Method and apparatus for estimating UE location in wireless communication system

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting higher data transfer rates. A method performed by UE in a wireless communication system, according to an embodiment of the present disclosure, comprises the steps of: receiving a radio resource control (RRC) message including configuration information for a combination of aggregated sounding reference signal (SRS) resource sets; receiving a medium access control-control element (MAC CE) for activating or deactivating the aggregated SRS resource sets; and transmitting an SRS for positioning on the basis of at least one aggregated SRS resource set activated by the MAC CE, wherein the MAC CE includes first information indicating the combination of the aggregated SRS resource sets and second information indicating an activation or deactivation state for each of the aggregated SRS resource sets.

Description

Method and device for estimating the location of a user terminal in a wireless communication system

[0001] The present disclosure relates to a wireless communication system. More specifically, the present disclosure relates to a method and device for estimating the location of a user terminal using aggregated UL-SRS.

[0002] 5G mobile communication technology defines a wide frequency band to enable fast transmission speeds and new services, and can be implemented not only in the sub-6GHz frequency band such as 3.5 gigahertz (3.5GHz), but also in the ultra-high frequency band called millimeter wave (mmWave) such as 28GHz and 39GHz ('Above 6GHz'). In addition, for 6G mobile communication technology, which is called the system after 5G communication (Beyond 5G), implementation in the terahertz band (for example, the 3 terahertz (3THz) band at 95GHz) is being considered to achieve a transmission speed that is 50 times faster than 5G mobile communication technology and an ultra-low latency time that is reduced to one-tenth.

[0003] In the early stages of 5G mobile communication technology, the goal is to support services and satisfy performance requirements for enhanced Mobile Broadband (eMBB), Ultra-Reliable Low-Latency Communications (URLLC), and massive Machine-Type Communications (mMTC). These include beamforming and massive MIMO to mitigate path loss of radio waves in ultra-high frequency bands and increase the transmission distance of radio waves, support for various numerologies (such as operation of multiple subcarrier intervals) and dynamic operation of slot formats for efficient use of ultra-high frequency resources, initial access technology to support multi-beam transmission and wideband, definition and operation of BWP (Bidth Part), new channel coding methods such as LDPC (Low Density Parity Check) codes for large-capacity data transmission and Polar Code for reliable transmission of control information, and L2 pre-processing (L2). Standardization has been made for network slicing, which provides dedicated networks specialized for specific services, and pre-processing.

[0004] Currently, discussions are underway to improve and enhance the initial 5G mobile communication technology in consideration of the services that 5G mobile communication technology was intended to support, and physical layer standardization is in progress for technologies such as V2X (Vehicle-to-Everything) to help autonomous vehicles make driving decisions and increase user convenience based on their own location and status information transmitted by vehicles, NR-U (New Radio Unlicensed) for the purpose of system operation that complies with various regulatory requirements in unlicensed bands, NR terminal low power consumption technology (UE Power Saving), Non-Terrestrial Network (NTN), which is direct terminal-satellite communication to secure coverage in areas where communication with terrestrial networks is impossible, and Positioning.

[0005] In addition, standardization of wireless interface architecture / protocols is in progress for technologies such as intelligent factories (Industrial Internet of Things, IIoT) to support new services through linkage and convergence with other industries, Integrated Access and Backhaul (IAB) that provides nodes for expanding network service areas by integrating wireless backhaul links and access links, Mobility Enhancement technology including Conditional Handover and Dual Active Protocol Stack (DAPS) handover, and 2-step random access (2-step RACH for NR) that simplifies random access procedures. Standardization is also in progress for system architecture / services such as 5G baseline architecture (e.g., Service-based Architecture, Service-based Interface) for grafting Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies, and Mobile Edge Computing (MEC) that provides services based on the location of the terminal.

[0006] Once these 5G mobile communication systems are commercialized, an explosive increase in connected devices will be connected to the communication network, necessitating enhanced functionality and performance of 5G mobile communication systems and integrated operation of these connected devices. To this end, new research will be conducted on improving 5G performance and reducing complexity, supporting AI services, supporting metaverse services, and drone communications by utilizing eXtended Reality (XR), Artificial Intelligence (AI), and Machine Learning (ML) to efficiently support Augmented Reality (AR), Virtual Reality (VR), and Mixed Reality (MR).

[0007] In addition, the development of these 5G mobile communication systems includes new waveforms to ensure coverage in the terahertz band of 6G mobile communication technology, multi-antenna transmission technologies such as Full Dimensional MIMO (FD-MIMO), Array Antenna, and Large Scale Antenna, metamaterial-based lenses and antennas to improve the coverage of terahertz band signals, high-dimensional spatial multiplexing technology using Orbital Angular Momentum (OAM), Reconfigurable Intelligent Surface (RIS) technology, as well as full duplex technology to improve the frequency efficiency and system network of 6G mobile communication technology, satellite, AI (Artificial Intelligence) from the design stage and AI-based communication technology that realizes system optimization by internalizing end-to-end AI support functions, and ultra-high-performance communication and computing resources to provide services with complexity that exceeds the limits of terminal computing capabilities. It can serve as a basis for the development of next-generation distributed computing technologies that can be realized by utilizing them.

[0008] The present disclosure aims to provide a device and method capable of effectively providing a location estimation service of a terminal in a wireless communication system.

[0009] According to one embodiment of the present disclosure, a method performed by a terminal of a wireless communication system is provided. The method comprises the steps of: receiving a radio resource control (RRC) message including configuration information for a combination of aggregated sounding reference signal (SRS) resource sets; receiving a medium access control-control element (MAC CE) for activating or deactivating the aggregated SRS resource sets; and transmitting an SRS for positioning based on at least one aggregated SRS resource set activated by the MAC CE. The MAC CE includes first information indicating the combination of the aggregated SRS resource sets and second information indicating an activation or deactivation state of each of the aggregated SRS resource sets.

[0010] According to one embodiment of the present disclosure, a method performed by a base station of a wireless communication system is provided. The method comprises the steps of: transmitting an RRC message including configuration information for a combination of aggregated SRS resource sets; transmitting a MAC CE for activating or deactivating the aggregated SRS resource sets; and receiving an SRS for positioning based on at least one aggregated SRS resource set activated by the MAC CE. The MAC CE includes first information indicating the combination of the aggregated SRS resource sets and second information indicating an activation or deactivation state of each of the aggregated SRS resource sets.

[0011] According to one embodiment of the present disclosure, a terminal of a wireless communication system is provided. The terminal includes a transceiver and a control unit. The control unit is configured to receive, through the transceiver, an RRC message including configuration information for a combination of integrated SRS resource sets, receive, through the transceiver, a MAC CE for activating or deactivating the integrated SRS resource sets, and transmit, through the transceiver, an SRS for positioning based on at least one integrated SRS resource set activated by the MAC CE. The MAC CE includes first information indicating the combination of the integrated SRS resource sets and second information indicating an activation or deactivation state for each of the integrated SRS resource sets.

[0012] According to one embodiment of the present disclosure, a base station of a wireless communication system is provided. The base station includes a transceiver and a control unit. The control unit is configured to transmit, through the transceiver, an RRC message including configuration information for a combination of integrated SRS resource sets, transmit, through the transceiver, a MAC CE for activating or deactivating the integrated SRS resource sets, and receive, through the transceiver, an SRS for positioning based on at least one integrated SRS resource set activated by the MAC CE. The MAC CE includes first information indicating the combination of the integrated SRS resource sets and second information indicating an activation or deactivation state for each of the integrated SRS resource sets.

[0013] The present disclosure provides a device and method capable of effectively providing a service in a wireless communication system.

[0014] FIG. 1 is a diagram illustrating the structure of an NR system according to one embodiment of the present disclosure.

[0015] FIG. 2 is a diagram illustrating a wireless protocol structure in an LTE and NR system according to one embodiment of the present disclosure.

[0016] FIG. 3 is a diagram illustrating a network structure for providing a terminal location estimation service (LCS) in a next-generation mobile communication system according to one embodiment of the present disclosure.

[0017] FIG. 4 is a flowchart of a process for performing LCS in a next-generation mobile communication system according to one embodiment of the present disclosure.

[0018] FIG. 5 is a flowchart of an LPP (LTE Positioning Protocol) message exchange process between a terminal and an LMF (Location Management Function) according to one embodiment of the present disclosure.

[0019] FIG. 6 is a diagram illustrating a process for setting up a terminal's SRS (Sounding Reference Signal) transmission for location estimation according to an embodiment of the present disclosure.

[0020] FIG. 7 is a diagram illustrating a scenario for estimating the location of a terminal based on UL-SRS transmitted by the terminal according to one embodiment of the present disclosure.

[0021] FIG. 8 is a diagram illustrating a scenario in which different UL-SRSs transmitted on different carriers (or serving cells) are combined according to one embodiment of the present disclosure.

[0022] FIG. 9 is a flowchart of a signaling process for using UL-SRS BW aggregation for estimating the location of a terminal according to one embodiment of the present disclosure.

[0023] FIG. 10 is a diagram illustrating UL-SRS configuration information elements included in an RRCReconfiguration message according to one embodiment of the present disclosure.

[0024] FIG. 11 is a diagram illustrating a configuration of aggregated UL-SRS Resource Sets according to one embodiment of the present disclosure.

[0025] FIG. 12a is a diagram illustrating an example structure of a MAC CE used to activate or deactivate aggregated UL-SRS Resource Sets according to one embodiment of the present disclosure.

[0026] FIG. 12b is a diagram illustrating an example structure of a MAC CE used to activate or deactivate aggregated UL-SRS Resource Sets according to one embodiment of the present disclosure.

[0027] FIG. 12c is a diagram illustrating an example structure of a MAC CE used to activate or deactivate aggregated UL-SRS Resource Sets according to one embodiment of the present disclosure.

[0028] FIG. 13 is a diagram illustrating a terminal device according to one embodiment of the present disclosure.

[0029] FIG. 14 is a diagram illustrating a base station device according to one embodiment of the present disclosure.

[0030] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the attached drawings. Furthermore, detailed descriptions of related known functions or configurations will be omitted if they are deemed to unnecessarily obscure the gist of the present disclosure. Furthermore, the terms described below are defined based on their functions in the present disclosure and may vary depending on the intent or custom of the user or operator. Therefore, their definitions should be based on the overall content of this specification.

[0031] The advantages and features of the present disclosure, and methods for achieving them, will become clearer with reference to the embodiments described in detail below together with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below and may be implemented in various different forms. These embodiments are provided solely to ensure that the disclosure of the present disclosure is complete and to fully inform those skilled in the art of the scope of the invention, and the present disclosure is defined only by the scope of the claims. Like reference numerals designate like elements throughout the specification.

[0032] At this time, it will be understood that each block of the processing flowchart drawings and combinations of the flowchart drawings can be performed by computer program instructions. These computer program instructions can be installed in a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing equipment, so that the instructions executed by the processor of the computer or other programmable data processing equipment create a means for performing the functions described in the flowchart block(s). These computer program instructions can also be stored in a computer-available or computer-readable memory that can direct a computer or other programmable data processing equipment to implement the functions in a specific manner, so that the instructions stored in the computer-available or computer-readable memory can also produce a manufactured item that includes an instruction means for performing the functions described in the flowchart block(s). Since the computer program instructions may be installed on a computer or other programmable data processing device, a series of operational steps may be performed on the computer or other programmable data processing device to create a computer-executable process, and the instructions that cause the computer or other programmable data processing device to perform the steps for performing the functions described in the flowchart block(s) may also provide steps for performing the functions described in the flowchart block(s).

[0033] Additionally, each block may represent a module, segment, or portion of code that contains one or more executable instructions for performing a specific logical function(s). It should also be noted that in some alternative implementation examples, the functions described in the blocks may occur out of order. For example, two blocks depicted in succession may actually be executed substantially concurrently, or the blocks may sometimes be executed in reverse order, depending on their respective functions.

[0034] Here, the term '~ part' used in this embodiment means software or hardware components such as FPGA (Field Programmable Gate Array) or ASIC (Application Specific Integrated Circuit), and the '~ part' performs certain roles. However, the '~ part' is not limited to software or hardware. The '~ part' may be configured to be on an addressable storage medium or may be configured to play one or more processors. Therefore, as an example, the '~ part' includes components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The functions provided within the components and '~ parts' may be combined into a smaller number of components and '~ parts' or further separated into additional components and '~ parts'. Additionally, the components and '~parts' may be implemented to activate one or more CPUs within a device or secure multimedia card. In addition, in an embodiment, the '~parts' may include one or more processors.

[0035] In the following description of the present disclosure, detailed descriptions of related known functions or configurations will be omitted if they are deemed to unnecessarily obscure the gist of the present disclosure. Hereinafter, embodiments of the present disclosure will be described with reference to the attached drawings.

[0036] The terms used in the following description to identify connection nodes, terms referring to network entities, terms referring to messages, terms referring to interfaces between network entities, terms referring to various identification information, etc. are provided as examples for convenience of explanation. Therefore, the present disclosure is not limited to the terms described below, and other terms referring to objects with equivalent technical meanings may be used.

[0037] In the following description, the terms "physical channel" and "signal" may be used interchangeably with data or control signals. For example, while PDSCH (physical downlink shared channel) refers to a physical channel through which data is transmitted, PDSCH can also be used to refer to data. That is, in the present disclosure, the expression "transmitting a physical channel" can be interpreted equivalently to the expression "transmitting data or a signal through a physical channel."

[0038] Hereinafter, in the present disclosure, upper signaling refers to a signal transmission method in which a base station transmits a signal to a terminal using a downlink data channel of the physical layer, or a terminal transmits a signal to a base station using an uplink data channel of the physical layer. Upper signaling can be understood as radio resource control (RRC) signaling or a media access control (MAC) control element (CE).

[0039] For the convenience of explanation below, this disclosure uses terms and names defined in the 3rd Generation Partnership Project NR (New Radio) or 3rd Generation Partnership Project Long Term Evolution (LTE) standards. However, this disclosure is not limited by the terms and names, and can be equally applied to systems conforming to other standards. In this disclosure, gNB may be used interchangeably with eNB for the convenience of explanation. That is, a base station described as an eNB may represent a gNB. In addition, the term terminal may represent not only a mobile phone, an MTC device, an NB-IoT device, a sensor, but also other wireless communication devices.

[0040] Hereinafter, a base station is an entity that performs resource allocation of a terminal, and may be at least one of a gNodeB (gNB), an eNode B (eNB), a NodeB, a BS (Base Station), a wireless access unit, a base station controller, or a node on a network. The terminal may include a UE (User Equipment), an MS (Mobile Station), a cellular phone, a smartphone, a computer, or a multimedia system capable of performing a communication function. However, the base station is not limited to the examples above.

[0041] In particular, the present disclosure can be applied to 3GPP NR (5th generation mobile communication standard). Furthermore, the present disclosure can be applied to intelligent services (e.g., smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail, security and safety-related services, etc.) based on 5G communication technology and IoT-related technology. In the present disclosure, eNB may be used interchangeably with gNB for convenience of explanation. That is, a base station described as eNB may represent a gNB. Furthermore, the term "terminal" may refer to not only mobile phones, NB-IoT devices, and sensors, but also other wireless communication devices.

[0042] Wireless communication systems are evolving from providing voice-oriented services in the early days to broadband wireless communication systems that provide high-speed, high-quality packet data services, such as communication standards such as 3GPP's HSPA (High Speed ​​Packet Access), LTE (Long Term Evolution or E-UTRA (Evolved Universal Terrestrial Radio Access)), LTE-Advanced (LTE-A), LTE-Pro, 3GPP2's HRPD (High Rate Packet Data), UMB (Ultra Mobile Broadband), and IEEE's 802.16e.

[0043] As a representative example of a broadband wireless communication system, the LTE system adopts the OFDM (Orthogonal Frequency Division Multiplexing) method in the downlink (DL) and the SC-FDMA (Single Carrier Frequency Division Multiple Access) method in the uplink (UL). The uplink refers to a wireless link in which a terminal (User Equipment; UE or MS; Mobile Station) transmits data or control signals to a base station (eNode B or BS; Base Station), and the downlink refers to a wireless link in which a base station transmits data or control signals to a terminal. This multiple access method distinguishes the data or control information of each user by allocating and operating the time-frequency resources to be transmitted for each user so that they do not overlap, that is, so as to achieve orthogonality.

[0044] As the future communications system beyond LTE, 5G communication systems must be able to freely reflect the diverse needs of users and service providers. Therefore, they must support services that simultaneously satisfy these diverse requirements. Services being considered for 5G communication systems include Enhanced Mobile Broadband (eMBB), Massive Machine Type Communication (mMTC), and Ultra Reliability Low Latency Communication (URLLC).

[0045] In some embodiments, eMBB may aim to provide data rates that are significantly higher than those supported by existing LTE, LTE-A, or LTE-Pro. For example, in a 5G communication system, eMBB should be able to provide a peak data rate of 20 Gbps in the downlink and a peak data rate of 10 Gbps in the uplink from the perspective of a single base station. Furthermore, a 5G communication system may need to provide both the peak data rate and the increased user-perceived data rate of a terminal. To meet these requirements, a 5G communication system may require improvements in various transmission and reception technologies, including improved multi-input, multi-output (MIMO) transmission technology. Furthermore, while current LTE transmits signals using a maximum 20 MHz transmission bandwidth in the 2 GHz band, a 5G communication system can use a wider frequency bandwidth than 20 MHz in the 3-6 GHz or higher 6 GHz band, thereby meeting the data rates required by the 5G communication system.

[0046] At the same time, mMTC is being considered to support application services such as the Internet of Things (IoT) in 5G communication systems. To efficiently provide the IoT, mMTC may require support for large-scale terminal connections within a cell, improved terminal coverage, improved battery life, and reduced terminal costs. The IoT requires the ability to support a large number of terminals (e.g., 1,000,000 terminals / km2) within a cell, as it provides communication capabilities through the attachment of various sensors and devices. Furthermore, due to the nature of the service, terminals supporting mMTC are likely to be located in shadow areas not covered by cells, such as basements, which may require wider coverage than other services provided by 5G communication systems. Terminals supporting mMTC should be comprised of low-cost terminals, and since frequent battery replacement is unlikely, extremely long battery lifespans, such as 10 to 15 years, may be required.

[0047] Finally, URLLC is a cellular-based wireless communication service used for specific purposes (mission-critical), such as remote control of robots or machinery, industrial automation, unmanned aerial vehicles (UAVs), remote health care, and emergency alerts. Therefore, the communication provided by URLLC may need to provide very low latency (ultra-low latency) and very high reliability (ultra-reliability). For example, a service supporting URLLC may have to satisfy an air interface latency of less than 0.5 milliseconds and may also have a requirement for a packet error rate (PER) of 10-5 or less. Therefore, for services supporting URLLC, 5G systems may be required to provide a smaller Transmit Time Interval (TTI) than other services, while simultaneously allocating a wide range of resources in the frequency band to ensure the reliability of the communication link.

[0048] The three services considered in the aforementioned 5G communication system—eMBB, URLLC, and mMTC—can be multiplexed and transmitted in a single system. To meet the differing requirements of each service, different transmission and reception techniques and parameters may be used between the services. However, the aforementioned mMTC, URLLC, and eMBB are merely examples of different service types, and the service types applicable to this disclosure are not limited to the aforementioned examples.

[0049] Furthermore, while the embodiments of the present disclosure are described below using LTE, LTE-A, LTE Pro, or 5G (or NR, next-generation mobile communication) systems as examples, the embodiments of the present disclosure may also be applied to other communication systems with similar technical backgrounds or channel types. Furthermore, the embodiments of the present disclosure may be applied to other communication systems with some modifications, as determined by a person skilled in the art, without significantly departing from the scope of the present disclosure.

[0050] FIG. 1 is a diagram illustrating the structure of an NR system according to one embodiment of the present disclosure.

[0051] Referring to FIG. 1, the wireless communication system may be composed of multiple base stations (e.g., gNB (1-05), ng-eNB (1-10), ng-eNB (1-15), gNB (1-20)), an Access and Mobility Management Function (AMF) (1-25) and a User Plane Function (UPF) (1-30). The wireless communication system is not limited to the configuration illustrated in FIG. 1 and may include more or fewer components. A user equipment (hereinafter referred to as UE or terminal) (1-35) may access an external network through base stations (e.g., gNB (1-05), ng-eNB (1-10), ng-eNB (1-15), gNB (1-20)) and a UPF (1-30).

[0052] In Fig. 1, base stations (e.g., gNB(1-05), ng-eNB(1-10), ng-eNB(1-15), gNB(1-20)) can serve as access nodes of a cellular network and provide wireless access to terminals accessing the network. That is, base stations (e.g., gNB(105), ng-eNB(1-10), ng-eNB(1-15), gNB(1-20)) can collect status information such as buffer status, available transmission power status, and channel status of terminals to schedule and support connections between terminals and a core network (CN; in particular, the CN of NR is referred to as 5GC) in order to service the traffic of users.

[0053] In Fig. 1, gNB (105, 120) can control multiple cells, and an adaptive modulation and coding (AMC) method that determines a modulation scheme and a channel coding rate according to the channel status of the terminal can be applied.

[0054] The core network, which handles various control functions as well as mobility management for terminals, can be connected to multiple base stations. 5GC can also be integrated with existing LTE systems.

[0055] Meanwhile, in a wireless communication system, a user plane (UP) related to transmission of actual user data and a control plane (CP) such as connection management can be configured separately, and gNB (1-05) and gNB (1-20) can use UP and CP technologies defined in NR technology, and ng-eNB (1-10) and ng-eNB (1-15) can use UP and CP technologies defined in LTE (Long Term Evolution) technology even though they are connected to 5GC.

[0056] AMF (1-25) is a device that handles various control functions as well as mobility management functions for terminals and is connected to multiple base stations, while UPF (1-30) may refer to a type of gateway device that provides data transmission. Although not illustrated in Fig. 1, the NR wireless communication system may also include a Session Management Function (SMF). The SMF can manage packet data network connections, such as PDU (protocol data unit) sessions provided to terminals.

[0057] FIG. 2 is a diagram illustrating a wireless protocol structure in an LTE and NR system according to one embodiment of the present disclosure.

[0058] Referring to FIG. 2, the wireless protocol of the LTE system may include Packet Data Convergence Protocol (PDCP) (2-05) (2-40), Radio Link Control (RLC) (2-10) (2-35), and Medium Access Control (MAC) (2-15) (2-30) in the terminal and eNB, respectively.

[0059] PDCP (Packet Data Convergence Protocol) (2-05) (2-40) can handle operations such as IP header compression / decompression, provide sequential or out-of-order transmission functions, rearrange packet order, duplicate detection, retransmission, or encryption and decryption functions. PDCP's functions are not limited to the examples above.

[0060] Radio Link Control (RLC) (2-10) (2-35) can reconfigure PDCP Protocol Data Units (PDUs) to an appropriate size, provide sequential or out-of-sequence transmission functions, and provide ARQ functions, joining, segmentation, reassembly or re-segmentation functions, reordering functions, duplicate detection functions, error detection functions, etc. The functions of RLC are not limited to the examples above.

[0061] MAC(2-15)(2-30) is connected to multiple RLC layer devices configured in a terminal, and performs the operation of multiplexing RLC PDUs into MAC PDUs and demultiplexing RLC PDUs from MAC PDUs. In addition, MAC can provide a mapping function, a scheduling information reporting function, a HARQ function, a priority control function between logical channels, a priority control function between terminals, an MBMS service confirmation function, a transmission format selection function, and a padding function. The functions of MAC are not limited to the examples above.

[0062] The physical (PHY) layer (2-20)(2-25) performs the operation of channel coding and modulating upper layer data, converting it into OFDM symbols and transmitting it over a wireless channel, or demodulating and channel decoding OFDM symbols received over a wireless channel and transmitting them to the upper layer. In addition, the physical layer also uses HARQ (Hybrid ARQ) for additional error correction, and the receiver can transmit with 1 bit whether or not it has received a packet transmitted by the transmitter. This is called HARQ ACK / NACK information. Downlink HARQ ACK / NACK information for uplink data transmission is transmitted through the PHICH (Physical Hybrid-ARQ Indicator Channel) physical channel in the case of LTE, and since NR applies asynchronous HARQ, it can determine whether retransmission is necessary or new transmission can be performed through the scheduling information of the corresponding terminal in the PDCCH (Physical Dedicated Control CHannel), which is a channel through which downlink / uplink resource allocation, etc. are transmitted. Uplink HARQ ACK / NACK information for downlink data transmission can be transmitted through the PUCCH (Physical Uplink Control Channel) or PUSCH (Physical Uplink Shared Channel) physical channel. PUCCH is generally transmitted in the uplink of the PCell, which will be described later, but if the terminal supports it, the base station may additionally transmit it to the SCell, which will be described later, to the terminal, and this is called the PUCCH SCell.

[0063] Although not shown in this drawing, an RRC (Radio Resource Control) layer exists above the PDCP layer of each terminal and base station, and the RRC layer can transmit and receive connection and measurement-related setting control messages for radio resource control.

[0064] Meanwhile, the physical (PHY) layer can be composed of one or more frequencies / carriers, and the technology that sets and uses multiple frequencies simultaneously is called carrier aggregation (CA). CA technology can dramatically increase the transmission capacity by using the primary carrier and one or more secondary carriers (sub carriers) in addition to only one carrier for communication between a terminal (or User Equipment, UE) and a base station (E-UTRAN NodeB, eNB). Meanwhile, in LTE, a cell within a base station that uses a primary carrier is called a primary cell or PCell (Primary Cell), and a cell within a base station that uses a subcarrier is called a subcell or SCell (Secondary Cell).

[0065] Additionally, although not shown in this diagram, the NR wireless protocol may further include the Service Data Adaptation Protocol (SDAP). The SDAP layer may provide functions for transmitting user data, mapping QoS flows and data bearers for uplink and downlink, marking QoS flow IDs for uplink and downlink, and mapping relective QoS flows to data bearers for uplink SDAP PDUs. The operation of SDAP is not limited to the above examples.

[0066] FIG. 3 is a diagram illustrating a network structure for providing terminal location estimation services (LoCation Services, LCS) in a wireless mobile communication system according to one embodiment of the present disclosure.

[0067] Referring to FIG. 3, a network for providing LCS in a wireless mobile communication system may be composed of a terminal (3-00), a base station (NG-RAN Node) (3-05), an Access and Mobility Management Function (AMF) (3-10), and a Location Management Function (LMF) (3-15). At this time, the user terminal (3-00) communicates with the LMF (3-15) through the base station (3-05) and the AMF (3-10), and can transmit and receive information necessary for location estimation. The roles of each entity for providing LCS are, for example, as follows.

[0068] The terminal (UE) (3-00) can measure wireless signals required for location estimation and transmit the results to the LMF (3-15).

[0069] The base station (3-05) can perform roles such as transmitting downlink wireless signals required for location estimation and measuring uplink wireless signals transmitted by a target terminal.

[0070] After receiving an LCS Request message from an LCS requester, the AMF (3-10) can forward it to the LMF (3-15) to instruct the provision of location services. After the LMF (3-15) processes the location estimation request and responds with the terminal's location estimation result, the AMF (3-10) can forward the result to the LCS requester.

[0071] The LMF (3-15) can receive and process the LCS Request from the AMF (3-10), and can play a role in controlling the overall process required for position estimation. For terminal position estimation, the LMF (3-15) can provide the terminal (3-00) with auxiliary information necessary for position estimation and signal measurement, and receive the position estimation result and the position estimation signal measurement result value. At this time, the LTE Positioning Protocol (LPP) can be used as a protocol for data exchange. The LPP can define the message specifications exchanged between the terminal (3-00) and the LMF (3-15) for the position estimation service. In addition, the LMF (3-15) can transmit and receive downlink reference signal (Positioning Reference Signal, PRS) configuration information and uplink reference signal (Sounding Reference Signal, SRS) measurement results to be used for position estimation to and from the base station (3-05). At this time, NRPPa (NR Positioning Protocol A) can be used as a protocol for data exchange, and NRPPa can define the message specifications transmitted and received between the base station (3-05) and the LMF (3-15). The LMF (3-15) can be referred to as an LMF entity as a network entity.

[0072] FIG. 4 is a flowchart of a process for performing LCS in a wireless mobile communication system according to one embodiment of the present disclosure.

[0073] Referring to Fig. 4, AMF (4-05) can transmit LCS Request (4-20a, 4-20b, 4-20c) to LMF (4-07) after receiving it. Thereafter, LMF (4-07) can control the process of exchanging necessary information with terminal and base station to process LCS Request (4-20a, 4-20b, 4-20c) and transmit the result value (position estimation result) to AMF (4-05). LCS execution can be completed when AMF (4-05) transmits the result value (position estimation result) to the target that requested LCS.

[0074] The LCS Request received by AMF (4-05) in operation 4-20 can contain the following three types:

[0075] 1. LCS Request (4-20a) received from an external LCS Client (4-10)

[0076] 2. LCS Request (4-20b) generated by AMF (4-05) itself

[0077] 3. LCS Request (4-20c) received from UE (4-00)

[0078] The LCS Request may include the ID of the LCS target terminal and LCS QoS (Quality of Service) request information (e.g., requirements for location estimation accuracy and delay time).

[0079] After receiving one of the three types of LCS Request, the AMF (4-05) can request the provision of a location estimation service by sending a Location Service Request message (4-25) to the LMF (4-07).

[0080] Afterwards, in the NG-RAN Node Procedure (4-30) step, the LMF (4-07) can perform procedures necessary for location estimation (e.g., base station PRS setting, base station SRS measurement information acquisition, etc.) through NRPPa message exchange with the NG-RAN Node (4-03).

[0081] Additionally, in the UE Procedure step (4-35), the LMF (4-07) can transmit and receive LPP messages to exchange necessary information elements with the terminal (4-00). For example, the LMF (4-07) can receive terminal capability (UE Capability) information related to position estimation, and perform procedures such as transmitting auxiliary information for terminal signal measurement, requesting and obtaining terminal measurement results, etc.

[0082] When the estimated location of the terminal is determined based on the various measurement results acquired by the LMF (4-07), the LMF (4-07) can transmit a Location Service Response message (4-40) to the AMF (4-05).

[0083] AMF (4-05) can deliver an LCS Response message (4-45a, 4-45b, 4-45c) to the target that requested LCS, and the LCS Response message (4-45a, 4-45b, 4-45c) can include the terminal position estimation result.

[0084] The names of requests or messages described in this disclosure are not limited to the names described in this disclosure, and may be expressed by other names based on the characteristics or nature of the requests or messages, etc. Alternatively, they may be expressed as a first request (or message), a second request (or message), etc.

[0085] FIG. 5 is a flowchart of an LPP (LTE Positioning Protocol) message exchange process between a terminal and an LMF (Location Management Function) according to one embodiment of the present disclosure.

[0086] Referring to FIG. 5, the detailed LPP (LTE Positioning Protocol) message exchange process in the UE Procedure operation (4-35) in FIG. 4 is illustrated. For example, procedures such as exchanging terminal capability information (UE Capability) related to position estimation between the LMF (5-05) and the terminal (5-00), transmitting auxiliary information for terminal signal measurement, and requesting and obtaining terminal measurement results can be performed. The purpose and definition of each LPP message exchanged in each operation are as follows, for example.

[0087] LPP Request Capabilities (LMF -> UE, 5-10): LMF (5-05) can be used to request UE Capability information elements related to position estimation from the terminal (5-00). The information included in the message can be defined, for example, as shown in Table 1. A request for common information regardless of the position estimation method (e.g., GNSS (Global Navigation Satellite System), OTDOA (Observed Time Difference of Arrival), ECID (Enhanced Cell Identity), etc.) is included in a given message (e.g., CommonIEsRequestCapabilities), and a request for additional information required for each position estimation method can be included in a separate parameter or IE (Information Element) for each method.

[0088] RequestCapabilities ::= SEQUENCE {criticalExtensions CHOICE {c1 CHOICE {requestCapabilities-r9 RequestCapabilities-r9-IEs,spare3 NULL, spare2 NULL, spare1 NULL},criticalExtensionsFuture SEQUENCE {}}}RequestCapabilities-r9-IEs ::= SEQUENCE {commonIEsRequestCapabilities CommonIEsRequestCapabilities OPTIONAL, -- Need ONa-gnss-RequestCapabilities A-GNSS-RequestCapabilities OPTIONAL, -- Need ONotdoa-RequestCapabilities OTDOA-RequestCapabilities OPTIONAL, -- Need ONecid-RequestCapabilities ECID-RequestCapabilities OPTIONAL, -- Need ONepdu-RequestCapabilities EPDU-Sequence OPTIONAL, -- Need ON...,[[ sensor-RequestCapabilities-r13 Sensor-RequestCapabilities-r13 OPTIONAL, -- Need ONtbs-RequestCapabilities-r13 TBS-RequestCapabilities-r13 OPTIONAL, -- Need ONwlan-RequestCapabilities-r13 WLAN-RequestCapabilities-r13 OPTIONAL, -- Need ONbt-RequestCapabilities-r13 BT-RequestCapabilities-r13 OPTIONAL -- Need ON]],[[ nr-ECID-RequestCapabilities-r16 NR-ECID-RequestCapabilities-r16 OPTIONAL, -- Need ONnr-Multi-RTT-RequestCapabilities-r16NR-Multi-RTT-RequestCapabilities-r16OPTIONAL, -- Need ONnr-DL-AoD-RequestCapabilities-r16NR-DL-AoD-RequestCapabilities-r16 OPTIONAL, -- Need ONnr-DL-TDOA-RequestCapabilities-r16NR-DL-TDOA-RequestCapabilities-r16 OPTIONAL, -- Need ONnr-UL-RequestCapabilities-r16 NR-UL-RequestCapabilities-r16 OPTIONAL -- Need ON]]}.

[0089] LPP Provide Capabilities (UE -> LMF, 5-15): This can be used by the terminal (5-00) to transmit UE Capability information elements requested from the LMF (5-05). The information included in the message can be defined, for example, as shown in Table 2. Similar to the LPP Request Capabilities message, common information regardless of the location estimation method is included in commonIEsProvideCapabilities, and information elements requested for each location tracking method can be included in a separate parameter or IE.

[0090] ProvideCapabilities ::= SEQUENCE {criticalExtensions CHOICE {c1 CHOICE {provideCapabilities-r9 ProvideCapabilities-r9-IEs,spare3 NULL, spare2 NULL, spare1 NULL},criticalExtensionsFuture SEQUENCE {}}}ProvideCapabilities-r9-IEs ::= SEQUENCE {commonIEsProvideCapabilities CommonIEsProvideCapabilities OPTIONAL,a-gnss-ProvideCapabilities A-GNSS-ProvideCapabilities OPTIONAL,otdoa-ProvideCapabilities OTDOA-ProvideCapabilities OPTIONAL,ecid-ProvideCapabilities ECID-ProvideCapabilities OPTIONAL,epdu-ProvideCapabilities EPDU-Sequence OPTIONAL,...,[[ sensor-ProvideCapabilities-r13 Sensor-ProvideCapabilities-r13 OPTIONAL,tbs-ProvideCapabilities-r13 TBS-ProvideCapabilities-r13 OPTIONAL,wlan-ProvideCapabilities-r13 WLAN-ProvideCapabilities-r13 OPTIONAL,bt-ProvideCapabilities-r13 BT-ProvideCapabilities-r13 OPTIONAL]],[[ nr-ECID-ProvideCapabilities-r16 NR-ECID-ProvideCapabilities-r16 OPTIONAL,nr-Multi-RTT-ProvideCapabilities-r16NR-Multi-RTT-ProvideCapabilities-r16 OPTIONAL,nr-DL-AoD-ProvideCapabilities-r16NR-DL-AoD-ProvideCapabilities-r16 OPTIONAL,nr-DL-TDOA-ProvideCapabilities-r16NR-DL-TDOA-ProvideCapabilities-r16 OPTIONAL,nr-UL-ProvideCapabilities-r16 NR-UL-ProvideCapabilities-r16 OPTIONAL]]}.

[0091] LPP requestAssistanceData (UE -> LMF, 5-17): This message can be used by a terminal (5-00) to request information elements necessary or helpful for measuring radio signals for location estimation from the LMF (5-05). The information contained in the message can be defined, for example, as shown in Table 3. Common information regardless of the location estimation method is included in commonIEsRequestAssistanceData, and information elements requested for each location tracking method can be included in separate parameters or IEs. Meanwhile, the LPP requestAssistanceData message may not be transmitted in some cases.

[0092] RequestAssistanceData ::= SEQUENCE {criticalExtensions CHOICE {c1 CHOICE {requestAssistanceData-r9 RequestAssistanceData-r9-IEs,spare3 NULL, spare2 NULL, spare1 NULL},criticalExtensionsFuture SEQUENCE {}}}RequestAssistanceData-r9-IEs ::= SEQUENCE {commonIEsRequestAssistanceData CommonIEsRequestAssistanceData OPTIONAL,a-gnss-RequestAssistanceData A-GNSS-RequestAssistanceData OPTIONAL,otdoa-RequestAssistanceData OTDOA-RequestAssistanceData OPTIONAL,epdu-RequestAssistanceData EPDU-Sequence OPTIONAL,...,[[ sensor-RequestAssistanceData-r14Sensor-RequestAssistanceData-r14 OPTIONAL,tbs-RequestAssistanceData-r14 TBS-RequestAssistanceData-r14 OPTIONAL,wlan-RequestAssistanceData-r14 WLAN-RequestAssistanceData-r14 OPTIONAL]],[[ nr-Multi-RTT-RequestAssistanceData-r16 NR-Multi-RTT-RequestAssistanceData-r16 OPTIONAL,nr-DL-AoD-RequestAssistanceData-r16 NR-DL-AoD-RequestAssistanceData-r16 OPTIONAL,nr-DL-TDOA-RequestAssistanceData-r16 NR-DL-TDOA-RequestAssistanceData-r16 OPTIONAL]]}

[0093] LPP ProvideAssistanceData (LMF -> UE, 5-20): This can be used by the LMF (5-05) to provide information elements necessary or helpful for the terminal (5-00) to measure radio signals for location estimation. The information contained in the message can be defined, for example, as shown in Table 4. Common information regardless of the location estimation method is included in commonIEsProvideAssistanceData, and information elements provided for each location tracking method can be included in separate parameters or IEs.

[0094] ProvideAssistanceData ::= SEQUENCE {criticalExtensions CHOICE {c1 CHOICE {provideAssistanceData-r9 ProvideAssistanceData-r9-IEs,spare3 NULL, spare2 NULL, spare1 NULL},criticalExtensionsFuture SEQUENCE {}}}ProvideAssistanceData-r9-IEs ::= SEQUENCE {commonIEsProvideAssistanceData CommonIEsProvideAssistanceData OPTIONAL, -- Need ONa-gnss-ProvideAssistanceData A-GNSS-ProvideAssistanceData OPTIONAL, -- Need ONotdoa-ProvideAssistanceData OTDOA-ProvideAssistanceData OPTIONAL, -- Need ONepdu-Provide-Assistance-Data EPDU-Sequence OPTIONAL, -- Need ON...,[[sensor-ProvideAssistanceData-r14 Sensor-ProvideAssistanceData-r14 OPTIONAL, -- Need ONtbs-ProvideAssistanceData-r14 TBS-ProvideAssistanceData-r14 OPTIONAL, -- Need ONwlan-ProvideAssistanceData-r14 WLAN-ProvideAssistanceData-r14 OPTIONAL -- Need ON]],[[ nr-Multi-RTT-ProvideAssistanceData-r16NR-Multi-RTT-ProvideAssistanceData-r16OPTIONAL, -- Need ONnr-DL-AoD-ProvideAssistanceData-r16NR-DL-AoD-ProvideAssistanceData-r16 OPTIONAL, -- Need ONnr-DL-TDOA-ProvideAssistanceData-r16NR-DL-TDOA-ProvideAssistanceData-r16OPTIONAL -- Need ON]]}.

[0095] LPP Request Location Information (LMF -> UE, 5-25): The LMF (5-05) can be used to request the terminal (5-00) for signal measurements and location estimation results necessary for location estimation. The LMF (5-05) can determine which location estimation method to use, which measurements the terminal should perform for this, and how to respond with which results, and then include relevant information elements in the message and transmit them to the terminal (5-00). The information included in the message can be defined, for example, as shown in Table 5.

[0096] RequestLocationInformation ::= SEQUENCE {criticalExtensions CHOICE {c1 CHOICE {requestLocationInformation-r9 RequestLocationInformation-r9-IEs,spare3 NULL, spare2 NULL, spare1 NULL},criticalExtensionsFuture SEQUENCE {}}}RequestLocationInformation-r9-IEs ::= SEQUENCE {commonIEsRequestLocationInformationCommonIEsRequestLocationInformation OPTIONAL, -- Need ONa-gnss-RequestLocationInformation A-GNSS-RequestLocationInformation OPTIONAL, -- Need ONotdoa-RequestLocationInformation OTDOA-RequestLocationInformation OPTIONAL, -- Need ONecid-RequestLocationInformation ECID-RequestLocationInformation OPTIONAL, -- Need ONepdu-RequestLocationInformation EPDU-Sequence OPTIONAL, -- Need ON...,[[sensor-RequestLocationInformation-r13Sensor-RequestLocationInformation-r13OPTIONAL, -- Need ONtbs-RequestLocationInformation-r13 TBS-RequestLocationInformation-r13 OPTIONAL, -- Need ONwlan-RequestLocationInformation-r13 WLAN-RequestLocationInformation-r13 OPTIONAL, -- Need ONbt-RequestLocationInformation-r13 BT-RequestLocationInformation-r13 OPTIONAL -- Need ON]],[[ nr-ECID-RequestLocationInformation-r16NR-ECID-RequestLocationInformation-r16OPTIONAL, -- Need ONnr-Multi-RTT-RequestLocationInformation-r16NR-Multi-RTT-RequestLocationInformation-r16OPTIONAL, -- Need ONnr-DL-AoD-RequestLocationInformation-r16NR-DL-AoD-RequestLocationInformation-r16OPTIONAL, -- Need ONnr-DL-TDOA-RequestLocationInformation-r16NR-DL-TDOA-RequestLocationInformation-r16OPTIONAL -- Need ON]]}.

[0097] LPP Provide Location Information (UE -> LMF, 5-30): This message can be used by the UE (5-00) to transmit measurement results and location estimation results requested from the LMF (5-05) to the LMF (5-05). The information contained in the message can be defined, for example, as shown in Table 6.

[0098] ProvideLocationInformation ::= SEQUENCE {criticalExtensions CHOICE {c1 CHOICE {provideLocationInformation-r9 ProvideLocationInformation-r9-IEs,spare3 NULL, spare2 NULL, spare1 NULL},criticalExtensionsFuture SEQUENCE {}}}ProvideLocationInformation-r9-IEs ::= SEQUENCE {commonIEsProvideLocationInformationCommonIEsProvideLocationInformation OPTIONAL,a-gnss-ProvideLocationInformation A-GNSS-ProvideLocationInformation OPTIONAL,otdoa-ProvideLocationInformation OTDOA-ProvideLocationInformation OPTIONAL,ecid-ProvideLocationInformation ECID-ProvideLocationInformation OPTIONAL,epdu-ProvideLocationInformation EPDU-Sequence OPTIONAL,...,[[sensor-ProvideLocationInformation-r13Sensor-ProvideLocationInformation-r13OPTIONAL,tbs-ProvideLocationInformation-r13 TBS-ProvideLocationInformation-r13 OPTIONAL,wlan-ProvideLocationInformation-r13 WLAN-ProvideLocationInformation-r13 OPTIONAL,bt-ProvideLocationInformation-r13 BT-ProvideLocationInformation-r13 OPTIONAL]],[[ nr-ECID-ProvideLocationInformation-r16NR-ECID-ProvideLocationInformation-r16 OPTIONAL,nr-Multi-RTT-ProvideLocationInformation-r16NR-Multi-RTT-ProvideLocationInformation-r16 OPTIONAL,nr-DL-AoD-ProvideLocationInformation-r16NR-DL-AoD-ProvideLocationInformation-r16 OPTIONAL,nr-DL-TDOA-ProvideLocationInformation-r16NR-DL-TDOA-ProvideLocationInformation-r16 OPTIONAL]]}.

[0099] The names of requests or messages described in this disclosure are not limited to the names described in this disclosure, and may be expressed by other names based on the characteristics or properties of the requests or messages, etc.

[0100] FIG. 6 is a diagram illustrating a process for setting up a terminal's SRS (Sounding Reference Signal) transmission for location estimation according to an embodiment of the present disclosure.

[0101] Referring to FIG. 6, a procedure is illustrated for setting up SRS (Sounding Reference Signal) transmission required for UE (6-01) to perform at least one operation among UL positioning method or DL+UL positioning method by LMF (6-04). The steps illustrated in FIG. 6 are not necessarily all included depending on system settings and / or definitions, and some steps may be omitted.

[0102] The above UL positioning method may refer to a method of estimating the location of a terminal based on an uplink signal transmitted by the terminal. For example, it may include a method of estimating the location of the terminal based on SRS measurement information (or measured result value) obtained by a gNB / TRP (transmission reception point) that receives (or measures) the SRS signal transmitted by the terminal and transmits an SRS signal via uplink.

[0103] The above DL+UL positioning method may refer to a method of estimating the position of a terminal based on a downlink signal transmitted by a gNB / TRP and an uplink signal transmitted by a terminal. For example, the gNB / TRP may transmit a PRS (Positioning Reference Signal) via downlink. A terminal that receives the PRS transmitted by the gNB / TRP may obtain PRS measurement information (or a measured result value). For example, a terminal may transmit an SRS signal via uplink, and a gNB / TRP that receives (or measures) the SRS signal transmitted by the terminal may obtain SRS measurement information (or a measured result value). Thereafter, the PRS measurement information (or measured result value) measured by the terminal and the SRS measurement information (or measured result value) measured by the gNB / TRP may be used together to estimate the position of the terminal.

[0104] Therefore, in order to estimate the location of a terminal using at least one of the UL positioning method or the UL+DL positioning method, a procedure for configuring the terminal to transmit SRS must be performed. The procedures performed at each step will be described below.

[0105] In step 6-05, LMF (6-04) can exchange NRPPa TRP configuration information with Serving gNB / TRP (6-02) and Neighbor gNB / TRP (6-03). (NRPPa TRP Configuration Information Exchange)

[0106] The LMF (6-04) can obtain information necessary for performing the UL positioning method from the Serving gNB / TRP (6-02) and the Neighbor gNB / TRP (6-03). The information necessary for performing the UL positioning method can include at least one of NR cell information, PRS configuration, Spatial Direction information, and location information.

[0107] In steps 6-10, capability information can be exchanged between LMP (6-04) and UE (6-01). (LPP Capability Transfer)

[0108] LMF (6-04) can request terminal capability information related to location estimation from UE (6-02) and receive a response.

[0109] In step 6-15, the LMF (6-04) can send an NRPPa positioning information request message to the Serving gNB / TRP (6-02). (NRPPa POSITIONING INFORMATION REQUEST)

[0110] The NRPPa positioning information request message transmitted by the LMF (6-04) may include information for requesting the Serving gNB / TRP (6-02) to determine the SRS transmission resource configuration of the UE required for UL positioning based on information previously collected by the LMF (e.g., location information of adjacent TRPs, existing location information of the UE, SSB / PRS transmission information of the TRPs, etc.). The message may include information on at least one of the number of required SRS resources, periodicity, pathloss reference, and spatial relation.

[0111] In step 6-20, the Serving gNB / TRP (6-02) can finally determine the SRS resources for the UE to transmit SRS. (gNB Determines UL SRS Resources)

[0112] After the Serving gNB / TRP (6-02) receives the NRPPa positioning information request message from the LMF (6-04), it can finally determine the SRS resources to be set for the UE based on the received message.

[0113] In step 6-25, the Serving gNB / TRP (6-02) can transmit the SRS resource configuration information (or SRS resource transmission configuration information, UE SRS configuration) determined in step 6-20 to the UE (6-01). (UE SRS configuration)

[0114] The above Serving gNB / TRP (6-02) can transmit the SRS resource configuration information to the UE (6-01) via RRC signaling.

[0115] In step 6-30, the Serving gNB / TRP (6-02) may transmit an NRPPa positioning information response message to the LMF (6-04). (NRPPa POSITIONING INFORMATION RESPONSE)

[0116] The NRPPa positioning information response message transmitted by the Serving gNB / TRP (6-02) can be used to transmit the SRS resource configuration information (e.g., time / frequency axis position of the SRS resource, period, spatial relation information, etc.) finally transmitted to the UE (6-01) in step 6-25 to the LMF.

[0117] In step 6-35, the LMF (6-04) may transmit an NRPPa POSITIONING ACTIVATION request message to the Serving gNB / TRP (6-02). (NRPPa POSITIONING ACTIVATION REQUEST)

[0118] The above NRPPa POSITIONING ACTIVATION request message can be used by the LMF (6-04) to request the Serving gNB / TRP (6-02) to activate SRS transmission of the UE (6-01) when the UE (6-02) is configured to transmit semi-persistent SRS or aperiodic SRS.

[0119] In step 6-40, the Serving gNB / TRP (6-02) can be configured to activate SRS transmission to the UE (6-01). (Activate UE SRS transmission)

[0120] The Serving gNB / TRP (6-02) that receives the above NRPPa POSITIONING ACTIVATION REQUEST message can instruct the UE (6-40) to activate SRS through MAC (medium access control) CE (control element) or DCI (downlink control information).

[0121] In step 6-45, the Serving gNB / TRP (6-02) may transmit an NRPPa POSITIONING ACTIVATION RESPONSE message to the UE (6-01). (NRPPA POSITIONING ACTIVATION RESPONSE)

[0122] The above NRPPa POSITIONING ACTIVATION RESPONSE message is a response to the NRPPa POSITIONING ACTIVATION REQUEST message, and can be used by the Serving gNB / TRP (6-02) to transmit information on whether SRS activation is complete (or whether SRS activation is complete) to the LMF (6-04).

[0123] In step 6-55, the LMF (6-04) can transmit an NRPPa MEASUREMENT REQUEST message. (NRPPa MEASUREMENT REQUEST)

[0124] The above NRPPa MEASUREMENT REQUEST message can be used by the LMF (6-04) to request the Serving gNB / TRP (6-02) and the Neighboring gNB / TRP (6-03) to measure the SRS transmitted by the UE and report the results. At this time, the NRPPa MEASUREMENT REQUEST message can also include SRS resource information set for the UE (6-01).

[0125] In steps 6-60, the Serving gNB / TRP (6-02) and the Neighboring gNB / TRP (6-03) can measure the SRS transmitted by the UE (6-01). (UL SRS Measurements)

[0126] The Serving gNB / TRP (6-02) and Neighboring gNB / TRP (6-03) that have received a request for SRS measurement from the LMF (6-04) through the NRPPa MEASUREMENT REQUEST message can measure the SRS transmitted by the UE (6-01) based on the SRS configuration information included in the NRPPa MEASUREMENT REQUEST message.

[0127] In step 6-65, the Serving gNB / TRP (6-02) and the Neighboring gNB / TRP (6-03) may transmit an NRPPa MEASUREMENT RESPONSE message to the LMF (6-04). (NRPPa MEASUREMENT RESPONSE)

[0128] The above NRPPa MEAUREMENT RESPONSE message can be used by the Serving gNB / TRP (6-02) and Neighboring gNB / TRP (6-03) that received a request for SRS measurement from the LMF (6-04) in step 6-55 described above to transmit the SRS measurement result to the LMF (6-04).

[0129] In step 6-70, the LMF (6-04) may transmit an NRPPa POSITIONING DEACTIVATION message to the Serving gNB / TRP (6-02). (NRPPa POSITIONING DEACTIVATION)

[0130] The above NRPPa POSITIONING DEACTIVATION message may be transmitted to the Serving gNB / TRP (6-02) to deactivate the SRS transmission requested in step 6-35 after the LMF (6-04) completes the position estimation technique operation.

[0131] FIG. 7 is a diagram illustrating a scenario for estimating the location of a terminal based on UL-SRS transmitted by the terminal according to one embodiment of the present disclosure.

[0132] Referring to FIG. 7, a terminal (7-00) can transmit UL-SRS (7-11, 7-12, 7-13) to different TRPs (7-03, 7-05, 7-07), respectively. At this time, the timing information (reception time information) at which each TRP receives the UL-SRS is reported to the LMF, and the LMF can use it to estimate the location of the corresponding terminal. For example, if a location estimation method using the UL-TDOA (Up Link Time Difference Of Arrival) method is used, the difference value (RSTD, Reference Signal Timing Difference) between the times at which each TRP receives the UL-SRS simultaneously transmitted by the terminal can be measured and calculated in the LMF. As in the present embodiment, three RSTD values ​​can be measured and calculated for each TRP pair that receives the UL-SRS transmitted by the terminal to three different TRPs. Afterwards, a hyperbola (7-15) can be created by connecting the locations where the corresponding RSTD value can be measured for each RSTD value, and it can be estimated that the terminal is located within the area where the three hyperbolas (7-15) overlap.

[0133] Techniques for estimating the location of a terminal using timing information of when different TRPs receive UL-SRSs transmitted by the terminal include UL-TDOA and Multi-RTT. In the case of the Multi-RTT technique, the location of the terminal is estimated using the RTT (round trip time) value measured through the process in which the terminal receives the DL-PRS transmitted by the TRP and the TRP receives the UL-SRS transmitted by the terminal. In this case, a circle is created by connecting the locations where the RTT value can be measured based on the measured RTT value between each TRP and the terminal, and the terminal can be estimated to be located within the area where multiple circles overlap. In the case of UL-TDOA and Multi-RTT methods, the location of the terminal is estimated based on the timing information when the TRP receives the UL-SRS signal transmitted by the terminal for location estimation. Therefore, the accuracy of the location estimation can be affected by how accurately the TRP detects the UL-SRS signal while receiving the wireless signal and how precisely it measures the detection timing. In addition, this UL-SRS detection performance and detection timing measurement precision can be further improved when the UL-SRS is transmitted using a wider bandwidth. Therefore, in order to improve the location estimation accuracy of the terminal, UL-PRSs transmitted through different carriers (or serving cells) can be aggregated. The method of aggregating UL-PRSs will be described in more detail in FIG. 1 h below.

[0134] FIG. 8 is a diagram illustrating a scenario in which different UL-SRSs transmitted on different carriers (or serving cells) are combined according to one embodiment of the present disclosure.

[0135] Referring to Fig. 8, when using position estimation techniques based on UL-SRS reception time (UL-TDOA, Multi-RTT, etc.), different UL-SRSs transmitted from different (or serving cells) can be aggregated to improve position estimation accuracy. When UL-SRSs transmitted from different (or serving cells) are aggregated, the TRP can recognize the UL-SRSs as a single UL-SRS combined in the frequency domain, detect the UL-SRS, and measure the detection time.

[0136] For example, when UL-SRS1(8-01) of sequence length N is transmitted using bandwidth #1 on Carrier X and UL-SRS2(8-02) of sequence length Y is transmitted using bandwidth #2 on Carrier Y, UL-SRS1(8-01) and UL-SRS2(8-02) can be aggregated. When UL-SRS1 and UL-SRS2 are aggregated, TRP can perform joint measurement (or aggregated measurement) on UL-SRS1 and UL-SRS2. When TRP performs joint measurement for UL-SRS1 (8-01) and UL-SRS2 (8-02), TRP recognizes UL-SRS1 and UL-SRS2 as one UL-SRS having length N+M and transmitted using bandwidth of Bandwidth #1 + Bandwidth #2, and can perform UL-SRS detection and detection point measurement.

[0137] In general, the wider the bandwidth a wireless signal is transmitted using in the frequency domain, the higher the resolution in the time domain. Therefore, when the TRP performs joint measurement on the aggregated UL-SRS1 and UL-SRS2, the TRP can measure the detection point of the aggregated UL-SRS more precisely. Furthermore, in general, the longer the sequence length of the RS (Reference Signal), the better the performance of the TRP in detecting the RS in the wireless signal received. Therefore, by aggregating different UL-SRS transmitted on different carriers, the position estimation accuracy can be improved when using position estimation techniques based on the UL-SRS reception point (such as UL-TDOA and Multi-RTT). For ease of explanation, the operation of aggregating different UL-SRS transmitted on different carriers for the purpose of improving positioning accuracy is abbreviated as 'UL-SRS BW aggregation'. And the aggregated UL-SRSs are expressed as 'aggregated UL-SRS', and the carriers on which the aggregated UL-SRSs are transmitted are expressed as 'aggregated carriers'.

[0138] In order to measure different UL-SRSs transmitted on different carriers as a single UL-SRS after aggregation in the frequency domain, the distance (8-05, Guard size) between resources transmitting the UL-SRSs to be aggregated in the frequency domain can be guaranteed to be below a certain level (e.g., 12 Resource Elements). UL-SRS BW aggregation can be performed for two or more consecutive carriers (e.g., 2 or 3) located within the same band in the frequency domain. In addition, aggregation can be performed for UL-SRS resources that satisfy certain conditions.

[0139] According to one embodiment of the present disclosure, the conditions of UL-SRS resources for performing aggregation may be, for example, one or a combination of the following.

[0140] - UL-SRS resources can be located in the same slot and symbol in the time domain.

[0141] - UL-SRS resources can have the same periodicity and slot offset.

[0142] - UL-SRS resources can have the same muting pattern.

[0143] - UL-SRS resources can have the same NR-UL-SRS-SFN0-Offset value.

[0144] - UL-SRS resources can be transmitted from the same terminal through the same ARP (Antenna Reference Point) and the same RF chain.

[0145] - UL-SRS resources can be transmitted over the same number of symbols.

[0146] - UL-SRS resources can have the same repetition factor value.

[0147] - UL-SRS resources can be transmitted using the same numerology (same Cyclic Prefix, same Sub-Carrier Spacing).

[0148] - UL-SRS resources can be transmitted over the same or different bandwidths.

[0149] - UL-SRS resources can have the same comb size.

[0150] - UL-SRS resources can have the same per-subcarrier transmission power.

[0151] - UL-SRS resources can ensure phase continuity between aggregated carriers.

[0152] FIG. 9 is a flowchart of a signaling process for using UL-SRS BW aggregation for estimating the location of a terminal according to one embodiment of the present disclosure.

[0153] Referring to FIG. 9, the UE (9-01) can report UE capability information related to the UL-SRS BW aggregation operation to the serving gNB (9-02) and the LMF (9-04). If the LMF (9-04) determines that the UL-PRS BW aggregation operation is necessary, it can request (9-15) the serving gNB (9-02) to aggregate UL-SRS resources transmitted by the UE (9-01) for location estimation, while providing specific requirements related thereto. Thereafter, the serving gNB (9-02) can determine (9-20) the aggregated UL-SRS resources to be allocated to the UE (9-01) and provide transmission configuration information (9-25, 9-30) for the aggregated UL-SRS resources to the UE (9-01) and the LMF (9-04). Afterwards, the LMF (9-04) can request (9-35) the serving gNB (9-02) to enable aggregated UL-SRS transmission for the UE. The serving gNB (9-02) can instruct the UE to enable aggregated UL-SRS transmission (9-40) according to the LMF request and report the result to the LMF (9-45). Afterwards, the LMF (9-04) can instruct the TRPs (9-02, 9-03) to perform joint measurement (or aggregated measurement) for the aggregated UL-SRS resources transmitted by the UE (9-55). At this time, the TRPs can perform joint measurement (9-60) according to the instruction of the LMF (9-04) and report the result value (e.g., UL-SRS reception time, etc.) to the LMF (9-65). When the position estimation procedure for the UE is completed, the LMF may request (9-70) the serving gNB (9-02) to deactivate aggregated UL-SRS transmission for the UE.The serving gNB may instruct the UE to disable aggregated UL-SRS transmission (9-75) based on the LMF request. The specific signaling procedures for this operation may be described as follows.

[0154] The steps illustrated in Fig. 9 do not necessarily have to be included entirely, and some steps may be omitted, depending on the settings and / or definitions on the system.

[0155] In step 9-05, LMF (9-04) can exchange NRPPa TRP configuration information with Serving gNB / TRP (9-02) and Neighbor gNB / TRP (9-03). (NRPPa TRP Configuration Information Exchange)

[0156] The LMF (9-04) can obtain information necessary for performing the UL positioning method from the Serving gNB / TRP (9-02) and the Neighbor gNB / TRP (9-03). The information necessary for performing the UL positioning method can include at least one of NR cell information, PRS configuration, Spatial Direction information, and location information.

[0157] In step 9-09, UE capability information may be exchanged between the UE (9-01) and the Serving gNB / TRP (9-02). At this time, the UE (9-01) may provide the serving base station (9-02) with at least one combination of the following UE capability information related to the UL-SRS BW aggregation operation for location estimation.

[0158] ● Support of UL-SRS aggregation: A 1-bit indicator indicating whether or not Aggregated UL-SRS transmission can be performed for Aggregated UL-SRS resources. The aggregated UL-SRS transmission may refer to an operation of aggregating and transmitting different UL-SRS resources transmitted from different Carriers (or serving cells). The indicator may be defined in a format such as nr-UL-SRS-AggregatedTransSupport ENUMERAGED { supported}.

[0159] ● The maximum number of Carriers used for aggregation: An indicator indicating the maximum number of Carriers that can be used for UL-SRS BW aggregation. For example, the indicator may indicate how many Carriers (or serving cells) the UE can perform Aggregated UL-SRS transmission for aggregated UL-SRS transmitted from at most. The indicator may be defined in a format such as maxSupportedAggregatedCarriers INTEGER(2..3), and may be defined and set per UE, Band, or aggregated Carrier combination.

[0160] ● The maximum aggregated bandwidth: An indicator indicating the maximum bandwidth size that can be used for UL-SRS BW aggregation operation. For example, the indicator may indicate the maximum bandwidth size that a UE can perform Aggregated UL-SRS transmission for aggregated UL-SRS. The indicator may be defined in the form of supportedBandwidthAggregationSRS ENUMERATED {mhz50, mhz100, mhz150, mhz200, mhz400, mhz800…} (wherein, 'mhz50' may mean 50 MHz, 'mhz100' may mean 100 MHz, and the same applies hereinafter), and may be defined and set in units of a combination of UE, Band, or aggregated Carrier.

[0161] ● The maximum number of SRS resources processed in a slot over the aggregation: An indicator indicating the maximum number of Aggregated UL-SRS resources that a UE can process (or transmit) per slot. The indicator can be defined in the form of maxNumOfAggregatedUL-SRS-ResProcessedPerSlot ENUMERATED {n1, n2, n4, n8, n16, n24, n32, n48, n64} (where 'n1' can mean one resource, 'n2' can mean two resources, and the same applies hereinafter), and can be defined and set in units of a combination of UE, Band, or aggregated Carrier.

[0162] In steps 9-10, capability information can be exchanged between the LMF (9-04) and the UE (9-01). (LPP Capability Transfer)

[0163] LMF (9-04) may request terminal capability information related to location estimation from UE (9-02) and receive a response. At this time, terminal (9-01) may provide LMF (9-04) at least one combination of the following terminal capability information related to UL-SRS BW aggregation operation for location estimation.

[0164] ● Support of UL-SRS aggregation: A 1-bit indicator indicating whether or not Aggregated UL-SRS transmission can be performed for Aggregated UL-SRS resources. The aggregated UL-SRS transmission may refer to an operation of aggregating and transmitting different UL-SRS resources transmitted from different Carriers (or serving cells). The indicator may be defined in a format such as nr-UL-SRS-AggregatedTransSupport ENUMERAGED { supported}.

[0165] ● The maximum number of Carriers used for aggregation: An indicator indicating the maximum number of Carriers that can be used for UL-SRS BW aggregation. For example, the indicator may indicate how many Carriers (or serving cells) the UE can perform Aggregated UL-SRS transmission for aggregated UL-SRS transmitted from at most. The indicator may be defined in a format such as maxSupportedAggregatedCarriers INTEGER(2..3), and may be defined and set per UE, Band, or aggregated Carrier combination.

[0166] ● The maximum aggregated bandwidth: An indicator indicating the maximum bandwidth size that can be used for UL-SRS BW aggregation operation. For example, the indicator may indicate the maximum bandwidth size that a UE can perform Aggregated UL-SRS transmission for aggregated UL-SRS. The indicator may be defined in the form of supportedBandwidthAggregationSRS ENUMERATED {mhz50, mhz100, mhz150, mhz200, mhz400, mhz800…} (wherein, ‘mhz50’ may mean 50 MHz, ‘mhz100’ may mean 100 MHz, and the same applies hereinafter), and may be defined and set in units of a combination of UE, Band, or aggregated Carrier.

[0167] ● The maximum number of SRS resources processed in a slot over the aggregation: An indicator indicating the maximum number of Aggregated UL-SRS resources that a UE can process (or transmit) per slot. The indicator can be defined in the form of maxNumOfAggregatedUL-SRS-ResProcessedPerSlot ENUMERATED {n1, n2, n4, n8, n16, n24, n32, n48, n64} (where 'n1' can mean one resource, 'n2' can mean two resources, and the same applies hereinafter), and can be defined and set in units of a combination of UE, Band, or aggregated Carrier.

[0168] In step 9-15, the LMF (9-04) can send an NRPPa positioning information request message to the Serving gNB / TRP (9-02). (NRPPa POSITIONING INFORMATION REQUEST)

[0169] The NRPPa positioning information request message transmitted by the LMF (9-04) may include information for requesting the Serving gNB / TRP (9-02) for SRS transmission resources of the UE required for UL positioning determined based on information previously collected by the LMF (e.g., location information of neighboring TRPs, existing location information of the UE, SSB / PRS transmission information of the TRPs, etc.). The message may include information on at least one of the number of required SRS resources, periodicity, pathloss reference, and spatial relation. In addition, when the LMF requests that the UE (9-01) perform aggregated UL-SRS transmission when transmitting UL-SRS for position estimation, a combination of at least one of the following information may be included in the message.

[0170] -1 bit indicator to request UL-SRS BW aggregation: A 1-bit indicator can be defined and set to request UL-SRS BW aggregation.

[0171] -Aggregated UL-SRS BW: An indicator for indicating the bandwidth of the requested Aggregated UL-SRS can be defined and set. Alternatively, the setting range of the Bandwidth field, which was previously set per FR, can be extended from the existing (FR1: 5 mHz ~ 100 mHz, FR2: 50 mHz ~ 400 MHz) to indicate a wider bandwidth exceeding 100 mHz / 400 MHz. The LMF can use the above-mentioned extended field to request a UL-SRS BW exceeding the existing 100 MHz / 400 MHz for each FR, and the serving base station (9-02) can interpret this as an implicit UL-SRS BW aggregation request.

[0172] -A number of Carriers to use for UL-SRS BW aggregation: A directive can be defined and set to request the number of Carriers to be used for UL-SRS BW aggregation. For example, the directive can indicate a value of 2 or 3.

[0173] - Set of Carriers to use for BW UL-SRS aggregation: A directive can be defined and configured to request a combination of Carriers (or serving cells) to be used for UL-SRS BW aggregation. The directive can indicate one or more Carrier combinations in the form of a list.

[0174] -Additional information for UL-SRS aggregation: When the above indicator (Set of Carriers to use for UL-SRS BW aggregation) is set, the terminal may include specific configuration information (e.g., Aggregated UL-SRS BW, CombSizeN, Periodicity, Repetition Factor, etc.) for each carrier combination.

[0175] In steps 9-20, the Serving gNB / TRP (9-02) can finally determine the SRS resources for the UE to transmit SRS. (gNB Determines UL SRS Resources)

[0176] After the Serving gNB / TRP (9-02) receives the NRPPa positioning information request message from the LMF (9-04), it can finally determine the SRS resources to be set for the UE based on the received message.

[0177] In step 9-25, the Serving gNB / TRP (9-02) can transmit the SRS resource configuration information (or SRS resource transmission configuration information, UE SRS configuration) determined in step 9-20 to the UE (9-01). (UE SRS configuration) At this time, the UE SRS configuration information can be included in the RRCReconfiguration message.

[0178] The Serving gNB / TRP (9-02) may transmit the SRS resource configuration information to the UE (9-01) via RRC signaling. At this time, the serving base station (9-02) may indicate to the UE that two or more (e.g., two or three) UL-SRS resource sets configured in different carriers (or serving cells) are aggregated (or linked). More specifically, the SRS resource configuration information may include a combination of at least one of the following contents.

[0179] - Combination of one or more aggregated UL-SRS resource sets

[0180] - ID associated with each of the above aggregated UL-SRS resource set combinations

[0181] - Two or more (e.g., 2 or 3) aggregated UL-SRS resource sets (SRS-PosResourceSet) that constitute each of the above aggregated UL-SRS resource set combinations.

[0182] - Information required to indicate the corresponding resource set for each aggregated UL-SRS resource set (serving cell ID / Index, BWP-ID, CellGroupInfo {MCG, SCG}, SRS-PosResourceSetId, etc.)

[0183] A specific method for the Serving gNB / TRP (9-02) to include the above-described information elements in the RRCReconfiguration message is described in more detail in FIG. 10.

[0184] In step 9-30, the Serving gNB / TRP (9-02) may transmit an NRPPa positioning information response message to the LMF (9-04). (NRPPa POSITIONING INFORMATION RESPONSE)

[0185] The NRPPa positioning information response message transmitted by the Serving gNB / TRP (9-02) may be used to transmit SRS resource configuration information (e.g., time / frequency axis position of SRS resources, period, spatial relation information, etc.) finally transmitted to the UE (9-01) in step 9-25 to the LMF. In addition, if the serving base station (9-02) instructs the UE (9-01) in step 9-25 that two or more (e.g., two or three) UL-SRS resource sets configured in different carriers (or serving cells) are aggregated (or linked), corresponding information may be included in the NRPPa positioning information response message.

[0186] In step 9-35, the LMF (9-04) may transmit an NRPPa POSITIONING ACTIVATION request message to the Serving gNB / TRP (9-02). (NRPPa POSITIONING ACTIVATION REQUEST)

[0187] The above NRPPa POSITIONING ACTIVATION request message can be used by the LMF (9-04) to request the Serving gNB / TRP (9-02) to activate SRS transmission of the UE (9-01) when the UE (9-02) is configured to transmit semi-persistent SRS or aperiodic SRS. Additionally, if in step 9-25 the serving base station (9-02) indicates to the terminal (9-01) that two or more (e.g., two or three) UL-SRS resource sets configured in different carriers (or serving cells) are aggregated (or linked) and corresponding information is provided to the LMF (9-04) in step 9-30, the LMF (9-04) may include information for requesting transmission activation of some (e.g., one, or two or three) of the two or more UL-SRS resource sets included in the aggregated UL-SRS resource set in the NRPPa POSITIONING ACTIVATION message.

[0188] In step 9-40, the Serving gNB / TRP (9-02) can be configured to activate SRS transmission to the UE (9-01). (Activate UE SRS transmission)

[0189] The Serving gNB / TRP (9-02) that receives the NRPPa POSITIONING ACTIVATION REQUEST message may instruct the UE (9-40) to activate SRS through MAC CE or DCI. Additionally, in step 9-25, if the serving base station (9-02) instructs the UE (9-01) that two or more (e.g., two or three) UL-SRS resource sets configured in different carriers (or serving cells) are aggregated (or linked), transmission activation of some (e.g., one, or two or three) of the two or more UL-SRS resource sets included in the aggregated UL-SRS resource set may be instructed to the UE through one MAC CE. The specific MAC CE definition and setting method for this will be described in more detail with reference to FIGS. 11 and 12a to 12c.

[0190] In step 9-45, the Serving gNB / TRP (9-02) may transmit an NRPPa POSITIONING ACTIVATION RESPONSE message to the UE (9-01). (NRPPA POSITIONING ACTIVATION RESPONSE)

[0191] The above NRPPa POSITIONING ACTIVATION RESPONSE message is a response to the NRPPa POSITIONING ACTIVATION REQUEST message, and can be used by the Serving gNB / TRP (9-02) to transmit information on whether SRS activation is complete (or whether SRS activation is complete) to the LMF (9-04).

[0192] In step 9-55, the LMF (9-04) can transmit an NRPPa MEASUREMENT REQUEST message. (NRPPa MEASUREMENT REQUEST)

[0193] The above NRPPa MEASUREMENT REQUEST message can be used by the LMF (9-04) to request the Serving gNB / TRP (9-02) and the Neighboring gNB / TRP (9-03) to measure the SRS transmitted by the UE and report the results. At this time, the NRPPa MEASUREMENT REQUEST message can also include SRS resource information set for the UE (9-01). Additionally, if in step 9-25 the serving base station (9-02) indicates to the terminal (9-01) that two or more (e.g., two or three) UL-SRS resource sets configured in different carriers (or serving cells) are aggregated (or linked) and corresponding information is provided to the LMF (9-04) in step 9-30, the LMF (9-04) may include information for requesting aggregated (or joint) measurement for the aggregated UL-SRS resource set in the NRPPa MEASUREMENT REQUEST message. The LMF may instruct the Serving gNB / TRP (9-02) and the Neighboring gNB / TRP (9-03) to perform the aggregated measurement operation through the NRPPa MEASUREMENT REQUEST message using at least one of the following methods.

[0194] ● Method 1 (1 bit indication to request the aggregated measurement): The LMF may instruct the Serving gNB / TRP (9-02) and the Neighboring gNB / TRP (9-03) to perform aggregated measurement if possible through a 1-bit indication. When the Serving gNB / TRP (9-02) and the Neighboring gNB / TRP (9-03) are instructed to perform aggregated measurement from the LMF through the 1-bit indication, they may perform aggregated measurement by utilizing some or all of the aggregated UL-PRS resource sets included in the UL-SRS configuration information included in the NRPPa MEASUREMENT REQUEST message.

[0195] ● Method 2 (Indication of AggregationID to use for the aggregated measurement): If the serving base station (9-02) provides information about the aggregated UL-SRS resource set to the terminal by allocating an Aggregation ID for each specific aggregated UL-SRS-ResourceSet in step 9-25, the LMF may instruct the Serving gNB / TRP (9-02) and the Neighboring gNB / TRP (9-03) to perform aggregated measurement by including a specific Aggregation ID in the NRPPa MEASUREMENT REQUEST message. The Serving gNB / TRP (9-02) and the Neighboring gNB / TRP (9-03) may perform aggregated measurement by using the aggregated UL-SRS Resource set combination linked to the Aggregation ID value if a specific Aggregation ID value is set in the NRPPa MEASUREMENT REQUEST message received from the LMF.

[0196] ● Method 3 (Indication of which Carriers to use for the aggregated measurement): The LMF can instruct the Serving gNB / TRP (9-02) and the Neighboring gNB / TRP (9-03) to perform aggregated measurement by setting the Carriers (or serving cells) to be used for the aggregated measurement in the NRPPa MEASUREMENT REQUEST message. When the Serving gNB / TRP (9-02) and the Neighboring gNB / TRP (9-03) indicate the Carriers to be used for the aggregated measurement in the NRPPa MEASUREMENT REQUEST message received from the LMF, the Serving gNB / TRP (9-02) and the Neighboring gNB / TRP (9-03) can perform the aggregated measurement by utilizing an appropriate combination (e.g., an aggregated UL-SRS resource set combination with good signal strength) of the UL-SRS resource sets aggregated on the indicated carriers among the aggregated UL-SRS resource sets included in the UL-SRS configuration information received together with the NRPPa MEASUREMENT REQUEST message. Note that, compared to Method 2, which explicitly indicates the UL-SRS resource set combination to perform aggregated measurement, Method 3, which only indicates the Carrier, can provide greater freedom to the Serving gNB / TRP (9-02) and Neighboring gNB / TRP (9-03) in deciding which aggregated UL-SRS resource set combination to utilize for aggregated measurement.

[0197] In steps 9-60, the Serving gNB / TRP (9-02) and the Neighboring gNB / TRP (9-03) can measure the SRS transmitted by the UE (9-01). (UL SRS Measurements)

[0198] The Serving gNB / TRP (9-02) and Neighboring gNB / TRP (9-03) that have received a request for SRS measurement from the LMF (9-04) through the NRPPa MEASUREMENT REQUEST message can measure the SRS transmitted by the UE (9-01) based on the SRS configuration information included in the NRPPa MEASUREMENT REQUEST message. Additionally, if aggregated or joint measurement is indicated in step 9-55, the Serving gNB / TRP (9-02) and Neighboring gNB / TRP (9-03) can perform aggregated or joint measurement according to the LMF (9-04) indication.

[0199] In step 9-65, the Serving gNB / TRP (9-02) and the Neighboring gNB / TRP (9-03) may transmit an NRPPa MEASUREMENT RESPONSE message to the LMF (9-04). (NRPPa MEASUREMENT RESPONSE)

[0200] The NRPPa MEASUREMENT RESPONSE message may be used by the Serving gNB / TRP (9-02) and the Neighboring gNB / TRP (9-03), which were requested to perform SRS measurement by the LMF (9-04) in step 9-55, to transmit the SRS measurement results to the LMF (9-04). Additionally, if the Serving gNB / TRP (9-02) and the Neighboring gNB / TRP (9-03) perform aggregated measurement according to the instruction of the LMF (9-04) in step 9-55 in step 9-60, the aggregated measurement results may be reported through the NRPPa MEASUREMENT RESPONSE message in step 9-65. At this time, at least one of the following two methods may be used to inform the LMF that the measurement result included in the NRPPa MEASUREMENT RESPONSE message is a result obtained by performing aggregated measurement.

[0201] ● Method 1 (using 1-bit indicator): The Serving gNB / TRP (9-02) and the Neighboring gNB / TRP (9-03) can use the 1-bit indicator to inform the LMF that the measurement result value included in the NRPPa MEASUREMENT RESPONSE message is a result value obtained through performing aggregated measurement.

[0202] ● Method 2 (Extending existing fields): Serving gNB / TRP (9-02) and Neighboring gNB / TRP (9-03) can inform the LMF that the measurement result value is the result of aggregated measurement by extending the existing fields for reporting UL-SRS measurement result values ​​(e.g., UL RTOA or gNB Rx-Tx Time Difference fields in the TRP Measurement Result IE).

[0203] In step 9-70, the LMF (9-04) may transmit an NRPPa POSITIONING DEACTIVATION message to the Serving gNB / TRP (9-02). (NRPPa POSITIONING DEACTIVATION)

[0204] The above NRPPa POSITIONING DEACTIVATION message may be transmitted to the Serving gNB / TRP (9-02) to deactivate the SRS transmission requested in step 9-35 after the LMF (9-04) completes the position estimation technique operation.

[0205] At this time, the NRPPa POSITIONING DEACTIVATION message may include the ID of the UL-SRS resource set to be deactivated. Additionally, if the serving base station (9-02) instructs the terminal (9-01) in step 9-25 that two or more (e.g., two or three) UL-SRS resource sets configured in different carriers (or serving cells) are aggregated (or linked) and corresponding information is provided to the LMF (9-04) in step 9-30, the LMF (9-04) may include information for requesting transmission deactivation of some (e.g., one, or two or three) of the two or more UL-SRS resource sets included in the aggregated UL-SRS resource set in the NRPPa POSITIONING DEACTIVATION message.

[0206] In step 9-75, the Serving gNB / TRP (9-02) can be configured to deactivate SRS transmission to the UE (9-01). (Deactivate UE SRS transmission)

[0207] In step 9-75, the Serving gNB / TRP (9-02) that receives the NRPPa POSITIONING DEACTIVATION REQUEST message can instruct the UE (9-40) to deactivate SRS via MAC CE. Additionally, in step 9-25, if the serving base station (9-02) instructs the UE (9-01) that two or more (e.g., two or three) UL-SRS resource sets configured in different carriers (or serving cells) are aggregated (or linked), transmission deactivation of some (e.g., one, or two or three) of the two or more UL-SRS resource sets included in the aggregated UL-SRS resource set can be instructed to the UE via one MAC CE. The specific MAC CE definition and setting method for this will be described in detail with reference to FIGS. 11 and 12a to 12c.

[0208] FIG. 10 is a diagram illustrating UL-SRS (Positioning SRS) configuration information elements included in an RRCReconfiguration message (9-25) according to one embodiment of the present disclosure.

[0209] The RRCReconfiguration message (10-01) may include cell group configuration information (10-10) for a master cell group (MCG) and cell group configuration information (10-20) for a secondary cell group (SCG). The configuration information (CellGroupConfig IE, 10-10, 10-20) for each cell group may include configuration information (10-12) for one or more carriers (or cells), and each cell may be associated with a specific ID (e.g., ServCellIndex). The configuration information for each cell may further include configuration information (10-13) for one or more BWPs (BandWidth Parts). Additionally, the configuration information for each BWP may include an ID (BWP-Id) of each BWP and configuration information of one or more UL-SRS resource sets (10-14, 10-17, SRS-PosResourceSet) and configuration information of one or more UL-SRS resource sets (SRS-PosResource). Within the SRS-PosResourceSet, the ID (srs-PosResourceSetId) of each SRS-PosResourceSet and information elements configured per Resource set (e.g., resource Type, periodicity, alpha, P0, pathlossReferenceRS-Pos…) and IDs (10-15, SRS-PosResourceId) for one or more UL-SRS Resources belonging to the corresponding UL-SRS Resource set may be included in a list format.

[0210] For UL-SRS (Positioning SRS) BW aggregation operation, the serving base station (9-02) can indicate to the terminal (9-01) that specific UL-SRS resources (10-17, 10-18) configured in different carriers (cells) among multiple UL-SRS resource sets (SRS-PosResourceSets) included in the RRCReconfiguration message have been aggregated. To this end, the serving base station (9-02) can indicate whether or not to perform aggregation on a per UL-SRS Resource Set (SRS-PosResourceSet) basis. For example, an aggregated UL-SRS Resource Set combination may be composed of two or three UL-SRS Resource sets transmitted from different Carriers (or cells) (e.g., a UL-SRS resource set (10-17, Set-M) transmitted from an SpCell and a UL-SRS resource set (10-18, Set-1) transmitted from one of the other Scells). In this way, as a method for the serving base station (9-02) to indicate the aggregated UL-SRS resource sets among the UL-SRS resource sets (SRS-PosResourceSet) included in the RRCReconfiguration message, at least one of the methods described below or a combination thereof may be used.

[0211] > Method 1-1 (Including UL-SRS aggregation information at the RRCReconfiguration message level, not using Aggregation ID): A new field (e.g., SRS-PosResourceSetLinkedForAggBWInfo) is defined at the RRCReconfiguration message level to indicate an aggregated UL-SRS resource set, and the field can indicate one or more combinations of aggregated UL-SRS resource sets as shown in Table 7.

[0212] RRCReconfiguration-IEs ::= SEQUENCE {otherConfig OtherConfig<<생략>>srs-PosResourceSetLinkedForAggBWInfo SetupRelease { SRS-PosResourceSetLinkedForAggBWInfo} OPTIONAL -- Need M}SRS-PosResourceSetLinkedForAggBWInfo ::= SEQUENCE (SIZE(1..MaxNrOfPosSRSAggregation)) OF SRS-PosResourceSetLinkedForAggBWListSRS-PosResourceSetLinkedForAggBWList ::= SEQUENCE (SIZE(2..maxNrOfLinkedSRS-PosResourceSet)) OF SRS-PosResourceSetLinkedForAggBWSRS-PosResourceSetLinkedForAggBW ::= SEQUENCE {srs-PosResourceSetLinked SRS-PosResourceSetId,servingCellAndBWP ServingCellAndBWP-ID,(옵션 1) cellGroupInfo ENUMERATED{MCG, SCG}(옵션 2) cellGroupInfo ENUMERATED{SCG} OPTIONAL, --Need Rcarrier ARFCN-ValueNR, OPTIONAL, --Need M}

[0213] 표 7을 참조하면, SRS-PosResourceSetLinkedForAggBWInfo는 하나 또는 복수개의 aggregation 된 UL-SRS resource set 조합(SRS-PosResourceSetLinkedForAggBWList)을 최대 MaxNrOfPosSRSAggregation개까지 포함하는 리스트일 수 있다.

[0214] Additionally, each SRS-PosResourceSetLinkedForAggBWList may be a list containing two or more (e.g., a minimum of two and a maximum of three) SRS-PosResourceSetLinkedForAggBW IEs that point to aggregated UL-SRS Resource sets.

[0215] At this time, the SRS-PosResourceSetLinkedForAggBW IE may include at least one or a combination of the following fields to indicate each aggregated UL-SRS resource set.

[0216] - srs-PosResourceSetLinked: A field indicating the ID value (SRS-PosResourceSetId) of each aggregated UL-SRS resource set.

[0217] - servingCellAndBWP: The ID of the UL-SRS resource set indicated by the above srs-PosResourceSetLinked can be assigned a unique value for each BWP. Therefore, servingCellAndBWP can indicate the ServingCellAndBWP-ID IE that includes the ID of the serving cell in which the UL-SRS resource set is set and the ID value of the BWP among the UL-SRS resource sets set in RRCReconfiguration. Alternatively, the ID of the serving cell and the ID of the BWP may each be included as separate IEs.

[0218] - cellGroupInfo: The serving cell ID indicated through the servingCellAndBWP can be assigned a unique value within each cell group (MCG or SCG). Therefore, among the UL-SRS resource sets set within RRCReconfiguration, the cell group in which the corresponding UL-SRS resource set is set can be indicated. For this purpose, the cellGroupInfo field can be defined as ENUMERATED {MCG, SCG} to indicate MCG or SCG (option 1), or can be defined as ENUMERATED {SCG} to be optionally included only when indicating SCG (option 2).

[0219] - carrier: The frequency at which the corresponding UL-SRS resource set is set can be indicated by the AFRCN (Absolute Radio Frequency Channel Number).

[0220] > Method 1-2 (Including UL-SRS aggregation information at the RRCReconfiguration message level, using Aggregation ID): A new field (e.g., SRS-PosResourceSetLinkedForAggBWInfo) is defined at the RRCReconfiguration message level to indicate an aggregated UL-SRS resource set, and the field can indicate one or more aggregated UL-SRS resource set combinations (SRS-PosResourceSetAggregation) as shown in Table 8.

[0221] RRCReconfiguration-IEs ::= SEQUENCE {otherConfig OtherConfig<<...>>srs-PosResourceSetLinkedForAggBWInfo SetupRelease { SRS-PosResourceSetLinkedForAggBWInfo} OPTIONAL -- Need M}SRS-PosResourceSetLinkedForAggBWInfo ::= SEQUENCE (SIZE(1.. MaxNrOfPosSRSAggregation)) OF SRS-PosResourceSetAggregationSRS-PosResourceSetAggregation ::= SEQUENCE {srs-PosResourceSetAggID ::= INTEGER (0..MaxNrOfAggregation-1),SRS-PosResourceSetLinkedForAggBWList ::= SEQUENCE (SIZE(2..maxNrOfLinkedSRS-PosResourceSet)) OF SRS-PosResourceSetLinkedForAggBW}SRS-PosResourceSetLinkedForAggBW ::= SEQUENCE {srs-PosResourceSetLinked SRS-PosResourceSetId,servingCellAndBWP ServingCellAndBWP-ID,(Option 1) cellGroupInfo ENUMERATED{MCG, SCG}(Option 2) cellGroupInfo ENUMERATED{SCG} OPTIONAL, --Need Rcarrier ARFCN-ValueNR, OPTIONAL, --Need M}

[0222] Referring to Table 8, SRS-PosResourceSetLinkedForAggBWInfo may be a list containing one or more aggregated UL-SRS resource set combinations (SRS-PosResourceSetAggregation) up to MaxNrOfPosSRSAggregation.

[0223] Additionally, each SRS-PosResourceSetAggregation IE may contain a field (srs-PosResourceSetAggID) indicating the ID value linked to the corresponding aggregated UL-SRS resource set combination; and a list (SRS-PosResourceSetLinkedForAggBWList) containing two or more (e.g., a minimum of two and a maximum of three) aggregated UL-SRS Resource Sets.

[0224] Unlike the above method 1-1, when an Aggregation ID (srs-PosResourceSetAggID) is allocated or connected for a specific aggregated UL-SRS resource set combination as in method 1-2, when the serving base station (9-02) uses MAC CE to instruct the terminal (9-01) to activate or deactivate transmission for UL-SRS ResourceSets included in the specific aggregated UL-SRS resource set combination, the signaling load can be significantly reduced. More specifically, instead of including multiple combinations of {serving cell ID, BWP ID, resource SET ID} associated with each UL-SRS resource set to indicate one or more aggregated UL-SRS resource sets to be activated and deactivated in the MAC CE, only one Aggregation ID (srs-PosResourceSetAggID) can be included. A specific description related to this will be described later with reference to FIGS. 11 and 12a to 12c.

[0225] The SRS-PosResourceSetLinkedForAggBW IE included in the SRS-PosResourceSetLinkedForAggBWList may include at least one or a combination of the following fields to indicate each UL-SRS resource set included in the aggregated UL-SRS resource set combination.

[0226] - srs-PosResourceSetLinked: A field indicating the ID value (SRS-PosResourceSetId) of each aggregated UL-SRS resource set.

[0227] - servingCellAndBWP: The ID of the UL-SRS resource set indicated by the above srs-PosResourceSetLinked can be set to a unique value for each BWP. Therefore, servingCellAndBWP can indicate the ServingCellAndBWP-ID IE that includes the serving cell ID and BWP ID value for which the UL-SRS resource set is set among the UL-SRS resource sets set in RRCReconfiguration. Alternatively, the ID of the serving cell and the ID of the BWP may each be included as separate IEs.

[0228] - cellGroupInfo: The serving cell ID indicated through the servingCellAndBWP can be assigned a unique value within each cell group (MCG or SCG). Therefore, among the UL-SRS resource sets set in RRCReconfiguration, the cell group in which the corresponding UL-SRS resource set is set can be indicated. For this purpose, the cellGroupInfo field can be defined as ENUMERATED {MCG, SCG} to indicate MCG or SCG (option 1), or can be defined as ENUMERATED {SCG} to be selectively included only when indicating SCG (option 2). - carrier: The frequency in which the corresponding UL-SRS resource set is set can be indicated as AFRCN (Absolute Radio Frequency Channel Number).

[0229] > Method 2-1 (including UL-SRS aggregation information at the CellgroupConfiguration level, not using Aggregation ID): A new field (e.g., SRS-PosResourceSetLinkedForAggBWInfo) is defined at the CellgroupConfiguration IE level to indicate an aggregated UL-SRS resource set, and the field can indicate one or more combinations of aggregated UL-SRS resource sets as shown in Table 9.

[0230] CellGroupConfig ::= SEQUENCE {cellGroupId CellGroupId,<<...>>[[srs-PosResourceSetLinkedForAggBWInfo SetupRelease { SRS-PosResourceSetAggregationInfo} OPTIONAL -- Need M]]}SRS-PosResourceSetLinkedForAggBWInfo ::= SEQUENCE (SIZE(1.. MaxNrOfPosSRSAggregation)) OF SRS-PosResourceSetLinkedForAggBWListSRS-PosResourceSetLinkedForAggBWList ::= SEQUENCE (SIZE(2..maxNrOfLinkedSRS-PosResourceSet)) OF SRS-PosResourceSetLinkedForAggBWSRS-PosResourceSetLinkedForAggBW ::= SEQUENCE {srs-PosResourceSetLinked SRS-PosResourceSetId,servingCellAndBWP ServingCellAndBWP-ID,carrierARFCN-ValueNR, OPTIONAL, --Need M}

[0231] Referring to Table 9, SRS-PosResourceSetLinkedForAggBWInfo may be a list containing one or more aggregated UL-SRS resource set combinations (SRS-PosResourceSetLinkedForAggBWList) up to MaxNrOfPosSRSAggregation.

[0232] Additionally, each SRS-PosResourceSetLinkedForAggBWList- may be a list containing two or more (e.g., a minimum of two and a maximum of three) SRS-PosResourceSetLinkedForAggBW IEs pointing to aggregated UL-SRS ResourceSets.

[0233] At this time, the SRS-PosResourceSetLinkedForAggBW IE may include at least one or a combination of the following fields to indicate each aggregated UL-SRS resource set.

[0234] - srs-PosResourceSetLinked: A field indicating the ID value (SRS-PosResourceSetId) of each aggregated UL-SRS resource set.

[0235] - servingCellAndBWP: The ID of the UL-SRS resource set indicated by the srs-PosResourceSetLinked may be assigned a unique value for each BWP. Therefore, servingCellAndBWP may indicate a ServingCellAndBWP-ID IE that includes the serving cell ID and BWP ID value for which the UL-SRS resource set is set among the UL-SRS resource sets set in RRCReconfiguration. Alternatively, the ID of the serving cell and the ID of the BWP may each be included as separate IEs. - carrier: The frequency for which the UL-SRS resource set is set may be indicated as an AFRCN (Absolute Radio Frequency Channel Number).

[0236] > Method 2-2 (Including UL-SRS aggregation information at the CellgroupConfiguration level, using Aggregation ID): A new field (e.g., SRS-PosResourceSetLinkedForAggBWInfo) is defined at the CellgroupConfiguration IE level to indicate an aggregated UL-SRS resource set, and the field can indicate one or more aggregated UL-SRS resource set combinations (SRS-PosResourceSetAggregation) as shown in Table 10.

[0237] CellGroupConfig ::= SEQUENCE {cellGroupId CellGroupId,<<...>>[[srs-PosResourceSetLinkedForAggBWInfo SetupRelease { SRS-PosResourceSetAggregationInfo} OPTIONAL -- Need M]]}SRS-PosResourceSetLinkedForAggBWInfo ::= SEQUENCE (SIZE(1.. MaxNrOfPosSRSAggregation)) OF SRS-PosResourceSetAggregationSRS-PosResourceSetAggregation ::= SEQUENCE {srs-PosResourceSetAggID ::= INTEGER (0..MaxNrOfAggregation-1),SRS-PosResourceSetLinkedForAggBWList ::= SEQUENCE (SIZE(2..maxNrOfLinkedSRS-PosResourceSet)) OF SRS-PosResourceSetLinkedForAggBW}SRS-PosResourceSetLinkedForAggBW ::= SEQUENCE {srs-PosResourceSetLinked SRS-PosResourceSetId,servingCellAndBWP ServingCellAndBWP-ID,carrier ARFCN-ValueNR, OPTIONAL, --Need M}

[0238] 표 10을 참조하면, SRS-PosResourceSetLinkedForAggBWInfo는 하나 또는 복수개의 aggregation 된 UL-SRS resource set 조합(SRS-PosResourceSetAggregation)을 최대 MaxNrOfPosSRSAggregation개까지 포함하는 리스트일 수 있다.

[0239] Additionally, each SRS-PosResourceSetAggregation IE may contain a field (srs-PosResourceSetAggID) indicating the ID value linked to the corresponding aggregated UL-SRS resource set combination; and a list (SRS-PosResourceSetLinkedForAggBWList) containing two or more (e.g., a minimum of two and a maximum of three) aggregated UL-SRS ResourceSets.

[0240] Unlike the above method 2-1, when an Aggregation ID (srs-PosResourceSetAggID) is allocated or connected for a characteristic aggregated UL-SRS resource set combination in method 2-2, when a serving base station (9-02) uses MAC CE to instruct a terminal (9-01) to activate or deactivate transmission for UL-SRS ResourceSets included in a specific aggregated UL-SRS resource set combination, the signaling load can be significantly reduced. More specifically, instead of including multiple combinations of {serving cell ID, BWP ID, resource SET ID} associated with each UL-SRS resource set to indicate one or more aggregated UL-SRS resource sets to be activated and deactivated in the MAC CE, only one Aggregation ID (srs-PosResourceSetAggID) can be included. A specific description related to this will be described later with reference to FIGS. 11 and 12a to 12c.

[0241] The SRS-PosResourceSetLinkedForAggBW IE included in the SRS-PosResourceSetLinkedForAggBWList may include at least one or a combination of the following fields to indicate each UL-SRS resource set included in the aggregated UL-SRS resource set combination.

[0242] - srs-PosResourceSetLinked: A field indicating the ID value (SRS-PosResourceSetId) of each aggregated UL-SRS resource set.

[0243] - servingCellAndBWP: The ID of the UL-SRS resource set indicated by the above srs-PosResourceSetLinked can be set to a unique value for each BWP. Therefore, servingCellAndBWP can indicate the ServingCellAndBWP-ID IE that includes the serving cell ID and BWP ID value for which the UL-SRS resource set is set among the UL-SRS resource sets set in RRCReconfiguration. Alternatively, the ID of the serving cell and the ID of the BWP may each be included as separate IEs.

[0244] - carrier: The frequency at which the corresponding UL-SRS resource set is set can be indicated by the AFRCN (Absolute Radio Frequency Channel Number).

[0245] When UL-SRS aggregation information is included at the RRCReconfiguration message level as in Method 1-1 and Method 1-2, aggregation between SRS-PosResourceSets configured in different cell groups (MCG or SCG) can be supported. On the other hand, when UL-SRS aggregation information is included at the CellgroupConfiguration level as in Method 2-1 and Method 2-2, signaling load can be reduced by not including a field (cellGroupInfo) for indicating a cell group in which a specific SRS-PosResourceSet is configured.

[0246] > Method 3 (Including UL-SRS aggregation information at the SRS-PosResourceSet level, using Aggregation ID):

[0247] At the SRS-PosResourceSet IE level, a new field (e.g., srs-PosResourceSetAggID) may be defined as shown in Table 11 below to indicate the ID value of the aggregated UL-SRS resource set combination that includes the corresponding UL-SRS resource set.

[0248] SRS-PosResourceSet ::= SEQUENCE {srs-PosResourceSetId SRS-PosResourceSetId,srs-PosResourceIdList SEQUENCE (SIZE(1..maxNrofSRS-ResourcesPerSet)) OF SRS-PosResourceIdOPTIONAL, -- Cond Setup<<...>>[[srs-PosResourceSetAggID ::= INTEGER (0..MaxNrOfAggregation-1) OPTIONAL -- Need R]]}}

[0249] Referring to Table 11, the aggregated UL-SRS resource set combination that includes a specific UL-SRS resource set (SRS-PosResourceSet) can be indicated through the srs-PosResourceSetAggID field. For example, the two sets (10-17 and 10-18) can be indicated to be aggregated by setting the same ID value in the srs-PosResourceSetAggID field in the SRS-PosResourceSet IE corresponding to SRS-PosResourceSet M (10-17) and SRS-PosResourceSet 1 (10-18).

[0250] In the embodiment of Table 11 above, it is assumed that one UL-SRS resource set (SRS-PosResourceSet) is included in only one aggregation combination, and thus the srs-PosResourceSetAggID field indicates one ID value. If one UL-SRS resource set (SRS-PosResourceSet) is included in multiple aggregation combinations, the srs-PosResourceSetAggID field can indicate a list of multiple ID values.

[0251] FIG. 11 is a diagram illustrating a configuration of aggregated UL-SRS Resource Sets according to one embodiment of the present disclosure.

[0252] Referring to FIG. 11, multiple UL-SRS resource sets (11-10, 11-20, 11-30) transmitted from different serving cells can be aggregated, and this can be explicitly set through an RRCReconfiguration message (9-25) transmitted by a serving base station (9-02) to a terminal (9-01) as described in FIG. 9 and FIG. 10. At this time, the aggregated UL-SRS resource set combination (11-10, 11-20, 11-30) can be linked to a separate ID value through an RRCReconfiguration message as described in FIG. 10.

[0253] The UL-SRS resource sets (11-10, 11-20, 11-30) that constitute the above-mentioned aggregated UL-SRS resource set combination may each include multiple UL-SRS resources. At this time, the terminal may implicitly determine that the UL-SRS resources included in the aggregated UL-SRS resource sets (11-10, 11-20, 11-30) explicitly configured through the RRCReconfiguration message have been aggregated if at least one of the following conditions is satisfied.

[0254] - Same periodicityAndOffset and slotOffset settings.

[0255] - Pathloss RS, Po, and alpha settings that ensure the same Tx PSD (power per subcarrier). (Same Po and alpha settings)

[0256] According to the above conditions, one or more aggregated UL-SRS resource combinations among the UL-SRS resources included in the aggregated UL-SRS resource sets (11-10, 11-20, 11-30) can be implicitly set. In this drawing example, a case where two aggregated UL-SRS resource combinations (11-01, 11-02) exist is illustrated as an example.

[0257] The serving base station explicitly sets the aggregated UL-SRS resource set combination (11-10, 11-20, 11-30) through the RRCReconfiguration message as described above, and the terminal can implicitly check one or more aggregated UL-SRS resource combinations (11-01, 11-02) among the UL-SRS resources included in the aggregated UL-SRS resource set combination.

[0258] When the types of UL-SRS resource sets constituting the aggregated UL-SRS resource set combination are semi-persistent, as in steps 9-40 and 9-75 of FIG. 9, the serving base station (9-02) can instruct the terminal (9-01) to activate or deactivate transmission of some (e.g., one, two, or three) of the UL-SRS resource sets constituting the aggregated UL-SRS resource set combination by transmitting a MAC CE.

[0259] In addition, when the above MAC CE is used to activate aggregated UL-SRS resource sets (11-10, 11-20, 11-30), spatial information (information indicating beam direction during UL-SRS transmission) may be linked one by one (11-05, 11-07) for each aggregated UL-SRS resource combination (11-01, 11-02) included in the aggregated SRS resource sets. The structure of the MAC CE for this purpose is described below in FIGS. 12a to 12c.

[0260] FIGS. 12A to 12C are diagrams illustrating various structures of a MAC CE used to activate or deactivate aggregated UL-SRS Resource Sets according to one embodiment of the present disclosure.

[0261] > Option 1 (12-40, when using the aggregation ID to indicate which aggregated UL-SRS resource set combination to enable / disable)

[0262] When each aggregated UL-SRS resource set combination is associated with a specific aggregation ID through an RRCReconfiguration message, as in Method 1-2, Method 2-2, and Method 3 described in FIG. 10, a Positioning SRS aggregation ID (12-41) may be included in the MAC CE to indicate which of the aggregated UL-SRS resource set combinations explicitly set through the RRCReconfiguration message is to be activated or deactivated. A MAC CE having a structure of Option 1 (12-40) may include at least one of the following fields.

[0263] * Positioning SRS aggregation ID (12-41): The aggregated UL-SRS resource set combination to be activated or deactivated among the aggregated UL-SRS resource set combinations explicitly configured through the RRCReconfiguration message can be indicated. At this time, the Positioning SRS aggregation ID may be an ID value linked to each aggregated UL-SRS resource set combination, as in Method 1-2, Method 2-2, and Method 3 of FIG. 10. Meanwhile, if only one aggregated UL-SRS resource set combination has been configured through the RRCReconfiguration message, there is no need to separately indicate the combination to be activated or deactivated, and thus the Positioning SRS aggregation ID may not be included.

[0264] * SET_i: The MAC CE may include 1-bit indicators (e.g., SET_0, SET_1, SET_2) corresponding to each UL-SRS resource set to indicate activation or deactivation of each of the UL-SRS resource sets constituting the aggregated UL-SRS resource set combination indicated through the Positioning SRS aggregation ID. When the value of SET_i is set to 1 upon receiving the MAC CE, the terminal may activate transmission of the corresponding UL-SRS resource set. When the value of SET_i is set to 0 upon receiving the MAC CE, the terminal may deactivate transmission of the corresponding UL-SRS resource set. At this time, one of the following two methods may be used to determine the UL-SRS resource set corresponding to SET_i among the UL-SRS resource sets constituting the aggregated UL-SRS resource set combination.

[0265] - Method A (see Method 1-2 and Method 2-2 of the above-described FIG. 10): SET i may indicate the SRS-PosResourceSet set in the i-th entry in the SRS-PosResourceSetLinkedForAggBWList corresponding to the indicated aggregated UL-SRS resource set combination.

[0266] - Method B (refer to Method 1-2, Method 2-2, and Method 3 of the above-described Figure 10): SET i can indicate the PosResourceSet corresponding to the i-th when the SRS-PosResourceSets included in the aggregated UL-SRS resource set combination are sorted in ascending order of the ServCellIndex (index value of the serving cell where each Set is set) corresponding to each Set.

[0267] *S: A 1-bit indicator indicating whether beam information is additionally included in the MAC CE. When the MAC CE is used to activate some of the UL-SRS resource sets included in the aggregated UL-SRS resource set combination, beam information (spatial relation) used for transmission of the aggregated UL-SRS resources may be optionally included. For example, when S is set to 1, it may mean that spatial relation information is included in the corresponding MAC CE, and when it is set to 0, it may mean that spatial relation information is not included in the corresponding MAC CE. When the MAC CE is used to deactivate UL-SRS resource sets included in the aggregated UL-SRS resource set combination, beam information (spatial relation) used for transmission of the aggregated UL-SRS resources may not be included and S may be set to 0.

[0268] *Spatial Relation for (aggregated) Resource_k: Beam information (Spatial relation) used for transmission of aggregated UL-SRS resources. When the MAC CE is used to activate some of the UL-SRS resource sets included in the aggregated UL-SRS resource set combination and the S field is set to 1, beam information (Spatial relation) used for transmission of the aggregated UL-SRS resources can be indicated through the field. When the aggregated UL-SRS resource sets to be activated are indicated through the Positioning SRS aggregation ID and SET_i, the Spatial Relation field can indicate spatial relation information for each of the aggregated UL-SRS resource combinations that are implicitly identified by satisfying the conditions described in FIG. 11 among the UL-SRS resources included in the sets. At this time, one of the following two methods can be used to indicate spatial relation information for each aggregated UL-SRS resource combination.

[0269] - Method A: A method of indicating spatial relation information for Aggregated SRS-PosResource k. Aggregated SRS-PosResource k can indicate the kth SRS-PosResource when the aggregated SRS-PosResources included in the SRS-PosResourceSet corresponding to SET_0 (or the SET with the smallest index among SET_i set to 1) are sorted in ascending order of srs-PosResourceId. The spatial relation information indicated for the Aggregated SRS-PosResource k can be spatial relation information of an aggregated resource combination including the SRS-PosResource k.

[0270] - Method B: A method of indicating spatial relation information for SRS-PosResource k. SRS-PosResource k can indicate the kth SRS-PosResource when SRS-PosResources included in the SRS-PosResourceSet corresponding to SET_0 (or the SET with the smallest index among SET_i set to 1) are sorted in ascending order of srs-PosResourceId. The spatial relation information indicated for the SRS-PosResource k can be spatial relation information of an aggregated resource combination including the SRS-PosResource k.

[0271] > Option 2 (12-50, if no aggregation ID is used to indicate which aggregated UL-SRS resource set combination to enable / disable)

[0272] In order to indicate which combination of aggregated UL-SRS resource sets to activate or deactivate among the combinations explicitly configured through the RRCReconfiguration message, the MAC CE may indicate one of the UL-SRS resource sets belonging to the combination. A MAC CE having the structure of Option 2 (12-50) may include at least one of the following fields.

[0273] * Positioning SRS Resource Set's Cell ID, Positioning SRS Resource Set's BWP ID, Positioning SRS Resource Set ID: The MAC CE may indicate one of the UL-SRS resource sets belonging to the aggregated UL-SRS resource set combinations explicitly set through the RRCReconfiguration message in order to indicate a combination to be activated or deactivated. At this time, in order to indicate the UL-SRS resource set, the ID / index of the serving cell where the corresponding SRS-PosResourceSet is set, the ID of the BWP where the corresponding SRS-PosResourceSet is set, and the ID (SRS-PosResourceSetId) of the corresponding SRS-PosResourceSet may be included in the MAC CE.

[0274] * SET_i: The MAC CE may include 1-bit indicators (e.g., SET_0, SET_1, SET_2) corresponding to each UL-SRS resource set to indicate activation or deactivation of each of the UL-SRS resource sets constituting the indicated aggregated UL-SRS resource set combination. When the value of SET_i is set to 1 upon receiving the MAC CE, the terminal may activate transmission of the corresponding UL-SRS resource set. When the value of SET_i is set to 0 upon receiving the MAC CE, the terminal may deactivate transmission of the corresponding UL-SRS resource set. At this time, one of the following two methods may be used to determine the UL-SRS resource set corresponding to SET_i among the UL-SRS resource sets constituting the aggregated UL-SRS resource set combination.

[0275] - Method A (see Method 1-1 and Method 2-1 of the above-described FIG. 10): SET i may indicate the SRS-PosResourceSet set in the i-th entry in the SRS-PosResourceSetLinkedForAggBWList corresponding to the indicated aggregated UL-SRS resource set combination.

[0276] - Method B (refer to Method 1-1 and Method 2-1 of the above-described Figure 10): SET i can indicate the PosResourceSet corresponding to the i-th when SRS-PosResourceSets included in the indicated aggregated UL-SRS resource set combination are sorted in ascending order of ServCellIndex (index value of the serving cell where each Set is set) corresponding to each Set.

[0277] *S: A 1-bit indicator indicating whether beam information is included in the MAC CE. When the MAC CE is used to activate some of the UL-SRS resource sets included in the aggregated UL-SRS resource set combination, beam information (spatial relation) used for transmission of the aggregated UL-SRS resources may be optionally included. For example, when S is set to 1, it may mean that spatial relation information is included in the corresponding MAC CE, and when it is set to 0, it may mean that spatial relation information is not included in the corresponding MAC CE. When the MAC CE is used to deactivate UL-SRS resource sets included in the aggregated UL-SRS resource set combination, beam information (spatial relation) used for transmission of the aggregated UL-SRS resources may not be included and S may be set to 0.

[0278] *C: This field indicates whether octets including a serving cell ID and a BWP ID are included in the Spatial Relation for Resource_k. If the MAC CE is used to activate some of the UL-SRS resource sets included in the aggregated UL-SRS resource set combination, the field may be set to a value of 0 or 1. For example, if the field value is 1, octets including a serving cell ID and a BWP ID may be included in the Spatial Relation for Resource_k. If the field value is 0, octets including a serving cell ID and a BWP ID may not be included in the Spatial Relation for Resource_k. In this case, the serving cell ID and BWP ID corresponding to the DL Reference signal included in the Spatial Relation for Resource_k may be the same as the Cell ID of the Positioning SRS Resource Set and the BWP ID of the Positioning SRS Resource Set, respectively. If the above MAC CE is used to deactivate UL-SRS resource sets included in the aggregated UL-SRS resource set combination, the field value may be set to 0.

[0279] *Spatial Relation for (aggregated) Resource_k: Beam information (Spatial relation) used for transmission of aggregated UL-SRS resources. When the MAC CE is used to activate some of the UL-SRS resource sets included in the aggregated UL-SRS resource set combination and the S field is set to 1, beam information (Spatial relation) used for transmission of the aggregated UL-SRS resources can be indicated through the field. When the aggregated UL-SRS resource sets activated through the Positioning SRS aggregation ID and SET_i are indicated, the Spatial Relation field can indicate spatial relation information for each of the aggregated UL-SRS resource combinations that are implicitly identified by satisfying the conditions described in FIG. 11 among the UL-SRS resources included in the sets. At this time, one of the following two methods can be used to indicate spatial relation information for each aggregated UL-SRS resource combination.

[0280] - Method A: A method of indicating spatial relation information for Aggregated SRS-PosResource k. Aggregated SRS-PosResource k may indicate the kth SRS-PosResource when the aggregated SRS-PosResources included in the SRS-PosResourceSet corresponding to SET_0 (or the SET with the smallest index among SET_i set to 1; or the SET indicated through the Positioning SRS Resource Set's Cell ID, the Positioning SRS Resource Set's BWP ID, and the Positioning SRS Resource Set ID) are sorted in ascending order of srs-PosResourceId. The spatial relation information indicated for the Aggregated SRS-PosResource k may be spatial relation information of an aggregated resource combination including the corresponding SRS-PosResource k.

[0281] - Method B: A method of indicating spatial relation information for SRS-PosResource k. SRS-PosResource k may indicate the kth SRS-PosResource when SRS-PosResources included in an SRS-PosResourceSet corresponding to SET_0 (or a SET having a smallest index among SET_i set to 1; or a SET indicated through the Positioning SRS Resource Set's Cell ID, the Positioning SRS Resource Set's BWP ID, and the Positioning SRS Resource Set ID) are sorted in ascending order of srs-PosResourceId. The spatial relation information indicated for the SRS-PosResource k may be spatial relation information of an aggregated resource combination including the corresponding SRS-PosResource k.

[0282] > Option 3 (12-60, if no aggregation ID is used to indicate which aggregated UL-SRS resource set combination to enable / disable)

[0283] : In order to indicate a combination to be activated or deactivated among the aggregated UL-SRS resource set combinations explicitly set through the RRCReconfiguration message, the MAC CE may indicate one or more target SRS-PosResourceSets to be activated or deactivated among the UL-SRS resource sets belonging to the combination. A MAC CE having a structure of Option 3 (12-60) may include at least one of the following fields.

[0284] *A / D: A 1-bit indicator indicating whether the above MAC CE is intended to activate or deactivate the transmission of aggregated UL-SRS resource sets. For example, if the A / D value is set to 1, it may indicate an activation indication, and if it is set to 0, it may indicate a deactivation indication.

[0285] * Positioning SRS Resource Set's Cell ID_i, Positioning SRS Resource Set's BWP ID_i, Positioning SRS Resource Set ID_i: The MAC CE may indicate one or more UL-SRS resource sets i to be activated or deactivated among the aggregated UL-SRS resource sets explicitly configured through the RRCReconfiguration message. At this time, in order to indicate each UL-SRS resource set i, the ID / index of the serving cell to which the set i is configured, the ID of the BWP to which the SRS-PosResourceSet is configured, and the ID (SRS-PosResourceSetId) of the SRS-PosResourceSet may be included in the MAC CE. The MAC CE may indicate one or more (e.g., a minimum of 1 and a maximum of 3) UL-SRS resource sets i as targets for activation or deactivation. Therefore, one or more combinations of information (e.g., at least 1 and at most 3) for indicating a specific UL-SRS resource set (ID / index of serving cell, ID of BWP, and SRS-PosResourceSetId) may be included in the MAC CE.

[0286] * S_i: When the MAC CE is used to activate some of the UL-SRS resource sets included in the aggregated UL-SRS resource set combination, beam information (Spatial relation) used for transmission of the aggregated UL-SRS resources may be optionally included. At this time, a 1-bit indicator S_i corresponding to each UL-SRS resource set i may be included in the MAC CE to indicate which UL-SRS resource set (SRS-PosResourceSet) the spatial relation for (aggregated) Resource_k is set based on. As described above, an S_i value corresponding to each UL-SRS resource set i indicated through the Positioning SRS Resource Set's Cell ID_i, the Positioning SRS Resource Set's BWP ID_i, and the Positioning SRS Resource Set ID_i may be included. If only one of multiple S_i values ​​can be set to 1, then if a specific S_i value is 1, it may mean that the spatial relation for (aggregated) Resource_k is set based on the UL-SRS resource set i corresponding to the S_i. If multiple S_i values ​​are allowed to be set to 1 and multiple S_i values ​​are set to 1, it may mean that spatial relation information is indicated for each UL-SRS resource set i corresponding to each S_i.

[0287] *Spatial Relation for (aggregated) Resource_k: When the MAC CE is used to activate some of the UL-SRS resource sets included in the aggregated UL-SRS resource set combination, beam information (spatial relation) used for transmission of the aggregated UL-SRS resources may be included. When the aggregated UL-SRS resource sets to be activated are indicated through the Positioning SRS Resource Set's Cell ID_i, the Positioning SRS Resource Set's BWP ID_i, and the Positioning SRS Resource Set ID_i, the Spatial Relation field may indicate spatial relation information for each of the aggregated UL-SRS resource combinations that are implicitly identified by satisfying the conditions described in FIG. 11 among the UL-SRS resources included in the sets. At this time, one of the following two methods may be used as a method of indicating spatial relation information for each aggregated UL-SRS resource combination.

[0288] Method A: A method of indicating spatial relation information for an Aggregated SRS-PosResource k. The aggregated SRS-PosResource k may indicate the kth SRS-PosResource when the aggregated SRS-PosResources in the SRS-PosResourceSet corresponding to the UL-SRS resource set i (or the UL-SRS resource set 0 indicated first in the MAC CE; or the UL-SRS resource set i having the lowest serving cell index) in which the S_i value is set to 1 are sorted in ascending order of srs-PosResourceId. The spatial relation information indicated for the Aggregated SRS-PosResource k may be spatial relation information of an aggregated resource combination including the corresponding SRS-PosResource k.

[0289] Method B: A method of indicating spatial relation information for SRS-PosResource k. SRS-PosResource k may indicate the kth SRS-PosResource when SRS-PosResources in an SRS-PosResourceSet corresponding to UL-SRS resource set i (or UL-SRS resource set 0 indicated first in the MAC CE; or UL-SRS resource set i having the lowest serving cell index) in which the S_i value is set to 1 are sorted in ascending order of srs-PosResourceId. The spatial relation information indicated for the SRS-PosResource k may be spatial relation information of an aggregated resource combination including the SRS-PosResource k.

[0290] The information elements included in each of the structural options (12-40, 12-50, 12-60) of the MAC CE of FIGS. 12a to 12c are not limited to the combination within the embodiment, and a combination of information elements included in different embodiments may actually be included together in the MAC CE.

[0291] Meanwhile, the expression 'UL-SRS resource set' used in describing the embodiments of FIGS. 8, 9, 10, 11, and 12a to 12c may be replaced with expressions such as 'positioning SRS resource set' and 'SRS-PosResourceSet', and the expression 'UL-SRS resource' may be replaced with expressions such as 'positioning SRS resource' and 'SRS-PosResource', respectively. The above-described replaceable expressions may have essentially the same meaning.

[0292] FIG. 13 is a diagram illustrating a terminal device according to one embodiment of the present disclosure.

[0293] Referring to FIG. 13, the terminal may include an RF (Radio Frequency) processing unit (13-10), a baseband processing unit (13-20), a storage unit (13-30), and a control unit (13-40). The configuration of the terminal is not limited to the exemplary configuration illustrated in FIG. 13, and may include fewer or more configurations than the configuration illustrated in FIG. 13.

[0294] The RF processing unit (13-10) can perform functions for transmitting and receiving signals through a wireless channel, such as signal band conversion and amplification. For example, the RF processing unit (13-10) can up-convert a baseband signal provided from the baseband processing unit (13-20) into an RF band signal and transmit it through an antenna, and can down-convert an RF band signal received through the antenna into a baseband signal. For example, the RF processing unit (13-10) can include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a digital to analog convertor (DAC), an analog to digital convertor (ADC), etc., but is not limited to these examples. In Fig. 13, only one antenna is illustrated, but the terminal can be equipped with multiple antennas. In addition, the RF processing unit (13-10) can include multiple RF chains. Furthermore, the RF processing unit (13-10) can perform beamforming. For beamforming, the RF processing unit (13-10) can adjust the phase and magnitude of each signal transmitted and received through multiple antennas or antenna elements. In addition, the RF processing unit (13-10) can perform MIMO and receive multiple layers when performing MIMO operation. The RF processing unit (13-10) can perform reception beam sweeping by appropriately setting multiple antennas or antenna elements according to the control of the control unit, or can adjust the direction and beam width of the reception beam so that the reception beam is coordinated with the transmission beam.

[0295] According to one embodiment of the present disclosure, the baseband processing unit (13-20) can perform a conversion function between a baseband signal and a bit stream according to the physical layer specification of the system. For example, when transmitting data, the baseband processing unit (13-20) can generate complex symbols by encoding and modulating a transmission bit stream. In addition, when receiving data, the baseband processing unit (13-20) can restore the reception bit stream by demodulating and decoding the baseband signal provided from the RF processing unit (13-10). For example, in the case of following the OFDM (orthogonal frequency division multiplexing) method, when transmitting data, the baseband processing unit (13-20) can generate complex symbols by encoding and modulating a transmission bit stream, map the generated complex symbols to subcarriers, and then configure OFDM symbols through an inverse fast Fourier transform (IFFT) operation and a cyclic prefix (CP) insertion. In addition, when receiving data, the baseband processing unit (13-20) divides the baseband signal provided from the RF processing unit (13-10) into OFDM symbol units, restores signals mapped to subcarriers through FFT (fast Fourier transform) operation, and then restores the received bit string through demodulation and decoding.

[0296] According to one embodiment of the present disclosure, the baseband processing unit (13-20) and the RF processing unit (13-10) can transmit and receive signals as described above. Accordingly, the baseband processing unit (13-20) and the RF processing unit (13-10) may be referred to as a transmitter, a receiver, a transceiver, or a communication unit. Furthermore, at least one of the baseband processing unit (13-20) and the RF processing unit (13-10) may include a plurality of communication modules to support a plurality of different wireless access technologies. In addition, at least one of the baseband processing unit (13-20) and the RF processing unit (13-10) may include different communication modules to process signals of different frequency bands. For example, the different wireless access technologies may include a wireless LAN (e.g., IEEE 802.11), a cellular network (e.g., LTE), etc. Additionally, different frequency bands may include super high frequency (SHF) (e.g., 2.5 GHz, 5 GHz) bands and millimeter wave (mm wave) (e.g., 60 GHz) bands. The terminal may transmit and receive signals with the gNB using the baseband processing unit (13-20) and the RF processing unit (13-10), and the signals may include control information and data.

[0297] According to one embodiment of the present disclosure, the storage unit (13-30) can store data such as basic programs, application programs, and setting information for the operation of the terminal. For example, the storage unit (13-30) can store data information such as basic programs, application programs, and setting information for the operation of the terminal. In addition, the storage unit (13-30) can provide the stored data upon request of the control unit (13-40). The storage unit (13-30) can be configured as a storage medium or a combination of storage media such as a ROM, a RAM, a hard disk, a CD-ROM, and a DVD. In addition, the storage unit (13-30) can be configured as a plurality of memories. According to one embodiment of the present disclosure, the storage unit (13-30) can also store a program for performing terminal position estimation according to the present disclosure.

[0298] The control unit (13-40) can control the overall operations of the terminal. For example, the control unit (13-40) can transmit and receive signals through the baseband processing unit (13-20) and the RF processing unit (13-10) to control the operations of the terminal described above with reference to FIGS. 1 to 12c.

[0299] In addition, the control unit (13-40) can record and read data in the storage unit (13-30). For this purpose, the control unit (13-40) may include at least one processor. For example, the control unit (13-40) may include a communication processor (CP) that performs control for communication and an application processor (AP) that controls upper layers such as application programs. In addition, according to one embodiment of the present disclosure, the control unit (13-40) may include a multi-connection processing unit (13-42) configured to process a process operating in a multi-connection mode. In addition, at least one component within the terminal may be implemented as a single chip.

[0300] FIG. 14 is a diagram illustrating a base station device according to one embodiment of the present disclosure.

[0301] The base station of FIG. 14 may be included in the aforementioned network. Furthermore, according to one embodiment of the present disclosure, a network entity (or network function) may have a configuration identical to or similar to that of the base station of FIG. 14. For example, an LMF entity may have a configuration identical to or similar to that of the base station of FIG. 14.

[0302] As illustrated in FIG. 14, the base station may include an RF processing unit (14-10), a baseband processing unit (14-20), a backhaul communication unit (14-30), a storage unit (14-40), and a control unit (14-50). The configuration of the base station is not limited to the exemplary configuration illustrated in FIG. 14, and the base station may include fewer or more configurations than the configuration illustrated in FIG. 14. The RF processing unit (14-10) may perform functions for transmitting and receiving signals through a wireless channel, such as signal band conversion and amplification. For example, the RF processing unit (14-10) may up-convert a baseband signal provided from the baseband processing unit (14-20) into an RF band signal and then transmit the same through an antenna, and may down-convert an RF band signal received through the antenna into a baseband signal. For example, the RF processing unit (14-10) may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, etc. In Fig. 14, only one antenna is illustrated, but the RF processing unit (14-10) may have multiple antennas. In addition, the RF processing unit (14-10) may include multiple RF chains. Furthermore, the RF processing unit (14-10) may perform beamforming. For beamforming, the RF processing unit (14-10) may adjust the phase and magnitude of each signal transmitted and received through the multiple antennas or antenna elements. The RF processing unit (14-10) may perform a downlink MIMO operation by transmitting one or more layers.

[0303] According to one embodiment of the present disclosure, the baseband processing unit (14-20) can perform a conversion function between a baseband signal and a bit stream according to a physical layer standard. For example, when transmitting data, the baseband processing unit (14-20) can generate complex symbols by encoding and modulating a transmission bit stream. In addition, when receiving data, the baseband processing unit (14-20) can restore a reception bit stream by demodulating and decoding a baseband signal provided from the RF processing unit (14-10). For example, in the case of following the OFDM method, when transmitting data, the baseband processing unit (14-20) can generate complex symbols by encoding and modulating a transmission bit stream, map the generated complex symbols to subcarriers, and then configure OFDM symbols through an IFFT operation and CP insertion. In addition, when receiving data, the baseband processing unit (14-20) can divide the baseband signal provided from the RF processing unit (14-10) into OFDM symbol units, restore the signals mapped to subcarriers through FFT operation, and then restore the received bit string through demodulation and decoding. The baseband processing unit (14-20) and the RF processing unit (14-10) can transmit and receive signals as described above. Accordingly, the baseband processing unit (14-20) and the RF processing unit (14-10) may be referred to as a transmitting unit, a receiving unit, a transceiver unit, a communication unit, or a wireless communication unit. The base station can transmit and receive signals with the terminal using the baseband processing unit (14-20) and the RF processing unit (14-10), and the signals may include control information and data.

[0304] According to one embodiment of the present disclosure, the backhaul communication unit (14-30) may provide an interface for communicating with other nodes within the network. For example, the backhaul communication unit (14-30) may convert a bit stream transmitted from a base station to another node, such as an auxiliary base station or a core network, into a physical signal, and may convert a physical signal received from another node into a bit stream.

[0305] According to one embodiment of the present disclosure, the storage unit (14-40) can store data such as basic programs, application programs, and setting information for the operation of the base station. For example, the storage unit (14-40) can store information on bearers assigned to connected terminals, measurement results reported from connected terminals, etc. In addition, the storage unit (14-40) can store information that serves as a basis for determining whether to provide or terminate multiple connections to the terminal. In addition, the storage unit (14-40) can provide the stored data according to a request from the control unit (14-50). The storage unit (14-40) can be configured as a storage medium such as a ROM, a RAM, a hard disk, a CD-ROM, and a DVD, or a combination of storage media. In addition, the storage unit (14-40) can be configured as a plurality of memories. According to one embodiment of the present disclosure, the storage unit (14-40) can also store a program for performing terminal position estimation according to the present disclosure.

[0306] The control unit (14-50) can control the overall operations of the base station. For example, the control unit (14-50) can transmit and receive signals through the baseband processing unit (14-20) and the RF processing unit (14-10) or through the backhaul communication unit (14-30) to control the operations of the base station described above with reference to FIGS. 1 to 12C. In addition, the control unit (14-50) can record and read data in the storage unit (14-40). For this purpose, the control unit (14-50) can include at least one processor. In addition, according to one embodiment of the present disclosure, the control unit (14-50) can include a multi-connection processing unit (14-52) configured to process a process operating in a multi-connection mode.

[0307] When implemented in software, a computer-readable storage medium storing one or more programs (software modules) may be provided. The one or more programs stored in the computer-readable storage medium are configured for execution by one or more processors within an electronic device. The one or more programs include instructions that cause the electronic device to execute methods according to the embodiments described in the claims or specification of the present disclosure.

[0308] These programs (software modules, software) may be stored in random access memory, non-volatile memory including flash memory, read only memory (ROM), electrically erasable programmable read only memory (EEPROM), magnetic disc storage device, compact disc ROM (CD-ROM), digital versatile discs (DVDs) or other forms of optical storage device, magnetic cassette. Or, they may be stored in a memory configured as a combination of some or all of these. In addition, each configuration memory may be included in multiple numbers.

[0309] Additionally, the program may be stored on an attachable storage device that is accessible via a communication network, such as the Internet, an intranet, a local area network (LAN), a wide local area network (WLAN), a storage area network (SAN), or a combination thereof. Such a storage device may be connected to a device performing an embodiment of the present disclosure via an external port. Additionally, a separate storage device on the communication network may be connected to a device performing an embodiment of the present disclosure.

[0310] In this disclosure, the term "computer program product" or "computer-readable medium" is used to collectively refer to media such as memory, a hard disk installed in a hard disk drive, and signals. These "computer program products" or "computer-readable mediums" are components provided in a method for reporting terminal capabilities in a wireless communication system according to the present disclosure.

[0311] A device-readable storage medium may be provided in the form of a non-transitory storage medium. Here, the term "non-transitory storage medium" simply means a tangible device that does not contain signals (e.g., electromagnetic waves). This term does not distinguish between cases where data is permanently stored in the storage medium and cases where data is temporarily stored. For example, a "non-transitory storage medium" may include a buffer in which data is temporarily stored.

[0312] According to one embodiment, the method according to various embodiments disclosed in the present document may be provided as included in a computer program product. The computer program product may be traded as a product between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., compact disc read only memory (CD-ROM)), or may be distributed online (e.g., downloaded or uploaded) via an application store (e.g., Play Store™) or directly between two user devices (e.g., smartphones). In the case of online distribution, at least a portion of the computer program product (e.g., a downloadable app) may be temporarily stored or temporarily generated in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

[0313] In the specific embodiments of the present disclosure described above, components included in the invention are expressed in the singular or plural form, depending on the specific embodiment presented. However, the singular or plural expressions are selected to suit the presented situation for convenience of explanation, and the present disclosure is not limited to singular or plural components. Even components expressed in the plural form may be composed of singular elements, or even components expressed in the singular form may be composed of plural elements.

[0314] Meanwhile, the embodiments of the present disclosure disclosed in this specification and drawings are merely specific examples to easily explain the technical contents of the present disclosure and to help understand the present disclosure, and are not intended to limit the scope of the present disclosure. In other words, it will be apparent to those skilled in the art that other modified examples based on the technical idea of ​​the present disclosure are possible. In addition, each embodiment can be combined and operated as needed. For example, parts of one embodiment of the present disclosure and another embodiment can be combined to operate a base station and a terminal. In addition, the embodiments of the present disclosure can be applied to other communication systems, and other modified examples based on the technical idea of ​​the embodiments can also be implemented. For example, the embodiments can be applied to LTE systems, 5G, NR systems, or 6G systems. Therefore, the scope of the present disclosure should not be limited to the described embodiments, but should be determined not only by the scope of the following claims but also by equivalents of the claims.

Claims

1. A method performed by a terminal of a wireless communication system, A step of receiving an RRC (radio resource control) message including configuration information for a combination of aggregated SRS (sounding reference signal) resource sets; A step of receiving a MAC CE (medium access control-control element) for activating or deactivating the above-mentioned integrated SRS resource sets; and A step of transmitting an SRS for positioning based on at least one aggregated SRS resource set activated by the MAC CE, A method, characterized in that the MAC CE includes first information indicating the combination of the integrated SRS resource sets and second information indicating an activation or deactivation state for each of the integrated SRS resource sets.

2. In paragraph 1, A method characterized in that the MAC CE further includes third information indicating, in ascending order, spatial relation information for aggregated SRS resources among SRS resources in the SRS resource set first activated by the second information.

3. In paragraph 2, The above MAC CE further includes fourth information indicating whether the third information exists, A method characterized in that the third information is included in the MAC CE under the condition that the MAC CE is used to activate at least one of the integrated SRS resource sets and the value of the fourth information is set to 1.

4. In paragraph 1, A method characterized in that the above configuration information includes an identifier indicating a serving cell and a bandwidth part (BWP) associated with each SRS resource set.

5. A method performed by a base station of a wireless communication system, A step of transmitting an RRC (radio resource control) message including configuration information for a combination of aggregated SRS (sounding reference signal) resource sets; A step of transmitting a MAC CE (medium access control-control element) for activating or deactivating the above-mentioned integrated SRS resource sets; and A step of receiving an SRS for positioning based on at least one aggregated SRS resource set activated by the MAC CE, A method, characterized in that the MAC CE includes first information indicating the combination of the integrated SRS resource sets and second information indicating an activation or deactivation state for each of the integrated SRS resource sets.

6. In paragraph 5, A method characterized in that the MAC CE further includes third information indicating, in ascending order, spatial relation information for aggregated SRS resources among SRS resources in the SRS resource set first activated by the second information.

7. In paragraph 6, The above MAC CE further includes fourth information indicating whether the third information exists, A method characterized in that the third information is included in the MAC CE under the condition that the MAC CE is used to activate at least one of the integrated SRS resource sets and the value of the fourth information is set to 1.

8. In paragraph 6, A method characterized in that the above configuration information includes an identifier indicating a serving cell and a bandwidth part (BWP) associated with each SRS resource set.

9. In the terminal of a wireless communication system, Transmitter and receiver; and comprising a control unit, said control unit comprising: Receives, through the transceiver, an RRC (radio resource control) message including configuration information for a combination of aggregated SRS (sounding reference signal) resource sets, Receives a MAC CE (medium access control-control element) for activating or deactivating the above-mentioned integrated SRS resource sets through the transceiver, and also Based on at least one aggregated SRS resource set activated by the MAC CE, the transmitter is configured to transmit an SRS for positioning through the transmitter / receiver. A terminal, characterized in that the MAC CE includes first information indicating the combination of the integrated SRS resource sets and second information indicating an activation or deactivation state for each of the integrated SRS resource sets.

10. In paragraph 9, A terminal characterized in that the MAC CE further includes third information indicating, in ascending order, spatial relation information for aggregated SRS resources among the SRS resources in the SRS resource set first activated by the second information.

11. In paragraph 10, The above MAC CE further includes fourth information indicating whether the third information exists, A terminal characterized in that the third information is included in the MAC CE under the condition that the MAC CE is used to activate at least one of the integrated SRS resource sets and the value of the fourth information is set to 1.

12. In paragraph 9, A terminal characterized in that the above configuration information includes an identifier indicating a serving cell and a bandwidth part (BWP) associated with each SRS resource set.

13. In a base station of a wireless communication system, Transmitter and receiver; and comprising a control unit, said control unit comprising: Transmitting an RRC (radio resource control) message containing configuration information for a combination of aggregated SRS (sounding reference signal) resource sets through the transceiver, Transmitting a MAC CE (medium access control-control element) to activate or deactivate the above-mentioned integrated SRS resource sets through the transceiver, and also Based on at least one integrated SRS resource set activated by the MAC CE, the transceiver is configured to receive an SRS for positioning, A base station, characterized in that the MAC CE includes first information indicating the combination of the integrated SRS resource sets and second information indicating an activation or deactivation state for each of the integrated SRS resource sets.

14. In paragraph 13, The above MAC CE further includes third information indicating spatial relation information for the aggregated SRS resources among the SRS resources in the SRS resource set first activated by the second information in ascending order, and fourth information indicating whether the third information exists. A base station, characterized in that the third information is included in the MAC CE under the condition that the MAC CE is used to activate at least one of the integrated SRS resource sets and the value of the fourth information is set to 1.

15. In paragraph 13, A base station, characterized in that the above configuration information includes an identifier indicating a serving cell and a bandwidth part (BWP) associated with each SRS resource set.

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