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, wherein the control information about the beam report includes a request for resource allocation for the second UL channel or a notification about the use of the second UL channel, and the control information about the beam report further includes indication information for distinguishing the request for resource allocation and the notification.

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 transmitting control information indicating a resource allocation request or a channel usage notification for beam reporting in a wireless communication system.

[0012] The present disclosure may provide a method and apparatus for transmitting control information indicating an operation mode for a UE-BR in a wireless communication system.

[0013] The present disclosure may provide a method and device for transmitting control information using PUCCH (physical uplink control channel) format 0 or PUCCH format 1 in a wireless communication system.

[0014] 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.

[0015] 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 second UL channel or a notification for use of the second UL channel, and the control information for the beam report may further include instruction information for distinguishing the request for resource allocation and the notification.

[0016] 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) 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 second UL channel or a notification for use of the second UL channel, and the control information for the beam report may further include instruction information for distinguishing the request for resource allocation and the notification.

[0017] 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; 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 second UL channel or a notification for use of the second UL channel, and the control information for the beam report may further include instruction information for distinguishing the request for resource allocation and the notification.

[0018] 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) on a first uplink (UL) channel; 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 second UL channel or a notification for use of the second UL channel, and the control information for the beam report may further include instruction information for distinguishing the request for resource allocation and the notification.

[0019] The proposed technology enables efficient performance of UE-initiated / event-driven beam reporting in wireless communication systems.

[0020] 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.

[0021] FIG. 1 illustrates a communication system according to an embodiment of the present disclosure.

[0022] FIG. 2 illustrates a block diagram of a communication node according to an embodiment of the present disclosure.

[0023] FIG. 3 illustrates a block diagram of a wireless device according to an embodiment of the present disclosure.

[0024] 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.

[0025] FIG. 5 illustrates an example of a system frame in a wireless communication system according to an embodiment of the present disclosure.

[0026] FIG. 6 illustrates an example of a subframe in a wireless communication system according to an embodiment of the present disclosure.

[0027] FIG. 7 illustrates an example of a slot in a wireless communication system according to an embodiment of the present disclosure.

[0028] FIG. 8 illustrates the structure of time-frequency resources in a wireless communication system according to an embodiment of the present disclosure.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] FIG. 16 illustrates an example of a procedure for transmitting a beam report based on a UE-BR operation mode in a wireless communication system according to one embodiment of the present disclosure.

[0037] FIG. 17 illustrates an example of a procedure for receiving a beam report based on a UE-BR operation mode in a wireless communication system according to one embodiment of the present disclosure.

[0038] 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.

[0039] 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.

[0040] 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.”

[0041] 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.”

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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)).

[0049] 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.”

[0050] 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.

[0051] FIG. 1 illustrates a communication system according to an embodiment of the present disclosure.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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).

[0056] 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).

[0057] 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.

[0058] 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.

[0059] 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).

[0060] 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.

[0061] 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).

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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).

[0069] 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.

[0070] 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).

[0071] 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).

[0072] 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).

[0073] 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).

[0074] 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).

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] FIG. 5 illustrates an example of a system frame in a wireless communication system according to an embodiment of the present disclosure.

[0084] 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.

[0085] 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."

[0086] FIG. 6 illustrates an example of a subframe in a wireless communication system according to an embodiment of the present disclosure.

[0087] 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.

[0088] FIG. 7 illustrates an example of a slot in a wireless communication system according to an embodiment of the present disclosure.

[0089] 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.

[0090] 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].

[0091] 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

[0092] 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.

[0093] 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.

[0094] 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."

[0095] 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.

[0096] 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.

[0097] FIG. 8 illustrates the structure of time-frequency resources in a wireless communication system according to an embodiment of the present disclosure.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] 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).

[0103] 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.

[0104] 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).

[0105] 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.

[0106] 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.

[0107] 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:

[0108] 1) Beam determination

[0109] 2) Beam measurement

[0110] 3) Beam reporting

[0111] 4) Beam sweeping

[0112] 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).

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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).

[0117] 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.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] 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.

[0123] At this time, there are three main methods for setting the status of TCI for DL ​​channels and UL channels.

[0124] A. Joint TCI state indication method that is commonly indicated to DL / UL channels

[0125] B. DL channel separate TCI state indication method for setting TCI separately for DL ​​channel and

[0126] C. UL Channel Separate TCI State Indication Method

[0127] 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.

[0128] 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.

[0129] 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:

[0130]

[0131]

[0132]

[0133]

[0134]

[0135]

[0136]

[0137]

[0138]

[0139]

[0140]

[0141]

[0142]

[0143] 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:

[0144] - typeA: {Doppler shift, Doppler spread, average delay, delay spread}

[0145] - typeB: {Doppler shift, Doppler spread}

[0146] - typeC: {Doppler shift, average delay}

[0147] - typeD: {Spatial Rx parameter}

[0148] 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.

[0149] 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.

[0150] 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'.

[0151] 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.

[0152] 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.

[0153] 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.

[0154] 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.

[0155] 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.

[0156] 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.

[0157] 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.

[0158] 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.

[0159] 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.

[0160] 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.

[0161] 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.

[0162] 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.

[0163] 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.

[0164] 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.

[0165] 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.

[0166] 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).

[0167] 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.

[0168] 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.

[0169] 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.

[0170] 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.

[0171] 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.

[0172] 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.

[0173] 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.

[0174] 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.

[0175] 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.

[0176]

[0177] 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.

[0178]

[0179] 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.

[0180] 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 PUCCH 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 PUCCH. 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.

[0181] 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 PUCCH 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 PUCCH. Here, the control information may include a notification for the 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.

[0182] 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, the first PUCCH may be used to transmit a scheduling request (SR) requesting UL resource allocation for UE-BR. 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 terminal performs UE-BR using the corresponding 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 terminal will use the pre-configured second UL channel for UE-BR. Thereafter, the terminal performs UE-BR using the corresponding second UL channel. At this time, the second UL channel may include a PUCCH or a PUSCH.

[0183] As mentioned above, PUCCH can be used for SR or notification for UE-BR operation. For example, format 0 and PUCCH format 1 can be used for SR or notification for UE-BR operation. Therefore, a specific method for transmitting SR or notification for UE-BR via PUCCH needs to be defined.

[0184]

[0185] 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.

[0186] 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.

[0187] 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. The control information is transmitted via a first UL channel. The first UL channel includes a PUCCH. The control information may be transmitted based on PUCCH format 0 or PUCCH format 1. According to various embodiments, the control information may include a request for resource allocation for a second UL channel or a notification for use of the second UL channel. The control information may further include indication information for distinguishing the request for resource allocation for the second UL channel or the notification for use of the second UL channel. For example, the indication information may indicate whether the operation mode for the UE-BR of the terminal is mode A for requesting resource allocation for the second UL channel or mode B for notifying use of the second UL channel. When the control information includes indication information for requesting resource allocation for the second UL channel, the control information may further include information indicating the amount of data for the beam to be reported or the amount of required resources. Control information can be multiplexed with HARQ-ACK / NACK information. The control information can be generated and transmitted as described in embodiments #1 to #6 described below.

[0188] 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. For example, when the terminal operates according to mode A, the second UL channel may include a channel indicated by DCI received from the base station in response to the control information for the beam report. As another example, when the terminal operates according to mode B, the second UL channel may include a channel notified to the base station to be used as the second UL channel using the control information for the beam report among the pre-configured channels.

[0189]

[0190] 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.

[0191] 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 via a first UL channel. The first UL channel may include a PUCCH. The control information may be received based on PUCCH format 0 or PUCCH format 1. According to various embodiments, the control information may include a request for resource allocation for a second UL channel or a notification for use of the second UL channel. The control information may further include indication information for distinguishing the request for resource allocation for the second UL channel or the notification for use of the second UL channel. For example, the indication information may indicate whether the operation mode for the UE-BR of the terminal is Mode A, which requests resource allocation for the second UL channel, or Mode B, which notifies use of the second UL channel. If the control information includes indication information requesting resource allocation for a second UL channel, the control information may further include information indicating an amount of data for a beam to be reported or an amount of required resources. The control information may be multiplexed with HARQ-ACK / NACK information. The control information may be received by the base station by being generated and transmitted as described in embodiments #1 to #6 described below. If it is determined that the control information includes a request for resource allocation for the second UL channel, the base station may transmit a DCI allocating the second UL channel to the terminal. If it is determined that the control information further includes information indicating an amount of data for the beam to be reported or an amount of required resources, the base station may allocate the second UL channel to the terminal in consideration of the information indicating an amount of data for the beam to be reported or an amount of required resources.

[0192] In step S1503, the base station receives a beam report. The base station may receive the beam report via 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. For example, the second UL channel may include a channel indicated by a DCI transmitted to a terminal in response to the control information for the beam report. As another example, the second UL channel may include a channel notified to the base station to be used as the second UL channel through the control information for the beam report among the channels pre-configured by the base station.

[0193]

[0194] [Operation method using PUCCH format 0 in the first PUCCH transmission for UE-BR]

[0195] In the case of PUCCH format 0, a terminal can transmit SR and up to 2-bit HARQ-ACK / NACK. To transmit the information, the terminal selectively transmits a sequence mapped to specific information among a plurality of orthogonal sequences or quasi-orthogonal sequences generated based on a base sequence set for each cell. The plurality of orthogonal sequences or quasi-orthogonal sequences can be generated by phase rotating the base sequence in the frequency domain. Alternatively, the plurality of orthogonal sequences or quasi-orthogonal sequences can be generated by cyclic shifting the base sequence in the time domain. The base sequence configured for each cell can be determined by a specific ID value set by a base station and a slot position for performing transmission of the corresponding sequence.

[0196] Embodiments #1 to #3 described below are examples of how PUCCH format 0 is exclusively allocated for UE-BR. Embodiment #4 is an example of how PUCCH format 0, which is configured for use in existing SR and HARQ-ACK / NACK transmission, is used for UE-BR.

[0197] When PUCCH format 0 for UE-BR is exclusively allocated, it may mean that the time-frequency resources of PUCCH for UE-BR are allocated separately from the PUCCH time-frequency resources for existing UCI transmission. Alternatively, when PUCCH format 0 for UE-BR is exclusively allocated, it may mean that base sequences and phase rotation values ​​used for PUCCH format 0 for UE-BR are allocated to UEs separately from the base sequences and phase rotation values ​​used for PUCCH format 0 for existing UCI transmission. In this case, when PUCCH format 0 for UE-BR is exclusively allocated, it may mean that the existing UCI transmission and the first PUCCH transmission for UE-BR can be distinguished by the use of different base sequences and phase rotation values ​​in the same PUCCH format 0 transmission resource region.

[0198] When PUCCH format 0 is exclusively allocated and the first PUCCH transmission is performed using the PUCCH format 0, the base station can know that the UE-BR operation has started.

[0199] In the operation of FIG. 12 or FIG. 13, the base station must be able to make a decision on whether to allocate a second UL channel using DCI transmission or not after receiving at least the first UL channel, i.e., the first PUCCH. Accordingly, information indicating whether the second UL channel allocation using DCI is necessary, i.e., operation in Mode A or Mode B, must be transmitted via the first PUCCH.

[0200]

[0201] [Example #1] When PUCCH format 0 is allocated exclusively for UE-BR, operation mode indication

[0202] Information indicating whether the terminal transmitted PUCCH format 0 for mode A operation or PUCCH format 0 for mode B operation may be transmitted through the corresponding PUCCH format 0. That is, the terminal may request allocation of a second UL channel through DCI through PUCCH format 0 transmission, as in mode A operation, or may notify the base station that it uses preconfigured UL resources as the second UL channel, as in mode B operation.

[0203] Mode A: SR Mode B: Notification phase rotation value [rad]

[0204] [Table 3] shows the phase rotation values ​​applied to indicate whether PUCCH format 0 is for Mode A operation, i.e., a request for SR, or Mode B operation, i.e., a notification to use pre-configured UL resources as a second UL channel. The unit of the phase rotation values ​​is radians. [Table 3] shows the full phase range Here is an example where two phase rotation values ​​are set to be the furthest apart from each other. That is, the phase rotation value for the instruction to SR is On the other hand, to The phase rotation value added is used as the phase rotation value defined for the notification instruction. In the example of [Table 3], the two phase rotation values ​​are , that is, it is set to differ by 180 degrees, but according to other embodiments, the difference value of the two phase rotation values ​​can be set and operated as a different value. In addition, the value of X in [Table 3] can also be set and operated as a specific value.

[0205] [Table 3] is an example of a case where two operating modes are used for UE-BR. Even when there are three or more operating modes for UE-BR, operation as in [Table 4] is possible by using different phase rotation values.

[0206] When UE-BR operation is 3, when UE-BR operation is 4, phase rotation value set [rad]

[0207] [Table 4] is an example showing phase rotation values ​​to be applied to the base sequence to indicate each mode through PUCCH format 0 when three or four modes for UE-BR operation are defined. For convenience of explanation, three modes are referred to as mode A, mode B, and mode C, and four modes are referred to as mode A, mode B, mode C, and mode D. As shown in [Table 4], when three modes are defined, each phase rotation value is the closest phase rotation value to each other. , that is, it is defined to have a difference of 120 degrees. When four modes are defined, each phase rotation value is different from the nearest phase rotation value. , that is, it is defined to have a 90 degree difference. The example in [Table 4] is an example in which the phase rotation values ​​are set to be the furthest apart from each other. However, the difference between the phase rotation values ​​can be set and operated to a different value. In addition, the value of X in [Table 4] can also be set and operated to a specific value.

[0208] Unlike the examples in [Table 3] and [Table 4], indications for multiple modes can be expressed using different basis sequences in addition to phase rotation values. Alternatively, indications for multiple modes can be expressed by a combination of phase rotation values ​​and different basis sequences.

[0209] Mode A: SR Mode B: Notification phase rotation value [rad] Basis sequence #1 Basis sequence #2

[0210] Mode A Mode B Mode C Mode D Indicator Combination Basis Sequence #1 with Phase Rotation Basis Sequence #1 with Phase Rotation Basis Sequence #2 with Phase Rotation Basis Sequence #21 with Phase Rotation

[0211] [Table 3] is an example of generating a sequence to indicate Mode A or Mode B by applying different phase rotation values ​​to the same base sequence. On the other hand, [Table 5] is an example of distinguishing Mode A and Mode B by using different base sequences (e.g., base sequence #1 and base sequence #2). [Table 6] is an example of distinguishing and indicating four modes corresponding to different UE-BR operations based on different combinations of base sequences and phase rotation values. In [Table 6], Mode A and Mode B are distinguished by applying different phase rotation values ​​to the same base sequence (e.g., base sequence #1). In addition, Mode C and Mode D are distinguished by applying different phase rotation values ​​to the same base sequence (e.g., base sequence #2). Therefore, Mode A / B and Mode C / D can be distinguished by using different base sequences.

[0212] In [Table 5] and [Table 6], the basis sequences can be orthogonal or quasi-orthogonal to each other. In addition, the difference values ​​of the phase rotation values ​​can be set and operated as different values. In [Table 5] and [Table 6], the values ​​of X and Y can also be set and operated as specific values.

[0213]

[0214] [Example #2] If PUCCH format 0 is allocated exclusively for UE-BR, the combination of operation mode and UCI is indicated.

[0215] According to embodiment #1, only the indication information for distinguishing the mode for UE-BR operation is transmitted using PUCCH format 0. Using PUCCH format 0, the indication information for the operation mode and the UCI for HARQ-ACK / NACK can be multiplexed. That is, if there is ACK / NACK information to be transmitted by the UE along with the first PUCCH transmission for performing UE-BR operation, these can be multiplexed and transmitted together.

[0216] For example, when multiplexing instruction information distinguishing between Mode A and Mode B and 1-bit HARQ ACK or NACK, the terminal can generate and transmit a sequence in the manner shown in [Table 7] below.

[0217] Information to be transmitted Sequence Mapping Mode A Operation Instruction and ACK Base Sequence with Phase Rotation Mode A operation instructions and NACK basis sequence with phase rotation Mode B operation instructions and ACK base sequence with phase rotation Mode B operation instructions and NACK basis sequence with phase rotation

[0218] In [Table 7], the number of combinations of mode indication information and ACK or NACK multiplexing in each operation is 4. Therefore, in order to generate different sequences for the 4 combinations, 4 sequences can be defined by adapting a phase rotation of π / 2 intervals to the same base sequence. For example, when multiplexing ACK while indicating SR with mode A operation, a base sequence that is phase rotated by X can be transmitted. In the example of [Table 7], the difference values ​​of the phase rotation values ​​can be set and operated to different values, and the value of X can also be set and operated to a specific value.

[0219] For example, when multiplexing instruction information distinguishing between Mode A and Mode B and 2-bit HARQ ACK or NACK, a sequence can be generated and transmitted in a manner as shown in [Table 8] below.

[0220] Information to be transmitted Sequence Mapping Mode A Operation Instruction and (ACK, ACK) Base Sequence with Phase Rotation Mode A operation instructions and (ACK, NACK) basis sequences with phase rotation Mode A operation instructions and (NACK, ACK) basis sequences with phase rotation Mode A operation instructions and (NACK, NACK) basis sequence with phase rotation Mode B operation instructions and (ACK, ACK) basis sequence with phase rotation Mode B operation instructions and (ACK, NACK) basis sequences with phase rotation Mode B operation instructions and (NACK, ACK) basis sequences with phase rotation Mode B operation instructions and (NACK, NACK) basis sequence with phase rotation

[0221] In [Table 8], the number of combinations of mode indication information and multiplexing for 2-bit ACK or NACK is 8. Therefore, for the generation of different sequences for the 8 combinations, for the same base sequence, We define four sequences through the phase rotation of the interval, and for each sequence By applying a phase rotation of (30 degrees), four more sequences can be defined, for a total of eight sequences. For example, when multiplexing the indication information indicating Mode B and (ACK, NACK), The basis sequence is rotated by the phase A sequence generated by additional phase rotation can be transmitted.

[0222] In the case of [Table 7] or [Table 8], phase-rotated sequences are defined by different phase rotation values ​​using one basis sequence, but different sequences can be defined by different combinations of basis sequences and phase rotation values.

[0223] Information to be transmitted Sequence Mapping Mode A Operation Instruction and (ACK, ACK) Base Sequence #1 with Phase Rotation Mode A operation instructions and (ACK, NACK) base sequence #1 with phase rotation Mode A operation instructions and (NACK, ACK) base sequence #1 with phase rotation Mode A operation instruction and (NACK, NACK) basis sequence #1 with phase rotation Mode B Operation Instructions and (ACK, ACK) Base Sequence #2 with Phase Rotation Mode B Operation Instructions and (ACK, NACK) Base Sequence #2 with Phase Rotation Mode B Operation Instructions and (NACK, ACK) Base Sequence #2 with Phase Rotation Mode B operation instructions and (NACK, NACK) basis sequence #2 with phase rotation

[0224] In [Table 9], the number of combinations of multiplexing for mode A or mode B operation and 2-bit ACK or NACK is 8. Therefore, in order to define different sequences for the 8 combinations, for each of the two base sequences (e.g., base sequence #1 and base sequence #2) By applying the phase rotation of the interval, a total of eight sequences can be defined. For example, when multiplexing information indicating mode B operation and (ACK, NACK), base sequence #2 A sequence generated by rotating the phase by that amount can be transmitted.

[0225] In the above [Table 7], [Table 8], and [Table 9], the difference values ​​between adjacent phase rotation values ​​can be set and operated as different values, and the value of X can also be set and operated as a specific value.

[0226]

[0227] [Example #3] When PUCCH format 0 is allocated exclusively for UE-BR, the operation mode and resource amount are indicated together.

[0228] When transmitting PUCCH format 0 in Mode A, information indicating the amount of data for the beam to be reported or the amount of resources required may be transmitted together. The base station can set and operate the number of beams to be reported as the number N. Therefore, when allocating UL resources using DCI in Mode A operation, the base station can allocate resources by considering the value N, which is the number of beams to be reported. However, the actual number of beams to be reported may be less than N. In this case, if the amount of allocated resources is determined assuming that N beams, which are the maximum size, are reported, resource efficiency may be reduced.

[0229] Information to be transmitted Sequence Mapping Mode A Operation Instructions and Number of beams to be reported is less than or equal to N / 2 Basis Sequence with Phase Rotation Mode A operation instructions and reporting when the number of beams is greater than N / 2, basis sequence with phase rotation Mode B operating basis sequence with phase rotation

[0230] Information to be transmitted Sequence Mapping Mode A Operation Instructions and Number of beams to report is less than or equal to N / 3 Basis sequence with phase rotation Mode A operation instructions and reporting when the number of beams is greater than N / 3 and less than or equal to 2N / 3, basis sequence with phase rotation Mode A operation instructions and reporting beams greater than 2N / 3 basis sequence with phase rotation Mode B operating basis sequence with phase rotation

[0231] [Table 10] and [Table 11] are examples of dividing the amount of beam information to be reported in Mode A into 2-step and 3-step information indications. In [Table 10] and [Table 11], information is classified based on the number of beams to be reported, but information can be classified based on the amount of resources to be allocated or the amount of data to be reported, rather than the number of beams to be reported. In other words, the sequence can be used to inform the base station of the amount of resources required for UL resource allocation.

[0232] In [Table 10], sequences are required for a total of three combinations, including instructions for Mode A operation, two combinations for cases where the number of beams to be reported is less than or equal to N / 2 and greater than N / 2, and instructions for Mode B operation. [Table 10] shows the sequences for each sequence based on the same base sequence. , that is, an example in which sequences are defined to have a phase rotation value difference of 120 degrees.

[0233] In [Table 11], sequences are required for a total of four combinations including instructions for Mode A operation, three combinations for cases where the number of beams to be reported is less than or equal to N / 3, greater than N / 3 and less than or equal to 2N / 3, and greater than 2N / 3, and instructions for Mode B operation. [Table 11] shows the sequences for each sequence based on the same base sequence. , that is, an example of defining sequences to have a phase rotation value difference of 90 degrees.

[0234] In [Table 10] and [Table 11], the difference between adjacent phase rotation values ​​can be set and operated as different values, and the value of X can also be set and operated as a specific value. In addition, as in the example of [Table 6], two or more basis sequences can be used to indicate different modes, and sequences mapped to each combination in [Table 10] or [Table 11] can be generated and operated.

[0235]

[0236] [Example #4] Indication of operation mode using SR when PUCCH format 0 is allocated for UE-BR non-exclusive use

[0237] When HARQ-ACK / NACK of up to 2 bits is multiplexed with SR, indication information can be added to indicate whether the SR is for notification of pre-configured resources during UE-BR operation by applying a specific phase rotation value to each sequence. If the existing SR is used as is, allocation of PUSCH resources can be received, so that operation of Mode A for UE-BR can be performed. However, when transmitting PUCCH format 0 for notification of use of pre-configured resources without DCI for operation of Mode B, a distinction from SR in Mode A operation is required. Therefore, indication information such as that of the present embodiment is required. Therefore, an extension to phase rotation can be applied to enable indication of additional information to PUCCH format 0 used for existing UCI transmission.

[0238] Information to be transmitted Sequence mapping A, A, -SR basis sequence with phase rotation A, N, -SR basis sequence with phase rotation N, A, -SR basis sequence with phase rotation N, N, -SR basis sequence with phase rotation A, A, +SR basis sequence with phase rotation A, N, +SR basis sequence with phase rotation N, A, +SR basis sequences with phase rotation N, N, +SR basis sequence with phase rotation A, A, -SR, Noti. basis sequence with phase rotation A, N, -SR, Noti. basis sequence with phase rotation N, A, -SR, Noti. basis sequence with phase rotation N, N, -SR, Noti. basis sequence with phase rotation

[0239] [Table 12] is an example of sequences for SR or notification for Mode A and Mode B for UE-BR in a situation where 2-bit HARQ-ACK / NACK and SR are multiplexed. In [Table 12], 'A' represents ACK, 'N' represents NACK, '-SR' represents negative SR, '+SR' represents positive SR, and 'Noti.' represents information notifying that pre-configured UL resources are used as a second UL channel through the first PUCCH transmission in Mode B. The corresponding symbols are also used in at least one other table below.

[0240] In [Table 12], positive SR means a conventional UL resource allocation request. However, positive SR can also be used as an SR for a UL resource allocation request via DCI in Mode A for UE-BR.

[0241] A total of 12 combinations are generated by combining four cases of 2-bit ACK / NACK combinations, 3 cases of positive SR, negative SR, and negative SR with notification. [Table 12] is an example of generating 12 sequences corresponding to the 12 combinations by applying different phase rotation values ​​based on the same base sequence. Specifically, in the example of phase rotation used for multiplexing 2-bit ACK / NACK and SR in PUCCH format 0 used for conventional UCI transmission, additional phase rotation values ​​(e.g., , , , and ) was applied.

[0242] Information to be transmitted sequence mapping A, -SR basis sequence with phase rotation N, -SR basis sequence with phase rotation A, +SR basis sequence with phase rotation N, +SR basis sequence with phase rotation A, -SR, signal basis sequence with phase rotation N, -SR, notation basis sequence with phase rotation

[0243] [Table 13] is an example of sequences for SR or notification for Mode A and Mode B for UE-BR in a situation where 1-bit HARQ-ACK / NACK and SR are multiplexed. In [Table 13], positive SR means a conventional UL resource allocation request, but can also be used as an SR for a UL resource allocation request via DCI in Mode A.

[0244] A total of six combinations are generated by combining two cases of 1-bit ACK / NACK, and three cases of positive SR, negative SR, and negative SR with notification. [Table 13] is an example of generating six sequences corresponding to the six combinations by applying different phase rotation values ​​based on the same base sequence. Specifically, in addition to the example of phase rotation used when multiplexing 1-bit ACK / NACK and SR in PUCCH format 0 used for conventional UCI transmission, additional phase rotation values ​​(e.g., , , and ) was applied.

[0245] Mapping of information sequences to be transmitted - SR basis sequences with phase rotation +SR basis sequence with phase rotation -SR, notification basis sequence with phase rotation

[0246] [Table 14] is an example of a sequence generated by applying an additional phase rotation value to additionally indicate the case of a notification while being a negative SR, in addition to an example of phase rotation for transmitting a positive SR or a negative SR using PUCCH format 0. In other words, [Table 14] is an example of a sequence generation method for three combinations.

[0247] Mapping of information sequence to be transmitted - SR (notification) basis sequence with phase rotation +SR basis sequence with phase rotation

[0248] [Table 15] is an example of phase rotation for transmitting positive SR or negative SR using PUCCH format 0, where the case of negative SR is defined for notification purposes. In this case, [Table 15] is an example of sequence generation for two combinations.

[0249] In the examples of [Table 12] to [Table 15], the difference between the phase rotation values ​​can be set and operated as different values. In addition, the value of X can also be set and operated as a specific value. In addition, as in the example of [Table 6], a sequence that maps to each combination can be defined using two or more basis sequences for different instructions.

[0250] When PUCCH format 0 is used as the first PUCCH, which is the first UL channel of UE-BR, it is configured not to be multiplexed with ACK / NACK, and the procedure can be operated based on the sequence mapping as in [Table 14] or [Table 15]. Alternatively, when PUCCH format 0 is used as the first UL channel of UE-BR, only multiplexing with 1-bit HARQ-ACK / NACK is allowed as in [Table 13], and the procedure can be operated based on the sequence mapping as in [Table 13] to [Table 15]. Alternatively, when PUCCH format 0 is used as the first UL channel of UE-BR, multiplexing with 2-bit HARQ-ACK / NACK is allowed, and the procedure can be operated based on the sequence mapping as in [Table 12] to [Table 15]. Here, the target for which multiplexing is allowed can be defined in advance or configured by the base station. For example, the terminal may receive configuration information about the SR for UE-BR or the target for which notification and multiplexing are allowed (e.g., UCI type).

[0251] In the above-described embodiments, even if a notification for UE-BR is transmitted, an SR may be transmitted together. In the above-described examples, the SR transmitted together with the notification was described as a negative SR. However, the SR transmitted together with the notification is a formal SR that is not actually related to a resource request and indicates that a pre-configured resource should be used for beam reporting, and may be referred to as a nominal SR, a pseudo SR, etc.

[0252] In the embodiments described above, at least two embodiments may be used and operated simultaneously for generating various sequences. In this case, in order to avoid mutual ambiguity in the indication information of the same phase rotation value, the information to be transmitted and the sequence mapping method, i.e., the base sequence type, the phase rotation values ​​X, Y, and / or the difference values ​​of the phase rotation values ​​for each sequence mapping may be appropriately modified and changed.

[0253] All embodiments proposed in this disclosure can be operated in a simple application, modification, extension, or combination form with each other.

[0254]

[0255] [Operational method using PUCCH format 1 in the first PUCCH transmission for UE-BR]

[0256] For PUCCH format 1, unlike PUCCH format 0, the terminal can BPSK or QPSK modulate the bits to be transmitted, and multiply the modulated symbols by a specific phase-rotated basis sequence and an orthogonal sequence according to the ID set by the base station and the resource positions of the slots and symbols allocated for PUCCH transmission. PUCCH format 1 can be used to transmit 1-bit or 2-bit information. However, when PUCCH format 1 is used as the first PUCCH for UE-BR, at least information indicating Mode A or Mode B during UE-BR operation must be included. That is, a distinction is required as to whether the first PUCCH transmission is for requesting UL resource allocation via DCI or for notifying that pre-configured resources are used.

[0257] The following embodiment #5 is an example of an operation method when PUCCH format 1 for UE-BR is exclusively allocated. Embodiment #6 is an example of an operation method when PUCCH format 1 allocated for existing SR and HARQ-ACK / NACK transmission is used for UE-BR. In the present disclosure, the case where PUCCH format 1 for UE-BR is exclusively allocated may mean that PUCCH time-frequency resources for UE-BR are allocated separately from PUCCH time-frequency resource allocation for existing UCI transmission. Alternatively, the case where PUCCH format 1 for UE-BR is exclusively allocated may mean that the base sequence, phase rotation value, and orthogonal sequence used for PUCCH format 1 for UE-BR are allocated to the UE separately from the base sequence, phase rotation value, and orthogonal sequence used for PUCCH format 1 for existing UCI transmission. In this case, the fact that PUCCH format 1 for UE-BR is exclusively allocated may mean that the first PUCCH transmission for UE-BR can be distinguished from the existing UCI transmission by using different basis sequences, phase rotation values, and / or orthogonal sequences in the same PUCCH format 1 transmission resource region. When PUCCH format 1 is exclusively allocated, the base station can know that the UE-BR operation has started by transmitting the first PUCCH using the corresponding PUCCH format 1.

[0258]

[0259] [Example #5] When PUCCH format 1 is allocated exclusively for UE-BR

[0260] When PUCCH format 1 is allocated exclusively for UE-BR, 1 bit can be used as an indicator to indicate whether UL resources are allocated via DCI in UE-BR operation. When only 1 bit is transmitted, a signal generated by BPSK modulation can be transmitted in PUCCH format 1. Here, when the UE transmits 1 bit of HARQ-ACK / NACK, by multiplexing 1 bit of indicator information with the HARQ-ACK / NACK, a total of 2 bits can be modulated into a QPSK symbol and transmitted via PUCCH format 1.

[0261] The following multiplexing operations are possible depending on the UE-BR operation mode.

[0262] - In case of UE-BR operation in Mode A, an indicator of whether 1-bit UL resources are allocated and information indicating the amount of data for the beams to be reported or the amount of resources required may be transmitted together. For example, an additional 1-bit indicator may be used to distinguish between cases where the number of beams to be reported is less than or equal to N / 2 and cases where the number of beams to be reported is greater than N / 2. Here, the amount of resources to be allocated or the amount of data to be reported may be used to distinguish the information, rather than the number of beams to be reported. That is, the 1-bit indicator may be used to inform the base station of the amount of resources required for UL resource allocation.

[0263] - In case of UE-BR operation in Mode B, the terminal can multiplex an indicator of whether 1-bit UL resource is allocated and HARQ-ACK / NACK information to be transmitted, modulate a total of 2 bits into a QPSK symbol, and transmit it through PUCCH format 1.

[0264] - As described above, when multiplexing is operated differently for each mode, the base station can confirm the operating mode by decoding the mode indicator information during 2-bit transmission, and can distinguish whether the second bit is HARQ feedback information or information on the amount of resources depending on the operating mode.

[0265] - In the examples described above, even in the case of UE-BR operation in Mode A, the procedure can be operated in a manner of multiplexing a 1-bit UL resource allocation indicator and a 1-bit HARQ-ACK / NACK. That is, in the case of UE-BR operation in Mode A, the UE can multiplex the 1-bit HARQ-ACK / NACK to be transmitted with the indicator on UL resource allocation rather than the indication information on the amount of resources.

[0266]

[0267] [Example #6] When PUCCH format 1 is not dedicated for UE-BR

[0268] If PUCCH format 1 is not exclusively for UE-BR, i.e., if PUCCH format 1 allocated for existing UCI transmission is used as the first PUCCH for UE-BR, the PUCCH format 1 may include at least indication information for operation of Mode B. That is, PUCCH format 1 may include indication information on whether UL resources are allocated. Accordingly, as shown in [Table 16] below, the maximum 2 bits that can be transmitted may be configured to include 1 bit for indication purposes for SR and 1 bit for indicating whether UL resources are allocated via DCI thereafter. That is, as shown in [Table 16] below, a total of 2 bits of indication information may be transmitted using PUCCH format 1.

[0269] Bit combination to be transmitted Information mapped to bit combination 00SR The first bit '0' indicates that resource allocation using DCI is requested for UE-BR, the second bit '1', i.e., '00' indicator means mode A operation 01SR The first bit '0' indicates that resource allocation using DCI for UE-BR is not required, the second bit '1' indicates that it is a simple notification, i.e., '01' indicator means mode B operation 10SR None and HARQ feedback bit 011SR None and HARQ feedback bit 1

[0270] In [Table 16], the two bit combinations of '00' and '01' need to be distinguished from '00' and '01' generated by multiplexing of SR and HARQ feedback bits (e.g., 0 or 1) when the existing PUCCH format 1 is used for UCI purposes. Therefore, when used for UE-BR purposes, at least one of the parameter values ​​applied when transmitting modulation of the existing PUCCH format 1, such as the ID, basis sequence, phase rotation value, and / or orthogonal sequence set by the base station used when transmitting '00' or '01', may be applied differently from the case of the existing UCI transmission. Through this, identification information indicating that it is transmitted for the purpose of UE-BR operation can be signaled. That is, the identification information enables interpretation of the UE-BR operation based on the two bits as in [Table 16].

[0271] Unlike [Table 16], the SR and HARQ feedback bits can be multiplexed through the existing PUCCH format 1, and information indicating that the SR is not a UL resource request by DCI can be implicitly added when the SR is positive. In the existing SR transmission, the positive SR is transmitted to request a UL resource allocation operation. Therefore, the operation of Mode A can be requested using the existing positive SR operation. If notification for the use of pre-configured resources without allocation of UL resources is required, the terminal can transmit a positive SR, but apply parameter values ​​applied to the existing PUCCH format 1 modulation transmission, such as the ID, base sequence, phase rotation value, and / or orthogonal sequence set by the base station, differently from the case of the existing UCI transmission. Through this, the terminal can indicate that the positive SR is not a UL resource request by DCI. That is, by indicating that the positive SR is not a UL resource request by DCI, it can be instructed to notify the use of pre-configured UL resources, such as Mode B, in UE-BR operation.

[0272] The embodiments proposed in this disclosure can be operated in a simple application, modification, extension, or combination form with each other.

[0273]

[0274] FIG. 16 illustrates an example of a procedure for transmitting a beam report based on a UE-BR operation mode in a wireless communication system according to an embodiment of the present disclosure. FIG. 16 illustrates an operation method of a terminal.

[0275] Referring to FIG. 16, in step S1601, the terminal receives configuration information for beam reporting. The configuration information may include control information for the beam report and / or allocation information (e.g., frequency position, slot position, period, offset, etc.) for a plurality of channels that are preconfigured to transmit the beam report. According to one embodiment, the configuration information may further include at least one of a PUCCH format for UE-BR (e.g., PUCCH format 0, PUCCH format 1), whether the corresponding format is dedicated for UE-BR, information on a multiplexing allowance target (e.g., UCI type), a specific ID, a base sequence, a phase rotation value, a difference value between phase rotation values, or the number of beams to be reported.

[0276] In step S1603, the terminal transmits control information according to event detection. The terminal performs measurement on at least one reference signal, determines that the measurement result satisfies the conditions of a pre-configured event, and generates and transmits control information for a beam report. The control information includes indication information indicating an operation mode for the beam report and is transmitted through a first UL channel (e.g., PUCCH). Specifically, the terminal may generate and transmit control information including indication information indicating an operation mode for UE-BR based on PUCCH format 0 or PUCCH format 1. For example, the indication information may indicate either a mode for requesting resource allocation for a second UL channel or a mode for notifying use of the second UL channel. The indication information may be signaled based on at least one of an ID, a basis sequence, a phase rotation value, a difference value between phase rotation values, or an orthogonal sequence. The indication information may be multiplexed with HARQ ACK / NACK based on information about a multiplexing target. Control information may further include information indicating the amount of data for the beam to be reported, or the amount of resources required. The control information may be transmitted on a pre-configured PUCCH. Alternatively, the control information may be transmitted via the PUSCH. In this case, the control information may be multiplexed with uplink data on the PUSCH.

[0277] In step S1605, the terminal determines whether reception of scheduling information is required. Whether reception of scheduling information is required may be determined based on the operation mode for beam reporting. That is, the terminal may determine that reception of scheduling information is required if the operation mode for beam reporting of the terminal is a mode for requesting resource allocation for the second UL channel, and may determine that reception of scheduling information is not required if the operation mode for beam reporting is a mode for notifying the use of the second UL channel.

[0278] If reception of scheduling information is required, the terminal receives scheduling information at step S1607. The terminal may receive scheduling information from the base station in response to transmission of control information for a beam report. At step S1609, the terminal transmits a beam report based on the scheduling information. The terminal may transmit the beam report via the second UL channel indicated by the scheduling information.

[0279] If reception of scheduling information is not required, in step S1611, the terminal transmits a beam report on a pre-configured channel. The terminal may transmit the beam report on a second UL channel notified to the base station using control information. In this case, the second UL channel used to transmit the beam report may include the first available UL channel after a predefined number of symbols on the time axis from the time point at which control information for the beam report is transmitted among the pre-configured UL channels.

[0280]

[0281] FIG. 17 illustrates an example of a procedure for receiving a beam report based on a UE-BR operation mode in a wireless communication system according to an embodiment of the present disclosure. FIG. 17 illustrates an operation method of a terminal.

[0282] Referring to FIG. 17, in step S1701, the base station transmits configuration information for beam reporting. The configuration information may include control information for the beam report and / or allocation information (e.g., frequency position, slot position, period, offset, etc.) for a plurality of channels that are pre-configured for transmitting the beam report. According to one embodiment, the configuration information may further include at least one of a PUCCH format for UE-BR (e.g., PUCCH format 0, PUCCH format 1), whether the corresponding format is dedicated for UE-BR, information on a multiplexing allowance target (e.g., UCI type), a specific ID, a base sequence, a phase rotation value, a difference value between phase rotation values, or the number of beams to be reported.

[0283] In step S1703, the base station receives control information for beam reporting. The base station can obtain indication information indicating an operation mode for beam reporting from control information received via a first UL channel (e.g., PUCCH). The control information can include indication information indicating an operation mode for UE-BR based on PUCCH format 0 or PUCCH format 1. For example, the indication information can indicate either a mode for requesting resource allocation for a second UL channel or a mode for notifying use of the second UL channel. The base station can identify an operation mode for beam reporting of a terminal indicated by the indication information based on at least one of an ID, a base sequence, a phase rotation value, a difference value between phase rotation values, or an orthogonal sequence. The base station can obtain indication information and multiplexed HARQ ACK / NACK information based on the control information. In addition, the base station can obtain information indicating an amount of data for a beam to be reported or an amount of required resources based on the control information. The control information can be received on a preconfigured PUCCH. As another example, control information may be received via PUSCH. In this case, the control information may be multiplexed with uplink data on the PUSCH.

[0284] In step S1705, the base station determines whether transmission of scheduling information is required. Whether transmission of scheduling information is required may be determined based on the operation mode for beam reporting of the terminal. That is, the base station may determine that transmission of scheduling information is required if the operation mode for beam reporting of the terminal is a mode for requesting resource allocation for the second UL channel, and may determine that transmission of scheduling information is not required if the operation mode for beam reporting of the terminal is a mode for notifying the use of the second UL channel.

[0285] If transmission of scheduling information is required, the base station transmits scheduling information in step S1707. The base station may transmit scheduling information to the terminal in response to control information regarding the beam report. The scheduling information may include information regarding a second UL channel for beam report transmission. In step S1709, the base station receives the beam report on the channel indicated by the scheduling information.

[0286] If transmission of scheduling information is not required, in step S1711, the base station receives a beam report on a pre-configured channel. The base station may receive the beam report on a second UL channel notified through control information for the beam report among the pre-configured channels using the configuration information. At this time, the second UL channel used for transmitting the beam report may include the first available UL channel after a pre-defined number of symbols on the time axis from the time point at which the control information for the beam report is transmitted among the pre-configured UL channels.

[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, a step of transmitting control information for beam reporting on a first UL (uplink) channel; A step of transmitting the beam report on a second UL channel corresponding to the control information, The control information for the beam report includes a request for resource allocation for the second UL channel or a notification for use of the second UL channel, A method wherein the control information for the beam report further includes instruction information for distinguishing between a request for resource allocation and the notification.

2. In claim 1, A method wherein the first UL channel includes a physical uplink control channel (PUCCH) configured by radio resource control (RRC) signaling for the UE-BR.

3. In claim 1, A method in which the above instruction information is signaled based on at least one of a phase rotation value applied to a base sequence for PUCCH format 0 or a value of the base sequence.

4. In claim 1, A method in which the above instruction information is multiplexed with the HARQ-ACK / NACK information of the terminal.

5. In claim 4, A method wherein the combination of the above instruction information and the HARQ-ACK / NACK is distinguished based on at least one of a base sequence for PUCCH format 0 or a phase rotation value applied to the base sequence.

6. In claim 1, A method wherein the control information for the beam report further includes information indicating the amount of data for the beam to be reported or the amount of resources required.

7. In claim 1, The above first UL channel is based on PUCCH format 0, A method in which the above PUCCH format 0 is defined to signal an SR (scheduling request) requesting allocation of a PUSCH (physical uplink shared channel) as the second UL channel and HARQ-ACK / NACK excluding the notification, or to signal the HARQ-ACK / NACK, negative SR, and the notification.

8. In claim 7, A method wherein signaling of HARQ-ACK / NACK excluding the above notification and SR requesting allocation of the PUSCH as the second UL channel and signaling of the HARQ-ACK / NACK, the negative SR and the notification are distinguished by a phase rotation value applied to the base sequence.

9. In claim 1, A method further comprising the step of receiving information indicating the type of UCI for which multiplexing with the control information is permitted in the first UL channel.

10. In claim 1, A method in which the above control information is transmitted based on PUCCH format 1.

11. In claim 10, A method in which the control information is generated by multiplexing information indicating a request for allocation of the second UL channel and information indicating the amount of resources required, or by multiplexing information indicating a request for allocation of the second UL channel and HARQ-ACK / NACK.

12. In claim 10, A method in which the above control information is generated by multiplexing information indicating that allocation of the second UL channel is not required and HARQ-ACK / NACK.

13. In claim 10, The above PUCCH format 1 is not defined as dedicated for the UE-BR, The above control information includes the existing SR, A method wherein the above control information further includes an indicator of whether allocation of a second UL channel is requested or one of HARQ-ACK / NACK.

14. In claim 10, The control information includes one of first information multiplexing an indicator of whether to request allocation of a positive SR and the second UL channel, second information multiplexing the positive SR and HARQ-ACK / NACK, or third information multiplexing the negative SR and the HARQ-ACK / NACK, The first information and the second information are expressed as bits of the same value, A method wherein the first information and the second information are distinguished by at least one of an ID, a basis sequence, a phase rotation value, or an orthogonal sequence applied to the PUCCH format 1.

15. In claim 10, The control information includes one of first information multiplexing an indicator of whether to request allocation of a positive SR and the second UL channel, or second information multiplexing a negative SR and the HARQ-ACK / NACK, The above notification is signaled by at least one of an ID, a basis sequence, a phase rotation value, or an orthogonal sequence applicable to PUCCH format 1 including a positive SR.

16. 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) on a first UL (uplink) channel; A step of receiving the beam report in a second UL channel corresponding to the control information, The control information for the beam report includes a request for resource allocation for the second UL channel or a notification for use of the second UL channel, A method wherein the control information for the beam report further includes instruction information for distinguishing between a request for resource allocation and the notification.

17. 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, a step of transmitting control information for beam reporting on a first UL (uplink) channel; A step of transmitting the beam report on a second UL channel corresponding to the control information, The control information for the beam report includes a request for resource allocation for the second UL channel or a notification for use of the second UL channel, A terminal, wherein the control information for the beam report further includes instruction information for distinguishing between a request for resource allocation and the notification.

18. 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) on a first UL (uplink) channel; A step of receiving the beam report in a second UL channel corresponding to the control information, The control information for the beam report includes a request for resource allocation for the second UL channel or a notification for use of the second UL channel, A base station, wherein the control information for the beam report further includes instruction information for distinguishing between a request for resource allocation and the notification.

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