Apparatus and method for performing communications in an energy saving related mode in a wireless communication system

Abstract

The present disclosure relates to a wireless communication system for performing communication in an energy saving related mode, the method being performed by a terminal, and includes the steps of receiving configuration information for configuring a transmission configuration indication (TCI) related parameter, receiving control information including the TCI related parameter, identifying a reference signal (RS) indicated by the TCI related parameter, and transmitting or receiving a signal related to the control information based on the reference RS, wherein the configuration information indicates a first reference RS or a first radio resource to be applied in a first time interval and a second reference RS or a second radio resource to be applied in a second time interval for one value of the TCI related parameter.

Description

[Technical Field]

[0001] The following description is directed to a wireless communication system and relates to an apparatus and method for performing communications in a mode associated with energy saving in the wireless communication system. [Background technology]

[0002] Wireless access systems have been widely deployed to provide various communication services such as voice, data, etc. Generally, wireless access systems are multiple access systems that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, and single carrier frequency division multiple access (SC-FDMA) systems.

[0003] In particular, as many communication devices require large communication capacities, enhanced mobile broadband (eMBB) communication technology, which is more advanced than existing radio access technology (RAT), has been proposed. In addition, not only massive machine-type communications (mMTC) that connects multiple devices and objects to provide various services anytime and anywhere, but also communication systems that take reliability and latency-sensitive services / user equipment (UE) into consideration have been proposed. Various technical configurations have been proposed for this purpose. Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure is directed to an apparatus and method for performing communications in a mode associated with energy saving in a wireless communication system.

[0005] The present disclosure is directed to an apparatus and method for switching modes defined by turning on / off spatial elements in a wireless communication system.

[0006] The present disclosure is directed to an apparatus and method for switching modes according to predefined rules in a wireless communication system.

[0007] The present disclosure is directed to an apparatus and method for switching modes by changing configuration factors associated with the modes in a wireless communication system.

[0008] The present disclosure is directed to an apparatus and method for mode switching through changes in channel state information (CSI) reporting sub-configuration in a wireless communication system.

[0009] SUMMARY The present disclosure is directed to an apparatus and method for switching modes with time interval changes in a wireless communication system.

[0010] The present disclosure is directed to an apparatus and method for switching modes according to a bandwidth part (BWP) in a wireless communication system.

[0011] The present disclosure is directed to an apparatus and method for using a fixed application time after transmitting an indicator for mode switching in a wireless communication system.

[0012] The present disclosure is directed to an apparatus and method for analyzing transmission configuration indication (TCI) related parameters based on mode in a wireless communication system.

[0013] The present disclosure is directed to an apparatus and method for selectively applying a list of TCI-related parameters based on mode in a wireless communication system.

[0014] The present disclosure is directed to an apparatus and method for selecting radio resources for a channel based on mode in a wireless communication system.

[0015] The present disclosure is directed to an apparatus and method for handling mode-dependent invalid settings in a wireless communication system.

[0016] The technical objectives to be achieved in the present disclosure are not limited to those mentioned above, and other technical problems not mentioned can be considered by a person skilled in the art to which the technical configuration of the present disclosure is applied from the examples of the present disclosure described below. [Means for solving the problem]

[0017] As an example of the present disclosure, a method executed by a terminal in a wireless communication system includes (comprising; configuring; establishing; setting; encompassing; containing; having) the steps of receiving configuration information for configuring a transmission configuration indication (TCI)-related parameter, receiving control information including the TCI-related parameter, identifying a reference signal (RS) indicated by the TCI-related parameter, and transmitting or receiving a signal related to the control information based on the reference RS, wherein the configuration information indicates a first reference RS or a first radio resource to be applied in a first time interval and a second reference RS or a second radio resource to be applied in a second time interval, for one value of the TCI-related parameter.

[0018] 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 receives configuration information for setting a transmission configuration indication (TCI)-related parameter, receives control information including the TCI-related parameter, identifies a reference signal (RS) indicated by the TCI-related parameter, and controls to transmit or receive a signal related to the control information based on the reference RS, and the configuration information indicates, for one value of the TCI-related parameter, a first reference RS or a first radio resource to be applied to a first time interval, and indicates a second reference RS or a second radio resource to be applied to a second time interval.

[0019] As an example of the present disclosure, a communication device includes at least one processor and at least one computer memory coupled to the at least one processor and storing instructions that, when executed by the at least one processor, instruct operations, the operations include receiving configuration information for setting transmission configuration indication (TCI)-related parameters, receiving control information including the TCI-related parameters, identifying a reference signal (RS) indicated by the TCI-related parameters, and transmitting or receiving a signal related to the control information based on the reference RS. The configuration information indicates a first reference RS or a first radio resource to be applied in a first time interval and a second reference RS or a second radio resource to be applied in a second time interval, for one value of the TCI-related parameters.

[0020] As an example of the present disclosure, a non-transitory computer-readable medium storing at least one instruction includes the at least one instruction executable by a processor, the at least one instruction causing an apparatus to: receive configuration information for setting a transmission configuration indication (TCI)-related parameter; receive control information including the TCI-related parameter; identify a reference signal (RS) indicated by the TCI-related parameter; and control the apparatus to transmit or receive a signal related to the control information based on the reference RS; the configuration information indicates a first reference RS or a first radio resource to be applied in a first time interval and a second reference RS or a second radio resource to be applied in a second time interval, for one value of the TCI-related parameter.

[0021] The detailed aspects of the present disclosure are merely some of the preferred embodiments of the present disclosure, and various embodiments reflecting the technical features of the present disclosure can be derived and understood by those having ordinary skill in the art based on the detailed description of the present disclosure set forth below. [Effects of the Invention]

[0022] The embodiments based on the present disclosure provide the following effects.

[0023] According to the present disclosure, the energy consumption of a base station can be reduced.

[0024] The effects that can be obtained from the embodiments of the present disclosure are not limited to the effects mentioned above, and other effects not mentioned can be clearly derived and understood by those skilled in the art to which the technical configuration of the present disclosure is applied from the following description of the embodiments of the present disclosure. In other words, unintended effects resulting from implementing the configurations described in the present disclosure can also be derived from the embodiments of the present disclosure by those skilled in the art. [Brief explanation of the drawings]

[0025] [Figure 1] FIG. 1 is a diagram illustrating the structure of a wireless communication system to which the present disclosure can be applied. [Figure 2] FIG. 1 illustrates an example of a wireless device to which the present disclosure can be applied. [Figure 3] FIG. 1 is a diagram illustrating a frame structure in a wireless communication system to which the present disclosure can be applied. [Figure 4] 1 illustrates an example of a resource grid in a wireless communication system to which the present disclosure can be applied. [Figure 5] 1 illustrates an example of a physical resource block in a wireless communication system to which the present disclosure can be applied. [Figure 6] 1 illustrates an example of a slot structure in a wireless communication system to which the present disclosure can be applied. [Figure 7]1 illustrates examples of physical channels used in a wireless communication system to which the present disclosure can be applied, and a general signal transmission / reception method using these channels. [Figure 8] 1 illustrates an example of mapping physical channels within a slot in a wireless communication system to which the present disclosure can be applied. [Figure 9] 1 shows an example of a beam that can be applied to the present disclosure. [Figure 10] 1 illustrates an example of a DL downlink beam management (BM) procedure using synchronization signal block (SSB) that can be applied to the present disclosure. [Figure 11] 1 illustrates an example of a DL BM procedure using CSI (channel state information)-RS (reference signal) that can be applied to the present disclosure. [Figure 12] 10 shows an example of a terminal receiving beam determination procedure that can be applied to the present disclosure. [Figure 13] 1 illustrates an example of a base station transmit beam determination procedure that can be applied to the present disclosure. [Figure 14] 1 illustrates an example of resource allocation in the time and frequency domain that can be applied to the present disclosure. [Figure 15] 1 illustrates an example of beam sweeping for UL uplink beam management (BM) using a sounding reference signal (SRS), which can be applied to the present disclosure. [Figure 16] 1 illustrates an example of a UL BM procedure with SRS that can be applied to the present disclosure. [Figure 17] 1 illustrates an example of an operation procedure of a base station that supports network energy saving (NES) technology that can be applied to the present disclosure. [Figure 18] 1 illustrates an example procedure for CSI measurement and reporting that can be applied to the present disclosure. [Figure 19a]An example of SB-FD (subband-wise full duplex) is shown below. [Figure 19b] An example of SS-FD (spectrum-sharing full duplex) is shown below. [Figure 20a] An example of allocating time resources based on HD (half-duplex) and SB-FD is shown. [Figure 20b] An example of allocating time resources based on HD and SS-FD is shown. [Figure 21] 10 illustrates an example procedure for switching spatial element modes according to one embodiment of the present disclosure. [Figure 22] 10 illustrates an example procedure for switching spatial element modes based on time intervals according to one embodiment of the present disclosure. [Figure 23] 10 illustrates an example procedure for switching spatial element modes based on time intervals according to one embodiment of the present disclosure. [Figure 24] 10 illustrates an example of a procedure for performing communication based on analysis of TCI-related parameters in a spatial element mode according to an embodiment of the present disclosure. [Figure 25] 10 illustrates an example of a procedure in which a terminal performs communication based on a set of TCI-related parameters in a spatial element mode according to an embodiment of the present disclosure. [Figure 26] 10 illustrates an example of a procedure in which a terminal selects radio resources based on spatial element modes according to an embodiment of the present disclosure. [Figure 27] 10 illustrates an example of a procedure for changing modes based on a mode switching instruction according to one embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0026] The following examples combine the components and features of the present disclosure in a predetermined form. Each component or feature can be considered optional unless otherwise explicitly stated. Each component or feature can be implemented in a form not combined with other components or features. Also, some components and / or features can be combined to form an embodiment of the present disclosure. The order of operations described in the embodiments of the present disclosure can 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.

[0027] In describing the drawings, procedures or steps that may obscure the gist of the present disclosure are not described, and procedures or steps that can be understood by a person skilled in the art are not described.

[0028] Throughout the specification, when a part "comprising" or "including" a certain element(s), this means that the part or part may further include other elements, without excluding other elements, unless otherwise specified to the contrary. Furthermore, terms such as "unit," "unit," and "module" used in the specification refer to a unit that processes at least one function or operation, which can be realized by hardware, software, or a combination of hardware and software. Furthermore, in the context of describing this disclosure (particularly in the context of the claims below), the words "a" or "an," "one," "the," and similar related words can be used to include both the singular and the plural, unless otherwise indicated in the specification or clearly contradicted by the context.

[0029] In this specification, the embodiments of the present disclosure have been described with a focus on the data transmission / reception relationship between a base station and a mobile station. Here, the base station is meant as a terminal node of a network that directly communicates with a mobile station. Certain operations described herein as being performed by a base station may also be performed by an upper node of the base station in some cases.

[0030] That is, in a network consisting of multiple network nodes including a base station, various operations performed for communication with a mobile station may be performed by the base station or other network nodes other than the base station. In this case, the term "base station" may 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.

[0031] Furthermore, in the embodiments of the present 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).

[0032] Also, the transmitting end refers to a fixed and / or mobile node that provides a data service or a voice service, and the receiving end refers to a fixed and / or mobile node that receives a data service or a voice service. 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.

[0033] Embodiments of the present disclosure may be supported by standard documents disclosed in at least one of wireless access systems, such as an IEEE 802.xx system, a 3GPP (3rd Generation Partnership Project: registered trademark; the same applies hereinafter) system, a 3GPP LTE (Long Term Evolution) system, a 3GPP 5G (5th generation) NR (New Radio) system, and a 3GPP2 system. In particular, embodiments of the present disclosure may 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.

[0034] Furthermore, the embodiments of the present disclosure may be applied to other wireless access systems and are not limited to the above-mentioned systems, for example, to systems that are later adopted after the 3GPP 5G NR system, and are not limited to a specific system.

[0035] That is, any obvious steps or parts not described in the embodiments of the present disclosure can be explained by referring to the above documents, and all terms disclosed in this specification can be explained by the above standard documents.

[0036] Preferred embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The detailed description disclosed below, together with the accompanying drawings, is intended to explain exemplary embodiments of the present disclosure, and is not intended to show the only embodiments in which the technical configuration of the present disclosure can be implemented.

[0037] Furthermore, specific terms used in the embodiments of the present disclosure are provided to aid in understanding the present disclosure, and the use of such specific terms may be changed to other forms without departing from the technical spirit of the present disclosure.

[0038] The following techniques can be applied to various wireless access systems, such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), and single carrier frequency division multiple access (SC-FDMA).

[0039] For clarity of the following description, the description will be based on a 3GPP communication system (e.g., LTE, NR, etc.), but the technical idea of ​​the present disclosure is not limited thereto. LTE may refer to technology from 3GPP TS 36.xxx Release 8 or later. Specifically, LTE technology from 3GPP TS 36.xxx Release 10 or later may be referred to as LTE-A, and LTE technology from 3GPP TS 36.xxx Release 13 or later may be referred to as LTE-A pro. 3GPP NR may refer to technology from TS 38.xxx Release 15 or later. 3GPP 6G may refer to technology from TS Release 17 and / or Release 18 or later. "xxx" refers to the specific number of the standard document. LTE / NR / 6G may be referred to as 3GPP systems.

[0040] 3GPP 6G may refer to technology after 3GPP NR based on the 3GPP system. 3GPP 6G is not limited to a release or a specific TS document, and the name may be in a form different from 3GPP 6G. That is, 3GPP 6G may refer to technology introduced after 3GPP NR and is not limited to a specific form.

[0041] The following description will focus on the 3GPP NR system, but is not limited thereto and can also be applied to 3GPP 6G. Furthermore, the following description may be partially modified in consideration of the 3GPP 6G system and is not limited to a specific form. However, for the sake of convenience, the following description will focus on the 3GPP NR system. For background techniques, terms, abbreviations, etc. used in this disclosure, reference may be made to the matters described in standard documents published prior to this disclosure. For example, reference may be made to the 36.xxx and 38.xxx standard documents.

[0042] System in general

[0043] As more communication devices require greater communication capacity, there is a growing need for improved mobile broadband communication compared to existing radio access technologies (RATs). Massive Machine Type Communications (MTC), which connects multiple devices and objects to provide a variety of services anytime, anywhere, is also one of the major issues being considered for next-generation communications. Furthermore, communication system designs that take into account reliability- and latency-sensitive services / terminals are being discussed. Thus, the introduction of next-generation RATs that take into account enhanced mobile broadband communication (eMBB), massive MTC (mMTC), and Ultra-Reliable and Low Latency Communication (URLLC), etc., is being discussed. For convenience, these technologies are referred to as NR in this disclosure. NR is an example of a 5G RAT.

[0044] New RAT systems, including NR, use an OFDM transmission scheme or a similar transmission scheme. A new RAT system may follow OFDM parameters different from those of LTE. Alternatively, a new RAT system may follow the existing LTE / LTE-A numerology but support a larger system bandwidth (e.g., 100 MHz). Alternatively, one cell may support multiple numerologies. That is, terminals operating with different numerologies can coexist within one cell.

[0045] A numerology corresponds to one subcarrier spacing in the frequency domain. Different numerologies can be defined by scaling the reference subcarrier spacing by an integer N.

[0046] Additionally, new RAT systems, including 6G, can be considered as next-generation RATs. New RAT systems, including 6G, can consider, 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-reliable connections, and vii) connected intelligence with machine learning capabilities. Taking into account the above-mentioned aspects, new RAT systems, including 6G, can consider using the terahertz (THz) frequency band at a higher frequency than NR systems for wider bandwidth and higher transmission speeds. New RAT systems, including 6G, can overcome existing limitations by applying AI / ML (artificial intelligence / machine learning), but are not limited to this.

[0047] FIG. 1 is a diagram illustrating the structure of a wireless communication system to which the present disclosure can be applied. Referring to FIG. 1, the NG-RAN is composed of a gNB that provides an NG-Radio Access (NG-RA) user plane (i.e., a new access stratum (AS) sub-layer / Packet Data Convergence Protocol (PDCP) / Radio Link Control (RLC) / MAC / PHY) and a control plane (RRC) protocol termination for a UE. The gNBs are interconnected via an Xn interface. The gNBs are also connected to a New Generation Core (NGC) via an NG interface. More specifically, the gNBs are connected to an Access and Mobility Management Function (AMF) via an N2 interface and to a User Plane Function (UPF) via an N3 interface. FIG. 1 is a structure based on an NR system. In a 6G system, the structure of FIG. 1 may be used identically or with some modifications, and is not limited to a specific form.

[0048] FIG. 2 is a diagram illustrating an example of a wireless device to which the present disclosure can be applied.

[0049] 2, a wireless device 200 may transmit and receive wireless signals via various wireless access technologies (e.g., LTE, LTE-A, LTE-A pro, NR, 5G, 5G-A, 6G). The wireless device 200 may include 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.

[0050] The processor 202 may 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 may process information in the memory 204 to generate first information / signals, and then transmit a wireless signal containing the first information / signals via the transceiver 206. The processor 202 may also receive a wireless 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 may be connected to the processor 202 and may store various information related to the operation of the processor 202. For example, the memory 204 may store software code including instructions for performing some or all of the processes controlled by the processor 202 or for implementing 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 communications modem / circuit / chip designed to implement wireless communication technology. The transceiver 206 may be connected to the processor 202 and may transmit and / or receive wireless signals via at least one antenna 208. The transceiver 206 may include a transmitter and / or a receiver. The transceiver 206 may be mixed with an RF (radio frequency) unit. In this disclosure, a wireless device may also refer to a communication modem / circuit / chip.

[0051] The hardware elements of the wireless device 200 are described in more detail below. Without limitation, at least one protocol layer may be implemented by the at least one processor 202. For example, the at least one processor 202 may implement at least one layer (e.g., functional layers such as physical (PHY), media access control (MAC), radio link control (RLC), packet data convergence protocol (PDCP), radio resource control (RRC), and service data adaptation protocol (SDAP)). The at least one processor 202 may generate at least one protocol data unit (PDU) and / or at least one service data unit (SDU) in accordance with the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein. The at least one processor 202 may generate messages, control information, data, or information in accordance with the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein. The at least one processor 202 can generate and provide signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information to the at least one transceiver 206 according to the functions, procedures, suggestions, and / or methods disclosed herein. The at least one processor 202 can receive signals (e.g., baseband signals) from the at least one transceiver 206 and obtain the PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein.

[0052] The at least one processor 202 may also be referred to as a controller, microcontroller, microprocessor, or microcomputer. The at least one processor 202 may be implemented using hardware, firmware, software, or a combination thereof. For example, the at least one processor 202 may include at least one application specific integrated circuit (ASIC), at least one digital signal processor (DSP), at least one digital signal processing device (DSPD), at least one programmable logic device (PLD), or at least one field programmable gate array (FPGA). The descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein may 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 the at least one processor 202 or may be stored in at least one memory 204 and executed by the at least one processor 202. The descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein may be implemented using firmware or software in the form of code, instructions and / or collections of instructions.

[0053] At least one memory 204 may be coupled to the at least one processor 202 and may store various types of data, signals, messages, information, programs, code, instructions, and / or instructions. The at least one memory 204 may be comprised of read only memory (ROM), random access memory (RAM), erasable programmable read only memory (EPROM), flash memory, a hard drive, registers, cache memory, computer-readable storage media, and / or combinations thereof. The at least one memory 204 may be located internal and / or external to the at least one processor 202. Additionally, the at least one memory 204 may be coupled to the at least one processor 202 via various technologies, such as wired or wireless connections.

[0054] The at least one transceiver 206 can transmit user data, control information, wireless signals / channels, etc., as described in the methods and / or operational flowcharts herein, etc., to at least one other device. The at least one transceiver 206 can receive user data, control information, wireless signals / channels, etc., as described in the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein, etc., from at least one other device. For example, the at least one transceiver 206 can be coupled to at least one processor 202 and can transmit and receive wireless signals. For example, the at least one processor 202 can control the at least one transceiver 206 to transmit user data, control information, or wireless signals to at least one other device. The at least one processor 202 can also control the at least one transceiver 206 to receive user data, control information, or wireless signals from at least one other device. Furthermore, the at least one transceiver 206 may be connected to at least one antenna 208, and the at least one transceiver 206 may be configured to transmit and receive user data, control information, radio signals / channels, etc., as described in the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein, via the at least one antenna 208. In this specification, the at least one antenna may refer to multiple physical antennas or multiple logical antennas (e.g., antenna ports). The at least one transceiver 206 may convert the received user data, control information, radio signals / channels, etc., from RF band signals to baseband signals for processing using the at least one processor 202. The at least one transceiver 206 may convert the user data, control information, radio signals / channels, etc., processed using the at least one processor 202, from baseband signals to RF band signals. For this purpose, the at least one transceiver 206 may include an (analog) oscillator and / or a filter.

[0055] 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 referred to as a control unit, the transceiver 206 as a communication unit, and the memory 204 as a storage unit. In some cases, the communication unit may be used to include at least a part of the processor 202 and the transceiver 206.

[0056] The structure of the wireless device described with reference to Fig. 2 can be understood as the structure of at least a portion of various devices. For example, it may be at least a portion of various devices (e.g., a robot, a vehicle, an XR device, a mobile device, a home appliance device, an IoT device, an AI device / server, etc.). Furthermore, in various embodiments, the device may further include other components in addition to the components illustrated in Fig. 2.

[0057] For example, the device may be a portable device such as a smartphone, a smart pad, a wearable device (e.g., a smart watch, smart glasses), a portable computer (e.g., a laptop, etc.), etc. In this case, the device may further include at least one of 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 to another device (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 by a user.

[0058] For example, the device may be a mobile device such as a mobile robot, a vehicle, a train, an airborne / unmanned vehicle (AV), a ship, etc. In this case, the device may further include at least one of a driving unit including at least one of an engine, a motor, a powertrain, wheels, a brake, and a steering unit of the device, a power supply unit that supplies power and includes a wired / wireless charging circuit, a 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 maintenance, speed adjustment, and destination setting, and a position measurement unit that obtains position information of the mobile device through a global positioning system (GPS) and various sensors.

[0059] For example, the device may be an XR device such as an HMD, a head-up display (HUD) installed in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance, digital signage, a vehicle, a robot, etc. In this case, the device may further include at least one of a power supply unit that supplies power and includes a wired / wireless charging circuit and a battery, an input / output unit that acquires control information, data, etc. from the outside and outputs the generated XR object, and a sensor unit that detects status information, environmental information, and user information of the device or its surroundings.

[0060] For example, the device may be a robot that can be classified into industrial, medical, domestic, military, etc. depending on the purpose or field of use. In this case, the device may further include at least one of a sensor unit that detects status information, environmental information, and user information of the device or its surroundings, and a driving unit that performs various physical operations such as moving robot joints.

[0061] For example, the device may be an AI device such as a television, projector, smartphone, PC, laptop, digital broadcasting terminal, tablet PC, wearable device, set-top box (STB), radio, washing machine, refrigerator, digital signage, robot, or vehicle. In this case, the device may further include at least one of an input unit that acquires various types of data from the outside, an output unit that generates output related to vision, hearing, or touch, a sensor unit that detects status information, environmental information, or user information about the device or its surroundings, and a training unit that trains a model configured with an artificial neural network using learning data. The structure of the wireless device illustrated in FIG. 2 can be understood as part of a RAN node (e.g., a base station, DU, RU, RRH, etc.). That is, the device illustrated in FIG. 2 may be a RAN node. In this case, the device may further include a wired transceiver for fronthaul and / or backhaul communication. However, if the fronthaul and / or backhaul communication is based on wireless communication, at least one transceiver 206 illustrated in FIG. 2 may be used for the fronthaul and / or backhaul communication, and no wired transceiver may be included.

[0062] FIG. 3 is a diagram illustrating a frame structure in a wireless communication system to which the present disclosure can be applied.

[0063] An NR system can support multiple numerologies. Here, a numerology can be defined by subcarrier spacing and cyclic prefix (CP) overhead. In this case, multiple subcarrier spacings can be derived by scaling the base (reference) subcarrier spacing by an integer N (or μ). Furthermore, even if it is assumed that very low subcarrier spacings are not used at very high carrier frequencies, the numerology used can be selected independently of the frequency band. Furthermore, an NR system can support various frame structures with multiple numerologies.

[0064] The following describes OFDM numerologies and frame structures that can be considered in an NR system. A number of OFDM numerologies supported in an NR system can be defined as shown in Table 1 below.

[0065] [Table 1]

[0066] NR supports multiple numerologies (or subcarrier spacing (SCS)) to support various 5G services. For example, a 15 kHz SCS supports wide areas in traditional cellular bands, a 30 kHz / 60 kHz SCS supports dense urban areas, lower latency, and wider carrier bandwidths, and an SCS of 60 kHz or higher supports bandwidths wider than 24.25 GHz to overcome phase noise. NR frequency bands are defined by two types of frequency ranges (FR1 and FR2). FR1 and FR2 can be configured as shown in Table 2 below. FR2 can also refer to millimeter wave (mmW).

[0067] [Table 2]

[0068] JPEG2026506056000004.jpg190170

[0069] JPEG2026506056000005.jpg48170

[0070] [Table 3]

[0071] [Table 4]

[0072] FIG. 3 shows an example when μ=2 (SCS is 60 kHz). Referring to Table 3, one subframe can include four slots. The one subframe = {1, 2, 4} slots shown in FIG. 3 is an example, and the number of slots that can be included in one subframe is defined as shown in Table 3 or Table 4. In addition, a mini-slot may include 2, 4, or 7 symbols, or may include more or fewer symbols. Possible physical resources in an NR system include an antenna port, a resource grid, a resource element, a resource block, and a carrier part. The physical resources that can be considered in an NR system will now be described in detail.

[0073] First, with regard to antenna ports, an antenna port is defined such that the channel on which a symbol on the antenna port is carried can be inferred from the channel on which another symbol on the same antenna port is carried. If the large-scale properties of the channel on which a symbol on one antenna port is carried can be inferred from the channel on which a symbol on the other antenna port is carried, the two antenna ports are said to have a QC / QCL (quasi co-located or quasi co-location) relationship. Here, the large-scale properties include one or more of delay spread, Doppler spread, frequency shift, average received power, and received timing.

[0074] In the 6G system, communication can be performed at the above-mentioned terahertz frequency, which is higher than millimeter wave (mmW), and the frame structure can be the same as that shown in FIG. 3 or a separate frame structure for the 6G system, and is not limited to a specific form.

[0075] FIG. 4 illustrates a resource grid in a wireless communication system to which the present disclosure can be applied.

[0076] JPEG2026506056000008.jpg199170

[0077] Point A serves as a common reference point of the resource block grid and is obtained as follows:

[0078] -OffsetToPointA for the primary cell (PCell) downlink indicates the frequency offset between point A and the lowest subcarrier of the lowest resource block overlapping the SSB used by the terminal for initial cell selection. It is expressed in resource block units assuming a subcarrier spacing of 15 kHz for FR1 and a subcarrier spacing of 60 kHz for FR2.

[0079] -absoluteFrequencyPointA indicates the frequency location of point A expressed as ARFCN (absolute radio-frequency channel number).

[0080] JPEG2026506056000009.jpg47170

[0081]

number

[0082] JPEG2026506056000011.jpg53170

[0083]

number

[0084] Fig. 5 illustrates a physical resource block in a wireless communication system to which the present disclosure can be applied, and Fig. 6 illustrates a slot structure in a wireless communication system to which the present disclosure can be applied.

[0085] 5 and 6, a slot includes multiple symbols in the time domain. For example, in the case of normal CP, one slot includes seven symbols, while in the case of extended CP, one slot includes six symbols.

[0086] A carrier includes multiple subcarriers in the frequency domain. A resource block (RB) is defined by multiple (e.g., 12) consecutive subcarriers in the frequency domain. A bandwidth part (BWP) 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 can include up to N (e.g., 5) BWPs. Data communication is performed via activated BWPs, and only one BWP can be activated for one terminal. In the resource grid, each element is called a resource element (RE), and one complex symbol can be mapped to it.

[0087] The NR system can support up to 400 MHz per component carrier (CC). If a terminal operating on such a wideband CC keeps the radio frequency (RF) chip for the entire CC on at all times, the terminal's battery consumption may increase. Considering various use cases (e.g., eMBB, URLLC, MMTc, V2X, etc.) operating within a single wideband CC, different numerologies (e.g., subcarrier spacing, etc.) may be supported for each frequency band within the CC. Alternatively, different terminals may have different capabilities for maximum bandwidth. In consideration of this, a base station may instruct a terminal to operate only with a portion of the bandwidth of a wideband CC, rather than the entire bandwidth. For convenience, this portion of the bandwidth is defined as a bandwidth part (BWP). A BWP can consist of consecutive RBs on the frequency axis and correspond to one numerology (e.g., subcarrier spacing, CP length, slot / minislot duration).

[0088] Meanwhile, the base station can configure multiple BWPs even within one CC configured for a terminal. For example, a BWP occupying a relatively small frequency region can be configured in a PDCCH monitoring slot, and the PDSCH indicated in the PDCCH can be scheduled on a larger BWP. Alternatively, if UEs are concentrated in a specific BWP, some terminals can be configured in other BWPs for load balancing. Alternatively, taking into consideration frequency domain inter-cell interference cancellation between neighboring cells, a central portion of the spectrum in the entire bandwidth can be excluded and both-side BWPs can be configured within the same slot. That is, the base station can configure at least one DL / UL BWP for a terminal associated with a wideband CC. The base station can activate at least one DL / UL BWP among the DL / UL BWPs configured at a particular time (by L1 signaling, MAC control element (CE), RRC signaling, etc.). In addition, the base station can instruct switching to another configured DL / UL BWP (by L1 signaling, MAC CE, RRC signaling, etc.). Alternatively, switching to the configured DL / UL BWP can be performed on a timer basis when a timer value expires. In this case, the activated DL / UL BWP is defined as an active DL / UL BWP. However, in situations such as when the UE is performing an initial access procedure or before an RRC connection is set up, the UE may not be able to receive the configuration for the DL / UL BWP. Therefore, the DL / UL BWP assumed by the UE in such a situation is defined as the initially active DL / UL BWP.

[0089] FIG. 7 illustrates physical channels used in a wireless communication system to which the present disclosure can be applied, and a general signal transmission / reception method using these channels.

[0090] In a wireless communication system, a terminal receives information from a base station via a downlink and transmits information to the base station via an uplink. Information exchanged between the base station and the terminal includes data and various control information, and various physical channels exist depending on the type / use of the information exchanged.

[0091] When a terminal is powered on or newly enters a cell, it performs an initial cell search, such as synchronizing with a base station (S701). To this end, the terminal receives a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) from the base station to synchronize with the base station and acquire information such as a cell identifier (ID). Thereafter, the terminal receives a physical broadcast channel (PBCH) from the base station to acquire broadcast information within the cell. Meanwhile, the terminal receives a downlink reference signal (DL RS) during the initial cell search phase to check the downlink channel status.

[0092] After completing the initial cell search, the terminal can acquire more specific system information by receiving a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) based on the information carried on the PDCCH (S702).

[0093] On the other hand, when the terminal first connects to the base station or when there are no radio resources for signal transmission, the terminal can perform a random access procedure (RACH) with the base station (steps S703 to S706). To this end, the terminal can transmit a specific sequence to a preamble via a physical random access channel (PRACH) (S703 and S705) and receive a response message to the preamble via a PDCCH and a corresponding PDSCH (S704 and S706). In the case of a contention-based RACH, a contention resolution procedure can also be performed.

[0094] After performing the above-described procedures, the UE can then perform a general uplink / downlink signal transmission procedure, such as PDCCH / PDSCH reception (S707) and Physical Uplink Shared Channel (PUSCH) / Physical Uplink Control Channel (PUCCH) transmission (S708). In particular, the UE receives downlink control information (DCI) via the PDCCH. Here, the DCI includes control information such as resource allocation information for the UE, and its format varies depending on its purpose.

[0095] Meanwhile, control information that a terminal transmits to a base station via an uplink or receives from a base station includes downlink / 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, a terminal can transmit the above-mentioned control information such as CQI / PMI / RI via a PUSCH and / or a PUCCH.

[0096] FIG. 8 shows an example of mapping physical channels within a slot in a wireless communication system to which the present disclosure can be applied.

[0097] Referring to FIG. 8, a DL control channel, DL or UL data, and a UL control channel are all included in one slot. For example, the first N symbols in a slot are used to transmit the DL control channel (hereinafter referred to as the DL control region), and the last M symbols in the slot are used to transmit the UL control channel (hereinafter referred to as the UL control region). N and M are each an integer greater than or equal to 0. A resource region between the DL control region and the UL control region (hereinafter referred to as the data region) is used to transmit DL data or UL data. A time gap for DL-to-UL or UL-to-DL switching exists between the control region and the data region. The PDCCH is transmitted in the DL control region, and the PDSCH is transmitted in the DL data region. Some symbols at the time of switching from DL to UL within a slot are used as the time gap.

[0098] Downlink (DL) physical channels / signals

[0099] (1) PDSCH

[0100] The PDSCH carries downlink data (e.g., DL-shared channel transport block, DL-SCH TB). The TB is encoded into a codeword (CW) and then transmitted after undergoing scrambling and modulation processes. The CW includes one or more code blocks (CB). One or more CBs are grouped into a CBG (CB group). Depending on the cell configuration, the PDSCH can carry up to two CWs. Scrambling and modulation are performed for each CW, and the modulation symbols generated from each CW are mapped to one or more layers. Each layer is precoded, mapped to resources along with DMRS, and transmitted from the corresponding antenna port. The PDSCH is dynamically scheduled by the PDCCH (configured scheduling) or semi-statically scheduled (configured scheduling, CS) based on higher layer (e.g., RRC) signaling (and / or Layer 1 (L1) signaling (e.g., PDCCH)). Therefore, in dynamic scheduling, PDSCH transmission is accompanied by PDCCH, whereas in CS, PDSCH transmission is not accompanied by PDCCH. CS includes SPS (semi-persistent scheduling).

[0101] (2) PDCCH

[0102] The PDCCH carries Downlink Control Information (DCI). For example, the PCCCH (i.e., DCI) carries the transmission format and resource allocation of 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 a voluntary access response (RAR) transmitted on the PDSCH, transmit power control commands, and information on activation / deactivation of SPS / CS (Configured Scheduling). Various DCI formats are provided depending on the information in the DCI.

[0103] Table 5 illustrates an example of a DCI format transmitted via the PDCCH.

[0104] [Table 5]

[0105] DCI format 0_0 is used to schedule a TB-based (or TB-level) PUSCH, and DCI format 0_1 ​​is used to schedule a TB-based (or TB-level) PUSCH or a Code Block Group (CBG)-based (or CBG-level) PUSCH. DCI format 1_0 is used to schedule a TB-based (or TB-level) PDSCH, and DCI format 1_1 is used to schedule a TB-based (or TB-level) PDSCH or a CBG-based (or CBG-level) PDSCH (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 convey dynamic slot format information (e.g., dynamic SFI) to a UE, and DCI format 2_1 is used to convey downlink pre-emption information to a UE. DCI format 2_0 and / or DCI format 2_1 are transmitted to terminals in a corresponding group via a group common PDCCH, which is a PDCCH transmitted to terminals defined as one group.

[0106] The PDCCH / DCI includes a cyclic redundancy check (CRC), and the CRC is masked / scrambled with various identifiers (e.g., Radio Network Temporary Identifier, RNTI) depending on the owner or use of the PDCCH. For example, if the PDCCH is for a specific terminal, the CRC is masked with a Cell-RNTI (C-RNTI). If the PDCCH is related to paging, the CRC is masked with a P-RNTI (Paging-RNTI). If the PDCCH is related to system information (e.g., System Information Block, SIB), the CRC is masked with a System Information RNTI (SI-RNTI). If the PDCCH is related to an unsolicited access response, the CRC is masked with a Random Access-RNTI (RA-RNTI).

[0107] Table 6 shows an example of the use and transmission channel of the PDCCH according to the RNTI. The transmission channel indicates the transmission channel related to the data carried by the PDSCH / PUSCH scheduled by the PDCCH.

[0108] [Table 6]

[0109] The modulation method of the PDCCH is fixed (e.g., Quadrature Phase Shift Keying, QPSK), and one PDCCH consists of 1, 2, 4, 8, or 16 CCEs (Control Channel Elements) depending on the AL (Aggregation Level). One CCE consists of six REGs (Resource Element Groups). One REG is defined by one OFDM symbol and one (P)RB.

[0110] The PDCCH is transmitted in a CORESET (Control Resource Set). The CORESET corresponds to a set of physical resources / parameters used to carry the PDCCH / DCI in the BWP. For example, the CORESET includes a REG set having a predetermined pneumatics (e.g., SCS, CP length, etc.). The CORESET is configured by system information (e.g., MIB) or UE-specific higher layer (e.g., RRC) signaling. Examples of parameters / information used to configure the CORESET are as follows: One or more CORESETs are configured for one UE, and multiple CORESETs are superimposed in the time / frequency domain.

[0111] - controlResourceSetId: Indicates the identification information (ID) of the CORESET.

[0112] - frequencyDomainResources: Indicates the frequency domain resources of CORESET. It is indicated by a bitmap, and 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 the bit whose bit value is 1 is assigned to the frequency domain resources of CORESET.

[0113] - duration: indicates the time domain resource of CORESET. It indicates the number of consecutive OFDMA symbols that make up CORESET. For example, duration has a value of 1 to 3.

[0114] - cce-REG-MappingType: Indicates the CCE-to-REG mapping type. Interleaved and non-interleaved types are supported.

[0115] - precoderGranularity: indicates the precoder granularity in the frequency domain.

[0116] - tci-StateSPDCCH: Indicates information (e.g., TCI-StateID) indicating the TCI (Transmission Configuration Indication) state for the PDCCH. The TCI state is used to provide the Quasi-Co-Location (QCL) relationship between DL RSs and PDCCH DMRS ports within the RS set (TCI-State).

[0117] - tci-PresentInDCI: Indicates whether the TCI field in the DCI is included or not.

[0118] - pdcch-DMRS-ScramblingID: indicates the information used to initialize the PDCCH DMRS scrambling sequence.

[0119] For PDCCH reception, the UE monitors a set of PDCCH candidates in CORESET (e.g., blind decoding). PDCCH candidates indicate the CCEs that the UE monitors for PDCCH reception / detection. PDCCH monitoring is performed in one or more CORESETs on an active DL BWP in each activated cell where PDCCH monitoring is configured. The set of PDCCH candidates that the UE monitors is defined as a PDCCH Search Space (SS) set. The SS set is a Common Search Space (CSS) set or a UE-specific Search Space (USS) set.

[0120] Table 7 illustrates the PDCCH search space.

[0121] [Table 7]

[0122] SS sets are configured by system information (e.g., MIB) or UE-specific higher layer (e.g., RRC) signaling. S (e.g., 10) or less SS sets are configured for each DL BWP of the serving cell. 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.

[0123] - searchSpaceId: Indicates the ID of the SS set.

[0124] - controlResourceSetId: Indicates the CORESET associated with the SS set.

[0125] - monitoringSlotPeriodicityAndOffset: Indicates the PDCCH monitoring periodicity period (in slot units) and the PDCCH monitoring period offset (in slot units).

[0126] - monitoringSymbolsWithinSlot: Indicates the first OFDMA symbol for PDCCH monitoring within a slot where PDCCH monitoring is configured. It is indicated via a bitmap, where each bit corresponds to each OFDMA symbol within the slot. The MSB of the bitmap corresponds to the first OFDM symbol within the slot. The OFDM symbol corresponding to a bit whose bit value is 1 corresponds to the first symbol of CORESET within the slot.

[0127] - nrofCandidates: Indicates the number of PDCCH candidates for AL={1, 2, 4, 8, 16} (for example, any one of 0, 1, 2, 3, 4, 5, 6, 8).

[0128] - searchSpaceType: Indicates whether the SS type is CSS or USS.

[0129] - DCI format: Indicates the DCI format of the PDCCH candidate.

[0130] Based on the CORESET / SS set configuration, a terminal can monitor PDCCH candidates in one or more SS sets within a slot. An opportunity (e.g., time / frequency resource) for monitoring PDCCH candidates is defined as a PDCCH (monitoring) opportunity. One or more PDCCH (monitoring) opportunities are configured within a slot.

[0131] Uplink (DL) physical channels / signals

[0132] (1) PUSCH

[0133] The PUSCH carries uplink data (e.g., UL-SCH TB) and / or uplink control information (UCI) and is transmitted based on a cyclic prefix-orthogonal frequency division multiplexing (CP-OFDM) waveform or a discrete fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) waveform. When the PUSCH is transmitted based on a DFT-s-OFDM waveform, the terminal applies transform precoding to transmit the PUSCH. For example, when transform precoding is not possible (e.g., transform precoding is disabled), the terminal transmits the PUSCH based on the CP-OFDM waveform, and when transform precoding is possible (e.g., transform precoding is enabled), the terminal transmits the PUSCH based on the CP-OFDM waveform or the DFT-s-OFDM waveform. The PUSCH is 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, PUSCH transmission is accompanied by the PDCCH, but in CS, PUSCH transmission is not accompanied by the PDCCH. CS includes Type-1 CG (Configured Grant) PUSCH transmission and Type-2 CG PUSCH transmission. In Type-1 CG, all parameters for PUSCH transmission are signaled by a higher layer. In Type-2 CG, some parameters for PUSCH transmission are signaled by a higher layer, and the rest are signaled by the PDCCH. Basically, in CS, PUSCH transmission is not accompanied by the PDCCH.

[0134] (2) PUCCH

[0135] The PUCCH carries Uplink Control Information (UCI), which includes:

[0136] -SR (Scheduling Request): Information used to request UL-SCH resources.

[0137] HARQ-ACK (Hybrid Automatic Repeat and reQuest Acknowledgement): A reception acknowledgement signal for DL ​​signals (e.g., PDSCH, SPS release PDCCH). HARQ-ACK responses include positive ACK (simply ACK), negative ACK (NACK), DTX (Discontinuous Transmission), or NACK / DTX. HARQ-ACK is also used interchangeably with A / N, ACK / NACK, HARQ-ACK / NACK, etc. HARQ-ACK is generated on a TB-by-TB basis / CBG-by-CBG basis.

[0138] CSI (Channel Status Information): Feedback information for the DL channel. CSI includes CQI (Channel Quality Information), RI (Rank Indicator), PMI (Precoding Matrix Indicator), PTI (Precoding Type Indicator), etc.

[0139] Table 8 shows examples of PUCCH formats. PUCCH formats are classified according to the UCI payload size, transmission length (e.g., the number of symbols constituting the PUCCH resource), and transmission structure. PUCCH formats are classified into Short PUCCH (formats 0 and 2) and Long PUCCH (formats 1, 3, and 4) according to the transmission length.

[0140] [Table 8]

[0141] (0) PUCCH Format 0 (PF0)

[0142] -Supportable UCI payload size: up to K bits (e.g., K = 2)

[0143] Number of OFDM symbols constituting a single PUCCH: 1 to X symbols (e.g., X = 2)

[0144] - Transmission structure: Consists of only UCI signals without DM-RS, and transmits UCI status by selecting and transmitting one of multiple sequences

[0145] (1) PUCCH Format 1 (PF1)

[0146] -Supportable UCI payload size: up to K bits (e.g., K = 2)

[0147] Number of OFDM symbols constituting a single PUCCH: Y to Z symbols (e.g., Y = 4, Z = 14)

[0148] - Transmission structure: DM-RS and UCI are configured in TDM format on different OFDM symbols, and UCI is a form in which a specific sequence is modulated (e.g., QPSK) symbols are multiplied. CS (cyclic shift) / OCC (orthogonal cover code) is applied to both UCI and DM-RS, and CDM is supported between multiple PUCCH resources (according to PUCCH format 1) (within the same RB).

[0149] (2) PUCCH Format 2 (PF2)

[0150] -Supportable UCI payload size: up to K bits (e.g., K = 2)

[0151] Number of OFDM symbols constituting a single PUCCH: 1 to x symbols (e.g., X = 2)

[0152] Transmission structure: DMRS and UCI are configured / mapped in the same symbol in FDM format, and are transmitted by applying only IFFT to the coded UCI bits without DFT.

[0153] (3) PUCCH Format 3 (PF3)

[0154] -Supported UCI payload size: K bits or more (e.g., K = 2)

[0155] Number of OFDM symbols constituting a single PUCCH: Y to Z symbols (e.g., Y = 4, Z = 14)

[0156] - Transmission structure: DMRS and UCI are configured / mapped to different symbols in TDM format, and the coded UCI bits are transmitted after applying DFT. OCC is applied to UCI before DFT, and CS (or IFDM mapping) is applied to DMRS to support multiplexing to multiple terminals.

[0157] (4) PUCCH Format 4 (PF4)

[0158] -Supported UCI payload size: K bits or more (e.g., K = 2)

[0159] Number of OFDM symbols constituting a single PUCCH: Y to Z symbols (e.g., Y = 4, Z = 14)

[0160] Transmission structure: DMRS and UCI are configured / mapped to different symbols in TDM format, and the coded UCI bits are transmitted without inter-terminal multiplexing by applying DFT.

[0161] Beam Management (BM)

[0162] The 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 a terminal (e.g., UE) that can be used for transmitting / receiving downlink (DL) and uplink (UL), and may include the following procedures and terms:

[0163] Beam measurement: An operation in which a base station or UE measures the characteristics of a received beamformed signal.

[0164] -Beam determination: The operation in which a base station or a UE selects its own transmit beam (Tx beam) / receive beam (Rx beam).

[0165] Beam sweeping: The act of covering a spatial region using transmit and / or receive beams at regular time intervals in a predetermined manner.

[0166] Beam report: An operation in which a UE reports information about a beamformed signal based on beam measurements.

[0167] 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).

[0168] Each BM procedure may also include Tx beam sweeping to determine the Tx beam and Rx beam sweeping to determine the Rx beam.

[0169]

[0170] The DL BM procedure can include (1) transmission for beamformed DL RS (reference signal) of a base station (e.g., CSI-RS or SS block (SSB)), and (2) beam reporting of a terminal.

[0171] Here, the beam report can include preferred DL RS ID(s) (identifier) and the corresponding L1-RSRP (Reference Signal Received Power).

[0172] The DL RS ID can be an SSBRI (SSB Resource Indicator) or a CRI (CSI-RS Resource Indicator).

[0173] As shown in FIG. 9, the SSB beam and the CSI-RS beam can be used for beam measurement. The measurement metric is the per-resource / block L1-RSRP. 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.

[0174] Rx beam sweeping using the SSB can be performed while the UE changes the Rx beam for the same SSBRI across multiple SSB bursts. Here, one SS burst includes one or more SSBs, and one set of SS bursts includes one or more SSB bursts.

[0175]

[0176] FIG. 10 is a flowchart illustrating an example of a DL BM procedure using SSB.

[0177] Configuration for beam reporting using SSB is performed during CSI / beam configuration in the RRC connected state (or RRC connected mode).

[0178] The terminal receives a CSI-ResourceConfig IE including a CSI-SSB-ResourceSetList including SSB resources used for the BM from the base station (S410).

[0179] As in the CSI-ResourceConfig IE in Table 9, the BM configuration using SSB is not separately defined, and the SSB is configured as a CSI-RS resource.

[0180] [Table 9]

[0181] In Table 9, the csi-SSB-ResourceSetList parameter indicates a list of SSB resources used for beam management and reporting in one resource set. Here, the SSB resource set can be set to {SSBx1, SSBx2, SSBx3, SSBx4, ...}. The SSB index can be defined from 0 to 63.

[0182] The terminal receives SSB resources from the base station based on the CSI-SSB-ResourceSetList (S420).

[0183] If a CSI-RS reportConfig associated with reporting on SSBRI and L1-RSRP is configured, the terminal reports (beams) the best SSBRI and the corresponding L1-RSRP to the base station (S430).

[0184] 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.

[0185] 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".

[0186] Here, the QCL TypeD can mean that it is 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 reception 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.

[0187]

[0188] Regarding the CSI-RS usage, i) when the repetition parameter is set in 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.

[0189] Such a repetition parameter can only be set for a CSI-RS resource set associated with L1 RSRP or a CSI-ReportConfig having a report of "No Report (or None)".

[0190] If a terminal receives a CSI-ReportConfig with reportQuantity set to 'cri-RSRP' or 'none' and a 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' set, the terminal can be configured with only ports of the same number (1-port or 2-port) having the higher layer parameter 'nrofPorts' for all CSI-RS resources in the NZP-CSI-RS-ResourceSet.

[0191] When the (higher layer parameter) repetition is set to 'ON', this is related to the Rx beam sweeping procedure of the UE. In this case, when the UE receives the configuration of NZP-CSI-RS-ResourceSet, the UE 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 via the same Tx beam. Here, at least one CSI-RS resource in the NZP-CSI-RS-ResourceSet can be transmitted in different OFDM symbols. In addition, the UE does not expect all CSI-RS resources in the NZP-CSI-RS-ResourceSet to receive different periodicities in periodicityAndOffset.

[0192] On the other hand, when Repetition is set to "OFF", this is related to the Tx beam sweeping procedure of the base station. 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 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 via a different Tx beam.

[0193] Fig. 11 is a diagram showing an example of a DL BM procedure using CSI-RS. Fig. 11a shows a procedure for determining (or improving) an Rx beam of a terminal, and Fig. 11b shows a procedure for determining a Tx beam of a base station. Fig. 11a shows a case where the repetition parameter is set to "ON", and Fig. 11b shows a case where the repetition parameter is set to "OFF".

[0194] Referring to Figures 11a and 12, the process of determining the Rx beam of the terminal will be described.

[0195] FIG. 12 is a flowchart showing an example of a process for determining a receiving beam of a terminal.

[0196] The terminal receives an NZP CSI-RS resource set IE including a repetition parameter of an upper layer from the base station via RRC signaling (S610), where the repetition parameter is set to "ON".

[0197] The terminal repeatedly receives resources in the CSI-RS resource set repeatedly set to "ON" through the same Tx beam (or DL ​​spatial domain transmit filter) of the base station with different OFDM symbols (S620).

[0198] The terminal determines its own Rx beam (S630).

[0199] The terminal omits the CSI report or transmits a CSI report including CRI / L1-RSRP to the base station (S640). In this case, the reportQuantity of the CSI report config can be set to "No report (or None)" or "CRI and L1-RSRP."

[0200] That is, the terminal may omit CSI reporting if repeatedly set to "ON".

[0201] Referring to Figures 11b and 13, the process of determining the Tx beam of the base station will be explained.

[0202] FIG. 13 is a flowchart showing an example of a process for determining a transmission beam of a base station.

[0203] The terminal receives an NZP CSI-RS resource set IE including repetition of higher layer parameters from the base station via RRC signaling (S710).

[0204] Here, the repeat parameter is set to "OFF" and is associated with the base station's Tx beam sweeping procedure.

[0205] In addition, the terminal repeatedly receives resources in the CSI-RS resource set that are set to "OFF" through different Tx beams (DL spatial domain transmit filters) of the base station (S720).

[0206] 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).

[0207] In this case, the reportQuantity of the CSI report config can be set to "CRI + L1-RSRP".

[0208] FIG. 14 is a diagram illustrating an example of resource allocation in the time and frequency domains associated with the operation of FIG.

[0209] That is, when a CSI-RS resource set is repeatedly set to "ON", multiple CSI-RS resources are repeatedly used by applying the same transmission beam, and when a CSI-RS resource set is repeatedly set to "OFF", different CSI-RS resources are transmitted to different transmission beams.

[0210] <dl bm関連のビーム指示(beam indication)>

[0211] The terminal may receive an RRC configuration for a list of up to M candidate Transmission Configuration Indication (TCI) states, at least for the purpose of Quasi Co-location (QCL) indication, where M may be 64.

[0212] Each TCI state can be configured to one RS set. At least the ID of each DL RS for spatial QCL purpose (QCL Type D) in the RS set can refer to one of the DL RS types, such as SSB, P-CSI RS, SP-CSI RS, and A-CSI RS.

[0213] Initialization / update of IDs of DL RSs in the RS set used at least for spatial QCL purposes may be accomplished at least via explicit signaling.

[0214] Table 10 shows an example of a TCI-State IE.

[0215] The TCI-State IE is associated with the corresponding quasi co-location (QCL) type of one or two DL reference signals (RS).

[0216] [Table 10]

[0217] In Table 10, the bwp-Id parameter indicates the DL BWP where the RS is located, the cell parameter indicates the carrier where the RS is located, and the referencesignal parameter indicates the reference antenna port or a reference signal including the reference antenna port that will be the source of quasi co-location for the corresponding target antenna port. The target antenna port may be a CSI-RS, a PDCCH DMRS, or a PDSCH DMRS. As an example, to indicate RS information of the QCL reference for the NZP CSI-RS, a corresponding TCI state ID may be indicated in resource configuration information of the NZP CSI-RS. As another example, to indicate QCL reference information for the PDCCH DMRS antenna port, a TCI state ID may be indicated in the configuration of each CORESET. As another example, to indicate QCL reference information for the PDSCH DMRS antenna port, a TCI state ID may be indicated via DCI.

[0218] <QCL(Quasi-Co Location)>

[0219] Antenna ports are defined such that the channel on which symbols on an antenna port are carried can be inferred from the channel on which other symbols on the same antenna port are carried. If the properties of the channel on which symbols on one antenna port are carried can be inferred from the channel on which symbols on the other antenna port are carried, then the two antenna ports are said to be in a QC / QCL (quasi co-located or quasi co-located) relationship.

[0220] Here, the channel characteristics include one or more of delay spread, Doppler spread, frequency / Doppler shift, average received power, received timing / average delay, and spatial RX parameter, where spatial RX parameter refers to a spatial (reception) channel characteristic parameter such as angle of arrival.

[0221] The UE may be configured to a list of up to M TCI-State configurations in the upper layer parameter PDSCH-Config to decode the PDSCH according to the detected PDCCH having DCI intended for the UE and a given serving cell, where M depends on the UE capability.

[0222] Each TCI-State includes parameters for setting a quasi co-location relationship between one or two DL reference signals and a DM-RS port of a PDSCH.

[0223] The quasi co-location relationship is set in the higher layer parameters qcl-Type1 for the first DL RS and qcl-Type2 (if set) for the second DL RS. For two DL RSs, the QCL types are not the same, regardless of whether they refer to the same DL RS or different DL RSs.

[0224] The quasi co-location type corresponding to each DL RS is given by the higher layer parameter qcl-Type of QCL-Info and can take one of the following values:

[0225] - "QCL-TypeA": {Doppler shift, Doppler spread, average delay, delay spread}

[0226] - "QCL-TypeB": {Doppler shift, Doppler spread}

[0227] - "QCL-TypeC": {Doppler shift, average delay}

[0228] - "QCL-TypeD":{Spatial Rx parameter}

[0229] For example, if the target antenna port is a specific NZP CSI-RS, the corresponding NZP CSI-RS antenna port may be instructed / configured to be QCL-associated with a specific TRS from the perspective of QCL-Type A and a specific SSB from the perspective of QCL-Type D. A terminal receiving such instruction / configuration may receive the corresponding NZP CSI-RS using the Doppler and delay values ​​measured in the QCL-Type A TRS and apply the receive beam used for receiving the QCL-Type D SSB to receive the corresponding NZP CSI-RS.

[0230] The UE receives an activation command that is used to map up to eight TCI states to codepoints in the DCI field "Transmission Configuration Indication."

[0231]

[0232] Depending on the implementation of the terminal, the UL BM may or may not have beam reciprocity (or beam correspondence) between the Tx beam and the Rx beam. If the Tx beam-Rx beam reciprocity is established at both the base station and the terminal, the UL beam pair can be matched through the DL beam pair. However, if the Tx beam-Rx beam reciprocity is not established at either the base station or the terminal, a UL beam pair determination process is required separately from the DL beam pair determination.

[0233] Also, 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 requesting the terminal to report its preferred beam.

[0234] UL BM can be performed via beamformed UL SRS transmission, and the applicability of UL BM for an SRS resource set is configured by the higher layer parameter usage. If usage is set to 'BeamManagement (BM)', only one SRS resource can be transmitted for each of multiple SRS resource sets at a given time instant.

[0235] A UE may be configured (via higher layer signaling, RRC signaling, etc.) with one or more Sounding Reference Symbol (SRS) resource sets configured by (higher layer parameter) SRS-ResourceSet. For each SRS resource set, the UE may be configured with K≧1 SRS resources (higher layer parameter SRS-Resource), where K is a natural number and the maximum value of K is indicated by SRS_capability.

[0236] Similar to DL BM, the UL BM procedure can also be divided into Tx beam sweeping of the UE and Rx beam sweeping of the base station.

[0237] Figure 15 shows an example of a UL BM procedure using SRS. Specifically, Figure 15a shows the procedure for determining an Rx beam by a base station, and Figure 15b shows the procedure for determining a Tx beam by a terminal.

[0238] FIG. 16 is a flowchart illustrating an example of a UL BM procedure using an SRS.

[0239] The terminal receives RRC signaling (e.g., SRS-Config IE) from the base station including usage parameters (higher layer parameters) set to "beam management" (S1010).

[0240] Table 11 shows an example of an SRS-Config Information Element (IE), which is used for SRS transmission 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.

[0241] The network triggers the transmission of the SRS resource set using the configured aperiodicSRS-ResourceTrigger (L1 DCI).

[0242] [Table 11]

[0243] In Table 11, "usage" indicates a parameter of an upper layer that indicates whether the SRS resource set is used for beam management or for codebook-based or non-codebook-based transmission. 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 for each SRS resource set.

[0244] The UE determines a Tx beam for the SRS resource to be transmitted based on the SRS-SpatialRelation Info included in the SRS-Config IE (S1020). Here, the SRS-SpatialRelation Info is configured for each SRS resource and indicates whether the same beam as that used in SSB, CSI-RS, or SRS is applied for each SRS resource. In addition, the SRS-SpatialRelationInfo may or may not be configured for each SRS resource.

[0245] If SRS-SpatialRelationInfo is set for the SRS resource, the same beam as that used for SSB, CSI-RS, or SRS is applied for transmission. However, if SRS-SpatialRelationInfo is not set for the SRS resource, the terminal arbitrarily determines a Tx beam and transmits the SRS through the determined Tx beam (S1030).

[0246] More specifically, for P-SRS with "SRS-ResourceConfigType" set to "periodic"

[0247] i) If SRS-SpatialRelationInfo is set to 'SSB / PBCH', the UE applies a spatial domain transmit filter that is the same as (or is generated from) the spatial domain Rx filter used to receive SSB / PBCH to transmit the corresponding SRS resource; or

[0248] ii) if SRS-SpatialRelationInfo is set to "CSI-RS", the UE transmits SRS resources with the same spatial domain transmit filter used for receiving periodic CSI-RS or SP CSI-RS, or

[0249] iii) If SRS-SpatialRelationInfo is set to 'SRS', the UE applies the same spatial domain transmission filter used for transmitting periodic SRS to transmit the corresponding SRS resource.

[0250] The same can be applied when 'SRS-ResourceConfigType' is set to 'SP-SRS' or 'AP-SRS'.

[0251] Furthermore, the terminal may or may not receive feedback on the SRS from the base station in the following three cases (S1040).

[0252] i) If Spatial_Relation_Info is configured for all SRS resources in the SRS resource set, the terminal transmits the SRS using the beam specified by the base station. For example, if all Spatial_Relation_Info specifies the same SSB, CRI, or SRI, the terminal repeatedly transmits the SRS using the same beam. In this case, the base station selects the Rx beam, which corresponds to Figure Ga.

[0253] ii) Spatial_Relation_Info may not be set for all SRS resources in the SRS resource set. In this case, the terminal can freely change the SRS beam while transmitting. In other words, in this case, the terminal selects the Tx beam, which corresponds to Gb in the figure.

[0254] iii) Spatial_Relation_Info can be configured only for some SRS resources in the SRS resource set. In this case, the SRS is transmitted in the designated beam for the configured SRS resources, and the UE can arbitrarily apply a Tx beam for the SRS resources for which Spatial_Relation_Info is not configured.

[0255] NES (network energy saving)

[0256] Energy conservation in base stations is an important consideration in wireless communication systems, including 3GPP, because it contributes to reducing carbon emissions, building environmentally friendly networks, and reducing operational expenditures (OPEX) for telecommunications carriers. In particular, the introduction of 5G communications requires higher transmission rates, so base stations must be equipped with more antennas and provide services over wider bandwidths and frequency bands. As a result, recent studies have shown that base station energy costs could reach as much as 20% of total OPEX. Therefore, 5G systems are adopting various technologies to reduce energy consumption, known as network energy savings (NES), and standardization of related technologies is expected to continue. Specifically, the following techniques were discussed in the recently concluded Rel-18:

[0257] [Table 12]

[0258] By applying the NES technology, the base station can perform operations such as adjusting on / off for a certain time duration on the time axis, adjusting transmission / reception resources for UE-common or UE-specific signals / channels, changing the amount of frequency axis resources, adjusting transmission power, or turning on / off antenna ports, transmission-reception points (TRPs), etc. in the spatial domain.

[0259] FIG. 17 shows an example of an operation procedure of a base station supporting the NES technology. Referring to FIG. 17, the base station confirms the NES solution(s) to be applied. The NES solution(s) is associated with signal transmission / reception control (e.g., on / off), beam operation, handover procedures, channel measurement, and reporting. The NES solution(s) to be applied may be adaptively selected or predefined depending on the current situation (e.g., cell load level, characteristics of connected terminals, etc.). The base station, having confirmed the NES solution(s), performs signaling for the NES. The specific signaling procedure may vary depending on the confirmed NES solution(s). For example, the base station may transmit common information for the NES solution(s), or transmit configuration information required for the NES operation to at least one terminal, or transmit control information for the progress of the NES operation to at least one terminal. The base station may also receive capability information related to the NES from at least one terminal. Thereafter, the base station performs operations for the NES. At this time, the base station may perform operations for the NES based on the previously performed signaling. That is, based on the system information, configuration information, and control information transmitted via signaling, the base station can turn on / off the transmission and reception of specific signals, turn on / off elements in the spatial domain, or adjust resources for the transmission and reception of measurement signals.

[0260] The NES technique can be implemented through the procedure shown in Figure 17. An example of an NES solution that can be implemented through the procedure shown in Figure 17 is as follows.

[0261] Intra-system energy saving solution: A RAN node can request neighboring RAN nodes to switch at least one SSB beam to its inactive cell, or can perform paging using a beam set limited to inactive terminals (e.g., stationary terminals).

[0262] Inter-system energy-saving solution: An NG-RAN node that owns a capacity booster cell can autonomously convert the cell into an inactive state.

[0263] SSB-less SCell solution: If SSB or SMTC (SSB-based RRM measurement timing configuration) configuration for an SCell is not provided, the UE can obtain the timing reference and AGC source from another serving cell. In FR1 or FR2, the base station can configure intra-band CA or inter-band CA including an SCell without SSB transmission. In this case, SSB / SIB transmission can be triggered by the UE's WUS (wake-up signal). As a result, the period of common channels / signals such as SSB increases, so the base station stays in sleep state for a longer period of time.

[0264] Cell DTX / DRX solution: To reduce the downlink transmission / uplink reception activity time of a base station, a periodic cell DTX / DRX pattern (e.g., active and inactive periods) can be configured commonly for terminals in a cell having the corresponding feature. Here, the cell DTX pattern and cell DRX pattern can be configured and activated separately, and up to two cell DTX / DRX patterns can be configured per MAC entity. When cell DTX is configured and activated, at least one of monitoring for SPS opportunities or monitoring for PDCCH can be suspended during the cell DTX inactive period. When cell DRX is configured and activated, at least one of transmission on CG resources or SR transmission can be suspended during the cell DRX inactive period. Cell DTX / DRX can be activated / deactivated via RRC signaling or L1 group common signaling.

[0265] Parameters such as the active duration and cycle can be configured for cell DTX / DRX. The active duration is the period during which the UE waits to receive a PDCCH or SPS opportunity to transmit an SR or CG, and the cycle specifies the periodic repetition of the active and inactive periods. When both cell DTX and cell DRX are configured, parameters such as the active duration and cycle are common. If the base station recognizes an emergency call or public safety-related service (e.g., MPS or MCS), the network can deactivate or deactivate the cell DTX / DRX configuration without affecting the corresponding service. In addition, at least some overlap is required between the active period of the UE's connected mode DRX and the active period of the cell DTX / DRX. For example, the UE's connected mode DRX cycle may be a multiple of the cell DTX / DRX cycle, or vice versa.

[0266] Conditional handover (CHO) solution: A CHO procedure performed in such a way that handover execution is determined by the UE is used while the NES technique is applied (e.g., when a cell activates or turns off cell DTX / DRX). In this case, the UE can use an NES-specific CHO event to perform CHO for a candidate cell, and for this, reception of a DCI that activates the CHO condition(s) set in the NES event indication can be applied as an additional triggering condition.

[0267] Spatial and power domain adaptation solution: To support gNBs in transceiver muting and / or transmit power adaptation, the terminal can be configured to report multiple CSI entries in a 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 power offset between the data channel (e.g., PDSCH) and the CSI-RS. The application of the spatial and power domain adaptation solution can affect the CSI configuration, measurement, and / or reporting behavior.

[0268] CSI Measurement and Reporting

[0269] FIG. 18 shows an example procedure for CSI measurement and reporting.

[0270] Referring to FIG. 18, a base station transmits configuration information for CSI to a terminal. The configuration information for CSI may include information related to a CSI-RS resource or resource set (e.g., time-frequency resource information, sequence information, power information, etc.), information related to a CSI report (e.g., report quantity information, report type information, report resource information, codebook information, etc.), information related to CSI measurement, etc. Here, to assist the base station in transceiver muting and / or transmit power adaptation of the base station, the terminal may be configured to report multiple CSI entries in a CSI report based on multiple subsets. Here, each subset 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 layer parameters (e.g., CSI-ReportConfig) included in the configuration information may include a list of sub-configurations, each of which is identified by an identifier (e.g., csi-ReportSubConfigID) and may correspond to a list of at least one CSI-RS resource, or a CSI-RS antenna port subset, and / or a power offset for the PDSCH associated with the CSI-RS in addition to power control offset-related parameters (e.g., powerControlOffset) for the CSI-RS resource(s).

[0271] In this case, the CSI-related configuration may include multiple subsets. Therefore, when analyzing the configuration information for CSI, the UE can determine the CSI-RS resource, CSI-RS port mapping, power offset, codebook type, reporting items, etc., taking the subsets into consideration. When the UE is configured with CSI reporting-related configuration information (e.g., CSI-ReportConfig) including subsets, the UE does not expect that the upper layer parameters (e.g., reportQuantity) related to the reporting items are 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, when the CSI reporting type is configured as semi-persistent CSI reporting or aperiodic CSI reporting, the base station can activate / trigger only some of the subsets configured in the UE via MAC-CE or DCI. That is, the trigger state of aperiodic CSI reporting can be set as needed, and whether or not to activate semi-static CSI reporting can be controlled by an activation command.

[0272] For example, in connection with the configuration for a report item, the UE may determine the CSI-RS port index(es) for each CSI-RS resource based on information related to a port-subset per subset (hereinafter referred to as a "port-subset indicator"). The port-subset indicator may include a bitmap for identifying a portion of the antenna ports for the corresponding CSI-RS resource. Thus, the UE may identify at least one antenna port for the corresponding subset based on the position of a bit set to a positive value (e.g., 1) in the port-subset indicator.

[0273] For example, in relation to the setting for the reporting item, the UE may determine the codebook type based on whether a sub-setting exists. Specifically, if a sub-setting is set for the CSI reporting, the UE may exclude the setting of at least one codebook type. However, depending on the capability of the UE, the at least one codebook type may be set.

[0274] For example, in relation to the configuration of the report item, a power offset value and an NZP CSI-RS resource set may be configured for each subset. In this case, the analysis of the NZP CSI-RS resource set for each subset may vary depending on whether a power offset value for each subset is configured and whether an NZP CSI-RS resource set is configured.

[0275] When determining the CQI, a higher layer parameter (e.g., timeRestrictionForChannelMeasurements) related to a time restriction for channel measurement can be set. In this case, the UE should derive a channel estimate for determining the CSI based on the latest CSI reference resource. At this time, if the cell DTX for the base station is activated, the cell DTX active time can be taken into consideration.

[0276] 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 a band associated with the derived CSI in the frequency domain, and is defined as one downlink slot determined based on higher layer parameters and subcarrier spacing in the time domain. After receiving the CSI-RS, the UE should transmit the CSI report without delay from the CSI reference resource. At this time, if a subset is configured for the CSI report, the CSI reference resource is considered for each subset.

[0277] When configured to report at least one of a CQI index, PMI, and RI, the UE may assume specific values ​​for the symbol positions and number occupied for control signaling, the number of PDSCH and DMRS symbols, the subcarrier spacing of BWP, the bandwidth for CQI reporting, the CP length and subcarrier spacing of the reference resource, RV (redundancy version), etc., in order to derive at least one of a CQI index, PMI, and RI in the CSI reference resource. In this case, when a sub-configuration is configured for CSI reporting, assumptions for antenna ports, EPRE, etc. may be determined based on the sub-configuration.

[0278] Next, the base station transmits at least one CSI-RS, so that the terminal can receive the at least one CSI-RS and perform measurements. The at least one CSI-RS can be transmitted via a CSI-RS resource or resource set configured by the configuration information.

[0279] At this time, if the UE is configured for DRX, the UE may perform measurements as follows: For example, if the UE is configured to monitor power saving related control information (e.g., DCI format 2_6) and a DRX-related timer (e.g., drx-onDurationTimer) is not started due to a higher layer parameter (e.g., ps-TransmitOtherPeriodicCSI), and is configured to report CSI using a reporting configuration type set by periodic reporting and a reporting item set to another item other than cri-RSRP and ssb-index-RSRP, the latest CSI measurement occasion occurs during the DRX active time or the time indicated by drx-onDurationTimer in DRX-related configuration information (e.g., DRX-Config) other than the DRX active time for the CSI to be reported. As another example, if the UE is configured to monitor power saving related control information (e.g., DCI format 2_6) and is configured to report L1-RSRP using the reporting configuration type set by periodic reporting and the reporting item set in cri-RSRP when the drx-onDurationTimer has not started due to higher layer parameters (e.g., ps-TransmitPeriodicL1-RSRP), the latest CSI measurement occasion occurs during the DRX active time or the time indicated by the drx-onDurationTimer in the DRX-related configuration information (e.g., DRX-Config) other than the DRX active time for the reported CSI. Otherwise, the latest CSI measurement occasion occurs within the DRX active time for the reported CSI.

[0280] Meanwhile, the base station may perform cell DTX / DRX operation. In this case, during the inactive period of the cell DTX, the terminal configured for the cell DTX does not expect to receive the periodic CSI-RS and semi-static CSI-RS configured in the CSI reporting configuration associated with the report item including at least an RI (rank indicator). When the cell DTX is activated for the serving cell, the latest CSI measurement occasion for the semi-static CSI-RS resource or the periodic CSI-RS resource occurs within the active period of the cell DTX for CSI reporting configured by the configuration information (e.g., CSI-ReportConfig) related to the CSI report associated with the report item including at least an RI.

[0281] A UE that has received at least one CSI-RS determines the CSI. That is, the UE performs CSI calculation. At this time, the UE may perform CSI calculation based on CSI processing criteria. The UE may indicate the number of supported simultaneous CSI calculations, i.e., the number of CSI processing units (CPUs) that can proceed simultaneously (NCPU). The UE may determine the number of CPUs for a corresponding CSI report based on at least one of NCPU, the number of CPUs for each CSI report, the number of currently occupied CPUs, and a reporting item configuration. For example, for configuration information (e.g., CSI-ReportConfig) related to CSI reporting that includes a reporting item parameter (e.g., reportQuantity) that is not set to 'none,' the CPU(s) may be occupied for at least one OFDM symbol, where the number of at least one symbol may be determined based on the CSI-RS resource or CSI-IM resource associated with the sub-configuration.

[0282] When configuration information related to CSI reporting (e.g., CSI-ReportConfig) includes multiple sub-configurations, the number of CPUs occupied by CSI reporting is determined based on the number of CSI-RS resources corresponding to the sub-configurations. In this case, the number of CSI-RS resources may be determined based on the number of times referred to in configuration information related to CSI reporting (e.g., CSI-ReportConfig) or the number of sub-configurations that refer to the corresponding CSI-RS resources.

[0283] The terminal that has determined the CSI can transmit a CSI report to the base station. The terminal can transmit CSI(s) for at least one sub-configuration according to a report item parameter (e.g., reportQuantity) configured for configuration information (e.g., CSI-ReportConfig) related to the CSI report. For example, the CSI report can include at least one of PMI, CQI, RI, CRI, SSBRI, LI, and RSRP. In this case, the CSI report can include a part 1 CSI report and a part 2 CSI report. In addition, the CSI report can be transmitted via at least one of the PUCCH or PUSCH.

[0284] When the terminal multiplexes a CSI report including a part 2 CSI report into a PUCCH resource, the terminal determines the PUCCH resource and the number of PRBs for the PUCCH resource 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 the rank combination {1, 1}. When an upper layer parameter related to the CSI reporting mode (e.g., csi-ReportMode) is set to “Mode 2,” the terminal determines the PUCCH resource and the number of PRBs for the PUCCH resource or the number of part 2 CSI reports under the assumption that each CRI of the CSI report is associated with a resource pair.

[0285] If a CSI report on a PUSCH includes two parts, the terminal may omit part of Part 2 CSI. The omission of Part 2 CSI follows a priority order. When omitting Part 2 CSI information for a particular priority level, the terminal shall exclude all information at that priority level, except when the corresponding CSI report includes at least one CSI sub-report including Part 2 corresponding to a subset from the list of subsets provided by higher layer parameters (e.g., csi-ReportSubConfigList) included in information related to the CSI report (e.g., CSI-ReportConfig).

[0286] For a reporting configuration associated with information related to CSI reporting (e.g., CSI-ReportConfig) that includes a list of subsets, the following processing is possible: For a corresponding CSI report that includes at least one CSI sub-report, omission of Part 2 CSI is performed at subset levels within the same priority level, where a subset with a lower index value has a higher priority.

[0287] If any CSI report consists of two parts, the terminal can omit part of Part 2 CSI. The omission of Part 2 CSI follows a priority order. For a reporting configuration associated with CSI reporting-related information (e.g., CSI-ReportConfig) including a list of sub-configurations, for a given CSI report that includes at least one CSI sub-report, the omission of Part 2 CSI is defined in Section 5.2.3. Part 2 CSI is omitted starting from the lowest priority level up to the Part 2 CSI code rate that is less than or equal to the code rate set by a higher layer parameter (e.g., maxCodeRate).

[0288] In addition, when a CQI request field in the DCI triggers CSI report(s) on the PUSCH, the first uplink symbol carrying the CSI report(s) does not precede a symbol specified after a certain interval from the last symbol of the PDCCH carrying the corresponding DCI. This can be understood as being for ensuring CSI calculation time. In this case, if multiple subsets are configured for CSI reporting, the start position of the certain interval can be determined based on all triggered subsets.

[0289] Full duplex operation for NR

[0290] As examples of methods for applying intra-carrier full duplex (FD), subband-wise FD (SB-FD) and spectrum-sharing FD (SS-FD) can be considered, as shown in Figures 19a and 19b. In the case of SB-FD, DL and UL transmission and reception are performed using different frequency resources on the same carrier. That is, DL and UL have different frequency resources for the same time resource. In the case of SS-FD, DL and UL transmission and reception are performed using the same frequency resource or overlapping frequency resources on the same carrier. That is, DL and UL can have the same or overlapping frequency resources for the same time resource.

[0291] Such FD operation can be used in combination with existing half-duplex operation. In existing half-duplex-based TDD operation, only some time resources can be used for FD operation. SB-FD or SS-FD operation can be performed in the time resources for performing FD operation.

[0292] 20a and 20b show an example in which time resources operating in HD (half duplex) and time resources operating in FD such as SB-FD or SS-FD coexist. In FIG. 20a, some time resources operate in SB-FD and the remaining time resources operate in HD, while in FIG. 20b, some time resources operate in SS-FD and the remaining time resources operate in HD. In this case, the unit of the time resources is, for example, a slot or a symbol.

[0293] In time resources operating in SB-FD, some frequency resources are used as DL resources and some frequency resources are used as UL resources. A guard band (or guard frequency resource or guard subcarrier(s)) can exist between the DL and UL frequency resources, which are not used for DL ​​and UL. In time resources operating in SS-FD, the entire frequency resource can be used for both DL and UL. Alternatively, to reduce the impact of interference from other adjacent carriers (e.g., adjacent carrier interference (ACI)), some frequency resources on one or both ends of the carrier are not used for DL ​​and / or UL. That is, one or both ends of the carrier can be used as a guard band that is not used for both DL and UL. Alternatively, to reduce the impact of ACI on UL reception, one or both ends of the carrier can be used only for DL ​​transmission.

[0294] In this disclosure, slot resources operating in HD are referred to as HD slots, slot resources operating in SB-FD and slot resources operating in SS-FD are referred to as SB-FD slots and SS-FD slots, respectively. SS-FD slots and SS-FD slots are also commonly referred to as FD slots.

[0295] In this disclosure, among all frequency resources in the time resource operating in FD, the frequency resource operating in DL is called a DL subband, and the frequency resource operating in UL is called a UL subband.

[0296] In the case of the FD operation described above, the FD operation can be performed from both the gNB's perspective and the UE's perspective. That is, both the gNB and the UE can simultaneously perform DL and UL transmission and reception using the same or different frequency resources in the same time resource. Alternatively, only the gNB can perform FD operation, and the UE can perform half-duplex operation. The gNB can simultaneously perform DL and UL transmission and reception using the same or different frequency resources in the same time resource, but the UE only performs DL reception or UL transmission in a specific time resource. In this case, the gNB performs FD operation by performing DL transmission and UL reception with different UEs at the same time.

[0297] The base station may perform FD operation and the terminal may perform half-duplex operation, or the base station may perform half-duplex operation and the terminal may perform FD operation, or both the base station and the terminal may support FD operation.

[0298] A terminal that knows that a base station can perform FD operation can be called an FD-aware UE. A terminal that knows that a base station can perform subband non-overlapping FD (e.g., SBFD) operation can be called an SBFD-aware UE. A terminal that knows that a base station can perform spectrum shared (or subband overlapping) FD (e.g., SSFD) operation can be called an SSFD-aware UE.

[0299] If the base station supports half-duplex and FD operations, it can notify the terminal of information regarding resources (time or frequency, or both time and frequency) on which half-duplex and FD can be performed, are expected to be performed, or will be performed.

[0300] When a base station can perform SSFD operation, in the case of an FD base station, this can mean that UL reception is possible simultaneously on some / all frequency resources in the frequency resources in which the base station can perform DL transmission. That is, not only DL transmission / reception but also UL reception / transmission is possible on any frequency resource. In this case, in the case of SSFD, information on frequency resources in which SSFD is possible can be transmitted. And, information on time resources in which SSFD is possible can be transmitted.

[0301] In the case of an FD terminal, this may mean that UL transmission is possible simultaneously on some / all frequency resources in which the terminal is capable of DL reception. In the present invention, a terminal that performs half-duplex operation is referred to as an HD terminal, and a terminal that can perform or does perform FD operation is referred to as an FD terminal.

[0302] When a base station performs FD operations such as SBFD and SSFD, it may perform SSFD and / or SBFD operations only on some time / frequency resources. In the case of an SBFD-aware UE and / or SSFD-aware UE, if the cell knows the time / frequency resources on which it performs SSFD and / or SBFD operations, the cell may perform the operation of the terminal differently depending on the resources on which it operates in half-duplex (HD), the resources on which it operates in SBFD, and the resources on which it operates in SSFD. As an example, the terminal may determine the time / frequency resources on which it receives DL signals / channels and / or transmits UL signals / channels differently depending on the HD resources, SBFD resources, and SSFD resources, and perform transmission and reception.

[0303] In time resources operating in HD, the gNB performs half-duplex operation, performing only one of DL transmission or UL reception across the entire frequency resources constituting the corresponding cell, and in time resources operating in SBFD and SSFD, the gNB can perform FD operation, performing DL transmission via a first frequency resource (e.g., DL sub-band resource) within the frequency resources constituting the corresponding cell, and simultaneously performing UL reception via a second frequency resource (e.g., UL sub-band resource) within the frequency resources constituting the corresponding cell.

[0304] To this end, the gNB determines / decides time resources corresponding to the first time resource (e.g., HD symbol) and the second time resource (e.g., FD symbol), and transmits configuration information related to the first time resource (e.g., HD symbol) and / or the second time resource (e.g., FD symbol) to the terminal. The FD symbol may include both SBFD symbol and SSFD symbol. More specifically, the gNB determines / decides time resources corresponding to the HD symbol, SBFD symbol, and / or SSFD symbol, and transmits configuration information related to the HD symbol, SBFD symbol, and / or SSFD symbol to the terminal.

[0305] In this case, the DL subband resources and / or UL subband resources may be configured to be different between the time resources operating in SBFD and the time resources operating in SSFD. In the time resources operating in SBFD, the DL subband resources and the UL subband resources may be configured to not overlap with each other. In the time resources operating in SSFD, the DL subband resources and the UL subband resources may be configured to overlap with each other. The DL subband / UL subband resources may be configured as not only some frequency resources but also all frequency resources of the system bandwidth.

[0306] The terminal receives configuration information regarding HD symbols, SBFD symbols, and / or SSFD symbols from the network and determines the positions of the HD symbols, SBFD symbols, and / or SSFD symbols. At this time, the terminal performs DL reception (UL transmission) for the HD symbols via all frequency resources configured for the terminal to perform DL reception (UL transmission), and performs DL reception (UL transmission) for the SBFD symbols and / or SSFD symbols via DL subband (UL subband) resources that are the same as or limited to the frequency resources where the terminal performs DL reception (UL transmission) for the HD symbols. In this case, even if the terminal receives configuration for DL ​​reception (UL transmission) for frequency resources that do not correspond to DL subband resources (UL subband resources) in the SBFD symbol and / or SSFD symbol resources, it does not perform DL reception (UL transmission) for frequency resources that do not correspond to DL subband resources (UL subband resources).

[0307] Specific Examples of the Disclosure

[0308] For the purpose of NES, the base station may perform techniques such as adjusting the on / off status of a UE for a certain duration on the time axis, adjusting transmission / reception resources for UE-common or UE-specific signals / channels, changing the amount of frequency axis resources, adjusting transmission power, or turning on / off antenna ports, TRPs, etc. in the spatial domain. In this disclosure, the listed technologies are referred to as "NES technologies" or "NES_tech," and a state in which at least one of the NES_techs is applied is referred to as an "NES mode" or "NES state." The base station may also inform the terminal of the NES_tech(s) to be applied for each NES_tech or NES_tech group [Approach 1], or may pre-configure the NES_tech or NES_tech group(s) corresponding to the code point of a specific indicator [Approach 2]. Here, the specific indicator can be indicated by DCI or MAC CE, or can be set by higher layer signaling.

[0309] In Approach 1, when at least one NES_tech is applied to a terminal, the corresponding state can be defined as an NES mode or NES state, and can be treated as a different NES mode or different NES state depending on which NES_tech is applied. An NES mode or NES state can mean whether at least one NES technology is applied, or can be used as a concept that indicates which NES technology(ies) are applied. When an NES mode or NES state indicates which NES technology(ies) are applied, different NES modes or different NES states can include different combinations of NES_tech. In Approach 2, for example, when 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, when '1' is indicated through the corresponding indicator, the corresponding state can be defined as an NES mode or NES state. As another example, when a 2-bit indicator is used, '00' indicates that the corresponding NES_tech does not apply, '01' indicates that at least one NES_tech_A applies, '10' indicates that at least one NES_tech_B applies, and '11' indicates that at least one NES_tech_C applies. In this case, if a code point other than '00' is indicated via the indicator, the corresponding state can be defined as an NES mode or NES state. Furthermore, if '01' is confirmed, the terminal can determine that it is in NES state #1, if '10' is confirmed, it is in NES state #2, and if '11' is confirmed, it can determine that it is in NES state #3. This allows the terminal to distinguish whether or not it is in an NES state and / or what type of NES state it is in, depending on the code point.

[0310] For the purpose of NES, the base station may turn on / off certain spatial elements (e.g., antenna ports, active transmit / receive chains, panels, or TRPs) or adjust the power value for a downlink signal / channel. To dynamically apply various NES techniques in the spatial and power domains, the base station may associate CSI-RS resources or resource sets having different antenna ports for one CSI report setting (e.g., CSI-ReportConfig), or may associate 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.).

[0311] Specifically, at least one of the following CSI frameworks can be implemented:

[0312] Framework #1: Multiple CSI-RS resource sets are linked for one channel measurement resource (CMR) or one interference measurement resource (IMR) in the CSI-ReportConfig configuration. 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, CSI-RS resource set #1 and CSI-RS resource set #2 are linked for a CMR, and the CSI-RS resources belonging to CSI-RS resource set #1 can be configured with 16 antenna ports (APs), and the CSI-RS resources belonging to CSI-RS resource set #2 can be configured with 8 antenna ports.

[0313] Framework #2: When one linked CSI-RS resource set is configured for one CMR or one IMR in the CSI-ReportConfig configuration, one or more CSI-RS resource(s) with different attributes, such as the number of APs and / or power offset, are configured within the corresponding CSI-RS resource set. For example, for CSI-RS resource set #1 configured as a CMR, CSI-RS resource #1 belonging to CSI-RS resource set #1 may be configured with 16 APs, and CSI-RS resource #2 belonging to the same set may be configured with 8 APs. For example, for CSI-RS resource set #1 configured as a CMR, CSI-RS resource #1 belonging to CSI-RS resource set #1 may be configured with power offset #1 value, and CSI-RS resource #2 belonging to the same set may be configured with power offset #2 value.

[0314] Framework #3: When a CSI-RS resource set linked to a CMR or an IMR is configured in the CSI-ReportConfig configuration, some or all of the CSI-RS resource(s) in the set can be configured with multiple AP counts and / or power offset values, etc. For example, for CSI-RS resource set #1 configured as a CMR, CSI-RS resource #1 belonging to CSI-RS resource set #1 can be configured with up to 16 APs, and CSI reporting can be configured using at least one of the APs. Alternatively, CSI-RS resource #2 belonging to the same CSI-RS resource set #1 can be configured with multiple power offset values, and CSI reporting can be configured using full or partial power offsets.

[0315] In the above-mentioned CSI framework, the CSI reporting method can be defined through at least one of the following options.

[0316] Option #1: CSI taking into account multiple numbers of APs and / or multiple power offset values ​​configured in one CSI report may all be included in one CSI report. Alternatively, CSI taking into account multiple numbers of APs and / or multiple power offset values ​​configured and / or instructed by the base station may be included in one CSI report. Here, the number of APs and / or power offset value configured and / or instructed by the base station is a part of the number of APs and / or power offset value configured in the corresponding CSI report.

[0317] -Option #2: Even if multiple numbers of APs and / or multiple power offset values ​​are configured in one CSI report, CSI considering a single number of APs and / or a single power offset value can be included in one CSI report through the configuration and / or instruction of the base station.

[0318] Option #3: Even if multiple numbers of APs and / or multiple power offset values ​​are configured in one CSI report, CSI considering some numbers of APs and / or some power offset values ​​can be included in one CSI report through the judgment / decision of the UE. Here, the judgment / decision of the UE can be based on criteria pre-configured or pre-defined by the base station.

[0319] A number L of sub-configurations (greater than one) can be configured in the CSI-ReportConfig, and each sub-configuration can correspond to one spatial or power domain adaptation pattern. Here, the spatial domain adaptation pattern can correspond to a specific number of APs, an AP on / off pattern, or a specific CSI-RS power value. Here, the CSI-RS power value can include a CSI-RS power value determined by a parameter (e.g., powerControlOffsetSS) indicating a power offset value between SSS and CSI-RS. In addition, the spatial domain adaptation pattern corresponds to a CSI-RS power value because turn-off of some antenna elements corresponding to one AP can affect the CSI-RS power value.

[0320] When framework #2 is applied, if CSI-RS index #n1 belonging to a resource set is set to the number of A1 APs or the P1 power value, and CSI-RS index #n2 belonging to the same resource set is set to the number of A2 APs or the P2 power value, then the CSI-RS index #n1 can be configured to be linked to subset index #s1, and the CSI-RS index #n2 can be configured to be linked to subset index #s2. As a result, different spatial domain adaptation patterns can be configured for each subset.

[0321] When framework #3 is applied, if CSI-RS index #n1 belonging to a resource set is set to the number of A1 APs or the P1 / P2 power value, the number of A1 APs or the P1 power value may be linked to subset configuration index #s1, and the number of A2 APs less than A1 corresponding to CSI-RS index #n1 or the P2 power value may be linked to subset configuration index #s2. Thus, different spatial domain adaptation patterns may be configured for each subset. Here, different power domain adaptation patterns may mean different power offset values ​​(e.g., power offset values ​​determined by 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.).

[0322] When framework #2 is applied, if CSI-RS index #n1 belonging to a resource set is set to the P1 power value and CSI-RS index #n2 belonging to the same resource set is set to the P2 power value, the CSI-RS index #n1 can be configured to be linked to subset index #s1 and the CSI-RS index #n2 can be configured to be linked to subset index #s2. As a result, different power domain adaptation patterns can be configured for each subset.

[0323] When Framework #3 is applied, if CSI-RS index #n1 belonging to a resource set is set to the P1 power value and the P2 power value, the P1 power value can be linked to subset index #s1, and the P2 power value can be linked to subset index #s2. As a result, different power domain adaptation patterns can be configured for each subset. The UE can use one of Option #1 / 2 / 3 from among the L subsets to feed back to the base station a CSI report including CSI corresponding to N subsets, where N is between 1 and L.

[0324] A base station may turn on or off certain spatial elements (e.g., APs, active transceiver chains, panels, or TRPs) for the purpose of NES. This may result in an invalid CSI-RS resource, CSI-RS resource set, or SSB index, which may cause problems when a terminal transmits or receives the corresponding TCI or spatial relation information and corresponding DL / UL signals (e.g., CSI-RS, PDCCH, PDSCH, SRS, PUSCH, PUCCH, etc.). For example, if a base station turns on only 16 APs, a CSI-RS resource or CSI-RS resource set configured for 32 APs is invalid.

[0325] Therefore, this disclosure proposes a TCI or spatial correlation information setting that can be generated when a base station turns spatial elements on or off for NES, and a method for transmitting and receiving DL / UL signals (e.g., CSI-RS, PDCCH, PDSCH, SRS, PUSCH, PUCCH, etc.) associated with the setting.

[0326] [Example #1] Mode switching

[0327] Different modes are set depending on the on / off states of spatial elements in the base station, and switching between modes (hereinafter referred to as "mode switching") can be indicated by L1 / L2 signaling (e.g., cell-common DCI, UE group-common DCI, UE-specific DCI, or MAC-CE). That is, multiple modes are defined based on different on / off combinations of spatial elements, and switching between modes can be indicated via signaling. In this disclosure, a mode based on the state of a spatial element may be referred to as a "spatial element mode," "spatial hardware mode," or other terms having equivalent technical meanings. Also, in this disclosure, the spatial element mode may be understood as a concept included in the NES mode or NES state. Specifically, the NES mode is a concept that encompasses control of all factors related to reducing power consumption, and the spatial element mode may be understood as a mode related to reducing power consumption through control of resources in the spatial domain, such as antennas. This embodiment relates to the TCI or spatial correlation information setting according to the corresponding mode switching and / or the transmission / reception method of DL / UL signals (e.g., CSI-RS, PDCCH, PDSCH, SRS, PUSCH, PUCCH, etc.) associated with the corresponding setting.

[0328] 21 illustrates an example of a procedure for switching spatial element modes according to one embodiment of the present disclosure. FIG. 21 illustrates a method performed by a terminal.

[0329] Referring to FIG. 21, in step S2101, the UE checks a mapping relationship for changing a spatial element mode. The spatial element mode is associated with at least one predefined configuration factor. That is, the spatial element mode can be changed by changing the specified configuration factor. Based on the mapping relationship, the UE can determine the spatial element mode as a first mode when checking the configuration factor set in the first information, and can determine the spatial element mode as a second mode when checking the configuration factor set in the second information. The mapping relationship between the spatial element mode and the configuration factor can be predefined or signaled to the UE explicitly or implicitly.

[0330] In step S2103, the UE checks first information mapped to the first mode. The first information associated with the first mode may be embodied in various forms. For example, the first information may be associated with at least one of an NES state, a spatial element, a resource / resource set included in the CSI reporting configuration, a sub-configuration included in the CSI reporting configuration, a TCI, a spatial association information configuration, etc. For example, the spatial element may include at least one of parameters related to an AP, an active transmit / receive chain, a panel, or a TRP, and a specific spatial element mode may be associated with a combination of parameter values. The UE may receive the first information via higher layer signaling, a MAC CE, or a DCI.

[0331] In step S2105, the terminal performs communication in a first mode based on the first information. The first mode specifies spatial elements used by the base station, so the terminal can perform communication based on the spatial elements corresponding to the first mode. Therefore, the terminal can transmit or receive CSI-RS, PDCCH, PDSCH, SRS, PUSCH, PUCCH, etc. based on the setting of TCI or spatial association information corresponding to the first mode.

[0332] In step S2107, the terminal receives second information from the base station, the second information being mapped to the second mode. The second information is a configuration factor similar to the first information and may include a different value from the first information. For example, the terminal may receive the second information via higher layer signaling, MAC CE, or DCI.

[0333] In step S2109, the terminal performs communication in a second mode based on the second information. Because the second mode specifies spatial elements used by the base station, the terminal can perform communication based on the spatial elements corresponding to the second mode. Therefore, the terminal can transmit or receive CSI-RS, PDCCH, PDSCH, SRS, PUSCH, PUCCH, etc. based on the setting of TCI or spatial association information corresponding to the second mode.

[0334] In the embodiment described with reference to Fig. 21, the setting factor associated with the spatial element mode may be defined in various ways. Hereinafter, the present disclosure will describe a specific embodiment for switching the spatial element mode according to the setting factor.

[0335] An NES state or NES mode can be associated with a mode. For example, if NES state #1 and NES state #2 are configured / defined and associated with mode #A and mode #B, respectively, when the base station is configured and / or instructed to operate in NES state #1, the terminal can perform an operation associated with mode #A, and when the base station is configured and / or instructed to operate in NES state #2, the terminal can perform an operation associated with mode #B.

[0336] The on / off state of the base station's spatial elements and / or the power state of the DL signal / channel (e.g., SSB transmit power, NZP-CSI-RS transmit power, power offset between CSI-RS and PDSCH) can be linked to the mode. For example, if the number of active APs (antenna ports) of the base station is greater than or equal to K (e.g., K=16) and less than K (e.g., K=16) and is associated with Mode #A and Mode #B, respectively, when the number of active APs of the base station is configured and / or indicated to be greater than K, the terminal can perform operations associated with Mode #A, and when the number is configured and / or indicated to be less than K, the terminal can perform operations associated with Mode #B. As another example, if the power offset value between the PDSCH and the CSI-RS assumed when the UE feeds back CSI is greater than or equal to X (e.g., X=0) dB and less than X (e.g., X=0) dB, and these values ​​are associated with Mode #A and Mode #B, respectively, when the offset value is set and / or indicated to be greater than or equal to X, the UE may perform an operation associated with Mode #A, and when the offset value is set and / or indicated to be less than X, the UE may perform an operation associated with Mode #B.

[0337] An activated index / group index among the indices of the configured CSI-RS resource / resource set or CSI reporting configuration (e.g., CSI-ReportConfig or CSI-ResourceConfig) may be associated with the mode. For example, if the index(es) of a specific CSI-RS resource / resource set or CSI reporting configuration (e.g., CSI-ReportConfig or CSI-ResourceConfig) and Mode #A are associated, and the index(es) of another specific CSI-RS resource / resource set or CSI reporting configuration (e.g., CSI-ReportConfig or CSI-ResourceConfig) and Mode #B are associated, the index(es) of the CSI-RS resource / resource set or CSI reporting configuration (e.g., CSI-ReportConfig or CSI-ResourceConfig) to be activated is determined based on the configuration and / or instruction of the base station, and the UE can thereby perform operations associated with Mode #A or Mode #B. As another example, indices of CSI-RS resources / resource sets or CSI reporting configurations (e.g., CSI-ReportConfig or CSI-ResourceConfig) may be grouped in advance. If Group #1 and Group #2 are associated with Mode #A and Mode #B, respectively, the UE may perform operations associated with Mode #A or Mode #B depending on which group is configured and / or instructed to be activated.

[0338] A CSI reporting configuration includes L subsets (hereinafter referred to as "sub-cfg"), and by performing CSI reporting including CSI information corresponding to N subsets out of the L subsets, the corresponding N (e.g., 1 to L) subset information may be indicated / triggered / activated via DCI or MAC-CE. At this time, the mode may be changed depending on the indicated / activated / triggered N subset(s). That is, differently combined indicated / activated / triggered subset sets are treated as different modes. For example, when L = 2, the three combinations of {sub-cfg#1, sub-cfg#2}, {sub-cfg#1}, and {sub-cfg#2} are defined as different modes #A, #B, and #C, and the UE may perform operations associated with mode #A, mode #B, or mode #C depending on which combination of subset(s) is indicated / triggered / activated.

[0339] Alternatively, the mode may be defined based on the lowest or highest index value of the indicated / activated / triggered subset(s). For example, when L=2, among the three combinations of {sub-cfg#1, sub-cfg#2}, {sub-cfg#1}, and {sub-cfg#2}, {sub-cfg#1, sub-cfg#2} and {sub-cfg#1} have the same lowest index of 1, so {sub-cfg#1, sub-cfg#2} and {sub-cfg#1} may be defined as Mode #A, and {sub-cfg#2} may be defined as Mode #B.

[0340] Meanwhile, even if L subset indexes are configured, the corresponding mode change method may be applied only to some of the L CSI reporting configurations. That is, the mode change method is not applied to a certain CSI reporting configuration, and therefore, even if the triggered / indicated / activated subset index for the corresponding CSI reporting configuration is changed, the mode is not changed. Whether the mode change method is applicable may be configured for each CSI reporting configuration or may be determined according to a predefined rule (e.g., applying the corresponding method to a CSI reporting configuration linked to a change in the number of APs, applying the corresponding method to a CSI reporting configuration linked to a change in the CSI-RS power value, not applying the corresponding method to a CSI reporting configuration linked to a change in the power offset between CSI-RS and PDSCH, etc.). Depending on which combination of subset(s) is indicated / triggered / activated, the UE may perform an operation associated with Mode #A or Mode #B.

[0341] According to one embodiment, the UE may change the mode according to this scheme only when an NZP-CSI-RS for CMR and / or IMR configured for the CSI reporting configuration is associated. Here, association of an NZP-CSI-RS may mean that the corresponding NZP-CSI-RS is configured as a TCI, QCL, or spatial association reference signal or a path loss reference signal, or that a TCI state, a joint TCI state, a TCI UL state, a joint TCI UL state, or spatial association information is configured for the corresponding NZP-CSI-RS.

[0342] A plurality of modes are defined, and a transmission / reception method for the TCI, spatial correlation information settings described below, and / or DL / UL signals (e.g., CSI-RS, PDCCH, PDSCH, SRS, PUSCH, PUCCH, etc.) associated with the corresponding settings can be determined for each mode. For example, if a TCI configuration method for Mode #A is defined and a TCI configuration method for Mode #B is determined, the terminal can perform an operation associated with Mode #A or Mode #B according to the base station's mode settings and / or instructions.

[0343] In the above-described scheme, the DCI or MAC CE indicating inter-mode switching can be transmitted UE-specific, UE group-common, or cell-specific. The DCI can be scrambled using a network temporary identifier (RNTI) configured to be UE-specific, UE group-common, or cell-specific. The MAC CE can be transmitted via a scheduled PDSCH using the DCI scrambled using an RNTI configured to be UE-specific, UE group-common, or cell-specific. The bit location of the MAC CE used to indicate inter-mode switching can be pre-configured. The carrier / serving cell on which the DCI or MAC CE is transmitted and the carrier / serving cell on which switching is performed may be different, and switching for multiple carriers / serving cells can be indicated via the corresponding DCI or MAC CE. Switching to a common mode can be indicated for multiple carriers / serving cells, or switching to different modes can be indicated for each carrier / serving cell.

[0344] According to one embodiment, switching between modes may be performed according to a predetermined rule / setting without a separate indicator. For example, mode #A may be applied during a specific time period (e.g., DRX on-duration or active time), and mode #B may be applied during other time periods. As another example, mode #A may be applied when operating in a specific BWP within one carrier, and mode #B may be applied when operating in another BWP within the same carrier.

[0345] After a UE performing mode switching receives an instruction for mode switching, if the UE intends to apply a transmission / reception scheme of the associated TCI or spatial association information setting and / or DL / UL signals (e.g., CSI-RS, PDCCH, PDSCH, SRS, PUSCH, PUCCH, etc.) associated with the corresponding setting, an application time is required. Specifically, if the time point at which the UE receives an indicator for mode switching is defined as T1 and the time at which the UE can apply a transmission / reception scheme of the TCI or spatial association information setting and / or DL / UL signals (e.g., CSI-RS, PDCCH, PDSCH, SRS, PUSCH, PUCCH, etc.) associated with the indicated mode is defined as T2, then a minimum value T_mode of T2-T1 capable in the UE can be defined. That is, after the T_mode time from the time when the UE receives an indication for switching between modes, the UE may apply the TCI or spatial association information setting associated with the received mode and / or the transmission / reception method of DL / UL signals (e.g., CSI-RS, PDCCH, PDSCH, SRS, PUSCH, PUCCH, etc.) associated with the corresponding setting. The T_mode value may be defined in absolute time units (e.g., msec, usec, etc.), or in number of slots or symbols. When the T_mode value is defined in number of slots or symbols, the reference SCS may be directly set, or may be defined to be the same as the SCS of the corresponding active BWP, or may be defined to be the SCS of a specific BWP (e.g., initial / default BWP) configured in the corresponding serving cell, or may be defined to be the highest or lowest SCS among the SCSs of the BWPs configured in the corresponding serving cell.

[0346] In addition, the T_mode value can be defined to be the same or different for each DL / UL signal / channel. When different T_mode values ​​are defined for each DL / UL signal / channel, they can be actually applied as defined for each signal / channel. Alternatively, the maximum value of the different T_mode values ​​defined for each signal / channel can be applied to all signals / channels.

[0347] Although the above-described embodiment illustrates switching between two modes, the proposed technology can be easily extended to cases where three or more modes are defined or configured and switching between three or more modes is performed. For example, in the case of a base station operating in a multi-panel, it is efficient to operate through three modes, such as Mode #A (e.g., a state in which only Panel #0 is on), Mode #B (e.g., a state in which only Panel #1 is on), and Mode #C (e.g., a state in which both Panel #0 and Panel #1 are on).

[0348] 22 illustrates an example of a procedure for switching spatial element modes based on time intervals according to one embodiment of the present disclosure. FIG. 22 illustrates a method performed by a terminal.

[0349] Referring to FIG. 22, in step S2201, the terminal checks the mapping relationship between the spatial element mode and the time interval. According to one embodiment, the terminal may receive configuration information indicating the mapping relationship from the base station. For example, the configuration information may be signaled along with information for setting the time interval associated with switching the spatial element mode. According to another embodiment, the mapping relationship may be predefined. According to the configured or predefined mapping relationship, the spatial element mode may be predefined without a separate instruction, or may be switched by changing the time interval based on a predefined rule.

[0350] In step S2203, the terminal performs communication in a first mode during a first time interval. The terminal performs communication based on the first mode during at least a portion of the interval between the start and end of the first time interval. Because the first mode specifies spatial elements used by the base station, the terminal can perform communication based on the spatial elements corresponding to the first mode. Therefore, the terminal can transmit or receive a CSI-RS, PDCCH, PDSCH, SRS, PUSCH, PUCCH, etc. based on the setting of TCI or spatial association information corresponding to the first mode. For example, the terminal can determine a reference RS indicated by the TCI or spatial association information based on the first mode and transmit or receive a signal based on the reference RS.

[0351] In step S2205, the terminal performs communication in the second mode during the second time interval. The terminal performs communication based on the first mode during at least a portion of the interval between the start and end of the second time interval. Because the second mode specifies spatial elements used by the base station, the terminal can perform communication based on the spatial elements corresponding to the second mode. Therefore, the terminal can transmit or receive CSI-RS, PDCCH, PDSCH, SRS, PUSCH, PUCCH, etc. based on the setting of TCI or spatial association information corresponding to the second mode. For example, the terminal can determine a reference RS indicated by the TCI or spatial association information based on the second mode and transmit or receive a signal based on the reference RS.

[0352] As described with reference to FIG. 22 , the spatial element mode may be switched by changing the time interval. Here, the operation state or setting of the UE or the base station may differ between the first and second time intervals that cause the spatial element mode switching. The first and second time intervals may be determined without any instantaneous instruction or signaling according to a predefined rule (e.g., a rule defined based on an event, period, cycle, timer, or other condition). For example, the first and second time intervals may be distinguished by different DRX / DTX operations. Specifically, one of the first and second time intervals is a DRX-on interval or active time interval of the UE or the base station, and the other is not. As another example, the first and second time intervals may be distinguished by duplex mode, and the duplex mode of the UE or the base station may be full duplex (FD) mode or subband FD mode during one of the first and second time intervals, and the other is not.

[0353] When a base station and a terminal perform an HD operation in a first time resource and an FD operation in a second time resource, the antenna configurations for the different time resources may be different. For example, in a period in which an HD operation is performed, all antenna components may be used to perform a transmission or reception operation, and in a period in which an FD operation is performed, some antenna components may be used to perform a transmission operation and the remaining antenna components may be used to perform a reception operation. Since the antenna configuration of the transmitting end differs between the first time resource and the second time resource, spatial element mode switching may be required due to a change in the time interval for the transmission signal. Alternatively, since the antenna configuration of the receiver differs between the first time resource and the second time resource, spatial element mode switching may be required due to a change in the time interval for the transmission signal. In consideration of this, the present invention proposes a spatial element mode switching method depending on a change in the time interval.

[0354] 23 illustrates an example of a procedure for switching spatial element modes based on time intervals according to one embodiment of the present disclosure. FIG. 23 illustrates a method performed by a terminal.

[0355] 23, in step S2301, configuration information related to TCI-related parameters is received. Here, the TCI-related parameters may be understood as one of a TCI state, a TCI UL state, and / or spatial association information. The configuration information includes information related to an index of the TCI-related parameters and information related to a reference RS (e.g., at least one of SSB, CSI-RS, and SRS) corresponding to the index of the TCI-related parameters. In this case, according to one embodiment, multiple reference RSs may be associated with one value of the index of the TCI-related parameters.

[0356] In step S2303, the terminal checks control information including TCI-related parameters. The control information including TCI-related parameters is associated with signal transmission or reception. For example, the terminal may receive DCI, which is control information including TCI-related parameters.

[0357] In step S2305, the UE identifies a reference RS indicated by the TCI-related parameter. The TCI-related parameter is used to indicate the spatial similarity between a configured reference RS and a signal indicated by the control information. In this case, according to one embodiment of the present disclosure, the TCI-related parameter corresponds to a plurality of reference RSs, and the UE can determine which of the plurality of reference RSs is indicated by the TCI-related parameter based on a spatial element mode associated with a time interval. That is, during a first time interval, the index of the TCI-related parameter can be interpreted as indicating a first reference RS, and during a second time interval, the index of the TCI-related parameter can be interpreted as indicating a second reference RS.

[0358] In step S2307, the terminal performs communication based on the reference RS. The terminal can transmit or receive a signal using characteristics of the reference RS that have a QCL relationship with the signal containing the control information. For example, the terminal can transmit or receive a signal configured or scheduled by the control information using the spatial domain filter used to receive the reference RS from the base station.

[0359] [Embodiment 2] When setting the TCI state, TCI UL state, and / or spatial association information, a DL or UL signal that becomes a QCL resource or RS depending on the mode is set, and different QCL resources or RS are applied depending on the activated mode.

[0360] 24 illustrates an example of a procedure for performing communication based on analysis of TCI-related parameters in a spatial element mode according to one embodiment of the present disclosure. FIG. 24 illustrates a method performed by a terminal.

[0361] 24, in step S2401, the terminal determines a spatial element mode. The terminal may explicitly or implicitly determine the spatial element mode. For example, the terminal may determine the spatial element mode based on the value of other settings associated with the spatial element mode.

[0362] In step S2403, the terminal checks control information including TCI-related parameters. Here, the TCI-related parameters can be understood as one of a TCI state, a TCI UL state, and / or spatial association information. The control information including the TCI-related parameters is associated with signal transmission or reception. For example, the terminal can receive DCI, which is control information including the TCI-related parameters.

[0363] In step S2405, the UE identifies a reference RS based on the TCI-related parameters and the spatial element mode. The TCI-related parameters are used to indicate the spatial similarity between the configured reference RS and a signal indicated by the control information. In this case, according to one embodiment of the present disclosure, the TCI-related parameters correspond to multiple reference RSs, and the UE can determine which reference RS among the multiple reference RSs is indicated by the TCI-related parameters based on the spatial element mode.

[0364] In step S2407, the terminal performs communication based on the reference RS. The terminal can transmit or receive a signal using characteristics of the reference RS that have a QCL relationship with the signal containing the control information. For example, the terminal can transmit or receive a signal configured or scheduled by the control information using the spatial domain filter used to receive the reference RS from the base station.

[0365] When the number of APs used by a base station, the type of AP, etc., changes, spatial characteristics such as beam configuration of a terminal may change. By using the above-described method, a reference RS indicated by a TCI-related parameter can be selected based on a spatial element mode, thereby enabling efficient communication. Hereinafter, the present disclosure will describe a specific embodiment of TCI-related parameter analysis according to a spatial element mode.

[0366] Example #2-1: One or two QCL types (e.g., qcl-type1, qcl-type2) can be configured in relation to the TCI-state IE configuration, and one DL RS (e.g., SSB index or NZP CSI-RS resource index) can be configured for each QCL type. According to this embodiment, multiple DL RSs are configured for each of one or two QCL types, and each DL RS can be associated with a different mode. The DL RS activated for each QCL type of the corresponding TCI state can change depending on which mode is activated.

[0367] For example, if qcl-type1 and qcl-type2 are configured in the TCI-State IE, and NZP CSI-RS resource index #1 associated with mode #A and NZP CSI-RS resource index #2 associated with mode #B are configured in qcl-type2, when mode #A is activated by mode switching, NZP CSI-RS resource index #1 is applied to the QCL resource configured in qcl-type2 of the corresponding TCI-State IE, and when mode #B is activated, NZP CSI-RS resource index #2 is applied to the QCL resource configured in qcl-type2 of the corresponding TCI-State IE. As a specific example, when the corresponding TCI-State IE is set to TCI state ID #N and the terminal receives a PDSCH scheduled using the corresponding TCI state ID #N, if mode #A is activated, the QCL resource referenced for receiving the corresponding PDSCH is determined by NZP CSI-RS resource index #1, and if mode #B is activated, the QCL resource referenced for receiving the corresponding PDSCH can be determined by NZP CSI-RS resource index #2.

[0368] Example #2-2: When the TCI-UL-State IE is configured, one DL / UL RS (e.g., SSB index, NZP CSI-RS resource index, or SRS resource index) can be configured in the referenceSignal field. Configuring a DL / UL RS in the referenceSignal field means that the same spatial domain filter used when receiving / transmitting the DL / UL RS configured in the referenceSignal field is used to transmit the UL signal / channel associated with the corresponding TCI-UL-State IE. According to this embodiment, multiple DL / UL RSs can be configured in the referenceSignal field, and each DL / UL RS can be associated with a different mode. The application of the value in the referenceSignal field of the corresponding TCI UL state can change depending on which mode is activated.

[0369] For example, in relation to the TCI-UL-State IE configuration, NZP CSI-RS index #1 associated with Mode #A and NZP CSI-RS index #2 associated with Mode #B can be configured as referenceSignals. In this case, when Mode #A is activated due to mode switching, the referenceSignal configured in the corresponding TCI-UL-State IE can be determined by NZP CSI-RS index #1. Alternatively, when Mode #B is activated, the referenceSignal field value configured in the corresponding TCI-UL-State IE can be determined by NZP CSI-RS index #2. As a specific example, when the corresponding TCI-UL-State IE is set to TCI UL State ID #N and the UE transmits an SRS indicated using the corresponding TCI UL State ID #N, if Mode #A is activated, NZP CSI-RS index #1 may be applied as the value of the referenceSignal field for transmitting the corresponding SRS, and if Mode #B is activated, NZP CSI-RS index #2 may be applied as the value of the referenceSignal field for transmitting the corresponding SRS.

[0370] Example 2-3: In connection with the configuration of an IE related to spatial association (e.g., PUCCH-SpatialRelationInfo related to a PUCCH, SRS-SpatialRelationInfo or SpatialRelationInfo-PDC related to an SRS, etc.), one DL / UL RS (e.g., an SSB index, an NZP CSI-RS resource index, an SRS resource index, or a PRS (positioning RS) index) can be configured in the referenceSignal field. Configuring a DL / UL RS in the referenceSignal field may mean that the same spatial domain filter used for reception / transmission of the DL / UL RS configured in the referenceSignal field is used to transmit an UL signal / channel associated with the corresponding SpatialRelationInfo. According to this embodiment, multiple DL / UL RSs can be configured in the referenceSignal field, and each DL / UL RS can be associated with a different mode. The application of the value of the referenceSignal field of the corresponding SpatialRelationInfo IE can vary depending on which mode is activated.

[0371] For example, if NZP CSI-RS index #1 associated with mode #A and NZP CSI-RS index #2 associated with mode #B are set in the referenceSignal field of the SpatialRelationInfo IE, when mode #A is activated by mode switching, NZP CSI-RS index #1 is applied as the value of the referenceSignal field set in the corresponding SpatialRelationInfo IE, and when mode #B is activated, NZP CSI-RS index #2 is applied as the value of the referenceSignal field set in the corresponding SpatialRelationInfo IE. When the corresponding SpatialRelationInfo IE is set to SpatialRelationInfo ID#N and the terminal transmits a PUCCH for which the corresponding SpatialRelationInfo ID#N is set and / or indicated, if mode #A is activated, NZP CSI-RS index #1 is applied as the referenceSignal field value for the corresponding PUCCH transmission, and if mode #B is activated, NZP CSI-RS index #2 can be applied as the referenceSignal field value for the corresponding PUCCH transmission.

[0372] Example #2-4: In relation to the TCI-State IE or TCI-UL-State IE configuration, one DL RS (e.g., SSB index or NZP CSI-RS resource index) can be configured in the pathlossReferenceRS field. Configuring a DL RS in the pathlossReferenceRS field may mean determining the transmit power of an UL signal / channel based on path-loss estimation performed based on the corresponding DL RS. According to this embodiment, multiple DL RSs can be configured in the pathlossReferenceRS field, and each DL RS can be associated with a different mode. Depending on which mode is activated, different values ​​can be applied to the pathlossReferenceRS field of the corresponding TCI state or TCI UL state.

[0373] For example, if NZP CSI-RS index #1 associated with mode #A and NZP CSI-RS index #2 associated with mode #B are set in the pathlossReferenceRS field in the TCI-State IE or TCI-UL-State IE, when mode #A is activated due to mode switching, NZP CSI-RS index #1 is applied as the value of the pathlossReferenceRS field set in the corresponding TCI-State IE or TCI-UL-State IE, and when mode #B is activated, NZP CSI-RS index #2 is applied as the value of the pathlossReferenceRS field set in the corresponding TCI-State IE or TCI-UL-State IE.

[0374] [Example #3] Different sets of TCI states, TCI UL states, or spatial association information are set depending on the mode, and different sets are applied depending on the activated mode.

[0375] 25 illustrates an example of a procedure in which a terminal performs communication based on a set of TCI-related parameters in a spatial element mode according to one embodiment of the present disclosure. FIG. 25 illustrates a method performed by a terminal.

[0376] 25, in step S2501, the terminal determines a spatial element mode. The terminal may explicitly or implicitly determine the spatial element mode. For example, the terminal may determine the spatial element mode based on the value of other settings associated with the spatial element mode.

[0377] In step S2503, the terminal checks control information including TCI-related parameters. Here, the TCI-related parameters can be understood as one of a TCI state, a TCI UL state, and / or spatial association information. The control information including the TCI-related parameters is associated with signal transmission or reception. For example, the terminal can receive DCI, which is control information including the TCI-related parameters.

[0378] In step S2505, the terminal determines a list of TCI-related parameters based on the spatial element mode. Specifically, multiple TCI-related parameter lists for the same application are configured in the terminal, and the terminal can check one TCI-related parameter list corresponding to the spatial element mode. In this case, the mapping relationship between the spatial element mode and the TCI-related parameter list can be determined according to a predefined rule or can be instructed by the base station.

[0379] In step S2507, the terminal identifies a reference RS in the determined list based on the TCI-related parameters. The TCI-related parameters are used to indicate the spatial similarity between the configured reference RS and the signal indicated by the control information. Therefore, the terminal identifies the reference RS indicated by the codepoint of the TCI-related parameters in the determined list. That is, the terminal can select a list of TCI-related parameters based on the spatial element mode and interpret the codepoint differently depending on the selected list.

[0380] In step S2509, the terminal performs communication based on the reference RS. The terminal can transmit or receive a signal using characteristics of the reference RS that have a QCL relationship with the signal containing the control information. For example, the terminal can transmit or receive a signal configured or scheduled by the control information using the spatial domain filter used to receive the reference RS from the base station.

[0381] The situation in which a mapping relationship between the spatial element mode and the list of TCI-related parameters is formed has been described with reference to Figure 25. However, the spatial element mode can be extended to methods using other parameters. Thus, the spatial element mode can correspond to the list of spatial association information indexes, and the spatial element mode can correspond to a method of analyzing code points in a CSI request field or candidates for TCI-related parameters. Hereinafter, the present disclosure will describe a specific example of selecting a list of TCI-related parameters according to the spatial element mode.

[0382] Example 3-1: Multiple TCI-related parameters can be managed and / or configured as one list. For example, the tci-StatesPDCCH-ToAddList field is a list of TCI state indices that can be applied to a non-zero CORESET, the tci-StatesToAddModList field is a list of TCI state indices that can be applied to PDSCH and CORESET index 0, the dl-OrJointTCI-StateToAddModList field is a list of TCI state indices that can be applied to DL / UL signals / channels, the ul-TCI-ToAddModList field is a list of TCI UL state indices that can be applied to UL signals / channels, and the spatialRelationInfoToAddModList field is a list of spatial relationship information indices that can be applied to UL signals / channels. According to this embodiment, multiple lists can be configured, and each list can be associated with a different mode. The activated list may change depending on which mode is activated, and the index of the TCI-related parameters is determined based on the activated list, and the determined index can be applied to the corresponding DL / UL signal / channel. The listed lists can be commonly applied / extended, and the case of the tci-StatesToAddModList field is exemplified as follows.

[0383] For example, in relation to the setting of the tci-StatesToAddModList field, a tci-StatesToAddModList index #1 associated with mode #A and a tci-StatesToAddModList index #2 associated with mode #B are set in the tci-StatesToAddModList field, and TCI state indexes #1 / 2 / 3 can be mapped to each of the 3-bit code points in the TCI field of DCI format 1_1. In this case, when mode #A is activated by mode switching, TCI state indexes #1 / 2 / 3 set in tci-StatesToAddModList index #1 can be mapped to each TCI field, and when mode #B is activated, TCI state indexes #1 / 2 / 3 set in tci-StatesToAddModList index #2 can be mapped to each TCI field.

[0384] Similarly, tci-StatesToAddModList index #1 and TCI states #1 / 2 / 3 can be mapped, and tci-StatesToAddModList index #2 and TCI states #2 / 4 / 6 can be mapped. In this case, when mode #A is activated by mode switching, TCI state indexes #1 / 2 / 3 set in tci-StatesToAddModList index #1 can be mapped to each TCI field, and when mode #B is activated, TCI state indexes #2 / 4 / 6 set in tci-StatesToAddModList index #2 can be mapped to each TCI field.

[0385] As another example, in relation to the spatialRelationInfoToAddModList setting, a spatialRelationInfoToAddModList index #1 associated with Mode #A and a spatialRelationInfoToAddModList index #2 associated with Mode #B may be set in the spatialRelationInfoToAddModList field, and a spatial relationship information index #k may be linked to a specific PUCCH resource index #n. In this case, when Mode #A is activated due to mode switching, the spatial relationship information index #k set in the spatialRelationInfoToAddModList index #1 may be linked to the corresponding PUCCH resource index #n, and when Mode #B is activated, the spatial relationship information index #k set in the spatialRelationInfoToAddModList index #2 may be linked to the corresponding PUCCH resource index #n.

[0386] Similarly, with regard to the spatialRelationInfoToAddModList setting, spatial relationship information index #k1 may be linked to spatialRelationInfoToAddModList index #1 associated with mode #A, and spatial relationship information index #k2 may be linked to spatialRelationInfoToAddModList index #2 associated with mode #B. In this case, when mode #A is activated due to mode switching, spatial relationship information index #k1 set in spatialRelationInfoToAddModList index #1 may be linked to a corresponding PUCCH resource index #n, and when mode #B is activated, spatial relationship information index #k2 set in spatialRelationInfoToAddModList index #2 may be linked to a corresponding PUCCH resource index #n.

[0387] Example #3-1-1: In the case of aperiodic CSI (AP-CSI) reporting, the UE can feed back values ​​such as CQI / PMI / RI measured using the CSI-RS set by the CSI-AperiodicTriggerStateList parameter, which corresponds to the codepoint indicated in the CSI request field in the UL grant for scheduling the PUSCH, via the scheduled PUSCH. According to this embodiment, multiple lists are set in the AperiodicTriggerStateList field, and the lists can be associated with different modes. The activated list can change depending on which mode is activated, and it can be understood that the codepoint of the CSI request field in the UL grant varies based on the activated list.

[0388] For example, in relation to the AperiodicTriggerStateList field configuration, an AperiodicTriggerStateList index #1 associated with Mode #A and an AperiodicTriggerStateList index #2 associated with Mode #B can be configured as tci-StatesToAddModList. In this case, when Mode #A is activated due to mode switching, each of the CSI-AperiodicTriggerState(s) configured in AperiodicTriggerStateList index #1 can be mapped to a codepoint in the CSI request field in the UL grant, and when Mode #B is activated, each of the CSI-AperiodicTriggerState(s) configured in AperiodicTriggerStateList index #2 can be mapped to a codepoint in the CSI request field in the UL grant.

[0389] Example #3-2: Candidates for multiple TCI-related parameters (e.g., TCI state, TCI UL state, spatial association information, or DL / UL RS) are pre-configured and / or indicated, and different candidates can be applied depending on the activated mode.

[0390] In connection with the corresponding CORESET configuration for the PDCCH, at least one TCI state index linked to each mode can be configured and / or indicated via RRC signaling and / or MAC CE, and the UE can apply at least one TCI state index that differs depending on the activated mode to receive the corresponding PDCCH. When the ControlResourceSet IE is configured, one or more TCI state indexes can be linked for each mode.

[0391] For example, if TCI state index #0 is linked to mode #A and TCI state index #1 is linked to mode #B, then for PDCCH reception in the corresponding CORESET resource, TCI state index #0 is applied when mode #A is activated, and TCI state index #1 is applied when mode #B is activated. As another example, if TCI state indexes {#0, #1, #2} are linked in the ControlResourceSet IE configuration, and it is indicated via one or each mode-specific MAC CE that TCI state index #0 is linked to mode #A and that TCI state index #1 is linked to mode #B, then for PDCCH reception in the corresponding CORESET resource, TCI state index #0 is applied when mode #A is activated, and TCI state index #1 is applied when mode #B is activated.

[0392] In the case of PUCCH, a mode-specific linked PUCCH-SpatialRelationInfo index can be set and / or indicated via RRC signaling and / or MAC CE, and the terminal can apply different PUCCH-SpatialRelationInfo indexes depending on the activated mode to transmit the corresponding PUCCH.

[0393] For example, if PUCCH-SpatialRelationInfo index #0 is linked to mode #A and PUCCH-SpatialRelationInfo index #1 is linked to mode #B, for PUCCH transmission in the corresponding BWP, when mode #A is activated, PUCCH-SpatialRelationInfo index #0 is applied, and when mode #B is activated, PUCCH-SpatialRelationInfo index #1 is applied. As another example, if PUCCH-SpatialRelationInfo indexes {#0, #1, #2} are linked in the PUCCH-Config setting, and for one PUCCH resource #n, it is indicated via one or each mode-specific MAC CE that PUCCH-SpatialRelationInfo index #0 is linked to mode #A and that PUCCH-SpatialRelationInfo index #1 is linked to mode #B, then when mode #A is activated for transmitting the corresponding PUCCH resource #n, PUCCH-SpatialRelationInfo index #0 can be applied, and when mode #B is activated, PUCCH-SpatialRelationInfo index #1 can be applied.

[0394] In the case of a PDSCH, a mode-dependent TCI state index may be configured and / or indicated via RRC signaling and / or MAC CE, and the UE may apply different TCI state indexes depending on the activated mode to receive the corresponding PDSCH. For example, a TCI state index corresponding to each code point of a field indicating a TCI in a DCI format may be configured and / or indicated differently for each mode. Specifically, if TCI state indexes {#0, #2, #4} associated with mode #A are mapped to the respective code points and TCI state indexes {#1, #3, #5} associated with mode #B are mapped to the respective code points, when analyzing the TCI field in the corresponding DCI format, it may be assumed that when mode #A is activated, the TCI state indexes {#0, #2, #4} are mapped to the respective code points, and when mode #B is activated, the TCI state indexes {#1, #3, #5} are mapped to the respective code points. The mapping relationship between the corresponding code point and the TCI state index can be indicated via one or each mode-specific MAC CE.

[0395] In the case of a unified TCI state, a mode-specific interlocked TCI state index may be configured and / or indicated via RRC signaling and / or MAC CE, and the UE may apply different TCI state indexes depending on the activated mode to receive / transmit interlocked DL / UL signals. For example, a TCI state index corresponding to each codepoint in a field indicating a TCI in a DCI format may be configured and / or indicated differently for each mode. Specifically, if each of the TCI state indexes {#0, #2, #4} for mode #A is mapped to each of the codepoints and each of the TCI state indexes {#1, #3, #5} for mode #B is mapped to each of the codepoints, when analyzing the TCI field in the corresponding DCI format, it may be assumed that the TCI state indexes {#0, #2, #4} are mapped to the codepoints when mode #A is activated, and that the TCI state indexes {#1, #3, #5} are mapped to the codepoints when mode #B is activated. The mapping relationship between the corresponding code point and the TCI state index can be indicated via a single or mode-specific MAC CE (e.g., activation / deactivation MAC CE of the integrated TCI state).

[0396] In the case of DL / UL signals (e.g., CSI-RS, SRS), a mode-linked TCI state index, NZP CSI-RS resource index, or TCI UL state index may be configured and / or indicated via RRC signaling and / or MAC CE, and the UE may apply a different TCI state index, NZP CSI-RS resource index, or TCI UL state index according to the TCI UL state of the activated mode to receive / transmit the corresponding DL / UL signal. For example, the TCI state index corresponding to qcl-InfoPeriodicCSI-RS in the NZP-CSI-RS-Resource IE configuration may be configured and / or indicated differently for each mode. Specifically, if TCI state index #0 is configured and / or indicated for mode #A and TCI state index #1 is configured and / or indicated for mode #B, when mode #A is activated, TCI state index #0 may be applied as QCL information, and when mode #B is activated, TCI state index #1 may be applied as QCL information. As another example, the NZP CSI-RS resource index corresponding to associatedCSI-RS in the SRS-ResourceSet IE configuration may be configured and / or indicated differently for each mode. Specifically, if NZP CSI-RS resource index #0 is configured and / or indicated for Mode #A and NZP CSI-RS resource index #1 is configured and / or indicated for Mode #B, NZP CSI-RS resource index #0 may be applied as associatedRS information when Mode #A is activated, and NZP CSI-RS resource index #1 may be applied as associatedRS information when Mode #B is activated. As another example, the TCI state or TCI UL state index corresponding to srs-TCIState in the SRS-Resource IE configuration may be configured and / or indicated differently for each mode.Specifically, if TCI(UL) state index #0 is set and / or indicated for mode #A and TCI(UL) state index #1 is set and / or indicated for mode #B, when mode #A is activated, TCI(UL) state index #0 is applied, and when mode #B is activated, TCI(UL) state index #1 is applied.

[0397] In pathloss reference RS or MPE-resource configuration for a channel (e.g., PUCCH, PUSCH, etc.), mode-specific linked SSB indices or NZP CSI-RS resource indices can be configured and / or indicated via RRC signaling and / or MAC CE. In this case, the UE can apply different SSB indices or NZP CSI-RS resource indices depending on the activated mode to transmit the corresponding UL signal.

[0398] In RMTC (e.g., RMTC-Config) configuration, mode-specific linked TCI state indexes can be configured via RRC signaling. In this case, the UE can apply different TCI state indexes according to the activated mode to perform corresponding received signal strength indicator (RSSI) measurements.

[0399] In CG PUSCH configuration (e.g., Type 1 CG PUSCH activated only by RRC configuration), a mode-linked SRS resource index (e.g., srs-ResourceIndicator) can be configured via RRC signaling. In this case, the UE can apply different SRS resource indexes depending on the activated mode to perform corresponding CG PUSCH transmission.

[0400] When analyzing an SRS resource indicator field in a DCI for triggering SRS and / or a DCI for scheduling a PUSCH, the UE may analyze the corresponding field by applying different SRS resource set indexes depending on the activated mode. For example, if SRS resource set index #0 is linked to mode #A and SRS resource set index #1 is linked to mode #B, when the UE analyzes the codepoint of the SRS resource indicator field in the DCI for triggering SRS and / or a DCI for scheduling a PUSCH, the codepoint of the SRS resource indicator field may be understood based on SRS resource set index #0 when mode #A is activated and based on SRS resource set index #1 when mode #B is activated.

[0401] [Embodiment #4] Resource sets for separate DL / UL signals / channels (e.g., CORESET, PUCCH) are pre-configured depending on the mode, and different DL / UL signals / channels are received / transmitted depending on the activated mode.

[0402] 26 illustrates an example of a procedure in which a terminal selects radio resources based on spatial element modes according to one embodiment of the present disclosure. FIG. 26 illustrates a method performed by a terminal.

[0403] 26, in step S2601, the terminal determines the spatial element mode. The terminal may explicitly or implicitly determine the spatial element mode. For example, the terminal may determine the spatial element mode based on the value of other settings associated with the spatial element mode.

[0404] In step S2603, the terminal determines a radio resource based on the spatial element mode. The terminal can select a radio resource based on a mapping relationship between the spatial element mode and the radio resource. At this time, although not shown in FIG. 26, the terminal can determine the radio resource after receiving information on the configuration or use of the radio resource.

[0405] In step S2605, the terminal performs communication using the determined radio resource, i.e., the terminal can transmit or receive a signal using the determined radio resource.

[0406] As described with reference to Figure 26, the radio resource for a given signal or channel may vary depending on the spatial element mode. Hereinafter, the present disclosure will describe a specific example of selecting the radio resource depending on the spatial element mode.

[0407] Example #4-1: When CORESET index 1 is associated with mode #A and CORESET index 2 is associated with mode #B, the UE may perform PDCCH monitoring according to the activated mode. Specifically, when mode #A is activated, the UE performs PDCCH monitoring corresponding to CORESET index 1 and does not perform PDCCH monitoring corresponding to CORESET index 2. On the other hand, when mode #B is activated, the UE performs PDCCH monitoring corresponding to CORESET index 2 and does not perform PDCCH monitoring corresponding to CORESET index 1. As shown in Table 1 below, when multiple CORESETs having different QCL types D are received at a specific PDCCH monitoring occasion, the UE performs PDCCH monitoring on some CORESETs according to a predetermined priority defined in the standard and does not perform PDCCH monitoring on the remaining CORESETs. In this case, the UE may perform PDCCH monitoring only for the CORESET(s) associated with the activated mode according to the priority rule defined in Table 13 below. The following Table 13 is an excerpt from Section 10.1 of TS 38.223 v17.5.0.

[0408] [Table 13]

[0409] Example #4-2: A first PUCCH resource / resource set associated with Mode #A and a second PUCCH resource / resource set associated with Mode #B can be configured separately. In this case, the terminal can transmit UCI via the first PUCCH resource when Mode #A is activated, and can transmit UCI via the second PUCCH resource when Mode #B is activated.

[0410] [Example #5] When a reference signal (e.g., SSB, CSI-RS, or SRS) linked to a DL / UL signal / channel or TCI state is invalid due to activation of a specific mode, reception / transmission scheme for the corresponding DL / UL signal / channel or DL / UL signal / channel linked to the corresponding TCI state

[0411] If a base station turns on / off certain spatial elements as it enters the NES mode, invalid reference signals or TCI states may occur.

[0412] Example #5-1: Reception / transmission for DL / UL signals / channels associated with invalid SSB, CSI-RS, SRS, or a TCI state or TCI UL state index associated with at least one of these is not performed. Alternatively, the terminal ignores or does not expect a reception / transmission instruction from the base station for the corresponding DL / UL signals / channels. Alternatively, when a TCI state or TCI UL state index(es) corresponding to mode #A is pre-configured / indicated and a TCI state or TCI UL state index(es) corresponding to mode #B is pre-configured / indicated, if a TCI state or TCI UL state index(es) corresponding to mode #B (or mode #A) is pre-configured / indicated for a DL / UL signal / channel received or transmitted in mode #A (or mode #B) status, the terminal does not perform transmission / reception for the corresponding DL / UL signals / channels, or ignores or does not expect a reception / transmission instruction from the base station.

[0413] Example #5-2: Reception / transmission of DL / UL signals / channels linked to invalid SSB, CSI-RS, SRS, or TCI states or TCI UL state indexes linked to at least one of these can be performed based on predetermined rules.

[0414] For example, when a TCI state index #n is indicated for a specific PDSCH reception, if the DL RS, which is a QCL resource associated with the corresponding TCI state index #n, becomes inactive, reception / transmission of the DL / UL signal / channel may be performed as follows: The reception / transmission of the DL / UL signal / channel may be performed according to the TCI state of the PDCCH in which the DCI scheduling the corresponding PDSCH is found. Alternatively, the reception / transmission of the DL / UL signal / channel may be performed according to a pre-configured / defined default TCI state. Alternatively, the reception / transmission of the DL / UL signal / channel may be performed according to the TCI state corresponding to the smallest or highest CORESET index received immediately before the PDSCH or the DCI scheduling the corresponding PDSCH. Alternatively, the reception / transmission of the DL / UL signal / channel may be performed according to the TCI state corresponding to the smallest or highest CORESET index of the latest CORESETs associated with the activated mode.

[0415] As another example, for periodic or semi-persistent DL / UL signals / channels (e.g., P / SP-CSI-RS, P / SP-SRS, P / SP PRS (positioning RS), periodic PUCCH, SP-CSI on PUSCH / PUCCH, SPS PDSCH, CG PUSCH, etc.), if the linked DL / UL RS or TCI (UL) state becomes invalid, Opt1) reception / transmission of the DL / UL signals / channels may be suspended and restored again when they become valid, or Opt2) reception / transmission of the DL / UL signals / channels may be considered released.

[0416] Example #5-3: In connection with reception of a repeatedly transmitted DL / UL signal / channel (e.g., PDCCH, PDSCH, PUSCH, PUCCH, CSI-RS, SRS, etc.) linked with an invalid SSB, CSI-RS, SRS, or a TCI state or TCI UL state index linked to at least one of them, if the linked DL / UL RS or TCI(UL) state becomes invalid during the repetition, or if the linked DL / UL RS or TCI(UL) state is changed, or if mode switching occurs, the repeatedly transmitted DL / UL signal / channel can be processed as follows: OptA) Repetition can be stopped. OptB) Repetition can continue to be performed according to a predetermined rule. OptC) Repetition can continue to be performed in the same way as before a specific mode was activated. OptD) Repetition can be performed based on the DL / UL RS or TCI(UL) state linked to the changed mode. OptE) Repeat transmission can be omitted only when the DL / UL RS or TCI(UL) state associated with the repeated transmission DL / UL signal / channel is not valid, and when valid, repeat transmission can be performed as configured / instructed. In this method, when multiple PDSCHs / PUSCHs carrying different transmission blocks are scheduled via one DCI, the above-described OptA / B / C / D / E can be extended to each PDSCH / PUSCH. When a TCI state or TCI UL state index(es) corresponding to Mode #A is configured / instructed in advance and a TCI state or TCI UL state index(es) corresponding to Mode #B is configured / instructed in advance for a DL / UL signal / channel received or transmitted in Mode #A (or Mode #B) status, this can be defined as a "state in which the TCI(UL) state is not valid" above.

[0417] Example #5-4: When performing RSSI measurement linked to a TCI state, if the linked TCI(UL) state becomes invalid or if the linked DL / UL RS or TCI(UL) state is changed, the measurement can be performed as follows. OptA) Measurement can be performed so that the TCI state is not set. In this case, the TCI state assumed by the terminal during RSSI measurement can depend on the terminal implementation. OptB) Measurement can be performed by applying a predetermined default TCI state. OptC) Measurement can be performed in the same manner as before a specific mode is activated. OptD) After initializing filtering for L3 measurement, measurement can be performed based on the TCI(UL) state linked to the changed mode. OptE) Only if the DL / UL RS or TCI(UL) state linked to the RSSI measurement is invalid, the corresponding RSSI measurement can be omitted, and if valid, the RSSI measurement can be performed as configured / instructed. When a TCI state or TCI UL state index(es) corresponding to mode #A is set / indicated in advance and a TCI state or TCI UL state index(es) corresponding to mode #B is set / indicated in advance, the case where a TCI state or TCI UL state index(es) corresponding to mode #B (or mode #A) is set / indicated for a DL / UL signal / channel received or transmitted in a mode #A (or mode #B) situation can be defined as a "state in which the TCI (UL) state is not valid" in the above.

[0418] Among the methods proposed in the present disclosure, in the case of a method applied to a PDSCH or a PUSCH, if a DL / UL RS, which is a QCL resource assumed when receiving or transmitting a DM-RS of a PDSCH or a PUSCH, is changed, the DL / UL RS, which is a QCL resource, can also be changed when receiving or transmitting the corresponding DM-RS and an associated PT-RS (phase tracking reference signal).

[0419] 27 illustrates an example of a procedure for changing modes based on a mode switching indication according to one embodiment of the present disclosure. 27 illustrates a signal exchange between a terminal 2710 and a base station 2720.

[0420] 27, in step S2701, a base station 2720 configures a TCI state for a terminal 2710, taking into consideration the spatial element mode. Specifically, when configuring one TCI state, the base station may configure different CSI-RS resource indexes for each mode. For example, CSI-RS resource index #1 may be configured as DL RS, which is a QCL resource for mode #A, and CSI-RS resource index #2 may be configured as DL RS, which is a QCL resource for mode #B.

[0421] In step S2703, base station 2720 transmits a mode switching indicator to terminal 2710. The mode switching indicator indicates switching from mode #A to mode #B. As a result, in step S2705, terminal 2710 that receives the mode switching indicator can apply TCI based on the activated mode. For example, terminal 2710 can perform mode switching to mode #B and receive PDSCH scheduled with TCI state index #N by applying CSI-RS resource index #2 as the QCl resource.

[0422] In step S2707, base station 2720 transmits a mode switching indicator to terminal 2710. The mode switching indicator indicates switching from mode #B to mode #A. As a result, in step S2709, terminal 2710 that has received the mode switching indicator can apply TCI based on the activated mode. For example, terminal 2710 can perform mode switching to mode #A and receive PDSCH scheduled with TCI state index #N by applying CSI-RS resource index #1 as the QCl resource.

[0423] As described with reference to FIG. 27, the UE may analyze and apply the TCI state index, i.e., the reference RS indicated by the TCI state index, differently depending on the spatial element mode switching. Here, the TCI state may be replaced by the TCI UL state or spatial association information. In another embodiment, signaling indicating mode switching may be omitted, and mode switching may be performed according to a predefined rule. For example, mode switching may be performed by changing the time interval. For example, the time interval may be associated with DRX / DTX operation or duplex mode.

[0424] As described above, the present disclosure proposes a technique for setting TCI and transmitting / receiving DL / UL signals associated with the corresponding setting, in contrast to a base station turning on / off antennas or adjusting power values, whereby the base station can dynamically turn off some antennas or perform energy saving operations such as reducing power values, thereby reducing base station power consumption.

[0425] The proposed methods described above can be implemented independently, or can be implemented in a combined (or merged) form of some of the proposed methods. Rules can be defined so that the base station notifies the terminal of the applicability information of the proposed method (or information on the rules of the proposed method) via a predefined signal (e.g., physical layer signal or upper layer signal).

[0426] The present disclosure may be embodied in other specific forms without departing from the technical ideas and essential features described in the present disclosure. Therefore, the above detailed description should not be interpreted as limiting in all respects, but should be considered as illustrative. The scope of the present disclosure should be determined by reasonable interpretation of the appended claims, and all modifications within the scope of equivalence of the present disclosure are included in the scope of the present disclosure. In addition, claims that do not have an explicit reference relationship in the claims may be combined to form embodiments, or may be included as new claims by amendment after filing.

[0427] [Industrial Applicability] The embodiments of the present disclosure can be applied to various wireless access systems, such as the 3GPP (3rd Generation Partnership Project) or 3GPP2 system.

[0428] The embodiments of the present disclosure may be applied not only to the various wireless access systems but also to all technical fields to which the various wireless access systems are applied. Furthermore, the proposed method may also be applied to mmWave and THz communication systems using ultra-high frequency bands.

[0429] Additionally, embodiments of the present disclosure may be applied to a variety of applications, such as autonomous vehicles, drones, etc.

[0430] [Claims at the time of international application] [Claim 1] 1. A method performed by a terminal in a wireless communication system, comprising: receiving configuration information for setting TCI (transmission configuration indication) related parameters; receiving control information including the TCI-related parameters; identifying a reference signal (RS) indicated by the TCI-related parameters; transmitting or receiving a signal related to the control information based on the reference RS; A method in which the configuration information indicates, for one value of the TCI-related parameter, a first reference RS or a first radio resource to be applied to a first time interval, and indicates a second reference RS or a second radio resource to be applied to a second time interval. [Claim 2] The step of transmitting or receiving a signal includes: During the first time interval, transmitting or receiving the signal by applying the first reference RS as a quasi co-located resource (QCL); and The method of claim 1 , comprising: transmitting or receiving the signal by applying the second reference RS as a quasi co-located resource (QCL) during the second time interval. [Claim 3] The first time period corresponds to a first mode among spatial element modes distinguished by an on / off state of spatial elements of a base station; The method of claim 1 , wherein the second time interval corresponds to a second one of the spatial element modes. [Claim 4] The method of claim 3, wherein the configuration information configures a first RS resource index applied upon activation of the first mode and a second RS resource index applied upon activation of the second mode as one QCL resource. [Claim 5] The setting information includes a qcl-type1 field and a qcl-type2 field, The method of claim 4 , wherein the first RS resource index and the second RS resource index are set as values ​​of the qcl-type2 field. [Claim 6] The setting information includes a referenceSignal field, The method of claim 4 , wherein the first RS resource index and the second RS resource index are set as values ​​of the referenceSignal field. [Claim 7] The setting information includes a pathlossReferenceRS field, The method of claim 4 , wherein the first RS resource index and the second RS resource index are set as values ​​of the pathlossReferenceRS field. [Claim 8] 4. The method of claim 3, wherein the configuration information configures a first list of multiple TCI-related parameters to be applied upon activation of the first mode and a second RS list to be applied upon activation of the second mode. [Claim 9] the first list includes TCI-related parameters having indices belonging to a first set of indices; the second list includes TCI-related parameters having indices belonging to a second set of indices; The method of claim 8 , wherein at least one index belonging to the first set of indexes is not included in the second set of indexes. [Claim 10] 4. The method according to claim 3, wherein the configuration information configures, for one resource region or channel, a first radio resource to be applied upon activation of the first mode and a second radio resource to be applied upon activation of the second mode. [Claim 11] The method of claim 10, wherein the resource region includes a control resource set (CORESET) or a PUCCH. [Claim 12] A terminal in a wireless communication system, a transceiver, and a processor coupled to the transceiver; The processor: Receive configuration information for setting TCI (transmission configuration indication) related parameters; receiving control information including the TCI-related parameters; Identifying a reference signal (RS) indicated by the TCI-related parameters; transmit or receive a signal related to the control information based on the reference RS; The configuration information indicates a first reference RS or a first radio resource to be applied to a first time interval, and a second reference RS or a second radio resource to be applied to a second time interval, for one value of the TCI-related parameter. [Claim 13] A communication device, at least one processor, at least one computer memory coupled to the at least one processor and storing instructions that direct operations when executed by the at least one processor; The operation is receiving configuration information for setting TCI (transmission configuration indication) related parameters; receiving control information including the TCI-related parameters; identifying a reference signal (RS) indicated by the TCI-related parameters; transmitting or receiving a signal related to the control information based on the reference RS; A communication device, wherein the configuration information indicates, for one value of the TCI-related parameter, a first reference RS or a first radio resource to be applied to a first time interval, and indicates a second reference RS or a second radio resource to be applied to a second time interval. [Claim 14] A non-transitory computer-readable medium storing at least one instruction, The at least one instruction executable by a processor, the at least one instruction causes the device to execute; The processor: Receive configuration information for setting TCI (transmission configuration indication) related parameters; receiving control information including the TCI-related parameters; Identifying a reference signal (RS) indicated by the TCI-related parameters; transmit or receive a signal related to the control information based on the reference RS; A computer-readable medium, wherein the configuration information indicates a first reference RS or a first radio resource to be applied in a first time interval and a second reference RS or a second radio resource to be applied in a second time interval for one value of the TCI-related parameter.

Claims

1. 1. A method performed by a terminal in a wireless communication system, comprising: receiving configuration information for configuring transmission configuration indication (TCI)-related parameters; receiving control information including the TCI-related parameters; Identifying a reference signal (RS) indicated by the TCI-related parameters; transmitting or receiving a signal related to the control information based on the reference RS; A method in which the configuration information indicates, for one value of the TCI-related parameter, a first reference RS or a first radio resource to be applied to a first time interval, and indicates a second reference RS or a second radio resource to be applied to a second time interval.

2. The step of transmitting or receiving a signal includes: Transmitting or receiving the signal by applying the first reference RS as a quasi co-located resource (QCL) during the first time interval; and The method of claim 1 , comprising: transmitting or receiving the signal by applying the second reference RS as a quasi co-located resource (QCL) during the second time interval.

3. The first time period corresponds to a first mode among spatial element modes distinguished by an on / off state of spatial elements of a base station; The method of claim 1 , wherein the second time interval corresponds to a second one of the spatial element modes.

4. The method of claim 3, wherein the configuration information configures a first RS resource index applied upon activation of the first mode and a second RS resource index applied upon activation of the second mode as one QCL resource.

5. The setting information includes a qcl-type1 field and a qcl-type2 field, The method of claim 4 , wherein the first RS resource index and the second RS resource index are set as values ​​of the qcl-type2 field.

6. The setting information includes a referenceSignal field, The method of claim 4 , wherein the first RS resource index and the second RS resource index are set as values ​​of the referenceSignal field.

7. The setting information includes a pathlossReferenceRS field, The method of claim 4 , wherein the first RS resource index and the second RS resource index are set as values ​​of the pathlossReferenceRS field.

8. 4. The method of claim 3, wherein the configuration information configures, as a list of multiple TCI-related parameters, a first list applied upon activation of the first mode and a second RS list applied upon activation of the second mode.

9. the first list includes TCI-related parameters having indices belonging to a first set of indices; the second list includes TCI-related parameters having indices belonging to a second set of indices; The method of claim 8 , wherein at least one index belonging to the first set of indexes is not included in the second set of indexes.

10. 4. The method according to claim 3, wherein the configuration information configures, for one resource region or channel, a first radio resource to be applied upon activation of the first mode and a second radio resource to be applied upon activation of the second mode.

11. The method of claim 10 , wherein the resource region comprises a control resource set (CORESET) or a PUCCH.

12. A terminal in a wireless communication system, a transceiver, and a processor coupled to the transceiver; The processor: receiving configuration information for setting transmission configuration indication (TCI)-related parameters; receiving control information including the TCI-related parameters; Identifying a reference signal (RS) indicated by the TCI-related parameters; transmit or receive a signal related to the control information based on the reference RS; The configuration information indicates a first reference RS or a first radio resource to be applied to a first time interval for one value of the TCI-related parameter, and indicates a second reference RS or a second radio resource to be applied to a second time interval for a terminal.

13. A communication device, at least one processor, at least one computer memory coupled to the at least one processor and storing instructions that direct operations when executed by the at least one processor; The operation is receiving configuration information for configuring transmission configuration indication (TCI)-related parameters; receiving control information including the TCI-related parameters; Identifying a reference signal (RS) indicated by the TCI-related parameters; transmitting or receiving a signal related to the control information based on the reference RS; A communication device, wherein the configuration information indicates, for one value of the TCI-related parameter, a first reference RS or a first radio resource to be applied to a first time interval, and indicates a second reference RS or a second radio resource to be applied to a second time interval.

14. A non-transitory computer-readable medium storing at least one instruction, The at least one instruction executable by a processor is included; the at least one instruction causes the device to execute; The processor: receiving configuration information for setting transmission configuration indication (TCI)-related parameters; receiving control information including the TCI-related parameters; Identifying a reference signal (RS) indicated by the TCI-related parameters; transmit or receive a signal related to the control information based on the reference RS; A computer-readable medium in which the configuration information indicates, for one value of the TCI-related parameter, a first reference RS or a first radio resource to be applied in a first time interval, and a second reference RS or a second radio resource to be applied in a second time interval.

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