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

Abstract

A method by which a terminal transmits a sounding reference signal (SRS) for positioning in a wireless communication system and an apparatus therefor are disclosed according to various embodiments. Disclosed are the method and the apparatus, the method comprising the steps of: receiving configuration information including an SRS frequency hopping configuration through an upper layer signaling; receiving first control information for enabling one SRS resource set among the plurality of SRS resource sets; and sending the SRS for positioning in the SRS resource set.

Description

Technical Field

[0001] This disclosure relates to wireless communication systems, and more specifically, to a method and apparatus for transmitting and receiving wireless signals. Background Technology

[0002] Typically, wireless communication systems are evolving to provide communication services such as audio communication and data communication by covering a wider range of areas. Wireless communication is a multiple access system capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmission power, etc.). For example, a multiple access system can be any of the following: 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). Summary of the Invention

[0003] Technical issues

[0004] The purpose of this disclosure is to provide a method and apparatus for transmitting or receiving signals more accurately and efficiently in a wireless communication system.

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

[0006] Technical solution

[0007] According to one aspect, a method for transmitting a sounding reference signal (SRS) for positioning by a user equipment (UE) in a wireless communication system may include the following steps: receiving configuration information including SRS frequency hopping configuration via higher-layer signaling; receiving first control information enabling one of a plurality of SRS resource sets; and transmitting the SRS for positioning within the one SRS resource set. Whether to enable the SRS frequency hopping configuration may be determined based on the first control information enabling an SRS resource set.

[0008] Alternatively, the SRS resource set identifier (ID) of an SRS resource set included in the first control information is an ID that supports SRS frequency hopping, which can enable SRS frequency hopping configuration.

[0009] Alternatively, SRS for positioning can be transmitted based on the SRS frequency hopping configuration corresponding to the SRS resource set ID.

[0010] Alternatively, if the SRS resource set ID of an SRS resource set included in the first control information is an ID that does not support SRS frequency hopping, then SRS frequency hopping configuration may not be enabled.

[0011] Alternatively, the method may further include the following steps: receiving second control information to enable another SRS resource set ID that does not support SRS frequency hopping, and based on the receipt of the second control information, the SRS frequency hopping configuration may be changed from an enabled state to a disabled state.

[0012] Alternatively, for each SRS resource set ID that supports frequency hopping, the configuration information may include different SRS frequency hopping configurations.

[0013] Alternatively, the SRS frequency hopping configuration may include information about the number of hops, the number of symbols in a hop, the bandwidth of a hop, and the number of overlapping resource blocks between hops.

[0014] Alternatively, the first control information can be received via a Media Access Control (MAC) control element (CE).

[0015] Alternatively, the UE can be a RedCap UE with a maximum transmission bandwidth limited to 20MHz.

[0016] According to another aspect, a computer-readable recording medium may be provided, on which a program is recorded for performing the above-described method of transmitting SRS for positioning.

[0017] According to another aspect, a UE can be provided that performs the above-described method of transmitting SRS for positioning.

[0018] According to another aspect, a processing apparatus for controlling a UE to perform the above-described method of transmitting SRS for positioning can be provided.

[0019] According to another aspect, a method for a BS to receive SRS for positioning in a wireless communication system may include the following steps: sending configuration information including SRS frequency hopping configuration to a UE via higher-layer signaling; sending first control information to the UE to enable one of a plurality of SRS resource sets; and receiving SRS for positioning in said one SRS resource set. Whether to enable SRS frequency hopping configuration can be determined based on the first control information enabling said one SRS resource set.

[0020] According to another aspect, a BS can be provided that performs the above-described method of receiving SRS for positioning.

[0021] Beneficial effects

[0022] According to embodiments of this disclosure, signals can be transmitted or received more accurately and efficiently in a wireless communication system.

[0023] The effects to be achieved by the implementation method are not limited to those specifically described above, and those skilled in the art to which the implementation method pertains will gain a clearer understanding of other effects not mentioned herein based on the following detailed description. Attached Figure Description

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

[0025] Figure 1 The physical channel used in the 3rd Generation Partnership Project (3GPP) system, which serves as an exemplary wireless communication system, and the general signal transmission method using it are illustrated.

[0026] Figure 2 The structure of a radio frame is shown.

[0027] Figure 3 The resource grid for the time slot is shown.

[0028] Figure 4 An exemplary mapping of physical channels in a time slot is shown.

[0029] Figure 5 This illustrates an exemplary Physical Downlink Shared Channel (PDSCH) reception and acknowledgment / negative acknowledgment (ACK / NACK) transmission process.

[0030] Figure 6 An exemplary Physical Uplink Shared Channel (PUSCH) transmission process is shown.

[0031] Figure 7 This shows an example of setting a location protocol.

[0032] Figure 8 An example of OTDOA is shown.

[0033] Figure 9 An example of multiple RTTs is shown.

[0034] Figure 10 The process of operating a network node (e.g., an upper-layer node of a user equipment (UE), a location management function (LMF), etc.) according to an implementation method is illustrated.

[0035] Figure 11 The UE operation procedure for performing positioning measurements is shown.

[0036] Figure 12 Various Integrated Sensing and Communication (ISAC) environments are shown.

[0037] Figure 13 and Figure 14 This is a diagram illustrating the method for configuring frequency hopping for SRSp.

[0038] Figure 15 and Figure 16 This diagram illustrates the method by which a UE sends an SRSp based on configuration information for the SRSp.

[0039] Figure 17 This is a diagram illustrating the method by which the UE sends SRS for positioning.

[0040] Figure 18 This is a diagram illustrating the method by which a BS receives SRS for positioning.

[0041] Figures 19 to 22 Examples of communication system 1 and wireless device applicable to this disclosure are shown. Detailed Implementation

[0042] The embodiments of this disclosure are applicable to various radio 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 radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented as radio technologies such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rate GSM Evolution (EDGE). OFDMA can be implemented as radio technologies such as IEEE 802.11 (Wireless Fidelity (Wi-Fi)), IEEE 802.16 (Global Microwave Access Interoperability (WiMAX)), IEEE 802.20, and Evolved UTRA (E-UTRA). UTRA is part of the Universal Mobile Telecommunications System (UMTS). The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of Evolved UMTS using E-UTRA (E-UMTS), and LTE-Advanced (A) is an evolution of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolution of 3GPP LTE / LTE-A.

[0043] As more and more communication devices require greater communication capacity, there is a need for enhanced mobile broadband communications compared to traditional radio access technologies (RATs). Furthermore, the ability to provide various services anytime, anywhere by connecting multiple devices and objects is another important consideration for next-generation communications. Communication system designs considering reliability and latency-sensitive services / UEs are also being discussed. Therefore, the introduction of new radio access technologies incorporating enhanced mobile broadband (eMBB), massive MTC, and ultra-reliable low-latency communication (URLLC) is being discussed. In embodiments of this disclosure, for simplicity, this technology will be referred to as NR (New Radio or New RAT).

[0044] As used herein, the term "base station" may be replaced by terms such as fixed station, Node B, gNode B (gNB), access point (AP), cell, transmit and receive point (TRP), etc. The term "repeater" may be replaced by terms such as relay node (RN), relay station, etc. The term "terminal" may be replaced by terms such as user equipment (UE), mobile station (MS), mobile subscriber station (MSS), subscriber station (SS), etc.

[0045] For the sake of brevity, this disclosure primarily describes 3GPP NR, but the technical concepts herein are not limited thereto.

[0046] For background information, definitions of terms and abbreviations related to this disclosure, the following references may be incorporated by way of citation.

[0047] -38.211: Physical Channel and Modulation

[0048] -38.212: Multiplexing and Channel Coding

[0049] -38.213: Physical layer process used for control

[0050] -38.214: Physical layer procedures for data

[0051] -38.215: Physical layer measurement

[0052] -38.300: General Description of NR and NG-RAN

[0053] -38.304: User Equipment (UE) Procedures in Idle Mode and RRC Inactive State

[0054] -38.321: Media Access Control (MAC) Protocol Specification

[0055] -38.331: Radio Resource Control (RRC) Protocol Specification

[0056] -37.213: Introduces channel access procedures for unlicensed spectrum for NR-based access.

[0057] -36.355: LTE positioning protocol

[0058] -37.355: LTE positioning protocol

[0059] Terms and abbreviations

[0060] -5GC: 5G Core Network

[0061] -5GS: 5G system

[0062] -AoA: Angle of Arrival

[0063] -AP: Access Point

[0064] -CID: Cell ID

[0065] -E-CID: Enhanced Cell ID

[0066] -GNSS: Global Navigation Satellite System

[0067] GPS: Global Positioning System

[0068] -LCS: Location Services

[0069] -LMF: Location Management Function

[0070] -LPP: LTE Location Protocol -MO-LR: Mobile Initiated Location Request -MT-LR: Mobile Termination Location Request -NRPPa: NR Location Protocol A

[0071] -OTDOA: Observed Time Difference of Arrival -PDU: Protocol Data Unit -PRS: Positioning Reference Signal -RRM: Radio Resource Management -RSSI: Received Signal Strength Indicator -RSTD: Reference Signal Time Difference -ToA: Time of Arrival -TP: Transmitter Point -TRP: Transmitter and Receiver Point -UE: User Equipment -SS: Search Space -CSS: Common Search Space -USS: UE-Specific Search Space -PDCCH: Physical Downlink Control Channel -PDSCH: Physical Downlink Shared Channel -PUCCH: Physical Uplink Control Channel -PUSCH: Physical Uplink Shared Channel Enjoy Channel - DCI: Downlink Control Information - UCI: Uplink Control Information - SI: System Information - SIB: System Information Block - MIB: Master Information Block - RRC: Radio Resource Control - DRX: Discontinuous Receiver - RNTI: Radio Network Temporary Identifier - CSI: Channel State Information - PCell: Primary Cell - SCell: Secondary Cell - PSCell: Primary SCG (Secondary Cell Group) Cell - CA: Carrier Aggregation - WUS: Wake-up Signal - TX: Transmitter - RX: Receiver - RSTD: Reference Signal Time Difference - RS: Reference Signal - PRS: Positioning Reference Signal

[0072] -SRS: Probe Reference Signal

[0073] In a wireless communication system, a user equipment (UE) receives information from a base station (BS) via a downlink (DL) and transmits information to the BS via an uplink (UL). The information transmitted and received by the BS and UE includes data and various control information, and involves various physical channels depending on the type / purpose of the information transmitted and received by the UE and BS.

[0074] Figure 1The physical channel used in a 3GPP NR system and the general signal transmission method using it are shown.

[0075] 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 procedure (e.g., establishing synchronization with the BS). For this purpose, 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 the cell identifier (ID). The UE can obtain broadcast information within the cell based on the PBCH. During the initial cell search process, the UE can receive a DL reference signal (RS) to monitor the DL channel status.

[0076] After the initial cell search, in step S102, the UE can obtain more specific system information by receiving the Physical Downlink Control Channel (PDCCH) and receiving the Physical Downlink Shared Channel (PDSCH) based on the information in the PDCCH.

[0077] In steps S103 to S106, the UE may perform a random access procedure to access the BS. For random access, the UE may send a preamble to the BS on the Physical Random Access Channel (PRACH) (S103) and receive a response message for the preamble on the PDCCH and the corresponding PDSCH (S104). In the case of contention-based random access, the UE may further perform a contention resolution procedure by sending a PRACH (S105) and receiving the PDCCH and the corresponding PDSCH (S106).

[0078] Following the aforementioned process, the UE can receive the PDCCH / PDSCH (S107) and transmit the Physical Uplink Shared Channel (PUSCH) / Physical Uplink Control Channel (PUCCH) (S108), as part of the 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 Acknowledgment / Nack Acknowledgment (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 transmitted on the PUCCH, it can be transmitted on the PUSCH when control information and service data need to be transmitted simultaneously. Additionally, UCI can be transmitted aperiodically via the PUSCH according to network requests / commands.

[0079] Figure 2The radio frame structure is shown. In NR, uplink and downlink transmissions are configured in frames. Each radio frame is 10ms long and is divided into two 5ms half-frames (HF). Each half-frame is further divided into five 1ms subframes (SF). Subframes are 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 using a normal CP, each time slot includes 14 OFDM symbols. When using an extended CP, each time slot includes 12 OFDM symbols.

[0080] Table 1 illustrates, for example, how the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to SCS when using normal CP.

[0081] [Table 1]

[0082] <![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

[0083] *N slot symb Number of symbols in a time slot

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

[0085] *N subframe,u slot Number of time slots in a subframe

[0086] Table 2 shows the number of symbols per slot, the number of slots per frame, and the number of slots per subframe that vary according to SCS when using extended CP.

[0087] [Table 2]

[0088] <![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

[0089] The frame structure is only an example. The number of subframes, time slots, and symbols in a frame can vary.

[0090] In NR systems, OFDM parameter sets (e.g., SCS) can be configured differently for multiple cells aggregated for a single UE. Therefore, the (absolute time) duration of time resources (e.g., SF, time slots, or TTI) (referred to as time units (TU) for simplicity) consisting of the same number of symbols can be configured differently among the aggregated cells. Here, symbols can include OFDM symbols (or CP-OFDM symbols) and SC-FDMA symbols (or Discrete Fourier Transform-Extended-OFDM (DFT-s-OFDM) symbols).

[0091] Figure 3The resource grid shows a time slot. A time slot comprises multiple symbols in the time domain. For example, when using a normal CP, a time slot comprises 14 symbols. However, when using an extended CP, a time slot comprises 12 symbols. A carrier comprises multiple subcarriers in the frequency domain. A resource block (RB) is defined as multiple consecutive subcarriers in the frequency domain (e.g., 12 consecutive subcarriers). A bandwidth portion (BWP) can be defined as multiple consecutive physical RBs (PRBs) in the frequency domain and corresponds to a single set of parameters (e.g., SCS, CP length, etc.). A carrier can include up to N (e.g., five) BWPs. Data communication can be performed through enabled BWPs, and only one BWP can be enabled for a UE. In the resource grid, individual elements are called resource elements (REs), and a complex symbol can be mapped to individual REs.

[0092] Figure 4 This illustrates an example of mapping physical channels within a time slot. In an NR system, a frame is characterized by a self-contained structure consisting of a DL control channel, DL or UL data, and a UL channel, all of which can be included within a single 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 the DL control region), and the last M symbols of the time slot can be used to carry a UL channel (e.g., PUCCH) (hereinafter referred to as the UL control region). Each of N and M is an integer equal to or greater than 0. The resource region between the DL control region and the UL control region (hereinafter referred to as the data region) can be used to transmit DL data (e.g., PDSCH) or UL data (e.g., PUSCH). The guard period (GP) provides a time gap for switching from transmit mode to receive mode or from receive mode to transmit mode. Some symbols in a subframe during a DL-to-UL handover can be configured as GP.

[0093] The PDCCH transmits DCI. For example, the PDCCH (i.e., DCI) may carry information about the transmission format and resource allocation of the DL-SCH, resource allocation information for the Uplink Shared Channel (UL-SCH), paging information for the PCH, system information for the DL-SCH, resource allocation information for higher-layer control messages (e.g., RARs transmitted on the PDCCH), transmission power control commands, and information about enabling / releasing configured schedules. The DCI includes Cyclic Redundancy Check (CRC). The CRC is masked using various identifiers (IDs) (e.g., Radio Network Temporary Identifiers (RNTIs)) depending on the owner or purpose of the PDCCH. For example, if the PDCCH is used for a specific UE, the CRC is masked using the UE ID (e.g., Cell-RNTI (C-RNTI)). If the PDCCH is used for paging messages, the CRC is masked using the Paging-RNTI (P-RNTI). If the PDCCH is used for system information (e.g., System Information Block (SIB)), the CRC is masked using the System Information RNTI (SI-RNTI). When the PDCCH is used for RAR, the CRC is masked using the Random Access-RNTI (RA-RNTI).

[0094] Figure 5 This illustrates an exemplary PDSCH reception and ACK / NACK transmission process. (Refer to...) Figure 5 The UE can 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 offset K0 to the PDSCH and the PDSCH-HARQ-ACK reporting offset K1. After receiving the PDSCH in time slot #(n+K0) according to the scheduling information of time slot #n, the UE can transmit a UCI on the PUCCH in time slot #(n+K1). The UCI can include a HARQ-ACK response to the PDSCH. When the PDSCH is configured to carry at most one TB, the HARQ-ACK response can be configured in one bit. When the PDSCH is configured to carry at most two TBs, the HARQ-ACK response can be configured in 2 bits if spatial binding is not configured, and in 1 bit if spatial binding is configured. When time slot #(n+K1) is designated as the timing for HARQ-ACK transmission of multiple PDSCHs, the UCI transmitted in time slot #(n+K1) includes HARQ-ACK responses to multiple PDSCHs.

[0095] Figure 6 An exemplary PUSCH transmission process is shown. (Refer to...) Figure 6The UE can detect the PDCCH in time slot #n. The PDCCH includes DL scheduling information (e.g., DCI format 1_0 or 1_1). The UE can then send the PUSCH in time slot #(n+K2) based on the scheduling information in time slot #n. The PUSCH includes the UL-SCH TB.

[0096] SRS (Sound Reference Signal)

[0097] The SRS is a UL reference signal transmitted by the UE and received by the BS. Based on the SRS, the BS can perform operations such as link adaptation, DL channel estimation based on channel reciprocity, UL beam management, UL precoding, and / or UL measurement acquisition.

[0098] The UE can receive SRS configuration information (e.g., TS38.331 SRS-Config IE) provided by the BS and determine the parameters for SRS transmission based on this. The SRS configuration consists of lists of SRS-Resources, SRS-PosResources, SRS-ResourceSets, and SRS-PosResourcesets, where SRS-ResourceSets and SRS-PosResourcesets each include sets of SRS-Resources and SRS-PosResources, respectively.

[0099] Based on the configuration and transmission methods of time resources, SRS can be classified into three resource types.

[0100] When the resource type is set to periodic, the UE determines the location to send the SRS resource configured via RRC based on the configured period and offset, and sends the SRS periodically without separate signaling when configured.

[0101] When the resource type is set to semi-persistent, the UE determines the location to transmit the SRS resource configured via RRC based on the configured period and offset. Then, when SRS transmission is enabled via MAC CE, the UE begins periodic transmission of the indicated SRS. When transmission is disabled via MAC CE, the UE stops transmitting SRS.

[0102] When the resource type is set to aperiodic, the UE considers transmitting the indicated SRS by means of the offset configured by the RRC relative to the position of the DCI receiving timing that indicates the triggering of the corresponding SRS resource set.

[0103] position

[0104] Location refers to determining the geographic location and / or speed of a UE based on measurements of radio signals. Location information may be requested and reported by clients (e.g., applications) associated with the UE. Location information may also be requested by clients within or connected to the core network. Location information may be reported in a standard format (e.g., cell- or geographic coordinate-based format) along with estimation errors of the UE's location and speed and / or the location method used for positioning.

[0105] Figure 7 This is a diagram illustrating exemplary positioning protocol configurations for locating a UE to which various implementations are applicable.

[0106] Reference Figure 7 The LTE Positioning Protocol (LPP) can be used as a point-to-point protocol between a location server (E-SMLC and / or SLP and / or LMF) and a target device (UE and / or SET) to locate the target device using location-related measurements obtained from one or more reference resources. The target device and the location server can exchange measurement and / or location information based on signal A and / or signal B via LPP.

[0107] NRPPa can be used for information exchange between reference sources (access nodes and / or BS and / or TP and / or NG-RAN nodes) and location servers.

[0108] The NRPPa protocol provides the following functions.

[0109] - E-CID location information transmission. This function allows the reference source to exchange location information with the LMF for E-CID positioning.

[0110] - OTDOA Information Transmission. This function allows the reference source to exchange information with the LMF for OTDOA positioning.

[0111] - Reporting of general error conditions. This function allows you to report general error conditions for which feature-specific error messages have not yet been defined.

[0112] Supported positioning methods in NG-RAN may include GNSS, OTDOA, E-CID, barometric pressure sensor positioning, WLAN positioning, Bluetooth positioning, TBS, and uplink time difference of arrival (UTDOA). Although any one positioning method can be used for UE positioning, two or more positioning methods may be used for UE positioning.

[0113] OTDOA (Observational Time Difference of Arrival)

[0114] Figure 8 This is a diagram illustrating various implementations of the Observation Time Difference of Arrival (OTDOA) positioning method.

[0115] The OTDOA positioning method uses time measurements of DL signals received by the UE from multiple TPs, including eNB, ng-eNB, and PRS-only TPs. The UE uses location-aided data received from a location server to measure the time of the received DL signals. The UE's location can be determined based on this measurement result and the geographic coordinates of neighboring TPs.

[0116] A UE connected to a gNB can request a measurement gap from a TP to perform OTDOA measurements. If the UE does not know the SFN of at least one TP in the OTDOA auxiliary data, the UE can use an autonomous gap to obtain the SFN of the OTDOA reference cell before requesting a measurement gap for performing Reference Signal Time Difference (RSTD) measurements.

[0117] Here, RSTD can be defined as the minimum relative time difference between the boundaries of two subframes received from the reference cell and the measurement cell. That is, RSTD can be calculated as the relative time difference between the start time of 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 can be selected by the UE.

[0118] For accurate OTDOA measurement, it is necessary to measure the Time of Arrival (ToA) of signals received from three or more geographically distributed TPs or BSs. For example, the ToA of each of 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 can be calculated based on the three ToA values. A geometric hyperbola is determined based on the calculated RSTD values, and the intersection point of the hyperbolas can be estimated as the location of the UE. In this case, the accuracy and / or uncertainty of the individual ToA measurements may arise, and depending on the measurement uncertainty, the estimated location of the UE may be referred to as a specific range.

[0119] For example, the RSTD of two TPs can be calculated based on Equation 1 below.

[0120] [Formula 1]

[0121]

[0122] In Equation 1, c is the speed of light, {x t ,y t} represents the (unknown) coordinates of the target UE, {x i ,y i {x1, y1} are the (known) coordinates of TP, and {x1, y1} are the coordinates of the reference TP (or another TP). Here, (T i -T1) is the transmission time offset between two TPs, called the "True Time Difference" (RTD), n in1 and n2 are the UE ToA measurement error values.

[0123] E-CID (Enhanced Cell ID)

[0124] In the Cell ID (CID) location method, the UE's location can be measured based on the geographic information of the UE's serving ng-eNB, serving gNB, and / or serving cell. For example, the geographic information of the serving ng-eNB, serving gNB, and / or serving cell can be obtained through paging, registration, etc.

[0125] In addition to the CID positioning method, the E-CID positioning method may utilize additional UE measurements and / or NG-RAN radio resources to improve UE location estimation. Although the E-CID positioning method may partially utilize the same measurement methods as the measurement control system on the RRC protocol, it typically does not perform additional measurements solely for UE location measurement. In other words, additional measurement configuration or measurement control messages may not be provided for UE location measurement. The UE does not expect to request additional measurement operations solely for location measurement, and the UE may report measurements obtained through normally measurable methods.

[0126] For example, the serving gNB can use the E-UTRA measurement values ​​provided by the UE to implement the E-CID positioning method.

[0127] For example, the measurement elements that can be used for E-CID positioning are as follows.

[0128] -UE Measurements: E-UTRA Reference Signal Received Power (RSRP), E-UTRA Reference Signal Received Quality (RSRQ), UE E-UTRA Receive (Rx) - Transmit (Tx) Time Difference, GERAN / WLAN Reference Signal Strength Indication (RSSI), UTRAN Common Pilot Channel (CPICH) Received Signal Code Power (RSCP), and / or UTRAN CPICH Ec / Io

[0129] -E-UTRAN Measurement: ng-eNB Rx-Tx Time Difference, Timing Advance (T) ADV ) and / or AoA

[0130] Here, T ADV It can be divided into type 1 and type 2 as follows.

[0131] T ADV Type 1 = (ng-eNB Rx-Tx time difference) + (UE E-UTRA Rx-Tx time difference)

[0132] T ADV Type 2 = ng-eNB Rx-Tx time difference

[0133] AoA can be used to measure the orientation 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 can be north. The eNB / TP can use UL signals such as SRS and / or DMRS for AoA measurement. The accuracy of AoA measurement increases with the arrangement of the antenna array. When the antenna array is arranged at the same interval, the signals received at adjacent antenna elements can have a constant phase rotation.

[0134] UTDOA (Uplink Time Difference of Arrival)

[0135] UTDOA is a method for determining the location of a UE by estimating the arrival time of the SRS. When calculating the estimated SRS arrival time, the serving cell can be used as a reference cell to estimate the UE's location by the time difference with another cell (or base station / TP). To implement UTDOA, the E-SMLC can indicate the serving cell of the target UE so that the target UE can be instructed to send SRS. Additionally, the E-SMLC can provide configurations such as periodic / aperiodic SRS, bandwidth, and frequency / group / sequence hopping.

[0136] Multiple RTTs (Round Trip Time)

[0137] Figure 9 This is a diagram illustrating exemplary multiple round-trip time (multiple RTT) positioning methods to which various implementations are applicable.

[0138] Reference Figure 9 (a) illustrates an exemplary RTT procedure in which an initiating device and a responding device perform a ToA measurement, and the responding device provides the ToA measurement to the initiating device for use in RTT measurement (calculation). The initiating device may be a TRP and / or a UE, and the responding device may be a UE and / or a TRP.

[0139] The initiating device can send an RTT measurement request, and the responding device can receive the RTT measurement request (1301).

[0140] The initiating device can send the RTT measurement signal at t0, and the responding device can acquire the ToA measurement at t1 (1303).

[0141] The responding device can send an RTT measurement signal at t2, and the initiating device can acquire the ToA measurement at t3 (1305).

[0142] The responding device can send information about [t2-t1], and the initiating device can receive this information and calculate the RTT using Equation 2 (1307). Information can be sent and received based on a separate signal or in the RTT measurement signal (1305).

[0143] [Equation 2]

[0144] RTT = t3 - t0 - [t2 - t1]

[0145] Reference Figure 9 (b) RTT can correspond to double the distance between two devices. Positioning estimation can be performed from the corresponding information, and multi-point positioning can be used for positioning estimation. d1, d2, and d3 can be determined based on the measured RTT, and the position of the target device can be determined as the intersection of the circumferences of circles with radii d1, d2, and d3 centered on BS1, BS2, and BS3 (or TRP), respectively.

[0146] NG-RAN positioning architecture and process

[0147] Figure 10 This illustrates the location structure of a next-generation (NG) radio access network (RAN). NG RAN can also be referred to as NR RAN or 5G RAN.

[0148] The AMF may receive requests for location services related to a specific target UE from other entities (e.g., a Gateway Mobility Center (GMLC) or a UE), or may decide to initiate location services on behalf of a specific target UE (e.g., in the case of an IP Multimedia Subsystem (IMS) emergency call). The AMF may then forward the location service request to the LMF. The LMF may process the location service request, which may include sending auxiliary data to the target UE for UE-based and / or UE-assisted positioning and / or target UE positioning. The LMF sends the location service results (e.g., UE location estimate) to the AMF. When other entities (e.g., a GMLC or a UE) request location services, the AMF sends the location service results to those other entities.

[0149] NG-RAN nodes can control TRP / TP (e.g., RRM or DL-PRS TP only) to support PRS-based terrestrial beacon systems (TBS).

[0150] LMF can connect to Enhanced Services Mobile Location Center (E-SMLC) to access Universal Terrestrial Radio Access Network (UTRAN) information.

[0151] LMF can be connected to a Secure User Plane Positioning (SUPL) positioning platform (SLP) responsible for positioning relative to the user plane.

[0152] Figure 11 This shows an example of location services supported in NG-RAN.

[0153] When the UE is in the Connection Management Idle (CM-IDLE) state, if the AMF receives a location service request, the AMF executes a network-triggered service request to configure signaling for connecting to the UE and allocating a specific service gNB / ng-eNB. Figure 11 In this case, it is assumed that the UE is in connected mode.

[0154] A location service request to the UE can be triggered, and this request to the UE can be one of steps 1101, 1102, and 1103. For example, an entity in the 5GC (e.g., GMLC) can request location services (e.g., location) for the target UE from the serving AMF (1101). Alternatively, the serving AMF can trigger location services for the target UE itself (e.g., locating the UE for an emergency call) (1102). Furthermore, the UE can request location services (e.g., location or assisted data transfer) from the serving AMF at the NAS level (1103).

[0155] AMF forwards the location service request to LMF (1104).

[0156] LMF provides services in NG-RAN to obtain location measurements or auxiliary data and initiates positioning procedures with neighboring ng-eNB / gNB (1105).

[0157] (Instead of step 1105 or other than step 1105) The LMF initiates a positioning process with the UE to obtain a location estimate or positioning measurement or to send location assistance data to the UE (1106).

[0158] The LMF provides the AMF with a location service response (1107) (e.g., success or failure, and if successful, a location estimate for the UE).

[0159] (In step 1101) AMF provides a location service response (1108) to the 5GC entity (e.g., UE location estimation).

[0160] (In step 1102) AMF supports the service (1109) triggered in step 1102 based on the location service response received in step 1107 (e.g., providing the GMLC with a location estimate related to the emergency call).

[0161] (In step 1103) AMF provides the UE with a location service response (1110) (e.g., UE location estimation).

[0162] SRS (Sound Reference Signal) used for positioning

[0163] In the Rel.15NR system, periodic, non-periodic, and semi-persistent Rel.15SRS can be transmitted for UL relative time of arrival (UL RTOA), UL SRS-RSRP, and UL-AOA measurements at the BS, thereby supporting UL TDOA and UL AOA.

[0164] In the Rel.16 / 17NR system, periodic, non-periodic, and semi-persistent SRSs for positioning can be transmitted for UL RTOA, UL SRS-RSRP, UL-AOA, and gNB Rx-Tx time difference measurements at the BS, thereby supporting UL TDOA, UL AOA, and multiple RTTs.

[0165] The RRC parameters are configured differently depending on the intended use of the SRS. For example, for an SRS used for positioning, the configuration is indicated by SRS-PosResources and SRS-PosResourceSet. For an SRS used for other purposes (e.g., Rel.15 SRS), the configuration is indicated by SRS-Resources and SRS-ResourceSet.

[0166] In the following text, to avoid confusion between an SRS used for positioning and an SRS used for other purposes, an SRS used for positioning is referred to as an SRSp, and an SRS used for other purposes (e.g., beam management) is referred to as an SRS-m. In the new proposals of this disclosure discussed below, unless otherwise stated, an SRS may be interpreted as an SRSp.

[0167] The standard document defines the use of resource grids (e.g., Figure 3 This describes a method for mapping SRS resources in the time / frequency domain. For SRS-m, intra-slot repetition is configurable, and intra-slot frequency hopping is supported. However, for SRSp, intra-slot repetition cannot be configured according to the current NR standard (Rel-17), and intra-slot frequency hopping is not supported. For periodic / semi-persistent SRS-m, inter-slot frequency hopping is supported in a periodic manner.

[0168] SRSp configuration can be provided based on the UE's serving cell (or camped cell), and the SRSp sent by the UE based on the SRSp configuration can be received by one or more cells (or TRPs) including the serving cell.

[0169] As an example, an SRSp can be configured using the RRC parameters SRS-PosResourceSet and SRS-PosResource as defined in the TS 38.331 standard. Specifically, when configuring the higher-level parameter SRS-PosResource and the higher-level parameter SpatialRelationInfoPos for an SRS (i.e., an SRSp), the ID of the configuration field of the reference RS is provided. The reference RS can be an SRS, CSI-RS, SS / PBCH block, DLPRS of the serving cell, or DL ​​PRS configured in the SS / PBCH block, configured by the higher-level parameters SRS-Resource or SRS-PosResource.

[0170] The UE does not expect to transmit multiple SRS resources with different spatial relationships on the same OFDM symbol.

[0171] If the higher-layer parameter SpatialRelationInfoPos is not configured, the UE can use a fixed spatial domain transmission filter or different spatial domain transmission filters to transmit SRSps configured by the higher-layer parameter SRS-PosResource across multiple SRS resources.

[0172] In RRC_CONNECTED mode, the UE transmits SRSp configured by the higher-layer parameter SRS-PosResource within the active UL BWP.

[0173] The high-level parameter SpatialRelationInfoPos provided for each SRSp resource provides only one RS source.

[0174] In the case of operation on the same carrier, if an SRSp conflicts with a scheduled PUSCH, the SRSp is discarded on the symbol where the conflict occurs.

[0175] The UE does not expect to configure SRSPosResource on the carrier of the serving cell in a slot format consisting of DL / UL symbols that are not configured for PUSCH / PUCCH transmission.

[0176] Depending on the UE's capabilities, SRSp resources associated with the initial UL BWP can be configured, and in RRC_INACTIVE mode, these SRSp resources are transmitted within the initial UL BWP with the same CP and SCS configured for the initial UL BWP. Depending on the UE's capabilities, SRSp resources for positioning can be configured outside the initial BWP in RRC_INACTIVE mode, and frequency location, bandwidth, SCS, and CP length can be configured for SRSp transmission. SRSp resources configured outside the initial BWP in RRC_INACTIVE mode are configured with the same bandwidth and CC as the initial UL BWP.

[0177] ISAC (Integrated Sensing and Communication)

[0178] Various methods for using wireless sensing are being widely discussed in recent wireless communication systems. Traditional radar technology is typically considered for wireless sensing. However, there may be constraints associated with radar technology used for sensing, as it is dedicated to sensing and may not take into account communication characteristics. Additionally, transmitting and receiving nodes may require separate devices to transmit and receive signals for wireless sensing. To address these issues, methods for using wireless sensing in wireless communication systems supporting cellular networks (e.g., 5G and / or next-generation 6G) are being actively researched. These methods include, for example, Integrated Sensing and Communication (ISAC) or Joint Communication and Sensing (JCAS).

[0179] In 3GPP standardization, research has begun on supporting ISAC in 5G / 6G. According to TR22.837 published by 3GPP SA1 WG, wireless sensing is defined as a technology that uses radio waves to measure distance, angle, or instantaneous velocity to obtain information about the environment and / or surrounding objects. Scenarios where sensing and communication share the same frequency band and hardware are being considered. Alternatively, methods for sharing or reusing radio waves intended for communication (e.g., RS for communication, such as SSB, DMRS, CSI-RS, and / or SRS) for sensing, or methods for designing separate radio waves for wireless sensing, are also being considered.

[0180] Typically, wireless sensing supported in ISAC involves the processing of signals transmitted from a transmitter being reflected by a target object and received by a receiver. Different sensing modes can be defined depending on the relationship between the transmitter and receiver. Based on whether the transmitter and receiver are matched, a matched transmitter and receiver mode is defined as a single static sensing mode, while a mismatched transmitter and receiver mode is defined as a dual static sensing mode.

[0181] Figure 12 This shows an example of the wireless sensing modes supported in ISAC.

[0182] Reference Figure 12 Considering the transmit and receive operations in the 3GPP standard and the nodes involved, the sensing modes can be roughly classified as follows.

[0183] (a) BS single static sensing mode: The BS that transmits radio waves receives the reflected signal.

[0184] (b) BS to BS dual static sensing mode: another BS receives the reflected signal of the radio waves sent by a specific BS.

[0185] (c) BS to UE Dual Static Sensing Mode: The UE receives the reflected signal of the radio waves sent by the BS.

[0186] (d) UE single static sensing mode: The UE that transmits radio waves receives the reflected signal.

[0187] (e) UE to UE dual static sensing mode: another UE receives the reflected signal of a radio wave transmitted by a specific transmitting UE.

[0188] (f) UE to BS dual static sensing mode: The BS receives the reflected signal of the radio waves transmitted by the UE.

[0189] In addition to the six use cases mentioned above, sensing modes that include multiple transmitting / receiving nodes can be referred to as multi-static sensing modes.

[0190] Wireless sensing applications via ISAC / JCAS are being considered in various scenarios. Typically, wireless sensing is considered to acquire information about a target without a communication module (or independently of a communication module). For example, many scenarios can be broadly categorized into three types.

[0191] (1) Object detection and tracking: This scenario aims to detect target objects or people and track their location information. For example, consider scenarios such as intrusion detection in indoor / outdoor environments, tracking the location of unmanned vehicles (UAVs) or automated guided vehicles (AGVs), and supporting autonomous driving.

[0192] (2) Environmental monitoring: This scenario aims to collect information about the surrounding environment of the sending / receiving nodes. For example, consider scenarios such as rainfall observation and flood detection.

[0193] (3) Motion monitoring: This scenario aims to detect the movement of a target. For example, a scenario that distinguishes between human movement or gestures could be considered.

[0194] The performance metrics and levels required for each of the above scenarios can vary and differ from one another. To design appropriate ISAC / JCAS for the required quality of service in each scenario, various critical performance requirements need to be considered. In 3GPP standard TS 22.137, the critical performance requirements for each service scenario are defined as follows: positioning estimation accuracy, velocity estimation accuracy, reliability (confidence level), sensing resolution, false alarm probability, maximum sensing service latency, and refresh rate. The required levels for each critical performance requirement can vary depending on the service scenario.

[0195] Because radio frequency (RF) sensing does not require a connection to an object via a network device, object localization services can be provided without such a device. The ability to obtain range, velocity, and angle information from RF signals allows for a wide range of new functionalities, such as object sensing, object (e.g., vehicle, human, animal, UAV) identification, high-precision localization, tracking, and activity recognition. Wireless sensing services can provide information to various industries (e.g., autonomous vehicles, smart homes, V2X, factories, railways, public safety, etc.), enabling applications such as intruder detection, assisted driving and navigation, trajectory tracking, collision avoidance, traffic control, and health and traffic management. In some cases, wireless sensing can employ non-3GPP sensors (e.g., radar, cameras) to additionally support 3GPP-based sensing. For example, the operation of wireless sensing services (i.e., sensing operation) may depend on the transmission, reflection, and scattering processing of wireless sensing signals. Therefore, wireless sensing offers opportunities to enhance traditional communication systems from communication networks to wireless and sensing networks.

[0196] Reduced Capability (RedCap) UE

[0197] Recently, in addition to the main 5G use cases (mMTC, eMBB, and URLLC), use cases spanning mMTC and eMBB or mMTC and URLLC have received increasing attention, leading to a growing demand for UEs that efficiently support these use cases in terms of device cost, power consumption, and form factor. In this disclosure, a UE used for this purpose can be defined as a (NR) Reduced Capability (RedCap) UE / device. Besides RedCap devices, a general NR UE supporting all or one or more main 5G use cases can be defined as an NR (Normal) UE / device or a non-RedCap UE / device. A RedCap UE can be a UE that intentionally reduces some of the key 5G capabilities defined in IMT-2020 (maximum data rate, user experience data rate, latency, mobility, connection density, energy efficiency, spectrum efficiency, and regional service efficiency) to achieve low device cost / complexity, low power consumption, small form factor, etc.

[0198] In this disclosure, for convenience, the 5G usage area spanning mMTC and eMBB or mMTC and URLLC, which is the target usage area for the Redcap device, is referred to as the Redcap usage area. A Redcap usage area can be, for example:

[0199] (1) Connecting industries

[0200] 1) Sensors and actuators can be connected to 5G networks and the core.

[0201] -Including usage and requirements of large-scale industrial wireless sensor networks (IWSN)

[0202] - Requiring very high-performance URLLC services and relatively low-cost services for small devices with a battery life of several years.

[0203] - The requirements for the corresponding services are higher than those for Low Power Wide Area (LPWA), i.e., LTE-M / NB-IoT, but lower than those for URLCC and eMBB.

[0204] Devices in these environments include: pressure sensors, humidity sensors, thermometers, motion sensors, accelerometers, actuators, etc.

[0205] 2) Smart Cities

[0206] The vertical sectors of smart cities include data collection and processing for more efficient monitoring and control of urban resources and for providing services to city residents. In particular, surveillance camera deployment is an essential component not only in smart cities but also in factories and industrial sites.

[0207] 3) Wearable

[0208] Wearable use cases can include smartwatches, rings, electronic health-related devices, and medical monitoring devices. One characteristic of this use case is the small size of the devices.

[0209] Low-power wireless area (LPWA) UEs (e.g., LTE-M or NB-IoT) may not support Redcap use cases in terms of bit rate, latency, etc. NR UEs may functionally support Redcap use cases, but may be inefficient in terms of manufacturing cost, form factor, and battery life. Supporting these use cases in 5G networks with redcap UEs that have characteristics such as low cost, low power, and small form factor can lead to reduced UE manufacturing and maintenance costs. Redcap use cases can have very diverse requirements in terms of UE complexity, target bit rate, latency, and power consumption. These redcap requirements can be divided into (general) requirements that apply to all redcap use cases and (use case-specific) requirements that apply only to specific use cases. Some representative general and use case-specific requirements are defined as shown in Table 3 below.

[0210] [Table 3]

[0211]

[0212] The above redcap requirements can be satisfied by various features (combinations) provided by the UE and BS. The following shows examples of features and sub-features supported by the UE / BS that satisfy the redcap requirements.

[0213] ->Features that reduce complexity:

[0214] - The number of UE RX / TX antennas has been reduced.

[0215] -UE bandwidth reduced

[0216] - Half-duplex FDD

[0217] -Relaxed UE processing time

[0218] -Relaxed UE processing capabilities

[0219] -> Saves electricity:

[0220] - Reduced PDCCH monitoring due to fewer BD and CCE limits

[0221] -Extended DRX for RRC inactivity and / or idle

[0222] - RRM relaxation for fixed installations

[0223] ->Coverage restoration / enhancement

[0224] Frequency hopping (FH) of SRS used for positioning

[0225] Beyond traditional portable UEs, 3GPP has been advancing standardization and technology development to support a variety of devices, including MTC / NB-IoT terminals. As one of these technologies, Reduced Capability (RedCap) NR was introduced in Rel-17. RedCap NR achieves cost-effectiveness by reducing the capabilities of traditional NR, is less sensitive to data rates, and has lower latency requirements. UEs supporting RedCap can include wearable devices, industrial wireless sensors, and video surveillance, and achieve capability benefits by reducing the supported bandwidth, maximum number of MIMO layers, modulation order, and Rx branches, and by supporting half-duplex (HD) across all frequency bands.

[0226] The target requirements for positioning accuracy of RedCap UEs in the current 3GPP NR Rel-18 standard are as follows, and most experimental results do not meet the target performance requirements in Table 4 below. Compared with normal UEs, UEs supporting traditional NR support smaller maximum frequency bandwidths, which may lead to performance degradation in terms of decoding / detection accuracy of transmitted and received reference signals. Therefore, UL SRS frequency hopping is being discussed in Rel-18 to improve the positioning accuracy of RedCap UEs. As a result of testing SRS-based positioning accuracy with frequency hopping pattern-related factors (e.g., UE speed, time gap between adjacent hops, and overlapping application), it was identified that SRS-based positioning accuracy performance decreases as UE speed increases, and applying overlapping improves SRS-based positioning accuracy performance.

[0227] [Table 4]

[0228] Commercial use IIoT usage Horizontal positioning accuracy For 90% of UEs (<3m) For 90% of UEs (<1m) Vertical positioning accuracy For 90% of UEs (<3m) For 90% of UEs (<3m)

[0229] In light of these characteristics and problems, methods such as frequency hopping operation and associated signaling are proposed below to support improved accuracy performance of UL-based SRS-based positioning for RedCap UEs. Furthermore, although the proposed methods are described in the context of UL-based positioning in 3GPP NR systems, those skilled in the art will understand that these methods are not limited to UL-based positioning and can generally be applied to other positioning techniques that determine location by estimating the distance or orientation between the transmitter and the UE. Therefore, it is apparent that the proposed methods can be applied to all types of transmission / reception methods and positioning techniques anticipated by the BS and UE, provided that the principles of this disclosure are not departed from.

[0230] Although the proposed methods are described below in the context of SRS as a reference signal in a 3GPP NR system, those skilled in the art will understand that these methods are not limited to SRS and can generally be applied to other reference signals transmitted and received for communication between the BS and UE. Therefore, it will be apparent that the proposed methods can be applied to all types of transmission / reception methods and reference signals anticipated by the BS and UE, provided that they do not depart from the principles of this disclosure.

[0231] Furthermore, the proposed methods can be applied in combination. Each proposed method can operate independently without needing to be combined separately, or one or more proposed methods can be combined to operate in an integrated manner. Some terms, symbols, and sequences used to describe this disclosure may be replaced with other terms, symbols, or sequences, as long as the principles of this disclosure are maintained.

[0232] [Method 1] A combination of existing SRSp resource configuration methods and new frequency hopping configuration methods

[0233] To support improved SRS-based positioning accuracy for RedCap UEs, a method is proposed to dynamically control the frequency hopping pattern when performing frequency hopping operations within the virtual bandwidth of the signal transmitted from the UE to the BS. Furthermore, a frequency hopping method supporting overlapping phase compensation between hops is proposed.

[0234] In certain scenarios (e.g., the NR Rel-17 standard), the RRC configuration of the SRS can be included in the active BWP configuration information, and the SRSp resource set and resource-related configurations can be included in the RRC configuration. In some scenarios, frequency hopping of MIMO SRS resources is supported / configured by the RRC configuration information, but the RRC configuration information for the SRSp resource / set does not include parameters related to the frequency hopping configuration. Therefore, an RRC configuration method may be needed to support frequency hopping operations for SRS (SRSp) resources used for positioning that are not supported in this scenario. For example, a new RRC parameter or information element (IE) including relevant configuration information can be defined for the frequency hopping operation of SRSp resources. This newly defined parameter or IE can include information for configuring the frequency hopping operation, the BWP ID, and the SRSp resource ID, which can be used to specify the SRSp resource to be applied to the corresponding frequency hopping operation configuration.

[0235] The following describes a method for configuring RRC settings related to frequency hopping. In the following description, the term UE may refer to RedCap UE.

[0236] 1. RRC configuration related to frequency hopping

[0237] (1) Method for configuring RRC configuration information related to frequency hopping

[0238] New parameters or IEs can be defined for frequency hopping-related configuration information. Specifically, a method can be considered to define explicit parameters (e.g., the number of hops and hop bandwidth (BW)) that indicate the frequency hopping pattern in association with existing SRP resource configuration information. For example, in the specific scenario described above, the frequency domain position and BW of the SRP resource can be assigned using the C-SRS value, frequency domain shift value, and transmission comb offset parameter included in the RRC configuration information of the SRP resource. In this case, the assigned values ​​of the frequency domain position and BW of the SRP resource can be regarded as the starting position and total system BW of the entire frequency hopping operation, and the number of hops and the BW of each hop can be configured by separately defining the number of hops and the BW of each hop in relation to the frequency hopping configuration. Alternatively, in this configuration method, the offset of the first hop can be fixed, or a stepped frequency hopping pattern can be configured. In this case, the transmission overhead of the RRC parameters in the RRC configuration related to the frequency hopping configuration can be reduced.

[0239] (2) Configuration related to overlap operations

[0240] Figure 13 and Figure 14 This is a diagram illustrating the method for configuring frequency hopping for SRSp.

[0241] For ease of description, the BW that can transmit SRSp / SRSp resources via frequency hopping in the UE's SRS positioning-frequency hopping (SRSp-FH) operation is defined as the SRSp BW, and the BW of each hop in the UE's SRSp-FH operation is defined as the hop BW.

[0242] When supporting overlap technology during frequency hopping to improve UE positioning accuracy, the frequency hopping-related RRC configuration may also include configuration information related to overlap operations. The configuration related to overlap operations can be performed by setting the number of overlapping RBs between hops in the frequency domain, and the configuration information related to overlap operations can be included as optional information in new parameters defined in the aforementioned frequency hopping-related RRC configuration information.

[0243] Reference Figure 13 (a) SRSp resources can be frequency-hopped based on RRC configuration related to frequency hopping. In this document, each block represents an SRSp resource, FC201 represents the starting position of SRSp-FH in the frequency domain, and FC202 represents the SRSp BW as the total BW of SRSp-FH. FC201 and FC202 can be configured using existing position and / or BW information configured for SRSp resources. FC203 represents the BW of each hop (hop BW), and FC204 represents the overlapping frequency portion between adjacent hops. FC203 (and / or FC201 and FC202) can be configured with new parameters defined in the aforementioned frequency-hopping related RRC configuration information, and FC204 can be configured optionally. Figure 13The frequency hopping operation shown in (a) is for the convenience of description, except that Figure 13 Apart from the example in (a), the proposed method can be applied to SRSp / SRSp resource transmission with frequency hopping without limitation.

[0244] (3) Operations related to the total BW (or SRSp BW) configuration

[0245] The total BW of an SRSp-FH can be configured by reusing parameters currently supported for configuring the BW of SRSp resources in a specific scenario, by directly defining new parameters, or implicitly configured by a combination of related parameters configured by other SRSp-FHs. Although the values ​​(or RRC parameter values) set by the above methods are described as limited to the total BW value for performing SRSp-FH operations, the total BW can also be set based on the maximum and / or minimum values ​​corresponding to the total BW. Alternatively, the total BW can be set considering the BW constraints that SRSp resources can transmit (e.g., the range of UL carriers allowed for UL transmission).

[0246] The following describes in detail a method for controlling the transmission of certain hops so that they do not exceed the range of the total BW (the SRSp BW that allows SRSp-FH transmission). The control method may include the following steps: discarding at least one hop outside the range of the SRSp BW; reassigning said at least one hop to another frequency location; and / or discarding or reassigning said at least one hop based on the magnitude and location of the SRSp-FH frequency that the UE intends to transmit at. Each control method will be described in detail below in Options 1, 2, and 3.

[0247] 1) Option 1: Discard jumps outside the SRSp-FH BW range

[0248] To prevent hops from exceeding the SRSp BW range, the UE may discard at least one hop outside the SRSp BW from the multiple hops configured / assigned for the SRSp BW, and transmit the remaining hops within the SRSp BW range according to the assigned frequency position / size. To discard at least one hop outside the SRSp BW range, a first discarding method of discarding the hop itself or a second discarding method of discarding only the PRBs outside the transmission BW within the hop may be considered. The first and second discarding methods will be described separately in Options 1-1 and 1-2.

[0249] A. Option 1-1

[0250] In multi-hop configuration / assignment for SRSp BW, at least one hop outside the SRSp BW can be completely discarded, while hops within the SRSp BW can be transmitted according to their respective assigned frequency positions and sizes. This ensures that even when frequency hopping is applied to SRSp, SRSp / SRSp resources are transmitted only within the SRSp BW.

[0251] Reference Figure 13 (b) The UE can perform frequency hopping for SRSp resources and transmit SRSp / SRSp resources in each block (SRSp resource). As mentioned above, SRSp BW FC301 is the SRSp BW that can be used for SRSp-FH transmission, and hop BW FC302 is the hop BW for each hop. SRSp BW FC301 and hop BW FC302 can be configured by the RRC configuration parameters as described above. In addition, overlapping BW FC303 refers to the overlapping frequency portion between adjacent hops and can optionally be configured via RRC configuration.

[0252] For example, in option 1-1, when the UE performs an SRSp-FH transmission indicated / configured by the BS, all PRBs included in a specific hop (e.g., FC304) other than SRSp BWFC301 can be discarded. In this case, the remaining hops other than the specific hop FC304 can be transmitted at their assigned / configured frequency positions and BWs. Figure 13 The frequency hopping operation shown in (b) is for the convenience of description, except that Figure 13 Apart from the example in (b), option 1-1 can be applied to transmissions of SRSp / SRSp resources with frequency hopping without limitation.

[0253] B. Options 1-2

[0254] The UE can discard some PRBs outside the SRSp BW of at least one hop from the multi-hop configuration for the proposed SRSp-FH transmission. In this document, a PRB can be a PRB outside the range (or boundary) of the SRSp BW among the PRBs configured for at least one hop. Furthermore, hops / PRBs assigned / configured within the SRSp BW of the SRSp-FH in the multi-hop configuration can be transmitted according to their assigned frequency location and size.

[0255] Specifically, refer to Figure 13 (c) allows configuration of SRSp BW FC305 and hop BW FC306. Each block can be an assigned SRSp resource. SRSp BW / hop BW / SRSp resources can be configured by parameters in the RRC configuration. Additionally, overlapping BW FC307 refers to the overlapping frequency portion between adjacent hops and can optionally be configured via the RRC configuration.

[0256] In specific examples of options 1-2, the UE can perform SRSp transmission in multiple hops according to the SRSp-FH indicated by the BS. In this multi-hop configuration, the first hop FC308 and the second hop FC310 can be outside the SRSp BW FC305. In this case, the second hop FC310 can be completely discarded, except for the first hop FC308 which crosses the boundary of the SRSp BW FC305. For the first hop FC308, if the number of RBs within the SRSp BW FC305 is greater than or equal to a specific number of RBs (e.g., 4 RBs), only the RBs outside the SRSp BW FC305 can be partially discarded. Conversely, if the number of RBs within the SRSp BW FC305 is less than the specific number of RBs (e.g., 4 RBs), the entire first hop FC308 can be discarded. Figure 13 The frequency hopping operation shown in (c) is for the convenience of description, except that Figure 13 Apart from the example in (c), options 1-2 can be applied to transmissions of SRSp / SRSp resources with frequency hopping without limitation.

[0257] The approach of Option 1 (Option 1-1 and / or Option 1-2) may be advantageous in reducing UE complexity, multiplexing gain of multiple UEs and / or minimizing the negative impact of SRSp-FH operation on other data transmission / reception.

[0258] 2) Option 2: A method of reassigning hops outside the SRSp bandwidth in the frequency domain.

[0259] In Option 2, hops outside the SRSp BW can be reassigned to different frequency locations within the SRSp BW range. Hops within the SRSp BW range can be transmitted according to their assigned frequency location and size. Reassignment methods (reassigning hops outside the SRSp BW range to other frequency locations within the SRSp BW range) may include: a first reassignment method, reassigning the hop to the frequency location of the next nearest hop in the time domain; a second reassignment method, reassigning the hop to a frequency location adjacent to the frequency location of the next farthest hop in the frequency domain; and a third reassignment method, reassigning the hop to a frequency location adjacent to the relative boundary of the boundary that the hop in the SRSp BW has exceeded. The first, second, and third reassignment methods will be described in detail in Options 2-1, 2-2, and 2-3, respectively.

[0260] A. Option 2-1

[0261] The UE can transmit SRSp resources in multiple hops based on SRSp-FH operation. Specifically, refer to... Figure 14In (a), FC311 can represent the SRSp BW that can be used for SRSp-FH transmission, and FC312 can represent the hop BW of each hop. As mentioned above, FC311 and FC312 can be configured by RRC parameters related to SRSp-FH operation. FC313 refers to the overlapping BW between adjacent hops and can optionally be configured by RRC parameters related to SRSp-FH operation.

[0262] For example, refer to Figure 14 (a) When the UE sends SRSp resources for SRSp-FH operation indicated / assigned by the application BS, it may reassign at least one hop FC314 other than SRSp BW FC311. The UE may reassign the frequency resources of at least one hop FC314 based on the frequency location of the hop FC315 closest to at least one hop FC314 in the time domain.

[0263] Option 2-1 can reduce UE complexity through RF retuning. In some cases, it can also reduce handover intervals, thereby reducing the total transmission time of SRSp-FH operation. This can reduce the negative impact on data transmission.

[0264] B. Option 2-2

[0265] The UE can transmit SRSp resources in multiple hops based on SRSp-FH operation. Specifically, refer to... Figure 14 In (b), FC321 can represent the SRSp BW that can be used for SRSp-FH transmission, and FC322 can represent the hop BW of each hop. As mentioned above, FC321 and FC322 can be configured by RRC parameters related to SRSp-FH operation. FC323 refers to the overlapping BW between adjacent hops and can optionally be configured by RRC parameters related to SRSp-FH operation.

[0266] For example, refer to Figure 14 (b) When the UE transmits SRSp resources for SRSp-FH operation indicated / assigned by the application BS, it may reassign at least one hop FC324 other than SRSp BW FC321. The UE may reassign the frequency resources of at least one hop FC324 based on the frequency position of the hop FC325 that is farthest from at least one hop FC324 in the frequency domain. In this document, the overlapping frequency resources between at least one hop FC324 and hop FC322 may correspond to the aforementioned overlapping BW.

[0267] Option 2-2 has the advantage of maintaining positioning accuracy performance without using additional time / frequency resources.

[0268] C. Options 2-3

[0269] The UE can transmit SRSp resources in multiple hops based on SRSp-FH operation. Specifically, refer to... Figure 14 (c) FC331 can represent the SRSp BW that can be used for SRSp-FH transmission, and FC332 can represent the hop BW of each hop. As mentioned above, FC331 and FC332 can be configured by RRC parameters related to SRSp-FH operation. FC333 refers to the overlapping BW between adjacent hops and can optionally be configured by RRC parameters related to SRSp-FH operation.

[0270] For example, refer to Figure 14 (c) When the UE transmits SRSp resources for SRSp-FH operation indicated / assigned by the application BS, it may reassign at least one hop FC334 other than SRSp BW FC331. The UE may reassign the frequency resources of at least one hop FC334 based on the frequency position of the relative boundary FC337 of the boundary FC336 exceeded by at least one hop FC334 of the SRSp BW. For example, at least one hop FC334 may be reassigned to FC335.

[0271] The advantage of options 2-3 is that they allow for measurements over a wider frequency band.

[0272] 3) Option 3: Determine whether to discard or reassign hops outside the SRSp BW range based on the frequency magnitude and location of SRSp-FH.

[0273] In SRSp transmission based on SRSp-FH, the UE can consider the frequency magnitude and location of SRSp-FH and discard or reassign hops outside the SRSp BW range in the frequency domain.

[0274] In Option 3, when at least one hop in a multi-hop SRSp transmission based on SRSp-FH is outside the SRSp BW, the UE may perform an operation based on Option 1 or Option 2 depending on whether there are available frequency resources where the at least one hop might actually be located. For example, when the SRSp transmission based on SRSp-FH is outside both the upper and lower bounds of the SRSp BW, the UE may discard all of the at least one hop outside the SRSp BW. Alternatively, when the SRSp transmission based on SRSp-FH is outside the lower bound but not outside the upper bound of the SRSp BW, the UE may determine whether to discard or reassign the at least one hop based on the difference between the highest frequency location performing the SRSp transmission and the upper bound of the SRSp BW (hereinafter, the first difference) and the difference between the hop BW and the overlapping BW (hereinafter, the second difference). For example, when the first difference is greater than (or equal to) the second difference, the UE may reassign the at least one hop to a frequency location adjacent to the other hop with the highest frequency. Alternatively, when the first difference is less than (or lower than) the second difference, the UE may discard the at least one hop.

[0275] Alternatively, the UE may anticipate that some or all of the multiple hops in the frequency hopping pattern associated with SRSp-FH (a frequency hopping pattern determined by a combination of the hop BW, the number of hops, and the number of overlapping PRBs between adjacent hops) will not exceed the range of the SRSp BW.

[0276] The following describes in detail the method by which a UE performs SRSp-FH related operations based on at least one of the above SRSp-FH related options (Options 1 to 3). The following SRSp-FH operations can be configured only for RedCap UEs.

[0277] Figure 15 and Figure 16 This diagram illustrates the method by which a UE sends an SRSp based on its configuration information.

[0278] Reference Figure 15 The UE can receive configuration information of SRSp resources provided by the BS (S151). When the UE is a RedCap UE, it can also receive frequency hopping FH configuration information related to the SRSp resources from the BS (or the FH configuration information can be included separately in the SRSp resource configuration information). In this case, the UE can anticipate the transmission operation of the SRSp resources based on the FH configuration information. The UE can use the BWP ID and SRSp resource ID information configured / indicated in the FH configuration information to determine the frequency hopping pattern (S153) and perform the transmission operation for the SRSp resources for which the frequency hopping pattern is applied (S155). Specifically, the UE can apply the parameter values ​​of the FH configuration information to the SRSp resources according to the existing frequency domain resource configuration information of the SRSp resources to calculate the frequency position and BW of the frequency hopping. The UE can transmit the SRSp resources at the frequency resource position configured / indicated at the SRSp resource transmission time configured / indicated in the SRSp resource configuration information.

[0279] Reference Figure 16 The BS can provide the UE with configuration information for the SRSp resources indicated by the Location Management Function (LMF). When the UE is a RedCap UE, the BS can determine the frequency hopping pattern to be used / applied to SRSp transmission via a separate RRC message / signal (S161) and send configuration information related to the frequency hopping pattern to the UE (S163). Subsequently, the BS can receive the SRSp resources sent from the UE at the configured / indicated frequency resource location at the configured / indicated SRSp resource transmission time (S165). The BS can calculate positioning-related measurements by combining the SRSp / SRSp resources corresponding to each hop and report the measurements to the LMF.

[0280] When using method 1 above, the LMF may optionally send frequency hopping operation-related configuration information additionally through the BS. The LMF can receive reports of location-related measurements of SRSp resources sent from the UE from the BS, and calculate / estimate the UE's location based on the measurements.

[0281] Therefore, Method 1 has the advantage of saving resources (or RRC signaling resources) by reusing existing SRPp resource configuration methods. Furthermore, frequency-hopping-based SRPp resource transmissions can be initiated in the UL active BWP band by following the SRPp resource configuration included in the UL active BWP. In this case, the handover delay associated with frequency hopping can be significantly reduced.

[0282] [Method 2] A method for dynamically indicating SRSp resources and SRSp FH.

[0283] In Method 2, to support improvements in SRS-based positioning accuracy for RedCap UEs, frequency hopping enable / disable or frequency hopping patterns are dynamically indicated for the transmission signals from the UE to the BS.

[0284] As previously mentioned, the frequency band width (BW) supported by the RedCap UE is smaller than that of a normal UE (e.g., the RedCap UE supports a BW of 5MHz or 20MHz). In this case, to achieve gain from the combination of positioning-related signals, the RedCap UE can transmit positioning-related signals over a wider virtual BW range than the supported BW via frequency hopping. In this document, the virtual BW range may refer to the total frequency BW (or the aforementioned SRSp BW) when a single SRS resource (hereinafter, SRSp resource) used for positioning is transmitted via frequency hopping in the frequency domain, or the frequency BW that includes the transmission of all hops.

[0285] Virtual frequency ranges can be configured in various ways. For example, the UL BWP supported in the current NR standard can be configured / indicated to be wider than the maximum supported frequency BW of the RedCap UE. In this case, the RedCap UE can perform frequency hopping for SRSp resources within the UL BWP to transmit SRSp resources (or the RedCap UE can perform RF handover operations to perform frequency hopping). For this purpose, a method for configuring SRSp resources / SRSp resource sets can be defined. For example, the frequency hopping operation of SRSp resources / SRSp resource sets can be performed based on the frequency hopping configuration method described above, or it can be omitted. In this case, since characteristics such as the RedCap UE speed, channel state with the BS, or target positioning performance may change, dynamic indication of frequency hopping enable / disable or dynamic indication of frequency hopping patterns (for SRSp resources / SRSp resource sets) between the BS and the RedCap UE may be required. For example, the BS can dynamically indicate the enable / disable of frequency hopping considering the RedCap UE's speed and positioning performance, channel state related to the RedCap UE, etc.

[0286] In this document, a frequency hopping pattern can be a concept that includes elements (or parameters) such as the number of hops, the placement pattern of hops in the frequency domain, the bounding width (BW) of the hops, the overlap size, and / or the time interval between adjacent hops. Alternatively, a frequency hopping pattern can be defined by a combination of at least one of the above elements. Although for the sake of convenience, the following description will be given in the context of a frequency hopping pattern based on the above elements, it can be applied to all types of elements related to frequency hopping patterns.

[0287] The following section will describe in detail the dynamic indication of frequency hopping information via the Media Access Control (MAC) control element (CE).

[0288] 1. A method for dynamically instructing SRSp resources and the application of SRSp FH via MAC-CE.

[0289] In specific 5G scenarios, MAC CE, a key MAC component, helps manage connection control and data transmission between the device and the 5G NR network. MAC CE primarily controls data frames to manage data transmission / reception between the UE and the network, and manages UEs connected to the network and determines data transmission permissions for specific UEs. These functions of MAC CE contribute to improving the performance, efficiency, and stability of the 5G NR network. MAC CE functions include SRS transmission / reception, and it is used to manage the control information required to select the desired frequency band and modulation scheme during SRS transmission / reception processing.

[0290] When dynamically instructing SRSp resource frequency hopping operations via MAC CE, an SRSp resource dynamic instruction method can be used, or the dynamic instruction method for SRSp resource frequency hopping operations can be executed separately from the SRSp resource dynamic instruction method. The former will be described in detail in Option 1, and the latter will be described in detail in Option 2.

[0291] (1) Option 1: Use the SRSp resource dynamic indication method

[0292] Option 1 could be a method of dynamically controlling pre-configured frequency hopping-related configurations (hereinafter, frequency hopping configurations) using the SRS resource set ID field in a traditional MAC CE for enabling / disabling semi-persistent (SP) positioning SRS. Therefore, the method of using the SRS resource set ID field could include a first dynamic indication method defining a virtual ID and a second dynamic indication method classifying existing SRS resource set IDs according to whether frequency hopping is supported, for dynamic indication. The first dynamic indication method will be described in Option 1-1, and the second dynamic indication method will be described in Option 1-2.

[0293] 1) Option 1-1: A method of mapping SRP resource sets and frequency hopping indicators by defining virtual IDs in the SRP resource set ID.

[0294] In specific scenarios, 4 bits are allocated to the SRS resource set ID field of the SP positioning SRS enable / disable MAC CE to support up to 16 resource set IDs. Virtual IDs used to dynamically indicate the application of frequency hopping can be assigned / mapped to some of the 4 bits in the SRS resource set ID field. These virtual IDs can be mapped to the resource set ID to which frequency hopping operation will be applied and to configuration information related to the frequency hopping pattern. In this case, dynamic frequency hopping indication can be performed together with dynamic indications for enabling / disabling some SRS resource sets using traditional MAC CE.

[0295] In option 1-1, the BS can indicate the activation (or deactivation) of the virtual ID to the UE via the SP-located SRS enable / deactivation MAC CE. In this case, the UE can enable (or deactivate) frequency hopping operations of the SRS resource set based on the SRS resource set mapped to the virtual ID and the frequency hopping pattern configuration information.

[0296] 2) Option 1-2: Methods for classifying and configuring SRSp resource set IDs to support / not support frequency hopping.

[0297] In specific scenarios, up to 16 resource set IDs per BWP can be supported. In options 1-2, some of the up to 16 resource set IDs can be assigned to SRS resource sets that support frequency hopping, and the remaining IDs can be assigned to SRS resource sets that do not support frequency hopping. In this case, the enabling / disabling of SRS resource sets and frequency hopping can be dynamically indicated to the UE via a traditional MAC CE (SRS Enable / Disable MAC CE). In this document, SRS resource sets that support frequency hopping can be mapped to frequency hopping pattern-related configuration information to be applied by RRC configuration. When a frequency hopping-supporting SRS resource set is enabled via MAC CE, the UE can apply frequency hopping to the SRS resource set using the frequency hopping pattern-related configuration information configured for that SRS resource set.

[0298] In Option 1 (Options 1-1 and / or Option 1-2), the UE can obtain configuration information for the SRSp resource set provided by the BS. After obtaining the configuration information, the BS can simultaneously indicate to the UE the activation / deactivation of the SRSp resource set and the activation / deactivation of frequency hopping for the SRSp resource set based on the SRSp resource set ID field of the MAC CE. When frequency hopping is enabled, the UE can determine / configure the frequency hopping pattern for the enabled SRSp resource set based on the frequency hopping pattern-related configuration information pre-configured / mapped for the enabled SRSp resource set ID via RRC signaling. The UE can perform SRSp resource transmission in a semi-persistent type based on the SRSp resource set enabled via MAC CE by applying the frequency hopping pattern corresponding to the SRSp resource set. In this case, the UE can perform SRSp resource set transmission using the enabled frequency hopping pattern until reconfigured via RRC message (e.g., reconfiguration of frequency hopping pattern-related configuration information) or via a new indication from the MAC CE (e.g., an indication to enable the SRSp resource set ID mapped to different frequency hopping pattern-related configuration information).

[0299] Alternatively, in Option 1 (Option 1-1 and / or Option 1-2), the BS may send configuration information of the frequency-hopping SRSp resource set indicated by the LMF to the UE. Based on the UE's status information and / or dynamic control request information received from the UE, the BS may configure / indicate the activation / deactivation of the SP SRSp resource set via MACCE, and also instruct the activation / deactivation of the frequency hopping pattern of the SP SRSp resource set. The UE may receive the SRSp resource set based on the frequency hopping pattern dynamically indicated by the MACCE (if an existing frequency hopping pattern exists, it is changed / adjusted to the frequency hopping pattern dynamically indicated by the MACCE). The BS may combine the hops of the received SP SRSp resource set to perform positioning-related measurements and report the measurement information to the LMF.

[0300] Alternatively, in Option 1 (Option 1-1 and / or Option 1-2), the LMF can send SRSp resource set configuration information to the UE via the BS. The LMF can receive location-related measurements from the BS using the SRSp resource set sent from the UE, and use the reported measurements to calculate / estimate the UE's location.

[0301] Therefore, the proposed method according to option 1 has the advantage of significantly reducing the signaling load or feedback overhead of the MAC CE, since it still uses the traditional MAC CE and does not define a separate new MAC CE.

[0302] (2) Option 2: A method that is executed separately from the SRSp resource dynamic indication method

[0303] In Option 2, the dynamic indication of frequency hopping can be performed separately from the traditional SP positioning SRS enable / disable MAC CE through a newly defined MAC CE. For example, an ID field including the SRP resource set ID and / or SRP resource ID is defined in the newly defined MAC CE, and the MAC CE can indicate the SRP resource set and / or SRP resource to which frequency hopping pattern-related configuration information will be applied. Alternatively, the frequency hopping pattern-related configuration information to be applied to the SRP resource set and / or SRP resource can be indicated by another field defined for the newly defined MAC CE. The frequency hopping pattern-related configuration information may include information about the number of hops, hop BW, the number of overlapping RBs between hops, etc., and, depending on the UE's capabilities, additionally includes information related to the time interval between hops.

[0304] In Option 2, the UE can receive configuration information for the SRSp resource set and / or SRSp resources from the BS. The UE can receive SRSp enable / disable indications via MAC CE sent from the BS, and dynamically receive frequency hopping operation enable / disable indications via a newly defined MAC CE. Based on the MAC CE, the UE can configure / determine whether to perform frequency hopping for the enabled SRSp resource set and / or SRSp resources, and the frequency hopping pattern to be applied, and send the SRSp resource set and / or SRSp resources in a semi-persistent type. In this case, the UE can perform SRSp resource set and / or SRSp resource transmission using the enabled frequency hopping pattern until reconfigured via RRC messages or indicated by a new MAC CE.

[0305] Alternatively, in Option 2, the BS may send configuration information of the frequency-hopping SRSp resource set indicated by the LMF to the UE. Based on the UE's status information or dynamic control request information received from the UE, the BS may configure dynamic control information for the SP SRSp resource set and send dynamic control information of the frequency hopping pattern of the SP SRSp resource set and / or SRSp resources to the UE via a newly defined MAC CE. The BS may perform reception operations for the SRSp resource set and / or SRSp resources based on the frequency hopping pattern according to the dynamic control information. After receiving the dynamic indication, the BS may receive the SRSp resource set and / or SRSp resources based on the adjusted frequency hopping pattern. The BS may combine the hops of the received SRSp resource set and / or SRSp resources to perform positioning-related measurements and report the measurements to the LMF.

[0306] In Option 2, the LMF can send configuration information of the SRSp resource set to the UE via the BS. The LMF can receive positioning-related measurements from the BS using the SRSp resource set sent from the UE, and calculate / estimate the UE's location based on the reported measurements.

[0307] In Option 2, the proposed disclosure can dynamically indicate the enabling / disabling of frequency hopping operations for all supported SRSp resource sets and / or SRSp resources in a specific scenario, thereby flexibly maximizing the utilization of SRSp resources.

[0308] Although Method 2 has been described above with consideration of using MAC CE to dynamically control semi-persistent (SP) SRSp resource sets, it is obvious that Method 2 can also be applied to using MAC CE to dynamically control periodic SRSp resources and / or aperiodic (AP) SRSp resources / resource sets, provided that the spirit of this disclosure is maintained.

[0309] Figure 17 This is a diagram illustrating the method by which the UE sends SRS for positioning.

[0310] The following will be based on the above. Figures 13 to 16 Describes the method by which the UE sends SRS for positioning.

[0311] Reference Figure 17 The UE can receive configuration information, including SRS frequency hopping configuration, from the BS via higher-layer signaling (S171). The SRS frequency hopping configuration may include information about the number of hops, the number of symbols within a hop, the BW of the hop, and the number of overlapping resource blocks between hops. Alternatively, the configuration information may include at least one SRS frequency hopping configuration. For example, as described later, the configuration information may include different SRS frequency hopping configurations for each SRS resource set ID. In this document, the UE may be a RedCap UE with a maximum transmission BW size limited to 20MHz (or 5MHz). In this case, the UE may receive / configure SRS frequency hopping configurations related to SRS transmission to improve the accuracy of SRS-based positioning.

[0312] Alternatively, the UE can also receive SRS resource configuration information for multiple SRS resource sets used for positioning via higher-layer signaling. For example, the SRS resource configuration information may include information about multiple SRS resource set IDs assigned to the multiple SRS resource sets and information about the frequency / time resources corresponding to each ID. As mentioned above, the higher-layer signaling may be RRC signaling.

[0313] Subsequently, the UE may receive first control information (S173) to enable one of multiple SRS resource sets based on the SRS resource set ID. As described above, the first control information may include information about one of the multiple SRS resource set IDs assigned to the multiple SRS resource sets via SRS resource configuration information. For example, the first control information may be signaled to the UE via a MAC CE for enabling the SRS resource set, and the UE may enable one of the multiple SRS resource sets based on the SRS resource set ID included in the ID field of the MAC CE. The first control information and the second control information (described later) may be received via the MAC CE.

[0314] Subsequently, the UE can determine whether to enable SRS frequency hopping configuration (S175). Specifically, the UE can determine whether to enable SRS frequency hopping configuration based on first control information that enables an SRS resource set. For example, some of the multiple SRS resource set IDs can be pre-assigned as IDs that support frequency hopping, and the remaining SRS resource set IDs can be pre-assigned as IDs that do not support frequency hopping. This information regarding whether each SRS resource set ID supports frequency hopping can be provided as SRS resource configuration information or through separate RRC signaling. In this case, if the SRS resource set ID of one SRS resource set included in the first control information is assigned as an ID that supports frequency hopping, the UE can enable SRS frequency hopping configuration. Alternatively, if the SRS resource set ID of one SRS resource set included in the first control information is assigned as an ID that does not support frequency hopping, the already enabled SRS frequency hopping configuration can be disabled, or the SRS frequency hopping configuration can be disabled.

[0315] Alternatively, when an SRS resource set ID is a frequency-hopping supported ID, the UE may enable the SRS frequency hopping configuration corresponding to the SRS resource set ID from at least one SRS frequency hopping configuration included in the configuration information. As described above, the configuration information may include different SRS frequency hopping configurations (or frequency hopping patterns) for various SRS resource set IDs that support frequency hopping. In this case, the UE may enable the SRS frequency hopping configuration corresponding to the SRS resource set ID included in the first control information from at least one SRS frequency hopping configuration. Alternatively, after enabling the SRS frequency hopping configuration upon receiving the first control information, the UE may deactivate the enabled SRS frequency hopping configuration upon receiving second control information including another SRS resource set ID that does not support frequency hopping. Alternatively, after enabling the SRS frequency hopping configuration upon receiving the first control information, the UE may change the enabled SRS frequency hopping configuration to the SRS frequency hopping configuration corresponding to the other SRS resource set ID upon receiving third control information including another SRS resource set ID that supports frequency hopping.

[0316] Subsequently, the UE may transmit SRS for positioning within an enabled SRS resource set (S177). As described above, when an SRS frequency hopping configuration is enabled / applied for the aforementioned SRS resource set, the UE may perform frequency hopping on the SRS based on the SRS frequency hopping configuration and transmit it in each of the multiple hops. When at least one of the multiple hops is outside the SRS transmission BW (the aforementioned SRSp BW), the UE may discard or reassign the at least one hop based on at least one of the aforementioned methods for discarding / reassigning the at least one hop.

[0317] Figure 18 This is a diagram illustrating the method by which a BS receives SRS for positioning.

[0318] The following will be based on the above. Figures 13 to 17 This describes a method for the BS to receive SRS for positioning.

[0319] Reference Figure 18 The BS can send configuration information, including SRS frequency hopping configuration, to the UE via higher-layer signaling (S181). The SRS frequency hopping configuration may include information about the number of hops, the number of symbols within a hop, the BW of the hop, and the number of overlapping resource blocks between hops. Alternatively, the configuration information may include at least one SRS frequency hopping configuration. For example, as described later, the configuration information may include different SRS frequency hopping configurations for each SRS resource set ID.

[0320] Alternatively, the BS can also send SRS resource configuration information for multiple SRS resource sets used for positioning to the UE via higher-layer signaling. For example, the SRS resource configuration information may include information about multiple SRS resource set IDs assigned to the multiple SRS resource sets and information about the frequency / time resources corresponding to each ID. As mentioned above, the higher-layer signaling may be RRC signaling.

[0321] Subsequently, the BS can send first control information (S183) to the UE to enable one of the multiple SRS resource sets based on the SRS resource set ID. As described above, the first control information may include information about one of the multiple SRS resource set IDs assigned to the multiple SRS resource sets through SRS resource configuration information. For example, the first control information can be signaled to the UE via a MAC CE for enabling the SRS resource set, and the BS can enable one of the multiple SRS resource sets based on the SRS resource set ID included in the ID field of the MAC CE. The first control information can be received via the MAC CE.

[0322] Subsequently, the BS can receive SRS for positioning from the UE in an enabled SRS resource set (S185). As described above, the BS can determine whether to apply SRS frequency hopping configuration to the SRS transmission based on whether the SRS resource set ID of an SRS resource set included in the first control information supports frequency hopping. For example, when the SRS resource set ID of an SRS resource set included in the first control information is a frequency hopping-supporting ID, the BS can expect to receive SRS with SRS frequency hopping configuration applied. In this case, the BS can combine the SRS received in multiple hops to calculate positioning-related measurements and report the calculated measurements to the LMF, or it can calculate / estimate the UE's location based on the calculated measurements.

[0323] Therefore, the proposed disclosure can dynamically indicate whether frequency hopping is supported using a conventional MAC CE that dynamically indicates the enabling of an SRS resource set via an SRS resource set ID, without defining a new MAC CE to indicate the enabling of an SRSp frequency hopping configuration. This can be used to minimize the increase in signaling load for MAC CEs that dynamically indicate whether an SRSp frequency hopping configuration is enabled.

[0324] Furthermore, the proposed disclosure allows for easy deactivation or modification of the SRS frequency hopping configuration by simply changing the SRS resource set ID included in the MAC CE that enables the SRS resource set.

[0325] Example of a communication system using this disclosure

[0326] Although not limited thereto, the various descriptions, functions, processes, proposals, methods and / or operation flowcharts disclosed in this document can be applied to various fields requiring wireless communication / connectivity (5G) between devices.

[0327] In the following description, it will be illustrated in more detail with reference to the accompanying drawings. In the following drawings / description, unless otherwise specified, the same reference numerals may refer to the same or corresponding hardware blocks, software blocks, or functional blocks.

[0328] Figure 19 A communication system applied to this disclosure is shown.

[0329] Reference Figure 19The communication system 1 applied to this disclosure includes wireless devices, base stations (BS), and networks. Herein, a wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G New RAT (NR) or Long Term Evolution (LTE)) and may be referred to as a communication / radio / 5G device. Wireless devices may include (but are not limited to) robots 100a, vehicles 100b-1 and 100b-2, extended reality (XR) devices 100c, handheld devices 100d, home appliances 100e, Internet of Things (IoT) devices 100f, and artificial intelligence (AI) devices / servers 400. For example, vehicles may include vehicles with wireless communication capabilities, autonomous vehicles, and vehicles capable of performing communication between vehicles. Herein, vehicles may include unmanned aerial vehicles (UAVs) (e.g., drones). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices, and may take the form of head-mounted displays (HMDs), head-up displays (HUDs) installed in vehicles, televisions, smartphones, computers, wearable devices, home appliances, digital signage, vehicles, robots, etc. Handheld devices may include smartphones, smart tablets, wearable devices (e.g., smartwatches or smart glasses) and computers (e.g., laptops). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors and smart meters. For example, the BS and network may be implemented as wireless devices, and a particular wireless device 200a may operate as a BS / network node relative to other wireless devices.

[0330] Wireless devices 100a to 100f can connect to network 300 via BS 200. AI technology can be applied to wireless devices 100a to 100f, and wireless devices 100a to 100f can connect to AI server 400 via network 300. Network 300 can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although wireless devices 100a to 100f can communicate with each other via BS 200 / network 300, wireless devices 100a to 100f can perform direct communication with each other (e.g., sidelink communication) without going through the BS / network. For example, vehicles 100b-1 and 100b-2 can perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0331] Wireless communication / connections 150a, 150b, or 150c can be established between wireless devices 100a to 100f / BS 200 or between BS 200 and BS 200. In this document, wireless communication / connections can be established via various RATs (e.g., 5G NR) such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication), or inter-BS communication (e.g., relay, integrated access backhaul (IAB)). Wireless devices and BS / wireless devices can transmit / receive radio signals to / from each other via wireless communication / connections 150a and 150b. For example, wireless communication / connections 150a and 150b can transmit / receive signals via various physical channels. For this purpose, at least a portion of the configuration information for configuring the process of transmitting / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes can be performed based on various proposals of this disclosure.

[0332] Examples of wireless devices using this disclosure

[0333] Figure 20 A wireless device applicable to this disclosure is shown.

[0334] Reference Figure 20 The first wireless device 100 and the second wireless device 200 can transmit radio signals via various RATs (e.g., LTE and NR). In this document, {first wireless device 100 and second wireless device 200} can correspond to... Figure 19 {Wireless Device 100x and BS 200} and / or {Wireless Device 100x and Wireless Device 100x}.

[0335] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and additionally include one or more transceivers 106 and / or one or more antennas 108. The processors 102 may control the memories 104 and / or the transceivers 106, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. For example, the processor 102 may process information in the memory 104 to generate a first information / signal, and then transmit a radio signal including the first information / signal via the transceivers 106. The processor 102 may receive a radio signal including a second information / signal via the transceivers 106, and then store the information obtained by processing the second information / signal in the memory 104. The memory 104 may be connected to the processor 102 and may store various information relating to the operation of the processor 102. For example, the memory 104 may store software code including commands for performing some or all of the processes controlled by the processor 102 or for performing the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. In this document, processor 102 and memory 104 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). Transceiver 106 may be connected to processor 102 and transmit and / or receive radio signals via one or more antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. Transceiver 106 may be used interchangeably with radio frequency (RF) units. In this disclosure, a wireless device may refer to a communication modem / circuit / chip.

[0336] Specifically, the first wireless device or network 100 may include a processor 102 and a memory 104 connected to the transceiver 106. The memory 104 may include at least one program executable with reference to... Figures 13 to 18 The operations related to the described implementation method.

[0337] The processor 102 can control the transceiver 106 to receive configuration information, including SRS frequency hopping configuration, via higher-layer signaling, receive first control information enabling one of multiple SRS resource sets, and transmit SRS for positioning within the one SRS resource set. Whether to enable SRS frequency hopping configuration can be determined based on the first control information enabling the one SRS resource set.

[0338] Alternatively, a processing apparatus may be configured including a processor 102 and a memory 104 for controlling a UE to transmit SRS for positioning. In this case, the processing apparatus may include at least one processor and at least one memory connected to the at least one processor and storing instructions, which, when executed by the at least one processor, cause the UE to receive configuration information including SRS frequency hopping configuration via higher-layer signaling, receive first control information enabling one of a plurality of SRS resource sets, and transmit SRS for positioning within the one SRS resource set. Whether to enable SRS frequency hopping configuration may be determined based on the first control information enabling the one SRS resource set.

[0339] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and additionally include one or more transceivers 206 and / or one or more antennas 208. The processors 202 may control the memories 204 and / or the transceivers 206, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. For example, the processors 202 may process information in the memories 204 to generate a third information / signal, and then transmit a radio signal including the third information / signal via the transceivers 206. The processors 202 may receive a radio signal including a fourth information / signal via the transceivers 206, and then store the information obtained by processing the fourth information / signal in the memories 204. The memories 204 may be connected to the processors 202 and may store various information relating to the operation of the processors 202. For example, the memories 204 may store software code including commands for performing some or all of the processes controlled by the processors 202 or for performing the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. In this document, processor 202 and memory 204 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). Transceiver 206 may be connected to processor 202 and transmit and / or receive radio signals via one or more antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. Transceiver 206 may be used interchangeably with an RF unit. In this disclosure, a wireless device may refer to a communication modem / circuit / chip.

[0340] Specifically, the second wireless device or UE 200 may include a processor 202 and a memory 204 connected to the transceiver or transceiver 206. The memory 204 may include at least one program executable with reference to... Figures 13 to 18 The operations related to the described implementation method.

[0341] The processor 202 can control the RF transceiver 206 to send configuration information, including SRS frequency hopping configuration, to the UE via higher-layer signaling, send first control information to the UE to enable one of the multiple SRS resource sets, and receive SRS for positioning within the one SRS resource set. Whether to enable SRS frequency hopping configuration can be determined based on the first control information enabling the one SRS resource set.

[0342] The hardware elements of wireless devices 100 and 200 will be described in more detail below. One or more protocol layers may be implemented by (but are not limited to) one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). One or more processors 102 and 202 may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) according to the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors 102 and 202 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information, according to the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document, and provide the generated signals to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive signals (e.g., baseband signals) and acquire PDUs, SDUs, messages, control information, data, or information from one or more transceivers 106 and 206, according to the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document.

[0343] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. As an example, one or more application-specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field-programmable gate arrays (FPGAs) may be included in one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204 to be driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document can be implemented using firmware or software in the form of code, commands, and / or command sets.

[0344] One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, code, instructions, and / or commands. One or more memories 104 and 204 may be configured with read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard disk drive, registers, cache memory, computer-readable storage media, and / or combinations thereof. One or more memories 104 and 204 may be located internally and / or externally to one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 via various technologies such as wired or wireless connections.

[0345] One or more transceivers 106 and 206 may transmit user data, control information, and / or radio signals / channels mentioned in the methods and / or operation flowcharts of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and transmit and receive radio signals. For example, one or more processors 102 and 202 may perform controls to enable one or more transceivers 106 and 206 to transmit user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may perform controls to enable one or more transceivers 106 and 206 to receive user data, control information, or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to transmit and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document via one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received radio signals / channels, etc., from RF band signals to baseband signals for processing by 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 by one or more processors 102 and 202 from baseband signals to RF band signals. For this purpose, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0346] Examples of wireless devices using this disclosure

[0347] Figure 21 Another example of a wireless device applied to this disclosure is shown. The wireless device may vary depending on usage / service (see reference). Figure 19 It can be realized in various forms.

[0348] Reference Figure 21 Wireless devices 100 and 200 can correspond to Figure 20The wireless devices 100 and 200 are configured with various elements, components, units / parts, and / or modules. For example, each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and an additional component 140. The communication unit may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include... Figure 20 One or more processors 102 and 202 and / or one or more memories 104 and 204. For example, transceiver 114 may include Figure 20 The device comprises one or more transceivers 106 and 206 and / or one or more antennas 108 and 208. Control unit 120 is electrically connected to communication unit 110, memory 130, and add-on components 140, and controls the overall operation of the wireless device. For example, control unit 120 may control the electrical / mechanical operation of the wireless device based on programs / code / commands / information stored in memory unit 130. Control unit 120 may transmit information stored in memory unit 130 to an external source (e.g., other communication devices) via communication unit 110 through a wireless / wired interface, or store information received from an external source (e.g., other communication devices) via communication unit 110 in memory unit 130 via a wireless / wired interface.

[0349] The additional component 140 can be configured differently depending on the type of wireless device. For example, the additional component 140 may include at least one of a power supply unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device may be configured according to (but is not limited to) a robot. Figure 19 100a), vehicles ( Figure 19 100b-1 and 100b-2), XR device ( Figure 19 100c), handheld device ( Figure 19 100d), home appliances ( Figure 19 100e), IoT devices ( Figure 19 100f), digital broadcasting terminals, holographic devices, public safety devices, MTC devices, medical devices, fintech devices (or financial devices), security devices, climate / environmental devices, AI servers / devices ( Figure 19 400), BS ( Figure 19 This can be achieved through 200 network nodes, etc. Wireless devices can be used in mobile or fixed locations depending on the use case / service.

[0350] exist Figure 21In wireless devices 100 and 200, all elements, components, units / parts, and / or modules may be interconnected via wired interfaces, or at least a portion thereof may be wirelessly connected via communication unit 110. For example, in each of wireless devices 100 and 200, control unit 120 and communication unit 110 may be wired connected, and control unit 120 and first units (e.g., 130 and 140) may be wirelessly connected via communication unit 110. The various elements, components, units / parts, and / or modules within wireless devices 100 and 200 may also include one or more elements. For example, control unit 120 may be configured as a collection of one or more processors. As an example, control unit 120 may be configured as a collection of communication control processors, application processors, electronic control units (ECUs), graphics processing units, and memory control processors. As another example, memory 130 may be configured as random access memory (RAM), dynamic RAM (DRAM), read-only memory (ROM), flash memory, volatile memory, non-volatile memory, and / or combinations thereof.

[0351] Examples of vehicles or autonomous vehicles using this disclosure

[0352] Figure 22 The illustration shows a vehicle or autonomous vehicle applicable to this disclosure. The vehicle or autonomous vehicle may be a mobile robot, car, train, manned / unmanned aerial vehicle (AV), vessel, etc.

[0353] Reference Figure 22 The vehicle or autonomous 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 part of the communication unit 110. Blocks 110 / 130 / 140a to 140d respectively correspond to... Figure 21 Blocks 110 / 130 / 140.

[0354] Communication unit 110 can 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. Control unit 120 can perform various operations by controlling the components of the vehicle or autonomous vehicle 100. Control unit 120 may include electronic control unit (ECU). Additionally, drive unit 140a enables the vehicle or autonomous vehicle 100 to move on a road. Drive unit 140a may include an engine, motor, powertrain, wheels, brakes, steering mechanism, etc. Power supply unit 140b supplies power to the vehicle or autonomous vehicle 100 and includes wired / wireless charging circuitry, battery, etc. Sensor unit 140c can acquire vehicle status, surrounding environment information, user information, etc. Sensor unit 140c may include inertial measurement unit (IMU) sensors, collision sensors, wheel sensors, speed sensors, slope sensors, weight sensors, heading sensors, position modules, vehicle forward / reverse sensors, battery sensors, fuel sensors, tire sensors, steering sensors, temperature sensors, depth sensors, ultrasonic sensors, lighting sensors, pedal position sensors, etc. Autonomous driving unit 140d can implement technologies for maintaining the vehicle within its lane, technologies for automatically adjusting speed (e.g., adaptive cruise control), technologies for autonomously driving along a determined path, and technologies for automatically setting a route if a destination is set, etc.

[0355] For example, communication unit 110 can receive map data, traffic information data, etc., from an external server. Autonomous driving unit 140d can generate an autonomous driving path and driving plan from the acquired data. Control unit 120 can control drive unit 140a, enabling the vehicle or autonomous vehicle 100 to move along the autonomous driving path according to the driving plan (e.g., speed / direction control). During autonomous driving, communication unit 110 can periodically or non-periodically acquire recent traffic information data from an external server and acquire surrounding traffic information data from neighboring vehicles. During autonomous driving, sensor unit 140c can acquire vehicle status and / or surrounding environment information. Autonomous driving unit 140d can update the autonomous driving path and driving plan based on newly acquired data / information. Communication unit 110 can transmit information about vehicle location, autonomous driving path, and / or driving plan to an external server. The external server can predict traffic information data using AI technology, etc., based on information collected from the vehicle or autonomous vehicle, and provide the predicted traffic information data to the vehicle or autonomous vehicle.

[0356] Here, in addition to narrowband IoT for low-power communication, the wireless communication technologies implemented in the wireless devices (XXX, YYY) of this specification may also include LTE, NR, and 6G. In this case, for example, NB-IoT technology may be an example of low-power wide-area network (LPWAN) technology and may be implemented according to standards such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the aforementioned names. Alternatively or additionally, the wireless communication technology implemented in the wireless devices (XXX, YYY) of this specification may perform communication based on LTE-M technology. In this case, as an example, LTE-M technology may be an example of LPWAN technology and may be referred to by various names such as eMTC (enhanced machine-type communication). For example, LTE-M technology may be implemented according to at least one of various standards such as 1) LTE Cat 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-bandwidth limited), 5) LTE-MTC, 6) LTE machine-type communication, and / or 7) LTE M, and is not limited to the aforementioned names. Alternatively or additionally, considering low-power communication, the wireless communication technology implemented in the wireless devices (XXX, YYY) of this specification is at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN), and is not limited to the aforementioned names. As an example, ZigBee technology can be used to generate personal area networks (PANs) related to low / low power digital communication based on various standards such as IEEE 802.15.4, and can be referred to by various names.

[0357] The above embodiments are combinations of the components and features of this disclosure in a predetermined form. Unless explicitly stated otherwise, each component or feature should be considered optional. Each component or feature may be implemented without combination with other components or features. Some components and / or features may also be combined to constitute embodiments of this disclosure. The order of operations described in the embodiments of this disclosure may be changed. Some configurations or features of one embodiment may be included in another embodiment, or may be replaced by corresponding configurations or features of another embodiment. It is obvious that claims not explicitly referenced in the claims may be combined to constitute embodiments, or may be included as new claims after submission through amendment.

[0358] In this document, the embodiments of this disclosure are primarily described in terms of the signal transmission and reception relationship between the UE and the BS. The transmission and reception relationship can be extended in the same or similar manner to the signal transmission and reception between the UE and a repeater or between the BS and a repeater. Specific operations described herein as being performed by the BS can, in some cases, be performed by upper-layer nodes. That is, in a network consisting of multiple network nodes including the BS, various operations performed for communication with the UE can be performed by the BS or by other network nodes different from the BS. The term "base station" can be replaced by terms such as fixed station, Node B, eNode B (eNB), or access point. Similarly, the term "terminal" can be replaced by terms such as user equipment (UE), mobile station (MS), or mobile subscriber station (MSS).

[0359] Embodiments of this disclosure can be implemented by various means, such as hardware, firmware, software, or a combination thereof. In the case of hardware implementation, embodiments of this disclosure can be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), processors, controllers, microcontrollers, or microprocessors.

[0360] When implemented via firmware or software, embodiments of this disclosure can be implemented in the form of modules, processes, functions, etc., that perform the above-described functions or operations. Software code can be stored in memory units and driven by a processor. Memory units can be located inside or outside the processor and can exchange data with the processor through various known means.

[0361] It will be apparent to those skilled in the art that this disclosure may be embodied in other specific forms without departing from its characteristics. Therefore, the detailed description above should not be construed as restrictive in all respects, but rather as illustrative. The scope of this disclosure should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of this disclosure are included within its scope.

[0362] Industrial applicability

[0363] This disclosure can be used in other devices in a UE, BS, or wireless mobile communication system.

Claims

1. A method for a user equipment (UE) to transmit a sounding reference signal (SRS) for positioning in a wireless communication system, the method comprising the following steps: Receive configuration information, including SRS frequency hopping configuration, via higher-level signaling; Receive first control information for enabling one of the SRS resource sets in multiple SRS resource sets; as well as The SRS for positioning is transmitted in one of the SRS resource sets. Specifically, the SRS frequency hopping configuration is determined based on the first control information that enables the SRS resource set.

2. The method according to claim 1, wherein, Based on the fact that the SRS resource set identifier ID of the SRS resource set included in the first control information is an ID that supports SRS frequency hopping, the SRS frequency hopping configuration is enabled.

3. The method according to claim 2, wherein, The SRS used for positioning is transmitted based on the SRS frequency hopping configuration corresponding to the SRS resource set ID.

4. The method according to claim 1, wherein, If the SRS resource set ID included in the first control information is an ID that does not support SRS frequency hopping, then the SRS frequency hopping configuration is not enabled.

5. The method according to claim 1, further comprising the following steps: Receive second control information to enable another SRS resource set ID that does not support SRS frequency hopping. Based on the receipt of the second control information, the SRS frequency hopping configuration changes from the enabled state to the disabled state.

6. The method according to claim 1, wherein, The configuration information includes different SRS frequency hopping configurations for each SRS resource set ID that supports frequency hopping.

7. The method according to claim 1, wherein, The SRS frequency hopping configuration includes information about the number of hops, the number of symbols in each hop, the bandwidth of each hop, and the number of overlapping resource blocks between hops.

8. The method according to claim 1, wherein, The first control information is received by the Media Access Control (MAC) control element CE.

9. The method according to claim 1, wherein, The UE is a RedCap UE with reduced capability, where the maximum transmission bandwidth is limited to 20MHz.

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

11. A user equipment (UE) that transmits a sounding reference signal (SRS) for positioning in a wireless communication system, the UE comprising: RF transceiver; as well as The processor is connected to the RF transceiver. The processor controls the RF transceiver to receive configuration information, including SRS frequency hopping configuration, via higher-layer signaling; receives first control information to enable one of multiple SRS resource sets; and transmits the SRS for positioning within the specified SRS resource set. Specifically, the SRS frequency hopping configuration is determined based on the first control information that enables the SRS resource set.

12. The UE according to claim 11, wherein, Based on the fact that the SRS resource set identifier ID of the SRS resource set included in the first control information is an ID that supports SRS frequency hopping, the SRS frequency hopping configuration is enabled.

13. A processing apparatus for controlling a user equipment (UE) to transmit a sounding reference signal (SRS) for positioning in a wireless communication system, the processing apparatus comprising: At least one processor; as well as At least one memory, connected to the at least one processor and storing instructions, which, when executed by the at least one processor, cause the UE to receive configuration information including SRS frequency hopping configuration via higher-layer signaling, receive first control information enabling one of multiple SRS resource sets, and transmit the SRS for positioning within the one SRS resource set. Specifically, the SRS frequency hopping configuration is determined based on the first control information that enables the SRS resource set.

14. A method for receiving a sounding reference signal (SRS) for positioning by a base station (BS) in a wireless communication system, the method comprising the following steps: Configuration information, including SRS frequency hopping configuration, is sent to the user equipment (UE) via higher-layer signaling. Send the UE first control information to enable one of the multiple SRS resource sets; as well as The SRS for positioning is received in the SRS resource set. Specifically, the SRS frequency hopping configuration is determined based on the first control information that enables the SRS resource set.

15. A base station (BS) for receiving a detection reference signal (SRS) for positioning in a wireless communication system, the BS comprising: RF transceiver; as well as The processor is connected to the RF transceiver. The processor controls the RF transceiver to send configuration information, including SRS frequency hopping configuration, to the user equipment (UE) via higher-layer signaling, sends first control information to the UE to enable one of the multiple SRS resource sets, and receives the SRS for positioning within the specified SRS resource set. Specifically, the SRS frequency hopping configuration is determined based on the first control information that enables the SRS resource set.

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