Data collection method and apparatus for training beam prediction model in wireless communication system

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. More specifically, a method performed by a terminal in a wireless communication system may comprise the steps of: receiving configuration information related to beam management based on beam prediction from a base station; performing measurements related to beam management based on beam prediction at a plurality of measurement time points, respectively, based on the configuration information; and transmitting a measurement report to the base station, the measurement report including results of the measurements performed at the plurality of measurement time points, respectively.

Description

TECHNICAL FIELD

[0001] The disclosure relates to a data collection method and apparatus for training an artificial intelligence (AI) and machine learning (ML) model for predicting beam information between a base station and a terminal in a mobile communication system. BACKGROUND

[0002] 5G mobile communication technologies define wide frequency bands so that high transmission rates and new services are possible, and are implemented not only in "Sub 6 GHz" bands such as 3.5 GHz, but also in "Above 6 GHz" bands referred to as mmWave, including 28 GHz and 39 GHz. Furthermore, it has been considered to implement 6G mobile communication technologies (referred to as Beyond 5G systems) in Terahertz bands (for example, 95 GHz to 3 THz bands) in order to accomplish transmission rates higher than 5G mobile communication technologies and ultra-low latencies of about 100 μs.

[0003] At the time when the development of 5G mobile communication technologies is in progress, in order to support services and meet requirements related to Enhanced Mobile Broadband (eMBB), Ultra-Reliable and Low Latency Communications (URLLC), and massive Machine-Type Communications (mMTC), standardizations are being made regarding technologies such as beamforming and massive MIMO for mitigating radio-wave path loss and increasing radio-wave transmission distances in mmWave, a dynamic operation supporting numerologies (for example, operating multiple subcarrier spacings) and slot formats for effectively utilizing mmWave resources, initial access techniques supporting multi-beam transmission and widebands, definition and operation of a BWP (BandWidth Part), new channel coding methods such as a LDPC (Low Density Parity Check) code for large amounts of data transmission and a polar code for high reliable transmission of control information, L2 pre-processing, and network slicing for providing a dedicated network dedicated to a specific service.

[0004] At present, in consideration of services to be supported by 5G mobile communication technologies, discussions are in progress regarding improvements and performance enhancements of initial 5G mobile communication technologies, and there has been physical layer standardization regarding technologies such as V2X (Vehicle-to-Everything) for assisting in driving determination of self-driving vehicles based on information about positions and statuses of vehicles transmitted by the vehicles and for enhancing user convenience, NR-U (New Radio Unlicensed) aiming to make system operations comply with various regulatory requirements in unlicensed bands, NR UE power saving, Non-Terrestrial Network (NTN) that is UE-satellite direct communication as a means for providing coverage in areas where communication with terrestrial networks is unavailable, and positioning.

[0005] Further, in the field of radio interface architecture / protocol, standardization is underway regarding technologies such as Industrial Internet of Things (IIoT) for supporting new services through interworking and convergence with other industries, IAB (Integrated Access and Backhaul) for providing a node for network service area expansion by supporting a wireless backhaul link and an access link in an integrated manner, mobility enhancement including conditional handover and DAPS (Dual Active Protocol Stack) handover, and two-step random access (2-step RACH for NR) for simplifying random access procedures. In terms of system architecture / service, standardization is also underway regarding a 5G baseline architecture (e.g., service-based architecture or service-based interface) for combining Network Function Virtualization (NFV) and Software-Defined Networking (SDN) technologies, and mobile edge computing (MEC) for receiving services based on UE location.

[0006] As the commercialization of 5G mobile communication systems, connected devices, which have increased exponentially, will be connected to communication networks, and thus enhanced functionality and performance of 5G mobile communication systems and integrated operations of connected devices are expected to be necessary. For this, new research related to extended reality (XR) for efficiently supporting AR (Augmented Reality), VR (Virtual Reality), MR (Mixed Reality), etc., improvement of 5G performance and reduction of 5G complexity by utilizing artificial intelligence (AI) and machine learning (ML), AI service support, metaverse service support, and drone communication are planned.

[0007] Further, such development of 5G mobile communication systems will serve as a basis for not only developing new waveforms for providing coverage of terahertz bands for 6G mobile communication technologies, multi-antenna transmission technologies such as FDD-MIMO (Full Dimensional MIMO), array antennas, and massive antennas, lenses and antennas based on metamaterials for improving terahertz band signal coverage, high-dimensional space multiplexing technology using OAM (Orbital Angular Momentum), and RIS (Reconfigurable Intelligent Surface), but also developing full-duplex technologies for improving frequency efficiency of 6G mobile communication technologies and ameliorating system networks, AI-based communication technologies for implementing system optimization by utilizing satellites and AI (Artificial Intelligence) from the design stage and internalizing end-to-end AI support functions, and next-generation distributed computing technologies for implementing services at a level of complexity exceeding the limit of UE operating capabilities by utilizing super-high-performance communication and computing resources.

[0008] As the mobile communication system advances as described above, various services can already be provided, and thus a method of efficiently providing such services is needed. SUMMARY

[0009] [TECHNICAL PROBLEM]

[0010] Based on the discussion as described above, the disclosure provides a device and method capable of efficiently providing a service in a wireless communication system.

[0011] [Solution to the problem]

[0012] In a method performed by a terminal in a wireless communication system, the method can include receiving, from a base station, configuration information related to beam prediction based beam management, performing measurements related to the beam prediction based beam management based on the configuration information, respectively at a plurality of measurement time points, and transmitting, to the base station, a measurement report including results of the measurements performed, respectively at the plurality of measurement time points.

[0013] In a method performed by a base station in a wireless communication system, the method can include transmitting, to a terminal, configuration information related to beam prediction based beam management, and receiving, from the terminal, a measurement report including results of measurements related to the beam prediction based beam management based on the configuration information, the measurements being performed, respectively at a plurality of measurement time points.

[0014] In a terminal in a wireless communication system, the terminal can include a transceiver and a controller connected to the transceiver, wherein the controller is configured to receive, from a base station, configuration information related to beam prediction based beam management, perform measurements related to the beam prediction based beam management based on the configuration information, respectively at a plurality of measurement time points, and transmit, to the base station, a measurement report including results of the measurements performed, respectively at the plurality of measurement time points.

[0015] In a base station in a wireless communication system, the base station can include a transceiver and a controller connected to the transceiver, wherein the controller is configured to transmit, to a terminal, configuration information related to beam prediction based beam management, and receive, from the terminal, a measurement report including results of measurements related to the beam prediction based beam management based on the configuration information, the measurements being performed, respectively at a plurality of measurement time points.

[0016] [Advantages of the invention]

[0017] The disclosure provides a device and method capable of efficiently providing a service in a wireless communication system. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A structure of an NR system according to an embodiment of the disclosure is illustrated.

[0019] Figure 2 is a diagram illustrating a radio protocol structure in LTE and NR systems according to an embodiment of the disclosure.

[0020] Figure 3A beam management procedure between a base station and a UE in a wireless communication system according to embodiments of the disclosure is shown.

[0021] Figure 4 Use cases of applying AI / ML models to beam information prediction and procedures of training and deploying AI / ML models in a wireless communication system according to embodiments of the disclosure are shown.

[0022] Figure 5 is a flowchart showing a procedure according to embodiments of the disclosure in which, for training a model that predicts beam information in the time domain, a base station instructs a UE in an RRC_CONNECTED state to perform continuous beam measurements and receives a result report.

[0023] Figure 6 is a flowchart showing a procedure according to embodiments of the disclosure in which, for training a model that predicts beam information in the spatial domain, a base station instructs a UE in an RRC_CONNECTED state to perform measurements on all beams or a specific combination of beams and receives a result report.

[0024] Figure 7 is a flowchart showing a procedure according to embodiments of the disclosure in which, for training a model that predicts beam information in the spatial domain and / or the time domain, a base station instructs a UE to measure beams in an RRC_IDLE / RRC_INACTIVE state and receives a result report.

[0025] Figure 8 is a flowchart showing a procedure according to embodiments of the disclosure in which, for training a model that predicts beam information in the time domain, a base station instructs a UE to perform continuous beam measurements after the UE transitions from an RRC_IDLE / RRC_INACTIVE state to an RRC_CONNECTED state.

[0026] Figure 9 A UE device according to embodiments of the disclosure is shown.

[0027] Figure 10 A base station device according to embodiments of the disclosure is shown.

[0028] Figure 11 is a block diagram showing an example of the structure of a UE according to embodiments of the disclosure.

[0029] Figure 12 is a block diagram showing an example of the structure of a base station according to embodiments of the disclosure. DETAILED DESCRIPTION

[0030] In the following, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In describing the present disclosure, detailed descriptions of known functions or configurations incorporated herein will be omitted where it is determined that the description might unnecessarily obscure the subject matter of the disclosure. Such omission of unnecessary description is intended to prevent obscuring the main ideas of the present disclosure and to convey the main ideas more clearly.

[0031] The terminology described below is defined with reference to the functionality of this disclosure and may vary depending on the user, the user's intent, or habits. Therefore, the definition of the terminology should be based on the entire contents of this specification.

[0032] For the same reason, some elements may be exaggerated, omitted, or shown schematically in the accompanying drawings. Furthermore, the dimensions of each element do not perfectly reflect its actual size.

[0033] 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 this disclosure, the same or similar reference numerals denote the same or similar elements.

[0034] In this document, it should be understood that each block of the flowchart illustration, and combinations of blocks in the flowchart illustration, 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 including 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.

[0035] Also, each block in the flowchart illustrations can represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the blocks can occur out of the order noted in the figures. For example, two blocks shown in succession may, in some alternative implementations, be executed substantially concurrently, or the blocks can sometimes be executed in the reverse order, depending upon the functionality involved.

[0036] As used in the embodiments of the present disclosure, the term "unit" refers to a software element or a hardware element such as a field-programmable gate array (FPGA) or an application-specific integrated circuit (ASIC), and can perform some functions. However, the "unit" does not always have a meaning limited to software or hardware. The "unit" can be constructed as a storage medium that stores software elements or as one or more processors that execute the software elements. Thus, the "unit" includes, for example, software elements, object-oriented software elements, class elements or task elements, processes, functions, attributes, procedures, subroutines, segments of program codes, drivers, firmware, microcodes, circuits, data, database, data structures, tables, arrays, and parameters. The elements and functions provided by the "unit" can be either combined into a smaller number of elements and "units" or divided into a larger number of elements and "units." The element and "unit" can also be implemented to be one or more CPUs in a device or security multimedia card that reproduce devices. Further, the "unit" in the embodiments can include one or more processors.

[0037] In describing the present disclosure below, a detailed description of known functions or configurations incorporated herein will be omitted when it is determined that the subject matter of the present disclosure is unnecessarily obscured by the detailed description. In the following, embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0038] In the following description, terms for identifying access nodes, terms for referring to network entities, terms for referring to messages, terms for referring to interfaces between network entities, terms for referring to various identification information, and the like are used illustratively in order to describe the principles of the present disclosure. Thus, the present disclosure is not limited by the terms as described below, and other terms for referring to the subject matter having equivalent technical meanings can also be used.

[0039] In the following description, the terms "physical channel" and "signal" can be used interchangeably with the term "data" or "control signal." For example, the term "physical downlink shared channel (PDSCH)" refers to a physical channel on which data is transmitted, but the PDSCH can also be used to refer to "data." That is, in the present disclosure, the expression "transmitting a physical channel" can be interpreted to have the same meaning as the expression "transmitting data or a signal through a physical channel."

[0040] In the following description of the disclosure, upper layer signaling refers to a signal transmission scheme from a base station to a terminal through a downlink data channel of a physical layer, or a signal transmission scheme from a terminal to a base station through an uplink data channel of a physical layer. The upper layer signaling can also be understood as radio resource control (RRC) signaling or a medium access control (MAC) control element (CE).

[0041] In the following description of the disclosure, for the convenience of description, terms and names defined in the 3rd Generation Partnership Project New Radio (3GPP NR) or 3GPP Long Term Evolution (3GPP LTE) standard will be used. However, the disclosure is not limited by these terms and names, and can be applied in the same manner to systems conforming to other standards. In the disclosure, for the convenience of description, the term "gNB" can be used interchangeably with the term "eNB". That is, a base station described as "eNB" can refer to "gNB". In addition, the term "terminal" can refer not only to a mobile phone, an MTC device, an NB-IoT device, and a sensor, but also to other wireless communication devices.

[0042] In the following description, a base station is an entity that allocates resources to a terminal, and can be at least one of a gNode B (gNB), an eNodeB (eNB), a node B, a base station (BS), a wireless 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 a communication function. Of course, examples of the base station and the terminal are not limited to those mentioned above.

[0043] In the disclosure, "downlink (DL)" refers to a radio link via which a base station transmits a signal to a terminal, and "uplink (UL)" refers to a radio link via which a terminal transmits a signal to a base station. In addition, in the following description, LTE, LTE-A, or a 5G system can be described by way of example, but embodiments of the disclosure can also be applied to other communication systems having a similar technical background or channel type. Examples of such a communication system can include a fifth generation mobile communication technology (5G, New Radio, and NR) developed beyond LTE-A, and in the following description, "5G" can be a concept covering existing LTE, LTE-A, and other similar services. In addition, based on the determination of those skilled in the art, the disclosure can also be applied to other communication systems with some modifications without significantly departing from the scope of the disclosure.

[0044] Wireless communication systems are developing toward broadband wireless communication systems to provide high-speed and high-quality packet data services using communication standards such as 3GPP's High Speed Packet Access (HSPA), LTE (Long Term Evolution or Evolved Universal Terrestrial Radio Access (E-UTRA)), LTE-A (LTE-Advanced), LTE-Pro, 3GPP2's High Rate Packet Data (HRPD), Ultra Mobile Broadband (UMB), IEEE 802.16e, etc., as well as typical voice-based services.

[0045] As a typical example of a broadband wireless communication system, an LTE system employs an Orthogonal Frequency Division Multiplexing (OFDM) scheme in a downlink (DL) and a Single Carrier Frequency Division Multiple Access (SC-FDMA) scheme in an uplink (UL). The uplink refers to a radio link via which a user equipment (UE) or a mobile station (MS) transmits data or control signals to a base station (BS, eNode B, or gNode B), and the downlink refers to a radio link via which the base station transmits data or control signals to the UE. The above-described multiple access scheme can separate data or control information of individual users by allocating and operating time-frequency resources for transmitting data or control information for each user to avoid overlapping each other, i.e., to establish orthogonality.

[0046] Since a 5G communication system, which is a post-LTE communication system, must freely reflect various requirements of users, service providers, etc., services satisfying various requirements must be supported. Services considered in the 5G communication system include enhanced mobile broadband (eMBB) communication, massive machine type communication (mMTC), ultra reliability low latency communication (URLLC), etc.

[0047] The eMBB aims to provide a higher data rate than that supported by the existing LTE, LTE-A, or LTE-Pro. For example, in the 5G communication system, the eMBB must provide a peak data rate of 20 Gbps in the downlink and a peak data rate of 10 Gbps in the uplink for a single base station. In addition, the 5G communication system must provide an increased user-perceived data rate, as well as a maximum data rate, to the UE. In order to meet such requirements, transmission / reception techniques including further enhanced Multiple Input Multiple Output (MIMO) transmission techniques need to be improved. In addition, a frequency bandwidth greater than 20 MHz can be used in a frequency band of 3 to 6 GHz or 6 GHz or more to obtain the data rate required for the 5G communication system, instead of using a transmission bandwidth of up to 20 MHz in a 2 GHz frequency band used in LTE to transmit a signal.

[0048] Further, mMTC is considered to support application services such as Internet of Things (IoT) in a 5G communication system. To efficiently provide the Internet of Things, mMTC has requirements such as supporting connection of a large number of UEs in a cell, enhancing coverage of UEs, improving battery time, reducing cost of UEs, and the like. Since the Internet of Things provides a communication function while being provided to various sensors and various devices, it must support a large number of UEs (for example, 1,000,000 UEs / km2) in a cell. In addition, a UE supporting mMTC can need a wider coverage than a coverage of other services provided by the 5G communication system because the UE can be located in a shadow area such as a basement of a building, which is not covered by a cell due to the nature of the service. The UE supporting mMTC must be configured to be inexpensive, and can need a very long battery life such as 10 to 15 years because it is difficult to frequently replace a battery of the UE.

[0049] Finally, URLLC is a mission-critical wireless communication service based on a cell. For example, URLLC can be used for services such as remote control of robots or machines, industrial automation, unmanned aerial vehicles, remote healthcare, and emergency alerts. Therefore, URLLC must provide communication with ultra-low latency and ultra-high reliability. For example, a service supporting URLLC must satisfy an air interface latency of less than 0.5 ms, and also needs a packet error rate of 10 -5 or less. Therefore, for a service supporting URLLC, the 5G system must provide a shorter transmission time interval (TTI) than other services, and can also need a design that allocates a large amount of resources in a frequency band to secure reliability of a communication link.

[0050] The three services in 5G, eMBB, URLLC, and mMTC, can be multiplexed and transmitted in a single system. In this case, different transmission / reception techniques and transmission / reception parameters can be used between services in order to satisfy different requirements of individual services. Of course, 5G is not limited to the above three services.

[0051] Figure 1 A structure of an NR system according to an embodiment of the disclosure is illustrated.

[0052] Referring to Figure 1 The wireless communication system can include a plurality of base stations (for example, gNBs 105, ng-eNBs 110, ng-eNBs 115, and gNBs 120), an access and mobility management function (AMF) 125, and a user plane function (UPF) 130. A user equipment (hereinafter, referred to as a UE or a terminal) 135 can access an external network through the base stations (for example, gNBs 105, ng-eNBs 110, ng-eNBs 115, and gNBs 120) and the UPF 130.

[0053] In Figure 1 , the base station (e.g., gNB 105, ng-eNB 110, ng-eNB 115, and gNB 120) can provide radio access to the UE accessing the network as a cellular network access node. That is, in order to serve the user's traffic, the base station (e.g., gNB 105, ng-eNB 110, ng-eNB 115, and gNB 120) can collect state information of the UE, such as buffer status, available transmission power status, and channel status, and schedule accordingly, thereby supporting connection between the UE and the core network (CN; in particular, the CN in NR is called "5GC"). The communication system can be divided into a user plane (UP) associated with actual user data transmission and a control plane (CP) such as connection management, and in the drawings, the gNB 110 and the gNB 105 can use the UP and CP techniques defined in NR technology, and the ng-eNB 110 and the ng-eNB 115 can use the UP and CP techniques defined in LTE technology, although connected to the 5GC.

[0054] The AMF 125 is a device responsible for various control functions as well as mobility management functions of the UE, and can be connected to a plurality of base stations, and the UPF 130 can refer to a kind of gateway device for providing data transmission. Although not shown in Figure 1 , the NR wireless communication system can include a session management function (SMF). The SMF can manage a packet data network connection provided to the UE, such as a protocol data unit (PDU) session.

[0055] Figure 2 A radio protocol structure in LTE and NR systems according to an embodiment of the disclosure is illustrated.

[0056] Referring to Figure 2Radio protocols of the LTE system can include a packet data convergence protocol (PDCP) 205 or 240, a radio link control (RLC) 210 or 235, and a medium access control (MAC) 215 or 230 on each of the UE and ENB sides. The packet data convergence protocol (PDCP) 205 or 240 is responsible for operations such as IP header compression / reconstruction, and the radio link control (hereinafter, “RLC”) 210 or 235 reconfigures PDCP protocol data units (PDUs) to appropriate sizes. The MAC 215 or 230 is connected to several RLC layer devices configured in a single UE, and performs operations of multiplexing / demultiplexing RLC PDUs into / from MAC PDUs. The physical (PHY) layer 220 or 225 can perform operations of channel coding and modulation on upper layer data, thereby obtaining OFDM symbols, and delivering the OFDM symbols through a radio channel, or demodulating OFDM symbols received through a radio channel, channel decoding the OFDM symbols, and delivering the OFDM symbols to an upper layer. For additional error correction, the PHY layer also uses hybrid ARQ (HARQ), and the receiving end uses one bit to transmit whether a packet transmitted by the transmitting end is received. This is referred to as HARQ ACK / NACK information. In the case of LTE, downlink HARQ ACK / NACK information in response to uplink data transmission can be transmitted via a physical ARQ indicator channel (PHICH), and in the case of NR, whether retransmission is needed or only new transmission must be performed can be determined by UE scheduling information via a physical dedicated control channel (PDCCH), which is a channel via which downlink / uplink resource allocation, etc. is transmitted. This is because asynchronous HARQ is applied in NR. Uplink HARQ ACK / NACK information in response to downlink data transmission can be transmitted through a physical uplink control channel (PUCCH) or through a physical uplink shared channel (PUSCH). The PUCCH is generally transmitted in the uplink of a PCell as described below, but the base station can additionally transmit it to a corresponding UE in an SCell, which is referred to as a PUCCH SCell, if the UE supports.

[0057] Although not shown in the drawings, a radio resource control (RRC) layer can exist as a higher layer than each PDCP layer of the UE and the base station, and the RRC layer can exchange access / measure related configuration control messages for radio resource control.

[0058] The PHY layer can include one or more frequencies / carriers, and a technology for simultaneously configuring and using multiple frequencies is referred to as carrier aggregation (hereinafter, CA). The CA refers to a technology in which, instead of using only one carrier for communication between a UE and an E-UTRAN Node B (eNB), one main carrier and a plurality of secondary carriers are additionally used, and thus a data capacity can be greatly increased as many as the number of secondary carriers. In LTE and NR systems, a cell in a base station using a primary carrier can be referred to as a primary cell or a PCell, and a cell in a base station using a secondary carrier can be referred to as a secondary cell or an SCell.

[0059] Figure 3 A beam management procedure between a base station and a UE in a next-generation mobile communication system according to an embodiment of the disclosure is illustrated.

[0060] Reference Figure 3 The base station 305 can instruct the UE 300 to perform layer 1 (L1) and layer 3 (L3) layer beam measurements in order to select (or manage) beams to be used for DL and UL transmissions with the UE 300, and can receive their result values. The specific steps of each operation are as follows.

[0061] In operation 310, the UE and the base station can obtain initial Tx and Rx beams to be used for DL and UL transmissions through a random access procedure.

[0062] In operation 320, the base station can instruct the UE to perform beam measurements and result reporting through an RRCReconfiguration procedure in order to appropriately change beams to be used for DL and UL transmissions based on movement of the UE and channel environment changes. In this case, the base station can instruct the UE to perform both beam measurements and reporting at the L1 layer and beam measurements and reporting at the L3 layer. In addition, the base station can configure various transmission configuration indicator (TCI) state information for indicating beam information to be used for DL and UL transmissions of the UE. This TCI state information can be used to indicate beam information to be used for DL and UL transmissions of the UE to the UE in operation 143 below.

[0063] In operation 330, the UE can perform signal measurement on a specific frequency, cell, or beam according to the indication from the base station in operation 320, and can transmit a MeasurementReport when a transmission condition of the L3 layer MeasurementReport is satisfied. In this case, when the UE has an L3 beam measurement result for a specific cell, as indicated by reference numeral 333, the result can be included in the MeasurementReport (330). The L3 beam measurement result can include a list of SSB and CSI-RS indexes transmitted using multiple beams, and at least one of an L3 reference signal received power (RSRP) measurement result, an L3 reference signal received quality (RSRQ) measurement result, and an L3 signal-to-interference-plus-noise ratio (SINR) measurement result corresponding to each index. In this case, the UE can include measurement results for up to 64 SSB and CSI-RS indexes.

[0064] In operation 340, the UE can measure beams of a serving cell according to the indication from the base station in operation 320, and periodically report measurement results to the base station through a CSI report. According to the base station configuration described in operation 320, the UE can include up to four SS / PBCH block resource indication (SSBRI) CSI reference signal resource indicators (CRIs) and corresponding L1 RSRP information in a periodically transmitted CSI report 341, as indicated by reference numeral 349. In this case, the SSBRI and CRI included in the CSI report can be selected in descending order of beam quality.

[0065] In operation 343, the best beam for DL and UL transmission of the UE can be changed according to movement of the UE or a change in a wireless channel environment.

[0066] In operation 345, the UE can report measurement results for the changed best beam to the base station through a CSI report.

[0067] In operation 347, the base station can identify that the best beam for DL and UL transmission between the base station and the UE has been changed based on the CSI report transmitted by the UE in operation 145, and can provide a DL and UL beam change indication to the UE. To this end, a MAC CE (e.g., a TCI state indication for a UE-specific PDCCH MAC CE, or a TCI state activation / deactivation for a UE-specific PDSCH MAC CE, etc.) and a DCI (e.g., a DCI format 1_1) can be used.

[0068] Figure 4 A use case in which an AI / ML model is applied to beam information prediction and a procedure of training or deploying an AI / ML model in a next-generation mobile communication system according to an embodiment of the disclosure is illustrated.

[0069] Referring to Figure 4 An AI / ML model can be used to predict beam information in a spatial domain and a time domain.

[0070] In a use case 440 for predicting beam information in a spatial domain, an AI / ML model can be trained to output predicted results 445 of all beams (e.g., L1 / L3 RSRP predicted results of all beams) that need to be measured, when inputting measurement information 441 of some beams (e.g., L1 / L3 RSRP measurement results of some beams). In this case, the measurement information 441 of some beams can include a subset 442 of the entire set of beams to be predicted or another set of beams 443 that does not belong to the entire set of beams to be predicted. In the case where an AI / ML model for predicting beam information in a spatial domain is deployed and used at a base station side, even if a UE includes only measurement results of some beams in a beam measurement result report 333 included in a L3 measurementReport (330) in Figure 3 In the case where a UE reports measurement results 349 of a restricted set of beams in a CSI report 341 in Figure 3 In the case where a UE reports measurement results 349 of a restricted set of beams in a CSI report 341 in

[0071] In a use case 450 for predicting beam information in a time domain, an AI / ML model can be trained to output predicted results 455 of all beams in the future (e.g., L1 / L3 RSRP predicted results of all beams during a time period t_k+1 to t_k+F), when inputting measurement information 453 of some beams obtained in the past (e.g., L1 / L3 RSRP measurement results of some beams measured during a time period t_1 to t_k). In this case, the measurement information 453 of some beams obtained in the past can be a subset of the entire set of beams to be predicted in the future, or another set of beams that does not belong to the entire set of beams to be predicted. In the case where an AI / ML model for predicting beam information in a time domain is deployed and used at a base station side, the base station can more quickly predict an optimal beam of a UE moving at a high speed, thereby changing a beam for DL and UL transmission at an appropriate timing. More specifically, in the case where a UE moves at a high speed, the base station can more quickly predict an optimal beam of the UE by using an AI / ML model, thereby changing a beam for DL and UL transmission at an appropriate timing. Figure 3In the meantime, the base station can periodically receive a CSI report from the UE and can change the beam for DL and UL transmission based on the beam information contained in the CSI report. However, since the base station receives the CSI report according to the CSI report interval, there can be a delay time (latency) (hereinafter referred to as "beam change latency") between the actual time point 443 at which the optimal beam is actually changed due to a change in the channel environment and the actual time point 445 at which the base station receives the CSI report from the UE and identifies the change in the optimal beam. In addition, when the UE is moving at high speed, such beam change latency can cause beam management failure. The beam information prediction method according to the embodiment of the disclosure can prevent beam management failure when the UE is moving at high speed by having the base station predict beam information in the time domain using an AI / ML model, thereby allowing the base station to predict the optimal beam change in advance and change the beam for DL and UL transmission at the appropriate time.

[0072] In the disclosure, the embodiment in which the base station uses the beam prediction AI / ML model is described only as an example of a use case in which the AI / ML model is employed to predict beam information in the spatial and time domains. However, this is only an example, and the beam prediction AI / ML model can also be used at the UE. In this case, the UE can reduce the beam measurement load by performing measurement on only some beam sets, not all beam sets, during the beam measurement operation and predicting the measurement results of all beam sets by using the beam prediction model in the spatial domain. In addition, the UE can predict the optimal beam in advance using the time domain beam prediction model and report the prediction result to the base station in advance, thereby helping the base station to switch the beam at the appropriate time.

[0073] The spatial domain / temporal beam prediction AI / ML model according to embodiments of the disclosure can be trained in the network 405. To this end, as in operation 410, the network can instruct the UE to measure and report data required for training the beam prediction AI / ML model. Thereafter, in operation 415, the UE can perform beam measurement according to the network instruction in operation 410, and can report the measurement results to the network. In operation 420, the network can perform training of the spatial domain / temporal beam prediction AI / ML model based on the beam measurement result information collected from the UE in operation 415. According to an embodiment, the training of the model can be performed by a network entity other than the base station (gNB) (e.g., an operation, administration, and maintenance (OAM) server, a trace collection entity (TCE) server, etc.). When the model is trained by another network entity other than the base station, in operation 415, the base station can transfer the beam measurement result information collected from the UE to another network entity. In addition, the beam prediction AI / ML model trained by another network entity can be transferred back to the base station. When it is desired to deploy the beam prediction AI / ML model trained in operation 420 for use in the UE, in operation 430, the network can transmit the trained model to the UE. Thereafter, the beam prediction AI / ML model can be deployed and operated in the UE 435 or the network 437.

[0074] In Figure 5 , Figure 6 , Figure 7 and Figure 8 , specific embodiments of a method and procedure in which the network instructs the UE to perform beam measurement and reporting required for training of a beam prediction AI / ML model and receives a result report are described.

[0075] Figure 5 is a flowchart illustrating a procedure in which, in order to train a model that predicts beam information in the time domain, the base station instructs the UE in an RRC_CONNECTED state to perform continuous beam measurement and receives a result report, according to an embodiment of the disclosure.

[0076] Referring to Figure 5 , the base station can train a model that predicts beam information in the time domain (indicated by reference numeral 510) based on continuous measurement information of all beams (e.g., measurement results of each of all beams at times t_n, t_n+1, t_n+2,..., t_k). In other words, in order to train a model for predicting beam information in the time domain, the base station can need continuous measurement information of all beams 510 in the time domain.

[0077] To this end, the base station can instruct the UE in RRC_CONNECTED state to report L1 or L3 beam measurement results (more specifically, L1 or L3 RSRP / RSRQ / SINR values calculated by measuring SSB and CSI-RS transmitted through different beams) through RRC signaling. To this end, the basic (general or conventional) operation procedure 520 between the base station and the UE is as follows.

[0078] In operation 521, the base station can instruct the UE to perform measurement and result reporting on a specific frequency, cell, and beam through the RRCReconfiguration procedure. More specifically, the base station can provide the UE with an indication of the frequency, cell, and beam for measurement (i.e., SSB or CSI-RS transmitted using a specific beam) through the RRCReconfiguration message. In addition, in order to instruct the UE when it can measure the SSB or CSI-RS transmitted using a specific beam, the base station can include measurement timing configuration information (SMTC: SSB Measurement Timing Configuration) in the RRCReconfiguration message. In addition, the base station can instruct information related to measurement result reporting, such as a report type (reportType: periodic or eventTriggered) and a reference signal type (rsType: SSB or CSI-RS) to which the measurement result is to be reported, through the RRCReconfiguration message. At this time, ReportInterval, reportAmount, and the like values can also be configured together.

[0079] In operation 522, the UE can measure SSBs and CSI-RSs in each SMTC period 524 (which can be configured as 5ms, 10ms, 20ms, 40ms, 80ms, or 160ms) according to the beam measurement and result reporting configuration provided by the base station in operation 521. When the result reporting type is configured as “periodic”, the UE can perform the first measurement, and at the time point at which the result value can be reported, the corresponding measurement result can be included in the MeasurementReport (523) and reported to the base station. Thereafter, the UE can periodically transmit the MeasurementReport in operation 521 at the ReportInterval 527 (which can be configured as 120ms, 240ms, 480ms, 640ms, 1024ms, 2048ms, 5120ms, 10240ms, 20480ms, 40960ms, 1 minute, 6 minutes, 12 minutes, or 30 minutes) configured by the base station. When the MeasurementReport (529) is transmitted, the UE can include the most recently measured SSB and CSI-RS measurement result 525 in the MeasurementReport and report it to the base station. On the other hand, when the result reporting type is configured as “eventTriggered”, the UE can measure SSBs and CSI-RSs in each SMTC period and determine whether the configured event occurrence condition is satisfied. When the event occurrence condition is satisfied, the transmission of the MeasurementReport message can be initiated.

[0080] As in the basic operation flow embodiment 520, when the ReportingInterval 527 is configured to have a value greater than the SMTC period 524, only a part of the measurement result information (SSB / CSI-RA measurement #1 and SSB / CSI-RA measurement #K) that the UE actually measures in each SMTC period in the time domain can be reported to the base station. However, the base station can train the time-domain beam prediction model based on the continuous beam measurement information of all beams that the UE actually measures in each SMTC period. Therefore, in order for the base station to receive the continuous beam measurement information required to train the time-domain beam prediction model from the UE, the basic beam measurement and reporting operation flow 520 can be enhanced to operation flow 530. In other words, the base station according to an embodiment of the disclosure can receive the continuous beam measurement information required to train the time-domain beam prediction model from the UE based on the operation flow 530.

[0081] In operation 531, the base station can instruct the UE to perform measurement and result reporting on a specific frequency, cell, and beam through the RRCReconfiguration procedure. The specific configuration information transmitted by the base station to the UE through the RRCReconfiguration message can include, for example, at least a part of the frequency, cell, and beam (i.e., SSB or CSI-RS transmitted using a specific beam) for measurement, measurement time configuration information, reporting type, reference signal type, reporting interval, or reporting quantity as described in operation 521. In addition, in order for the base station to receive continuous beam measurement information required for training the time domain beam prediction model from the UE, at least a part of the following information can be additionally included in the RRCReconfiguration message.

[0082] -ReportInterval (with a lower value): A newly defined ReportInterval value equal to or less than the SMTC period 534 can be provided so that the UE can report all result values obtained by performing SSB or CSI-RS measurement at each SMTC period 534 to the base station. For example, values that can be currently configured as the SMTC period (5 ms, 10 ms, 20 ms, 40 ms, 80 ms, 160 ms) can be newly included in the configurable ReportInterval value. For this, a new ReportInterval field and IE can be defined. However, in this case, the UE can transmit the L3MeasurementReport message more frequently, and the quality of other user data transmission can be degraded. To avoid this problem, the base station can configure the UE to store (record) the result values measured in the SMTC period and report a plurality of measurement results together included in the L3measurementReport. For this, a recording indicator can be introduced.

[0083] Logging Indicator: A new indicator (e.g., logging) can be defined for the UE to log all the measurement results (e.g., SSB / CSI-RA measurement #2, SSB / CSI-RA measurement #3, …, SSB / CSI-RA measurement #k) obtained between Measurement Reports 533 and 539, such that when SSB or CSI-RS measurements are performed at each SMTC period 534 and the result values are obtained, the UE can report all the logged measurement results to the base station together at the time of Measurement Report 539. In the case that the base station configures the value of the corresponding indicator (logging) to be “true”, the UE can log all the measurement results obtained at each SMTC period 534, and then can report all the logged measurement results to the base station at the time of Measurement Report 539. After the UE reports the logged measurement results to the base station, the UE can delete the reported result values from its memory, and can newly log the subsequent measurement results.

[0084] Logging Interval: When the logging indicator is configured, the base station can configure a separate Logging Interval. When the logging Interval is configured, the UE can log the most recent measurement result values at each logging Interval. If the Logging Interval value is not configured, the UE can perform logging at each SMTC period 534.

[0085] L1 Measurement Indication: When the base station needs to report L1 measurement results (e.g., L1 RSRP / RSRQ / SINR) rather than L3 measurement results filtered in the time domain, in order to train a beam prediction model, the base station can include a 1-bit indicator for indicating the UE to report L1 measurement results in the RRCReconfiguration message. If the base station indicates L1 measurement result reporting through the 1-bit indicator, the UE can include L1 measurement results rather than L3 measurement results in the L3MeasurementReport in operation 539 below (or, the UE can additionally include L3 measurement results together with L1 measurement results).

[0086] In operation 539, the UE can report a MeasurementReport including the plurality of measurement result values that have been recorded to the base station. In this case, each measurement result can include an L1 or L3 RSRP / RSRQ / SINR value calculated by measuring the SSB or CSI-RS transmitted through each beam at a specific point in time. More specifically, each measurement result can include a list of SSB and CSI-RS indices measured at a specific point in time, and an L1 or L3 RSRP / RSRQ / SINR measurement result corresponding to each index. When the plurality of measurement result values recorded at various points in time are included in the MeasurementReport, in order to reduce the signaling load, the UE can report only the difference (difference in value) between the result value recorded at the immediately preceding point in time and the result value recorded at the next point in time for each index, instead of reporting the absolute value of the L1 or L3 RSRP / RSRQ / SINR measurement value corresponding to each index. Alternatively, instead of reporting the absolute value of the L1 or L3 RSRP / RSRQ / SINR measurement value corresponding to each SSB / CSI-RS index, the UE can divide the representable value range into several parts, define the parts and their corresponding index values in a table format, and report only the index corresponding to the RSRP / RSRQ / SINR measurement value, thereby reducing the signaling load. In addition, when the plurality of measurement result values recorded at various points in time are included in the MeasurementReport, the UE can further include time information indicating the point in time at which the corresponding result value is recorded (i.e., the point in time at which the measurement is performed) for each measurement result. Furthermore, the UE can report the following assistance information to the base station to assist in training the beam prediction model. In operation 531, a request to report such assistance information can be made through an RRCReconfiguration procedure.

[0087] Tx and / or Rx beam shape information: Tx / Rx beam pattern information, Tx / Rx beam boresight direction (azimuth and elevation), 3 dB beam width, etc.

[0088] UE location information: user location information

[0089] UE direction / orientation information: user direction / orientation information

[0090] Tx beam usage information: Tx beam usage information

[0091] With respect to the enhanced operation procedure 530 according to the embodiment of the disclosure, a new UE capability information parameter can be newly defined. The new UE capability information parameter can indicate whether the UE is capable of understanding the new configuration information (e.g., ReportInterval (with a lower value), a logging indicator, and an L1 measurement indication) included in operation 531 and performing operations according to the configuration indication. A separate UE capability information parameter can be defined for each of the configuration information and the corresponding operation, or a UE capability information parameter can be defined for each combination of one or more configurations and operations. The procedure in which the base station and the UE exchange UE capability information can precede the above-described signaling procedure.

[0092] Figure 6 is a flowchart illustrating a procedure according to an embodiment of the disclosure in which, in order to train a model predicting beam information in a spatial domain, a base station instructs a UE in an RRC_CONNECTED state to perform measurement on all beams or a specific combination of beams and receives a result report.

[0093] Referring to Figure 6 , the base station can train a model predicting beam information in a spatial domain based on measurement information of all beams obtained at a specific time (e.g., measurement results of all DL transmission beams operated by the base station). In other words, in order to train a model for predicting beam information in a spatial domain, the base station can need measurement information of all beams 610 obtained at a specific time.

[0094] To this end, the base station can instruct a UE in an RRC_CONNECTED state to report L1 or L3 beam measurement results (more specifically, L1 or L3 RSRP / RSRQ / SINR values calculated by measuring SSBs or CSI-RSs transmitted through specific beams) through RRC signaling. To this end, the basic operation procedure 620 between the base station and the UE can be described as follows.

[0095] In operation 621, the base station can instruct the UE to perform measurement and result reporting with respect to a specific frequency, cell, and beam through an RRCReconfiguration procedure. More specifically, the base station can provide an indication of a frequency, a cell, and a beam (i.e., SSBs or CSI-RSs transmitted using a specific beam) for measurement to the UE through an RRCReconfiguration message. Detailed configuration information included in the RRCReconfiguration message can be as follows.

[0096] - ReferenceSignalConfig: Information on DL reference signals (i.e., SSB and CSI-RS transmitted using a specific beam) for beam measurement. The base station can indicate the DL reference signals that the UE is to measure for beam measurement by including the ReferenceSignalConfig information in the RRCReconfiguration message.

[0097] - reportQuantityRS-Indexes: Information indicating which values the UE should report for each reference signal (RS) index transmitted using a specific beam when reporting beam measurement results. Through the reportQuantityRS-Indexes value, the base station can instruct the UE to report RSRP, RSRQ, and / or SINR.

[0098] - maxNrofRS-IndexesToReport: Information indicating the maximum number of RS indexes for which the UE can report results for each RS type (SSB or CSI-RS) when reporting beam measurement results.

[0099] - absThreshSS-BlocksConsolidation / absThreshCSI-RS-Consolidation: Information for indicating that the UE includes only the results of beams whose ranking quantity (one of RSRP, RSRQ, or SINR) has a value equal to or greater than the absThreshSS-BlocksConsolidation value or the absThreshCSI-RS-Consolidation value in its beam measurement result report according to the RS type (SSB or CSI-RS). As a reference, the absThreshSS-BlocksConsolidation and absThreshCSI-RS-Consolidation values can be configured in units of dBm. When only one of RSRP, RSRQ, or SINR is indicated, the ranking quantity can be a value indicated by reportQuantityRS-Indexes. When multiple values are indicated in reportQuantityRS-Indexes, RSRP, RSRQ, and SINR can be given priority in this order, and the ranking quantity can be configured accordingly.

[0100] To additionally indicate to the UE that the timing of the SSB or CSI-RS transmitted through a specific beam should be measured, the base station can include measurement time configuration information (SMTC, SSB measurement timing configuration) in the RRCReconfiguration message. In addition, through the RRCReconfiguration message, the base station can indicate the report type (reportType: periodic or eventTriggered) related to reporting the measurement result and the reference signal type (rsType: SSB or CSI-RS) for which the measurement result should be reported. At this time, values such as a reporting interval (ReportInterval) and a reporting amount (reportAmount) can be additionally configured.

[0101] In operation 622, the UE can measure the SSB and CSI-RS according to the beam measurement and result reporting configuration provided by the base station in operation 621. More specifically, the UE can measure the values indicated by reportQuantityRS-Indexes (RSRP, RSRQ, SINR) of the RS included in the ReferenceSignalConfig configured by the base station in operation 621. When the result reporting type is configured as "periodic", the UE can perform the first measurement, and can report the result to the base station by including the result in the MeasurementReport (623). On the other hand, when the result reporting type is configured as "eventTriggered", the UE can measure the SSB and CSI-RS at each SMTC period, and can determine whether the configured event occurrence condition is satisfied. If the event occurrence condition is satisfied, the UE can initiate the transmission of the MeasurementReport message (623).

[0102] In operation 623, the UE can include the beam measurement results obtained according to the base station configuration described in operation 621 in the MeasurementReport and report them to the base station. Among the beam measurement result values measured in operation 622, for each RS type (SSB and CSI-RS), the UE can include the index of the best beam (i.e., the index of the RS transmitted through the best beam) in the MeasurementReport (123). In addition, when the base station has configured the maxNrofRS-IndexesToReport value and the absThreshSS-BlocksConsolidation / absThreshCSI-RS-Consolidation value in operation 621, the UE can include additional beam measurement results in the MeasurementReport (623). In this case, for each RS type (SSB and CSI-RS), the UE can include up to maxNrofRS-IndexesToReport 628 beam measurement results in the MeasurementReport (623). Among the beams measured in operation 622, only the result values of the beams whose ranking values are equal to or greater than absThreshSS-BlocksConsolidation or absThreshCSI-RS-Consolidation 627 can be included in descending order of the ranking values.

[0103] As in the basic operation flow embodiment 620, when the base station instructs the UE to perform beam measurement and receives the result values reported by the UE, only the beam measurement results 629 that satisfy the conditions configured by the base station can be reported to the base station among the entire set of beam results actually measured by the UE in the spatial domain. However, the base station can train the spatial domain beam prediction model based on the measurement information of all beams actually measured by the UE at a certain time. Therefore, in order for the base station to receive the measurement information of all beams required for training the spatial domain beam prediction model from the UE, the basic beam measurement and reporting flow 620 can be enhanced as shown in operation flow 630. In other words, the base station according to an embodiment of the disclosure can receive the measurement information of all beams required for training the spatial domain beam prediction model from the UE based on operation flow 630.

[0104] In operation 631, the base station can instruct the UE to perform measurement and result reporting on a specific frequency, cell, and beam through the RRCReconfiguration procedure. At this time, the detailed configuration information delivered to the UE by the base station through the RRCReconfiguration message is as described in operation 621. In addition, in order for the base station to receive the continuous beam measurement information required to train the time domain beam prediction model from the UE, at least some of the following information can be additionally included in the RRCReconfiguration message:

[0105] - reportAll indicator: The base station can instruct the UE to always report the measurement results of all DL RSs included in the ReferenceSignalConfig regardless of whether maxNrofRS-IndexesToReport and absThreshSS-BlocksConsolidation / absThreshCSI-RS-Consolidation are configured. For this, a new indicator (e.g., reportAll) can be introduced. When the reportAll indicator in the RRCReconfiguration message (631) received from the base station is configured as "true", the UE can perform measurement on all DL RSs included in the ReferenceSignalConfig regardless of whether maxNrofRS-IndexesToReport and absThreshSS-BlocksConsolidation / absThreshCSI-RS-Consolidation are configured, and can include the resulting measurement values in the MeasurementReport (633).

[0106] - IndexeToReportList: The base station can instruct the UE to report the measurement results of a part of the DL RS included in the ReferenceSignalConfig regardless of whether maxNrofRS-IndexesToReport and absThreshSS-BlocksConsolidation / absThreshCSI-RS-Consolidation are configured. To this end, a new field (e.g., IndexeToReportList) can be introduced. When indexesToReportList is configured in the RRCReconfiguration message (131) received from the base station, the UE can include the measurement results of all the DL RS indicated by indexesToReportList in the MeasurementReport (633) regardless of whether maxNrofRS-IndexesToReport and absThreshSS-BlocksConsolidation / absThreshCSI-RS-Consolidation are configured, and can report the MeasurementReport to the base station.

[0107] - L1 measurement indication: When the base station needs to report L1 measurement results (e.g., L1 RSRP / RSRQ / SINR) rather than L3 measurement results filtered in the time domain for training a beam prediction model, the base station can include a 1-bit indicator for instructing the UE to report the L1 measurement results in the RRCReconfiguration message. If the base station instructs the L1 measurement result reporting through the 1-bit indicator, the UE can include the L1 measurement results rather than the L3 measurement results in the L3MeasurementReport, or can additionally include the L1 measurement results together with the L3 measurement results in operation 633.

[0108] In operation 633, the UE can include multiple beam measurement result values in the MeasurementReport according to the base station configuration described in operation 631 and report them to the base station. In this case, each measurement result can include an L1 or L3 RSRP / RSRQ / SINR value calculated by measuring the SSB or CSI-RS transmitted through each beam at a specific point in time. More specifically, each measurement result can include a list of SSB and CSI-RS indices measured at a specific point in time, and an L1 or L3 RSRP / RSRQ / SINR measurement result corresponding to each index. In the case of including multiple beam measurement result values in the MeasurementReport, in order to alleviate the signaling load, the UE can also not report the absolute values of the L1 or L3 RSRP / RSRQ / SINR measurement values for each index, but only report the difference (difference in value) between the measurement value of the reference index and the measurement value of each index. Alternatively, instead of reporting the absolute values of the L1 or L3 RSRP / RSRQ / SINR measurement values corresponding to each SSB / CSI-RS index, the UE can divide the representable value range into several parts, define the parts and corresponding index values in a table format, and report only the index corresponding to the RSRP / RSRQ / SINR measurement value, thereby reducing the signaling load.

[0109] Regarding the enhanced operation procedure 630 according to the embodiment of the disclosure, a new UE capability information parameter can be defined. The new capability information parameter can indicate whether the UE is capable of understanding the new configuration information (e.g., reportAll indicator, indexeToReportList, L1 measurement indication) included in operation 631 and performing the operation according to the configuration indication. A separate UE capability information parameter can be defined for each of the configuration information and the corresponding operation, or a UE capability information parameter can be defined for each combination of one or more configurations and operations. The process of exchanging UE capability information between the base station and the UE can precede the above-described signaling procedure.

[0110] Figure 7 is a flowchart illustrating a procedure in which a base station instructs a UE to measure beams in an RRC_IDLE / RRC_INACTIVE state and receive a result report in order to train a model that predicts beam information in a spatial domain and / or a time domain according to an embodiment of the disclosure.

[0111] Reference Figure 7When the UE transitions to the RRC_IDLE and RRC_INACTIVE state, the base station can configure the UE in the RRC_CONNECTED state to perform cell and beam measurements and record result values (operation 710). After transitioning to the RRC_IDLE or RRC_INACTIVE state, the UE can perform cell and beam measurements and record result values according to the base station configuration. Thereafter, when the UE transitions to the RRC_CONNECTED state, the base station can request the UE to report the measurement results recorded at the UE in the RRC_IDLE or RRC_INACTIVE state, and the UE can report the cell and beam measurement results to the base station according to the request of the base station. The specific signaling procedure and operation between the base station and the UE for operation are as follows.

[0112] In operation 710, the base station can transmit a LoggedMeasurementConfiguration message to the UE to instruct the UE to measure cells and beams and record result values when the UE later transitions to the RRC_IDLE or RRC_INACTIVE state. In this case, the LoggedMeasurementConfiguration message can include at least some of the following information.

[0113] -LoggingDuration: This indicates the duration for which the configuration information of the LoggedMeasurementConfiguration message remains valid. The UE can start a T330 timer upon receiving the LoggedMeasurementConfiguration message from the base station, and can configure the timer value to the LoggingDuration value. Thereafter, as in operation 719, if the T330 timer expires, the UE can release all configuration information of the LoggedMeasurementConfiguration message. In addition, after a predetermined time (for example, 24 hours) elapses from the point in time at which the T330 timer expires, the UE can delete the recorded measurement results.

[0114] -loggingInterval: This indicates the time interval at which the UE performs measurements on cells or beams and periodically records result values in the RRC_IDLE or RRC_INACTIVE mode. When the UE receives the LoggedMeasurementConfiguration message from the base station, the UE can perform a recording operation at an interval (or period) indicated by the loggingInterval value included in the message.

[0115] - areaConfiguration: This indicates the range of the area in which the UE performs cell or beam measurement in the RRC_IDLE or RRC_INACTIVE mode. The base station can indicate the range of the area in which the UE is to perform measurement (i.e., areaConfiguration) in the form of a list of CellGlobalIDs, a list of TrackingAreaCodes, or a list of TrackingAreaIdentities. In addition, by including InterFreqTargetList information in the areaConfiguration information, the base station can indicate the adjacent frequencies and cells on which the UE is to perform measurement within the area in which the UE is to perform measurement.

[0116] - plmn-IdentityList: This indicates the public land mobile networks (plmn) for which the UE performs cell or beam measurement in the RRC_IDLE or RRC_INACTIVE mode. By including the plmn-IdentityList in the LoggedMeasurementConfiguration message, the base station can indicate the UE to perform measurement and logging only for the indicated plmn. In other words, the base station can indicate the UE to perform measurement and logging only when the current registered public land mobile network (RPLMN) of the UE is included in the plmn-IdentityList.

[0117] - absoluteTimeInfo: This indicates the absolute time value of the cell at the time point at which the base station transmits the LoggedMeasurementConfiguration message.

[0118] In operation 713, the base station can transmit an RRCRelease message to the UE in order to transition the UE from the RRC_CONNECTED state to the RRC_IDLE or RRC_INACTIVE state. In this case, the UE can start the measurement and logging operation according to the base station configuration described in operation 710 at the same time as the transition to the RRC_IDLE or RRC_INACTIVE state.

[0119] In operation 715, the UE can perform the measurement and logging operation at the logging interval based on the configuration provided by the base station in operation 710. More specifically, in the cell selection state (i.e., in the state in which the UE is searching for a cell to camp on), the UE can perform logging at every loggingInterval. Also, in the normal camped state (i.e., in the state in which the UE is camped on an NR cell), the UE can perform logging when the current RPLMN of the UE is included in the preconfigured plmn-IdentityList. However, in the case where the areaConfiguration is configured together with the LoggedMeasurementConfiguration described in operation 710, the UE can perform logging only when the current cell belongs to the area configured by the areaConfiguration.

[0120] When the memory of the UE becomes full while the UE performs the measurement and logging operation in the RRC_IDLE or RRC_INACTIVE state as in operation 717, the UE can stop the T330 timer and release all configuration information of the LoggedMeasurementConfiguration message. Also, the UE can delete the logged measurement results after a predetermined time (e.g., 24 hours) elapses from the time the T330 timer is stopped.

[0121] In the case where the T330 timer expires, as in operation 719, the UE can release all configuration information of the LoggedMeasurementConfiguration message. Furthermore, the UE can delete the measurement results that have been logged after a predetermined time (e.g., 24 hours) elapses from the expiration of the T330 timer.

[0122] In operation 720, the UE can transition back to the RRC_CONNECTED state through the RRC setup or RRC resume procedure. In this case, the UE can stop the measurement and logging operation being performed in the RRC_IDLE or RRC_INACTIVE state according to the LoggedMeasurementConfiguration configured in operation 710. In addition, the UE can report to the base station that it has obtained the results of the measurement and logging performed in the RRC_IDLE or RRC_INACTIVE state by including a logMeasAvailable indicator in the RRCSetupComplete and RRCResumeComplete messages in the RRC setup and RRC resume procedures, respectively. In addition, the UE can report to the base station that it has the results of the measurement and logging performed in the RRC_IDLE or RRC_INACTIVE state by including a logMeasAvailable indicator in the RRCReconfigurationComplete and RRCReestablishmentComplete messages in the RRC reconfiguration and RRC reestablishment procedures, respectively.

[0123] In operation 723, the base station can instruct the UE to report the logged measurement results by including a logMeasReportReq indicator in the UEInformationRequest message transmitted to the UE.

[0124] In operation 725, according to the indication of the base station provided in operation 723, the UE can transmit the recorded measurement results (i.e., the results of the measurement and recording performed in the RRC_IDLE or RRC_INACTIVE state in operation 715) to the base station by including them in the form of logMeasReport information in the UEInformationResponse message. The logMeasReport can include a LogMeasInfoList 730 including a plurality of LogMeasInfos recorded at respective points in time. Each LogMeasInfo can include a recorded result of a serving cell (indicated by reference numeral 733, measResultServingCell) and a recorded result of a neighboring cell (indicated by reference numeral 735, measResultNeighborCell). For a cell, the recorded result for the serving cell can include a cell measurement result based on a plurality of SSB measurements, and for a beam, can include a best SSB index (in other words, index information of an SSB transmitted through a best beam having the highest signal strength (best-ssb-Index)) and a measurement result associated therewith (in other words, L3 RSRP, RSRQ, and SINR values obtained by measuring the corresponding SSB). The recorded result of the neighboring cell can include a cell measurement result based on a plurality of SSB measurements on the cell, and can not include beam-related information.

[0125] As described above, with respect to a beam, the basic (general or regular) LogMeasInfo 730 can include only one measurement result corresponding to the best SSB index of the serving cell, and can not include any beam-related information of the neighboring cell. Accordingly, the regular measurement and recording operation in the RRC_IDLE and RRC_INACTIVE states can not be suitable for collecting data for training a beam prediction model in the time domain or the spatial domain. For reference, in order for the base station to train a beam prediction model in the time domain and / or the spatial domain, the base station can need continuous measurement results of all beams in the time domain and the spatial domain, as Figure 5 and Figure 6In addition, the base station can collect beam-related measurement information by instructing the UE in the RRC_IDLE or RRC_INACTIVE state to perform beam measurement and logging in order to obtain data for training a beam prediction model from predetermined UEs in various states. To this end, in the above-described operation for instructing the UE to perform beam measurement in the RRC_IDLE / RRC_INACTIVE state and receiving a result report, operations in operations 710 (LoggedMeasurementConfiguration) and 725 (UEInformationResponse) can be enhanced as follows.

[0126] In operation 710, when the UE performs measurement and logging in the RRC_IDLE or RRC_INACTIVE state, the base station can instruct the UE to additionally perform measurement and logging of beam-related information. To this end, at least some of the following information can be newly defined and included in the LoggedMeasurementConfiguration message.

[0127] -BeamMeasurementIndicator: A 1-bit indicator can be defined to indicate that the UE measures and logs beam-related information when performing measurement and logging in the RRC_IDLE or RRC_INACTIVE state. When data acquisition for beam prediction model training is required, the base station can include a 1-bit indicator in the LoggedMeasurementConfiguration message in order to instruct the UE to perform beam measurement and logging in the RRC_IDLE or RRC_INACTIVE state. When the 1-bit indicator is included (i.e., configured) in the LoggedMeasurementConfiguration message, the UE can perform beam measurement and logging in the RRC_IDLE or RRC_INACTIVE state, and as in operation 125, the UE can report a plurality of SSB indices and corresponding measurement results for each of the serving cell and the neighboring cells to the base station.

[0128] - reportQuantity: When the UE performs a beam measurement and logging operation in an RRC_IDLE or RRC_INACTIVE state, the base station can indicate to the UE which values are to be logged as a beam measurement result. For this, a new information (e.g., reportQuantity) can be defined to indicate at least one combination among RSRP, RSRQ, and SINR. When data acquisition for beam prediction model training is needed, the base station can instruct the UE to perform a beam measurement and logging in an RRC_IDLE or RRC_INACTIVE state. In this case, by including the reportQuantity information in the LoggedMeasurementConfiguration message and appropriately configuring the value thereof, the base station can instruct the type of measurement result value that the UE should log as a beam measurement result. Based on the reportQuantity information included in the LoggedMeasurementConfiguration message, the UE can log the measurement result value requested by the base station after performing a beam measurement in an RRC_IDLE or RRC_INACTIVE state.

[0129] - reportAll indicator: When the UE performs a beam measurement and logging operation in an RRC_IDLE or RRC_INACTIVE state, the base station can instruct the UE to perform measurement and logging on all beams (i.e., all SSB indices) transmitted by the serving cell and neighboring cells. For this, a new indicator (e.g., reportAll) can be introduced. In the case where the reportAll indicator in the loggedMeasurementConfiguration message (710) received from the base station is configured to be "true", the UE can perform measurement on all beams (in other words, all SSB indices) transmitted by the serving cell and neighboring cells, and can log the resulting measurement values.

[0130] - IndexeToReportList: When performing a beam measurement and logging operation in an RRC_IDLE or RRC_INACTIVE state, the base station can instruct the UE to report measurement results for only some beams (i.e., some SSB indices) transmitted by the serving cell and neighboring cells. For this, a new field (e.g., IndexeToReportList) can be introduced. When the IndexeToReportList is configured in the LoggedMeasurementConfiguration message (710) received from the base station, the UE can perform measurement on all SSBs indicated by the IndexeToReportList, and can log the resulting measurement values.

[0131] - L1 measurement indication: In the case where L1 measurement results (e.g., L1 RSRP / RSRQ / SINR) need to be reported for training the beam prediction model instead of L3 measurement results filtered in the time domain, the base station can include a 1-bit indicator for indicating the UE to report the L1 measurement results in the LoggedMeasurementConfiguration message. When the base station indicates the L1 measurement result reporting through the 1-bit indicator, the UE can log the L1 measurement results instead of the L3 measurement results after performing the beam measurement (or can additionally log the L1 measurement results together with the L3 measurement results).

[0132] - maxNrofIndexesToReport: This indicates the maximum number of SSB indexes whose results the UE can report when reporting the beam measurement results. When performing the beam measurement and logging operation in the RRC_IDLE or RRC_INACTIVE state, the base station can indicate the maximum number of SSB indexes whose results the UE can report for each cell. For this, a new field (e.g., maxNrofIndexesToReport) can be introduced. When maxNrofIndexesToReport is configured in the LoggedMeasurementConfiguration message (710) received from the base station, the UE can log the results of as many SSB indexes as the number indicated by maxNrofIndexesToReport for each cell.

[0133] In operation 725, when the loggedMeasurementConfiguration message received from the base station in operation 710 includes configuration information for beam-related measurement and logging, the UE can report the results of the beam-related measurement and logging performed according to the indication of the base station to the base station through a UEInformationResponse message (725). To this end, the logMeasReport information included in the UEInformationResponse message (725) can include a plurality of pieces of beam measurement information for a serving cell and a neighboring cell. More specifically, in the measurement result information 733 for the serving cell included in the logMeasReport, resultsSSB-measList can be newly defined to include beam measurement results for a plurality of SSB indexes transmitted by the serving cell. The UE can include a plurality of measured SSB indexes and corresponding measurement results (ssb-Result) in the resultsSSB-measList according to the beam-related measurement configuration (or indication) provided by the base station in operation 710. In addition, in the measurement result information 735 for the neighboring cell included in the logMeasReport, resultsSSB-measList can be newly defined to include beam measurement results for a plurality of SSB indexes transmitted by each neighboring cell. The UE can include a plurality of measured SSB indexes and corresponding measurement results (ssb-Result) for each neighboring cell in the resultsSSB-measList according to the beam-related measurement configuration (or indication) provided by the base station in operation 710.

[0134] According to embodiments of the disclosure, UE capability information parameters can be redefined with respect to the enhanced operations. A new UE capability parameter can indicate whether the UE is capable of understanding the new configuration information (e.g., BeamMeasurementIndicator, reportQuantity, reportAll indicator, indexeToReportList, L1 measurement indication, maxNrofIndexesToReport) included in operation 710 and whether the UE is capable of performing operations according to the configuration indication. A separate UE capability information parameter can be defined for each configuration information and corresponding operation, or a UE capability information parameter can be defined for each combination of one or more configurations and operations. The base station and the UE can exchange UE capability information in a procedure prior to the above-described signaling procedure.

[0135] Figure 8is a flowchart illustrating a procedure according to an embodiment of the disclosure, in which, in order to train a model that predicts beam information in a time domain, a base station instructs a UE to perform continuous beam measurement after the UE transitions from an RRC_IDLE / RRC_INACTIVE state to an RRC_CONNECTED state.

[0136] Referring to Figure 8 , in order to train a model that predicts beam information in a time domain, a base station can configure a UE to continuously measure a cell and a beam in a time domain regardless of a state of the UE when the UE is in an RRC_IDLE / RRC_INACTIVE state or an RRC_CONNECTED state. Thereafter, the base station can receive a report of a result of the continuous measurement in the time domain by the UE. The basic signaling procedure and operation 810 for this can be described as follows.

[0137] In operation 812, the base station can transmit a LoggedMeasurementConfiguration message to the UE to instruct the UE to perform measurement of a cell and a beam and log a result value when the UE later transitions to an RRC_IDLE or RRC_INACTIVE state. The configuration information of the LoggedMeasurementConfiguration message is as described with respect to operation 710 of the embodiment of Figure 7 .

[0138] In operation 813, the base station can transition the UE from an RRC_CONNECTED state to an RRC_IDLE or RRC_INACTIVE state by transmitting an RRCRelease message to the UE. In this case, the UE can start a measurement and logging operation according to the base station configuration described in operation 812 at the same time as the transition to the RRC_IDLE or RRC_INACTIVE state.

[0139] In part 814, the UE can perform a measurement and logging operation at regular intervals (loggingInterval) according to the base station configuration described in operation 812. A more specific description of the UE measurement and logging operation is the same as the description of operation 715 of the embodiment of Figure 7 .

[0140] In operation 815, the UE can transition back to an RRC_CONNECTED state through an RRC setup or RRC resume procedure. In this case, the UE can stop the measurement and logging operation performed in the RRC_IDLE or RRC_INACTIVE state according to the LoggedMeasurementConfiguration configured in operation 812.

[0141] In part 816, the UE can no longer perform the beam measurement and logging operation performed in the RRC_IDLE or RRC_INACTIVE state. Thus, the beam-related measurement information that has been periodically logged in the time domain can not be collected during this part. This means that there is a limitation in the data (i.e., continuous beam measurement information in the time domain) required by the base station to obtain the training time-domain beam prediction model.

[0142] In operation 817, the base station can instruct the UE to measure and receive a result report on a specific frequency, cell, and beam through the RRCReconfiguration procedure. More specifically, the base station can provide the UE with an indication of the frequency, cell, and beam for measurement (i.e., SSB or CSI-RS transmitted by using a specific beam) through the RRCReconfiguration message. The description of the specific configuration information included in the RRCReconfiguration message is omitted here because it is the same as described for the operation 621 of the embodiment of Figure 6

[0143] In part 818, the UE can perform cell and beam measurement in the RRC_CONNECTED state according to the base station configuration described in operation 817, and then report the measurement result to the base station through measurementReport.

[0144] According to the above-described basic signaling procedure and operation, the UE can perform the beam measurement and logging operation in the RRC_INACTIVE and RRC_IDLE state during the section 814 based on the configuration included in the LoggedMeasurementConfiguration message received in operation 812. In addition, the UE can perform the beam measurement and reporting operation in the RRC_CONNECTED state during the section 818 based on the configuration included in the RRCReconfiguration message received in operation 817. However, during the part 816, which corresponds to the time period starting from the time point 815 at which the UE transitions from the RRC_INACTIVE / RRC_IDLE state to the RRC_CONNECTED state to the time at which the UE receives the beam measurement configuration information for the RRC_CONNECTED state through the RRCReconfiguration procedure in operation 817, the UE can stop performing the beam measurement and logging operation. This indicates that there is a gap in which the UE does not perform the beam measurement in the time domain, or it can be difficult for the base station to obtain the data (i.e., continuous beam measurement information in the time domain) required to train the time-domain beam prediction model from the UE. To address this issue, an enhanced signaling procedure and operation 820 are proposed as follows.

[0145] ​In operation 822, the base station can transmit a LoggedMeasurementConfiguration message to the UE (822) to instruct the UE to perform measurements on cells and beams and log the resulting values when the UE later transitions to the RRC_IDLE or RRC_INACTIVE state. In this case, a new indicator (e.g., a ContinousMeasIndicator) can be defined to instruct the UE to continue performing the beam measurement and logging operation performed in the RRC_IDLE / RRC_INACTIVE state for a predetermined time even after the UE transitions to the RRC_CONNECTED state. When the continuous beam measurement information in the time domain is needed to train the beam prediction model in the time domain, the base station can configure the value of the indicator (ContinuousMeasIndicator) to "true" in the LoggedMeasurementConfiguration message. When the value of the indicator (ContinuousMeasIndicator) is configured to "true" in the LoggedMeasurementConfiguration message, the UE can continue to perform the beam measurement and logging operation performed in the RRC_IDLE / RRC_INACTIVE state even after transitioning to the RRC_CONNECTED state, as shown in operation 124 below. In addition, upon receiving the LoggedMeasurementConfiguration message, the UE can configure a T330 timer to a logging duration and start the timer.

[0146] In operation 823, the base station can transition the UE from the RRC_CONNECTED state to the RRC_IDLE or RRC_INACTIVE state by transmitting an RRCRelease message to the UE. In this case, upon transitioning to the RRC_IDLE or RRC_INACTIVE state, the UE can start the measurement and logging operation according to the base station configuration described in operation 822.

[0147] In operation 824, the UE can transition back to the RRC CONNECTED state through the RRC setup or RRC resume procedure. In this case, depending on the configuration included in the LoggedMeasurementConfiguration received in operation 822, the UE can continue or stop the beam measurement and logging operation after transitioning to the RRC CONNECTED state. When the value of a new indicator (e.g., ContinousMeasIndicator) for indicating the UE to continue the beam measurement and logging operation performed in the RRC_IDLE / RRC_INACTIVE state for a predetermined period of time even after transitioning to the RRC CONNECTED state is configured as "true" in the LoggedMeasurementConfiguration received in operation 822, the UE can continue the beam measurement and logging operation after transitioning to the RRC CONNECTED state. However, upon transitioning to the RRC CONNECTED state, the UE can additionally determine whether the following conditions are satisfied, and can continue the beam measurement and logging operation only when all the conditions are satisfied.

[0148] - Condition 1: The RPLMN should be included in the plmn-IdentityList. For reference, here, the plmn-IdentityList is a value configured in the LoggedMeasurementConfiguration message (822) and then stored in the VarLogMeasReport information inside the UE, as described in operation 710 of the embodiment of Figure 7 .

[0149] - Condition 2: When the areaConfiguration is configured in the LoggedMeasurementConfiguration message (822), the current primary cell or serving cell of the UE should belong to the area indicated by the areaConfiguration. On the other hand, in the case where the areaConfiguration is not configured, Condition 2 is satisfied. For reference, here, the areaConfiguration is also a value configured in the LoggedMeasurementConfiguration message (822) and then stored in the VarLogMeasReport information inside the UE, as described in operation 710 of the embodiment of Figure 7 .

[0150] When the new indicator (e.g., ContinousMeasIndicator) is not included in the LoggedMeasurementConfiguration received by the UE in operation 822 (or is included in the LoggedMeasurementConfiguration but is configured as "false"), the UE can stop the beam measurement and logging operation performed in the RRC_IDLE / RRC_INACTIVE state.

[0151] Even after the transition to the RRC_CONNECTED state in operation 824, when the UE continues to perform the beam measurement and logging operation performed in RRC_IDLE / RRC_INACTIVE, the UE can stop the beam measurement and logging operation in the following cases.

[0152] - Case 1 (operation 825): When the base station provides the UE with a beam measurement and reporting configuration (e.g., MeasConfig) for the RRC_CONNECTED state through the RRCReconfiguration procedure, the UE can stop the beam measurement and logging operation performed based on the configuration of the LoggedMeasurementConfiguration message (822). Thereafter, the UE can perform the beam measurement and reporting operation in the RRC_CONNECTED state according to the MeasConfig included in the RRCReconfiguration message. In addition, the UE can stop the T330 timer and release all configuration information of the LoggedMeasurementConfiguration message. Furthermore, after a predetermined time (e.g., 24 hours) elapses from the corresponding time point, the UE can delete the measurement results that have been logged.

[0153] - Case 2 (operation 826): When the base station requests reporting of measurement information logged by the UE in the RRC_IDLE / RRC_INACTIVE state through the UEInformationRequest message, and the UE reports the requested information through the UEInformationResponse message, the UE can stop the beam measurement and logging operation performed based on the configuration of the LoggedMeasurementConfiguration message (822). In addition, the UE can stop the T330 timer and release all configuration information of the LoggedMeasurementConfiguration message. Furthermore, after a predetermined time (e.g., 24 hours) elapses from the corresponding time point, the UE can delete the measurement results that have been logged.

[0154] - Case 3 (operation 827): When the T330 timer expires, the UE can stop the beam measurement and logging operation (822) performed based on the configuration of the LoggedMeasurementConfiguration message. In addition, the UE can release all configuration information of the LoggedMeasurementConfiguration message. Furthermore, after a predetermined time (e.g., 24 hours) elapses from the point in time at which the T330 timer expires, the UE can delete the measurement results that have been logged.

[0155] In addition, with respect to the enhanced operation, a new UE capability information parameter can be defined. The new UE capability parameter can indicate whether the UE is capable of understanding the new configuration information (e.g., ContinousMeasIndicator) included in operation 822 and performing the corresponding operation according to such configuration. A separate UE capability information parameter can be defined for each piece of configuration information and its corresponding operation, and a UE capability information parameter can be defined for each combination of one or more configurations and operations. The procedure in which the base station and the UE exchange the UE capability information can be performed before the above-described signaling procedure.

[0156] Figure 9 A UE device according to an embodiment of the disclosure is illustrated.

[0157] Reference Figure 9 The UE can include a radio frequency (RF) processor 910, a baseband processor 920, a storage 930, and a controller 940. The structure of the UE is not limited to the exemplary structure shown in Figure 9 , and the UE can include a greater or smaller number of components than those shown in Figure 9

[0158] The RF processor 910 can perform functions for transmitting and receiving signals via a wireless channel, such as band conversion and signal amplification. For example, the RF processor 910 can up-convert a baseband signal provided from the baseband processor 920 to an RF band signal and then transmit it through an antenna, and can down-convert an RF band signal received through the antenna to a baseband signal. For example, the RF processor 910 can include, but is not limited to, a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a digital-to-analog converter (DAC), an analog-to-digital converter (ADC), etc. Although only one antenna is shown in Figure 9 , the UE can include a plurality of antennas. In addition, the RF processor 910 can include a plurality of RF chains. Furthermore, the RF processor 910 can perform beamforming. For beamforming, the RF processor 910 can adjust the phase and amplitude of each signal transmitted and received through a plurality of antennas or antenna elements. Furthermore, the RF processor 910 can perform MIMO, and can receive a plurality of layers when performing the MIMO operation.​

[0159] The baseband processor 920 can perform a conversion function between a baseband signal and a bit string according to a physical layer specification of a system. For example, during data transmission, the baseband processor 920 can encode and modulate a transmitted bit string to generate complex symbols. Also, during data reception, the baseband processor 920 can demodulate and decode a baseband signal provided from the RF processor 910 to restore a received bit string. For example, when an orthogonal frequency division multiplexing (OFDM) scheme is followed, during data transmission, the baseband processor 920 can encode and modulate a transmitted bit string to generate complex symbols, can map the complex symbols to subcarriers, and can configure OFDM symbols through an inverse fast Fourier transform (IFFT) operation and a cyclic prefix (CP) insertion. Also, during data reception, the baseband processor 920 can separate a baseband signal provided from the RF processor 910 at an OFDM symbol level, can restore signals mapped to subcarriers through a fast Fourier transform (FFT) operation, and can restore a received bit string through demodulation and decoding.

[0160] The baseband processor 920 and the RF processor 910 can transmit and receive signals as described above. Accordingly, the baseband processor 920 and the RF processor 910 can be referred to as a transmitter, a receiver, a transceiver, or a communication unit. Also, at least one of the baseband processor 920 and the RF processor 910 can include a plurality of communication modules to support a plurality of different radio access technologies. Also, at least one of the baseband processor 920 and the RF processor 910 can include different communication modules to process signals in different frequency bands. For example, different radio access technologies can include a wireless LAN (e.g., IEEE 802.11), a cellular network (e.g., LTE), etc. In addition, different frequency bands can include a super high frequency (SHF) (e.g., 2NRHz) band and a millimeter wave (mmWave) (e.g., 60GHz) band. The UE can transmit / receive a signal with the base station by using the baseband processor 920 and the RF processor 910, and the signal can include control information and data.

[0161] The storage 930 can store basic programs, application programs, and data for operations of the master base station, such as configuration information. For example, the storage 930 can store basic programs, application programs, and data information, such as configuration information, for operations of the UE. In addition, the storage unit 930 can provide stored data at the request of the controller 940.

[0162] The storage 930 can include a storage medium such as a ROM, a RAM, a hard disk, a CD-ROM, and a DVD, or a combination of storage media. In addition, the storage 930 can be configured of a plurality of memories. According to an embodiment of the disclosure, the storage 930 can store a program for performing a handover method according to the disclosure.

[0163] The controller 940 can control the overall operation of the UE. For example, the controller 940 can transmit / receive a signal through the baseband processor 920 and the RF processor 910.

[0164] In addition, the controller 940 records and reads data in / from the storage 930. To this end, the controller 940 can include at least one processor. For example, the controller 940 can include a communication processor (CP) configured to perform control for communication, and an application processor (AP) configured to control an upper layer such as an application program. In addition, according to an embodiment of the disclosure, the controller 940 can include a multi-connection processor 942 configured to process a process operating in a multi-connection mode. In addition, at least one component in the UE can be implemented as a single chip.

[0165] Figure 10 A base station apparatus according to an embodiment of the disclosure is illustrated.

[0166] Figure 10 The base station in the network can be included in the network described above.

[0167] As illustrated in Figure 10 , the base station can include an RF processor 1010, a baseband processor 1020, a backhaul communication unit 1030, a storage 1040, and a controller 1050. The structure of the base station is not limited to the example structure illustrated in Figure 10 , and the structure of the base station can include a greater or smaller number of components than the structure illustrated in Figure 10 . The RF processor 1010 can perform a function for transmitting and receiving a signal via a wireless channel, such as band conversion and signal amplification. For example, the RF processor 1010 can up-convert a baseband signal provided from the baseband processor 1020 to an RF band signal, and then transmit it through an antenna, and can down-convert an RF band signal received through the antenna to a baseband signal. For example, the RF processor 1010 can include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, and an ADC. Although the RF processor 1010 is illustrated as being implemented as a single component in Figure 10Only one antenna is shown, but the RF processing unit 1010 can include a plurality of antennas. Also, the RF processor 1010 can include a plurality of RF chains. Also, the RF processor 1010 can perform beamforming. For beamforming, the RF processor 1010 can adjust the phase and amplitude of each signal transmitted and received through a plurality of antennas or antenna elements. The RF processor 1010 can transmit one or more layers to perform a downlink MIMO operation.

[0168] The baseband processor 1020 can perform a conversion function between a baseband signal and a bit string according to a physical layer specification of a system. For example, during data transmission, the baseband processor 1020 can encode and modulate a transmitted bit string to generate complex symbols. Also, during data reception, the baseband processor 1020 can demodulate and decode a baseband signal provided from the RF processor 1010 to restore a received bit string. For example, when an OFDM scheme is followed, during data transmission, the baseband processor 1020 can encode and modulate a transmitted bit string to generate complex symbols, can map the complex symbols to subcarriers, and can configure OFDM symbols through an IFFT operation and CP insertion. Also, during data reception, the baseband processor 1020 can separate a baseband signal provided from the RF processor 1010 at an OFDM symbol level, can restore signals mapped to subcarriers through an FFT operation, and can restore a received bit string through demodulation and decoding. The baseband processor 1020 and the RF processor 1010 can transmit and receive signals as described above. Accordingly, the baseband processor 1020 and the RF processor 1010 can be referred to as a transmitter, a receiver, a transceiver, a communication unit, or a wireless communication unit. The base station can transmit / receive a signal to / from a UE by using the baseband processor 1020 and the RF processor 1010, and the signal can include control information and data.

[0169] The backhaul communication unit 1030 can provide an interface for communication with other nodes in a network. For example, the backhaul communication unit 1030 can convert a bit string transmitted from a master base station to other nodes (e.g., a secondary base station or a core network) into a physical signal, and can convert a physical signal received from other nodes into a bit string.

[0170] The storage 1040 can store basic programs, application programs, and data for operation of the master base station, such as configuration information. For example, the storage 1040 can store information about bearers allocated to a connected UE, measurement results reported from the connected UE, and the like. In addition, the storage 1040 can store information used as criteria for determining whether to provide the UE with a multi-connection or to suspend a multi-connection. In addition, the storage 1040 can provide stored data at the request of the controller 1050. The storage 1040 can include a storage medium such as a ROM, a RAM, a hard disk, a CD-ROM, and a DVD, or a combination of storage media. In addition, the storage 1040 can be configured of a plurality of memories. According to an embodiment of the disclosure, the storage 1040 can store a program for performing a handover method according to the disclosure.

[0171] The controller 1050 can control the overall operation of the master base station. For example, the controller 1050 can transmit / receive a signal through the baseband processor 1020 and the RF processor 1010 or through the backhaul communication unit 1030. In addition, the controller 1050 records / reads data in / from the storage 1040. To this end, the controller 1050 can include at least one processor. In addition, according to an embodiment of the disclosure, the controller 1050 can include a multi-connection processor 1052 configured to process a process of operating in a multi-connection mode.

[0172] Figure 11 is a block diagram illustrating an example of a structure of a UE according to an embodiment of the disclosure.

[0173] As Figure 11 indicated, the UE of the disclosure can include a controller (control unit) 1130, a transceiver 1110, and a storage (memory) 1120. However, components of the UE are not limited to the above-described examples. For example, the UE can include a greater or smaller number of components than the above-described components. In addition, the controller 1130, the transceiver 1110, and the storage 1120 can be implemented in the form of a single chip. According to an embodiment, Figure 11 The transceiver 1110 of the UE can include a transmitter and a receiver. In addition, Figure 11 The controller 1130 of the UE can include at least one processor or a controller.

[0174] According to an embodiment, the controller 1130 can control a series of processes so that the UE can operate according to the above-described embodiments of the disclosure. For example, according to an embodiment of the disclosure, the controller 1130 can control the components of the UE to perform the transmission and reception methods of the UE according to whether the base station mode is the base station power saving mode or the base station normal mode. The controller 1130 can include one or more controllers, and the controller 1130 can execute programs stored in the storage 1120 to perform the transmission and reception operations of the UE in a wireless communication system employing the above-described carrier aggregation of the disclosure.

[0175] The transceiver 1110 can transmit / receive a signal with a base station. The signal transmitted / received with the base station can include control information and data. The transceiver 1110 can include an RF transmitter configured to up-convert and amplify a frequency of a transmission signal, an RF receiver configured to low-noise-amplify a received signal and down-convert a frequency thereof, etc. However, this is only an embodiment of the transceiver 1110, and the components of the transceiver 1110 are not limited to the RF transmitter and the RF receiver. In addition, the transceiver 1110 can receive a signal through a radio channel, output it to the controller 1130, and transmit a signal output from the controller 1130 through a radio channel.

[0176] According to an embodiment, the storage 1120 can store programs and data required for the operation of the UE. In addition, the storage 1120 can store control information or data included in a signal transmitted / received by the UE. The storage 1120 can include a storage medium such as a ROM, a RAM, a hard disk, a CD-ROM, and a DVD, or a combination of storage media. Furthermore, the storage 1120 can include a plurality of memories. According to an embodiment, the storage 1120 can store programs for performing the transmission and reception operations of the UE according to whether the base station mode is the base station power saving mode or the base station normal mode among the above-described embodiments of the disclosure.

[0177] Figure 12 is a block diagram illustrating an example of a structure of a base station according to an embodiment of the disclosure.

[0178] As Figure 12 illustrated, the base station of the disclosure can include a controller (control unit) 1230, a transceiver 1210, and a storage (memory) 1220. However, the components of the base station are not limited to the above-described example. For example, the base station can include a greater or smaller number of components than the above-described components. In addition, the controller 1230, the transceiver 1210, and the storage 1220 can be implemented in the form of a single chip. Figure 12 The controller 1230 of the

[0179] The controller 1230 can control a series of processes so that the base station can operate according to the above-described embodiments of the disclosure. For example, according to the embodiments of the disclosure, the controller 1230 can control the components of the base station to perform the UE scheduling method according to whether the base station mode is the base station power saving mode or the base station normal mode. The controller 1230 can include one or more controllers, and the controller 1230 can execute programs stored in the storage 1220 to perform the UE scheduling method according to whether the above-described base station mode is the base station power saving mode or the base station normal mode.

[0180] The transceiver 1210 can transmit / receive a signal with the UE. The signal transmitted / received with the UE can include control information and data. The transceiver 1210 can include an RF transmitter configured to up-convert and amplify a frequency of a transmission signal, an RF receiver configured to low-noise-amplify a received signal and down-convert a frequency thereof, etc. However, this is only an embodiment of the transceiver 1210, and the components of the transceiver 1210 are not limited to the RF transmitter and the RF receiver. In addition, the transceiver 1210 can receive a signal through a radio channel, output it to the controller 1220, and transmit a signal output from the controller 1220 through a radio channel.

[0181] According to an embodiment, the storage 1220 can store programs and data required for the operation of the base station. In addition, the storage 1220 can store control information or data included in a signal transmitted / received by the base station. The storage 1220 can include a storage medium such as a ROM, a RAM, a hard disk, a CD-ROM, and a DVD, or a combination of storage media. Furthermore, the storage 1220 can include a plurality of memories. According to an embodiment, the storage 1220 can store programs for performing the UE scheduling method according to whether the base station mode is the base station power saving mode or the base station normal mode in the above-described embodiments of the disclosure.

[0182] The method disclosed in the claims and / or the method according to the embodiments described in the specification of the disclosure can be implemented by hardware, software, or a combination of hardware and software.

[0183] When the method is implemented by software, a computer-readable storage medium for storing one or more programs (software modules) can be provided. The one or more programs stored in the computer-readable storage medium can be configured to be executed by one or more processors within an electronic device. The at least one program includes instructions that cause the electronic device to execute the methods according to various embodiments of the disclosure defined by the appended claims and / or disclosed herein.

[0184] These programs (software modules or software) can be stored in non-volatile memory including a random access memory and a flash memory, a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic disc storage device, an optical compact disc ROM (CD-ROM), a digital versatile disc (DVD), or other type of optical storage device, or a magnetic cassette. Alternatively, any combination of some or all of them can form the memory in which the program is stored. Further, a plurality of such memories can be included in the electronic device.

[0185] Further, the programs can be stored in an attachable storage device which can access the electronic device through a communication network such as the Internet, an intranet, a local area network (LAN), a wide area network (WLAN), and a storage area network (SAN), or a combination thereof. Such a storage device can access the electronic device via an external port. Further, a separate storage device on the communication network can access the portable electronic device.

[0186] In the disclosure, the term "computer program product" or "computer readable medium" is generally used to refer to a medium such as a memory, a hard disk installed in a hard disk drive, or a signal. The "computer program product" or "computer readable medium" is an element provided to the method for reporting UE capability in a wireless communication system according to the disclosure.

[0187] The machine-readable storage medium can be provided in the form of a non-transitory storage medium. Here, the term "non-transitory" only means that the storage medium is a tangible device, and does not include a signal (for example, an electromagnetic wave), but the term does not distinguish between the case where data is semi-permanently stored in the storage medium and the case where data is temporarily stored in the storage medium. As an example, the "non-transitory storage medium" can include a buffer that temporarily stores data.

[0188] According to an embodiment, the method according to various embodiments of the disclosure can 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 can be distributed in the form of a machine-readable storage medium (e.g., a compact disc read only memory (CD-ROM)) or be distributed online via an application store (e.g., a Play Store TM). If distributed online, at least a portion of the computer program product (e.g., an application) can be temporarily generated or at least temporarily stored in the memory of a server of a manufacturer, a server of an application store, or a relay server.

[0189] In the above detailed embodiments of the disclosure, elements included in the disclosure are expressed in singular or plural according to the detailed embodiments presented. However, for the convenience of description, singular or plural is appropriately selected for the presented case, and the disclosure is not limited by the elements expressed in singular or plural. Therefore, the elements expressed in plural can also include a single element, or the elements expressed in singular can also include a plurality of elements.

[0190] The embodiments of the disclosure described and illustrated in the specification and drawings are merely specific examples presented to easily explain the technical content of the disclosure and help understanding of the disclosure, and are not intended to limit the scope of the disclosure. That is, it is obvious to those skilled in the art that other variations based on the technical idea of the disclosure can be implemented. In addition, each of the above-described embodiments can be used in combination as needed. For example, a part of one embodiment of the disclosure can be combined with a part of another embodiment to operate a base station and a terminal. In addition, the embodiments of the disclosure can also be applied to other communication systems, and other variations based on the technical idea 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 the 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 configuration information related to beam management based on beam prediction from the base station; Based on the configuration information, measurements related to the beam management based on beam prediction are performed at multiple measurement time points. and A measurement report is sent to the base station, the measurement report including the results of measurements performed at the plurality of measurement time points respectively.

2. The method according to claim 1, wherein, The configuration information includes at least one of the following: information about the period in which the measurement is performed, information about the reporting interval of the measurement report, information for instructing the terminal to record the results of the measurement, information about the period in which the record is performed, and information for instructing the terminal to report the results of the measurement as the result value of a Layer 1 (L1) measurement.

3. The method according to claim 2, wherein, Information regarding the reporting interval is configured to be equal to or less than the value of the period in which the measurement is performed.

4. The method according to claim 1, wherein, The results of the measurements performed at each of the multiple measurement time points include measurement results for all beams and are used to train an artificial intelligence model for beam prediction.

5. A method performed by a base station in a wireless communication system, the method comprising: Send configuration information related to beam management based on beam prediction to the terminal; and Based on the configuration information, a measurement report is received from the terminal, including the results of measurements related to beam management based on beam prediction, wherein the measurements are performed at multiple measurement time points.

6. The method according to claim 5, wherein, The configuration information includes at least one of the following: information about the period in which the measurement is performed, information about the reporting interval of the measurement report, information for instructing the terminal to record the results of the measurement, information about the period in which the record is performed, and information for instructing the terminal to report the results of the measurement as the result value of a Layer 1 (L1) measurement.

7. The method according to claim 6, wherein, Information regarding the reporting interval is configured to be equal to or less than the value of the period in which the measurement is performed.

8. The method according to claim 5, wherein, The results of the measurements performed at each of the multiple measurement time points include measurement results for all beams and are used to train an artificial intelligence model for beam prediction.

9. A terminal in a wireless communication system, the terminal comprising: transceiver; and The controller is connected to the transceiver. The controller is configured as follows: Receive configuration information related to beam management based on beam prediction from the base station; Based on the configuration information, measurements related to the beam management based on beam prediction are performed at multiple measurement time points. and A measurement report is sent to the base station, the measurement report including the results of measurements performed at the plurality of measurement time points respectively.

10. The terminal according to claim 9, wherein, The configuration information includes at least one of the following: information about the period in which the measurement is performed, information about the reporting interval of the measurement report, information for instructing the terminal to record the results of the measurement, information about the period in which the record is performed, and information for instructing the terminal to report the results of the measurement as the result value of a Layer 1 (L1) measurement.

11. The terminal according to claim 10, wherein, Information regarding the reporting interval is configured to be equal to or less than the value of the period in which the measurement is performed.

12. The terminal according to claim 9, wherein, The results of the measurements performed at each of the multiple measurement time points include measurement results for all beams and are used to train an artificial intelligence model for beam prediction.

13. A base station in a wireless communication system, the base station comprising: transceiver; and The controller is connected to the transceiver. The controller is configured as follows: Send configuration information related to beam management based on beam prediction to the terminal; and Based on the configuration information, a measurement report is received from the terminal, including the results of measurements related to beam management based on beam prediction, wherein the measurements are performed at multiple measurement time points.

14. The base station according to claim 13, wherein, The configuration information includes at least one of the following: information about the period in which the measurement is performed, information about the reporting interval of the measurement report, information for instructing the terminal to record the results of the measurement, information about the period in which the record is performed, and information for instructing the terminal to report the results of the measurement as the result value of a Layer 1 (L1) measurement.

15. The base station according to claim 14, wherein, Information regarding the reporting interval is configured to be equal to or less than the value of the period in which the measurement is performed.

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