Method and apparatus for transmitting and receiving wireless signal in wireless communication system

Abstract

According to at least one example disclosed herein, a method by which a first device performs positioning-related measurements in a wireless communication system may involve the steps of: transmitting device capability information informing the first device that the first device is operable as a positioning reference unit (PRU) providing a positioning reference position; receiving configuration information on a measurement to be performed by the first device as a PRU; and reporting a measurement performed by the PRU on the basis of the configuration information to the network, in which the measurement report is performed for all reference signal resources included in the configuration information on the basis of the first device operating as the PRU, and the measurement report for all reference signal resources includes information on reference signal resources for which measurement fails.

Description

Technical Field

[0001] The present disclosure relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting and receiving wireless signals. Background Art

[0002] In general, wireless communication systems are developing to cover a wide range in various ways to provide communication services such as audio communication services, data communication services, etc. Wireless communication is a multiple access system that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmission power, etc.). For example, the multiple access system can be any of a code division multiple access (CDMA) system, a frequency division multiple access (FDMA) system, a time division multiple access (TDMA) system, an orthogonal frequency division multiple access (OFDMA) system, and a single carrier frequency division multiple access (SC-FDMA) system. Summary of the invention

[0003] Technical issues

[0004] An object of the present disclosure is to provide a method and apparatus for efficiently performing a wireless signal transmission / reception process.

[0005] Those skilled in the art will understand that the objectives that can be achieved using the present disclosure are not limited to those specifically described above, and the above and other objectives that can be achieved by the present disclosure will be more clearly understood from the following detailed description.

[0006] Technical Solution

[0007] In one aspect of the present disclosure, a method for performing positioning-related measurements by a first device in a wireless communication system is provided herein. The method may include the following steps: sending device capability information to a network for informing that the first device can operate as a positioning reference unit (PRU) that provides a reference position for positioning; receiving configuration information about measurements to be performed by the first device as a PRU; and reporting to the network the measurements of the PRU performed based on the configuration information. Based on the first device operating as a PRU, measurement reporting may be performed for all reference signal resources included in the configuration information, and the measurement report for all reference signal resources may include information about reference signal resources for which measurement failures occurred.

[0008] The information on the reference signal in which the measurement failure occurs may include at least one of a measurement failure indication and a measurement failure cause.

[0009] The measurement report for all reference signal resources may include phase measurement values ​​for the remaining reference signal resources except the reference signal resource where the measurement failed. Each phase measurement value may be expressed as mod(2πfcτ0,2π), where fc represents the carrier frequency, τ0 represents the propagation delay of the reference signal, and mod represents the modulo operation.

[0010] The configuration information may include information about the measurement duration of the PRU and information about a resource set for all reference signal resources.

[0011] The measurements of the PRU may include carrier phase measurements (CPM) for positioning of a target user equipment (UE).

[0012] The location of the PRU may be known to the network, and the CPM of the PRU may be related to the correction of the CPM error of the target UE.

[0013] The measurements of the PRU may also include different types of measurements than CPM. The different types of measurements may be related to at least one of time of arrival (ToA), time difference of arrival (TDOA), subcarrier phase measurement (ScPM), angle of departure (AoD), or angle of arrival (AoA).

[0014] The reference signal resource is a downlink positioning reference signal (PRS) resource, and the first device may be a UE.

[0015] In another aspect of the present disclosure, a computer-readable recording medium is provided herein, on which a program for executing the above-mentioned signal measuring method is recorded.

[0016] In another aspect of the present disclosure, a first device configured to perform the above signal measurement method is provided.

[0017] The first device may further include a transceiver, and the first device may be a UE operating in a wireless communication system.

[0018] The first device may be a processing device configured to control a UE operating in a wireless communication system.

[0019] In another aspect of the present disclosure, a method for receiving a measurement report from a first device by a second device in a wireless communication system is provided herein. The method may include the following steps: receiving device capability information from the first device informing that the first device can operate as a PRU that provides a reference position for positioning; sending configuration information about measurements to be performed by the first device as a PRU; and receiving a measurement report of the PRU performed based on the configuration information from the first device. The measurement report of the PRU may include measurement results for all reference signal resources included in the configuration information, and the measurement results for all reference signal resources may include information about the reference signal resources where measurement failures occurred.

[0020] In another aspect of the present disclosure, a second apparatus configured to perform the above-mentioned reception of the measurement report is provided herein.

[0021] Beneficial Effects

[0022] According to the embodiments of the present disclosure, a wireless signal transmission / reception process may be performed accurately and efficiently.

[0023] Those skilled in the art will appreciate that the effects that can be achieved using the present disclosure are not limited to those specifically described above, and other advantages of the present disclosure will be more clearly understood from the following detailed description in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Physical channels used in a 3rd Generation Partnership Project (3GPP) system as an exemplary wireless communication system and a general signal transmission method using the same are shown.

[0025] Figure 2 Shows the radio frame structure.

[0026] Figure 3 A resource grid showing time slots.

[0027] Figure 4 An exemplary mapping of physical channels in time slots is shown. Figure 1 Physical channels used in a 3rd Generation Partnership Project (3GPP) system as an exemplary wireless communication system and a general signal transmission method using the same are shown.

[0028] Figure 2 Shows the radio frame structure.

[0029] Figure 3 A resource grid showing time slots.

[0030] Figure 4 An exemplary mapping of physical channels in time slots is shown.

[0031] Figure 5 An exemplary physical downlink shared channel (PDSCH) reception and acknowledgement / negative acknowledgement (ACK / NACK) transmission process is shown.

[0032] Figure 6 An exemplary physical uplink shared channel (PUSCH) transmission process is shown.

[0033] Figure 7 An example of setting a positioning protocol is shown.

[0034] Figure 8 An example of OTDOA is shown.

[0035] Fig. 9 An example of multiple RTT is shown.

[0036] Fig.10 The operation process of a network node (eg, an upper node of a UE or LMF) according to an embodiment is shown.

[0037] Fig.11 The operation process of the UE performing positioning measurement is shown.

[0038] Fig.12 It is a diagram for explaining operations of a UE and a network according to an embodiment.

[0039] Fig.13 is a diagram for explaining the operation of the first device according to the embodiment.

[0040] Fig.14 2 is a diagram for explaining the operation of the second device according to the embodiment.

[0041] Figures 15 to 18 An example of the communication system 1 and the wireless device applicable to the present disclosure is shown. DETAILED DESCRIPTION

[0042] Embodiments of the present disclosure are applicable to various wireless access technologies such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), and single carrier frequency division multiple access (SC-FDMA). CDMA can be implemented as a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented as a radio technology such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA can be implemented as a radio technology such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wireless Fidelity (Wi-Fi)), IEEE 802.16 (Worldwide Interoperability for Microwave Access (WiMAX)), IEEE 802.20, and Evolved UTRA (E-UTRA). UTRA is part of Universal Mobile Telecommunications System (UMTS). 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a part of Evolved UMTS (E-UMTS) using E-UTRA, and LTE-Advanced (A) is an evolved version of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolved version of 3GPP LTE / LTE-A.

[0043] As more and more communication devices require greater communication capacity, enhanced mobile broadband communications relative to traditional radio access technologies (RATs) are needed. In addition, large-scale machine-type communications (MTC), which can provide various services anytime and anywhere by connecting multiple devices and objects, is another important issue to be considered in the next generation of communications. Discussions are also underway to design communication systems that take into account services / UEs that are sensitive to reliability and latency. Therefore, discussions are underway to introduce new radio access technologies that take into account enhanced mobile broadband communications (eMBB), massive MTC, and ultra-reliable low-latency communications (URLLC). In the embodiments of the present disclosure, for simplicity, this technology will be referred to as NR (new radio or new RAT).

[0044] For the sake of brevity, 3GPP NR is mainly described, but the technical concept of the present disclosure is not limited thereto.

[0045] For background information, definitions of terms, and abbreviations related to the present disclosure, the following documents are incorporated by reference.

[0046] -38.211: Physical channels and modulation

[0047] -38.212: Multiplexing and channel coding

[0048] -38.213: Physical layer procedures for control

[0049] -38.214: Physical layer procedures for data

[0050] -38.215: Physical layer measurements

[0051] -38.300: NR and NG-RAN general description

[0052] -38.304: User Equipment (UE) procedures in idle mode and RRC inactive state

[0053] -38.321: Medium Access Control (MAC) Protocol Specification

[0054] -38.331: Radio Resource Control (RRC) protocol specification

[0055] -37.213: Introduction of channel access procedures for unlicensed spectrum for NR-based access

[0056] -36.355: LTE positioning protocol

[0057] -37.355: LTE positioning protocol

[0058] Terms and abbreviations

[0059] -5GC: 5G core network

[0060] -5GS: 5G system

[0061] -AoA: Angle of Arrival

[0062] -AP: Access Point

[0063] -CID: Cell ID

[0064] -E-CID: Enhanced Cell ID

[0065] -GNSS: Global Navigation Satellite System

[0066] -GPS: Global Positioning System

[0067] -LCS: Location Service -LMF: Location Management Function -LPP: LTE Positioning Protocol -MO-LR: Mobile Originated Location Request -MT-LR: Mobile Terminated Location Request -NRPPa: NR Positioning Protocol A

[0068] -OTDOA: Observed Time Difference of Arrival -PDU: Protocol Data Unit -PRS: Positioning Reference Signal -RRM: Radio Resource Management -RSSI: Received Signal Strength Indicator -RSTD: Reference Signal Time Difference -ToA: Time of Arrival -TP: Transmission Point -TRP: Transmit and Receive Point -UE: User Equipment -SS: Search Space -CSS: Common Search Space -USS: UE Specific Search Space -PDCCH: Physical Downlink Control Channel -PDSCH: Physical Downlink Shared Channel -PUCCH: Physical Uplink Control Channel -PUS CH: Physical Uplink Shared Channel -DCI: Downlink Control Information -UCI: Uplink Control Information -SI: System Information -SIB: System Information Block -MIB: Master Information Block -RRC: Radio Resource Control -DRX: Discontinuous Reception -RNTI: Radio Network Temporary Identifier -CSI: Channel State Information -PCell: Primary Cell -SCell: Secondary Cell -PSCell: Primary SCG (Secondary Cell Group) Cell -CA: Carrier Aggregation -WUS: Wake-up Signal -TX: Transmitter -RX: Receiver -RSTD: Reference Signal Time Difference

[0069] -RS: Reference signal

[0070] -PRS: Positioning Reference Signal

[0071] -SRS: Sounding Reference Signal

[0072] In a wireless communication system, a user equipment (UE) receives information from a base station (BS) through a downlink (DL) and transmits information to the BS through an uplink (UL). The information transmitted and received by the BS and the UE includes data and various control information, and includes various physical channels according to the type / purpose of the information transmitted and received by the UE and the BS.

[0073] Figure 1 Physical channels used in the 3GPP NR system and a general signal transmission method using the same are shown.

[0074] When the UE is powered on again from a power-off state or enters a new cell, in step S101, the UE performs an initial cell search process (e.g., establishes synchronization with the BS). To this end, the UE receives a synchronization signal block (SSB) from the BS. The SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH). The UE establishes synchronization with the BS based on the PSS / SSS and obtains information such as a cell identity (ID). The UE can obtain broadcast information in the cell based on the PBCH. The UE can receive a DL reference signal (RS) during the initial cell search process to monitor the DL channel status.

[0075] After the initial cell search, the UE may acquire more specific system information by receiving a physical downlink control channel (PDCCH) and receiving a physical downlink shared channel (PDSCH) based on information of the PDCCH in step S102.

[0076] The UE may perform a random access procedure to access the BS in steps S103 to S106. For random access, the UE may send a preamble to the BS on a physical random access channel (PRACH) (S103) and receive a response message to the preamble on a PDCCH and a PDSCH corresponding to the PDCCH (S104). In the case of contention-based random access, the UE may perform a contention resolution procedure by further sending a PRACH (S105) and receiving a PDCCH and a PDSCH corresponding to the PDCCH (S106).

[0077] After the foregoing process, the UE may receive PDCCH / PDSCH (S107) and send a physical uplink shared channel (PUSCH) / physical uplink control channel (PUCCH) (S108) as a general downlink / uplink signal transmission process. The control information sent from the UE to the BS is called uplink control information (UCI). UCI includes hybrid automatic repeat and request confirmation / negative determination (HARQ-ACK / NACK), scheduling request (SR), channel state information (CSI), etc. CSI includes channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI), etc. Although UCI is usually sent on PUCCH, UCI may be sent on PUSCH when control information and business data need to be sent simultaneously. In addition, UCI may be sent aperiodically via PUSCH according to the request / command of the network.

[0078] Figure 2 The radio frame structure is shown. In NR, uplink transmission and downlink transmission are configured in frames. Each radio frame has a length of 10ms and is divided into two 5ms half frames (HF). Each half frame is divided into five 1ms subframes (SF). A subframe is divided into one or more time slots, and the number of time slots in a subframe depends on the subcarrier spacing (SCS). Depending on the cyclic prefix (CP), each time slot includes 12 or 14 orthogonal frequency division multiplexing (OFDM) symbols. When a normal CP is used, each time slot includes 14 OFDM symbols. When an extended CP is used, each time slot includes 12 OFDM symbols.

[0079] Table 1 exemplarily shows that the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to the SCS when a normal CP is used.

[0080] [Table 1]

[0081] <![CDATA[SCS(15*2 u )]]> <![CDATA[N slot symb ]]> <![CDATA[N frame,u slot ]]> <![CDATA[N subframe,u slot ]]> 15KHz(u=0) 14 10 1 30KHz(u=1) 14 20 2 60KHz(u=2) 14 40 4 120KHz(u=3) 14 80 8 240KHz(u=4) 14 160 16

[0082] *N slot symb : The number of symbols in a time slot

[0083] *N frame,u slot : Number of time slots in a frame

[0084] *N subframe,u slot : Number of time slots in a subframe

[0085] Table 2 shows that the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to the SCS when the extended CP is used.

[0086] [Table 2]

[0087] <![CDATA[SCS(15*2 u )]]> <![CDATA[N slot symb ]]> <![CDATA[N frame,u slot ]]> <![CDATA[N subframe,u slot ]]> 60KHz(u=2) 12 40 4

[0088] The structure of the frame is only an example. The number of subframes, the number of time slots, and the number of symbols in a frame may vary.

[0089] In the NR system, OFDM parameter sets (e.g., SCS) may be configured differently for multiple cells aggregated for one UE. Therefore, the (absolute time) duration of a time resource (e.g., SF, time slot, or TTI) (referred to as a time unit (TU) for simplicity) consisting of the same number of symbols may be configured differently between aggregated cells. Here, the symbol may include an OFDM symbol (or CP-OFDM symbol) and an SC-FDMA symbol (or a discrete Fourier transform-spread-OFDM (DFT-s-OFDM) symbol).

[0090] Figure 3 A resource grid showing a time slot. A time slot includes multiple symbols in the time domain. For example, when a normal CP is used, a time slot includes 14 symbols. However, when an extended CP is used, a time slot includes 12 symbols. A carrier includes multiple subcarriers in the frequency domain. A resource block (RB) is defined as a plurality of consecutive subcarriers (e.g., 12 consecutive subcarriers) in the frequency domain. A bandwidth part (BWP) may be defined as a plurality of consecutive physical RBs (PRBs) in the frequency domain and corresponds to a single parameter set (e.g., SCS, CP length, etc.). A carrier may include up to N (e.g., five) BWPs. Data communication may be performed via enabled BWPs, and only one BWP may be enabled for a UE. In a resource grid, each element is referred to as a resource element (RE), and a complex symbol may be mapped to each RE.

[0091] Figure 4 An example of mapping physical channels in a time slot is shown. In the NR system, a frame is characterized by a self-contained structure in which a DL control channel, DL or UL data, and a UL channel can all be included in one time slot. For example, the first N symbols of a time slot can be used to carry a DL channel (e.g., PDCCH) (hereinafter referred to as a DL control region), and the last M symbols of a time slot can be used to carry a UL channel (e.g., PUCCH) (hereinafter referred to as a UL control region). Each of N and M is an integer equal to or greater than 0. The resource region (hereinafter referred to as the data region) between the DL control region and the UL control region can be used to send DL data (e.g., PDSCH) or UL data (e.g., PUSCH). The guard period (GP) provides a time gap for switching from a transmit mode to a receive mode or from a receive mode to a transmit mode. Some symbols in a subframe when switching from DL to UL can be configured as GPs.

[0092] PDCCH transmits DCI. For example, PDCCH (i.e., DCI) may carry information about the transmission format and resource allocation of the DL shared channel (DL-SCH), resource allocation information of the uplink shared channel (UL-SCH), paging information about the paging channel (PCH), system information about DL-SCH, information about resource allocation of high-level control messages (e.g., RAR sent on PDSCH), transmit power control commands, information about the activation / release of the configured scheduling, etc. DCI includes a cyclic redundancy check (CRC). The CRC is masked using various identifiers (IDs) (e.g., radio network temporary identifier (RNTI)) according to the owner or purpose of the PDCCH. For example, if the PDCCH is used for a specific UE, the CRC is masked by the UE ID (e.g., cell-RNTI (C-RNTI)). If the PDCCH is used for a paging message, the CRC is masked by the paging-RNTI (P-RNTI). If the PDCCH is for system information (eg, system information block (SIB)), the CRC is masked by a system information RNTI (SI-RNTI). When the PDCCH is for RAR, the CRC is masked by a random access-RNTI (RA-RNTI).

[0093] Figure 5 An exemplary PDSCH reception and ACK / NACK transmission process is shown. Figure 5 , the UE may detect the PDCCH in time slot #n. The PDCCH includes DL scheduling information (e.g., DCI format 1_0 or DCI format 1_1), and indicates the DL assignment to PDSCH offset K0 and PDSCH-HARQ-ACK report offset K1. After receiving the PDSCH in time slot #(n+K0) according to the scheduling information of time slot #n, the UE may send UCI on the PUCCH in time slot #(n+K1). The UCI may include a HARQ-ACK response to the PDSCH. In the case where the PDSCH is configured to carry up to one TB, the HARQ-ACK response may be configured in one bit. In the case where the PDSCH is configured to carry up to two TBs, if spatial bundling is not configured, the HARQ-ACK response may be configured in 2 bits, and if spatial bundling is configured, the HARQ-ACK response may be configured in 1 bit. When slot #(n+K1) is designated as HARQ-ACK transmission timing of a plurality of PDSCHs, UCI transmitted in slot #(n+K1) includes HARQ-ACK responses to the plurality of PDSCHs.

[0094] Figure 6 An exemplary PUSCH transmission process is shown. Figure 6, the UE may detect the PDCCH in slot #n. The PDCCH includes DL scheduling information (e.g., DCI format 1_0 or 1_1). Then, the UE may send the PUSCH in slot #(n+K2) according to the scheduling information in slot #n. The PUSCH includes the UL-SCH TB.

[0095] position

[0096] Positioning may refer to determining the geographic location and / or velocity of a UE based on measurements of radio signals. Location information may be requested and reported by a client (e.g., an application) associated with the UE. Location information may also be requested by a client within or connected to the core network. Location information may be reported in a standard format (e.g., a format based on cells or geographic coordinates) together with an estimated error in the location and velocity of the UE and / or the positioning method used for positioning.

[0097] Figure 7 is a diagram illustrating an exemplary positioning protocol configuration for positioning a UE, to which various embodiments are applicable.

[0098] Reference Figure 7 , LTE Positioning Protocol (LPP) can be used as a point-to-point protocol between a location server (E-SMLC and / or SLP and / or LMF) and a target device (UE and / or SET) for positioning the target device using location-related measurements obtained from one or more reference resources. The target device and the location server can exchange measurement and / or location information based on signal A and / or signal B via LPP.

[0099] NRPPa may be used for information exchange between reference sources (access nodes and / or BSs and / or TPs and / or NG-RAN nodes) and location servers.

[0100] The NRPPa protocol provides the following functions.

[0101] -E-CID position information transmission. This function allows the reference source to exchange position information with the LMF for E-CID positioning.

[0102] -OTDOA information transfer. This function allows the reference source to exchange information with the LMF for OTDOA positioning.

[0103] - Reporting of general error conditions. This feature allows reporting of general error conditions for which no function-specific error messages have been defined.

[0104] Positioning methods supported in NG-RAN may include GNSS, OTDOA, E-CID, air pressure sensor positioning, WLAN positioning, Bluetooth positioning, TBS, uplink time difference of arrival (UTDOA), etc. Although any one positioning method may be used for UE positioning, two or more positioning methods may be used for UE positioning.

[0105] OTDOA (Observed Time Difference of Arrival)

[0106] Figure 8 is a diagram illustrating an observed time difference of arrival (OTDOA) positioning method to which various embodiments are applicable.

[0107] The OTDOA positioning method uses the time measured for DL ​​signals received by the UE from multiple TPs including eNB, ng-eNB, and PRS-only TPs. The UE uses the location assistance data received from the location server to measure the time of the received DL signals. The location of the UE can be determined based on such measurement results and the geographic coordinates of neighboring TPs.

[0108] A UE connected to a gNB may request a measurement gap from a TP to perform OTDOA measurements. If the UE does not know the SFN of at least one TP in the OTDOA assistance data, the UE may use autonomous gaps to obtain the SFN of the OTDOA reference cell before requesting a measurement gap for performing reference signal time difference (RSTD) measurements.

[0109] Here, RSTD may be defined as the minimum relative time difference between two subframe boundaries received from the reference cell and the measurement cell. That is, RSTD may be calculated as the relative time difference between the start time of the subframe received from the measurement cell and the start time of the subframe from the reference cell that is closest to the subframe received from the measurement cell. The reference cell may be selected by the UE.

[0110] For accurate OTDOA measurement, it is necessary to measure the time of arrival (ToA) of signals received from three or more TPs or BSs distributed geographically. For example, the ToA of each of TP 1, TP 2, and TP 3 can be measured, and the RSTD of TP 1 and TP 2, the RSTD of TP 2 and TP 3, and the RSTD of TP 3 and TP 1 are calculated based on the three ToA values. A geometric hyperbola is determined based on the calculated RSTD values, and the intersection of the curves of the hyperbola can be estimated as the position of the UE. In this case, the accuracy and / or uncertainty of each ToA measurement may occur, and according to the measurement uncertainty, the estimated position of the UE can be referred to as a specific range.

[0111] For example, the RSTD of two TPs may be calculated based on the following Equation 1.

[0112] [Formula 1]

[0113]

[0114] In equation 1, c is the speed of light, {x t ,y t} are the (unknown) coordinates of the target UE, {x i ,y i} are the (known) coordinates of the TP, and {x1, y1} are the coordinates of the reference TP (or another TP). i -T1) is the transmission time offset between the two TPs, called the “real time difference” (RTD), n i and n1 is the UE ToA measurement error value.

[0115] E-CID (Enhanced Cell ID)

[0116] In the cell ID (CID) positioning method, the location of the UE can be measured based on the geographic information of the UE's serving ng-eNB, serving gNB and / or serving cell. For example, the geographic information of the serving ng-eNB, serving gNB and / or serving cell can be obtained through paging, registration, etc.

[0117] In addition to the CID positioning method, the E-CID positioning method may also use additional UE measurements and / or NG-RAN radio resources to improve the UE position estimate. Although the E-CID positioning method may partially utilize the same measurement method as the measurement control system on the RRC protocol, additional measurements only for UE position measurement are generally not performed. In other words, additional measurement configurations or measurement control messages may not be provided for UE position measurement. The UE is not expected to request additional measurement operations only for position measurement, and the UE may report measurement values ​​obtained by a generally measurable method.

[0118] For example, the serving gNB may use the E-UTRA measurements provided by the UE to implement the E-CID positioning method.

[0119] For example, the measurement elements that can be used for E-CID positioning may be as follows.

[0120] -UE measurements: E-UTRA Reference Signal Received Power (RSRP), E-UTRA Reference Signal Received Quality (RSRQ), UE E-UTRA Receive (Rx)-Transmit (Tx) Time Difference, GERAN / WLAN Reference Signal Strength Indicator (RSSI), UTRAN Common Pilot Channel (CPICH) Received Signal Code Power (RSCP) and / or UTRAN CPICH Ec / Io

[0121] -E-UTRAN measurements: ng-eNB Rx-Tx time difference, timing advance (T ADV) and / or AoA

[0122] Here, T ADV It can be divided into type 1 and type 2 as follows.

[0123] T ADV Type 1 = (ng-eNB Rx-Tx time difference) + (UE E-UTRA Rx-Tx time difference)

[0124] T ADV Type 2 = ng-eNB Rx-Tx time difference

[0125] AoA can be used to measure the direction of the UE. AoA is defined as the estimated counterclockwise angle of the UE relative to the eNB / TP. In this case, the geographic reference direction may be north. The eNB / TP may use UL signals such as SRS and / or DMRS to perform AoA measurements. The measurement accuracy of AoA increases as the arrangement of the antenna array increases. When the antenna array is arranged at the same interval, the signals received at adjacent antenna elements may have a constant phase rotation.

[0126] UTDOA (Uplink Time Difference of Arrival)

[0127] UTDOA is a method of determining the location of a UE by estimating the arrival time of an SRS. When calculating the estimated SRS arrival time, the serving cell can be used as a reference cell to estimate the location of the UE by the arrival time difference with another cell (or base station / TP). To implement UTDOA, the E-SMLC may indicate the serving cell of the target UE in order to instruct the target UE to send an SRS. In addition, the E-SMLC may provide configurations such as periodic / aperiodic SRS, bandwidth, and frequency / group / sequence hopping.

[0128] Multiple RTT (Round Trip Time)

[0129] Fig. 9 is a diagram illustrating an exemplary multiple round trip time (multi-RTT) positioning method to which various embodiments are applicable.

[0130] Reference Fig. 9 (a) shows an exemplary RTT process, in which the initiating device and the responding device perform ToA measurement, and the responding device provides the ToA measurement to the initiating device for RTT measurement (calculation). The initiating device can be a TRP and / or a UE, and the responding device can be a UE and / or a TRP.

[0131] The initiating device may send an RTT measurement request, and the responding device may receive the RTT measurement request (1301).

[0132] The initiating device may send an RTT measurement signal at t0, and the responding device may obtain a ToA measurement at t1 (1303).

[0133] The responding device may send an RTT measurement signal at t2, and the initiating device may obtain a ToA measurement at t3 (1305).

[0134] The responding device may send information about [t2-t1], and the initiating device may receive the information and calculate the RTT through Equation 2 (1307). The information (1305) may be sent and received based on a separate signal or in an RTT measurement signal.

[0135] [Formula 2]

[0136] RTT = t3-t0-[t2-t1]

[0137] Reference Fig. 9 (b), RTT may correspond to double ranging between two devices. Positioning estimation may be performed from the corresponding information, and multi-point positioning may be used for positioning estimation. d1, d2, and d3 may be determined based on the measured RTT, and the location of the target device may be determined as the intersection of the circumferences of circles with radii d1, d2, and d3 centered at BS1, BS2, and BS3 (or TRP), respectively.

[0138] NG-RAN positioning architecture and process

[0139] Fig.10 The positioning structure of the next generation (NG) radio access network (RAN) is shown. The NG RAN may be referred to as NR RAN or 5G RAN.

[0140] The AMF may receive a request for location services related to a specific target UE from other entities (e.g., a Gateway Mobile Location Center (GMLC) or a UE), or the AMF itself may determine to initiate location services on behalf of a specific target UE (e.g., in the case of an IP Multimedia Subsystem (IMS) emergency call). The AMF may then forward the location service request to the LMF. The LMF may process the location service request, wherein processing the location service request may include sending assistance data to the target UE for UE-based and / or UE-assisted positioning and / or positioning of the target UE. The LMF sends the location service result (e.g., a position estimate of the UE) to the AMF. In the event that an entity other than the AMF (e.g., a GMLC or a UE) requests location services, the AMF forwards the location service result to the corresponding entity.

[0141] The NG-RAN node may control TRP / TP (e.g., RRM or DL-PRS only TP) to support a PRS-based Terrestrial Beacon System (TBS).

[0142] The LMF may connect to an Enhanced Serving Mobile Location Centre (E-SMLC) to access Universal Terrestrial Radio Access Network (UTRAN) information.

[0143] The LMF may be connected to a Secure User Plane Location (SUPL) Location Platform (SLP) responsible for positioning in the user plane.

[0144] Fig.11 Shows examples of location services supported by NG-RAN.

[0145] When the UE is in the Connection Management Idle (CM-IDLE) state, if the AMF receives a Location Service Request, the AMF performs a Network Triggered Service Request to configure the signaling for connecting to the UE and allocating a specific serving gNB / ng-eNB. Fig.11 In the example, it is assumed that the UE is in connected mode.

[0146] A location service request for the UE may be triggered, and the request may be one of steps 1101, 1102, or 1103. For example, an entity in the 5GC (e.g., GMLC) may request a location service (e.g., positioning) of the target UE from the serving AMF (1101). Alternatively, the serving AMF may trigger a location service of the target UE itself (e.g., looking for the UE to make an emergency call) (1102). In addition, the UE may request a location service (e.g., positioning or assistance data transmission) from the serving AMF at the NAS level (1103).

[0147] The AMF forwards the location service request to the LMF (1104).

[0148] The LMF provides services in the NG-RAN to obtain location measurements or assistance data and initiates a positioning process with neighboring ng-eNB / gNB (1105).

[0149] (Instead of step 1105 or in addition to step 1105) the LMF initiates a positioning procedure with the UE to obtain a position estimate or positioning measurement or send position assistance data to the UE (1106).

[0150] The LMF provides a location service response (1107) to the AMF (e.g., success or failure, and if requested and obtained, the UE's location estimate).

[0151] (In step 1101) the AMF provides a location service response (1108) (e.g., a location estimate of the UE) to the 5GC entity.

[0152] The AMF (in step 1102) supports the service triggered in step 1102 (1109) based on the location service response received in step 1107 (eg, providing the GMLC with a location estimate related to an emergency call).

[0153] (In step 1103) the AMF provides a location service response (1110) (eg, a location estimate of the UE) to the UE.

[0154] Carrier Phase Measurement (CPM) Assist

[0155] In NR, various techniques can be used to perform positioning. As described above, timing-based methods (e.g., DL-TDOA (downlink time difference of arrival), UL-RTOA (uplink round-trip time of arrival), multi-RTT), angle-based methods (e.g., AoA, AoD), and cell ID-based methods (e.g., E-CID) can be used.

[0156] In addition, Rel-18 discusses support for positioning methods based on carrier phase measurement (ie, NR carrier phase measurement). In CPM-based positioning, in order to measure the propagation delay of the RS caused by the distance between the BS and the UE, a method of performing and utilizing phase measurement based on the carrier frequency of the received signal is being discussed.

[0157] In CPM-based positioning, positioning is performed based on phase changes in the phase domain, which improves positioning accuracy. On the other hand, unlike other time-domain positioning techniques, positioning accuracy may be significantly affected by phase changes, so it is necessary to consider the impact of phase errors. The phase value at the kth subcarrier measured for the RS at the receiver can be expressed as shown in Equation 3.

[0158] [Formula 3]

[0159] Φ k =Φ tx -Φ rx -2π(f c +kΔf)*τ0+η k

[0160] In formula 3, Φ k refers to the phase value measured at the kth subcarrier, f c and Δf represent the carrier frequency and subcarrier spacing used to transmit RS, respectively. In addition, τ0 represents the propagation delay, i.e., the time taken at the receiver to receive the RS transmitted from the transmitter, η k It represents the noise value caused by additive white Gaussian noise (AWGN) and multipath effect at the receiver.

[0161] In this case, Φ tx and Φ rxDenote the initial phase error values ​​occurring at the transmitter and receiver, respectively. The initial phase error is a common phase error value occurring across the entire bandwidth of the received RS. The initial phase error is caused by the physical characteristics of the components and devices in the transmitter and receiver, which makes prediction and modeling difficult.

[0162] The effects of these initial phase errors will affect the performance of CPM-based positioning and therefore need to be removed. To this end, differential techniques can be used in CPM-based positioning systems. Differential techniques use the difference between two or more phase measurements with the same error to remove the common error value. To do this, two or more measurements need to be measured simultaneously.

[0163] For example, in the case of an initial phase error occurring at the receiver, the initial phase error can be removed using the difference between two measurements simultaneously measured by the same receiver. In the case of an initial phase error occurring at the transmitter, the initial phase error can be removed using the difference between measurements measured at two different receivers for RSs sent from the same transmitter.

[0164] In this case, in order to remove the initial phase error at the transmitter, accurate or known location information about at least one UE / device is required. To this end, the use of a Positioning Reference Unit (PRU) is considered.

[0165] A PRU is a device / node with a known location that performs positioning measurements (e.g., RSTD, RSRP, UE Rx-Tx time difference measurements, etc.) and can report the measurements to a location server. In addition, the PRU sends an SRS to allow the TRP to measure the SRS from a PRU with a known location and report UL measurements (e.g., RTOA, UL-AoA, gNB Rx-Tx time difference, etc.). The PRU's measurements can be compared with the location server's prediction of the PRU's measurements for a known location. This comparison can be used to obtain information for calibrating the location measurements of nearby target devices. The information obtained for location measurement calibration can be used to correct the DL / UL location measurements of other target devices.

[0166] From the perspective of the location server, a UE with a known location can be used as a PRU.

[0167] When PRU is used for NR CPM positioning, as described above, the UE and PRU need to measure the phase value of the RS sent simultaneously from the same transmitter for the same TRP (or PRS resource). If the UE and PRU autonomously select the RS and time point to be measured, similar to the existing positioning technology, it may not be conducive to ensuring CPM positioning performance because it is difficult to eliminate the same initial phase error. For this reason, an agreed operation between the UE and PRU may be required.

[0168] On the other hand, from the perspective of the network, as positioning objects, the target UE and PRU have various different characteristics.

[0169] -Generally, a high-level node estimates in advance the channel environment of the target UE subject to positioning, and the method of determining / indicating the time point and target (resource) of the RS to be received may not be suitable. Therefore, the current 3GPP NR positioning technology provides a PRS list that the UE can receive, and the UE selects an appropriate PRS from the PRS list according to its reception conditions and measures and reports the PRS. Considering the positioning characteristics of the UE, even in future scenarios that support CPM-based positioning technology, there may be RS (configuration) selection of the UE.

[0170] - Compared to UE, since PRU is usually assumed to have a (fixed) known location, the change of PRU measurement performance may be less sensitive to time-varying channel characteristics. Therefore, in most cases, the higher-layer node can identify / select the appropriate time point and / or RS (configuration) for PRU measurement, which is different from UE.

[0171] - Although the measurement report of a UE is mainly for its accurate positioning, the PRU as a UE with special capabilities / purposes needs to be considered, because the PRU measurement / reporting is mainly aimed at improving the positioning accuracy of other UEs (in addition to the positioning of the PRU).

[0172] - Additionally, efficient design of PRU operation considering both implementation complexity and power efficiency may be required.

[0173] In view of the above characteristics / problems / requirements, the present disclosure proposes a PRU operation and related network signaling method related to CPM-based positioning.

[0174] In the present disclosure, the proposed method is mainly described according to the CPM-based positioning technology using the 3GPP NR system as a reference, but the present disclosure is not limited thereto. The proposed method can also be applied to other positioning technologies that can estimate the distance or direction between the transmitter and the UE to determine the positioning. Therefore, the proposed method can be applied to all types of transmission and reception methods and positioning technologies expected by the BS and the UE. In addition, the proposed method is not limited to the use of PRU. Since the phase can be measured by measuring the RS, these methods can be applied to devices that can use location information. In addition, the role of the PRU can be replaced by a device such as a BS or a UE.

[0175] For convenience, it is assumed that the transmitter is a BS and the receiver is a UE. Considering the structure in which the BS transmits a PRS and the UE receives a PRS, the proposed method will be described under the assumption that the UE performs an operation of measuring a phase based on the received PRS and reports the result of the calculated phase measurement to a higher-level node (e.g., LMF or BS). However, the proposed method may also be applied when the transmitter is a UE and the receiver is a BS or when both the transmitter and the receiver are UEs (or BSs). These methods may also be applied when the RS used for transmission and phase measurement is an SRS or an SL PRS.

[0176] The proposed methods may be implemented as a combination of one or more methods, or independently implemented without combination.Some terms, symbols or sequences used may be replaced with other terms, symbols or sequences as long as the principles of the present disclosure are maintained.

[0177] In order to support CPM-based positioning, the present disclosure proposes a method in which a network node (e.g., a high-level node such as a BS / TRP or LMF) configures / indicates the function of a PRU to another node (e.g., a device with a known location, such as a UE / TRP with a PRU function), and the other node performs the configured / indicated PRU function / operation. In addition, the present disclosure proposes a method in which the other node playing the role of a PRU or having its capabilities generates and reports information in order to support CPM-based positioning. For convenience, the network node is referred to as a high-level node, and the other node is assumed to be a PRU UE, but the present disclosure is not limited to this.

[0178] [Proposal 1] Measurement-related configuration information and operations for PRUs supporting CPM-based positioning

[0179] A method is proposed in which a PRU receives information related to CPM-based positioning support from a higher-level node (e.g., a BS or LMF) and receives a PRS based on the information. The information related to CPM-based positioning support may be provided through a SIB (e.g., positioning-related SIB) or RRC (e.g., UE-specific RRC signaling) sent by the BS, or the information may be sent through an LPP provided by the LMF.

[0180] Information and configuration methods related to CPM-based positioning support

[0181] Information related to the reception of the target PRS measured by the PRU may be included as a piece of information related to CPM-based positioning support. In this case, the PRS reception related information may include information specifying the measurement target PRS. The target PRS may be specified based on the 3GPP NR standard in units such as positioning frequency layer, TRP, PRS resource set and / or PRS resource. For example, the PRU UE may receive configuration information about all PRSs expected to be received based on the configuration information received from the high-level node. In this case, the configuration information about all PRSs may be the same as that of a general UE that does not perform the PRU function. In addition to the configuration information of all PRSs, the PRU UE may receive configuration information about a PRS list for supporting CPM-based positioning. The PRS list may be represented using the ID of the positioning frequency layer, TRP, PRS resource set and / or PRS resource.

[0182] Information about the measurement time point of the PRU may be included as a piece of information related to CPM-based positioning support. In this case, the information about the measurement time point of the PRU may be provided in the form of a measurement gap (MG) or a preprocessing window (PRW), or the information may be in the form of a separately configured duration. At least one piece of configuration information about the measurement time point may be configured. For example, the PRU UE may be configured with multiple MGs and / or PPWs. When the PRU UE is configured with information about multiple measurement time points, the PRU UE may perform PRS measurement for all durations, or the PRU UE may perform measurement as a PRU at a position of a selected / configured duration.

[0183] The two types of information related to CPM-based positioning support proposed above can be configured separately or designed to have an associated configuration relationship. For example, when a duration such as MG or PPW is configured for CPM-based positioning, information about the measurement target PRS can be provided together with the configured duration.

[0184] The information provided to the PRU related to CPM-based positioning support specifies the measurement time point and target TRP (or PRS) of the PRU, thereby providing a useful structure for performing differentials in the measurement of the target UE based on CPM positioning. If the configuration information is not provided separately, the PRU may perform measurements based on arbitrarily selected reception time points and TRP (or PRS), similar to the positioning method of a general UE. In this case, the reception time point and TRP (or PRS) selected by the UE may not match the reception time point and TRP (or PRS) selected by the UE requiring differential support, which may be detrimental to improving the positioning accuracy based on phase error elimination.

[0185] PRS reception by a PRU UE when receiving information related to CPM-based positioning support

[0186] When the UE is instructed to perform the PRU operation, after receiving the information related to the CPM-based positioning support, the UE may receive the PRS based on the information and report the result.

[0187] As a specific operation method of the UE instructed to perform the PRU operation, the UE may perform PRS measurement and report the results for all durations configured and indicated by the information related to the CPM-based positioning support. This means that the UE is not allowed to arbitrarily skip the measurement or reporting of some configured durations. For example, for the measurement time point specified for CPM purposes in the form of MG (or PPW), the UE may measure PRS at all positions of the periodically repeated MG (or PPW) and then report the results. The measurement report may be performed based on at least one of the following options.

[0188] Option A-1) The PRU UE may provide a separate measurement report for each MG (or PPW) measured by the PRU UE. In this case, the report may be sent on the PUSCH scheduled via the PDCCH in a periodically monitored search space, or may be sent on a periodically transmitted PUSCH resource. The time domain resources of the periodic search space or PUSCH may have the same periodicity as the MG (or PPW), which may also be specified by the offset size calculated from the position where each MG (or PPW) ends (or starts).

[0189] Option A-2) The PRU UE may report measurements of multiple MGs (or PPWs) on a single UL resource. In this case, the report may be sent on a PUSCH scheduled via a PDCCH in a periodically monitored search space, or the report may be sent on a periodically transmitted PUSCH resource. The time domain resources of the periodic search space or PUSCH may be set to a multiple of the periodicity of the MG (or PPW), and the measurement results sent in a bundled form may be specified by an offset size calculated from the position where the last measured MG (or PPW) ends (or starts). In this case, in order to distinguish between different measurement reports sent on the same PUSCH, each measurement report may include information about the MG performing the measurement. For example, the information about the MG may be the time domain order of the MGs corresponding to the bundled measurement report, or information about the index of the time slots (or frames) included in each MG (e.g., time slot index and / or SFN) may be included in each measurement report value.

[0190] As a specific operation method of the UE instructed to perform the PRU operation, the UE may perform measurement and report the results for all PRS resources configured and indicated by the information related to CPM-based positioning support (e.g., PRS sets configured / indicated in units such as positioning frequency layers, TRPs, PRS resource sets, and / or PRS resources). This means that the UE is not allowed to arbitrarily skip measurement or reporting of some configured PRS resources. For example, for a PRS for CPM purposes configured / indicated in units of TRPs (or PRS resources (sets)), the UE may perform measurement at the locations of all periodically repeated MGs (or PPWs) and report the results.

[0191] As described above, it is generally assumed that the PRU UE has a fixed position. Therefore, it can be assumed that the channel environment of the PRU (especially the large-scale fading channel) will not change significantly over time. However, it is necessary to consider the possibility of changes in the channel environment of the PRU in special cases. For example, the specific TRP (or PRS resource) that the PRU is configured / indicated to measure may fail due to internal / external factors. In the case of general UE and positioning technology, there is no need to provide a separate report for the TRP (or PRS resource) that failed to measure. However, in the case of a PRU UE that forces measurement and reporting of a specified TRP (or PRS resource), it may be inappropriate for the UE to skip the report based on its judgment. Taking these situations into account, if the measurement of a specific specified TRP (or PRS resource) fails, the UE may provide information indicating the measurement failure to the higher-level node. For example, the UE may send failure indication information instead of reporting the measurement value of the TRP (or PRS resource) that failed to measure. Alternatively, in the measurement report field representing the phase value (or other positioning-related measurement), a specific value may be configured to provide information about measurement failure and / or failure factors instead of representing the actual value. In another example, the UE may be configured to skip the measurement of a specific TRP (or PRS resource) only when the measurement of the TRP (or PRS resource) fails. In this case, the high-level node may interpret the measurement report lacking a specific TRP (or PRS resource) as information indicating that the measurement of the TRP (or PRS resource) failed.

[0192] The operation of the PRU UE based on the information provided to the PRU for CPM-based positioning support may specify the time point and PRU at which the PRU UE performs measurements, thereby enabling the UE that intends to obtain precise positioning information through CPM-based positioning to obtain the benefits of phase error elimination through differential. If the operation of the PRU UE is not specified, similar to the positioning method of a general UE, the PRU may perform measurements based on an arbitrarily selected reception time point and TRP (or PRS). In this case, the reception time point and TRP (or PRS) selected by the UE may not match the reception time point and TRP (or PRS) selected by the UE that requires differential support, which may be detrimental to improving positioning accuracy based on phase error elimination.

[0193] [Proposal 2] PRU measurement report based on CPM positioning support

[0194] The present disclosure proposes a method in which a PRU receives information related to CPM-based positioning support from a higher-level node (e.g., a BS or LMF), performs a PRS reception operation based on the information, and then reports the result. Specifically, the proposed method may include a proposal for configuration information about measurement reports. The measurement report may be sent via RRC or LPP information generated by the UE and sent to a higher-level node (e.g., a BS or LMF).

[0195] CPM (Carrier Phase Measurement)

[0196] In order to support CPM-based positioning, the information measured / reported by the UE may include a CPM value obtained by the UE through a specific PRS. In this case, the CPM value may be determined based on the phase value caused by the propagation delay between the transmitter and the receiver based on the carrier frequency at which the PRS is transmitted, as measured by the UE. The form in which CPM is expressed in the measurement report may be an arrival phase (POA) or an arrival phase difference (PDOA). POA refers to the phase caused by the propagation delay between the transmitter and the receiver, which can be expressed as a value between 0 and 2π. The phase rotation part caused by the propagation delay exceeding 2π (i.e., the propagation delay part expressed as an integer multiple of the carrier wavelength) is not included. For example, the value of the pure carrier phase caused by the propagation delay can be expressed by Equation 4. In Equation 4, f c represents the carrier frequency, τ0 represents the propagation delay between the transmitter and the receiver, and mod(x,y) means performing a modulo operation of x with respect to y.

[0197] [Formula 4]

[0198] φ=mod(2πf c *τ0,2π)

[0199] PDOA refers to the difference between the CPM measured from the PRS received from the reference TRP and the CPM measured from the PRS received from another TRP. The result of PDOA considering pure carrier phase without considering the effect of error can be expressed as Equation 5. In Equation 5, f c represents the carrier frequency, τ r and τ t denote the propagation delay between the transmitter and the receiver relative to the reference TRP and the target TRP, respectively, and mod(x,y) means performing a modulo operation of x with respect to y.

[0200] [Formula 5]

[0201] φ D =φ t -φ r =mod(2πf c *τ r ,2π)-mod(2πf c *τ t ,2π)

[0202] Even without a specific request, a UE configured / instructed to perform PRU functionality may always include POA or PDOA values ​​in measurement reports. This may be to support higher layer nodes in receiving the impact of propagation delay observed in the phase domain to support accurate positioning performance in CPM-based positioning.

[0203] Additional measurement of integer ambiguity resolution

[0204] When performing CPM-based positioning, one of the main issues that needs to be resolved to ensure positioning performance is integer ambiguity. This integer ambiguity originates from the distance ambiguity caused by the unobserved propagation delay in the phase domain. That is, the phase value has a range of 0 to 2π, and the actual distance that can be distinguished by this range is limited by the wavelength determined by the carrier frequency, which causes problems. Considering the commonly used solutions, additional information other than CPM may be required to resolve the integer ambiguity. Taking into account the characteristics derived from CPM-based positioning, the proposed method may include the target of additional information reported by the PRU UE in addition to CPM, and a method of applying the information.

[0205] When the PRU UE performs measurement / reporting to support CPM-based positioning, the additional information included in the measurement report may include the propagation delay between the BS and the UE. For example, the information about the propagation delay may include timing-based positioning measurements, such as ToA and time difference of arrival (TDOA) already used in 3GPP NR. Alternatively, the information may include information about the propagation delay estimated based on the phase difference between the subcarriers receiving the PRS, such as subcarrier phase measurement (ScPM). Alternatively, the additional information included in the measurement report may include information in the angle domain of the BS sending the PRS (e.g., the angle of departure (AoD)) or information in the angle domain of the PRS received by the PRU UE (e.g., the angle of arrival (AoA)). This information can be used to calculate information about the coarse position of the PRU UE (i.e., information at a level relatively lower than the positioning resolution that can be expected from CPM-based positioning), which may be useful for high-level nodes to resolve integer ambiguity problems.

[0206] The additional information included in the measurement report proposed above may be configured so that the PRU UE reports the information only when a specific condition is met. Otherwise, the UE may not report the information (or the UE may be allowed to determine whether to report the information). The specific condition may be determined according to one or more of the following options.

[0207] Option B-1) When the higher-level node indicates / requests one or more of the above-mentioned additional information, the PRU UE may perform the indicated / requested measurements and report the results. This allows the higher-level node to request information from the UE when necessary to improve positioning accuracy, and when not necessary, ensures that the PRU UE does not need to report additional information, thereby reducing unnecessary overhead.

[0208] Option B-2) The reporting of additional information may be determined based on the UE's selection. This allows the UE to immediately react to the situation and provide additional information when the UE detects a specific condition (e.g., its position changes or measurement performance degradation), thereby reducing the response time of higher-level nodes to resolve positioning errors.

[0209] The proposed method reduces the transmission of information with low utility compared to transmission and allows transmission only when necessary, thereby reducing the overhead of measurement reports sent by the UE. The proposed method may be particularly useful when the position of the PRU UE is generally assumed to be fixed, so the change of integer ambiguity does not exist or is minimal. In addition, when specific situations arise, such as when the position of the PRU is estimated for the first time or when the information about the PRU position changes, the proposed method can solve the problem by adaptively allowing additional measurement reports.

[0210] [Proposal 3] PRUUE supports CPM-based positioning capabilities and auxiliary information data

[0211] In the following, the capabilities required by PRU UE to support CPM-based positioning are defined. In addition, a method for applying these capabilities is proposed.

[0212] Capability based on UE's ability to handle TRP (or PRS resources)

[0213] The capability of a PRU UE may include the number of TRPs (or PRS resources) that the UE can measure simultaneously. The measurement information provided by a single PRU may be used to improve the CPM-based positioning performance of multiple UEs. Considering that the TRP (or PRS resource) that is beneficial to the UE may vary, the more TRPs (or PRS resources) measured by the PRU, the more beneficial it may be to ensure stable CPM-based positioning performance. However, as the number of RSs that the UE can receive and process simultaneously increases, the implementation complexity and power consumption of the UE may increase, which leads to potential constraints. Therefore, the PRU UE may be defined as having the maximum number of TRPs (or PRS resources) that can be received and measured simultaneously within the reference time based on a single reference time. The capability of the number of TRPs (or PRS resources) may be divided into multiple levels, and the UE may report the capability to a higher-level node (e.g., BS or LMF). Based on the reported capability, the higher-level node may configure and provide configuration information to the UE to support CPM-based positioning. In this case, the UE may expect that based on the capability reported by the UE, the UE will not need to process more TRPs (or PRS resources) than the reported capability within a single reference time. Alternatively, if more TRPs (or PRS resources) are configured than the reported capability, the UE may perform measurements and reports on TRPs (or PRS resources) that are less than or equal to the reported capability.

[0214] Auxiliary information data sent by UE

[0215] In order to support CPM-based positioning, the present disclosure proposes information that can be used as auxiliary information data provided by the PRU UE to the upper node. Auxiliary information data is a type of data sent by the UE to the upper node, and refers to reference information provided by the UE in order to receive preferred configuration and indication information from the upper node. Upon receiving this information, the upper node can (re)configure (or change) and indicate appropriate configuration and indication information based on the received information, but this is not mandatory and can be determined based on the selection of the upper node. The method proposed in the present disclosure is explained based on the operating method for auxiliary information data. However, those skilled in the art will understand that as long as the idea of ​​the present disclosure is maintained, these methods may also be applied when the UE provides information in a manner different from the above-mentioned operating method (for example, an explicit request or report related to capabilities).

[0216] The auxiliary information data sent by the PRU UE to the high-level node may include a preferred value for the maximum number of TRPs (or PRS resources) that the PRU UE expects to simultaneously receive and measure within a single reference time. Taking into account constraints such as the implementation complexity and power consumption of the PRU UE, the above operation may be to request the maximum number of TRPs (or PRS resources) that the UE can handle simultaneously and to configure the information based on the request. The distinguishing feature from the proposed capability is that the transmission of information about the preferred value of the maximum number of TRPs (or PRS resources) through the auxiliary information data allows adaptive changes and requests according to the situation (for example, UE battery capacity), thereby providing the benefit of flexibility.

[0217] The assistance information data sent by the PRU UE to the higher layer node may include preferred information about the periodic duration configured for the PRU UE to perform measurements (e.g., MG, PPW, or similar duration concepts that can be used for CPM purposes). Specifically, the preferred information about the periodic duration may include the periodicity of the duration occurrence and / or the length of the duration that each duration is maintained. In addition, the preferred information about the periodic duration may include information about the preferred duration from a set of pre-configured multiple durations. This is advantageous because the preferred information allows the PRU UE to be configured with an appropriate duration based on its situation (e.g., battery status).

[0218] The auxiliary information data sent by the PRU UE to the higher-level node may include information about adding or removing TRPs (or PRS resources) from the measurement targets of the PRU UE. This is applicable to the case where a list of measurement target TRPs (or PRS resources) has been configured / provided to the PRU UE. Specifically, if the UE successfully discovers a new TRP (or PRS resource) that ensures good reception performance, or if there is a TRP (or PRS resource) whose measurement performance is significantly degraded, the performance of CPM-based positioning can be improved by adding or removing TRPs (or PRS resources) from the list.

[0219] Fig.12 FIG. 1 is a diagram for explaining operations of a UE and a network according to an embodiment. Fig.12 In the present invention, the network may include multiple network nodes (eg, BS / TRP and LMF server). For convenience of explanation, the term "LMF" used herein may be replaced by other terms. Fig.12 As an implementation example of the above-mentioned proposal, please refer to the details previously explained to help understand Fig.12 .

[0220] Reference Fig.12, a UE supporting PRU (hereinafter referred to as PRU UE) sends a UE capability report to the network, wherein the UE capability report informs the PRU that the UE is capable of operating as a PRU providing a reference position for positioning (1205).

[0221] The network may send PRU related configuration information to the PRU UE (1211). The PRU related configuration information may include configuration information about measurements to be performed by the PRU UE as a PRU. The location of the PRU UE may be known to the network.

[0222] In addition, the network may transmit configuration information on measurements to be performed by the positioning target UE (1210).

[0223] Configuration information about measurements to be performed by the target UE and configuration information about measurements to be performed by the PRU UE as a PRU may share at least some of the CPM measurement duration and / or the CPM measurement target RS resource set.

[0224] The network may send a positioning related RS (eg, PRS) (1215).

[0225] The PRU UE may perform measurement of positioning-related RS as a PRU (1220). The measurement of the PRU may include CPM for target UE positioning. The measurement of the PRU may include different types of measurements from CPM. The different types of measurements may be related to at least one of ToA, TDOA, ScPM, AoD, or AoA.

[0226] The PRU UE may report the measurement of the PRU to the network (1230). The PRU UE performs measurement reporting for all RS resources included in the configuration information (1211). In this case, the measurement report of all RS resources may include information about the RS resources where the measurement failure occurred. The information about the RS resources where the measurement failure occurred may include at least one of a measurement failure indication and a measurement failure cause. The measurement report of all RS resources may include phase measurement values ​​of the remaining RS resources except the RS resources where the measurement failure occurred. Each phase measurement value may be expressed as mod(2πfcτ0,2π), where fc represents the carrier frequency, τ0 represents the propagation delay of the RS, and mod represents a modulo operation.

[0227] The target UE may perform measurement of positioning-related RS as a target UE (1225). The target UE may send a measurement report to the network (1235). The target UE performs measurement reporting of at least some RS resources included in the configuration information (1210). In this case, measurement reporting of RS resources where measurement failure occurs may be omitted.

[0228] The PRU's measurements may be used to correct errors in the target UE's measurements.

[0229] Fig.13 is a diagram for explaining the operation of the first device according to the embodiment.

[0230] Reference Fig.13 , the first device sends device capability information (A05) to the network, notifying that the first device can operate as a PRU that provides a reference position for positioning.

[0231] The first device may receive configuration information about measurement to be performed by the first device as a PRU (A10).

[0232] The first device may report the measurement of the PRU performed based on the configuration information to the network (A15). Based on the first device operating as a PRU, measurement reporting may be performed for all RS resources included in the configuration information. The measurement report of all RS resources may include information about the RS resources where measurement failure occurs.

[0233] The information about the RS resource where the measurement failure occurs may include at least one of a measurement failure indication and a measurement failure cause.

[0234] The measurement report of all RS resources may include phase measurement values ​​of the remaining RS resources except the RS resource where the measurement failed. Each phase measurement value may be expressed as mod(2πfcτ0,2π), where fc represents the carrier frequency, τ0 represents the propagation delay of the RS, and mod represents the modulo operation.

[0235] The configuration information may include information on the measurement duration of the PRU and information on a resource set of all RS resources.

[0236] The measurements of the PRU may include CPM for target UE positioning.

[0237] The location of the PRU may be known to the network, and the CPM of the PRU may be related to the correction of the CPM error of the target UE.

[0238] The measurements of the PRU may also include different types of measurements than CPM. The different types of measurements may be related to at least one of ToA, TDOA, ScPM, AoD, or AoA.

[0239] The RS resource may be a DL PRS resource.

[0240] The first device may be a UE.

[0241] Fig.14 2 is a diagram for explaining the operation of the second device according to the embodiment.

[0242] Reference Fig.14, the second device receives device capability information from the first device informing that the first device can operate as a PRU that provides a reference position for positioning (B05).

[0243] The second device transmits configuration information about measurement to be performed by the first device as a PRU (B10).

[0244] The second device may receive a measurement report of the PRU performed based on the configuration information from the first device (B15). The measurement report of the PRU may include measurement results of all RS resources included in the configuration information. The measurement results of all RS resources may include information about RS resources where measurement failure occurs.

[0245] The information about the RS resource where the measurement failure occurs may include at least one of a measurement failure indication and a measurement failure cause.

[0246] The measurement results of all RS resources may include phase measurement values ​​of the remaining RS resources except the RS resource where the measurement failed. Each phase measurement value may be expressed as mod(2πfcτ0,2π), where fc represents the carrier frequency, τ0 represents the propagation delay of the RS, and mod represents the modulo operation.

[0247] The configuration information may include information on the measurement duration of the PRU and information on a resource set of all RS resources.

[0248] The measurements of the PRU may include CPM for target UE positioning.

[0249] For the second device, the location of the PRU may be known, and the CPM of the PRU may be related to the correction of the CPM error of the target UE.

[0250] The measurements of the PRU may also include different types of measurements than CPM. The different types of measurements may be related to at least one of ToA, TDOA, ScPM, AoD, or AoA.

[0251] The RS resource may be a DLPRS resource.

[0252] The second device may include at least one network node (eg, BS / TRP and / or LMF) in a wireless communication system.

[0253] Fig.15 A communication system 1 applied to the present disclosure is shown.

[0254] Reference Fig.15, the communication system 1 applied to the present disclosure includes a wireless device, a base station (BS), and a network. Herein, a wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G new RAT (NR) or long term evolution (LTE)), and may be referred to as a communication / radio / 5G device. The wireless device may include, but is not limited to, a robot 100a, vehicles 100b-1 and 100b-2, an extended reality (XR) device 100c, a handheld device 100d, a home appliance 100e, an Internet of Things (IoT) device 100f, and an artificial intelligence (AI) device / server 400. For example, a vehicle may include a vehicle with a wireless communication function, an autonomous driving vehicle, and a vehicle capable of performing communication between vehicles. Herein, a vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices, and may be implemented in the form of a head mounted device (HMD), a head up display (HUD) installed in a vehicle, a television, a smart phone, a computer, a wearable device, a home appliance device, a digital sign, a vehicle, a robot, etc. Handheld devices may include smart phones, smart boards, wearable devices (e.g., smart watches or smart glasses), and computers (e.g., notebooks). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors and smart meters. For example, a BS and a network may be implemented as wireless devices, and a specific wireless device 200a may operate as a BS / network node relative to other wireless devices.

[0255] The wireless devices 100a to 100f may be connected to the network 300 via the BS 200. The AI ​​technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI ​​server 400 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although the wireless devices 100a to 100f may communicate with each other via the BS 200 / network 300, the wireless devices 100a to 100f may perform direct communication (e.g., side link communication) with each other without passing through the BS / network. For example, vehicles 100b-1 and 100b-2 may perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). An IoT device (e.g., a sensor) may perform direct communication with other IoT devices (e.g., a sensor) or other wireless devices 100a to 100f.

[0256] Wireless communication / connection 150a, 150b or 150c may be established between wireless devices 100a to 100f / BS200 or BS200 / BS200. Herein, wireless communication / connection may be established through various RATs (e.g., 5G NR) such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication) or inter-BS communication (e.g., relay, integrated access backhaul (IAB)). The wireless device and the BS / wireless device may send / receive radio signals to / from each other through wireless communication / connection 150a and 150b. For example, wireless communication / connection 150a and 150b may send / receive signals through various physical channels. To this end, at least a portion of various configuration information for configuring processes for sending / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes may be performed based on various proposals of the present disclosure.

[0257] Fig.16 A wireless device suitable for use with the present disclosure is shown.

[0258] Reference Fig.16 , the first wireless device 100 and the second wireless device 200 may transmit radio signals via various RATs (e.g., LTE and NR). Herein, {the first wireless device 100 and the second wireless device 200} may correspond to Fig.15 {wireless device 100x and BS 200} and / or {wireless device 100x and wireless device 100x}.

[0259] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and further include one or more transceivers 106 and / or one or more antennas 108. The processor 102 may control the memory 104 and / or the transceiver 106, and may be configured to implement the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. For example, the processor 102 may process the information in the memory 104 to generate first information / signals, and then transmit a radio signal including the first information / signals through the transceiver 106. The processor 102 may receive a radio signal including second information / signals through the transceiver 106, and then store information obtained by processing the second information / signals in the memory 104. The memory 104 may be connected to the processor 102, and may store various information related to the operation of the processor 102. For example, the memory 104 may store software codes including commands for executing part or all of the processes controlled by the processor 102 or for executing the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. Herein, the processor 102 and the memory 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 106 may be connected to the processor 102 and transmit and / or receive radio signals through one or more antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. The transceiver 106 may be used interchangeably with a radio frequency (RF) unit. In an embodiment of the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0260] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and further include one or more transceivers 206 and / or one or more antennas 208. The processor 202 may control the memory 204 and / or the transceiver 206, and may be configured to implement the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. For example, the processor 202 may process the information in the memory 204 to generate third information / signals, and then transmit a radio signal including the third information / signals through the transceiver 206. The processor 202 may receive a radio signal including fourth information / signals through the transceiver 206, and then store information obtained by processing the fourth information / signals in the memory 204. The memory 204 may be connected to the processor 202, and may store various information related to the operation of the processor 202. For example, the memory 204 may store software codes including commands for executing part or all of the processes controlled by the processor 202 or for executing the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. Herein, the processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 206 may be connected to the processor 202 and transmit and / or receive radio signals through one or more antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. The transceiver 206 may be used interchangeably with an RF unit. In an embodiment of the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0261] In the following, the hardware elements of the wireless devices 100 and 200 will be described in more detail. One or more protocol layers may be implemented by (but not limited to) one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). One or more processors 102 and 202 may generate one or more protocol data units (PDUs) and / or one or more service data units (SDUs) according to the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document. One or more processors 102 and 202 may generate a signal (e.g., a baseband signal) including a PDU, SDU, message, control information, data, or information according to the description, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document, and provide the generated signal to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive a signal (e.g., a baseband signal) from one or more transceivers 106 and 206 and obtain the PDU, SDU, message, control information, data, or information according to the description, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document.

[0262] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. As an example, one or more application specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field programmable gate arrays (FPGAs) may be included in one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed in this document may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204 to be driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods and / or operational flow charts disclosed in this document may be implemented in the form of codes, commands and / or command sets using firmware or software.

[0263] One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, codes, instructions and / or commands. One or more memories 104 and 204 may be configured by read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard disk drive, register, cache memory, computer-readable storage medium and / or a combination thereof. One or more memories 104 and 204 may be located inside and / or outside of one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 by various technologies such as wired or wireless connections.

[0264] One or more transceivers 106 and 206 may send user data, control information and / or radio signals / channels mentioned in the method and / or operation flow chart of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information and / or radio signals / channels mentioned in the description, function, process, proposal, method and / or operation flow chart disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and send and receive radio signals. For example, one or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may send user data, control information or radio signals to one or more other devices. One or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may receive user data, control information or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to send and receive user data, control information and / or radio signals / channels mentioned in the description, functions, processes, proposals, methods and / or operation flow charts disclosed in this document through one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received radio signals / channels, etc. from RF band signals to baseband signals so as to process received user data, control information, radio signals / channels, etc. using one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc. processed using one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more of the transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0265] Fig.17 Another example of a wireless device applicable to the present disclosure is shown. The wireless device can be used according to the usage / service (refer to Fig.15 ) are implemented in various forms.

[0266] Reference Fig.17 , the wireless devices 100 and 200 may correspond to Fig.16The wireless devices 100 and 200 of the present invention may be configured by various elements, components, units / parts and / or modules. For example, each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130 and an additional component 140. The communication unit may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include Fig.16 One or more processors 102 and 202 and / or one or more memories 104 and 204. For example, the transceiver 114 may include Fig.16 The control unit 120 is electrically connected to the communication unit 110, the memory 130, and the additional components 140, and controls the overall operation of the wireless device. For example, the control unit 120 may control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit 130. The control unit 120 may send information stored in the memory unit 130 to the outside (e.g., other communication devices) via the communication unit 110 through a wireless / wired interface, or store information received from the outside (e.g., other communication devices) via the communication unit 110 in the memory unit 130 through a wireless / wired interface.

[0267] The additional components 140 may be configured differently depending on the type of wireless device. For example, the additional components 140 may include at least one of a power supply unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device may be configured in the form of, but not limited to, a robot ( Fig.15 100a), vehicles ( Fig.15 100b-1 and 100b-2), XR devices ( Fig.15 100c), handheld device ( Fig.15 100d), household appliances ( Fig.15 100e), IoT devices ( Fig.15 100f), digital broadcasting terminal, holographic device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate / environmental device, AI server / device ( Fig.15 400), BS( Fig.15 200), network nodes, etc. The wireless device can be used in a mobile or fixed location according to the usage example / service.

[0268] exist Fig.17In the wireless devices 100 and 200, various elements, components, units / parts and / or modules in the wireless devices 100 and 200 may all be connected to each other through a wired interface, or at least a part thereof may be wirelessly connected through the communication unit 110. For example, in each of the wireless devices 100 and 200, the control unit 120 and the communication unit 110 may be wired, and the control unit 120 and the first unit (e.g., 130 and 140) may be wirelessly connected through the communication unit 110. The various elements, components, units / parts and / or modules within the wireless devices 100 and 200 may also include one or more elements. For example, the control unit 120 may be configured by a collection of one or more processors. As an example, the control unit 120 may be configured by a collection of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing unit and a memory control processor. As another example, the memory 130 may be configured by a random access memory (RAM), a dynamic RAM (DRAM), a read-only memory (ROM)), a flash memory, a volatile memory, a non-volatile memory and / or a combination thereof.

[0269] Fig.18 A vehicle or an autonomous vehicle applied to the present disclosure is shown. The vehicle or the autonomous vehicle can be implemented by a mobile robot, a car, a train, a manned / unmanned aerial vehicle (AV), a ship, etc.

[0270] Reference Fig.18 , the vehicle or autonomous driving vehicle 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a drive unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 may be configured as a part of the communication unit 110. Blocks 110 / 130 / 140a to 140d correspond to Fig.17 Block 110 / 130 / 140.

[0271] The communication unit 110 may send and receive signals (e.g., data and control signals) to and from external devices such as other vehicles, BSs (e.g., gNBs and roadside units), and servers. The control unit 120 may perform various operations by controlling elements of the vehicle or autonomous vehicle 100. The control unit 120 may include an electronic control unit (ECU). The drive unit 140a may enable the vehicle or autonomous vehicle 100 to travel on a road. The drive unit 140a may include an engine, a motor, a power system, wheels, brakes, a steering device, etc. The power supply unit 140b may supply power to the vehicle or autonomous vehicle 100, and include a wired / wireless charging circuit, a battery, etc. The sensor unit 140c may obtain vehicle status, surrounding environment information, user information, etc. The sensor unit 140c may include an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, a slope sensor, a weight sensor, a heading sensor, a position module, a vehicle forward / backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a depth sensor, an ultrasonic sensor, a lighting sensor, a pedal position sensor, etc. The autonomous driving unit 140d may implement a technology for maintaining a lane in which the vehicle is traveling, a technology for automatically adjusting a speed (e.g., adaptive cruise control), a technology for autonomously traveling along a determined path, a technology for traveling by automatically setting a path if a destination is set, and the like.

[0272] For example, the communication unit 110 may receive map data, traffic information data, etc. from an external server. The autonomous driving unit 140d may generate an autonomous driving path and a driving plan from the obtained data. The control unit 120 may control the drive unit 140a so that the vehicle or the autonomous driving vehicle 100 may move along the autonomous driving path according to the driving plan (e.g., speed / direction control). In the middle of autonomous driving, the communication unit 110 may aperiodically / periodically obtain the latest traffic information data from the external server and obtain surrounding traffic information data from neighboring vehicles. In the middle of autonomous driving, the sensor unit 140c may obtain vehicle status and / or surrounding environment information. The autonomous driving unit 140d may update the autonomous driving path and driving plan based on the newly obtained data / information. The communication unit 110 may transmit information about the vehicle position, autonomous driving path, and / or driving plan to an external server. The external server may predict traffic information data based on information collected from the vehicle or autonomous driving vehicle using AI technology, etc., and provide the predicted traffic information data to the vehicle or autonomous driving vehicle.

[0273] The above-mentioned embodiments correspond to the combination of elements and features of the present disclosure in a prescribed form. And, unless explicitly mentioned, each element or feature may be regarded as selective. Each element or feature may be implemented in a form that is not combined with other elements or features. In addition, the embodiments of the present disclosure can be implemented by partially combining elements and / or features together. The order of operations described for each embodiment of the present disclosure may be modified. Some configurations or features of an embodiment may be included in another embodiment, or may replace the corresponding configuration or features of another embodiment. And, the embodiment may be configured by combining claims that do not have a clear reference relationship in the attached claims, or may be included as a new claim by modification after submitting the application.

[0274] Those skilled in the art will appreciate that the present disclosure may be implemented in other specific forms other than those described herein without departing from the spirit and essential characteristics of the present disclosure. Therefore, the above-described embodiments should be interpreted as being illustrative in all respects, rather than restrictive. The scope of the present disclosure should be determined by the appended claims and their legal equivalents, rather than by the above description, and all changes falling within the meaning and equivalent scope of the appended claims are intended to be covered therein.

[0275] Industrial Applicability

[0276] The present disclosure is applicable to UE, BS or other devices in a wireless mobile communication system.

Claims

1. A method for performing positioning-related measurements by a first device in a wireless communication system, the method comprising the following steps: sending device capability information to the network for informing that the first device is capable of operating as a positioning reference unit (PRU) providing a reference position for positioning; receiving configuration information regarding measurements to be performed by the first device as the PRU; as well as reporting to the network the measurements of the PRU performed based on the configuration information, Wherein, based on the first device operating as the PRU: performing measurement reporting for all reference signal resources included in the configuration information; and The measurement report for all the reference signal resources includes information about the reference signal resources where measurement failure occurs.

2. The method according to claim 1, wherein: The information about the reference signal resource where the measurement failure occurs includes at least one of a measurement failure indication and a measurement failure cause.

3. The method according to claim 2, wherein: The measurement report for all the reference signal resources includes phase measurement values ​​for remaining reference signal resources except the reference signal resource where the measurement failure occurs.

4. The method according to claim 3, wherein: Each phase measurement is expressed as mod(2πfcτ0,2π), where fc represents the carrier frequency, τ0 represents the propagation delay of the reference signal, and mod represents a modular operation.

5. The method according to claim 1, wherein: The configuration information includes information about a measurement duration of the PRU and information about a resource set for all of the reference signal resources.

6. The method according to claim 1, wherein: The measurements of the PRU include carrier phase measurements CPM for positioning of a target user equipment UE.

7. The method according to claim 6, wherein: The location of the PRU is known to the network, and The CPM of the PRU is related to the correction of the CPM error of the target UE.

8. The method according to claim 6, wherein: The measurements of the PRU also include measurements of a different type than the CPM, and The different types of measurements are related to at least one of the time of arrival ToA, the time difference of arrival TDOA, the subcarrier phase measurement ScPM, the angle of departure AoD or the angle of arrival AoA.

9. The method according to claim 1, wherein: The reference signal resource is a downlink positioning reference signal PRS resource, and The first device is a user equipment UE. 10 . A processor-readable recording medium having recorded thereon a program for executing the method according to claim 1 .

11. A first device for wireless communication, the first device comprising: a memory configured to store instructions; as well as a processor configured to perform operations by executing the instructions, The operation of the processor includes: sending device capability information to the network for informing that the first device is capable of operating as a positioning reference unit (PRU) providing a reference position for positioning; receiving configuration information about measurements to be performed by the first device as the PRU; and reporting to the network the measurements of the PRU performed based on the configuration information, Wherein, based on the first device operating as the PRU: performing measurement reporting for all reference signal resources included in the configuration information; and The measurement report for all the reference signal resources includes information about the reference signal resources where measurement failure occurs.

12. The first device according to claim 11, further comprising: Transceiver, The first device is a user equipment UE operating in a wireless communication system.

13. The first device according to claim 11, wherein: The first device is a processing device configured to control a user equipment UE operating in a wireless communication system.

14. A method for receiving a measurement report from a first device by a second device in a wireless communication system, the method comprising the following steps: receiving, from the first device, device capability information informing that the first device is capable of operating as a positioning reference unit (PRU) providing a reference position for positioning; sending configuration information about measurements to be performed by the first device as the PRU; as well as receiving, from the first device, a measurement report of the PRU performed based on the configuration information, The measurement report of the PRU includes measurement results for all reference signal resources included in the configuration information, and The measurement results for all the reference signal resources include information about the reference signal resources where measurement failure occurs.

15. A second device for wireless communication, the second device comprising: a memory configured to store instructions; as well as a processor configured to perform operations by executing the instructions, The operation of the processor includes: receiving, from a first device, device capability information informing that the first device is capable of operating as a positioning reference unit (PRU) providing a reference position for positioning; sending configuration information about measurements to be performed by the first device as the PRU; and receiving, from the first device, a measurement report of the PRU performed based on the configuration information, The measurement report of the PRU includes measurement results for all reference signal resources included in the configuration information, and The measurement results for all the reference signal resources include information about the reference signal resources where measurement failure occurs.

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