Method and apparatus for performing measurement by terminal in wireless communication system

Abstract

According to various embodiments, disclosed are a method and an apparatus by which a terminal performs a measurement in a wireless communication system, a method and an apparatus for the method, the method comprising the steps of: receiving configuration information, the configuration information comprises information about a plurality of positioning reference signal (PRS) resource sets and first priority information among the plurality of PRS resource sets; and performing a measurement for positioning in a PRS resource set having a high priority among the plurality of PRS resource sets based on the configuration information.

Description

Technical Field

[0001] This disclosure relates to a method and apparatus for locating a user equipment (UE) in a wireless communication system. Background Technology

[0002] Wireless communication systems are being widely deployed to provide various types of communication services such as voice and data. Typically, a wireless communication system is a multiple access system 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), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-Carrier Frequency Division Multiple Access (SC-FDMA), and Multi-Carrier Frequency Division Multiple Access (MC-FDMA).

[0003] As more and more communication devices require greater communication capacity when transmitting and receiving signals, there is a need for mobile broadband communications that are improved compared to traditional radio access technologies. Therefore, communication systems considering services / UEs that are sensitive to reliability and latency are being discussed. Next-generation radio access technologies that take into account enhanced mobile broadband communications, massive machine-type communications (MTC), and ultra-reliable and low-latency communications (URLLC) can be referred to as new radio access technologies (RAT) or new radio (NR). Summary of the Invention

[0004] Technical issues

[0005] One object of this disclosure is to provide a method for performing measurements for positioning more accurately and efficiently.

[0006] Those skilled in the art to which this embodiment pertains will understand that the objectives that can be achieved using this embodiment are not limited to the specific descriptions above, and that the above and other objectives will be more clearly understood from the following detailed description.

[0007] Technical solution

[0008] According to one aspect, a method for performing measurements by a user equipment (UE) in a wireless communication system may include: receiving configuration information including information about a plurality of positioning reference signal (PRS) resource sets and first priority information among the plurality of PRS resource sets; and performing a measurement for positioning in a PRS resource set having a higher priority among the plurality of PRS resource sets based on the configuration information, wherein the configuration information may further include information about PRS resource pairs included in at least one PRS resource set for carrier phase-based positioning (CPP) measurements and second priority information among the PRS resource pairs.

[0009] Based on the fact that the measurement used for positioning is a CPP measurement, the UE can determine that the highest priority is configured for at least one PRS resource set among multiple PRS resource sets, regardless of the first priority information.

[0010] Based on the fact that the measurement used for positioning is a CPP measurement, the UE can determine that the same specific priority is configured for at least one PRS resource set, regardless of the first priority information.

[0011] This configuration information may also include information about the time window associated with CPP measurements.

[0012] Since the measurement used for positioning is a CPP measurement, the UE can be configured with the highest priority for the PRS resource set in which the PRS is received within the time window among multiple PRS resource sets.

[0013] The measurement used for positioning can be a CPP measurement, and the CPP measurement can be performed only for one of the multiple PRS resource pairs determined based on the second priority information.

[0014] The method may also include reporting measurement information about the results of the performed measurements, and based on the fact that the measurements used for positioning are CPP measurements, the measurement information includes information about the phase difference between PRS received from a PRS resource pair.

[0015] Since the measurement used for positioning is not a CPP measurement, the measurement can be performed in the PRS resource set with the highest priority among multiple PRS resource sets based on the first priority information.

[0016] Each of the multiple PRS resource pairs may include two PRS resources associated with different Transmit and Receive Points (TRPs).

[0017] This configuration information can be sent to the network via a location-assisted data transmission process.

[0018] According to another aspect, a computer-readable recording medium may be provided containing a program for performing the method described above for the UE to perform CPP measurements.

[0019] According to another aspect, a UE can be provided for performing the measurements described above.

[0020] According to another aspect, a processing device for controlling a UE to perform the above measurements can be provided.

[0021] According to another aspect, a method for transmitting configuration information for carrier phase-based positioning (CPP) measurements by a network in a wireless communication system may include: transmitting configuration information including information about a plurality of positioning reference signal (PRS) resource sets and first priority information among the plurality of PRS resource sets; and receiving measurement information for performing measurements on a predetermined PRS resource set among the plurality of PRS resource sets based on the configuration information, wherein the configuration information may further include information about PRS resource pairs included in at least one PRS resource set for CPP measurements and second priority information among the PRS resource pairs.

[0022] According to another aspect, a network for transmitting the configuration information mentioned above for carrier phase-based positioning (CPP) measurements can be provided.

[0023] Beneficial effects

[0024] According to embodiments of this disclosure, measurements for positioning can be performed accurately and efficiently in a wireless communication system.

[0025] The effects achievable by this embodiment are not limited to those specifically described above, and those skilled in the art to which this embodiment pertains will gain a clearer understanding from the following detailed description of other effects not mentioned herein. Attached Figure Description

[0026] The accompanying drawings are included to provide a further understanding of the present disclosure, and these drawings are incorporated in and form a part of this application, illustrating embodiments of the present disclosure, and together with the description serve to explain the principles of the present disclosure.

[0027] Figure 1 This example illustrates the structure of an LTE system to which this implementation method is applicable.

[0028] Figure 2 The structure of an NR system to which this embodiment is applicable is illustrated.

[0029] Figure 3 The structure of an NR radio frame to which this embodiment is applicable is illustrated.

[0030] Figure 4 This example illustrates the time slot structure of an NR frame to which this implementation method is applicable.

[0031] Figure 5 This is a diagram illustrating a physical channel that can be used in an implementation and a signal transmission method using a physical channel.

[0032] Figure 6 This is a flowchart illustrating an example of a UL BM process using SRS.

[0033] Figure 7This is a diagram illustrating various implementation methods for locating user equipment (UE) using positioning protocol configurations.

[0034] Figure 8 Exemplary system architectures for measuring the location of a UE, applicable to various implementation methods, are illustrated.

[0035] Figure 9 An example implementation of a network for UE positioning is shown.

[0036] Figure 10 This is a diagram illustrating a protocol layer for supporting LTE Location Protocol (LPP) message transmission that can be implemented in various ways.

[0037] Figure 11 This is a diagram illustrating a protocol layer for supporting the transmission of Protocol Data Units (PDUs) of the NR Positioning Protocol (NRPPa) that can be implemented in various ways.

[0038] Figure 12 This is a diagram illustrating various implementation methods of Observation Time Difference of Arrival (OTDOA) positioning.

[0039] Figure 13 These are illustrations illustrating various scenarios related to wireless sensing via ISAC / JCAS.

[0040] Figure 14 This is a diagram used to explain the method by which the UE performs measurements for positioning.

[0041] Figure 15 This is a diagram illustrating a method for explaining the configuration information of measurements used for positioning provided by the network to the UE.

[0042] Figure 16 An example of a communication system applied to this disclosure is shown.

[0043] Figure 17 Examples of wireless devices applicable to this disclosure are provided.

[0044] Figure 18 Another example of a wireless device that applies the present disclosure is shown. Detailed Implementation

[0045] Multiple implementations are available for various wireless access technologies, such as Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA). CDMA can be implemented as a radio technology, such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented as a radio technology, such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rate GSM Evolution (EDGE). OFDMA can be implemented as a radio technology, such as IEEE 802.11 (Wireless Fidelity (Wi-Fi)), IEEE 802.16 (Global Microwave Access Interoperability (WiMAX)), IEEE 802.20, and Evolved UTRA (E-UTRA). UTRA is part of the Universal Mobile Telecommunications System (UMTS). The 3GPP Long Term Evolution (LTE) is part of the Evolved UMTS using E-UTRA (E-UMTS), and LTE-Advanced (LTE-A) is an evolution of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolution of 3GPP LTE / LTE-A.

[0046] Sidelinks refer to communication schemes that establish direct links between user equipment (UEs) to enable direct exchange of voice or data between UEs without assistance from a base station (BS). Sidelinks are considered a way to address the burden on the BS caused by rapidly increasing data traffic.

[0047] Vehicle-to-Everything (V2X) refers to a communication technology that exchanges information with other vehicles, pedestrians, and infrastructure entities via 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 interfaces and / or Uu interfaces.

[0048] As more and more communication devices require greater communication capacity when sending and receiving signals, there is a need for improved mobile broadband communications compared to traditional radio access technologies. Therefore, communication systems considering service / UE sensitivity to reliability and latency are being discussed. Next-generation radio access technologies that incorporate enhanced mobile broadband communications, massive MTC, and ultra-reliable and low-latency communications (URLLC) can be referred to as new radio access technologies (RAT) or new radio (NR). Even within NR, V2X communication can be supported.

[0049] The technologies described in this article can be used in various radio access systems such as Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA). CDMA can be implemented as radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented as radio technologies such as Global System for Mobile Communications (GSM), General Packet Radio Service (GPRS), and Enhanced Data Rate for GSM Evolution (EDGE). OFDMA can be implemented as radio technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, and Evolved UTRA (E-UTRA). IEEE 802.16m is an evolution of IEEE 802.16e, providing backward compatibility with IRRR 802.16e-based systems. UTRA is part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long Term Evolution (LTE) is part of Evolved UMTS (E-UMTS) which uses Evolved UTRA (E-UTRA). 3GPP LTE uses OFDMA for downlink (DL) and SC-FDMA for uplink (UL). LTE Advanced (LTE-A) is an evolution of 3GPP LTE.

[0050] 5G NR is the successor to LTE-A and is a new type of 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 and above.

[0051] For clarity, the description primarily focuses on LTE-A or 5G NR, but the technical spirit of the implementation is not limited thereto.

[0052] Figure 1 The structure of an LTE system according to an embodiment of this 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.

[0053] Reference Figure 1E-UTRAN includes an evolved Node B (eNB) 20 that provides the control plane and user plane to UE 10. UE 10 can be fixed or mobile and can also be referred to as a mobile station (MS), user terminal (UT), subscriber station (SS), mobile terminal (MT), or radio device. eNB 20 is a fixed station that communicates with UE 10 and can also be referred to as a base station (BS), base transceiver system (BTS), or access point.

[0054] The eNB 20 can connect to each other via the X2 interface. The eNB 20 connects to the evolved packet core (EPC) 39 via the S1 interface. More specifically, the eNB 20 connects to the mobility management entity (MME) via the S1-MME interface and to the serving gateway (S-GW) via the S1-U interface.

[0055] EPC 30 includes an MME, an S-GW, and a Packet Data Network Gateway (P-GW). The MME contains access or capability information about the UE and is primarily used for UE mobility management. The S-GW is a gateway with E-UTRAN as its endpoint, and the P-GW is a gateway with Packet Data Network (PDN) as its endpoint.

[0056] Based on the lowest three layers of the Open Systems 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 delivery services on the physical channel. 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.

[0057] Figure 2 The structure of an NR system is illustrated.

[0058] Reference Figure 2 Next-generation radio access networks (NG-RAN) can include next-generation Node Bs (gNBs) and / or eNBs that provide user plane and control plane protocols to UEs. Figure 2 In this example, NG-RAN is shown as consisting only of gNBs. gNBs and eNBs are connected to each other via the Xn interface. gNBs and eNBs are connected to the 5G core network (5GC) via the NG interface. More specifically, gNBs and eNBs are connected to the Access and Mobility Management Function (AMF) via the NG-C interface and to the User Plane Function (UPF) via the NG-U interface.

[0059] Figure 3An example of a radio frame structure in an NR to which embodiments of the present disclosure are applicable is illustrated.

[0060] Reference Figure 3 Radio frames can be used for UL and DL transmissions in NR. A radio frame is 10 ms long and can be defined by two 5 ms half-frames. HF can include five 1 ms subframes. Subframes can be divided into one or more time slots, and the number of time slots in SF can be determined based on the subcarrier spacing (SCS). Each time slot can include 12 or 14 OFDM (A) symbols depending on the cyclic prefix (CP).

[0061] In the normal CP (NCP) scenario, each time slot can include 14 symbols, while in the extended CP (ECP) scenario, each time slot can include 12 symbols. In this paper, symbols can be OFDM symbols (or CP-OFDM symbols) or SC-FDMA symbols (or DFT-s-OFDM symbols).

[0062] Table 1 below lists the number of symbols N for each slot in the SCS configuration of μ under NCP conditions. 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 .

[0063] [Table 1]

[0064] Table 2 below lists the number of symbols in each slot of the SCS, the number of slots per frame, and the number of slots in each subframe under the ECP case.

[0065] [Table 2]

[0066] In NR systems, different OFDM(A) parameter sets (e.g., SCS, CP length, etc.) can be configured for multiple cells aggregated for a single UE. Therefore, the (absolute time) duration of time resources (e.g., subframes, time slots, or TTIs) comprising the same number of symbols (collectively referred to as Time Units (TUs) for convenience) can be configured to be different for the aggregated cells. NR can support various parameter sets or SCSs to support a wide range of 5G services. For example, a 15 kHz SCS can support wide areas in traditional cellular bands, while a 30 kHz / 60 kHz SCS can support dense urban areas, lower latency, and wider carrier bandwidth. Using a 60 kHz or higher SCS can support bandwidths greater than 24.25 GHz to overcome phase noise.

[0067] NR bands can be defined by two types of frequency ranges, FR1 and FR2. The values ​​within each frequency range can vary. For example, the two types of frequency ranges can be given in Table 3. In an NR system, FR1 can be a "range below 6 GHz," and FR2 can be a "range above 6 GHz," referred to as millimeter wave (mmW).

[0068] [Table 3]

[0069] As mentioned above, the values ​​within the frequency range can be varied in NR systems. 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 higher. For example, frequency bands of 6 GHz (or 5850, 5900, and 5925 MHz) or higher can include unlicensed frequency bands. Unlicensed frequency bands can be used for various purposes, such as vehicle communications (e.g., autonomous driving).

[0070] [Table 4]

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

[0072] Reference Figure 4 A time slot comprises 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 comprises multiple subcarriers in the frequency domain. An RB can be defined by multiple (e.g., 12) consecutive subcarriers in the frequency domain. A bandwidth portion (BWP) can be defined by multiple consecutive (physical) RBs ((P)RBs) in the frequency domain and corresponds to a set of parameters (e.g., SCS, CP length, etc.). A carrier can include up to N (e.g., 5) BWPs. Data communication can be performed within an active BWP. Individual elements can be referred to as resource elements (REs) in a resource grid, and a complex symbol can be mapped to an RE.

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

[0075] Bandwidth Component (BWP)

[0076] In NR systems, individual component carriers (CCs) can support up to 400 MHz. If a UE operating on a wideband CC always utilizes RF operation against all enabled CCs, the UE's battery power consumption may increase. Alternatively, considering various use cases operating within a wideband CC (e.g., eMBB, URLLC, mMTC, V2X, etc.), different sets of parameters (e.g., subcarrier spacing) can be supported for different frequency bands within a specific CC. Alternatively, the capability for the maximum bandwidth can differ between UEs. With this in mind, the BS can instruct the UE to operate only in a portion of the bandwidth, rather than the entire bandwidth of the wideband CC. For simplicity, a portion of the bandwidth is defined as a bandwidth portion (BWP). Here, the BWP can consist of contiguous resource blocks (RBs) on the frequency axis and can correspond to a set of parameters (e.g., subcarrier spacing, CP length, time slot / hourly time slot duration).

[0077] The BS can configure multiple BWPs within a single CC configured for a UE. For example, a BWP occupying a relatively small frequency domain can be configured in a PDCCH monitoring slot, and the PDSCH indicated by the PDCCH in a larger BWP can be scheduled. Alternatively, when UEs are concentrated in a specific BWP, some UEs can be configured in another BWP to achieve load balancing. Alternatively, considering the cancellation of inter-cell interference in the frequency domain between neighboring cells, the spectrum in the middle of the entire bandwidth can be pruned, and two BWPs on either side can be configured in the same time slot. That is, the BS can configure at least one DL / UL BWP for a UE associated with a broadband CC (via 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 can instruct the UE to switch to another configured DL / UL BWP (via L1 signaling, MAC CE, or RRC signaling, etc.). Alternatively, when a timer expires, the UE can switch to a predetermined DL / UL BWP. The activated DL / UL BWP is defined as the active 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. In this case, the UE assumes that the DL / UL BWP is the initially activated DL / UL BWP.

[0078] Figure 5 This is a diagram illustrating physical channels that can be used in various implementations and signal transmission methods using physical channels.

[0079] Reference Figure 5 In step S11, when power is turned on or when the UE initially enters a 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 obtains information such as the cell identifier (ID) based on the PSS / SSS. The UE can then receive broadcast information from the cell on the PBCH. Furthermore, during the initial cell search, the UE can also check the downlink channel state by receiving a downlink reference signal (DLRS).

[0080] In step S12, after the initial cell search, the UE can obtain more specific system information by receiving the Physical Downlink Control Channel (PDCCH) and the Physical Downlink Shared Channel (PDSCH) based on the PDCCH information.

[0081] Subsequently, to complete the connection to the eNB, the UE can perform a random access procedure with the eNB (S13 to S16). During the random access procedure, the UE can transmit a preamble on the Physical Random Access Channel (PRACH) (S13) and receive a Random Access Response (RAR) for the preamble on the PDCCH and the PDSCH associated with the PDCCH (S14). The UE can transmit the Physical Uplink Shared Channel (PUSCH) using the scheduling information in the RAR (S15) and perform a contention resolution procedure for receiving the PDCCH signal and the corresponding PDSCH 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 transmission operation (e.g., transmitting message A (MsgA) including PRACH preamble and / or PUSCH), and steps S14 and S16 can be performed as a BS transmission operation (e.g., transmitting message B (MsgB) including RAR and / or contention resolution information).

[0083] Following the above process, during the general UL / DL signal transmission process, the UE can receive PDCCH and / or PDSCH from the BS (S17) and send PUSCH and / or 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-acknowledge / negative-acknowledge (HARQ-ACK / NACK), scheduling request (SR), channel quality indicator (CQI), precoding matrix index (PMI), rank indicator (RI), etc.

[0085] Typically, UCIs are sent periodically on the PUCCH. However, if control information and service data should be sent simultaneously, they can be sent on the PUSCH. Additionally, UCIs can be sent non-periodically on the PUSCH when a request / command is received from the network.

[0086] Detection process

[0087] Figure 6 This is a flowchart illustrating an example of a UL BM process using SRS.

[0088] Reference Figure 6In a UL BM, depending on the UE implementation, beam reciprocity (or beam correspondence) between the Tx and Rx beams may or may not be established. When reciprocity between the Tx and Rx beams is established in both the BS and the UE, the UL beam pair can be aligned using the DL beam pair. However, when reciprocity between the Tx and Rx beams is not established in either the BS or the UE, a separate UL beam pair determination process may be required, distinct from the DL beam pair determination process.

[0089] The UE can receive RRC signaling (e.g., SRS-Config IE) (S1010) that includes usage parameters (higher-layer parameters) configured for "beam management".

[0090] The UE can determine the Tx beam of the SRS resource to be transmitted based on the SRS-SpatialRelation Info included in the SRS-Config IE (S1020). Here, the SRS-SpatialRelation Info can be configured for each SRS resource and can indicate whether the same beam used in the SSB, CSI-RS, or SRS is applied for each SRS resource. Furthermore, the SRS-SpatialRelation Info can be configured in each SRS resource or not. When the SRS-SpatialRelation Info is configured in the SRS resource, the same beam used in the SSB, CSI-RS, or SRS can be applied and transmitted. However, when the SRS-SpatialRelation Info is not configured for the SRS resource, the UE can arbitrarily determine the Tx beam and can transmit SRS using the determined Tx beam (S1030).

[0091] More specifically, for P-SRS where "SRS-ResourceConfigType" is configured "periodically": i) When SRS-SpatialRelationInfo is configured as "SSB / PBCH", the UE can apply the same spatial domain transmit filter (or a spatial domain transmit filter generated from the corresponding filter) as the spatial domain Rx filter used to receive SSB / PBCH, and can transmit the corresponding SRS resources; or ii) When SRS-SpatialRelationInfo is configured as "CSI-RS", the UE can apply the same spatial domain transmit filter as the filter used to receive periodic CSI-RS or SP CSI-RS, and can transmit SRS resources; or iii) When SRS-SpatialRelationInfo is configured as “SRS”, the UE can apply the same spatial domain transmission filter as the filter used to transmit periodic SRS and can transmit the corresponding SRS resources.

[0092] Even when “SRS-ResourceConfigType” is configured as “SP-SRS” or “AP-SRS”, beamforming and transmission operations can be applied in a similar manner to those described above.

[0093] - Additionally, the UE may or may not receive feedback to the SRS from the BS, as in the following three cases (S1040).

[0094] i) When Spatial_Relation_Info is configured for all SRS resources in the SRS resource set, the UE can transmit SRS in the beam indicated by the BS. For example, when Spatial_Relation_Info all indicate the same SSB, CRI, or SRI, the UE can repeatedly transmit SRS in the same beam.

[0095] ii) Spatial_Relation_Info may not be configured for all SRS resources in the SRS resource set. In this case, the UE can freely perform transmissions while changing the SRS beam.

[0096] iii) Spatial_Relation_Info can be configured only for some SRS resources in the SRS resource set. In this case, for the configured SRS resources, SRS can be transmitted in the indicated beam, while for the SRS resources without Spatial_Relation_Info configured, the UE can arbitrarily apply the Tx beam to perform the transmission.

[0097] DCI format 0_0 or 0_1 can be used for uplink scheduling, and specifically, DCI format 0_1 ​​can include the following information: - Identifiers in DCI format, UL / SUL (Supplementary Uplink) indicator (UL / SUL indicator), bandwidth portion indicator, frequency domain resource allocation, time domain resource allocation, frequency hopping flag, MCS (Modulation and Coding Scheme), SRI (SRS Resource Indicator), precoding information and layer number, antenna port, SRS request, DMRS sequence initialization, and UL-SCH (Uplink Shared Channel) indicator (UL-SCH indicator).

[0098] Specifically, SRS resources configured in the SRS resource set related to the high-level parameter "usage" can be indicated by the SRS resource indicator field. Furthermore, "spatialRelationInfo" can be configured for each SRS resource, and its value can be one of {CRI, SSB, and SRI}.

[0099] When a PDCCH containing DCI format 0_0 or 0_1 is detected, the UE can send the corresponding PUSCH according to the indication of the corresponding DCI.

[0100] For PUSCH transmission, two transmission schemes are supported: codebook-based transmission and non-codebook-based transmission. i) When the higher-layer parameter "txConfig" is set to "codebook", the UE is configured for codebook-based transmission. Conversely, when the higher-layer parameter "txConfig" is set to "non-codebook", the UE is configured for non-codebook-based transmission. When the higher-layer parameter "txConfig" is not set, the UE may not expect scheduling via DCI format 0_1. When PUSCH is scheduled according to DCI format 0_0, PUSCH transmission can be based on a single antenna port.

[0101] In the case of codebook-based transmission, PUSCH can be scheduled via DCI format 0_0, DCI format 0_1, or semi-statically. When scheduling PUSCH via DCI format 0_1, the UE can determine the PUSCH transmission precoder based on the SRI, TPMI (Transmission Precoding Matrix Indicator), and transmission rank from the DCI, as given by the SRS Resource Indicator field, precoding information, and layer digital segment. TPMI can be used to indicate the precoder to be applied across antenna ports and, when multiple SRS resources are configured, can correspond to the SRS resource selected by the SRI. Alternatively, when a single SRS resource is configured, TPMI can be used to indicate the precoder to be applied across antenna ports and can correspond to that single SRS resource. Transmission precoders can be selected from uplink codebooks with the same number of antenna ports as the higher-layer parameter "nrofSRS-Ports". When the higher-layer configuration of a UE that is set to "codebook" has the parameter "txConfig", the UE can be configured with at least one SRS resource. The SRI indicated in slot n can be associated with the most recent transmission of the SRS resource identified by the SRI, and here, the SRS resource can precede the PDCCH carrying the SRI (i.e., slot n).

[0102] ii) In the case of non-codebook-based transmission, PUSCH can be scheduled using DCI format 0_0, DCI format 0_1, or semi-statically. When multiple SRS resources are configured, the UE can determine the PUSCH precoder and transmission rank based on the wideband SRI, where the SRI can be given by the SRS resource indicator in the DCI or by the higher-layer parameter "srs-ResourceIndicator". The UE can use one or more SRS resources for SRS transmission, and the number of SRS resources for simultaneous transmission within the same RB can be configured based on the UE's capabilities. Each SRS resource can be configured with only one SRS port. The higher-layer parameter "usage" set to "nonCodebook" can be configured with only one SRS resource. The maximum number of SRS resources configured for non-codebook-based uplink transmission can be 4. The SRI indicated in slot n can be associated with the most recent transmission of the SRS resource identified by the SRI, and here, SRS transmission can precede the PDCCH carrying the SRI (i.e., slot n).

[0103] Figure 7 This is a diagram illustrating an exemplary positioning protocol configuration applicable to the implementation method for locating a UE.

[0104] Reference Figure 7 The 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) to locate the target device using location-related measurements obtained from one or more reference resources. The target device and the location server can exchange measurement and / or location information based on signal A and / or signal B on the LPP.

[0105] NRPPa can be used for information exchange between reference sources (access nodes and / or BS and / or TP and / or NG-RAN nodes) and location servers.

[0106] The NRPPa protocol can provide the following functions.

[0107] - E-CID location information transmission. This function allows the reference source to exchange location information with the LMF for E-CID positioning purposes.

[0108] - OTDOA information transmission. This function allows the reference source to exchange information with the LMF for OTDOA positioning purposes.

[0109] - General Error Case Report. This feature allows you to report general error cases where no function-specific error message is defined.

[0110] PRS (Positioning Reference Signal)

[0111] For this type of positioning, a Positioning Reference Signal (PRS) can be used. The PRS is a reference signal used to estimate the position of the UE.

[0112] The positioning frequency layer may include one or more PRS resource sets, each PRS resource set including one or more PRS resources.

[0113] Sequence generation

[0114] PRS sequence It can be defined by Equation 1.

[0115] [Formula 1]

[0116] In Equation 1, c(i) can be a pseudo-random sequence. The pseudo-random sequence generator can be initialized using Equation 2.

[0117] [Equation 2] This can be the slot number in the frame within the SCS configuration μ. DL PRS Sequence ID This can be given by higher-level parameters (e.g., DL PRS SequenceID). l can be the OFDM symbol in the time slot to which the sequence is mapped.

[0118] Mapping to physical resources in DL PRS resources

[0119] Specifically, through Equation 3, the PRS sequence It can be by Scaling and mapping to RE . RE(k, l) can represent the antenna port p and SCS configuration μ.

[0120] [Formula 3]

[0121] In this paper, the following conditions must be met: - RE Included in the RB occupied by the DL PRS resources configured for the UE; - The symbol l is not used by any SS / PBCH block of the serving cell 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. - The slot number meets the following PRS resource set related conditions; This is the first symbol of the DL PRS in the time slot, which can be given by the higher-level parameter DL-PRS-ResourceSymbolOffset. The time-domain size of the DL PRS resource. This can be given by the high-level parameter DL-PRS-NumSymbols. Comb size. It can be given by the high-level parameter transmissionComb. and combination 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 This can be given by combOffset. Frequency offset. It can be as shown in Table 5 The function.

[0122] [Table 5]

[0123] The reference point for k=0 can be the location of point A within the positioning frequency layer where the DL PRS resource is configured. Point A can be given by the higher-level parameter dl-PRS-PointA-r16.

[0124] Mapping to time slots in the DL PRS resource set

[0125] DL PRS resources included in the DL PRS resource set can be transmitted in time slots and frames that satisfy Equation 4 below.

[0126] [Formula 4] It can be the number of time slots per frame in the SCS configuration μ. It can be the system frame number (SFN). This can be the slot number in the frame within the SCS configuration μ. Slot offset. It can be determined by high-level parameters DL-PRS- ResourceSetSlotOffset Provided. DL PRS resource slot offset It can be determined by high-level parameters DL-PRS- ResourceSlotOffset Given. Period. It can be determined by high-level parameters DL-PRS-Periodicity Given. Repetition factor. It can be determined by high-level parameters DL-PRS- ResourceRepetitionFactor Given the silent repetition factor. It can be determined by high-level parameters DL-PRS- MutingBitRepetitionFactor Provided. Time gap. It can be determined by high-level parameters DL-PRS- ResourceTimeGap Provided.

[0127] UE positioning architecture

[0128] Figure 8 An exemplary system architecture for measuring the positioning of a UE, applicable to various implementations, is illustrated.

[0129] Reference Figure 8 The AMF can 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 can decide to initiate location services on behalf of a specific target UE. The AMF then sends the location service request to the Location Management Function (LMF). Upon receiving the request, the LMF can process it and return the processing result, including the estimated location of the UE, to the AMF. In cases where the location service is requested by an entity other than the AMF, such as a GMLC, the AMF can send the processing result received from the LMF to that entity.

[0130] Next-generation evolved NBs (ng-eNBs) and gNBs are NG-RAN network elements capable of providing measurement results for positioning. ng-eNBs and gNBs can measure radio signals for a target UE and transmit the measurement results to the LMF. ng-eNBs can control TPs such as radio remotely pulling several TPs or only PRS TPs to support E-UTRA PRS-based beacon systems.

[0131] The LMF connects to the Enhanced Serving Mobility Location Center (E-SMLC), which enables the LMF to access the E-UTRAN. For example, the E-SMLC allows the LMF to support OTDOA using DL measurements obtained by the target UE through the eNB and / or the TP of the PRS only in the E-UTRAN. OTDOA is one of the positioning methods of the E-UTRAN.

[0132] The Location Provider (LMF) can connect to the Secure User Plane Location Platform (SLP). The LMF can support and manage different location services for a target UE. The LMF can interact with the target UE's serving ng-eNB or serving gNB to obtain location measurements for the UE. For the target UE's positioning, the LMF can determine the positioning method 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 can determine additional information such as the accuracy of location estimation and the target UE's speed. The SLP is the Secure User Plane Location (SUPL) entity responsible for positioning on the user plane.

[0133] The UE can use DL RS transmitted by NG-RAN and E-UTRAN to measure its location. DL RS transmitted from NG-RAN and E-UTRAN to the UE may include SS / PBCH blocks, CSI-RS, and / or PRS. The choice of which DL RS to use to measure the UE's location may follow the configuration of LMF / E-SMLC / ng-eNB / E-UTRAN, etc. The UE's location can be measured using a RAT-independent scheme using different Global Navigation Satellite Systems (GNSS), Terrestrial Beacon Systems (TBS), WLAN access points, Bluetooth beacons, and sensors installed in the UE (e.g., barometric pressure sensors). The UE may also include an LCS application or access an LCS application by communicating with the network it accesses or through another application it includes. The LCS application may include the measurement and computation functions required to determine the UE's location. For example, the UE may include independent positioning capabilities such as Global Positioning System (GPS) and report its location independently of NG-RAN transmissions. This independently acquired positioning information can be used as supplementary information to positioning information obtained from the network.

[0134] Operations for UE positioning

[0135] Figure 9 An example implementation of a network for UE positioning is shown.

[0136] When the AMF receives a request for location services while the UE is in the Connection Management (CM) - Idle state, the AMF can request network-triggered services to establish a signaling connection with the UE and assign a specific service gNB or ng-eNB. Figure 8 This operation process has been omitted. In other words, in Figure 9 In this context, it can be assumed that the UE is in connected mode. However, while the positioning process is still in progress, the NG-RAN can release the signaling connection as a result of signaling and data inactivity.

[0137] Now refer to Figure 9 The network operation process used for UE location is described in detail. In step 1a, a 5GC entity such as a GMLC can send a request to the serving AMF for location services to measure the location of the target UE. Here, even if the GMLC does not request location services, the serving AMF can determine, according to step 1b, that location services are needed to measure the location of the target UE. For example, the serving AMF can determine that it itself will perform location services to measure the UE's location for an emergency call.

[0138] 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 auxiliary data. For example, the LMF may send a request to the NG-RAN for location-related information associated with one or more UEs, indicating the type of location information and associated QoS. The NG-RAN may then respond to the request by transmitting the location-related information to the LMF. In this case, when the requested location determination method is the 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 estimation information and radio or location measurements. The protocol used in step 3a may be the NRPPa protocol, which will be described later.

[0139] Additionally, in step 3b, the LMF can initiate a location procedure for DL ​​positioning together with the UE. For example, the LMF can send location assistance data to the UE or obtain location estimates or location measurements. For example, in step 3b, a capability information transmission procedure can be performed. Specifically, the LMF can send a request for capability information to the UE, and the UE can send capability information to the LMF. Here, capability information may include information about positioning methods that can be supported by the LMF 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 characteristics not specific to any one positioning method (such as the ability to handle multiple LPP transactions). In some cases, the UE may provide capability information to the LMF even if the LMF does not send a request for capability information.

[0140] As another example, in step 3b, a location assistance data transmission procedure can be performed. Specifically, the UE can send a request for location assistance data to the LMF and indicate to the LMF the specific location assistance data required. The LMF can then transmit the corresponding location assistance data to the UE in one or more Additional LTE Positioning Protocol (LPP) messages, and also transmit additional assistance data to the UE. The location assistance data transmitted from the LMF to the UE can be sent via unicast. In some cases, the LMF can transmit location assistance data and / or additional assistance data to the UE without receiving a request for assistance data from the UE.

[0141] As another example, in step 3b, a location-assisted data transmission procedure can be performed. Specifically, the LMF can send a request to the UE for location (related) information associated with the UE, indicating the type of location information required and the associated QoS. In response to this request, the UE can transmit location-related information to the LMF. Additionally, the UE can transmit additional location-related information to the LMF in one or more LPP messages. Here, "location-related information" can refer to all values ​​used for location calculation, such as actual location estimation information and radio measurements or location measurements. Typically, location-related information can be a reference signal time difference (RSTD) value measured by the UE based on DL RSs sent to the UE by multiple NG-RAN and / or E-UTRANs. Similar to the above description, the UE can transmit location-related information to the LMF without receiving a request from the LMF.

[0142] The procedures performed in step 3b can be executed independently or sequentially. While step 3b is typically executed in the order of capability information transmission, location-aided data transmission, and location information transmission, it is not limited to this order. In other words, step 3b does not need to occur in a specific order to facilitate greater positioning flexibility. For example, the UE can request location-aided data at any time to fulfill a previous request for location measurements made by the LMF. The LMF can also request location information such as location measurements or location estimates at any time if the location information sent by the UE does not meet the required QoS. Similarly, the UE can send capability information to the LMF at any time when it is not performing measurements for location estimation.

[0143] In step 3b, when the information or request exchanged between the LMF and the UE is incorrect, error messages can be sent and received, and abort messages for terminating positioning can be sent and received.

[0144] The protocol used in step 3b can be the LPP protocol, which will be described later.

[0145] Step 3b can be performed separately after step 3a, or it can be performed in place of step 3a.

[0146] In step 4, the LMF can provide a location service response to the AMF. The location service response may include information about whether the UE's location was successful, and includes an estimated location value for the UE. If Figure 9 The process has already been initiated by step 1a, then the AMF can transmit the location service response to a 5GC entity such as the GMLC. If Figure 9 If the process has been initiated by step 1b, the AMF can use the location service response to provide location services related to the emergency call.

[0147] LTE Location Protocol (LPP)

[0148] Figure 10 An exemplary protocol layer for supporting LPP message transmission between the LMF and the UE is illustrated. The LPP Protocol Data Unit (PDU) can be carried in a NAS PDU between the AMF and the UE.

[0149] Reference Figure 10 LPP terminates between the target device (e.g., a UE in the control plane or a SUPL-enabled terminal (SET) in the user plane) and the location server (e.g., an LMF in the control plane or an SLP in the user plane). LPP messages can be carried as transparent PDUs across intermediate network interfaces using appropriate protocols (e.g., NGAP via the NG-C interface and NAS / RRC via the LTE-Uu and NR-Uu interfaces). LPP aims to enable NR and LTE positioning using various positioning methods.

[0150] For example, the target device and the location server can exchange capability information, auxiliary data for positioning, and / or location information between them via LPP. The target device and the location server can also exchange error information and / or indicate the termination of the LPP process via LPP messages.

[0151] NR Positioning Protocol A (NRPPa)

[0152] Figure 11 An exemplary protocol layer is illustrated for supporting the transfer of NRPPa PDUs between LMF and NG-RAN nodes.

[0153] NRPPa can be used to carry information between NG-RAN nodes and LMFs. Specifically, NRPPa can carry E-CID for measurement, data to support the OTDOA positioning method, and cell ID and cell location ID to support the NR cell ID positioning method, transmitted from the ng-eNB to the LMF. The AMF can route NRPPa PDUs via the NG-C interface based on the routing ID of the involved LMF without information about the related NRPPa transactions.

[0154] NRPPa procedures for location and data collection can be divided into two types. The first type is a UE association procedure for transmitting information about a specific UE (e.g., location measurement information), and the second type is a non-UE association 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.

[0155] Positioning measurement method

[0156] The positioning methods supported in NG-RAN can include GNSS, OTDOA, E-CID, barometric pressure sensor positioning, WLAN positioning, Bluetooth positioning, TBS, uplink time difference of arrival (UTDOA), etc. Although any one of the positioning methods can be used for UE positioning, two or more positioning methods can be used for UE positioning.

[0157] OTDOA (Observed Time Difference of Arrival)

[0158] Figure 12 This is a diagram illustrating an observation time difference of arrival (OTDOA) positioning method applicable to the implementation method.

[0159] The OTDOA positioning method uses time measured by the UE from multiple TPs, including eNB, ng-eNB, and PRS-only TPs. The UE uses location-aided data received from a location server to measure the time of the received DL signals. The UE's location can be determined based on these measurements and the geographic coordinates of neighboring TPs.

[0160] A UE connected to a gNB can request a measurement gap from a TP to perform OTDOA measurements. If the UE does not know the SFN of at least one TP in the OTDOA auxiliary data, the UE can use an autonomous gap to obtain the SFN of the OTDOA reference cell before requesting a measurement gap for performing Reference Signal Time Difference (RSTD) measurements.

[0161] Here, RSTD can be defined as the minimum relative time difference between the boundaries of two subframes received from the reference cell and the measurement cell. That is, RSTD can be calculated as the relative time difference between the start time of a 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 can be selected by the UE.

[0162] For accurate OTDOA measurement, it is necessary to measure the Time of Arrival (ToA) of signals received from three or more geographically distributed TPs or BSs. 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 can be calculated based on the three ToA values. The calculated RSTD values ​​determine the geometric hyperbola, and the point where the hyperbola intersects can be estimated as the UE's location. In this case, the accuracy and / or uncertainty of the individual ToA measurements may arise, and depending on the measurement uncertainty, the estimated location of the UE may be referred to as a specific range.

[0163] For example, the RSTD of two TPs can be calculated based on Equation 5 below.

[0164] [Formula 5]

[0165] In Equation 5, c is the speed of light, {x t , y t} represents the (unknown) coordinates of the target UE, {x i , y i {x1, y1} are the (known) coordinates of TP, and {x1, y1} are the coordinates of a reference TP (or another TP). Here, (T i -T1) is the transmission time offset between two TPs, called the "real-time difference" (RTD), and n i n1 and n2 are the UE ToA measurement error values.

[0166] E-CID (Enhanced Cell ID)

[0167] In the Cell ID (CID) location method, the UE's location 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.

[0168] In addition to the CID positioning method, the E-CID positioning method can use additional UE measurements and / or NG-RAN radio resources to improve UE location estimation. While the E-CID positioning method can partially utilize the same measurement methods as the measurement control system on the RRC protocol, it typically does not perform additional measurements solely for UE location measurement. In other words, additional measurement configuration or measurement control messages may not be provided for UE location measurement. The UE does not expect to request additional measurement operations solely for location measurement, and the UE can report measurements obtained through normally measurable methods.

[0169] For example, the serving gNB can use E-UTRA measurements provided by the UE to implement the E-CID positioning method.

[0170] Measuring elements that can be used for E-CID positioning may include, for example, the following.

[0171] - 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 Indication (RSSI), UTRAN Common Pilot Channel (CPICH) Received Signal Code Power (RSCP), and / or UTRAN CPICH Ec / Io

[0172] - E-UTRAN Measurements: ng-eNB Rx-Tx Time Difference, Timing Advance (TADV), and / or AoA

[0173] Here, T ADV It can be divided into type 1 and type 2 as follows.

[0174] TADV type 1 = (ng-eNB Rx-Tx time difference) + (UE E-UTRA Rx-Tx time difference)

[0175] TADV type 2 = ng-eNB Rx-Tx time difference

[0176] AoA can be used to measure the orientation 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. The accuracy of AoA measurement increases with the arrangement of the antenna array. When the antenna array is arranged at equal intervals, the signals received at adjacent antenna elements can have a constant phase rotation.

[0177] ISAC and JCAS

[0178] Figure 13Examples of wireless sensing modes supported in ISAC / JCAS are shown.

[0179] Various methods for using wireless sensing are being widely discussed in recent wireless communication systems. Generally, conventional radar technology can be considered for wireless sensing purposes. However, there may be constraints associated with radar technology used for sensing, as it is dedicated to sensing and may not consider communication characteristics. Additionally, transmitting and receiving nodes may require separate devices to transmit and receive signals for wireless sensing. To address these issues, methods for using wireless sensing in wireless communication systems supporting cellular networks, such as 5G and / or next-generation 6G, are being actively researched. For example, these methods include Integrated Sensing and Communication (ISAC) or Joint Communication and Sensing (JCAS).

[0180] Within the 3GPP standardization framework, research has been initiated to support ISAC in 5G / 6G. According to TR 22.837 published by 3GPP SA1 WG, wireless sensing is defined as a technique that uses radio waves to measure distance, angle, or instantaneous velocity for the purpose of acquiring information about the environment and / or surrounding objects. Scenarios where sensing and communication share the same frequency band and hardware are being considered. Furthermore, methods for sharing or reusing radio waves used for communication (e.g., RS used for communication, such as SSB, DMRS, CSI-RS, and / or SRS) for radio waves used for sensing, or methods for designing separate radio waves for wireless sensing, are also being considered.

[0181] Generally, wireless sensing supported by ISAC involves the process of a signal transmitted from a transmitter being reflected by a target object and received by a receiver. Different sensing modes can be defined depending on the relationship between the transmitter and receiver. Based on whether the transmitter and receiver are matched, a matched transmitter and receiver can be defined as a monostatic sensing mode, while a mismatched transmitter and receiver can be defined as a bistatic sensing mode.

[0182] (1) gNB monobase sensing mode: gNB that transmits radio waves receives the reflected signal.

[0183] (2) gNB to gNB bistatic sensing mode: another gNB receives the reflected signal of radio waves sent by a specific gNB.

[0184] (3) gNB to UE bistatic sensing mode: The UE receives the reflected signal of the radio waves sent by the gNB.

[0185] (4) UE monobase sensing mode: The UE that transmits radio waves receives the reflected signal.

[0186] (5) UE to UE bistatic sensing mode: another UE receives the reflected signal of radio waves sent by a specific transmitting UE.

[0187] (6) UE to gNB bistatic sensing mode: gNB receives the reflected signal of radio waves sent by the UE.

[0188] In addition to the six use cases mentioned above, sensing modes that include multiple transmitting / receiving nodes can be referred to as multi-base sensing modes.

[0189] Applications of wireless sensing via ISAC / JCAS are being considered in a variety of scenarios. Typically, wireless sensing is considered for the purpose of acquiring information about targets without a communication module (or independent of a communication module). For example, many scenarios can be broadly categorized into three types.

[0190] (1) Object detection and tracking: This scenario aims to detect target objects or people and track their location information. For example, the following scenarios can be considered: intrusion detection in indoor / outdoor environments, tracking the location of unmanned aerial vehicles (UAVs) or automated guided vehicles (AGVs), and supporting autonomous driving.

[0191] (2) Environmental monitoring: This scenario aims to collect information about the surrounding environment of the sending / receiving nodes. For example, the following scenarios, such as rainfall observation and flood detection, can be considered.

[0192] (3) Motion monitoring: This scenario is designed to detect the movement of a target. For example, scenarios used to distinguish human movement or gestures can be considered.

[0193] The performance metrics and levels required for each of the above scenarios can vary and differ from one another. To design a suitable ISAC / JCAS for the quality of service required for each scenario, several key performance requirements need to be considered. In 3GPP standard TS 22.137, the key performance requirements for each service scenario are defined as follows: positioning estimation accuracy, velocity estimation accuracy, reliability (confidence level), sensing resolution, false alarm probability, maximum sensing service latency, and refresh rate. The required level for each key performance requirement can vary depending on the service scenario.

[0194] CPM (Carrier Phase Measurement)

[0195] Carrier phase measurement (CPM) is a position estimation algorithm used in GPS / GNSS. In short, CPM is a scheme that estimates the distance between a transmitter and receiver by measuring the phase of the received transmitted signal, and determines the location based on the estimated distance. In other words, a user's location can be measured by calculating the distance to each of multiple satellites based on signals received from them. In this case, a line-of-sight (LoS) is assumed between the satellite and the user, and based on this assumption, the time difference between the transmitter and receiver can be converted into a distance between them. Meanwhile, satellite channels can experience multipath and delay caused by the ionosphere, but these can be mitigated through modeling.

[0196] In specific scenarios, the following content is discussed regarding (3GPP) CPM.

[0197] To achieve higher positioning accuracy, two promising techniques identified in this specific scenario can be considered in Release 18. One is to increase bandwidth by using 5G spectrum on in-band carriers to transmit and receive positioning reference signals based on PRS / SRS bandwidth aggregation. The other is to use NR carrier phase measurement. GNSS carrier phase positioning (CPP) has been very successful for centimeter-level positioning, but its application is limited to outdoor applications. Compared with existing NR positioning methods, NR CPP has the potential to significantly improve performance in both indoor and outdoor deployments, and can provide lower latency and lower UE power consumption compared to outdoor RTK-GNSS. The detailed objectives for this specific scenario are as follows.

[0198] (1) Improved accuracy, integrity, and power efficiency: Research on solutions for integrity in positioning technologies that rely on RAT

[0199] - Reasons for recognition errors [RAN1, RAN2].

[0200] - Research on methods, processes, signals, etc. for the holistic determination of UE-based and UE-assisted positioning [RAN2].

[0201] - If possible, focus on reusing concepts and principles that are being developed for GNSS positioning integrity independent of RAT.

[0202] (2) Research on solutions to improve accuracy based on in-band carrier-based PRS / SRS bandwidth aggregation, such as time error, phase coherence, frequency error, power imbalance, etc. [RAN4].

[0203] - Research on solutions to improve accuracy based on NR carrier phase measurement: enabling reference signals, physical layer measurements, and physical layer procedures for NR carrier phase measurement in UE-based and UE-assisted positioning [RAN1]. New reference signals are considered only where necessary, focusing on reusing existing PRS and SRS.

[0204] (3) Research on the requirements of LPHAP developed in SA1, and an assessment of whether the previous RAN capabilities can support the power consumption and positioning requirements. Based on this assessment, if deemed beneficial, research on potential improvements to address the limitations will be conducted [RAN2, RAN1].

[0205] - The study is limited to a single representative LPHAP use case (use case 6 as defined in TS 22.104). The selected use case may be reviewed at the start of the study.

[0206] - Research is limited to enhancements to RRC_INACTIVE and / or RRC_IDLE.

[0207] That is, based on the specific scenario described above, CPM was identified as the primary item in version 18 positioning. Previous CPM was one of the position estimation algorithms used in GPS / GNSS. In short, it measures the phase of the received transmitted signal to estimate the distance between the transmitter and receiver, and performs positioning based on the estimated distance. Specifically, the user receives signals from multiple satellites, and the distance to each satellite is measured based on these signals to determine the user's position. In this case, it is assumed that there is line-of-sight (LoS) between the satellite and the user, and therefore the reception time difference between the transmitter and receiver can be replaced by the distance between them. Characteristically, multipath and delay caused by the ionosphere can occur in the satellite channel, which are eliminated through modeling.

[0208] The CPM described above can be compared with code phase measurement. Although code phase measurement is commonly used in GPS / GNSS correlated positioning, the actual phase of the carrier can be measured directly. Generally, CPM offers higher accuracy than code phase measurement because it directly measures the phase corresponding to the period of the carrier frequency. Furthermore, both CPM and code phase measurements can be performed based on similar or identical algorithms or methods.

[0209] In CPM, the basic positioning principle is as follows: 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 the period of the carrier frequency). In this case, the distance between the transmitter and receiver can be measured very accurately based on CPM. To use this method, the distance is typically converted to phase, and a pseudorange formula can be derived based on this conversion. As a CPM positioning method based on the pseudorange formula, GNSS / GPS-based positioning can be performed by applying the following Equation 6.

[0210] [Formula 6]

[0211] In Equation 6, p represents pseudorange measurement, ρ represents true distance, and d p d represents the satellite orbital 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 Indicates ionospheric delay, d trop Indicates tropospheric delay, e mp This represents the multipath effect, and e p This indicates receiver noise.

[0212] These terms can be considered in GPS / GNSS, and techniques exist to mitigate or eliminate them. Additionally, although not explicitly stated in Equation 6, the carrier phase information that a user can estimate is in the range [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 using a separate estimation method (integer ambiguity resolution).

[0213] Differentiation

[0214] The following factors should also be considered when using CPM for positioning in GNSS / GPS. Specifically, cyclic slip may occur at the receiver, which may need to be reported or corrected. Cyclic slip can occur when the receiver cannot track a signal beyond a certain threshold (e.g., half a cycle). When such cyclic slip occurs, measurements from the corresponding period from the transmitter may become invalid. After cyclic slip, the measurements can be reused, but the integer ambiguity needs to be re-estimated.

[0215] Additionally, location dilution (accuracy dilution) can occur. Location dilution means that even when positioning is performed based on the same number of transmitters and receivers and with the same signal-to-noise ratio (SNR), the accuracy of positioning can vary depending on the relative position (or distance) between the transmitters and receivers. This is often referred to as geometric dilution of accuracy (GDOP). For example, when a receiver calculates its location based on signals from N transmitters, the receiver's positioning accuracy may be lower if the transmitters are closely grouped compared to a more evenly distributed transmitter distribution.

[0216] Integer fuzzyness resolution

[0217] 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)).

[0218] In dynamic positioning using GPS carrier waves, centimeter-level accuracy can be achieved by precisely determining the unknown integer ambiguities contained in the observation data. This requires ambiguity resolution, a mathematical process used to convert uncertain, ambiguous distance observations into precise distances with millimeter-level accuracy. For GPS dynamic positioning, integer-constrained least squares is typically applied (Teunissen, 1994; Han et al., 1997; Verhagen, 2004).

[0219] However, when the receiver moves, the available observational data in the mathematical model is limited compared to when the receiver is stationary, leading to lower estimation accuracy and higher correlation, making it difficult to quickly and accurately resolve integer ambiguities (Teunissen, 1993; Lee et al., 2005). Therefore, in GPS dynamic positioning, the on-the-fly (OTF) method is typically used, which extracts and accumulates only the integer ambiguity portion of the normal equations. The time required to initialize the integer ambiguities can range from seconds to minutes, depending on satellite geometry and residual errors (Hofmann-Wellenhof et al., 2001). As long as there is no signal interruption (cyclic slip), this method relies on the previously determined integer ambiguities after initialization. In this method, high-precision positioning cannot be performed during initialization when it is required. Furthermore, the need to recalculate integer ambiguities due to changes in satellite geometry and the need for continuous monitoring of signal interruptions inherently complicate the algorithm.

[0220] In the mid-1990s, with the advent of dual-frequency receivers capable of observing precise pseudorange, instantaneous ambiguity resolution was developed for baselines of approximately 10 km (Han et al., 1996). This method resolves integer ambiguities for each time period independently, whenever the GPS receiver acquires carrier phase and precise pseudorange. Because this method does not require additional algorithms for checking for signal interruptions or satellite geometry, it is suitable for GPS structure monitoring environments where such interruptions 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 five satellites are observed or when multipath effects become significant (Lee et al., 2004).

[0221] Several algorithms exist for performing integer ambiguity resolution, and one of the most well-known and efficient methods is least squares ambiguity decorrelation adjustment (LAMBDA). To use LAMBDA, the floating estimate of position, i.e., the positioning within a period, should be separated from the integer ambiguity. Since integer ambiguities are integers rather than floating-point values, the resulting floating-point solution is not an accurate solution and can be further refined. The ellipse formed by the covariance of the integer ambiguities becomes extremely elongated in one direction, resulting in inefficient searching within that space. Therefore, LAMBDA transforms the system with the elongated ellipse into a system closer to a sphere, which is more efficient than previous methods in searching for solutions to integer ambiguities.

[0222] Another approach for estimating integer ambiguities involves using CPM and code phase measurements at various epochs. A disadvantage of this approach is the need for time-transformed values ​​to obtain the correlation between the CPM and code phase measurements, as well as the 1Hz GPS output from Novatel Superstar II. A brief overview is the use of measurements from a single epoch and the covariance of integer ambiguities from previous epochs. The reason for using the covariance from the previous epoch is that the integer ambiguity remains constant across both epochs while the receiver maintains phase lock on the carrier phase. Additionally, other algorithms exist for estimating integer ambiguities, such as those based on extended Kalman filters, and numerous variations exist.

[0223] Carrier phase measurement in NR

[0224] The aforementioned 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 a sinusoidal signal, rather than in the code domain. CPM between satellites and users in GPS / GNSS can be introduced into the gNB (or TRP) and UE in NR. When introducing this into NR, the following differences may exist: Unless the sinusoidal signal is redefined as the 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 wideband signal.

[0225] First, the current reference signal used for positioning in NR is the PRS. If the sinusoidal signal is redefined based on the PRS, it can have the configuration characteristics of the PRS. That is, the bandwidth (BW) configuration of the sinusoidal signal can be more flexible. Furthermore, the probability of a Loss of Sight (LoS) path between the BS (or TRP) and the user can be lower than the probability of 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 multipath effect between the BS (or TRP) and the user should also be considered in CPM in NR. From an algorithmic point of view, non-line-of-sight (NLOS) cancellation or LOS path estimation can be treated more seriously in CPM in NR. Additionally, compared to GPS, NR typically has a higher carrier frequency, a larger BW, and stricter latency requirements. Therefore, in CPM in NR, it is necessary to further reduce the time required to resolve integer ambiguities.

[0226] Solutions may be needed to address issues related to CPM-based user positioning using a PRS in NR. Since the PRS is a reference signal with a BW (Browser Wave), there should be a shared understanding between the higher layers and the UE regarding 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 specifying or indicating specific frequency resources. However, in CPM-based positioning using a PRS, the additional step of specifying or reporting specific frequencies may be necessary.

[0227] The aforementioned differencing can be performed to eliminate errors (errors in phase measurement) that may occur in CPM / CPP-based positioning due to the oscillator of the receiver / transmitter. For example, the UE can eliminate phase errors that may occur in the receiver by using the phase difference between the PRS received from each of the two TRPs. Similarly, the TRP or BS can send PRS to two UEs, receive phase values ​​measured based on the PRS from both UEs, and calculate the difference between the two received phase values ​​to eliminate phase errors that occur in the transmitter. This operation can be defined as double differencing.

[0228] As described above, in user location estimation scenarios within a radio access system, scenarios based on carrier phase measurement (CPM) or carrier phase positioning (CPP) for estimating user location can be considered. Here, CPM or CPP can be a method for calculating the distance from the BS to the user using the phase of a specific frequency (carrier), such as when a user estimates their own location by receiving a reference signal configured by the BS, estimating the distance using the time difference between the transmission and reception times of the reference signal. In this type of location estimation method, an error cancellation scheme implemented by subtracting measurements can be expected. For this purpose, the UE can be expected to be configured with two or more different resources, which are configured for simultaneous measurement / estimation. In this case, due to the measurement priority of each PRS resource configured in the UE in the existing manner, performing measurement / estimation simultaneously on different resources may be difficult. Methods to solve this problem will be described in detail below.

[0229] Priority rules for simultaneous carrier phase measurement

[0230] LMF can be configured to allow the UE to simultaneously measure different PRS resources (e.g., simultaneous PRS reception / measurement within the UE). To this end, during the phase instructing the UE to measure and report the reference signal carrier phase (RSCP) and / or reference signal carrier phase difference (RSCPD), LMF can indicate multiple PRS resources within one or more indicated time windows to indicate simultaneous PRS reception / measurement within the UE. That is, if multiple sets of PRS resources included within a single time window are indicated, the UE can determine that simultaneous PRS reception is indicated.

[0231] However, if measurements are performed based on existing PRS resource set element priority rules, the UE will inevitably only perform measurements on the highest-priority PRS resource set among those with different priorities. In this case, performing simultaneous reception / measurement on the aforementioned PRS resources may be difficult. To address this issue, existing methods of reinterpreting PRS resource set element priorities and / or methods of configuring dedicated PRS resource set priorities for the CPP can be considered.

[0232] The LMF can indicate multiple PRS resource sets to the UE for the purpose of simultaneous PRS reception / measurement within the UE. Thus, multiple PRS resource sets for simultaneous PRS reception / measurement within the UE can be indicated per time window. Alternatively, the LMF can indicate multiple PRS resource sets for the purpose of simultaneous PRS reception / measurement within the UE, and can indicate a single PRS resource set for other purposes. Alternatively, the UE's existing measurement priority configuration has the following hierarchical structure. The priority configuration of the TRP can have priority, and the priority of the PRS resource set can be optionally configured. Therefore, even when the existing priority configuration is described below as the priority of the PRS resource set, it can be interpreted as a substitute for the priority of the TRP. That is, in some cases, "priority of the PRS resource set implemented by existing methods" below can be interpreted as a substitute for "priority of the TRP ID," and this interpretation method can be a method that takes into account the priority configured to the UE using existing methods.

[0233] The fact that a particular PRS resource set has the highest priority among PRS resource sets can be interpreted as that particular PRS resource set being selected with the highest priority over the rest of the PRS resource sets, and CPP being measured.

[0234] 1. A new interpretation of the existing priority configuration of PRS resource set units.

[0235] The UE can be instructed to perform simultaneous PRS reception / measurement within the UE while the PRS resource set elements are prioritized according to the existing method as configured from the LMF. In this case, the UE can reinterpret the priority of the PRS resource set elements as follows.

[0236] (1) Method 1

[0237] For Method 1, the UE can determine the highest priority to be indicated / configured for the purpose of the PRS resource set indicated by the LMF for simultaneous PRS measurements within the UE, without considering the priority of previously indicated / configured PRS resource set elements.

[0238] That is, when a specific PRS resource set is indicated for simultaneous PRS measurements within the UE, the UE can determine that the priority of that specific PRS resource set indicated for CPP measurements is higher than the priority of previous PRS resource sets. In other words, for a specific PRS resource set indicated for CPP measurements, the UE can disregard the priority indicated in a standard manner and determine that the highest priority is configured / indicated. Alternatively, the UE can determine that the highest priority (e.g., priority 0) of a specific PRS resource set indicated for CPP measurements overrides any previously established priorities. For example, the UE can determine that all PRS resource sets indicated for the purpose of CPP measurements (or for the purpose of simultaneous PRS measurements within the UE) are indicated / configured with the same priority 0, and can disregard the priorities between PRS resource sets indicated for the purpose of simultaneous PRS measurements within the UE.

[0239] Alternatively, the UE may determine / consider that the highest priority is configured for all PRS resources belonging to a TRP that transmits from the LMF for the purpose of simultaneous PRS measurements within the UE. That is, the UE may, for at least one PRS resource set indicated for the purpose of simultaneous PRS measurements or CPP measurements within the UE, disregard the priority indicated / configured in the existing manner and determine that the highest priority is configured / indicated for the PRS resource set transmitted by the TRP to which the at least one PRS resource set belongs. Alternatively, the UE may determine that the previous priority of the PRS resource set of the TRP transmitting the at least one PRS resource set has been overridden by the highest priority. In other words, if at least one PRS resource set is indicated for the purpose of simultaneous PRS measurements or CPP measurements within the UE, the UE may determine that, through the indication of the at least one PRS resource set, the highest priority is indicated / configured for the at least one PRS resource set (or multiple PRS resource sets associated with the TRP transmitting the at least one PRS resource set), rather than the previous priority.

[0240] When priorities are reinterpreted using the methods described above, the priority among PRS resource sets with the same priority (the PRS resource set whose LMF is indicated for the purpose of simultaneous PRS measurements within the UE) can also be determined. In this case, the UE can determine the priority among PRS resource sets based on previously indicated priorities. For example, the UE can first determine that the PRS resource set whose LMF is indicated for the purpose of simultaneous PRS measurements within the UE has a higher priority than the other PRS resource sets, and then determine the priority among PRS resource sets based on previous priorities (as described above, previous priorities established among PRS resource sets regardless of the purpose of CPP measurements).

[0241] (2) Method 2: Time-domain priority of CPP

[0242] In Method 2, the UE may assume / determine that among multiple PRS resource sets configured by existing priority rules, two or more PRS resource sets with the same or similar time resource configurations are configured with the same priority.

[0243] For example, when a CPP measurement (or simultaneous PRS / CPP measurement within the UE) is established, the UE can interpret the previously established priority rules from the LMF as follows: Even if two PRS resource sets are configured with different priorities, if the two PRS resource sets have the same time configuration or are configured within a specific time interval, the UE can determine that the two PRS resource sets are configured with the higher priority of the two PRS resource sets equally. Here, the situation where the two PRS resource sets are configured within a specific time interval can be that the time resources of the two PRS resource sets are configured within a single indicated time window interval, or that the time resources between the two PRS resource sets are located within a pre-agreed or committed time interval.

[0244] For example, based on the periodic location of all / part of the time slots configured for PRS resources included in a specific PRS resource set with high priority, another PRS resource set (e.g., another PRS resource set with the same parameters as the specific PRS resource set, such as period and time slot offset, or another PRS resource set whose time resources periodically overlap with its) can be configured in the same time slot. In this case, even if the other PRS resource set has a lower priority than the specific PRS resource set, the UE can determine / consider that the priority of the other PRS resource set is the same as the priority of the specific PRS resource set.

[0245] (3) Method 3

[0246] For method 3, the UE can determine that, for the purpose of simultaneous CPP measurement within the UE, the PRS resource set (or TRP) containing PRS resources received within the indicated time window is indicated to have a higher priority than the previously configured PRS resource set unit.

[0247] Specifically, when CPP measurements are configured (or simultaneous CPP measurements within the UE are configured), the UE can receive a time window (the time window for CPP) from the LMF. In this case, the UE can reinterpret the priority of the previously configured PRS resource set as follows: The UE can determine / consider that a PRS resource set configured with PRS resources expected to be received within the time window (or the PRS resource set of the TRP sending that PRS resource) is configured with a higher priority than the previously configured PRS resource set (e.g., the highest priority).

[0248] (4) Method 4

[0249] For method 4, the LMF can configure a separate priority for the PRS resource set used for CPP measurements based on the information reported by the UE, or update the priority of the previously configured PRS resource set.

[0250] Specifically, a UE with CPP measurement capability can, after receiving the priority of PRS resource sets from the LMF, explicitly report the RSRP of a specific number of PRS resource sets according to previous priority rules, or implicitly report the RSRP through PRS resource set IDs, etc., according to the order of RSRPs. The LMF can, based on the reported information, configure the priority among PRS resource sets individually for CPP measurements, or update the previous priorities of previous PRS resource sets. The UE can select PRS resource sets based on the priority configured separately for CPP measurements or the updated priority, and perform measurements and reporting on the selected PRS resource sets.

[0251] 2. Configuration of new priorities for CPP measurements

[0252] For CPP measurement / reporting, PRS resource pairs and their priorities can be configured as follows.

[0253] - dl-PRS-ResourcePrioritySubset-Sup: This field provides a subset of DL-PRS resources associated with the target nr-DL-PRS-ResourceID for priority reporting to CPP. Note: This field applies only to the CPP method and should be ignored for DL-TDOA and Multi-RTT positioning.

[0254] Therefore, for simultaneous CPP measurements, sequential priorities can be configured for each PRS resource set using methods such as dl-PRS-ResourcePrioritySubset-Sup. These priorities can be configured only for a subset of the PRS resources assigned to the UE, or for pairs of PRS resources within a single PRS resource set. Since the purpose of simultaneous CPP measurements is double difference calculation, the PRS resource pairs with configured priorities can be from different PRS resource sets or different TRPs.

[0255] Considering these methods, current CPP measurements can be configured for joint reporting (RSCPD in conjunction with RSTD, or RSCP in conjunction with multiple RTTs).

[0256] Specifically, if the PRS resources used for joint reporting do not need to be the same (i.e., PRS resources used for measuring / reporting RSTD and multi-RTT are allowed to be different from those used for measuring / reporting RSCPD / RSCP), the UE can determine the priority of PRS resources (or sets of PRS resources) separately for each positioning scheme. This is because, even in the case of joint reporting, the purpose of RSTD / multi-RTT measurements is not to improve the accuracy of CPP measurements, but to eliminate candidate integer values ​​for solving integer ambiguity at the LMF or UE side. In this case, the UE can always be instructed by the LMF to perform both measurements based on the traditional positioning scheme and CPP measurements (i.e., non-independent CPP measurements). However, if CPP measurements that do not include measurements based on the existing positioning scheme are configured (i.e., independent CPP measurements), or if independent CPP measurements and non-independent CPP measurements are frequently switched, the priority application method described above (i.e., determining priority for each positioning measurement) can be applied.

[0257] For example, even when configured for joint reporting, RSTD / Multi-RTT measurements can be performed on PRS resources separate from RSCP / RSCPD measurements. Therefore, the priority of the PRS resource set for RSTD / Multi-RTT measurements can follow the previous priority configuration, while the priority of the PRS resource set for RSCP / RSCPD measurements can follow the priority configuration of PRS resource pairs within a separately configured PRS resource set. Alternatively, the priority of each measurement can be further considered with additional conditions. For example, priority can be determined by assuming the same QCL (quasi-co-location assumption) exists between the PRS resource set used for RSTD / Multi-RTT measurements and the PRS resource set used for CPP measurements. That is, when determining the priority of the PRS resource set used for RSTD / Multi-RTT measurements, even if a PRS resource set indicates a higher priority according to existing priority rules, the UE can determine that the PRS resource set has the lowest priority if it is not indicated to have a priority for a PRS resource pair separately configured for CPP measurements. In other words, even if CPP measurements and RSTD / multi-RTT measurements are allowed to be performed on different PRS resources, the PRS resource set used for RSTD / multi-RTT measurements can be selected from a PRS resource set that is prioritized by PRS resource pairs that are configured separately for CPP measurements.

[0258] Alternatively, if the PRS resources used for joint reporting need to be identical (i.e., the PRS resources used for measuring / reporting RSTD / multi-RTT are not allowed to be the same as those used for measuring / reporting RSCPD / RSCP), then the UE needs to jointly determine the priority of the PRS resource set used for measuring / reporting RSTD / multi-RTT and the PRS resource set used for measuring / reporting RSCPD / RSCP. That is, this is joint reporting, and therefore the RSTD / multi-RTT measurements at the LMF end can be directly used for integer ambiguity resolution of CPP measurements, thus it can be assumed that the PRS resources for measuring CPP need to be identical to the PRS resources used for existing positioning. In this case, when the UE performs RSTD / multi-RTT measurements / reports according to the LMF configuration, the UE can determine the priority of the PRS resource set / PRS resources differently depending on whether the RSTD / multi-RTT measurement / report includes the configuration of RSCP / RSCPD measurement / reports (or whether there is a joint reporting indication / request via auxiliary data).

[0259] For example, the UE may be instructed by the LMF to perform both RSTD / Multi-RTT and CPP (RSCP / RSCPD) measurements / reports. In this case, the UE may select / determine the PRS resources / PRS resource pairs used for RSTD / Multi-RTT and CPP (RSCP / RSCPD) measurements / reports based on the priority of a PRS resource set or PRS resource pair configured separately for CPP measurements. Alternatively, even when instructed to report both RSTD / Multi-RTT and CPP (RSCP / RSCPD) simultaneously, the UE may, in certain circumstances, report only measurements for RSTD / Multi-RTT. In this case, the UE may perform RSTD / Multi-RTT measurements based on the priority of the previously configured PRS resource set, regardless of the priority of the PRS resource set or PRS resource pair configured separately for CPP measurements. For example, specific situations may include: the reporting periods of RSTD / multi-RTT measurements and CPP measurements are different; the measurement quality of the PRS resource set used for CPP measurements does not meet predefined conditions / thresholds; the received channel quality (e.g., LOS conditions or Doppler) of the PRS resource set used for CPP measurements does not meet pre-agreed conditions / thresholds; or the difference between the previous CPP measurement / report value and the current CPP measurement is not greater than a pre-agreed specific threshold.

[0260] In other words, when a UE is instructed to perform both RSTD / Multi-RTT measurements and CPP (RSCP / RSCPD) measurements, the UE can determine whether to prioritize the PRS resource set for the measurement based on the priority of the previous PRS resource set or the priority of a PRS resource set or PRS resource pair configured separately for CPP, depending on the feasibility of simultaneous measurement / reporting between RSTD / Multi-RTT and CPP.

[0261] Figure 14 This is a diagram used to explain the method by which the UE performs measurements for positioning.

[0262] The following will describe in detail at least one of methods 1 to 4 of the above-mentioned "new interpretation of the existing priority configuration of the PRS resource set unit" and / or the method by which the UE selects / determines the PRS resource set / PRS resource to perform the measurement / report for positioning based on the "new priority configuration for CPP measurement".

[0263] refer to Figure 14The UE can receive configuration information from the network (LMF or local server), which includes information about multiple Positioning Reference Signal (PRS) resource sets and first priority information among these multiple PRS resource sets (S141). Here, the first priority information is information about the priority among PRS resource sets according to the existing priority rules described above, and may also be information about the priority related to measurements such as RSTD and RTT.

[0264] Information regarding multiple PRS resource sets can be information indicating which of the PRS resource sets, configured via resource configuration information (such as RRC signaling), are used for positioning. For example, information regarding multiple PRS resource sets can include information about a PRS resource set ID, which indicates which PRS resource set, configured via resource configuration information, is used for positioning. First priority information can be information configuring a priority for each of the multiple PRS resource sets. For example, the UE can receive configuration information during positioning-assisted data transmission. Alternatively, as described above, the UE can receive measurement configuration information from the network after receiving the configuration information, triggering measurement / reporting according to a specific positioning scheme. In this case, the measurement configuration information can include indication information for PRS resource sets associated with a specific positioning scheme.

[0265] Alternatively, the configuration information may also include information about PRS resource pairs included in at least one PRS resource set used for carrier phase-based positioning (CPP) measurements and second priority information between the PRS resource pairs. For example, the configuration information may include information about at least one PRS resource set for a CPP-based positioning scheme, information about PRS resource pairs included in at least one PRS resource set, and second priority information regarding the priority between the PRS resource pairs. As described above, a PRS resource pair is a PRS resource pair selected for double difference calculation in CPP measurements (i.e., for the purpose of simultaneous CPP measurements), and may be two PRS resources used for different transmit and receive points (TRPs).

[0266] Then, the UE can select / determine the PRS resource set with higher priority among multiple PRS resource sets based on the configuration information (S143). Alternatively, the UE can select / determine the PRS resource set with higher priority among multiple PRS resource sets based on the configuration information and / or the positioning type / scheme. For example, as described above, the UE can be instructed by the network to perform measurement / reporting for a specific positioning type (or, the configuration information may include information instructing measurement / reporting for a specific positioning type / scheme). In this case, the UE can determine the priority among multiple PRS resource sets based on the specific positioning type and the configuration information, and select one or more PRS resource sets for measurement of the specific positioning type based on the determined priority.

[0267] Specifically, when a specific positioning type / scheme is CPP (i.e., when the measurement used for positioning is a CPP measurement, or when a simultaneous CPP measurement is indicated), the UE can determine / consider that the priority of at least one PRS resource set associated with the CPP measurement (e.g., at least one PRS resource set indicated for the CPP measurement or at least one PRS resource set configured with PRS resource pairs) is configured as the highest priority, regardless of the first priority information, as described above. In this case, the UE can select / determine the PRS resource set for the CPP measurement from at least one PRS resource set based on the determined / considered priority. In this case, the UE can determine / consider that at least one PRS resource set is equally configured with the highest priority. In this case, the UE can determine that at least one PRS resource set among multiple PRS resource sets has the highest priority and determine at least one PRS resource set as the PRS resource set for the CPP measurement. For example, unlike other positioning types / schemes, the UE can select / determine two or more PRS resource sets as the PRS resource sets for the CPP measurement.

[0268] When the specific positioning type / scheme is CPP, the UE can further consider PRS resource pairs and second priority information to determine / select PRS resources for CPP measurements within at least one PRS resource set. For example, the UE can determine / select the PRS resource set for measuring at least one PRS resource set regardless of the first priority information, select the PRS resource pair with the highest priority from the PRS resource pairs configured for at least one PRS resource set based on the second priority information, and perform measurements for double difference calculation on the selected PRS resource pair. For example, if the specific positioning type / scheme is CPP, the PRS resource for measurement can be (limitedly) selected as one of the PRS resource pairs through configuration information.

[0269] Alternatively, the configuration information may also include information about the time window associated with CPP measurements. If the specific positioning type / scheme is CPP, as described above, the UE can reinterpret the priority of two or more PRS resource sets configured within a time window among multiple PRS resource sets. For example, among the priorities of two or more PRS resource sets configured by the first priority information, the highest priority may be considered / determined as being equally configured for all of the two or more PRS resource sets. Alternatively, the UE may determine / consider the priority of the PRS resource set that includes PRS resources expected to be received within the time interval as the highest priority, regardless of the first priority information.

[0270] Conversely, if the measurement used for positioning is not a CPP measurement (e.g., an RSTD or RTT measurement as an existing positioning scheme), the UE can determine the priority of multiple PRS resource sets based on a first priority and perform the positioning measurement for the determined PRS resource set with the highest priority. That is, the UE can determine / select the PRS resource set for which the measurement is performed based on the first priority information, without considering the second priority information and information about the PRS resource pairs.

[0271] The UE can perform positioning measurements within the PRS resource set and / or PRS resources determined / selected as described above, and report the measurement information as a result to the network. For example, if the measurement is a CPP measurement, the UE can report measurement information about the phase difference between the selected PRS resource pairs to the network.

[0272] Figure 15 This is a diagram illustrating a method for explaining the configuration information of measurements used for positioning provided by the network to the UE.

[0273] refer to Figure 15 The network can send configuration information to the UE, which includes information about multiple Positioning Reference Signal (PRS) resource sets and first priority information among the multiple PRS resource sets (S151). For example, the network (LMF, location server) can send configuration information to the UE during positioning-assisted data transmission (via BS).

[0274] Information regarding multiple PRS resource sets can be information indicating which PRS resource set is used for location within a PRS resource set configured via resource configuration information (such as RRC signaling). For example, information regarding multiple PRS resource sets can include information about the PRS resource set ID, which indicates the PRS resource set used for location within a PRS resource set configured via resource configuration information. First priority information can be information configuring priority for each of the multiple PRS resource sets.

[0275] Alternatively, as described above, the network may send measurement configuration information that triggers measurement / reporting based on a specific positioning scheme after sending configuration information. In this case, the measurement configuration information may include indication information for a set of PRS resources associated with the specific positioning scheme.

[0276] Alternatively, the configuration information may also include information about PRS resource pairs included in at least one PRS resource set used for CPP measurements and second priority information between the PRS resource pairs. For example, the configuration information may include information about at least one PRS resource set used in a CPP-based positioning scheme, information about PRS resource pairs included in at least one PRS resource set, and second priority information regarding the priority between the PRS resource pairs. As described above, the network can select PRS resource pairs for two different transmit and receive point TRPs for double difference calculations in CPP measurements (i.e., for the purpose of simultaneous CPP measurements), and the configuration information may include information about the selected PRS resource pairs and second priority information between the selected PRS resource pairs.

[0277] Then, the network can receive measurement information from the UE regarding a higher-priority PRS resource set among multiple PRS resource sets based on configuration information (S153). For example, the network can anticipate reporting measurement information from a higher-priority PRS resource set among multiple PRS resource sets based on configuration information and location type. For example, as described above, the network can trigger / instruct the UE to perform measurement / reporting for a specific location type. In this case, the network can anticipate reporting measurement information measured on a specific PRS resource set or a specific PRS resource pair determined based on the specific location type and configuration information.

[0278] Specifically, when the network instructs the UE to perform CPP measurements (e.g., for the purpose of simultaneous CPP measurements), the network may expect to report measurement information measured within at least one PRS resource set associated with the CPP measurement (e.g., at least one PRS resource set indicated for the CPP measurement or at least one PRS resource set configured with PRS resource pairs), regardless of the first priority information, as described above. For example, the network may expect to report measurement information measured from more than one PRS resource set, unlike other positioning types / schemes.

[0279] When the network instructs the UE to perform CPP measurements, the network can anticipate reporting measurement information regarding high-priority PRS resource pairs based on the PRS resource pairs indicated by the configuration information and the second priority information. For example, the network can anticipate reporting measurement information based on the second priority information regarding the highest-priority PRS resource pair among those configured for at least one PRS resource set (e.g., the highest-priority PRS resource pair among at least one PRS resource pair that satisfies the measurement conditions). Here, the PRS resource pair is two PRS resources used for the double difference calculation measurement as described above, and the measurement information may include information about the phase difference between the two PRS resources.

[0280] Alternatively, the configuration information may also include information about the time window associated with CPP measurements. If the specific positioning type / specific positioning scheme is CPP, as described above, the network can expect to report measurement information for two or more PRS resource sets configured within a time window across multiple PRS resource sets.

[0281] Conversely, if the measurements used for positioning are not CPP measurements (e.g., RSTD or RTT measurements as part of an existing positioning scheme), the network can expect to report measurement information based on measurements taken in a high-priority PRS resource set with first priority.

[0282] Thus, the proposed disclosure can effectively ensure simultaneous measurements (CPP measurements) for subtraction calculations are performed on two or more PRS resource sets by reinterpreting the priorities in previous PRS resource sets for CPP measurements or by configuring separate priorities for CPP measurements. Alternatively, the proposed disclosure can significantly improve the accuracy of CPP-based positioning by additionally configuring the priorities between PRS resource pairs.

[0283] Example of a communication system using this disclosure

[0284] The various descriptions, functions, processes, proposals, methods and / or operation flowcharts disclosed in this document can be applied to various fields requiring wireless communication / connectivity (5G) between devices, but are not limited thereto.

[0285] In the following description, it will be illustrated in more detail with reference to the accompanying drawings. In the following drawings / description, unless otherwise specified, the same reference numerals may refer to the same or corresponding hardware blocks, software blocks, or functional blocks.

[0286] Figure 16 An example of a communication system 1 applied to this disclosure is shown.

[0287] Reference Figure 16The communication system 1 applied in this disclosure includes wireless devices, base stations (BS), and networks. Herein, a wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G New RAT (NR) or Long Term Evolution (LTE)) and may be referred to as a communication / radio / 5G device. Wireless devices may include (but are not limited to) robots 100a, vehicles 100b-1 and 100b-2, extended reality (XR) devices 100c, handheld devices 100d, home appliances 100e, Internet of Things (IoT) devices 100f, and artificial intelligence (AI) devices / servers 400. For example, a vehicle may include a vehicle with wireless communication capabilities, an autonomous 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 can include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices, and can be implemented in the form of head-mounted displays (HMDs), head-up displays (HUDs) installed in vehicles, televisions, smartphones, computers, wearable devices, home appliances, digital signage, vehicles, robots, etc. Handheld devices can include smartphones, smart tablets, wearable devices (e.g., smartwatches or smart glasses) and computers (e.g., laptops). Home appliances can include TVs, refrigerators, and washing machines. IoT devices can include sensors and smart meters. For example, the BS and network can be implemented as wireless devices, and a particular wireless device 200a can operate as a BS / network node relative to other wireless devices.

[0288] Wireless devices 100a to 100f can connect to network 300 via BS 200. AI technology can be applied to wireless devices 100a to 100f, and wireless devices 100a to 100f can connect to AI server 400 via network 300. Network 300 can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although wireless devices 100a to 100f can communicate with each other via BS 200 / network 300, wireless devices 100a to 100f can perform direct communication with each other (e.g., sidelink communication) without going through the BS / network. For example, vehicles 100b-1 and 100b-2 can perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0289] Wireless communication / connections 150a, 150b, or 150c can be established between wireless devices 100a to 100f / BS 200 or between BS 200 and BS 200. In this document, wireless communication / connections can be established via 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)). Wireless devices and BS / wireless devices can transmit / receive radio signals to / from each other via wireless communication / connections 150a and 150b. For example, wireless communication / connections 150a and 150b can transmit / receive signals via various physical channels. For this purpose, at least a portion of the configuration information for configuring the process of transmitting / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes can be performed based on various proposals of this disclosure.

[0290] Examples of wireless devices using this disclosure

[0291] Figure 17 Examples of wireless devices applicable to this disclosure are provided.

[0292] Reference Figure 17 The first wireless device 100 and the second wireless device 200 can transmit radio signals via various RATs (e.g., LTE and NR). In this document, {first wireless device 100 and second wireless device 200} can correspond to... Figure 16 {Wireless Device 100x and BS 200} and / or {Wireless Device 100x and Wireless Device 100x}.

[0293] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and additionally include one or more transceivers 106 and / or one or more antennas 108. The processors 102 may control the memories 104 and / or the transceivers 106, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. For example, the processors 102 may process information in the memories 104 to generate a first information / signal, and then transmit a radio signal including the first information / signal via the transceivers 106. The processors 102 may receive a radio signal including a second information / signal via the transceivers 106, and then store the information obtained by processing the second information / signal in the memories 104. The memories 104 may be connected to the processors 102 and may store various information relating to the operation of the processors 102. For example, the memories 104 may store software code including commands for performing some or all of the processes controlled by the processors 102 or for performing the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. In this document, processor 102 and memory 104 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). Transceiver 106 may be connected to processor 102 and transmit and / or receive radio signals via one or more antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. Transceiver 106 may be used interchangeably with radio frequency (RF) units. In this disclosure, a wireless device may refer to a communication modem / circuit / chip.

[0294] According to the example, the first wireless device 100 or UE may include a processor 102 and a memory 104 connected to a transceiver 106. The memory 104 may include at least one program for performing operations related to at least one of methods 1 to 4 of “1. A New Interpretation of the Existing Priority Configuration of the PRS Resource Set Unit” described above, and / or operations related to the implementation described in “2. A New Priority Configuration for CPP Measurement”.

[0295] Specifically, the processor 102 can control the RF transceiver 106 to receive configuration information including first priority information among multiple PRS resource sets, and perform positioning measurements based on the configuration information in the PRS resource set with higher priority among the multiple PRS resource sets. Here, the configuration information may also include information about PRS resource pairs included in at least one PRS resource set for carrier phase-based positioning (CPP) measurements and second priority information among the PRS resource pairs.

[0296] Alternatively, the first wireless device 100 or UE may be a processing device including a processor 102 and a memory 104. The processing device may include at least one processor 102 and at least one memory connected to the at least one processor 102, the at least one memory storing instructions, wherein the instructions, based on execution by the at least one processor, cause the UE to receive configuration information including information about a plurality of Positioning Reference Signal (PRS) resource sets and first priority information among the plurality of PRS resource sets, and to perform a measurement for positioning based on the configuration information in the PRS resource set having a higher priority among the plurality of PRS resource sets. Here, the configuration information may further include information about PRS resource pairs included in at least one PRS resource set for carrier phase-based positioning (CPP) measurements and second priority information among the PRS resource pairs.

[0297] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and additionally include one or more transceivers 206 and / or one or more antennas 208. The processors 202 may control the memories 204 and / or the transceivers 206, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. For example, the processors 202 may process information in the memories 204 to generate a third information / signal, and then transmit a radio signal including the third information / signal via the transceivers 206. The processors 202 may receive a radio signal including a fourth information / signal via the transceivers 206, and then store the information obtained by processing the fourth information / signal in the memories 204. The memories 204 may be connected to the processors 202 and may store various information relating to the operation of the processors 202. For example, the memories 204 may store software code including commands for executing some or all of the processes controlled by the processors 202 or for executing the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. In this document, processor 202 and memory 204 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). Transceiver 206 may be connected to processor 202 and transmit and / or receive radio signals via one or more antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. Transceiver 206 may be used interchangeably with an RF unit. In this disclosure, a wireless device may refer to a communication modem / circuit / chip.

[0298] According to the example, the second wireless device 200 or network may include a processor 202 and a memory 204 connected to the transceiver 206. The memory 204 may include at least one program for performing operations related to at least one of methods 1 to 4 of “1. A New Interpretation of the Existing Priority Configuration of the PRS Resource Set Unit” described above, and / or operations related to the implementation described in “2. A New Priority Configuration for CPP Measurement”.

[0299] Specifically, the processor 202 can control the transceiver 206 to transmit configuration information, which includes information about a plurality of Positioning Reference Signal (PRS) resource sets and first priority information among the plurality of PRS resource sets. Based on this configuration information, the processor 202 can also receive measurement information regarding measurements performed on predetermined PRS resource sets among the plurality of PRS resource sets. Here, the configuration information may further include information about PRS resource pairs included in at least one PRS resource set used for CPP measurements and second priority information among the PRS resource pairs.

[0300] The hardware elements of wireless devices 100 and 200 will be described in more detail below. One or more protocol layers may be implemented by (but are 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 operation 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 operation flowcharts disclosed in this document. One or more processors 102 and 202 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information, according to the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document, and provide the generated signals to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive signals (e.g., baseband signals) and acquire PDUs, SDUs, messages, control information, data, or information from one or more transceivers 106 and 206, according to the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document.

[0301] 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 operation flowcharts 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 operation flowcharts 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 operation flowcharts disclosed in this document can be implemented using firmware or software in the form of code, commands, and / or command sets.

[0302] 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, code, instructions, and / or commands. One or more memories 104 and 204 may be configured with read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard disk drive, registers, cache memory, computer-readable storage media, and / or combinations thereof. One or more memories 104 and 204 may be located internally and / or externally to 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 via various technologies such as wired or wireless connections.

[0303] One or more transceivers 106 and 206 may transmit user data, control information, and / or radio signals / channels mentioned in the methods and / or operation flowcharts 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 descriptions, functions, processes, proposals, methods, and / or operation flowcharts 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 transmit and receive radio signals. For example, one or more processors 102 and 202 may perform controls to enable one or more transceivers 106 and 206 to transmit user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may perform controls to enable one or more transceivers 106 and 206 to 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 transmit and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operation flowcharts 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 for processing 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. For this purpose, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0304] Application examples of the wireless devices of the present invention

[0305] Figure 18 Another example of a wireless device applied to this disclosure is illustrated.

[0306] Reference Figure 18 Wireless devices 100 and 200 can correspond to Figure 17The wireless devices 100 and 200 are configured with 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... Figure 17 One or more processors 102 and 202 and / or one or more memories 104 and 204. For example, transceiver 114 may include Figure 17 The device comprises one or more transceivers 106 and 206 and / or one or more antennas 108 and 208. Control unit 120 is electrically connected to communication unit 110, storage unit 130, and add-on components 140, and controls the overall operation of the wireless device. For example, control unit 120 may control the electrical / mechanical operation of the wireless device based on programs / code / commands / information stored in storage unit 130. Control unit 120 may transmit information stored in storage unit 130 to an external location (e.g., another communication device) via communication unit 110 through a wireless / wired interface, or store information received from an external location (e.g., another communication device) via communication unit 110 in storage unit 130 via a wireless / wired interface.

[0307] The additional component 140 can be configured differently depending on the type of wireless device. For example, the additional component 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 can be configured according to (but is not limited to) a robot ( Figure 16 100a), vehicles ( Figure 16 100b-1 and 100b-2), XR device ( Figure 16 100c), handheld device ( Figure 16 100d), home appliances ( Figure 16 100e), IoT devices ( Figure 16 100f), digital broadcasting terminals, holographic devices, public safety devices, MTC devices, medical devices, fintech devices (or financial devices), security devices, climate / environment devices, AI servers / devices ( Figure 16 400), BS ( Figure 16 This can be achieved through 200 network nodes, etc. Wireless devices can be used in mobile or fixed locations depending on the use case / service.

[0308] exist Figure 18In both wireless devices 100 and 200, various elements, components, units / parts, and / or modules may be interconnected via wired interfaces, or at least a portion thereof may be wirelessly connected via communication unit 110. For example, in each of wireless devices 100 and 200, control unit 120 and communication unit 110 may be wired connected, and control unit 120 and first units (e.g., 130 and 140) may be wirelessly connected via communication unit 110. The various elements, components, units / parts, and / or modules within wireless devices 100 and 200 may also include one or more elements. For example, control unit 120 may be configured as a collection of one or more processors. As an example, control unit 120 may be configured as a collection of communication control processors, application processors, electronic control units (ECUs), graphics processing units, and memory control processors. As another example, memory 130 may be configured as random access memory (RAM), dynamic RAM (DRAM), read-only memory (ROM), flash memory, volatile memory, non-volatile memory, and / or combinations thereof.

[0309] Here, the wireless communication technologies implemented in the wireless devices (XXX, YYY) of this specification may include, in addition to narrowband IoT for low-power communication, LTE, NR, and 6G. 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 aforementioned names. Alternatively or additionally, the wireless communication technologies implemented in the wireless devices (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 by 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 aforementioned names. Alternatively or additionally, considering low-power communication, the wireless communication technology implemented in the wireless devices (XXX, YYY) of this specification is at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN), and is not limited to the aforementioned names. As an example, ZigBee technology can be based on various standards such as IEEE 802.15.4 to generate personal area networks (PANs) associated with low / low power digital communication, and can be referred to by various names.

[0310] The above embodiments are implementations in which the components and features of this disclosure are combined in a predetermined form. Unless otherwise expressly stated, each component or feature should be considered optional. Each component or feature may be implemented without being combined with other components or features. Additionally, embodiments of this disclosure may be constructed by combining some components and / or features. The order of operations described in the embodiments of this disclosure may be changed. Some configurations or features of one embodiment may be included in other embodiments, or may be replaced by corresponding configurations or features of other embodiments. Clearly, embodiments may be constructed by combining claims that are not expressly referenced in the claims, or may be included as new claims by modification after filing.

[0311] In this document, the embodiments of the present disclosure are described primarily based on the signal transmission / reception relationship between the terminal and the base station. Such a transmission / reception relationship is extended in the same / similar manner to signal transmission / reception between the terminal and a repeater or between the base station and a repeater. In some cases, specific operations described in this document as being performed by the base station can be performed by its upstream nodes. That is, obviously, various operations performed by the base station or by network nodes other than the base station for communicating with the terminal in a network including multiple network nodes containing the base station can be performed. The base station can be replaced by terms such as fixed station, node B, eNode B (eNB), access point, etc. Additionally, the terminal can be replaced by terms such as user equipment (UE), mobile station (MS), mobile subscriber station (MSS).

[0312] In the hardware configuration, the embodiments of this disclosure can 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.

[0313] In firmware or software configuration, the methods according to embodiments of this disclosure can be implemented in the form of modules, processes, functions, etc. 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 and receive data from the processor via various known means.

[0314] As described above, a detailed description of preferred embodiments of this disclosure has been provided to enable those skilled in the art to implement and perform this disclosure. Although reference has been made to preferred embodiments of this disclosure, those skilled in the art will understand that various modifications and alterations can be made to this disclosure within its scope.

[0315] Industrial applicability

[0316] The embodiments described above are applicable to various mobile communication systems.

Claims

1. A method for performing measurements by a user equipment (UE) in a wireless communication system, the method comprising the following steps: Receive configuration information, which includes information about multiple positioning reference signal (PRS) resource sets and first priority information among the multiple PRS resource sets; as well as Based on the configuration information, measurements for positioning are performed on the PRS resource set with higher priority among the plurality of PRS resource sets. The configuration information also includes information about PRS resource pairs included in at least one PRS resource set used for carrier phase-based positioning (CPP) measurements and second priority information between the PRS resource pairs.

2. The method according to claim 1, wherein, Based on the fact that the measurement used for the positioning is a CPP measurement, the UE determines that the highest priority is configured for at least one of the plurality of PRS resource sets, regardless of the first priority information.

3. The method according to claim 1, wherein, Based on the fact that the measurement used for the positioning is a CPP measurement, the UE determines that the same specific priority is configured for the at least one PRS resource set, regardless of the first priority information.

4. The method according to claim 1, wherein, The configuration information also includes information about the time window associated with CPP measurements.

5. The method according to claim 4, wherein, Based on the fact that the measurement used for the positioning is a CPP measurement, the UE is configured with the highest priority for the PRS resource set in which the PRS is received within the time window among the plurality of PRS resource sets.

6. The method according to claim 1, wherein, Since the measurement used for the positioning is a CPP measurement, the CPP measurement is performed only for one of the plurality of PRS resource pairs determined based on the second priority information.

7. The method according to claim 1, further comprising: Report measurement information regarding the results of performing the measurements. The measurement used for positioning is a CPP measurement, and the measurement information includes information about the phase difference between PRS received from the one PRS resource pair.

8. The method according to claim 1, wherein, Each of the plurality of PRS resource pairs includes two PRS resources associated with different Transmit and Receive Points (TRPs).

9. The method according to claim 1, wherein, Since the measurement used for the positioning is not a CPP measurement, the measurement is performed in the PRS resource set with the highest priority among the plurality of PRS resource sets based on the first priority information.

10. The method according to claim 1, wherein, The configuration information is sent to the network through a positioning-assisted data transmission process.

11. A computer-readable recording medium having a program for performing the method according to claim 1.

12. A user equipment (UE) for performing measurements in a wireless communication system, the UE comprising: Radio frequency (RF) transceivers; as well as The processor is connected to the RF transceiver. The processor controls the RF transceiver to receive configuration information, which includes information about multiple Positioning Reference Signal (PRS) resource sets and first priority information among the multiple PRS resource sets. Based on the configuration information, measurements for positioning are performed on the PRS resource sets with higher priority among the multiple PRS resource sets. The configuration information also includes information about PRS resource pairs included in at least one PRS resource set used for carrier phase-based positioning (CPP) measurements and second priority information between the PRS resource pairs.

13. A processing apparatus for controlling a user equipment (UE) performing measurements in a wireless communication system, the processing apparatus comprising: At least one processor; as well as At least one memory, connected to the at least one processor, stores instructions that, when executed by the at least one processor, cause the UE to receive configuration information, the configuration information including information about multiple Positioning Reference Signal (PRS) resource sets and first priority information among the multiple PRS resource sets, and based on the configuration information, performs positioning measurements in the PRS resource set with higher priority among the multiple PRS resource sets. The configuration information also includes information about PRS resource pairs included in at least one PRS resource set used for carrier phase-based positioning (CPP) measurements and second priority information between the PRS resource pairs.

14. A method for transmitting configuration information for carrier phase-based positioning (CPP) measurements via a network in a wireless communication system, the method comprising the steps of: Send configuration information, which includes information about multiple Positioning Reference Signal (PRS) resource sets and first priority information among the multiple PRS resource sets; as well as Receive measurement information for performing measurements on a predetermined PRS resource set among the plurality of PRS resource sets based on the configuration information. The configuration information also includes information about PRS resource pairs included in at least one PRS resource set used for CPP measurement and second priority information between the PRS resource pairs.

15. A network for transmitting configuration information for carrier phase-based positioning (CPP) measurements in a wireless communication system, the network comprising: Radio frequency (RF) transceivers; as well as The processor is connected to the RF transceiver. The processor controls the RF transceiver to transmit configuration information, which includes information about multiple Positioning Reference Signal (PRS) resource sets and first priority information among the multiple PRS resource sets. It also receives measurement information regarding measurements performed on predetermined PRS resource sets among the multiple PRS resource sets based on the configuration information. The configuration information also includes information about the PRS resource pairs included in at least one PRS resource set used for CPP measurement and second priority information between the PRS resource pairs.

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