Method and apparatus for transmitting and receiving radio signals in a radio communication system

Abstract

In a wireless communication system according to at least one of the examples disclosed in this specification, a method for a terminal to transmit a measurement report includes measuring a carrier phase for a reference signal for positioning at each of a plurality of time points; determining at least one RSCPD (reference signal carrier phase difference) value based on the carrier phase measurement; and transmitting a measurement report related to positioning including the at least one RSCPD value, wherein each of the at least one RSCPD value can be determined based on a time point among the plurality of time points at which the carrier phase is measured at which phase continuity of the terminal is maintained.

Description

[Technical Field]

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

[0002] Wireless communication systems have been widely deployed to provide various communication services such as voice and data. Generally, wireless communication systems are multiple access systems that support communication with multiple users by sharing available system resources (e.g., bandwidth, transmission power, etc.). Examples of multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, and single carrier frequency division multiple access (SC-FDMA) systems. Summary of the Invention [Problem to be solved by the invention]

[0003] The technical problem to be solved by the present invention is to provide a method for transmitting or receiving signals more accurately and efficiently in a wireless communication system, and a device therefor.

[0004] The technical objectives to be achieved by the present invention are not limited to the above-mentioned technical objectives, and other technical objectives can be inferred from the following examples. [Means for solving the problem]

[0005] In one aspect of a wireless communication system, a method for a terminal to transmit a measurement report includes (comprising; configuring; establishing; setting; including; containing; having); measuring a carrier phase for a reference signal for positioning at each of a plurality of time points; determining at least one RSCPD (reference signal carrier phase difference) value based on the carrier phase measurement; and transmitting a measurement report related to positioning including the at least one RSCPD value, wherein each of the at least one RSCPD value can be determined based on a time point among the plurality of time points at which the carrier phase is measured at which phase continuity of the terminal is maintained.

[0006] The terminal may determine that the phase continuity is maintained for a time point that belongs to a time interval in which a change in an initial phase error is less than a threshold.

[0007] The time point at which the phase continuity is maintained may include a reference time point.

[0008] Each RSCPD value can be determined based on the difference between the phase measurement value at the reference time point and the phase measurement value at another time point paired with the reference time point.

[0009] The reference time point may be a time point at which the reference signal for positioning is received from a reference TRP (transmission reception point) among one or more TRPs that transmit the reference signal for positioning.

[0010] The number of symbols included in the time gap between the reference time point and the other time point may be equal to or less than a predetermined number.

[0011] The terminal may determine that the phase continuity is not maintained based on at least one of (i) uplink transmission for a single spectrum (unpaired spectrum), (ii) downlink reception scheduling or downlink monitoring occurring between two time points for phase measurement, and (iii) downlink frequency hopping or downlink bandwidth part switching occurring between two time points for phase measurement.

[0012] The measurement report may include an identification of a reference reference signal resource associated with the at least one RSCPD value.

[0013] The reference signal resource may be the same for all of the at least one RSCPD value.

[0014] According to another aspect, a processor-readable recording medium having a program for executing the measurement reporting method described above recorded thereon may be provided.

[0015] According to yet another aspect, a device for wireless communication includes a memory that stores instructions; and a processor that operates by executing the instructions, wherein the operations of the processor include measuring a carrier phase for a reference signal for positioning at each of a plurality of time points; determining at least one reference signal carrier phase difference (RSCPD) value based on the carrier phase measurements; and transmitting a measurement report related to positioning that includes the at least one RSCPD value, wherein each of the at least one RSCPD value can be determined based on a time point among the plurality of time points at which the carrier phase is measured, at which phase continuity of the device is maintained.

[0016] The device may further include a transceiver.

[0017] The device may be a terminal operating in a wireless communication system.

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

[0019] In another aspect of a wireless communication system, a method for receiving a measurement report from a terminal by an apparatus including at least one transmission and reception point (TRP) includes transmitting a reference signal for positioning at a plurality of time points; and receiving a measurement report from the terminal related to a carrier phase of the reference signal for positioning measured at each of the plurality of time points, wherein the measurement report includes at least one reference signal carrier phase difference (RSCPD) value, and each of the at least one RSCPD value may be determined based on a time point at which phase continuity of the terminal is maintained among the plurality of time points at which the carrier phase is measured.

[0020] According to another aspect, a processor-readable recording medium having a program for executing the measurement report receiving method described above recorded thereon may be provided.

[0021] According to another aspect, an apparatus including at least one transmission and reception point (TRP) includes at least one memory that stores instructions; and at least one processor that operates by executing the instructions, wherein the operation of the at least one processor includes transmitting a reference signal for positioning at a plurality of time points; and receiving a measurement report from a terminal related to a carrier phase of the reference signal for positioning measured at each of the plurality of time points, the measurement report including at least one reference signal carrier phase difference (RSCPD) value, and each of the at least one RSCPD value may be determined based on a time point at which phase continuity of the terminal is maintained among the plurality of time points at which the carrier phase is measured. [Effects of the Invention]

[0022] According to an embodiment of the present invention, signals can be transmitted or received more accurately and efficiently in a wireless communication system.

[0023] The effects obtained by the present invention are not limited to those mentioned above, and other effects can be inferred from the following examples. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a diagram illustrating physical channels used in a 3GPP system, which is an example of a wireless communication system, and a general signal transmission method using these channels. [Figure 2] FIG. 1 is a diagram illustrating the structure of a radio frame. [Figure 3] FIG. 1 illustrates a resource grid of slots. [Figure 4] FIG. 10 is a diagram showing an example of mapping physical channels within a slot. [Figure 5] FIG. 10 is a diagram illustrating a PDSCH reception and ACK / NACK transmission process. [Figure 6] FIG. 1 illustrates a PUSCH transmission process. [Figure 7] FIG. 10 is a diagram illustrating an example of positioning protocol settings. [Figure 8] FIG. 1 is a diagram illustrating an example of OTDOA. [Figure 9] FIG. 1 is a diagram illustrating an example of Multi RTT. [Figure 10] A diagram showing a procedure for operation of a network node (e.g., an upper node of a terminal, an LMF, etc.) according to one embodiment. [Figure 11] FIG. 10 is a diagram illustrating a procedure for terminal operation to perform positioning measurements. [Figure 12] FIG. 1 illustrates various ISAC environments. [Figure 13] 10A and 10B are diagrams for explaining phase errors of DL PRSs transmitted through different antennas. [Figure 14] FIG. 10 is a diagram for explaining a phase error of DL PRS transmitted through different base stations (TRP / TP). [Figure 15] FIG. 10 is a diagram for explaining a phase error of DL PRS transmitted at different times. [Figure 16] FIG. 1 is a diagram for explaining procedures related to RSCPD for positioning in a wireless communication system according to one embodiment. [Figure 17] FIG. 10 is a diagram showing the flow of a measurement report transmission method according to one embodiment. [Figure 18] FIG. 10 is a diagram showing the flow of a measurement report receiving method according to an embodiment. [Figure 19-22] 1 is a diagram illustrating a communication system 1 and a wireless device applicable to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0025] The following technologies can be used for various wireless access systems, 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 using radio technologies such as Universal Terrestrial Radio Access (UTRA) and CDMA2000. TDMA can be implemented using radio technologies such as Global System for Mobile communications (GSM), General Packet Radio Service (GPRS), and Enhanced Data Rates for GSM Evolution (EDGE). OFDMA can be implemented using radio technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and Evolved UTRA (E-UTRA). UTRA is part of the Universal Mobile Telecommunications System (UMTS). 3GPP (3rd Generation Partnership Project: registered trademark; the same applies hereinafter) LTE (long term evolution) is a part of E-UMTS (Evolved UMTS) that uses E-UTRA, and LTE-A (Advanced) 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.

[0026] As more communication devices require larger communication capacities, there is an emerging need for improved mobile broadband communication compared to existing RATs (Radio Access Technologies). Massive Machine Type Communications (MTC), which connects multiple devices and objects to provide various services anytime, anywhere, is one of the important issues to consider in next-generation communications. Furthermore, communication system designs that take into account reliability- and latency-sensitive services / terminals are being discussed. Thus, the introduction of next-generation RATs that take into account eMBB (enhanced Mobile Broadband Communication), massive MTC, and URLLC (Ultra-Reliable and Low Latency Communication) is being discussed. In one embodiment of the present invention, for convenience, the relevant technologies are referred to as NR (New radio or New RAT).

[0027] The term "base station" used in this specification may be replaced with terms such as fixed station, Node B, gNode B (gNB), access point (AP), cell, or transmission and reception point (TRP). A repeater may be replaced with terms such as relay node (RN) or relay station. In addition, the term "terminal" may be replaced with terms such as user equipment (UE), mobile station (MS), mobile subscriber station (MSS), or subscriber station (SS).

[0028] For clarity of explanation, the description will be focused on 3GPP NR, but the technical idea of ​​the present invention is not limited thereto.

[0029] For background, terms, definitions, abbreviations, etc. relevant to this invention, the following documents may be referenced (Incorporated by Reference):

[0030] - 38.211: Physical channels and modulation

[0031] - 38.212: Multiplexing and channel coding

[0032] - 38.213: Physical layer procedures for control

[0033] - 38.214: Physical layer procedures for data

[0034] - 38.215: Physical layer measurements

[0035] - 38.300: NR and NG-RAN Overall Description

[0036] - 38.304: User Equipment (UE) procedures in idle mode and in RRC Inactive state

[0037] - 38.321Medium Access Control (MAC) protocol specification

[0038] - 38.331: Radio Resource Control (RRC) protocol specification

[0039] - 37.213: Introduction of channel access procedures to unlicensed spectrum for NR-based access

[0040] - 36.355: LTE Positioning Protocol

[0041] - 37.355: LTE Positioning Protocol

[0042] Terms and Abbreviations

[0043] - 5GC: 5G Core Network

[0044] - 5GS: 5G System

[0045] - AoA: Angle of Arrival

[0046] - AP: Access Point

[0047] - CID: Cell ID

[0048] - E-CID: Enhanced Cell ID

[0049] - GNSS: Global Navigation Satellite System

[0050] - GPS: Global Positioning System

[0051] - LCS: LoCation Service

[0052] - LMF: Location Management Function

[0053] - LPP: LTE Positioning Protocol

[0054] - MO-LR: Mobile Originated Location Request

[0055] - MT-LR: Mobile Terminated Location Request

[0056] - NRPPa: NR Positioning Protocol A

[0057] - OTDOA: Observed Time Difference Of Arrival

[0058] - PDU: Protocol Data Unit

[0059] - PRS: Positioning Reference Signal

[0060] - RRM: Radio Resource Management

[0061] - RSSI: Received Signal Strength Indicator

[0062] - RSTD: Reference Signal Time Difference

[0063] - ToA: Time of Arrival

[0064] - TP: Transmission Point

[0065] - TRP: Transmission and Reception Point

[0066] - UE: User Equipment

[0067] - SS: Search Space

[0068] - CSS: Common Search Space

[0069] - USS: UE-specific Search Space

[0070] - PDCCH: Physical Downlink Control Channel

[0071] - PDSCH: Physical Downlink Shared Channel;

[0072] - PUCCH: Physical Uplink Control Channel;

[0073] - PUSCH: Physical Uplink Shared Channel;

[0074] - DCI: Downlink Control Information

[0075] - UCI: Uplink Control Information

[0076] - SI: System Information

[0077] - SIB: System Information Block

[0078] - MIB: Master Information Block

[0079] - RRC: Radio Resource Control

[0080] - DRX: Discontinuous Reception

[0081] - RNTI: Radio Network Temporary Identifier

[0082] - CSI: Channel state information

[0083] - PCell: Primary Cell

[0084] - SCell: Secondary Cell

[0085] - PSCell: Primary SCG(Secondary Cell Group) Cell

[0086] - CA: Carrier Aggregation

[0087] - WUS: Wake up Signal

[0088] - TX: Transmitter

[0089] - RX: Receiver

[0090] - RSTD: Reference Signal Time Difference

[0091] - RS: Reference Signal

[0092] - PRS: Positioning Reference Signal

[0093] - SRS: Sounding Reference Signal

[0094] In a wireless communication system, a terminal receives information from a base station via a downlink (DL), and transmits information from the base station via an uplink (UL). The information transmitted and received between the base station and the terminal includes data and various control information, and various physical channels exist depending on the type and purpose of the information transmitted and received.

[0095] FIG. 1 is a diagram illustrating physical channels used in a 3GPP NR system and a typical signal transmission method using these channels.

[0096] When a terminal is powered on from a power-off state or newly enters a cell, it performs an initial cell search, such as establishing synchronization with a base station, in step S101. To this end, the terminal receives a synchronization signal block (SSB) from the base station. The SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH). The terminal establishes synchronization with the base station based on the PSS / SSS and obtains information such as a cell identity. The terminal also obtains broadcast information within the cell based on the PBCH. In addition, during the initial cell search, the terminal can receive a downlink reference signal (DL RS) to check the status of the downlink channel.

[0097] After completing the initial cell search, the terminal receives a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) based on information from the physical downlink control channel in step S102 to obtain more specific system information.

[0098] Thereafter, the terminal performs a random access procedure, such as steps S103 to S106, to complete connection to the base station. To this end, the terminal transmits a preamble over a physical random access channel (PRACH) (S103) and receives a response message to the preamble over a physical downlink control channel and a corresponding physical downlink shared channel (S104). In the case of contention-based random access, the terminal performs a contention resolution procedure, such as transmitting a further physical random access channel (S105) and receiving a physical downlink control channel and a corresponding physical downlink shared channel (S106).

[0099] After performing this procedure, the terminal then receives a physical downlink control channel / physical downlink shared channel (S107) and transmits a physical uplink shared channel (PUSCH) / physical uplink control channel (PUCCH) as a general uplink / downlink signal transmission procedure (S108). The control information transmitted by the terminal to the base station is collectively referred to as uplink control information (UCI). UCI includes HARQ ACK / NACK (Hybrid Automatic Repeat and reQuest Acknowledgement / Negative-ACK), SR (Scheduling Request), CSI (Channel State Information), etc. CSI includes CQI (Channel Quality Indicator), PMI (Precoding Matrix Indicator), RI (Rank Indication), etc. UCI is generally transmitted via PUCCH, but when control information and traffic data need to be transmitted simultaneously, it is transmitted via PUSCH. In addition, UCI can be transmitted aperiodically via PUSCH at the request / instruction of the network.

[0100] Figure 2 illustrates the structure of a radio frame. In NR, uplink and downlink transmissions are organized into frames. A radio frame has a length of 10 ms and is divided into two 5 ms half-frames (HF). Each half-frame is divided into five 1 ms subframes (SF). A subframe is divided into one or more slots, and the number of slots within a subframe depends on the subcarrier spacing (SCS). Each slot contains 12 or 14 orthogonal frequency division multiplexing (OFDM) symbols, depending on the cyclic prefix (CP). If a normal CP is used, each slot contains 14 symbols. If an extended CP is used, each slot contains 12 symbols.

[0101] Table 1 illustrates that when a general CP is used, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe change depending on the SCS.

[0102] [Table 1]

[0103] *N slot symb : Number of symbols in the slot

[0104] *N frame,u slot : Number of slots in the frame

[0105] *N subframe,u slot : Number of slots in a subframe

[0106] Table 2 illustrates how the number of symbols per slot, the number of slots per frame, and the number of slots per subframe change depending on the SCS when an extended CP is used.

[0107] [Table 2]

[0108] The frame structure is illustrative only, and the number of subframes, slots, and symbols in a frame can vary.

[0109] In an NR system, OFDM numerology (e.g., SCS) can be configured to be different among multiple cells merged into one terminal. Accordingly, the (absolute time) duration of time resources (e.g., SF, slot, or TTI) (collectively referred to as TU (Time Unit) for convenience) consisting of the same number of symbols can be configured to be different among the merged cells. Here, the symbols include OFDM symbols (or CP-OFDM symbols) and SC-FDMA symbols (or Discrete Fourier Transform-spread-OFDM, DFT-s-OFDM symbols).

[0110] FIG. 3 illustrates a resource grid of a slot. A slot includes multiple symbols in the time domain. For example, in the case of a general CP, one slot includes 14 symbols, while in the case of an extended CP, one slot includes 12 symbols. A carrier includes multiple subcarriers in the frequency domain. A resource block (RB) is defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. A BWP is defined as multiple consecutive physical RBs (PRBs) in the frequency domain and can correspond to one numerology (e.g., SCS, CP length, etc.). A carrier includes up to N BWPs (e.g., 5 BWPs). Data communication is performed using activated BWPs, and only one BWP can be activated for one UE. Each element in the resource grid is called a resource element (RE), and one complex symbol can be mapped to it.

[0111] FIG. 4 illustrates an example of mapping physical channels within a slot. In an NR system, a frame is characterized by a self-contained structure in which a DL control channel, DL or UL data, and a UL control channel are all included within one slot. For example, the first N symbols in a slot are used to transmit a DL control channel (e.g., PDCCH) (hereinafter referred to as the DL control region), and the last M symbols in the slot are used to transmit a UL control channel (e.g., PUCCH) (hereinafter referred to as the UL control region). N and M are each an integer greater than or equal to 0. The resource region between the DL control region and the UL control region (hereinafter referred to as the data region) is used to transmit DL data (e.g., PDSCH) or UL data (e.g., PUSCH). The GP provides a time gap when the base station and the UE switch from transmission mode to reception mode or from reception mode to transmission mode. Some symbols at the time of switching from DL to UL within a subframe can be set as the GP.

[0112] The PDCCH carries Downlink Control Information (DCI). For example, the PCCCH (i.e., DCI) carries the transmission format and resource allocation of the downlink shared channel (DL-SCH), resource allocation information for the uplink shared channel (UL-SCH), paging information for the Paging Channel (PCH), system information on the DL-SCH, resource allocation information for higher layer control messages such as random access responses transmitted on the PDSCH, transmit power control commands, and activation / deactivation of configured scheduling (CS). The DCI includes a cyclic redundancy check (CRC), which is masked / scrambled with various identifiers (e.g., Radio Network Temporary Identifier, RNTI) depending on the owner or use of the PDCCH. For example, if the PDCCH is for a specific terminal, the CRC is masked with a terminal identifier (e.g., Cell-RNTI, C-RNTI). If the PDCCH is related to paging, the CRC is masked with a Paging-RNTI (P-RNTI). If the PDCCH is related to system information (e.g., System Information Block, SIB), the CRC is masked with a System Information RNTI (SI-RNTI). If the PDCCH is related to a random access response, the CRC is masked with a Random Access RNTI (RA-RNTI).

[0113] FIG. 5 illustrates a process of receiving a PDSCH and transmitting an ACK / NACK. Referring to FIG. 5, a terminal detects a PDCCH in slot #n. Here, the PDCCH includes downlink scheduling information (e.g., DCI format 1_0, 1_1), and indicates a DL assignment-to-PDSCH offset (K0) and a PDSCH-HARQ-ACK reporting offset (K1). After receiving a PDSCH from slot #(n+K0) according to the scheduling information of slot #n, the terminal transmits UCI via a PUCCH in slot #(n1+K1) when reception of the PDSCH ends in slot #n1 (where n+K0≦n1). Here, the UCI includes a HARQ-ACK response to the PDSCH. If the PDSCH is configured to transmit a maximum of one TB, the HARQ-ACK response is configured as 1 bit. When the PDSCH is configured to transmit up to two TBs, the HARQ-ACK response consists of 2 bits if spatial bundling is not configured, and 1 bit if spatial handling is configured. If the HARQ-ACK transmission time for multiple PDSCHs is specified as slot #(n+K1), the UCI transmitted in slot #(n+K1) includes the HARQ-ACK response for multiple PDSCHs.

[0114] 6 is a diagram illustrating a PUSCH transmission process. Referring to FIG. 6, a terminal detects a PDCCH in slot #n. Here, the PDCCH includes uplink scheduling information (e.g., DCI format 0_0, 0_1). The terminal transmits a PUSCH in slot #(n+K2) according to the scheduling information of slot #n. Here, the PUSCH includes an UL-SCH TB.

[0115] Positioning

[0116] Positioning refers to measuring radio signals to determine the geographical location and / or velocity of a user equipment (UE). Location information is requested by a client (e.g., an application) associated with the UE and reported to the client. Location information may also be included in a core network or requested by a client connected to the core network. Location information is reported in a standard format, such as cell-based or geographic coordinates, and may include estimated error values ​​for the UE's location and velocity and / or the positioning method used for positioning.

[0117] FIG. 7 is a diagram illustrating an example of a positioning protocol configuration for determining the location of a terminal.

[0118] 7, the LPP is used as a point-to-point between a location server (E-SMLC and / or SLP and / or LMF) and a target device (UE and / or SET) to position the target device (UE and / or SET) using position-related measurements obtained from one or more reference sources. Via the LPP, the target device and the location server exchange measurement and / or location information based on Signal A and / or Signal B.

[0119] The NRPPa is used for information exchange between the reference source (ACCESS NODE and / or BS and / or TP and / or NG-RAN node) and the location server.

[0120] The functions provided by the NRPPa protocol include:

[0121] - E-CID Location Information Transfer: This function exchanges location information between the reference source and the LMF for the purpose of E-CID positioning.

[0122] - OTDOA Information Transfer: This function exchanges information between the reference source and the LMF for the purpose of OTDOA positioning.

[0123] - Reporting of General Error Situations: This function reports general error situations for which no error message is defined for each function.

[0124] Positioning methods supported by NG-RAN include Global Navigation Satellite System (GNSS), OTDOA, enhanced cell ID (E-CID), barometric sensor positioning, WLAN positioning, Bluetooth positioning, terrestrial beacon system (TBS), and Uplink Time Difference of Arrival (UTDOA), etc. The location of a UE can be measured using any one of the positioning methods, or two or more of the positioning methods.

[0125] OTDOA(Observed Time Difference Of Arrival)

[0126] FIG. 8 is a diagram illustrating an example of an observed time difference of arrival (OTDOA) positioning method.

[0127] The OTDOA positioning method uses the measured timing of downlink signals received by a UE from multiple TPs, including eNBs, ng-eNBs, and TPs dedicated to PRSs. The UE measures the timing of the received downlink signals using location assistance data received from a location server. The UE then determines its location based on these measurements and the geographic coordinates of neighboring TPs.

[0128] A UE connected to a gNB can request a measurement gap for OTDOA measurement from a TP. If the UE cannot recognize the SFN for at least one TP in the OTDOA assistance data, the UE uses an autonomous gap to acquire the SFN of the OTDOA reference cell before requesting a measurement gap for performing Reference Signal Time Difference (RSTD) measurement.

[0129] Here, RSTD is defined based on the minimum relative time difference between the boundaries of two subframes received from the reference cell and the measurement cell, i.e., the relative time difference between the start time of the subframe of the reference cell that is closest to the start time of the subframe received from the measurement cell. Meanwhile, the reference cell is selected by the UE.

[0130] Accurate OTA measurements require measuring the time of arrival (TOA) of signals received from three or more geographically dispersed TPs or base stations. For example, the TOA for each of TP1, TP2, and TP3 can be measured, and the RSTD for TP1-TP2, RSTD for TP2-TP3, and RSTD for TP3-TP1 can be calculated based on the three TOAs. Based on this, a geometric hyperbola can be determined, and the intersection of these hyperbolae can be used to estimate the UE location. In this case, there may be accuracy and / or uncertainty for each TOA measurement, and the estimated UE location may be known within a predetermined range due to the measurement uncertainty.

[0131] For example, the RSTD for two TPs is calculated based on Equation 1.

[0132]

number

[0133] c is the speed of light, and {x t ,y t} are the (unknown) coordinates of the target UE, and {x i ,y i} are the coordinates of the (known) TP, and {x1, y1} are the coordinates of the reference TP (or other TP). i -T1) is the transmission time offset between two TPs, called "Real Time Differences" (RTDs), and n i , n1 denotes the value for the UE TOA measurement error.

[0134] E-CID (Enhanced Cell ID)

[0135] In the Cell ID (CID) positioning method, the location of the UE can be determined by geographic information of the UE's serving ng-eNB, serving gNB, and / or serving cell, for example, obtained by paging, registration, etc.

[0136] On the other hand, the E-CID positioning method can use, in addition to the CID positioning method, additional UE measurements and / or NG-RAN radio resources to improve UE location estimates. The E-CID positioning method can use some measurement methods similar to the measurement control system of the RRC protocol, but generally does not perform additional measurements solely for UE location measurement. In other words, no separate measurement configuration or measurement control message needs to be provided to measure the UE location, and the UE does not expect that additional measurement operations solely for location measurement will be requested, and can report measurements obtained by measurement methods that the UE can generally measure.

[0137] For example, the serving gNB implements the E-CID positioning method using E-UTRA measurement values ​​provided by the UE.

[0138] Below, examples of measurement elements that can be used for E-CID positioning are described.

[0139] - UE measurements: E-UTRA RSRP (Reference Signal Received Power), E-UTRA RSRQ (Reference Signal Received Quality), UE E-UTRA Rx-Tx Time Difference, GERAN / WLAN RSSI (Reference Signal Strength Indication), UTRAN CPICH (Common Pilot Channel) RSCP (Received Signal Code Power), UTRAN CPICH Ec / Io

[0140] - E-UTRAN measurements: ng-eNB Rx-Tx Time difference, Timing Advance (T ADV ), Angle of Arrival (AoA)

[0141] where T ADV are classified into Type 1 and Type 2 as follows:

[0142] T ADV Type 1 = (ng-eNB receive-transmit time difference) + (UE E-UTRA receive-transmit time difference)

[0143] T ADV Type 2 = ng-eNB receive-transmit time difference

[0144] Meanwhile, AoA is used to measure the direction of a UE. AoA is defined as the estimated angle to the UE's position counterclockwise from the base station / TP. Here, the geographic reference direction is north. The base station / TP can use uplink signals such as Sounding Reference Signal (SRS) and / or Demodulation Reference Signal (DMRS) for AoA measurement. In addition, the larger the antenna array, the higher the accuracy of AoA measurement. When antenna arrays are arranged at the same intervals, signals received at adjacent antenna elements have a certain phase change (phase rotation).

[0145] UTDOA(Uplink Time Difference of Arrival)

[0146] UTDOA is a method for estimating the arrival time of an SRS to determine the location of a UE. When calculating the estimated SRS arrival time, the serving cell is used as a reference cell, and the UE's location can be estimated based on the difference in arrival time from other cells (or base stations / TPs). To implement UTDOA, the E-SMLC instructs the target UE's serving cell to instruct the target UE to transmit an SRS. The E-SMLC also provides configurations such as periodic / aperiodic SRS, bandwidth, and frequency / group / sequence hopping.

[0147] Multi RTT (round trip time)

[0148] FIG. 9 is a diagram illustrating an example of a Multi RTT (round trip time) positioning method.

[0149] 9(a) illustrates an RTT process in which an initiating device and a responding device perform TOA measurements, and the responding device provides the TOA measurements to the initiating device for RTT measurement (calculation). For example, the initiating device may be a TRP and / or a terminal, and the responding device may be a terminal and / or a TRP.

[0150] The initiator sends an RTT measurement request, and the responder receives it (1301).

[0151] The initiator sends an RTT measurement signal at t0 and the responder takes a TOA measurement t1 (1303).

[0152] The responder sends an RTT measurement signal at t2 and the initiator takes a TOA measurement at t3 (1305).

[0153] The responding device transmits information about [t2-t1], and the initiating device receives the information and calculates the RTT based on Equation 2 (1307). The information may be transmitted and received based on a separate signal, or may be transmitted and received as part of the RTT measurement signal (1305).

[0154]

number

[0155] Referring to Figure 9(b), this RTT corresponds to a double-range measurement between two devices. Positioning estimation is performed from this information. Based on the measured RTT, d1, d2, and d3 are determined, and the target device location is determined by the intersection of circles with radii d1, d2, and d3 centered at each BS1, BS2, and BS3 (or TRP).

[0156] NG-RAN positioning architecture and procedures

[0157] 10 is a diagram illustrating a positioning structure of a next generation (NG) radio access network (RAN). The NR RAN is also referred to as an NR RAN or a 5G RAN.

[0158] The AMF receives a request for some location services related to a specific target UE from another entity (e.g., GMLC or UE), or decides to initiate some location services on behalf of a specific target UE (e.g., in the case of an IMS emergency call). The AMF then sends a location service request to the LMF. The LMF can process the location service request, which includes sending assistance data to the target UE and / or positioning the target UE for UE-based and / or UE-assisted positioning. The LMF sends the location service result (e.g., a location estimate for the UE) to the AMF. In the case of a location service requested by another entity other than the AMF (e.g., GMLC or UE), the AMF sends the location service result to the relevant entity.

[0159] The NG-RAN node can control TRP / TP such as RRM or DL-PRS only TP for PRS-based TBS support.

[0160] The LMF can connect to the E-SMLC to access UTRAN information.

[0161] The LMF interfaces with the SLP, which is responsible for positioning relative to the user plane.

[0162] FIG. 11 illustrates an example of location services supported by NG-RAN.

[0163] When the UE is in the CM-IDLE state, when the AMF receives a Location Service Request, the AMF performs a network-triggered service request to establish signaling for connection with the UE and allocation of a specific serving gNB / ng-eNB. In Figure 11, it is assumed that the UE is in a connected mode.

[0164] A location service request for the UE is triggered, and the location service request for the UE is any one of 1101, 1102, or 1103. For example, a 5GC entity (e.g., GMLC) requests some location services (e.g., positioning) for the target UE from the serving AMF (1101), the serving AMF triggers some location services for the target UE (e.g., to locate the UE for an emergency call) itself (1102), or the UE requests some location services (e.g., positioning or assistance data transmission) from the serving AMF at the NAS level (1103).

[0165] The AMF transmits the location service request to the LMF (1104).

[0166] The LMF initiates a positioning procedure with a nearby ng-eNB / gNB providing services in the NG-RAN to obtain position measurement or assistance data (1105).

[0167] (Alternatively or additionally to step 1105) the LMF initiates a positioning procedure with the UE to obtain a position estimate or positioning measurements or to transmit position assistance data to the UE (1106).

[0168] The LMF provides a location service response to the AMF (1107) (e.g., an indication of success or failure, a location estimate for the UE if requested and obtained).

[0169] (In case 1101) The AMF provides a location service response to the 5GC entity (1108) (e.g., location estimation for the UE).

[0170] (In case of 1102) The AMF uses the location service response received in step 1107 to support the service that triggered it in step 1102 (1109) (e.g., providing a location estimate related to an emergency call to the GMLC).

[0171] (In the case of 1103) the AMF provides a location service response to the UE (1110) (e.g., a location estimate for the UE).

[0172] ISAC(Integrated Sensing And Communication)

[0173] In recent wireless communication systems, various methods for utilizing wireless sensing have been discussed. While conventional radar technology has been considered for wireless sensing, it is limited in that radar technology is specialized for sensing and does not take communication characteristics into consideration, and transmitter / receiver nodes require separate devices to transmit and receive signals for wireless sensing. To address these issues, methods for utilizing wireless sensing in wireless communication systems that support communication using cellular networks, such as 5G and / or next-generation 6G (e.g., ISAC or JCAS (Joint Communication and Sensing)), have been actively researched in recent years.

[0174] 3GPP standardization has begun research to support ISACs for 5G / 6G. In TR 22.837, published by the 3GPP SA1 WG, wireless sensing is defined as a technology for acquiring information about environmental characteristics and / or surrounding objects, using radio waves to measure distance, angle, or instantaneous velocity. This document considers scenarios in which sensing and communication share the same frequency band and hardware. Sensing radio waves can be shared / reused with communication radio waves (e.g., using reference signals for communication (e.g., SSB, DMRS, CSI-RS, and / or SRS)), or radio waves can be separately designed for wireless sensing.

[0175] Generally, wireless sensing supported by ISAC can be considered to be performed through a process in which a signal transmitted from a transmitting end is reflected by a target object and received by a receiving end, and sensing modes for different scenarios can be defined depending on the relationship between the transmitting end and the receiving end. Based on whether the transmitting end and the receiving end are the same or not, a case in which the transmitting end and the receiving end are the same can be defined as a mono-static sensing mode, and a case in which the transmitting end and the receiving end are different can be defined as a bi-static sensing mode.

[0176] FIG. 12 is a diagram illustrating an example of a wireless sensing mode supported in the ISAC.

[0177] Referring to FIG. 12, when considering the transmission and reception operations in the 3GPP standard and the nodes participating therein, the sensing modes can be broadly divided as follows:

[0178] (a) BS mono-static sensing mode: The BS transmits radio waves and receives the reflected signals.

[0179] (b) BS-to-BS bi-static sensing mode: A specific BS receives a signal reflected from another BS.

[0180] (c) BS-to-UE bi-static sensing mode: The UE receives the reflected signal of the radio wave transmitted by the BS.

[0181] (d) BS mono-static sensing mode: The UE that transmitted the radio wave receives the reflected signal.

[0182] (e) UE-to-UE bi-static sensing mode: A signal reflected from a radio wave transmitted by a specific transmitting UE is received by another UE.

[0183] (f) UE-to-BS bi-static sensing mode: The BS receives the reflected signal of the radio wave transmitted by the transmitting UE.

[0184] However, in addition to the six use cases mentioned above, a sensing mode that includes multiple transmitting / receiving nodes may be referred to by the term multi-static sensing mode.

[0185] ISAC / JCAS wireless sensing is being considered for application to a variety of scenarios. Generally, wireless sensing aims to obtain information about targets that do not have a communication module (or are unrelated to a communication module). Possible scenarios can be broadly divided into the following three categories:

[0186] (1) Object detection and tracking: This is a scenario in which target objects or people are detected and their location information is tracked. Typical examples include intruder detection in indoor / outdoor environments, UAV or AGV location tracking, and autonomous driving support scenarios.

[0187] (2) Environment monitoring: This is a scenario aimed at collecting information about the surrounding environment of the transmitting / receiving node. Typical examples include observing rainfall information and detecting floods.

[0188] (3) Motion monitoring: This is a scenario in which the motion of a target is detected. A typical example would be a scenario for identifying human motions and gestures.

[0189] The performance indicators and their levels required for each of the above scenarios are diverse and may differ from one another. To design an ISAC / JCAS that is appropriate for the service quality required for each scenario, various key performance requirements must be considered. The 3GPP standard TS 22.137 document defines the key performance requirements for each service scenario, including positioning accuracy, velocity estimation accuracy, confidence level, sensing resolution, missed detection probability, false alarm probability, maximum sensing service delay, and refreshing rate. The required level for each key performance requirement may differ depending on the service scenario.

[0190] The suggestions discussed below are also applicable to the ISAC environment mentioned above.

[0191] DL RSPD measurements related to CPP

[0192] In NR, various methods are used to perform positioning, including timing-based methods (e.g., DL-TDOA, UL-RTOA, Multi RTT), angle-based methods (e.g., AoA, AoD), and Cell ID-based methods (e.g., E-CID), as mentioned above.

[0193] Additionally, Rel-18 is discussing the introduction of carrier phase measurement (CPP)-based positioning. CPP allows for phase measurement to be performed / utilized based on the carrier frequency of the received signal to measure the propagation delay of the reference signal caused by the distance between the base station and the terminal.

[0194] CPP considers a positioning method that utilizes phase measurement on a carrier frequency. Given the generally used high-frequency carrier frequency, distance information measured through phase measurement is highly accurate. For example, if a 3 GHz carrier frequency is used to transmit and receive a reference signal, the length of one wavelength, where the phase changes from 0 to 2π, is approximately 9.99 cm, meaning that the accuracy of distance discernible through phase is on the order of centimeters. However, to ensure such high-accuracy positioning, it is necessary to consider the impact of phase errors that affect phase measurement. Phase errors are caused by a variety of factors, including the implementation accuracy of the transmitter and receiver, momentary errors in hardware components, channel conditions due to mobility of the transmitter and receiver, multipath environments, and inaccurate prior information. These phase errors can affect the phase measurement results and significantly reduce positioning accuracy.

[0195] To attenuate / cancel the effect of phase errors and improve the positioning accuracy of CPP, a differencing method is used, which exploits the difference between multiple received measurements. As an example, consider two phase measurements affected by phase errors as follows:

[0196]

number

[0197] In Equation 3, Φ i k denotes the phase measurement at the kth subcarrier of the signal received by the i-th node, and Φ i tx and Φ i rx f indicates the effect of the initial phase error acting on the signal received by the i-th node. cand Δf denote the carrier frequency and the size of the SCS (subcarrier spacing), respectively, and η i k represents the error caused by effects such as AWGN (additive white Gaussian noise). If the above phase measurement is subject to the same initial receiver phase error (i.e., Φ 1 rx =Φ 2 rx ), Φ i rx The effect of Φ 1 k and Φ 2 k can be removed by the difference method, taking the difference of Φ i tx The influence of can be eliminated by a similar concept.

[0198] When a terminal receives a DL PRS transmitted from a base station and performs and reports a phase measurement therethrough, a Referencing Signal Phase Difference (RSPD) format can be used. Specifically, the RSPD measurement may be a method of calculating and reporting a difference between phase measurements measured for different TRPs (or PRS resources). The RSPD measurement may have a feature that, if the condition that the reception initial phase error is the same between the phase measurements used is satisfied, the reception initial phase error represents a value removed by a differential method.

[0199] Although this differential phase error cancellation method is very useful for obtaining precise phase measurements, it is necessary to satisfy the condition that a pair of different phase measurements that can be assumed to have the same phase error must be used. Generally, one type of phase error that can be assumed at the transmitting and receiving ends is an unpredictable initial phase error that can occur in the oscillators at the transmitting and receiving ends. The initial phase error can not only produce different values ​​between transmitted and received signals that use different oscillators, but can also cause differences between signals generated / measured at different times even when the same oscillator is used.

[0200] FIG. 13 is a diagram for explaining the phase error of DL PRS transmitted through different antennas.

[0201] Referring to FIG. 13, a DL PRS is transmitted from a base station (or TRP / TP), and PRS resources transmitted from different antennas are transmitted from different antennas. In this case, different initial phase errors may occur between the antenna from which PRS resource #1 is transmitted and the antenna from which PRS resource #2 is transmitted. If a differential method is not used, the positioning results obtained using PRS resource #1 and the positioning results obtained using PRS resource #2 may differ due to the influence of the different transmission initial phase errors. Even if a differential method is used, using a pair of phase measurements obtained through PRS resource #1 and PRS resource #2 to eliminate the transmission initial phase error may not be desirable because the influence of the transmission initial phase error is not completely canceled out.

[0202] FIG. 14 is a diagram for explaining the phase error of DL PRS transmitted through different base stations (TRP / TP).

[0203] 14 illustrates an example in which DL PRSs are transmitted from different base stations (TRP / TP), and the receiving end receives each PRS resource through a different antenna. In this case, different initial phase errors may occur between the antenna receiving PRS resource #1 and the antenna receiving PRS resource #2. If a differential scheme is not used, errors may occur between the positioning results obtained using PRS resource #1 and the positioning results obtained using PRS resource #2 due to different reception initial phase errors. Even if a differential scheme is used, using a pair of phase measurements obtained through PRS resource #1 and PRS resource #2 to eliminate the reception initial phase error may not be desirable because the influence of the reception initial phase error is not completely canceled out.

[0204] FIG. 15 is a diagram for explaining the phase error of DL PRS transmitted at different times.

[0205] 15, DL PRSs are transmitted from the same base station (TRP / TP) at multiple timings and received by a receiving end. At this time, different initial phase errors may occur at the time (t1) when PRS resource #1 is received and the time (t2) when PRS resource #2 is received. This means that different initial phase errors occur in the phase measurement of PRS resource #1 and the phase measurement of PRS resource #2, and it may not be appropriate to apply the differential method using these as a pair.

[0206] Taking such a situation into consideration, we propose an advantageous method for attenuating / cancelling the effect of initial phase errors in transmission / reception when a terminal performs phase measurements for a specific frequency index (e.g., carrier frequency) based on the received DL PRS and reports RSPD measurements based on this.

[0207] In the following description, RSPD (reference signal carrier phase difference) may also be referred to as RSCPD (reference signal carrier phase difference).

[0208] Although the proposed method is described below based on the 3GPP NR system and mainly on the CPM-based positioning method, it is not limited thereto and can be applied to other positioning methods that can determine positioning by estimating the distance and direction between the transmitter and the terminal. Therefore, the proposed method can be applied to all kinds of transmission and reception methods and positioning methods expected by the base station and the terminal.

[0209] For convenience, the proposed method is described based on the 3GPP NR system, focusing on a method of performing phase measurement based on the carrier frequency of the DL PRS and thereby deriving RSPD measurement. However, the present invention is not limited to this and can be generally applied to any type of reference signal that can be used for positioning (e.g., CSI-RS, DMRS, SSB, UL SRS, etc.), methods for measuring the same, and cases in which a base station or terminal reports on the same.

[0210] For convenience, it is assumed that the transmitter is a base station and the receiver is a terminal, and in this case, taking into consideration a structure in which the terminal receives a PRS transmitted from the base station, the proposed method will be described based on an operation of measuring a phase value using the PRS received by the terminal and reporting the measured phase measurement result to an upper node (e.g., an LMF or a base station). However, the proposed method can also be applied to a case in which the transmitter is a terminal and the receiver is a base station, or a case in which both the transmitter and the receiver are terminals (or both are base stations), and can also be applied to a case in which the reference signal used for transmission, reception, and phase measurement is an SRS or SL PRS.

[0211] The methods proposed in this specification may be implemented in an independent form without being particularly combined, or may be implemented in a linked form by combining one or more methods. Some terms, symbols, sequences, etc. used may be replaced with other terms, symbols, sequences, etc.

[0212] To support the CPP positioning method, we propose a measurement and reporting method that takes into account the characteristics of the initial phase error when a terminal performs RSPD measurement and reports it.

[0213] [Proposal 1] RSPD measurement reporting considering different initial transmission phase errors between PRS resources

[0214] When a terminal performs phase measurement for a DL PRS transmitted and received in a TRP, calculates an RSPD measurement based on the measurement, and reports the result to an upper node (e.g., a base station or an LMF), the terminal determines the pair of PRS resources to be used for the RSPD measurement, taking into account the difference in initial phase error between different DL PRS resources, and proposes the associated operations of the upper node and the terminal.

[0215] When using RSPD measurement for positioning, the UE may need to perform RSPD measurement on multiple TRPs at different locations and report the measurement results as necessary. In this case, at least one reference TRP (i.e., a reference TRP) may be set / selected, and the RSPD measurement may be calculated based on the phase measurement of the PRS resource transmitted / received from the reference TRP to the UE. If there is a difference in initial phase error between the PRS resources transmitted / received from the reference TRP to the UE, the impact of the initial phase error may vary depending on the PRS resource selected by the UE, which may cause errors in the positioning results. For example, if each TRP supports signal / channel transmission / reception using multiple antennas and different PRS resources are transmitted for each antenna or antenna element group (or panel), different initial phase errors may occur between the transmitted different PRS resources.

[0216] For example, in the case of UE-assisted positioning (i.e., a method in which the UE reports measurement results and the LMF calculates positioning) using a differential method to remove transmission initial phase errors, the LMF may require information about the PRS resources used by the UE for RSPD measurement to consider the influence of different initial phase errors. Furthermore, from the UE's perspective, in the case of UE-assisted positioning, signaling and reporting may be required to select PRS resources that are advantageous for positioning using the LMF or for performing UE-based positioning (i.e., a method in which the UE directly uses measurement results to perform positioning). In particular, based on the Rel-17 standard, the current standard does not define a method for providing or supporting information about the PRS resources of the reference TRP used by the UE for each positioning measurement when different PRS resources are selected on the reference TRP to perform positioning measurements. Therefore, a new method needs to be introduced to improve positioning performance.

[0217] Taking this into consideration, the following example proposes criteria for selecting PRS resources of a reference TRP that a terminal uses to calculate RSPD measurements, and related signaling and reporting methods. One or more of the following methods can be used in combination.

[0218] [Proposal 1-1] Reporting the PRS resource ID of the reference TRP used in RSPD measurements

[0219] As a specific example of Proposal 1, a method is used in which a UE selects a PRS resource to be used as a reference when calculating an RSPD measurement and reports ID information related to the PRS resource together with the RSPD measurement. In this case, the PRS resource to be used as the reference may be selected from the range of PRS resources transmitted and received from the TRP selected as the reference TRP, and may be a PRS resource ID (e.g., NR-DL-PRS-ResourceID defined in TS 37.755) set to the same TRP ID (e.g., dl-PRS-ID defined in TS 37.355).

[0220] As a specific example of Proposal 1-1, the UE may determine one of the PRS resources belonging to the determined reference TRP as a common reference PRS resource of the reference TRP. In this case, the UE may perform multiple RSPD measurements based on the common reference PRS resource of the reference TRP and perform positioning based on the measurements (e.g., UE-based positioning) or report the results to an upper node (e.g., UE-assisted positioning). When the UE reports RSPD measurement results to an upper node, such as in UE-assisted positioning, the UE may apply the same common reference PRS resource of the reference TRP to all RSPD measurements included in a single measurement report, and may report information about the PRS resource ID used as the common reference together with information about the reference TRP. The upper node receiving this can check the PRS resource ID information used as a common reference for all RSPD measurements included in a single measurement report based on the common reference PRS resource information of the reference TRP reported by the UE, and perform positioning using it. This method of using a common reference PRS resource has the advantage of relatively reducing the signaling overhead related to the reference PRS resource, since only the reference PRS resource ID information commonly used for all RSPD measurements is reported.

[0221] As another specific example of Proposal 1-1, the UE may use a different PRS resource as the reference PRS resource for each RSPD measurement, and the selected PRS resource may be determined from among the PRS resources belonging to the same reference TRP. This means that the UE is allowed to select a reference PRS resource from among the PRS resources having the same TRP ID, and is not necessarily required to use a different PRS resource unless there is a special instruction or condition. In this case, the UE selects one of the PRS resources transmitted from the reference TRP for each RSPD measurement, determines it as the reference PRS resource, and performs the measurement. Based on this, the UE may perform positioning (e.g., UE-based positioning) or report it to an upper node (e.g., UE-assisted positioning). When a terminal reports RSPD measurement results to an upper node, such as in UE-assisted positioning, the terminal can select and apply one of the same or different reference PRS resources to each RSPD measurement included in a single measurement report. In this case, the terminal can associate and report information about the PRS resource ID used as the reference with each RSPD measurement. The upper node receiving this information can confirm the information about the PRS resource ID used as the reference in each RSPD measurement included in a single measurement report based on the information about the reference PRS resource ID associated with each RSPD measurement reported by the terminal, and perform positioning using the information. In this way, the method of allowing selection of a reference PRS resource for each RSPD measurement has the effect of providing flexibility in determining and using a reference PRS resource appropriate for the PRS resource configuration situation by allowing the terminal to select an available (or appropriate) PRS resource based on the time when the phase measurement is performed.

[0222] The above specific examples can be combined. For example, a terminal performing UE-assisted positioning may determine a common reference PRS resource of a reference TRP and report the information thereof. For RSPD measurements for which no additional information is provided, the common reference PRS resource of the reference TRP may be configured to be applied. For some RSPD measurements, a reference PRS resource other than the common reference PRS resource of the reference TRP may be applied, and information on the PRS resource ID used as the reference for this RSPD measurement may be reported. In this case, if another reference PRS resource ID reported in connection with the received RSPD measurement is applied, the upper node may use it to interpret the corresponding RSPD measurement, and for other RSPD measurements, it may apply information on the common reference PRS resource of the reference TRP to interpret the corresponding RSPD measurement information.

[0223] To this end, the upper node can provide the UE with recommendation information regarding PRS resources to be used as references through assistance information. The recommendation information can be provided per TRP, per PRS resource set, and / or per PRS resource. The UE can determine a reference PRS resource from among the PRS resources included in the received recommendation information. Alternatively, the UE can select a PRS resource not included in the recommendation information at its own discretion. In this case, if multiple PRS resources are selected as references, the selected PRS resources can be limited to those belonging to the same TRP.

[0224] As a specific example, the terminal can receive assistance data related to a reference PRS resource from a location server (e.g., an LMF) via the LPP and use the assistance data for phase measurement. The terminal can select a reference TRP taking into account the assistance data received from the location server, the radio channel environment, and the like, and determine the reference PRS resource using the PRS resource belonging to the reference TRP. The terminal can perform RSPD measurement using the reference PRS resource and report the selected reference PRS resource ID and RSPD measurement information to the location server via the LPP. The location server can provide assistance data related to the reference PRS resource to the terminal via the LPP. The location server then receives a measurement report transmitted from the terminal and checks the reference PRS resource information included in the received measurement report to obtain information on the reference PRS resource applied to each RSPD measurement and perform positioning based on the information.

[0225] Proposal 1-1 is a method for reducing the impact of TRP transmission initial phase error, which not only provides a beneficial effect in improving the accuracy of CPP-based positioning, but also has the effect of minimizing the increase in additional signaling overhead by utilizing the PRS resource ID defined for existing NR positioning.

[0226] [Proposal 1-2] RSPD target determination and reporting by the transmitting PEG (phase error group)

[0227] As a specific example of Proposal 1, a method can be used in which a transmission PEG (phase error group) of a TRP is set, a PRS resource used by a terminal to calculate an RSPD measurement based on information about the set PEG, and information about the corresponding transmission PEG of the TRP is reported together with the RSPD measurement. In this case, the selection of a PRS resource to be used as a reference can be determined in consideration of the transmission PEG of the TRP within the range of PRS resources transmitted and received in the TRP selected as the reference TRP, and this may be a transmission PEG ID set to the same TRP ID (e.g., dl-PRS-ID defined in the TS 37.355 standard).

[0228] The TRP transmission PEG can be defined as a set of PRS resources that the UE and / or upper node can assume to maintain the same initial phase error of the DL PRS resource transmitted by the TRP at the same time or within a certain period, or as a set of PRS resources that the UE and / or upper node can assume to ensure that the difference in the initial phase error of the DL PRS resource transmitted by the TRP at the same time or within a certain period is guaranteed within a certain margin.

[0229] For example, the transmitting PEG can be distinguished by the transmitting PEG ID, and PRS resources assigned the same transmitting PEG ID and the same TRP ID (and PRS resource set ID) belong to the same transmitting PEG, and the same transmitting PEG cannot be assumed between other PRS resources. As an additional condition, the assumption of the same transmitting PEG may be allowed only between PRS resources configured in the same timing error group (TEG), if configured. When such a method is used, the terminal can report the transmitting PEG ID of the PRS resource used as a reference for RSPD measurement during the measurement reporting process.

[0230] As another example, the upper node may specify one group of PRS resources selectable as reference PRS resources according to the transmit PEG assumption for each TRP (or for a specific TRP) and provide this information to the terminal. As an additional condition, the same transmit PEG assumption may be allowed only between PRS resources configured in the same timing error group (TEG), if configured. When this method is used, the terminal may report whether it took the transmit PEG into consideration when selecting a PRS resource used as a reference for RSPD measurement during the measurement reporting process, or the terminal may be forced to select a PRS resource based on the transmit PEG assumption without a separate report.

[0231] As a specific example of Proposal 1-2, the UE can determine a common reference transmission PEG for the reference TRP within one transmission PEG based on the determined reference TRP, and determine and use an appropriate PRS resource from among them. If multiple transmission PEGs are configured for one TRP, the UE can report the transmission PEG ID information of the transmission PEG determined as the common reference transmission PEG for the reference TRP. If a single transmission PEG is configured, a separate report is not required. In this case, the UE can select a PRS resource to be used as a reference for each RSPD measurement from the range of PRS resources included in the common reference transmission PEG for the reference TRP, and can perform positioning based on this (e.g., UE-based positioning) or report it to an upper node (e.g., UE-assisted positioning). When a terminal reports RSPD measurement results to an upper node, such as in UE-assisted positioning, the terminal can apply a common reference transmission PEG of the same reference TRP to all RSPD measurements included in a single measurement report, and in this case, information on the transmission PEG used as the common reference (i.e., whether or not reference PRS resource selection taking into account the transmission PEG ID or the transmission PEG is applied) can be reported together with the reference TRP information as needed. Upon receiving this, the upper node can confirm the transmission PEG ID used as the common reference for all RSPD measurements included in a single measurement report based on the information on the common reference transmission PEG of the reference TRP reported by the terminal, and perform positioning using it.

[0232] As another specific example of Proposal 1-2, the UE may use different transmission PEGs as reference PRS resources for each RSPD measurement, and the selected PRS resources may be determined from among the PRS resources belonging to the same reference TRP. This means that the UE is allowed to select a reference PRS resource from within the range of PRS resources having the same TRP ID, and does not necessarily require the use of different PRS resources unless otherwise specified. In this case, the UE selects one of the PRS resources transmitted from the reference TRP for each RSPD measurement, determines it as the reference PRS resource, performs the measurement, and can perform positioning based on the result and the transmitted PEG information (e.g., UE-based positioning) or report it to an upper node (e.g., UE-assisted positioning). When a terminal reports RSPD measurement results to an upper node, such as in UE-assisted positioning, the terminal may select and apply one of the same or different reference PRS resources for each RSPD measurement included in a single measurement report. The selected reference PRS resources may also have different transmission PEGs. In this case, the transmission PEG ID information of the PRS resource used as the reference may also be reported as information related to each RSPD measurement. Upon receiving this, the upper node may check the transmission PEG ID information used as the reference for each RSPD measurement included in a single measurement report based on the reference transmission PEG ID information related to each RSPD measurement reported by the terminal, and perform positioning using the information. This method of allowing selection of a reference PRS resource for each RSPD measurement allows the terminal to select an available (or appropriate) PRS resource based on the time when the phase measurement was performed, thereby providing flexibility in determining and using a reference PRS resource appropriate for the PRS resource configuration situation.

[0233] The above specific examples can be combined. For example, a terminal performing UE-assisted positioning may determine a common reference transmission PEG for the reference TRP and report the information thereof. For RSPD measurements for which no additional information is provided, the common reference transmission PEG for the reference TRP may be applied. For some RSPD measurements, a reference PRS resource that does not belong to the common reference transmission PEG for the reference TRP may be applied, and for these RSPD measurements, information on the transmission PEG ID used as the reference (or, if only a single transmission PEG is configured and a PRS resource that does not belong to the single transmission PEG exists and is selected, information on the PRS resource ID) may be reported. In this case, if a different reference transmission PEG ID (or a different reference PRS resource ID) reported in connection with the received RSPD measurement is applied, the upper node may use it to interpret the RSPD measurement. For other RSPD measurements, the upper node may apply information on the common reference transmission PEG for the reference TRP to interpret the RSPD measurement information.

[0234] As a result, the upper node can provide the terminal with configuration information of the transmitting PEG configured for each TRP. The configuration information of the transmitting PEG can be provided in units of TRP, PRS resource set, and / or PRS resource. If a transmitting PEG ID is provided, the upper node can assign a transmitting PEG ID for each resource (e.g., TRP, PRS resource set, and / or PRS resource) and provide the information to the terminal. If a single transmitting PEG is assigned to a TRP, the upper node can configure whether each resource (e.g., TRP, PRS resource set, and / or PRS resource) is included in the transmitting PEG and provide the information to the terminal, or a list of PRS resource IDs belonging to the transmitting PEG can be configured and provided to the terminal.

[0235] To this end, the upper node can provide the terminal with recommendation information regarding a transmitting PEG to be used as a reference through assistance information. The terminal can determine a transmitting PEG to be used as a reference from among the transmitting PEGs included in the received recommendation information. Alternatively, the terminal can select a transmitting PEG not included in the recommendation information at its own discretion. In this case, if multiple transmitting PEGs are selected as references, the selection can be limited to the case where all selected PRS resources belong to the same TRP.

[0236] As a specific example, the terminal can receive information related to a transmitting PEG from a location server (e.g., an LMF) through the LPP and use it for phase measurement. The terminal can determine a reference TRP and a transmitting PEG belonging to it by considering the assistance data received from the location server and the radio channel environment. The terminal can perform RSPD measurement using a PRS resource included in the transmitting PEG determined as the reference and report information related to the selected transmitting PEG (e.g., a transmitting PEG ID or whether the transmitting PEG is applied) and information about the RSPD measurement to the location server through the LPP. The location server can provide information related to the transmitting PEG to the terminal through the LPP. Thereafter, the location server receives a measurement report transmitted from the terminal, checks information related to the transmitting PEG included in the received measurement report, obtains information about the transmitting PEG applied to each RSPD measurement, and performs positioning based on the information.

[0237] Proposal 1-2 is a method for reducing the effect of TRP transmission initial phase error, which is beneficial for improving the accuracy of CPP-based positioning, and also provides correlation information between multiple PRS resources with the same transmission TEG, giving flexibility to the terminal's RSPD measurement configuration method.

[0238] [Proposal 1-3] RSPD target determination and reporting based on transmit TEG margin conditions

[0239] As a specific example of Proposal 1, a method can be used in which a UE selects a PRS resource to be used to calculate an RSPD measurement based on information about a transmitting timing error group (TEG), and reports information about the corresponding transmitting TEG of the TRP together with the RSPD measurement. In this case, the selection of a PRS resource to be used as a reference can be determined in consideration of the transmitting TEG of the TRP within the range of PRS resources transmitted and received in the TRP selected as the reference TRP, and this may be a transmitting TEG ID (e.g., dl-prs-trp-Tx-TEG-ID defined in TS 37.355) set to the same TRP ID (e.g., dl-PRS-ID defined in TS 37.355).

[0240] The transmission TEG of the TRP can be defined as a set of PRS resources for which the UE and / or upper node can assume that the timing error of the DL PRS resource transmitted by the TRP at the same time or within a certain interval is guaranteed within a certain range, and the concept of the transmission TEG defined in the Rel-16 NR standard can be reused.

[0241] As a specific example of Proposals 1-3, when multiple PRS resources are used to determine a PRS resource to be used as a reference for RSPD measurement, the selected PRS resource may be allowed only if it belongs to a transmitting TEG whose configured transmit TEG margin value (e.g., TEG-TimingErrorMargin defined in TS 37.355) is set to 0Tc. As a specific example, if a specific PRS resource in a specific transmitting TEG whose transmit TEG margin is set to 0Tc is used as a reference for RSPD measurement in a measurement report for one positioning, other PRS resources belonging to the same transmitting TEG may also be specified to be usable as a reference for RSPD measurement in the same measurement report for positioning. Alternatively, if one of the PRS resources belonging to a transmitting TEG whose transmit TEG margin value is set to a value other than 0Tc is selected as a reference PRS resource for calculating RSPD measurement, all RSPD measurements included in a single measurement report for positioning may be restricted to use only the selected PRS resource as a reference. Alternatively, it is possible to restrict selection of only PRS resources belonging to a transmitting TEG whose transmitting TEG margin is set to 0Tc as reference PRS resources for calculating RSPD measurements.

[0242] As a specific example of Proposals 1-3, the UE can determine a common reference transmission TEG for the reference TRP within one transmission TEG based on the determined reference TRP, and determine and use appropriate PRS resources therein. If multiple transmission TEGs are configured for one TRP, the UE can report information on the transmission TEG ID of the transmission TEG determined as the common reference transmission TEG for the reference TRP. In this case, the UE can select a PRS resource to be used as a reference for each RSPD measurement within the range of PRS resources included in the common reference transmission TEG for the reference TRP, and perform positioning based on this (e.g., UE-based positioning) or report it to an upper node (e.g., UE-assisted positioning). When a terminal reports RSPD measurement results to an upper node, such as in UE-assisted positioning, the terminal can apply a common reference transmission TEG of the same reference TRP to all RSPD measurements included in a single measurement report, and can report information about the transmission TEG used as the common reference (i.e., whether or not reference PRS resource selection taking into account the transmission TEG ID or transmission TEG is applied) along with information about the reference TRP as needed. Upon receiving this, the upper node can check the information about the transmission TEG ID used as the common reference for all RSPD measurements included in a single measurement report based on the information about the common reference transmission TEG of the reference TRP reported by the terminal, and perform positioning using the information.

[0243] As another specific example of Proposals 1-3, the UE may use different transmission TEGs as reference PRS resources for each RSPD measurement, and the selected PRS resources may be determined from among PRS resources belonging to the same reference TRP. This means that the UE is allowed to select a reference PRS resource from within a range of PRS resources having the same TRP ID, and does not necessarily require the use of different PRS resources unless there are special instructions or conditions. In this case, the UE selects one of the PRS resources transmitted from the reference TRP for each RSPD measurement, performs the measurement using the reference PRS resource as a reference, and can perform positioning based on the result and transmission TEG information (e.g., UE-based positioning) or report it to an upper node (e.g., UE-assisted positioning). When a terminal reports RSPD measurement results to an upper node, such as in UE-assisted positioning, the terminal may select and apply one of the reference PRS resources, either the same or different, to each RSPD measurement included in a single measurement report. The transmit TEGs of the selected reference PRS resources may also be different. In this case, the transmit TEG ID information of the PRS resource used as the reference may also be reported as information related to each RSPD measurement. Upon receiving this, the upper node may check the transmit TEG ID information used as the reference in each RSPD measurement included in a single measurement report based on the reference transmit TEG ID information related to each RSPD measurement reported by the terminal, and perform positioning using this information. This method of allowing the terminal to select a reference PRS resource for each RSPD measurement allows the terminal to select an available (or appropriate) PRS resource based on the time when the phase measurement is performed, thereby providing flexibility in determining and using a reference PRS resource appropriate for the PRS resource configuration situation.

[0244] The above specific examples can be combined. For example, a terminal performing UE-assisted positioning may determine a common reference transmission TEG of the reference TRP and report the information. For RSPD measurements for which no additional information is provided, the common reference transmission TEG of the reference TRP may be applied. For some RSPD measurements, a reference PRS resource that does not belong to the common reference transmission TEG of the reference TRP may be applied, and information on the transmission TEG ID used as the reference for these RSPD measurements may be reported. In this case, if a different reference transmission TEG ID (or a different reference PRS resource ID) reported in connection with the received RSPD measurement is applied, the upper node may use it to interpret the corresponding RSPD measurement. For other RSPD measurements, the upper node may apply information on the common reference transmission TEG of the reference TRP to interpret the corresponding RSPD measurement information.

[0245] To this end, the upper node can provide the UE with configuration information of the transmitting TEG configured for each TRP. The configuration information of the transmitting TEG can be provided in units of TRP, PRS resource set, and / or PRS resource. This means that the information can be provided to and used by both UEs performing UE-based positioning and UEs performing UE-assisted positioning. If a transmitting TEG ID is provided, the upper node can assign a transmitting TEG ID to each resource (e.g., TRP, PRS resource set, and / or PRS resource) and provide the information to the UE.

[0246] As a specific example, the terminal may receive information about a transmitting TEG from a location server (e.g., an LMF) through the LPP and use it for phase measurement. The terminal may determine one transmitting TEG that satisfies a specific condition (e.g., a transmitting TEG margin of 0Tc) from among the reference TRPs and the transmitting TEGs belonging to the reference TRPs, taking into account the support data received from the location server and the radio channel environment. The terminal may perform RSPD measurement using PRS resources included in the transmitting TEG determined as the reference, and report information related to the selected transmitting TEG (e.g., a transmitting TEG ID) and information about the RSPD measurement to the location server through the LPP. The location server may provide information related to the transmitting TEG to the terminal through the LPP. The location server then receives the measurement report transmitted from the terminal, checks the information related to the PEG included in the received measurement report, obtains information about the PEG applied to each RSPD measurement, and performs positioning based on the information.

[0247] Proposals 1-3 provide a beneficial effect in improving the accuracy of CPP-based positioning as a method for reducing the impact of TRP transmission initial phase error, and also have the effect of reducing the additional signaling overhead that may occur by reusing the transmission TEG defined for existing NR positioning.

[0248] [Proposal 2] RSPD measurement report considering different initial phase errors between receiving antennas

[0249] When a terminal performs phase measurement for a DL PRS transmitted and received from a TRP, calculates an RSPD measurement based on this, and reports it to an upper node (e.g., a base station or LMF), the phase measurement pair to be used for the RSPD measurement is determined taking into account the difference in the received initial phase error between different phase measurements of the terminal, and the associated operations of the upper node and terminal are proposed.

[0250] When using RSPD measurement for positioning, a terminal may select two PRS resources (i.e., a PRS resource of a reference TRP and a PRS resource of a target TRP) and perform RSPD measurement using the difference between phase measurements measured by each PRS resource. If there is a difference in the reception initial phase error between the two phase measurements, this may cause an error in the positioning result. For example, if a terminal has multiple antennas and two phase measurements are measured through different antennas, the reception initial phase errors generated in the two antennas may be different. Furthermore, even in the case of different phase measurements using the same antenna, if there is a difference in the time points at which the two phase measurements are measured, different reception initial phase errors may occur.

[0251] For example, a differential method can be used to remove the initial receive phase error, which requires that a pair of phase measurements satisfy the condition that the same initial phase error is assumed or guaranteed. The terminal may perform RSPD measurements using a pair of phase measurements that satisfy this condition, or a signaling or reporting method may be required to notify the upper node of whether the same initial receive phase error can be assumed for the phase measurements used in the RSPD measurements. Based on the Rel-17NR standard, the current standard does not support the definition of phase measurements measured by the terminal or a method that takes into account the impact of the initial receive phase error on this. Therefore, a new method must be introduced to improve positioning performance to a precise level.

[0252] In consideration of this, the following proposes criteria for selecting a phase measurement to be used by a terminal to calculate RSPD measurements and related signaling and reporting methods. Specific methods can be any one of the following methods or a combination of two or more methods.

[0253] [Proposal 2-1] RSPD target determination and reporting by receiving PEG

[0254] As a specific example of Proposal 2, a terminal reports the receiving PEG configuration information and related capability information to an upper node, and also reflects this in RSPD measurements to determine the method of receiving and measuring PRS resources, and reports the RSPD measurements and related information based on this.

[0255] The UE reception PEG can be defined as a set of PRS resources for which the UE and / or upper node can assume that the reception initial phase error that may occur in phase measurement for DL ​​PRS resources received by the UE at the same time or within a certain period is maintained the same, or as a set of PRS resources for which the UE and / or upper node can assume that the difference in reception initial phase error that may occur in phase measurement for DL ​​PRS resources received by the UE at the same time or within a certain period is guaranteed within a certain margin.

[0256] A receive PEG can refer to a group of phase measurements that are assumed to have the same receive initial phase error within the same time point (or interval) or that the difference in receive initial phase error occurs within a certain margin. This can be intended to consider the characteristics of the receive initial phase error caused by the antenna characteristics of the terminal, and each receive PEG is assigned a receive PEG ID so that they can be used separately. Furthermore, a receive PEG margin value can be set for each receive PEG, which can be used to represent the range of receive initial phase error that can occur between phase measurements belonging to the same PEG.

[0257] When a terminal performs a measurement report for positioning including an RSPD measurement, the terminal may report the receiving PEG ID used in the RSPD measurement. The receiving PEG ID to be reported may include both the receiving PEG ID corresponding to the phase measurement used as a reference in calculating the RSPD measurement and the receiving PEG ID corresponding to the phase measurement used as a target. In special cases, for example, when a pair of phase measurements having the same receiving PEG ID is used in calculating the RSPD measurement, it may be permitted to omit reporting the receiving PEG ID for the RSPD measurement. This may be intended to provide PEG information to an upper node so that the upper node can utilize it for positioning.

[0258] Alternatively, the terminal may select only pairs of phase measurements for which the same receiving PEG can be assumed to calculate the RSPD measurement, which may be intended to exclude cases in which an initial phase error that exceeds the receiving PEG margin occurs in the RSPD measurement.

[0259] To this end, the terminal can report information related to the received PEG to the upper node. For example, the information related to the received PEG includes the received PEG ID and the corresponding size of the received PEG margin, and / or the number of PEGs used by the terminal. In addition, the upper node can determine recommendation information for the terminal's operation related to the received PEG and provide it to the terminal. For example, the recommendation information is in the form of assistance data and includes the number of PEGs and the size of the received PEG margin.

[0260] As a specific example, the terminal can receive information related to the received PEG from a location server (e.g., LMF) via LPP and use it for phase measurement. The terminal can obtain a phase measurement of the PEG having a specific received PEG margin by taking into account the assistance data received from the location server and the radio channel environment, and use this to calculate an RSPD measurement. The terminal can then report the calculated RSPD measurement and information related to the PEG to the location server via LPP. The location server can provide information related to the received PEG to the terminal via LPP. The location server can then receive the measurement report sent by the terminal and check the information related to the received PEG included in the received measurement report to obtain information on the received PEG applied to each RSPD measurement, and perform positioning based on the information.

[0261] Proposal 2-1 provides a structure that is advantageous for configuring RSPD measurements that offset / reduce the effects of terminal reception initial phase errors, and also has the effect of providing information that the entity that ultimately performs positioning (e.g., LMF or terminal) can use to improve positioning accuracy.

[0262] [Proposal 2-2] RSPD target determination and reporting based on receiving TEG margin conditions

[0263] As a specific example of Proposal 2, a terminal can report the configuration information of the receiving TEG and its related capability information to an upper node, and reflect this in RSPD measurements to determine the method of receiving and measuring PRS resources, and then report the RSPD measurements and related information based on this.

[0264] The reception TEG of the terminal can be defined as a set of phase measurements that the terminal and / or upper node can assume are guaranteed to have within a certain range the timing error that may occur in the phase measurements acquired for the DL PRS resources received by the terminal at the same time or within a certain interval, and the concept of reception TEG defined in the Rel-16 NR standard can be reused.

[0265] As a specific example of Proposal 2-2, when selecting a pair of phase measurements to be used to calculate an RSPD measurement, only phase measurements with the same receiving TEG ID (e.g., nr-UE-Rx-TEG-ID defined in the TS 37.355 standard) may be permitted. As a specific example, if information on the receiving TEG ID of a phase measurement used as a reference is included and reported in a measurement report for positioning, the same receiving TEG ID is applied to all phase measurements used to calculate an RSPD measurement included in the measurement report for positioning. Alternatively, if information on the receiving TEG ID of a phase measurement used as a reference is included and reported in a measurement report for positioning, and a different receiving TEG ID is allowed for a specific RSPD measurement, the UE may also report information on the receiving TEG ID of a target phase measurement for the corresponding RSPD measurement. Alternatively, information on the receiving TEG ID of the target phase measurement may be reported corresponding to each RSPD measurement, and in this case, the base station and UE may calculate the RSPD measurement assuming that the receiving TEG of the phase measurement used as a reference is the same.

[0266] To this end, the terminal may report information related to the receiving TEG to the upper node. For example, the information related to the receiving TEG may include a receiving TEG ID and the corresponding size of the receiving TEG margin, and / or the number of TEGs used by the terminal. The upper node may also determine and provide recommendation information for operations related to the receiving TEG of the terminal to the terminal. For example, the recommendation information may be in the form of assistance data, and may include the number of receiving TEGs and the size of the receiving PEG margin.

[0267] As a specific example, the terminal may receive assistance data information related to the reception TEG from a location server (e.g., an LMF) through the LPP and use it for phase measurement. The terminal may acquire a pair of phase measurements having the same specific reception TEG by considering the assistance data received from the location server and the radio channel environment, and may use the acquired pair to calculate an RSPD measurement. The terminal may then report the calculated RSPD measurement and information related to the TEG to the location server through the LPP. The location server may provide information related to the reception TEG to the terminal through the LPP. The location server may then receive a measurement report transmitted from the terminal, check information related to the reception TEG included in the received measurement report, acquire information on the reception TEG applied to each RSPD measurement, and perform positioning based on the acquired information.

[0268] Proposal 2-2 reuses the structure of the receiving TEG defined in existing NR positioning and utilizes it to control the receiving phase error, which has the effect of reducing the increase in signaling overhead that may occur.

[0269] [Proposal 3] Definition of DL RSPD measurement

[0270] To support positioning using CPP, we define RSPD measurements that terminals can report and propose related operations for base stations and terminals.

[0271] The DL RSPD measurement can be defined as the phase difference between (at least) a pair of phase measurements measured by the UE based on DL PRS resources received at a specific time point or within a certain time interval. In this case, the phase measurements used may use PRS resources belonging to different TRPs (e.g., having different TRP IDs). Regarding the PRS resources used to obtain the phase measurement, one PRS resource may be selected / configured for each TRP, or multiple PRS resources satisfying specific conditions may be used. The specific conditions include a condition for a PRS resource that can be received at the same time point or within a period where phase continuity is guaranteed between PRS resources (e.g., a period where the influence of a phase error, such as an initial phase error, is maintained at the same time or within a certain range), and / or a condition for a PRS resource where the same transmit initial phase error can be assumed. In this case, the phase measurement of the PRS resource must be performed so that the same receive initial phase error is guaranteed. Specific conditions where the same transmit initial phase error can be assumed include the transmit PEG condition or the transmit TEG condition with a 0Tc margin proposed in this specification. As specific conditions under which the same reception initial phase error can be assumed, the reception PEG conditions or reception TEG conditions proposed in this specification are used.

[0272] The time condition (i.e., a specific time point or a certain time interval) required for performing the DL RSPD measurement may be determined based on a specific TRP among TRPs having a PRS resource that is a target of the DL RSPD measurement. As a specific example, a time point at which a phase measurement is performed for a PRS resource transmitted from a specific TRP (the TRP that determines the reference time point for the RSPD measurement) may be determined / set as a reference time point. In this case, the time point at which the phase measurement is performed for a PRS resource transmitted from another TRP paired with the specific TRP may be limited to the same time point as the reference time point, or may be set as a time interval within a range that satisfies a specific condition based on the reference time point. In this case, the specific condition may be determined based on a condition that the reception phase continuity of the UE is maintained (e.g., it can be assumed that the reception initial phase error is maintained or varies only within a specific margin), and may be determined by the UE according to its own capabilities or circumstances, or may be information set by an upper node (e.g., a base station or an LMF) and instructed or recommended to the UE.

[0273] For example, to satisfy the phase continuity condition, the target RS must be transmitted and received through a single RF chain. For example, in relation to Rx-Tx time difference measurement, a terminal can aggregate positioning frequency layers (PFLs), but all target PFLs must be transmitted through a single transmit chain and the same antenna reference point of the TRP. In relation to Rx-Tx time difference measurement, a TRP can aggregate PFLs, but all target PFLs must be transmitted through a single transmit chain and the same antenna reference point of the terminal. In relation to RSTD measurement, a terminal can aggregate PFLs, but all target PFLs must be transmitted through a common RF component or common RF bandwidth of the TRP and the same antenna reference point.

[0274] Meanwhile, maintaining phase continuity in the terminal may be related to coverage enhancement (CE). For example, while phase continuity needs to be maintained within a time window related to CE, maintaining phase continuity may end altogether based on the occurrence of a specific event. The specific event may include at least one of: i) a DL slot / reception monitoring event related to TDD; ii) an event in which the gap between consecutive UL transmissions exceeds a specific number of symbols or another UL transmission is scheduled; iii) an event in which at least one of repeated UL transmissions is canceled / dropped; iv) an event in which consecutive repeated UL transmissions are associated with different SRS resource sets, different spatial relations, or different power control parameters; v) an UL TA adjustment event; and vi) a frequency hopping event.

[0275] The above events can be related to phase continuity with respect to the UL.

[0276] According to one embodiment, cases where phase continuity cannot be maintained in RSCPD measurements through DL PRS reception may include, but are not limited to, at least one of the following:

[0277] - (TDD related) UL slots or UL transmissions on unpaired spectrum

[0278] - A gap exceeding a threshold between two PRS receptions for RSCPD measurement (e.g., XX symbols, YY slots, ZZ ms, etc.)

[0279] - Between two PRS receptions for RSCPD measurement, other DL receptions are scheduled or DL ​​monitoring is performed.

[0280] - DL frequency hopping or DL ​​BWP switching between two PRS receivers for RSCPD measurement

[0281] Proposal 3 defines the operations of the terminal, base station, and LMF to minimize the influence of phase errors that may occur when performing CPP on RSPD measurements, thereby achieving advantageous effects in ensuring high positioning accuracy of CPP.

[0282] 16 is a diagram illustrating procedures related to RSCPD for positioning in a wireless communication system according to one embodiment. The network may include one or more base stations / TRPs.

[0283] Referring to FIG. 16, the terminal may receive at least one RRC signaling from the network. The RRC signaling may include configuration related to positioning. The configuration related to positioning may include, for example, at least one of i) DL PRS resource (set) configuration, ii) measurement configuration for positioning, and iii) measurement report configuration. The ii) measurement configuration for positioning may include configuration for CPM measurement for DL ​​PRS. The iii) measurement report configuration may include configuration related to RSCPD reporting calculated based on CPM. At least one of the ii) measurement configuration for positioning and iii) measurement report configuration may include information related to determining DL Rx phase continuity of the terminal.

[0284] The network can transmit the DL PRS at each time point based on i) the DL PRS resource (set) configuration (A10, A11, A13).

[0285] The terminal can measure the carrier phase for the DL PRS (A15, A16, A17) based on the measurement configuration for positioning, and calculate at least one RSCPD value based on the carrier phase (A20).

[0286] The terminal may transmit a measurement report including at least one RSCPD value based on iii) the measurement report configuration (A25).

[0287] The RSCPD value can be calculated based on the difference in phase measurements between a pair of points in time, and the pair of points in time for calculating the RSCPD value can be points included in a time window in which DL Rx phase continuity of the terminal is maintained.

[0288] 16, it is assumed that CPM(A15) and CPM(A16) belong to the same Phase Continuity time window #1, and CPM(A16) belongs to Phase Continuity time window #2. Therefore, the UE can calculate the RSCPD value based on the difference between CPM(A15) and CPM(A16). On the other hand, the UE can be defined / configured not to calculate the RSCPD value between CPM(A16) and CPM(A15) (or CPM(A16)) measured in different Phase Continuity time windows.

[0289] FIG. 17 is a diagram illustrating a flow of a measurement report transmission method according to an embodiment.

[0290] Referring to FIG. 17, the terminal may measure a carrier phase for a reference signal for positioning at each of a plurality of time points (B05).

[0291] The terminal may determine at least one reference signal carrier phase difference (RSCPD) value based on the carrier phase measurement (B10).

[0292] The terminal may transmit a measurement report related to the positioning including the at least one RSCPD value (B15).

[0293] Each of the at least one RSCPD value may be determined based on a time point at which phase continuity of the terminal is maintained among the plurality of time points at which the carrier phase is measured.

[0294] The terminal may determine that the phase continuity is maintained for a time period in which a change in an initial phase error is less than a threshold.

[0295] The time point at which the phase continuity is maintained may include a reference time point.

[0296] Each RSCPD value can be determined based on the difference between the phase measurement value at the reference time point and the phase measurement value at another time point paired with the reference time point.

[0297] The reference time point may be a time point at which the reference signal for positioning is received from a reference TRP (transmission reception point) among one or more TRPs that transmit the reference signal for positioning.

[0298] The number of symbols included in the time gap between the reference time point and the other time point may be equal to or less than a specific number.

[0299] The terminal may determine that the phase continuity is not maintained based on at least one of (i) uplink transmission for a single spectrum (unpaired spectrum), (ii) downlink reception scheduling or downlink monitoring occurring between two points in time for phase measurement, and (iii) downlink frequency hopping or downlink bandwidth part switching occurring between two points in time for phase measurement.

[0300] The measurement report may include an identification of a reference reference signal resource associated with the at least one RSCPD value.

[0301] The reference signal resource may be the same for all of the at least one RSCPD value.

[0302] FIG. 18 is a diagram illustrating a flow of a method in which a device including at least one TRP (transmission and reception point) receives a measurement report from a terminal according to one embodiment.

[0303] Referring to FIG. 18, a device including at least one TRP can transmit a reference signal for positioning at multiple points in time (C05).

[0304] The device including at least one TRP can receive from the terminal a measurement report related to a carrier phase of the reference signal for positioning measured at each of the plurality of time points (C10), wherein the measurement report can include at least one reference signal carrier phase difference (RSCPD) value.

[0305] Each of the at least one RSCPD value may be determined based on a time point at which phase continuity of the terminal is maintained among the plurality of time points at which the carrier phase is measured.

[0306] The phase continuity can be maintained for a time period in which a change in an initial phase error is less than a threshold value.

[0307] The time point at which the phase continuity is maintained may include a reference time point.

[0308] Each RSCPD value may be the difference between a phase measurement value at the reference time point and a phase measurement value at another time point paired with the reference time point.

[0309] The reference time point may be a time point related to the time point at which the reference signal for positioning is transmitted from a reference TRP (transmission reception point) among one or more TRPs that transmit the reference signal for positioning.

[0310] The number of symbols included in the time gap between the reference time point and the other time point may be equal to or less than a specific number.

[0311] The phase continuity may not be maintained in the event of (i) uplink transmission on a single spectrum (unpaired spectrum), (ii) downlink reception scheduling or downlink monitoring occurring between the two points in time for phase measurement, and (iii) downlink frequency hopping or downlink bandwidth part switching occurring between the two points in time for phase measurement.

[0312] The measurement report may include an identification of a reference reference signal resource associated with the at least one RSCPD value.

[0313] The reference signal resource may be the same for all of the at least one RSCPD value.

[0314] FIG. 19 is a diagram illustrating a communication system 1 to which the present invention is applied.

[0315] Referring to FIG. 19, a communication system 1 applicable to the present invention includes wireless devices, base stations, and a network. Here, the wireless devices refer to devices that communicate using wireless connection technologies (e.g., 5G NR, LTE), and are also referred to as communication / wireless / 5G devices. The wireless devices include, but are not limited to, a robot 100a, vehicles 100b-1 and 100b-2, an XR (eXtended Reality) device 100c, a handheld device 100d, a home appliance 100e, an IoT (Internet of Things) device 100f, and an AI server / device 400. For example, the vehicles include vehicles equipped with wireless communication capabilities, autonomous vehicles, vehicles capable of vehicle-to-vehicle communication, and the like. Here, the vehicles include unmanned aerial vehicles (UAVs) (e.g., drones). XR devices include Augmented Reality (AR), Virtual Reality (VR), and Mixed Reality (MR) devices, and are embodied in the form of Head-Mounted Devices (HMDs), Head-Up Displays (HUDs) mounted on vehicles, TVs, smartphones, computers, wearable devices, home appliances, digital billboards, vehicles, robots, etc. Mobile devices include smartphones, smart pads, wearable devices (e.g., smart watches, smart glasses), computers (e.g., laptops, etc.), etc. Home appliances include TVs, refrigerators, washing machines, etc. IoT devices include sensors, smart meters, etc. For example, base stations and networks may also be embodied as wireless devices, and a specific wireless device 200a may operate as a base station / network node for other wireless devices.

[0316] The wireless devices 100a to 100f are connected to a network 300 via a base station 200. Artificial Intelligence (AI) technology is applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f are connected to an AI server 400 via the network 300. The network 300 is configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. The wireless devices 100a to 100f can communicate with each other via the base station 200 / network 300, but can also communicate directly without going through the base station / network (e.g., sidelink communication). For example, vehicles 100b-1 and 100b-2 can communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to Everything) communication). IoT devices (e.g., sensors) can also communicate directly with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0317] Wireless communication / connections 150a, 150b, and 150c are performed between the wireless devices 100a to 100f and the base stations 200, and between the base stations 200. Here, the wireless communication / connections are performed using various wireless connection technologies such as uplink / downlink communication 150a and sidelink communication 150b (or D2D communication), and communication between base stations 150c (e.g., relay, Integrated Access Backhaul (IAB)) (e.g., 5G NR). Through the wireless communication / connections 150a, 150b, and 150c, the wireless devices and the base stations, and the base stations, can transmit / receive wireless signals to / from each other. For example, the wireless communication / connections 150a, 150b, and 150c can transmit / receive signals via various physical channels. To this end, according to various proposals of the present invention, any one of various configuration information setting processes for transmitting / receiving wireless signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, resource mapping / demapping, etc.), and resource allocation processes is performed.

[0318] FIG. 20 is a diagram illustrating a wireless device to which the present invention can be applied.

[0319] 20, a first wireless device 100 and a second wireless device 200 transmit and receive wireless signals using various wireless access technologies (e.g., LTE, NR), where {first wireless device 100, second wireless device 200} corresponds to {wireless device 100x, base station 200} and / or {wireless device 100x, wireless device 100x} in FIG.

[0320] The first wireless device 100 includes one or more processors 102 and one or more memories 104, and further includes one or more transceivers 106 and / or one or more antennas 108. The processor 102 is configured to control the memory 104 and / or the transceiver 106 to implement the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein. For example, the processor 102 processes information in the memory 104 to generate first information / signals and then transmits a wireless signal including the first information / signals via the transceiver 106. The processor 102 also receives a wireless signal including second information / signals via the transceiver 106 and then stores information obtained from signal processing of the second information / signals in the memory 104. The memory 104 is coupled to the processor 102 and stores various information related to the operation of the processor 102. For example, the memory 104 stores software code including instructions for performing some or all of the processes controlled by the processor 102 or for implementing the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein. Here, the processor 102 and memory 104 are part of a communication modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE, NR). The transceiver 106 is coupled to the processor 102 and transmits and / or receives wireless signals via one or more antennas 108. The transceiver 106 includes a transmitter and / or a receiver. The transceiver 106 may also be referred to as an RF (radio frequency) unit. In one embodiment of the present invention, a wireless device may also refer to a communication modem / circuit / chip.

[0321] The second wireless device 200 includes one or more processors 202 and one or more memories 204, and further includes one or more transceivers 206 and / or one or more antennas 208. The processor 202 is configured to control the memory 204 and / or the transceiver 206 to implement the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein. For example, the processor 202 processes information in the memory 204 to generate third information / signal, and then transmits a wireless signal including the third information / signal via the transceiver 206. The processor 202 also receives a wireless signal including fourth information / signal via the transceiver 206, and then stores information obtained from signal processing of the fourth information / signal in the memory 204. The memory 204 is coupled to the processor 202 and stores various information related to the operation of the processor 202. For example, the memory 204 stores software code including instructions for performing some or all of the processes controlled by the processor 202 or for implementing the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein. Here, the processor 202 and memory 204 are part of a communication modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE, NR). The transceiver 206 is coupled to the processor 202 and transmits and / or receives wireless signals via one or more antennas 208. The transceiver 206 includes a transmitter and / or a receiver. The transceiver 206 may also be referred to as an RF unit. In one embodiment of the present invention, the wireless device may also refer to a communication modem / circuit / chip.

[0322] The hardware elements of the wireless device 100, 200 are described in more detail below. Without limitation, one or more protocol layers may be implemented by one or more processors 102, 202. For example, one or more processors 102, 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). The one or more processors 102, 202 may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) according to the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein. The one or more processors 102, 202 may generate messages, control information, data, or information according to the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein. The one or more processors 102, 202 generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information according to the functions, procedures, suggestions, and / or methods disclosed herein and provide them to the one or more transceivers 106, 206. The one or more processors 102, 202 receive signals (e.g., baseband signals) from the one or more transceivers 106, 206 and obtain the PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein.

[0323] The one or more processors 102, 202 may also be referred to as a controller, microcontroller, microprocessor, or microcomputer. The one or more processors 102, 202 may be implemented using hardware, firmware, software, or a combination thereof. For example, the one or more processors 102, 202 may include 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). The descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein may be implemented using firmware or software, and the firmware or software may be embodied to include modules, procedures, functions, etc. Firmware or software configured to perform the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein may be included in the one or more processors 102, 202 or may be stored in one or more memories 104, 204 and executed by the one or more processors 102, 202. The descriptions, functions, procedures, suggestions, methods and / or flow charts disclosed in this specification may be embodied using firmware or software in the form of code, instructions and / or sets of instructions.

[0324] The one or more memories 104, 204 may be coupled to the one or more processors 102, 202 and may store various types of data, signals, messages, information, programs, code, instructions, and / or instructions. The one or more memories 104, 204 may be comprised of ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer-readable storage media, and / or combinations thereof. The one or more memories 104, 204 may be located internal and / or external to the one or more processors 102, 202. Additionally, the one or more memories 104, 204 may be coupled to the one or more processors 102, 202 via various techniques, such as wired or wireless connections.

[0325] One or more transceivers 106, 206 can transmit user data, control information, wireless signals / channels, etc., as referenced in the methods and / or flowcharts herein to one or more other devices. One or more transceivers 106, 206 can receive user data, control information, wireless signals / channels, etc., as referenced in the descriptions, functions, procedures, suggestions, methods and / or flowcharts herein from one or more other devices. For example, one or more transceivers 106, 206 can be coupled to one or more processors 102, 202 and can transmit and receive wireless signals. For example, one or more processors 102, 202 can control one or more transceivers 106, 206 to transmit user data, control information, or wireless signals to one or more other devices. Also, one or more processors 102, 202 can control one or more transceivers 106, 206 to receive user data, control information, or wireless signals from one or more other devices. Furthermore, one or more transceivers 106, 206 are coupled to one or more antennas 108, 208 and are configured to transmit and receive user data, control information, radio signals / channels, etc., as referred to in the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein via the one or more antennas 108, 208. In this specification, one or more antennas may refer to multiple physical antennas or multiple logical antennas (e.g., antenna ports). The one or more transceivers 106, 206 convert the received user data, control information, radio signals / channels, etc., from RF band signals to baseband signals for processing by one or more processors 102, 202. The one or more transceivers 106, 206 convert the user data, control information, radio signals / channels, etc., processed by one or more processors 102, 202, from baseband signals to RF band signals. For this purpose, the one or more transceivers 106, 206 include (analog) oscillators and / or filters.

[0326] 21 is a diagram showing another example of a wireless device to which the present invention is applied. The wireless device may be implemented in various forms depending on the use case / service (see FIG. 19).

[0327] 21, wireless devices 100, 200 correspond to the wireless devices 100, 200 of FIG. 20 and are composed of various elements, components, units / sections, and / or modules. For example, the wireless devices 100, 200 include a communication unit 110, a control unit 120, a memory unit 130, and an additional element 140. The communication unit includes a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 includes one or more processors 102, 202 and / or one or more memories 104, 204 in FIG. 20. For example, the transceiver 114 includes one or more transceivers 106, 206 and / or one or more antennas 108, 208 in FIG. 20. The control unit 120 is electrically coupled to the communication unit 110, the memory unit 130, and the additional element 140 and controls the overall operation of the wireless device. For example, the control unit 120 controls the electrical / mechanical operations of the wireless device based on the programs / codes / instructions / information stored in the memory unit 130. The control unit 120 also transmits the information stored in the memory unit 130 to the outside (e.g., another communication device) via the communication unit 110 via a wireless / wired interface, or stores information received from the outside (e.g., another communication device) via the communication unit 110 via a wireless / wired interface in the memory unit 130.

[0328] The additional element 140 may be configured in various ways depending on the type of wireless device. For example, the additional element 140 may include any one of a power unit / battery, an input / output unit (I / O unit), a driving unit, and a computer unit. Wireless devices may be embodied in the form of, but are not limited to, a robot (FIG. 20, 100a), a vehicle (FIG. 20, 100b-1, 100b-2), an XR device (FIG. 20, 100c), a mobile device (FIG. 20, 100d), a home appliance (FIG. 20, 100e), an IoT device (FIG. 20, 100f), a digital broadcasting terminal, a hologram device, a public safety device, an MTC device, a medical device, a FinTech device (or financial device), a security device, a climate / environment device, an AI server / device (FIG. 20, 400), a base station (FIG. 20, 200), a network node, etc. Wireless devices may be mobile or fixed depending on the use case / service.

[0329] In FIG. 21, the various elements, components, units / sections and / or modules within the wireless devices 100, 200 are all connected to each other by wired interfaces or at least some are connected wirelessly by a communication section 110. For example, in the wireless devices 100 and 200, the control unit 120 and the communication unit 110 are connected by wire, and the control unit 120 and the first unit (e.g., 130, 140) are connected wirelessly via the communication unit 110. Furthermore, each element, component, unit / section and / or module in the wireless devices 100 and 200 further includes one or more elements. For example, the control unit 120 is configured with a set of one or more processors. For example, the control unit 120 is configured with a set of a communication control processor, an application processor, an ECU (Electronic Control Unit), a graphics processor, a memory control processor, etc. As another example, the memory unit 130 is configured with a RAM (Random Access Memory), a DRAM (Dynamic RAM), a ROM (Read Only Memory), a flash memory, a volatile memory, a non-volatile memory and / or a combination thereof.

[0330] 22 is a diagram illustrating an example of a vehicle or an autonomous vehicle to which the present invention is applied. The vehicle or the autonomous vehicle may be embodied as a mobile robot, a car, a train, an aerial vehicle (AV), a ship, etc.

[0331] 22, a vehicle or autonomous vehicle 100 includes 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 is configured as part of the communication unit 110. Blocks 110 / 130 / 140a to 140d correspond to blocks 110 / 130 / 140 in FIG. 21, respectively.

[0332] The communication unit 110 transmits and receives signals (e.g., data, control signals, etc.) to and from external devices such as other vehicles, base stations (e.g., base stations, roadside units, etc.), and servers. The control unit 120 controls elements of the vehicle or autonomous vehicle 100 to perform various operations. The control unit 120 includes an ECU (Electronic Control Unit). The driving unit 140a causes the vehicle or autonomous vehicle 100 to move on the ground. The driving unit 140a includes an engine, a motor, a powertrain, wheels, brakes, a steering device, etc. The power supply unit 140b supplies power to the vehicle or autonomous vehicle 100 and includes wired / wireless charging circuits, a battery, etc. The sensor unit 140c can obtain vehicle status, surrounding environment information, user information, etc. The sensor unit 140c includes an IMU (inertial measurement unit) sensor, a collision sensor, a wheel sensor, a speed sensor, an inclination sensor, a weight detection sensor, a heading sensor, a position module, a vehicle forward / reverse sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illuminance sensor, a pedal position sensor, etc. The autonomous driving unit 140d implements technology for maintaining a lane while driving, technology for automatically adjusting speed such as adaptive cruise control, technology for automatically driving along a predetermined route, technology for automatically setting a route and driving when a destination is set, etc.

[0333] For example, the communication unit 110 receives map data, traffic information data, etc. from an external server. The autonomous driving unit 140d generates an autonomous driving route and a driving plan based on the obtained data. The control unit 120 controls the driving unit 140a (e.g., adjusting speed / direction) so that the vehicle or autonomous vehicle 100 moves along the autonomous driving route according to the driving plan. The communication unit 110 non-periodically obtains the latest traffic information data from an external server during autonomous driving and also obtains surrounding traffic information data from surrounding vehicles. In addition, the sensor unit 140c obtains vehicle status and surrounding environment information during autonomous driving. The autonomous driving unit 140d updates the autonomous driving route and driving plan based on the newly obtained data / information. The communication unit 110 transmits information regarding the vehicle position, autonomous driving route, driving plan, etc. to an external server. The external server can predict traffic information data using AI technology based on information collected from the vehicle or autonomous vehicle and provide the predicted traffic information data to the vehicle or autonomous vehicle.

[0334] The above-described embodiments are combinations of the elements and features of the present invention in a predetermined form. Each element or feature should be considered optional unless otherwise explicitly stated. Each element or feature may be implemented without being combined with other elements or features. It is also possible to combine some elements and / or features to form an embodiment of the present invention. The order of operations described in the embodiments of the present invention may be changed. Some elements or features of any embodiment may be included in other embodiments, or may be replaced with corresponding elements or features of other embodiments. Claims that are not explicitly cited in the claims may be combined to form an embodiment, or may be included as new claims by amendment after filing.

[0335] It is obvious to those skilled in the art that the present invention can be embodied in other specific forms without departing from the characteristics of the present invention. Therefore, the above detailed description should not be construed as limiting in all respects, but should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention.

[0336] [Industrial Applicability] The present invention can be used in a terminal, a base station or other equipment of a wireless mobile communication system.

[0337] [Claims at the time of international application] [Claim 1] A method for a terminal to transmit a measurement report in a wireless communication system, comprising: measuring a carrier phase for a positioning reference signal at each of a plurality of time points; determining at least one reference signal carrier phase difference (RSCPD) value based on the carrier phase measurement; and transmitting a measurement report related to the positioning including the at least one RSCPD value; 10. A method according to claim 9, wherein each of the at least one RSCPD value is determined based on a time point among the plurality of time points at which the carrier phase is measured, at which phase continuity for the terminal is maintained. [Claim 2] The method of claim 1, wherein the terminal determines that the phase continuity is maintained for a time point that belongs to a time interval in which a change in an initial phase error is less than a threshold. [Claim 3] The time point at which the phase continuity is maintained includes a reference time point, The method of claim 1 , wherein each RSCPD value is determined based on a difference between a phase measurement value at the reference time point and a phase measurement value at another time point paired with the reference time point. [Claim 4] The method according to claim 3, wherein the reference time point is a time point at which the reference signal for positioning is received from a reference TRP (transmission reception point) among one or more TRPs that transmit the reference signal for positioning. [Claim 5] 4. The method of claim 3, wherein the number of symbols included in the time gap between the reference point in time and the other point in time is equal to or less than a predetermined number. [Claim 6] The terminal (i) uplink transmission over unpaired spectrum; (ii) downlink receive scheduling or downlink monitoring occurring between two time points for phase measurement; and 3. The method of claim 1, wherein determining that the phase continuity is not maintained is based on at least one of: downlink frequency hopping or downlink bandwidth part switching occurring between the two points in time for phase measurement. [Claim 7] The method of claim 1 , wherein the measurement report includes an identification of a reference reference signal resource associated with the at least one RSCPD value. [Claim 8] The method of claim 7 , wherein the reference signal resource is the same for all of the at least one RSCPD value. [Claim 9] A processor-readable recording medium having a program recorded thereon for executing the method of claim 1. [Claim 10] A device for wireless communication, a memory for storing instruction words; and a processor that operates by executing the instructions; The operation of the processor is measuring a carrier phase for a positioning reference signal at each of a plurality of time points; determining at least one reference signal carrier phase difference (RSCPD) value based on the carrier phase measurement; and transmitting a measurement report related to the positioning including the at least one RSCPD value; The device, wherein each of the at least one RSCPD value is determined based on a time point among the plurality of time points at which the carrier phase is measured, at which phase continuity of the device is maintained. [Claim 11] further comprising a transceiver; The device of claim 10, wherein the device is a terminal operating in a wireless communication system. [Claim 12] 11. The device of claim 10, wherein the device is a processing device configured to control a terminal operating in a wireless communication system. [Claim 13] In a wireless communication system, a method for receiving a measurement report from a terminal by a device including at least one transmission and reception point (TRP), comprising: Transmitting a reference signal for positioning at multiple points in time; and receiving a measurement report from the terminal relating to a carrier phase of the positioning reference signal measured at each of the plurality of time points; the measurement report includes at least one reference signal carrier phase difference (RSCPD) value; 10. A method according to claim 9, wherein each of the at least one RSCPD value is determined based on a time point among the plurality of time points at which the carrier phase is measured, at which phase continuity for the terminal is maintained. [Claim 14] A processor-readable recording medium having a program recorded thereon for executing the method according to claim 13. [Claim 15] A device comprising at least one TRP (transmission and reception point), at least one memory for storing an instruction word; and at least one processor that operates by executing the instructions; The operation of the at least one processor includes: Transmitting a reference signal for positioning at multiple points in time; and receiving, from a terminal, a measurement report relating to a carrier phase of the positioning reference signal measured at each of the plurality of time points; the measurement report includes at least one reference signal carrier phase difference (RSCPD) value; An apparatus, wherein each of the at least one RSCPD value is determined based on a time point among the plurality of time points at which the carrier phase is measured, at which phase continuity for the terminal is maintained.

Claims

1. A method for a terminal to transmit a measurement report in a wireless communication system, comprising: measuring a carrier phase for a reference signal for positioning at each of a plurality of time points; determining at least one reference signal carrier phase difference (RSCPD) value based on the carrier phase measurement; and transmitting a measurement report related to the positioning including the at least one RSCPD value; 10. A method according to claim 9, wherein each of the at least one RSCPD value is determined based on a time point at which the carrier phase is measured, at which phase continuity for the terminal is maintained.

2. The method of claim 1 , wherein the terminal determines that the phase continuity is maintained for a time point that belongs to a time interval in which a change in an initial phase error is less than a threshold value.

3. The time point at which the phase continuity is maintained includes a reference time point, The method of claim 1 , wherein each RSCPD value is determined based on a difference between a phase measurement value at the reference time point and a phase measurement value at another time point paired with the reference time point.

4. The method of claim 3, wherein the reference time point is a time point at which the reference signal for positioning is received from a reference TRP (transmission reception point) among one or more TRPs that transmit the reference signal for positioning.

5. 4. The method of claim 3, wherein the number of symbols included in the time gap between the reference time point and the other time point is equal to or less than a predetermined number.

6. The terminal (i) uplink transmission over a single spectrum (unpaired spectrum); (ii) Downlink receive scheduling or downlink monitoring occurring between two time points for phase measurement; and 2. The method of claim 1, wherein (iii) determining that the phase continuity is not maintained is based on at least one of downlink frequency hopping or downlink bandwidth part switching occurring between two points in time for phase measurement.

7. The method of claim 1 , wherein the measurement report includes an identification of a reference reference signal resource associated with the at least one RSCPD value.

8. The method of claim 7 , wherein the reference signal resource is the same for all of the at least one RSCPD value.

9. A processor-readable recording medium having a program recorded thereon for executing the method of claim 1.

10. 1. An apparatus for wireless communication, comprising: a memory for storing an instruction word; and a processor that operates by executing the instructions; The operation of the processor is measuring a carrier phase for a reference signal for positioning at each of a plurality of time points; determining at least one reference signal carrier phase difference (RSCPD) value based on the carrier phase measurement; and transmitting a measurement report related to the positioning including the at least one RSCPD value; The device, wherein each of the at least one RSCPD value is determined based on a time point among the plurality of time points at which the carrier phase is measured, at which phase continuity of the device is maintained.

11. further comprising a transceiver; The device of claim 10 , wherein the device is a terminal operating in a wireless communication system.

12. The device of claim 10 , wherein the device is a processing device configured to control a terminal operating in a wireless communication system.

13. 1. A method for receiving a measurement report from a terminal by a device including at least one transmission and reception point (TRP) in a wireless communication system, comprising: Transmitting a reference signal for positioning at multiple points in time; and receiving a measurement report from the terminal relating to a carrier phase of the positioning reference signal measured at each of the plurality of time points; The measurement report includes at least one RSCPD (reference signal carrier phase difference) value; 10. A method according to claim 9, wherein each of the at least one RSCPD value is determined based on a time point at which the carrier phase is measured, at which phase continuity for the terminal is maintained.

14. A processor-readable recording medium having a program recorded thereon for executing the method of claim 13.

15. A device comprising at least one transmission and reception point (TRP), at least one memory for storing an instruction word; and at least one processor that operates by executing the instructions; The operation of the at least one processor includes: Transmitting a reference signal for positioning at multiple points in time; and receiving, from a terminal, a measurement report relating to a carrier phase of the positioning reference signal measured at each of the plurality of time points; The measurement report includes at least one RSCPD (reference signal carrier phase difference) value; An apparatus, wherein each of the at least one RSCPD value is determined based on a time point among the plurality of time points at which the carrier phase is measured, at which phase continuity for the terminal is maintained.

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