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

Abstract

According to at least one of embodiments disclosed in the present specification, a method for transmitting a sounding reference signal (SRS) by a user equipment (UE) in a wireless communication system includes: receiving configuration information for linking a plurality of SRS resource sets on a plurality of component carriers (CCs) to each other for SRS bandwidth aggregation; receiving downlink control information (DCI) that triggers an aperiodic SRS transmission on the first set of SRS resources; and performing an aperiodic SRS transmission. Based on the fact that a first SRS resource set on which aperiodic SRS transmission is triggered is one SRS resource set in a plurality of SRS resource sets linked through configuration information, aperiodic SRS transmission can be performed on all CCs in a plurality of CCs in which the plurality of SRS resource sets are configured.

Description

Technical Field

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

[0002] Generally, wireless communication systems are developing to provide communication services such as audio and data communication services, with diverse coverage over a wide range. Wireless communication is a multiple-access system capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). For example, a multiple-access system may be any of a code division multiple access (CDMA) system, a frequency division multiple access (FDMA) system, a time division multiple access (TDMA) system, an orthogonal frequency division multiple access (OFDMA) system, and a single-carrier frequency division multiple access (SC-FDMA) system. Summary of the Invention

[0003] Technical issues

[0004] An object of the present invention is to provide a method and apparatus for transmitting or receiving signals more accurately and efficiently in a wireless communication system.

[0005] The purpose of the present disclosure is not limited thereto, and other purposes can be inferred from the disclosed embodiments.

[0006] Technical Solution

[0007] In one aspect of the present disclosure, a method for transmitting a sounding reference signal (SRS) by a user equipment (UE) in a wireless communication system is provided. The method includes: receiving configuration information for linking multiple SRS resource sets on multiple component carriers (CCs) to each other for SRS bandwidth aggregation; receiving downlink control information (DCI) triggering aperiodic SRS transmission on a first SRS resource set; and performing aperiodic SRS transmission. Based on the first SRS resource set on which the aperiodic SRS transmission is triggered being one of the multiple SRS resource sets linked by the configuration information, aperiodic SRS transmission may be performed on all CCs in the multiple CCs in which the multiple SRS resource sets are configured.

[0008] Based on the first SRS resource set being configured in a first CC among multiple CCs and the second SRS resource set linked to the first SRS resource set being configured in a second CC among multiple CCs, non-periodic SRS transmission can be performed by SRS bandwidth aggregation on the first SRS resource set on the first CC and the second SRS resource set on the second CC.

[0009] The UE may maintain phase continuity of aperiodic SRS transmissions performed on a plurality of SRS resource sets linked for SRS bandwidth aggregation.

[0010] Linking multiple SRS resource sets for SRS bandwidth aggregation may be related to the positioning of the UE.

[0011] Configuration information for linking a plurality of SRS resource sets may be received through radio resource control (RRC) signaling.

[0012] The multiple SRS resource sets linked for SRS bandwidth aggregation have the same comb type, the same SRS symbol length, and the same SRS symbol position.

[0013] The UE may not assume that SRS resource sets configured to be different in at least one of comb type, SRS symbol length, or SRS symbol position are linked to each other for SRS bandwidth aggregation.

[0014] The same power parameter may be configured for multiple SRS resource sets linked for SRS bandwidth aggregation.

[0015] In another aspect of the present disclosure, a processor-readable recording medium is provided, on which a program for executing the above-mentioned SRS transmission method is recorded.

[0016] In another aspect of the present disclosure, a device for wireless communication is provided herein. The device may include: a memory configured to store instructions; and a processor configured to perform operations by executing the instructions. The operations of the processor may include: receiving configuration information for linking multiple SRS resource sets on multiple CCs for SRS bandwidth aggregation; receiving DCI that triggers aperiodic SRS transmission on a first SRS resource set; and performing aperiodic SRS transmission. Based on the fact that the first SRS resource set on which the aperiodic SRS transmission is triggered is one of the multiple SRS resource sets linked by the configuration information, aperiodic SRS transmission may be performed on all CCs in the multiple CCs in which the multiple SRS resource sets are configured.

[0017] The device may also include a transceiver.

[0018] The device may be a UE operating in a wireless communication system.

[0019] The device may be a processing device configured to control a UE operating in a wireless communication system.

[0020] In another aspect of the present disclosure, a method for receiving an SRS by a base station (BS) in a wireless communication system is provided. The method includes: transmitting configuration information to a UE for linking multiple SRS resource sets across multiple CCs for SRS bandwidth aggregation; transmitting DCI to the UE for triggering aperiodic SRS transmission on a first SRS resource set; and receiving an aperiodic SRS from the UE. Based on the fact that the first SRS resource set for triggering aperiodic SRS transmission is one of the multiple SRS resource sets linked by the configuration information, the aperiodic SRS can be received on all CCs in the multiple CCs in which the multiple SRS resource sets are configured.

[0021] In another aspect of the present disclosure, a processor-readable recording medium is provided, on which a program for executing the above-mentioned SRS reception method is recorded.

[0022] In another aspect of the present disclosure, a base station (BS) for wireless communication is provided. The BS includes: a memory configured to store instructions; and a processor configured to perform operations by executing the instructions. The operations of the processor may include: sending configuration information for linking multiple SRS resource sets on multiple CCs for SRS bandwidth aggregation to a UE; sending a DCI to the UE that triggers aperiodic SRS transmission on a first SRS resource set; and receiving an aperiodic SRS from the UE. Based on the fact that the first SRS resource set on which the aperiodic SRS transmission is triggered is one of the multiple SRS resource sets linked by the configuration information, the aperiodic SRS can be received on all CCs in the multiple CCs in which the multiple SRS resource sets are configured.

[0023] Beneficial effects

[0024] According to the embodiments of the present disclosure, signals can be transmitted or received more accurately and efficiently in a wireless communication system.

[0025] The effects of the present disclosure are not limited thereto, and other advantageous effects can be inferred from the disclosed embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 illustrates physical channels used in a 3rd Generation Partnership Project (3GPP) system as an exemplary wireless communication system and a general signal transmission method using the physical channels;

[0027] Figure 2 Figure 1 shows the radio frame structure;

[0028] Figure 3 A resource grid illustrating time slots is shown;

[0029] Figure 4 illustrates an exemplary mapping of physical channels in time slots;

[0030] Figure 5 An exemplary physical downlink shared channel (PDSCH) reception and acknowledgement / negative acknowledgement (ACK / NACK) transmission process is illustrated.

[0031] Figure 6 An exemplary physical uplink shared channel (PUSCH) transmission process is illustrated.

[0032] Figure 7 Figure 1 shows an example of setting up a positioning protocol.

[0033] Figure 8 An example of OTDOA is shown.

[0034] Figure 9 An example of multiple RTT is shown.

[0035] Figure 10 A process for operating a network node (eg, an upper node of a user equipment (UE), a location management function (LMF), etc.) according to an embodiment is illustrated.

[0036] Figure 11 FIGURE 1 illustrates the UE operation process for performing positioning measurements.

[0037] Figure 12 Illustration of various integrated sensing and communication (ISAC) environments.

[0038] Figure 13 is a diagram for explaining sounding reference signal (SRS) bandwidth aggregation according to an embodiment.

[0039] Figure 14 is a diagram for explaining semi-persistent SRS transmission in a wireless communication system according to an embodiment.

[0040] Figure 15 is a diagram for explaining aperiodic SRS transmission in a wireless communication system according to an embodiment.

[0041] Figure 16 A flowchart illustrating a method in which a UE transmits an SRS according to an embodiment is shown.

[0042] Figure 17 A flowchart illustrating a method in which a BS receives an SRS according to an embodiment is shown.

[0043] Figures 18 to 21 The diagram illustrates an example of a communication system 1 and a wireless device applicable to the present disclosure. DETAILED DESCRIPTION

[0044] Embodiments of the present disclosure are applicable to various wireless access technologies, such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), and single-carrier frequency division multiple access (SC-FDMA). CDMA can be implemented as a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented as a radio technology such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA can be implemented as a radio technology such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wireless Fidelity (Wi-Fi)), IEEE 802.16 (Worldwide Interoperability for Microwave Access (WiMAX)), IEEE 802.20, and Evolved UTRA (E-UTRA). UTRA is part of the Universal Mobile Telecommunications System (UMTS). 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of Evolved UMTS (E-UMTS) using E-UTRA. 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.

[0045] As more and more communication devices demand greater communication capacity, there is a need for enhanced mobile broadband communications compared to traditional radio access technologies (RATs). Furthermore, massive machine-type communications (MTC), which can connect multiple devices and objects to provide a variety of services anytime and anywhere, is another key consideration for next-generation communications. Discussions are also underway to design communication systems that take into account reliability- and latency-sensitive services and users. Consequently, discussions are underway to introduce new radio access technologies that take into account enhanced mobile broadband communications (eMBB), massive MTC, and ultra-reliable low-latency communications (URLLC). In this disclosure, for simplicity, this technology will be referred to as NR (New Radio or New RAT).

[0046] For the sake of brevity, 3GPP NR is mainly described, but the technical concept of the present disclosure is not limited thereto.

[0047] For background information, definitions of terms, and abbreviations related to the present disclosure, the following documents may be incorporated by reference.

[0048] - 38.211: Physical channels and modulation

[0049] - 38.212: Multiplexing and Channel Coding

[0050] - 38.213: Physical layer procedures for control

[0051] - 38.214: Physical layer procedures for data

[0052] - 38.215: Physical layer measurements

[0053] - 38.300: NR and NG-RAN general description

[0054] - 38.304: User Equipment (UE) procedures in idle mode and in RRC inactive state

[0055] - 38.321 Media Access Control (MAC) Protocol Specification

[0056] - 38.331: Radio Resource Control (RRC) Protocol Specification

[0057] - 37.213: Introduction of channel access procedures for unlicensed spectrum for NR-based access

[0058] - 36.355: LTE Positioning Protocol

[0059] - 37.355: LTE Positioning Protocol

[0060] Terms and abbreviations

[0061] - 5GC: 5G core network

[0062] - 5GS: 5G system

[0063] - AoA: Angle of Arrival

[0064] - AP: Access Point

[0065] - CID: Cell ID

[0066] - E-CID: Enhanced Cell ID

[0067] - GNSS: Global Navigation Satellite System

[0068] - GPS: Global Positioning System

[0069] - LCS: Location Services

[0070] - LMF: Location Management Function

[0071] - LPP: LTE Positioning Protocol

[0072] - MO-LR: Mobile Originated Location Request

[0073] - MT-LR: Mobile Terminated Location Request

[0074] - NRPPa: NR Positioning Protocol A

[0075] - OTDOA: Observed Time Difference of Arrival

[0076] - PDU: Protocol Data Unit

[0077] - PRS: Positioning Reference Signal

[0078] - RRM: Radio Resource Management

[0079] - RSSI: Received Signal Strength Indicator

[0080] - RSTD: Reference Signal Time Difference

[0081] - ToA: Time of Arrival

[0082] - TP: Transmission Point

[0083] - TRP: Transmit and Receive Point

[0084] - UE: User Equipment

[0085] - SS: Search Space

[0086] - CSS: Common Search Space

[0087] - USS: UE-specific search space

[0088] - PDCCH: Physical Downlink Control Channel

[0089] - PDSCH: Physical Downlink Shared Channel;

[0090] - PUCCH: Physical Uplink Control Channel;

[0091] - PUSCH: Physical Uplink Shared Channel;

[0092] - DCI: Downlink Control Information

[0093] - UCI: Uplink Control Information

[0094] - SI: System Information

[0095] - SIB: System Information Block

[0096] - MIB: Master Information Block

[0097] - RRC: Radio Resource Control

[0098] - DRX: Discontinuous Reception

[0099] - RNTI: Radio Network Temporary Identifier

[0100] - CSI: Channel State Information

[0101] - PCell: Primary cell

[0102] - SCell: Secondary cell

[0103] - PSCell: Primary SCG (Secondary Cell Group) cell

[0104] - CA: Carrier Aggregation

[0105] - WUS: Wake-up signal

[0106] - TX: Transmitter

[0107] - RX: Receiver

[0108] - RSTD: Reference Signal Time Difference

[0109] - RS: Reference Signal

[0110] - PRS: Positioning Reference Signal

[0111] - SRS: Sounding Reference Signal

[0112] 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 the UE includes data and various control information, and various physical channels are used depending on the type and purpose of the information transmitted and received by the UE and the BS.

[0113] Figure 1 This diagram illustrates physical channels used in a 3GPP NR system and a general signal transmission method using the same.

[0114] When a UE is powered on again after powering off or enters a new cell, in step S101, the UE performs an initial cell search procedure (e.g., establishing synchronization with the base station). To this end, the UE receives a synchronization signal block (SSB) from the base station. The SSB includes the primary synchronization signal (PSS), the secondary synchronization signal (SSS), and the physical broadcast channel (PBCH). The UE establishes synchronization with the base station based on the PSS / SSS and obtains information such as the cell identity (ID). The UE can obtain broadcast information in the cell based on the PBCH. During the initial cell search, the UE can receive a downlink reference signal (RS) to monitor downlink channel status.

[0115] After the initial cell search, the UE may acquire more specific system information by receiving a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) based on information of the PDCCH in step S102 .

[0116] In steps S103 to S106, the UE may perform a random access procedure to access the base station. For random access, the UE may transmit a preamble to the base station on a physical random access channel (PRACH) (S103) and receive a response message to the preamble on a PDCCH and a corresponding PDSCH (S104). In the case of contention-based random access, the UE may further perform a contention resolution procedure by transmitting a PRACH (S105) and receiving a PDCCH and a corresponding PDSCH (S106).

[0117] After the aforementioned process, the UE may receive the PDCCH / PDSCH (S107) and transmit the Physical Uplink Shared Channel (PUSCH) / Physical Uplink Control Channel (PUCCH) (S108) as a standard downlink / uplink signaling process. The control information sent from the UE to the base station is called uplink control information (UCI). UCI includes hybrid automatic repeat request acknowledgement / negative acknowledgement (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 typically transmitted on the PUCCH, it can be transmitted on the PUSCH when control information and traffic data need to be transmitted simultaneously. In addition, UCI can be transmitted aperiodically via the PUSCH based on a request / command from the network.

[0118] Figure 2 The figure shows the radio frame structure. In NR, uplink and downlink transmissions are configured in frames. Each radio frame has a length of 10ms and is divided into two 5ms half-frames (HF). Each half-frame is divided into five 1ms subframes (SF). A subframe is divided into one or more slots, and the number of slots in a subframe depends on the subcarrier spacing (SCS). Depending on the cyclic prefix (CP), each slot includes 12 or 14 orthogonal frequency division multiplexing (OFDM) symbols. When using a normal CP, each slot includes 14 OFDM symbols. When using an extended CP, each slot includes 12 OFDM symbols.

[0119] Table 1 exemplarily shows that the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to the SCS when a normal CP is used.

[0120] [Table 1]

[0121]

[0122] N slot symb: The number of symbols in a time slot

[0123] N frame,u slot : Number of time slots in a frame

[0124] N subframe,u slot : Number of time slots in a subframe

[0125] Table 2 shows that the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to SCS when the extended CP is used.

[0126] [Table 2]

[0127]

[0128] The structure of the frame is only an example. The number of subframes, the number of time slots, and the number of symbols in a frame may vary.

[0129] In NR systems, OFDM parameter sets (e.g., SCSs) can be configured differently for multiple cells aggregated for a single UE. Consequently, the (absolute time) duration of a time resource (e.g., SF, time slot, or TTI) consisting of the same number of symbols (referred to as a time unit (TU) for simplicity) can be configured differently between the aggregated cells. Symbols can include OFDM symbols (or CP-OFDM symbols) and SC-FDMA symbols (or Discrete Fourier Transform-Spread-OFDM (DFT-s-OFDM) symbols).

[0130] Figure 3 A resource grid showing a time slot. A time slot consists of multiple symbols in the time domain. For example, when using a normal CP, a time slot consists of 14 symbols. However, when using an extended CP, a time slot consists of 12 symbols. A carrier consists of 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 part (BWP) can be defined as multiple consecutive physical RBs (PRBs) in the frequency domain and corresponds to a single parameter set (e.g., SCS, CP length, etc.). A carrier can include up to N (e.g., five) BWPs. Data communication can be performed using enabled BWPs, and only one BWP can be enabled for a UE. In the resource grid, each element is called a resource element (RE), and one complex symbol can be mapped to each RE.

[0131] Figure 4The figure illustrates an example of mapping physical channels within a time slot. In NR systems, frames feature a self-contained structure in which all DL control channels, DL or UL data, and UL channels can be included in a single time slot. For example, the first N symbols of a time slot can be used to carry DL channels (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 UL channels (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 vice versa. Some symbols in a subframe at the DL-to-UL switching time can be configured as GPs.

[0132] The PDCCH carries DCI. For example, the PDCCH (i.e., DCI) can carry information about the transport format and resource allocation of the DL Shared Channel (DL-SCH), resource allocation information for the Uplink Shared Channel (UL-SCH), paging information for the Paging Channel (PCH), system information about the DL-SCH, resource allocation for higher-layer control messages (such as the RAR sent on the PDSCH), transmit power control commands, and information about the activation / release of configured scheduling. The DCI includes a cyclic redundancy check (CRC). Depending on the owner or usage of the PDCCH, the CRC is masked with various identifiers (IDs), such as the Radio Network Temporary Identifier (RNTI). For example, if the PDCCH is for a specific UE, the CRC is masked with the UE ID (e.g., the Cell RNTI (C-RNTI)). If the PDCCH is for a paging message, the CRC is masked with the Paging RNTI (P-RNTI). If the PDCCH is for system information (e.g., the System Information Block (SIB)), the CRC is masked with the System Information RNTI (SI-RNTI). When the PDCCH is used for RAR, the CRC is masked by the random access RNTI (RA-RNTI).

[0133] Figure 5 Figure 1 shows an exemplary PDSCH reception and ACK / NACK transmission process. Figure 5, the UE may detect the PDCCH in slot #n. The PDCCH includes DL scheduling information (e.g., DCI format 1_0 or DCI format 1_1) and indicates DL assignment to PDSCH offset K0 and PDSCH-HARQ-ACK report offset K1. After receiving the PDSCH in slot #(n+K) according to the scheduling information in slot #n, the UE may send UCI on the PUCCH in slot #(n+K1). The UCI may include a HARQ-ACK response to the PDSCH. In the case where the PDSCH is configured to carry up to one TB, the HARQ-ACK response may be configured in one bit. In the case where the PDSCH is configured to carry up to two TBs, the HARQ-ACK response may be configured in two bits if spatial bundling is not configured, and may be configured in one bit if spatial bundling is configured. When slot #(n+K1) is designated as HARQ-ACK transmission timing for multiple PDSCHs, UCI transmitted in slot #(n+K1) includes HARQ-ACK responses to the multiple PDSCHs.

[0134] Figure 6 FIGURE 1 shows an exemplary PUSCH transmission process. Figure 6 , the UE can detect the PDCCH in time slot #n. The PDCCH includes DL scheduling information (e.g., DCI format 1_0 or 1_1). Then, based on the scheduling information in time slot #n, the UE can send the PUSCH in time slot #(n+K2). The PUSCH includes the UL-SCH TB.

[0135] position

[0136] Positioning may refer to determining the geographic location and / or velocity of a UE based on measurements of radio signals. Location information may be requested by and reported to a client (e.g., an application) associated with the UE. This location information may also be requested by a client within or connected to the core network. This location information may be reported in a standard format, such as a format for cell-based or geographic coordinates, along with an estimated error in the UE's position and velocity and / or the positioning method used for positioning.

[0137] Figure 7 is a diagram illustrating an exemplary positioning protocol configuration for positioning a UE, to which various embodiments are applicable.

[0138] refer to Figure 7The LTE Positioning Protocol (LPP) can be used as a point-to-point protocol between a location server (E-SMLC and / or SLP and / or LMF) and a target device (UE and / or SET) for positioning the target device using location-related measurements obtained from one or more reference resources. The target device and the location server can exchange measurements and / or location information based on Signal A and / or Signal B via the LPP.

[0139] NRPPa may be used for information exchange between a reference source (access node and / or BS and / or TP and / or NG-RAN node) and a location server.

[0140] The NRPPa protocol can provide the following functions.

[0141] - E-CID position information transmission. This function allows the reference source to exchange position information with the LMF for E-CID positioning purposes.

[0142] - OTDOA information transmission. This function allows the reference source to exchange information with the LMF for the purpose of OTDOA positioning.

[0143] - Reporting of general error situations. This feature allows reporting of general error situations for which no function-specific error messages have been defined.

[0144] Positioning methods supported in NG-RAN may include GNSS, OTDOA, E-CID, air pressure sensor positioning, WLAN positioning, Bluetooth positioning, TBS, uplink time difference of arrival (UTDOA), etc. Although any one positioning method may be used for UE positioning, two or more positioning methods may be used for UE positioning.

[0145] OTDOA (Observed Time Difference of Arrival)

[0146] Figure 8 is a diagram illustrating an observed time difference of arrival (OTDOA) positioning method to which various embodiments are applicable;

[0147] The OTDOA positioning method uses time measurements of downlink signals received by a UE from multiple TPs, including eNBs, ng-eNBs, and PRS-only TPs. The UE uses location assistance data received from a location server to measure the time of received downlink signals. The UE's location can be determined based on these measurements and the geographic coordinates of neighboring TPs.

[0148] A UE connected to a gNB may request a measurement gap to perform OTDOA measurements from a TP. If the UE does not know the SFN of at least one TP in the OTDOA assistance data, the UE may use autonomous gaps to obtain the SFN of the OTDOA reference cell before requesting a measurement gap to perform reference signal time difference (RSTD) measurements.

[0149] Here, RSTD can be defined as the minimum relative time difference between two subframe boundaries 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 closest to the subframe received from the measurement cell. The reference cell can be selected by the UE.

[0150] For accurate OTDOA measurements, it is necessary to measure the time of arrival (ToA) of signals received from three or more geographically distributed TPs or base stations. For example, the ToA of each of TP1, TP2, and TP3 can be measured, and based on the three ToA values, the RSTD between TP1 and TP2, the RSTD between TP2 and TP3, and the RSTD between TP3 and TP1 can be calculated. Based on the calculated RSTD values, a geometric hyperbola is determined, and the intersection of the hyperbolas can be estimated as the UE's position. In this case, each ToA measurement may have accuracy and / or uncertainty, and based on the measurement uncertainty, the UE's estimated position can be known to a certain range.

[0151] For example, the RSTD of two TPs may be calculated based on Equation 1 below.

[0152] [Equation 1]

[0153]

[0154] In Equation 1, c is the speed of light, {x t , y t} are the (unknown) coordinates of the target UE, {x i , y i} are the (known) coordinates of TP, and {x1, y1} are the coordinates of a reference TP (or another TP). Here, (T i -T1) is the transmission time offset between the two TPs, called the "real time difference" (RTD), and n i and n1 is the UE ToA measurement error value.

[0155] E-CID (Enhanced Cell ID)

[0156] In the Cell ID (CID) positioning 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.

[0157] In addition to the CID positioning method, the E-CID positioning method can also use additional UE measurements and / or NG-RAN radio resources to improve the UE position estimate. Although the E-CID positioning method can partially utilize the same measurement method as the measurement control system on the RRC protocol, additional measurements for UE position measurement alone are generally not performed. In other words, no additional measurement configuration or measurement control message may be provided for UE position measurement. The UE does not expect that additional measurement operations for position measurement alone will be requested, and the UE can report measurement values ​​obtained by generally measurable methods.

[0158] For example, the serving gNB can use the E-UTRA measurements provided by the UE to implement the E-CID positioning method.

[0159] The measurement elements that can be used for E-CID positioning may be, for example, as follows.

[0160] UE measurements: E-UTRA Reference Signal Received Power (RSRP), E-UTRA Reference Signal Received Quality (RSRQ), UE E-UTRA Receive (Rx)-Transmit (Tx) Time Difference, GERAN / WLAN Reference Signal Strength Indicator (RSSI), UTRAN Common Pilot Channel (CPICH) Received Signal Code Power (RSCP) and / or UTRAN CPICH Ec / Io

[0161] E-UTRAN measurements: ng-eNB Rx-Tx time difference, timing advance (T ADV ) and / or AoA

[0162] Here, T ADV It can be divided into Type 1 and Type 2 as follows.

[0163] T ADV Type 1 = (ng-eNB Rx-Tx time difference) + (UE E-UTRA Rx-Tx time difference)

[0164] T ADV Type 2 = ng-eNB Rx-Tx time difference

[0165] AoA can be used to measure the direction of a UE. AoA is defined as the estimated angle of the UE in a counterclockwise direction from the eNB / TP. In this case, the geographic reference direction may 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 number of antenna arrays. When the antenna array is arranged with equal spacing, the signals received at adjacent antenna elements may have a constant phase rotation.

[0166] UTDOA (Uplink Time Difference of Arrival)

[0167] UTDOA is a method for determining the UE's location by estimating the arrival time of the SRS. When calculating the estimated SRS arrival time, the serving cell is used as a reference cell, and the UE's location is estimated based on the time difference of arrival with another cell (or base station / TP). To implement UTDOA, the E-SMLC can indicate the serving cell of the target UE, thereby instructing the target UE to transmit SRS. In addition, the E-SMLC can provide configurations such as periodic / aperiodic SRS, bandwidth, and frequency / group / sequence hopping.

[0168] Multiple RTT (round trip time)

[0169] Figure 9 is a diagram illustrating an exemplary multiple round trip time (multi-RTT) positioning method to which various embodiments may be applicable.

[0170] refer to Figure 9 (a) illustrates an exemplary RTT process in which an initiating device and a responding device perform ToA measurements, and the responding device provides the ToA measurements to the initiating device for RTT measurement (calculation). The initiating device can be a TRP and / or a UE, and the responding device can be a UE and / or a TRP.

[0171] The initiating device may send an RTT measurement request, and the responding device may receive the RTT measurement request ( 1301 ).

[0172] The initiating device may send an RTT measurement signal at t0, and the responding device may obtain a ToA measurement at t1 (1303).

[0173] The responding device may send an RTT measurement signal at t2, and the initiating device may obtain a ToA measurement at t3 (1305).

[0174] The responding device may send information about [t2-t1], and the initiating device may receive the information and calculate the RTT (1307) through Equation 2. The information may be sent and received based on a separate signal or in an RTT measurement signal (1305).

[0175] [Equation 2]

[0176]

[0177] refer to Figure 9 (b) RTT may correspond to a dual-range measurement between two devices. Position estimation can be performed based on the corresponding information, and multilateration can be used for position estimation. Based on the measured RTT, d1, d2, and d3 can be determined, and the location of the target device can be determined as the intersection of the circumferences of circles centered at BS1, BS2, and BS3 (or TRP) with radii d1, d2, and d3, respectively.

[0178] NG-RAN positioning architecture and process

[0179] Figure 10 Figure 1 illustrates the positioning structure of the next generation (NG) radio access network (RAN). The NG RAN may be referred to as NRRAN or 5G RAN.

[0180] The AMF may receive a request for positioning services related to a specific target UE from another entity (e.g., a Gateway Mobile Location Center (GMLC) or a UE), or may decide to initiate positioning services on behalf of the specific target UE itself (e.g., in the case of an IP Multimedia Subsystem (IMS) emergency call). The AMF may then forward the positioning service request to the LMF. The LMF may process the positioning service request, where processing the positioning service request may include sending assistance data to the target UE for UE-based and / or UE-assisted positioning and / or positioning of the target UE. The LMF sends the positioning service result (e.g., the UE's position estimate) to the AMF. When positioning services are requested by other entities (e.g., a GMLC or a UE), the AMF sends the positioning service result to the other entity.

[0181] The NG-RAN node can control TRP / TP, such as RRM or DL-PRS-only TP, to support PRS-based Terrestrial Beacon System (TBS).

[0182] The LMF may be connected to an Enhanced Serving Mobile Location Centre (E-SMLC) to access Universal Terrestrial Radio Access Network (UTRAN) information.

[0183] The LMF can be connected to a Secure User Plane Location (SUPL) Location Platform (SLP), which is responsible for positioning relative to the user plane.

[0184] Figure 11 Figure 1 shows an example of location services supported in NG-RAN.

[0185] When the UE is in the Connection Management Idle (CM-IDLE) state, if the AMF receives a Location Service Request, the AMF performs a network-triggered Service Request to configure the signaling for the connection to the UE and the allocation of a specific serving gNB / ng-eNB. Figure 11 , assuming the UE is in connected mode.

[0186] A location service request for the UE may be triggered, and the request to the UE may be one of steps 1101, 1102, and 1103. For example, an entity in the 5GC such as the GMLC may request location services (e.g., positioning) for the target UE from the serving AMF (1101). Alternatively, the serving AMF may trigger location services for the target UE itself (e.g., to locate the UE for an emergency call) (1102). In addition, the UE may request location services (e.g., positioning or assistance data transmission) from the serving AMF at the NAS level (1103).

[0187] The AMF forwards the location service request to the LMF (1104).

[0188] The LMF provides services in the NG-RAN to obtain location measurements or assistance data and initiates a positioning procedure with neighboring ng-eNB / gNB (1105).

[0189] (Instead of step 1105 or in addition to step 1105), the LMF initiates a positioning procedure with the UE to obtain a position estimate or positioning measurements or sends position assistance data to the UE (1106).

[0190] The LMF provides a location service response (1107) to the AMF (e.g., success or failure and if a location estimate for the UE is obtained).

[0191] The AMF provides (in step 1101 ) a location service response ( 1108 ) (eg, a location estimate for the UE) to the 5GC entity.

[0192] The AMF (in step 1102 ) supports the service triggered in step 1102 (eg, providing a location estimate related to an emergency call to the GMLC) based on the location service response ( 1109 ) received in step 1107 .

[0193] The AMF provides (in step 1103) a location service response (eg, a location estimate for the UE) to the UE (1110).

[0194] SRS (Sounding Reference Signal) for positioning

[0195] In Rel. 15 NR systems, periodic, aperiodic, and semi-persistent Rel. 15 SRS 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.

[0196] In Rel. 16 / 17 NR systems, periodic, aperiodic, and semi-persistent SRS for positioning can be sent for UL RTOA, UL SRS-RSRP, UL-AOA, and gNBRx-Tx time difference measurement at the BS, thereby supporting UL TDOA, UL AOA, and multi-RTT.

[0197] To avoid confusion between the SRS used for positioning and the Rel. 15 SRS, the SRS used for positioning will be referred to as SRS-p. Unless otherwise specified, SRS may be interpreted as meaning SRS-p in the method newly proposed in this specification.

[0198] If the higher layer parameter SRS-PosResource is configured for SRS (i.e., SRS-p) and the higher layer parameter SpatialRelationInfoPos is configured, the ID of the configuration field of the reference RS is provided. The reference RS can be the SRS, CSI-RS, SS / PBCH block configured by the higher layer parameters SRS-Resource or SRS-PosResource or DL ​​PRS configured in the serving cell or SS / PBCH block.

[0199] It is not expected that a UE transmits multiple SRS resources with different spatial relationships on the same OFDM symbol.

[0200] If the higher layer parameter SpatialRelationInfoPos is not configured, the UE may use a fixed spatial domain transmission filter or different spatial domain transmission filters to transmit the SRS-p configured by the higher layer parameter SRS-PosResource across multiple SRS resources.

[0201] In RRC_CONNECTED mode, the UE sends SRS-p configured by the higher layer parameter SRS-PosResource within the active UL BWP.

[0202] Only one RS source is provided for the higher layer parameter SpatialRelationInfoPos provided for each SRS-p resource.

[0203] In case of operation on the same carrier, if the SRS-p collides with the scheduled PUSCH, the SRS-p is dropped on the colliding symbols.

[0204] The UE does not expect that the SRS-PosResource will be configured on the carrier of the serving cell with a slot format consisting of DL / UL symbols that are not configured for PUSCH / PUCCH transmission.

[0205] Depending on UE capabilities, SRS-p resources may be configured in association with the initial UL BWP and transmitted within the initial UL BWP in RRC_INACTIVE mode using the same CP and SCS as those configured for the initial UL BWP. Depending on UE capabilities, SRS-p resources for positioning may be configured outside the initial BWP in RRC_INACTIVE mode, and the frequency location, bandwidth, SCS, and CP length may be configured for SRS-p transmission. SRS-p resources configured outside the initial BWP in RRC_INACTIVE mode are configured in the same bandwidth and CC as the initial UL BWP.

[0206] ISAC (Integrated Sensing and Communication)

[0207] Various methods for using wireless sensing in recent wireless communication systems have been widely discussed. Conventional radar technology is often considered for wireless sensing purposes. However, radar technology for sensing may have limitations, as it is specialized for sensing and may not consider communication characteristics. Furthermore, transmitting and receiving nodes may require separate equipment to transmit and receive signals for wireless sensing. To address these issues, methods for using wireless sensing in wireless communication systems supporting cellular networks (such as 5G and / or next-generation 6G) are being actively researched. These methods include, for example, Integrated Sensing and Communication (ISAC) or Joint Communication and Sensing (JCAS).

[0208] 3GPP standardization has initiated research to support ISAC in 5G / 6G. According to TR 22.837, published by the 3GPP SA1 WG, wireless sensing is defined as the use of 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. Furthermore, methods are being considered to share or reuse radio waves intended for communication (e.g., RSs used for communication, such as SSB, DMRS, CSI-RS, and / or SRS) with radio waves intended for sensing, or to design separate radio waves for wireless sensing.

[0209] Generally speaking, wireless sensing supported in ISAC involves a process in which a signal transmitted from a transmitter is reflected from a target object and received by a receiver. Different sensing modes can be defined depending on the relationship between the transmitter and receiver. Depending on whether the transmitter and receiver are matched, the case where the transmitter and receiver are matched can be defined as a single-station sensing mode, and the case where the transmitter and receiver are mismatched can be defined as a dual-station sensing mode.

[0210] Figure 12 Figure 1 illustrates an example of wireless sensing modes supported in ISAC.

[0211] refer to Figure 12 ,Considering the transmission and reception operations in the 3GPP standard and the nodes involved therein, the ,sensing modes can be broadly classified as follows.

[0212] (a) BS single-station sensing mode: The BS sends radio waves and receives the reflected signals.

[0213] (b) BS-to-BS dual-station sensing mode: Another BS receives the reflected signal of the radio wave transmitted by a specific BS.

[0214] (c) BS-to-UE dual-station sensing mode: The UE receives the reflected signal of the radio wave transmitted by the BS.

[0215] (d) UE single-station sensing mode: The UE transmits radio waves and receives reflected signals.

[0216] (e) UE-to-UE dual-station sensing mode: Another UE receives a reflected signal of a radio wave transmitted by a specific transmitting UE.

[0217] (f) UE-to-BS dual-station sensing mode: The BS receives the reflected signal of the radio wave transmitted by the transmitting UE.

[0218] In addition to the above six use cases, a sensing mode including multiple transmitting / receiving nodes may be referred to as a multi-station sensing mode.

[0219] Wireless sensing applications through ISAC / JCAS are considered in various scenarios. Generally, wireless sensing is considered for the purpose of obtaining information about a target without a communication module (or independent of a communication module). For example, the possible scenarios can be broadly categorized into three types.

[0220] (1) Object detection and tracking: This scenario aims to detect target objects or people and track their location information. For example, the following scenarios can be considered: intrusion detection in indoor / outdoor environments, tracking the position of unmanned aerial vehicles (UAVs) or automated guided vehicles (AGVs), and supporting autonomous driving.

[0221] (2) Environmental Monitoring: This scenario aims to collect information about the surrounding environment of the sending / receiving node. For example, the following scenarios can be considered: rainfall observation and flood detection.

[0222] (3) Motion detection: This scenario aims to detect the motion of a target. For example, scenarios for distinguishing human movement or gestures can be considered.

[0223] The performance metrics and levels required for each of the above scenarios can vary and differ from one another. To design an appropriate ISAC / JCAS for the quality of service required for each scenario, various key performance requirements need to be considered. 3GPP standard TS 22.137 defines the key performance requirements required for each service scenario as follows: positioning estimation accuracy, velocity estimation accuracy, reliability (confidence), sensing resolution, missed detection probability, false alarm probability, maximum sensing service latency, and refresh rate. The required level for each key performance requirement can vary depending on the service scenario.

[0224] SRS BW aggregation for positioning

[0225] Hereinafter, operations of a BS and a UE for applying bandwidth (BW) aggregation to transmission and reception of SRS-p and a signaling method thereof will be described.

[0226] The proposal for SRS-p BW aggregation described below can also be applied to the aforementioned ISAC environment.

[0227] In NR, the introduction of bandwidth aggregation was discussed in Rel-18 as a method to improve positioning accuracy. Bandwidth aggregation is a technique that increases the total bandwidth used for positioning by stacking RSs transmitted on one or more carriers. To apply bandwidth aggregation, conditions such as phase continuity between transmitted RSs must be met. Therefore, Rel-18 only considers cases where the conditions for transmitting and receiving RSs using the same antenna are met on consecutive carriers within the band.

[0228] For example, to meet phase continuity requirements, RSs targeting BW aggregation may need to be transmitted and received via a single radio frequency (RF) chain. For example, in the case of DL RSs, the UE may aggregate positioning frequency layers (PFLs). In this case, all targeted PFLs need to be transmitted via a single transmit chain of the TRP and the same antenna reference point. In the case of UL RSs, the TRP may aggregate PFLs. In this scenario, all targeted PPDUs need to be transmitted via a single transmit chain of the UE and the same antenna reference point.

[0229] Although the present disclosure focuses on BW aggregation of SRS-p based on UL positioning in 3GPP NR, the proposed method is not limited thereto and can generally be applied to other UL or DL ​​signal BW aggregation scenarios. In addition, the proposed method assumes intra-band contiguous carriers, but the proposed method is not limited thereto and can be applied to BW aggregation scenarios where different transmission and reception assumptions are applied. The proposed method is not limited to 3GPP NR systems and can generally be applied to other public communication systems such as LTE or 6G, as long as BW aggregation is performed on RS such as SRS-p or similar operations are used. The proposed method can be applied to all types of transmission and reception methods and positioning technologies expected by both the BS and the UE.

[0230] The methods proposed in the present disclosure can be implemented independently without additional combination, or can be implemented in a combined form by combining one or more methods. Some of the terms, symbols, sequences, etc. used herein can be replaced with other terms, symbols, sequences, etc.

[0231] Hereinafter, we will describe operations of a UE and a BS and their signaling methods for supporting BW aggregation of SRS-p transmitted and received through the same antenna under the condition of intra-band contiguous carriers. The condition of intra-band contiguous carriers means that SRS-p BW aggregation is applied to (at least some / all) contiguous carriers among multiple carriers included in a frequency band.

[0232] To support SRS-p BW aggregation, both the BS and the UE should have consistent information about whether BW aggregation is applied to SRS-p transmission and reception. To this end, the BS can provide the UE with information about SRS-p resource pairs that require BW aggregation. The information about the SRS-p resource pairs may consist of a set of SRS-p transmitted on two or more different carriers. If an SRS-p designated as an SRS-p resource pair is transmitted and meets specific conditions, the UE can be configured to apply BW aggregation to the SRS-p transmission. SRS-p BW aggregation may refer to an operation that meets the following conditions: ensuring phase continuity of SRS-p, applying the same timing advance (TA), and / or using the same power level. To this end, the BS can provide the UE with configuration information about the SRS-p resource pairs through higher-layer signaling such as SIB or RRC. Subsequently, the BS can determine whether BW aggregation is applied to the SRS-p transmitted by the UE based on the provided / indicated information and reflect the results of the measurements performed. The UE may receive this information and determine to perform BW aggregation for SRS-p transmission, where the SRS-p resource pair is configured / indicated.

[0233] To configure an SRS-p resource pair, at least some of the following may apply.

[0234] For example, SRS-p resource pairs can be configured based on SRS-p resources or SRS-p resource sets. For example, SRS-p resources or SRS-p resource sets on different carriers can be defined as SRS-p resource pairs. As a specific implementation example, each SRS-p resource or SRS-p resource set can include information about an ID for providing information about the SRS-p resource pair, and SRS-p resources or SRS-p resource sets on different carriers with the same ID information can be defined as an SRS-p resource pair. Configuring SRS-p resource pairs based on SRS-p resources or SRS-p resource sets offers advantages in terms of BS configuration flexibility.

[0235] For example, SRS-p resource pairs can be configured based on a BWP or a carrier. For example, SRS-p resource pairs can be configured on different carriers or BWPs belonging to different carriers. As a specific implementation example, the configuration information for each BWP or carrier may include information about an ID, indicating the configuration of the SRS-p resource pair. The UE may expect that the SRS-p resource pairs are assumed to be on different carriers or on BWPs belonging to different carriers with the same ID. Configuring SRS-p resource pairs based on a BWP or a carrier has the advantages of reducing the signaling overhead for configuring SRS-p resource pairs and allowing multiple SRS resource sets to be configured as SRS-p resource pairs through one-time signaling.

[0236] As an additional condition, if certain conditions are met, the UE may be determined or configured to perform BW aggregation only on SRS-p resource (sets) belonging to a BWP or carrier set as an SRS-p resource pair. For example, the certain conditions may include performing BW aggregation only on SRS-p resource (sets) assuming the same comb type, symbol length, and / or position. Otherwise, both the BS and UE may not perform BW aggregation based on the SRS-p resource pair. Therefore, the UE may expect the same comb type, symbol length (e.g., number of symbols, SCS, etc.), and / or position (e.g., period and offset, starting symbol, etc.) to be configured for the SRS-p resource (sets) belonging to the SRS-p resource pair. In other words, the UE may assume that SRS-p resource (sets) configured with the same comb type, symbol length (e.g., number of symbols, SCS, etc.), and / or position (e.g., period and offset, starting symbol, etc.) are designated as the SRS-p resource pair for BW aggregation. Otherwise, the UE may not assume an SRS-p resource pair for BW aggregation.

[0237] Upon receiving configuration information regarding an SRS-p resource pair, the UE can perform transmissions on the SRS-p resource pair (e.g., SRS transmissions on the SRS-p resource set belonging to the SRS-p resource pair). In the case of semi-persistent and aperiodic transmissions on SRS-p resources (sets) in the prior art, transmissions on each SRS-p resource (set) can be performed for each BWP (i.e., per CC BWP). Even when using SRS-p resource pairs, activation / triggering of SRS-p resources (sets) can be independently indicated for each BWP (and / or per CC) in the same manner. If transmission times are aligned, SRS-p can be transmitted with BW aggregation applied. This has the advantages of maintaining independent indication for each SRS-p resource (set) and, if conditions for simultaneous transmission are met, benefiting from the BW aggregation gains of the SRS-p resource pair. The activation indication can be a MAC CE command for activating semi-persistent transmission. The trigger indication may be a DCI field for aperiodic SRS transmission (ie, information on a DL / UL grant DCI indicating an SRS resource set and requesting aperiodic SRS transmission).

[0238] For example, when one of the SRS-p resources (sets) set as an SRS-p resource pair in a specific BWP / CC is activated / triggered in the form of semi-persistent and aperiodic transmission, the UE may be configured to transmit all SRS-p resources (sets) in the SRS-p resource pair. Figure 13 , an SRS resource set configuration may be provided for each ULBWP of each CC, and each SRS resource set may include multiple SRS resources. The SRS resource set configuration may include information indicating that the corresponding SRS resource set is used for positioning and information indicating the type of the corresponding SRS resource set among the following types: aperiodic / periodic / semi-persistent. The list of SRS-p resource sets for BW aggregation refers to the above-mentioned SRS-p resource set pair, and it is assumed that one list is configured across CCs. For example, in Figure 13In the example, the list includes i) SRS resource set #1 for UL BWP #a of CC #1, ii) SRS resource set #2 for UL BWP #d of CC #2, and iii) SRS resource set #k for UL BWP #e of CC #3. For ease of explanation, it is assumed that the SRS resource sets included in the list meet the conditions for BW aggregation (e.g., comb size, symbol length, symbol position, etc.). For example, assuming the semi-persistent type is configured, if a MAC CE for SRS activation is received for i) SRS resource set #1 for UL BWP #a of CC #1, the UE may activate i) SRS resource set #1 for UL BWP #a of CC #1, ii) SRS resource set #2 for UL BWP #d of CC #2, and iii) SRS resource set #k for UL BWP #e of CC #3. In addition, the UE maintains phase continuity across i) SRS resource set #1 of UL BWP #a of CC #1, ii) SRS resource set #2 of UL BWP #d of CC #2, and iii) SRS resource set #k of UL BWP #e of CC #3, and transmits BW aggregate SRS-p thereon. For example, assuming that an aperiodic type is configured, if i) a DL / UL grant DCI requesting SRS transmission on SRS resource set #1 of UL BWP #a of CC #1 is received, the UE maintains phase continuity across i) SRS resource set #1 of UL BWP #a of CC #1, ii) SRS resource set #2 of UL BWP #d of CC #2, and iii) SRS resource set #k of UL BWP #e of CC #3, and transmits BW aggregate SRS-p thereon.

[0239] Similarly, if deactivation of semi-persistent SRS-p is indicated, the UE may be configured to stop transmission on all semi-persistent SRS-p resource pairs having an SRS-p resource pair relationship with the deactivated SRS-p resource set.

[0240] As described above, the UE performs BW aggregation for an SRS-p resource pair. When simultaneous transmission of an SRS-p resource set belonging to an SRS-p resource pair is required to obtain benefits from BW aggregation, the proposed method has the advantage of reducing signaling overhead for sending indications.

[0241] For example, the MAC CE or DCI for activating / triggering the SRS-p resource pair may include information indicating whether simultaneous transmission on the SRS-p resource pair is required. Such simultaneous scheduling may also be determined to be applied only when there is a separate indication.

[0242] BW aggregation is a technology for improving positioning accuracy. The BS and UE need to perform mandatory operations to send and receive RSs to which BW aggregation is applied, which may potentially impair the efficiency of sending and receiving other signals / channels. To address these issues, the BS can be configured to provide the UE with configuration information about the SRS-p resource pair in advance, and separately provide an indication for applying BW aggregation to the SRS-p resource pair. When the UE receives a BW aggregation activation indication for the SRS-p resource pair via a MAC CE, if the SRS-p resource pair is met, the UE can perform BW aggregation on the SRS-p resources to be sent in the future. When the UE does not receive activation for the SRS-p resource pair or receives a deactivation indication via a MAC CE, the UE can be configured not to perform BW aggregation on the SRS-p resource pair.

[0243] Alternatively, if the BW aggregation indication for an SRS-p resource pair is triggered by DCI, the UE may be configured to perform BW aggregation on the aperiodic SRS-p resource pair indicated by the same DCI. Upon receiving a DCI without a BW aggregation trigger indication for an SRS-p resource pair, the UE does not need to apply BW aggregation to transmissions on the SRS-p resource pair.

[0244] Alternatively, if the BW aggregation indication of the SRS-p resource pair is triggered by DCI, the UE may be configured to perform BW aggregation for the SRS-p resource pair to be transmitted at a time point or time period associated with the corresponding DCI. In this case, the SRS-p resource pair transmitted at that time point or time period may also include an SRS-p resource pair at a different time point that is not scheduled by the corresponding DCI.

[0245] In the above explanation, the number N (N>1) of SRS-p resources / resource sets belonging to an SRS-p resource pair may vary depending on the RRC configuration information. The term "pair" is intended to avoid confusion with an SRS resource "set," which is an RRC information element (IE) defined in the current NR standard. Therefore, N is not limited to N=2. In other words, while N can be 2, the present disclosure is not limited thereto, and N may also be set to 3 or greater. The term "SRS-p resource pair" may also be expressed using, for example, a list / group of BW-aggregated SRS-p resources.

[0246] Figure 14 is a diagram for explaining semi-persistent SRS transmission in a wireless communication system according to an embodiment.

[0247] Reference Figure 14, the UE receives configuration information about SRS-p for positioning from the network (A05). The configuration information about SRS-p may be received via RRC signaling. The configuration information may include SRS resource set configuration information. The SRS resource set information may include information indicating the type of the corresponding SRS resource set among the following types: aperiodic / periodic / semi-persistent. For ease of explanation, Figure 14 The semi-persistent type is assumed in

[15] . Configuration information about SRS-p can be provided for each UL BWP of each CC.

[0248] The UE may receive configuration information regarding SRS-p BW aggregation from the network (A10). The configuration information regarding SRS-p BW aggregation may be received via RRC signaling. The configuration information regarding SRS-p BW aggregation may include a list of SRS-p resource sets used for BW aggregation. The list of SRS-p resource sets used for BW aggregation may be configured across multiple CCs.

[0249] The UE may receive an activation command for the semi-persistent SRS-p from the network (A15). The activation command for the semi-persistent SRS-p may be received via MAC signaling.

[0250] For ease of explanation, it is assumed that the activation command for the semi-persistent SRS-p indicates activation of one of the SRS-p resource sets included in the list. Based on the instruction to activate one of the SRS-p resource sets included in the list, the UE can activate the SRS-p resource sets included in the list across all CCs.

[0251] Based on the activation of the SRS-p resource set, the UE may periodically transmit BW-aggregated semi-persistent SRS-p (A20, A21, and A22).

[0252] The UE may receive a deactivation command for semi-persistent SRS-p from the network (A25). The deactivation command for semi-persistent SRS-p may be received via MAC signaling. If the deactivation command for semi-persistent SRS-p indicates deactivation of one of the SRS-p resource sets included in the list, the UE may deactivate all SRS-p resource sets included in the list across all CCs.

[0253] Figure 15 is a diagram for explaining aperiodic SRS transmission in a wireless communication system according to an embodiment.

[0254] Reference Figure 15, the UE receives configuration information about SRS-p for positioning from the network (B05). The configuration information about SRS-p may be received via RRC signaling. The configuration information about SRS-p may include SRS resource set configuration information, and the SRS resource set information may include information indicating the type of the corresponding SRS resource set among the following types: aperiodic / periodic / semi-persistent. For ease of explanation, Figure 15 The non-periodic type is assumed in

[15] . Configuration information about SRS-p can be provided for each UL BWP of each CC.

[0255] The UE may receive configuration information regarding SRS-p BW aggregation from the network (B10). The configuration information regarding SRS-p BW aggregation may be received via RRC signaling. The configuration information regarding SRS-p BW aggregation may include a list of SRS-p resource sets used for BW aggregation. The list of SRS-p resource sets used for BW aggregation may be configured across multiple CCs.

[0256] The UE may receive DCI triggering aperiodic SRS-p by monitoring the PDCCH on at least one CC (B15). It is assumed that the DCI is received on the first CC (B20).

[0257] For ease of explanation, assume that DCI triggers aperiodic SRS-p transmission on a first SRS-p resource set, which is one of the SRS-p resource sets included in the list.

[0258] Based on aperiodic SRS-p transmission being triggered on one of the SRS-p resource sets included in the list, the UE may send BW-aggregated semi-persistent SRS-p not only on the first SRS-p resource set on the first CC but also on all SRS-p resource sets on all CCs included in the list (B25).

[0259] Figure 16 A flowchart illustrating a method in which a UE transmits an SRS according to an embodiment is shown.

[0260] Reference Figure 16 , the UE may receive configuration information ( C05 ) for linking multiple SRS resource sets on multiple CCs to each other for SRS bandwidth aggregation.

[0261] The UE may receive DCI ( C10 ) triggering aperiodic SRS transmission on a first SRS resource set.

[0262] The UE may perform aperiodic SRS transmission (C15). Based on the first SRS resource set triggering the aperiodic SRS transmission being one of the multiple SRS resource sets linked by the configuration information, the UE may perform aperiodic SRS transmission on all CCs in the multiple CCs configured with the multiple SRS resource sets.

[0263] Based on the first SRS resource set being configured in a first CC among multiple CCs and the second SRS resource set linked to the first SRS resource set being configured in a second CC among multiple CCs, non-periodic SRS transmission can be performed by SRS bandwidth aggregation on the first SRS resource set on the first CC and the second SRS resource set on the second CC.

[0264] The UE may maintain phase continuity of aperiodic SRS transmissions performed on a plurality of SRS resource sets linked for SRS bandwidth aggregation.

[0265] Linking multiple SRS resource sets for SRS bandwidth aggregation may be related to the positioning of the UE.

[0266] Configuration information for linking multiple SRS resource sets may be received through RRC signaling.

[0267] Multiple SRS resource sets linked for SRS bandwidth aggregation have the same comb type (eg, size), the same SRS symbol length, and the same SRS symbol position.

[0268] The UE may not assume that SRS resource sets that differ in at least one of comb type, SRS symbol length, or SRS symbol position are aligned with each other for SRS bandwidth aggregation.

[0269] The same power parameter may be configured for multiple SRS resource sets linked for SRS bandwidth aggregation.

[0270] Figure 17 A flowchart illustrating a method in which a BS receives an SRS according to an embodiment is shown.

[0271] Reference Figure 17 , the BS may transmit configuration information ( D05 ) to the UE for linking multiple SRS resource sets on multiple CCs to each other for SRS bandwidth aggregation.

[0272] The BS may transmit a DCI triggering aperiodic SRS transmission on the first SRS resource set to the UE ( D10 ).

[0273] The UE may receive an aperiodic SRS from the UE (D15). Based on the first SRS resource set on which aperiodic SRS transmission is triggered being one of the multiple SRS resource sets linked by the configuration information, the aperiodic SRS may be received in all CCs in the multiple CCs in which the multiple SRS resource sets are configured.

[0274] Based on the first SRS resource set being configured in a first CC among multiple CCs and the second SRS resource set linked to the first SRS resource set being configured in a second CC among multiple CCs, non-periodic SRS reception can be performed by SRS bandwidth aggregation on the first SRS resource set on the first CC and the second SRS resource set on the second CC.

[0275] Phase continuity may be maintained for aperiodic SRS reception performed on a plurality of SRS resource sets linked for SRS bandwidth aggregation.

[0276] Linking multiple SRS resource sets for SRS bandwidth aggregation may be related to the positioning of the UE.

[0277] Configuration information for linking multiple SRS resource sets may be sent through RRC signaling.

[0278] Multiple SRS resource sets linked for SRS bandwidth aggregation have the same comb type (eg, size), the same SRS symbol length, and the same SRS symbol position.

[0279] For SRS bandwidth aggregation, SRS resource sets that are different in at least one of comb type, SRS symbol length, or SRS symbol position may not be linked to each other.

[0280] The same power parameter may be configured for multiple SRS resource sets linked for SRS bandwidth aggregation.

[0281] Figure 18 A communication system 1 to which the present disclosure is applied is illustrated.

[0282] refer to Figure 18The communication system 1 applied to the present disclosure includes wireless devices, a base station (BS), and a network. Herein, a wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G New RAT (NR) or Long Term Evolution (LTE)) and may be referred to as a communication / radio / 5G device. Wireless devices may include (but are not limited to) a robot 100a, vehicles 100b-1 and 100b-2, an extended reality (XR) device 100c, a handheld device 100d, a home appliance 100e, an Internet of Things (IoT) device 100f, and an artificial intelligence (AI) device / server 400. For example, vehicles may include vehicles with wireless communication capabilities, autonomous vehicles, and vehicles capable of performing communication between vehicles. Herein, a vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices and may be implemented in the form of head-mounted devices (HMDs), vehicle-mounted heads-up displays (HUDs), televisions, smartphones, computers, wearable devices, home appliances, digital signage, vehicles, robots, and the like. Handheld devices may include smartphones, smartpads, 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, a base station (BS) and a network may be implemented as wireless devices, and a specific wireless device 200a may operate as a base station (BS) / network node relative to other wireless devices.

[0283] Wireless devices 100a to 100f can connect to a network 300 via a base station (BS) 200. AI technology can be applied to wireless devices 100a to 100f, and wireless devices 100a to 100f can connect to an AI server 400 via the network 300. Network 300 can be configured using a 3G network, a 4G network (e.g., LTE), or a 5G network (e.g., NR). While wireless devices 100a to 100f can communicate with each other via the BS 200 / network 300, wireless devices 100a to 100f can also communicate directly with each other (e.g., sidelink communication) without going through the BS / network. For example, vehicles 100b-1 and 100b-2 can communicate directly (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). IoT devices (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0284] Wireless communication / connections 150a, 150b, or 150c may be established between wireless devices 100a to 100f and BS 200, or between BS 200 and BS 200. Here, the wireless communication / connections may 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)). The wireless device and BS / wireless device may transmit / receive radio signals to / from each other via the wireless communication / connections 150a and 150b. For example, the wireless communication / connections 150a and 150b may transmit / receive signals via various physical channels. To this end, at least a portion of various configuration information configuring processes for transmitting / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes may be implemented based on various proposals of the present disclosure.

[0285] Figure 19 A wireless device suitable for use with the present disclosure is shown.

[0286] refer to Figure 19 , the first wireless device 100 and the second wireless device 200 can transmit radio signals via various RATs (e.g., LTE and NR). Herein, {the first wireless device 100 and the second wireless device 200} may correspond to Figure 18 {wireless device 100x and BS 200} and / or {wireless device 100x and wireless device 100x}.

[0287] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and may further include one or more transceivers 106 and / or one or more antennas 108. The processor 102 may control the memory 104 and / or the transceiver 106 and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed herein. For example, the processor 102 may process information within the memory 104 to generate first information / signals, and then transmit a radio signal including the first information / signals via the transceiver 106. The processor 102 may receive a radio signal including second information / signals via the transceiver 106, and then store information obtained by processing the second information / signals in the memory 104. The memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102. For example, the memory 104 may store software code including commands for executing some or all of the processes controlled by the processor 102 or for executing the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed herein. Herein, the processor 102 and memory 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 106 may be connected to the processor 102 and transmit and / or receive radio signals via one or more antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. The term "transceiver 106" may be interchangeably used with a radio frequency (RF) unit. In embodiments of the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0288] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and may further include one or more transceivers 206 and / or one or more antennas 208. The processor 202 may control the memory 204 and / or the transceiver 206 and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed herein. For example, the processor 202 may process information within the memory 204 to generate third information / signals, and then transmit a radio signal including the third information / signals via the transceiver 206. The processor 202 may receive a radio signal including fourth information / signals via the transceiver 206, and then store information obtained by processing the fourth information / signals in the memory 204. The memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202. For example, the memory 204 may store software code including commands for executing some or all of the processes controlled by the processor 202 or for executing the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed herein. Herein, the processor 202 and memory 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 206 may be connected to the processor 202 and transmit and / or receive radio signals via one or more antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. The term "transceiver 206" may be used interchangeably with an RF unit. In embodiments of the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0289] 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 not limited to) one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). One or more processors 102 and 202 may generate one or more protocol data units (PDUs) and / or one or more service data units (SDUs) according to the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed herein. One or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed herein. The one or more processors 102 and 202 may generate a signal (e.g., a baseband signal) including a PDU, SDU, message, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document, and provide the generated signal to the one or more transceivers 106 and 206. The one or more processors 102 and 202 may receive a signal (e.g., a baseband signal) from the one or more transceivers 106 and 206 and obtain the PDU, SDU, message, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document.

[0290] The one or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. The one or more processors 102 and 202 may be implemented using hardware, firmware, software, or a combination thereof. For 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 the one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational 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 operational flowcharts disclosed in this document may be included in the one or more processors 102 and 202 or stored in one or more memories 104 and 204 to be driven by the one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document may be implemented using firmware or software in the form of code, commands, and / or command sets.

[0291] The one or more memories 104 and 204 may be connected to the one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, codes, instructions, and / or commands. The one or more memories 104 and 204 may be configured by read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, a hard drive, registers, cache memory, computer-readable storage media, and / or combinations thereof. The one or more memories 104 and 204 may be located internally and / or externally to the one or more processors 102 and 202. The one or more memories 104 and 204 may be connected to the one or more processors 102 and 202 via various technologies, such as wired or wireless connections.

[0292] One or more transceivers 106 and 206 may transmit user data, control information, and / or radio signals / channels mentioned in the methods and / or operational 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 operational 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 execute control so that one or more transceivers 106 and 206 may transmit user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may execute control so that one or more transceivers 106 and 206 may receive user data, control information, or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208 and may be configured to transmit and receive user data, control information, and / or radio signals / channels as described in the descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed herein via the 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). The one or more transceivers 106 and 206 may convert received radio signals / channels, etc., from RF band signals to baseband signals for processing by the one or more processors 102 and 202. The one or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc., processed by the one or more processors 102 and 202, from baseband signals to RF band signals. To this end, the one or more transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0293] Figure 20 Another example of a wireless device applicable to the present disclosure is shown. The wireless device can be used according to the usage / service (reference Figure 18 ) are implemented in various forms.

[0294] refer to Figure 20 , wireless devices 100 and 200 may correspond to Figure 19 The wireless devices 100 and 200 may be configured by various elements, components, units / portions 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 19 One or more processors 102 and 202 and / or one or more memories 104 and 204. For example, the transceiver 114 may include Figure 19 The control unit 120 is electrically connected to the communication unit 110, the memory 130, and the additional components 140, and controls the overall operation of the wireless device. For example, the control unit 120 may control the electrical / mechanical operation of the wireless device based on the program / code / commands / information stored in the memory unit 130. The control unit 120 may transmit information stored in the memory unit 130 to an external device (e.g., another communication device) via the communication unit 110 via a wireless / wired interface, or may store information received from an external device (e.g., another communication device) via the communication unit 110 via a wireless / wired interface in the memory unit 130.

[0295] The additional components 140 may be configured differently depending on the type of wireless device. For example, the additional components 140 may include at least one of a power supply unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device may be configured as (but not limited to) a robot ( Figure 18 100a), vehicles ( Figure 18 100b-1 and 100b-2), XR devices ( Figure 18 100c), handheld devices ( Figure 18 100d), household appliances ( Figure 18 100e), IoT devices ( Figure 18 100f), digital broadcasting terminals, holographic equipment, public safety equipment, MTC equipment, medical equipment, financial technology equipment (or financial equipment), security equipment, climate / environmental equipment, AI servers / equipment ( Figure 18 400), BS ( Figure 18200), network nodes, etc. The wireless device can be used in a mobile or fixed location depending on the use case / service.

[0296] exist Figure 20 In the present disclosure, the various elements, components, units / portions, and / or modules within wireless devices 100 and 200 may all be connected to each other 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, 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 / portions, and / or modules within wireless devices 100 and 200 may also include one or more elements. For example, control unit 120 may be configured by a collection of one or more processors. As an example, control unit 120 may be configured by a collection of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing unit, and a memory control processor. As another example, memory 130 may be configured by random access memory (RAM), dynamic RAM (DRAM), read-only memory (ROM), flash memory, volatile memory, non-volatile memory, and / or a combination thereof.

[0297] Figure 21 A vehicle or autonomous driving vehicle applicable to the present disclosure is shown. The vehicle or autonomous driving vehicle may be implemented by a mobile robot, a car, a train, a manned / unmanned aerial vehicle (AV), a ship, etc.

[0298] refer to Figure 21 , the vehicle or autonomous driving vehicle 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a drive unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 may be configured as a part of the communication unit 110. Blocks 110 / 130 / 140a to 140d correspond to Figure 20 Blocks 110 / 130 / 140.

[0299] The communication unit 110 can send and receive signals (e.g., data and control signals) to and from external devices such as other vehicles, base stations (e.g., gNBs and roadside units), and servers. The control unit 120 can perform various operations by controlling components of the vehicle or autonomous vehicle 100. The control unit 120 may include an electronic control unit (ECU). The drive unit 140a enables the vehicle or autonomous vehicle 100 to travel on a road. The drive unit 140a may include an engine, a motor, a powertrain, wheels, brakes, a steering system, and the like. The power supply unit 140b can supply power to the vehicle or autonomous vehicle 100 and may include wired / wireless charging circuitry, a battery, and the like. The sensor unit 140c can acquire vehicle status, surrounding environment information, user information, and the like. The sensor unit 140 c may include an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, a slope sensor, a weight sensor, a heading sensor, a location module, a vehicle forward / backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a depth sensor, an ultrasonic sensor, a lighting sensor, a pedal position sensor, etc. The autonomous driving unit 140 d may implement a technology for maintaining the lane in which the vehicle is traveling, a technology for automatically adjusting the speed (e.g., adaptive cruise control), a technology for autonomously traveling along a determined path, a technology for traveling by automatically setting a path if a destination is set, etc.

[0300] For example, the communication unit 110 may receive map data, traffic information data, and the like from an external server. The autonomous driving unit 140d may generate an autonomous driving route and driving plan based on the acquired data. The control unit 120 may control the drive unit 140a so that the vehicle or autonomous driving vehicle 100 moves along the autonomous driving route according to the driving plan (e.g., speed / direction control). During autonomous driving, the communication unit 110 may aperiodically or periodically acquire recent traffic information data from an external server and acquire surrounding traffic information data from neighboring vehicles. During autonomous driving, the sensor unit 140c may acquire vehicle status and / or surrounding environment information. The autonomous driving unit 140d may update the autonomous driving route and driving plan based on the newly acquired data / information. The communication unit 110 may transmit information regarding the vehicle's location, autonomous driving route, and / or driving plan to the external server. The external server may predict traffic information data based on information collected from the vehicle or autonomous driving vehicle using AI technology, etc., and provide the predicted traffic information data to the vehicle or autonomous driving vehicle.

[0301] The above-mentioned embodiments correspond to the combination of elements and features of the present disclosure in a prescribed form. Furthermore, unless each element or feature is explicitly mentioned, each element or feature can be considered to be selective. Each of the elements or features can be implemented in a form that cannot be combined with other elements or features. In addition, by partially combining elements and / or features together, it is possible to implement the embodiments of the present disclosure. The operation sequence explained for each embodiment of the present disclosure can be modified. Some configurations or features of an embodiment can be included in another embodiment, or can replace the corresponding configuration or features of another embodiment. Furthermore, the embodiments can be configured by combining claims that do not have an explicit reference relationship in the attached claims, or can be included as new claims obtained by amendment after submitting the application.

[0302] Those skilled in the art will understand that the present disclosure can be implemented in other specific ways than those set forth herein without departing from the spirit and essential characteristics of the present disclosure. Therefore, the above embodiments are to be construed in all respects as illustrative and not restrictive. The scope of the present disclosure is to be determined by the appended claims and their legal equivalents, not by the above description, and all changes coming within the meaning and equivalent range of the appended claims are intended to be embraced therein.

[0303] Industrial Applicability

[0304] The present disclosure is applicable to UE, BS or other devices in a wireless mobile communication system.

Claims

1. A method for transmitting a sounding reference signal (SRS) by a user equipment (UE) in a wireless communication system, the method comprising: receiving configuration information for linking a plurality of SRS resource sets on a plurality of component carriers (CCs) with each other for SRS bandwidth aggregation; receiving downlink control information (DCI) triggering aperiodic SRS transmission on a first SRS resource set; as well as performing the aperiodic SRS transmission, The first SRS resource set based on which the non-periodic SRS transmission is triggered is one of the multiple SRS resource sets linked by the configuration information, and the non-periodic SRS transmission is performed on all CCs in the multiple CCs in which the multiple SRS resource sets are configured.

2. The method according to claim 1, wherein Based on the first SRS resource set being configured in a first CC among the multiple CCs and the second SRS resource set linked to the first SRS resource set being configured in a second CC among the multiple CCs, the non-periodic SRS transmission is performed by aggregating the SRS bandwidth on the first SRS resource set on the first CC and the second SRS resource set on the second CC.

3. The method according to claim 1, wherein The UE maintains phase continuity of the aperiodic SRS transmission performed on the multiple SRS resource sets linked for the SRS bandwidth aggregation.

4. The method according to claim 1, wherein Linking the multiple SRS resource sets for the SRS bandwidth aggregation is related to the positioning of the UE.

5. The method according to claim 1, wherein The configuration information for linking the plurality of SRS resource sets is received through radio resource control (RRC) signaling.

6. The method according to claim 1, wherein The multiple SRS resource sets linked for the SRS bandwidth aggregation have the same comb type, the same SRS symbol length, and the same SRS symbol position.

7. The method according to claim 1, wherein The UE does not assume that SRS resource sets configured to be different in at least one of comb type, SRS symbol length, or SRS symbol position are linked to each other for the SRS bandwidth aggregation.

8. The method according to claim 1, wherein The same power parameter is configured for the multiple SRS resource sets linked for the SRS bandwidth aggregation. 9 . A processor-readable recording medium having recorded thereon a program for executing the method according to claim 1 .

10. A device for wireless communication, the device comprising: a memory configured to store instructions; as well as a processor configured to perform operations by executing the instructions, The operation of the processor includes: receiving configuration information for linking a plurality of sounding reference signal (SRS) resource sets on a plurality of component carriers (CCs) with each other for SRS bandwidth aggregation; receiving downlink control information (DCI) triggering aperiodic SRS transmission on a first SRS resource set; and performing the aperiodic SRS transmission, and The first SRS resource set based on which the non-periodic SRS transmission is triggered is one of the multiple SRS resource sets linked by the configuration information, and the non-periodic SRS transmission is performed on all CCs in the multiple CCs in which the multiple SRS resource sets are configured.

11. The apparatus according to claim 10, further comprising: transceiver, The device is a user equipment (UE) operating in a wireless communication system.

12. The apparatus according to claim 10, wherein The apparatus is a processing device configured to control a user equipment (UE) to operate in a wireless communication system.

13. A method for receiving a sounding reference signal (SRS) by a base station (BS) in a wireless communication system, the method comprising: Sending configuration information to a user equipment (UE) for linking a plurality of SRS resource sets on a plurality of component carriers (CCs) to each other for SRS bandwidth aggregation; Sending downlink control information (DCI) to the UE triggering aperiodic SRS transmission on a first SRS resource set; as well as receiving an aperiodic SRS from the UE, The first SRS resource set based on which the aperiodic SRS transmission is triggered is one of the multiple SRS resource sets linked by the configuration information, and the aperiodic SRS is received on all CCs in the multiple CCs in which the multiple SRS resource sets are configured.

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

15. A base station (BS) for wireless communication, the BS comprising: a memory, the memory being configured to store instructions; as well as a processor configured to perform operations by executing instructions, The operation of the processor includes: transmitting, to a user equipment (UE), configuration information for linking a plurality of sounding reference signal (SRS) resource sets on a plurality of component carriers (CCs) with each other for SRS bandwidth aggregation; sending downlink control information (DCI) to the UE triggering aperiodic SRS transmission on a first SRS resource set; and receiving an aperiodic SRS from the UE, The first SRS resource set based on which the aperiodic SRS transmission is triggered is one of the multiple SRS resource sets linked by the configuration information, and the aperiodic SRS is received on all CCs in the multiple CCs in which the multiple SRS resource sets are configured.

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