Method and apparatus for transmitting and receiving radio signals in a radio communication system

Abstract

According to at least one embodiment disclosed in the present specification, a method for transmitting a sounding reference signal (SRS) by a terminal in a wireless communication system 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) for triggering aperiodic SRS transmission on a first SRS resource set; and performing the aperiodic SRS transmission, wherein the aperiodic SRS transmission can be performed on all of the multiple CCs to which the multiple SRS resource sets are configured based on the fact that the first SRS resource set for which the aperiodic SRS transmission is triggered is one of the multiple SRS resource sets linked to each other through the configuration information.

Description

[Technical Field]

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

[0002] Wireless communication systems have been widely deployed to provide various communication services such as voice and data. Generally, wireless communication systems are multiple access systems that support communication with multiple users by sharing available system resources (e.g., bandwidth, transmission power, etc.). Examples of multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, and single carrier frequency division multiple access (SC-FDMA) systems. Summary of the Invention [Problem to be solved by the invention]

[0003] The technical problem to be solved by the present invention is to provide a method and apparatus for transmitting or receiving signals more accurately and efficiently in a wireless communication system.

[0004] The technical objectives to be achieved by the present invention are not limited to the above-mentioned technical objectives, and other technical objectives can be inferred from the following examples. [Means for solving the problem]

[0005] In one aspect of a wireless communication system, a method for a terminal to transmit a sounding reference signal (SRS) includes receiving configuration information that links multiple SRS resource sets on multiple component carriers (CCs) for SRS bandwidth aggregation; receiving downlink control information (DCI) that triggers aperiodic SRS transmission on a first SRS resource set; and performing the aperiodic SRS transmission, wherein the aperiodic SRS transmission can be performed on all of the multiple CCs on which the multiple SRS resource sets are configured 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 that are linked together through the configuration information.

[0006] The first SRS resource set is configured on a first CC among the plurality of CCs, and the second SRS resource set associated with the first SRS resource set is configured on a second CC among the plurality of CCs. Based on this, the aperiodic SRS transmission can be performed through the SRS bandwidth aggregation in the first SRS resource set on the first CC and the second SRS resource set on the second CC.

[0007] The terminal can maintain phase continuity for the aperiodic SRS transmissions performed on the multiple SRS resource sets that are mutually linked for the SRS bandwidth aggregation.

[0008] The plurality of SRS resource sets linked to each other for the SRS bandwidth aggregation may be related to positioning of the terminal.

[0009] The configuration information for linking the plurality of SRS resource sets with each other may be received through radio resource control (RRC) signaling.

[0010] The plurality of SRS resource sets linked to each other for the SRS bandwidth aggregation may have the same comb type, the same SRS symbol length, and the same SRS symbol position.

[0011] The terminal may not assume that SRS resource sets configured to have at least one of different comb types, SRS symbol lengths, and SRS symbol positions are mutually linked for the SRS bandwidth aggregation.

[0012] The same power parameters may be configured for the multiple SRS resource sets that are linked together for the SRS bandwidth aggregation.

[0013] According to another aspect, a processor-readable recording medium having a program for executing the above-described SRS transmission method recorded thereon may be provided.

[0014] According to another aspect, a device for wireless communication includes a memory that stores instructions; and a processor that operates by executing the instructions, wherein the operations of the processor include receiving configuration information that links multiple SRS resource sets on multiple component carriers (CCs) for SRS bandwidth aggregation; receiving downlink control information (DCI) that triggers aperiodic SRS transmission on a first SRS resource set; and performing the aperiodic SRS transmission, wherein the aperiodic SRS transmission can be performed on all of the CCs on which the multiple SRS resource sets are configured 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 that are linked together through the configuration information.

[0015] The device may further include a transceiver.

[0016] The device may be a terminal operating in a wireless communication system.

[0017] The device may be a processing device configured to control a terminal operating in a wireless communication system.

[0018] In another aspect of the wireless communication system, a method for a base station receiving a sounding reference signal (SRS) includes transmitting configuration information for linking multiple SRS resource sets on multiple component carriers (CCs) to a terminal for SRS bandwidth aggregation; transmitting downlink control information (DCI) to the terminal for triggering aperiodic SRS transmission for a first SRS resource set; and receiving the aperiodic SRS from the terminal, wherein the aperiodic SRS can be received on all of the multiple CCs on which the multiple SRS resource sets are configured based on the fact that the first SRS resource set for which the aperiodic SRS transmission is triggered is one of the multiple SRS resource sets linked to each other through the configuration information.

[0019] According to another aspect, there is provided a processor-readable recording medium having a program recorded thereon for executing the above-described SRS receiving method.

[0020] According to another aspect, a base station for wireless communication includes: a memory that stores instructions; and a processor that operates by executing the instructions, wherein operations of the processor include transmitting, to a terminal, configuration information that links multiple SRS resource sets on multiple component carriers (CCs) for SRS bandwidth aggregation; transmitting, to the terminal, downlink control information (DCI) that triggers aperiodic SRS transmission for a first SRS resource set; and receiving an aperiodic SRS from the terminal, wherein the aperiodic SRS can be received on all of the multiple CCs on which the multiple SRS resource sets are configured based on the fact that the first SRS resource set for which the aperiodic SRS transmission is triggered is one of the multiple SRS resource sets that are linked together through the configuration information. [Effects of the Invention]

[0021] According to an embodiment of the present invention, signals can be transmitted or received more accurately and efficiently in a wireless communication system.

[0022] The effects obtained by the present invention are not limited to those mentioned above, and other effects can be inferred from the following examples. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a diagram illustrating physical channels used in a 3GPP (registered trademark: the same applies hereinafter) system, which is an example of a wireless communication system, and a general signal transmission method using these channels. [Figure 2] FIG. 1 is a diagram illustrating the structure of a radio frame. [Figure 3] FIG. 1 illustrates a resource grid of slots. [Figure 4] FIG. 10 is a diagram showing an example of mapping physical channels within a slot. [Figure 5] FIG. 10 is a diagram illustrating a PDSCH reception and ACK / NACK transmission process. [Figure 6] FIG. 1 illustrates a PUSCH transmission process. [Figure 7] FIG. 10 is a diagram illustrating an example of positioning protocol settings. [Figure 8] FIG. 1 is a diagram illustrating an example of OTDOA. [Figure 9] FIG. 1 is a diagram illustrating an example of Multi RTT. [Figure 10] A diagram showing a procedure for operation of a network node (e.g., an upper node of a terminal, an LMF, etc.) according to one embodiment. [Figure 11] FIG. 10 is a diagram illustrating a procedure for terminal operation to perform positioning measurements. [Figure 12] FIG. 1 illustrates various ISAC environments. [Figure 13] FIG. 1 is a diagram illustrating SRS bandwidth aggregation according to one embodiment. [Figure 14] FIG. 1 is a diagram illustrating semi-persistent SRS transmission in a wireless communication system according to one embodiment. [Figure 15] 1 is a diagram illustrating aperiodic SRS transmission in a wireless communication system according to an embodiment. [Figure 16] FIG. 10 is a diagram showing the flow of an SRS transmission method of a terminal according to an embodiment. [Figure 17] FIG. 10 is a diagram showing the flow of an SRS reception method in a base station according to one embodiment. [Figure 18-21] 1 is a diagram illustrating a communication system 1 and a wireless device applicable to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0024] The following technologies can be used for various wireless access systems, such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), and single carrier frequency division multiple access (SC-FDMA). CDMA can be implemented using radio technologies such as Universal Terrestrial Radio Access (UTRA) and CDMA2000. TDMA can be implemented using radio technologies such as Global System for Mobile communications (GSM), General Packet Radio Service (GPRS), and Enhanced Data Rates for GSM Evolution (EDGE). OFDMA can be implemented using radio technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and Evolved UTRA (E-UTRA). UTRA is part of the Universal Mobile Telecommunications System (UMTS). 3GPP (3rd Generation Partnership Project) LTE (long term evolution) is a part of E-UMTS (Evolved UMTS) that uses E-UTRA, LTE-A (Advanced) is an evolved version of 3GPP LTE, and 3GPP NR (New Radio or New Radio Access Technology) is an evolved version of 3GPP LTE / LTE-A.

[0025] As more communication devices require larger communication capacities, there is an emerging need for improved mobile broadband communication compared to existing RATs (Radio Access Technologies). Massive Machine Type Communications (MTC), which connects multiple devices and objects to provide various services anytime, anywhere, is one of the important issues to consider in next-generation communications. Furthermore, communication system designs that take into account reliability- and latency-sensitive services / terminals are being discussed. Thus, the introduction of next-generation RATs that take into account eMBB (enhanced Mobile Broadband Communication), massive MTC, and URLLC (Ultra-Reliable and Low Latency Communication) is being discussed. In one embodiment of the present invention, for convenience, the relevant technologies are referred to as NR (New radio or New RAT).

[0026] For clarity of explanation, the description will be focused on 3GPP NR, but the technical idea of ​​the present invention is not limited thereto.

[0027] For background, terms, definitions, abbreviations, etc. relevant to this invention, the following documents may be referenced (Incorporated by Reference):

[0028] - 38.211: Physical channels and modulation

[0029] - 38.212: Multiplexing and channel coding

[0030] - 38.213: Physical layer procedures for control

[0031] - 38.214: Physical layer procedures for data

[0032] - 38.215: Physical layer measurements

[0033] - 38.300: NR and NG-RAN Overall Description

[0034] - 38.304: User Equipment (UE) procedures in idle mode and in RRC Inactive state

[0035] - 38.321 Medium Access Control (MAC) protocol specification

[0036] - 38.331: Radio Resource Control (RRC) protocol specification

[0037] - 37.213: Introduction of channel access procedures to unlicensed spectrum for NR-based access

[0038] - 36.355: LTE Positioning Protocol

[0039] - 37.355: LTE Positioning Protocol

[0040] Terms and abbreviations

[0041] - 5GC: 5G Core Network

[0042] - 5GS: 5G System

[0043] - AoA: Angle of Arrival

[0044] - AP: Access Point

[0045] - CID: Cell ID

[0046] - E-CID: Enhanced Cell ID

[0047] - GNSS: Global Navigation Satellite System

[0048] - GPS: Global Positioning System

[0049] - LCS: LoCation Service

[0050] - LMF: Location Management Function

[0051] - LPP: LTE Positioning Protocol

[0052] - MO-LR: Mobile Originated Location Request

[0053] - MT-LR: Mobile Terminated Location Request

[0054] - NRPPa: NR Positioning Protocol A

[0055] - OTDOA: Observed Time Difference Of Arrival

[0056] - PDU: Protocol Data Unit

[0057] - PRS: Positioning Reference Signal

[0058] - RRM: Radio Resource Management

[0059] - RSSI: Received Signal Strength Indicator

[0060] - RSTD: Reference Signal Time Difference

[0061] - ToA: Time of Arrival

[0062] - TP: Transmission Point

[0063] - TRP: Transmission and Reception Point

[0064] - UE: User Equipment

[0065] - SS: Search Space

[0066] - CSS: Common Search Space

[0067] - USS: UE-specific Search Space

[0068] - PDCCH: Physical Downlink Control Channel

[0069] - PDSCH: Physical Downlink Shared Channel;

[0070] - PUCCH: Physical Uplink Control Channel;

[0071] - PUSCH: Physical Uplink Shared Channel;

[0072] - DCI: Downlink Control Information

[0073] - UCI: Uplink Control Information

[0074] - SI: System Information

[0075] - SIB: System Information Block

[0076] - MIB: Master Information Block

[0077] - RRC: Radio Resource Control

[0078] - DRX: Discontinuous Reception

[0079] - RNTI: Radio Network Temporary Identifier

[0080] - CSI: Channel state information

[0081] - PCell: Primary Cell

[0082] - SCell: Secondary Cell

[0083] - PSCell: Primary SCG(Secondary Cell Group) Cell

[0084] - CA: Carrier Aggregation

[0085] - WUS: Wake up Signal

[0086] - TX: Transmitter

[0087] - RX: Receiver

[0088] - RSTD: Reference Signal Time Difference

[0089] - RS: Reference Signal

[0090] - PRS: Positioning Reference Signal

[0091] - SRS: Sounding Reference Signal

[0092] In a wireless communication system, a terminal receives information from a base station via a downlink (DL), and transmits information from the base station via an uplink (UL). The information transmitted and received between the base station and the terminal includes data and various control information, and various physical channels exist depending on the type and purpose of the information transmitted and received.

[0093] FIG. 1 is a diagram illustrating physical channels used in a 3GPP NR system and a typical signal transmission method using these channels.

[0094] When a terminal is powered on from a power-off state or newly enters a cell, it performs an initial cell search, such as establishing synchronization with a base station, in step S101. To this end, the terminal receives a synchronization signal block (SSB) from the base station. The SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH). The terminal establishes synchronization with the base station based on the PSS / SSS and obtains information such as a cell identity. The terminal also obtains broadcast information within the cell based on the PBCH. In addition, during the initial cell search, the terminal can receive a downlink reference signal (DL RS) to check the status of the downlink channel.

[0095] After completing the initial cell search, the terminal receives a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) based on information from the physical downlink control channel in step S102 to obtain more specific system information.

[0096] Thereafter, the terminal performs a random access procedure, such as steps S103 to S106, to complete connection to the base station. To this end, the terminal transmits a preamble over a physical random access channel (PRACH) (S103) and receives a response message to the preamble over a physical downlink control channel and a corresponding physical downlink shared channel (S104). In the case of contention-based random access, the terminal performs a contention resolution procedure, such as transmitting a further physical random access channel (S105) and receiving a physical downlink control channel and a corresponding physical downlink shared channel (S106).

[0097] After performing this procedure, the terminal then receives a physical downlink control channel / physical downlink shared channel (S107) and transmits a physical uplink shared channel (PUSCH) / physical uplink control channel (PUCCH) as a general uplink / downlink signal transmission procedure (S108). The control information transmitted by the terminal to the base station is collectively referred to as uplink control information (UCI). UCI includes HARQ ACK / NACK (Hybrid Automatic Repeat and reQuest Acknowledgement / Negative-ACK), SR (Scheduling Request), CSI (Channel State Information), etc. CSI includes CQI (Channel Quality Indicator), PMI (Precoding Matrix Indicator), RI (Rank Indication), etc. UCI is generally transmitted via PUCCH, but when control information and traffic data need to be transmitted simultaneously, it is transmitted via PUSCH. In addition, UCI can be transmitted aperiodically via PUSCH at the request / instruction of the network.

[0098] Figure 2 illustrates the structure of a radio frame. In NR, uplink and downlink transmissions are organized into frames. A radio frame has a length of 10 ms and is divided into two 5 ms half-frames (HF). Each half-frame is divided into five 1 ms subframes (SF). A subframe is divided into one or more slots, and the number of slots within a subframe depends on the subcarrier spacing (SCS). Each slot contains 12 or 14 orthogonal frequency division multiplexing (OFDM) symbols, depending on the cyclic prefix (CP). If a normal CP is used, each slot contains 14 symbols. If an extended CP is used, each slot contains 12 symbols.

[0099] Table 1 illustrates that when a general CP is used, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe change depending on the SCS.

[0100] [Table 1]

[0101] *N slot symb : Number of symbols in the slot

[0102] *N frame,u slot : Number of slots in the frame

[0103] *N subframe,u slot : Number of slots in a subframe

[0104] Table 2 illustrates how the number of symbols per slot, the number of slots per frame, and the number of slots per subframe change depending on the SCS when an extended CP is used.

[0105] [Table 2]

[0106] The frame structure is illustrative only, and the number of subframes, slots, and symbols in a frame can vary.

[0107] In an NR system, OFDM numerology (e.g., SCS) can be configured to be different among multiple cells merged into one terminal. Accordingly, the (absolute time) duration of time resources (e.g., SF, slot, or TTI) (collectively referred to as TU (Time Unit) for convenience) consisting of the same number of symbols can be configured to be different among the merged cells. Here, the symbols include OFDM symbols (or CP-OFDM symbols) and SC-FDMA symbols (or Discrete Fourier Transform-spread-OFDM, DFT-s-OFDM symbols).

[0108] FIG. 3 illustrates a resource grid of a slot. A slot includes multiple symbols in the time domain. For example, in the case of a general CP, one slot includes 14 symbols, while in the case of an extended CP, one slot includes 12 symbols. A carrier includes multiple subcarriers in the frequency domain. A resource block (RB) is defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. A BWP is defined as multiple consecutive physical RBs (PRBs) in the frequency domain and can correspond to one numerology (e.g., SCS, CP length, etc.). A carrier includes up to N BWPs (e.g., 5 BWPs). Data communication is performed using activated BWPs, and only one BWP can be activated for one UE. Each element in the resource grid is called a resource element (RE), and one complex symbol can be mapped to it.

[0109] FIG. 4 illustrates an example of mapping physical channels within a slot. In an NR system, a frame is characterized by a self-contained structure in which a DL control channel, DL or UL data, and a UL control channel are all included within one slot. For example, the first N symbols in a slot are used to transmit a DL control channel (e.g., PDCCH) (hereinafter referred to as the DL control region), and the last M symbols in the slot are used to transmit a UL control channel (e.g., PUCCH) (hereinafter referred to as the UL control region). N and M are each an integer greater than or equal to 0. The resource region between the DL control region and the UL control region (hereinafter referred to as the data region) is used to transmit DL data (e.g., PDSCH) or UL data (e.g., PUSCH). The GP provides a time gap when the base station and the UE switch from transmission mode to reception mode or from reception mode to transmission mode. Some symbols at the time of switching from DL to UL within a subframe can be set as the GP.

[0110] The PDCCH carries Downlink Control Information (DCI). For example, the PCCCH (i.e., DCI) carries the transmission format and resource allocation of the downlink shared channel (DL-SCH), resource allocation information for the uplink shared channel (UL-SCH), paging information for the Paging Channel (PCH), system information on the DL-SCH, resource allocation information for higher layer control messages such as random access responses transmitted on the PDSCH, transmit power control commands, and activation / deactivation of configured scheduling (CS). The DCI includes a cyclic redundancy check (CRC), which is masked / scrambled with various identifiers (e.g., Radio Network Temporary Identifier, RNTI) depending on the owner or use of the PDCCH. For example, if the PDCCH is for a specific terminal, the CRC is masked with a terminal identifier (e.g., Cell-RNTI, C-RNTI). If the PDCCH is related to paging, the CRC is masked with a Paging-RNTI (P-RNTI). If the PDCCH is related to system information (e.g., System Information Block, SIB), the CRC is masked with a System Information RNTI (SI-RNTI). If the PDCCH is related to a random access response, the CRC is masked with a Random Access RNTI (RA-RNTI).

[0111] FIG. 5 illustrates a process of receiving a PDSCH and transmitting an ACK / NACK. Referring to FIG. 5, a terminal detects a PDCCH in slot #n. Here, the PDCCH includes downlink scheduling information (e.g., DCI format 1_0, 1_1), and indicates a DL assignment-to-PDSCH offset (K0) and a PDSCH-HARQ-ACK reporting offset (K1). After receiving a PDSCH from slot #(n+K0) according to the scheduling information of slot #n, the terminal transmits UCI via a PUCCH in slot #(n1+K1) when reception of the PDSCH ends in slot #n1 (where n+K0≦n1). Here, the UCI includes a HARQ-ACK response to the PDSCH. If the PDSCH is configured to transmit a maximum of one TB, the HARQ-ACK response is configured as 1 bit. When the PDSCH is configured to transmit up to two TBs, the HARQ-ACK response consists of 2 bits if spatial bundling is not configured, and 1 bit if spatial handling is configured. If the HARQ-ACK transmission time for multiple PDSCHs is specified as slot #(n+K1), the UCI transmitted in slot #(n+K1) includes the HARQ-ACK response for multiple PDSCHs.

[0112] 6 is a diagram illustrating a PUSCH transmission process. Referring to FIG. 6, a terminal detects a PDCCH in slot #n. Here, the PDCCH includes uplink scheduling information (e.g., DCI format 0_0, 0_1). The terminal transmits a PUSCH in slot #(n+K2) according to the scheduling information of slot #n. Here, the PUSCH includes an UL-SCH TB.

[0113] Positioning

[0114] Positioning refers to measuring radio signals to determine the geographical location and / or velocity of a UE. Location information is requested by a client (e.g., an application) associated with the UE and reported to the client. Location information may also be included in a core network or requested by a client connected to the core network. Location information may be reported in a standard format, such as cell-based or geographic coordinates, and may also include estimated error values ​​for the UE's location and velocity and / or the positioning method used for positioning.

[0115] FIG. 7 is a diagram illustrating an example of a positioning protocol configuration for determining the location of a terminal.

[0116] 7, the LPP is used as a point-to-point between a location server (E-SMLC and / or SLP and / or LMF) and a target device (UE and / or SET) to position the target device (UE and / or SET) using position-related measurements obtained from one or more reference sources. Via the LPP, the target device and the location server exchange measurement and / or location information based on Signal A and / or Signal B.

[0117] The NRPPa is used for information exchange between the reference source (ACCESS NODE and / or BS and / or TP and / or NG-RAN node) and the location server.

[0118] The functions provided by the NRPPa protocol include:

[0119] - E-CID Location Information Transfer: This function exchanges location information between the reference source and the LMF for the purpose of E-CID positioning.

[0120] - OTDOA Information Transfer: This function exchanges information between the reference source and the LMF for the purpose of OTDOA positioning.

[0121] - Reporting of General Error Situations: This function reports general error situations for which no error message is defined for each function.

[0122] Positioning methods supported by NG-RAN include Global Navigation Satellite System (GNSS), OTDOA, enhanced cell ID (E-CID), barometric sensor positioning, WLAN positioning, Bluetooth positioning, terrestrial beacon system (TBS), and Uplink Time Difference of Arrival (UTDOA), etc. The location of a UE can be measured using any one of the positioning methods, or two or more of the positioning methods.

[0123] OTDOA(Observed Time Difference Of Arrival)

[0124] FIG. 8 is a diagram illustrating an example of an OTDOA (observed time difference of arrival) positioning method.

[0125] The OTDOA positioning method uses the measured timing of downlink signals received by a UE from multiple TPs, including eNBs, ng-eNBs, and TPs dedicated to PRSs. The UE measures the timing of the received downlink signals using location assistance data received from a location server. The UE then determines its location based on these measurements and the geographic coordinates of neighboring TPs.

[0126] A UE connected to a gNB can request a measurement gap for OTDOA measurement from a TP. If the UE cannot recognize the SFN for at least one TP in the OTDOA assistance data, the UE uses an autonomous gap to acquire the SFN of the OTDOA reference cell before requesting a measurement gap for performing Reference Signal Time Difference (RSTD) measurement.

[0127] Here, RSTD is defined based on the minimum relative time difference between the boundaries of two subframes received from the reference cell and the measurement cell, i.e., the relative time difference between the start time of the subframe of the reference cell that is closest to the start time of the subframe received from the measurement cell. Meanwhile, the reference cell is selected by the UE.

[0128] Accurate OTA measurements require measuring the time of arrival (TOA) of signals received from three or more geographically dispersed TPs or base stations. For example, the TOA for each of TP1, TP2, and TP3 can be measured, and the RSTD for TP1-TP2, RSTD for TP2-TP3, and RSTD for TP3-TP1 can be calculated based on the three TOAs. Based on this, a geometric hyperbola can be determined, and the intersection of these hyperbolae can be used to estimate the UE location. In this case, there may be accuracy and / or uncertainty for each TOA measurement, and the estimated UE location may be known within a predetermined range due to the measurement uncertainty.

[0129] For example, the RSTD for two TPs is calculated based on Equation 1.

[0130]

number

[0131] where c is the speed of light, {xt,yt} are the (unknown) coordinates of the target UE, {xi,yi} are the coordinates of the (known) TP, and {x1,y1} are the coordinates of the reference TP (or other TP), where (Ti-T1) is the transmission time offset between two TPs, called "Real Time Differences" (RTDs), and ni, n1 denote values ​​related to the UE TOA measurement errors.

[0132] E-CID (Enhanced Cell ID)

[0133] In the Cell ID (CID) positioning method, the location of the UE can be determined by geographic information of the UE's serving ng-eNB, serving gNB, and / or serving cell, for example, obtained by paging, registration, etc.

[0134] On the other hand, the E-CID positioning method can use, in addition to the CID positioning method, additional UE measurements and / or NG-RAN radio resources to improve UE location estimates. The E-CID positioning method can use some measurement methods similar to the measurement control system of the RRC protocol, but generally does not perform additional measurements solely for UE location measurement. In other words, no separate measurement configuration or measurement control message needs to be provided to measure the UE location, and the UE does not expect that additional measurement operations solely for location measurement will be requested, and can report measurements obtained by measurement methods that the UE can generally measure.

[0135] For example, the serving gNB implements the E-CID positioning method using E-UTRA measurement values ​​provided by the UE.

[0136] Below, examples of measurement elements that can be used for E-CID positioning are described.

[0137] - UE measurements: E-UTRA RSRP (Reference Signal Received Power), E-UTRA RSRQ (Reference Signal Received Quality), UE E-UTRA Rx-Tx Time Difference, GERAN / WLAN RSSI (Reference Signal Strength Indication), UTRAN CPICH (Common Pilot Channel) RSCP (Received Signal Code Power), UTRAN CPICH Ec / Io

[0138] - E-UTRAN measurements: ng-eNB Rx-Tx Time Difference, Timing Advance (TADV), Angle of Arrival (AoA)

[0139] Here, TADV is divided into Type 1 and Type 2 as follows.

[0140] TADV Type 1 = (ng-eNB receive-transmit time difference) + (UE E-UTRA receive-transmit time difference)

[0141] TADV Type 2 = ng-eNB receive-transmit time difference

[0142] Meanwhile, AoA is used to measure the direction of a UE. AoA is defined as the estimated angle to the UE's position counterclockwise from the base station / TP. Here, the geographic reference direction is north. The base station / TP can use uplink signals such as Sounding Reference Signal (SRS) and / or Demodulation Reference Signal (DMRS) for AoA measurement. In addition, the larger the antenna array, the higher the accuracy of AoA measurement. When antenna arrays are arranged at the same intervals, signals received at adjacent antenna elements have a certain phase change (phase rotation).

[0143] UTDOA(Uplink Time Difference of Arrival)

[0144] UTDOA is a method for estimating the arrival time of an SRS to determine the location of a UE. When calculating the estimated SRS arrival time, the serving cell is used as a reference cell, and the UE's location can be estimated based on the difference in arrival time from other cells (or base stations / TPs). To implement UTDOA, the E-SMLC instructs the target UE's serving cell to instruct the target UE to transmit an SRS. The E-SMLC also provides configurations such as periodic / aperiodic SRS, bandwidth, and frequency / group / sequence hopping.

[0145] Multi RTT (round trip time)

[0146] FIG. 9 is a diagram illustrating an example of a Multi RTT (round trip time) positioning method.

[0147] 9(a) illustrates an 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). For example, the initiating device may be a TRP and / or a terminal, and the responding device may be a terminal and / or a TRP.

[0148] The initiator sends an RTT measurement request, and the responder receives it (1301).

[0149] The initiator sends an RTT measurement signal at t0 and the responder takes a TOA measurement t1 (1303).

[0150] The responder sends an RTT measurement signal at t2 and the initiator takes a TOA measurement at t3 (1305).

[0151] The responding device transmits information about [t2-t1], and the initiating device receives the information and calculates the RTT based on Equation 2 (1307). The information may be transmitted and received based on a separate signal, or may be transmitted and received as part of the RTT measurement signal (1305).

[0152]

number

[0153] Referring to Figure 9(b), this RTT corresponds to a double-range measurement between two devices. Positioning estimation is performed from this information. Based on the measured RTT, d1, d2, and d3 are determined, and the target device location is determined by the intersection of circles with radii d1, d2, and d3 centered at each BS1, BS2, and BS3 (or TRP).

[0154] NG-RAN positioning architecture and procedures

[0155] 10 is a diagram illustrating a positioning structure of a next generation (NG) radio access network (RAN). The NR RAN is also referred to as an NR RAN or a 5G RAN.

[0156] The AMF receives a request for some location services related to a specific target UE from another entity (e.g., GMLC or UE), or decides to initiate some location services on behalf of a specific target UE (e.g., in the case of an IMS emergency call). The AMF then sends a location service request to the LMF. The LMF can process the location service request, which includes sending assistance data to the target UE and / or positioning the target UE for UE-based and / or UE-assisted positioning. The LMF sends the location service result (e.g., a location estimate for the UE) to the AMF. In the case of a location service requested by another entity other than the AMF (e.g., GMLC or UE), the AMF sends the location service result to the relevant entity.

[0157] The NG-RAN node can control TRP / TP such as RRM or DL-PRS only TP for PRS-based TBS support.

[0158] The LMF can connect to the E-SMLC to access UTRAN information.

[0159] The LMF interfaces with the SLP, which is responsible for positioning relative to the user plane.

[0160] FIG. 11 illustrates an example of location services supported by NG-RAN.

[0161] When the UE is in the CM-IDLE state, when the AMF receives a Location Service Request, the AMF performs a network-triggered service request to establish signaling for connection with the UE and allocation of a specific serving gNB / ng-eNB. In Figure 11, it is assumed that the UE is in a connected mode.

[0162] A location service request for the UE is triggered, and the location service request for the UE is any one of 1101, 1102, or 1103. For example, a 5GC entity (e.g., GMLC) requests some location services (e.g., positioning) for the target UE from the serving AMF (1101), the serving AMF triggers some location services for the target UE (e.g., to locate the UE for an emergency call) itself (1102), or the UE requests some location services (e.g., positioning or assistance data transmission) from the serving AMF at the NAS level (1103).

[0163] The AMF transmits the location service request to the LMF (1104).

[0164] The LMF initiates a positioning procedure with a nearby ng-eNB / gNB providing services in the NG-RAN to obtain position measurement or assistance data (1105).

[0165] (Alternatively or additionally to step 1105) the LMF initiates a positioning procedure with the UE to obtain a position estimate or positioning measurements or to transmit position assistance data to the UE (1106).

[0166] The LMF provides a location service response to the AMF (1107) (e.g., an indication of success or failure, a location estimate for the UE if requested and obtained).

[0167] (In case 1101) The AMF provides a location service response to the 5GC entity (1108) (e.g., location estimation for the UE).

[0168] (In case 1102), the AMF uses the location service response received in step 1107 to assist (1109) the service that triggered it in step 1102 (e.g., providing the GMLC with a location estimate related to an emergency call).

[0169] (In the case of 1103) the AMF provides a location service response to the UE (1110) (e.g., a location estimate for the UE).

[0170] SRS (sounding reference signal) for positioning

[0171] In a Rel. 15 NR system, periodic, aperiodic, and semi-persistent Rel. 15 SRS can be transmitted by base stations to measure UL-Relative Time of Arrival (RTOA), UL SRS-RSRP, and UL-Angle of Arrival (AOA), thereby supporting UL TDOA and UL AOA.

[0172] In the Rel.16 / 17 NR system, periodic, aperiodic, and semi-persistent SRS for positioning can be transmitted by the base station for measurement of UL RTOA, UL SRS-RSRP, UL-AOA, and gNB Rx-Tx time difference, thereby supporting UL TDOA, UL AOA, and multi-RTT.

[0173] To avoid confusion between Rel.15 SRS and SRS for positioning, SRS for positioning will be referred to as "SRS-p." In the newly proposed solutions below, SRS can be interpreted as meaning SRS-p unless otherwise specified.

[0174] For an SRS, when the upper layer parameter SRS-PosResource is set (i.e., SRS-p) and the upper layer parameter SpatialRelationInfoPos is set, the ID of the configuration field of the reference RS is provided. The reference RS may be the SRS, CSI-RS, SS / PBCH block, or DL ​​PRS configured for the serving cell or SS / PBCH block set by the upper layer parameter SRS-Resource or SRS-PosResource.

[0175] A UE is not expected to transmit multiple SRS resources with different spatial relationships to each other in the same OFDM symbol.

[0176] If the upper layer parameter SpatialRelationInfoPos is not set, the terminal may use a fixed spatial domain transmit filter or another spatial domain transmit filter for transmitting SRS-p set by the upper layer parameter SRS-PosResource across multiple SRS resources.

[0177] In RRC_CONNECTED mode, the terminal transmits the SRS-p set by the upper layer parameter SRS-PosResource within the active UL BWP.

[0178] Only one RS source is provided for the upper layer parameter SpatialRelationInfoPos provided for each SRS-p resource.

[0179] In the case of same-carrier operation, if an SRS-p collides with a scheduled PUSCH, the SRS-p is dropped in the colliding symbol.

[0180] The terminal does not expect SRS-PosResource to be configured for a carrier of a serving cell having a slot format configured with DL / UL symbols that are not configured for PUSCH / PUCCH transmission.

[0181] Depending on the UE's capability, SRS-p resources associated with the initial UL BWP can be configured, and the SRS-p resources are transmitted within the initial UL BWP during RRC_INACTIVE mode with the same CP and subcarrier spacing as those configured for the initial UL BWP. Depending on the UE's capability, SRS-p resources for positioning can be configured outside the initial BWP in RRC_INACTIVE mode, and the frequency location and bandwidth, subcarrier spacing, and CP length for SRS-p transmission can be configured. The SRS-p resources configured outside the initial UL BWP in RRC_INACTIVE mode are configured to the same band and CC as the initial UL BWP.

[0182] ISAC(Integrated Sensing And Communication)

[0183] In recent wireless communication systems, various methods for utilizing wireless sensing have been discussed. While conventional radar technology has been considered for wireless sensing, it is limited in that radar technology is specialized for sensing and does not take communication characteristics into consideration, and transmitter / receiver nodes require separate devices to transmit and receive signals for wireless sensing. To address these issues, methods for utilizing wireless sensing in wireless communication systems that support communication using cellular networks, such as 5G and / or next-generation 6G (e.g., ISAC or JCAS (Joint Communication and Sensing)), have been actively researched in recent years.

[0184] 3GPP standardization has begun research to support ISACs for 5G / 6G. In TR 22.837, published by the 3GPP SA1 WG, wireless sensing is defined as a technology for acquiring information about environmental characteristics and / or surrounding objects, using radio waves to measure distance, angle, or instantaneous velocity. This document considers scenarios in which sensing and communication share the same frequency band and hardware. Sensing radio waves can be shared / reused with communication radio waves (e.g., using reference signals for communication (e.g., SSB, DMRS, CSI-RS, and / or SRS)), or radio waves can be separately designed for wireless sensing.

[0185] Generally, wireless sensing supported by ISAC can be considered to be performed through a process in which a signal transmitted from a transmitting end is reflected by a target object and received by a receiving end, and sensing modes for different scenarios can be defined depending on the relationship between the transmitting end and the receiving end. Based on whether the transmitting end and the receiving end are the same or not, a case in which the transmitting end and the receiving end are the same can be defined as a mono-static sensing mode, and a case in which the transmitting end and the receiving end are different can be defined as a bi-static sensing mode.

[0186] FIG. 12 is a diagram illustrating an example of a wireless sensing mode supported in the ISAC.

[0187] Referring to FIG. 12, when considering the transmission and reception operations in the 3GPP standard and the nodes participating therein, the sensing modes can be broadly divided as follows:

[0188] (a) BS mono-static sensing mode: The BS transmits radio waves and receives the reflected signals.

[0189] (b) BS-to-BS bi-static sensing mode: A specific BS receives a signal reflected from another BS.

[0190] (c) BS-to-UE bi-static sensing mode: The UE receives the reflected signal of the radio wave transmitted by the BS.

[0191] (d) BS mono-static sensing mode: The UE that transmitted the radio wave receives the reflected signal.

[0192] (e) UE-to-UE bi-static sensing mode: A signal reflected from a radio wave transmitted by a specific transmitting UE is received by another UE.

[0193] (f) UE-to-BS bi-static sensing mode: The BS receives the reflected signal of the radio wave transmitted by the transmitting UE.

[0194] However, in addition to the six use cases mentioned above, a sensing mode that includes multiple transmitting / receiving nodes may be referred to by the term multi-static sensing mode.

[0195] ISAC / JCAS wireless sensing is being considered for application to a variety of scenarios. Generally, wireless sensing aims to obtain information about targets that do not have a communication module (or are unrelated to a communication module). Possible scenarios can be broadly divided into the following three categories:

[0196] (1) Object detection and tracking: This is a scenario in which target objects or people are detected and their location information is tracked. Typical examples include intruder detection in indoor / outdoor environments, UAV or AGV location tracking, and autonomous driving support scenarios.

[0197] (2) Environment monitoring: This is a scenario aimed at collecting information about the surrounding environment of the transmitting / receiving node. Typical examples include observing rainfall information and detecting floods.

[0198] (3) Motion monitoring: This is a scenario in which the motion of a target is detected. A typical example would be a scenario for identifying human motions and gestures.

[0199] The performance indicators and their levels required for each of the above scenarios are diverse and may differ from one another. To design an ISAC / JCAS that is appropriate for the service quality required for each scenario, various key performance requirements must be considered. The 3GPP standard TS 22.137 document defines the key performance requirements for each service scenario, including positioning accuracy, velocity estimation accuracy, confidence level, sensing resolution, missed detection probability, false alarm probability, maximum sensing service delay, and refreshing rate. The required level for each key performance requirement may differ depending on the service scenario.

[0200] SRS BW aggregation for positioning

[0201] Hereinafter, the operation of a base station and a terminal for applying BW aggregation technology to the transmission and reception of SRS for positioning (SRS-p), and a related signaling method will be proposed.

[0202] The following proposals for SRS-p bandwidth (BW) aggregation are also applicable to the ISAC environment mentioned above.

[0203] In NR, the introduction of BW aggregation is being discussed in Rel-18 as a method to improve positioning accuracy. BW aggregation is a technique for expanding the size of the total BW in which RSs used for positioning are transmitted by stacking RSs transmitted on one or more carriers. To apply BW aggregation, conditions such as phase continuity must be met between each transmitted RS. Based on this, Rel-18 only considers cases where the conditions for transmitting and receiving RSs using the same antenna are met in situations of intra-band contiguous carriers.

[0204] For example, to satisfy the phase continuity condition, RS(s) subject to BW aggregation must be transmitted and received via a single RF chain. For example, for DL ​​RSs, a terminal can aggregate positioning frequency layers (PFLs), and all PFLs must be transmitted via a single transmit chain and reference point of the same antenna in the TRP. For UL RSs, a TRP can aggregate PFLs, and all PFLs must be transmitted via a single transmit chain and reference point of the same antenna in the terminal.

[0205] Although this specification describes the BW aggregation method for SRS-p based on UL positioning of 3GPP NR, the proposed method is not limited to this and can be generally applied to BW aggregation situations for other UL or DL ​​signals. Furthermore, although the proposed method assumes an intra-band contiguous carrier situation, it is not limited to this and can be applied to BW aggregation situations where other transmission and reception assumptions are applied. Furthermore, the proposed method is not limited to 3GPP NR systems, but can also be generally applied when BW aggregation operations for RSs such as SRS-p or similar operations are performed in general communication systems such as LTE and 6G. The proposed method is applicable to all types of transmission and reception schemes and positioning schemes expected by base stations and terminals.

[0206] The methods proposed in this specification may be implemented in an independent form without being particularly combined, or may be implemented in a linked form by combining one or more methods. Some terms, symbols, sequences, etc. used may be replaced with other terms, symbols, sequences, etc.

[0207] The operation of a terminal and a base station for supporting BW aggregation applied to SRS-p transmitted and received via the same antenna under the condition of intra-band contiguous carriers and a signaling method for supporting the same will be described. The condition of intra-band contiguous carriers may mean that SRS-p BW aggregation is applied to contiguous (at least a part / all) carriers among multiple carriers included in one band.

[0208] To support SRS-p BW aggregation, the base station and the terminal need to share information on whether BW aggregation is applied to the SRS-p being transmitted and received. To this end, the base station can be configured to provide the terminal with information on SRS-p resource pairs to which BW aggregation is to be applied. The information on the SRS-p resource pairs can be configured as a set of SRS-p transmitted on two or more different carriers. When an SRS-p designated as an SRS-p resource pair is transmitted while satisfying certain conditions, the terminal can be configured to apply BW aggregation to the SRS-p transmission. The SRS-p BW aggregation operation can refer to an operation that satisfies certain conditions, such as ensuring phase continuity of the SRS-p, applying the same timing advance (TA), and / or using the same power level (e.g., the same SRS power parameter setting). Therefore, the base station can provide the terminal with configuration information of the SRS-p resource pair using higher layer signaling such as SIB or RRC, and the base station can then determine whether BW aggregation is applied to the SRS-p transmitted by the terminal based on the configured / instructed information and reflect this in measurements. The terminal can receive the information and be configured to perform BW aggregation for the transmission of the SRS-p configured / instructed as the SRS-p resource pair.

[0209] A specific method for setting up an SRS-p resource pair may follow at least part of the following.

[0210] As an example, an SRS-p resource pair is configured in units of an SRS-p resource or an SRS-p resource set. For example, SRS-p resources or SRS-p resource sets of different carriers may be defined as an SRS-p resource pair. More specifically, each SRS-p resource or SRS-p resource set includes ID information for providing information about the SRS-p resource pair, and SRS-p resources or SRS-p resource sets of different carriers having the same ID information may be defined as an SRS-p resource pair. Configuring an SRS-p resource pair in units of an SRS-p resource or an SRS-p resource set is advantageous in terms of flexibility in base station configuration.

[0211] As an example, an SRS-p resource pair is configured on a BWP or carrier basis. For example, an SRS-p resource pair can be configured for BWPs belonging to different carriers or different carriers. More specifically, configuration information for each BWP or carrier includes ID information for instructing the configuration of an SRS-p resource pair, and a UE can expect BWPs belonging to different carriers but having the same ID to be assumed as an SRS-p resource pair. Configuring an SRS-p resource pair on a BWP or carrier basis is advantageous in reducing signaling overhead for SRS-p resource pair configuration and configuring multiple SRS resource sets as SRS-p resource pairs with a single signaling.

[0212] As an additional condition, the terminal may determine / configure to perform BW aggregation on SRS-p resources (sets) belonging to a BWP or carrier configured as an SRS-p resource pair only if a specific condition is met. For example, the specific condition may be that BW aggregation is performed only if the SRS-p resources (sets) have the same comb type, the same symbol length, and / or the same location; otherwise, neither the base station nor the terminal performs BW aggregation using the SRS-p resource pair. Therefore, the terminal expects that the SRS-p resources (sets) belonging to the SRS-p resource pair have the same comb type, the same symbol length (e.g., number of symbols, SCS), and / or the same location (e.g., periodicity and offset, start symbol) configured. In other words, the terminal may assume that only SRS-p resources (sets) having the same comb type, the same symbol length (e.g., number of symbols, SCS) and / or the same position (e.g., periodicity and offset, start symbol) are SRS-p resource pairs for BW aggregation, and may not assume any other SRS-p resource pairs for BW aggregation.

[0213] A terminal that receives the configuration information regarding the SRS-p resource pair can perform transmission for the SRS-p resource pair (e.g., SRS transmission on the SRS-p resource set belonging to the SRS-p resource pair). In the case of conventional semi-persistent and aperiodic transmission for the SRS-p resource (set), transmission for each SRS-p resource (set) can be performed for each BWP (i.e., BWP of each CC). Similarly, when an SRS-p resource pair is used, an SRS-p with BW aggregation can be configured to be transmitted if an independent activation / triggering indication for the SRS-p resource (set) occurs in each BWP ( / each CC) and the transmission times coincide. This is advantageous in obtaining the gain of BW aggregation for the SRS-p resource pair when the simultaneous transmission condition is met while maintaining the independent indication scheme for each SRS-p resource (set). On the other hand, the activation indication may be a command of the MAC CE to activate semi-persistent transmission, and the triggering indication may refer to a DCI field for aperiodic SRS transmission (e.g., information on a DL / UL grant DCI indicating an SRS resource set and requesting transmission of aperiodic SRS).

[0214] For example, if one of the SRS-p resources (sets) configured as an SRS-p resource pair in a specific BWP / CC is activated / triggered in a semi-persistent or aperiodic manner, the UE may transmit all SRS-p resources (sets) related to the SRS-p resource pair. For example, referring to FIG. 13, an SRS resource set configuration may be provided for each UL BWP of each CC, and each SRS resource set may include multiple SRS resources. The SRS resource set configuration may include information that the SRS resource set is for positioning and information indicating whether the SRS resource set is aperiodic, periodic, or semi-persistent. Meanwhile, 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 is configured across CCs. 13 includes 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. For convenience of explanation, it is assumed that the SRS resource sets included in the list satisfy conditions for BW aggregation (e.g., comb size, symbol length, symbol position, etc.).As an example, assuming that the semi-persistent type is configured, when i) a MAC CE for SRS activation is received for SRS resource set #1 of CC#1 UL BWP#a, the terminal activates not only i) SRS resource set #1 of CC#1 UL BWP#a, but also ii) SRS resource set #2 of CC#2 UL BWP#d and iii) SRS resource set #k of CC#3 UL BWP#e, and transmits a BW aggregated SRS-p while maintaining phase continuity across i) SRS resource set #1 of CC#1 UL BWP#a, ii) SRS resource set #2 of CC#2 UL BWP#d, and iii) SRS resource set #k of CC#3 UL BWP#e. As an example, assuming that the aperiodic type is configured, when i) a DL / UL grant DCI requesting SRS transmission to SRS resource set #1 of CC#1 UL BWP#a is received, the terminal transmits BW aggregated SRS-p while maintaining phase continuity not only across i) SRS resource set #1 of CC#1 UL BWP#a, but also across ii) SRS resource set #2 of CC#2 UL BWP#d, and iii) SRS resource set #k of CC#3 UL BWP#e.

[0215] Similarly, when deactivation is instructed for a semi-persistent SRS-p, the terminal can be configured to stop transmission of the SRS-p resource (set) instructed to be stopped and all semi-persistent SRS-p resource pairs that have an SRS-p resource pair relationship with it.

[0216] In this way, the terminal performs BW aggregation operation for the SRS-p resource pair. The proposed method has an advantage that, when simultaneous transmission for the SRS-p resources (set) belonging to the SRS-p resource pair is required to obtain a BW aggregation gain, the signaling overhead for conveying such an indication can be reduced.

[0217] As an example, the MAC CE or DCI that activates / triggers the SRS-p resource pair may include information indicating whether or not simultaneous transmission is to be performed for the SRS-p resource pair, and the simultaneous scheduling may be configured to be applied only when a separate instruction is issued.

[0218] BW aggregation is an advantageous technique for improving positioning accuracy. However, the base station and the terminal are required to perform additional operations to transmit and receive RSs to which BW aggregation is applied, which may reduce the transmission and reception efficiency of other signals / channels. To address this drawback, the base station can be configured to provide the terminal with configuration information for the SRS-p resource pair in advance and to separately provide instruction information for actually applying BW aggregation to the SRS-p resource pair. If the terminal receives a BW aggregation activation instruction for the SRS-p resource pair via the MAC CE, the terminal can perform BW aggregation on the SRS-p resources to be transmitted subsequently when the conditions for the SRS-p resource pair are satisfied. However, if the terminal does not receive an activation instruction for the SRS-p resource pair or receives a deactivation instruction via the MAC CE, the terminal can be configured not to perform BW aggregation on the SRS-p resource pair.

[0219] Alternatively, if an instruction for BW aggregation for an SRS-p resource pair is triggered through a DCI, the UE may be configured to perform BW aggregation for the aperiodic SRS-p resource pair indicated by the same DCI. If a DCI is received that does not include an instruction for triggering BW aggregation for the SRS-p resource pair, the UE is not forced to apply BW aggregation to the transmission of the SRS-p resource pair.

[0220] Alternatively, when a BW aggregation instruction for an SRS-p resource pair is triggered through a DCI, the UE may be configured to perform BW aggregation for the SRS-p resource pair transmitted within a time point or interval associated with the DCI. In this case, the SRS-p resource pair transmitted within the time point or interval may include other time points or SRS-p resource pairs not scheduled by the DCI.

[0221] In the above description, 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 used to avoid confusion with the SRS resource "set," which is an RRC information element (IE) defined in the existing NR standard, and is not to be interpreted as being limited to N=2. In other words, N may be 2, but is not limited thereto, and N may be set to 3 or more. The term "SRS-p resource pair" may also be expressed as other terms, such as a BW aggregation SRS-p resource list / group.

[0222] FIG. 14 is a diagram illustrating semi-persistent SRS transmission in a wireless communication system according to an embodiment.

[0223] Referring to Figure 14, the terminal receives configuration information related to SRS-p for positioning from the network (A05). The configuration information related to SRS-p can be received through RRC signaling. The configuration information related to SRS-p includes configuration information of an SRS resource set, and the SRS resource set information can include information indicating whether the SRS resource set is aperiodic, periodic, or semi-persistent. For convenience of explanation, the semi-persistent type is assumed in Figure 14. The configuration information related to SRS-p can be provided for each UL BWP of each CC.

[0224] The terminal may receive configuration information for BW aggregation of SRS-p from the network (A10). The configuration information for BW aggregation of SRS-p may be received through RRC signaling. The configuration information for BW aggregation of SRS-p may include a list of SRS-p resource sets for BW aggregation. The list of SRS-p resource sets for BW aggregation may be configurable across multiple CCs.

[0225] The terminal may receive an activation instruction for the semi-persistent SRS-p from the network (A15). The activation instruction for the semi-persistent SRS-p may be received through MAC signaling.

[0226] For convenience of explanation, it is assumed that an activation instruction for a semi-persistent SRS-p indicates activation of one of the SRS-p resource sets included in the list. Based on the activation instruction for 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.

[0227] The terminal can periodically transmit BW aggregated semi-persistent SRS-p based on the activation of the SRS-p resource set (A20, A21, A22).

[0228] The UE may receive a semi-persistent SRS-p deactivation instruction from the network (A25). The semi-persistent SRS-p deactivation instruction may be received through MAC signaling. If the semi-persistent SRS-p deactivation instruction 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.

[0229] FIG. 15 is a diagram illustrating aperiodic SRS transmission in a wireless communication system according to an embodiment.

[0230] Referring to Figure 15, the terminal receives configuration information related to SRS-p for positioning from the network (B05). The configuration information related to SRS-p can be received through RRC signaling. The configuration information related to SRS-p includes configuration information of an SRS resource set, and the SRS resource set information can include information indicating whether the SRS resource set is of an aperiodic, periodic, or semi-permanent type. For convenience of explanation, the aperiodic type is assumed in Figure 15. The configuration information related to SRS-p can be provided for each uplink BWP of each CC.

[0231] The terminal may receive configuration information for BW aggregation of SRS-p from the network (B10). The configuration information for BW aggregation of SRS-p may be received through RRC signaling. The configuration information for BW aggregation of SRS-p may include a list of SRS-p resource sets for BW aggregation. The list of SRS-p resource sets for BW aggregation may be configurable across multiple CCs.

[0232] The terminal may receive DCI that triggers aperiodic SRS-p through PDCCH monitoring in at least one CC (B15) (B20). Assume that the DCI is received in the first CC.

[0233] For ease of explanation, it is assumed that the 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.

[0234] Based on the triggering of a non-periodic SRS-p for one of the SRS-p resource sets included in the list, the terminal can transmit the BW aggregated semi-persistent SRS-p not only through the first SRS-p resource set on the first CC but also through all SRS-p resource sets of all CCs included in the list (B25).

[0235] FIG. 16 is a diagram illustrating a flow of an SRS transmission method of a terminal according to an embodiment.

[0236] Referring to FIG. 16, the terminal may receive configuration information for interlinking multiple SRS resource sets on multiple component carriers (CCs) for SRS bandwidth aggregation (C05).

[0237] The terminal may receive downlink control information (DCI) that triggers aperiodic SRS transmission on a first SRS resource set (C10).

[0238] The terminal may perform the aperiodic SRS transmission (C15). Based on the fact that the first SRS resource set in which the aperiodic SRS transmission is triggered is one of the SRS resource sets linked to each other through the configuration information, the terminal may perform the aperiodic SRS transmission on all of the CCs in which the SRS resource sets are configured.

[0239] The first SRS resource set is configured on a first CC among the plurality of CCs, and a second SRS resource set associated with the first SRS resource set is configured on a second CC among the plurality of CCs. Based on this, the aperiodic SRS transmission can be performed by the SRS bandwidth aggregation in the first SRS resource set on the first CC and the second SRS resource set on the second CC.

[0240] The terminal can maintain phase continuity for the aperiodic SRS transmissions performed on the multiple SRS resource sets that are interconnected for the SRS bandwidth aggregation.

[0241] The plurality of SRS resource sets linked to each other for bandwidth aggregation of the SRS may be related to positioning of the terminal.

[0242] The configuration information for linking the plurality of SRS resource sets with each other may be received through radio resource control (RRC) signaling.

[0243] The multiple SRS resource sets linked to each other for the SRS bandwidth aggregation may have the same comb type (e.g., size), the same SRS symbol length, and the same SRS symbol position.

[0244] The terminal may not assume that SRS resource sets configured to have at least one of different comb types, SRS symbol lengths, and SRS symbol positions are mutually linked for the SRS bandwidth aggregation.

[0245] The same power parameters may be configured for the multiple SRS resource sets that are linked together for the SRS bandwidth aggregation.

[0246] FIG. 17 is a diagram showing the flow of an SRS reception method in a base station.

[0247] Referring to FIG. 17, the base station may transmit configuration information for interlinking multiple SRS resource sets on multiple component carriers (CCs) to the terminal for SRS (sounding reference signal) bandwidth aggregation (D05).

[0248] The base station may transmit downlink control information (DCI) to the terminal, which triggers aperiodic SRS transmission on a first SRS resource set (D10).

[0249] The base station may receive an aperiodic SRS from the terminal (D15). Based on the fact that the first SRS resource set in which the aperiodic SRS transmission is triggered is one of the plurality of SRS resource sets linked to each other through the configuration information, the aperiodic SRS may be received in all of the plurality of CCs in which the plurality of SRS resource sets are configured.

[0250] The first SRS resource set is configured on a first CC among the plurality of CCs, and a second SRS resource set associated with the first SRS resource set is configured on a second CC among the plurality of CCs. Based on this, the aperiodic SRS reception can be performed by the SRS bandwidth aggregation in the first SRS resource set on the first CC and the second SRS resource set on the second CC.

[0251] Phase continuity can be maintained for the aperiodic SRS reception performed on the multiple SRS resource sets that are interconnected for the SRS bandwidth aggregation.

[0252] The plurality of SRS resource sets linked to each other for the SRS bandwidth aggregation may be related to positioning of the terminal.

[0253] The configuration information for linking the plurality of SRS resource sets with each other may be transmitted through radio resource control (RRC) signaling.

[0254] The multiple SRS resource sets linked to each other for the SRS bandwidth aggregation may have the same comb type (e.g., size), the same SRS symbol length, and the same SRS symbol position.

[0255] SRS resource sets configured to differ in at least one of comb type, SRS symbol length, and SRS symbol position may not be linked to each other for the SRS bandwidth aggregation.

[0256] The same power parameters may be configured for the multiple SRS resource sets that are linked together for the SRS bandwidth aggregation.

[0257] FIG. 18 is a diagram illustrating a communication system 1 to which the present invention is applied.

[0258] Referring to FIG. 18, a communication system 1 applicable to the present invention includes wireless devices, base stations, and a network. Here, the wireless devices refer to devices that communicate using wireless connection technologies (e.g., 5G NR, LTE), and are also referred to as communication / wireless / 5G devices. The wireless devices include, but are not limited to, a robot 100a, vehicles 100b-1 and 100b-2, an XR (eXtended Reality) device 100c, a handheld device 100d, a home appliance 100e, an IoT (Internet of Things) device 100f, and an AI server / device 400. For example, the vehicles include vehicles equipped with wireless communication capabilities, autonomous vehicles, vehicles capable of vehicle-to-vehicle communication, and the like. Here, the vehicles include unmanned aerial vehicles (UAVs) (e.g., drones). XR devices include Augmented Reality (AR), Virtual Reality (VR), and Mixed Reality (MR) devices, and are embodied in the form of Head-Mounted Devices (HMDs), Head-Up Displays (HUDs) mounted on vehicles, TVs, smartphones, computers, wearable devices, home appliances, digital billboards, vehicles, robots, etc. Mobile devices include smartphones, smart pads, wearable devices (e.g., smart watches, smart glasses), computers (e.g., laptops, etc.), etc. Home appliances include TVs, refrigerators, washing machines, etc. IoT devices include sensors, smart meters, etc. For example, base stations and networks may also be embodied as wireless devices, and a specific wireless device 200a may operate as a base station / network node for other wireless devices.

[0259] The wireless devices 100a to 100f are connected to a network 300 via a base station 200. Artificial Intelligence (AI) technology is applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f are connected to an AI server 400 via the network 300. The network 300 is configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. The wireless devices 100a to 100f can communicate with each other via the base station 200 / network 300, but can also communicate directly without going through the base station / network (e.g., sidelink communication). For example, vehicles 100b-1 and 100b-2 can communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to Everything) communication). IoT devices (e.g., sensors) can also communicate directly with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0260] Wireless communication / connections 150a, 150b, and 150c are performed between the wireless devices 100a to 100f and the base stations 200, and between the base stations 200. Here, the wireless communication / connections are performed using various wireless connection technologies such as uplink / downlink communication 150a and sidelink communication 150b (or D2D communication), and communication between base stations 150c (e.g., relay, Integrated Access Backhaul (IAB)) (e.g., 5G NR). Through the wireless communication / connections 150a, 150b, and 150c, the wireless devices and the base stations, and the base stations, can transmit / receive wireless signals to / from each other. For example, the wireless communication / connections 150a, 150b, and 150c can transmit / receive signals via various physical channels. To this end, according to various proposals of the present invention, any one of various configuration information setting processes for transmitting / receiving wireless signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, resource mapping / demapping, etc.), and resource allocation processes is performed.

[0261] FIG. 19 is a diagram illustrating a wireless device to which the present invention can be applied.

[0262] 19, a first wireless device 100 and a second wireless device 200 transmit and receive wireless signals using various wireless access technologies (e.g., LTE, NR), where {first wireless device 100, second wireless device 200} corresponds to {wireless device 100x, base station 200} and / or {wireless device 100x, wireless device 100x} in FIG.

[0263] The first wireless device 100 includes one or more processors 102 and one or more memories 104, and further includes one or more transceivers 106 and / or one or more antennas 108. The processor 102 is configured to control the memory 104 and / or the transceiver 106 to implement the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein. For example, the processor 102 processes information in the memory 104 to generate first information / signals and then transmits a wireless signal including the first information / signals via the transceiver 106. The processor 102 also receives a wireless signal including second information / signals via the transceiver 106 and then stores information obtained from signal processing of the second information / signals in the memory 104. The memory 104 is coupled to the processor 102 and stores various information related to the operation of the processor 102. For example, the memory 104 stores software code including instructions for performing some or all of the processes controlled by the processor 102 or for implementing the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein. Here, the processor 102 and memory 104 are part of a communication modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE, NR). The transceiver 106 is coupled to the processor 102 and transmits and / or receives wireless signals via one or more antennas 108. The transceiver 106 includes a transmitter and / or a receiver. The transceiver 106 may also be referred to as an RF (radio frequency) unit. In one embodiment of the present invention, a wireless device may also refer to a communication modem / circuit / chip.

[0264] The second wireless device 200 includes one or more processors 202 and one or more memories 204, and further includes one or more transceivers 206 and / or one or more antennas 208. The processor 202 is configured to control the memory 204 and / or the transceiver 206 to implement the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein. For example, the processor 202 processes information in the memory 204 to generate third information / signal, and then transmits a wireless signal including the third information / signal via the transceiver 206. The processor 202 also receives a wireless signal including fourth information / signal via the transceiver 206, and then stores information obtained from signal processing of the fourth information / signal in the memory 204. The memory 204 is coupled to the processor 202 and stores various information related to the operation of the processor 202. For example, the memory 204 stores software code including instructions for performing some or all of the processes controlled by the processor 202 or for implementing the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein. Here, the processor 202 and memory 204 are part of a communication modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE, NR). The transceiver 206 is coupled to the processor 202 and transmits and / or receives wireless signals via one or more antennas 208. The transceiver 206 includes a transmitter and / or a receiver. The transceiver 206 may also be referred to as an RF unit. In one embodiment of the present invention, the wireless device may also refer to a communication modem / circuit / chip.

[0265] The hardware elements of the wireless device 100, 200 are described in more detail below. Without limitation, one or more protocol layers may be implemented by one or more processors 102, 202. For example, one or more processors 102, 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). The one or more processors 102, 202 may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) according to the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein. The one or more processors 102, 202 may generate messages, control information, data, or information according to the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein. The one or more processors 102, 202 generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information according to the functions, procedures, suggestions, and / or methods disclosed herein and provide them to the one or more transceivers 106, 206. The one or more processors 102, 202 receive signals (e.g., baseband signals) from the one or more transceivers 106, 206 and obtain the PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein.

[0266] The one or more processors 102, 202 may also be referred to as a controller, microcontroller, microprocessor, or microcomputer. The one or more processors 102, 202 may be implemented using hardware, firmware, software, or a combination thereof. For example, the one or more processors 102, 202 may include 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). The descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein may be implemented using firmware or software, and the firmware or software may be embodied to include modules, procedures, functions, etc. Firmware or software configured to perform the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein may be included in the one or more processors 102, 202 or may be stored in one or more memories 104, 204 and executed by the one or more processors 102, 202. The descriptions, functions, procedures, suggestions, methods and / or flow charts disclosed in this specification may be embodied using firmware or software in the form of code, instructions and / or sets of instructions.

[0267] The one or more memories 104, 204 may be coupled to the one or more processors 102, 202 and may store various types of data, signals, messages, information, programs, code, instructions, and / or instructions. The one or more memories 104, 204 may be comprised of ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer-readable storage media, and / or combinations thereof. The one or more memories 104, 204 may be located internal and / or external to the one or more processors 102, 202. Additionally, the one or more memories 104, 204 may be coupled to the one or more processors 102, 202 via various techniques, such as wired or wireless connections.

[0268] One or more transceivers 106, 206 can transmit user data, control information, wireless signals / channels, etc., as referenced in the methods and / or flowcharts herein to one or more other devices. One or more transceivers 106, 206 can receive user data, control information, wireless signals / channels, etc., as referenced in the descriptions, functions, procedures, suggestions, methods and / or flowcharts herein from one or more other devices. For example, one or more transceivers 106, 206 can be coupled to one or more processors 102, 202 and can transmit and receive wireless signals. For example, one or more processors 102, 202 can control one or more transceivers 106, 206 to transmit user data, control information, or wireless signals to one or more other devices. Also, one or more processors 102, 202 can control one or more transceivers 106, 206 to receive user data, control information, or wireless signals from one or more other devices. Furthermore, one or more transceivers 106, 206 are coupled to one or more antennas 108, 208 and are configured to transmit and receive user data, control information, radio signals / channels, etc., as referred to in the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein via the one or more antennas 108, 208. In this specification, one or more antennas may refer to multiple physical antennas or multiple logical antennas (e.g., antenna ports). The one or more transceivers 106, 206 convert the received user data, control information, radio signals / channels, etc., from RF band signals to baseband signals for processing by one or more processors 102, 202. The one or more transceivers 106, 206 convert the user data, control information, radio signals / channels, etc., processed by one or more processors 102, 202, from baseband signals to RF band signals. For this purpose, the one or more transceivers 106, 206 include (analog) oscillators and / or filters.

[0269] 20 is a diagram showing another example of a wireless device to which the present invention is applied. The wireless device may be implemented in various forms depending on the use case / service (see FIG. 18).

[0270] 20, wireless devices 100, 200 correspond to the wireless devices 100, 200 of FIG. 19 and are composed of various elements, components, units / sections, and / or modules. For example, the wireless devices 100, 200 include a communication unit 110, a control unit 120, a memory unit 130, and an additional element 140. The communication unit includes a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 includes one or more processors 102, 202 and / or one or more memories 104, 204 in FIG. 19. For example, the transceiver 114 includes one or more transceivers 106, 206 and / or one or more antennas 108, 208 in FIG. 19. The control unit 120 is electrically coupled to the communication unit 110, the memory unit 130, and the additional element 140 and controls the overall operation of the wireless device. For example, the control unit 120 controls the electrical / mechanical operations of the wireless device based on the programs / codes / instructions / information stored in the memory unit 130. The control unit 120 also transmits the information stored in the memory unit 130 to the outside (e.g., another communication device) via the communication unit 110 via a wireless / wired interface, or stores information received from the outside (e.g., another communication device) via the communication unit 110 via a wireless / wired interface in the memory unit 130.

[0271] The additional element 140 may be configured in various ways depending on the type of wireless device. For example, the additional element 140 may include any one of a power unit / battery, an input / output unit (I / O unit), a driving unit, and a computer unit. Wireless devices may be embodied in the form of, but not limited to, a robot (FIG. 19, 100a), a vehicle (FIG. 19, 100b-1, 100b-2), an XR device (FIG. 19, 100c), a mobile device (FIG. 19, 100d), a home appliance (FIG. 19, 100e), an IoT device (FIG. 19, 100f), a digital broadcasting terminal, a hologram device, a public safety device, an MTC device, a medical device, a FinTech device (or financial device), a security device, a climate / environment device, an AI server / device (FIG. 19, 400), a base station (FIG. 19, 200), a network node, etc. Depending on the use case / service, the wireless device may be mobile or may be used in a fixed location.

[0272] In FIG. 20, the various elements, components, units / sections and / or modules within the wireless devices 100, 200 are all connected to each other by wired interfaces or at least some are connected wirelessly by a communication section 110. For example, in the wireless devices 100 and 200, the control unit 120 and the communication unit 110 are connected by wire, and the control unit 120 and the first unit (e.g., 130, 140) are connected wirelessly via the communication unit 110. Furthermore, each element, component, unit / section and / or module in the wireless devices 100 and 200 further includes one or more elements. For example, the control unit 120 is configured with a set of one or more processors. For example, the control unit 120 is configured with a set of a communication control processor, an application processor, an ECU (Electronic Control Unit), a graphics processor, a memory control processor, etc. As another example, the memory unit 130 is configured with a RAM (Random Access Memory), a DRAM (Dynamic RAM), a ROM (Read Only Memory), a flash memory, a volatile memory, a non-volatile memory and / or a combination thereof.

[0273] 21 is a diagram illustrating an example of a vehicle or an autonomous vehicle to which the present invention is applied. The vehicle or the autonomous vehicle may be embodied as a mobile robot, a car, a train, an aerial vehicle (AV), a ship, etc.

[0274] 21, a vehicle or autonomous vehicle 100 includes 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 is configured as part of the communication unit 110. Blocks 110 / 130 / 140a to 140d correspond to blocks 110 / 130 / 140 in FIG. 20, respectively.

[0275] The communication unit 110 transmits and receives signals (e.g., data, control signals, etc.) to and from external devices such as other vehicles, base stations (e.g., base stations, roadside units, etc.), and servers. The control unit 120 controls elements of the vehicle or autonomous vehicle 100 to perform various operations. The control unit 120 includes an ECU (Electronic Control Unit). The driving unit 140a causes the vehicle or autonomous vehicle 100 to move on the ground. The driving unit 140a includes an engine, a motor, a powertrain, wheels, brakes, a steering device, etc. The power supply unit 140b supplies power to the vehicle or autonomous vehicle 100 and includes wired / wireless charging circuits, a battery, etc. The sensor unit 140c can obtain vehicle status, surrounding environment information, user information, etc. The sensor unit 140c includes an IMU (inertial measurement unit) sensor, a collision sensor, a wheel sensor, a speed sensor, an inclination sensor, a weight detection sensor, a heading sensor, a position module, a vehicle forward / reverse sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illuminance sensor, a pedal position sensor, etc. The autonomous driving unit 140d implements technology for maintaining a lane while driving, technology for automatically adjusting speed such as adaptive cruise control, technology for automatically driving along a predetermined route, technology for automatically setting a route and driving when a destination is set, etc.

[0276] For example, the communication unit 110 receives map data, traffic information data, etc. from an external server. The autonomous driving unit 140d generates an autonomous driving route and a driving plan based on the obtained data. The control unit 120 controls the driving unit 140a (e.g., adjusting speed / direction) so that the vehicle or autonomous vehicle 100 moves along the autonomous driving route according to the driving plan. The communication unit 110 non-periodically obtains the latest traffic information data from an external server during autonomous driving and also obtains surrounding traffic information data from surrounding vehicles. In addition, the sensor unit 140c obtains vehicle status and surrounding environment information during autonomous driving. The autonomous driving unit 140d updates the autonomous driving route and driving plan based on the newly obtained data / information. The communication unit 110 transmits information regarding the vehicle position, autonomous driving route, driving plan, etc. to an external server. The external server can predict traffic information data using AI technology based on information collected from the vehicle or autonomous vehicle and provide the predicted traffic information data to the vehicle or autonomous vehicle.

[0277] The above-described embodiments are combinations of the elements and features of the present invention in a predetermined form. Each element or feature should be considered optional unless otherwise explicitly stated. Each element or feature may be implemented without being combined with other elements or features. It is also possible to combine some elements and / or features to form an embodiment of the present invention. The order of operations described in the embodiments of the present invention may be changed. Some elements or features of any embodiment may be included in other embodiments, or may be replaced with corresponding elements or features of other embodiments. Claims that are not explicitly cited in the claims may be combined to form an embodiment, or may be included as new claims by amendment after filing.

[0278] It is obvious to those skilled in the art that the present invention can be embodied in other specific forms without departing from the characteristics of the present invention. Therefore, the above detailed description should not be construed as limiting in all respects, but should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention.

[0279] [Industrial Applicability] The present invention can be used in a terminal, a base station or other equipment of a wireless mobile communication system.

[0280] [Claims at the time of international application] [Claim 1] A method for a terminal to transmit a sounding reference signal (SRS) in a wireless communication system, comprising: receiving configuration information for interlinking multiple SRS resource sets on multiple component carriers (CCs) for SRS bandwidth aggregation; receiving downlink control information (DCI) that triggers aperiodic SRS transmissions on a first SRS resource set; and performing the aperiodic SRS transmission; the aperiodic SRS transmission is performed in all of the plurality of CCs to which the plurality of SRS resource sets are configured, based on the fact that the first SRS resource set in which the aperiodic SRS transmission is triggered is one of the plurality of SRS resource sets that are linked to each other through the configuration information. [Claim 2] 2. The method of claim 1, wherein the aperiodic SRS transmission is performed through the SRS bandwidth aggregation in a first SRS resource set on the first CC and a second SRS resource set on the second CC based on the first SRS resource set being configured on a first CC among the plurality of CCs and the second SRS resource set associated with the first SRS resource set being configured on a second CC among the plurality of CCs. [Claim 3] 2. The method of claim 1, wherein the terminal maintains phase continuity for the aperiodic SRS transmissions performed on the plurality of SRS resource sets that are mutually coordinated for the SRS bandwidth aggregation. [Claim 4] The method of claim 1 , wherein the plurality of SRS resource sets linked together for the SRS bandwidth aggregation are related to positioning of the terminal. [Claim 5] The method of claim 1 , wherein the configuration information coordinating the plurality of SRS resource sets with each other is received through radio resource control (RRC) signaling. [Claim 6] The method of claim 1 , wherein the plurality of SRS resource sets linked to each other for the SRS bandwidth aggregation have the same comb type, the same SRS symbol length, and the same SRS symbol position. [Claim 7] 2. The method of claim 1, wherein the terminal does not assume that SRS resource sets configured to have at least one of a comb type, an SRS symbol length, and an SRS symbol position different from each other are linked to each other for the SRS bandwidth aggregation. [Claim 8] The method of claim 1 , wherein the plurality of SRS resource sets that are mutually linked for the SRS bandwidth aggregation are configured with the same power parameters. [Claim 9] A processor-readable storage medium, A processor-readable recording medium having a program recorded thereon for executing the method of claim 1. [Claim 10] A device for wireless communication, a memory for storing instruction words; and a processor that executes the instructions to perform an operation, The operation of the processor is receiving configuration information for interlinking a plurality of SRS resource sets on a plurality of component carriers (CCs) for SRS bandwidth aggregation; receiving downlink control information (DCI) that triggers aperiodic SRS transmissions on a first SRS resource set; and performing the aperiodic SRS transmission; and, based on the fact that the first SRS resource set in which the aperiodic SRS transmission is triggered is one of the plurality of SRS resource sets linked to each other through the configuration information, the aperiodic SRS transmission is performed in all of the plurality of CCs in which the plurality of SRS resource sets are configured. [Claim 11] a transceiver, The device of claim 10 , wherein the device is a terminal operating in a wireless communication system. [Claim 12] The device of claim 10, wherein the device is a processing device configured to control a terminal operating in a wireless communication system. [Claim 13] A method for a base station to receive a sounding reference signal (SRS) in a wireless communication system, comprising: Sending configuration information to the terminal for interlinking multiple SRS resource sets on multiple component carriers (CCs) for SRS bandwidth aggregation; transmitting downlink control information (DCI) to the terminal, the DCI triggering aperiodic SRS transmission on a first SRS resource set; and receiving a non-periodic SRS from the terminal; the aperiodic SRS is received in all of the plurality of CCs to which the plurality of SRS resource sets are configured, based on the fact that the first SRS resource set in which the aperiodic SRS transmission is triggered is one of the plurality of SRS resource sets that are linked to each other through the configuration information. [Claim 14] A processor-readable storage medium, A processor-readable recording medium having a program recorded thereon for executing the method of claim 13. [Claim 15] 1. A base station for wireless communication, comprising: a memory for storing instruction words; and a processor that operates by executing the instruction words, The operation of the processor is For SRS (Sounding Reference Signal) bandwidth aggregation, transmitting configuration information for associating multiple SRS resource sets on multiple component carriers (CCs) to a terminal; transmitting downlink control information (DCI) to the terminal, the DCI triggering aperiodic SRS transmission on a first SRS resource set; and receiving a non-periodic SRS from the terminal; a base station, wherein the aperiodic SRS is received in all of the plurality of CCs to which the plurality of SRS resource sets are configured, based on the fact that the first SRS resource set in which the aperiodic SRS transmission is triggered is one of the plurality of SRS resource sets that are linked to each other through the configuration information.

Claims

1. A method for a terminal to transmit a sounding reference signal (SRS) in a wireless communication system, comprising: receiving configuration information for interlinking multiple SRS resource sets on multiple component carriers (CCs) for SRS bandwidth aggregation; receiving downlink control information (DCI) that triggers aperiodic SRS transmissions on a first SRS resource set; and performing the aperiodic SRS transmission; a method for performing aperiodic SRS transmission in all of the plurality of CCs to which the plurality of SRS resource sets are configured, based on the fact that the first SRS resource set in which the aperiodic SRS transmission is triggered is one of the plurality of SRS resource sets that are mutually linked through the configuration information.

2. 2. The method of claim 1, wherein the aperiodic SRS transmission is performed through the SRS bandwidth aggregation in a first SRS resource set on the first CC and a second SRS resource set on the second CC based on the first SRS resource set being configured on a first CC among the plurality of CCs and the second SRS resource set aligned with the first SRS resource set being configured on a second CC among the plurality of CCs.

3. 2. The method of claim 1, wherein the terminal maintains phase continuity for the aperiodic SRS transmissions performed on the plurality of SRS resource sets that are mutually coordinated for the SRS bandwidth aggregation.

4. The method of claim 1 , wherein the plurality of SRS resource sets linked together for the SRS bandwidth aggregation are related to positioning of the terminal.

5. The method of claim 1 , wherein the configuration information for coordinating the plurality of SRS resource sets with each other is received through radio resource control (RRC) signaling.

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

7. 2. The method of claim 1, wherein the terminal does not assume that SRS resource sets configured to have at least one of a comb type, an SRS symbol length, and an SRS symbol position different from each other are linked to each other for the SRS bandwidth aggregation.

8. The method of claim 1 , wherein the plurality of SRS resource sets that are mutually associated for the SRS bandwidth aggregation are configured with the same power parameters.

9. A processor-readable storage medium, A processor-readable recording medium having a program recorded thereon for executing the method of claim 1.

10. 1. An apparatus for wireless communication, comprising: a memory for storing instruction words; and a processor that executes the instructions to perform an operation, The operation of the processor is receiving configuration information for interlinking a plurality of sounding reference signal (SRS) resource sets on a plurality of component carriers (CCs) for SRS bandwidth aggregation; receiving downlink control information (DCI) that triggers aperiodic SRS transmissions on a first SRS resource set; and performing the aperiodic SRS transmission; the aperiodic SRS transmission is performed in all of the plurality of CCs to which the plurality of SRS resource sets are configured, based on the fact that the first SRS resource set in which the aperiodic SRS transmission is triggered is one of the plurality of SRS resource sets that are mutually linked through the configuration information.

11. a transceiver, The device of claim 10 , wherein the device is a terminal operating in a wireless communication system.

12. The device of claim 10 , wherein the device is a processing device configured to control a terminal operating in a wireless communication system.

13. A method for a base station to receive a sounding reference signal (SRS) in a wireless communication system, comprising: Sending configuration information to the terminal for SRS bandwidth aggregation, the configuration information associating multiple SRS resource sets on multiple component carriers (CCs); transmitting downlink control information (DCI) to the terminal, triggering aperiodic SRS transmission on a first SRS resource set; and receiving a non-periodic SRS from the terminal; the aperiodic SRS is received in all of the plurality of CCs to which the plurality of SRS resource sets are configured, based on the fact that the first SRS resource set in which the aperiodic SRS transmission is triggered is one of the plurality of SRS resource sets that are mutually linked through the configuration information.

14. A processor-readable storage medium, A processor-readable recording medium having a program recorded thereon for executing the method of claim 13.

15. 1. A base station for wireless communication, comprising: a memory for storing instruction words; and a processor that operates by executing the instruction words, The operation of the processor is transmitting, to the terminal, configuration information for linking a plurality of SRS resource sets on a plurality of component carriers (CCs) for SRS bandwidth aggregation; transmitting downlink control information (DCI) to the terminal, triggering aperiodic SRS transmission on a first SRS resource set; and receiving a non-periodic SRS from the terminal; a base station, wherein the aperiodic SRS is received in all of the plurality of CCs in which the plurality of SRS resource sets are configured, based on the fact that the first SRS resource set in which the aperiodic SRS transmission is triggered is one of the plurality of SRS resource sets that are mutually linked through the configuration information.

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