that the L_bitmap is repeatedly applied A times in one opportunity based on the period P, and the bit value within the L_bitmap may be limited to the time slot corresponding to "1". That is, the repeated allocation and transmission of the SL PRS may be performed on the time slot that can be used as an SL resource based on the L_bitmap. In addition, the interval between the time slots to which the SL PRS is repeatedly allocated and transmitted may be 1, 2, 4, 8, 16, or 32 time slots. Here, for example, since L_bitmap can be repeatedly applied A times at one time based on time period P, and SL PRS transmission can be performed only on the time slot corresponding to the bit value "1" within L_bitmap, repeated allocation of SL PRS can be performed based on the time slot corresponding to the bit value "1". That is, the above-mentioned repeated allocation and transmission of SLPRS can be performed only for the time slot that can be used as SL resources based on L_bitmap. In addition, the interval between the time slots to which SL PRS is repeatedly allocated and transmitted can indicate the interval between the time slots (i.e., the logically indicated time slots) obtained by respectively collecting the time slots corresponding to the bit value "1" when applying L_bitmap A times.

[0396] As another example, when the SL PRS is repeatedly transmitted based on 2, 4, 8, 16 or 32 in one opportunity with respect to the option 2 silence bitmap as the aforementioned SL PRS-related silence bitmap, the option 2 silence bitmap may be configured as a 2, 4, 8, 16 or 32-bit bitmap. Here, the option 2 silence bitmap may also be applied based on a time slot obtained by separately collecting time slots corresponding to a bit value of "1" (ie, a time slot indicated by logic), and is not limited to a specific embodiment.

[0397] In addition, for example, the UE may select specific resources from the remaining resources excluding the resources occupied and used by another UE from the resources belonging to the SL resource pool. Here, for example, as described above, the time and frequency resources corresponding to the SL PRS transmission time slot may be excluded from the sensing phase. That is, when the UE excludes the resources occupied and used by other UEs from the resources belonging to the SL resource pool, the UE may exclude the time and frequency resources corresponding to the above-mentioned SL PRS transmission time slot from the sensing phase. For example, the following Table 16 may be an operation of the UE sensing resources for side link communication, excluding unavailable resources, and selecting resources, but may not be limited to this. Referring to Table 16, Rx,y represents candidate single slot resources (candidate single subframe resources), S A Represents the set of all possible candidate single time slot resources. Here, the UE can exclude resources occupied by other UEs based on the above-mentioned sensing, which can be as shown in "5)" below. For example, the UE can exclude resources used for the UE to perform transmission from the sensing process. In addition, the UE can exclude reserved resources from the sensing process based on a higher layer configuration or SCI. Here, for example, the UE can exclude time and frequency resources corresponding to the aforementioned SL PRS transmission time slot from the sensing process. That is, the UE can consider the SL PRS transmission time slot in the process of selecting side link resources based on the operation of sensing resources used for side link communication and excluding unavailable resources.

[0398] [Table 16]

[0399]

[0401] Fig.23 1 is a flowchart illustrating a method for determining an SL PRS allocation period based on a side link time slot set bitmap of a side link resource pool that can be applied to the present disclosure. Fig.23, the UE may obtain SL resource pool configuration information (S2310). Here, the resources of the SL resource pool may be configured based on the time resources of the time slot set unit and the frequency resources of the continuous subchannel set unit. As the time resources for the SL resource pool configuration, at least one of the following may be configured: the SL resource pool time period, the side link time slot set (SL-TimeResource (length = L_bitmap)) within the application duration of a single SL resource pool, the first symbol of a continuous symbol set within a single time slot, and the number of continuous symbols, as described above. In addition, for example, the UE may obtain SL PRS configuration information (S2320), and may perform SL PRS transmission (S2330) based on the SL PRS assignment. Here, the SL PRS configuration may include SL PRS transmission scheduling, and may be configured to the UE. Therefore, the UE may verify the SL PRS based on the indicated SL PRS configuration without performing blind detection. The digital parameter configuration of the SL PRS may be the same as the digital parameter configuration of the sidelink data transmission. For example, the CP length and subcarrier spacing (SCS) for the SL PRS may be the same as the CP length and SCS for the sidelink data transmission.

[0402] For example, a SL PRS resource set may be configured to a single UE for SL PRS allocation for sidelink positioning based on the SL PRS configuration. Here, the SL PRS resource set may be a collection of SL PRS resources. Each SL PRS resource in the SL PRS resource set may have each corresponding SL PRS resource ID. In addition, a SL PRS period may be configured for each SL PRS resource set, and all SL PRS allocations within the corresponding SL PRS resource set may have the same period. In addition, for example, multiple SL PRS resource sets may be configured to a single UE.

[0403] Here, SL PRS allocation can be performed by considering the side link time slot set (SL-TimeResource (length = L_bitmap)) within the SL resource pool application duration based on the SL resource pool configuration information. Side link communication can be performed only in the available time slots indicated by the side link time slot set (SL-TimeResource (length = L_bitmap)), so the side link time slot set (SL-TimeResource (length = L_bitmap)) can be considered to assign SL PRS. For example, since the UE identifies the side link time slot set (SL-TimeResource (Length = L_bitmap)) based on the SL resource pool configuration information, the UE can only obtain information about the above-mentioned A value and can determine the SL PRS assignment period, but it is not limited to this.

[0405] Fig.24 The entire sensing-based resource selection and resource pool configuration to which the present disclosure can be applied is shown. Fig.24 , can be used to identify 0 ,nT proc,0) Here, the square brackets "[" are closed intervals and indicate that nT is included. 0 , the brackets ")" are open intervals and do not include nT proc,0 Here, T 0 and nT proc,0 It can be shown in Table 17 below. For example, according to the above description, if a=T 0 =1000·2 u (time slot) and b = T proc,0 =1, the UE can u The sensing window corresponding to the time slot performs sensing. In this way, the UE can verify the resources occupied and used by another UE. The UE can select a specific resource from the resources belonging to the resource pool, from the remaining resources except the resources occupied and used by other UEs.

[0406] [Table 17]

[0407]

[0409] For example, refer to Fig.24 (b), the UE selects TTI n+c, TTI n+e, TTI n+c' and TTI n+e', and performs transmission of control channels and data channels on the selected resources. Here, TTI n+c and TTI n+c' may have corresponding P reserve *j TTIs. For example, when a single TTI represents a single time slot as the target of the above bitmap application, TTI can be P reserve *j time slots. In addition, TTI n+e and TTI n+e' can also have the same reserve *j TTIs (or P*j time slots). Here, for example, P reserve It can indicate the resource reservation interval.

[0410] In detail, for example, P reserve The value of can be determined by higher layer signaling. Here, the value P reserve Can be one of the values ​​corresponding to 0, 1, 2, ..., 99, 100, 200, 300, ..., 1000 ms. For example, P reserve The value of can be indicated as P at the Tx UE rsvp_TX , and Preserve The value of can be indicated as P at the Rx UE rsvp_RX Here, P rsvp_TX and P rsvp_RX It can be a value in ms. rsvp_TX and P rsvp_RX are converted into time slot logic values, they can be represented as P` rsvp_TX and P` rsvp_RX .

[0411] Here, j may be one of the values ​​selected in the range [0, 1, ..., 10] by carrier-specific (or band-specific) network configuration or preconfiguration for V2X. Here, j may be selected and indicated by the "Resourcereservation" signaling field of the SCI included in the SA, but is not limited to the above example. Here, j = 0 may indicate that there is no value of c'. That is, it may indicate that no resources are reserved for the transmission of TB#2 (the second TB) after the TTI corresponding to "P*j" after "TTI n+c".

[0412] Here, refer to Fig.24 (a), in the case of performing full sensing, the 1 ,TTIn+T 2 ]'s resource pool is sensed to select the "TTI n+c" part.

[0413] Here, n≤n+T 1 ≤n+T proc,1 In addition, n+T 2,min ≤n+T 2 ≤n+(remaining packet delay budget). That is, T 1 and T 2 The value of can be determined so that T 1 ≤T proc,1 and T 2,min ≤T 2 ≤(remaining packet delay budget).

[0414] For example, if u = 0 (ie, if SCS = 15 kHz), it can be fixed to be equal to T proc,1 = the value corresponding to 3 time slots. Meanwhile, if u = 1, 2 and 3 (i.e., if SCS = 30kHz, 60kHz and 120kHz), then T proc,1 can be fixed to values ​​corresponding to 5, 9, and 17, respectively. And, T 2,min Can be (pre)configured to work with 5.2 u ,10·2 u or 20.2 uThe value corresponding to each time slot.

[0415] Here, for example, P reserve A value among 0, 1, 2, ..., 99, 100, 200, 300, ..., 1000 ms may be selected as sl-ResourceReservePeriodList. As another example, the UE may configure periodicSensingOccasionResevePeriodList based on higher layer signaling, and may select P from periodicSensingOccasionResevePeriodList. reserve Here, periodicSensingOccasionResevePeriodList may be selected to be up to 16 as a subset of sl-ResourceReservePeriodList.

[0416] In detail, for example, the SL PBPS CPS configuration may be configured to the UE based on a higher layer parameter. Here, a subset of the sl-ResourceReservePeriodList for determining periodic sensing opportunities may be indicated based on the sl-PBPS-OccasionReservePeriodList parameter of the SL PBPS CPS configuration, and one of the period values ​​within the subset may be used. For example, when the sl-PBPS-OccasionReservePeriodList is not configured, the UE may use one of all period values ​​of the sl-ResourceReservePeriodList.

[0417] Here, for example, consider P reserve , the period P of SL PRS allocation can be determined as shown in the following equation 13. In detail, based on Fig.24 , the period P for SL PRS allocation may be determined considering the reserved resources for side link communication. Here, A may be an integer from 1 to M (e.g., 128, 256). As another example, A may be set to 2 n That is, A can be set to 1, 2, 4, 8, 16…2 n For example, A can be 2 n =128,256, but not limited to a specific embodiment.

[0418] [Equation 13]

[0419] P=A*P reserve

[0421] Here, when the value of P is determined as shown in the above equation 13, the period P may not be repeated in the silence bitmap unit (2 / 4 / 8 / 16 / 32) throughout the duration, and there may be a section that the silence bitmap does not indicate. By considering the above, the following equation 14 may be considered to apply the option 1 bitmap. In equation 14, C represents the number of opportunities. Here, the opportunity may correspond to one period P. Also, k represents a bitmap unit. For example, the k bitmap may also be in k*A*P reserve Repeat within a range not exceeding 20480ms. Then, the last one may apply only the bit values ​​up to just before 20480ms in the length k bitmap, and may apply the bit values ​​in the order of the bits corresponding to the LSB.

[0422] Here, based on Equation 14, the number of opportunities may be C, and the bitmap may be repeatedly applied, such as Int(C / k) times. Int(x) represents an integer value of the x value. Then, as the remaining opportunities after repeatedly transmitting the bitmap, the bits corresponding to the LSB in the bitmap may be sequentially applied to C-k_int(C / k). By the above, even when the time period P and the bitmap unit are not divided, it is possible to indicate the resource to be silenced.

[0423] [Equation 14]

[0424] C=(20480ms) / (A·P reserve )

[0426] Fig.25 The time period P based on the present disclosure is shown. reserve Method to perform repeated transfers.

[0427] For example, refer to Fig.25 , based on equation 13, at P = A*P reserve Within a time period, based on N max , in P reserve 1, 2 or 3 SL PRS repetitions can be performed in N. max =1, then P in a period of time reserve One SL PRS transmission can be performed in max =2, then P can be reserve Two SL PRS transmissions are performed in max =3, then P can be reserveFor example, the field "Time gap between initial transmission and retransmission" indicating the time interval between initial transmission and retransmission is in N max =2 can be set to 5 bits, and in N max =3, it can also be set to 9 bits. In addition, the "Retransmission index" field indicating the retransmission status is in N max =2 can be set to 1 bit, and in N max =3, it can be set to 2 bits.

[0428] For details, refer to Fig.25 , in N max = 2, when Gap is the time interval between initial transmission and retransmission 1 (gap 1 ) is 0, the 5-bit "Time gap between initial transmission and retransmission" field value can be set to "00000". 1 The 1-bit "Retransmission index" field may be 1, 2, 3, ... 31, and the above field values ​​may be "00001", "00010", "00011", ..., "11111", respectively. Here, when the 1-bit "Retransmission index" field may indicate the initial transmission of the SL PRS in the case of a first value (e.g., 0), and may indicate the retransmission of the SL PRS in the case of a second value (e.g., 1).

[0429] As N max =3, the time interval between the initial transmission and the second transmission can be considered to be Gap 1 , and the time interval between the second transmission and the third transmission is Gap 2 Here, if Gap 1 and Gap 2 If the Gap is 0, the 9-bit "Time gap between initial transmission and retransmission" field value can be set to "000000000". 1 =1,2,3,…31 and Gap 2 =0, the above field values ​​can be "000000001", "000000010", ..., "000011111" respectively.

[0430] As another example, when Gap 1 <Gap 2 , and Gap 1 and Gap 2 When any two of {1, 2, ..., 31} are selected, the above fields may be set to "000100000", "000100001", "...", "111110000" based on 456 cases. In addition, the 2-bit "Retransmission index" field may indicate the initial transmission of the SL PRS in the case of "00", may indicate the second transmission of the SL PRS in the case of "01", and may indicate the third transmission of the SL PRS in the case of "10".

[0431] Here, for example, P reserve It can be repeatedly applied A times at one time based on a period P, and the repeated transmission can be performed at P reserve Based on N max Therefore, SL PRS can be executed every p reserve In up to N max The SL PRS is repeatedly transmitted in one time slot, and the interval between the repeatedly allocated and transmitted SL PRS time slots can be determined based on the value of the "Time gap between initial transmission and retransmission" field. Based on the above, the number of SL PRS repetitions in one opportunity can be configured to be 1, 2 or 3, and is not limited to a specific embodiment.

[0432] As another example, regarding the silence bitmap of option 2 as the aforementioned SL PRS-related silence bitmap, the SL PRS may be configured to receive a silence bitmap every P in one opportunity. reserve In up to N max is repeatedly transmitted in time slots and corresponds to N max Option 2 silent bitmap can be set. For example, if N max = 1, then option 2 silent bitmap can be set once, if N max = 2, then Option 2 silent bitmap can be set once or twice, and if N max =3, then Option 2 silence bitmap may be set once, twice or three times. Therefore, the corresponding bitmap length may be 2 or 3, but may not be limited thereto.

[0433] In addition, for example, the UE may select a specific resource from among the resources belonging to the SL resource pool, from among the remaining resources excluding the resources occupied and used by another UE. reserveThe SL PRS resources may be post-sensing resources and thus may not be excluded from the sensing phase.

[0435] Fig.26 is a flowchart showing a method for determining an SLPRS allocation period based on a SL resource selected from a side link resource pool through SL resource sensing, to which the present disclosure may be applied. Fig.26 , the UE may exclude unavailable resources by performing SL resource sensing in the SL resource pool, and may perform a SL resource selection operation, which may be as follows Fig.24 Here, based on P reserve To repeat the selected resources. In addition, for example, the UE can obtain SL PRS configuration information (S2620) and can perform SL PRS transmission based on the SL PRS allocation (S2630). Here, the SL PRS configuration may include SL PRS transmission scheduling and can be configured to the UE. Therefore, the UE can verify the SL PRS based on the indicated SL PRS configuration without performing blind detection. The digital parameter configuration of the SL PRS can be the same as the digital parameter configuration of the sidelink data transmission. For example, the CP length and subcarrier spacing (SCS) used for the SL PRS can be the same as the CP length and SCS used for the sidelink data transmission.

[0436] For example, a SL PRS resource set may be configured to a single UE for SL PRS allocation for sidelink positioning based on the SL PRS configuration. Here, the SL PRS resource set may be a collection of SL PRS resources. Each SL PRS resource in the SL PRS resource set may have each corresponding SL PRS resource ID. In addition, a SL PRS period may be configured for each SL PRS resource set, and all SL PRS allocations within the corresponding SL PRS resource set may have the same period. In addition, for example, multiple SL PRS resource sets may be configured to a single UE.

[0437] Here, the time period P of the SL resource selected by SL resource sensing in the SL resource pool may be considered. reserve To perform SL PRS allocation. That is, due to P reserve It can be a period for selecting SL resources for SL transmission, and SL PRS can be sent using the corresponding resources, so the SL PRS allocation period can also be based on P reserve to be determined as described above.

[0439] As another example, SL PRS resources may be configured based on SSB. For example, the UE may obtain SSB configuration information through higher layer signaling. For example, the SSB period may be set to 5, 10, 20, 40, 80, and 160 ms based on the SSB configuration information, but may not be limited thereto. For example, the maximum number of SSBs available in 3 GHz to 6 GHz may be 8, and the maximum number of SSBs available in 6 GHz or higher may be 64. For example, based on 8-bit indication information indicating the presence or absence of eight groups (e.g., GroupPresence) and 8-bit indication information indicating the presence or absence of eight SSB transmissions within a group (e.g., InOnNeGroup), up to 64 SSBs may be sent. That is, the UE may receive SSBs based on the aforementioned information configured through higher layer signaling. In detail, for example, when 8-bit indication information (e.g., groupPresence) is (1 0 0 0 0 0 1) and is configured as 8-bit indication information (e.g., inOnGroup), the index of the SBS actually transmitted in up to 64 SSBs may be numbers 0, 1, 56, and 57. Here, the SSB burst group may be configured within 5 ms and may be repeatedly transmitted based on the above period.

[0440] Here, for example, the period P for SL PRS assignment may be determined based on the following Equation 15. That is, the period may be based on SSB priodicity Here, A may be an integer from 1 to M. Since the maximum SSB period value is 160 ms, M may be a maximum value of 128. As another example, A may be set to 2 n That is, A can be set to 1, 2, 4, 8, 16…2 n , and in the above, the maximum value of A can be 2 n =128. That is, by priodicity Considering the SSB period value, the time period P allocated for the SL PRS can be determined. In detail, for example, the SL PRS can be set based on the SSB period value, and can be transmitted through resources to which the SSB is not transmitted. For example, the SLPRS can be transmitted from a group in which the SSB transmission group does not exist based on 8-bit indication information (e.g., groupPresence) indicating the presence or absence of eight SSB transmission groups. Here, 8-bit separate indication information indicating the presence or absence of the SL PRS transmission group for SL PRS assignment and 8-bit separate indication information indicating the presence or absence of eight SL PRS transmissions within the group can be configured to the UE through high-layer signaling, but it may not be limited to the corresponding example.

[0441] In detail, the PRS opportunity or continuous moment may correspond to a time period P in the following equation 15. The SL PRS may be repeated in one opportunity, and since there are up to 64 SSBs in one SSB cycle, there may be up to A·64 SSBs in one opportunity. Here, the remaining time slots except for the time slots to which the SSBs are actually allocated from the 64 SSBs (i.e., the time slots corresponding to the bit value "1" in the groupPresence bitmap and the inOnGroup bitmap) may be used for SL PRS transmission. Therefore, it is necessary to indicate whether SL PRS transmission is performed on the remaining time slots. To this end, an 8-bit separate indication information may be configured, which corresponds to groupPresence and indicates the presence or absence of an SL PRS transmission group, so as to indicate the presence or absence of SL PRS transmission. In addition, an 8-bit separate indication information may be configured, which corresponds to inOnGroup and indicates the presence or absence of eight SL PRS transmissions in the group. Here, the above-mentioned bitmap may indicate "1" or "0" only for the remaining time slots except the time slots to which the SSB is transmitted (i.e., the time slots corresponding to the bit value "1" in the groupPresence bitmap and the inOnGroup bitmap). For example, the bit value of the bitmap of the SL PRS corresponding to the bit value "1" in both the groupPresence bitmap and the inOnGroup bitmap based on SSB transmission may always be 0.

[0442] [Equation 15]

[0443] P=A·SSB priodicity

[0445] In addition, for example, the SL PRS muting bitmap can be configured in the SL PRS resource set. In detail, when the UE is indicated that the SL PRS is to be muted, the UE can mute the corresponding SL PRS. Here, the SL PRS muting bitmap for the SL PRS resource set can be configured, and based on this, the UE can be indicated that the SL PRS is to be muted. Here, the SL PRS muting bitmap can consider the above-mentioned option 1 bitmap and option 2 bitmap. In detail, each bit of the option 1 bitmap can correspond to each opportunity or continuous moment in the SL PRS resource set. Here, when a specific bit indicates silence, all SL PRSs within the opportunity or continuous moment corresponding to the specific bit can be silenced.

[0446] In addition, the option 2 bitmap may indicate silence for each SL PRS resource at one opportunity or multiple moments in a period. Each bit of the bitmap may correspond to a repetition index of each SL PRS resource at the opportunity or multiple moments in a period. That is, each bit may correspond to a repetition of the SL PRS in each SL PRS period, and silence may be indicated by each bit. Here, the bitmap may be set to one of 2, 4, 8, 16, and 32 bits. For example, the above-mentioned PRS opportunity or continuous moment may correspond to a period P of the above equation 15, and when the value of P is determined as shown in the above equation 15, the period P is considered during the entire duration of the SSB priodicity The value of , therefore, can be repeated based on bitmap units (units of 2, 4, 8, 16, or 32).

[0447] As another example, in the case of SL PRS transmission, ASSB priodicity It may appear at one time based on the period P. Here, as the SL PRS related silence bitmap, the option 2 silence bitmap may determine to silence A as a bitmap. That is, the silence unit of the option 2 silence bitmap may be an SSB period unit, and based on this, silence may be indicated.

[0448] Fig. 27 is a flowchart illustrating a method for determining an SL PRS allocation period based on an SSB to which the present disclosure can be applied. Fig. 27 , the UE may acquire SSB configuration information (S2710). Here, the SSB period may be set to 5, 10, 20, 40, 80, and 160 ms based on the SSB configuration information, but may not be limited thereto. For example, the maximum number of SSBs available in 3 GHz to 6 GHz may be 8, and the maximum number of SSBs available in 6 GHz or higher may be 64. For example, based on 8-bit indication information indicating the presence or absence of eight groups (e.g., GroupPresence) and 8-bit indication information indicating the presence or absence of eight SSB transmissions within the group (e.g., InOnNeGroup), up to 64 SSBs may be sent. That is, the UE may receive the SSB based on the aforementioned information configured through higher layer signaling. Here, for example, the time period P for SL PRS allocation may be determined based on the above-mentioned Equation 15. That is, the time period may be based on the SSB priodicityTo determine. For example, the UE may obtain SLPRS configuration information (S2720) and may perform SL PRS transmission based on the SL PRS assignment (S2730). Here, the SL PRS configuration may include SL PRS transmission scheduling and may be configured to the UE. Therefore, the UE may verify the SL PRS based on the indicated SL PRS configuration without performing blind detection. The digital parameter configuration of the SL PRS may be the same as the digital parameter configuration of the sidelink data transmission. For example, the CP length and subcarrier spacing (SCS) for the SL PRS may be the same as the CP length and SCS for the sidelink data transmission.

[0449] For example, a SL PRS resource set may be configured to a single UE for SL PRS allocation for sidelink positioning based on the SL PRS configuration. Here, the SL PRS resource set may be a collection of SL PRS resources. Each SL PRS resource in the SL PRS resource set may have each corresponding SL PRS resource ID. In addition, a SL PRS period may be configured for each SL PRS resource set, and the SL PRS allocations within the corresponding SL PRS resource set may have the same period. In addition, for example, multiple SL PRS resource sets may be configured to a single UE.

[0450] Here, SL PRS allocation can consider SSB based on SSB configuration information priodicity For example, as mentioned above, SSB priodicity Indicates the SSB transmission cycle and can be priodicity The SLPRS is transmitted through resources to which the SSB is not assigned.

[0451] Fig.28 is a diagram showing the configuration of a base station device and a terminal device according to the present disclosure.

[0452] The base station device 2800 may include a processor 2820 , an antenna device 2812 , a transceiver 2814 , and a memory 2816 .

[0453] The processor 2820 may perform baseband-related signal processing and may include an upper layer processing unit 2830 and a physical (PHY) layer processing unit 2840. The upper layer processing unit 2830 may process the operation of the MAC layer, the RRC layer, or more upper layers. The PHY layer processing unit 2840 may process the operation of the PHY layer (e.g., uplink received signal processing, downlink transmitted signal processing, etc.). In addition to performing baseband-related signal processing, the processor 2820 may also control the overall operation of the base station device 2800.

[0454] The antenna device 2812 may include at least one physical antenna. If the antenna device 2812 includes multiple antennas, multiple input multiple output (MIMO) transmission and reception may be supported. The transceiver 2814 may include a radio frequency (RF) transmitter and an RF receiver. The memory 2816 may store information processed by the processor 2820, software, operating system (OS), applications, etc. associated with the operation of the base station device 2800, and may include components such as a buffer.

[0455] The processor 2820 of the base station device 2800 may be configured to implement the operations of the base station in the embodiments described herein.

[0456] The terminal device 2850 may include a processor 2870, an antenna device 2862, a transceiver 2864, and a memory 2866. For example, the terminal device 2850 may communicate with the base station device 2800. As another example, the terminal device 2850 may perform side link communication with another terminal device. That is, the terminal device 2850 of the present invention is any device capable of communicating with at least one of the base station device 2800 and other terminal devices, and is not limited to communicating with a specific device.

[0457] The processor 2870 may perform baseband-related signal processing and may include an upper layer processing unit 2880 and a PHY layer processing unit 2890. The upper layer processing unit 2880 may process the operations of the MAC layer, the RRC layer, or more upper layers. The PHY layer processing unit 2890 may process the operations of the PHY layer (e.g., downlink received signal processing, uplink transmitted signal processing, etc.). In addition to performing baseband-related signal processing, the processor 2870 may also control the overall operation of the terminal device 2850.

[0458] The antenna device 2862 may include at least one physical antenna. If the antenna device 2862 includes multiple antennas, MIMO transmission and reception may be supported. The transceiver 2864 may include an RF transmitter and an RF receiver. The memory 2866 may store operation processing information of the processor 2870, software, OS, applications, etc. associated with the operation of the terminal device 2850, and may include components such as a buffer. For example, the above-mentioned operations may be performed based on the base station 2800 and the terminal device 2850. Figures 1 to 19 operations and may not be limited to specific examples.

[0459] The various examples herein are used to explain representative aspects of the present disclosure, rather than describing all possible combinations and contents described in the various examples, which may be applied independently or may be applied by at least two combinations thereof.

[0460] In addition, various examples of the present disclosure may be implemented by hardware, firmware, software, or a combination thereof. In the case of being implemented by hardware, these examples may be implemented by 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.

[0461] The scope of the present invention includes software or machine-executable instructions (e.g., operating systems, applications, firmware, programs, etc.) for enabling operations according to the methods of various embodiments, as well as devices or non-transitory computer-readable media executable on a computer storing such software or instructions.

[0463] Industrial Applicability

[0464] The following content may apply to other systems.

Claims

1. A method for performing sidelink positioning in a wireless communication system, the method comprising: Obtain side link (SL) resource pool configuration information; Obtain side link positioning reference signal SL PRS configuration information; as well as Based on the SL PRS allocation, the SL PRS is sent.

2. A method for performing sidelink positioning in a wireless communication system, the method comprising: Based on side link (SL) resource sensing, selecting a SL resource from a SL resource pool; Obtain side link positioning reference signal SL PRS configuration information; as well as Based on the SL PRS allocation, the SL PRS is sent.

3. A method for performing sidelink positioning in a wireless communication system, the method comprising: Get synchronization signal block SSB configuration information; Obtain side link positioning reference signal SL PRS configuration information; as well as Based on the SL PRS allocation, the SL PRS is sent.

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