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

Abstract

According to at least one example disclosed in the present specification, a method in which a first device transmits a signal in a wireless communication system comprises the steps of: receiving configuration information on a first type of reference signal related to positioning; transmitting a reference signal of the first type to the second device a plurality of times based on the configuration information in a time interval including a plurality of first time resources; and receiving a reference signal of a second type related to positioning from a second device in a second time resource located after a time interval comprising a plurality of first time resources, in which reception of the reference signal of the second type performed in the second time resource is associated with multiple transmissions of the reference signal of the first type, and a time interval including the plurality of first time resources may be determined based on a number of repetitions of the reference signal of the first type included in the configuration information.

Description

Technical Field

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

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

[0003] Technical issues

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

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

[0006] Technical Solution

[0007] According to one aspect, a method for transmitting a signal by a first device in a wireless communication system includes the following steps: receiving configuration information for a first type of reference signal related to positioning; transmitting the first type of reference signal to a second device multiple times based on the configuration information within a duration including multiple first time resources; and receiving a second type of reference signal related to positioning from the second device in a second time resource located after the duration including the multiple first time resources. The reception of the second type of reference signal performed on the one second time resource may be related to the multiple transmissions of the first type of reference signal. The duration including the multiple first time resources may be determined based on the number of repetitions of the first type of reference signal included in the configuration information.

[0008] The multiple transmissions of the first type of reference signal and the reception of the second type of reference signal may be related to a round trip time (RTT) measurement.

[0009] The reception of a second type of reference signal performed on a second time resource may be related to multiple RTT measurement values ​​based on the same reception timing (Rx timing). The first device may send a measurement report including multiple RTT measurement values. The measurement report may also include information about the time intervals between the multiple first time resources.

[0010] The plurality of first time resources may be spaced apart from each other in the time domain based on the time interval.

[0011] Information about the time interval may be obtained through a measurement configuration related to positioning.

[0012] The first type of reference signal may be a sounding reference signal (SRS) used for positioning.The first device may be a user equipment (UE).

[0013] The second type of reference signal may be a positioning reference signal (PRS), and the second device may be at least one BS or at least one transmission and reception point (TRP).

[0014] According to an aspect, there may be provided a computer-readable recording medium having recorded thereon a program for executing the above-described signal transmission method.

[0015] According to one aspect, a first apparatus for wireless communication for performing the above-mentioned signal transmission method may be provided.

[0016] According to one aspect, a method for receiving a signal from a first device by a second device in a wireless communication system includes the following steps: sending configuration information for a first type of reference signal related to positioning to the first device; receiving the first type of reference signal multiple times from the first device based on the configuration information within a duration including multiple first time resources; and sending a second type of reference signal related to positioning to the first device in a second time resource located after the duration including the multiple first time resources. The transmission of the second type of reference signal performed on the one second time resource may be related to the multiple receptions of the first type of reference signal. The duration including the multiple first time resources may be determined based on the number of repetitions of the first type of reference signal provided in the configuration information.

[0017] According to one aspect, a second apparatus for wireless communication for performing the above-mentioned signal receiving method may be provided.

[0018] Beneficial Effects

[0019] According to the embodiments of the present disclosure, a wireless signal transmission / reception process may be performed accurately and efficiently.

[0020] Those skilled in the art will appreciate that the effects that can be achieved using the present disclosure are not limited to those specifically described above, and other advantages of the present disclosure will be more clearly understood from the following detailed description in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Physical channels used in a 3rd Generation Partnership Project (3GPP) system as an exemplary wireless communication system and a general signal transmission method using the same are shown.

[0022] Figure 2 Shows the radio frame structure.

[0023] Figure 3 A resource grid showing time slots.

[0024] Figure 4 An exemplary mapping of physical channels in time slots is shown. Figure 1 Physical channels used in a 3rd Generation Partnership Project (3GPP) system as an exemplary wireless communication system and a general signal transmission method using the same are shown.

[0025] Figure 2 Shows the radio frame structure.

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

[0027] Figure 4 An exemplary mapping of physical channels in time slots is shown.

[0028] Figure 5 An exemplary physical downlink shared channel (PDSCH) reception and acknowledgement / negative acknowledgement (ACK / NACK) transmission process is shown.

[0029] Figure 6 An exemplary physical uplink shared channel (PUSCH) transmission process is shown.

[0030] Figure 7 An example of setting a positioning protocol is shown.

[0031] Figure 8 An example of OTDOA is shown.

[0032] Fig. 9 An example of multiple RTT is shown.

[0033] Fig.10 An example of nested RTT according to an embodiment is shown.

[0034] Fig.11 is a diagram for explaining operation of a first apparatus for nested RTT according to an embodiment.

[0035] Fig.12 is a diagram for explaining the operation of the second apparatus for nested RTT according to an embodiment.

[0036] Fig.13 2 is a diagram for explaining the operation of a device in a network system for nested RTT according to an embodiment.

[0037] Figures 14 to 17 An example of the communication system 1 and the wireless device applicable to the present disclosure is shown. DETAILED DESCRIPTION

[0038] Embodiments of the present disclosure are applicable to various wireless access technologies such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), and single carrier frequency division multiple access (SC-FDMA). CDMA can be implemented as a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented as a radio technology such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA can be implemented as a radio technology such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wireless Fidelity (Wi-Fi)), IEEE 802.16 (Worldwide Interoperability for Microwave Access (WiMAX)), IEEE 802.20, and Evolved UTRA (E-UTRA). UTRA is part of Universal Mobile Telecommunications System (UMTS). 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a part of Evolved UMTS (E-UMTS) using E-UTRA, and LTE-Advanced (A) is an evolved version of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolved version of 3GPP LTE / LTE-A.

[0039] As more and more communication devices require greater communication capacity, enhanced mobile broadband communications relative to traditional radio access technologies (RATs) are needed. In addition, large-scale machine-type communications (MTC), which can provide various services anytime and anywhere by connecting multiple devices and objects, is another important issue to be considered in the next generation of communications. Discussions are also underway to design communication systems that take into account services / UEs that are sensitive to reliability and latency. Therefore, discussions are underway to introduce new radio access technologies that take into account enhanced mobile broadband communications (eMBB), massive MTC, and ultra-reliable low-latency communications (URLLC). In the embodiments of the present disclosure, for simplicity, this technology will be referred to as NR (new radio or new RAT).

[0040] For the sake of brevity, 3GPP NR is mainly described, but the technical concept of the present disclosure is not limited thereto.

[0041] For background information, definitions of terms, and abbreviations related to the present disclosure, the following documents are incorporated by reference.

[0042] -38.211: Physical channels and modulation

[0043] -38.212: Multiplexing and channel coding

[0044] -38.213: Physical layer procedures for control

[0045] -38.214: Physical layer procedures for data

[0046] -38.215: Physical layer measurements

[0047] -38.300: NR and NG-RAN general description

[0048] -38.304: User Equipment (UE) procedures in idle mode and RRC inactive state

[0049] -38.321: Medium Access Control (MAC) Protocol Specification

[0050] -38.331: Radio Resource Control (RRC) protocol specification

[0051] -37.213: Introduction of channel access procedures for unlicensed spectrum for NR-based access

[0052] -36.355: LTE positioning protocol

[0053] -37.355: LTE positioning protocol

[0054] Terms and abbreviations

[0055] -5GC: 5G core network

[0056] -5GS: 5G system

[0057] -AoA: Angle of Arrival

[0058] -AP: Access Point

[0059] -CID: Cell ID

[0060] -E-CID: Enhanced Cell ID

[0061] -GNSS: Global Navigation Satellite System

[0062] -GPS: Global Positioning System

[0063] -LCS: Location Services

[0064] -LMF: Location Management Function

[0065] -LPP: LTE Positioning Protocol

[0066] -MO-LR: Mobile Originated Location Request

[0067] -MT-LR: Mobile Termination Location Request

[0068] -NRPPa: NR Positioning Protocol A

[0069] -OTDOA: Observed Time Difference of Arrival

[0070] -PDU: Protocol Data Unit

[0071] -PRS: Positioning Reference Signal

[0072] -RRM: Radio Resource Management

[0073] -RSSI: Received Signal Strength Indicator

[0074] -RSTD: Reference Signal Time Difference

[0075] -ToA: Time of arrival

[0076] -TP: Transmit Point

[0077] -TRP: Transmit and Receive Point

[0078] -UE: User Equipment

[0079] -SS: Search Space

[0080] -CSS: Common Search Space

[0081] -USS: UE-specific search space

[0082] -PDCCH: Physical Downlink Control Channel

[0083] -PDSCH: Physical Downlink Shared Channel

[0084] -PUCCH: Physical Uplink Control Channel

[0085] -PUSCH: Physical Uplink Shared Channel

[0086] -DCI: Downlink Control Information

[0087] -UCI: Uplink Control Information

[0088] -SI: System Information

[0089] -SIB: System Information Block

[0090] -MIB: Master Information Block

[0091] -RRC: Radio Resource Control

[0092] -DRX: Discontinuous Reception

[0093] -RNTI: Radio Network Temporary Identifier

[0094] -CSI: Channel State Information

[0095] -PCell: Primary cell

[0096] -SCell: Secondary cell

[0097] -PSCell: Primary SCG (Secondary Cell Group) cell

[0098] -CA: Carrier Aggregation

[0099] -WUS: wake-up signal

[0100] -TX: Transmitter

[0101] -RX: Receiver

[0102] In a wireless communication system, a user equipment (UE) receives information from a base station (BS) through a downlink (DL) and transmits information to the BS through an uplink (UL). The information transmitted and received by the BS and the UE includes data and various control information, and includes various physical channels according to the type / purpose of the information transmitted and received by the UE and the BS.

[0103] Figure 1 Physical channels used in the 3GPP NR system and a general signal transmission method using the same are shown.

[0104] When the UE is powered on again from a power-off state or enters a new cell, in step S101, the UE performs an initial cell search process (e.g., establishes synchronization with the BS). To this end, the UE receives a synchronization signal block (SSB) from the BS. The SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH). The UE establishes synchronization with the BS based on the PSS / SSS and obtains information such as a cell identity (ID). The UE can obtain broadcast information in the cell based on the PBCH. The UE can receive a DL reference signal (RS) during the initial cell search process to monitor the DL channel status.

[0105] After the initial cell search, the UE may acquire more specific system information by receiving a physical downlink control channel (PDCCH) and receiving a physical downlink shared channel (PDSCH) based on information of the PDCCH in step S102.

[0106] The UE may perform a random access procedure to access the BS in steps S103 to S106. For random access, the UE may send a preamble to the BS on a physical random access channel (PRACH) (S103) and receive a response message to the preamble on a PDCCH and a PDSCH corresponding to the PDCCH (S104). In the case of contention-based random access, the UE may perform a contention resolution procedure by further sending a PRACH (S105) and receiving a PDCCH and a PDSCH corresponding to the PDCCH (S106).

[0107] After the foregoing process, the UE may receive PDCCH / PDSCH (S107) and send a physical uplink shared channel (PUSCH) / physical uplink control channel (PUCCH) (S108) as a general downlink / uplink signal transmission process. The control information sent from the UE to the BS is called uplink control information (UCI). UCI includes hybrid automatic repeat and request confirmation / negative determination (HARQ-ACK / NACK), scheduling request (SR), channel state information (CSI), etc. CSI includes channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI), etc. Although UCI is usually sent on PUCCH, UCI may be sent on PUSCH when control information and business data need to be sent simultaneously. In addition, UCI may be sent aperiodically via PUSCH according to the request / command of the network.

[0108] Figure 2 The radio frame structure is shown. In NR, uplink transmission and downlink transmission are configured in frames. Each radio frame has a length of 10ms and is divided into two 5ms half frames (HF). Each half frame is divided into five 1ms subframes (SF). A subframe is divided into one or more time slots, and the number of time slots in a subframe depends on the subcarrier spacing (SCS). Depending on the cyclic prefix (CP), each time slot includes 12 or 14 orthogonal frequency division multiplexing (OFDM) symbols. When a normal CP is used, each time slot includes 14 OFDM symbols. When an extended CP is used, each time slot includes 12 OFDM symbols.

[0109] Table 1 exemplarily shows that the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to the SCS when a normal CP is used.

[0110] [Table 1]

[0111] <![CDATA[SCS(15*2 u )]]> <![CDATA[N slot symb ]]> <![CDATA[N frame,u slot ]]> <![CDATA[N subframe,u slot ]]> 15KHz(u=0) 14 10 1 30KHz(u=1) 14 20 2 60KHz(u=2) 14 40 4 120KHz(u=3) 14 80 8 240KHz(u=4) 14 160 16

[0112] *N slot symb : The number of symbols in a time slot

[0113] *N frame,u slot : Number of time slots in a frame

[0114] *N subframe,u slot : Number of time slots in a subframe

[0115] Table 2 shows that the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to the SCS when the extended CP is used.

[0116] [Table 2]

[0117] <![CDATA[SCS(15*2 u )]]> <![CDATA[N slot symb ]]> <![CDATA[N frame,u slot ]]> <![CDATA[N subframe,u slot ]]> 60KHz(u=2) 12 40 4

[0118] The structure of the frame is only an example. The number of subframes, the number of time slots, and the number of symbols in a frame may vary.

[0119] In the NR system, OFDM parameter sets (e.g., SCS) may be configured differently for multiple cells aggregated for one UE. Therefore, the (absolute time) duration of a time resource (e.g., SF, time slot, or TTI) (referred to as a time unit (TU) for simplicity) consisting of the same number of symbols may be configured differently between aggregated cells. Here, the symbol may include an OFDM symbol (or CP-OFDM symbol) and an SC-FDMA symbol (or a discrete Fourier transform-spread-OFDM (DFT-s-OFDM) symbol).

[0120] Figure 3 A resource grid showing a time slot. A time slot includes multiple symbols in the time domain. For example, when a normal CP is used, a time slot includes 14 symbols. However, when an extended CP is used, a time slot includes 12 symbols. A carrier includes multiple subcarriers in the frequency domain. A resource block (RB) is defined as a plurality of consecutive subcarriers (e.g., 12 consecutive subcarriers) in the frequency domain. A bandwidth part (BWP) may be defined as a plurality of consecutive physical RBs (PRBs) in the frequency domain and corresponds to a single parameter set (e.g., SCS, CP length, etc.). A carrier may include up to N (e.g., five) BWPs. Data communication may be performed via enabled BWPs, and only one BWP may be enabled for a UE. In a resource grid, each element is referred to as a resource element (RE), and a complex symbol may be mapped to each RE.

[0121] Figure 4An example of mapping physical channels in a time slot is shown. In the NR system, a frame is characterized by a self-contained structure in which a DL control channel, DL or UL data, and a UL channel can all be included in one time slot. For example, the first N symbols of a time slot can be used to carry a DL channel (e.g., PDCCH) (hereinafter referred to as a DL control region), and the last M symbols of a time slot can be used to carry a UL channel (e.g., PUCCH) (hereinafter referred to as a UL control region). Each of N and M is an integer equal to or greater than 0. The resource region (hereinafter referred to as the data region) between the DL control region and the UL control region can be used to send DL data (e.g., PDSCH) or UL data (e.g., PUSCH). The guard period (GP) provides a time gap for switching from a transmit mode to a receive mode or from a receive mode to a transmit mode. Some symbols in a subframe when switching from DL to UL can be configured as GPs.

[0122] PDCCH transmits DCI. For example, PDCCH (i.e., DCI) may carry information about the transmission format and resource allocation of the DL shared channel (DL-SCH), resource allocation information of the uplink shared channel (UL-SCH), paging information about the paging channel (PCH), system information about DL-SCH, information about resource allocation of high-level control messages (e.g., RAR sent on PDSCH), transmit power control commands, information about the activation / release of the configured scheduling, etc. DCI includes a cyclic redundancy check (CRC). The CRC is masked using various identifiers (IDs) (e.g., radio network temporary identifier (RNTI)) according to the owner or purpose of the PDCCH. For example, if the PDCCH is used for a specific UE, the CRC is masked by the UE ID (e.g., cell-RNTI (C-RNTI)). If the PDCCH is used for a paging message, the CRC is masked by the paging-RNTI (P-RNTI). If the PDCCH is for system information (eg, system information block (SIB)), the CRC is masked by a system information RNTI (SI-RNTI). When the PDCCH is for RAR, the CRC is masked by a random access-RNTI (RA-RNTI).

[0123] Figure 5 An exemplary PDSCH reception and ACK / NACK transmission process is shown. Figure 5, the UE may detect the PDCCH in time slot #n. The PDCCH includes DL scheduling information (e.g., DCI format 1_0 or DCI format 1_1), and indicates the DL assignment to PDSCH offset K0 and PDSCH-HARQ-ACK report offset K1. After receiving the PDSCH in time slot #(n+K0) according to the scheduling information of time slot #n, the UE may send UCI on the PUCCH in time slot #(n+K1). The UCI may include a HARQ-ACK response to the PDSCH. In the case where the PDSCH is configured to carry up to one TB, the HARQ-ACK response may be configured in one bit. In the case where the PDSCH is configured to carry up to two TBs, if spatial bundling is not configured, the HARQ-ACK response may be configured in 2 bits, and if spatial bundling is configured, the HARQ-ACK response may be configured in 1 bit. When slot #(n+K1) is designated as HARQ-ACK transmission timing of a plurality of PDSCHs, UCI transmitted in slot #(n+K1) includes HARQ-ACK responses to the plurality of PDSCHs.

[0124] Figure 6 An exemplary PUSCH transmission process is shown. Figure 6 , the UE may detect the PDCCH in slot #n. The PDCCH includes DL scheduling information (e.g., DCI format 1_0 or 1_1). Then, the UE may send the PUSCH in slot #(n+K2) according to the scheduling information in slot #n. The PUSCH includes the UL-SCH TB.

[0125] position

[0126] Positioning may refer to determining the geographic location and / or velocity of a UE based on measurements of radio signals. Location information may be requested and reported by a client (e.g., an application) associated with the UE. Location information may also be requested by a client within or connected to the core network. Location information may be reported in a standard format (e.g., a format based on cells or geographic coordinates) together with an estimated error in the location and velocity of the UE and / or the positioning method used for positioning.

[0127] Figure 7 is a diagram illustrating an exemplary positioning protocol configuration for positioning a UE, to which various embodiments are applicable.

[0128] Reference Figure 7, LTE Positioning Protocol (LPP) can be used as a point-to-point protocol between a location server (E-SMLC and / or SLP and / or LMF) and a target device (UE and / or SET) for positioning the target device using location-related measurements obtained from one or more reference resources. The target device and the location server can exchange measurement and / or location information based on signal A and / or signal B via LPP.

[0129] NRPPa may be used for information exchange between reference sources (access nodes and / or BSs and / or TPs and / or NG-RAN nodes) and location servers.

[0130] The NRPPa protocol provides the following functions.

[0131] -E-CID position information transmission. This function allows the reference source to exchange position information with the LMF for E-CID positioning.

[0132] -OTDOA information transfer. This function allows the reference source to exchange information with the LMF for OTDOA positioning.

[0133] - Reporting of general error conditions. This feature allows reporting of general error conditions for which no function-specific error messages have been defined.

[0134] Positioning methods supported in NG-RAN may include GNSS, OTDOA, E-CID, air pressure sensor positioning, WLAN positioning, Bluetooth positioning, TBS, uplink time difference of arrival (UTDOA), etc. Although any one positioning method may be used for UE positioning, two or more positioning methods may be used for UE positioning.

[0135] OTDOA (Observed Time Difference of Arrival)

[0136] Figure 8 is a diagram illustrating an observed time difference of arrival (OTDOA) positioning method to which various embodiments are applicable.

[0137] The OTDOA positioning method uses the time measured for DL ​​signals received by the UE from multiple TPs including eNB, ng-eNB, and PRS-only TPs. The UE uses the location assistance data received from the location server to measure the time of the received DL signals. The location of the UE can be determined based on such measurement results and the geographic coordinates of neighboring TPs.

[0138] A UE connected to a gNB may request a measurement gap from a TP to perform OTDOA measurements. If the UE does not know the SFN of at least one TP in the OTDOA assistance data, the UE may use autonomous gaps to obtain the SFN of the OTDOA reference cell before requesting a measurement gap for performing reference signal time difference (RSTD) measurements.

[0139] Here, RSTD may be defined as the minimum relative time difference between two subframe boundaries received from the reference cell and the measurement cell. That is, RSTD may be calculated as the relative time difference between the start time of the subframe received from the measurement cell and the start time of the subframe from the reference cell that is closest to the subframe received from the measurement cell. The reference cell may be selected by the UE.

[0140] For accurate OTDOA measurement, it is necessary to measure the time of arrival (ToA) of signals received from three or more TPs or BSs distributed geographically. For example, the ToA of each of TP 1, TP 2, and TP 3 can be measured, and the RSTD of TP 1 and TP 2, the RSTD of TP 2 and TP 3, and the RSTD of TP 3 and TP 1 are calculated based on the three ToA values. A geometric hyperbola is determined based on the calculated RSTD values, and the intersection of the curves of the hyperbola can be estimated as the position of the UE. In this case, the accuracy and / or uncertainty of each ToA measurement may occur, and according to the measurement uncertainty, the estimated position of the UE can be referred to as a specific range.

[0141] For example, the RSTD of two TPs may be calculated based on the following Equation 1.

[0142] [Formula 1]

[0143]

[0144] In equation 1, c is the speed of light, {x t ,y t} are the (unknown) coordinates of the target UE, {x i ,y i} are the (known) coordinates of TP, {x 1 ,y 1} are the coordinates of the reference TP (or another TP). Here, (T i -T 1 ) is the transmission time offset between the two TPs, called the “real time difference” (RTD), n i and n 1 is the UE ToA measurement error value.

[0145] E-CID (Enhanced Cell ID)

[0146] In the cell ID (CID) positioning method, the location of the UE can be measured based on the geographic information of the UE's serving ng-eNB, serving gNB and / or serving cell. For example, the geographic information of the serving ng-eNB, serving gNB and / or serving cell can be obtained through paging, registration, etc.

[0147] In addition to the CID positioning method, the E-CID positioning method may also use additional UE measurements and / or NG-RAN radio resources to improve the UE position estimate. Although the E-CID positioning method may partially utilize the same measurement method as the measurement control system on the RRC protocol, additional measurements only for UE position measurement are generally not performed. In other words, additional measurement configurations or measurement control messages may not be provided for UE position measurement. The UE is not expected to request additional measurement operations only for position measurement, and the UE may report measurement values ​​obtained by a generally measurable method.

[0148] For example, the serving gNB may use the E-UTRA measurements provided by the UE to implement the E-CID positioning method.

[0149] For example, the measurement elements that can be used for E-CID positioning may be as follows.

[0150] -UE measurements: E-UTRA Reference Signal Received Power (RSRP), E-UTRA Reference Signal Received Quality (RSRQ), UE E-UTRA Receive (Rx)-Transmit (Tx) Time Difference, GERAN / WLAN Reference Signal Strength Indicator (RSSI), UTRAN Common Pilot Channel (CPICH) Received Signal Code Power (RSCP) and / or UTRAN CPICH Ec / Io

[0151] -E-UTRAN measurements: ng-eNB Rx-Tx time difference, timing advance (T ADV ) and / or AoA

[0152] Here, T ADV It can be divided into type 1 and type 2 as follows.

[0153] T ADV Type 1 = (ng-eNB Rx-Tx time difference) + (UE E-UTRA Rx-Tx time difference)

[0154] T ADV Type 2 = ng-eNB Rx-Tx time difference

[0155] AoA can be used to measure the direction of the UE. AoA is defined as the estimated counterclockwise angle of the UE relative to the eNB / TP. In this case, the geographic reference direction may be north. The eNB / TP may use UL signals such as SRS and / or DMRS to perform AoA measurements. The measurement accuracy of AoA increases as the arrangement of the antenna array increases. When the antenna array is arranged at the same interval, the signals received at adjacent antenna elements may have a constant phase rotation.

[0156] UTDOA (Uplink Time Difference of Arrival)

[0157] UTDOA is a method of determining the location of a UE by estimating the arrival time of an SRS. When calculating the estimated SRS arrival time, the serving cell can be used as a reference cell to estimate the location of the UE by the arrival time difference with another cell (or base station / TP). To implement UTDOA, the E-SMLC may indicate the serving cell of the target UE in order to instruct the target UE to send an SRS. In addition, the E-SMLC may provide configurations such as periodic / aperiodic SRS, bandwidth, and frequency / group / sequence hopping.

[0158] Multiple RTT (Round Trip Time)

[0159] Fig. 9 is a diagram illustrating an exemplary multiple round trip time (multi-RTT) positioning method to which various embodiments are applicable.

[0160] Reference Fig. 9 (a) shows an exemplary RTT process, in which the initiating device and the responding device perform ToA measurement, and the responding device provides the ToA measurement to the initiating device for RTT measurement (calculation). The initiating device can be a TRP and / or a UE, and the responding device can be a UE and / or a TRP.

[0161] The initiating device may send an RTT measurement request, and the responding device may receive the RTT measurement request (1301).

[0162] The initiator can be 0 Send RTT measurement signal, the responding device can 1 ToA measurements are obtained (1303).

[0163] The response device can be 2 Sending RTT measurement signal, the initiating device can 3 ToA measurements are obtained (1305).

[0164] The responding device may send information about [t 2 -t 1 ], the initiating device may receive the information and calculate the RTT (1307) by using Formula 2. The information (1305) may be sent and received based on a separate signal or in an RTT measurement signal.

[0165] [Formula 2]

[0166] RTT = t 3 -t 0 -[t 2 -t 1 ]

[0167] Reference Fig. 9(b), the RTT may correspond to double ranging between the two devices. Position estimation may be performed from the corresponding information, and multilateration may be used for position estimation. d may be determined based on the measured RTT 1 d 2 and d 3 , and the location of the target device can be determined as BS 1 ,BS 2 and BS 3 (or TRP) with a radius d as the center 1 d 2 and d 3 The intersection of the circumferences of the circles.

[0168] Nested RTT positioning

[0169] As described above, various positioning schemes are used in 3GPP NR. Multi-RTT in 3GPP NR is a positioning scheme in which the BS and UE measure / report the difference between the reception and transmission times of a positioning reference signal (PRS) and a sounding reference signal (SRS) (i.e., Rx-TX time difference) and use the RS propagation delay obtained therefrom. The advantage of multi-RTT is that it is robust to synchronization degradation between TX ends compared to other positioning schemes, but the disadvantage is that relatively many RS resources are required and resource efficiency is low because both PRS and SRS transmissions from the BS and UE are required.

[0170] In the 3GPP NR standard, various methods have been discussed to support positioning schemes in sidelink (SL) transmission and reception environments. In the case of a SL environment, unlike general communications between a BS and a UE, the occurrence of clock errors may be significant depending on the method of determining the synchronization source. According to the 3GPP TS 38.101 standard, when NRV2X SLUEs use the same synchronization source, the clock error between the two UEs satisfies the condition within ±0.1ppm, but when the synchronization sources are not the same, the clock error between the two UEs may exceed ±0.1ppm. If a clock error occurs between two SLUEs, this may result in a difference in the estimated value of the Rx-TX time difference, thereby degrading the performance of multi-RTT.

[0171] As a positioning enhancement method, a positioning method based on carrier phase measurement (CPM) that provides cm-level positioning accuracy in the 3GPP NR standard has been discussed. CPM is mainly regarded as a method of measuring within the wavelength of the carrier frequency used when sending and receiving PRS and SRS. Considering that CPM is a scheme that requires high precision, it is necessary to analyze the impact of possible error sources between BS and UE more accurately than other existing positioning schemes, and it is necessary to consider methods to overcome this. From this perspective, a method of reducing the impact of synchronization errors between nodes by additionally applying multi-RTT to CPM-based positioning is proposed, but even in this case, there is still the problem that the above-mentioned clock error may affect CPM.

[0172] In order to solve this problem, the present specification proposes a new nested RTT structure, and also proposes the operation of nodes (e.g., BS / / TRP and UE) required for the nested RTT and the configuration of the information sent and received. The proposed method may have the advantageous effect of significantly reducing the influence of the clock error between two nodes (e.g., BS and UE or two SL UEs) on the accuracy of RTT-based positioning. The advantage of the proposed method may be that, because the improved sending / receiving method and reporting operation are considered based on the basic structure of the existing multi-RTT, most of the existing positioning methods and PRS / SRS sending / receiving processes may be shared.

[0173] In the following, the description focuses on the BS and UE that perform positioning based on the 3GPP NR system, but is not limited thereto. For example, there may be two or more nodes that send and receive reference signals for positioning, and may be applied to other communication systems having a structure that measures and utilizes the RX-TX time difference. One or more of the following methods may be applied in combination. Some of the terms, symbols, and sequences used may be replaced with other terms, symbols, and sequences. For example, the term nested RTT may be replaced with bilateral RTT.

[0174] The structure of the nested RTT may conform to the basic structure of RTT, in which two nodes transmit and receive a reference signal (hereinafter, referred to as RS) and perform positioning by measuring the RX-TX time difference via the transmitted and received RS. In this specification, for convenience of explanation, a method is proposed in which the nested RTT operates between two nodes forming a pair and the distance between the two nodes, but the proposed method may also be applied and used in a structure of multiple nested RTTs in which one node performs positioning by performing nested RTT for two or more nodes.

[0175] For convenience, in this specification, the two nodes are defined and described as node A and node B. In this case, node A is a node that transmits a reference signal burst (hereinafter, referred to as RS burst) including at least two RSs at an agreed time for nested RTT, and node B can expect node A to send the RS burst at the agreed time and perform a reception operation of at least two RSs in the RS burst. Node B is a node that transmits at least one RS at another agreed time for nested RTT, and expects node A to send RS at another agreed time, and node B can perform a reception operation of at least one RS.

[0176] For example, when the nested RTT structure is applied to Uu positioning based on 3GPPP NR, node A can be a BS or a UE. When node A is a BS, the RS burst sent by the BS can include a PRS sent by the BS, and when node A is a UE, the RS burst sent by the BS can include an SRS sent by the UE. Node B can be a BS or a UE. When node B is a BS, the RS sent can be a PRS sent by the BS, and when node B is a UE, the RS sent can be an SRS sent by the UE. In this case, the resource configuration and agreed sending / receiving time of the PRS can be information provided / indicated to the UE by the LMF through the LPP, and the resource configuration and agreed sending / receiving time of the SRS can be information provided / indicated to the UE through the RRC / MAC / DCI etc. sent by the BS. The BS can also be represented by a TRP.

[0177] For example, when the nested RTT structure is applied to SL positioning, Node A and Node B may each be a UE performing the SL function. In this case, the RS burst and RS transmitted by each node may be SL PRS or SL SRS.

[0178] Fig.10 Two examples of performing nested RTT between node A and node B are shown. Fig.10 , the RS burst may include multiple RS transmissions, for example, the multiple RS transmissions may be (at least) two. The multiple RS transmissions may be performed on different time resources in the time domain, and at least some of the different time resources may be spaced apart from each other. As described below, there may be a gap of at least one symbol between the time resources.

[0179] - Case 1 shows a structure in which node A first transmits an RS burst (RS-A1 or RS-A2), then node B receives the transmitted RS burst, and then transmits RS (RS-B), which is then received by node A.

[0180] - Case 2 shows the order in which the RS transmitted by Node B (RS-B) is transmitted first, then Node A receives the transmitted RS and transmits an RS burst (RS-A1 or RS-A2), and Node B receives the RS burst.

[0181] For example, when the RS belonging to the RS burst is represented as RS-Ax, in case 1, transmission of RS-Ax may be performed before RS-B, and in case 2, transmission of RS-Ax may be performed after transmission of RS-B.

[0182] RS Burst Configuration

[0183] To support nested RTT, a method is proposed to configure an RS burst and select two or more RSs within the RS burst (e.g., Fig.10 The RS-Ax method in case 1 / 2.

[0184] For example, the configuration of the RS burst may be defined using the duration of a positioning measurement gap (PMG). In this case, PMG refers to the duration of a measurement gap configured for a UE to obtain positioning measurements based on the 3GPP NR standard.

[0185] In the following, the proposed method is mainly explained for the case where the RS burst is configured using PMG and the RS provided in the RS burst is a PRS, but even in other cases, even when a duration configured to provide a duration for which positioning measurements can be performed for a specific node is used, the proposed method can generally be applied, and those skilled in the art will understand that the RS used is not limited to PRS. For example, by using the concept of positioning processing window introduced in the 3GPP NR Rel-17 standard, the proposed method can be applied to the configuration of RS bursts. The specific method can be used by selecting one of the following options, or two or more can be used in combination.

[0186] (Option 1-1) Method for determining positioning measurement gaps using RS bursts

[0187] When node A is a node that sends PRS, as a method of configuring an RS burst using PMG, the duration of the PMG configured by the LMF may be determined as the duration of the RS burst. In this case, the UE may determine the reception time of the PRS to be calculated by at least two time points (hereinafter, time 1 and time 2) within the PMG. In this case, time 1 and time 2 may be determined to be selected under the condition of ensuring the minimum gap interval. The (minimum) size of the gap may use a predetermined value. For example, the gap may be at least 1 or more symbols. An example of a gap may be an interval of 1ms (or 1 time slot). Alternatively, the size of the gap may be a value indicated by the LMF, and information about the size of the gap may be provided to the UE by the LMF through an LPP that sends configuration information of the structure of the nested RTT or by sending an LPP for indicating the operation of the nested RTT. And / or, the size of the gap may be determined so that the UE selects a value greater than or equal to the minimum gap size under the condition of satisfying the minimum gap size. In this case, the size of the gap may be configured within a range that allows the UE to select two or more RSs within the PMG and use these RSs for the measurement purpose of the nested RTT.

[0188] The configuration of the PMG for nested RTT can be determined to share the configuration of the PMG for other positioning methods. This has the advantage of being able to configure the RS burst without incurring separate signaling overhead.

[0189] The configuration of the PMG for nested RTT can be configured independently of the configuration of the PMG for other positioning methods. In this case, the UE can determine the position and length of the PMG differently according to the indicated positioning method, and when the operation of nested RTT is indicated, it can be determined to use the PMG for the purpose of nested RTT to anticipate the RS burst. For example, the configuration information of the PMG for the purpose of nested RTT may include gap size information to be applied separately from the PMG for other positioning methods. Considering that because the UE supporting nested RTT needs to obtain at least two measurements at different time points, a longer PMG may be required compared to other positioning methods, it can be expected to have the advantageous effect of providing an adaptive PMG size suitable for the situation.

[0190] The advantage of the proposed method is that the PMG-related operations of the UE can be unified by reusing the definition and configuration of the PMG to share with other positioning methods to configure the RS burst.

[0191] (Option 1-2) RS burst configuration method using multiple positioning measurement gaps

[0192] When node A is a node that transmits PRS, one RS burst including two or more PMGs configured by LMF may be regarded as another method of configuring RS burst using PMG. In this case, UE may determine the reception time of PRS calculated for each PMG constituting one RS burst. For example, when the RS burst includes two PMGs, UE may determine the time point at which time 1 is calculated from the previous PMG and the time point at which time 2 is calculated from another PMG.

[0193] Multiple PMGs constituting an RS burst may be configured to different positioning methods, and the configuration of the PMGs used may be shared. To this end, the LMF may determine the target of the PMG provided in the RS burst, and provide configuration information about the PMG to the BS and UE. For example, the configuration information may include configuration information about a reference time point at which the RS burst begins (e.g., parameters such as periodicity and / or offset). Information about a reference time point at which the RS burst ends (e.g., the length of the RS burst) or the number of PMGs provided in the RS burst may be provided in the configuration information. This has the advantage of reducing the waste of configuration overhead by sharing PMG configurations for other positioning methods and unifying UE operations using PMGs.

[0194] A plurality of PMGs constituting an RS burst may be configured to have a form in which the PMG is periodically repeated in a burst-like manner. In this case, the periodicity characteristic may be reused as a periodicity parameter for configuring a PMG of another positioning method, or a periodicity parameter configured separately for a nested RTT may be defined and used. As a detailed method, a structure may be considered in which the position of a PMG determined based on a parameter (e.g., a periodicity parameter) assigned to the periodicity may be configured as the starting PMG position of the RS burst, and N PMGs may be repeatedly generated at a specific interval from the position of the starting PMG. In this case, the size of the specific interval and N may be considered to be a value predetermined by the standard (e.g., a structure in which an additional PMG is generated by connecting to the starting PMG (or with a specific gap)), or may be configured by the LMF and provided as configuration information to the BS and UE. This may be beneficial in reducing the waiting time for the UE to complete the operation of the nested RTT by maintaining and ensuring the interval between time 1 and time 2 while reducing the interval to support efficient operation of the nested RTT.

[0195] The advantage of the proposed approach is that it clearly distinguishes between two or more different time points constructed on an RS burst, while allowing the reuse of existing PMG definitions and configurations.

[0196] The method of constructing repeated transmission of SRS can be regarded as another method of configuring RS bursts. In this case, SRS refers to a reference signal sent from UE to BS based on the 3GPP NR standard, and SRS specifically used for positioning purposes is considered. In the following description, pos-SRS is described as a term representing positioning SRS. Hereinafter, the present disclosure describes the proposed method considering the case where RS bursts are configured using pos-SRS repeated transmission. However, those skilled in the art will understand that the proposed method can generally be applied even in cases other than these, where nested RTT is supported by using other reference signals sent by BS or UE for positioning purposes. As a detailed method, the following options can be selected and used.

[0197] (Option 2-1) RS burst configuration method using pos-SRS repeated transmission

[0198] According to the current NR standard, SRS repetition transmission may be defined as being performed through SRS configuration, but SRS repetition is not used to configure SRS for positioning purposes (hereinafter, pos-SRS).

[0199] According to an embodiment of the present specification, SRS repetition transmission may also be applied to the pos-SRS configuration of the nested RTT. Specifically, when node A is the node that sends the pos-SRS, the RS burst may be configured as a repetition unit of the pos-SRS. In order to indicate the repetition of the pos-SRS, the configuration information of the pos-SRS may include a repetition factor parameter. If the configuration information of the pos-SRS includes a repetition factor and two or more repetitions are configured, and the operation of the nested RTT is indicated by the instruction information, node A may repeatedly send the pos-SRS according to the repetition factor information, and node B may repeatedly receive the pos-SRS according to the repetition factor information. Such repeated pos-SRS may correspond to Fig.10 RS-Ax shown.

[0200] On the other hand, even if a repetition factor is provided in the configuration information of pos-SRS and two or more repetitions are configured, when a positioning method other than nested RTT is indicated by instruction information, it may be determined that repeated transmission of pos-SRS is not performed or the repeated transmission structure of pos-SRS for nested RTT is not followed. This may be suitable for the purpose of sharing the configuration information of pos-SRS with other positioning methods that do not require repeated transmission of pos-SRS, while preventing unnecessary repeated transmission of pos-SRS.

[0201] In the form of configuring repeated transmission of pos-SRS, a specific time gap may be configured between the repeatedly transmitted pos-SRS. For example, when an RS burst is configured with two repeated transmissions of pos-SRS, the transmission / reception point of the first pos-SRS in the RS burst is time 1, and the transmission / reception point of the second pos-SRS is time 2, a time gap of a specific size may be configured between time 1 and time 2, and the position of time 2 may be determined by offsetting the size of the time gap relative to time 1. In this case, the size of the time gap may be defined according to the standard, or determined by the LMF or BS and provided to the node A through configuration information or instruction information. For example, the size of the time gap may be expressed in milliseconds or sub-milliseconds, or may be information expressed in transmission units such as symbols or time slots. As Fig.10 As shown, the time interval configured between the repeated transmissions of pos-SRS can be T b3 related.

[0202] The advantage of the proposed method is that it supports a UE transmitting pos-SRS to act as a node A by defining repeated transmission of pos-SRS configured on RS bursts, while reusing the definition and configuration of the existing pos-SRS.

[0203] Distance measurement between node A and node B

[0204] In order to support nested RTT, a method is proposed to calculate the distance between node A and node B based on information about time domain information to be measured based on RSs sent and received by node A and / or node B. Fig.10 The distance calculation method using the nested RTT structure is illustrated by the example of . However, those skilled in the art will appreciate that the proposed method can generally be applied while maintaining the structural characteristics of the nested RTT.

[0205] Hereinafter, a method for obtaining a propagation delay required for transmitting and receiving a reference signal between a node A and a node B to estimate distance information between the node A and the node B is proposed. In this case, those skilled in the art will understand that the measurement result of the propagation delay of the reference signal is information representing the distance between the two nodes.

[0206] In the structure of nested RTT, a method can be used to estimate the distance information between node A and node B by using the RX-TX time difference information that each node can calculate based on the RS burst and the RS transmission / reception time. In this case, the following transmission / reception timing can be used for the RX-TX time difference used.

[0207] - From the perspective of node A, the time difference (hereinafter, T) between the time when the RS sent by node B is received and the time when the first RS (hereinafter, RS-B) is sent a1 )

[0208] - From the perspective of node A, the time difference (hereinafter, T) between the time when RS-B is received and the time when the second RS (hereinafter, RS-A2) on the RS burst is sent a2 )

[0209] - From the perspective of Node B, the time difference between the time when RS-A1 is received and the time when RS-B is sent (hereinafter, T b1 )

[0210] - From the perspective of Node B, the time difference between the time when RS-A2 is received and the time when RS-B is sent (hereinafter, T b2 )

[0211] When the RX-TX time difference is used, the distance estimation method using the nested RTT may be applied differently according to the structure of transmitting and receiving RS bursts and RSs between Node A and Node B (i.e., the relative time order of transmitting and receiving RS bursts and RSs). Fig.10 When the structure of Case 1 in the example is operated, the magnitude of the propagation delay required to send and receive the reference signal between Node A and Node B can be calculated using the following mathematical expression 3. Fig.10 When the structure of Case 2 in the example is operated, the magnitude of the propagation delay required to transmit and receive the reference signal between Node A and Node B can be calculated using the following Mathematical Expression 4.

[0212] [Formula 3]

[0213]

[0214] [Formula 4]

[0215]

[0216] In the structure of nested RTT, a method of using time information other than the RX-TX time difference may be considered as a method of estimating distance information, and as a specific method, the transmission / reception time difference between RSs within an RS burst may be utilized as follows.

[0217] - From the perspective of node A, the time difference between the time when RS-A1 and RS-A2 on the RS burst are sent (hereinafter, T a3 )

[0218] - From the perspective of Node B, the time difference between the time of receiving RS-A1 and RS-A2 on the RS burst (hereinafter, Tb3 )

[0219] When the transmit / receive time difference between RSs within an RS burst is used, Equation 5 can be derived based on Equations 3 and 4, and regardless of the structure of the nested RTT (i.e., commonly applied to Fig.10 In case 1 and case 2 of the example, the size of the propagation delay required to send and receive the reference signal between node A and node B can be calculated.

[0220] [Formula 5]

[0221]

[0222] How measurement reports are implemented

[0223] To support nested RTT, a method is proposed to calculate and report measurements based on RS bursts and RS sent and received by Node A and / or Node B. The present disclosure below proposes some components to be provided in the measurement report to be performed in the structure of nested RTT, and values ​​other than those mentioned may be provided in the measurement report.

[0224] The node (hereinafter referred to as node L) that calculates the distance between node A and node B and / or ultimately estimates the position of node A or node B needs to be provided with the measurement values ​​measured by node A and node B as information. For example, node L can be an LMF based on the 3GPP NR standard, or can be a UE (including SL UE) used as node A and node B. The information required by node L may include the RX-TX time difference required to apply equation 3, equation 4 and / or equation 5, or the transmit / receive time difference between RSs within an RS burst. In view of this, one of the following options can be selected and used as a specific method for determining the measurement value reported by node A or node B in the nested RTT.

[0225] (Option 3-1) RX-TX time difference

[0226] In the nested RTT structure, node A can measure T a1 and T a2 Node B can measure T b1 and T b2 In this case, node A calculates T a1 and T a2 In the process of calculating T, the same received signal (ie, RS sent by Node B) needs to be used as a reference point. Node B can be configured to calculate T b1 and T b2 The same transmitted signal (ie, the RS transmitted by the Node B) is used as a reference point during the process.

[0227] The proposed method has the advantage of being able to largely reuse the RX-TX time difference reporting method used in the existing RTT method, and also has the advantage of being easily scalable even when the number of RSs selected in the RS burst increases (i.e., even when the number of RX-TX time differences exceeds two).

[0228] (Option 3-2) RX-TX time difference within RS burst + RS time difference

[0229] In a nested RTT structure, node A can be configured to measure T a1 and T a3 Node B can be configured to measure T b1 and T b3 and report these values. Alternatively, node A can be configured to measure T a2 and T a3 Node B can be configured to measure T b2 and T b3 In this case, node A calculates T a1 and T a2 In the process of calculating T, the same received signal (ie, RS sent by Node B) needs to be used as a reference point. Node B can be configured to calculate T b1 and T b2 The same transmitted signal (ie, the RS transmitted by the Node B) is used as a reference point during the process.

[0230] The proposed method replaces an RX-TX time difference result with a transmit / receive time difference value between RSs within an RS burst, and when the range required to represent the transmit / receive time difference value between RSs within an RS burst is smaller than the range required to represent the RX-TX time difference, it can be expected to have a beneficial effect in reducing the signaling overhead for measurement reporting.

[0231] Fig.11 1 is a diagram for explaining the operation of a first device for nesting RTT according to an embodiment. Fig.11 In the example, the first device may be Fig.10 Node A or Node B in.

[0232] Reference Fig.11 , the first device may receive configuration information of a first type of reference signal related to positioning (A05). The configuration information of the first type of reference signal may be received via a network (e.g., a BS / TRP or a positioning-related server). In some embodiments, the configuration information of the first type of reference signal provided from the network may be received via the second device.

[0233] The first device may send a first type of reference signal to the second device multiple times based on the configuration information within a duration including the multiple first time resources (A10). The first device may receive a second type of reference signal related to positioning from the second device in a second time resource located after the duration including the multiple first time resources (A15).

[0234] If through Fig.10 As described, the transmission of the first type of reference signal may be performed multiple times after the reception of the second type of reference signal is first performed. For example, the first device may receive the second type of reference signal related to positioning from the second device in one second time resource, and transmit the first type of reference signal to the second device multiple times based on the configuration information within a duration including multiple first time resources located after the second time resource.

[0235] The reception of the second type of reference signal performed on one second time resource may be related to multiple transmissions of the first type of reference signal. The duration including the multiple first time resources may be determined based on the number of repetitions of the first type of reference signal provided in the configuration information.

[0236] The multiple transmissions of the first type of reference signal and the reception of the second type of reference signal may be related to a round trip time (RTT) measurement.

[0237] The reception of a second type of reference signal performed on a second time resource may be related to multiple RTT measurement values ​​based on the same reception timing (Rx timing). The first device may send a measurement report including multiple RTT measurement values. The measurement report may also include information about the time intervals between the multiple first time resources.

[0238] The plurality of first time resources may be spaced apart from each other in the time domain based on a time interval.

[0239] Information about the time interval may be obtained through a measurement configuration related to positioning.

[0240] The first type of reference signal may be a sounding reference signal (SRS) used for positioning.The first device may be a user equipment (UE).

[0241] The second type of reference signal may be a positioning reference signal (PRS), and the second device may be at least one BS or at least one transmission and reception point (TRP).

[0242] Both the first device and the second device are UEs, and the first type of reference signal and the second type of reference signal may each be a SL reference signal.

[0243] Fig.121 is a diagram for explaining the operation of the second device for nesting RTT according to an embodiment. Fig.12 In the example, the first device may be Fig.10 Node B or Node A in.

[0244] Reference Fig.12 , the second device may send configuration information of a first type of reference signal related to positioning (B05). The configuration information of the first type of reference signal may be provided via a network (eg, BS / TRP or a positioning-related server).

[0245] The second device may receive a first type of reference signal from the second device multiple times based on the configuration information within a duration including the multiple first time resources (B10). The first device may send a second type of reference signal related to positioning to the second device in a second time resource located after the duration including the multiple first time resources (B15).

[0246] If through Fig.10 As described, the reception of the first type of reference signal may be performed multiple times after the transmission of the second type of reference signal is first performed. For example, the second device may transmit the second type of reference signal related to positioning to the first device in one second time resource, and receive the first type of reference signal from the first device multiple times based on the configuration information within a duration including multiple first time resources after the second time resource.

[0247] The transmission of the second type of reference signal performed on one second time resource may be related to multiple receptions of the first type of reference signal. The duration including the multiple first time resources may be determined based on the number of repetitions of the first type of reference signal provided in the configuration information.

[0248] The multiple receptions of the first type of reference signal and the transmissions of the second type of reference signal may be related to a round trip time (RTT) measurement.

[0249] The transmission of a second type of reference signal performed on a second time resource may be related to multiple RTT measurement values ​​based on the same reception timing (Rx timing). The second device may receive a measurement report including multiple RTT measurement values. The measurement report may also include information about the time intervals between the multiple first time resources.

[0250] The plurality of first time resources may be spaced apart from each other in the time domain based on a time interval.

[0251] Information about the time interval may be provided by a measurement configuration related to positioning.

[0252] The first type of reference signal may be a sounding reference signal (SRS) used for positioning.The first device may be a user equipment (UE).

[0253] The second type of reference signal may be a positioning reference signal (PRS), and the second device may be at least one BS or at least one transmission and reception point (TRP).

[0254] Both the first device and the second device are UEs, and the first type of reference signal and the second type of reference signal may each be a SL reference signal.

[0255] Fig.13 1 is a diagram for explaining the operation of an apparatus in a network system for nested RTT according to an embodiment. Fig.13 In the example, the first device may be Fig.10 In the node A or node B, the second device may be Fig.10 Node B or Node A in.

[0256] The first device may send a first type of reference signal to the second device multiple times within a duration including multiple first time resources (C05). The first device may receive a second type of reference signal related to positioning from the second device in a second time resource located after the duration including multiple first time resources (C10). The reception of the second type of reference signal performed on the second time resource may be related to the multiple transmissions of the first type of reference signal. The duration including multiple first time resources may be determined based on the number of repetitions of the first type of reference signal provided in the configuration information.

[0257] Multiple transmissions of the first type of reference signal and reception of the second type of reference signal may be associated with round trip time (RTT) measurements. The RTT measurement is to compensate for errors in the CPM of NR caused by clock drift and may be a nested RTT or a two-sided RTT. Reception of a second type of reference signal performed on a second time resource may be associated with multiple RTT measurements based on the same receive timing (Rx timing).

[0258] The first device may send a measurement report including multiple RTT measurement values ​​(C15). The measurement report may also include information about the time intervals between the multiple first time resources. The measurement report may be sent to the second device, but is not limited thereto. The measurement report may also be sent to a network server, such as a BS / TRP or LMF.

[0259] As described above, the measurement report may include the RX-TX time difference (eg, option 3-1), or may additionally include the RS time difference within an RS burst (eg, option 3-2).

[0260] Based on the measurement report, a propagation delay related to a distance between the first device and the second device may be determined. The propagation delay may be determined based on at least one of Equation 3, Equation 4, and / or Equation 5.

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

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

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

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

[0265] Fig.15 A wireless device suitable for use with the present disclosure is shown.

[0266] Reference Fig.15 , the first wireless device 100 and the second wireless device 200 may transmit radio signals via various RATs (e.g., LTE and NR). Herein, {the first wireless device 100 and the second wireless device 200} may correspond to Fig.14 {wireless device 100x and BS 200} and / or {wireless device 100x and wireless device 100x}.

[0267] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and further include one or more transceivers 106 and / or one or more antennas 108. The processor 102 may control the memory 104 and / or the transceiver 106, and may be configured to implement the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. For example, the processor 102 may process the information in the memory 104 to generate first information / signals, and then transmit a radio signal including the first information / signals through the transceiver 106. The processor 102 may receive a radio signal including second information / signals through the transceiver 106, and then store information obtained by processing the second information / signals in the memory 104. The memory 104 may be connected to the processor 102, and may store various information related to the operation of the processor 102. For example, the memory 104 may store software codes including commands for executing part or all of the processes controlled by the processor 102 or for executing the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. Herein, the processor 102 and the memory 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 106 may be connected to the processor 102 and transmit and / or receive radio signals through one or more antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. The transceiver 106 may be used interchangeably with a radio frequency (RF) unit. In an embodiment of the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0268] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and further include one or more transceivers 206 and / or one or more antennas 208. The processor 202 may control the memory 204 and / or the transceiver 206, and may be configured to implement the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. For example, the processor 202 may process the information in the memory 204 to generate third information / signals, and then transmit a radio signal including the third information / signals through the transceiver 206. The processor 202 may receive a radio signal including fourth information / signals through the transceiver 206, and then store information obtained by processing the fourth information / signals in the memory 204. The memory 204 may be connected to the processor 202, and may store various information related to the operation of the processor 202. For example, the memory 204 may store software codes including commands for executing part or all of the processes controlled by the processor 202 or for executing the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. Herein, the processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 206 may be connected to the processor 202 and transmit and / or receive radio signals through one or more antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. The transceiver 206 may be used interchangeably with an RF unit. In an embodiment of the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0269] In the following, the hardware elements of the wireless devices 100 and 200 will be described in more detail. One or more protocol layers may be implemented by (but not limited to) one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). One or more processors 102 and 202 may generate one or more protocol data units (PDUs) and / or one or more service data units (SDUs) according to the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document. One or more processors 102 and 202 may generate a signal (e.g., a baseband signal) including a PDU, SDU, message, control information, data, or information according to the description, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document, and provide the generated signal to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive a signal (e.g., a baseband signal) from one or more transceivers 106 and 206 and obtain the PDU, SDU, message, control information, data, or information according to the description, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document.

[0270] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. As an example, one or more application specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field programmable gate arrays (FPGAs) may be included in one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed in this document may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204 to be driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods and / or operational flow charts disclosed in this document may be implemented in the form of codes, commands and / or command sets using firmware or software.

[0271] One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, codes, instructions and / or commands. One or more memories 104 and 204 may be configured by read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard disk drive, register, cache memory, computer-readable storage medium and / or a combination thereof. One or more memories 104 and 204 may be located inside and / or outside of one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 by various technologies such as wired or wireless connections.

[0272] One or more transceivers 106 and 206 may send user data, control information and / or radio signals / channels mentioned in the method and / or operation flow chart of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information and / or radio signals / channels mentioned in the description, function, process, proposal, method and / or operation flow chart disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and send and receive radio signals. For example, one or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may send user data, control information or radio signals to one or more other devices. One or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may receive user data, control information or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to send and receive user data, control information and / or radio signals / channels mentioned in the description, functions, processes, proposals, methods and / or operation flow charts disclosed in this document through one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received radio signals / channels, etc. from RF band signals to baseband signals so as to process received user data, control information, radio signals / channels, etc. using one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc. processed using one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more of the transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0273] Fig.16 Another example of a wireless device applicable to the present disclosure is shown. The wireless device can be used according to the usage / service (refer to Fig.14 ) are implemented in various forms.

[0274] Reference Fig.16 , the wireless devices 100 and 200 may correspond to Fig.15The wireless devices 100 and 200 of the present invention may be configured by various elements, components, units / parts and / or modules. For example, each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130 and an additional component 140. The communication unit may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include Fig.15 One or more processors 102 and 202 and / or one or more memories 104 and 204. For example, the transceiver 114 may include Fig.15 The control unit 120 is electrically connected to the communication unit 110, the memory 130, and the additional components 140, and controls the overall operation of the wireless device. For example, the control unit 120 may control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit 130. The control unit 120 may send information stored in the memory unit 130 to the outside (e.g., other communication devices) via the communication unit 110 through a wireless / wired interface, or store information received from the outside (e.g., other communication devices) via the communication unit 110 in the memory unit 130 through a wireless / wired interface.

[0275] The additional components 140 may be configured differently depending on the type of wireless device. For example, the additional components 140 may include at least one of a power supply unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device may be configured in the form of, but not limited to, a robot ( Fig.14 100a), vehicles ( Fig.14 100b-1 and 100b-2), XR devices ( Fig.14 100c), handheld device ( Fig.14 100d), household appliances ( Fig.14 100e), IoT devices ( Fig.14 100f), digital broadcasting terminal, holographic device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate / environmental device, AI server / device ( Fig.14 400), BS( Fig.14 200), network nodes, etc. The wireless device can be used in a mobile or fixed location according to the usage example / service.

[0276] exist Fig.16In the wireless devices 100 and 200, various elements, components, units / parts and / or modules in the wireless devices 100 and 200 may all be connected to each other through a wired interface, or at least a part thereof may be wirelessly connected through the communication unit 110. For example, in each of the wireless devices 100 and 200, the control unit 120 and the communication unit 110 may be wired, and the control unit 120 and the first unit (e.g., 130 and 140) may be wirelessly connected through the communication unit 110. The various elements, components, units / parts and / or modules within the wireless devices 100 and 200 may also include one or more elements. For example, the control unit 120 may be configured by a collection of one or more processors. As an example, the control unit 120 may be configured by a collection of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing unit and a memory control processor. As another example, the memory 130 may be configured by a random access memory (RAM), a dynamic RAM (DRAM), a read-only memory (ROM)), a flash memory, a volatile memory, a non-volatile memory and / or a combination thereof.

[0277] Fig.17 A vehicle or an autonomous vehicle applied to the present disclosure is shown. The vehicle or the autonomous vehicle can be implemented by a mobile robot, a car, a train, a manned / unmanned aerial vehicle (AV), a ship, etc.

[0278] Reference Fig.17 , the vehicle or autonomous driving vehicle 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a drive unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 may be configured as a part of the communication unit 110. Blocks 110 / 130 / 140a to 140d correspond to Fig.16 Block 110 / 130 / 140.

[0279] The communication unit 110 may send and receive signals (e.g., data and control signals) to and from external devices such as other vehicles, BSs (e.g., gNBs and roadside units), and servers. The control unit 120 may perform various operations by controlling elements of the vehicle or autonomous vehicle 100. The control unit 120 may include an electronic control unit (ECU). The drive unit 140a may enable the vehicle or autonomous vehicle 100 to travel on a road. The drive unit 140a may include an engine, a motor, a power system, wheels, brakes, a steering device, etc. The power supply unit 140b may supply power to the vehicle or autonomous vehicle 100, and include a wired / wireless charging circuit, a battery, etc. The sensor unit 140c may obtain vehicle status, surrounding environment information, user information, etc. The sensor unit 140c may include an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, a slope sensor, a weight sensor, a heading sensor, a position module, a vehicle forward / backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a depth sensor, an ultrasonic sensor, a lighting sensor, a pedal position sensor, etc. The autonomous driving unit 140d may implement a technology for maintaining a lane in which the vehicle is traveling, a technology for automatically adjusting a speed (e.g., adaptive cruise control), a technology for autonomously traveling along a determined path, a technology for traveling by automatically setting a path if a destination is set, and the like.

[0280] For example, the communication unit 110 may receive map data, traffic information data, etc. from an external server. The autonomous driving unit 140d may generate an autonomous driving path and a driving plan from the obtained data. The control unit 120 may control the drive unit 140a so that the vehicle or the autonomous driving vehicle 100 may move along the autonomous driving path according to the driving plan (e.g., speed / direction control). In the middle of autonomous driving, the communication unit 110 may aperiodically / periodically obtain the latest traffic information data from the external server and obtain surrounding traffic information data from neighboring vehicles. In the middle of autonomous driving, the sensor unit 140c may obtain vehicle status and / or surrounding environment information. The autonomous driving unit 140d may update the autonomous driving path and driving plan based on the newly obtained data / information. The communication unit 110 may transmit information about the vehicle position, autonomous driving path, and / or driving plan to an external server. The external server may predict traffic information data based on information collected from the vehicle or autonomous driving vehicle using AI technology, etc., and provide the predicted traffic information data to the vehicle or autonomous driving vehicle.

[0281] The above-mentioned embodiments correspond to the combination of elements and features of the present disclosure in a prescribed form. And, unless explicitly mentioned, each element or feature may be regarded as selective. Each element or feature may be implemented in a form that is not combined with other elements or features. In addition, the embodiments of the present disclosure can be implemented by partially combining elements and / or features together. The order of operations described for each embodiment of the present disclosure may be modified. Some configurations or features of an embodiment may be included in another embodiment, or may replace the corresponding configuration or features of another embodiment. And, the embodiment may be configured by combining claims that do not have a clear reference relationship in the attached claims, or may be included as a new claim by modification after submitting the application.

[0282] Those skilled in the art will appreciate that the present disclosure may be implemented in other specific forms other than those described herein without departing from the spirit and essential characteristics of the present disclosure. Therefore, the above-described embodiments should be interpreted as being illustrative in all respects, rather than restrictive. The scope of the present disclosure should be determined by the appended claims and their legal equivalents, rather than by the above description, and all changes falling within the meaning and equivalent scope of the appended claims are intended to be covered therein.

[0283] Industrial Applicability

[0284] The present disclosure is applicable to UE, BS or other devices in a wireless mobile communication system.

Claims

1. A method for sending a signal by a first device in a wireless communication system, the method comprising the following steps: receiving configuration information for a first type of reference signal related to positioning; sending the first type of reference signal to the second device multiple times based on the configuration information within a duration including multiple first time resources; as well as receiving a second type of reference signal related to positioning from the second device in a second time resource located after the time duration including the plurality of first time resources, wherein the reception of the second type of reference signal performed on the one second time resource is related to multiple transmissions of the first type of reference signal, and The duration of the plurality of first time resources is determined based on the number of repetitions of the first type of reference signal included in the configuration information.

2. The method according to claim 1, wherein: The multiple transmissions of the reference signal of the first type and the reception of the reference signal of the second type are related to round trip time (RTT) measurement.

3. The method according to claim 1, wherein: The reception of a second type of reference signal performed on the second time resource is related to a plurality of round trip time (RTT) measurements based on the same reception timing, wherein the reception timing is the Rx timing.

4. The method according to claim 3, further comprising the steps of: A measurement report including the plurality of RTT measurement values ​​is sent.

5. The method according to claim 4, wherein: The measurement report further includes information about time intervals between the plurality of first time resources.

6. The method according to claim 1, wherein: The plurality of first time resources are spaced apart from each other in the time domain based on a time interval.

7. The method according to claim 6, wherein: Information about the time interval is obtained by a measurement configuration related to positioning.

8. The method according to claim 1, wherein: The first type of reference signal is a sounding reference signal SRS used for positioning, and the first device is a user equipment UE.

9. The method according to claim 1, wherein: The second type of reference signal is a positioning reference signal PRS, and the second device is at least one base station BS or at least one transmission and reception point TRP. 10 . A processor-readable recording medium having recorded thereon a program for executing the method according to claim 1 .

11. A first device for wireless communication, the first device comprising: a memory configured to store instructions; as well as a processor configured to perform operations by executing the instructions, The operation of the processor includes: receiving configuration information for a first type of reference signal related to positioning; Sending the first type of reference signal to the second device multiple times based on the configuration information within a duration including multiple first time resources; and receiving a second type of reference signal related to positioning from the second device in a second time resource located after the time duration including the plurality of first time resources, wherein the reception of the second type of reference signal performed on the one second time resource is related to multiple transmissions of the first type of reference signal, and The duration of the plurality of first time resources is determined based on the number of repetitions of the first type of reference signal included in the configuration information.

12. The first device according to claim 11, wherein: The first device is an application specific integrated circuit ASIC or a digital signal processing device.

13. The first device according to claim 11, wherein: The first device is a user equipment UE, a base station BS or a transmission and reception point TRP operating in a wireless communication system based on the 3rd Generation Partnership 3GPP.

14. A method for receiving a signal from a first device by a second device in a wireless communication system, the method comprising the following steps: Sending configuration information for a first type of reference signal related to positioning to the first device; receiving a reference signal of the first type from the first device a plurality of times based on the configuration information within a duration including a plurality of first time resources; as well as sending a second type of reference signal related to positioning to the first device in a second time resource located after the time duration including the plurality of first time resources, wherein the sending of the second type of reference signal performed on the one second time resource is related to multiple receptions of the first type of reference signal, and The duration of the plurality of first time resources is determined based on the number of repetitions of the first type of reference signal included in the configuration information.

15. A second device for wireless communication, the second device comprising: a memory configured to store instructions; as well as a processor configured to perform operations by executing the instructions, The operation of the processor includes: Sending configuration information for a first type of reference signal related to positioning to the first device; receiving a reference signal of the first type from the first device a plurality of times based on the configuration information within a duration including a plurality of first time resources; and sending a second type of reference signal related to positioning to the first device in a second time resource located after the time duration including the plurality of first time resources, wherein the sending of the second type of reference signal performed on the one second time resource is related to multiple receptions of the first type of reference signal, and The duration of the plurality of first time resources is determined based on the number of repetitions of the first type of reference signal included in the configuration information.

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