Method in which terminal performs measurement in wireless communication system and apparatus therefor

Abstract

A method by which a terminal measures a carrier phase according to various embodiments and an apparatus therefor are disclosed. Disclosed are a method and an apparatus therefor, the method comprising the steps of: receiving positioning setting information from a network; performing measurement based on the positioning setting information; and reporting a measurement result to the network, in which the positioning setting information includes information on a differential resource set including a plurality of PRS resources for removing timing errors in carrier phase measurement, and the measurement result includes a phase difference value measured using two PRS resources having a pairing relationship included in the differential resource set.

Description

Technical Field

[0001] The present disclosure relates to methods and apparatus for performing positioning based on phase information in a wireless communication system. Background Art

[0002] Wireless communication systems are being widely deployed to provide various types of communication services such as voice and data. Generally, wireless communication systems are multiple access systems capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit 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, single carrier frequency division multiple access (SC-FDMA) systems, and multi-carrier frequency division multiple access (MC-FDMA) systems.

[0003] As more and more communication devices require greater communication capacity when sending and receiving signals, there is a need for improved mobile broadband communications relative to traditional radio access technologies. Therefore, communication systems that take into account services / UEs that are sensitive to reliability and latency are being discussed. The next generation of radio access technologies that take into account enhanced mobile broadband communications, massive machine type communications (MTC), and ultra-reliable and low latency communications (URLLC) may be referred to as new radio access technologies (RATs) or new radios (NRs). Summary of the invention

[0004] Technical issues

[0005] An object of the present disclosure is to provide a method and apparatus for enabling a User Equipment (UE) to quickly and easily determine a PRS resource pair suitable for performing differentiation by predefining / preconfiguring paired PRS resources suitable for differentiation.

[0006] Those skilled in the art to which the embodiments pertain will appreciate that objects that can be achieved with the embodiments are not limited to those that have been specifically described above, and the above and other objects will be more clearly understood from the following detailed description.

[0007] Technical Solution

[0008] According to an aspect, a method for measuring a carrier phase by a user equipment (UE) in a wireless communication system may include: receiving positioning configuration information from a network; performing measurement based on the positioning configuration information; and reporting a measurement result to the network. The positioning configuration information may include information about a differential resource set, the differential resource set including a plurality of positioning reference signal (PRS) resources related to eliminating a timing error in carrier phase measurement, and the measurement result may include a phase difference value measured using two PRS resources in a paired relationship included in the differential resource set.

[0009] Alternatively, the measurement result may include a phase difference value between a reference PRS resource determined based on at least one of a reference PRS resource identifier (ID) indicated for a differential resource set, a reference PRS resource set ID, or a reference transmit reception point (TRP) ID, and a paired PRS resource that is in a paired relationship with the reference PRS resource.

[0010] Alternatively, the reference PRS resource and the paired PRS resource are associated with different TRP IDs.

[0011] Alternatively, the reference TRP ID may correspond to a reference TRP ID configured for time difference of arrival (TDoA).

[0012] Alternatively, based on pairing the reference PRS resource with the plurality of PRS resources, the paired PRS resource may be determined as a PRS resource having the best measurement quality among the plurality of PRS resources.

[0013] Alternatively, the measurement information may also include information on the measurement quality of the paired PRS resources.

[0014] Alternatively, the measurement information may further include information on an ID of a paired PRS resource.

[0015] Alternatively, the positioning configuration information may be received via system information.

[0016] Alternatively, based on the positioning configuration not configuring the reference PRS resource, the UE may determine the PRS resource with the highest PRSID in the differential resource set as the reference PRS resource.

[0017] According to another aspect, a UE for measuring a carrier phase in a wireless communication system may include a radio frequency (RF) transceiver and a processor connected to the RF transceiver. The processor may control the RF transceiver to receive positioning configuration information from a network, the positioning configuration information including information about a differential resource set including a plurality of PRS resources related to eliminating a timing error in carrier phase measurement; perform measurement based on the positioning configuration information; and report a measurement result to the network, the measurement result including a phase difference value measured using two PRS resources in a paired relationship included in the differential resource set.

[0018] According to another aspect, a method for receiving measurement information related to measurement of carrier phase by a network from a UE in a wireless communication system may include: sending positioning configuration information to the UE, the positioning configuration information including information about a differential resource set, the differential resource set including multiple PRS resources related to eliminating timing errors in carrier phase measurements; and receiving measurement information from the UE, the measurement information including a phase difference value measured using two PRS resources in a paired relationship included in the differential resource set.

[0019] Beneficial Effects

[0020] Various embodiments may enable a user equipment (UE) to quickly and easily determine a pair of PRS resources suitable for performing differential by predefining / preconfiguring paired PRS resources suitable for differential.

[0021] Alternatively, the network can clearly and quickly predict / identify the PRS resource for which the phase difference included in the measurement information has been measured and reported based on the pairing relationship or the mapping relationship.

[0022] Alternatively, the clock error can be effectively eliminated by performing differentiation based on the paired PRS resources. Alternatively, by effectively eliminating the clock error, the positioning accuracy of the UE based on CPP or CPM can be greatly improved.

[0023] The effects to be achieved by the embodiments are not limited to the contents specifically described above, and those skilled in the art to which the embodiments belong will more clearly understand other effects not mentioned herein based on the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiments of the disclosure and together with the description serve to explain the principle of the disclosure.

[0025] Figure 1 The structure of an LTE system to which the embodiment is applied is illustrated.

[0026] Figure 2 The structure of an NR system to which an embodiment is applicable is illustrated.

[0027] Figure 3 The structure of an NR radio frame to which an embodiment is applicable is illustrated.

[0028] Figure 4 The time slot structure of the NR frame applicable to the implementation mode is illustrated.

[0029] Figure 5 The diagram illustrates physical channels that can be used in an embodiment and a signal transmission method using the physical channels.

[0030] Figure 6 is a diagram illustrating a positioning protocol configuration for positioning a user equipment (UE), to which various embodiments may be applied.

[0031] Figure 7 An exemplary system architecture for measuring the positioning of a UE to which various embodiments may be applied is illustrated.

[0032] Figure 8 An implementation example of a network for UE positioning is illustrated.

[0033] Fig. 9 is a diagram illustrating a protocol layer for supporting LTE Positioning Protocol (LPP) message transmission to which various embodiments may be applied.

[0034] Fig.10 is a diagram illustrating protocol layers for supporting NR Positioning Protocol (NRPPa) Protocol Data Unit (PDU) transmission to which various embodiments may be applied.

[0035] Fig.11 is a diagram illustrating an observed time difference of arrival (OTDOA) positioning method to which various embodiments are applicable.

[0036] Fig.12 is a diagram illustrating a method in which a UE performs a measurement operation related to a carrier phase measurement.

[0037] Fig.13 is a diagram illustrating a method in which a network receives measurement information related to carrier phase measurement from a UE.

[0038] Fig.14 A communication system applied to the present disclosure is illustrated.

[0039] Fig.15 A wireless device suitable for use with the present disclosure is illustrated.

[0040] Fig.16 Another example of a wireless device to which the present disclosure is applied is illustrated. DETAILED DESCRIPTION

[0041] Various embodiments are applicable to various wireless access technologies, such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), and single carrier frequency division multiple access (SC-FDMA).

[0042] Sidelink refers to a communication scheme that establishes a direct link between user equipments (UEs) to directly exchange voice or data between UEs without assistance from a base station (BS). Sidelink is seen as a way to resolve the burden on the BS caused by the rapidly increasing data traffic.

[0043] Vehicle-to-everything (V2X) refers to the communication technology of exchanging information with other vehicles, pedestrians and infrastructure objects through wired / wireless communication. V2X can be divided into four types: vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-network (V2N) and vehicle-to-pedestrian (V2P). V2X communication can be provided through PC5 interface and / or Uu interface.

[0044] As more and more communication devices require greater communication capacity when sending and receiving signals, there is a need for improved mobile broadband communications relative to traditional radio access technologies. Therefore, communication systems that take into account services / UEs that are sensitive to reliability and latency are being discussed. The next generation of radio access technologies that take into account enhanced mobile broadband communications, massive MTC, and ultra-reliable and low-latency communications (URLLC) may be referred to as new radio access technologies (RATs) or new radios (NRs). Even in NRs, V2X communications may be supported.

[0045] The technology described herein 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), single carrier frequency division multiple access (SC-FDMA), etc. CDMA can be implemented as a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented as a radio technology such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rate for GSM Evolution (EDGE). OFDMA can be implemented as a radio technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Evolved UTRA (E-UTRA), etc. IEEE802.16m is an evolution of IEEE 802.16e, providing backward compatibility with IRRR 802.16e-based systems. UTRA is part of Universal Mobile Telecommunications System (UMTS). 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a part of Evolved UMTS (E-UMTS) using Evolved UTRA (E-UTRA). 3GPP LTE adopts OFDMA for downlink (DL) and SC-FDMA for uplink (UL). LTE Advanced (LTE-A) is an evolution of 3GPP LTE.

[0046] 5G NR is the successor technology of LTE-A and is a new clean-state mobile communication system characterized by high performance, low latency and high availability. 5G NR can use all available spectrum resources, including low frequency bands below 1 GHz, mid-frequency bands between 1 GHz and 10 GHz, and high frequency (millimeter) bands of 24 GHz or above.

[0047] For clarity of explanation, LTE-A or 5G NR is mainly described, but the technical spirit of the implementation manner is not limited thereto.

[0048] Figure 1The structure of the LTE system according to the embodiment of the present disclosure is illustrated. This may also be referred to as an Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) or an LTE / LTE-A system.

[0049] Reference Figure 1 , E-UTRAN includes an evolved Node B (eNB) 20 that provides a control plane and a user plane to UE 10. UE 10 may be fixed or mobile, and may also be referred to as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), or a wireless device. eNB 20 is a fixed station that communicates with UE 10, and may also be referred to as a base station (BS), a base transceiver system (BTS), or an access point.

[0050] The eNBs 20 may be connected to each other via an X2 interface. The eNBs 20 are connected to an Evolved Packet Core (EPC) 39 via an S1 interface. More specifically, the eNBs 20 are connected to a Mobility Management Entity (MME) via an S1-MME interface, and to a Serving Gateway (S-GW) via an S1-U interface.

[0051] The EPC 30 includes an MME, an S-GW, and a packet data network gateway (P-GW). The MME has access information or capability information about the UE, which is mainly used for mobility management of the UE. The S-GW is a gateway with the E-UTRAN as an endpoint, and the P-GW is a gateway with a packet data network (PDN) as an endpoint.

[0052] Based on the lowest three layers of the open system interconnection (OSI) reference model known in communication systems, the radio protocol stack between the UE and the network can be divided into layer 1 (L1), layer 2 (L2), and layer 3 (L3). These layers are defined in pairs between the UE and the evolved UTRAN (E-UTRAN) for data transmission via the Uu interface. The physical (PHY) layer at L1 provides information transfer services on physical channels. The radio resource control (RRC) layer at L3 is used to control radio resources between the UE and the network. For this purpose, the RRC layer exchanges RRC messages between the UE and the eNB.

[0053] Figure 2 The structure of the NR system is illustrated.

[0054] Reference Figure 2 , the next generation radio access network (NG-RAN) may include next generation Node Bs (gNBs) and / or eNBs that provide user plane and control plane protocol terminations to the UE. Figure 2In the figure, for example, NG-RAN is shown as including only gNB. gNB and eNB are connected to each other via Xn interface. gNB and eNB are connected to 5G core network (5GC) via NG interface. More specifically, gNB and eNB are connected to access and mobility management function (AMF) via NG-C interface, and to user plane function (UPF) via NG-U interface.

[0055] Figure 3 The radio frame structure in NR to which the embodiments of the present disclosure are applicable is illustrated.

[0056] Reference Figure 3 , a radio frame can be used for UL transmission and DL transmission in NR. The length of a radio frame is 10ms and can be defined by two 5ms half frames. HF may include five 1ms subframes. A subframe may be divided into one or more slots, and the number of slots in a SF may be determined according to a subcarrier spacing (SCS). Each slot may include 12 or 14 OFDM (A) symbols according to a cyclic prefix (CP).

[0057] In the case of normal CP (NCP), each time slot may include 14 symbols, and in the case of extended CP (ECP), each time slot may include 12 symbols. Herein, a symbol may be an OFDM symbol (or CP-OFDM symbol) or an SC-FDMA symbol (or DFT-s-OFDM symbol).

[0058] Table 1 below lists the number of symbols N in each time slot according to the SCS configuration μ in the NCP case. slot symb , the number of time slots per frame N frame,u slot And the number of time slots N in each subframe subframe,u slot .

[0059] [Table 1]

[0060] <![CDATA[SCS(15×2 u )]]> <![CDATA[N slot symb ]]> <![CDATA[N frame,u slot ]]> <![CDATA[N subframe,u slot ]]> 15KHz(u=0) 14 10 1 30KHz(u=1) 14 20 2 60KHz(u=2) 14 40 4 120KHz(u=3) 14 80 8 240KHz(u=4) 14 160 16

[0061] The following Table 2 lists the number of symbols in each time slot, the number of time slots per frame, and the number of time slots in each subframe according to SCS in the ECP case.

[0062] [Table 2]

[0063] <![CDATA[SCS(15×2 u )]]> <![CDATA[N slot symb ]]> <![CDATA[N frame,u slot ]]> <![CDATA[N subframe,u slot ]]> 60KHz(u=2) 12 40 4

[0064] In the NR system, different OFDM(A) parameter sets (e.g., SCS, CP length, etc.) can be configured for multiple cells aggregated for one UE. Therefore, the (absolute time) duration of time resources (e.g., subframes, time slots, or TTIs) (collectively referred to as time units (TUs) for convenience) including the same number of symbols can be configured to be different for the aggregated cells. In NR, various parameter sets or SCSs can be supported to support various 5G services. For example, with an SCS of 15kHz, wide areas in traditional cellular bands can be supported, while with an SCS of 30kHz / 60kHz, dense urban areas, lower latency, and wide carrier bandwidths can be supported. With an SCS of 60kHz or higher, bandwidths greater than 24.25GHz can be supported to overcome phase noise.

[0065] The NR frequency band may be defined by two types of frequency ranges FR1 and FR2. The values ​​in each frequency range may be changed. For example, two types of frequency ranges may be given in Table 3. In the NR system, FR1 may be a "range below 6 GHz" and FR2 may be a "range above 6 GHz" known as millimeter wave (mmW).

[0066] [Table 3]

[0067] Frequency range specification Corresponding frequency range Subcarrier Spacing (SCS) FR1 450MHz–6000MHz 15, 30, 60kHz FR2 24250MHz–52600MHz 60, 120, 240kHz

[0068] As mentioned above, in the NR system, the values ​​in the frequency range can be changed. For example, as listed in Table 4, the range of FR1 can be from 410 MHz to 7125 MHz. That is, FR1 can include frequency bands of 6 GHz (or 5850, 5900, and 5925 MHz) or above. For example, frequency bands of 6 GHz (or 5850, 5900, and 5925 MHz) or above can include unlicensed frequency bands. Unlicensed frequency bands can be used for various purposes, for example, vehicle communications (e.g., autonomous driving).

[0069] [Table 4]

[0070] Frequency range specification Corresponding frequency range Subcarrier Spacing (SCS) FR1 410MHz–7125MHz 15, 30, 60kHz FR2 24250MHz–52600MHz 60, 120, 240kHz

[0071] Figure 4 The time slot structure in the NR frame is illustrated.

[0072] Reference Figure 4 , a time slot includes multiple symbols in the time domain. For example, a time slot may include 14 symbols in the NCP case and 12 symbols in the ECP case. Alternatively, a time slot may include 7 symbols in the NCP case and 6 symbols in the ECP case.

[0073] A carrier includes multiple subcarriers in the frequency domain. An RB can be defined by multiple (e.g., 12) consecutive subcarriers in the frequency domain. A bandwidth part (BWP) can be defined by multiple consecutive (physical) RBs ((P)RBs) in the frequency domain and corresponds to a parameter set (e.g., SCS, CP length, etc.). A carrier can include up to N (e.g., 5) BWPs. Data communication can be performed in an activated BWP. Each element can be referred to as a resource element (RE) in a resource grid, and a complex symbol can be mapped to an RE.

[0074] The radio interface between UEs or the radio interface between UE and the network may include L1, L2 and L3. In various embodiments of the present disclosure, L1 may refer to a PHY layer. For example, L2 may refer to at least one of a MAC layer, an RLC layer, a PDCH layer or an SDAP layer. For example, L3 may refer to an RRC layer.

[0075] Bandwidth Part (BWP)

[0076] In the NR system, each component carrier (CC) can support up to 400MHz. If a UE operating on a wideband CC always utilizes RF operation for all enabled CCs, the battery power consumption of the UE may increase. Alternatively, considering various use cases (e.g., eMBB, URLLC, mMTC, V2X, etc.) operating within a wideband CC, different parameter sets (e.g., subcarrier spacing) may be supported for different frequency bands within a specific CC. Alternatively, the capabilities for maximum bandwidth may be different between UEs. In view of this, the BS may instruct the UE to operate only in part of the bandwidth, rather than in the entire bandwidth of the wideband CC. For simplicity, a partial bandwidth is defined as a bandwidth part (BWP). Here, a BWP may be composed of resource blocks (RBs) that are continuous on the frequency axis and may correspond to a parameter set (e.g., subcarrier spacing, CP length, slot / mini-slot duration).

[0077] The BS may configure multiple BWPs in one CC configured for the UE. For example, a BWP occupying a relatively small frequency domain may be configured in the PDCCH monitoring time slot, and the PDSCH indicated by the PDCCH in the larger BWP may be scheduled. Alternatively, when the UE is concentrated in a specific BWP, some of the UEs may be configured in another BWP to balance the load. Alternatively, considering the frequency domain inter-cell interference elimination between adjacent cells, the spectrum in the middle of the entire bandwidth may be punctured and the two BWPs on both sides may be configured in the same time slot. That is, the BS may configure at least one DL / UL BWP for the UE associated with the broadband CC (through L1 signaling, MAC CE or RRC signaling, etc.), and activate at least one DL / UL BWP among the configured DL / UL BWPs at a specific time. The BS may instruct the UE to switch to another configured DL / UL BWP (through L1 signaling, MAC CE or RRC signaling, etc.). Alternatively, when the timer expires, the UE may switch to a predetermined DL / UL BWP. The activated DL / UL BWP is defined as the activated DL / UL BWP. During the initial access procedure or before establishing an RRC connection, the UE may not be able to receive the DL / UL BWP configuration. The DL / UL BWP assumed by the UE in this situation is defined as the initially activated DL / UL BWP.

[0078] Figure 5 is a diagram illustrating physical channels that can be used in various embodiments and a signal transmission method using the physical channels.

[0079] Reference Figure 5 In step S11, when the power is turned on or when the UE initially enters the cell, the UE performs an initial cell search involving synchronization with the BS. For the initial cell search, the UE receives a synchronization signal block (SSB). The SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH). The UE synchronizes with the BS and acquires information such as a cell identifier (ID) based on the PSS / SSS. The UE can then receive broadcast information from the cell on the PBCH. In addition, during the initial cell search, the UE can also check the downlink channel status by receiving a downlink reference signal (DLRS).

[0080] In step S12, after the initial cell search, the UE may acquire more specific system information by receiving a physical downlink control channel (PDCCH) and receiving a physical downlink shared channel (PDSCH) based on information of the PDCCH.

[0081] Subsequently, in order to complete the connection to the eNB, the UE may perform a random access procedure with the eNB (S13 to S16). In the random access procedure, the UE may transmit a preamble on a physical random access channel (PRACH) (S13), and may receive a random access response (RAR) for the preamble on a PDCCH and a PDSCH associated with the PDCCH (S14). The UE may transmit a physical uplink shared channel (PUSCH) by using scheduling information in the RAR (S15), and perform a contention resolution procedure including reception of a PDCCH signal and a PDSCH signal corresponding to the PDCCH signal (S16).

[0082] In addition to the above-mentioned 4-step random access procedure (4-step RACH procedure or type 1 random access procedure), when the random access procedure is performed in two steps (2-step RACH procedure or type 2 random access procedure), steps S13 and S15 can be performed as a UE sending operation (for example, an operation of sending message A (MsgA) including a PRACH preamble code and / or PUSCH), and steps S14 and S16 can be performed as a BS sending operation (for example, an operation of sending message B (MsgB) including RAR and / or contention resolution information).

[0083] After the above process, in a general UL / DL signal transmission process, the UE may receive a PDCCH and / or a PDSCH from the BS (S17) and transmit a PUSCH and / or a physical uplink control channel (PUCCH) to the BS (S18).

[0084] The control information sent by the UE to the BS is generally called uplink control information (UCI). UCI includes hybrid automatic repeat and request acknowledgement / negative acknowledgement (HARQ-ACK / NACK), scheduling request (SR), channel quality indicator (CQI), precoding matrix index (PMI), rank indicator (RI), etc.

[0085] Typically, UCI is sent periodically on the PUCCH. However, if control information and service data should be sent simultaneously, control information and service data may be sent on the PUSCH. In addition, UCI may be sent aperiodically on the PUSCH when a request / command is received from the network.

[0086] Figure 6 is a diagram illustrating an exemplary positioning protocol configuration for positioning a UE, to which embodiments may be applied.

[0087] Reference Figure 6, LTE Positioning Protocol (LPP) can be used as a point-to-point protocol between a location server (E-SMLC and / or SLP and / or LMF) and a target device (UE and / or SET) for positioning the target device using location-related measurements obtained from one or more reference resources. The target device and the location server can exchange measurements and / or location information based on signal A and / or signal B on the LPP.

[0088] NRPPa may be used for information exchange between a reference source (access node and / or BS and / or TP and / or NG-RAN node) and a location server.

[0089] The NRPPa protocol can provide the following functions.

[0090] - E-CID position information transfer. This function allows the reference source to exchange position information with the LMF for the purpose of E-CID positioning.

[0091] -OTDOA information transfer. This function allows the reference source to exchange information with the LMF for the purpose of OTDOA positioning.

[0092] - General error condition reporting. This feature allows reporting of general error conditions for which no function specific error messages are defined.

[0093] PRS (Positioning Reference Signal)

[0094] For such positioning, a Positioning Reference Signal (PRS) may be used. The PRS is a reference signal used to estimate the position of the UE.

[0095] The positioning frequency layer may include one or more PRS resource sets, each of which includes one or more PRS resources.

[0096] Sequence Generation

[0097] The PRS sequence r(m) (m=0, 1, . . . ) can be defined by Formula 1.

[0098] [Formula 1]

[0099]

[0100] In Formula 1, c(i) may be a pseudo-random sequence. The pseudo-random sequence generator may be initialized by Formula 2.

[0101] [Formula 2]

[0102]

[0103] It can be the timeslot number in the frame in the SCS configuration μ. DL PRS sequence ID It may be given by a higher-layer parameter (eg, DL PRS SequenceID). l may be the OFDM symbol in the time slot to which the sequence is mapped.

[0104] Mapping of physical resources to DL PRS resources

[0105] Specifically, through equation 3, the PRS sequence r(m) can be obtained by PRS Scale and map to RE(k,l) p，μ . (k, l) p，μ The RE(k, l) of antenna port p and SCS configuration μ can be represented.

[0106] [Formula 3]

[0107]

[0108] m=0,1,…

[0109]

[0110] In this article, the following conditions must be met:

[0111] -RE(k, l) p，μ Included in the RBs occupied by the DL PRS resources configured for the UE;

[0112] - Symbol 1 is not used by the serving cell for any SS / PBCH block used for DL ​​PRS sent from the serving cell, or is indicated by the higher layer parameter SSB-positionInBurst for DL ​​PRS sent from a non-serving cell;

[0113] -The time slot number meets the following PRS resource set related conditions;

[0114] It is the first DL PRS symbol in the time slot, which can be given by the higher-layer parameter DL-PRS-ResourceSymbolOffset. The time domain size of the DL PRS resource L PRS ∈{2, 4, 6, 12} can be given by the high-level parameter DL-PRS-NumSymbols. Comb size It can be given by the high-level parameter transmissionComb. PRS and Combination of It can be one of {2,2}, {4,2}, {6,2}, {12,2}, {4,4}, {12,4}, {6,6}, {12,6} and / or {12,12}. RE offset It can be given by combOffset. The frequency offset k′ can be as shown in Table 5 function.

[0115] [Table 5]

[0116]

[0117] The reference point for k=0 may be the position of point A in the positioning frequency layer where DL PRS resources are configured. Point A may be given by a higher layer parameter dl-PRS-PointA-r16.

[0118] Mapping to time slots in DL PRS resource set

[0119] The DL PRS resources included in the DL PRS resource set may be transmitted in a slot and a frame satisfying Equation 4 below.

[0120] [Formula 4]

[0121]

[0122] Can be the number of slots per frame in the SCS configuration μ. f It can be the System Frame Number (SFN). It can be the timeslot number in the frame in the SCS configuration μ. Timeslot Offset It can be given by the higher-level parameter DL-PRS-ResourceSetSlotOffset. DL PRS resource slot offset It can be given by the higher-level parameter DL-PRS-ResourceSlotOffset. It can be given by the higher-level parameter DL-PRS-Periodicity. It can be given by the higher-level parameter DL-PRS-ResourceRepetitionFactor. It can be given by the higher-level parameter DL-PRS-MutingBitRepetitionFactor. It can be given by the higher-level parameter DL-PRS-ResourceTimeGap.

[0123] The PRS reception process of the terminal in the NR system to which various embodiments of the present disclosure may be applied may be based on the following Table 6.

[0124] [Table 6]

[0125]

[0126]

[0127]

[0128] UE positioning architecture

[0129] Figure 7 An exemplary system architecture for measuring the positioning of a UE, to which embodiments may be applied, is illustrated.

[0130] Reference Figure 7 , the AMF may receive a request for location services associated with a specific target UE from another entity such as a Gateway Mobile Location Center (GMLC), or the AMF itself decides to initiate location services on behalf of a specific target UE. The AMF then sends a request for location services to a Location Management Function (LMF). When a request for location services is received, the LMF may process the request for location services and then return a processing result including the estimated location of the UE to the AMF. In the event that location services are requested by an entity other than the AMF, such as a GMLC, the AMF may send the processing result received from the LMF to that entity.

[0131] The next generation evolved NB (ng-eNB) and gNB are network elements of NG-RAN that can provide measurement results for positioning. The ng-eNB and gNB can measure the radio signal for the target UE and send the measurement result value to the LMF. The ng-eNB can control several TPs or only PRS TPs such as the RF remote head to support the PRS-based beacon system of E-UTRA.

[0132] The LMF is connected to an Enhanced Serving Mobile Location Center (E-SMLC), which enables the LMF to access E-UTRAN. For example, the E-SMLC can enable the LMF to support OTDOA, one of the positioning methods of E-UTRAN, using DL measurements obtained by the target UE through signals sent by eNBs and / or PRS-only TPs in E-UTRAN.

[0133] The LMF may be connected to a SUPL Positioning Platform (SLP). The LMF may support and manage different location services for a target UE. The LMF may interact with a serving ng-eNB or a serving gNB of the target UE to obtain location measurements for the UE. For positioning of the target UE, the LMF may determine positioning methods based on the location service (LCS) client type, required quality of service (QoS), UE positioning capabilities, gNB positioning capabilities, and ng-eNB positioning capabilities, and then apply these positioning methods to the serving gNB and / or serving ng-eNB. The LMF may determine additional information such as the accuracy of the location estimate and the speed of the target UE. The SLP is the Secure User Plane Location (SUPL) entity responsible for positioning on the user plane.

[0134] The UE can measure its position using the DL RS sent by the NG-RAN and the E-UTRAN. The DL RS sent by the NG-RAN and the E-UTRAN to the UE may include SS / PBCH blocks, CSI-RS and / or PRS. Which DL RS is used to measure the position of the UE may comply with the configuration of the LMF / E-SMLC / ng-eNB / E-UTRAN, etc. The position of the UE may be measured by a RAT-independent scheme using different global navigation satellite systems (GNSS), ground beacon systems (TBS), WLAN access points, Bluetooth beacons, and sensors installed in the UE (e.g., air pressure sensors). The UE may also include an LCS application or access the LCS application by communicating with a network accessed by it or by another application included therein. The LCS application may include the measurement and calculation functions required to determine the position of the UE. For example, the UE may include an independent positioning function such as a global positioning system (GPS) and report its position independently of NG-RAN transmission. This independently obtained positioning information can be used as auxiliary information for the positioning information obtained from the network.

[0135] Operations for UE positioning

[0136] Figure 8 An implementation example of a network for UE positioning is illustrated.

[0137] When the AMF receives a request for location services while the UE is in Connection Management (CM)-Idle state, the AMF may request a network-triggered service to establish a signaling connection with the UE and allocate a specific serving gNB or ng-eNB. Figure 7 In other words, Figure 8 In the present embodiment, the UE may be assumed to be in connected mode. However, while the positioning procedure is still in progress, the NG-RAN may release the signaling connection as a result of signaling and data inactivity.

[0138] Now refer to Figure 8 The operation process of the network for UE positioning is described in detail. In step 1a, a 5GC entity such as a GMLC may send a request for a location service for measuring the location of a target UE to a serving AMF. Here, even when the GMLC does not request a location service, the serving AMF may determine that a location service is required to measure the location of the target UE according to step 1b. For example, the serving AMF may determine that it will perform a location service to measure the location of the UE for an emergency call.

[0139] In step 2, the AMF transmits a request for location services to the LMF. In step 3a, the LMF may initiate a location procedure with the serving ng-eNB or serving gNB to obtain location measurement data or location measurement assistance data. For example, the LMF may send a request for location-related information associated with one or more UEs to the NG-RAN, and indicate the type of necessary location information and the associated QoS. The NG-RAN may then transmit location-related information to the LMF in response to the request. In this case, when the location determination method according to the request is an enhanced cell ID (E-CID) scheme, the NG-RAN may transmit additional location-related information to the LMF in one or more NR Positioning Protocol A (NRPPa) messages. Here, "location-related information" may refer to all values ​​used for location calculation such as actual location estimate information and radio measurements or location measurements. The protocol used in step 3a may be the NRPPa protocol to be described later.

[0140] In addition, in step 3b, the LMF may initiate a location process for DL ​​positioning together with the UE. For example, the LMF may send location assistance data to the UE or obtain a location estimate or location measurement. For example, in step 3b, a capability information transmission process may be performed. Specifically, the LMF may send a request for capability information to the UE, and the UE may send capability information to the LMF. Here, the capability information may include information about positioning methods that can be supported by the LFM or the UE, information about various aspects of a specific positioning method (such as various types of assistance data for A-GNSS), and information about common features that are not specific to any one positioning method (such as the ability to handle multiple LPP transactions). In some cases, even though the LMF does not send a request for capability information, the UE may provide capability information to the LMF.

[0141] As another example, in step 3b, a location assistance data transmission process may be performed. Specifically, the UE may send a request for location assistance data to the LMF and indicate to the LMF the specific location assistance data required. The LMF may then transmit the corresponding location assistance data to the UE in one or more additional LTE Positioning Protocol (LPP) messages and transmit additional assistance data to the UE. The location assistance data delivered from the LMF to the UE may be sent in a unicast manner. In some cases, the LMF may transmit location assistance data and / or additional assistance data to the UE without receiving a request for assistance data from the UE.

[0142] As another example, in step 3b, a location assistance data transmission process may be performed. Specifically, the LMF may send a request for location (related) information associated with the UE to the UE, and indicate the type of necessary location information and the associated QoS. In response to the request, the UE may transmit location-related information to the LMF. In addition, the UE may transmit additional location-related information to the LMF in one or more LPP messages. Here, "location-related information" may refer to all values ​​used for location calculation such as actual location estimate information and radio measurements or location measurements. Typically, location-related information may be a reference signal time difference (RSTD) value measured by the UE based on a DL RS sent to the UE by multiple NG-RANs and / or E-UTRANs. Similar to the above description, the UE may transmit location-related information to the LMF without receiving a request from the LMF.

[0143] The process performed in step 3b can be performed independently, but can be performed continuously. Generally, although step 3b is performed in the order of capability information transmission process, location assistance data transmission process and location information transmission process, step 3b is not limited to such order. In other words, step 3b does not need to occur in a specific order to facilitate increased flexibility in positioning. For example, the UE can request location assistance data at any time to execute a previous request for location measurement made by the LMF. In the event that the location information sent by the UE does not meet the required QoS, the LMF can also request location information such as location measurement values ​​or location estimates at any time. Similarly, when the UE does not perform measurements for location estimation, the UE can send capability information to the LMF at any time.

[0144] In step 3b, when the information or request exchanged between the LMF and the UE is erroneous, an error message may be sent and received, and an abort message for aborting positioning may be sent and received.

[0145] The protocol used in step 3b may be the LPP protocol which will be described later.

[0146] Step 3b may be performed in addition to step 3a, or may be performed instead of step 3a.

[0147] In step 4, the LMF may provide a location service response to the AMF. The location service response may include information on whether the UE positioning is successful and include the UE's location estimate. Fig.11 If the procedure has been initiated by step 1a, the AMF may deliver the location service response to the 5GC entity such as the GMLC. Fig.11 If the procedure has been initiated by step 1b, the AMF may use the location services response to provide location services associated with the emergency call.

[0148] Positioning Protocol

[0149] LTE Positioning Protocol (LPP)

[0150] Fig. 9 An exemplary protocol layer for supporting LPP message transmission between LMF and UE is illustrated. LPP protocol data unit (PDU) can be carried in NAS PDU between AMF and UE.

[0151] Reference Fig. 9 , LPP terminates between the target device (e.g., UE in the control plane or SUPL-enabled terminal (SET) in the user plane) and the location server (e.g., LMF in the control plane or SLP in the user plane). LPP messages can be carried as transparent PDUs across intermediate network interfaces using appropriate protocols (e.g., NGAP over NG-C interface and NAS / RRC over LTE-Uu and NR-Uu interfaces). LPP is intended to enable positioning for NR and LTE using various positioning methods.

[0152] For example, the target device and the location server may exchange capability information, assistance data for positioning, and / or location information therebetween through LPP. The target device and the location server may exchange error information and / or indicate termination of the LPP process through LPP messages.

[0153] NR Positioning Protocol A (NRPPa)

[0154] Fig.10 Exemplary protocol layers for supporting NRPPa PDU delivery between LMF and NG-RAN nodes are illustrated.

[0155] NRPPa can be used to carry information between NG-RAN nodes and LMF. Specifically, NRPPa can carry E-CID for measurement, data for supporting OTDOA positioning method, and cell ID and cell location ID for supporting NR cell ID positioning method transmitted from ng-eNB to LMF. AMF can route NRPPa PDU through NG-C interface based on the routing ID of the LMF involved without information about the relevant NRPPa transaction.

[0156] The NRPPa procedures for location and data collection can be divided into two types. The first type is a UE-associated procedure for transmitting information about a specific UE (e.g., location measurement information), and the second type is a non-UE-associated procedure for transmitting information applicable to NG-RAN nodes and associated TPs (e.g., gNB / ng-eNB / TP timing information). These two types can be supported independently or simultaneously.

[0157] Positioning measurement method

[0158] Positioning methods supported in NG-RAN may include GNSS, OTDOA, E-CID, air pressure sensor positioning, WLAN positioning, Bluetooth positioning, TBS, uplink time difference of arrival (UTDOA), etc. Although any one of the positioning methods may be used for UE positioning, two or more positioning methods may be used for UE positioning.

[0159] OTDOA (Observed Time Difference of Arrival)

[0160] Fig.11 is a diagram illustrating an observed time difference of arrival (OTDOA) positioning method to which the embodiments are applicable.

[0161] The OTDOA positioning method uses the time measured by the UE from the DL signals received by multiple TPs including eNB, ng-eNB and PRS-only TP. The UE uses the location assistance data received from the location server to measure the time of the received DL signal. The location of the UE can be determined based on such measurement results and the geographic coordinates of the neighboring TPs.

[0162] A UE connected to a gNB may request measurement gaps from a TP to perform OTDOA measurements. If the UE does not know the SFN of at least one TP in the OTDOA assistance data, the UE may use autonomous gaps to obtain the SFN of the OTDOA reference cell before requesting measurement gaps for performing reference signal time difference (RSTD) measurements.

[0163] Here, RSTD may be defined as the minimum relative time difference between two subframe boundaries received from the reference cell and the measurement cell. That is, RSTD may be calculated as the relative time difference between the start time of the subframe received from the measurement cell and the start time of the subframe from the reference cell that is closest to the subframe received from the measurement cell. The reference cell may be selected by the UE.

[0164] For accurate OTDOA measurement, it is necessary to measure the time of arrival (ToA) of signals received from three or more TPs or BSs distributed geographically. For example, the ToA of each of TP1, TP2, and TP3 can be measured, and the RSTD for TP1 and TP2, the RSTD for TP2 and TP3, and the RSTD for TP3 and TP1 are calculated based on the three ToA values. The point where the geometric hyperbola and the hyperbola intersect is determined based on the calculated RSTD value and can be estimated as the position of the UE. In this case, the accuracy and / or uncertainty of each ToA measurement may occur, and according to the measurement uncertainty, the estimated position of the UE can be referred to as a specific range.

[0165] For example, the RSTD of two TPs may be calculated based on the following Equation 5.

[0166] [Formula 5]

[0167]

[0168] In Equation 5, c is the speed of light, {x t ,y t} are the (unknown) coordinates of the target UE, {x i ,y i} are the (known) coordinates of TP, and {x1, y1} are the coordinates of a reference TP (or another TP). i -T1) is the transmission time offset between the two TPs, called the “real time difference” (RTD), and n i and n1 is the UE ToA measurement error value.

[0169] E-CID (Enhanced Cell ID)

[0170] In the cell ID (CID) positioning method, the location of the UE can be measured based on the geographic information of the UE's serving ng-eNB, serving gNB and / or serving cell. For example, the geographic information of the serving ng-eNB, serving gNB and / or serving cell can be obtained through paging, registration, etc.

[0171] In addition to the CID positioning method, the E-CID positioning method may use additional UE measurements and / or NG-RAN radio resources to improve the UE position estimate. Although the E-CID positioning method may partially utilize the same measurement method as the measurement control system on the RRC protocol, additional measurements that are only used for UE position measurement are generally not performed. In other words, no additional measurement configuration or measurement control message may be provided for UE position measurement. The UE does not expect to request additional measurement operations that are only used for position measurement, and the UE may report measurement values ​​obtained by a generally measurable method.

[0172] For example, the serving gNB may use the E-UTRA measurements provided by the UE to implement the E-CID positioning method.

[0173] The measuring elements that can be used for E-CID positioning may be, for example, as follows.

[0174] -UE measurements: E-UTRA Reference Signal Received Power (RSRP), E-UTRA Reference Signal Received Quality (RSRQ), UE E-UTRA Receive (Rx)-Transmit (Tx) Time Difference, GERAN / WLAN Reference Signal Strength Indicator (RSSI), UTRAN Common Pilot Channel (CPICH) Received Signal Code Power (RSCP) and / or UTRAN CPICH Ec / Io

[0175] -E-UTRAN measurements: ng-eNB Rx-Tx time difference, timing advance (TADV) and / or AoA

[0176] Here, T ADV It can be divided into type 1 and type 2 as follows.

[0177] TADV type 1 = (ng-eNB Rx-Tx time difference) + (UE E-UTRA Rx-Tx time difference)

[0178] TADV type 2 = ng-eNB Rx-Tx time difference

[0179] AoA can be used to measure the direction of the UE. AoA is defined as the estimated angle of the UE counterclockwise from the eNB / TP. In this case, the geographic reference direction can be north. The eNB / TP can use UL signals such as SRS and / or DMRS for AoA measurement. As the arrangement of antenna arrays increases, the measurement accuracy of AoA increases. When the antenna arrays are arranged at the same interval, the signals received at adjacent antenna elements can have a constant phase rotation.

[0180] CPM (Carrier Phase Measurement)

[0181] Carrier phase measurement (CPM) is one of the position estimation algorithms used in GPS / GNSS. In short, CPM is a scheme for estimating the distance between a transmitter and a receiver by measuring the phase of a received transmission signal and determining the position based on the estimated distance. In other words, the position of a user can be measured by calculating the distance to each of a plurality of satellites based on signals received from a plurality of satellites. In this case, it is assumed that there is a line of sight (LoS) between the satellite and the user, and based on this assumption, the time difference between the transmitter and the receiver can be converted into the distance between the transmitter and the receiver. At the same time, the satellite channel may experience multipath and delay caused by the ionosphere, but the multipath and delay caused by the ionosphere can be mitigated by modeling.

[0182] Table 7 below shows what is discussed regarding (3GPP) CPM in a specific case.

[0183] [Table 7]

[0184]

[0185]

[0186] The above CPM can be compared with code phase measurement. Although code phase measurement is commonly used in GPS / GNSS related positioning, the actual phase of the carrier can be measured directly. Generally, CPM provides higher accuracy than code phase measurement because CPM directly measures the phase within a period corresponding to the carrier frequency. At the same time, CPM and code phase measurement can be performed based on similar or identical algorithms or methods.

[0187] In CPM, the following basic positioning principle can be used: the transmitter sends a predetermined signal at a specific time, and the receiver measures the exact reception time at the carrier phase level (i.e., within a period of the carrier frequency). In this case, the distance between the transmitter and the receiver can be measured very accurately based on CPM. In order to use this method, the distance is usually converted into a phase, and a pseudo-range formula can be derived based on the conversion. As CPM positioning based on a pseudo-range formula, positioning based on GNSS / GPS can be performed by applying the following formula 6.

[0188] [Formula 6]

[0189] p=ρ+d p +c(dt-dT)+d ion +d trop +e mp +e p

[0190] In Equation 6, p represents the pseudo-range measurement, ρ represents the true distance, and d p represents the satellite orbit error, c represents the speed of light, dt represents the offset between the satellite clock and GPS time, dT represents the offset between the receiver clock and GPS time, and d ion represents the ionospheric delay, d trop represents the tropospheric delay, e mp represents the multipath effect, and e p Represents the receiver noise.

[0191] These terms can be accounted for in GPS / GNSS, and there are techniques to mitigate or remove each term. In addition, although not explicitly stated in Equation 6, the carrier phase information that the user can estimate is in the range of [0, 2π]. For distances outside this range, a separate estimation method is required. In other words, when the actual distance between the user and the satellite is converted into phase, the receiver needs to estimate the distance corresponding to an integer multiple of the frequency period through a separate estimation method (integer ambiguity resolution).

[0192] Differentiation

[0193] CPM has very high positioning accuracy at the centimeter level, and one of the technologies that can achieve this is differentiation. Here, differentiation can be an algorithm that assumes that there is a clock error in the transmitter and / or receiver and removes the assumed clock error. A method for removing the clock error of the transmitter (or satellite) can be as follows.

[0194] The signal sent from the transmitter at time t1 may include the transmitter's clock error. The signal sent from the transmitter may be received at different receivers, and a common transmitter clock error may be included in the signals received at the different receivers. In this case, if the difference between the signals received at each receiver is calculated, the transmitter's clock error may be effectively removed. This method of removing the clock error may be defined as Rx differential.

[0195] Similarly, the removal of the receiver's clock error can be achieved. For example, two signals can be sent from temporally / spatially different transmitters. One receiver can receive two signals sent from different transmitters. In this case, a common receiver clock error can be included between the two received signals, and the receiver's clock error can be effectively removed by finding the reception time difference between the two received signals. In this way, the method of removing the clock error can be defined as Tx differential.

[0196] Generally, CPM in GPS / GNSS targets very high accuracy (centimeter level), so the clock errors of the above transmitter and receiver become the main obstacle to achieving the target accuracy. Therefore, the above Tx differential and Rx differential can be performed, which can be defined as DD (double differential).

[0197] Positioning using CPM in GNSS / GPS may also take the following into account. Specifically, cycle slips may occur at the receiver, which may require reporting or correction. Cycle slips may occur when the receiver cannot track a signal for more than a certain threshold (e.g., half a cycle). When such a cycle slip occurs, the measurements from the transmitter for the corresponding period may become invalid. After a cycle slip, the measurements may be reused, but the integer ambiguities need to be re-estimated.

[0198] In addition, the problem of position dilution (dilution of accuracy) may also occur. Position dilution means that even when positioning is performed based on the same number of transmitters and receivers and at the same signal-to-noise ratio (SNR), the accuracy of positioning may vary depending on the relative position (or distance) between the transmitter and the receiver, which is generally referred to as the geometric dilution of accuracy (GDOP). For example, when a receiver calculates a position based on signals from N transmitters, the positioning accuracy of the receiver may be lower if the transmitters are closely grouped than if the transmitters are more evenly distributed.

[0199] Integer ambiguity resolution

[0200] First, the following can be considered as a scheme related to integer ambiguity resolution (see Lee, Hongkyu (2014). "An Instantaneous Integer Ambiguity Resolution for GPS Real-Time Structure Monitoring," Journal of Korean Society of Civil Engineers, Vol. 34, No. 1, pp. 342-353 (Korean)).

[0201] In dynamic positioning using GPS carriers, centimeter-level accuracy can be achieved by accurately determining the unknown integer ambiguities contained in the observation data. To this end, ambiguity resolution is required, which is a mathematical process for converting ambiguous distance observation data with uncertainty into precise distances with millimeter-level accuracy. For GPS dynamic positioning, integer constrained least squares are usually applied (Teunissen, 1994; Han et al., 1997; Verhagen, 2004).

[0202] However, when the receiver is moving, there are limitations on the observation data that can be used in the mathematical model compared to when the receiver is stationary, resulting in lower estimation accuracy and higher correlation, which makes it difficult to resolve integer ambiguities quickly and accurately (Teunissen, 1993; Lee et al., 2005). Therefore, in GPS dynamic positioning, on-the-fly (OTF) methods are usually used, which only extract and accumulate the integer ambiguity part of the normal equation. The time required for initializing the integer ambiguities can range from a few seconds to a few minutes, depending on the satellite geometry and residual errors (Hofmann-Wellenhof et al., 2001). As long as there is no signal interruption (cycle slip), this method relies on the previously determined integer ambiguities after initialization. In this method, when initialization is required, it is impossible to perform high-precision positioning during initialization. In addition, due to changes in satellite geometry, integer ambiguities need to be recalculated and continuous monitoring of signal interruptions is required, which makes the algorithm inherently complex.

[0203] In the mid-1990s, with the advent of dual-frequency receivers capable of observing precise pseudoranges, instantaneous ambiguity resolution has been developed for baselines of about 10 km (Han et al., 1996). This method independently resolves integer ambiguities for each period of time when the GPS receiver acquires carrier phase and precise pseudoranges. Since this method does not require additional algorithms for checking signal outages or satellite geometry, it is suitable for GPS structure monitoring environments where such outages occur frequently due to structures or passing vehicles. However, the performance of instantaneous ambiguity resolution is significantly affected by satellite geometry and residuals. In particular, its performance degrades when fewer than 5 satellites are observed or when multipath effects become significant (Lee et al., 2004).

[0204] There are a variety of algorithms for performing integer ambiguity resolution, and one of the most well-known and effective methods is the least squares ambiguity decorrelation adjustment (LAMBDA). In order to use LAMBDA, the floating estimate of the position, i.e., the positioning within the cycle, should be separated from the integer ambiguities. Since the integer ambiguities are integers rather than floating point values, the obtained floating point solution is not an exact solution and can be further refined. The ellipsoid formed by the covariance of the integer ambiguities becomes extremely elongated in one direction, and as a result, the search in this space is inefficient. Therefore, LAMBDA transforms the system with an elongated ellipsoid into a system that is closer to a sphere, which is more efficient than previous methods in searching for solutions to integer ambiguities.

[0205] Another method for estimating integer ambiguities involves using CPM and code phase measurements at various epochs. The disadvantage of this method is that time conversion values ​​are required to obtain the correlation between the CPM and code phase measurements, and the 1Hz GPS output from the Novatel Superstar II. A brief summary of this is to use the measurements of a single epoch and the covariance of the integer ambiguities from the previous epoch. The reason for using the covariance from the previous epoch is that the integer ambiguities remain constant over two epochs as the receiver maintains phase lock on the carrier phase. Additionally, there are other algorithms for estimating integer ambiguities, such as those based on the Extended Kalman Filter, and there are many variations.

[0206] CPM in NR

[0207] The above-mentioned CPM in GPS / GNSS can be based on a single carrier. Specifically, in CPM, the phase can be estimated based on the transmission and reception of sinusoidal signals, rather than in the code domain. The CPM between satellites and users in GPS / GNSS can be introduced into gNB (or TRP) and UE in NR. When introducing it into NR, there may be the following differences. Unless the sinusoidal signal is redefined as a reference signal, OFDM-based CPM should be performed. In other words, the difference between OFDM-based CPM and GPS / GNSS-based CPM is that OFDM-based CPM is performed on a relatively broadband signal.

[0208] First, the current reference signal used for positioning in NR is PRS. If the sinusoidal signal is redefined based on PRS, the sinusoidal signal can have the configuration characteristics of PRS. That is, the bandwidth (BW) configuration of the sinusoidal signal can be more flexible. In addition, the probability of having a LoS path between the BS (or TRP) and the user can be lower than the probability of having a LoS path between the satellite and the user. In other words, since the multipath effect between the BS (or TRP) and the user cannot be ignored, the CPM in NR should also consider the multipath effect between the BS (or TRP) and the user. In the CPM in NR, from the algorithm point of view, non-line of sight (NLOS) elimination or LOS path estimation can be treated more importantly. In addition, compared with GPS, NR generally has a higher carrier frequency, a larger BW, and stricter delay requirements. Therefore, in the CPM in NR, it is necessary to further reduce the time required to resolve integer ambiguities.

[0209] Solutions may be needed to address issues related to CPM-based user positioning using PRS in NR. Since PRS is a reference signal with BW, there should be a common understanding between the higher layers and the UE about which frequency within a given PRS is used for phase measurement. In contrast, existing NR positioning methods (e.g., OTDOA, AoA, AoD, etc.) do not require the specification or indication of specific frequency resources. However, in CPM-based positioning using PRS, additional operations may be required to specify or report specific frequencies.

[0210] CPM Targeting Method Using PRS

[0211] In a wireless access system, a user position estimation scenario based on carrier phase measurement (CPM) or carrier phase positioning (CPP) may be considered. CPM refers to a position measurement scheme that calculates the distance between a gNB and a user based on the phase of a specific frequency (carrier), similar to the case where a UE that has received a reference signal configured by a gNB for estimating a user's position estimates the distance from the gNB to the user based on the time difference between the transmission time of the reference signal and the reception time of the reference signal. In addition, CPM may be a scheme for calculating or estimating the distance between UEs based on the phase of a specific frequency, similar to the case where a user that has received a reference signal configured for position estimation between users (or UEs) estimates the distance from a UE that has transmitted a reference signal to a UE that has received the reference signal based on the time difference between the transmission time of the reference signal and the reception time of the reference signal. In order to eliminate the clock error or timing error of the transmitter and the receiver in such a distance estimation scheme, the following method may be considered.

[0212] Specifically, with respect to eliminating the clock error or timing error of the transmitter and the receiver, differentiation can be used to obtain the difference between the signals received from different transmitters at a single receiver and / or the difference between the signals received from the same transmitter at different receivers. When performing differentiation, the UE needs to determine a pair of PRSs among the received PRSs on which differentiation is to be performed and the differentiation result is to be reported. Hereinafter, a method of indicating and determining a pair of (PRS) for such differentiation will be described.

[0213] Although the differential operation is described below based on the assumption of CPM, the differential operation can also be applied to positioning technologies other than CPM, because the purpose of the differential is to eliminate the Tx clock (timing) error and the Rx clock (timing) error. For example, the differential operation described below can be simply extended and applied to timing-based (position) estimation methods (e.g., OTDOA, RTT, etc.) and angle-based (position) estimation methods (e.g., AoD, AoA, etc.). Here, the differential can be used for measurements in the time domain or the angle / spatial domain instead of the phase domain.

[0214] Alternatively, a case where CPM is performed when a PRS indicated by the LMF or gNB is received may be considered. Double differential considered for CPM in existing GNSS / GPS may be a technique for eliminating the offset of the transmit / receive (Tx / Rx) clock from the absolute time. In short, double differential is a method in which a single Rx UE measures the reception time of each signal sent from different Tx UEs to eliminate the Rx clock error, and eliminates the common term Rx clock error by the difference between the measured reception times, and is a method in which different Rx UEs measure the reception time of signals sent from a single Tx UE to eliminate the Tx clock error, and eliminates the common error term Tx clock error by the difference between the measured reception times. In this article, the clock error may be a timing error, such as an error at a time slot boundary of a Tx UE or Rx UE (in a packet transmission system such as NR).

[0215] For CPM in NR, it is necessary to perform differentiation (e.g., measurement of phase difference) with the aim of eliminating Tx / Rx clock errors, as in GPS / GNSS. However, from the UE's perspective, it may not always be possible to receive the PRS for a specific TRP or ensure sufficient SNR. In addition, when differentiation is performed simultaneously and the UE reports the received phase difference, the UE needs to inform the LMF which pair of PRSs among multiple PRSs is differentiated, or even the reference (i.e., AB or BA) based on which the differentiation has been performed. In addition, when there is a positioning reference unit (PRU) whose precise position is known, similar to the real-time kinematic (RTK) of GPS / GNSS, the reference for differentiation can be configured / determined as the PRS sent by the PRU. In this regard, when the UE is configured with CPM, it may expect to receive or be configured with information about candidate pairs for differentiation. The method for determining the PRS pair for the above-mentioned differentiation by the UE will be described in detail below.

[0216] In order to estimate the UE position using CPM, the UE may be configured with PRS resources and instructed by the LMF or gNB to measure and report the measurement results of the PRS resources. When differential is configured, a single report may be based on multiple (PRS) resources, compared to a method of measuring and reporting, for example, RSRP or AoA in a configured (PRS) resource by a positioning method in a conventional NR (i.e., compared to one report for a single resource). For example, in order to eliminate the Rx clock (timing) error, the UE may be configured to measure each PRS received from different TRPs within a specific time, but report the difference between the phases measured in the two (PRS) resources. In this way, when a UE receiving a PRS performs differential measurement and reports the differential result, the UE may require multiple (PRS) resources for a single report. In the following, the multiple resources required for a single report are defined as a differential (PRS resource) pair, and the method of determining the differential pair will be described in detail.

[0217] Hereinafter, TDW represents a time domain window, and the UE may determine to perform differential measurement and reporting only for PRS resources received within the corresponding TDW. In other words, the UE expects that PRS resources that can potentially perform differential measurement may be received within the TDW.

[0218] (1) Alternative 1

[0219] A candidate (PRS) resource set that can perform differentiation to eliminate Tx / Rx timing errors may be indicated or configured for the UE. That is, a differential resource set as a resource set for differentiation may be configured, and the differential resource set may be indicated and configured separately from the TWD.

[0220] A differential resource set may be a set of two or more PRS resource IDs or PRS resource set IDs or TRP IDs. The UE may report the subcarrier phase difference between the PRSs received in the differential resource set or the phase difference of a specific carrier (e.g., a center carrier) as a measurement result, or include and report it in the measurement result. Alternatively, a reference PRS resource ID, a PRS resource set ID, or a TRP ID may be indicated for the differential resource set. When the UE reports the measurement result of the phase difference between the PRS resources in the differential resource set, the UE may report information about the phase difference based on the reference PRS resource. (For purposes such as double differential / triple differential, or because it is a candidate even in single differential), a single PRS resource ID, PRS resource set ID, or TRP ID may exist for multiple sets. That is, the UE may report the phase difference between the PRS (resource) used as a reference in the indicated differential resource set and the PRS (resource) among the PRSs of the indicated differential resource set, or a value derived from the phase difference. In this case, the UE may report a pairing ID indicating the pair for which the report is intended among multiple candidate (differential) pairs. That is, when the LMF instructs the UE to measure the PRS resources for position estimation in the CPM method, the UE may consider that a resource set for differential (or differential resource set) is also indicated. The differential resource set may be indicated based on the frequency layer.

[0221] Alternatively, in the case where the reference (or reference PRS) in the differential resource set is not indicated, when reporting the phase difference between two received PRSs, the UE may determine the reference PRS based on a preset condition and measure the phase difference between the determined reference PRS and another PRS. For example, the UE may always report the difference obtained by subtracting a PRS with a lower TRP ID or PRS resource set ID number from a PRS with a higher TRP ID or PRS resource set ID number or a value derived from the difference (i.e., a PRS with a higher TRP ID or PRS resource set ID among multiple PRSs may be determined as a reference PRS according to a preset condition). Alternatively, the reference PRS resource ID, PRS resource set ID, or TRP ID for the configured (PRS) resource set may always be indicated to the UE. Therefore, when reporting the phase difference, the UE may always report the phase difference between the PRS used as a reference and another PRS in the configured resource set.

[0222] When the UE reports the phase difference between the PRS resources in the above method, one PRS ID may be indicated as a reference in the differential resource set (ie, when the reference is indicated by the PRS resource ID). In this case, the UE may report another PRS resource ID in addition to the reference in the two PRS resource IDs on which the difference has been performed, or both another PRS resource ID and the differential resource set ID. Alternatively, when the UE reports the phase difference between the PRS resources, the PRS resource set ID or the TRP ID may be indicated as a reference in the differential resource set. In this case, the UE may report the two PRS resource IDs on which the difference has been performed, or report the two PRS resource IDs and the differential resource set ID together. Alternatively, when the UE reports the phase difference between the PRS resources in the above method, the UE may receive an indication of the differential resource set without receiving the PRS resource as a reference or an indication of the PRS resource as a reference. In this case, the UE may report the two PRS resource IDs on which the difference has been performed, or report the two PRS resource IDs and the differential resource set ID together.

[0223] Alternatively, when the UE reports the phase difference between different PRS resources in the differential resource set in the above method, the PRS resource, PRS resource set or TRP used as a reference may be indicated. In this case, it is necessary to determine the PRS resource to be differentiated from the received PRS resource as a reference for measurement reporting. Alternatively, when the reference is not indicated or configured, it is necessary to determine two PRS resources in the differential resource set to be differentiated for measurement reporting. In this case, the UE may determine the two PRS resources based on a predetermined reception quality of the PRS resources (e.g., based on an associated RSRP / RSSI or related value), and use the PRS resource with the best quality as the reference PRS. Alternatively, the UE may determine the PRS resource with the best quality as the reference PRS based on the reception quality of the PRS resources determined based on the UE implementation.

[0224] In other words, when a differential PRS resource set is indicated, but a reference PRS associated with the differential PRS resource set is not indicated, the UE may determine the reference PRS based on the quality of the PRS received in the differential PRS resource set. For example, the UE may determine the PRS with the best (received) quality among the received PRSs as the reference PRS. In addition, the UE may determine the PRS with the quality second only to the reference PRS with the best quality as another PRS. In this case, the UE may measure the phase difference between the determined reference PRS and the other PRS, and report information about the measured phase difference. In this case, the UE may also report information about the IDs of the reference PRS and the other PRSs.

[0225] As a method of indicating a differential candidate resource set (or differential PRS resource set) for differential as described above, the following may be considered. For example, the UE may expect that a resource set for (potential) differential is indicated or will be indicated through a cell-specific channel or a UE group-specific channel (such as system information). That is, the differential candidate resource set may be indicated to the UE by a serving cell through a cell-specific or UE group-specific signal / channel instead of the LMF. For example, the differential candidate resource set may be indicated through the SIB. Alternatively, the LMF may indicate information about a differential candidate resource set list to the UE (or LPP) through auxiliary information. At the same time, this indication method is only an example, and information about one or more differential candidate resource sets may be indicated according to other indication methods.

[0226] Alternatively, the UE may perform differentiation on a specific (PRS) resource pair in the differential candidate resource set indicated or configured in the above method, and report information about the phase value of each PRS of the specific (PRS) resource pair or the phase difference between multiple PRSs received as a specific (PRS) resource pair. The UE may determine the specific (PRS) resource pair in the differential candidate resource set based on the recommendation of the LMF. The recommendation of the LMF may be pre-agreed after the first time point of indicating the differential candidate resource set to the UE and before the measurement report time point of the CPM. For example, information about the recommendation of the LMF may be provided in the indication of the auxiliary information of the CPM. Alternatively, information about the recommendation of the LMF may be provided together with the auxiliary information of the LMF in response to a request for auxiliary information from the UE. That is, the UE may be configured with information about differential candidate resource sets by the LMF, some resource sets in the differential candidate resource sets (i.e., recommendations of the LMF) may be indicated to the UE for performing differential of the measured phase based on the UE and / or UE-assisted CPM, and the UE may consider performing differential on all or some of the received resources in the resource set and report the result to the LMF. In other words, information about differential candidate resource sets may be configured for the UE by the LMF, and some resource sets (or resource pairs) in the differential candidate resource sets may be indicated to the UE by the recommendation of the LMF, and the UE may perform differential on some or all of the received PRSs in the resource sets (or resource pairs), and report the differential result to the LMF.

[0227] Alternatively, the UE may request the LMF to indicate one or more resource pairs in the differential candidate resource set for the purpose of performing actual differentiation or some resource pairs in the differential candidate resource set. Alternatively, the UE may provide the LMF with information about one or more resource pairs in the differential candidate resource set for the purpose of performing actual differentiation or some resource pairs in the differential candidate resource set, and request the LMF to allow differentiation based on these resource pairs. In this case, when the LMP accepts the UE's request, the UE may report the result of performing differentiation for CPM. Alternatively, regardless of whether the LMF accepts the request, the UE may perform differentiation for CPM according to the request after the UE's request, and report the result or measurement result of the differentiation. This method may be useful when the UE requests a single pair. In other words, the UE may determine at least one PRS resource pair in the configured differential candidate resource set, and provide information about the determined at least one PRS pair to the LMF or gNB. Thereafter, the UE may receive information about a recommended or requested PRS pair among at least one PRS pair from the LMF or gNB, perform differentiation based on the provided PRS pair, and report the result of the differentiation to the LMF or gNB.

[0228] In the above method, the most suitable PRS pair for performing differentiation may change over time and also depend on the current position of the UE. Since it is difficult for the LMF to configure different PRS resources / resource sets instantaneously, the purpose and utility of these methods is to prevent the LMF from misunderstanding and conflicting with the LMF's judgment of the actual channel situation of the UE and the resources / resource sets for which the actual UE has performed differentiation. In other words, it may be difficult for the LMF to configure the specific PRS resource / resource set that best suits the UE by considering such appropriate PRS pairs that change over time and according to the position of the UE. Therefore, the LMF can prevent misunderstandings with the UE by configuring differential candidate resource sets and exchanging information about the PRS pairs that have performed differentiation with the UE.

[0229] (2) Alternative 2

[0230] The differential and reporting can be indicated to the UE or configured for the UE without configuring the candidate differential pair or differential PRS pair. In this case, the UE can directly determine the PRS resource (set) or PRS pair on which the differential is to be performed.

[0231] The reference or PRS pair for differentiation may be determined based on a TRP ID, etc., or the PRS pair and / or reference PRS may be determined based on a PRS resource with the best quality based on a predetermined reception quality of the PRS resource (e.g., based on an associated RSRP / RSSI or related value). Alternatively, based on the reception quality of the PRS resource determined according to the UE implementation, the UE may determine the PRS pair and / or reference PRS based on the PRS resource with the best quality. In this case (i.e., when differentiation is performed based on a PRS resource ID pair selected by the UE according to a pre-agreement or rule or according to the UE implementation), the UE may also report information about the reception quality of each PRS resource corresponding to the differential pair in a report for the determined differential pair.

[0232] In other words, when a PRS pair or a PRS reference for differential is not separately indicated, the UE can determine a reference PRS and a PRS pair in the differential candidate resource set based on the reception quality of the PRS received in the differential candidate resource set, measure the phase difference between the PRSs included in the determined PRS pair, and report the measurement result, which includes information about the measured phase difference and information about the reception quality of each PRS determined as the PRS pair.

[0233] Alternatively, a reference PRS resource ID, PRS resource set ID, or TRP ID may be indicated to / configured for the UE (without indication / configuration of a differential candidate resource set). In this case, the UE may measure the phase difference between the PRS resource corresponding to the reference PRS resource ID, PRS resource set ID, or TRP ID and another PRS, and report measurement information about the measured phase difference to the gNB / LMF. That is, based on the configured reference PRS resource set ID, TRP ID, or resource ID, the UE may measure and report the phase difference between the configured reference and another PRS selected according to a pre-agreement or UE implementation.

[0234] When the UE is configured with a reference PRS resource ID in the above method and reports the phase difference between multiple PRS resources (or the above PRS pairs) based on the configured reference PRS ID, the UE can report another PRS resource ID other than the reference PRS resource ID in the two PRS resource IDs on which differentiation has been performed together with the measurement report. Alternatively, when the UE is configured with a reference PRS resource set ID and a TRP ID and reports the phase difference between multiple PRS resources, the UE can report the two PRS resource IDs on which differentiation has been performed together with the measurement report.

[0235] Fig.12 is a diagram illustrating a method in which a UE performs a measurement operation related to carrier phase measurement.

[0236] Reference Fig.12 , the UE may receive positioning configuration information related to carrier phase measurement (hereinafter referred to as phase measurement) from the network (S121). The positioning configuration information may also include information about a plurality of PRS resources or a plurality of PRS resource sets or a plurality of differential resource sets of TRPs in a paired relationship for eliminating timing errors. The positioning configuration information may be obtained from system information sent through a cell-specific channel, or from auxiliary information sent by the LMF.

[0237] The differential resource set may include information about a plurality of PRS resources or PRS resource sets in a preset pairing relationship. For example, the differential resource set may include information about a PRS resource in which at least one PRS resource is mapped to one PRS resource or paired with one PRS resource. For example, the differential resource set may include information about the first to Nth PRS resources (e.g., PRS resource ID, PRS resource set ID, etc.), and information about a mapping / pairing relationship of at least one PRS resource to which each of the first to Nth PRS resources is mapped / paired. The network may configure / define PRS resources having a mapping / pairing relationship in consideration of a TRP suitable for differential phase measurement. For example, the network may map or pair PRS resources sent from different TRPs or transmitters. Alternatively, the network may map / pair PRS resources between TRPs in similar integer ambiguity environments (e.g., TRPs in which similar integer ambiguities may occur) to each other. For example, when a phase variation of 360 degrees*n may occur in phase measurement, the network may map / pair TRPs (or PRS resource sets or PRS resources for each TRP) where similar n values ​​may occur.

[0238] In this case, the UE (single Rx end) can measure the phase difference between the mapped or paired PRS resources included in the differential resource set included in the positioning configuration information. Since the PRS resources in the paired relationship in the differential resource set are associated with different transmitters or TRPs, the receiving clock error at the UE can be effectively eliminated from the measured phase difference.

[0239] Next, the UE may measure the phase difference between the paired PRS resources based on the differential resource set included in the positioning configuration information (S123). For example, the UE may perform phase difference measurement based on multiple PRS resources or multiple PRS resource sets included in the differential resource set to eliminate timing errors in carrier phase measurement (e.g., UE's receiving clock error).

[0240] Specifically, the UE may measure the phases of two PRS resources in a pairing relationship based on the differential resource set included in the positioning configuration information. The UE may calculate the difference between the measured phases. The UE may determine a reference PRS resource as one of the two PRS resources, and determine a paired PRS resource as another PRS resource in a pairing relationship or a mapping relationship with the reference PRS resource. Specifically, the UE may receive reference information for determining the reference PRS resource from the network, and determine the reference PRS resource based on the reference information. The reference information may be included in the positioning configuration information or sent separately. The reference information may include at least one of a reference PRS resource ID, a reference PRS resource set ID, or a reference TRP ID. The UE may determine a PRS resource corresponding to at least one of the reference PRS resource ID, the reference PRS resource set ID, or the reference TRP ID included in the reference information as the reference PRS resource.

[0241] Alternatively, when there is no indication of the reference information, the UE may determine the PRS with the highest or lowest ID among the PRS resources (or PRS resource set or TRP) included in the differential resource set as the reference PRS resource. Alternatively, when there is no indication of the reference information, the UE may determine the PRS resource or PRS resource set corresponding to the TRP with the highest or lowest ID among the TRPs for the PRS resources included in the differential resource set as the reference PRS resource. Alternatively, when there is no indication of the reference information, the UE may determine the reference TRP ID configured for the time difference of arrival (TDoA) related to positioning as the reference TRP. Alternatively, when there is no indication of the reference information, the UE may determine the PRS resource with the highest reception quality among the PRS resources included in the differential resource set as the reference PRS resource.

[0242] When the reference PRS resource is determined, the UE may determine at least one paired PRS resource mapped to the reference PRS resource / paired with the reference PRS resource based on the differential resource set. The UE may measure the first phase based on the PRS received in the determined reference PRS resource, and measure the second phase based on the PRS received in the paired PRS resource paired with the reference PRS resource. The UE may calculate the difference between the first phase and the second phase. The difference may be the difference between the second phase and the first phase. For example, when the first phase is 30 degrees and the second phase is 29.2 degrees, the phase difference may be 0.8 degrees, i.e., 30-29.2. As described above, the receiving clock error in the UE as the receiving end may be eliminated by the phase difference. At the same time, as described above, the phase difference measurement based on the reference PRS resource and the paired PRS resource may be performed based on the PRS received within a preset time window. The preset time window may be preset based on the time during which the UE can maintain the continuity of the received phase. In other words, the reference PRS resource and the paired PRS resource may be PRS received within the same TDW.

[0243] Alternatively, when multiple PRS resources are paired with / mapped to a reference PRS resource, the UE may determine the PRS resource with the highest signal quality measurement among the multiple PRS resources (within a preset time window) as the paired PRS resource. In this case, the UE may measure the phase difference based on the reference PRS resource and the paired PRS resource. Alternatively, when there is no indication of the reference PRS resource, the UE may determine the PRS resource with the highest reception quality among the PRS resources included in the differential candidate set as the reference PRS resource, and determine the PRS resource with the second highest reception quality as the paired PRS resource. That is, assuming that the PRS resources included in the differential candidate set are in a mapping or pairing relationship with each other, the UE may select / determine the reference PRS resource and the paired PRS resource based on the quality of the signal received in the differential candidate set.

[0244] Next, the UE may report / send a measurement result including measurement information about the measured phase difference to the network (S125). As described above, the phase difference is a value set using two PRS resources in a mapping or pairing relationship within a differential resource set. The UE may send a measurement result to the network, which also includes information about a reference PRS resource (e.g., a reference PRS resource ID) and / or information about a paired PRS resource (paired PRS resource ID) and the measurement information. For example, when there is no indication of a reference PRS resource, the UE may send a measurement result to the network, which includes an ID of a reference PRS resource directly determined based on the PRS resource ID and / or the reception quality of the PRS resource (i.e., the reception quality of the PRS received in the PRS resource), and / or an ID of a paired PRS resource paired with the reference PRS resource. When there is an indication of a reference PRS, the UE may send a measurement result to the network, which also includes information about an ID of a paired PRS resource mapped to / paired with the reference PRS resource.

[0245] Alternatively, the UE may also include information about the measured signal quality of the paired PRS resource in the measurement result. For example, when the UE determines a PRS resource with the best signal quality measurement among multiple PRS resources mapped to / paired with the reference PRS resource as the paired PRS resource, the UE may also include information about the measured signal quality of the determined paired PRS resource in the measurement result and report the measurement result to the network.

[0246] Fig.13 is a diagram illustrating a method in which a network receives measurement information related to carrier phase measurement from a UE.

[0247] Reference Fig.13 , the network may send positioning configuration information related to phase measurement to the UE (S131). The positioning configuration information may also include information about a differential resource set, which includes information about a PRS resource in a paired relationship for eliminating timing errors. The positioning configuration information may be sent to the UE via system information sent via a cell-specific channel, or may be sent to the UE via auxiliary information sent by the LMF.

[0248] The differential resource set may include information about a plurality of PRS resources or PRS resource sets in a preset pairing relationship. For example, the differential resource set may include information about at least one PRS resource mapped to one PRS resource or paired with one PRS resource. For example, the differential resource set may include information about the first to Nth PRS resources and information about the mapping / pairing relationship of at least one PRS resource to which each of the first to Nth PRS resources is mapped / paired. The network may select a differential TRP suitable for performing phase measurement, and configure / define the PRS resource (or PRS resource set) corresponding to the TRP as a PRS resource with a mapping / pairing relationship. For example, the network may configure / determine a PRS resource suitable for eliminating a time error in phase measurement sent from different TRPs or transmitters as a mapping or pairing PRS resource in a differential resource set. Alternatively, the network may configure / determine the PRS resources between TRPs in an environment of similar integer ambiguity (e.g., TRPs where integer ambiguity may occur) as PRS resources mapped / paired with each other in a differential resource set. For example, where a phase variation of 360 degrees*n may occur in phase measurement, the network may map / pair TRPs that may occur with similar n values ​​to each other.

[0249] Next, the network may receive a measurement result including measurement information about the measured phase difference from the UE (S133).

[0250] Specifically, the network may receive measurement information (or measurement results) about the difference between the measured phases of two PRS resources in a paired relationship in the differential resource set included in the positioning configuration information from the UE. Alternatively, the network may send reference information for determining the reference PRS resource in the differential resource set to the UE. The reference information may include at least one of a reference PRS resource ID, a reference PRS resource set ID, or a reference TRP ID. The reference information may be information for indicating / configuring a PRS used as a reference (e.g., A as a reference in AB) when measuring a phase difference.

[0251] Alternatively, when the network does not provide reference information, the UE may expect that the PRS with the highest or lowest ID among the PRS resources (or PRS resource sets or TRPs) included in the differential resource set will be determined as the reference PRS resource. Alternatively, when the network does not provide reference information, the UE may expect that the PRS resource or PRS resource set corresponding to the TRP with the highest or lowest ID among the TRPs for the PRS resources included in the differential resource set will be determined as the reference PRS resource. When the network does not provide reference information, the UE may expect that the PRS with the best signal quality among the PRS resources included in the differential resource set will be determined as the reference PRS resource. Alternatively, when the network does not provide reference information, the network may expect that the UE will determine the reference TRP ID configured / indicated for the TDoA related to positioning as the reference TRP. In this case, the network may expect that the UE will report measurement information about the measured phase difference between the reference PRS resource and the paired PRS resource mapped to the reference PRS resource / paired with the reference PRS resource.

[0252] As described above, phase difference measurement based on reference PRS resource and paired PRS resource can be performed based on PRS received within a preset time window. The preset time window can be configured based on capability information received by the network from the UE (capability of the maximum time interval in which phase continuity and / or power consistency can be maintained in the UE).

[0253] Alternatively, the network may anticipate that when multiple PRS resources are paired with / mapped to a reference PRS resource (within a preset time window), the PRS resource with the highest measured signal quality among the multiple PRS resources will be determined as the paired PRS resource. In this case, the network may receive a measurement result including information about a phase difference measured based on the reference PRS resource and the paired PRS resource.

[0254] Alternatively, the network may receive a measurement result from the UE, the measurement result including information about the reference PRS resource (e.g., reference PRS resource ID) and / or information about the paired PRS resource (paired PRS resource ID) and the measurement information. For example, when the network does not indicate the reference PRS resource, the network may receive a measurement result, the measurement result also including the reference PRS resource ID directly determined based on the PRS resource ID and the ID of the paired PRS resource paired with the reference PRS resource. Alternatively, when the network indicates the reference PRS resource, the network may receive a measurement result, the measurement result also including information about the ID of the paired PRS resource mapped to / paired with the reference PRS resource.

[0255] Alternatively, the network may receive a measurement result further including information about the signal quality measurement of the paired PRS resource. For example, when the UE determines a PRS resource with the best signal quality measurement among a plurality of PRS resource blocks mapped to / paired with the reference PRS resource as the paired PRS resource, the network may receive a measurement result further including information about the signal quality measurement of the determined paired PRS resource.

[0256] The network may perform positioning (CPM or CPP) for the UE based on the phase difference included in the measurement result, or may perform positioning for the UE by considering the measurement result and measurement information from which the Tx error performed at the transmitting end is eliminated.

[0257] In this way, since a plurality of PRS resources suitable for differentiation are predefined / preconfigured, the UE can easily and quickly determine the PRS resources on which differentiation is to be performed. In addition, the network can clearly and quickly identify the PRS resources for which the phase difference included in the measurement information has been measured and reported based on the pairing relationship or mapping relationship. This analysis can effectively improve the positioning accuracy of the UE based on CPP or CPM.

[0258] Communication system example to which the present disclosure is applied

[0259] The various descriptions, functions, processes, proposals, methods and / or operational flowcharts of the present disclosure disclosed in this document may be applied to various fields requiring wireless communication / connection (5G) between devices, although not limited thereto.

[0260] Hereinafter, it will be illustrated in more detail with reference to the accompanying drawings.In the following drawings / descriptions, unless otherwise specified, the same reference numerals may illustrate the same or corresponding hardware blocks, software blocks or functional blocks.

[0261] Fig.14 A communication system 1 applied to the present disclosure is exemplified.

[0262] Reference Fig.14, the communication system 1 applied to the present disclosure includes a wireless device, a base station (BS), and a network. Herein, the wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G new RAT (NR) or long term evolution (LTE)), and may be referred to as a communication / radio / 5G device. The wireless device may include (but is not limited to) a robot 100a, vehicles 100b-1 and 100b-2, an extended reality (XR) device 100c, a handheld device 100d, a home appliance 100e, an Internet of Things (IoT) device 100f, and an artificial intelligence (AI) device / server 400. For example, a vehicle may include a vehicle with a wireless communication function, an autonomous driving vehicle, and a vehicle capable of performing communication between vehicles. Herein, a vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices, and may be implemented in the form of a head mounted device (HMD), a head up display (HUD) installed in a vehicle, a television, a smart phone, a computer, a wearable device, a home appliance device, a digital sign, a vehicle, a robot, etc. Handheld devices may include smart phones, smart boards, wearable devices (e.g., smart watches or smart glasses), and computers (e.g., notebooks). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors and smart meters. For example, a BS and a network may be implemented as wireless devices, and a specific wireless device 200a may operate as a BS / network node relative to other wireless devices.

[0263] The wireless devices 100a to 100f may be connected to the network 300 via the BS 200. The AI ​​technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI ​​server 400 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although the wireless devices 100a to 100f may communicate with each other via the BS 200 / network 300, the wireless devices 100a to 100f may perform direct communication (e.g., side link communication) with each other without passing through the BS / network. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). An IoT device (e.g., a sensor) may perform direct communication with other IoT devices (e.g., a sensor) or other wireless devices 100a to 100f.

[0264] Wireless communication / connection 150a, 150b or 150c may be established between wireless devices 100a to 100f / BS200 or BS200 / BS200. Herein, wireless communication / connection may be established through various RATs (e.g., 5G NR) such as uplink / DL communication 150a, sidelink communication 150b (or D2D communication) or inter-BS communication (e.g., relay, integrated access backhaul (IAB)). The wireless device and the BS / wireless device may send / receive radio signals to / from each other through wireless communication / connection 150a and 150b. For example, wireless communication / connection 150a and 150b may send / receive signals through various physical channels. To this end, at least a portion of various configuration information for configuring processes for sending / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes may be performed based on various proposals of the present disclosure.

[0265] Examples of wireless devices to which the present disclosure is applied

[0266] Fig.15 A wireless device suitable for the present disclosure is exemplified.

[0267] Reference Fig.15 , the first wireless device 100 and the second wireless device 200 may transmit radio signals through various RATs (e.g., LTE and NR). Herein, {the first wireless device 100 and the second wireless device 200} may correspond to Fig.14 {wireless device 100x and BS 200} and / or {wireless device 100x and wireless device 100x}.

[0268] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and further include one or more transceivers 106 and / or one or more antennas 108. The processor 102 may control the memory 104 and / or the transceiver 106, and may be configured to implement the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. For example, the processor 102 may process the information in the memory 104 to generate first information / signals, and then transmit a radio signal including the first information / signals through the transceiver 106. The processor 102 may receive a radio signal including second information / signals through the transceiver 106, and then store information obtained by processing the second information / signals in the memory 104. The memory 104 may be connected to the processor 102, and may store various information related to the operation of the processor 102. For example, the memory 104 may store software codes including commands for executing part or all of the processes controlled by the processor 102 or for executing the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. Herein, the processor 102 and the memory 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 106 may be connected to the processor 102 and transmit and / or receive radio signals through one or more antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. The transceiver 106 may be used interchangeably with a radio frequency (RF) unit. In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0269] According to an embodiment, the first wireless device 100 or UE may include a processor 102 and a memory 104 connected to an RF transceiver. The memory 104 may include a processor for executing the above-referenced Figures 11 to 13 At least one procedure of operations related to the described embodiments.

[0270] Specifically, the processor 102 can control the RF transceiver 106 to receive positioning configuration information from the network, the positioning configuration information including information about a differential resource set, the differential resource set including multiple PRS resources related to eliminating timing errors in carrier phase measurements, perform measurements based on the differential resource set, and report the measurement results to the network, the measurement results including a phase difference measured using two PRS resources in a paired relationship included in the differential resource set.

[0271] Alternatively, a chipset including the processor 102 and the memory 104 may be configured. In this case, the chipset may include at least one processor and at least one memory, the memory being operatively connected to the at least one processor and, when executed, causing the at least one processor to perform operations. These operations may include receiving positioning configuration information from a network, the positioning configuration information including information about a differential resource set, the differential resource set including a plurality of PRS resources related to eliminating a timing error in a carrier phase measurement, performing measurement based on the differential resource set, and reporting a measurement result to the network, the measurement result including a phase difference measured using two PRS resources in a paired relationship included in the differential resource set. In addition, the at least one processor may perform reference based on a program included in the memory. Figures 11 to 13 Describes the operation.

[0272] Alternatively, a computer-readable storage medium is provided, which includes at least one computer program that causes at least one processor to perform operations. These operations may include receiving positioning configuration information from a network, the positioning configuration information including information about a differential resource set, the differential resource set including a plurality of PRS resources related to eliminating a timing error in a carrier phase measurement, performing measurement based on the differential resource set, and reporting a measurement result to the network, the measurement result including a phase difference measured using two PRS resources in a paired relationship included in the differential resource set. In addition, the computer program may include a program that can be executed based on a reference to the program included in the memory. Figures 11 to 13 Describes the operation of the program.

[0273] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and further include one or more transceivers 206 and / or one or more antennas 208. The processor 202 may control the memory 204 and / or the transceiver 206, and may be configured to implement the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. For example, the processor 202 may process the information in the memory 204 to generate third information / signals, and then transmit a radio signal including the third information / signals through the transceiver 206. The processor 202 may receive a radio signal including fourth information / signals through the transceiver 206, and then store information obtained by processing the fourth information / signals in the memory 204. The memory 204 may be connected to the processor 202, and may store various information related to the operation of the processor 202. For example, the memory 204 may store software codes including commands for executing part or all of the processes controlled by the processor 202 or for executing the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. Herein, the processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 206 may be connected to the processor 202 and transmit and / or receive radio signals through one or more antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. The transceiver 206 may be used interchangeably with an RF unit. In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0274] According to an embodiment, the BS or the network may include a processor 202, a memory 204, and / or a transceiver 206. The processor 202 may control the transceiver 206 or the RF transceiver to send positioning configuration information to the UE, the positioning configuration information including information about a differential resource set including a plurality of PRS resources related to eliminating a timing error in carrier phase measurement, and receive measurement information from the UE, the measurement information including a phase difference measured using two PRS resources in a paired relationship included in the differential resource set.

[0275] In the following, the hardware elements of the wireless devices 100 and 200 will be described in more detail. One or more protocol layers may be implemented by (but not limited to) one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). One or more processors 102 and 202 may generate one or more protocol data units (PDUs) and / or one or more service data units (SDUs) according to the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document. One or more processors 102 and 202 may generate a signal (e.g., a baseband signal) including a PDU, SDU, message, control information, data, or information according to the description, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document, and provide the generated signal to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive a signal (e.g., a baseband signal) from one or more transceivers 106 and 206 and obtain the PDU, SDU, message, control information, data, or information according to the description, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document.

[0276] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. As an example, one or more application specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field programmable gate arrays (FPGAs) may be included in one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed in this document may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204 to be driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods and / or operational flow charts disclosed in this document may be implemented in the form of codes, commands and / or command sets using firmware or software.

[0277] One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, codes, instructions and / or commands. One or more memories 104 and 204 may be configured by read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard disk drive, register, cache memory, computer-readable storage medium and / or a combination thereof. One or more memories 104 and 204 may be located inside and / or outside of one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 by various technologies such as wired or wireless connections.

[0278] One or more transceivers 106 and 206 may send user data, control information and / or radio signals / channels mentioned in the method and / or operation flow chart of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information and / or radio signals / channels mentioned in the description, function, process, proposal, method and / or operation flow chart disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and send and receive radio signals. For example, one or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may send user data, control information or radio signals to one or more other devices. One or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may receive user data, control information or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to send and receive user data, control information and / or radio signals / channels mentioned in the description, functions, processes, proposals, methods and / or operation flow charts disclosed in this document through one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received radio signals / channels, etc. from RF band signals to baseband signals to process received user data, control information, radio signals / channels, etc. using one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc. processed using one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more of the transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0279] Application examples of wireless devices to which the present invention is applied

[0280] Fig.16 Another example of a wireless device applied to the present disclosure is illustrated.

[0281] Reference Fig.16 , the wireless devices 100 and 200 may correspond to Fig.15The wireless devices 100 and 200 of the present invention may be configured by various elements, components, units / parts and / or modules. For example, each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130 and an additional component 140. The communication unit may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include Fig.15 The one or more processors 102 and 202 and / or the one or more memories 104 and 204 of the present invention. For example, the transceiver 114 may include Fig.15 The control unit 120 is electrically connected to the communication unit 110, the storage unit 130, and the additional components 140, and controls the overall operation of the wireless device. For example, the control unit 120 may control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit 130. The control unit 120 may transmit information stored in the memory unit 130 to the outside (e.g., other communication devices) via the communication unit 110 through a wireless / wired interface, or store information received from the outside (e.g., other communication devices) via the communication unit 110 in the memory unit 130 through a wireless / wired interface.

[0282] The additional components 140 may be configured differently depending on the type of wireless device. For example, the additional components 140 may include at least one of a power supply unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device may be configured in the form of, but not limited to, a robot ( Fig.14 100a), vehicles ( Fig.14 100b-1 and 100b-2), XR devices ( Fig.14 100c), handheld device ( Fig.14 100d), household appliances ( Fig.14 100e), IoT devices ( Fig.14 100f), digital broadcasting terminal, holographic device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate / environmental device, AI server / device ( Fig.14 400), BS( Fig.14 200), network nodes, etc. The wireless device can be used in a mobile or fixed location according to the usage example / service.

[0283] exist Fig.16In the wireless devices 100 and 200, various elements, components, units / parts and / or modules in the wireless devices 100 and 200 may all be connected to each other through a wired interface, or at least a part thereof may be wirelessly connected through the communication unit 110. For example, in each of the wireless devices 100 and 200, the control unit 120 and the communication unit 110 may be wired, and the control unit 120 and the first unit (e.g., 130 and 140) may be wirelessly connected through the communication unit 110. The various elements, components, units / parts and / or modules within the wireless devices 100 and 200 may also include one or more elements. For example, the control unit 120 may be configured by a collection of one or more processors. As an example, the control unit 120 may be configured by a collection of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing unit and a memory control processor. As another example, the memory 130 may be configured by a random access memory (RAM), a dynamic RAM (DRAM), a read-only memory (ROM)), a flash memory, a volatile memory, a non-volatile memory and / or a combination thereof.

[0284] Here, the wireless communication technology implemented in the wireless device (XXX, YYY) of this specification may include LTE, NR and 6G in addition to narrowband Internet of Things for low-power communication. At this time, for example, NB-IoT technology may be an example of low-power wide area network (LPWAN) technology, and may be implemented according to standards such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the above names. Additionally or alternatively, the wireless communication technology implemented in the wireless device (XXX, YYY) of this specification may perform communication based on LTE-M technology. In this case, as an example, LTE-M technology may be an example of LPWAN technology, and may be referred to as various names such as eMTC (enhanced machine type communication). For example, LTE-M technology may be implemented according to at least one of various standards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-bandwidth limited), 5) LTE-MTC, 6) LTE machine type communication and / or 7) LTE M, and is not limited to the above names. Additionally or alternatively, in consideration of low power communication, the wireless communication technology implemented in the wireless device (XXX, YYY) of the present specification is at least one of ZigBee, Bluetooth, and a low power wide area network (LPWAN), and is not limited to the above names. As an example, ZigBee technology can generate a personal area network (PAN) related to small / low power digital communication based on various standards such as IEEE 802.15.4, and can be referred to as various names.

[0285] The above-mentioned embodiments are embodiments in which the components and features of the present disclosure are combined in a predetermined form. Unless otherwise explicitly stated, each component or feature should be considered as optional. Each component or feature can be implemented in a form that is not combined with other components or features. In addition, the embodiments of the present disclosure can also be constituted by combining some components and / or features. The order of the operations described in the embodiments of the present disclosure can be changed. Some configurations or features of an embodiment can be included in other embodiments, or can be replaced with corresponding configurations or features of other embodiments. Obviously, an embodiment can be constructed by combining claims that do not have a clear reference relationship in the claims, or can be included as a new claim by modifying after submission.

[0286] In this document, the embodiments of the present disclosure are described mainly based on the signal transmission / reception relationship between the terminal and the base station. Such a transmission / reception relationship is extended to the signal transmission / reception between the terminal and the repeater or between the base station and the repeater in the same / similar manner. In some cases, the specific operations described in this document as being performed by the base station can be performed by the node on it. That is, it is obvious that various operations performed in order to communicate with the terminal in a network including multiple network nodes containing the base station can be performed by the base station or by a network node other than the base station. The base station can be replaced by terms such as fixed station, node B, eNode B (eNB), access point, etc. In addition, the terminal can be replaced by terms such as user equipment (UE), mobile station (MS), mobile subscriber station (MSS).

[0287] In hardware configuration, the embodiments of the present disclosure may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, etc.

[0288] In firmware or software configuration, the method according to the embodiment of the present disclosure can be implemented in the form of modules, processes, functions, etc. The software code can be stored in a storage unit and executed by a processor. The memory is located inside or outside the processor and can send data to the processor and receive data from the processor via various known means.

[0289] As mentioned above, a detailed description of the preferred embodiments of the present disclosure has been given so that those skilled in the art can implement and perform the present disclosure. Although the preferred embodiments of the present disclosure have been referred to above, those skilled in the art will understand that various modifications and changes can be made to the present disclosure within the scope of the present disclosure.

[0290] Industrial Applicability

[0291] The above-mentioned embodiments of the present disclosure are applicable to various mobile communication systems.

Claims

1. A method for measuring a carrier phase by a user equipment UE in a wireless communication system, the method comprising: receiving positioning configuration information from the network; Performing measurements based on the positioning configuration information; as well as reporting the measurement results to the network, The positioning configuration information includes information about a differential resource set, the differential resource set includes a plurality of positioning reference signal PRS resources related to eliminating a timing error in a carrier phase measurement, and The measurement result includes a phase difference value measured using two PRS resources in a paired relationship included in the differential resource set.

2. The method according to claim 1, wherein: The measurement result includes a phase difference value between a reference PRS resource determined based on at least one of a reference PRS resource identifier ID, a reference PRS resource set ID or a reference transmission and reception point TRP ID indicated for the differential resource set and a paired PRS resource in the paired relationship with the reference PRS resource.

3. The method according to claim 2, wherein: The reference PRS resource and the paired PRS resource are associated with different TRPIDs.

4. The method according to claim 3, wherein: The reference TRP ID corresponds to the reference TRP ID configured for the time difference of arrival TDoA.

5. The method according to claim 2, wherein: Based on pairing the reference PRS resource with a plurality of PRS resources, the paired PRS resource is determined to be a PRS resource having the best measurement quality among the plurality of PRS resources.

6. The method according to claim 5, wherein: The measurement information further includes information about the measured quality of the paired PRS resources.

7. The method according to claim 1, wherein: The measurement information also includes information on the ID of the paired PRS resource.

8. The method according to claim 1, wherein: The positioning configuration information is received through system information.

9. The method according to claim 2, wherein: Based on the fact that the positioning configuration information does not configure a reference PRS resource, the UE determines a PRS resource with a highest PRS ID in the differential resource set as the reference PRS resource. 10 . A computer-readable recording medium recording a program for executing the method according to claim 1 .

11. A user equipment UE for measuring a carrier phase in a wireless communication system, the UE comprising: Radio frequency RF transceiver; as well as a processor connected to the RF transceiver, The processor controls the RF transceiver to receive positioning configuration information from a network, the positioning configuration information including information about a differential resource set, the differential resource set including multiple positioning reference signal PRS resources related to eliminating timing errors in carrier phase measurement, performs the measurement based on the positioning configuration information, and reports the measurement result to the network, the measurement result including a phase difference value measured using two PRS resources in a paired relationship included in the differential resource set.

12. The UE according to claim 11, wherein: The measurement result includes a phase difference value between a reference PRS resource determined based on at least one of a reference PRS resource identifier ID, a reference PRS resource set ID or a reference transmission and reception point TRP ID indicated for the differential resource set and a paired PRS resource in the paired relationship with the reference PRS resource.

13. A chipset for measuring carrier phase in a wireless communication system, the chipset comprising: at least one processor; as well as at least one memory operatively connected to the at least one processor and, when executed, causing the at least one processor to perform operations, The operations include: Receive positioning configuration information from a network, the positioning configuration information including information about a differential resource set, the differential resource set being used to eliminate a timing error in a carrier phase measurement, perform the measurement based on the positioning configuration information, and report a measurement result to the network, the measurement result including a phase difference value measured using two PRS resources in a paired relationship included in the differential resource set.

14. A method for receiving, by a network, measurement information related to measurement of a carrier phase from a user equipment UE in a wireless communication system, the method comprising: Sending positioning configuration information to the UE, the positioning configuration information including information about a differential resource set, the differential resource set including a plurality of positioning reference signal (PRS) resources related to eliminating a timing error in a carrier phase measurement; as well as Measurement information is received from the UE, where the measurement information includes a phase difference value measured using two PRS resources in a paired relationship included in the differential resource set.

15. A network for receiving measurement information related to measurement of a carrier phase from a user equipment UE in a wireless communication system, the network comprising: Radio frequency RF transceiver; as well as a processor connected to the RF transceiver, The processor controls the RF transceiver to send positioning configuration information to the UE, the positioning configuration information including information about a differential resource set, the differential resource set including multiple positioning reference signal PRS resources related to eliminating timing errors in carrier phase measurements; and receives measurement information from the UE, the measurement information including a phase difference value measured using two PRS resources in a paired relationship included in the differential resource set.

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