Apparatus and method for reporting channel status information based on sub-configurations in a wireless communication system

Abstract

This disclosure relates to reporting channel state information (CSI) based on sub-configurations in a wireless communication system, and the method performed by a terminal includes the steps of receiving configuration information for a channel state information (CSI) report, which includes a catalog of a number of sub-configurations, and transmitting at least one CSI to a base station, which includes measurement results based on at least one CSI-RS related to the CSI report.

Description

Technical Field

[0001] The following description relates to a wireless communication system, and more particularly, to an apparatus and method for reporting CSI (channel state information) based on sub-configurations in a wireless communication system.

Background Art

[0002] Wireless connection systems are widely deployed to provide various communication services such as voice and data. In general, a wireless connection system is a multiple access system that can support communication with multiple users by sharing available system resources (such as bandwidth and transmission power). Examples of multiple access systems include CDMA (code division multiple access) systems, FDMA (frequency division multiple access) systems, TDMA (time division multiple access) systems, OFDMA (orthogonal frequency division multiple access) systems, SC-FDMA (single carrier frequency division multiple access) systems, and the like.

[0003] Particularly, as many communication devices require a large communication capacity, enhanced mobile broadband (eMBB) communication technologies have been proposed that offer improved performance compared to existing RATs (radio access technologies). In addition, communication systems have been proposed that take into account mMTC (massive machine type communications) for connecting a large number of devices and things to provide various services anytime and anywhere, as well as reliability and latency-sensitive services / UEs (user equipment). Various technical configurations have been proposed for this purpose.

Summary of the Invention

[0004] This disclosure relates to an apparatus and method for effectively reporting channel state information (CSI) based on sub-configurations in a wireless communication system.

[0005] This disclosure relates to an apparatus and method for reducing the overhead of CSI reporting based on subconfigurations in wireless communication systems.

[0006] This disclosure relates to an apparatus and method for distributively transmitting CSIs corresponding to sub-configurations in a wireless communication system.

[0007] This disclosure relates to an apparatus and method for setting up an occasion for transmitting a CSI corresponding to a sub-configuration in a wireless communication system.

[0008] This disclosure relates to an apparatus and method for signaling information related to the occasion for transmitting a CSI corresponding to a sub-configuration in a wireless communication system.

[0009] This disclosure relates to an apparatus and method for signaling information related to an opportunity to transmit a CSI corresponding to a sub-configuration in a wireless communication system.

[0010] This disclosure relates to an apparatus and method for generating CSI subreports transmitted at multiple occasions in a wireless communication system.

[0011] This disclosure relates to an apparatus and method for generating multiple CSI sub-reports based on CSIs corresponding to sub-configurations in a wireless communication system.

[0012] This disclosure relates to an apparatus and method for generating a single CSI sub-report by combining CSIs corresponding to sub-configurations in a wireless communication system.

[0013] This disclosure relates to an apparatus and method for transmitting CSIs corresponding to sub-configurations in a wireless communication system on multiple occasions in order of priority.

[0014] The technical objectives to be achieved in this disclosure are not limited to those mentioned above, and other technical challenges not mentioned can be considered by a person of ordinary skill in the art to which the technical configuration of this disclosure applies, based on the embodiments of this disclosure described below. [Means for solving the problem]

[0015] As an example of the present disclosure, a method performed by a terminal in a wireless communication system includes the steps of receiving configuration information for a channel state information (CSI) report including a catalog of several sub-configurations, and transmitting at least one CSI to a base station including measurement results based on at least one CSI-RS related to the CSI report. The sub-configurations are distinguished by at least one of associated power offsets or the number of antenna ports, and a first CSI sub-report determined based on the at least one CSI is transmitted on a first occasion of an occasion determined based on the configuration information, and a second CSI sub-report determined based on the at least one CSI is transmitted on a second occasion of the occasion.

[0016] As an example of the present disclosure, a terminal in a wireless communication system includes a transceiver and a processor connected to the transceiver, wherein the processor is configured to receive configuration information for a channel state information (CSI) report including a catalog of a plurality of sub-configurations, and to transmit at least one CSI to a base station including measurement results based on at least one CSI-RS related to the CSI report, wherein the sub-configurations are distinguished by at least one of associated power offsets or the number of antenna ports, and a first CSI sub-report determined based on the at least one CSI is transmitted on a first occasion among the occasions determined based on the configuration information, and a second CSI sub-report determined based on the at least one CSI is transmitted on a second occasion among the occasions.

[0017] As an example of the present disclosure, a communication device includes at least one processor, at least one computer memory connected to the at least one processor and storing instruction words that instruct an operation to be performed by the at least one processor, the operation being configured to receive configuration information for a channel state information (CSI) report including a catalog of a plurality of sub-configurations, and to transmit at least one CSI to a base station including measurement results based on at least one CSI-RS related to the CSI report, the sub-configurations being distinguished by at least one of associated power offsets or the number of antenna ports, a first CSI sub-report determined based on the at least one CSI being transmitted on a first occasion of an occasion determined based on the configuration information, and a second CSI sub-report determined based on the at least one CSI being transmitted on a second occasion of the occasion.

[0018] As an example of the present disclosure, a non-transitory computer-readable medium storing at least one instruction includes the at least one instruction, which is executable by a processor, and instructs the device, the processor, to receive configuration information for a channel state information (CSI) report, which includes a catalog of sub-configurations, and to transmit at least one CSI to a base station, which includes measurement results based on at least one CSI-RS related to the CSI report, wherein the sub-configurations are distinguished by at least one of associated power offsets or the number of antenna ports, and a first CSI sub-report determined based on the at least one CSI is transmitted on a first occasion of an occasion determined based on the configuration information, and a second CSI sub-report determined based on the at least one CSI is transmitted on a second occasion of the occasion.

[0019] The aspects of the Disclosure described herein represent only a selection of preferred embodiments of the Disclosure, and a variety of embodiments reflecting the technical features of the Disclosure can be derived and understood by a person ordinary in the art based on the detailed description of the Disclosure described below. [Effects of the Invention]

[0020] The embodiments based on this disclosure will produce the following effects.

[0021] According to this disclosure, the overhead of CSI (channel state information) reporting can be controlled.

[0022] The effects obtainable 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 with ordinary knowledge in the technical field to which the technical configuration of the present disclosure is applied from the description of the embodiments of the present disclosure below. That is, unintended effects resulting from implementing the configurations described in the present disclosure can also be derived by those with ordinary knowledge in the relevant technical field from the embodiments of the present disclosure.

Brief Description of Drawings

[0023] [Figure 1] It is a diagram illustrating the structure of a wireless communication system to which the present disclosure is applicable. [Figure 2] It is a diagram showing an example of a wireless device to which the present disclosure is applicable. [Figure 3] It is a diagram illustrating the frame structure in a wireless communication system to which the present disclosure is applicable. [Figure 4] It illustrates a resource grid in a wireless communication system to which the present disclosure is applicable. [Figure 5] It illustrates a physical resource block in a wireless communication system to which the present disclosure is applicable. [Figure 6] It illustrates the slot structure in a wireless communication system to which the present disclosure is applicable. [Figure 7] It illustrates physical channels (channel: channels) used in a wireless communication system to which the present disclosure is applicable and a general signal transmission / reception method using these. [Figure 8] It shows an example in which physical channels within a slot are mapped in a wireless communication system to which the present disclosure is applicable. [Figure 9] It shows an example of a beam to which the present disclosure is applicable. [Figure 10] It shows an example of a DL BM (downlink beam management) procedure using an SSB (synchronization signal block) to which the present disclosure is applicable. [Figure 11] This disclosure provides an example of a DL BM procedure using CSI (channel state information)-RS (reference signal) that can be applied to this disclosure. [Figure 12] This disclosure provides an example of a terminal receiving beam determination procedure that may be applied to this disclosure. [Figure 13] This disclosure provides an example of a base station transmit beam determination procedure that may be applied to this disclosure. [Figure 14] Examples of resource allocation in the time and frequency domains that may be applied to this disclosure are shown. [Figure 15] This disclosure provides an example of beam sweeping for UL BM (uplink beam management) using an SRS (sounding reference signal) that can be applied to this disclosure. [Figure 16] This disclosure provides an example of an UL BM procedure using SRS that can be applied to this disclosure. [Figure 17] This disclosure provides an example of the operating procedure for a base station supporting network energy saving (NES) technology, which may be applicable to this disclosure. [Figure 18] Examples of procedures for CSI measurement and reporting that may be applied to this disclosure are provided. [Figures 19a-19c] An example of the state of an antenna element according to one embodiment of this disclosure is shown. [Figure 20] One embodiment of this disclosure provides an example of a procedure for reporting CSI for sub-configuration on multiple occasions. [Figure 21] One embodiment of this disclosure provides an example of a procedure for reporting CSI for sub-configuration on multiple occasions with different resource sizes. [Figure 22] One embodiment of this disclosure provides an example of a procedure for sending a CSI report based on sub-configurations. [Modes for carrying out the invention]

[0024] The following embodiments combine the components and features of the Disclosure in a predetermined form. Each component or feature can be considered optional unless otherwise expressly mentioned. Each component or feature can be implemented in a form not combined with other components or features. Alternatively, some components and / or features can be combined to constitute embodiments of the Disclosure. The order of operations described in the embodiments of the Disclosure may be changed. Some components or features of any embodiment may be included in other embodiments, or may be replaced with corresponding components or features of other embodiments.

[0025] In describing the drawings, we have not included any procedures or steps that may obscure the gist of this disclosure, nor have we included any procedures or steps that would be understandable to a person skilled in the art.

[0026] Throughout the specification, when a part "comprising or including" a component, this means, unless otherwise stated, that it may include other components rather than excluding them. Furthermore, terms such as "...part," "...unit," and "module" as used in the specification mean a unit that performs at least one function or operation, which can be realized in hardware, software, or a combination of hardware and software. Also, "a or an," "one," "the," and similar related terms can be used in both singular and plural senses in the context describing this disclosure (particularly in the context of the following claims), unless otherwise indicated herein or explicitly refuted by the context.

[0027] In this specification, embodiments of the present disclosure have been described primarily in relation to the data transmission and reception relationship between a base station and a mobile station. Here, a base station refers to a terminal node of a network that communicates directly with a mobile station. Certain operations described herein as being performed by a base station may, in some cases, be performed by an upper node of the base station.

[0028] In other words, in a network consisting of multiple network nodes, including a base station, various operations performed for communication with a mobile station can be carried out by the base station or other network nodes. In this case, "base station" can be replaced with terms such as fixed station, Node B, eNB (eNode B), gNB (gNode B), ng-eNB, advanced base station (ABS), or access point.

[0029] Furthermore, in the embodiments of this disclosure, the term "terminal" may be replaced with terms such as user equipment (UE), mobile station (MS), subscriber station (SS), mobile subscriber station (MSS), mobile terminal, or advanced mobile station (AMS).

[0030] Furthermore, the transmitting end refers to a fixed and / or mobile node providing data or voice services, and the receiving end refers to a fixed and / or mobile node receiving data or voice services. Therefore, in the case of an uplink, a mobile station can be the transmitting end and a base station can be the receiving end. Similarly, in the case of a downlink, a mobile station can be the receiving end and a base station can be the transmitting end.

[0031] The embodiments of this disclosure can be supported by standard documents disclosed in at least one of the following wireless connectivity systems: IEEE 802.xx systems, 3GPP (3rd Generation Partnership Project: registered trademark; hereinafter the same) systems, 3GPP LTE (Long Term Evolution) systems, 3GPP 5G (5th generation) NR (New Radio) systems, and 3GPP2 systems. In particular, the embodiments of this disclosure can be supported by 3GPP TS (technical specification) 38.211, 3GPP TS 38.212, 3GPP TS 38.213, 3GPP TS 38.321, and 3GPP TS 38.331 documents.

[0032] Furthermore, the embodiments of this disclosure can be applied to other wireless connectivity systems and are not limited to the systems described above. For example, they can be applied to systems subsequently applied to 3GPP 5G NR systems and are not limited to any particular system.

[0033] In other words, any obvious steps or parts of the embodiments of this disclosure that are not described can be explained by referring to the above-mentioned documents. Furthermore, all terms disclosed herein can be explained by the aforementioned standard documents.

[0034] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The detailed description disclosed below, together with the accompanying drawings, is intended to illustrate exemplary embodiments of the present disclosure and is not intended to show only the few embodiments in which the technical configuration of the present disclosure can be implemented.

[0035] Furthermore, certain terms used in the embodiments of this disclosure are provided for the purpose of aiding the understanding of this disclosure, and the use of such specific terms may be modified in other forms as long as it does not deviate from the technical idea of ​​this disclosure.

[0036] The following technologies can be applied to various wireless connectivity systems such as CDMA (code division multiple access), FDMA (frequency division multiple access), TDMA (time division multiple access), OFDMA (orthogonal frequency division multiple access), and SC-FDMA (single carrier frequency division multiple access).

[0037] For the sake of clarity, the following explanation will be based on 3GPP communication systems (e.g., LTE, NR, etc.), but the technical concepts of this disclosure are not limited thereto. LTE may refer to 3GPP TS 36.xxx Release 8 or later technologies. More specifically, LTE technologies from 3GPP TS 36.xxx Release 10 onwards are sometimes called LTE-A, and LTE technologies from 3GPP TS 36.xxx Release 13 onwards are sometimes called LTE-A pro. 3GPP NR may refer to TS 38.xxx Release 15 or later technologies. 3GPP 6G may refer to TS Release 17 and / or Release 18 or later technologies. "xxx" refers to the specification number of the standard document. LTE / NR / 6G may be referred to as 3GPP systems.

[0038] 3GPP 6G can refer to technologies based on the 3GPP system that are post-3GPP NR. 3GPP 6G is not limited to Releases or specific TS documents, and its name may differ from 3GPP 6G. In other words, 3GPP 6G can refer to technologies introduced after 3GPP NR, and is not limited to a specific form.

[0039] The following discussion will focus primarily on the 3GPP NR system, but will not be limited to it; it is also applicable to 3GPP 6G. Furthermore, the matters described below can be modified and used in consideration of the 3GPP 6G system, and are not limited to any particular form. However, for the sake of clarity, the following discussion will focus primarily on the 3GPP NR system. For background information, terminology, abbreviations, etc., used in this disclosure, refer to the standards documents published prior to this disclosure. For example, refer to the 36.xxx and 38.xxx standards documents.

[0040] General System

[0041] As more communication devices demand greater communication capacity, the need for improved mobile broadband communication compared to existing radio access technology (RAT) is emerging. Massive Machine Type Communications (MTC), which connects numerous devices and things to provide various services anytime, anywhere, is also a major issue being considered in next-generation communications. Furthermore, communication system design that takes into account reliability and latency-sensitive services / terminals is being discussed. Thus, the introduction of next-generation RATs that consider eMBB (enhanced mobile broadband communication), mMTC (massive MTC), URLLC (Ultra-Reliable and Low Latency Communication), etc., is being discussed, and for convenience, this disclosure refers to such technologies as NR. NR is an expression that represents an example of 5G RAT.

[0042] The new RAT system, including NR, uses the OFDM transmission method or a similar transmission method. The new RAT system can follow OFDM parameters different from those of LTE. Alternatively, the new RAT system can follow the existing LTE / LTE-A numerology but support a larger system bandwidth (e.g., 100 MHz). Alternatively, a single cell can support multiple numerologies; that is, terminals operating with different numerologies can coexist within a single cell.

[0043] A numerology corresponds to a single subcarrier spacing in the frequency domain. Different numerologies can be defined by scaling the reference subcarrier spacing by an integer N.

[0044] Furthermore, new RAT systems, including 6G, can be considered as next-generation RATs. These new RAT systems, including 6G, may, but are not limited to, i) extremely high data rates per device, ii) a very large number of connected devices, iii) global connectivity, iv) very low latency, v) low energy consumption for battery-free IoT devices, vi) ultra-high reliability connectivity, and vii) connected intelligence with machine learning capabilities. Taking the aforementioned aspects into account, new RAT systems, including 6G, may consider using the THz (Terahertz) frequency band at higher frequencies than NR systems for wider bandwidth and higher transmission speeds. New RAT systems, including 6G, may, but are not limited to, applying AI / ML (artificial intelligence / machine learning) to overcome existing limitations.

[0045] Figure 1 illustrates the structure of a wireless communication system to which this disclosure can be applied. Referring to Figure 1, the NG-RAN consists of the NG-RA (NG-Radio Access) user plane (i.e., the new AS (access stratum) sublayer / PDCP (Packet Data Convergence Protocol) / RLC (Radio Link Control) / MAC / PHY) and a gNB that provides control plane (RRC) protocol termination to the UE. The gNBs are interconnected via the Xn interface. The gNBs are also connected to the NGC (New Generation Core) via the NG interface. More specifically, the gNBs are connected to the AMF (Access and Mobility Management Function) via the N2 interface and to the UPF (User Plane Function) via the N3 interface. Figure 1 is a structure based on an NR system, and in a 6G system, the structure of Figure 1 may be used identically or with some modifications, and is not limited to a particular form.

[0046] Figure 2 shows an example of a wireless device applicable to this disclosure.

[0047] Referring to Figure 2, the wireless device 200 can transmit and receive wireless signals via various wireless connectivity technologies (e.g., LTE, LTE-A, LTE-A pro, NR, 5G, 5G-A, 6G). The wireless device 200 includes at least one processor 202 and at least one memory 204, and may further include at least one transceiver 206 and / or at least one antenna 208.

[0048] The processor 202 can be configured to control the memory 204 and / or the transceiver 206 to implement the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. For example, the processor 202 can process information in the memory 204 to generate first information / signals, and then transmit a radio signal containing the first information / signals via the transceiver 206. Alternatively, the processor 202 can receive a radio signal containing second information / signals via the transceiver 206, and then store information obtained from signal processing of the second information / signals in the memory 204. The memory 204 can be connected to the processor 202 and can store various information relating to the operation of the processor 202. For example, the memory 204 can store software code containing instructions for performing some or all of the processes controlled by the processor 202, or for performing the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. Here, the processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to implement wireless communication technology. The transceiver 206 can be connected to the processor 202 and can transmit and / or receive radio signals via at least one antenna 208. The transceiver 206 may include a transmitter and / or receiver. The transceiver 206 can be used in combination with an RF (radio frequency) unit. In this disclosure, the term "wireless device" may also mean a communication modem / circuit / chip.

[0049] The hardware elements of the wireless device 200 will be described in more detail below. While not limited to these, at least one protocol layer can be implemented by at least one processor 202. For example, at least one processor 202 can implement at least one layer (e.g., a functional layer such as PHY (physical), MAC (media access control), RLC (radio link control), PDCP (packet data convergence protocol), RRC (radio resource control), SDAP (service data adaptation protocol)). At least one processor 202 can generate at least one PDU (Protocol Data Unit) and / or at least one SDU (service data unit) according to the descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed herein. At least one processor 202 can generate messages, control information, data, or information according to the descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed herein. At least one processor 202 can generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information in accordance with the functions, procedures, suggestions and / or methods disclosed herein and provide them to at least one transceiver 206. At least one processor 202 can receive signals (e.g., baseband signals) from at least one transceiver 206 and acquire PDUs, SDUs, messages, control information, data, or information in accordance with the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein.

[0050] At least one processor 202 is also called a controller, microcontroller, microprocessor, or microcomputer. At least one processor 202 can be implemented by hardware, firmware, software, or a combination thereof. As an example, at least one ASIC (application specific integrated circuit), at least one DSP (digital signal processor), at least one DSPD (digital signal processing device), at least one PLD (programmable logic device), or at least one FPGA (field programmable gate arrays) may be included in at least one processor 202. The descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein can be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc. Firmware or software configured to perform the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein may be included in at least one processor 202 or stored in at least one memory 204 and driven by at least one processor 202. The descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein can be implemented using firmware or software in the form of code, commands and / or sets of commands.

[0051] At least one memory 204 can be connected to at least one processor 202 and can store data, signals, messages, information, programs, code, instructions and / or commands in various forms. At least one memory 204 can consist of ROM (read-only memory), RAM (random access memory), EPROM (erasable programmable read-only memory), flash memory, hard drive, registers, cache memory, computer-readable storage media, and / or a combination thereof. At least one memory 204 can be located inside and / or outside at least one processor 202. At least one memory 204 can also be connected to at least one processor 202 via various technologies such as wired or wireless connections.

[0052] At least one transceiver 206 can transmit user data, control information, radio signals / channels, etc., as described in the methods and / or operation flowcharts of this specification, to at least one other device. At least one transceiver 206 can receive user data, control information, radio signals / channels, etc., as described in the descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed herein, from at least one other device. For example, at least one transceiver 206 can be connected to at least one processor 202 and can transmit and receive radio signals. For example, at least one processor 202 can control at least one transceiver 206 to transmit user data, control information, or radio signals to at least one other device. Also, at least one processor 202 can control at least one transceiver 206 to receive user data, control information, or radio signals from at least one other device. Furthermore, at least one transceiver 206 can be connected to at least one antenna 208, and at least one transceiver 206 can be configured to send and receive user data, control information, radio signals / channels, etc., as described herein in the descriptions, functions, procedures, suggestions, methods and / or operation flowcharts, etc. In this specification, at least one antenna may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). At least one transceiver 206 can convert the received user data, control information, radio signals / channels, etc., from RF band signals to baseband signals for processing using at least one processor 202. At least one transceiver 206 can convert the user data, control information, radio signals / channels, etc., processed by at least one processor 202, from baseband signals to RF band signals. For this purpose, at least one transceiver 206 may include an (analog) oscillator and / or a filter.

[0053] The components of the wireless device described with reference to Figure 2 may be referred to by other terms from a functional standpoint. For example, the processor 202 may be called the control unit, the transceiver 206 the communication unit, and the memory 204 the storage unit. Depending on the context, the term "communication unit" may be used to include at least a portion of the processor 202 and the transceiver 206.

[0054] The structure of the wireless device described with reference to Figure 2 can be understood as the structure of at least a part of various devices. For example, it is at least a part of various devices (e.g., robots, vehicles, XR devices, mobile devices, home appliances, IoT devices, AI devices / servers, etc.). Furthermore, depending on the various embodiments, the device may further include other components in addition to the components illustrated in Figure 2.

[0055] For example, the device may be a portable device such as a smartphone, smart pad, wearable device (e.g., smartwatch, smart glasses), or portable computer (e.g., laptop computer). In this case, the device may further include at least one of the following: a power supply unit that supplies power and includes a wired / wireless charging circuit, a battery, etc.; an interface unit that includes at least one port for connection with other devices (e.g., an audio input / output port, a video input / output port); and an input / output unit for inputting and outputting image information / signals, audio information / signals, data, and / or information input from the user.

[0056] For example, the device may be a mobile robot, vehicle, train, aerial vehicle (AV), ship, or other mobile device. In this case, the device may further include a drive unit including at least one of the device's engine, motor, powertrain, wheels, brakes, and steering device; a power supply unit that supplies power and includes a wired / wireless charging circuit, battery, etc.; a sensor unit that detects status information, environmental information, and user information of the device or its surroundings; an autonomous driving unit that performs functions such as route keeping, speed adjustment, and destination setting; and a position measurement unit that acquires position information of the mobile device via GPS (global positioning system) and various sensors.

[0057] For example, the device is an XR device such as an HMD, a HUD (head-up display) installed in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance, digital signage, a vehicle, or a robot. In this case, the device may further include at least one of the following: a power supply unit that supplies power and includes wired / wireless charging circuits and a battery; an input / output unit that acquires control information, data, etc. from the outside and outputs generated XR objects; and a sensor unit that detects status information, environmental information, and user information of the device or its surroundings.

[0058] For example, the device is a robot that can be classified as industrial, medical, household, military, etc., depending on its intended use and field. In this case, the device may further include at least one of the following: a sensor unit that detects status information, environmental information, and user information of the device or its surroundings; and a drive unit that performs various physical actions such as moving robot joints.

[0059] For example, the devices are AI devices such as televisions, projectors, smartphones, PCs, laptops, digital broadcasting terminals, tablet PCs, wearable devices, set-top boxes (STBs), radios, washing machines, refrigerators, digital signage, robots, and vehicles. In this case, the device may further include at least one of the following: an input unit that acquires various types of data from the outside; an output unit that generates outputs related to vision, hearing, or touch; a sensor unit that detects state information, environmental information, and user information of the device or its surroundings; and a training unit that learns a model composed of an artificial neural network using training data. The structure of the wireless device illustrated in Figure 2 can be understood as part of a RAN node (e.g., base station, DU, RU, RRH, etc.). That is, the device illustrated in Figure 2 may be a RAN node. In this case, the device may further include wired transceivers for front haul and / or back haul communication. However, if the fronthaul and / or backhaul communication is based on wireless communication, at least one transceiver 206 as illustrated in Figure 2 may be used for the fronthaul and / or backhaul communication, and a wired transceiver may not be included.

[0060] Figure 3 illustrates a frame structure in a wireless communication system to which this disclosure can be applied.

[0061] The NR system can support a number of numerologies, which can be defined by subcarrier spacing and cyclic prefix (CP) overhead. These numerous subcarrier spacings can be derived by scaling the fundamental (reference) subcarrier spacing by an integer N (or μ). Furthermore, even assuming that very low subcarrier spacings are not used at very high carrier frequencies, the numerology used can be selected independently of the frequency band. The NR system can also support various frame structures based on these numerous numerologies.

[0062] The following describes the OFDM numerology and frame structures that can be considered in the NR system. The numerous OFDM numerologies supported by the NR system can be defined as shown in Table 1 below.

[0063] [Table 1]

[0064] NR supports numerous numerologies (or subcarrier spacings (SCS)) to support various 5G services. For example, an SCS of 15kHz supports wide area in the traditional cellular band; an SCS of 30kHz / 60kHz supports dense-urban areas, lower latency, and wider carrier bandwidth; and an SCS of 60kHz or higher supports bandwidths wider than 24.25GHz to overcome phase noise. The NR frequency band is defined by two types of frequency ranges (FR1, FR2). FR1 and FR2 can be configured as shown in Table 2 below. Also, FR2 can mean millimeter wave (mmW).

[0065] [Table 2]

[0066] JPEG2026513869000004.jpg179165

[0067] [Table 3]

[0068] [Table 4]

[0069] Figure 3 shows an example where μ=2 (SCS is 60kHz). Referring to Table 3, one subframe can contain four slots. The one subframe = {1,2,4} slots shown in Figure 3 is just an example, and the number of slots that can be included in one subframe is defined as shown in Table 3 or Table 4. Also, a mini-slot may contain 2, 4, or 7 symbols, or even more or fewer symbols. In relation to physical resources in an NR system, antenna ports, resource grids, resource elements, resource blocks, and carrier parts can be considered. The following describes in detail the physical resources that can be considered in an NR system.

[0070] First, regarding antenna ports, an antenna port is defined such that the channel on which symbols are carried on an antenna port can be inferred from the channels on which other symbols on the same antenna port are carried. If the large-scale property of the channel on which symbols are carried on one antenna port can be inferred from the channels on which symbols are carried on another antenna port, then the two antenna ports can be said to be in a QC / QCL (quasi co-located or quasi co-location) relationship. Here, the large-scale property includes one or more of the following: delay spread, Doppler spread, frequency shift, average received power, and received timing.

[0071] In 6G systems, communication can be performed at terahertz frequencies, which are higher than millimeter waves (mmW), and a frame structure similar to that in Figure 3 can be used, or a separate frame structure for 6G systems can be used; it is not limited to a specific form.

[0072] Figure 4 illustrates a resource grid in a wireless communication system to which this disclosure can be applied.

[0073] JPEG2026513869000007.jpg150165

[0074] Point A serves as the common reference point for the resource block grid and is obtained as follows:

[0075] - The offsetToPointA for the primary cell (PCell) downlink indicates the frequency offset between the lowest subcarrier of the lowest resource block overlapping with the SSB used by the terminal for initial cell selection and point A. It is expressed in resource block units, assuming a subcarrier spacing of 15 kHz for FR1 and 60 kHz for FR2.

[0076] -absoluteFrequencyPointA indicates the frequency-position of point A, expressed as ARFCN (absolute radio-frequency channel number).

[0077] Common resource blocks are numbered upwards from 0 in the frequency domain relative to the subcarrier spacing setting μ. The center of subcarrier0 of common resource block 0 relative to the subcarrier spacing setting μ coincides with "pointA". Common resource block number in the frequency domain The relationship between JPEG2026513869000008.jpg710 and the resource elements (k, l) with respect to the subcarrier spacing setting μ is given by the following equation 1.

[0078]

number

[0079] JPEG2026513869000010.jpg42164

[0080]

number

[0081] JPEG2026513869000012.jpg17164

[0082] Figure 5 illustrates a physical resource block in a wireless communication system to which this disclosure can be applied. Figure 6 illustrates a slot structure in a wireless communication system to which this disclosure can be applied.

[0083] Referring to Figures 5 and 6, a slot contains multiple symbols in the time domain. For example, in a normal CP, one slot contains seven symbols, but in an extended CP, one slot contains six symbols.

[0084] A carrier wave contains multiple subcarriers in the frequency domain. An RB (Resource Block) is defined by multiple (e.g., 12) consecutive subcarriers in the frequency domain. A BWP (Bandwidth Part) is defined by multiple consecutive (physical) resource blocks in the frequency domain and can correspond to one numerology (e.g., SCS, CP length, etc.). A carrier wave can contain up to N (e.g., 5) BWPs. Data communication occurs via activated BWPs, and only one BWP can be activated per terminal. In a resource grid, each element is called a Resource Element (RE) and can be mapped to one complex number symbol.

[0085] NR systems can support up to 400 MHz per component carrier (CC). If a terminal operating on such a wideband CC keeps its radio frequency (RF) chip on for the entire CC at all times, it can consume a significant amount of battery power. Alternatively, when considering various use cases operating within a single wideband CC (e.g., eMBB, URLLC, Mmtc, V2X, etc.), different numerologies (e.g., subcarrier spacing) may be supported for each frequency band within that CC. Or, different terminals may have different capabilities for the maximum bandwidth. To address this, a base station can instruct terminals to operate on only a portion of the wideband CC's bandwidth, rather than the entire bandwidth, and this portion of the bandwidth is conveniently defined as a bandwidth part (BWP). A BWP can consist of consecutive RBs on the frequency axis and can correspond to a single numerology (e.g., subcarrier spacing, CP length, slot / minislot interval).

[0086] On the other hand, a base station can configure multiple BWPs within a single CC configured on a terminal. For example, in a PDCCH monitoring slot, a BWP occupying a relatively small frequency range can be configured, and the PDSCH indicated by the PDCCH can be scheduled on a larger BWP. Alternatively, if UEs are concentrated on a particular BWP, some terminals can be configured on other BWPs for load balancing. Or, considering frequency domain inter-cell interference cancellation between adjacent cells, a portion of the central spectrum of the entire bandwidth can be excluded, and BWPs on both sides can be configured within the same slot. In other words, a base station can configure at least one DL / UL BWP on terminals associated with a broadband CC. A base station can activate at least one DL / UL BWP among those configured at a particular time (by L1 signaling, MAC CE (control element), or RRC signaling, etc.). Furthermore, the base station can instruct switching to another configured DL / UL BWP (by L1 signaling, MAC CE, or RRC signaling, etc.). Alternatively, it can switch to a configured DL / UL BWP on a timer basis when the timer value expires. In this case, the activated DL / UL BWP is defined as the active DL / UL BWP. However, in situations such as when the terminal is performing the initial access process or before the RRC connection is set up, the configuration for the DL / UL BWP may not be received. In such situations, the DL / UL BWP assumed by the terminal is defined as the initially active DL / UL BWP.

[0087] Figure 7 illustrates physical channels used in wireless communication systems to which this disclosure can be applied, and typical signal transmission and reception methods using them.

[0088] In wireless communication systems, terminals receive information from base stations via the downlink and transmit information to base stations via the uplink. The information transmitted and received between base stations and terminals includes data and various control information, and various physical channels exist depending on the type and purpose of the information being transmitted and received.

[0089] When a terminal is powered on or enters a new cell, it performs initial cell search operations, such as synchronizing with the base station (S701). Therefore, the terminal receives the Primary Synchronization Signal (PSS) and Secondary Synchronization Signal (SSS) from the base station to synchronize with it and obtain information such as the cell identifier (ID). Subsequently, the terminal receives the Physical Broadcast Channel (PBCH) from the base station to obtain broadcast information within the cell. Meanwhile, during the initial cell search phase, the terminal receives the Downlink Reference Signal (DL RS) to check the downlink channel status.

[0090] After completing the initial cell search, the terminal can obtain more specific system information by receiving the Physical Downlink Control Channel (PDCCH) and the Physical Downlink Shared Channel (PDSCH) based on the information on the PDCCH (S702).

[0091] On the other hand, if the terminal is initially connected to a base station or does not have radio resources for signal transmission, it can perform a Random Access Procedure (RACH) to the base station (steps S703 to S706). Therefore, the terminal can send a specific sequence to the preamble via a Physical Random Access Channel (PRACH) (S703 and S705) and receive a response message to the preamble via the PDCCH and corresponding PDSCH (S704 and S706). In the case of a contention-based RACH, a Contention Resolution Procedure can be performed.

[0092] A terminal that has followed the procedures described above can subsequently perform PDCCH / PDSCH reception (S707) and Physical Uplink Shared Channel (PUSCH) / Physical Uplink Control Channel (PUCCH) transmission (S708) as general uplink signal transmission procedures. In particular, the terminal receives Downlink Control Information (DCI) via PDCCH. Here, DCI includes control information such as resource allocation information for the terminal, and its format differs depending on its intended use.

[0093] On the other hand, control information that a terminal transmits to or receives from a base station via the uplink includes down / uplink ACK / NACK (Acknowledgement / Non-Acknowledgement) signals, CQI (Channel Quality Indicator), PMI (Precoding Matrix Indicator), RI (Rank Indicator), etc. In the case of a 3GPP LTE system, the terminal can transmit the aforementioned control information such as CQI / PMI / RI via PUSCH and / or PUCCH.

[0094] Figure 8 shows an example of how physical channels within a slot are mapped in a wireless communication system to which this disclosure may apply.

[0095] Referring to Figure 8, a single slot contains the DL control channel, DL or UL data, and the UL control channel. For example, the first N symbols in a slot are used to transmit the DL control channel (hereinafter referred to as the DL control area), and the last M symbols in the slot are used to transmit the UL control channel (hereinafter referred to as the UL control area). N and M are integers greater than or equal to 0. The resource area between the DL control area and the UL control area (hereinafter referred to as the data area) is used for transmitting either DL data or UL data. A time gap exists between the control area and the data area for DL-to-UL or UL-to-DL switching. PDCCH is transmitted in the DL control area, and PDSCH is transmitted in the DL data area. Some symbols at the time of conversion from DL to UL within the slot are used as the time gap.

[0096] Downlink (DL) physical channel / signal

[0097] (1) PDSCH

[0098] The PDSCH carries downlink data (e.g., DL-shared channel transport block, DL-SCH TB). The TB is encoded into a codeword (CW), then transmitted after scrambling and modulation. A CW contains one or more code blocks (CBs). One or more CBs are grouped into a CBG (CB group). Depending on the cell configuration, a PDSCH can carry up to two CWs. Each CW is scrambled and modulated, and the modulation symbols generated from each CW are mapped to one or more layers. Each layer is precoded and mapped to a resource along with the DMRS, and transmitted at the corresponding antenna port. The PDSCH is either dynamically scheduled by the PDCCH (dynamic scheduling) or semi-statically scheduled based on higher-layer (e.g., RRC) signaling (and / or Layer 1 (L1) signaling (e.g., PDCCH)) (Configured Scheduling, CS). Therefore, in dynamic scheduling, PDSCH transmission is accompanied by PDCCH, but in CS, PDSCH transmission is not accompanied by PDCCH. CS includes SPS (semi-persistent scheduling).

[0099] (2) PDCCH

[0100] The PDCCH carries DCI (Downlink Control Information). For example, the PCCCH (i.e., DCI) carries the transmission format and resource allocation for the DL-SCH, frequency / time resource allocation information for the UL-SCH (shared channel), paging information for the PCH (paging channel), system information on the DL-SCH, frequency / time resource allocation information for higher-layer control messages such as arbitrary connection responses (RARs) transmitted on the PDSCH, transmit power control commands, and information regarding the activation / deactivation of SPS / CS (Configured Scheduling). Various DCI formats are provided by the information within the DCI.

[0101] Table 5 illustrates the DCI format transmitted via PDCCH.

[0102] [Table 5]

[0103] DCI format 0_0 is used to schedule TB-based (or TB-level) PUSCHs, and DCI format 0_1 ​​is used to schedule TB-based (or TB-level) PUSCHs or CBG (Code Block Group)-based (or CBG-level) PUSCHs. DCI format 1_0 is used to schedule TB-based (or TB-level) PDSCHs, and DCI format 1_1 is used to schedule TB-based (or TB-level) PDSCHs or CBG-based (or CBG-level) PDSCHs (DL Grant DCI). DCI formats 0_0 / 0_1 are referred to as UL Grant DCI or UL scheduling information, and DCI formats 1_0 / 1_1 are referred to as DL Grant DCI or UL scheduling information. DCI format 2_0 is used to transmit dynamic slot format information (e.g., dynamic SFI) to the terminal, and DCI format 2_1 is used to transmit downlink pre-emption information to the terminal. DCI format 2_0 and / or DCI format 2_1 are transmitted to terminals within a defined group via a Group common PDCCH, which is a PDCCH transmitted to terminals within that group.

[0104] PDCCH / DCI includes a CRC (cyclic redundancy check), which is masked / scrambled with various identifiers (e.g., Radio Network Temporary Identifier, RNTI) depending on the PDCCH's owner or intended use. For example, if the PDCCH is for a specific terminal, the CRC is masked to C-RNTI (Cell-RNTI). If the PDCCH is related to paging, the CRC is masked to P-RNTI (Paging-RNTI). If the PDCCH is related to system information (e.g., System Information Block, SIB), the CRC is masked to SI-RNTI (System Information RNTI). If the PDCCH is related to arbitrary connection responses, the CRC is masked to RA-RNTI (Random Access-RNTI).

[0105] Table 6 illustrates the applications and transmit channels of PDCCH by RNTI. The transmit channel refers to the transmit channel associated with the data carried by PDSCH / PUSCH scheduled by PDCCH.

[0106] [Table 6]

[0107] The modulation scheme of a PDCCH is fixed (e.g., Quadrature Phase Shift Keying, QPSK), and one PDCCH consists of 1, 2, 4, 8, or 16 Control Channel Elements (CCEs) determined by the Aggregation Level (AL). One CCE consists of 6 Resource Element Groups (REGs). One REG is defined by one OFDM symbol and one (P)RB.

[0108] PDCCH is transmitted in a CORESET (Control Resource Set). A CORESET corresponds to a set of physical resources / parameters used to carry PDCCH / DCI within a BWP. For example, a CORESET includes a set of REGs with a given pneumatics (e.g., SCS, CP length, etc.). A CORESET is configured by system information (e.g., MIB) or terminal-specific (UE-specific) upper-layer (e.g., RRC) signaling. Examples of parameters / information used to configure a CORESET are as follows. One or more CORESETs may be configured on a single terminal, and multiple CORESETs may be superimposed in the time / frequency domain.

[0109] - controlResourceSetId: Indicates the identification information (ID) of the CORESET.

[0110] - frequencyDomainResources: Indicates the frequency domain resources of CORESET. Indicated by a bitmap, each bit corresponds to an RB group (= 6 consecutive RBs). For example, the MSB (Most Significant Bit) of the bitmap corresponds to the first RB group in the BWP. The RB group corresponding to a bit with a value of 1 is allocated to the frequency domain resources of CORESET.

[0111] - duration: Indicates the time-domain resource of the CORESET. It indicates the number of consecutive OFDMA symbols that make up the CORESET. For example, duration can have values ​​from 1 to 3.

[0112] - cce-REG-MappingType: Indicates the CCE-to-REG mapping type. Interleaved and non-interleaved types are supported.

[0113] - precoderGranularity: Indicates the precoder granularity in the frequency domain.

[0114] - tci-StateSPDCCH: Indicates information (e.g., TCI-StateID) that indicates the TCI (Transmission Configuration Indication) state for the PDCCH. The TCI state is used to provide the QCL (Quasi-Co-Location) relationship between DL RS and PDCCH DMRS ports within the RS set (TCI-state).

[0115] - tci-PresentInDCI: Indicates whether the TCI field within the DCI is included.

[0116] - pdcch-DMRS-ScramblingID: Indicates information used to initialize the PDCCH DMRS scrambling sequence.

[0117] For PDCCH reception, the terminal monitors a set of PDCCH candidates in a CORESET (e.g., blind decoding). PDCCH candidates indicate the CCEs that the terminal monitors for PDCCH reception / detection. PDCCH monitoring is performed in one or more CORESETs on the active DL BWP on each activated cell where PDCCH monitoring is configured. The set of PDCCH candidates that the terminal monitors is defined as the PDCCH Search Space (SS) set. The SS set is either a Common Search Space (CSS) set or a Terminal-Specific Search Space (UE-specific Search Space, USS) set.

[0118] Table 7 illustrates the PDCCH search space.

[0119] [Table 7]

[0120] SS sets are configured by system information (e.g., MIB) or higher-level (e.g., RRC) signaling specific to the end-user (UE). Each DL BWP in a serving cell has up to S (e.g., 10) SS sets configured. For example, the following parameters / information are provided for each SS set (by the RRC information element (IE) SearchSpace). Each SS set is associated with one CORESET, and each CORESET configuration is associated with one or more SS sets.

[0121] - searchSpaceId: Indicates the ID of the SS set.

[0122] - controlResourceSetId: Indicates the CORESET associated with the SS set.

[0123] - monitoringSlotPeriodicityAndOffset: Indicates the PDCCH monitoring period interval (per slot) and the PDCCH monitoring period offset (per slot).

[0124] - monitoringSymbolsWithinSlot: Indicates the first OFDMA symbol for PDCCH monitoring within a slot where PDCCH monitoring is configured. Indicated via a bitmap, where each bit corresponds to each OFDMA symbol in the slot. The MSB of the bitmap corresponds to the first OFDMA symbol in the slot. The OFDMA symbol corresponding to the bit with a bit value of 1 corresponds to the first CORESET symbol in the slot.

[0125] - nrofCandidates: Indicates the number of PDCCH candidates for each AL={1, 2, 4, 8, 16} (for example, one of the values ​​0, 1, 2, 3, 4, 5, 6, 8).

[0126] - searchSpaceType: Indicates whether the SS type is CSS or USS.

[0127] - DCI format: Shows the DCI format of the PDCCH candidate.

[0128] Based on the CORESET / SS set configuration, the terminal can monitor PDCCH candidates in one or more SS sets within the slot. An occasion (e.g., time / frequency resource) for which a PDCCH candidate should be monitored is defined as a PDCCH (monitoring) opportunity. One or more PDCCH (monitoring) opportunities are configured within the slot.

[0129] Uplink (DL) physical channel / signal

[0130] (1) PUSCH

[0131] PUSCH carries uplink data (e.g., UL-SCH TB) and / or uplink control information (UCI) and is transmitted based on a CP-OFDM (Cyclic Prefix-Orthogonal Frequency Division Multiplexing) waveform or a DFT-s-OFDM (Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplexing) waveform. When PUSCH is transmitted based on a DFT-s-OFDM waveform, the terminal applies transform precoding before transmitting PUSCH. For example, if transform precoding is not possible (e.g., transform precoding is disabled), the terminal transmits PUSCH based on a CP-OFDM waveform; if transform precoding is possible (e.g., transform precoding is enabled), the terminal transmits PUSCH based on either a CP-OFDM or DFT-s-OFDM waveform. PUSCH transmissions are either dynamically scheduled by PDCCH (dynamic scheduling) or semi-statically scheduled based on higher-level (e.g., RRC) signaling (and / or Layer 1 (L1) signaling (e.g., PDCCH)) (Configured Scheduling, CS). Therefore, in dynamic scheduling, PDCCH transmissions are accompanied by PDCCH, but in CS, PDCCH transmissions are not accompanied by PDCCH. CS includes Type-1 CG (Configured Grant) PUSCH transmissions and Type-2 CG PUSCH transmissions. In Type-1 CG, all parameters for PUSCH transmissions are signaled by higher levels. In Type-2 CG, some parameters for PUSCH transmissions are signaled by higher levels, and the rest are signaled by PDCCH. Basically, in CS, PDCCH transmissions are not accompanied by PDCCH.

[0132] (2) PUCCH

[0133] PUCCH carries UCI (Uplink Control Information). UCI includes the following:

[0134] -SR (Scheduling Request): This is information used to request UL-SCH resources.

[0135] HARQ-ACK (Hybrid Automatic Repeat and reQuest Acknowledgement): This is a received response signal to DL signals (e.g., PDSCH, SPS-deactivated PDCCH). HARQ-ACK responses include positive ACK (simply ACK), negative ACK (NACK), DTX (Discontinuous Transmission), or NACK / DTX. HARQ-ACK is used interchangeably with A / N, ACK / NACK, HARQ-ACK / NACK, etc. HARQ-ACK is generated in TB-units / CBG-units.

[0136] -CSI (Channel Status Information): This is feedback information for DL ​​channels. CSI includes CQI (Channel Quality Information), RI (Rank Indicator), PMI (Precoding Matrix Indicator), PTI (Precoding Type Indicator), etc.

[0137] Table 8 illustrates the PUCCH format. The PUCCH format is classified by the size of the UCI payload / transmission length (e.g., the number of symbols that make up the PUCCH resource) / transmission structure. The PUCCH format is classified into Short PUCCH (formats 0, 2) and Long PUCCH (formats 1, 3, 4) based on the transmission length.

[0138] [Table 8]

[0139] (0)PUCCH format 0 (PF0)

[0140] - Supportable UCI payload size: Up to K bits (e.g., K=2)

[0141] - Number of OFDM symbols constituting a single PUCCH: 1 to X symbols (e.g., X=2)

[0142] -Transmission structure: Consists only of UCI signals without DM-RS, and transmits the UCI state by selecting and transmitting one of several sequences.

[0143] (1) PUCCH format 1 (PF1)

[0144] - Supportable UCI payload size: Up to K bits (e.g., K=2)

[0145] - Number of OFDM symbols constituting a single PUCCH: Y to Z symbols (e.g., Y=4, Z=14)

[0146] - Transmission structure: DM-RS and UCI are configured in TDM form with different OFDM symbols, and UCI is a form that modulates (e.g., QPSK) symbols on a specific sequence. Both UCI and DM-RS apply CS (cyclic shift) / OCC (Orthogonal Cover Code) to support CDM between multiple PUCCH resources (following PUCCH format 1) (within the same RB).

[0147] (2) PUCCH format 2 (PF2)

[0148] - Supportable UCI payload size: Up to K bits (e.g., K=2)

[0149] - Number of OFDM symbols constituting a single PUCCH: 1 to x symbols (e.g., X=2)

[0150] -Transmission structure: DMRS and UCI are configured / mapped in FDM form within the same symbol, and the structure is transmitted by applying only IFFT without DFT to the encoded UCI bits.

[0151] (3) PUCCH format 3 (PF3)

[0152] - Supportable UCI payload size: K bits or more (e.g., K=2)

[0153] - Number of OFDM symbols constituting a single PUCCH: Y to Z symbols (e.g., Y=4, Z=14)

[0154] -Transmission Structure: DMRS and UCI are configured / mapped to different symbols in TDM form, and DFT is applied to the encoded UCI bits for transmission. OCC is applied to the UCI at the beginning of the DFT, and CS (or IFDM mapping) is applied to DMRS to support multiplexing to multiple terminals.

[0155] (4) PUCCH format 4 (PF4)

[0156] - Supportable UCI payload size: K bits or more (e.g., K=2)

[0157] - Number of OFDM symbols constituting a single PUCCH: Y to Z symbols (e.g., Y=4, Z=14)

[0158] -Transmission structure: DMRS and UCI are configured / mapped to different symbols in TDM form, and DFT is applied to the encoded UCI bits for transmission without inter-terminal multiplexing.

[0159] Beam Management (BM)

[0160] A beam set (BM) procedure is an L1 (layer 1) / L2 (layer 2) procedure for acquiring and maintaining a beam set of a base station (e.g., gNB, TRP, etc.) and / or terminal (e.g., UE) that can be used for downlink (DL) and uplink (UL) transmission / reception, and may include the following procedures and terms:

[0161] - Beam measurement: An operation in which a base station or UE measures the characteristics of a beamforming signal received.

[0162] - Beam determination: The operation in which a base station or UE selects its own transmit beam (Tx beam) / receive beam (Rx beam).

[0163] - Beam sweeping: An operation that covers a spatial area using transmitted and / or received beams at regular time intervals in a predetermined manner.

[0164] - Beam report: An operation in which the UE reports information about the beamformed signal based on beam measurements.

[0165] BM procedures can be divided into (1) DL BM procedures using SS (synchronization signal) / PBCH (physical broadcast channel) blocks or CSI-RS, and (2) UL BM procedures using SRS (sounding reference signal).

[0166] Furthermore, each BM procedure may include a Tx beam sweep to determine the Tx beam and an Rx beam sweep to determine the Rx beam.

[0167]

[0168] The DL BM procedure may include (1) transmission for beamformed DL RS (reference signal) (e.g., CSI-RS or SS block (SSB)) of a base station, and (2) beam reporting of a terminal.

[0169] Here, the beam report may include preferred DL RS ID(s) (identifier) and the corresponding L1-RSRP (Reference Signal Received Power).

[0170] The DL RS ID may be an SSBRI (SSB Resource Indicator) or a CRI (CSI-RS Resource Indicator).

[0171] As shown in FIG. 9, the SSB beam and the CSI-RS beam can be used for beam measurement. The measurement metric is the L1-RSRP per resource / block. The SSB can be used for coarse beam measurement, and the CSI-RS can be used for fine beam measurement. The SSB can be used for both Tx beam sweeping and Rx beam sweeping.

[0172] Rx beam sweeping using the SSB can be performed while the UE changes the Rx beam for the same SSBRI across a number of SSB bursts. Here, one SS burst includes one or more SSBs, and one set of SS bursts includes one or more SSB bursts.

[0173]

[0174] Figure 10 is a flowchart of an example of a DL BM procedure using SSB.

[0175] The settings for beam reporting using SSB are performed during CSI / beam setup in RRC-connected state (or RRC-connected mode).

[0176] - The terminal receives a CSI-ResourceConfig IE from the base station, which includes a CSI-SSB-ResourceSetList containing the SSB resources used for BM (S410).

[0177] As shown in Table 9's CSI-ResourceConfig IE, BM settings using SSB are not defined separately; instead, SSB is configured like a CSI-RS resource.

[0178] [Table 9]

[0179] Table 9 shows that the csi-SSB-ResourceSetList parameter represents a list of SSB resources used for beam management and reporting in a single resource set. Here, the SSB resource set can be configured as {SSBx1, SSBx2, SSBx3, SSBx4, ...}. The SSB index can be defined from 0 to 63.

[0180] - The terminal receives the SSB resource from the base station based on the CSI-SSB-ResourceSetList (S420).

[0181] -If a CSI-RS reportConfig related to reporting to SSBRI and L1-RSRP is configured, the terminal (beam) reports the best SSBRI and its corresponding L1-RSRP to the base station (S430).

[0182] That is, when the reportQuantity of the CSI-RS reportConfig IE is set to "ssb-Index-RSRP", the terminal reports the best SSBRI and the corresponding L1-RSRP to the base station.

[0183] In addition, when the CSI-RS resource is set in the same OFDM symbol as the SSB (SS / PBCH block) and "QCL-TypeD" is applicable, the terminal can assume that the CSI-RS and the SSB are quasi co-located from the perspective of "QCL-TypeD".

[0184] Here, the QCL TypeD can be meant to be QCL between antenna ports from the perspective of the parameters of spatial Rx. When the terminal receives multiple DL antenna ports in the relationship of QCL Type D, the same receive beam can be applied. Also, the terminal does not expect the CSI-RS to be set in the RE overlapping with the RE of the SSB.

[0185]

[0186] Regarding the CSI-RS usage, i) when the repetition parameter is set for a specific CSI-RS resource set and the TRS_info is not set, the CSI-RS is used for beam management. ii) when the repetition parameter is not set and the TRS_info is set, the CSI-RS is used for the TRS (tracking reference signal). iii) when the repetition parameter is not set and the TRS_info is not set, the CSI-RS is used for CSI acquisition.

[0187] Such repetition parameters can only be set for CSI-RS resource sets linked to L1 RSRP or CSI-ReportConfig that have a "No Report (or None)" report.

[0188] If a terminal receives a CSI-ReportConfig setting where reportQuantity is set to "cri-RSRP" or "none", and the CSI-ResourceConfig for channel measurement (higher layer parameter resourcesForChannelMeasurement) does not include the higher layer parameter "trs-Info", and includes an NZP-CSI-RS-ResourceSet with the higher layer parameter "repetition", then the terminal can consist only of ports (1-port or 2-port) with the same number and the higher layer parameter "nrofPorts" for all CSI-RS resources within the NZP-CSI-RS-ResourceSet.

[0189] When the (higher layer parameter) repetition is set to "ON", it is associated with the terminal's Rx beam sweeping procedure. In this case, when the terminal receives the NZP-CSI-RS-ResourceSet configuration, the terminal can assume that at least one CSI-RS resource in the NZP-CSI-RS-ResourceSet is transmitted to the same downlink spatial domain transmission filter. That is, at least one CSI-RS resource in the NZP-CSI-RS-ResourceSet is transmitted over the same Tx beam. Here, at least one CSI-RS resource in the NZP-CSI-RS-ResourceSet may be transmitted with different OFDM symbols. The terminal does not expect all CSI-RS resources in the NZP-CSI-RS-ResourceSet to receive different periodicities in periodicityAndOffset.

[0190] In contrast, when Repetition is set to "OFF", it is associated with the base station's Tx beam sweeping procedure. In this case, when repetition is set to "OFF", the terminal does not assume that at least one CSI-RS resource in the NZP-CSI-RS-ResourceSet is sent to the same downlink spatial domain transmission filter. That is, at least one CSI-RS resource in the NZP-CSI-RS-ResourceSet is sent via different Tx beams.

[0191] Figure 11 shows an example of a DL BM procedure using CSI-RS. Figure 11a shows the procedure for determining (or improving) the terminal's Rx beam, and Figure 11b shows the procedure for determining the base station's Tx beam. In Figure 11a, the repeat parameter is set to "ON", and in Figure 11b, the repeat parameter is set to "OFF".

[0192] Refer to Figures 11a and 12 to see the determination process of the terminal's Rx beam.

[0193] Figure 12 is a flowchart showing an example of the process for determining the received beam of a terminal.

[0194] The terminal receives an NZP CSI-RS resource set IE from the base station via RRC signaling, which includes a repeating parameter for the upper layer (S610). Here, the repeating parameter is set to "ON".

[0195] The terminal repeatedly receives resources within the CSI-RS resource set that are repeatedly set to "ON" via the same Tx beam (or DL ​​spatial domain transfer filter) of the base station, each with different OFDM symbols (S620).

[0196] The terminal determines its own Rx beam (S630).

[0197] The terminal may omit the CSI report or forward the CSI report, including CRI / L1-RSRP, to the base station (S640). In this case, the reportQuantity in the CSI report config can be set to "No report (or None)" or "CRI and L1-RSRP".

[0198] In other words, if the terminal is repeatedly set to "ON", it is possible to omit CSI reporting.

[0199] Refer to Figures 11b and 13 to see the Tx beam determination process for the base station.

[0200] Figure 13 is a flowchart illustrating an example of the base station's transmission beam determination process.

[0201] The terminal receives an NZP CSI-RS resource set IE containing repeating upper-layer parameters from the base station via RRC signaling (S710).

[0202] Here, the aforementioned repeating parameter is set to "OFF" and is associated with the base station's Tx beam sweeping procedure.

[0203] Furthermore, the terminal receives resources within the CSI-RS resource set that are repeatedly set to "OFF" via different Tx beams (DL spatial domain transfer filters) of the base station (S720).

[0204] Furthermore, the terminal selects (or determines) the best beam (S730) and reports the ID and associated quality information (e.g., L1-RSRP) for the selected beam to the base station (S740).

[0205] In this case, the reportQuantity in the CSI report config can be set to "CRI + L1-RSRP".

[0206] Figure 14 shows an example of resource allocation in the time and frequency domains related to the operation shown in Figure 11.

[0207] In other words, when the CSI-RS resource set is repeatedly set to "ON," multiple CSI-RS resources are repeatedly used, applying the same transmit beam. Conversely, when the CSI-RS resource set is repeatedly set to "OFF," different CSI-RS resources are transferred to different transmit beams.

[0208] <dl bm関連のビーム指示(beam indication)>

[0209] The terminal can receive RRC settings for a list of up to M candidate Transmission Configuration Indication (TCI) states, at least for the purpose of QCL (Quasi Co-location) instruction, where M can be 64.

[0210] Each TCI state can be assigned to a single RS set. At least the ID of each DL RS for spatial QCL purposes (QCL Type D) within the RS set can refer to one of the DL RS types, such as SSB, P-CSI RS, SP-CSI RS, A-CSI RS, etc.

[0211] The initialization / update of DL RS IDs within an RS set used at least for spatial QCL purposes can be performed at least via explicit signaling.

[0212] Table 10 shows an example of a TCI-State IE. A TCI-State IE is associated with the corresponding quasi co-location (QCL) type of one or two DL reference signals (RS).

[0213] [Table 10]

[0214] In Table 10, the bwp-Id parameter indicates the DL BWP on which the RS is located, the cell parameter indicates the carrier on which the RS is located, and the referencesignal parameter indicates the reference antenna port or reference signal containing it that serves as the source of quasi co-location for the target antenna port. The target antenna port may be a CSI-RS, PDCCH DMRS, or PDSCH DMRS. For example, to specify RS information for a QCL reference for an NZP CSI-RS, the corresponding TCI state ID can be specified in the resource configuration information of the NZP CSI-RS. As another example, to specify QCL reference information for a PDCCH DMRS antenna port, the TCI state ID can be specified in the settings of each CORESET. As yet another example, to specify QCL reference information for a PDSCH DMRS antenna port, the TCI state ID can be specified via DCI.

[0215] <QCL(Quasi-Co Location)>

[0216] Antenna ports are defined such that the channels on which symbols are carried on an antenna port can be inferred from the channels on which other symbols on the same antenna port are carried. If the properties of the channels on which symbols are carried on one antenna port can be inferred from the channels on which symbols are carried on another antenna port, then the two antenna ports are said to be in a QC / QCL (quasi co-located or quasi co-location) relationship.

[0217] Here, the channel characteristics include one or more of the following: delay spread, Doppler spread, frequency / Doppler shift, average received power, received timing / average delay, and spatial RX parameter. Here, the spatial Rx parameter refers to a spatial (received) channel characteristic parameter such as angle of arrival.

[0218] The terminal can be configured in a list of up to M TCI-State configurations within the higher-level parameter PDSCH-Config in order to decode the PDSCH with the detected PDCCH having the intended DCI for the terminal and the given serving cell. The number M depends on the UE capability.

[0219] Each TCI-State includes parameters for setting the quasi-co-location relationship between one or two DL reference signals and the DM-RS port of the PDSCH.

[0220] The Quasi co-location relationship is determined by the higher-level parameter qcl-Type1 for the first DL RS and qcl-Type2 (if set) for the second DL RS. For two DL RSs, the QCL type is not the same regardless of whether the references are the same DL RS or different DL RSs.

[0221] The quasi co-location type corresponding to each DL RS is given by the qcl-Type parameter in the higher layer of QCL-Info, and can take one of the following values.

[0222] - "QCL-TypeA": {Doppler shift, Doppler spread, average delay, delay spread}

[0223] - "QCL-TypeB": {Doppler shift, Doppler spread}

[0224] - "QCL-TypeC": {Doppler shift, average delay}

[0225] - "QCL-TypeD":{Spatial Rx parameter}

[0226] For example, if a target antenna port is a specific NZP CSI-RS, that NZP CSI-RS antenna port can be instructed / configured to be QCL-Type A with a specific TRS and QCL-Type D with a specific SSB. A terminal that receives such instructions / configurations can receive the NZP CSI-RS using the Doppler and delay values ​​measured on the QCL-Type A TRS, and apply the received beam used for QCL-Type D SSB reception to the reception of the NZP CSI-RS.

[0227] The UE receives activation commands used to map up to eight TCI states to codepoints in the DCI field "Transmission Configuration Indication".

[0228]

[0229] UL BM determines whether beam reciprocity (or beam correspondence) between the Tx beam and Rx beam can be established or not, depending on the implementation of the terminal. If beam reciprocity between the Tx beam and Rx beam can be established at both the base station and the terminal, the UL beam pair can be aligned via the DL beam pair. However, if beam reciprocity between the Tx beam and Rx beam cannot be established at either the base station or the terminal, a separate process for determining the UL beam pair is required, distinct from the determination of the DL beam pair.

[0230] Furthermore, even if both the base station and the terminal maintain beam association, the base station can use the UL BM procedure to determine the DL Tx beam without requiring the terminal to report its preferred beam.

[0231] UL BM can be executed via beamformed UL SRS transmission, and the applicability of UL BM to an SRS resource set is set by the (higher layer parameter) usage. When usage is set to "BeamManagement (BM)", only one SRS resource can be sent to each of multiple SRS resource sets in a given time instant.

[0232] A terminal can be configured with one or more Sounding Reference Symbol (SRS) resource sets (via upper-layer signaling, RRC signaling, etc.) as defined by the (upper-layer parameter) SRS-ResourceSet. For each SRS resource set, the UE can be configured with K≧1 SRS resources (upper-layer parameter SRS-resource), where K is a natural number, and the maximum value of K is indicated by SRS_capability.

[0233] Similar to DL BM, the UL BM procedure can also be divided into terminal Tx beam sweeping and base station Rx beam sweeping.

[0234] Figure 15 shows an example of an UL BM procedure using SRS. Specifically, Figure 15a shows the Rx beam determination procedure for the base station, and Figure 15b shows the Tx beam determination procedure for the terminal.

[0235] Figure 16 is a flowchart showing an example of an UL BM procedure using SRS.

[0236] The terminal receives RRC signaling (e.g., SRS-Config IE) from the base station, which includes usage parameters (upper layer parameters) set to "Beam Management" (S1010).

[0237] Table 11 shows an example of an SRS-Config IE (Information Element), which is used for SRS forwarding configuration. The SRS-Config IE includes a list of SRS-Resources and a list of SRS-ResourceSets. Each SRS resource set represents a set of SRS-resources.

[0238] The network triggers the transfer of SRS resource sets using the configured aperiodicSRS-ResourceTrigger (L1 DCI).

[0239] [Table 11]

[0240] Table 11 shows that "usage" is a higher-level parameter that indicates whether an SRS resource set is used for beam management or for codebook-based or non-codebook-based transfer. The usage parameter corresponds to the L1 parameter "SRS-SetUse". "spatialRelationInfo" is a parameter that indicates the setting of the spatial relation between the reference RS and the target SRS. Here, the reference RS can be an SSB, CSI-RS, or SRS corresponding to the L1 parameter "SRS-SpatialRelationInfo". The usage is set per SRS resource set.

[0241] The terminal determines the Tx beam to be transferred to the SRS resource based on the SRS-SpatialRelation Info included in the SRS-Config IE (S1020). Here, the SRS-SpatialRelation Info is set for each SRS resource and indicates whether the same beam used for SSB, CSI-RS, or SRS is applied for each SRS resource. In addition, SRS-SpatialRelationInfo may or may not be set for each SRS resource.

[0242] If SRS-SpatialRelationInfo is set for the SRS resource, the same beam used for SSB, CSI-RS, or SRS is applied and transmitted. However, if SRS-SpatialRelationInfo is not set for the SRS resource, the terminal arbitrarily determines the Tx beam and transmits SRS through the determined Tx beam (S1030).

[0243] More specifically, regarding P-SRS where "SRS-ResourceConfigType" is set to "Periodic"

[0244] i) If SRS-SpatialRelationInfo is set to "SSB / PBCH", the UE applies the same spatial domain transfer filter (or one generated from the same filter) as the spatial domain Rx filter used for receiving SSB / PBCH, and transfers the corresponding SRS resource. Or,

[0245] ii) If SRS-SpatialRelationInfo is set to "CSI-RS", the UE will forward SRS resources that have the same spatial domain forwarding filter used for receiving periodic CSI-RS or SP CSI-RS. Or,

[0246] iii) If SRS-SpatialRelationInfo is set to "SRS", the UE applies the same spatial domain transfer filter used for periodic SRS transfers and transfers the corresponding SRS resource.

[0247] The same applies when "SRS-ResourceConfigType" is set to "SP-SRS" or "AP-SRS".

[0248] Furthermore, the terminal may receive or not receive feedback from the base station to the SRS in the following three cases (S1040):

[0249] i) If Spatial_Relation_Info is set for all SRS resources in the SRS resource set, the terminal will transmit SRS on the beam indicated by the base station. For example, if all Spatial_Relation_Info indicate the same SSB, CRI, or SRI, the terminal will repeatedly transmit SRS on the same beam. In this case, the base station selects the Rx beam, corresponding to Figure Ga.

[0250] ii) Spatial_Relation_Info may not be set for all SRS resources within an SRS resource set. In this case, the terminal can freely change the SRS beam during transmission. That is, in this case, the terminal selects the Tx beam, which corresponds to Figure Gb.

[0251] iii) Spatial_Relation_Info can be set for only some of the SRS resources within the SRS resource set. In this case, for the SRS resources for which Spatial_Relation_Info is set, the SRS will be forwarded with the designated beam, and for SRS resources for which Spatial_Relation_Info is not set, the terminal can arbitrarily apply a Tx beam for forwarding.

[0252] NES (Network Energy Saving)

[0253] Energy conservation at base stations is considered important in wireless communication systems, including 3GPP, because it can contribute to building environmentally friendly networks and reducing the operational expenditure (OPEX) of telecommunications operators by reducing carbon emissions. In particular, with the introduction of 5G communication, high transmission rates are required, so base stations must be equipped with more antennas and provide services over wider bandwidths and frequency bands. As a result, energy costs for base stations have reached 20% of the total OPEX, according to recent research. Therefore, 5G systems adopt various technologies to reduce energy consumption under the name of NES (network energy savings), and the standardization of related technologies is expected to continue. Specifically, the recently held Rel-18 meeting discussed the following techniques.

[0254] [Table 12]

[0255] By applying NES technology, base stations can perform operations such as adjusting on / off states over a fixed time interval (duration) on the time axis, adjusting transmit / receive resources for UE-common or UE-specific signals / channels, changing the amount of frequency-axis resources, adjusting transmit power, or turning on / off antenna ports, TRPs (transmission-reception points), etc., in the spatial domain.

[0256] Figure 17 shows an example of the operating procedure for a base station supporting NES technology. Referring to Figure 17, the base station identifies the NES solution(s) to be applied. The NES solution(s) are associated with signal transmission and reception control (e.g., on / off), beam operation, handover procedures, channel measurement, and reporting. Which NES solution(s) to apply can be adaptively selected or predefined based on the current situation (e.g., cell load level, characteristics of connected terminals, etc.). After identifying the NES solution(s), the base station performs signaling for the NES. The specific signaling procedure can vary depending on the identified NES solution(s). For example, the base station may transmit common information for the NES solution(s), or configuration information necessary for NES operation to at least one terminal, or control information for the progress of NES operation to at least one terminal. The base station may also receive capability information related to NES from at least one terminal. Subsequently, the base station performs operations for the NES. At this time, the base station can perform operations for the NES based on the signaling performed earlier. In other words, based on system information, configuration information, and control information transmitted via signaling, the base station can turn on / off the transmission and reception of specific signals, or turn on / off elements of a spatial domain, or adjust resources for the transmission and reception of measurement signals.

[0257] The NES technology can be executed via a procedure as shown in FIG. 17. Examples of NES solutions executable by a procedure as shown in FIG. 17 are as follows.

[0258] · Intra-system energy saving solution: The RAN node requests an adjacent RAN node to switch at least one SSB beam into its deactivated cell, or paging can be performed using a restricted set of beams for inactive state terminals (e.g., stationary terminals).

[0259] · Inter-system energy saving solution: The NG-RAN node having a capacity booster cell can autonomously convert the corresponding cell to an inactive state.

[0260] · SSB-less SCell solution: When no SSB or SMTC (SSB-based RRM measurement timing configuration) setting is provided for the SCell, the terminal can obtain timing references and AGC sources from other serving cells. In FR1 or FR2, the base station can configure intra-band CA or inter-band CA including SSB transmission-less SCell, in which case, SSB / SIB transmission can be triggered by the terminal's WUS (wake up signal). Thereby, since the period of common channels / signals such as SSB increases, the base station is in a sleep state for a longer time.

[0261] • Cell DTX / DRX Solution: To reduce the downlink transmit / uplink receive activity time of a base station, a periodic cell DTX / DRX pattern (e.g., active and inactive periods) can be set commonly for terminals in a cell having the relevant feature. Here, the cell DTX pattern and the cell DRX pattern can be set and activated separately, and up to two cell DTX / DRX patterns can be set per MAC entity. When cell DTX is set and activated, at least one of monitoring for SPS opportunities or monitoring for PDCCH can be interrupted during the cell DTX inactive period. When cell DRX is set and activated, at least one of transmissions on CG resources or SR transmissions can be interrupted during the cell DRX inactive period. Cell DTX / DRX can be activated / deactivated via RRC signaling or L1 group common signaling.

[0262] Parameters such as active duration and cycle can be set for cell DTX / DRX. Active duration is the period during which a terminal waits to receive a PDCCH or SPS opportunity and transmit an SR or CG, and cycle specifies the periodic repetition of active and inactive periods. If both cell DTX and cell DRX are set, parameters such as active duration and cycle are common to both. If the base station recognizes an emergency call or public safety-related service (e.g., MPS or MCS), the network can deactivate or disable the cell DTX / DRX settings to avoid affecting the relevant service. Additionally, at least some overlap is required between the active duration of the terminal's connected mode DRX and the active duration of the cell DTX / DRX. For example, the terminal's connected mode DRX cycle must be a multiple of the cell DTX / DRX cycle, or vice versa.

[0263] • Conditional handover (CHO) solution: A CHO procedure is used while NES technology is applied (e.g., when a cell activates or deactivates cell DTX / DRX), in which the terminal determines whether to execute the handover. In this case, the terminal can use an NES-specific CHO event to execute the CHO on a candidate cell, and the reception of a DCI can be applied as an additional triggering condition for this, which activates the CHO conditions set in the NES event indication.

[0264] • Spatial and power domain adaptation solution: To support gNB for transceiver muting and / or transmit power adaptation, the terminal can be configured to report multiple CSI entries in the CSI report based on multiple sub-configurations. Each sub-configuration corresponds to a spatial domain adaptation pattern (e.g., a subset of available spatial elements) and / or a data channel (e.g., PDSCH) and a power offset between CSI-RS. The application of the spatial and power domain adaptation solution can affect CSI configuration, measurement, and / or reporting behavior.

[0265] CSI measurement and reporting

[0266] Figure 18 shows an example of the procedure for CSI measurement and reporting.

[0267] Referring to Figure 18, the base station transmits configuration information for CSI to the terminal. The configuration information for CSI may include information related to CSI-RS resources or resource sets (e.g., time-frequency resource information, sequence information, power information, etc.), information related to CSI reporting (e.g., reporting item (quantity) information, reporting type information, reporting resource information, codebook information, etc.), and information related to CSI measurement. Here, to assist the base station in transceiver muting and / or transmit power adaptation, the terminal can be configured to report multiple CSI entries in the CSI report based on multiple sub-configurations, where each sub-configuration corresponds to a spatial domain adaptation pattern (e.g., a subset of available spatial elements) and / or a power offset. Furthermore, in relation to CSI reporting, higher-level parameters included in the configuration information (e.g., CSI-ReportConfig) may include a catalog of subconfigurations, each subconfiguration being identified by an identifier (e.g., csi-ReportSubConfigID) and corresponding to a catalog of at least one CSI-RS resource, or a subset of CSI-RS antenna ports, and / or, in addition to power control offset-related parameters (e.g., powerControlOffset) for the CSI-RS resource(s), power offsets for PDSCHs associated with CSI-RS.

[0268] In this case, the settings related to CSI can include multiple sub-settings. This allows the terminal to consider the sub-settings when analyzing the configuration information for CSI to determine CSI-RS resources, CSI-RS port mapping, power offset, codebook type, reporting items, etc. If the terminal is configured with configuration information related to CSI reporting that includes sub-settings (e.g., CSI-ReportConfig), the terminal does not expect the higher-level parameters related to the reporting items (e.g., reportQuantity) to be set to "cri-RSRP", "cri-SINR", "cri-SINR-Index", "cri-RSRP-Index", "none", "ssb-Index-RSRP", "ssb-Index-SINR", "ssb-Index-RSRP-Index", "ssb-Index-SINR-Index", or "tdcp". Also, if the type of CSI reporting is set to semi-persistent CSI reporting or aperiodic CSI reporting, the base station can activate / trigger only some of the sub-settings configured on the terminal via MAC-CE or DCI. In other words, the trigger state for aperiodic CSI reporting can be set as needed, and the activation of semi-static CSI reporting can be controlled by an activation command.

[0269] For example, in relation to the settings for a reporting item, the terminal can determine the CSI-RS port index(s) for each CSI-RS resource based on information related to the sub-setting port-subset (hereinafter referred to as the "port-subset indicator"). The port-subset indicator may include a bitmap for identifying some of the antenna ports for the CSI-RS resource in question. Therefore, the terminal can identify at least one antenna port for the relevant sub-setting based on the position of the bit set to a positive value (e.g., 1) in the port-subset indicator.

[0270] For example, in relation to settings for reporting items, the terminal can determine the codebook type based on the existence of sub-settings. Specifically, if sub-settings are configured for a CSI report, the terminal can exclude settings for at least one codebook type. However, depending on the terminal's capabilities, it may be possible for at least one such codebook type to be configured.

[0271] For example, in relation to the settings for reporting items, power offset values ​​and NZP CSI-RS resource sets can be set for each sub-setting. In this case, the analysis of the NZP CSI-RS resource set for each sub-setting can change depending on whether or not the power offset value and NZP CSI-RS resource set can be set for each sub-setting.

[0272] In determining the CQI, higher-level parameters related to time limits for channel measurements (e.g., timeRestrictionForChannelMeasurements) can be set. In this case, the terminal should derive a channel estimate for determining the CSI based on the latest CSI reference resource. At this time, if the cell DTX to the base station is activated, the cell DTX activation time can be taken into consideration.

[0273] The CSI is derived based on the CSI reference resource. The CSI reference resource is defined as a group of downlink physical resource blocks corresponding to the bandwidth associated with the CSI derived in the frequency domain, and is defined in a single downlink slot determined in the time domain based on higher-level parameters and subcarrier intervals. After receiving the CSI-RS, the terminal should send a CSI report without delay from the CSI reference resource. If sub-configurations are set for the CSI report, the CSI reference resource is considered separately for each sub-configuration.

[0274] If configured to report at least one of the CQI index, PMI, or RI, the terminal can make specific assumptions about the CSI reference resource, such as the symbol positions and number occupied by control signaling, the number of PDSCH and DMRS symbols, the subcarrier interval of the BWP, the bandwidth for CQI reporting, the CP length and subcarrier interval of the reference resource, and the RV (redundancy version), for the purpose of deriving at least one of the CQI index, PMI, or RI. In this case, if sub-configurations are set for CSI reporting, assumptions about the antenna port, EPRE, etc., can be determined based on the sub-configurations.

[0275] Next, the base station transmits at least one CSI-RS. This allows the terminal to receive at least one CSI-RS and perform the measurement. At least one CSI-RS can be transmitted via a CSI-RS resource or resource set configured by the configuration information.

[0276] In this case, if the terminal is set to DRX, the terminal can perform measurements as follows: For example, if the terminal is set to monitor power saving-related control information (e.g., DCI format 2_6) and the DRX-related timer (e.g., drx-onDurationTimer) is not started by a higher-level parameter (e.g., ps-TransmitOtherPeriodicCSI), and the terminal is set to report CSI using the reporting configuration type set by periodic reporting and reporting items set to items other than cri-RSRP and ssb-index-RSRP, then the latest CSI measurement opportunity will occur during the time indicated by drx-onDurationTimer in the DRX-related configuration information (e.g., DRX-Config), other than the DRX activation time or the DRX activation time for the reported CSI. As another example, if a terminal is configured to monitor power saving-related control information (e.g., DCI format 2_6), and a higher-level parameter (e.g., ps-TransmitPeriodicL1-RSRP) prevents drx-onDurationTimer from starting, and the terminal is configured to report L1-RSRP using the reporting configuration type set by periodic reporting and the reporting items set in cri-RSRP, then the latest CSI measurement opportunity will occur during the time indicated by drx-onDurationTimer in the DRX-related configuration information (e.g., DRX-Config), other than the DRX activation time or the DRX activation time for the reported CSI. In addition, the latest CSI measurement opportunity will occur within the DRX activation time for the reported CSI.

[0277] On the other hand, a base station can perform cell DTX / DRX operation. In this case, during the deactivation period of cell DTX, terminals configured for cell DTX do not expect to receive periodic CSI-RS and semi-static CSI-RS as configured by the CSI reporting settings associated with reporting items that include at least RI (rank indicator). When cell DTX is activated for a serving cell, the latest CSI measurement opportunities for semi-static CSI-RS resources or periodic CSI-RS resources occur within the activation period of cell DTX for CSI reporting, as configured by the configuration information associated with CSI reporting (e.g., CSI-ReportConfig) associated with reporting items that include at least RI.

[0278] A terminal that receives at least one CSI-RS determines the CSI. That is, the terminal performs the CSI calculation. At this time, the terminal can perform the CSI calculation based on the CSI processing criteria. The terminal can specify the number of concurrently supported CSI calculations, i.e., the number of CSI processing units (CPUs) that can proceed simultaneously, NCPU. The terminal can determine the number of CPUs for a given CSI report based on at least one of the following: NCPU, the number of CPUs for each CSI report, the number of CPUs currently occupied, or the settings of the report item. For example, for configuration information associated with a CSI report (e.g., CSI-ReportConfig) that includes a report item parameter (e.g., reportQuantity) that is not set to "none", the CPUs can be occupied between at least one OFDM symbol, where the number of at least one symbol can be determined based on the CSI-RS resources or CSI-IM resources associated with the sub-configuration.

[0279] When the configuration information related to the CSI report (e.g., CSI-ReportConfig) includes multiple sub-configurations, the number of CPUs occupied by the CSI report is determined based on the number of CSI-RS resources corresponding to the sub-configurations. At this time, the number of CSI-RS resources can be determined based on the number of times the configuration information related to the CSI report (e.g., CSI-ReportConfig) is referred to or the number of sub-configurations referring to the corresponding CSI-RS resources.

[0280] The terminal that determines the CSI sends a CSI report to the base station. The terminal can send the CSI(es) for at least one sub-configuration according to the report item parameter (e.g., reportQuantity) set for the configuration information related to the CSI report (e.g., CSI-ReportConfig). For example, the CSI report can include at least one of PMI, CQI, RI, CRI, SSBRI, LI, RSRP. At this time, the CSI report can include a part 1 CSI report and a part 2 CSI report. Also, the CSI report can be sent via at least one of PUCCH or PUSCH.

[0281] When the terminal multiplexes a CSI report including a part 2 CSI report on a PUCCH resource, the terminal determines the number of PUCCH resources and the number of PRBs for the PUCCH resources or the number of part 2 CSI reports under the assumption that each CSI report or each CSI sub-report included in the CSI report indicates rank 1 or rank combination {1, 1}. When the upper layer parameter related to the CSI report mode (e.g., csi-ReportMode) is set to "Mode2", the terminal determines the number of PUCCH resources and the number of PRBs for the PUCCH resources or the number of part 2 CSI reports under the assumption that each CRI of the CSI report is related to a resource pair.

[0282] If a CSI report in PUSCH contains two parts, the terminal may omit part of the Part 2 CSI. The omission of Part 2 CSI follows priority order. Unless the corresponding CSI report contains at least one CSI sub-report including Part 2 that corresponds to a sub-configuration from a catalog of sub-configurations provided by a higher-level parameter (e.g., csi-ReportSubConfigList) included in the information related to the CSI report (e.g., CSI-ReportConfig), the terminal should omit all information at that priority level when omitting Part 2 CSI information for a particular priority level.

[0283] For information related to a CSI report, including a catalog of sub-configurations (e.g., CSI-ReportConfig), and associated reporting configurations, the following processing is possible: For a corresponding CSI report containing at least one CSI sub-report, Part 2 CSI omission is performed at the sub-configuration level within the same priority level. Here, sub-configurations with lower index values ​​have higher priority.

[0284] If any CSI report consists of two parts, the terminal may omit a portion of Part 2 CSI. The omission of Part 2 CSI follows a priority order. For a given CSI report that includes at least one CSI sub-report for information related to the CSI report, including a catalog of sub-configurations (e.g., CSI-ReportConfig), and associated reporting settings, the omission of Part 2 CSI is defined in Section 5.2.3. Part 2 CSI is omitted starting from the lowest priority level down to a Part 2 CSI coding rate that is less than or equal to the coding rate set by the higher-level parameter (e.g., maxCodeRate).

[0285] Furthermore, when a CQI request field within a DCI triggers a CSI report(s) in a PUSCH, the first uplink symbol carrying the CSI report(s) will not precede any symbols identified after a certain interval from the last symbol of the PDCCH that carried the DCI. This can be understood as ensuring the CSI calculation time. In this case, if multiple sub-settings are configured for the CSI report, the start position of the aforementioned interval can be determined based on all triggered sub-settings.

[0286] Specific Examples of the Disclosure

[0287] This disclosure relates to a technique for reporting CSIs based on sub-configurations in a wireless communication system. In particular, this disclosure relates to a technique for transmitting CSIs for multiple sub-configurations, i.e., CSI sub-reports, taking overhead into consideration, and aims to propose various embodiments for transmitting CSIs for sub-configurations.

[0288] A base station can operate technologies for NES purposes, such as adjusting the on / off state of UEs over a certain time interval (duration), adjusting transmit / receive resources for UE-common or UE-specific signals / channels, changing the amount of resources on the frequency axis, adjusting transmit power, or turning on / off antenna ports (APs), TRPs, etc., in the spatial domain. In this disclosure, the listed technologies are referred to as "NES technologies" or "NES_tech," and the state in which at least one of the NES_techs is applied is referred to as "NES mode" or "NES state." For example, an example of state control of antenna elements by NES mode is shown in Figures 19a to 19c below. Referring to Figures 19a to 19c, energy saving is possible by adaptively turning on / off some of the antenna elements among multiple antenna elements connected to multiple TxRUs (transmit radio units). The base station can also inform terminals which NES_tech(etc.) applies to each NES_tech or NES_tech group [Approach 1], and can pre-configure corresponding NES_tech or NES_tech groups(etc.) for each code-point of a specific indicator [Approach 2]. Here, the specific indicator can be indicated by DCI or MAC CE, or configured by higher-level signaling.

[0289] In Approach 1, if at least one NES_tech is applied to a terminal, the state can be defined as an NES mode or NES state, and further, different NES modes or different NES states can be treated depending on which NES_tech is applied. An NES mode or NES state means whether at least one NES technology is applicable, or can be used as a concept that more indicates which NES technologies are applied. When an NES mode or NES state more indicates which NES technologies are applied, different NES modes or different NES states can include different combinations of NES_tech. In Approach 2, for example, if a 1-bit indicator is used, "0" can indicate that the corresponding NES_tech is not applied, and "1" can indicate that at least one NES_tech is applied. In this case, if "1" is indicated via the indicator, the state can be defined as an NES mode or NES state. As another example, when a 2-bit directive is used, "00" can indicate that the corresponding NES_tech is not applied, "01" indicates that at least one NES_tech_A is applied, "10" indicates that at least one NES_tech_B is applied, and "11" indicates that at least one NES_tech_C is applied. In this case, if a code point other than "00" is indicated via the directive, the state can be defined as NES mode or NES state. Furthermore, the terminal can determine that NES state #1 is confirmed if "01" is confirmed, NES state #2 if "10" is confirmed, and NES state #3 if "11" is confirmed. Thus, whether and / or what kind of NES state is being used can be distinguished by code point.

[0290] For NES purposes, a base station can turn on / off certain spatial elements (e.g., APs, active transmit / receive chains, panels, or TRPs) or adjust the power values ​​for downlink signals / channels. To dynamically apply such diverse NES techniques in the spatial and power domains, a base station can link CSI-RS resources or resource sets with different APs for a single CSI report setting (e.g., CSI-ReportConfig), or link multiple power offsets (e.g., the powerControlOffset parameter, which is the power offset value between PDSCH and CSI-RS, the powerControlOffsetSS parameter, which is the power offset value between SSS and CSI-RS, etc.).

[0291] On the other hand, at least one of the following CSI frameworks can be introduced.

[0292] -Framework #1: Multiple CSI-RS resource sets are linked to a single CMR (channel measurement resource) or IMR (interference measurement resource) within CSI-ReportConfig. Here, the CMR can be configured using the resourcesForChannelMeasurement parameter, and the IMR can be configured using the csi-IM-ResourcesForInterference or nzp-CSI-RS-ResourcesForInterference parameter. For example, resource set #1 and resource set #2 may be linked to a CMR, with CSI-RS resources belonging to resource set #1 consisting of 16 APs (antenna ports, APs) and CSI-RS resources belonging to resource set #2 consisting of 8 APs.

[0293] -Framework #2: When a linked CSI-RS resource set is configured for one CMR or one IMR within CSI-ReportConfig, at least one CSI-RS resource(s) with different attributes such as the number of APs and / or power offset will be configured within that CSI-RS resource set. For example, for CSI-RS resource set #1 configured for a CMR, CSI-RS resource #1 belonging to CSI-RS resource set #1 may be set to 16 APs, and CSI-RS resource #2 belonging to the same set may be set to 8 APs. For example, for CSI-RS resource set #1 configured for a CMR, CSI-RS resource #1 belonging to CSI-RS resource set #1 may be set to power offset #1, and CSI-RS resource #2 belonging to the same set may be set to power offset #2.

[0294] -Framework #3: If a single CSI-RS resource set linked to a single CMR or IMR is configured within CSI-ReportConfig, some or all of the CSI-RS resources within that set can be configured to multiple AP counts and / or power offset values. For example, for CSI-RS resource set #1 configured for a CMR, CSI-RS resource #1 belonging to CSI-RS resource set #1 can be configured to a maximum of 16 APs, and a CSI report utilizing at least one of these APs can be configured. Alternatively, CSI-RS resource #2 belonging to the same CSI-RS resource set #1 can be configured to multiple power offset values, and a CSI report utilizing all or some of the power offsets can be configured.

[0295] The CSI reporting method can be defined for the aforementioned CSI framework through at least one of the following options.

[0296] -Option #1: A single CSI report can include all CSIs that take into account multiple AP values ​​and / or multiple power offset values ​​set in a single CSI report. Alternatively, a single CSI report can include a CSI that takes into account multiple AP values ​​and / or multiple power offset values ​​determined via the base station settings / instructions. In this case, the AP values ​​and / or power offset values ​​set / instructed via the base station are only a portion of the AP values ​​and / or power offset values ​​set in the relevant CSI report.

[0297] -Option #2: Even if multiple AP values ​​and / or multiple power offset values ​​are set in a single CSI report, a CSI(et) that considers a single AP value and / or a single power offset value via base station settings / instructions may be included in a single CSI report.

[0298] -Option #3: Even if multiple AP values ​​and / or multiple power offset values ​​are set in a single CSI report, a CSI(etc.) that takes into account some AP values ​​and / or some power offset values ​​through terminal judgment / decision / selection based on criteria set or defined by the base station may be included in a single CSI report.

[0299] A configuration for CSI reporting (e.g., CSI-ReportConfig) can contain more than 1, L sub-configurations, each of which can correspond to either a spatial domain adaptation pattern or a power domain adaptation pattern.

[0300] Here, the spatial domain adaptation pattern can correspond to a specific number of APs or AP on / off patterns, or to a specific CSI-RS power value (e.g., the CSI-RS power value determined by the powerControlOffsetSS parameter, which is the power offset value between SSS and CSI-RS, because if some antenna elements corresponding to one AP are turned off, it can affect the CSI-RS power value). For example, when applying framework #2, the number of A1 APs or the P1 power value can be set for CSI-RS index #n1 belonging to the resource set, and the number of A2 APs or the P2 power value can be set for CSI-RS index #n2 belonging to the same resource set. In this case, by setting sub-configuration index #s1 to be linked to CSI-RS index #n1 and sub-configuration index #s2 to be linked to CSI-RS index #n2, different spatial domain adaptation patterns can be set for each sub-configuration. When applying Framework #3 method, if the number of A1 APs (or P1 / P2 power values) is set for CSI-RS index #n1 belonging to the resource set, the number of A1 APs (or P1 power values) will be linked to sub-configuration index #s1, and the number of A2 APs (or P2 power values) which are less than the number of A1 APs that make up CSI-RS index #n1 will be linked to sub-configuration index #s2. This allows different spatial domain adaptation patterns to be set for each sub-configuration.

[0301] Furthermore, a power domain adaptation pattern can mean that the power offset value (e.g., the powerControlOffset parameter, which is the power offset value between PDSCH and CSI-RS, and the powerControlOffsetSS parameter, which is the power offset value between SSS and CSI-RS, etc., are determined by these parameters) is varied. For example, when applying framework #2, a P1 power value can be set for CSI-RS index #n1 belonging to the resource set, and a P2 power value can be set for CSI-RS index #n2 belonging to the same resource set. In this case, by setting sub-configuration index #s1 to be linked to CSI-RS index #n1 and sub-configuration index #s2 to be linked to CSI-RS index #n2, different power domain adaptation patterns can be set for each sub-configuration.

[0302] Furthermore, when applying Framework #3, P1 power values ​​and P2 power values ​​can be set for CSI-RS index #n1 belonging to the resource set. In this case, by setting the sub-configuration index #s1 to be linked to the P1 power value and the sub-configuration index #s2 to be linked to the P2 power value, different power domain adaptation patterns can be set for each sub-configuration.

[0303] By utilizing one of the aforementioned options #1 / 2 / 3, the terminal can feed back a CSI report to the base station that includes CSIs (ar) corresponding to N sub-settings (ar) that are between 1 and L out of L sub-settings.

[0304] As described in options #1 and #3 above, a single CSI report may include CSIs (etc.) corresponding to multiple AP values ​​and / or multiple power offset values ​​of a terminal. This is intended to maintain an efficient communication state with the terminal after the base station's NES operation and can be used to pre-verify the effects of AP number adjustment and / or power adjustment before performing the NES operation. However, as described above, when sub-configuration-specific CSIs are fed back, the amount of CSI information compared to the existing CSI report increases, which can significantly increase the payload size. Furthermore, the increased payload size increases the amount of uplink resources required for CSI reporting, thus reducing the amount of resources required for data transmission over the uplink. Therefore, this disclosure aims to propose a technique that supports the feedback of CSI information corresponding to multiple AP values ​​and / or multiple power offset values ​​of a terminal for a single CSI report, and reduces the feedback overhead. Hereinafter in this disclosure, " / " means "and," "or," or "and / or" depending on the context.

[0305] [Example #1] A CSI reporting method that reduces overhead when a terminal includes CSIs (etc.) corresponding to multiple AP values ​​and / or multiple power offset values ​​in a single CSI report, by configuring at least one occasion on which the relevant CSI is carried and ensuring that the information included in each occasion is different.

[0306] In this disclosure, the situations in which a terminal should carry CSIs corresponding to multiple AP values ​​and / or multiple power offset values ​​for a single CSI report are as follows. However, the embodiments of this disclosure are not limited to the situations described below. In the following description, “carrying” can be understood as “transmitting” the CSIs or “mapping” the signals representing the CSIs or “cSIs” through the relevant opportunity or resource.

[0307] As in Option #1, if a single CSI report includes CSIs that take into account multiple AP values ​​and / or multiple power offset values ​​set in a single CSI report, then CSIs corresponding to multiple AP values ​​and / or multiple power offset values ​​can be transmitted through a single CSI report. Alternatively, as in Option #1, if a single CSI report includes CSIs that take into account multiple AP values ​​and / or multiple power offsets via base station settings / instructions, then CSIs corresponding to multiple AP values ​​and / or multiple power offset values ​​can be transmitted through a single CSI report. In other words, multiple CSIs corresponding to multiple sub-settings, i.e., CSI sub-reports, can be transmitted.

[0308] In this case, the AP value and / or power offset value set / instructed via the base station is part of the AP value and / or power offset value set in the corresponding CSI report. Alternatively, as in option #3, even if multiple AP values ​​and / or multiple power offset values ​​are set in a single CSI report, if a CSI that takes into account some AP values ​​and / or some power offset values ​​through the terminal's judgment / decision / selection, based on criteria set or defined in advance by the base station, is included in a single CSI report, then CSIs corresponding to multiple AP values ​​and / or multiple power offset values ​​can be transmitted via a single CSI report. Alternatively, by combining options #1 and #3, if a CSI that considers multiple AP values ​​and / or multiple power offset values ​​(e.g., some of the AP values ​​and / or power offset values ​​set in the relevant CSI report) via the base station's settings / instructions includes a CSI that considers some of the AP values ​​and / or some of the power offset values ​​determined / selected by the terminal based on criteria pre-configured by the base station or pre-defined criteria, then CSIs corresponding to multiple AP values ​​and / or multiple power offset values ​​can be transmitted via a single CSI report.

[0309] Figure 20 illustrates an example of a procedure for reporting CSIs for sub-configuration on multiple occasions according to one embodiment of the present disclosure. Figure 20 illustrates how this is performed by a terminal.

[0310] Referring to Figure 20, in step S2001, the terminal receives configuration information for the CSI report. The configuration information may include information related to the CSI-RS resource or resource set, AP count, power offset, etc., associated with the CSI report. The configuration information may also include multiple sub-configurations, and the sub-configurations are associated with different AP count subsets or power offset values. Here, the configuration information may include a catalog of multiple sub-configurations, the AP count subsets may be represented in bitmap format, and the power offset value may be represented in the form of a sum of a base value and a difference value.

[0311] In step S2003, the terminal generates multiple CSIs based on sub-configurations included in the CSI reporting configuration. Specifically, the terminal receives at least one CSI-RS via a CSI-RS resource linked to the configuration information for CSI reporting, and can use the received at least one CSI-RS to measure a channel or interference. The terminal can then generate at least one CSI containing at least one item indicated by the configuration information. For example, the terminal can generate CSIs for each sub-configuration.

[0312] In step S2005, the terminal determines multiple opportunities for a CSI. The terminal determines multiple opportunities to send a CSI for a sub-configuration of a single CSI report. In various embodiments, the terminal can determine multiple opportunities based on configuration information for a CSI report. Multiple opportunities can be indicated by the configuration information or derived from resources indicated by the configuration information. For this purpose, the terminal can verify or obtain additional information necessary to determine the multiple opportunities.

[0313] In the S2007 step, the terminal transmits a CSI. In other words, the terminal transmits a CSI through multiple opportunities. At this time, the information transmitted through each opportunity is either a CSI corresponding to one of the sub-configurations, or a part of a CSI. That is, each opportunity can correspond to one sub-configuration, or each opportunity can correspond to a part of a combination of CSIs (e.g., a common part of a CSI).

[0314] As illustrated in the embodiment described with reference to Figure 20, multiple CSIs can be transmitted through multiple devices. Hereinafter, this disclosure describes an embodiment in which multiple devices are set up / directed to carry a CSI(et al.) corresponding to a single CSI report.

[0315] [Example #1-1-1] For P / SP (periodic / semi-persistent) CSI reports, the reporting period and the slot index on which each periodic report is executed can be set / instructed using at least one parameter of the relevant configuration information (e.g., reportSlotConfig and / or reportSlotOffsetList). Specifically, for (on PUCCH) P(periodic)-CSI reports and SP(semi-persistent)-CSI reports in PUCCH, the period and offset can be set by the reportSlotConfig parameter. For (on PUCCH) SP-CSI reports in PUCCH, the period is set by the reportSlotConfig parameter, and the offset can be determined by instructing one of several candidate values ​​set by the reportSlotOffsetList parameter via the DCI that activates the relevant PUCCH. In this example, N slots belonging to periods can be defined as a set of multiple opportunities on which a CSI(et al.) corresponding to a single CSI report is placed. In other words, a single set can contain N opportunities. To this end, an agreement can be defined between the base station and the terminal regarding the starting point of the N periods. For example, it is possible to group N periods into a single set based on a specific SFN index (e.g., SFN index 0). As another example, it is possible to group N periods into a single set based on a specific slot index (e.g., in the case of SP-CSI reporting, the slot where an activated DCI or MAC-CE was received, or the slot 3 msec after the transmission of the corresponding HARQ-ACK following the MAC-CE reception). This allows N periods from a reference point to be determined into one set, and the next N periods to be determined into another set.

[0316] According to Example #1-1-1, the terminal receives information from the base station related to the CSI reporting cycle and the slot index on which each cycle-specific report is performed, and can determine multiple opportunities based on the received information. Specifically, the terminal can select a number of slots (e.g., N slots) from the cycle-specific slots indicated by the received information that are necessary to send a CSI sub-report containing a CSI for a sub-setting of one CSI report, and can send the CSI using the selected slots.

[0317] [Example #1-1-2] For P / SP CSI reports, multiple slots can be set as resources that can carry CSIs on a periodic basis. For example, if the reporting period is set to P and the offset value is set to Y, then in addition to the Y-th slot within the period, the Y+K, Y+2×K, ..., Y+M×K-th slots can be designated as resources that can carry CSIs. Here, the K and M values ​​can be set in advance; for example, the K value can be set to be the same as the Y value. In this case, the N slots set as resources that can carry CSIs can be defined as a set of multiple opportunities on which a single CSI(etc.) corresponding to one CSI report can be carried. That is, one set can contain N opportunities. Agreements between the base station and the terminal for these N starting points can be defined. In this case, if M and N are the same, the slots that can carry CSIs within one reporting period can form one set. Whether M and N are different or the same, it is possible to group N slots into a single set based on a specific SFN index (e.g., SFN index 0). Another example is to group N slots into a single set based on a specific slot index (e.g., in the case of SP-CSI reporting, the slot that received an active DCI or MAC-CE, or the slot 3 msec after the transmission of the corresponding HARQ-ACK following the MAC-CE reception). This allows the N slots from the reference point to be grouped into one set, and the next N slots to be grouped into another set.

[0318] According to Example #1-1-2, the terminal can receive information from the base station related to the CSI reporting cycle and the starting slot position of the cycle (e.g., offset). The terminal can also confirm information related to the number and interval of slots for CSI reporting within a single cycle. This allows the terminal to determine multiple opportunities based on the received and confirmed information. Specifically, the terminal can select a number of slots (e.g., N slots) from the slots for CSI reporting contained within at least one cycle that are necessary to transmit a CSI for a sub-configuration of one CSI report, and transmit the CSI using the selected slots.

[0319] [Example #1-1-3] For an AP (aperiodic) CSI report, multiple opportunities corresponding to a single CSI report can be indicated by allocating multiple PUSCH resources using a UL grant. For example, in the case of a UL grant that does not schedule a UL-SCH, the offset K value from the slot n to which the UL grant is sent can be indicated by parameters such as reportSlotOffsetListDCI-0-1 or reportSlotOffsetListDCI-0-2. Alternatively, in the case of a UL grant that schedules a UL-SCH, the K2 value set in the TDRA table can be indicated. In this case, the CSI report information can be placed in the PUSCH within the slot indicated by the offset K or K2 value. In this example, N PUSCHs can be allocated at once via a UL grant. For example, N PUSCHs can be scheduled at once at intervals of X slots from the slot indicated by the offset K or K2. Here, the X value is, for example, 1, and can be predefined, set by higher-level signaling, or indicated via DCI. Another example is the multi-PUSCH scheduling DCI introduced in Rel-16 / Rel-17, which allows for the allocation of N PUSCHs at once.

[0320] According to Example #1-1-3, the terminal can receive a UL grant from the base station containing information related to multiple slots for CSI reporting, and can transmit a CSI using the opportunity in the slot determined based on the information contained in the UL grant. To this end, the terminal can check the information related to the slot intervals containing the opportunities, select as many slots as necessary to transmit a CSI (e.g., N slots) based on the slot intervals, and transmit a CSI using the selected slots.

[0321] Next, this disclosure describes embodiments of how a CSI is constructed for each occasion, given that a CSI(et al.) corresponding to a single CSI report can be placed on N occasions. The embodiments described below relate to how CSI sub-reports are mapped to multiple occasions.

[0322] N opportunities can be set / indicated by Example #1-1-1, Example #1-1-2, or Example #1-1-3. Alternatively, it can be indicated via DCI, group-common DCI, or MAC-CE whether the relevant N opportunities are applicable, and the N opportunities can be applied only for a certain period of time after the indication. As mentioned above, if a terminal should include CSIs(etc.) corresponding to multiple AP values ​​and / or multiple power offset values ​​for a single CSI report, each CSI can be indexed. For example, if the CSI for AP number N1 and power offset A1 is indexed to CSI#1, the CSI for AP number N2 and power offset A2 to CSI#2, and the CSI for AP number N3 and power offset A3 to CSI#3, the CSI overhead for each opportunity can be reduced by sending different CSIs #1 / 2 / 3 for each opportunity corresponding to a single CSI report. Here, the N1 / N2 / N3 values ​​are the same or different, and the A1 / A2 / A3 values ​​are the same or different. In the following description, an example is presented in which three CSIs correspond to a single CSI report, but the embodiments described later can also be applied when a different number of CSIs correspond to a single CSI report. For example, each of the three CSIs described later can correspond to a CSI sub-setting. In this embodiment, the CSI index linked for each occasion can be determined by a rule (e.g., in ascending or descending order of the index) or can be set / defined in advance.

[0323] [Example #1-2-1] Individual CSIs can be included for each occasion. For example, if N is 3, CSI #1 can be included for the first occasion, CSI #2 for the second occasion, and CSI #3 for the third occasion. According to Example #1-2-1, the terminal can determine multiple occasions and transmit the CSIs in a specified order for the determined occasions.

[0324] [Example #1-2-2] Common information for multiple CSIs can be included on a specific occasion, and the remaining information for each individual CSI can be included on the remaining occasions. Here, common information can be understood as items having the same value. That is, according to Example #1-2-2, the terminal can determine multiple occasions, send a CSI sub-report containing information with common values ​​for the CSIs on one occasion, and send CSI sub-reports containing the remaining information excluding the information with common values ​​for each CSI on each occasion in a specified order.

[0325] For example, if N is 4, CSI is set to CRI+RI+LI+PMI+CQI, and the common information is RI, then the RI values ​​for CSI#1 / 2 / 3 can be entered in the first opportunity, the CRI+LI+PMI+CQI information excluding RI from CSI#1 can be entered in the second opportunity, the CRI+LI+PMI+CQI information excluding RI from CSI#2 can be entered in the third opportunity, and the CRI+LI+PMI+CQI information excluding RI from CSI#3 can be entered in the fourth opportunity. In this case, the position of the opportunity in which the common information is entered can be predetermined or set by higher-level signaling. Furthermore, which item the common information is can be predetermined or set by higher-level signaling.

[0326] [Example #1-2-3] Baseline information (e.g., mean, minimum, maximum, median) for multiple CSIs can be included on a specific occasion, and differential values ​​from the baseline information for each individual CSI can be included on the remaining occasions. That is, according to Example #1-2-3, the terminal can determine multiple occasions, transmit a representative CSI or reference CSI containing representative values ​​(e.g., baseline values) for the items included in the CSI on one occasion, express the values ​​of the items included in each CSI as relative values ​​compared to the representative values, and transmit CSIs containing at least one relative value on each occasion in a specified order.

[0327] For example, if N is 4 and CSI is set to CRI+RI+LI+PMI+CQI, then the first opportunity may include baseline information for each of the CRI / RI / LI / PMI / CQI components of CSI#1 / 2 / 3, the second opportunity may include the difference values ​​from the baseline information for each of the CRI / RI / LI / PMI / CQI components corresponding to CSI#1, the third opportunity may include the difference values ​​from the baseline information for each of the CRI / RI / LI / PMI / CQI components corresponding to CSI#2, and the fourth opportunity may include the difference values ​​from the baseline information for each of the CRI / RI / LI / PMI / CQI components corresponding to CSI#3. Here, the location of the opportunity where common information is included can be predefined or set by higher-level signaling.

[0328] Additionally, combinations between Examples #1-2-2 and #1-2-3 are also possible. For example, among CRI / RI / LI / PMI / CQI, RI can be placed as common information in the first instance, baseline information for the remaining CRI / LI / PMI / CQI can be placed in the first instance, and the difference values ​​from the baseline information for each of the individual CRI / LI / PMI / CQI corresponding to the individual CSI can be placed in the remaining instances.

[0329] [Example #1-2-4] By including all CSIs in each instance and prioritizing information corresponding to a specific CSI index, a relatively large amount of content is transmitted relative to the information corresponding to the specific CSI index, and the information corresponding to the remaining CSI index can be abbreviated or at least partially omitted. In this case, high-priority CSIs are transmitted using a relatively large number of bits, and the remaining CSIs are transmitted using a relatively small number of bits. At this time, the specific CSI index is different for each instance. That is, according to Example #1-2-4, the terminal determines multiple instances and generates a CSI subreport to be transmitted for each instance by combining the CSIs. In generating each CSI subreport, a significant CSI is defined, and the significant CSI is represented with a relatively large number of items and / or a higher resolution compared to other CSIs. The terminal can then transmit the generated CSI subreports in a specified order for each instance.

[0330] For example, if N is 3 and CSI is set to CRI+RI+LI+PMI+CQI, then on the first occasion, all items of CSI#1 and only CRI+RI of the remaining CSI#2 / 3 may be included; on the second occasion, all items of CSI#2 and only CRI+RI of the remaining CSI#1 / 3 may be included; and on the third occasion, all items of CSI#3 and only CRI+RI of the remaining CSI#1 / 2 may be included. As another example, if N is 3, then on the first occasion, all of the WB (wideband) information (e.g., PMI and / or CQI) and SB (sub-band) information (e.g., PMI and / or CQI) for CSI#1 may be included, and only the WB information for the remaining CSI#2 / 3 may be included; on the second occasion, all of the WB and SB information for CSI#2 may be included, and only the WB information for the remaining CSI#1 / 3 may be included; and on the third occasion, all of the WB and SB information for CSI#3 may be included, and only the WB information for the remaining CSI#1 / 2 may be included. Here, the WB information may include WB PMI and / or WB CQI, and the SB information may include SB PMI and / or SB CQI.

[0331] [Example #1-2-5] Compressed information for multiple CSIs may be included on a specific occasion, and information for each individual CSI may be included on the remaining occasions. For example, if N is 4, information for all CSIs #1 / 2 / 3 may be included on the first occasion, but compressed information for each CSI may be included, CSI #1 may be included on the second occasion, CSI #2 on the third occasion, and CSI #3 on the fourth occasion. According to Example #1-2-5, the terminal can determine multiple occasions, generate a compressed CSI subreport by integrating the CSIs, and transmit the compressed CSI subreport and the CSI subreports containing each CSI in a specified order on each occasion. In this disclosure, compressed information may also be referred to as abbreviated information, representative information, integrated information, or other terms having equivalent technical meaning.

[0332] Here, compression can be performed by methods such as configuring the CSI with only WB PMI and / or CQI without SB PMI and / or CQI, separating granularity for time domain / frequency domain / spatial domain basis, omitting some information, or configuring it with baseline values ​​and difference values. Alternatively, in the case of beam management-related reports such as L1-RSRP or L1-SINR, compression can be performed by reducing the number of CRI / RSRP / SINR values ​​for each CSI index. In this case, the location where compressed information for multiple CSIs is included can be predefined or set by higher-level signaling.

[0333] [Example #1-3] For a CSI reporting setting with at least one sub-setting configured, the reporting cycle for each sub-setting and the slot index in which the report is executed in each cycle can be set / instructed.

[0334] For P-CSI and SP-CSI reports on PUCCH, the period and offset can be set by parameters in the configuration information related to the report (e.g., reportSlotConfig). In this case, the relevant parameters can be set for each sub-configuration. When setting the relevant parameters for each sub-configuration, the period / offset values ​​can be set independently for each sub-configuration, or they can be set using relative values ​​to a specific sub-configuration. For example, if the period is set to be the same for all sub-configurations, the reportSlotConfig parameter is set for sub-configuration #0, and a relative offset (e.g., 2 slots) is set for sub-configuration #1, the terminal can send a CSI corresponding to sub-configuration #0 in slot n and a CSI corresponding to sub-configuration #1 in slot n+2.

[0335] For SP-CSI reports on PUCCH, the period is set by the first parameter of the reporting configuration information (e.g., reportSlotConfig), and the offset can be set by specifying one of several candidate values ​​set by the second parameter of the reporting configuration information (e.g., reportSlotOffsetList) via DCI to activate PUCCH. The reportSlotConfig and / or reportSlotOffsetList parameters can be set individually for each sub-configuration. When setting these parameters for each sub-configuration, the period / offset values ​​can be set independently for each sub-configuration, or they can be set using relative values ​​to a specific sub-configuration. For example, if the reportSlotOffsetList#0 parameter is set in sub-setting #0 and reportSlotOffsetList#1 is set in sub-setting #1, when the k-th offset value is indicated via the activation DCI, the terminal can send the CSI corresponding to sub-setting #0 through the slot corresponding to the k-th element of reportSlotOffsetList#0 and the CSI corresponding to sub-setting #1 through the slot corresponding to the k-th element of reportSlotOffsetList#1. As another example, if the reportSlotOffsetList parameter is set in sub-setting #0 and a relative offset (e.g., 2 slots) is set in sub-setting #1, when the k-th offset value is indicated via the activation DCI, the terminal can send the CSI corresponding to sub-setting #0 through the slot corresponding to the k-th element of reportSlotOffsetList (e.g., slot m) and the CSI corresponding to sub-setting #1 through slot m+2.

[0336] In the embodiment described above, the number of machines N and / or the positions of the slots constituting each machine and / or the reporting cycle and / or reporting offset can be changed to a method in which multiple candidate values ​​are set in advance and one of the candidate values ​​is indicated via DCI or MAC CE. Here, DCI can include UE-specific DCI, UE group-common DCI, or cell-common DCI.

[0337] In Examples #1-2-1 to #1-2-5, in order to reduce mismatches in CSI between base stations and terminals, information indicating which CSI index information should be included at each occasion may be included in the CSI report. For example, if CSI #2 information is included at the second occasion, the terminal can generate a CSI report that includes information related to the corresponding index #2 and transmit it to the base station. For example, information related to the CSI index may be included in CSI Part 1.

[0338] [Example #2] When a terminal includes CSIs (etc.) corresponding to multiple AP values ​​and / or multiple power offset values ​​for a single CSI report, a solution is proposed to set up at least one occasion in which the relevant CSI is placed, and to control the resource amount and / or included information items differently for each occasion.

[0339] In the aforementioned Example #1, it was assumed that the time / frequency resources allocated to each opportunity were the same. However, by allocating relatively larger time / frequency resources to specific opportunities that can carry a relatively larger amount of CSI, it is possible to improve the stability of CSI reporting and provide more information to the base station.

[0340] Figure 21 illustrates an example of a procedure for reporting CSIs for sub-configurations on multiple occasions with different resource sizes according to one embodiment of the present disclosure. Figure 21 illustrates how this is performed by a terminal.

[0341] Referring to Figure 21, in step S2101, the terminal identifies multiple opportunity types. Here, the types are distinguished based on the amount of resources allocated to the opportunity (e.g., the number of RE / PRB / OFDM symbols / carriers). That is, one opportunity may be set to a relatively larger amount of resources than another. The type of opportunity can be indicated / set directly or indirectly through configuration information for the opportunity, such as configuration information related to CSI reporting.

[0342] In step S2103, the terminal transmits a first CSI subreport on a Type-1 occasion. The first CSI subreport transmitted on a Type-1 occasion may contain information on more items or at least some of the information contained in multiple CSIs compared to a Type-2 occasion. In this case, at least some of the information contained in the first CSI subreport may be transmitted in a compressed state.

[0343] In step S2105, the terminal transmits a second CSI subreport on a Type-2 occasion. The second CSI subreport transmitted on a Type-2 occasion may contain information on fewer items or at least some of the information contained in a single CSI compared to a Type-1 occasion. For example, CSI subreport transmissions on Type-2 occasions can occur more frequently than on Type-1 occasions. That is, one Type-1 occasion and multiple Type-2 occasions can form a single cycle.

[0344] As illustrated in the embodiment described with reference to Figure 21, CSIs can be transmitted using opportunities configured with different amounts of resources. The present disclosure then describes embodiments for configuring opportunities and utilizing configured opportunities.

[0345] For example, a PUCCH / PUSCH resource allocated for P / SP-CSI reporting may have 5 PRBs, but it can be configured / instructed to allocate 10 PRBs for one occasion every N periods or N occasions. Another example is a PUCCH / PUSCH resource allocated for P / SP-CSI reporting with 6 OFDM symbols, but it can be configured / instructed to allocate 11 OFDM symbols for one occasion every N periods or N occasions. Yet another example is for multiple PUSCH resources allocated for A-CSI reporting, where 11 OFDM symbols can be allocated for a specific PUSCH and 6 OFDM symbols can be allocated for the remaining PUSCH(s).

[0346] Alternatively, resource amounts can be changed opportunistically during certain intervals via DCI, group-common DCI, or MAC-CE. That is, the amount of resources available for temporarily sending CSI can be changed during certain intervals. For example, if the PUCCH / PUSCH resources allocated for P / SP-CSI reporting are 5PRB, the terminal may be instructed via DCI, group-common DCI, or MAC-CE to increase the resource amount to 10PRB. In this case, the increased resource amount can be maintained until further instruction, or it can be reduced back to 5PRB after a certain period of time.

[0347] As in the example above, PUSCH / PUCCH systems with relatively large resources allocated (hereinafter referred to as "Type 1 PUXCH," "Type-1 Uplink Resource," or "Type-1 Opportunity") and PUSCH / PUCCH systems with relatively small resources allocated (hereinafter referred to as "Type 2 PUXCH," "Type-2 Uplink Resource," or "Type-2 Opportunity") can be operated. In this case, the method of setting up CSI reports differs between Type 1 PUXCH and Type 2 PUXCH. In the following explanation, it is stated that three CSIs (e.g., CSI#1 / 2 / 3) correspond to a single CSI report, but the embodiments described later can also be applied when different numbers of CSIs correspond to a single CSI report.

[0348] In a Type 1 PUXCH, all information for CSI#1 / 2 / 3 can be included. Alternatively, all information for CSI#1 / 2 / 3 can be included, but compressed information can be included for each CSI or some CSI indices. For example, compression can be performed by configuring the CSI with only WB PMI and / or CQI without SB PMI and / or CQI, separating granularity for time domain / frequency domain / spatial domain basis, omitting some information, or configuring with baseline values ​​and difference values. Alternatively, in the case of beam management-related reports such as L1-RSRP or L1-SINR, compression can be performed by reducing the number of CRI / RSRP / SINR values ​​for each CSI index.

[0349] In a Type 2 PUXCH, only information for specific CSI indices can be included. These specific CSI indices can be predefined (e.g., the smallest CSI index, the largest CSI index, the smallest CSI sub-configuration index, the largest CSI sub-configuration index, etc.) or configured through higher-level signaling. Alternatively, specific CSI indices can be configured differently on an occasion-by-occasion basis.

[0350] On the other hand, a Type 1 PUXCH can be embodied in a PUCCH for multi-CSI applications. Specifically, if a PUCCH for multi-CSI (e.g., a PUCCH configured to send multiple CSI reports) exists within a PUCCH slot configured for P / SP-CSI reporting, the terminal can use the PUCCH for multi-CSI as a container to send CSIs. In this case, the PUCCH for multi-CSI can mean a Type 1 PUXCH. Here, a PUCCH configured to send multiple CSI reports can be used to send sub-configuration CSIs, whether it was configured for sending sub-configuration CSIs or for sending a single CSI report.

[0351] Alternatively, the Type 1 PUXCH can be embodied in a CG (configured grant) or DG (dynamic grant) PUXCH. Specifically, if PUXCHs for the same or different carriers are assigned within a PUXCH slot configured for P / SP-CSI reporting, CSI reporting can be multiplexed through the relevant PUXCH. In this case, the relevant PUXCH can mean a Type 1 PUXCH.

[0352] In this embodiment, to reduce mismatches in CSIs between the base station and the terminal, information indicating which CSI index information should be included at each occasion can be included in the CSI report. For example, for a Type 2 PUXCH, if CSI #2 is included at a particular occasion, the terminal can generate a CSI report that includes information related to index #2 and transmit it to the base station. For example, information related to the CSI index may be included in CSI Part-1.

[0353] [Example #3] When WB reporting is set up for PMI and / or CQI, the CSI is not divided into Part 1 and Part 2, but is instead composed of a single CSI report.

[0354] Table 13 below shows the definitions for the mapping in the CSI field of the CSI report, as extracted from the TS 38.212 document.

[0355] [Table 13]

[0356] As shown in Table 13, a single CSI report can include CRI, RI, LI, zero padding bits, WB PMI, WB CQI, etc. Here, the number of bits for LI, PMI, and / or CQI can vary depending on the combination of CRI / RI values ​​actually reported. If the number of bits in a single CSI report is variable, a problem may arise where the base station cannot accurately decode the information in the CSI report. To solve this problem, by defining zero padding bits, the overall payload size of a single CSI report can be kept constant even if the CRI / RI values ​​vary.

[0357] In this disclosure, we propose a technique for constructing a single CSI report when, in L sub-configurations for a given CSI report #n, one of options #1 / 2 / 3 is used to feed back a CSI report to the base station that includes CSIs (etc.) corresponding to N sub-configurations (etc.) between 1 and L.

[0358] In one embodiment, a method can be considered for generating CSI reports that include information corresponding to all sub-settings for each CSI content. Specifically, the CSI can be configured as shown in Table 14 below.

[0359] [Table 14]

[0360] At this time, the zero-padding bit Op is set to the maximum payload N, considering all rank combinations per allowed sub-configuration as reported. max And payload N considering the actual reported rank combinations for each sub-setting. repoted It can be defined as the difference between them. For example, the maximum payload N max and payload N repoted It can be defined as shown in Table 15 below.

[0361] [Table 15]

[0362] In one embodiment, a method can be considered in which the overall CSI is constructed by first configuring CSI content corresponding to one sub-setting, and then concatenating the information corresponding to all sub-settings. Specifically, the CSI can be configured as shown in Table 16 below. Table 16 shows an example where it is composed of two sub-settings.

[0363] [Table 16]

[0364] Figure 22 illustrates an example of a procedure for transmitting a CSI report based on a sub-configuration according to one embodiment of the present disclosure. Figure 22 illustrates signal exchange between terminal 2210 and base station 2220.

[0365] Referring to Figure 22, in step S2201, base station 2220 transmits configuration information for the CSI reporting setting to terminal 2210. Here, the CSI reporting setting is associated with at least one AP number and / or at least one power offset value.

[0366] In step S2203, base station 2220 transmits configuration information for N opportunities per CSI report setting to terminal 2210. In other words, base station 2220 sets up multiple opportunities for a single CSI report. Here, each opportunity is used to transmit one CSI sub-report. A CSI sub-report can correspond to one sub-setting or a combination of multiple sub-settings.

[0367] In step S2205, terminal 2210 calculates the CSI value. Here, the CSI value corresponds to at least one AP number and / or at least one power offset value. In other words, the CSI corresponding to the sub-configuration () determined by the configured AP number () and / or configured power offset value () is calculated.

[0368] In step S2207, terminal 2210 reports a CSI. The CSIs correspond to different AP numbers and / or power offset values ​​and are transmitted on each occasion. In one embodiment, one CSI can be transmitted on one occasion. In another embodiment, a CSI sub-report formed by a combination of CSIs can be transmitted on one occasion.

[0369] The proposed methods described above can be implemented independently, but they can also be implemented as a combination (or merger) of some of the proposed methods. Rules can be defined so that the base station informs the terminal of the applicability of the proposed method (or information regarding the rules of the proposed method) via a predefined signal (e.g., a physical layer signal or a higher layer signal).

[0370] This disclosure can be embodied in other specific forms, provided that the technical ideas and essential features described herein do not deviate from those described herein. Therefore, the above detailed description should not be constrained in any way and should be considered illustrative. The scope of this disclosure shall be determined by a reasonable interpretation of the attached claims, and all modifications within the equivalent scope of this disclosure shall be included within the scope of this disclosure. Furthermore, examples may be formed by combining claims that are not explicitly referenced in the claims, or by including them as new claims through amendments made after filing.

[0371] [Industrial applicability] The embodiments of this disclosure can be applied to a variety of wireless connectivity systems. Examples of such systems include 3GPP (3rd Generation Partnership Project) or 3GPP2 systems.

[0372] The embodiments of this disclosure can be applied not only to the various wireless connection systems described above, but also to all technical fields that utilize such various wireless connection systems. Furthermore, the proposed method can also be applied to mmWave and THz communication systems using ultra-high frequency bands.

[0373] Additionally, the embodiments of this disclosure can be applied to a variety of applications, including autonomous vehicles and drones.

[0374] [Claims when filing an international application] [Claim 1] A method performed by a terminal (user equipment: UE) in a wireless communication system, Steps include receiving configuration information for a CSI (channel state information) report that includes a catalog of multiple sub-configurations; and, The steps include: transmitting at least one CSI to a base station, which includes at least one measurement result based on CSI-RS related to the CSI report; The aforementioned sub-settings are distinguished by at least one of the associated power offset or the number of antenna ports. The first CSI sub-report, determined based on at least one CSI, is transmitted on the first occasion of the occasions determined based on the configuration information. A second CSI sub-report, determined based on at least one of the aforementioned CSIs, is transmitted on the second of the aforementioned occasions. [Claim 2] The method according to claim 1, wherein the opportunity is included in a slot belonging to a plurality of periods for P(periodic) / SP(semi-persistent)CSI reporting indicated by the setting information. [Claim 3] The method according to claim 1, wherein the opportunity is included in a slot belonging to at least one period for P / SP CSI reporting as indicated by the configuration information. [Claim 4] The method according to claim 1, wherein the opportunity is included in a plurality of uplink slots indicated by an uplink grant for AP (aperiodic) CSI reporting indicated by the configuration information. [Claim 5] The first CSI sub-report includes a first CSI corresponding to the first sub-setting among the sub-settings, The method according to claim 1, wherein the second CSI sub-report includes a second CSI corresponding to the second sub-setting among the sub-settings. [Claim 6] The first CSI sub-report mentioned above includes common information of the CSI corresponding to the sub-setting, The method according to claim 1, wherein the second CSI sub-report includes the remainder of the CSI corresponding to one of the sub-settings, excluding the common information. [Claim 7] The first CSI sub-report includes a baseline value for at least one item of the CSI corresponding to the sub-setting, The method according to claim 1, wherein the second CSI sub-report includes a differential value of at least one item of the CSI corresponding to one of the sub-settings with respect to the baseline value. [Claim 8] The first CSI sub-report includes all items of the first CSI and at least one item of the remaining CSI corresponding to the sub-setting. The method according to claim 1, wherein the second CSI sub-report includes all items of the second CSI and at least one item of the remaining at least one CSI among the CSIs corresponding to the sub-setting. [Claim 9] The first CSI sub-report includes compressed information of the CSI corresponding to the sub-setting, The method according to claim 1, wherein the second CSI sub-report includes a first CSI among the CSIs corresponding to the sub-setting. [Claim 10] The method according to claim 1, wherein the setting information includes a periodic parameter and an offset parameter that indicate a slot containing resources for each of the sub-settings. [Claim 11] The first uplink resources for the first CSI subreport are set to be relatively larger than the second uplink resources for the second CSI subreport. The first CSI sub-report includes the CSI or compressed information of the CSI corresponding to the sub-setting, The method according to claim 1, wherein the second CSI sub-report includes a first CSI among the CSIs corresponding to the sub-setting. [Claim 12] A terminal (user equipment: UE) in a wireless communication system, Transceiver; and, A processor connected to the aforementioned transceiver; The aforementioned processor, Receive configuration information for a CSI (channel state information) report that includes a catalog of multiple sub-configurations; It is configured to transmit at least one CSI to a base station, which includes at least one measurement result based on CSI-RS related to the CSI report; The aforementioned sub-settings are distinguished by at least one of the associated power offset or the number of antenna ports. The first CSI sub-report, determined based on at least one CSI, is transmitted on the first occasion of the occasions determined based on the configuration information. A second CSI sub-report, determined based on at least one of the aforementioned CSIs, is transmitted on the second of the aforementioned occasions. [Claim 13] A communication device, At least one processor; The system comprises at least one computer memory connected to the at least one processor, which stores instruction words that instruct operations when executed by the at least one processor; The aforementioned operation is, Receive configuration information for a CSI (channel state information) report that includes a catalog of multiple sub-configurations; It is configured to transmit at least one CSI to a base station, which includes at least one measurement result based on CSI-RS related to the CSI report; The aforementioned sub-settings are distinguished by at least one of the associated power offset or the number of antenna ports. The first CSI sub-report, determined based on at least one CSI, is transmitted on the first occasion of the occasions determined based on the configuration information. A second CSI sub-report, determined based on the aforementioned at least one CSI, is transmitted on the second of the aforementioned occasions by a communications device. [Claim 14] A non-transitory computer-readable medium that stores at least one instruction, The aforementioned at least one instruction word is executable by the processor and causes the device to execute. The aforementioned processor, Receive configuration information for a CSI (channel state information) report that includes a catalog of multiple sub-configurations; It is configured to transmit at least one CSI to a base station, which includes at least one measurement result based on CSI-RS related to the CSI report; The aforementioned sub-settings are distinguished by at least one of the associated power offset or the number of antenna ports. The first CSI sub-report, determined based on at least one CSI, is transmitted on the first occasion of the occasions determined based on the configuration information. A second CSI sub-report, determined based on at least one of the aforementioned CSIs, is transmitted on a computer-readable medium during the second of the aforementioned opportunities.

Claims

1. A method performed by a terminal (user equipment: UE) in a wireless communication system, Steps include receiving configuration information for a CSI (channel state information) report that includes a catalog of multiple sub-configurations; and, The steps include: transmitting at least one CSI to a base station, which includes measurement results based on at least one CSI-RS related to the CSI report; The aforementioned sub-settings are distinguished by at least one of the associated power offset or the number of antenna ports. A first CSI sub-report, determined based on at least one CSI, is transmitted on the first occasion of the occasions determined based on the configuration information. A second CSI sub-report, determined based on the aforementioned at least one CSI, is transmitted on the second of the aforementioned occasions.

2. The method according to claim 1, wherein the opportunity is included in a slot belonging to a plurality of periods for P (periodic) / SP (semi-persistent) CSI reporting indicated by the setting information.

3. The method according to claim 1, wherein the opportunity is included in a slot belonging to at least one period for P / SP CSI reporting as indicated by the setting information.

4. The method according to claim 1, wherein the opportunity is included in a plurality of uplink slots indicated by an uplink grant for AP (aperiodic) CSI reporting indicated by the configuration information.

5. The first CSI sub-report includes a first CSI corresponding to the first sub-setting among the sub-settings, The method according to claim 1, wherein the second CSI sub-report includes a second CSI corresponding to a second sub-setting among the sub-settings.

6. The first CSI sub-report includes common information of the CSI corresponding to the sub-setting, The method according to claim 1, wherein the second CSI sub-report includes the CSI corresponding to one of the sub-settings, with the common information removed.

7. The first CSI sub-report includes a baseline value for at least one item of the CSI corresponding to the sub-setting, The method according to claim 1, wherein the second CSI sub-report includes a differential value of at least one item of the CSI corresponding to one of the sub-settings with respect to the baseline value.

8. The first CSI sub-report includes all items of the first CSI and at least one item of the remaining CSI corresponding to the sub-setting, The method according to claim 1, wherein the second CSI sub-report includes all items of the second CSI and at least one item of the remaining at least one CSI among the CSIs corresponding to the sub-setting.

9. The first CSI sub-report includes compressed information of the CSI corresponding to the sub-setting, The method according to claim 1, wherein the second CSI sub-report includes a first CSI among the CSIs corresponding to the sub-setting.

10. The method according to claim 1, wherein the setting information includes a periodic parameter and an offset parameter that indicate a slot containing resources for each of the sub-settings.

11. The first uplink resources for the first CSI subreport are set to be relatively larger than the second uplink resources for the second CSI subreport. The first CSI sub-report includes the CSI or compressed information of the CSI corresponding to the sub-setting, The method according to claim 1, wherein the second CSI sub-report includes a first CSI among the CSIs corresponding to the sub-setting.

12. A terminal (user equipment: UE) in a wireless communication system, Transceiver; and, A processor connected to the aforementioned transceiver; The aforementioned processor, Receive configuration information for a CSI (channel state information) report that includes a catalog of multiple sub-configurations; It is configured to transmit at least one CSI to a base station, which includes measurement results based on at least one CSI-RS related to the CSI report; The aforementioned sub-settings are distinguished by at least one of the associated power offset or the number of antenna ports. A first CSI sub-report, determined based on at least one CSI, is transmitted on the first occasion of the occasions determined based on the configuration information. A second CSI sub-report, determined based on the aforementioned at least one CSI, is transmitted on the second of the aforementioned occasions.

13. A communication device, At least one processor; The system comprises at least one computer memory connected to the at least one processor, which stores instruction words that instruct operations when executed by the at least one processor; The aforementioned operation is, Receive configuration information for a CSI (channel state information) report that includes a catalog of multiple sub-configurations; It is configured to transmit at least one CSI to a base station, which includes measurement results based on at least one CSI-RS related to the CSI report; The aforementioned sub-settings are distinguished by at least one of the associated power offset or the number of antenna ports. A first CSI sub-report, determined based on at least one CSI, is transmitted on the first occasion of the occasions determined based on the configuration information. A second CSI sub-report, determined based on the aforementioned at least one CSI, is transmitted on the second of the aforementioned occasions by a communication device.

14. A non-transitory computer-readable medium for storing at least one instruction, The aforementioned at least one instruction word is executable by the processor and causes the device to execute, The aforementioned processor, Receive configuration information for a CSI (channel state information) report that includes a catalog of multiple sub-configurations; It is configured to transmit at least one CSI to a base station, which includes measurement results based on at least one CSI-RS related to the CSI report; The aforementioned sub-settings are distinguished by at least one of the associated power offset or the number of antenna ports. A first CSI sub-report, determined based on at least one CSI, is transmitted on the first occasion of the occasions determined based on the configuration information. A second CSI sub-report, determined based on the aforementioned at least one CSI, is transmitted on a computer-readable medium during the second of the aforementioned opportunities.

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