Method and apparatus for estimating ue position in a wireless communication system

Abstract

This disclosure relates to 5G or 6G communication systems for supporting higher data transmission rates. According to embodiments of this disclosure, a method performed by a UE in a wireless communication system includes: receiving a radio resource control (RRC) message including configuration information about a combination of aggregated probe reference signal (SRS) resource sets; receiving a media access control-control element (MAC CE) for activating or deactivating the aggregated SRS resource sets; and transmitting SRS for positioning based on at least one aggregated SRS resource set activated by the MAC CE. The MAC CE includes first information indicating a combination of aggregated SRS resource sets and second information indicating the activation or deactivation state of each aggregated SRS resource set.

Description

Technical Field

[0001] This disclosure relates to a wireless communication system. More specifically, this disclosure relates to a method and apparatus for estimating the location of a user equipment (UE) by using aggregated UL-SRS. Background Technology

[0002] 5G mobile communication technology defines a wide frequency band to enable high transmission rates and new services, and it can be implemented not only in the "sub-6GHz" band, such as 3.5GHz, but also in the "above 6GHz" band, including 28GHz and 39GHz, known as mmWave. Furthermore, 6G mobile communication technology (called Super 5G systems) has been considered for implementation in terahertz bands (e.g., the 95GHz to 3THz band) to achieve transmission rates fifty times faster than 5G and ultra-low latency one-tenth that of 5G.

[0003] In the early stages of 5G mobile communication technology development, to support services and meet performance requirements related to enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC), and massive machine-type communication (mMTC), standardization was underway regarding beamforming and massive MIMO. This included mitigating radio wave path loss in millimeter waves and increasing transmission distance; supporting parameter sets for dynamic operation of millimeter wave resources and time slot formats (e.g., operating multiple subcarrier spacings); initial access technologies to support multi-beam transmission and broadband; the definition and operation of the bandwidth portion (BWP); new channel coding methods such as LDPC (low-density parity-check) codes for large data transmissions and polar codes for highly reliable transmission of control information; L2 preprocessing; and network slicing for providing dedicated networks for specific services.

[0004] Currently, given the services that 5G mobile communication technology needs to support, discussions are underway regarding improvements and performance enhancements to the initial 5G mobile communication technology. Physical layer standardization already exists for technologies such as V2X (Vehicle-to-Everything), New Radio Unlicensed (NR-U), NR UE power saving, Non-Terrestrial Networks (NTN), and positioning. V2X is used to assist autonomous vehicles in determining driving based on information sent by the vehicle regarding its location and status, and to enhance user convenience. NR-U (New Radio Unlicensed) aims to comply with the system operation requirements related to various regulations in unlicensed frequency bands. Non-Terrestrial Networks (NTN) is UE-satellite direct communication used to provide coverage in areas where communication with terrestrial networks is unavailable.

[0005] Furthermore, standardization is underway for air interface architectures / protocols such as Industrial Internet of Things (IIoT) for supporting new services through interoperability and convergence with other industries, IAB (Integrated Access and Backhaul) for providing nodes for network service area extension by supporting wireless backhaul and access links in an integrated manner, mobility enhancements including conditional handover and DAPS (Dual Active Protocol Stack) handover, and two-step random access (2-step RACH for NR) for simplifying the random access process. Standardization is also underway in system architectures / services for 5G baseline architectures (e.g., service-based architectures or service-based interfaces) for combining Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies, and for Mobile Edge Computing (MEC) for UE location-based reception services.

[0006] With the commercialization of 5G mobile communication systems, the already exponentially growing number of connected devices will connect to the communication network, thus necessitating enhanced functionality and performance of 5G mobile communication systems, as well as integrated operation of connected devices. To this end, new research related to extended reality (XR) has been arranged to effectively support AR (Augmented Reality), VR (Virtual Reality), MR (Mixed Reality), and other technologies by leveraging artificial intelligence (AI) and machine learning (ML), AI service support, metaverse service support, and drone communication, while also improving 5G performance and reducing complexity.

[0007] Furthermore, this development of 5G mobile communication systems will not only serve as the foundation for developing new waveforms to provide coverage in the terahertz band for 6G mobile communication technologies, such as full-dimensional MIMO (FD-MIMO), multi-antenna transmission technologies like array antennas and massive MIMO, metamaterial-based lenses and antennas to improve the coverage of terahertz band signals, high-dimensional spatial multiplexing technologies using OAM (orbital angular momentum), and RIS (reconfigurable smart surfaces), but also as the foundation for developing full-duplex technologies to improve the frequency efficiency of 6G mobile communication technologies and enhance system networks, AI-based communication technologies to achieve system optimization and internalize end-to-end AI support by leveraging satellites and AI (artificial intelligence) from the design stage, and next-generation distributed computing technologies to achieve services with complexity exceeding the operational capabilities of UEs by utilizing ultra-high-performance communication and computing resources. Summary of the Invention

[0008] [Technical Issues]

[0009] One aspect of this disclosure is to provide an apparatus and method for effectively providing a location estimation service to a UE in a wireless communication system.

[0010] [Technical Solution]

[0011] According to embodiments of this disclosure, a method performed by a terminal in a wireless communication system is provided. The method includes: receiving a radio resource control (RRC) message including configuration information regarding a combination of aggregated probe reference signal (SRS) resource sets; receiving a media access control-control element (MAC CE) for activating or deactivating the aggregated SRS resource sets; and transmitting SRS for positioning based on at least one aggregated SRS resource set activated by the MAC CE. The MAC CE includes first information indicating a combination of aggregated SRS resource sets and second information indicating the activation or deactivation state of each aggregated SRS resource set.

[0012] According to embodiments of this disclosure, a method performed by a base station in a wireless communication system is provided. The method includes sending an RRC message including configuration information about a combination of aggregated SRS resource sets, sending a MAC CE for activating or deactivating the aggregated SRS resource sets, and receiving SRS for positioning based on at least one aggregated SRS resource set activated by the MAC CE. The MAC CE includes first information indicating a combination of aggregated SRS resource sets and second information indicating the activation or deactivation state of each aggregated SRS resource set.

[0013] According to embodiments of this disclosure, a terminal in a wireless communication system is provided. The terminal includes a transceiver and a controller. The controller is configured to receive, via the transceiver, an RRC message including configuration information about a combination of aggregated SRS resource sets, receive via the transceiver a MAC CE for activating or deactivating aggregated SRS resource sets, and transmit SRS for positioning based on at least one aggregated SRS resource set activated by the MAC CE. The MAC CE includes first information indicating a combination of aggregated SRS resource sets and second information indicating the activation or deactivation state of each aggregated SRS resource set.

[0014] According to embodiments of this disclosure, a base station in a wireless communication system is provided. The base station includes a transceiver and a controller. The controller is configured to transmit, via the transceiver, an RRC message including configuration information about a combination of aggregated SRS resource sets; transmit via the transceiver a MAC CE for activating or deactivating aggregated SRS resource sets; and receive, via the transceiver, SRS for location based on at least one aggregated SRS resource set activated by the MAC CE. The MAC CE includes first information indicating a combination of aggregated SRS resource sets and second information indicating the activation or deactivation state of each aggregated SRS resource set.

[0015] [Beneficial Effects]

[0016] This disclosure provides an apparatus and method for effectively providing services in a wireless communication system. Attached Figure Description

[0017] Figure 1 The structure of an LTE system according to an embodiment of the present disclosure is shown.

[0018] Figure 2 Radio protocol structures in LTE and NR systems according to embodiments of this disclosure are shown.

[0019] Figure 3 A network architecture for providing UE location services (LCS) in a next-generation mobile communication system is illustrated according to embodiments of the present disclosure.

[0020] Figure 4 This is a flowchart illustrating the process of performing LCS in a next-generation mobile communication system according to an embodiment of the present disclosure.

[0021] Figure 5 This is a flowchart illustrating the process of exchanging LTE Location Protocol (LPP) messages between a UE and a Location Management Function (LMF) according to an embodiment of the present disclosure.

[0022] Figure 6 The process of transmitting a probe reference signal (SRS) for a UE configured for location estimation according to an embodiment of the present disclosure is illustrated.

[0023] Figure 7 A scenario is illustrated where the location of a UE is estimated based on UL-SRS transmitted by the UE, according to an embodiment of the present disclosure.

[0024] Figure 8 The illustration depicts a scenario where different UL-SRSs are transmitted via different carriers (or serving cells) according to embodiments of the present disclosure.

[0025] Figure 9 This is a flowchart illustrating a signaling process for UE location estimation using UL-SRS BW aggregation according to an embodiment of the present disclosure.

[0026] Figure 10 The UL-SRS configuration information element included in the RRCReconfiguration message according to an embodiment of the present disclosure is shown.

[0027] Figure 11 The configuration of an aggregated UL-SRS resource set according to an embodiment of the present disclosure is shown.

[0028] Figure 12A An exemplary structure for activating or deactivating a MACCE for an aggregated UL-SRS resource set according to an embodiment of the present disclosure is shown.

[0029] Figure 12BAn exemplary structure for activating or deactivating a MACCE for an aggregated UL-SRS resource set according to an embodiment of the present disclosure is shown.

[0030] Figure 12C An exemplary structure for activating or deactivating a MACCE for an aggregated UL-SRS resource set according to an embodiment of the present disclosure is shown.

[0031] Figure 13 A UE device according to an embodiment of the present disclosure is shown.

[0032] Figure 14 A base station device according to an embodiment of the present disclosure is shown. Detailed Implementation

[0033] In the following, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Furthermore, in describing the present disclosure, detailed descriptions of known functions or configurations will be omitted where it is determined that the description might unnecessarily obscure the subject matter of the disclosure. The terminology described below is defined in consideration of the functions in the present disclosure and may vary depending on the user, the user's intent, or habits. Therefore, definitions should be based on the entire contents of this specification.

[0034] The advantages and features of this disclosure, as well as methods of implementing them, will become apparent from the embodiments described in detail below with reference to the accompanying drawings. However, this disclosure is not limited to the embodiments set forth below, but can be implemented in various different forms. The following embodiments are provided only to fully disclose this disclosure and to inform those skilled in the art of its scope, and this disclosure is limited only by the scope of the appended claims. Throughout the specification, the same or similar reference numerals denote the same or similar elements.

[0035] In this document, it will be understood that each block shown in the flowchart, and combinations of blocks shown in the flowchart, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in one or more flowchart blocks. These computer program instructions can also be stored in a computer-usable or computer-readable storage medium that can instruct the computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-usable or computer-readable storage medium produce an article of writing comprising instruction means for implementing the functions specified in one or more flowchart blocks. The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus, thereby producing a computer-implemented process, such that the instructions, which execute on the computer or other programmable apparatus, provide steps for implementing the functions specified in the flowchart blocks.

[0036] Furthermore, each box in the flowchart can represent a module, segment, or section of code, which includes one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions mentioned in the boxes may occur out of order. For example, depending on the functions involved, two boxes shown consecutively may actually execute substantially simultaneously, or these boxes may sometimes execute in reverse order.

[0037] As used in embodiments of this disclosure, the term "unit" refers to a software element or hardware element, such as a field-programmable gate array (FPGA) or application-specific integrated circuit (ASIC), and a "unit" can perform certain functions. However, "unit" is not always limited to software or hardware. A "unit" can be configured to be stored in addressable storage media or to run one or more processors. Thus, a "unit" includes, for example, software elements, object-oriented software elements, class elements or task elements, processes, functions, attributes, procedures, subroutines, program code segments, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and parameters. Elements and functions provided by a "unit" can be combined into a smaller number of elements or "units," or divided into a larger number of elements or "units." Furthermore, elements and "units" can be implemented as one or more CPUs within a playback device or secure multimedia card. Additionally, a "unit" in the embodiments may include one or more processors.

[0038] In describing this disclosure below, detailed descriptions of known functions or configurations incorporated herein will be omitted where it is determined that the description may unnecessarily obscure the subject matter of this disclosure. Embodiments of this disclosure will be described below with reference to the accompanying drawings.

[0039] In the following description, for ease of description, terms for identifying access nodes, referring to network entities, referring to messages, referring to interfaces between network entities, referring to various types of identification information, etc., are used illustratively. Therefore, this disclosure is not limited to the terms described below, and other terms referring to objects with equivalent technical meanings may also be used.

[0040] In the following description, the terms "physical channel" and "signal" may be used interchangeably with the terms "data" or "control signal." For example, the term "physical downlink shared channel (PDSCH)" refers to the physical channel on which data is transmitted, but PDSCH can also be used to refer to "data." That is, in this disclosure, the expression "transmitting physical channel" can be interpreted as having the same meaning as the expression "transmitting data or signals through a physical channel."

[0041] In the following description of this disclosure, higher-layer signaling refers to a signal transmission scheme from a base station to a terminal via a downlink data channel of the physical layer, or a signal transmission scheme from a terminal to a base station via an uplink data channel of the physical layer. Higher-layer signaling can also be understood as Radio Resource Control (RRC) signaling or Media Access Control (MAC) control elements (CE).

[0042] In the following description of this disclosure, for ease of description, terms and names defined in the 3GPP New Radio (3GPP NR) or 3GPP Long Term Evolution (3GPP LTE) standards will be used. However, this disclosure is not limited to these terms and names and can be applied in the same manner to systems conforming to other standards. In this disclosure, for ease of description, the term "gNB" may be used interchangeably with the term "eNB." That is, a base station described as "eNB" may refer to a "gNB." Furthermore, the term "terminal" may refer not only to mobile phones, MTC devices, NB-IoT devices, and sensors, but also to other wireless communication devices.

[0043] In the following description, a base station is an entity that allocates resources to terminals and can be at least one of a gNode B (gNB), an eNodeB (eNB), a node B, a base station (BS), a radio access unit, a base station controller, and a node on a network. A terminal can include a user equipment (UE), a mobile station (MS), a cellular phone, a smartphone, a computer, or a multimedia system capable of performing communication functions. However, the base station is not limited to the examples described above.

[0044] Specifically, this disclosure can be applied to 3GPP NR (5th generation mobile communication standard). Additionally, this disclosure can be applied to smart services based on 5G communication technology and IoT-related technologies (e.g., smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail businesses, security and safety-related services, etc.). In this disclosure, for ease of description, the term "eNB" can be used interchangeably with the term "gNB." That is, a base station described as "eNB" can refer to a "gNB." Furthermore, the term "terminal" can refer not only to mobile phones, NB-IoT devices, and sensors, but also to any other wireless communication device.

[0045] Wireless communication systems are evolving towards broadband wireless communication systems, using communication standards such as 3GPP High-Speed ​​Packet Access (HSPA), LTE (Long Term Evolution or Evolved Universal Terrestrial Radio Access (E-UTRA)), LTE-A Advanced, LTE-Pro, 3GPP2 High-Rate Packet Data (HRPD), Ultra Mobile Broadband (UMB), IEEE 802.16e, and typical voice-based services to provide high-speed and high-quality packet data services.

[0046] As a typical example of a broadband wireless communication system, the LTE system employs an Orthogonal Frequency Division Multiplexing (OFDM) scheme in the downlink (DL) and a Single-Carrier Frequency Division Multiple Access (SC-FDMA) scheme in the uplink (UL). The uplink refers to the radio link through which a User Equipment (UE) or Mobile Station (MS) transmits data or control signals to a Base Station (BS) (or eNode B), and the downlink refers to the radio link through which the Base Station transmits data or control signals to the UE. These multiple access schemes separate the data or control information of each user by allocating and operating time-frequency resources for transmitting data or control information to each user, thereby avoiding overlap and establishing orthogonality.

[0047] As a post-LTE communication system, 5G communication systems must freely reflect the various requirements of users, service providers, and others, and therefore must support services that meet diverse needs. Services considered in 5G communication systems include enhanced mobile broadband (eMBB) communication, massive machine-type communication (mMTC), and ultra-reliable low-latency communication (URLLC), among others.

[0048] According to some embodiments, eMBB may be designed to provide data rates higher than those supported by existing LTE, LTE-A, or LTE-Pro. For example, in 5G communication systems, eMBB must provide a peak data rate of 20 Gbps in the downlink and 10 Gbps in the uplink for a single base station. Furthermore, 5G communication systems must provide increased user-aware data rates to the UE, as well as a maximum data rate. To meet these requirements, improved transmit / receive technologies, including further enhanced multiple-input multiple-output (MIMO) transmission technologies, may be necessary. Additionally, the data rates required by 5G communication systems can be achieved using frequency bandwidths greater than 20 MHz in the 3 to 6 GHz band or 6 GHz or higher, instead of using up to 20 MHz of transmission bandwidth in the 2 GHz band used in LTE.

[0049] Furthermore, mMTC support for application services such as the Internet of Things (IoT) in 5G communication systems is being considered. To effectively deliver IoT, mMTC may have requirements such as supporting a large number of UEs within a cell, enhancing UE coverage, improving battery life, and reducing UE costs. Since IoT provides communication capabilities while being supplied to various sensors and devices, it must support a large number of UEs within a cell (e.g., 1,000,000 UEs / km). 2 Additionally, mMTC-enabled UEs may require wider coverage than other services offered by 5G communication systems because the UE may be located in shadow areas, such as building basements, which are not covered by the cell due to the nature of the service. mMTC-enabled UEs must be configured to be inexpensive and may require very long battery life, such as 10 to 15 years, because it is difficult to frequently replace the UE's battery.

[0050] Finally, URLLC, as a cellular-based mission-critical wireless communication service, can be used for remote control of robots or machines, industrial automation, unmanned aerial vehicles, remote healthcare, emergency alarms, and more. Therefore, URLLC must provide communication with very low latency (ultra-low latency) and high reliability (ultra-high reliability). For example, services supporting URLLC must meet an air interface latency of less than 0.5ms and may also require 10... -5 Or even lower packet error rates. Therefore, for services that support URLLC, 5G systems must provide shorter transmission time intervals (TTIs) than other services, and may also require designs that allocate significant resources in the frequency band to ensure the reliability of the communication link.

[0051] The three services considered in 5G communication systems—eMBB, URLLC, and mMTC—can be multiplexed and transmitted within a single system. In this case, different transmit / receive technologies and parameters can be used between services to meet their varying requirements. However, mMTC, URLLC, and eMBB are merely examples of different service types, and the types of services to which this disclosure applies are not limited to these examples.

[0052] Furthermore, in the following description of embodiments of this disclosure, LTE, LTE-A, LTE Pro, or 5G (or NR, next-generation mobile communication) systems will be described by way of example. However, the embodiments of this disclosure can also be applied to other communication systems with similar backgrounds or channel types. Moreover, based on the determination of those skilled in the art, the embodiments of this disclosure can also be applied to other communication systems with some modifications without significantly departing from the scope of this disclosure.

[0053] Figure 1 The structure of an LTE system according to an embodiment of the present disclosure is shown.

[0054] refer to Figure 1 The wireless communication system may include multiple base stations (e.g., gNB 1-05, ng-eNB 1-10, ng-eNB 1-15, and gNB 1-20), Access and Mobility Management Functions (AMF) 1-25, and User Plane Functions (UPF) 1-30. The wireless communication system is not limited to... Figure 1 The structure shown in the figure can include more than Figure 1 The structure may have more or fewer components. User equipment (hereinafter referred to as UE or terminal) 1-35 can access external networks through base stations (e.g., gNB 1-05, ng-eNB 1-10, ng-eNB 1-15 and gNB 1-20) and UPF 1-30.

[0055] exist Figure 1 In this context, base stations (e.g., gNB 1-05, ng-eNB 1-10, ng-eNB 1-15, and gNB 1-20) can act as cellular network access nodes to provide radio access to UEs accessing the network. That is, to serve user traffic, base stations (e.g., gNB 1-05, ng-eNB 1-10, ng-eNB 1-15, and gNB 1-20) can collect UE state information, such as buffer state, available transmission power state, and channel state, and perform scheduling accordingly to support the connection between the UE and the core network (CN; specifically, the CN in NR is referred to as "5GC").

[0056] exist Figure 1In this context, gNB 1-05 and 1-20 can control multiple cells and employ an adaptive modulation and coding (AMC) scheme to determine the modulation scheme and channel coding rate based on the UE's channel state.

[0057] The core network is responsible for various control functions and UE mobility management functions, and can connect to multiple base stations. Furthermore, the 5GC can interoperate with legacy LTE systems.

[0058] Wireless communication systems can be divided into a user plane (UP) associated with actual user data transmission and a control plane (CP) such as connection management. gNB 1-05 and gNB 1-20 can use the UP and CP technologies defined in NR technology, and although connected to 5GC, ng-eNB 1-10 and ng-eNB 1-15 can use the UP and CP technologies defined in LTE technology.

[0059] AMF 1-25 is a device responsible for various control functions and UE mobility management functions, and can connect to multiple base stations, while UPF 1-30 can refer to a class of gateway devices used to provide data transmission. Although in Figure 1 Although not shown, NR wireless communication systems may include Session Management Function (SMF). SMF can manage packet data network connections provided to the UE, such as Protocol Data Unit (PDU) sessions.

[0060] Figure 2 Radio protocol structures in LTE and NR systems according to embodiments of this disclosure are shown.

[0061] refer to Figure 2 The radio protocols of an LTE system may include Packet Data Convergence Protocol (PDCP) 2-05 or 2-40, Radio Link Control (RLC) 2-10 or 2-35, and Media Access Control (MAC) 2-15 or 2-30 on each of the UE and eNB sides.

[0062] Packet Data Convergence Protocol (PDCP) 2-05 or 2-40 can handle operations such as IP header compression / reconstruction. It can also provide in-order or out-of-order delivery, reordering, deduplication detection, retransmission, or encryption and decryption functions. The functionality of PDCP is not limited to the examples mentioned above.

[0063] Radio Link Control (RLC) 2-10 or 2-35 can reconfigure PDCP Protocol Data Units (PDUs) to an appropriate size and can provide in-order or out-of-order delivery, ARQ, concatenation, fragmentation, reassembly, refraction, reordering, duplicate detection, or error detection. The functionality of RLC is not limited to the examples above.

[0064] MAC 215 or 230 connects to several RLC layer devices configured in a single UE and performs operations such as multiplexing RLC PDUs into MAC PDUs and demultiplexing RLC PDUs from MAC PDUs. In addition, the MAC can provide mapping functions, scheduling information reporting functions, HARQ functions, priority handling functions between logical channels, priority handling functions between UEs, MBMS service identification functions, transport format selection functions, and padding functions. The functions of the MAC are not limited to the examples above.

[0065] Physical (PHY) layer 2-20 or 2-25 can perform channel coding and modulation operations on upper-layer data to obtain OFDM symbols, which are then delivered via radio channels, or demodulate OFDM symbols received via radio channels, perform channel decoding, and deliver them to the upper layer. For additional error correction, the PHY layer can also use Hybrid ARQ (HARQ), and the receiver can use a single bit to indicate whether a packet sent by the transmitter has been received. This is called HARQ AQCK / NACK information. In the case of LTE, downlink HARQ ACK / NACK information in response to uplink data transmission can be sent via the Physical ARQ Indicator Channel (PHICH), and in the case of NR, due to the application of asynchronous HARQ, the Physical Dedicated Control Channel (PDCCH) can be used to determine whether a retransmission is required or only a new transmission is necessary, based on UE scheduling information. This PDCCH is the channel through which downlink / uplink resource allocation, etc., is transmitted. Uplink HARQ ACK / NACK information in response to downlink data transmission can be sent via the Physical Uplink Control Channel (PUCCH) or via the Physical Uplink Shared Channel (PUSCH). The PUCCH is typically sent in the uplink of the PCell described below, but if the PUCCH is supported by the UE, the base station can also send it to the corresponding UE in the SCell described below (referred to as the PUCCH SCell).

[0066] Although not shown in the accompanying drawings, the Radio Resource Control (RRC) layer may exist as a layer higher than each PDCP layer of the UE and the base station, and the RRC layer may exchange access / measurement related configuration control messages for radio resource control.

[0067] The PHY layer can include one or more frequencies / carriers, and the technique for configuring and using multiple frequencies simultaneously is called carrier aggregation (hereinafter referred to as CA). CA refers to a technique in which, instead of using only one carrier for communication between the UE and the E-UTRAN Node B (eNB), a primary carrier and multiple secondary carriers are used in combination, and thus the data capacity can be greatly increased as much as the number of secondary carriers. In LTE and NR systems, a cell in a base station using the primary carrier can be called a primary cell or PCell, and a cell in a base station using secondary carriers can be called a secondary cell or SCell.

[0068] Furthermore, although not shown in the accompanying drawings, NR's radio protocol may also include Service Data Adaptation (SDAP). SDAP can provide the following functions: delivering user plane data, mapping QoS flows and data bearers for both uplink and downlink, and mapping reflected QoS flows to data bearers for uplink SDAP PDUs. The functionality of SDAP is not limited to the examples above.

[0069] Figure 3 A network architecture for providing UE location estimation services (Location Services (LCS)) in a wireless communication system is illustrated according to an embodiment of the present disclosure.

[0070] refer to Figure 3 In a mobile communication system, the network used to provide LCS may include UE 3-00, NG-RAN node 3-05, Access and Mobility Function (AMF) 3-10, and Location Management Function (LMF) 3-15. UE 3-00 can then communicate with LMF 3-15 through NG-RAN node 3-05 and AMF 3-10 to send / receive information required for location estimation. The role of each entity used to provide LCS can be, for example, as follows.

[0071] UE 3-00 can be used to measure the radio signals required for location estimation and transmit the results to LMF 3-15.

[0072] NG-RAN node 3-05 can be used to transmit downlink radio signals required for location estimation and to measure uplink radio signals transmitted by the target UE.

[0073] AMF 3-10 can be used to receive LCS request messages from an LCS requester and then forward the LCS request message to LMF 3-15 to instruct it to provide location services. When LMF 3-15 processes the location estimation request and responds to the UE with the location estimation result, AMF 3-10 can forward the corresponding result to the LCS requester.

[0074] LMF 3-15 can receive LCS requests from AMF 3-10 to process them and can be used to control the overall process required for location estimation. To estimate the UE's location, LMF 3-15 can provide UE 3-00 with auxiliary information required for location estimation and signal measurement, and can receive the location estimation results and location estimation signal measurement results. At this time, the LTE Positioning Protocol (LPP) can be used as the protocol for data exchange. LPP can define the specifications of messages exchanged between UE 3-00 and LMF 3-15 for location estimation services. Furthermore, LMF 3-15 can send and receive downlink reference signal (positioning reference signal (PRS)) configuration information and uplink reference signal (sound reference signal, SRS) measurement results for location estimation from NG RAN node 3-05. At this time, NR Positioning Protocol A (NRPPa) can be used as the protocol for data exchange, and NRPPa can define the specifications of messages sent and received between NG-RAN node 3-05 and LMF 3-15. LMF 3-15 can be referred to as an LMF entity as a network entity.

[0075] Figure 4 This is a flowchart illustrating the process of performing LCS in a wireless mobile communication system according to an embodiment of the present disclosure.

[0076] refer to Figure 4 AMF 4-05 can receive LCS requests 4-20a, 4-20b, and 4-20c and then forward them to LMF 4-07. LMF 4-07 then controls the process of exchanging necessary information with the UE and NG RAN nodes to process LCS requests 4-20a, 4-20b, and 4-20c, and transmits the resulting values ​​(location estimation results) to AMF 4-05. When AMF 4-05 transmits the resulting values ​​(location estimation results) to the target that requested the LCS, the LCS is completed.

[0077] The LCS requests received by AMF 4-05 in Operation 4-20 can include the following three types.

[0078] 1. LCS request 4-20a received from external LCS client 4-10

[0079] 2. AMF 4-05 itself generates LCS request 4-20b

[0080] 3. LCS request 4-20c received from UE 4-00

[0081] LCS requests may include the ID of the target UE in the LCS and LCS quality of service (QoS) request information (e.g., location estimation accuracy and latency requirements).

[0082] Upon receiving one of the three types of LCS requests, AMF 4-05 can send a Location Service Request message 4-25 to LMF 4-07 to request location estimation services.

[0083] Then, during the operation of NG-RAN node procedure 4-30, LMF 4-07 can perform the procedures required for location estimation (e.g., NG RAN node PRS configuration, NG-RAN node SRS measurement information acquisition, etc.) by exchanging NRPPa messages with NG-RAN node 4-03.

[0084] Additionally, during the operation of UE procedure 4-35, LMF 4-07 can send and receive LPP messages to exchange necessary information elements with UE 4-00. For example, LMF 4-07 can receive UE capability information related to location estimation and perform procedures for sending auxiliary information for UE signal measurements and requesting and obtaining UE measurement results.

[0085] When the estimated location of the UE is determined based on several measurement results obtained by LMF 4-07, LMF 4-07 can transmit the location service response message 4-40 to AMF 4-05.

[0086] AMF 4-05 can transmit LCS response messages 4-45a, 4-45b, and 4-45c to the target that requested the LCS, and LCS response messages 4-45a, 4-45b, and 4-45c may include UE location estimation results.

[0087] The names of the requests or messages described in this disclosure are not limited to those described in this disclosure, and requests or messages may be expressed by other names based on their characteristics or attributes. Alternatively, first request (or message), second request (or message), etc., may be expressed.

[0088] Figure 5 This is a flowchart illustrating the process of exchanging LTE Location Protocol (LPP) messages between a UE and a Location Management Function (LMF) according to an embodiment of the present disclosure.

[0089] refer to Figure 5 It shows that in Figure 4The process of exchanging LTE Location Protocol (LPP) messages in UE procedure 4-35 is described below. For example, LMF 5-05 may perform the following procedures: exchanging UE capability information related to location estimation with UE 5-00, sending auxiliary information for UE signal measurement, and requesting and obtaining UE measurement results. Examples of the purpose and definition of each LPP message sent and received in each operation are as follows.

[0090] LPP Request Capabilities (LMF->UE 5-10): This can be used by LMF 5-05 to request UE capability information elements related to location estimation from UE 5-00. The information included in the message can be defined as shown, for example, in [Table 1] below. Regardless of the location estimation method (e.g., Global Navigation Satellite System (GNSS), Observed Time Difference of Arrival (OTDOA), Enhanced Cell Identifier (ECID), etc.), requests for common information are included in a predefined message (e.g., CommonIEsRequestCapabilities), and requests for additional information required for each location estimation method can be included in a separate parameter or information element (IE) for each method.

[0091] [Table 1]

[0092]

[0093]

[0094] LPP Provide Capabilities (UE->LMF 5-15): This can be used to transmit UE capability information elements requested by UE5-00 from LMF 5-05. The information included in the message can be defined as shown, for example, in [Table 2] below. Similar to the LPP Request Capabilities message, common information independent of the location estimation method can be included in commonIEsProvideCapabilities, and the information elements requested for each location tracking method can be included in separate parameters or IEs.

[0095] [Table 2]

[0096]

[0097] LPP requestAssistanceData (UE→LMF, 5-17): UE 5-00 can use this to request information elements needed or helpful for measuring radio signals used for location estimation from LMF 5-05. The information included in the message can be defined as shown, for example, in [Table 3]. Common information unrelated to the location estimation method is included in commonIEsRequestAssistanceData, and the information elements requested for each location tracking method can be included in separate parameters or IEs. Meanwhile, in some cases, the LPP requestAssistanceData message may not be sent.

[0098] [Table 3]

[0099]

[0100] LPP ProvideAssistanceData (LMF->UE, 5-20): Information elements that can be used by LMF 5-05 to provide necessary or helpful information for measuring radio signals used for location estimation of UE 5-00. Information included in the message can be defined as shown, for example, in [Table 4]. Common information independent 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.

[0101] [Table 4]

[0102]

[0103]

[0104] LPP Request Location Information (LMF→UE, 5-25): This can be used by LMF 5-05 to request the signals and location estimation results needed for the measurement location estimation from UE 5-00. LMF 5-05 can determine, for example, which location estimation method to use, which measurement the UE should perform for this purpose, what results to provide, and how to respond, and then include the relevant information elements in the message and transmit the message to UE 5-00. The information included in the message can be defined as shown, for example, in [Table 5].

[0105] [Table 5]

[0106]

[0107]

[0108] LPP provides location information (UE→LMF, 5-30): This information can be used by UE 5-00 to send requested measurement results and location estimation results received from LMF 5-05 to LMF 5-05. The information included in the message can be defined as shown, for example, in [Table 6].

[0109] [Table 6]

[0110]

[0111] The names of requests or messages described in this disclosure are not limited to those described in this disclosure, and requests or messages may be expressed by other names based on their characteristics or attributes.

[0112] Figure 6 This is a diagram illustrating the process of transmitting a probe reference signal (SRS) for a UE configured for location estimation according to an embodiment of the present disclosure.

[0113] refer to Figure 6 This illustrates the process by which the LMF 6-04 configures the UE 6-01 to perform at least one of the required probe reference signal (SRS) transmissions for the UL location estimation method (positioning method) or the DL+UL positioning method. Depending on the system configuration and / or definition, Figure 6 The operations shown may not all be included, and some operations may be omitted.

[0114] UL positioning methods can refer to methods that estimate the location of a UE based on uplink signals transmitted by the UE. For example, the method may include a method in which the UE transmits an SRS signal via the uplink and estimates the UE's location based on SRS measurement information (or measurement result values) obtained by a gNB / transmitter-receiver point (TRP) that has received (or measured) the SRS signal transmitted by the UE.

[0115] DL+UL positioning refers to a method of estimating a UE's location based on downlink signals transmitted by the gNB / TRP and uplink signals transmitted by the UE. For example, the gNB / TRP can transmit a Position Reference Signal (PRS) via the downlink. The UE receiving the PRS transmitted by the gNB / TRP can obtain PRS measurement information (or measurement result values). Similarly, the UE can transmit an SRS signal via the uplink, and the gNB / TRP receiving (or measuring) the SRS signal transmitted by the UE can obtain SRS measurement information (or measurement result values). Subsequently, the location of the corresponding UE can be estimated using both the PRS measurement information (or measurement result values) measured by the UE and the SRS measurement information (or measurement result values) measured by the gNB / TRP.

[0116] Therefore, in order to estimate the UE's location using at least one of the UL positioning method or the UL+DL positioning method, a procedure for configuring the UE to send SRS needs to be performed. The procedure performed in each operation will be described below.

[0117] In operation 6-05, LMF 6-04 can exchange NRPPaTRP configuration information with service gNB / TRP 6-02 and neighboring cell gNB / TRP 6-03 (NRPPaTRP Configuration Information Exchange).

[0118] LMF 6-04 can obtain the information required to perform the UL positioning method from the serving gNB / TRP 6-02 and the neighboring gNB / TRP 6-03. The information required to perform the UL positioning method may include at least one of NR cell information, PRS configuration, spatial orientation information, and location information.

[0119] In Operation 6-10, LMF 6-04 can exchange UE capability information with UE 6-01 (LPP Capability Transfer).

[0120] LMF 6-04 can request and receive UE capability information related to location estimation from UE 6-02.

[0121] In operation 6-15, LMF 6-04 can send an NRPPa POSITIONING INFORMATION REQUEST message to service gNB / TRP 6-02.

[0122] The NRPPa location information request message sent by LMF 6-04 may include information for determining the UE's SRS transmission resource configuration required for UL positioning based on information already collected by the LMF (e.g., location information of neighboring cell TRPs, existing UE location information of the UE, SSB / PRS transmission information of TRPs, etc.) and requesting it from the serving gNB / TRP 6-02. This message may include information about at least one of the following: the quantity, periodicity, path loss reference, and spatial relationships of the required SRS resources.

[0123] In Operation 6-20, Service gNB / TRP 6-02 can finally determine the SRS resources used by the UE to send SRS (gNB Determines UL SRS Resources).

[0124] After receiving the NRPPa location information request message from LMF 6-04, the serving gNB / TRP 6-02 can ultimately determine the SRS resources to be configured for the UE based on the received message.

[0125] In Operation 6-25, Service gNB / TRP 6-02 can transmit the SRS resource configuration information (or SRS resource transport configuration information or UE SRS configuration) determined in Operation 6-20 to UE 6-01.

[0126] Service gNB / TRP 6-02 can transmit SRS resource configuration information to UE 6-01 via RRC signaling.

[0127] In operation 6-30, service gNB / TRP 6-02 can send an NRPPa POSITIONING INFORMATION RESPONSE message to LMF 6-04.

[0128] The NRPPa location information response message sent by service gNB / TRP 6-02 can be used to transmit to the LMF the SRS resource configuration information (e.g., the location, periodicity, spatial relationship information of the SRS resources on the time / frequency axis, etc.) that was ultimately transmitted to UE 6-01 by service gNB / TRP 6-02 in operation 6-25.

[0129] In operation 6-35, LMF 6-04 can send an NRPPa POSITIONING ACTIVATION REQUEST message to service gNB / TRP 6-02.

[0130] When UE 6-02 has been configured to send semi-persistent SRS or aperiodic SRS, LMF 6-04 can use the NRPPa location activation request message to request the serving gNB / TRP 6-02 to activate the SRS transmission of UE 6-01.

[0131] In Operation 6-40, Service gNB / TRP 6-02 can configure the activation of SRS transmission for UE 6-01 (Activate UE SRS transmission).

[0132] The service gNB / TRP 6-02 that receives the NRPPa location activation request message can indicate SRS activation to UE 6-40 via Media Access Control (MAC) Control Element (CE) or Downlink Control Information (DCI).

[0133] In operation 6-45, service gNB / TRP 6-02 can send an NRPPA POSITIONING ACTIVATION RESPONSE message to UE 6-01.

[0134] The NRPPa location activation response message can be used by service gNB / TRP 6-02 to respond to the NRPPa location activation request message by sending information indicating whether SRS activation is complete (or SRS activation complete) to LMF 6-04.

[0135] In operation 6-55, LMF 6-04 can send an NRPPa measurement request message.

[0136] LMF 6-04 can use the NRPPa measurement request message to request measurements of SRS sent by the UE and report the results to serving gNB / TRP 6-02 and neighboring cell gNB / TRP 6-03. In this case, the NRPPa measurement request message can also include SRS resource information configured for UE 6-01.

[0137] In Operation 6-60, the serving gNB / TRP 6-02 and the neighboring cell gNB / TRP 6-03 can measure the SRS (UL SRS measurement) sent by the UE 6-01.

[0138] The service gNB / TRP 6-02 and neighboring cell gNB / TRP 6-03, which receive a request for SRS measurement from LMF 6-04 via NRPPa Measurement Request Message, can measure the SRS sent by UE6-01 based on the SRS configuration information included in the NRPPa Measurement Request Message.

[0139] In operation 6-65, the serving gNB / TRP 6-02 and the neighboring gNB / TRP 6-03 can send an NRPPa measurement response message to LMF 6-04.

[0140] The NRPPa measurement response message can be used to send the results of the requested SRS measurement received by service gNB / TRP 6-02 and neighboring cell gNB / TRP 6-03 from LMF 6-04 in operation 6-55 to LMF 6-04.

[0141] In operation 6-70, LMF 6-04 can send the NRPPa POSITIONING DEACTIVATION message to service gNB / TRP 6-02.

[0142] The NRPPa location deactivation message can be sent by LMF 6-04 to service gNB / TRP 6-02 to deactivate the SRS transmission requested in operation 6-35 after LMF 6-04 has completed the location estimation technique operation.

[0143] Figure 7 This is a diagram illustrating a scenario in which the location of a UE is estimated based on UL-SRS transmitted by the UE, according to an embodiment of the present disclosure.

[0144] refer to Figure 7 UE 7-00 can send UL-SRS 7-11, 7-12, and 7-13 to multiple different TRPs 7-03, 7-05, and 7-07 respectively. Timing information (reception time information) of the UL-SRS received by each TRP can be reported to the LMF, and the LMF can use this information to estimate the location of the corresponding UE. For example, in the case of a location estimation method using an uplink time difference of arrival (UL-TDOA) scheme, the LMF can measure and calculate the difference in time (reference signal timing difference (RSTD)) between the times when each TRP has received the UL-SRS simultaneously sent by the UE. In this embodiment, three RSTD values ​​can be measured and calculated for each TRP pair receiving UL-SRS sent by the UE to three different TRPs. Subsequently, a hyperbola 7-15 can be generated by connecting the locations of the measured RSTD values ​​with lines for each RSTD, and the UE can be estimated to be located in the overlapping region of the three hyperbolas 7-15.

[0145] Schemes for estimating the UE's location using information about the timing of the UL-SRS received by different TRPs from the UE can include UL-TDOA, multi-RTT, etc. In the multi-RTT scheme, the UE's location is estimated using the round-trip time (RTT) value measured during the process of the UE receiving the DL-PRS transmitted by the TRP and the TRP receiving the UL-SRS transmitted by the UE. In this case, based on the RTT value measured between each TRP and the UE, circles are generated by connecting the locations with lines that can measure the corresponding RTT values, and it can be estimated that the UE is located in an area where multiple circles overlap. In the UL-TDOA and multi-RTT schemes, the UE's location is estimated based on information about the timing of the TRP receiving the UL-SRS signal transmitted by the UE for location estimation. Therefore, the degree to which the TRP accurately detects the UL-SRS signal and precisely measures the detection time when receiving radio signals can affect the accuracy of location estimation. Furthermore, using a wider bandwidth to transmit UL-SRS can further improve UL-SRS detection performance and detection timing measurement accuracy. Therefore, to improve the accuracy of UE location estimation, UL-PRS transmitted via different carriers (or serving cells) can be aggregated. The following will refer to Figure 1 H describes the method for polymerizing UL-PRS in more detail.

[0146] Figure 8 This is a diagram illustrating a scenario where different UL-SRSs are transmitted via different carriers (or serving cells) according to embodiments of the present disclosure.

[0147] Reference Figure 8 To improve location estimation accuracy when using location estimation schemes based on UL-SRS reception time points (e.g., UL-TDOA, multiple RTT, etc.), UL-SRS transmitted through different (or serving cells) channels can be aggregated. When UL-SRS transmitted through different (or serving cells) channels are aggregated, the TRP can identify the corresponding UL-SRS as an aggregated UL-SRS in the frequency domain, detect the UL-SRS, and measure the detection time point.

[0148] For example, when UL-SRS1 8-01 with sequence length N is transmitted using bandwidth 1 (bandwidth #1) on carrier X and UL-SRS2 8-02 with sequence length Y is transmitted using bandwidth 2 (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, the TRP can perform joint measurements (or aggregated measurements) on UL-SRS1 and UL-SRS2. When the TRP performs joint measurements on UL-SRS1 8-01 and UL-SRS2 8-02, the TRP can identify UL-SRS1 and UL-SRS2 as a single UL-SRS transmitted using bandwidth #1 + bandwidth #2 with a length of N+M, and perform UL-SRS detection and detection time point measurements.

[0149] Generally, when a wider bandwidth is used to transmit radio signals in the frequency domain, higher resolution is achieved in the time domain. Therefore, when a TRP performs joint measurements on aggregated UL-SRS1 and UL-SRS2, the TRP can more accurately detect the time point at which the aggregated UL-SRS was detected. Additionally, generally, the longer the sequence length of the reference signal (RS), the better the performance of detecting the RS in the radio signal received by the TRP. Therefore, by aggregating different UL-SRS transmitted via different carriers, the accuracy of position estimation can be improved when using position estimation schemes based on the UL-SRS reception time point (e.g., UL-TDOA, multiple RTT, etc.). For the sake of description, the operation of aggregating different UL-SRS transmitted via different carriers to improve position accuracy will be simply referred to as "UL-SRS BW aggregation". The aggregated UL-SRS is denoted as "aggregated UL-SRS", and the carrier through which the aggregated UL-SRS is transmitted is denoted as the "aggregated carrier".

[0150] To aggregate different UL-SRS transmitted via different carriers into a single UL-SRS in the frequency domain, the distance between the transmitted resources of the UL-SRS to be aggregated in the frequency domain (8-05, protection size) can be guaranteed to be at a certain level (e.g., 12 resource elements) or less. UL-SRS BW aggregation can be performed on two or more (e.g., 2 or 3) consecutive carriers located in the same frequency band in the frequency domain. Additionally, aggregation can be performed on UL-SRS resources that meet specific conditions.

[0151] As an example, the conditions for performing aggregated UL-SRS resources according to embodiments of this disclosure may be one or a combination of the following.

[0152] -UL SRS resources can reside in the same time slot and symbol in the time domain.

[0153] -UL-SRS resources can have the same periodicity and slot offset.

[0154] -UL-SRS resources can have the same silent mode.

[0155] -UL-SRS resources can have the same NR-UL-SRS-SFN0-Offset value.

[0156] -UL-SRS resources can be transmitted using the same antenna reference point (ARP) and the same RF chain within the same UE.

[0157] - UL-SRS resources can be sent using the same number of symbols.

[0158] -UL-SRS resources can have the same repeatability factor value.

[0159] -UL SRS resources can be transmitted using the same set of parameters (the same cyclic prefix or the same subcarrier spacing).

[0160] -UL-SRS resources can be sent using the same or different bandwidths.

[0161] -UL-SRS resources can have the same comb tooth size.

[0162] -UL-SRS resources can have the same subcarrier unit transmission power.

[0163] -UL SRS resources can have phase continuity guaranteed between aggregated carriers.

[0164] Figure 9 This is a flowchart illustrating a signaling process for UE location estimation using UL-SRS BW aggregation according to an embodiment of the present disclosure.

[0165] refer to Figure 9UE 9-01 can report UE capability information related to UL-SRS BW aggregation operations to serving gNB 9-02 and LMF 9-04. When LMF 9-04 determines that UL-PRS BW aggregation operations are required, LMF 9-04 can request serving gNB 9-02 to aggregate UL-SRS resources transmitted by UE 9-01, whose location needs to be estimated, in operation 9-15, and provide specific requirements related to it. Subsequently, serving gNB 9-02 can determine the aggregated UL-SRS resources to be allocated to UE 9-01 in operation 9-20, and provide UE 9-01 and LMF 9-04 with transmission configuration information 9-25 and 9-30 regarding the aggregated UL-SRS resources. Subsequently, LMF 9-04 can request serving gNB 9-02 (9-35) to activate the UE's aggregated UL-SRS transmission. In operation 9-40, the serving gNB 9-02 can instruct the UE to activate the aggregated UL-SRS transmission according to a request from the LMF, and then report the result to the LMF in operation 9-45. Subsequently, in operation 9-55, the LMF 9-04 can instruct the TRPs 9-02 and 9-03 to perform a joint measurement (or aggregate measurement) of the aggregated UL-SRS resources sent by the UE. In this case, the TRP can perform the joint measurement according to the instruction of the LMF 9-04 in operation 9-60, and then report the result value (e.g., the UL-SRS reception time point) to the LMF in operation 9-65. When the UE's location estimation process is complete, in operation 9-70, the LMF can request the serving gNB 9-02 to deactivate the UE's aggregated UL-SRS transmission. In operation 9-75, the serving gNB can instruct the UE to deactivate the aggregated UL-SRS transmission according to the request from the LMF. The detailed signaling procedures used for these operations can be described below.

[0166] Depending on the system configuration and / or definitions, not all may include Figure 9 The operations shown are provided, and some operations can be omitted.

[0167] In operation 9-05, LMF 9-04 can exchange NRPPa TRP configuration information with service gNB / TRP 9-02 and neighboring cell gNB / TRP 9-03 (NRPPa TRP Configuration Information Exchange).

[0168] LMF 9-04 can obtain the information required to perform the UL positioning method from serving gNB / TRP 9-02 and neighboring gNB / TRP 9-03. The information required to perform the UL positioning method may include at least one of NR cell information, PRS configuration, spatial orientation information, and location information.

[0169] In operation 9-09, UE 9-01 and serving gNB / TRP 9-02 can exchange UE capability information. At this time, UE 9-01 can provide serving gNB 9-02 with a combination of at least one of the following UE capability information related to UL-SRS BW aggregation operation for location estimation.

[0170] • Support for UL-SRS aggregation: A 1-bit indicator that suggests or indicates whether aggregated UL-SRS transmissions are possible for aggregated UL-SRS resources. Aggregated UL-SRS transmissions can refer to the operation of aggregating and transmitting different UL-SRS resources transmitted via different carriers (or serving cells). The indicator can be defined in the form nr-UL-SRS-AggregatedTransSupportENUMERAGED{supported}.

[0171] • Maximum number of carriers for aggregation: An indicator that specifies the maximum number of carriers available for UL-SRS BW aggregation. For example, the indicator may indicate the maximum number of carriers (or serving cells) from which aggregated UL-SRS transmissions are performed by the UE. The indicator may be defined in the form maxSupportedAggregatedCarriers INTEGER (2..3) and may be defined and configured on a per-UE, per-band, or per-aggregated-carriers basis.

[0172] • Maximum Aggregated Bandwidth: An indicator that specifies the maximum bandwidth available for UL-SRS BW aggregation operations. For example, the indicator may specify the maximum bandwidth a UE can use to perform aggregated UL-SRS transmissions. The indicator may be defined in the form of supportedBandwidthAggregationSRS ENUMERATED{mhz50,mhz100,mhz150,mhz200,mhz400,mhz800…} (where “mhz50” may mean 50MHz, “mhz100” may mean 100MHz, and the same applies to the following), and may be defined and configured in units of UE, frequency band, or aggregation carrier combination.

[0173] • Maximum number of SRS resources processed in a slot on aggregation: An indicator that specifies 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 maxNumOfAggregatedUL-SRS-ResProcessedPerSlot ENUMERATED{n1,n2,n4,n8,n16,n24,n32,n48,n64} (where “n1” indicates one resource, “n2” indicates two resources, and the same applies to the following), and can be defined and configured on a per-UE, per-band, or per-aggregated-carrier combination.

[0174] In Operation 9-10, LMF 9-04 can exchange UE capability information (LPP Capability Transfer) between LMF 9-04 and UE 9-01.

[0175] LMF 9-04 can request and receive UE capability information related to location estimation from UE 9-02. At this time, UE 9-01 can provide LMF 9-04 with a combination of at least one of the following UE capability information related to UL-SRS BW aggregation operation for location estimation.

[0176] • Support for UL-SRS aggregation: A 1-bit indicator that suggests or indicates whether aggregated UL-SRS transmissions are possible for aggregated UL-SRS resources. Aggregated UL-SRS transmissions can refer to the operation of aggregating and transmitting different UL-SRS resources transmitted via different carriers (or serving cells). The indicator can be defined in the form nr-UL-SRS-AggregatedTransSupportENUMERAGED{supported}.

[0177] • Maximum number of carriers for aggregation: An indicator that specifies the maximum number of carriers available for UL-SRS BW aggregation. For example, the indicator can indicate whether a UE can perform aggregated UL-SRS transmissions for aggregated UL-SRS transmitted from a maximum number of carriers (or serving cells). The indicator can be defined in the form maxSupportedAggregatedCarriers INTEGER (2..3) and can be defined and configured on a per-UE, per-band, or per-aggregated-carrier basis.

[0178] • Maximum Aggregated Bandwidth: An indicator that specifies the maximum bandwidth available for UL-SRS BW aggregation operations. For example, the indicator may specify the maximum bandwidth a UE can use to perform aggregated UL-SRS transmissions for aggregated UL-SRS. The indicator may be defined in a form such as supportedBandwidthAggregationSRS ENUMERATED{mhz50,mhz100,mhz150,mhz200,mhz400,mhz800…} (where “mhz50” may mean 50MHz, “mhz100” may mean 100MHz, and the same applies to the rest), and may be defined and configured in units of UE, frequency band, or aggregated carrier combination.

[0179] • Maximum number of SRS resources processed in a slot on aggregation: An indicator that specifies 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 maxNumOfAggregatedUL-SRS-ResProcessedPerSlot ENUMERATED{n1,n2,n4,n8,n16,n24,n32,n48,n64} (where “n1” indicates one resource, “n2” indicates two resources, and the same applies to the following), and can be defined and configured on a per-UE, per-band, or per-aggregated-carrier combination.

[0180] In operation 9-15, LMF 9-04 can send an NRPPa POSITIONING INFORMATION REQUEST message to service gNB / TRP 9-02.

[0181] The NRPPa location information request message sent by LMF 9-04 may include information requesting UE SRS transmission resources required for UL positioning from serving gNB / TRP 9-02, determined based on information collected by the LMF (e.g., location information of neighboring cell TRPs, existing UE location information, SSB / PRS transmission information of TRPs, etc.). This message may include information regarding at least one of the following: the quantity, periodicity, path loss reference, and spatial relationships of the required SRS resources. Additionally, when the LMF requests aggregated UL-SRS transmissions from UE 9-01 during UL-SRS transmissions used for location estimation, this message may include a combination of at least one of the following information.

[0182] - 1-bit indicator for requesting UL-SRS BW aggregation: A 1-bit indicator for requesting UL-SRS BW aggregation can be defined and configured.

[0183] - Aggregated UL-SRS BW: An indicator can be defined and configured to indicate the bandwidth of the requested aggregated UL-SRS. Alternatively, the configuration range of the bandwidth field, which is already configured in units of FR, can be extended to indicate a wider bandwidth than the existing bandwidth (FR1: 5mHz to 100mHz, FR2: 50mHz to 400MHz) exceeding 100mHz / 400MHz. The LMF can request 100MHz or 400MHz or greater UL-SRS BW for each FR by using the extended field to the service gNB 9-02, and the service gNB 9-02 can interpret this as an implicit request for UL-SRS BW aggregation.

[0184] - Number of carriers for UL-SRS BW aggregation: An indicator for requesting the number of carriers for UL-SRS BW aggregation can be defined and configured. For example, the indicator can indicate a value of 2 or 3.

[0185] - Carrier sets for BW UL-SRS aggregation: Indicators can be defined and configured for requesting combinations of carriers (or serving cells) to be used for BW UL-SRS aggregation. Indicators can indicate one or more carrier combinations in list form.

[0186] - Additional information for UL-SRS aggregation: When configuring the indicator (carrier set for UL-SRS BW aggregation), the UE may also include specific configuration information for each carrier combination (e.g., aggregation of UL-SRS BW, CombSizeN, periodicity, repetition factor, etc.).

[0187] In Operation 9-20, Service gNB / TRP 9-02 can finally determine the SRS resources used by the UE to send SRS (gNB determines UL SRS resources).

[0188] After receiving the NRPPa location information request message from LMF 9-04, the serving gNB / TRP 9-02 can finally determine the SRS resources to be configured for the UE based on the received message.

[0189] In Operation 9-25, Service gNB / TRP 9-02 can transmit the SRS resource configuration information (or SRS resource transport configuration information or UE SRS configuration) determined in Operation 9-20 to UE 9-01 (UE SRS configuration). At this time, the UE SRS configuration information can be included in the RRCReconfiguration message.

[0190] The serving gNB / TRP 9-02 can transmit SRS resource configuration information to UE 9-01 via RRC signaling. In this case, the serving gNB 9-02 can indicate to the UE that two or more (e.g., two or three) UL-SRS resource sets configured in different carriers (or serving cells) have been aggregated (or linked). More specifically, the SRS resource configuration information may include at least one combination of the following.

[0191] -One or more aggregated UL-SRS resource sets

[0192] - ID connected to each of the aggregated UL-SRS resource sets

[0193] - Each aggregated UL-SRS resource set combination includes two or more (e.g., two or three) aggregated UL-SRS resource sets (SRS-PosResourceSet).

[0194] - Indicates the information required for each aggregated UL-SRS resource set (Serving Cell ID / Index, BWP-ID, CellGroupInfo{MCG,SCG}, SRS-PosResourceSetId, etc.)

[0195] exist Figure 10 The method for including the above information elements in the RRCReconfiguration message is described in more detail in service gNB / TRP 9-02.

[0196] In operation 9-30, service gNB / TRP 9-02 can send an NRPPa POSITIONING INFORMATION RESPONSE message to LMF 9-04.

[0197] The NRPPa location information response message sent by serving gNB / TRP 9-02 can be used to transmit to the LMF the SRS resource configuration information (e.g., the location, periodicity, spatial relationship information, etc. of the SRS resources in the time / frequency axis) that was ultimately transmitted to UE 9-01 by serving gNB / TRP 9-02 in operation 9-25. Additionally, in operation 9-25, when serving gNB 9-02 indicates to UE 9-01 that two or more (e.g., two or three) UL-SRS resource sets configured in different carriers (or serving cells) have been aggregated (or linked), the corresponding information can be included in the NRPPa location information response message.

[0198] In operation 9-35, LMF 9-04 can send an NRPPa POSITIONING ACTIVATION REQUEST message to service gNB / TRP 9-02.

[0199] When UE 9-02 is configured to transmit semi-persistent SRS or aperiodic SRS, LMF 9-04 can use an NRPPa location activation request message to request activation of UE 9-01's SRS transmission from the serving gNB / TRP 9-02. Additionally, when the serving gNB 9-02 has indicated to UE 9-01 in operation 9-25 that two or more (e.g., two or three) UL-SRS resource sets configured in different carriers (or serving cells) have been aggregated (or linked), and the corresponding information has been provided to LMF 9-04 in operation 9-30, LMF 9-04 can include in the NRPPa location activation message information for requesting activation of some (e.g., one, two, or three) of the two or more UL-SRS resource sets included in the aggregated UL-SRS resource set.

[0200] In Operation 9-40, Service gNB / TRP 9-02 can configure the activation of SRS transmission to UE 9-01 (Activate UESRS transmission).

[0201] The serving gNB / TRP 9-02, receiving the NRPPa location activation request message, can indicate SRS activation to UE 9-40 via MAC CE or DCI. Additionally, when the serving gNB 9-02 has already indicated to UE 9-01 in Operation 9-25 that two or more (e.g., two or three) UL-SRS resource sets configured in different carriers (or serving cells) have been aggregated (or linked), it can indicate to the UE via a MAC CE that some (e.g., one, two, or three) of the transport activations included in the aggregated UL-SRS resource sets are also included. (See reference...) Figure 11 and Figures 12A to 12C A more detailed description of the MAC CE definition and its configuration methods.

[0202] In operation 9-45, service gNB / TRP 9-02 can send an NRPPA POSITIONING ACTIVATION RESPONSE message to UE 9-01.

[0203] The NRPPa location activation response message can be used by service gNB / TRP 9-02 to respond to the NRPPa location activation request message by sending information indicating whether SRS activation is complete (or SRS activation complete) to LMF 9-04.

[0204] In operation 9-55, LMF 9-04 can send an NRPPa measurement request message.

[0205] LMF 9-04 can use an NRPPa measurement request message to request measurements of SRS sent by the UE and report the results to serving gNB / TRP 9-02 and neighboring cell gNB / TRP 9-03. In this case, the NRPPa measurement request message can also include SRS resource information configured for UE 9-01. Additionally, when serving gNB 9-02 has indicated to UE 9-01 that two or more (e.g., two or three) UL-SRS resource sets configured in different carriers (or serving cells) in operation 9-25 have been aggregated (or linked), and the corresponding information has been provided to LMF 9-04 in operation 9-30, LMF 9-04 can include information in the NRPPa measurement request message to request aggregated (or joint) measurements of the aggregated UL-SRS resource sets. LMF can instruct the aggregated measurement operation to serving gNB / TRP 9-02 and neighboring cell gNB / TRP 9-03 via an NRPPa measurement request message using at least one of the following methods.

[0206] • Method 1 (1-bit indication requesting aggregated measurement): The LMF can perform aggregated measurement via a 1-bit indication instruction to service gNB / TRP9-02 and neighboring cell gNB / TRP9-03. When the LMF performs aggregated measurement via a 1-bit indication instruction to service gNB / TRP9-02 and neighboring cell gNB / TRP9-03, service gNB / TRP9-02 and neighboring cell gNB / TRP9-03 can perform aggregated measurement using some or all of the aggregated UL-PRS resource sets included in the UL-SRS configuration information included in the NRPPa measurement request message.

[0207] • Method 2 (Indicating the AggregationID for Aggregation Measurement): When the serving gNB 9-02 provides the UE with information about the aggregated UL-SRS resource set by assigning an aggregation ID to each specific aggregated UL-SRS-ResourceSet in Operation 9-25, the LMF can indicate the aggregation measurement to the serving gNB / TRP 9-02 and the neighboring cell gNB / TRP 9-03 by including the specific aggregation ID in the NRPPa measurement request message. When a specific aggregation ID value is configured in the NRPPa measurement request message received from the LMF, the serving gNB / TRP 9-02 and the neighboring cell gNB / TRP 9-03 can perform the aggregation measurement by using the aggregated UL-SRS resource set combination connected to the corresponding aggregation ID value.

[0208] • Method 3 (Indicating Which Carriers are Used for Aggregation Measurement): The LMF can indicate aggregation measurement to the serving gNB / TRP 9-02 and neighboring gNB / TRP 9-03 by configuring the carriers (or serving cells) used for aggregation measurement within the NRPPa measurement request message. When the carriers to be used for aggregation measurement are indicated in the NRPPa measurement request message received from the LMF, the serving gNB / TRP 9-02 and neighboring gNB / TRP 9-03 can perform aggregation measurement by using an appropriate combination of UL-SRS resource sets aggregated in the indicated carriers from the aggregated UL-SRS resource set included in the received UL-SRS configuration information (e.g., a combination of aggregated UL-SRS resource sets with good signal strength). For reference, Method 3, which only indicates the carriers, can provide greater flexibility for the serving gNB / TRP 9-02 and neighboring gNB / TRP 9-03 in determining which combination of aggregated UL-SRS resource sets is used for aggregation measurement, compared to Method 2, which explicitly indicates the combination of UL-SRS resource sets used to perform aggregation measurement.

[0209] In Operation 9-60, the serving gNB / TRP 9-02 and the neighboring cell gNB / TRP 9-03 can measure the SRS (UL SRS measurement) sent by the UE 9-01.

[0210] The serving gNB / TRP 9-02 and neighboring cell gNB / TRP 9-03, which receive a request for SRS measurement from LMF 9-04 via an NRPPa measurement request message, can measure the SRS sent by UE9-01 based on the SRS configuration information included in the NRPPa measurement request message. Additionally, when aggregated or joint measurement is indicated in Operation 9-55, the serving gNB / TRP 9-02 and neighboring cell gNB / TRP 9-03 can perform aggregated or joint measurement according to the indication from LMF 9-04.

[0211] In Operation 9-65, the serving gNB / TRP 9-02 and the neighboring gNB / TRP 9-03 can send an NRPPa measurement response message to LMF 9-04.

[0212] The NRPPa measurement response message can be used to send the results of the SRS measurement requested by service gNB / TRP 9-02 and neighboring cell gNB / TRP 9-03 from LMF 9-04 in operation 9-55 to LMF 9-04. Additionally, when service gNB / TRP 9-02 and neighboring cell gNB / TRP 9-03 perform aggregated measurements in operation 9-60 according to the instructions of LMF 9-04 in step 9-55, service gNB / TRP 9-02 and neighboring cell gNB / TRP 9-03 can report the aggregated measurement results via the NRPPa measurement response message in operation 9-65. In this case, to notify the LMF that the measurement results included in the NRPPa measurement response message are obtained through aggregated measurements, at least one of the following two methods can be used.

[0213] • Method 1 (using a 1-bit indicator): Service gNB / TRP 9-02 and neighboring cell gNB / TRP 9-03 can notify the LMF by using a 1-bit indicator that the measurement result value included in the NRPPa measurement response message is the result value obtained through aggregated measurement.

[0214] • Method 2 (Existing Field Extension): Service gNB / TRP 9-02 and neighboring cell gNB / TRP 9-03 can notify LMF that the corresponding measurement result value is an aggregated measurement result by extending existing fields used to report UL-SRS measurement result values ​​(e.g., UL RTOA or gNB Rx-Tx time difference field in TRP measurement result IE).

[0215] In operation 9-70, LMF 9-04 can send the NRPPa POSITIONING DEACTIVATION message to service gNB / TRP 9-02.

[0216] The NRPPa location deactivation message can be sent by LMF 9-04 to service gNB / TRP 9-02 to deactivate the SRS transmission requested in operation 9-35 after LMF 6-04 has completed the location estimation technique operation.

[0217] In this scenario, the NRPPa location deactivation message may include the ID of the UL-SRS resource set to be deactivated. Additionally, when in Operation 9-25 the serving gNB 9-02 has indicated to the UE 9-01 that two or more (e.g., two or three) UL-SRS resource sets configured in different carriers (or serving cells) have been aggregated (or linked), and in Operation 9-30 the corresponding information has been provided to the LMF 9-04, the LMF 9-04 may include in the NRPPa location deactivation message information requesting the deactivation of some (e.g., one, two, or three) of the two or more UL-SRS resource sets included in the aggregated UL-SRS resource set.

[0218] In Operation 9-75, Service gNB / TRP 9-02 can configure deactivated SRS transmission to UE 9-01 (deactivate UE SRS transmission).

[0219] In Operation 9-75, the serving gNB / TRP 9-02, which receives the NRPPa location deactivation request message, can instruct the UE 9-40 to deactivate the SRS via MAC CE. Additionally, when the serving gNB 9-02 has already instructed the UE 9-01 that two or more (e.g., two or three) UL-SRS resource sets configured in different carriers (or serving cells) in Operation 9-25 have been aggregated (or linked), a MAC CE can instruct the UE to deactivate some (e.g., one, two, or three) of the transports included in the aggregated UL-SRS resource sets. Figure 11 and Figures 12A to 12C The document details the MAC CE definition and configuration methods used for this purpose.

[0220] Figure 10 This is a diagram illustrating the UL-SRS (Location SRS) configuration information elements included in RRCReconfiguration messages 9-25 according to an embodiment of this disclosure.

[0221] RRCReconfiguration message 10-01 may include cell group configuration information 10-10 for the primary cell group (MCG) and cell group configuration information 10-20 for the secondary cell group (SCG). The configuration information (CellGroupConfig IE) 10-10 or 10-20 for each cell group may include configuration information 10-12 for one or more carriers (or cells), and each cell may be connected to a specific ID (e.g., ServCellIndex). The configuration information for each cell may also include configuration information 10-13 for one or more bandwidth portions (BWPs). Additionally, the configuration information for each BWP may include the ID of each BWP (BWP-Id), and one or more UL-SRS resource set settings (10-14, 10-17, SRS-PosResourceSet) and one or more UL-SRS resource configuration settings (SRS-PosResource). An SRS-PosResourceSet can be listed as a list containing the ID of each SRS-PosResourceSet (srs-PosResourceSetId) and the IDs of one or more UL-SRS resources belonging to the corresponding UL-SRS resource set (10-15, SRS-PosResourceId), as well as information elements configured on a resource set basis (e.g., resource type, periodicity, α, P0, pathlossReferenceRS-PO).

[0222] For UL-SRS (Location SRS) BW aggregation operations, the serving gNB 9-02 can indicate to the UE 9-01 that specific UL-SRS resources 10-17 and 10-18 configured in different carriers (cells) within multiple UL-SRS resource sets (SRS-PosResourceSets) included in the RRCReconfiguration message have been aggregated. To this end, the serving gNB 9-02 can indicate whether aggregation is performed on a per-UL-SRS resource set (SRS-PosResourceSet) basis. For example, the aggregated UL-SRS resource set combination may include 2 to 3 UL-SRS resource sets transmitted in different carriers (or cells) (e.g., UL-SRS resource set 10-17 (set M) transmitted in one of the other SCells and UL-SRS resource set 10-18 (set 1) transmitted in one of the other SCells). As described above, service gNB 9-02 may use at least one or a combination of the following methods to indicate the aggregated UL-SRS resource set included in the UL-SRS resource set (SRS-PosResourceSet) in the RRCReconfiguration message.

[0223] Method 1-1 (including UL-SRS aggregation information at the RRCReconfiguration message level, without using the aggregation ID): Define a new field at the RRCReconfiguration message level to indicate an aggregated UL-SRS resource set (e.g., SRS-PosResourceSetLinkedForAggBWInfo), and the corresponding field can indicate one or more aggregated UL-SRS resource set combinations, as shown in [Table 7] below.

[0224] [Table 7]

[0225]

[0226] Referring to [Table 7], SRS-PosResourceSetLinkedForAggBWInfo can be a list of one or more aggregated UL-SRS resource sets (SRS-PosResourceSetLinkedForAggBWList) that include up to MaxNrOfPosSRSAggregation.

[0227] In addition, each SRS-PosResourceSetLinkedForAggBWList can be a list that includes two or more (e.g., at least two and at most three) SRS-PosResourceSetLinkedForAggBW IEs indicating the aggregation of UL-SRS resource sets.

[0228] The SRS-PosResourceSetLinkedForAggBW IE can include at least one or a combination of the following fields to indicate each of the aggregated UL-SRS resource sets.

[0229] -srs-PosResourceSetLinked: This field indicates the ID value (SRS-PosResourceSetId) of each item in the aggregated UL-SRS resource set.

[0230] -servingCellAndBWP: This can assign a unique value to each BWP, representing the ID of the UL-SRS resource set indicated by srs-PosResourceSetLinked. Therefore, servingCellAndBWP can indicate a servingCellAndBWP-ID IE, which includes the ID of the serving cell in the UL-SRS resource set configured in RRCReconfiguration and the ID of the BWP configured for the corresponding UL-SRS resource set. Alternatively, the serving cell ID and the BWP ID can be included as separate IEs.

[0231] -cellGroupInfo: A unique value can be assigned to the serving cell ID indicated by servingCellAndBWP in each cell group (MCG or SCG). Therefore, the cell group in which the corresponding UL-SRS resource set is configured can be indicated in the UL-SRS resource set configured in RRCReconfiguration. For this purpose, the cellGroupInfo field can be defined as ENUMERATED{MCG,SCG} to indicate either MCG or SCG (Option 1), or it can be defined as ENUMERATED{SCG} so that it can be optionally included only when indicating SCG (Option 2).

[0232] - Carrier: The frequency configured for the corresponding UL-SRS resource set can be indicated by the Absolute Radio Frequency Channel Number (AFRCN).

[0233] Method 1-2 (including UL-SRS aggregation information at the RRCReconfiguration message level, using aggregation ID): Define a new field at the RRCReconfiguration message level to indicate an aggregated UL-SRS resource set (e.g., SRS-PosResourceSetLinkedForAggBWInfo), and the corresponding field can indicate one or more aggregated UL-SRS resource set combinations (SRS-PosResourceSetAggregation), as shown in [Table 8] below.

[0234] [Table 8]

[0235]

[0236] Referring to [Table 8], SRS-PosResourceSetLinkedForAggBWInfo can be a list of one or more aggregated UL-SRS resource set combinations (SRS-PosResourceSetAggregation) that include up to MaxNrOfPosSRSAggregation.

[0237] In addition, each SRS-PosResourceSetAggregation IE may include a field (srs-PosResourceSetAggID) indicating the ID value linked to the corresponding aggregated UL-SRS resource set combination; and a list (SRS-PosResourceSetLinkedForAggBWList) including two or more (e.g., a minimum of two and a maximum of three) aggregated UL-SRS resource sets.

[0238] Unlike Method 1-1, when the aggregate ID (srs-PosResourceSetAggID) is assigned or connected to a specific aggregated UL-SRS resource set combination as in Method 1-2, the signaling load can be significantly reduced when the serving gNB 9-02 indicates to the UE 9-01 via MAC CE the transmission activation or deactivation of the UL-SRS resource sets included in the specific aggregated UL-SRS resource set combination. More specifically, instead of including multiple combinations of {serving cell ID, BWP ID, resource set ID} associated with each UL-SRS resource set, only one aggregate ID (srs-PosResourceSetAggID) can be included to indicate one or more aggregated UL-SRS resource sets to be activated and deactivated in the MAC CE. The following will explain... Figure 11 and Figures 12A to 12C The text describes a detailed description related to it.

[0239] The 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.

[0240] -srs-PosResourceSetLinked: This field indicates the ID value (SRS-PosResourceSetId) of each item in the aggregated UL-SRS resource set.

[0241] -servingCellAndBWP: This can assign a unique value to each BWP, representing the ID of the UL-SRS resource set indicated by srs-PosResourceSetLinked. Therefore, servingCellAndBWP can indicate a servingCellAndBWP-ID IE, which includes the ID of the serving cell in the UL-SRS resource set configured in RRCReconfiguration and the ID of the BWP configured for the corresponding UL-SRS resource set. Alternatively, the serving cell ID and the BWP ID can be included as separate IEs.

[0242] - cellGroupInfo: A unique value can be assigned to the serving cell ID indicated by servingCellAndBWP in each cell group (MCG or SCG). Therefore, the cell group configured for the corresponding UL-SRS resource set can be indicated in the UL-SRS resource set configured in RRCReconfiguration. For this purpose, the cellGroupInfo field can be defined as ENUMERATED{MCG,SCG} to indicate either MCG or SCG (Option 1), or it can be defined as ENUMERATED{SCG} to be optionally included only when indicating SCG (Option 2). - Carrier: The frequency configured for the corresponding UL-SRS resource set can be indicated by the Absolute Radio Frequency Channel Number (AFRCN).

[0243] Method 2-1 (including UL-SRS aggregation information at the RRCReconfiguration message level, without using the aggregation ID): Define a new field at the CellgroupConfiguration IE level to indicate an aggregated UL-SRS resource set (e.g., SRS-PosResourceSetLinkedForAggBWInfo), and the corresponding field can indicate one or more aggregated UL-SRS resource set combinations, as shown in [Table 9] below.

[0244] [Table 9]

[0245]

[0246] Referring to [Table 9], SRS-PosResourceSetLinkedForAggBWInfo can be a list of one or more aggregated UL-SRS resource sets (SRS-PosResourceSetLinkedForAggBWList) that include up to MaxNrOfPosSRSAggregation.

[0247] In addition, each SRS-PosResourceSetLinkedForAggBWList can be a list that includes two or more (e.g., at least two and at most three) SRS-PosResourceSetLinkedForAggBWIEs indicating the aggregation of UL-SRS resource sets.

[0248] The SRS-PosResourceSetLinkedForAggBW IE can include at least one or a combination of the following fields to indicate each of the aggregated UL-SRS resource sets.

[0249] -srs-PosResourceSetLinked: This field indicates the ID value (SRS-PosResourceSetId) of each item in the aggregated UL-SRS resource set.

[0250] - `servingCellAndBWP`: A unique value can be assigned to each BWP, representing the ID of the UL-SRS resource set indicated by `srs-PosResourceSetLinked`. Therefore, `servingCellAndBWP` can indicate the `servingCellAndBWP-ID` IE, which includes the ID of the serving cell in the UL-SRS resource set configured in `RRCReconfiguration` and the ID of the BWP configured for the corresponding UL-SRS resource set. Alternatively, the ID of the serving cell and the ID of the BWP can be included as separate IEs. - `Carrier`: The frequency configured for the corresponding UL-SRS resource set can be indicated by the Absolute Radio Frequency Channel Number (AFRCN).

[0251] Method 2-2 (including UL-SRS aggregation information at the CellgroupConfiguration level, using the aggregation ID): Define a new field at the CellgroupConfiguration IE level to indicate an aggregated UL-SRS resource set (e.g., SRS-PosResourceSetLinkedForAggBWInfo), and the corresponding field can indicate one or more aggregated UL-SRS resource set combinations (SRS-PosResourceSetAggregation), as shown in [Table 10] below.

[0252] [Table 10]

[0253]

[0254] Referring to [Table 10], SRS-PosResourceSetLinkedForAggBWInfo can be a list of one or more aggregated UL-SRS resource set combinations (SRS-PosResourceSetAggregation) that can include up to MaxNrOfPosSRSAggregation.

[0255] In addition, each SRS-PosResourceSetAggregation IE may include a field (srs-PosResourceSetAggID) indicating the ID value linked to the corresponding aggregated UL-SRS resource set combination; and a list (SRS-PosResourceSetLinkedForAggBWList) including two or more (e.g., a minimum of two and a maximum of three) aggregated UL-SRS resource sets.

[0256] Unlike Method 2-1, when the aggregate ID (srs-PosResourceSetAggID) is assigned or connected to a specific aggregated UL-SRS resource set combination as in Method 2-2, the signaling load can be significantly reduced when the serving gNB 9-02 indicates to the UE 9-01 via MAC CE the transmission activation or deactivation of the UL-SRS resource sets included in the specific aggregated UL-SRS resource set combination. More specifically, instead of including multiple combinations of {serving cell ID, BWP ID, resource set ID} associated with each UL-SRS resource set, only one aggregate ID (srs-PosResourceSetAggID) can be included to indicate one or more aggregated UL-SRS resource sets to be activated and deactivated in the MAC CE. The following will explain... Figure 11 and Figures 12A to 12C The text describes a detailed description related to it.

[0257] The 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.

[0258] -srs-PosResourceSetLinked: This field indicates the ID value (SRS-PosResourceSetId) of each item in the aggregated UL-SRS resource set.

[0259] -servingCellAndBWP: This can assign a unique value to each BWP, representing the ID of the UL-SRS resource set indicated by srs-PosResourceSetLinked. Therefore, servingCellAndBWP can indicate a servingCellAndBWP-ID IE, which includes the ID of the serving cell in the UL-SRS resource set configured in RRCReconfiguration and the ID of the BWP configured for the corresponding UL-SRS resource set. Alternatively, the serving cell ID and the BWP ID can be included as separate IEs.

[0260] - Carrier: The frequency configured for the corresponding UL-SRS resource set can be indicated by the Absolute Radio Frequency Channel Number (AFRCN).

[0261] As in Methods 1-1 and 1-2, when UL-SRS aggregation information at the RRCReconfiguration message level is included, aggregation between SRS-PosResourceSets configured in different cell groups (MCG or SCG) can be supported. On the other hand, as in Methods 2-1 and 2-2, when UL-SRS aggregation information at the cellgroupConfiguration level is included, the field (cellGroupInfo) indicating the cell group in which a specific SRS-PosResourceSet is configured can be omitted, thereby reducing signaling overhead.

[0262] Method 3 (including UL-SRS aggregation information at the SRS-PosResourceSet level, using the aggregation ID):

[0263] To indicate the ID value of the aggregated UL-SRS resource set combination that includes the corresponding UL-SRS resource set at the SRS-PosResourceSet IE level, a new field can be defined as shown in [Table 11] below (e.g., srs-PosResourceSetAggID).

[0264] [Table 11]

[0265]

[0266] Referring to [Table 11], the srs-PosResourceSetAggID field can be used to indicate an aggregated UL-SRS resource set combination that includes a specific UL-SRS resource set (SRS-PosResourceSet). For example, SRS-PosResourceSet M 10-17 and SRS-PosResourceSet 1 10-18 can be aggregated by configuring the same ID value in the srs-PosResourceSetAggID field in the SRS-PosResourceSet IE corresponding to the two sets 10-17 and 10-18.

[0267] In the embodiment of [Table 11], it is assumed that a UL-SRS resource set (SRS-PosResourceSet) is included in only one aggregate combination, and therefore the srs-PosResourceSetAggID field already indicates an ID value. If a UL-SRS resource set (SRS-PosResourceSet) is included in multiple aggregate combinations, the srs-PosResourceSetAggID field can indicate a list of multiple ID values.

[0268] Figure 11 This is a diagram illustrating the configuration of an aggregated UL-SRS resource set according to an embodiment of the present disclosure.

[0269] refer to Figure 11 It can aggregate multiple UL-SRS resource sets 11-10, 11-20, and 11-30 sent from different serving cells, and this can be explicitly configured through the RRCReconfiguration message 9-25 sent from serving gNB 9-02 to UE 9-01, such as... Figure 9 and Figure 10 As described above. In this case, aggregated UL-SRS resource sets 11-10, 11-20, and 11-30 can be connected to individual ID values ​​via RRCReconfiguration messages, such as... Figure 10 As described in [the text].

[0270] UL-SRS resource sets 11-10, 11-20, and 11-30, included in the aggregated UL-SRS resource set combination, may include multiple UL-SRS resources. In this case, the UE may implicitly determine that the corresponding UL-SRS resource has been aggregated when the UL-SRS resources included in the aggregated UL-SRS resource sets 11-10, 11-20, and 11-30, explicitly configured via the RRCReconfiguration message, meet at least one of the following conditions.

[0271] - The same periodicityAndOffset and slotOffset are configured.

[0272] - Ensure that path losses RS, Po, and α are configured for the same Tx PSD (per subcarrier power) (with the same Po and α configured).

[0273] Based on this condition, one or more aggregated UL-SRS resource combinations among the UL-SRS resources included in aggregated UL-SRS resource sets 11-10, 11-20, and 11-30 can be implicitly configured. The drawing example shows, as an example, the presence of two aggregated UL-SRS resource combinations, 11-01 and 11-02.

[0274] The serving gNB can explicitly configure aggregated UL-SRS resource sets (11-10, 11-20, 11-30) through the RRCReconfiguration message as described above, and the UE can implicitly identify one or more aggregated UL-SRS resource sets (11-01, 11-02) among the UL-SRS resources included in the aggregated UL-SRS resource sets.

[0275] When the type of the UL-SRS resource set included in the aggregated UL-SRS resource set combination is semi-persistent, the serving gNB 9-02 can send a MAC CE to the UE 9-01, such as Figure 9 Operations 9-40 and 9-75 are shown in the diagram to indicate the activation or deactivation of transmissions of some (e.g., one, two, or three) UL-SRS resource sets included in the aggregated UL-SRS resource set combination.

[0276] Additionally, when MAC CE is used to activate aggregated UL-SRS resource sets 11-10, 11-20, and 11-30, spatial information (information indicating beam direction in UL-SRS transmission) can be associated with each of the aggregated UL-SRS resource combinations 11-01 and 11-02 included in the respective aggregated SRS resource sets, as indicated by reference numerals 11-05 and 11-07, respectively. The following will... Figures 12A to 12C The structure of the MAC CE for this purpose is described in the document.

[0277] Figures 12A to 12C This is a diagram illustrating various structures of a MAC CE for activating or deactivating an aggregated UL-SRS resource set according to embodiments of the present disclosure.

[0278] Option 1 12-40 (The aggregate ID is used to indicate the combination of aggregated UL-SRS resource sets to be activated / deactivated)

[0279] like Figure 10As described in methods 1-2, 2-2, and 3, when each aggregated UL-SRS resource set combination is connected to a specific aggregate ID via an RRCReconfiguration message, a location SRS aggregate ID 12-41 can be included in the MAC CE to indicate the combination to be activated or deactivated in the aggregated UL-SRS resource set combination explicitly configured via the RRCReconfiguration message. A MAC CE with the structure of option 1 12-40 may include at least one of the following fields.

[0280] *Locating SRS Aggregate ID 12-41: Indicates the aggregated UL-SRS resource set combination to be activated or deactivated within the aggregated UL-SRS resource set combination explicitly configured via the RRCReconfiguration message. In this case, the Locating SRS Aggregate ID can be an ID value associated with each aggregated UL-SRS resource set combination, such as in... Figure 10 As in methods 1-2, 2-2, and 3. Additionally, when configuring only one aggregated UL-SRS resource set combination via the RRCReconfiguration message, it is not necessary to separately indicate which combination to activate or deactivate; therefore, the location SRS aggregate ID can be omitted.

[0281] *SET_i: The MAC CE may include a 1-bit indicator (e.g., SET_0, SET_1, and SET_2) corresponding to each UL-SRS resource set included in the aggregated UL-SRS resource set combination indicated by the location SRS aggregation ID, to indicate the activation or deactivation of each UL-SRS resource set. When the value of SET_i is set to 1 upon receiving the MAC CE, the UE may activate transmission for its corresponding UL-SRS resource set. When the value of SET_i is set to 0 upon receiving the MAC CE, the UE may deactivate transmission for its corresponding UL-SRS resource set. In this case, one of the following two methods can be used to determine the UL-SRS resource set corresponding to set i among the UL-SRS resource sets included in the aggregated UL-SRS resource set combination.

[0282] -Method A (see Method A) Figure 10 Methods 1-2 and 2-2): Set i can indicate the SRS-PosResourceSet configured in the i-th entry of SRS-PosResourceSetLinkedForAggBWList corresponding to the indicated aggregated UL-SRS resource set combination.

[0283] -Method B ( Figure 10Methods 1-2, 2-2 and 3): When the SRS-PosResourceSets included in the aggregated UL-SRS resource set combination are sorted in ascending order according to the ServCellIndex (the index value of the serving cell configured for each set) corresponding to each set, set i can indicate the i-th PosResourceSet.

[0284] *S: A 1-bit indicator used to specify whether beaming information is additionally included in the MAC CE. When the MAC CE is used to activate some UL-SRS resource sets included in the aggregated UL-SRS resource set combination, it may optionally include beaming information (spatial relationship) for transmitting the aggregated UL-SRS resources. For example, when S is set to 1, this indicates that spatial relationship information is included in the corresponding MAC CE, and when S is set to 0, this indicates that spatial relationship 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, beaming information (spatial relationship) for transmitting the aggregated UL-SRS resources may not be included, and S may be set to 0.

[0285] * Spatial Relationship of (Aggregated) Resource_k: Beam information (spatial relationship) used to transmit aggregated UL-SRS resources. When the MAC CE is used to activate some UL-SRS resource sets included in the aggregated UL-SRS resource set combination and the S field is set to 1, the corresponding field can indicate the beam information (spatial relationship) used to transmit aggregated UL-SRS resources. When the aggregated UL-SRS resource set to be activated is indicated by locating the SRS aggregation ID and SET_i, the spatial relationship field can indicate the UL-SRS resources included in the corresponding set that meet the requirements. Figure 11 The conditions described herein implicitly identify the spatial relationship information for each aggregated UL-SRS resource portfolio. In this case, one of the following two methods can be used as a means of indicating the spatial relationship information for each aggregated UL-SRS resource portfolio.

[0286] - Method A: Indicates the method used to aggregate the spatial relationship information of SRS-PosResource k. The aggregated SRS-POSResource k can indicate the k-th SRS-POSResourcek when the aggregated SRS-POSResourcek is sorted in ascending order of srs-PosResourceId among the SRS-POSResourcek included in the SRS-POSResourceSet corresponding to SET_0 (or the set with the smallest index in SET_i set to 1). The spatial relationship information indicated for the aggregated SRS-PosResource k can be the spatial relationship information of the aggregated resource combination including SRS-PosResource k.

[0287] - Method B: A method for indicating the spatial relationship information of SRS-PosResource k. When the SRS-PosResources included in the SRS-PosResourceSet corresponding to SET_0 (or the set with the smallest index and a value of 1 in SET_i) are sorted in ascending order of srs-PosResourceId, SRS-PosResource k can indicate the k-th SRS-PosResource. The spatial relationship information indicated by SRS-PosResource k can be the spatial relationship information of the aggregated resource combination including the corresponding SRS-PosResource k.

[0288] Option 2 12-50 (The aggregate ID is not used to indicate the aggregate UL-SRS resource set combination to be activated / deactivated)

[0289] To indicate which combination to activate or deactivate within an aggregated UL-SRS resource set combination explicitly configured via the RRCReconfiguration message, the MAC CE can indicate one of the UL-SRS resource sets included in the corresponding combination. A MAC CE with the structure of option 2 12-50 can include at least one of the following fields.

[0290] *The cell ID, BWP ID, and SRS resource set ID of the MAC CE can indicate a UL-SRS resource set belonging to the corresponding combination, thus indicating the target combination for activation or deactivation within the aggregated UL-SRS resource set combination explicitly configured via the RRCReconfiguration message. In this case, to indicate the UL-SRS resource set, the serving cell ID / index of the configured SRS-PosResourceSet, the BWP ID of the configured SRS-PosResourceSet, and the SRS-PosResourceSet ID (SRS-PosResourceSetId) can be included in the MAC CE.

[0291] *SET_i: The MAC CE may include a 1-bit indicator (e.g., SET_0, SET_1, and SET_2) corresponding to each UL-SRS resource set included in the indicated aggregated UL-SRS resource set combination, to indicate the activation or deactivation of each UL-SRS resource set. When the value of SET_i is set to 1 upon receiving the MAC CE, the UE may activate the transmission of the corresponding UL-SRS resource set. When the value of SET_i is set to 0 upon receiving the MAC CE, the UE may deactivate the transmission of the corresponding UL-SRS resource set. In this case, one of the following two methods can be used to determine the UL-SRS resource set corresponding to set i among the UL-SRS resource sets included in the aggregated UL-SRS resource set combination.

[0292] -Method A (see Method A) Figure 10 (Methods 1-1 and 2-2): Set i can indicate the SRS-PosResourceSet configured in the i-th entry of the SRS-PosResourceSetLinkedForAggBWList corresponding to the indicated aggregated UL-SRS resource set combination.

[0293] -Method B (see Method B) Figure 10 Methods 1-1 and 2-1 in the above): Set i can indicate the i-th PosResourceSet when the SRS-PosResourceSet included in the indicated aggregated UL-SRS resource set combination is sorted in ascending order with the ServCellIndex corresponding to each set (where each set is configured with the index value of the serving cell).

[0294] *S: A 1-bit indicator that beam information is included in the MAC CE. When the MAC CE is used to activate some UL-SRS resource sets included in the aggregated UL-SRS resource set combination, it may optionally include beam information (spatial relationship) for transmitting the aggregated UL-SRS resources. For example, when S is set to 1, this indicates that spatial relationship information is included in the corresponding MAC CE, and when S is set to 0, this indicates that spatial relationship 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 relationship) for transmitting the aggregated UL-SRS resources may not be included, and S may be set to 0.

[0295] *C: This field indicates whether the octet including the serving cell ID and BWP ID is included in the spatial relation of Resource_k below. This field can be set to a value of 0 or 1 when the MAC CE is used to activate some of the UL-SRS resources included in the aggregated UL-SRS resource set combination. For example, when the field value is 1, the octet including the serving cell ID and BWP ID can be included in the spatial relation of Resource_k. When the field value is 0, the octet including the serving cell ID and BWP ID may not be included in the spatial relation of Resource_k. In this case, the serving cell ID and BWP ID corresponding to the downlink (DL) reference signal included in the spatial relation of Resource_k can be the same as the cell ID and BWP ID of the location SRS resource set, respectively. When the MAC CE is used to deactivate the UL-SRS resource sets included in the aggregated UL-SRS resource set combination, the field value can be set to 0.

[0296] * Spatial Relationship of (Aggregated) Resource_k: Beam information (spatial relationship) used to transmit aggregated UL-SRS resources. When the MAC CE is used to activate some UL-SRS resource sets included in the aggregated UL-SRS resource set combination and the S field is set to 1, the corresponding field can indicate the beam information (spatial relationship) used to transmit aggregated UL-SRS resources. When the aggregated UL-SRS resource set to be activated is indicated by locating the SRS aggregation ID and SET_i, the spatial relationship field can indicate the UL-SRS resources included in the corresponding set that meet the requirements. Figure 11 The conditions described herein implicitly identify the spatial relationship information for each aggregated UL-SRS resource portfolio. In this case, one of the following two methods can be used as a means of indicating the spatial relationship information for each aggregated UL-SRS resource portfolio.

[0297] - Method A: A method for indicating the spatial relationship information of aggregated SRS-POSResourcek. Aggregated SRS-POSResourcek can indicate the k-th SRS-POSResourcek among the SRS-POSResourcek included in the SRS-PosResourceSet corresponding to SET_0 (or the SET (set) with the smallest index in SET_i set to 1, or the set indicated by the cell ID of the SRS resource set, the BWP ID of the SRS resource set, or the ID of the SRS resource set). The spatial relationship information indicated for aggregated SRS-POSResourcek can be the spatial relationship information of the aggregated resource combination including SRS-PosResourcek.

[0298] - Method B: A method for indicating the spatial relationship information of SRS-PosResource k. SRS-PosResource k can indicate the k-th SRS-PosResource among the SRS-PosResources included in the SRS-PosResourceSet corresponding to SET_0 (or SET_i set to 1, or the set indicated by the cell ID of the SRS resource set, the BWP ID of the SRS resource set, or the SRS resource set ID), when the SRS-PosResources are sorted in ascending order by srs-PosResourceId. The spatial relationship information indicated by SRS-PosResource k can be the spatial relationship information of the aggregated resource combination including the corresponding SRS-PosResource k.

[0299] Option 3 12-60 (The aggregate ID is not used to indicate the aggregate UL-SRS resource set combination to be activated / deactivated)

[0300] To indicate which combination to activate or deactivate within an aggregated UL-SRS resource set combination explicitly configured via the RRCReconfiguration message, the MAC CE can indicate one or more target SRS-PosResourceSets to activate or deactivate within the corresponding UL-SRS resource set. A MAC CE with the structure of option 3 12-60 may include at least one of the following fields.

[0301] *A / D: A 1-bit indicator that the MAC CE is used to activate or deactivate the transmission of the aggregated UL-SRS resource set. For example, when the A / D value is set to 1, it can indicate activation, and when the A / D value is set to 0, it can indicate deactivation.

[0302] * Locating the cell ID_i of the SRS resource set, locating the BWP ID_i of the SRS resource set, locating the SRS resource set ID_i: The MAC CE can indicate one or more UL-SRS resource sets i to be activated or deactivated in the aggregated UL-SRS resource sets, which have been explicitly configured via RRCReconfiguration messages. In this case, to indicate each UL-SRS resource set i, the ID / index of the serving cell configured for set i, the ID of the BWP configured for SRS-PosResourceSet, and the ID of the SRS-PosResourceSet (SRS-PosResourceSetId) can be included in the MAC CE. The MAC CE can indicate one or more (e.g., from a minimum of 1 to a maximum of 3) UL-SRS resource sets i as targets to be activated or deactivated. Therefore, the MAC CE can include one or more (e.g., from a minimum of one to a maximum of three) IDs (serving cell ID / index, BWP ID, and SRS-PosResourceSetId) from a combination of information used to indicate a particular UL-SRS resource set.

[0303] *S_i: When the MAC CE is used to activate some UL-SRS resource sets included in the aggregated UL-SRS resource set combination, beam information (spatial relationship) for transmitting the aggregated UL-SRS resources may optionally be included. In this case, to indicate which UL-SRS resource set (SRS-PosResourceSet) to reference for configuring (aggregating) the spatial relationship of Resource_k, a 1-bit indicator S_i corresponding to each UL-SRS resource set i may be included in the MAC CE. As described above, for each UL-SRS resource set i indicated by the cell ID_i of the SRS resource set location, the BWP ID_i of the SRS resource set location, and the ID_i of the SRS resource set location, a corresponding S_i value may be included. When only one of the multiple S_i values ​​is set to 1 and a particular S_i value is 1, it can indicate that the spatial relationship of Resource_k is configured (aggregated) based on the UL-SRS resource set i corresponding to the corresponding S_i. If multiple S_i values ​​are allowed to be set to 1 and multiple S_i values ​​are set to 1, it can mean that spatial relationship information is indicated for each UL-SRS resource set i corresponding to each S_i.

[0304] * Spatial Relationship of (Aggregated) Resource_k: When the MAC CE is used to activate some UL-SRS resource sets included in the aggregated UL-SRS resource set combination, it can include beam information (spatial relationship) for transmitting aggregated UL-SRS resources. When the aggregated UL-SRS resource set to be activated is indicated by the cell ID_i of the SRS resource set, the BWP ID_i of the SRS resource set, and the ID_i of the SRS resource set, the spatial relationship field can indicate the UL-SRS resources included in the corresponding set that meet the following conditions. Figure 11 The spatial relationship information for each aggregated UL-SRS resource portfolio is implicitly identified by the conditions described herein. In this case, one of the following two methods can be used as a means of indicating the spatial relationship information for each aggregated UL-SRS resource portfolio.

[0305] Method A: Indicates a method for aggregating spatial relationship information for SRS-PosResource k. Aggregating SRS-POSResourcek can indicate the k-th SRS-POSResourcek in the SRS-PosResourceSet corresponding to the UL-SRS resource set i (or the first UL-SRS resource set 0 indicated in the MAC CE, or the UL-SRS resource set i with the lowest serving cell index) when the aggregated SRS-POSResourcek is sorted in ascending order by srs-PosResourceId. The spatial relationship information indicated for aggregated SRS-PosResource k can be spatial relationship information including the aggregated resource combination of SRS-PosResource k.

[0306] Method B: A method for indicating the spatial relationship information of SRS-PosResource k. SRS-PosResource k can indicate the k-th SRS-PosResource in the SRS-PosResourceSet corresponding to the UL-SRS resource set i (where S_i is set to 1, or the first UL-SRS resource set 0 indicated in the MAC CE, or the UL-SRS resource set i with the lowest serving cell index) when sorted in ascending order by srs-PosResourceId. The spatial relationship information indicated for SRS-PosResource k can be spatial relationship information including the aggregated resource combination of the corresponding SRS-PosResource k.

[0307] Figures 12A to 12CThe information elements included in each of the MAC CE structure options 12-40, 12-50 and 12-60 are not limited to the combinations in the corresponding embodiments, and combinations of information elements included in different embodiments can actually be included together in the MAC CE.

[0308] At the same time, Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figures 12A to 12C In the description of the embodiments, the term "UL-SRS resource set" can be replaced by expressions such as "location SRS resource set" and "SRS-PosResourceSet", and the term "UL-SRS resource" can be replaced by expressions such as "location SRS resource" and "SRS-PosResource". These alternative expressions can essentially have the same meaning.

[0309] Figure 13 A UE device according to an embodiment of the present disclosure is shown.

[0310] refer to Figure 13 The UE may include a radio frequency (RF) processor 13-10, a baseband processor 13-20, a storage device 13-30, and a controller 13-40. The structure of the UE is not limited to... Figure 13 The exemplary structure shown in the figure, and the structure of the UE may include more than Figure 13 The structure shown has more or fewer components.

[0311] RF processor 13-10 can perform functions for transmitting and receiving signals via a wireless channel, such as frequency band conversion and signal amplification. That is, RF processing unit 13-10 can up-convert baseband signals provided from baseband processing unit 13-20 into RF band signals, which can be transmitted via an antenna, and can down-convert RF band signals received via the antenna back into baseband signals. For example, RF processing unit 13-10 may include, but is not limited to, transmit filters, receive filters, amplifiers, mixers, oscillators, digital-to-analog converters (DACs), analog-to-digital converters (ADCs), etc. Although... Figure 13Only one antenna is shown, but the UE may include multiple antennas. Furthermore, the RF processor 13-10 may include multiple RF chains. Additionally, the RF processor 13-10 can perform beamforming. For beamforming, the RF processor 13-10 can adjust the phase and amplitude of each signal transmitted and received through multiple antennas or antenna elements. Furthermore, the RF processor 13-10 can perform MIMO and can receive multiple layers while performing MIMO operation. The RF processor 13-10 can appropriately configure multiple antennas or antenna elements to perform receive beam scanning, or can adjust the direction and beamwidth of the receive beam to resonate with the transmit beam under the control of a controller.

[0312] According to embodiments of this disclosure, baseband processors 13-20 can perform conversion functions between baseband signals and bit strings according to the physical layer specifications of the system. For example, during data transmission, baseband processors 13-20 can encode and modulate the transmitted bit string to generate complex symbols. Furthermore, during data reception, baseband processors 13-20 can demodulate and decode the baseband signal provided from RF processors 13-10 to recover the received bit string. For example, when following an Orthogonal Frequency Division Multiplexing (OFDM) scheme, during data transmission, baseband processors 13-20 can encode and modulate the transmitted bit string to generate complex symbols, which can be mapped to subcarriers and configured using inverse Fast Fourier Transform (IFFT) operations and cyclic prefix (CP) insertion. Furthermore, during data reception, the baseband processor 13-20 can separate the baseband signal provided by the RF processor 13-10 at the OFDM symbol level, recover the signal mapped to the subcarrier through a Fast Fourier Transform (FFT) operation, and recover the received bit string through demodulation and decoding.

[0313] According to embodiments of this disclosure, baseband processor 13-20 and RF processor 13-10 can transmit and / or receive signals as described above. Therefore, baseband processor 13-20 and RF processor 13-10 can be referred to as transmitters, receivers, transceivers, or communication units. Furthermore, at least one of baseband processor 13-20 and RF processor 13-10 may include multiple communication modules to support various different radio access technologies. Additionally, at least one of baseband processor 13-20 and RF processor 13-10 may include different communication modules to process signals in different frequency bands. For example, different radio access technologies may include wireless LAN (e.g., IEEE 802.11), cellular networks (e.g., LTE), etc. Furthermore, different frequency bands may include ultra-high frequency (SHF) (e.g., 2NRHz) bands and millimeter wave (mmWave) (e.g., 60GHz) bands. The UE can transmit / receive signals with the gNB using baseband processor 13-20 and RF processor 13-10, and these signals may include control information and data.

[0314] According to embodiments of this disclosure, storage devices 13-30 can store basic programs, application programs, and data such as configuration information for the operation of a main base station. For example, storage devices 13-30 can store basic programs, application programs, and data information such as configuration information for the operation of a UE. Additionally, storage devices 13-30 can provide the stored data upon request from controllers 13-40. Storage devices 13-30 can be configured using storage media such as ROM, RAM, hard disk, CD-ROM, and DVD, or combinations thereof. Furthermore, storage devices 13-30 can be configured using multiple memories. According to embodiments of this disclosure, storage devices 13-30 can store programs for performing UE location estimation according to this disclosure.

[0315] Controller 13-40 can control the overall operation of the UE. For example, controller 13-40 can send / receive signals through baseband processor 13-20 and RF processor 13-10 to control the operation of the UE, as described above. Figures 1 to 12C As described in [the text].

[0316] Furthermore, controllers 13-40 record data in and read data from storage devices 13-30. For this purpose, controllers 13-40 may include at least one processor. For example, controllers 13-40 may include a communication processor (CP) configured to perform control for communication, and an application processor (AP) configured to control upper-layer applications such as applications. Additionally, according to embodiments of this disclosure, controllers 13-40 may include a multi-connectivity processor 13-42 configured to handle processes operating in multi-connectivity mode. Furthermore, at least one component in the UE may be implemented as a single chip.

[0317] Figure 14 A base station device according to an embodiment of the present disclosure is shown.

[0318] Figure 14 The base stations mentioned above can be included in the network. Furthermore, according to embodiments of this disclosure, network entities (or network functions) can have the same characteristics as... Figure 14 The base station in the example has the same or similar structure. For example, an LMF entity can have the same structure as... Figure 14 The base stations in the series have the same or similar structures.

[0319] like Figure 14 As shown, the base station may include an RF processor 14-10, a baseband processor 14-20, a backhaul communication unit 14-30, a storage device 14-40, and a controller 14-50. The structure of the base station is not limited to... Figure 14 The exemplary structure shown, and the base station may include a larger... Figure 14 The structure shown has more or fewer components. RF processor 14-10 can perform functions for transmitting and receiving signals via a wireless channel, such as frequency band conversion and amplification of signals. For example, RF processor 14-10 can up-convert a baseband signal provided from baseband processor 14-20 to an RF band signal and then transmit it through an antenna, and can down-convert an RF band signal received through the antenna back to a baseband signal. For example, RF processor 14-10 may include transmit filters, receive filters, amplifiers, mixers, oscillators, DACs, and ADCs. Although in Figure 14 Only one antenna is shown, but RF processor 14-10 may include multiple antennas. Furthermore, RF processor 14-10 may include multiple RF chains. Additionally, RF processor 14-10 can perform beamforming. For beamforming, RF processor 14-10 can adjust the phase and amplitude of each signal transmitted and received through multiple antennas or antenna elements. RF processor 14-10 can transmit one or more layers to perform down-MIMO operation.

[0320] According to embodiments of this disclosure, baseband processors 14-20 can perform conversion functions between baseband signals and bit strings according to the physical layer specifications of the system. For example, during data transmission, baseband processors 14-20 can encode and modulate the transmitted bit string to generate complex symbols. Furthermore, during data reception, baseband processors 14-20 can demodulate and decode the baseband signal provided from RF processors 14-10 to recover the received bit string. For example, when following an OFDM scheme, during data transmission, baseband processors 14-20 can encode and modulate the transmitted bit string to generate complex symbols, map the complex symbols to subcarriers, and configure OFDM symbols via IFFT operations and CP insertion. Furthermore, during data reception, baseband processors 14-20 can separate the baseband signal provided from RF processors 14-10 at the OFDM symbol level, recover the signal mapped to the subcarriers via FFT operations, and recover the received bit string via demodulation and decoding. Baseband processors 14-20 and RF processors 14-10 can transmit and receive signals as described above. Therefore, the baseband processor 14-20 and the RF processor 14-10 can be referred to as a transmitter, receiver, transceiver, communication unit, or wireless communication unit. The base station can transmit / receive signals with the UE using the baseband processor 14-20 and the RF processor 14-10, and these signals can include control information and data.

[0321] According to embodiments of this disclosure, backhaul communication unit 14-30 can provide an interface for communicating with other nodes in the network. For example, backhaul communication unit 14-30 can convert bit strings sent from the primary base station to other nodes (e.g., auxiliary base stations or core network) into physical signals, and can convert physical signals received from other nodes into bit strings.

[0322] According to embodiments of this disclosure, storage devices 14-40 can store basic programs, application programs, and data such as configuration information for the operation of the main base station. For example, storage devices 14-40 can store information about bearers assigned to connected UEs, measurement results reported from connected UEs, etc. Additionally, storage devices 14-40 can store information used as criteria for determining whether to provide or terminate multiple connections to a UE. Furthermore, storage devices 14-40 can provide stored data upon request from controllers 14-50. Storage devices 14-40 can be configured using storage media such as ROM, RAM, hard disk, CD-ROM, and DVD, or combinations thereof. Furthermore, storage devices 14-40 can be configured with multiple memories. According to embodiments of this disclosure, storage devices 14-40 can store programs for performing UE location estimation according to this disclosure.

[0323] Controller 14-50 can control the overall operation of the base station. For example, controller 14-50 can send / receive signals through baseband processor 14-20 and RF processor 14-10 or through backhaul communication unit 14-30 to control the operation of the base station, as described above. Figures 1 to 12C As described above. Additionally, controller 14-50 records data in storage device 14-40 and reads data from storage device 14-40. For this purpose, controller 14-50 may include at least one processor. Furthermore, according to embodiments of this disclosure, controller 14-50 may include a multi-connection processor 14-52 configured to handle processes operating in multi-connection mode.

[0324] When implemented in software, a computer-readable storage medium may be provided for storing one or more programs (software modules). The one or more programs stored in the computer-readable storage medium may be configured to be executed by one or more processors within an electronic device. The at least one program includes instructions to cause the electronic device to perform methods according to various embodiments of the present disclosure as defined by the appended claims and / or disclosed herein.

[0325] These programs (software modules or software) can be stored in non-volatile memory, including random access memory and flash memory, read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), disk storage devices, compact disc ROM (CD-ROM), digital universal disc (DVD), or other types of optical storage devices or magnetic tape cassettes. Alternatively, any combination of some or all of them can form the memory storing the programs. Furthermore, multiple such memories can be included in an electronic device.

[0326] Furthermore, the program can be stored in an attachable storage device that can access the electronic device via a communication network such as the Internet, intranet, local area network (LAN), wide area network (WLAN), and storage area network (SAN), or a combination thereof. Such a storage device can access the electronic device via an external port. Additionally, a separate storage device on the communication network can access the device used to execute embodiments of this disclosure.

[0327] In this disclosure, the terms "computer program product" or "computer-readable medium" are generally used to refer to media such as memory, hard disks mounted in hard disk drives, or signals. A "computer program product" or "computer-readable medium" is an element provided to a method for reporting UE capabilities in a wireless communication system according to this disclosure.

[0328] Machine-readable storage media may be provided in the form of non-transitory storage media. Here, the term "non-transitory storage media" simply means that the storage media is a tangible device and does not include signals (e.g., electromagnetic waves), but the term does not distinguish between cases where data is stored semi-permanently in the storage media and cases where data is temporarily stored in the storage media. As an example, "non-transitory storage media" may include buffers for temporarily storing data.

[0329] According to embodiments, methods according to various embodiments of this disclosure may be included and provided in a computer program product. The computer program product can 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., a compact disc read-only memory (CD-ROM)) or via an app store (e.g., the Play Store). TM Online distribution (e.g., downloading or uploading) or direct distribution between two user devices (e.g., smartphones). If distributed online, at least a portion of the computer program product (e.g., a downloadable application) may be temporarily generated or at least temporarily stored in a machine-readable storage medium, such as the memory of a manufacturer's server, an app store's server, or a relay server.

[0330] In the detailed embodiments described above, elements included in this disclosure are represented in a singular or plural form according to the presented embodiments. However, for ease of description, the singular or plural form is suitably chosen for the presented situation, and this disclosure is not limited to elements represented in a singular or plural form. Thus, an element represented in a plural form may also include a single element, or an element represented in a singular form may include multiple elements.

[0331] The embodiments of this disclosure described and illustrated in the specification and drawings are merely specific examples presented to facilitate the explanation of the technical content of this disclosure and to aid in understanding it, and are not intended to limit the scope of this disclosure. That is, it will be apparent to those skilled in the art that other variations based on the technical ideas of this disclosure can be implemented. Furthermore, the various embodiments described above can be combined as needed. For example, a portion of one embodiment of this disclosure can be combined with a portion of another embodiment to operate a base station and a terminal. Additionally, the embodiments of this disclosure can be applied to other communication systems, and other variations based on the technical ideas of the embodiments can also be implemented. For example, the embodiments can be applied to LTE, 5G, NR, or 6G systems. Therefore, the scope of this disclosure should not be limited to the embodiments set forth herein, but should be defined by the appended claims and their equivalents.

Claims

1. A method performed by a terminal in a wireless communication system, the method comprising: Receive a Radio Resource Control (RRC) message, the RRC message including configuration information regarding the combination of aggregated Sound Reference Signal (SRS) resource sets; Receive a Media Access Control - Control Element (MAC CE) for activating or deactivating the aggregated SRS resource set; and Based on at least one aggregated SRS resource set activated by the MAC CE, an SRS for positioning is sent. The MAC CE includes first information indicating the combination of the aggregated SRS resource sets and second information indicating the activation or deactivation status of each aggregated SRS resource set.

2. The method according to claim 1, wherein, The MAC CE also includes third information, which indicates, in ascending order, spatial relationship information of aggregated SRS resources within the SRS resource set first activated by the second information.

3. The method according to claim 2, wherein, The MAC CE also includes fourth information indicating the presence or absence of the third information, and Wherein, under the condition that the MAC CE is used to activate at least one of the aggregated SRS resource sets and the value of the fourth information is set to 1, the third information is included in the MAC CE.

4. The method according to claim 1, wherein, The configuration information includes identifiers indicating the serving cell and bandwidth portion (BWP) associated with each SRS resource set.

5. A method performed by a base station in a wireless communication system, the method comprising: Send a Radio Resource Control (RRC) message, the RRC message including configuration information about the combination of aggregated Sound Reference Signal (SRS) resource sets; Send a Media Access Control - Control Element (MAC CE) for activating or deactivating the aggregated SRS resource set; and Based on at least one aggregated SRS resource set activated by the MAC CE, SRS for positioning is received. The MAC CE includes first information indicating the combination of the aggregated SRS resource sets and second information indicating the activation or deactivation status of each aggregated SRS resource set.

6. The method according to claim 5, wherein, The MAC CE also includes third information, which indicates, in ascending order, spatial relationship information of aggregated SRS resources within the SRS resource set first activated by the second information.

7. The method according to claim 6, wherein, The MAC CE also includes fourth information indicating the presence or absence of the third information, and Wherein, under the condition that the MAC CE is used to activate at least one of the aggregated SRS resource sets and the value of the fourth information is set to 1, the third information is included in the MAC CE.

8. The method according to claim 6, wherein, The configuration information includes identifiers indicating the serving cell and bandwidth portion (BWP) associated with each SRS resource set.

9. A terminal in a wireless communication system, the terminal comprising: transceiver; as well as The controller is configured as follows: The transceiver receives Radio Resource Control (RRC) messages, which include configuration information regarding the combination of aggregated Sound Reference Signal (SRS) resource sets. The transceiver receives a Media Access Control - Control Element (MAC CE) for activating or deactivating the aggregated SRS resource set; and Based on at least one aggregated SRS resource set activated by the MAC CE, SRS for positioning is transmitted via the transceiver. The MAC CE includes first information indicating the combination of the aggregated SRS resource sets and second information indicating the activation or deactivation status of each aggregated SRS resource set.

10. The terminal according to claim 9, wherein, The MAC CE also includes third information, which indicates, in ascending order, spatial relationship information of aggregated SRS resources within the SRS resource set first activated by the second information.

11. The terminal according to claim 10, wherein, The MAC CE also includes fourth information indicating the presence or absence of the third information, and Wherein, under the condition that the MAC CE is used to activate at least one of the aggregated SRS resource sets and the value of the fourth information is set to 1, the third information is included in the MAC CE.

12. The terminal according to claim 9, wherein, The configuration information includes identifiers indicating the serving cell and bandwidth portion (BWP) associated with each SRS resource set.

13. A base station in a wireless communication system, the base station comprising: transceiver; as well as The controller is configured as follows: The transceiver transmits a Radio Resource Control (RRC) message, which includes configuration information regarding the combination of aggregated Sound Reference Signal (SRS) resource sets; The transceiver sends a Media Access Control - Control Element (MAC CE) for activating or deactivating the aggregated SRS resource set; and Based on at least one aggregated SRS resource set activated by the MAC CE, SRS for positioning is received via the transceiver. The MAC CE includes first information indicating the combination of the aggregated SRS resource sets and second information indicating the activation or deactivation status of each aggregated SRS resource set.

14. The base station according to claim 13, wherein, The MAC CE further includes third and fourth information. The third information indicates, in ascending order, the spatial relationship information of aggregated SRS resources within the SRS resource set first activated by the second information. The fourth information indicates whether the third information exists. Wherein, under the condition that the MAC CE is used to activate at least one of the aggregated SRS resource sets and the value of the fourth information is set to 1, the third information is included in the MAC CE.

15. The base station according to claim 13, wherein, The configuration information includes identifiers indicating the serving cell and bandwidth portion (BWP) associated with each SRS resource set.

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