Method and device for beam reporting in wireless communication system

Abstract

The present disclosure is for beam reporting in a wireless communication system. An operation method performed by a terminal may comprise the steps of: detecting an event for a user equipment-initiated / event-driven beam report (UE-BR); in response to the detection of the event, transmitting control information about the beam report on a first uplink (UL) channel; and transmitting the beam report on a second UL channel corresponding to the control information.

Description

Method and device for performing beam reporting in a wireless communication system

[0001] The present disclosure relates to a wireless communication system, and more particularly, to a method and apparatus for performing beam reporting in a wireless communication system.

[0002] Communication networks (e.g., 5G communication networks, 6G communication networks, etc.) are being developed to provide improved communication services compared to existing communication networks (e.g., long term evolution (LTE), advanced LTE-A (LTE-A), etc.). 5G communication networks (e.g., new radio (NR) communication networks) can support frequency bands above 6 GHz as well as frequency bands below 6 GHz. That is, 5G communication networks can support FR1 bands and / or FR2 bands. 5G communication networks can support various communication services and scenarios compared to LTE communication networks. For example, usage scenarios of 5G communication networks can include enhanced Mobile Broadband (eMBB), Ultra Reliable Low Latency Communication (URLLC), massive Machine Type Communication (mMTC), etc.

[0003] Compared to 5G, 6G communication networks can support a wider range of communication services and scenarios. 6G communication networks can meet requirements for ultra-high performance, ultra-high bandwidth, ultra-high space, ultra-high precision, ultra-intelligence, and / or ultra-reliability. 6G communication networks can support diverse and wide frequency bands and be applied to various usage scenarios (e.g., terrestrial communications, non-terrestrial communications, sidelink communications, etc.).

[0004] Meanwhile, in 5G NR, Multiple Transmission and Reception Point (mTRP) technology refers to a technique in which a base station (e.g., gNB) communicates with terminals by utilizing multiple Transmission Reception Points (TRPs) that are physically separated. MTRP technology can solve the problem of reduced Quality-of-Service (QoS) when terminals located at the cell-edge are far from the base station, and the problem of inter-cell interference from base stations located in different cells. Furthermore, MTPR technology can play a role in providing an additional communication path, a non-line-of-sight (NLOS) path, from the base station in cases where the line-of-sight (NLOS) path from the base station is limited, such as in millimeter wave bands.

[0005] Beam management for TRP in 5G NR can be defined as a set of L1 / L2 procedures that find or maintain the optimal beam required for transmission / reception of each TRP and UE. In particular, for beam management related to analog beamforming, a transmission configuration index (TCI) has been introduced to configure the UE's reception beam for a specific channel / signal, such as PDSCH / CSI-RS / PDCCH. TCI was introduced to dynamically indicate quasi-colocation (QCL) information through downlink control information (DCI) at the base station.

[0006] On the other hand, depending on the status and circumstances of the communication channel, it is necessary to switch between the uplink signal transmission method, Single Transmission and Reception Point (sTRP) mode and Multiple Transmission and Reception Point mode. However, the method and related procedures for switching between Single Transmission and Reception Point mode and Multiple Transmission and Reception Point mode are not defined. Therefore, a method for switching between Single Transmission and Reception Point mode and Multiple Transmission and Reception Point mode is required.

[0007] Meanwhile, the technology that serves as the background for the invention is written to promote understanding of the background for the invention, and may include content that is not a prior art already known to a person with ordinary skill in the field to which the technology belongs.

[0008] The present disclosure may provide a method and device for effectively performing UE-initiated / event-driven beam reporting in a wireless communication system.

[0009] The present disclosure may provide a method and apparatus for performing signaling for beam reporting in a wireless communication system.

[0010] The present disclosure may provide a method and apparatus for transmitting control information for beam reporting in a wireless communication system.

[0011] The present disclosure may provide a method and apparatus for determining an uplink channel for control information for beam reporting in a wireless communication system.

[0012] The present disclosure may provide a method and apparatus for determining an uplink channel for beam reporting in a wireless communication system.

[0013] The present disclosure may provide a method and apparatus for determining an uplink channel based on a time offset configured by a base station in a wireless communication system.

[0014] The present disclosure may provide a method and device for determining whether to stop beam reporting based on a time offset configured by a base station in a wireless communication system.

[0015] The present disclosure may provide a method and apparatus for multiplexing control information and uplink data for beam reporting in a wireless communication system.

[0016] The present disclosure may provide a method and apparatus for supporting cross carrier beam reporting in a wireless communication system.

[0017] The technical objectives to be achieved in the present disclosure are not limited to those mentioned above, and other technical tasks not mentioned can be considered by a person having ordinary skill in the technical field to which the technical configuration of the present disclosure is applied from the embodiments of the present disclosure described below.

[0018] According to one embodiment of the present disclosure, a method of operating a terminal in a wireless communication system includes the steps of detecting an event for a user equipment-initiated / event-driven beam report (UE-BR), transmitting control information for a beam report in a first uplink (UL) channel in response to detection of the event, and transmitting the beam report in a second UL channel corresponding to the control information, wherein the control information for the beam report includes a request for resource allocation for the beam report or a notification for transmission of the beam report, and the first UL channel and the second UL channel can be used based on at least one time offset configured by a base station.

[0019] According to one embodiment of the present disclosure, a method of operating a base station in a wireless communication system includes the steps of receiving control information for a beam report according to detection of an event for a UE-BR (user equipment-initiated / event-driven beam report) of a terminal in a first uplink (UL) channel, and receiving the beam report in a second UL channel corresponding to the control information, wherein the control information for the beam report includes a request for resource allocation for the beam report or a notification for transmission of the beam report, and the first UL channel and the second UL channel can be used based on at least one time offset configured by the base station.

[0020] According to one embodiment of the present disclosure, in a wireless communication system, a terminal includes at least one transceiver, at least one processor, and at least one memory operably connected to the at least one processor and storing instructions that, when executed by the processor, control the terminal to perform operations, the operations including: detecting an event for a user equipment-initiated / event-driven beam report (UE-BR); transmitting, in response to detection of the event, control information for a beam report on a first uplink (UL) channel; and transmitting the beam report on a second UL channel corresponding to the control information, wherein the control information for the beam report includes a request for resource allocation for the beam report or a notification for transmission of the beam report, and wherein the first UL channel and the second UL channel can be used based on at least one time offset configured by a base station.

[0021] According to one embodiment of the present disclosure, in a wireless communication system, a base station includes at least one transceiver, at least one processor, and at least one memory operably connected to the at least one processor and storing instructions that, when executed by the processor, control the base station to perform operations, the operations including: receiving control information for a beam report according to detection of an event for a user equipment-initiated / event-driven beam report (UE-BR) of a terminal on a first uplink (UL) channel; and receiving the beam report on a second UL channel corresponding to the control information, wherein the control information for the beam report includes a request for resource allocation for the beam report or a notification for transmission of the beam report, and wherein the first UL channel and the second UL channel can be used based on at least one time offset configured by the base station.

[0022] The proposed technology enables efficient performance of UE-initiated / event-driven beam reporting in wireless communication systems.

[0023] The effects that can be obtained from the embodiments of the present disclosure are not limited to the effects mentioned above, and other effects not mentioned can be clearly derived and understood by those skilled in the art to which the technical configuration of the present disclosure is applied, from the description of the embodiments of the present disclosure below. In other words, unintended effects resulting from implementing the configuration described in the present disclosure can also be derived from the embodiments of the present disclosure by those skilled in the art.

[0024] FIG. 1 illustrates a communication system according to an embodiment of the present disclosure.

[0025] FIG. 2 illustrates a block diagram of a communication node according to an embodiment of the present disclosure.

[0026] FIG. 3 illustrates a block diagram of a wireless device according to an embodiment of the present disclosure.

[0027] FIGS. 4A and 4B illustrate block diagrams of a transmission path and a reception path of a communication node according to an embodiment of the present disclosure.

[0028] FIG. 5 illustrates an example of a system frame in a wireless communication system according to an embodiment of the present disclosure.

[0029] FIG. 6 illustrates an example of a subframe in a wireless communication system according to an embodiment of the present disclosure.

[0030] FIG. 7 illustrates an example of a slot in a wireless communication system according to an embodiment of the present disclosure.

[0031] FIG. 8 illustrates the structure of time-frequency resources in a wireless communication system according to an embodiment of the present disclosure.

[0032] FIG. 9 illustrates an example of a quasi-co location (QCL) relationship between reference signals in a wireless communication system according to an embodiment of the present disclosure.

[0033] FIG. 10 illustrates the concept of a unified transmission configuration indicator (TCI) state in a wireless communication system according to an embodiment of the present disclosure.

[0034] FIG. 11 illustrates an example of a process for transmitting a TCI state in a multi-transmission reception point (M-TRP) structure in a wireless communication system according to an embodiment of the present disclosure.

[0035] FIG. 12 illustrates a first example of a procedure for a user equipment-initiated / event-driven beam report (UE-BR) in a wireless communication system according to one embodiment of the present disclosure.

[0036] FIG. 13 illustrates a second example of a procedure for UE-BR in a wireless communication system according to one embodiment of the present disclosure.

[0037] FIG. 14 illustrates an example of a procedure for transmitting a beam report in a wireless communication system according to one embodiment of the present disclosure.

[0038] FIG. 15 illustrates an example of a procedure for receiving a beam report in a wireless communication system according to one embodiment of the present disclosure.

[0039] FIG. 16 illustrates an example of a control information transmission procedure for beam reporting in a wireless communication system according to one embodiment of the present disclosure.

[0040] FIG. 17 illustrates an example of a control information transmission procedure for beam reporting in a wireless communication system according to one embodiment of the present disclosure.

[0041] FIG. 18 illustrates an example of a beam report transmission procedure in a wireless communication system according to one embodiment of the present disclosure.

[0042] FIG. 19 illustrates an example of a procedure for transmitting a cross carrier beam report in a wireless communication system according to one embodiment of the present disclosure.

[0043] FIG. 20 illustrates an example of a procedure for transmitting a cross carrier beam report in a wireless communication system according to one embodiment of the present disclosure.

[0044] FIG. 21 illustrates a third example of a procedure for UE-BR in a wireless communication system according to one embodiment of the present disclosure.

[0045] FIG. 22 illustrates an example of a procedure for transmitting a beam report in a wireless communication system according to one embodiment of the present disclosure.

[0046] This disclosure may be subject to various modifications and various embodiments. Specific embodiments are illustrated and described in detail in the drawings. However, this is not intended to limit the disclosure to specific embodiments, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the disclosure.

[0047] While terms such as "first" and "second" may be used to describe various components, these components should not be limited by these terms. These terms are used solely to distinguish one component from another. For example, without departing from the scope of the present disclosure, a first component could be referred to as a "second component," and similarly, a second component could also be referred to as a "first component." The term "and / or" may refer to a combination of multiple related items described herein or to any of multiple related items described herein.

[0048] In the present disclosure, “at least one of A and B” may mean “at least one of A or B” or “at least one of combinations of one or more of A and B.” Additionally, in the present disclosure, “at least one of A and B” may mean “at least one of A or B” or “at least one of combinations of one or more of A and B.”

[0049] In the present disclosure, (re)transmission may mean “transmission,” “retransmission,” or “transmission and retransmission,” (re)setting may mean “setting,” “resetting,” or “setting and resetting,” (re)connection may mean “connection,” “reconnection,” or “connection and reconnection,” and (re)connection may mean “connection,” “reconnection,” or “connection and reconnection.”

[0050] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components intervening. Conversely, when a component is referred to as being "directly connected" or "connected" to another component, it should be understood that there are no other components intervening.

[0051] The terminology used in this disclosure is only used to describe specific embodiments and is not intended to limit the present disclosure. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this disclosure, it should be understood that the terms "comprises" or "has" indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0052] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which this disclosure pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and shall not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0053] Hereinafter, preferred embodiments of the present disclosure will be described in more detail with reference to the attached drawings. In order to facilitate an overall understanding in describing the present disclosure, the same reference numerals will be used for identical components in the drawings, and redundant descriptions of identical components will be omitted. In addition to the embodiments explicitly described in the present disclosure, operations may be performed according to combinations of embodiments, extensions of embodiments, and / or modifications of embodiments. The performance of some operations may be omitted, and the order of operation may be changed.

[0054] In an embodiment, even if a method (e.g., transmitting or receiving a signal) performed by a first communication node among communication nodes is described, a corresponding second communication node can perform a method (e.g., receiving or transmitting a signal) corresponding to the method performed by the first communication node. That is, if an operation of a UE (user equipment) is described, a corresponding base station can perform an operation corresponding to the operation of the UE. Conversely, if an operation of a base station is described, a corresponding UE can perform an operation corresponding to the operation of the base station.

[0055] A base station may be referred to as a NodeB, an evolved NodeB, a gNodeB (next generation node B), a gNB, a device, an apparatus, a node, a communication node, a BTS (base transceiver station), a RRH (radio remote head), a TRP (transmission reception point), a RU (radio unit), an RSU (road side unit), a radio transceiver, an access point, an access node, etc. A UE may be referred to as a terminal, a device, an apparatus, a node, a communication node, an end node, an access terminal, a mobile terminal, a station, a subscriber station, a mobile station, a portable subscriber station, an OBU (on-broad unit), etc.

[0056] In the present disclosure, signaling may be at least one of upper layer signaling, MAC signaling, or PHY (physical) signaling. A message used for upper layer signaling may be referred to as an "upper layer message" or an "upper layer signaling message." A message used for MAC signaling may be referred to as a "MAC message" or a "MAC signaling message." A message used for PHY signaling may be referred to as a "PHY message" or a "PHY signaling message." Upper layer signaling may refer to a transmission and reception operation of system information (e.g., a master information block (MIB), a system information block (SIB)) and / or a radio resource control (RRC) message. MAC signaling may refer to a transmission and reception operation of a MAC control element (CE). PHY signaling may refer to a transmission and reception operation of control information (e.g., downlink control information (DCI), uplink control information (UCI), sidelink control information (SCI)).

[0057] In the present disclosure, “an operation (e.g., a transmission operation) is set” may mean that “setting information for the operation (e.g., an information element, a parameter)” and / or “information instructing the performance of the operation” is signaled. “An information element (e.g., a parameter) is set” may mean that the information element is signaled. In the present disclosure, “a signal and / or a channel” may mean a signal, a channel, or “a signal and a channel,” and a signal may be used to mean “a signal and / or a channel.”

[0058] The communication network to which the embodiment is applied is not limited to what is described below, and the embodiment may be applied to various communication networks (e.g., 4G communication networks, 5G communication networks, and / or 6G communication networks). Here, the communication network may be used in the same sense as the communication system.

[0059] FIG. 1 illustrates a communication system according to an embodiment of the present disclosure.

[0060] Referring to FIG. 1, the communication system (100) may include a plurality of communication nodes (110-1, 110-2, 110-3, 120-1, 120-2, 130-1, 130-2, 130-3, 130-4, 130-5, 130-6). In addition, the communication system (100) may further include a core network (e.g., a serving-gateway (S-GW), a packet data network (PDN)-gateway (P-GW), a mobility management entity (MME)). If the communication system (100) is a 5G communication system (e.g., a new radio (NR) system), the core network may include an access and mobility management function (AMF), a user plane function (UPF), a session management function (SMF), etc.

[0061] A plurality of communication nodes (110 to 130) can support a communication protocol (e.g., LTE communication protocol, LTE-A communication protocol, NR communication protocol, etc.) specified in the 3GPP (3rd generation partnership project) standard. The plurality of communication nodes (110 to 130) may support CDMA (code division multiple access) technology, WCDMA (wideband CDMA) technology, TDMA (time division multiple access) technology, FDMA (frequency division multiple access) technology, OFDM (orthogonal frequency division multiplexing) technology, Filtered OFDM technology, CP (cyclic prefix)-OFDM technology, DFT-s-OFDM (discrete Fourier transform-spread-OFDM) technology, OFDMA (orthogonal frequency division multiple access) technology, SC (single carrier)-FDMA technology, NOMA (non-orthogonal multiple access) technology, GFDM (generalized frequency division multiplexing) technology, FBMC (filter bank multi-carrier) technology, UFMC (universal filtered multi-carrier) technology, SDMA (space division multiple access) technology, etc. Each of the plurality of communication nodes may have the following structure.

[0062] FIG. 2 illustrates a block diagram of a communication node according to an embodiment of the present disclosure. The structure illustrated in FIG. 2 may be understood as the structure of at least a portion of a communication node, a base station, or a core network entity. The wireless device (200) illustrated in FIG. 2 may be a mobile terminal such as a smartphone, tablet PC, or wearable device, but is not limited thereto.

[0063] Referring to FIG. 2, the wireless device (200) may include at least one control unit (210), at least one memory (220), at least one power supply unit (230), at least one transceiver unit (240), at least one input unit (250), at least one output unit (260), and / or at least one antenna (270).

[0064] The control unit (210) can control the memory (220) and / or the transceiver unit (240), and can be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in the present disclosure. The memory (220) can be connected to the control unit (210) and can store various information related to the operation of the control unit (210). For example, the memory (220) can perform some or all of the controls controlled by the control unit (210), or store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in the present disclosure. The configuration of the memory is not limited in a specific manner. For example, it can be configured as at least one of a read-only memory (ROM) and a random access memory (RAM).

[0065] At least one control unit (210) may be referred to as a controller, a microcontroller, a microprocessor, or a microcomputer. The descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in the present disclosure may be implemented using firmware or software in the form of codes, instructions, and / or a set of instructions. Here, the firmware or software may execute another program stored in a memory (220), such as an OS. The control unit (210) may be implemented to support beamforming or directional routing operations in which signals from at least one antenna (270) are weighted differently to effectively steer signals outgoing in a desired direction.

[0066] Additionally, at least one control unit (210) may be coupled to a backhaul or network interface. The wireless device (200) may communicate with other wireless devices through the backhaul or network interface. The control unit (210) may include at least one processor. The processor may refer to a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which methods according to embodiments of the present disclosure are performed.

[0067] At least one transceiver (240) may be connected to the control unit (210) and may transmit and / or receive a wireless signal via at least one antenna (270). The transceiver (240) may include a transmitter and / or a receiver. The at least one transceiver (240) may transmit user data, control information, wireless signals / channels, etc. mentioned in the methods and / or operation flowcharts of the present disclosure to at least one other device. For example, the at least one transceiver (240) may be connected to at least one control unit (210) and may transmit and receive wireless signals. In addition, the at least one control unit (210) may control the at least one transceiver (240) to transmit user data, control information, or a wireless signal to at least one other device. The at least one transmitter (240) may receive a signal transmitted by another wireless device from at least one antenna (270). Additionally, at least one transceiver (24) may downconvert or upconvert the received signal to generate a baseband signal. At least one antenna (270) may be a plurality of physical antennas or a plurality of logical antennas (e.g., antenna ports).

[0068] The input unit (250) can obtain information such as user input, video, and audio, and can include various input means such as various mechanical / electronic input means, cameras, and microphones. The output unit (260) is for providing information to users by generating output related to sight, hearing, or touch, and can include a display, a speaker, a vibration module, and the like. The wireless device (200) supplies power through the power supply unit (230), and the power supply unit (230) can include a wired / wireless charging circuit, a battery, and the like.

[0069] Referring again to FIG. 1, the communication system (100) may include a plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2) and a plurality of terminals (130-1, 130-2, 130-3, 130-4, 130-5, 130-6). Each of the first base station (110-1), the second base station (110-2), and the third base station (110-3) may form a macro cell. Each of the fourth base station (120-1) and the fifth base station (120-2) may form a small cell. The fourth base station (120-1), the third terminal (130-3), and the fourth terminal (130-4) may be within the cell coverage of the first base station (110-1). The second terminal (130-2), the fourth terminal (130-4), and the fifth terminal (130-5) may be within the cell coverage of the second base station (110-2). The fifth base station (120-2), the fourth terminal (130-4), the fifth terminal (130-5), and the sixth terminal (130-6) may be within the cell coverage of the third base station (110-3). The first terminal (130-1) may be within the cell coverage of the fourth base station (120-1). The sixth terminal (130-6) may be within the cell coverage of the fifth base station (120-2).

[0070] Here, each of the plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2) may be referred to as a NodeB (NB), an evolved NodeB (eNB), a gNB, an advanced base station (ABS), a high reliability-base station (HR-BS), a base transceiver station (BTS), a radio base station, a radio transceiver, an access point, an access node, a radio access station (RAS), a mobile multihop relay-base station (MMR-BS), a relay station (RS), an advanced relay station (ARS), a high reliability-relay station (HR-RS), a home NodeB (HNB), a home eNodeB (HeNB), a road side unit (RSU), a radio remote head (RRH), a transmission point (TP), a transmission and reception point (TRP), etc.

[0071] Each of the plurality of terminals (130-1, 130-2, 130-3, 130-4, 130-5, 130-6) may be referred to as a user equipment (UE), terminal equipment (TE), advanced mobile station (AMS), high reliability-mobile station (HR-MS), terminal, access terminal, mobile terminal, station, subscriber station, mobile station, portable subscriber station, node, device, on board unit (OBU), etc.

[0072] Meanwhile, each of the plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2) may operate in a different frequency band or may operate in the same frequency band. Each of the plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2) may be connected to each other via an ideal backhaul link or a non-ideal backhaul link, and may exchange information with each other via the ideal backhaul link or the non-ideal backhaul link. Each of the plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2) may be connected to the core network via the ideal backhaul link or the non-ideal backhaul link. Each of the plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2) can transmit a signal received from the core network to the corresponding terminal (130-1, 130-2, 130-3, 130-4, 130-5, 130-6), and can transmit a signal received from the corresponding terminal (130-1, 130-2, 130-3, 130-4, 130-5, 130-6) to the core network.

[0073] Additionally, each of the plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2) may support MIMO transmission (e.g., single user (SU)-MIMO, multi user (MU)-MIMO, massive MIMO, etc.), coordinated multipoint (CoMP) transmission, carrier aggregation (CA) transmission, transmission in an unlicensed band, sidelink communication (e.g., device to device communication (D2D), proximity services (ProSe)), Internet of Things (IoT) communication, dual connectivity (DC), etc. Here, each of the plurality of terminals (130-1, 130-2, 130-3, 130-4, 130-5, 130-6) can perform an operation corresponding to the base station (110-1, 110-2, 110-3, 120-1, 120-2) and an operation supported by the base station (110-1, 110-2, 110-3, 120-1, 120-2). For example, the second base station (110-2) can transmit a signal to the fourth terminal (130-4) based on the SU-MIMO scheme, and the fourth terminal (130-4) can receive a signal from the second base station (110-2) by the SU-MIMO scheme. Alternatively, the second base station (110-2) can transmit signals to the fourth terminal (130-4) and the fifth terminal (130-5) based on the MU-MIMO method, and each of the fourth terminal (130-4) and the fifth terminal (130-5) can receive signals from the second base station (110-2) based on the MU-MIMO method.

[0074] Each of the first base station (110-1), the second base station (110-2), and the third base station (110-3) can transmit a signal to the fourth terminal (130-4) based on the CoMP scheme, and the fourth terminal (130-4) can receive a signal from the first base station (110-1), the second base station (110-2), and the third base station (110-3) based on the CoMP scheme. Each of the plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2) can transmit and receive a signal with terminals (130-1, 130-2, 130-3, 130-4, 130-5, 130-6) within its cell coverage based on the CA scheme. Each of the first base station (110-1), the second base station (110-2), and the third base station (110-3) can control sidelink communication between the fourth terminal (130-4) and the fifth terminal (130-5), and each of the fourth terminal (130-4) and the fifth terminal (130-5) can perform sidelink communication under the control of the second base station (110-2) and the third base station (110-3), respectively.

[0075] Meanwhile, a more detailed example of the structure of the control unit (210) and / or the transceiver unit (240) is shown in FIG. 3. FIG. 3 illustrates a block diagram of a wireless device according to an embodiment of the present disclosure. FIG. 3 illustrates the structure of a first wireless device (300a) and a second wireless device (300b) that transmit and / or receive signals. In FIG. 3, each of the first wireless device (300a) and the second wireless device (300b) may be a base station or a UE.

[0076] Referring to FIG. 3, a first wireless device (300a) can transmit a signal to a second wireless device (300b). A transmission processor (311) included in the first wireless device (300a) can receive data (e.g., a data unit) from a data source (310). The transmission processor (311) can receive control information from a controller (316). The control information can include at least one of system information, RRC configuration information (e.g., information set by RRC signaling), MAC control information (e.g., MAC CE), or PHY control information (e.g., DCI, SCI).

[0077] The transmitting processor (311) may perform a processing operation on data (e.g., an encoding operation, a symbol mapping operation, etc.) to generate data symbol(s). The transmitting processor (311) may perform a processing operation on control information (e.g., an encoding operation, a symbol mapping operation, etc.) to generate control symbol(s). In addition, the transmitting processor (311) may generate synchronization / reference symbol(s) for a synchronization signal and / or a reference signal.

[0078] The Tx MIMO processor (312) may perform a spatial processing operation (e.g., a precoding operation) on data symbol(s), control symbol(s), and / or synchronization / reference symbol(s). The output (e.g., a symbol stream) of the Tx MIMO processor (312) may be provided to modulators (MODs) included in the transceivers (313a to 313t). The modulators (MODs) may perform a processing operation on the symbol stream to generate modulation symbols, and may perform an additional processing operation (e.g., an analog conversion operation, an amplification operation, a filtering operation, an upconversion operation) on the modulation symbols to generate signals. The signals generated by the modulators (MODs) of the transceivers (313a to 313t) may be transmitted via the antennas (314a to 314t).

[0079] Signals transmitted by the first wireless device (300a) may be received by the antennas (364a to 364r) of the second wireless device (300b). The signals received by the antennas (364a to 364r) may be provided to demodulators (DEMODs) included in the transceivers (363a to 363r). The demodulator (DEMOD) may perform a processing operation (e.g., a filtering operation, an amplification operation, a downconversion operation, a digital conversion operation) on the signal to obtain samples. The demodulator (DEMOD) may perform an additional processing operation on the samples to obtain symbols. The MIMO detector (362) may perform a MIMO detection operation on the symbols. The receiving processor (361) may perform a processing operation (e.g., a deinterleaving operation, a decoding operation) on the symbols. The output of the receiving processor (361) may be provided to a data sink (360) and a controller (366). For example, data may be provided to the data sink (360), and control information may be provided to the controller (366).

[0080] Meanwhile, the second wireless device (300b) can transmit a signal to the first wireless device (300a). The transmitting processor (368) included in the second wireless device (300b) can receive data (e.g., data units) from a data source (367) and perform a processing operation on the data to generate data symbol(s). The transmitting processor (368) can receive control information from the controller (366) and perform a processing operation on the control information to generate control symbol(s). In addition, the transmitting processor (368) can perform a processing operation on a reference signal to generate reference symbol(s).

[0081] The Tx MIMO processor (369) may perform spatial processing operations (e.g., precoding operations) on data symbol(s), control symbol(s), and / or reference symbol(s). The output (e.g., symbol stream) of the Tx MIMO processor (369) may be provided to modulators (MODs) included in the transceivers (363a to 363t). The modulators (MODs) may perform processing operations on the symbol streams to generate modulation symbols, and may perform additional processing operations (e.g., analog conversion operations, amplification operations, filtering operations, upconversion operations) on the modulation symbols to generate signals. The signals generated by the modulators (MODs) of the transceivers (363a to 363t) may be transmitted via the antennas (364a to 364t).

[0082] Signals transmitted by the second wireless device (300b) may be received by the antennas (314a to 314r) of the first wireless device (300a). The signals received by the antennas (314a to 314r) may be provided to demodulators (DEMODs) included in the transceivers (313a to 313r). The demodulator (DEMOD) may perform a processing operation (e.g., a filtering operation, an amplification operation, a downconversion operation, a digital conversion operation) on the signal to obtain samples. The demodulator (DEMOD) may perform an additional processing operation on the samples to obtain symbols. The MIMO detector (320) may perform a MIMO detection operation on the symbols. The receiving processor (319) may perform a processing operation (e.g., a deinterleaving operation, a decoding operation) on the symbols. The output of the receiving processor (319) may be provided to a data sink (318) and a controller (316). For example, data may be provided to the data sink (318) and control information may be provided to the controller (316).

[0083] Memories (315 and 365) can store data, control information, and / or program code. Scheduler (317) can perform scheduling operations for communication. The processors (311, 312, 319, 361, 368, 369) and controllers (316, 366) illustrated in FIG. 3 may be the processor (210) illustrated in FIG. 2 and may be used to perform the methods described in the present disclosure.

[0084] FIGS. 4A and 4B illustrate block diagrams of a transmission path and a reception path of a communication node according to an embodiment of the present disclosure.

[0085] Referring to FIGS. 4A and 4B, a transmission path (410) may be implemented in a communication node that transmits a signal, and a reception path (420) may be implemented in a communication node that receives a signal. The transmission path (410) may include a channel coding and modulation block (411), an S-to-P (serial-to-parallel) block (512), an N IFFT (Inverse Fast Fourier Transform) block (413), a P-to-S (parallel-to-serial) block (414), a CP (cyclic prefix) addition block (415), and an UC (up-converter) (UC) (416). The receiving path (420) may include a DC (down-converter) (421), a CP removal block (422), an S-to-P block (423), an N FFT block (424), a P-to-S block (425), and a channel decoding and demodulation block (426). Here, N may be a natural number.

[0086] In the transmission path (410), information bits may be input to a channel coding and modulation block (411). The channel coding and modulation block (411) may perform a coding operation (e.g., a low-density parity check (LDPC) coding operation, a polar coding operation, etc.) and a modulation operation (e.g., a quadrature phase shift keying (QPSK), a quadrature amplitude modulation (QAM), etc.) on the information bits. The output of the channel coding and modulation block (411) may be a sequence of modulation symbols.

[0087] The S-to-P block (412) can convert modulation symbols in the frequency domain into parallel symbol streams to generate N parallel symbol streams. N can be an IFFT size or an FFT size. The N IFFT block (413) can perform an IFFT operation on the N parallel symbol streams to generate signals in the time domain. The P-to-S block (414) can convert the output (e.g., parallel signals) of the N IFFT block (413) into a serial signal to generate a serial signal.

[0088] The CP addition block (415) can insert a CP into a signal. The UC (416) can up-convert the frequency of the output of the CP addition block (415) to an RF (radio frequency) frequency. Additionally, the output of the CP addition block (415) can be filtered at the baseband before up-conversion.

[0089] A signal transmitted from a transmission path (410) may be input to a reception path (420). An operation in the reception path (420) may be the reverse operation of the operation in the transmission path (410). A DC (421) may down-convert the frequency of the received signal to a baseband frequency. A CP removal block (422) may remove a CP from a signal. The output of the CP removal block (422) may be a serial signal. An S-to-P block (423) may convert the serial signal into parallel signals. An N FFT block (424) may perform an FFT algorithm to generate N parallel signals. A P-to-S block (425) may convert the parallel signals into a sequence of modulation symbols. A channel decoding and demodulation block (426) may perform a demodulation operation on the modulation symbols and perform a decoding operation on the result of the demodulation operation to restore data.

[0090] In FIGS. 4A and 4B , Discrete Fourier Transform (DFT) and Inverse DFT (IDFT) may be used instead of FFT and IFFT. Each of the blocks (e.g., components) in FIGS. 4A and 4B may be implemented by at least one of hardware, software, or firmware. For example, some of the blocks in FIGS. 4A and 4B may be implemented by software, and the remaining blocks may be implemented by hardware or a “combination of hardware and software.” In FIGS. 4A and 4B , a block may be subdivided into multiple blocks, multiple blocks may be integrated into a single block, some blocks may be omitted, and blocks supporting other functions may be added.

[0091] FIG. 5 illustrates an example of a system frame in a wireless communication system according to an embodiment of the present disclosure.

[0092] Referring to Figure 5, time resources in a communication system can be divided into frame units. For example, system frames can be set consecutively in the time domain of the communication system. The length of a system frame can be 10 ms (milliseconds). The system frame number (SFN) can be set from #0 to #1023. In this case, 1024 system frames can be repeated in the time domain of the communication system. For example, the SFN of the system frame after system frame #1023 can be #0.

[0093] A system frame may include two half frames. A half frame may be 5 ms long. A half frame located at the beginning of the system frame may be referred to as "half frame #0," and a half frame located at the end of the system frame may be referred to as "half frame #1." A system frame may include 10 subframes. A subframe may be 1 ms long. The 10 subframes within a system frame may be referred to as "subframes #0-9."

[0094] FIG. 6 illustrates an example of a subframe in a wireless communication system according to an embodiment of the present disclosure.

[0095] Referring to Fig. 6, one subframe can include n slots, where n can be a natural number. Therefore, one subframe can be composed of one or more slots.

[0096] FIG. 7 illustrates an example of a slot in a wireless communication system according to an embodiment of the present disclosure.

[0097] Referring to Figure 7, a single slot may include one or more symbols. A single slot illustrated in Figure 7 may include 14 symbols. The length of a slot may vary depending on the number and length of symbols contained in the slot. Alternatively, the length of a slot may vary depending on the numerology.

[0098] In a communication system, the numerology applied to physical signals and channels may be variable. The numerology may be variable to meet various technical requirements of the communication system. In a communication system applying CP (cyclic prefix)-based OFDM waveform technology, the numerology may include subcarrier spacing and CP length (or CP type). Table 1 may be an embodiment of a method for configuring a numerology for a CP-OFDM-based communication system. At least some of the numerologies in Table 1 may be supported depending on the frequency band in which the communication system operates. In addition, the communication system may additionally support numerologies not listed in [Table 1].

[0099] Subcarrier spacing 15kHz 30kHz 60kHz 120kHz 240kHz 480kHz OFDM symbol length [μs] 66.733.316.78.34.22.1 CP length [us] 4.762.381.190.600.300.151 Number of OFDM symbols in ms 142856112224448

[0100] When the subcarrier spacing is 15 kHz (e.g., μ=0), the slot length can be 1 ms. In this case, one system frame can contain 10 slots. When the subcarrier spacing is 30 kHz (e.g., μ=1), the slot length can be 0.5 ms. In this case, one system frame can contain 20 slots.

[0101] When the subcarrier spacing is 60 kHz (e.g., μ=2), the slot length can be 0.25 ms. In this case, one system frame can contain 40 slots. When the subcarrier spacing is 120 kHz (e.g., μ=3), the slot length can be 0.125 ms. In this case, one system frame can contain 80 slots. When the subcarrier spacing is 240 kHz (e.g., μ=4), the slot length can be 0.0625 ms. In this case, one system frame can contain 160 slots.

[0102] A symbol may be configured as a downlink (DL) symbol, a flexible (FL) symbol, or an uplink (UL) symbol. A slot consisting of only DL symbols may be referred to as a "DL slot," a slot consisting of only FL symbols may be referred to as an "FL slot," and a slot consisting of only UL symbols may be referred to as a "UL slot."

[0103] The slot format can be semi-statically configured by higher layer signaling (e.g., RRC signaling). Information indicating the semi-static slot format can be included in the system information, and the semi-static slot format can be configured cell-specifically. In addition, the semi-static slot format can be additionally configured for each terminal through terminal-specific higher layer signaling (e.g., RRC signaling). The flexible symbol of the cell-specifically configured slot format can be overridden to a downlink symbol or an uplink symbol by terminal-specific higher layer signaling. In addition, the slot format can be dynamically indicated by physical layer signaling (e.g., a slot format indicator (SFI) included in DCI). The semi-statically configured slot format can be overridden by a dynamically indicated slot format. For example, the semi-statically configured flexible symbol can be overridden to a downlink symbol or an uplink symbol by the SFI.

[0104] The reference signal may be a channel state information-reference signal (CSI-RS), a sounding reference signal (SRS), a demodulation-reference signal (DM-RS), a phase tracking-reference signal (PT-RS), etc. The channel may be a physical broadcast channel (PBCH), a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), a physical sidelink control channel (PSCCH), a physical sidelink shared channel (PSSCH), etc. In the present disclosure, the control channel may mean a PDCCH, a PUCCH, or a PSCCH, and the data channel may mean a PDSCH, a PUSCH, or a PSSCH.

[0105] FIG. 8 illustrates the structure of time-frequency resources in a wireless communication system according to an embodiment of the present disclosure.

[0106] Referring to FIG. 8, a resource consisting of one symbol (e.g., an OFDM symbol) in the time domain and one subcarrier in the frequency domain can be defined as a "RE (resource element)". Resources consisting of one OFDM symbol in the time domain and K subcarriers in the frequency domain can be defined as a "REG (resource element group)". A REG can include K REs. A REG can be used as a basic unit for resource allocation in the frequency domain. K can be a natural number. For example, K can be 12. N can be a natural number. In the slot illustrated in FIG. 7, N can be 14. N OFDM symbols can be used as a basic unit for resource allocation in the time domain.

[0107] In the present disclosure, RB may mean CRB (common RB). Alternatively, RB may mean PRB or VRB (virtual RB). In a communication system, CRB may mean RB that constitutes a set of consecutive RBs (e.g., a common RB grid) based on a reference frequency (e.g., point A). Carriers and / or bandwidth portions may be arranged on the common RB grid. That is, the carrier and / or bandwidth portions may be composed of CRB(s). RBs or CRBs that constitute the bandwidth portions may be referred to as PRBs, and within the bandwidth portions, the CRB index may be appropriately converted to the PRB index.

[0108] Downlink data can be transmitted via the PDSCH. The base station can transmit PDSCH configuration information (e.g., scheduling information) to the terminal via the PDCCH. The terminal can obtain the PDSCH configuration information by receiving the PDCCH (e.g., downlink control information (DCI)). For example, the PDSCH configuration information can include the MCS (modulation coding scheme) used for transmitting and receiving the PDSCH, time resource information of the PDSCH, frequency resource information of the PDSCH, feedback resource information for the PDSCH, etc. The PDSCH can refer to a radio resource through which downlink data is transmitted and received. Alternatively, the PDSCH can refer to the downlink data itself. The PDCCH can refer to a radio resource through which downlink control information (e.g., DCI) is transmitted and received. Alternatively, the PDCCH can refer to the downlink control information itself.

[0109] A terminal can perform a monitoring operation on the PDCCH to receive a PDSCH transmitted from a base station. The base station can inform the terminal of the configuration information for the PDCCH monitoring operation using a higher layer message (e.g., an RRC (radio resource control) message). The configuration information for the PDCCH monitoring operation can include CORESET (control resource set) information and search space information.

[0110] CORESET information may include PDCCH DMRS (demodulation reference signal) information, PDCCH precoding information, PDCCH opportunity information, etc. The PDCCH DMRS may be a DMRS used to demodulate the PDCCH. The PDCCH opportunity may be a region where the PDCCH can exist. In other words, the PDCCH opportunity may be a region where DCI can be transmitted. The PDCCH opportunity may be referred to as a PDCCH candidate. The PDCCH opportunity information may include time resource information and frequency resource information of the PDCCH opportunity. In the time domain, the length of the PDCCH opportunity may be indicated in symbol units. In the frequency domain, the size of the PDCCH opportunity may be indicated in RB units (e.g., in PRB (physical resource block) units or CRB (common resource block) units).

[0111] The search space information may include a coreset identifier (ID) associated with the search space, a period of PDCCH monitoring, and / or an offset. The period and offset of PDCCH monitoring may each be indicated on a slot-by-slot basis. In addition, the search space information may further include an index of the symbol at which the PDCCH monitoring operation begins.

[0112] A base station can configure a bandwidth part (BWP) for downlink communication. The BWP can be configured differently for each terminal. The base station can inform the terminal of the BWP configuration information using higher layer signaling. The higher layer signaling can mean "transmission operation of system information" and / or "transmission operation of RRC (radio resource control) message." The number of BWPs configured for one terminal can be one or more. The terminal can receive BWP configuration information from the base station and check the BWP(s) configured by the base station based on the BWP configuration information. When multiple BWPs are configured for downlink communication, the base station can activate one or more BWPs among the multiple BWPs. The base station can transmit the configuration information of the activated BWP(s) to the terminal using at least one of higher layer signaling, a medium access control (MAC) control element (CE), or DCI. The base station can perform downlink communication using the activated BWP(s). The terminal can identify the activated BWP(s) by receiving configuration information of the activated BWP(s) from the base station, and perform a downlink reception operation in the activated BWP(s).

[0113] Multiple Transmission and Reception Point (MTRP) technology refers to a technique in which a base station (e.g., gNB) communicates with a terminal by utilizing multiple transmission reception points (TRPs) that are physically separated. By utilizing multiple TRPs, MTRP technology can solve the problem of reduced quality-of-service (QoS) for terminals located at the cell edge when they are far from the base station, while also resolving the problem of inter-cell interference from base stations located in different cells. Furthermore, MTRP technology can play a role in providing an additional communication path, that is, a non-line-of-sight (NLOS) path, from the base station in cases where the line-of-sight (LOS) path from the base station is limited, such as in millimeter wave bands.

[0114] In the standard, MTRP technology is divided into Coherent Joint Transmission (CJT) and Non-Coherent Joint Transmission (NCJT). The CJT method allows two or more TRPs to cooperate in a synchronized manner to support data transmission to a single terminal based on a stable backhaul link between base stations connected to the TRPs. On the other hand, the NCJT method allows two or more TRPs to decide scheduling, precoding matrix selection, modulation, and coding schemes without cooperation between the TRPs in a situation where two or more TRPs support a single terminal.

[0115] Beam management for TRP in 5G NR can be defined as a set of L1 / L2 procedures that find or maintain the optimal beam required for transmission / reception at each TRP and terminal. Beam management procedures can be broadly categorized into four categories, as follows:

[0116] 1) Beam determination

[0117] 2) Beam measurement

[0118] 3) Beam reporting

[0119] 4) Beam sweeping

[0120] Here, the TRP and the UE can utilize the reciprocity characteristics of the downlink (DL) / uplink (UL) channels when managing beams. For example, the UE can utilize the values ​​measured in the receive beams (Rx beams) of the DL channel when configuring the transmit beam (Tx beam). And, the UE can utilize the values ​​measured in the transmit beams (Tx beams) of the UL channel when configuring the receive beam (Rx beam). These transmit beam configuration and receive beam configuration procedures can be performed in the same manner for the base station as for the UE. In particular, a transmission configuration indicator (TCI) has been introduced for beam management related to analog beamforming. The TCI can be used to configure a beam to be used for transmission of a specific channel and / or signal, for example, PDSCH and / or CSI-RS and / or PDCCH. The base station can dynamically indicate quasi-colocation (QCL) information to the UE by transmitting TCI through downlink control information (DCI).

[0121] Two antenna ports are said to be quasi-co-located when the channel characteristics of a symbol transmitted from one antenna port can be inferred from the channel characteristics of a symbol transmitted from the other antenna port. For convenience of explanation, in the following, when two antenna ports are quasi-co-located, we refer to them as having a QCL relationship.

[0122] FIG. 9 illustrates an example of a quasi-colocation (QCL) relationship between reference signals in a wireless communication system according to an embodiment of the present disclosure. Referring to FIG. 9, the QCL relationship between reference signals for 5G and below can be extended to generate information regarding TCI states.

[0123] The synchronization signal block (SSB) can be used by terminals to synchronize with the network and acquire basic information. The SSB can be in a QCL relationship with the tracking reference signal (TRS). Therefore, when receiving the TRS, at least one of the Doppler shift, delay average, and spatial characteristics of the SSB can be utilized.

[0124] CSI-RS (channel state information - reference signal): CSI-RS can be used by the network to determine the characteristics of the wireless channel. There are two types of CSI-RS. CSI-RS (CSI ACQ) can be used for CSI reception, and CSI-RS (BM) can be used for beam management (BM).

[0125] SSB and CSI-RS (BM) may be in a QCL relationship with CSI-RS (CSI ACQ), and at least one of the average and spatial characteristics of Doppler shift and delay may be utilized for CSI-RS (CSI ACQ) reception.

[0126] CSI-RS(BM) and SSB may have a QCL relationship with PDCCH DMRS (physical downlink control channel demodulation reference signal), and at least one of Doppler shift / spread and average / spread and spatial characteristics of delay may be utilized for reception of PDCCH DMRS.

[0127] SSB, CSI-RS (BM) and CSI-RS (CSI ACQ) may be in a QCL relationship with PDSCH DMRS, and at least one of the mean / spread and spatial characteristics of Doppler shift / spread and delay may be utilized for reception of PDCCH DMRS.

[0128] 3GGP Rel-17 introduced a TCI configuration method utilizing a unified TCI pool, or the unified TCI framework, to reduce signaling overhead for QCL configuration of DL and / or UL channels and simplify multi-beam operation compared to the previous release of 3GGP Rel-16.

[0129] According to the unified TCI framework, the base station can preset a common TCI pool that can be commonly used (or applied) for DL ​​and UL channels via RRC signaling. Furthermore, according to the unified TCI framework, the base station can directly indicate TCI for DL ​​and UL channels from the configured common TCI pool using the Medium Access Control (MAC) control element (CE) (MAC-CE) / downlink control information (DCI). Furthermore, according to the unified TCI framework, the base station can support updates to the common TCI state.

[0130] A common TCI state can be indicated (or set) for multiple component carriers (CCs). Among the multiple CCs, a reference CC can be additionally set, and TCI updates for other CCs within the indicated list can be performed simultaneously via a TCI update command for the reference CC.

[0131] At this time, there are three main methods for setting the status of TCI for DL ​​channels and UL channels.

[0132] A. Joint TCI state indication method that is commonly indicated to DL / UL channels

[0133] B. DL channel separate TCI state indication method for setting TCI separately for DL ​​channel and

[0134] C. UL Channel Separate TCI State Indication Method

[0135] Looking at the three methods above from a broader perspective, they can be divided into a joint TCI status indication method that provides common indications for both DL and UL channels, and a separate TCI status indication method that sets TCIs separately for each DL or UL channel. The fundamental difference between the two methods above lies in the existence of reciprocity between the DL and UL channels.

[0136] The Unified TCI framework was designed for a single TRP (sTRP) system in 3GPP Rel-17. However, 3GPP Rel-18 aims to expand to a multi-TRP (mTRP) system.

[0137] TCI status can be used to convey QCL relationships to terminals. TCI status contains information about QCL relationships and can be conveyed via DCI. Section 5.1.5 of 3GPP TS 38.214 defines the procedure for conveying QCL information as follows:

[0138]

[0139]

[0140]

[0141]

[0142]

[0143]

[0144]

[0145]

[0146]

[0147]

[0148]

[0149]

[0150]

[0151] As above, the UE can be configured with TCI-State configuration lists through higher layer parameters (e.g., PDSCH-Config). The UE can decode the PDSCH using the TCI-State configuration lists. Each TCI state can include parameters that configure the QCL relationship between one or two downlink reference signals and the DM-RS port of the PDSCH, the DM-RS port of the PDCCH, or the CSI-RS port(s) of the CSI-RS resource. The QCL can be configured for the first DL RS using the higher layer parameter qcl-Type1, and for the second DL RS using qcl-Type2. The QCL types of the two DL RSs can be configured differently regardless of whether they are DL RSs with the same reference or different DL RSs. The QCL type corresponding to each DL RS can be configured by the higher layer parameter (e.g., qcl-Type in QCL-Info). The QCL type can have one of the following values:

[0152] - typeA: {Doppler shift, Doppler spread, average delay, delay spread}

[0153] - typeB: {Doppler shift, Doppler spread}

[0154] - typeC: {Doppler shift, average delay}

[0155] - typeD: {Spatial Rx parameter}

[0156] Here, the Spatial RX parameter can refer to any one of various parameters, such as Angle of arrival (AoA), Power Angular Spectrum (PAS) of AoA, Angle of departure (AoD), PAS of AoD, transmit / receive channel correlation, transmit / receive beamforming, and spatial channel correlation.

[0157] The base station can transmit configuration information regarding whether to apply information in the transmission configuration indication (TCI) field included in the downlink control information (DCI) to the terminal through upper layer signaling.

[0158] Additionally, the terminal may receive information regarding TCI states or TCI state pairs. For example, the base station may transmit multiple TCI states to the terminal via RRC signaling, and may set some of them as TCI states for CORESET. The terminal may receive an activation command. The activation command may be used to map TCI state(s) and / or TCI state pair(s) to codepoints in the DCI field 'transmission configuration indication'.

[0159] In addition, as shown in FIG. 10, a unified TCI state can be configured to set a beam by integrating multiple channels or reference signals. FIG. 10 illustrates the concept of a unified TCI (transmission configuration indicator) state in a wireless communication system according to an embodiment of the present disclosure. The base station can transmit information about beam settings for CSI-RS, CORESET, PDSCH, PUSCH, PUCCH, SRS, etc. to the terminal through the unified TCI state without having to transmit the TCI state for each channel to the terminal. Whether the unified TCI state is activated can be explicitly or implicitly transmitted to the terminal. For example, when the BWP of the CC does not have a TCI-State or TCI-UL-State configuration, the terminal can apply the TCI-State or TCI-UL-State configuration from the reference BWP of the reference CC configured by the unified TCI-StateRef.

[0160] A multiple transmission and reception point (M-TRP) technique can be proposed, in which communication is performed through multiple transmitting and receiving nodes. The M-TRP technique can be divided into a single control information technique (single downlink control information (S-DCI)) that controls transmission and reception through multiple nodes through a single control information, and a multiple downlink control information technique (multiple downlink control information (M-DCI)) that separately transmits information for each node. In addition, the procedure for transmitting TCI information may vary depending on whether TCI information for uplink and downlink is set separately or jointly.

[0161] FIG. 11 illustrates an example of a process for transmitting a TCI state in a multi-transmission reception point (M-TRP) structure in a wireless communication system according to an embodiment of the present disclosure.

[0162] Referring to Fig. 11, the configuration types related to TCI are classified into separate types and joint types. The separate type method is a method in which the TCI state is set through separate TCI state lists for uplink and downlink respectively, and the joint type method is a method in which the TCI state is set through the TCI state lists of the joint for uplink and downlink. The base station can convey the configuration type related to the unified TCI to the terminal through unifiedTCI-StateType in ServingCellConfig. In addition, the base station can convey information about the resource set for the reference signal to the terminal through PDSCH-Config, and the PDSCH-Config can be included in the BWP-Downlink IE.

[0163] Additionally, the terminal can be configured with a list of up to 128 TCI state configurations via upper layer parameters (e.g., dl-OrJointTCI-StateList in PDSCH-Config). The TCI configuration list can be used to provide criteria for determining ULTX spatial filters for dynamic-grant and configured-grant based PUSCH and PUCCH resources and SRS in BWP / CC.

[0164] Among the TCI state settings, the TCI state settings to be activated can be transmitted through the TCI state activation / deactivation MAC CE. The integrated TCI state activation / deactivation MAC CE can indicate the TCI state ID to be activated. The integrated TCI state activation / deactivation MAC CE includes a serving cell ID, a DL BWP ID, and a UL BWP ID. It can indicate a serving cell and a BWP to which the MAC CE can be applied as a code point. The Pi field can indicate whether each ith code point includes multiple TCI states or a single TCI state. When Pi = 1, the ith TCI code point includes multiple TCI states, and when Pi = 0, the ith TCI code point can include only a DL / joint TCI state or only a UL TCI state.

[0165] The D / U field can indicate whether the TCI state corresponding to the TCI state ID existing in the same octet is a DL / joint TCI state or an UL TCI state. Therefore, in FIG. 11, the D / U field belonging to the same octet as a separate type of DL TCI state and a joint type of TCI state can be set to 1, and the D / U field belonging to the same octet as a separate type of UL TCI state can be set to 0.

[0166] Unlike the integrated TCI state enable / disable MAC CE, the enhanced integrated TCI state enable / disable MAC CE for joint TCI states can jointly manage the TCI states of uplink and downlink, so the UL BWP ID can be omitted. The Fi,j field indicates whether the jth joint TCI state exists in the TCI state ID field associated with code point i of the DCI Transmission Configuration Indication field. Here, j can have the value 1 or 2. Therefore, in the case of the joint type as in step#2 of FIG. 11, up to two joint TCI states can correspond to each code point, and up to 16 joint TCI states can be activated.

[0167] Unlike the unified TCI state enable / disable MAC CE, the enhanced unified TCI state enable / disable MAC CE for separate TCI states may include an Fi,j field and a Si,j field. The Fi,j field indicates whether the jth DL TCI state exists in the TCI state ID field associated with the code point i of the DCI Transmission Configuration Indication field. The Si,j field indicates whether the jth UL TCI state exists in the TCI state ID field associated with the code point i of the DCI Transmission Configuration Indication field. Therefore, in the case of the separate type of step#2 of FIG. 11, since each code point can correspond to at most two DL TCI states and at most two UL TCI states, a maximum of 32 TCI states can be enabled.

[0168] A base station can transmit DCI to a terminal via a PDCCH. The DCI can include a transmission configuration indication field, and decoding can be performed using a TCI state corresponding to codepoint i of the transmission configuration indication field included in the DCI. As described above, the correspondence between codepoint i and a TCI state can be indicated by a TCI state activation command. That is, when a terminal receives a single TCI state for a CORESET or receives a MAC CE activation command for one or two of the TCI states provided for the CORSET, the terminal can assume that the DM-RS antenna port associated with PDCCH receptions within the CORESET is in a QCL relationship with one or more DL RSs configured by the TCI states.

[0169] A TCI state can be indicated by splitting it into two states. For example, if the terminal is provided with dl-OrJointTCI-StateList, the TCI states can be indicated through a combination of two TCI states (the first TCI state, the second TCI state, the first TCI state and the second TCI state, none). For example, if the terminal indicates the first TCI state through apply-IndicatedTCISate, the terminal can assume that the reference signal provided by the first TCI state and the DM-RS antenna port for PDCCH reception are in a QCL relationship.

[0170] If dl-OrJointTCI-StateList is provided to the UE and coresetPoolIndex is not provided to the UE or coresetPoolIndex is provided with 0 for the first coreset in the active DL BWP of the serving cell, the UE may assume that the DM-RS antenna ports for PDCCH reception in the first and second coresets and the DM-RS antenna ports for PDSCH reception scheduled by the DCI formats provided by PDCCH reception in the first and second coresets are in a QCL relationship with the reference signals provided by the TCI states specific to the first and second CORESETs, respectively. Furthermore, the UE may transmit the PUSCH scheduled by the DCI formats provided by PDCCH reception in the first and second CORESETs, respectively, using the spatial domain filters corresponding to the TCI states specific to the first and second CORESETs, respectively.

[0171] The TCI state can be used to transmit uplink signals. Uplink power control can be used to determine power for PUSCH, PUCCH, SRS, or PRACH transmissions. The UE can be configured not to maintain more than four path loss estimates simultaneously for PUSCH / PUCCH / SRS transmissions per serving cell.

[0172] For PUSCH, PUCCH, SRS, or PRACH transmissions, a transmission opportunity can be defined by a slot index within a frame, the first symbol within the slot, and the number of consecutive symbols. If the UE receives TCI states in dl-OrJointTCI-StateList, an RS index for downlink path loss estimation for PUSCH, PUCCH, or SRS transmission can be provided for each one or both TCI states for PUSCH, PUCCH, or SRS transmission opportunities.

[0173] Power control values ​​can be set explicitly or implicitly. For example, if followUnifiedTCI-StateSRS is set, power control values ​​are provided from p0AlphaSetforSRS associated with the TCI state. If followUnifiedTCI-StateSRS is not set, power control values ​​and an RS index for path loss estimation can be provided from the TCI state associated with the SRS resource with the lowest SRS-ResourceId. In this case, the overall SRS power value can be determined based on the sum of individual SRS power control values ​​and additional components according to the SRS resource set.

[0174] Hereinafter, the initial connection procedure between a terminal and a base station will be described. If the initial connection procedure is performed with the base station due to reasons such as the terminal's power on / off operation or loss of coverage, an identification procedure between the base station and the terminal may be required. First, the terminal may perform an initial cell search operation with the base station. The terminal may perform monitoring to receive a synchronization signal. The synchronization signal may be at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). The terminal may receive a physical broadcast channel (PBCH) signal from the base station to obtain broadcast information within the cell. Based on the physical broadcast channel, the terminal may obtain information about the cell using at least one of the MIB or SIB. A block including all of the PSS, SSS, and PBCH may be referred to as a synchronization signal block (SSB).

[0175] A terminal can perform a random access procedure. The terminal can transmit a preamble to the base station and receive a random access response (RAR) from the base station. The RAR message can include a temporary identifier. The terminal can transmit MSG3 (or an RRC connection request message) using the scheduling information in the RAR, and the base station can perform a contention resolution procedure by transmitting MSG4 (or a contention resolution message) to the terminal in response to MSG3.

[0176] The base station can perform beam management based on the RACH opportunity used for preamble transmission in the random access procedure. For example, the base station can determine the beam on which the terminal received the synchronization signal based on the RACH opportunity in which the preamble was transmitted. As described above, a synchronization signal can also be included as a reference signal for indicating the QCL relationship, and the QCL relationship can be established based on the SSB received through the initial access procedure.

[0177] Additionally, a channel measurement procedure may be performed for beam management. The terminal may receive a reference signal from the base station. Based on this, the terminal may report channel state information (CSI) to the base station. The channel state information may include at least one of reference signal received power (RSRP), reference signal received quality (RSRQ), and signal-to-noise ratio (SNR). The base station may use the received channel state information to adjust beamforming for the terminal or optimize radio resource allocation. For channel measurement, the base station may transmit configuration information for channel measurement to the terminal. The configuration information for channel measurement may include information related to a measurement target, a measurement cycle, and the like.

[0178] Base station and terminal beam settings can be managed through artificial intelligence (AI). For convenience, beam set B refers to the beam set where measurements are performed using AI / ML model input, and beam set A refers to the beam set determined based on AI / ML model inference. Beam sets A and B may contain beam information for the same frequency range.

[0179] Artificial intelligence can be used to infer spatial domain downlink beams for beam set A based on measurements of beam set B. As another example, artificial intelligence can be used to infer temporal downlink beams for beam set A based on past measurements of beam set B. Here, beam set A and beam set B may be different sets, or beam set B may be a subset of beam set A.

[0180] Additionally, the input of the artificial intelligence model can be formed from various combinations. For example, the input of the artificial intelligence can include at least one of an L1-RSRP measurement based on beam set B, other auxiliary information, a channel impulse response (CIR) based on beam set B, and a downlink Tx / Rx beam ID associated with the L1-RSRP measurement of beam set B.

[0181] The aforementioned artificial intelligence model can be designed to infer a beam including at least one of a downlink reception beam and a downlink transmission beam. In addition, the output of the artificial intelligence model can include at least one of a transmission beam, a reception beam, an L1-RSRP of the transmission beam, an L1-RSRP of the reception beam, an angle of the transmission beam, an angle of the reception beam, and other information.

[0182] The beam management method using an AI model is not limited to the aforementioned method. The AI ​​model can be configured in various ways by configuring inputs and outputs with various combinations of settings for beam sets A and B, performance monitoring, data collection, and auxiliary information.

[0183] Learning and inference methods can also be implemented in various ways. For example, artificial intelligence can be learned or trained using an AI / ML (artificial intelligence / machine learning) model. Learning and training can be performed by the network or the UE. Furthermore, learning and inference can be performed on different devices. For example, learning can be performed on the network and inference on the UE. Split learning can be performed in such a way that some of the learning is performed on a first device and some on a second device. Similarly to learning, split inference can be performed using multiple devices. Input data for inference can also be generated in various ways. For example, input data can be generated on the UE, and inference can be performed using the input data on the network. Furthermore, input data generated on the UE can be used for inference within the UE.

[0184]

[0185] The present disclosure hereinafter describes techniques related to beam reporting, particularly UE-initiated / event-driven beam reporting (UE-BR), in a wireless communication system. In particular, the present disclosure proposes various embodiments related to signaling and procedures for performing UE-BR.

[0186]

[0187] A base station can configure a triggering event or triggering condition to cause a UE to perform a beam reporting operation when a specific triggering condition is satisfied. In the present disclosure, a beam reporting operation performed by a UE in response to satisfying a configured triggering event is referred to as UE-BR. For the UE-BR operation, the base station can configure a triggering condition for UE-BR using a combination of one or more of higher layer signaling such as RRC, MAC-CE, and DCI. When the UE-BR operation is triggered, the UE can perform the UE-BR operation as follows.

[0188] FIG. 12 illustrates a first example of a procedure for UE-BR in a wireless communication system according to an embodiment of the present disclosure. Referring to FIG. 12 , in step S1201, a terminal (1210) transmits a first UL channel to a base station (1220). That is, in response to triggering for UE-BR, the terminal (1210) may transmit control information for beam reporting on the first UL channel. Here, the control information may include a request for scheduling. In step S1203, the base station (1220) transmits a DCI to the terminal (1210). The DCI includes scheduling information for beam reporting. In step S1205, the terminal (1210) transmits a second UL channel to the base station (1220). That is, the terminal (1210) transmits a beam report on the second UL channel.

[0189] FIG. 13 illustrates a second example of a procedure for UE-BR in a wireless communication system according to an embodiment of the present disclosure. Referring to FIG. 13 , in step S1301, a terminal (1310) transmits a first UL channel to a base station (1320). That is, in response to triggering for UE-BR, the terminal (1310) may transmit control information for a beam report on the first UL channel. Here, the control information may include a notification for transmission of the beam report. In step S1303, the terminal (1310) transmits a second UL channel to the base station (1320). That is, the terminal (1310) transmits a beam report on the second UL channel.

[0190] For convenience of explanation, the present disclosure refers to the method illustrated in FIG. 12 as mode A, and the method illustrated in FIG. 13 as mode B. In mode A, a first UL channel may include a PUCCH that carries a scheduling request (SR) requesting UL resource allocation for UE-BR, or a PUSCH that includes SR information. Accordingly, the base station may indicate specific UL resources for UE-BR through DCI, or allocate UL resources to be used for UE-BR. The UE performs UE-BR using the second UL channel. At this time, the second UL channel may include a PUCCH or a PUSCH. In mode B, the first PUCCH is transmitted to notify the base station that the UE will use a pre-allocated or pre-configured second UL channel for UE-BR. Thereafter, the UE performs UE-BR using the second UL channel. At this time, the first UL channel and / or the second UL channel may include a PUCCH or a PUSCH.

[0191] In Mode A and Mode B, the UE may transmit additional information related to the UE-BR through the first UL channel. According to various embodiments, the additional information may include at least one of the number of beams that the UE intends to report, the amount of data regarding information included in the report, or the amount of resources required for beam information reporting. Alternatively, the additional information may be multiplexed with other types of uplink control information (UCI). Alternatively, the additional information may include indication information for distinguishing it from UCI transmitted on a conventional PUCCH or PUSCH. However, for the convenience of the following description, the present disclosure assumes that SR or notification information is transmitted through the first UL channel.

[0192] In FIGS. 12 and 13, the terminal may select a resource to be used as the first UL channel from among the pre-configured UL resources. Alternatively, the terminal may select a resource to be used as the first UL channel from among the pre-configured UL resources and UL resources set by the DCI. A procedure may be operated such that, among the UL resources selectable as the first UL channel, the UL resource that can be transmitted at the earliest point in time after UE-BR is triggered is used as the first UL channel. Alternatively, a procedure may be operated such that, among the UL resources that have a resource size capable of transmitting all data to be transmitted through the first UL channel, the UL resource with the earliest point in time is used as the first UL channel.

[0193] The triggering point of UE-BR can be a symbol or slot in which a triggering condition is satisfied. Or, it can be the last symbol of a slot in which the triggering condition is satisfied. Or, the triggering point of UE-BR can be a symbol or slot in which measurements for RSs (reference signals) set for current beam measurement are all completed in a situation in which the triggering condition is satisfied. Or, the triggering point of UE-BR can be the last symbol of a slot in which measurements for RSs set for beam measurement are all completed. Therefore, a procedure can be operated to use the UL resource that can be transmitted at the earliest point in time after a specific symbol or slot corresponding to the triggering point as the first UL channel.

[0194] In the above-described operation, a procedure may be operated to use the UL resource that can be transmitted as the first UL channel at the earliest point in time after a specific X symbols or X slots after a specific symbol or slot corresponding to the triggering point in time. Here, the X time intervals may be the minimum required time or duration required to perform the UE-BR operation.

[0195]

[0196] FIG. 14 illustrates an example of a procedure for transmitting a beam report in a wireless communication system according to one embodiment of the present disclosure. FIG. 14 also illustrates an operating method of a terminal.

[0197] Referring to FIG. 14, at step S1401, the terminal detects an event for beam reporting. The event for beam reporting is a triggering event and can be defined based on a measurement value for a reference signal. That is, the terminal performs a measurement for at least one reference signal and determines that the measurement result satisfies the event condition. Here, the event condition can be configured by upper layer signaling.

[0198] In step S1403, the terminal transmits control information for beam reporting. The terminal transmits control information related to the beam reporting in response to detection of an event for beam reporting. According to various embodiments, the control information may include a request for resource allocation for beam reporting or a notification for beam reporting. Here, the control information may be transmitted on a first UL channel. The first UL channel may include a PUCCH or a PUSCH. The first UL channel may be used based on at least one time offset configured by the base station. For example, the terminal may select a resource to be used as the first UL channel from among pre-configured UL resources based on at least one time offset. Alternatively, the terminal may select a resource to be used as the first UL channel from among pre-configured UL resources and UL resources set by DCI based on at least one time offset.

[0199] In step S1405, the terminal transmits a beam report. The terminal may transmit the beam report through a second UL channel corresponding to the control information. The second UL channel may include a PUCCH or a PUSCH. The second UL channel may include a channel allocated in response to the control information or a channel indicated by the control information among pre-configured channels. The second UL channel may include a channel selected based on at least one time offset configured by the base station. The time offset may be determined based on a time point at which an event for the beam report is detected or a time point at which the first UL channel is transmitted (e.g., a time point at which control information for the beam report is transmitted). According to one embodiment, the second UL channel may include an available UL channel that is within a time offset from a time point at which control information for the beam report is transmitted among the pre-configured channels, and is the earliest UL channel in the time axis from the time point at which control information for the beam report is transmitted. Alternatively, the second UL channel may be a UL channel within a time offset from the time point at which the control information for the beam report is transmitted among the pre-configured UL channels, and may include the first available UL channel after a predefined number of symbols on the time axis from the time point at which the control information for the beam report is transmitted. The format of the beam report and the configuration for selecting beam(s) to be included in the beam report may be signaled in advance, in which case the terminal may generate and transmit the beam report based on the configuration.

[0200]

[0201] FIG. 15 illustrates an example of a procedure for receiving a beam report in a wireless communication system according to one embodiment of the present disclosure. FIG. 15 also illustrates an operating method of a base station.

[0202] Referring to FIG. 15, in step S1501, the base station receives control information for beam reporting. In response to detection of an event for beam reporting of the terminal, control information related to the beam reporting may be received from the terminal. According to various embodiments, the control information may include a request for resource allocation for beam reporting or a notification for beam reporting. Here, the control information may be transmitted on a first UL channel. The first UL channel may include a PUCCH or PUSCH selected based on a time offset. For example, the first UL channel may include a PUCCH or PUSCH including available resources within a time corresponding to at least one first time offset based on a detection time of an event for beam reporting of the terminal. The at least one first time offset may be configured by the base station.

[0203] In step S1503, the base station receives a beam report. The base station may receive the beam report through a second UL channel corresponding to the control information. The second UL channel may include a PUCCH or a PUSCH. The second UL channel may include a channel allocated in response to the control information or a channel indicated by the control information among pre-configured channels. The second UL channel may include a channel selected based on at least one time offset configured by the base station. The time offset may be determined based on a time point at which an event for the beam report is detected or a time point at which the first UL channel is transmitted (e.g., a time point at which control information for the beam report is transmitted). According to one embodiment, the second UL channel may include an available UL channel that is within a time offset from a time point at which control information for the beam report is transmitted among the pre-configured channels, and is the earliest UL channel in the time axis from the time point at which control information for the beam report is transmitted. Alternatively, the second UL channel may be a UL channel within a time offset from the time point at which the control information for the beam report is transmitted among the pre-configured UL channels, and may include the first available UL channel after a predefined number of symbols on the time axis from the time point at which the control information for the beam report is transmitted. The format of the beam report and the configuration for selection of beam(s) to be included in the beam report may be signaled in advance, in which case the base station may receive the beam report generated based on the configuration.

[0204]

[0205] UE-BR can be performed according to the procedures described above. Specific embodiments of each operation included in the procedures described above are described below. Specific embodiments of each operation may be defined differently depending on the mode, and embodiments of UE-BR operations for each mode are as follows.

[0206]

[0207] [Example #1]

[0208] In FIGS. 12 and 13, a procedure may be implemented to use only preconfigured PUCCH resources for SR or notification transmission via the first UL channel. If there are no preconfigured PUCCH resources within a specific time offset after UE-BR is triggered, the UE may suspend UE-BR operation. At this time, the time offset value may be configured by a combination of one or more of higher layer signaling such as RRC, MAC-CE, or DCI. Additionally, the time offset value may be determined based on the time point at which UE-BR is triggered.

[0209] FIG. 16 illustrates an example of a control information transmission procedure for beam reporting in a wireless communication system according to an embodiment of the present disclosure. FIG. 16 also illustrates an operation method of a terminal.

[0210] Referring to FIG. 16, in step S1601, the terminal determines whether there are available PUCCH resources within a time offset. The time offset may include a first time offset configured by the base station using at least one of higher layer signaling or DCI. In other words, the terminal may check whether at least one PUCCH resource among the pre-configured PUCCH resources is located within the first time offset from the time at which an event for beam reporting is detected. Here, the pre-configured PUCCH resources may include pre-configured PUCCH resources as candidate channels for the first UL channel. If at least one PUCCH resource among the pre-configured PUCCH resources is located within the first time offset from the time at which an event for beam reporting is detected, it may be determined that there are available PUCCH resources within the first time offset. If the pre-configured PUCCH resources are not located within the first time offset from the time at which an event for beam reporting is detected, it may be determined that there are no available PUCCH resources within the first time offset. The terminal can determine whether to suspend beam reporting based on whether available PUCCH resources exist within the first time offset. In other words, the first time offset can be used as a condition for determining whether to suspend beam reporting.

[0211] If there are no available PUCCH resources within the time offset, the terminal stops the beam reporting operation at step S1605. In other words, if the pre-configured PUCCH resources are not located within the first time offset from the time at which an event for beam reporting is detected, the terminal may stop beam reporting.

[0212] If there are available PUCCH resources within the time offset, in step S1603, the terminal transmits control information using the available PUCCH resources. If at least one PUCCH resource among the pre-configured PUCCH resources is located within the first time offset from the time at which an event for beam reporting is detected, the terminal may transmit control information using the corresponding PUCCH resource. After transmitting the control information, the terminal may operate according to Mode A or Mode B. For example, the terminal may receive DCI according to Mode A and transmit a beam report based on the received DCI, or transmit a beam report according to Mode B.

[0213]

[0214] [Example #2]

[0215] In FIGS. 12 and 13 , a procedure may be implemented to preferentially use pre-configured PUCCH resources when transmitting SRs or notifications via the first UL channel. If pre-configured PUCCH resources available for SRs or notifications are not available within a specific time offset (e.g., the first time offset) after UE-BR is triggered, the following actions may be performed.

[0216] - If there is a PUSCH available to the terminal within the time offset, the terminal can multiplex the SR or notification to be transmitted through the first PUCCH onto the corresponding PUSCH channel.

[0217] - If there is no PUSCH available to the UE within the time offset, i.e., if the timer corresponding to the time offset expires, the UE may stop UE-BR operation.

[0218] The value of the time offset can be configured by a combination of one or more of upper layer signaling, such as RRC, MAC-CE, or DCI. Additionally, the value of the time offset can be determined based on the time point at which the UE-BR is triggered. The base station and / or the terminal can configure and operate a timer to perform a transmission operation of the first UL channel within the time offset. This timer can be referred to as the first UE-BR-ProhibitTimer.

[0219] FIG. 17 illustrates an example of a control information transmission procedure for beam reporting in a wireless communication system according to one embodiment of the present disclosure. FIG. 17 also illustrates an operation method of a terminal.

[0220] Referring to FIG. 17, in step S1701, the terminal checks whether there are available PUCCH resources within the time offset. The time offset may be configured by the base station using at least one of higher layer signaling or DCI. In other words, the terminal may check whether at least one PUCCH resource among the pre-configured PUCCH resources is located within the time offset from the time at which an event for beam reporting is detected. Here, the pre-configured PUCCH resources may include pre-configured PUCCH resources as candidate channels for the first UL channel. If at least one PUCCH resource among the pre-configured PUCCH resources is located within the time offset from the time at which an event for beam reporting is detected, it may be determined that there are available PUCCH resources within the time offset. If the pre-configured PUCCH resources are not located within the time offset from the time at which an event for beam reporting is detected, it may be determined that there are no available PUCCH resources within the time offset. The terminal can determine whether to suspend beam reporting based on whether available PUCCH resources exist within the time offset. In other words, the time offset can be used as a condition for determining whether to suspend beam reporting.

[0221] If there are available PUCCH resources within the time offset, in step S1709, the terminal transmits control information using the available PUCCH resources. If at least one PUCCH resource among the pre-configured PUCCH resources is located within the time offset from the time at which an event for beam reporting is detected, the terminal may transmit control information using the corresponding PUCCH resource. After transmitting the control information, the terminal may operate according to Mode A or Mode B. For example, the terminal may receive DCI according to Mode A and transmit a beam report based on the received DCI, or transmit a beam report according to Mode B.

[0222] If there are no available PUCCH resources within the time offset, in step S1705, the terminal checks whether there are available PUSCH resources within the time offset. In other words, if the pre-configured PUCCH resources are not located within the time offset from the time at which an event for beam reporting is detected, the terminal can check whether there are available PUSCH resources within the time offset from the time at which the event for beam reporting is detected. The terminal can determine whether to stop beam reporting based on whether there are available PUSCH resources within the time offset. In other words, the time offset can be used as a condition for determining whether to stop beam reporting.

[0223] If there are available PUSCH resources within the time offset, in step S1705, the terminal transmits control information using the available PUSCH resources. If there are available PUSCH resources within the time offset from the time at which an event for beam reporting is detected, the terminal may transmit control information using the corresponding PUCCH resources. At this time, the control information for the beam report may be multiplexed onto the available PUSCH. In other words, the information for the beam report may be multiplexed with uplink data on the available PUSCH and then transmitted. After transmitting the control information, the terminal may operate according to Mode A or Mode B. For example, the terminal may receive DCI according to Mode A and transmit a beam report based on the received DCI, or transmit the beam report according to Mode B.

[0224] If there are no available PUSCH resources within the time offset, the terminal stops the beam reporting operation at step S1707. In other words, if there are no available PUCCH resources or available PUSCH resources within the time offset from the time at which an event for beam reporting is detected, the terminal may stop beam reporting.

[0225]

[0226] [Example #3]

[0227] In the operation of Mode A according to FIG. 12 and Embodiment #2, after the first PUCCH or the first PUSCH transmission, the terminal receives allocation information for the second UL channel via DCI. The terminal can expect to receive the DCI within a time offset (e.g., the second time offset) after the first UL transmission. At this time, the value of the time offset can be configured by a combination of one or more of upper layer signaling such as RRC, MAC-CE, or DCI. In addition, the value of the time offset can be determined based on the first UL channel transmission time. For the operation of the time offset, the base station and / or the terminal can configure and operate a specific timer. The timer can be referred to as the second UE-BR-ProhibitTimer. If the DCI is not received, i.e., if the second UE-BR-ProhibitTimer expires while the DCI is not received, the following operation can be performed.

[0228] - The terminal may initialize the second UE-BR-ProhibitTimer along with the retransmission of the first UL channel and attempt to receive DCI. At this time, the number of retransmission attempts or the time offset during which retransmission is allowed may be configured and operated. If the number of times allowed for retransmission is limited, the terminal may perform retransmission of the first UL channel up to the maximum number of allowed retransmissions, and may stop UE-BR if the DCI is not received. If the value of the time offset allowing retransmission is configured and operated, the time offset value may be determined based on the time point at which UE-BR is triggered. For convenience of explanation, the timer for the time offset allowing retransmission may be referred to as UE-BR-Timer. In this case, the terminal may repeatedly perform retransmission of the first UL channel for DCI reception until the UE-BR-Timer expires. When the first UL channel is retransmitted, the second UE-BR-ProhibitTimer may be initialized. When the maximum number of retransmissions is reached or the UE-BR-Timer expires, the terminal may stop the UE-BR operation.

[0229] - Alternatively, the terminal may suspend UE-BR operation without retransmitting the first UL channel. In the above two methods, the terminal may perform random access operation after UE-BR suspension.

[0230] FIG. 18 illustrates an example of a beam report transmission procedure in a wireless communication system according to one embodiment of the present disclosure. FIG. 18 also illustrates an operation method of a terminal.

[0231] Referring to FIG. 18, in step S1801, the terminal detects an event for beam reporting. The terminal can detect an event for beam reporting based on a measurement value for at least one reference signal.

[0232] In step S1803, the terminal transmits control information. In other words, the terminal transmits control information for the beam report. At this time, the terminal may transmit the control information for the beam report on the first UL channel. The first channel may include a PUCCH or a PUSCH.

[0233] In step S1805, the terminal initializes a first timer. The timer corresponds to a time offset configured and operated for DCI reception, and can be initialized and run at the time of transmission of the first UL channel. For example, the terminal can initialize the first timer for the time offset in response to transmission of the first UL channel. The first timer can include a second UE-BR-ProhibitTimer.

[0234] In step S1807, the terminal determines whether DCI is received before the first timer expires. The terminal may attempt to receive DCI within a time offset corresponding to the first timer from the time at which control information for beam reporting is transmitted on the first UL channel.

[0235] If DCI is received before the first timer expires, in step S1815, the terminal transmits a beam report based on the received DCI. The terminal may transmit the beam report on the second UL channel based on the received DCI.

[0236] If the DCI is not received before the first timer expires, in step S1809, the terminal determines whether retransmission is possible. Whether retransmission is possible may be determined based on the number of retransmission attempts or the elapsed time since the UE-BR was triggered. That is, whether retransmission is possible may be determined based on the maximum number of retransmissions allowed or the time offset within which retransmission is allowed. Here, a second timer may be used to determine the time offset within which retransmission is allowed. For example, if the number of retransmission attempts is limited, the terminal may check whether the number of retransmission attempts of the first UL channel is within the maximum number of retransmissions allowed. Alternatively, if the time within which retransmission is allowed is limited, the terminal may check whether the time at which retransmission is to be performed is within the time offset within which retransmission is allowed.

[0237] If retransmission is possible, the terminal retransmits the control information in step S1811. If the number of retransmission attempts is within the maximum allowed number of retransmissions, or if the retransmission is performed within the allowed time offset, the terminal may retransmit the first UL channel containing the control information for the beam report.

[0238] If the tolerance is exceeded, the terminal stops the beam reporting operation at step S1812. If the number of retransmission attempts exceeds the maximum number of allowed retransmissions, or if the point in time at which retransmission is performed exceeds the time offset within which retransmission is allowed, the terminal may stop the beam reporting operation.

[0239]

[0240] [Example #4]

[0241] In the operation of Mode B according to FIG. 13 and Embodiment #2, the terminal may be configured and operated to transmit the first UL channel and the second UL channel within a time offset. At this time, the value of the time offset may be determined based on the UE-BR triggering time point. In this case, the time offset may mean a time regulation for transmitting both the first UL channel and the second UL channel. For example, the first UL channel and the second UL channel may be transmitted within a third time offset configured by the base station from the time point at which an event for beam reporting is detected, i.e., the UE-BR triggering time point.

[0242] Alternatively, the terminal may be configured and operated to transmit a second UL channel within a specific time offset after transmitting the first UL channel. In this case, the value of the time offset may be determined based on the time point of transmitting the first UL channel. In this case, the time offset may refer to a time regulation for transmitting the second UL channel. For example, the second UL channel may be transmitted within a fourth time offset configured by the base station from the time point at which the first UL channel is transmitted.

[0243] The value of the time offset (e.g., the third time offset or the fourth time offset) can be configured by a combination of one or more of upper layer signaling such as RRC, MAC-CE, or DCI. Here, the time offset can be used as a condition for determining whether to stop beam reporting. If the first UL channel and the second UL channel cannot be transmitted within the time offset (e.g., the third time offset) from the UE-BR triggering time point, the terminal can stop the UE-BR operation. Alternatively, if the second UL channel cannot be transmitted within the time offset (e.g., the fourth time offset) from the first UL channel transmission time point, the terminal can stop the UE-BR operation. In the present embodiment, after the UE-BR is stopped, the terminal can perform a random access operation.

[0244]

[0245] [Example #5]

[0246] After UE-BR triggering, there may be a case where only the first UL channel can be transmitted using the pre-configured UL resources. For example, in a situation where only the first UL channel is pre-configured, the second UL channel may collide with another channel. As another example, there may not be any resources available as the second UL channel within a given time interval. As another example, scheduling via DCI may not be performed due to the lack of schedulable resources as the second UL channel. In this case, in embodiment #4, the terminal may transmit only the first UL channel to the base station without stopping the UE-BR operation. The information indicated through the first UL channel may indicate that a situation has occurred that satisfies the triggering condition, or that there are no pre-configured resources to be used for second UL channel transmission.

[0247] For example, if the information indicated through the first UL channel notifies that a situation has occurred that satisfies a triggering condition, and the triggering condition of the UE-BR is that there is a beam with better quality than the current beam, the terminal can notify the base station that a beam with better quality than the current beam is available through the first UL channel transmission. In other words, the transmission of the first UL channel may implicitly signal that a beam with better quality than the current beam is available, or the control information for the beam report transmitted through the first UL channel may include information indicating that a beam with better quality than the current beam is available. In this case, the base station may perform an NW-initiated beam reporting operation or control to re-perform the UE-BR operation. That is, the terminal may receive an instruction from the base station to perform an NW-initiated beam reporting operation or to re-perform UE-BR. For the NW-initiated beam reporting, the base station may transmit control information including an instruction for CSI beam reporting to the terminal based on a pre-configured CSI-related configuration, and the terminal may transmit the CSI beam report.

[0248] As another example, if the information indicated via the first UL channel indicates that there are no pre-configured resources for the second UL channel transmission, the base station can switch to Mode A operation and allocate the second UL channel via DCI. In other words, the control information for the beam report transmitted via the first UL channel can include information indicating that there are no pre-configured UL resources for the second UL channel. In this case, the terminal can receive the DCI from the base station allocating the second UL resource.

[0249]

[0250] [Example #6]

[0251] In the procedure according to FIG. 12 and Mode A, if there is no first UL channel available after UE-BR triggering, the first UL channel may be transmitted through a UL channel assigned to another CC (component carrier). Thereafter, the terminal may be allocated resources for the second UL channel by receiving DCI and transmit a beam report.

[0252] At this time, the procedure may be operated so that the second UL channel is allocated on the CC where the first UL channel is transmitted. Alternatively, the procedure may be operated so that the second UL channel is allocated on the CC where the UE-BR is triggered. Alternatively, the procedure may be operated so that the second UL channel is allocated on the CC where the DCI is received. In other words, the procedure may be operated so that the UE-BR is transmitted on the second UL channel within the CC where the CSI reporting configuration corresponding to the UE-BR is configured. Alternatively, the procedure may be operated without restrictions on the CC that allocates the second UL channel. Cross-CC resource allocation for the first UL channel and the second UL channel may be operated according to a simple modification, combination, or extended method of the above-described methods.

[0253] Through the first UL channel or the second UL channel, the terminal can transmit indication information for a CC indicating which beam measured from which CC the UE-BR currently being performed is based.

[0254]

[0255] FIG. 19 illustrates an example of a procedure for transmitting a cross-carrier beam report in a wireless communication system according to an embodiment of the present disclosure. FIG. 19 also illustrates an operating method of a terminal.

[0256] Referring to Figure 19, at step S1901, the terminal detects an event for a beam report from the first CC. The conditions for the event for the beam report can be configured in advance through upper-layer signaling. At this time, the conditions for the event can be configured on a per-CC basis or in a common CC-wide manner. That is, the terminal determines whether the conditions for the event are satisfied based on the reference signal received from the first CC.

[0257] In step S1903, the terminal transmits control information on the second CC. After an event for a beam report is detected on the first CC, if there is no first UL channel available on the first CC, the terminal determines a first UL channel based on a UL channel allocated on another CC, the second CC, and transmits control information for the beam report on the first UL channel. The control information for the beam report transmitted on the second CC includes information indicating the CC in which the event for the beam report is detected. For example, the control information for the beam report transmitted on the second CC may include information indicating the first CC. That is, the terminal may transmit control information for the beam report based on a cross-carrier scheme.

[0258] In step S1905, the terminal receives a DCI. The DCI may include information for allocating resources for a second UL channel on the CC on which the first UL channel was transmitted, the CC on which an event for a beam report was detected, or the CC on which the DCI was received.

[0259] In step S1907, the terminal transmits a beam report based on the DCI. The beam report includes information indicating a CC where an event for the beam report is detected. That is, the terminal generates information on quality values ​​for reference signals received from the first CC and generates a beam report including the generated information. At this time, the terminal can generate the beam report based on a configuration for a report signaled in advance. The terminal can transmit the beam report through a second UL channel on the CC indicated by the DCI. For example, the terminal can transmit the beam report on the second UL channel of the first CC or the second UL channel of the second CC indicated by the DCI.

[0260]

[0261] [Example #7]

[0262] In the procedure according to FIG. 13 and Mode B, when there is no available first UL channel, the terminal may transmit the first UL channel through a UL channel allocated to another CC. In the first UL channel, indication information regarding a UL resource to be used as a second UL channel among pre-configured UL resources may be transmitted. At this time, if resources that can be used as the second UL channel are allocated to multiple CCs, the first UL channel may include indication information regarding a CC to indicate which of the multiple UL resources is to be used as the second UL channel. In addition, if multiple UL resources that can be used as the second UL channel are configured or allocated within one CC, the first UL channel may include indication information regarding which of the multiple resources is to be used. That is, the first UL channel may include indication information indicating that a specific UL resource is to be used as the second UL channel, and the indication information may indicate a specific CC and one UL resource to be used among the multiple UL resources within the CC.

[0263] FIG. 20 illustrates an example of a procedure for transmitting a cross-carrier beam report in a wireless communication system according to one embodiment of the present disclosure. FIG. 19 illustrates an operating method of a terminal.

[0264] Referring to Figure 20, at step S2001, the terminal detects an event for a beam report from the first CC. The conditions for the event for the beam report can be configured in advance through upper-layer signaling. At this time, the conditions for the event can be configured on a per-CC basis or in a CC-common manner. That is, the terminal determines whether the conditions for the event are satisfied based on the reference signal received from the first CC.

[0265] In step S2003, the terminal transmits control information on the second CC. After an event for a beam report is detected on the first CC, if there is no first UL channel available on the first CC, the terminal determines the first UL channel based on the UL channel allocated on the second CC, which is another CC, and transmits control information for the beam report on the first UL channel. The control information for the beam report transmitted on the second CC may include information indicating the CC to which the second UL channel is allocated or information indicating one of the candidate channels for the second UL channel.

[0266] In step S2005, the terminal transmits a beam report on a second UL channel. The second UL channel may correspond to a CC and candidate channel indicated through control information for the beam report.

[0267]

[0268] [Example #8]

[0269] In the operation of FIG. 12 or FIG. 13, or in the embodiments above, a beam change may be instructed after the base station receives the second UL channel. Alternatively, a configuration related to the TCI state may be modified. That is, if there are operations that are performed under the assumption that the base station has received the second UL channel, such as beam change instructions, TCI state configuration changes, or operations performed by UE-BR event triggering conditions, ambiguity in the operations may occur if a response to the reception of the second UL channel is not transmitted to the terminal. Therefore, after the UE-BR, the base station may transmit indication information or feedback information through DCI that it has received beam-related information through the second UL channel. For this purpose, a specific bit field in the DCI may be reused, or a newly defined field may be used. Alternatively, the base station may configure a specific RNTI and indicate the matter through CRC masking. Alternatively, the base station may implicitly indicate that it has received the second UL channel by using the location of the PDCCH transmission resource, etc.

[0270] In other words, after transmitting a beam report to the base station, the terminal can receive indication information from the base station indicating that the beam report has been received. At this time, the indication information can be signaled by at least one of a bit field within the DCI, CRC masking applied to the DCI, or the location of a resource to which the DCI is mapped.

[0271]

[0272] [Example #9]

[0273] According to embodiments #2 to #8 described with reference to FIGS. 12 and 13, a second UL channel is transmitted after the first UL channel is transmitted, and the reported beam information is transmitted on the second UL channel. According to another embodiment, instead of UE-BR using two UL channels, UE-BR operation using one UL channel, as in FIG. 21, is possible.

[0274] The UE-BR operation using one UL channel is configured to trigger the UE-BR when the triggering condition set for the UE-BR is satisfied, similar to the UE-BR operation described with reference to FIGS. 12 and 13, and then transmit a report on the measured beam information through one UL channel.

[0275] FIG. 21 illustrates a third example of a procedure for UE-BR in a wireless communication system according to an embodiment of the present disclosure. Referring to FIG. 21 , in step S2101, a terminal (2110) transmits a UL channel for beam reporting to a base station (2120). The UL channel may include a PUCCH or PUSCH as a pre-configured UL channel. Here, the pre-configured PUCCH or PUSCH may be a channel allocated as a dedicated UL channel for UE-BR.

[0276] A report transmitted on an UL channel may include indication information indicating that the corresponding UL channel is a UL channel for UE-BR. In addition, the report transmitted on the UL channel may include information about a measured beam. The indication information indicating that the corresponding UL channel is a UL channel for UE-BR may be signaled explicitly through specific bit(s). Alternatively, the indication information indicating that the corresponding UL channel is a UL channel for UE-BR may be signaled by CRC masking using a specific RNTI. Alternatively, the indication information indicating that the corresponding UL channel is a UL channel for UE-BR may be signaled implicitly by reusing an existing bit field.

[0277] FIG. 22 illustrates an example of a procedure for transmitting a beam report in a wireless communication system according to an embodiment of the present disclosure. FIG. 22 also illustrates an operating method of a terminal.

[0278] Referring to FIG. 22, at step S2201, the terminal detects an event for beam reporting. The event for beam reporting is a triggering event and can be defined based on a measurement value for a reference signal. That is, the terminal performs a measurement for at least one reference signal and determines that the measurement result satisfies the event condition. Here, the event condition can be configured by upper layer signaling.

[0279] In step S2203, the terminal transmits a beam report. The terminal transmits a report on beam information in response to the detection of an event for beam reporting. The report on beam information may include indication information indicating that the corresponding UL channel is a UL channel for beam reporting and information on the measured beam.

[0280]

[0281] (Embodiment #9-1) In Embodiment #4, if only the first UL channel can be transmitted using the pre-configured UL resources after UE-BR triggering, the terminal may transmit only the first UL channel to the base station without stopping the UE-BR operation. If beam information can be transmitted on the first UL channel, the terminal may transmit a beam report through the first UL channel. For example, the first UL channel determined to be available within a time offset configured by the base station from the time when the beam report event is detected may not be a channel that can carry a relatively small amount of data, such as PUCCH format 0 or 1. In this case, the terminal may transmit beam information and indication information for reporting beam information for UE-BR together through the first UL channel, without distinguishing between the first UL channel and the second UL channel.

[0282] (Example #9-2) When performing UE-BR using one UL channel as in Fig. 21, if there is no pre-configured UL channel available for beam information reporting within a specific time offset after UE-BR is triggered, the terminal may stop the UE-BR operation. At this time, the value of the time offset may be configured by a combination of one or more of upper layer signaling such as RRC, MAC-CE, or DCI. In addition, the value of the time offset may be determined based on the time point when UE-BR is triggered.

[0283] (Example #9-3) If there is no pre-configured UL channel available for beam information reporting within a specific time offset after UE-BR is triggered in FIG. 21, the base station and / or the terminal may change to an operation mode such as Mode A and perform UE-BR according to the changed operation mode. For example, if there is no pre-configured UL channel for beam reporting as in FIG. 21, but a PUCCH resource for performing SR in Mode A operation is pre-configured, the terminal may transmit SR using the pre-configured PUCCH resource. The base station may allocate a second UL channel using DCI in response to receiving the SR. At this time, the terminal may perform UE-BR using the second UL channel allocated using the DCI. That is, the terminal may perform beam reporting on the second UL channel indicated by the DCI.

[0284] (Example #9-4) In FIG. 21, although there is no pre-configured UL channel available for beam information reporting within a certain time offset after UE-BR is triggered, there may be a pre-configured PUCCH capable of transmitting a small amount of information, such as SR. In this case, the UE may transmit indication information to the base station, notifying that a situation has occurred that satisfies the triggering condition through the pre-configured PUCCH, or notifying that there are no pre-configured resources for beam information reporting, without stopping the UE-BR operation. Accordingly, a procedure as in FIG. 21 may be performed.

[0285] For example, when notifying that a situation satisfying a triggering condition has occurred, if the triggering condition of UE-BR is that there is a beam with better quality than the current beam, the terminal can transmit indication information to the base station notifying that the use of a beam with better quality than the current beam is possible due to UL channel transmission. In this case, the base station can control to perform a NW-initiated beam reporting operation or control to perform the UE-BR operation again.

[0286] As another example, if information indicated via the UL channel indicates that there are no pre-configured resources available for beam information transmission, the base station may change its operating mode to Mode A and allocate a UL channel for beam information transmission via DCI. The change to Mode A may be understood as an operation according to embodiment #9-3.

[0287]

[0288] The operations of the method according to the present disclosure can be implemented as a computer-readable program or code on a computer-readable recording medium. A computer-readable recording medium includes any type of recording device that stores information readable by a computer system. Furthermore, a computer-readable recording medium can be distributed across network-connected computer systems, allowing the computer-readable program or code to be stored and executed in a distributed manner.

[0289] Additionally, the computer-readable recording medium may include hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, etc. The program instructions may include not only machine language codes produced by a compiler, but also high-level language codes that can be executed by a computer using an interpreter, etc.

[0290] While some aspects of the present disclosure have been described in the context of a device, they may also represent a description of a corresponding method, wherein a block or device corresponds to a method step or a feature of a method step. Similarly, aspects described in the context of a method may also be described as a corresponding block or item or a feature of a corresponding device. Some or all of the method steps may be performed by (or using) a hardware device, such as, for example, a microprocessor, a programmable computer, or an electronic circuit. In some embodiments, at least one or more of the most significant method steps may be performed by such a device.

[0291] A programmable logic device (e.g., a field-programmable gate array) may be used to perform some or all of the functions of the methods described in the present disclosure. The field-programmable gate array may operate in conjunction with a microprocessor to perform one of the methods described in the present disclosure. In general, the methods are preferably performed by some hardware device.

[0292] Although the present disclosure has been described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various modifications and changes may be made to the present disclosure without departing from the spirit and scope of the present disclosure as set forth in the claims below.

Claims

1. In a method of operating a terminal in a wireless communication system, A step for detecting an event for UE-BR (user equipment-initiated / event-driven beam report); In response to detection of the above event, transmitting control information for beam reporting on a first UL (uplink) channel; and A step of transmitting the beam report on a second UL channel corresponding to the control information, Control information for the beam report includes a request for resource allocation for the beam report or a notification for transmission of the beam report, A method wherein the first UL channel and the second UL channel are used based on at least one time offset configured by the base station.

2. In claim 1, A method wherein the first UL channel includes a PUCCH resource located within a first time offset from the time at which the event is detected among PUCCH resources pre-configured as candidate channels for the first UL channel.

3. In claim 2, The above first time offset is used as a condition for determining whether to stop the beam report, The above condition is defined such that the beam reporting is stopped if the pre-configured PUCCH resources do not exist within the first time offset from the time at which the event is detected.

4. In claim 1, The first UL channel includes an available PUSCH allocated within a first time offset from the time at which the event is detected, A method in which control information for the above beam report is multiplexed with uplink data on the available PUSCH.

5. In claim 4, The above first time offset is used as a condition for determining whether to stop the beam report, The above condition is defined such that the beam reporting is stopped if the available PUSCH resource does not exist within the first time offset from the time at which the event is detected.

6. In claim 1, In response to the transmission of the first UL channel, a step of initializing a timer for a second time offset; A method further comprising the step of retransmitting the first UL channel if DCI (downlink control information) is not received from the base station before the timer expires.

7. In claim 1, The first UL channel and the second UL channel are transmitted within a third time offset configured by the base station from the time at which the event is detected, The above third time offset is used as a condition for determining whether to stop the beam report, The method is defined such that the beam reporting is stopped if the first UL channel or the second UL channel is not transmitted within the third time offset from the time at which the event is detected.

8. In claim 1, The second UL channel is transmitted within a fourth time offset configured by the base station from the time at which the first UL channel is transmitted, The above fourth time offset is used as a condition for determining whether to stop the beam report, The above condition is defined such that the beam reporting is stopped if the second UL channel is not transmitted within the fourth time offset from the time at which the first UL channel is transmitted.

9. In claim 1, A method further comprising the step of receiving an instruction for performing an NW-initiated beam reporting operation or re-performing the UE-BR from the base station when the first channel is available without any resources available as the second UL, and the control information for the beam reporting implicitly or explicitly signals that a beam of better quality than the current beam is available.

10. In claim 1, A method further comprising the step of receiving a DCI allocating the second UL resource from the base station if the control information for the beam report includes information indicating that there is no pre-configured UL resource for the second UL channel.

11. In claim 1, The above event is detected in the first CC (component carrier), The above first UL channel includes a channel allocated from the second CC, A method in which the second UL channel is allocated using DCI in the first CC or the second CC.

12. In claim 11, A method wherein the control information for the beam report or the beam report includes information indicating the first CC.

13. In claim 1, The above event is detected in the first CC, The above first UL channel includes a channel allocated from the second CC, A method wherein the control information for the beam report includes at least one of information indicating a CC to which the second UL channel is assigned or information indicating one of candidate channels for the second UL channel.

14. In claim 1, Further comprising a step of receiving information indicating reception of the beam report from the base station, A method wherein the above information is signaled by at least one of a bit field within the DCI, CRC masking applied to the DCI, or the location of a resource to which the DCI is mapped.

15. In claim 1, The above second UL channel is, The earliest available UL channel in time from the time point at which control information for the beam report is transmitted among the above pre-configured UL channels, or A method comprising: including the first available UL channel after a predefined number of symbols on the time axis from the time at which control information for the beam report is transmitted among the pre-configured UL channels.

16. In claim 1, The above first UL channel includes a PUSCH (physical uplink shared channel), A method in which control information for the above beam report is multiplexed with uplink data on the PUSCH.

17. In a method of operating a base station in a wireless communication system, A step of receiving control information for beam reporting according to detection of an event for UE-BR (user equipment-initiated / event-driven beam report) of a terminal on a first UL (uplink) channel; and A step of receiving the beam report in a second UL channel corresponding to the control information, Control information for the beam report includes a request for resource allocation for the beam report or a notification for transmission of the beam report, A method wherein the first UL channel and the second UL channel are used based on at least one time offset configured by the base station.

18. In a wireless communication system, at a terminal, At least one transmitter / receiver; at least one processor; and At least one memory operably connected to said at least one processor and storing instructions that, when executed by said processor, control said terminal to perform operations; The above actions are, A step for detecting an event for UE-BR (user equipment-initiated / event-driven beam report); In response to detection of the above event, transmitting control information for beam reporting on a first UL (uplink) channel; and A step of transmitting the beam report on a second UL channel corresponding to the control information, Control information for the beam report includes a request for resource allocation for the beam report or a notification for transmission of the beam report, A terminal in which the first UL channel and the second UL channel are used based on at least one time offset configured by the base station.

19. In a base station in a wireless communication system, At least one transmitter / receiver; at least one processor; and At least one memory operably connected to said at least one processor and storing instructions that, when executed by said processor, control said base station to perform operations; The above actions are, A step of receiving control information for beam reporting according to detection of an event for UE-BR (user equipment-initiated / event-driven beam report) of a terminal on a first UL (uplink) channel; and A step of receiving the beam report in a second UL channel corresponding to the control information, Control information for the beam report includes a request for resource allocation for the beam report or a notification for transmission of the beam report, A base station, wherein the first UL channel and the second UL channel are used based on at least one time offset configured by the base station.

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