Method and apparatus for reporting channel state information in wireless communication system

Abstract

A method of a terminal according to one embodiment of the present disclosure may comprise the steps of: receiving operation mode configuration information for a first operation mode and a second operation mode from a base station; receiving, from the base station, resource allocation information for reporting CSI measured based on the operation mode configuration information; determining a CSI reference resource based on a preset CSI generation standard; measuring a plurality of first pieces of CSI received from the base station based on the operation mode configuration information; checking the validity of the plurality of measured first pieces of CSI; and transmitting a CSI report reflecting the valid CSI measurement value to the base station based on the check.

Description

Technical Field

[0001] The present disclosure relates to wireless communication technology, and more particularly, to a technology for reporting channel status in a wireless communication system. Background Art

[0002] Radio resources in mobile communication systems can be utilized in various transmission modes to address different scenarios, including integrated access and backhaul (IAB) node operation, multiple transmit and receive point (multi-TRP) operation, and in-band or out-of-band full-duplex communication operation.

[0003] On the other hand, in the above-mentioned mobile communication system, the transceiver (or base station or terminal) can operate with different time / frequency / space / power resources for the corresponding transmission mode, or operate according to instructions from the base station considering the corresponding transmission mode to improve the quality of wireless communication. This includes utilizing different numbers of antennas, antenna configurations, and transmission powers for the corresponding transmission mode. In 5G NR or 6G communication, there is an emerging demand for dynamically changing various transmission modes in order to ensure robustness and resilience to various communication environments while expanding the quality / capacity of wireless communication.

[0004] Furthermore, even in scenarios where a terminal is allocated a high proportion of uplink transmission time in a full-duplex communication system, there may be a need to receive downlink signals (such as a downlink control channel) during at least a portion of the allocated uplink transmission period. This necessity arises to achieve various goals, including cell-specific downlink reception, uplink-based channel estimation, and uplink beam changing. Summary of the Invention

[0005] Technical issues

[0006] The present disclosure, which is intended to address the above-mentioned needs, aims to provide a method for measuring and reporting channel state information to efficiently support dynamically changing transmission modes.

[0007] Technical Solution

[0008] A method for a terminal to achieve the above-mentioned purpose may include: receiving operating mode configuration information for a first operating mode and a second operating mode from a base station; receiving resource allocation information for reporting channel state information (CSI) measured based on the operating mode configuration information from the base station; determining a CSI reference resource based on a pre-configured CSI generation standard; measuring the first CSI received from the base station based on the operating mode configuration information; identifying the validity of the measured first CSI; and based on the identification result, sending a CSI report reflecting (one or more) valid CSI measurement values ​​to the base station, wherein the valid CSI may correspond to a case where the operating mode when the measurement of the first CSI is performed is equal to the operating mode when the CSI is reported based on the CSI reference resource.

[0009] The first operation mode may be one of a sub-band full duplex (SBFD) mode or a full duplex (FD) mode, and the second operation mode may be one of a time division duplex (TDD) mode or a frequency division duplex (FDD) mode.

[0010] In the first operating mode, first CSI may be measured in each of the one or more subbands.

[0011] In transmitting the CSI report, when only some of the valid CSI measurement value(s) can be reported, the valid CSI measurement value(s) to be transmitted may be determined based on a predetermined priority.

[0012] The method may also include: receiving first configuration information from the base station for configuring at least one of a channel measurement resource (CMR) or an interference measurement resource (IMR), wherein when the first configuration information indicates CMR, each of the first CSIs may be configured as a non-zero power (NZP) CSI-reference signal (RS), and when the first configuration information indicates IMR, each of the first CSIs may be configured as an NZP CSI-RS or a zero power (ZP) CSI-RS.

[0013] The method may further include excluding (one or more) invalid CSI measurement values ​​from the CSI report based on the identification result, wherein the (one or more) invalid CSI measurement values ​​may correspond to a case where the operating mode when performing CMR or IMR measurement is different from the operating mode when sending the CSI report based on the CSI reference resource.

[0014] At least one of the CMR or the IMR may be received periodically, semi-persistently, or aperiodically, and the CSI report may be sent to the base station periodically, semi-persistently, or aperiodically.

[0015] A transport block size (TBS) for CSI reporting may be determined based on at least one of a subband frequency resource or a subband time resource of an operation mode applied to a CSI reference resource.

[0016] According to an exemplary embodiment of the present disclosure, a method of a base station may include: sending operating mode configuration information for a first operating mode and a second operating mode to a terminal; sending resource allocation information for receiving a channel state information (CSI) report measured based on the operating mode configuration information to the terminal; sending a first CSI and a CSI reference resource to the terminal based on the operating mode configuration information; and receiving a CSI report from the terminal based on the resource allocation information, wherein the first operating mode is one of a sub-band full-duplex (SBFD) mode or a full-duplex (FD) mode, and the second operating mode is one of a time division duplex (TDD) mode or a frequency division duplex (FDD) mode.

[0017] In the first operating mode, the first CSI may be transmitted in each of the one or more subbands.

[0018] The method may also include: sending first configuration information to the terminal for configuring at least one of a channel measurement resource (CMR) or an interference measurement resource (IMR), wherein when the first configuration information indicates CMR, each of the first CSIs may be configured as a non-zero power (NZP) CSI-reference signal (RS), and when the first configuration information indicates IMR, each of the first CSIs may be configured as an NZP CSI-RS or a zero power (ZP) CSI-RS.

[0019] At least one of the CMR or the IMR may be periodically, semi-persistently, or aperiodically transmitted to the terminal, and the CSI report may be periodically, semi-persistently, or aperiodically received from the terminal.

[0020] According to an exemplary embodiment of the present disclosure, a terminal may include: a processor, and the processor may enable the terminal to perform: receiving operating mode configuration information for a first operating mode and a second operating mode from a base station; receiving resource allocation information for reporting channel state information (CSI) measured based on the operating mode configuration information from the base station; determining a CSI reference resource based on a pre-configured CSI generation standard; measuring the first CSI received from the base station based on the operating mode configuration information; identifying the validity of the measured first CSI; and based on a result of the identification, sending a CSI report reflecting (one or more) valid CSI measurement values ​​to the base station, wherein the valid CSI may correspond to a case where the operating mode when the measurement of the first CSI is performed is equal to the operating mode when the CSI is reported based on the CSI reference resource.

[0021] The first operation mode may be one of a sub-band full duplex (SBFD) mode or a full duplex (FD) mode, and the second operation mode may be one of a time division duplex (TDD) mode or a frequency division duplex (FDD) mode.

[0022] The processor may further cause the terminal to perform, in a first operating mode, measuring first CSI in each of the one or more subbands.

[0023] The processor may further cause the terminal to perform: in sending the CSI report, when only some of the (one or more) valid CSI measurement values ​​can be reported, determining (one or more) valid CSI measurement values ​​to be sent based on a predetermined priority.

[0024] The processor may also cause the terminal to perform: receiving first configuration information from a base station for configuring at least one of a channel measurement resource (CMR) or an interference measurement resource (IMR), wherein when the first configuration information indicates CMR, each of the first CSIs may be configured as a non-zero power (NZP) CSI-reference signal (RS), and when the first configuration information indicates IMR, each of the first CSIs may be configured as an NZP CSI-RS or a zero power (ZP) CSI-RS.

[0025] The processor may also cause the terminal to perform: excluding (one or more) invalid CSI measurement values ​​from the CSI report based on the identification result, wherein the (one or more) invalid CSI measurement values ​​may correspond to a case where the operating mode when performing CMR or IMR measurement is different from the operating mode when sending the CSI report based on the CSI reference resource.

[0026] The processor may further cause the terminal to perform: receiving at least one of a CMR or an IMR periodically, semi-persistently, or aperiodically; and sending a CSI report to a base station periodically, semi-persistently, or aperiodically.

[0027] A transport block size (TBS) for CSI reporting may be determined based on at least one of a subband frequency resource or a subband time resource of an operation mode applied to a CSI reference resource.

[0028] Beneficial effects

[0029] According to exemplary embodiments of the present disclosure, in an environment with multiple operating modes, resources for each mode can be configured. Furthermore, when the resources for each mode are variable, the base station can provide configuration information for effective channel state reporting to the terminal, enabling the terminal to report effective channel state information to the base station. Therefore, the base station can accurately determine the channel state through effective channel state reporting. This effectively expands the wireless communication capacity between the terminal and the base station. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a conceptual diagram illustrating an exemplary embodiment of a radio interface protocol structure in a communication system.

[0031] Figure 2 is a conceptual diagram illustrating an exemplary embodiment of time resources for transmitting a radio signal in a communication system.

[0032] Figure 3 is a conceptual diagram illustrating a time difference between a reception timing of an i-th downlink frame and a transmission timing of an i-th uplink frame in an exemplary embodiment of a communication system.

[0033] Figure 4 is a conceptual diagram illustrating an exemplary embodiment of a time / frequency resource grid for a communication system.

[0034] Figure 5 is a conceptual diagram illustrating an exemplary embodiment of a synchronization signal and physical broadcast channel (SS / PBCH) block of a communication system.

[0035] Figure 6 is a sequence diagram illustrating an exemplary embodiment of a random access procedure in a communication system.

[0036] Figure 7 is a conceptual diagram illustrating a first exemplary embodiment of SSB-RO association according to RACH configuration in a communication system.

[0037] Figure 8 is a conceptual diagram illustrating a second exemplary embodiment of SSB-RO association according to RACH configuration in a communication system.

[0038] Figure 9 is a conceptual diagram illustrating an exemplary embodiment of a QCL information transmission process through TCI state configuration and indication in a communication system.

[0039] Figure 10 is a conceptual diagram illustrating an exemplary embodiment of a TCI state activation / deactivation MAC CE in a communication system.

[0040] Figure 11 is a conceptual diagram illustrating an exemplary embodiment of a TCI status indication MAC CE in a communication system.

[0041] Figure 12 is a conceptual diagram illustrating a slot configuration according to a slot format in a communication system.

[0042] Figure 13 is a conceptual diagram illustrating an exemplary embodiment of an IAB network in a communication system.

[0043] Figure 14 is a block diagram illustrating an exemplary embodiment of a functional split structure of a central unit (CU) and a distributed unit (DU) in a communication system.

[0044] Figure 15 is a flow chart illustrating a first exemplary embodiment of a method for resource management of an IAB node in a communication system.

[0045] Figure 16 is a sequence diagram illustrating an exemplary embodiment of a UE capability reporting procedure in a communication system.

[0046] Figure 17a It is a conceptual diagram used to describe the structure of the user plane protocol stack in a communication system.

[0047] Figure 17b It is a conceptual diagram used to describe the control plane protocol stack structure in a communication system.

[0048] Figure 18a is a conceptual diagram for describing a user plane protocol structure for carrier aggregation (CA) in a base station of a communication system.

[0049] Figure 18b is a conceptual diagram for describing a user plane protocol structure for dual connectivity (DC) in a base station of a communication system.

[0050] Figure 19a is a conceptual diagram for describing a case where both the MT and DU of an IAB node are in the transmission mode.

[0051] Figure 19b is a conceptual diagram for describing a case where both the MT and DU of an IAB node are in reception mode.

[0052] Figure 19c is a conceptual diagram for describing a case where the MT of an IAB node is in a transmission mode and its DU is in a reception mode.

[0053] Figure 19d is a conceptual diagram for describing a case where the MT of an IAB node is in a receiving mode and its DU is in a transmitting mode.

[0054] Figure 20 This is a conceptual diagram for describing a method in which a base station allocates one or more operation modes within a resource period to a terminal.

[0055] Figure 21 is a conceptual diagram for describing a method in which a base station allocates resources to a terminal according to an operation mode by using time-frequency resources.

[0056] Figure 22is a conceptual diagram for describing a method in which a base station allocates resources to a terminal according to an operation mode by using frequency-time slots (or symbols).

[0057] Figure 23 is a conceptual diagram for describing CSI reporting for various operation modes according to an exemplary embodiment of the present disclosure.

[0058] Figure 24 is a sequence diagram illustrating CSI resource configuration and reporting configuration, CSI request, operation mode configuration / activation / indication, and CSI reporting according to an exemplary embodiment of the present disclosure.

[0059] Figure 25 1 is a flowchart of CSI resource configuration and report configuration, operation mode configuration / activation / indication, and CSI reporting depending on whether specific conditions are met according to an exemplary embodiment of the present disclosure.

[0060] Figure 26 is a conceptual diagram for describing CSI reporting in a first operation mode according to an exemplary embodiment of the present disclosure.

[0061] Figure 27 is a conceptual diagram for describing a case of CSI reporting in an environment where a first operation mode and a second operation mode coexist according to an exemplary embodiment of the present disclosure.

[0062] Figure 28 is a conceptual diagram for describing a subband CSI reporting operation according to an exemplary embodiment of the present disclosure.

[0063] Figure 29 is a block diagram illustrating a base station according to an exemplary embodiment of the present disclosure.

[0064] Figure 30 is a block diagram illustrating a terminal according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0065] While the present disclosure is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will be described in detail herein. However, it should be understood that there is no intention to limit the present disclosure to the particular forms disclosed, but on the contrary, the present disclosure is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure. Throughout the description of the drawings, like reference numerals refer to like elements.

[0066] It will be understood that although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, without departing from the scope of this disclosure, the first element may be referred to as the second element, and similarly, the second element may be referred to as the first element. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0067] In exemplary embodiments of the present disclosure, “at least one of A and B” may mean “at least one of A or B” or “at least one of one or more combinations of A and B.” Furthermore, “one or more of A and B” may mean “one or more of A or B” or “one or more of one or more combinations of A and B.”

[0068] In the present disclosure, “(re)transmission” may refer to “transmission”, “retransmission” or “transmission and retransmission”, “(re)configuration” may refer to “configuration”, “reconfiguration” or “configuration and reconfiguration”, “(re)connection” may refer to “connection”, “reconnection” or “connection and reconnection”, and “(re)access” may refer to “access”, “reaccess” or “access and reaccess”.

[0069] It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or intervening elements may be present. Conversely, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements. Other words used to describe the relationship between elements should be interpreted in a similar manner (i.e., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.).

[0070] The terms used herein are for the purpose of describing specific embodiments only and are not intended to limit the present disclosure. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprise," "comprising," "include," and / or "comprising" when used herein specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0071] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless explicitly defined as such herein.

[0072] Hereinafter, preferred exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. In describing the present disclosure, in order to facilitate overall understanding, the same reference numerals are used for the same elements in the drawings, and repeated descriptions of the same elements are omitted.

[0073] A communication network to which the exemplary embodiments of the present disclosure are applied will be described. The communication network to which the exemplary embodiments of the present disclosure are applied is not limited to the content described below, and the exemplary embodiments of the present disclosure can be applied to various communication networks. Here, the communication network can have the same meaning as the communication system. The communication network can refer to a wireless communication network, and the communication system can refer to a wireless communication system.

[0074] In the present disclosure, “configuration of an operation (e.g., a transmission operation)” may refer to signaling of “control information (e.g., information element, parameter) for an operation” and / or “information instructing to perform an operation.” “Information elements (e.g., parameters) are configured” may mean that corresponding information elements are sent using signals. In the present disclosure, signaling may be at least one of system information (SI) signaling (e.g., transmission of system information blocks (SIBs) and / or master information blocks (MIBs)), RRC signaling (e.g., transmission of RRC parameters and / or higher layer parameters), MAC control element (CE) signaling, or PHY signaling (e.g., transmission of downlink control information (DCI), uplink control information (UCI), and / or sidelink control information (SCI)).

[0075] Throughout this disclosure, a network may include, for example, wireless Internet (such as Wireless Fidelity (WiFi)), mobile Internet (such as Wireless Broadband Internet (WiBro) or Worldwide Interoperability for Microwave Access (WiMax)), 2G mobile communication networks (such as Global System for Mobile Communications (GSM) or Code Division Multiple Access (CDMA)), 3G mobile communication networks (such as Wideband Code Division Multiple Access (WCDMA) or CDMA2000), 3.5G mobile communication networks (such as High Speed ​​Downlink Packet Access (HSDPA) or High Speed ​​Uplink Packet Access (HSUPA)), 4G mobile communication networks (such as Long Term Evolution (LTE) networks or Advanced LTE networks), 5G mobile communication networks, beyond 5G (B5G) mobile communication networks (for example, 6G mobile communication networks), and the like.

[0076] Throughout this disclosure, a terminal may refer to a mobile station, mobile terminal, subscriber station, portable subscriber station, user equipment, access terminal, etc., and may include all or part of the functions of a terminal, mobile station, mobile terminal, subscriber station, mobile subscriber station, user equipment, access terminal, etc.

[0077] Here, a desktop computer, a laptop computer, a tablet PC, a wireless phone, a mobile phone, a smart phone, a smart watch, a smart glasses, an e-book reader, a portable multimedia player (PMP), a portable game console, a navigation device, a digital camera, a digital multimedia broadcasting (DMB) player, a digital audio recorder, a digital audio player, a digital photo recorder, a digital photo player, a digital video recorder, a digital video player, etc. with communication capabilities can be used as a terminal.

[0078] Throughout this disclosure, a base station may refer to an access point, a radio access station, a Node B (NB), an evolved Node B (eNB), a base transceiver station, a mobile multi-hop relay (MMR)-BS, etc., and may include all or part of the functions of a base station, an access point, a radio access station, a NB, an eNB, a base transceiver station, an MMR-BS, etc.

[0079] Hereinafter, preferred exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. In describing the present disclosure, in order to facilitate overall understanding, the same reference numerals are used for the same elements in the drawings, and repeated descriptions of the same elements are omitted.

[0080] In particular, the present disclosure described below provides a method for determining an uplink and / or downlink transmission direction of a terminal in a full-duplex communication system.

[0081] Figure 1 is a conceptual diagram illustrating an exemplary embodiment of a radio interface protocol structure in a communication system.

[0082] Reference Figure 1 , an exemplary embodiment of a radio interface protocol structure 100 of a communication system may be configured to include a radio resource control (RRC) layer 110 , a medium access control (MAC) layer 120 , a physical (PHY) layer 130 , and the like. Figure 1 The exemplary embodiment of the radio interface protocol structure 100 shown in the figure may correspond to various exemplary embodiments of an interface, such as an interface between a terminal and a base station, an interface between an IAB node distributed unit (IAB-DU) of an integrated access backhaul (IAB) network and an IAB node mobile terminal (IAB-MT), an interface between an IAB-DU and a lower-level node, an interface between an IAB-MT and an upper-level node, an interface between multiple terminals, and the like.

[0083] In the vicinity of the PHY layer 130, the RRC layer 110 and the MAC layer 120, etc., may be provided above the PHY layer 130. For example, the MAC layer 120 may be provided above the PHY layer 130. The RRC layer 110 may be provided above the MAC layer 120.

[0084] The MAC layer 120 may be connected to an upper layer (e.g., the RRC layer 110) through a logical channel 115. The PHY layer 130 may be connected to the higher MAC layer 120 through a transport channel 125. The PHY layer 130 may transmit and receive control information or measurement information 150 to and from the RRC layer 110.

[0085] The PHY layer 130 may be referred to as "layer 1" or "L1." The MAC layer 120 may be referred to as "layer 2" or "L2." The RRC layer 110 may be referred to as "layer 3" or "L3." The RRC layer 110 and the MAC layer 120 may be collectively referred to as "higher layers."

[0086] In the present disclosure, "L1 signaling" refers to signaling such as downlink control information (DCI) transmitted on the physical downlink control channel (PDCCH), uplink control information (UCI) transmitted on the physical uplink control channel (PUCCH), and sidelink control information (SCI) transmitted on the physical sidelink control channel (PSCCH), which are channels of the PHY layer 130. Similarly, in the present disclosure, "higher layer signaling" may include L2 signaling transmitted through a MAC control element (CE), L3 signaling transmitted through RRC signaling, and the like.

[0087] In particular, for ease of description, although in the present disclosure Figure 1 Information omitted in the above description but included in interfaces (e.g., F1, NG interfaces, etc.) between base stations or between base station components (such as distributed units (DUs) and central units (CUs)) may also be collectively referred to as high-layer signaling together with L2 signaling or L3 signaling.

[0088] In a communication system that applies 5G communication technology, etc., one or more of the digital sets in Table 1 can be used according to various purposes (such as reducing inter-carrier interference (ICI) according to frequency band characteristics, reducing delay according to service characteristics, etc.).

[0089] [Table 1]

[0090] μ <![CDATA[Δf=2 μ ·15[kHz]]]> cyclic prefix 0 15 Normal 1 30 Normal 2 60 Normal, extended 3 120 Normal 4 240 Normal

[0091] Table 1 is merely an example for ease of description, and exemplary embodiments of the digital set used in the communication system are not limited thereto. Each digital set μ may correspond to information about a subcarrier spacing (SCS) Δf and a cyclic prefix (CP). The terminal may identify the digital set μ and CP value applied to the downlink bandwidth part (BWP) or uplink BWP based on higher-layer parameters such as subcarrierSpacing and cyclicPrefix.

[0092] Figure 2 is a conceptual diagram illustrating an exemplary embodiment of time resources for transmitting a radio signal in a communication system.

[0093] Reference Figure 2 , which can include one or more The subframe 230 includes one or more The subframe 220 of the time slot includes 14 The time slot 210 of the OFDM symbol represents the time resource for transmitting radio signals in the communication system 200. In this case, according to the configured digital set, as and The value of , in the case of normal CP, may use the value according to the following Table 2, and in the case of extended CP, may use the value according to the following Table 3. OFDM symbols included in one slot may be classified as "downlink", "flexible", or "uplink" through higher layer signaling or a combination of higher layer signaling and L1 signaling.

[0094] [Table 2]

[0095]

[0096] [Table 3]

[0097]

[0098]

[0099] In a 5G NR communication system, the frame 230 may have a length of 10ms, and the subframe 220 may have a length of 1ms. Each frame 230 may be divided into two half-frames of the same length, and the first half-frame (i.e., half-frame 0) may consist of subframes #0 to #4, and the second half-frame (i.e., half-frame 1) may consist of subframes #5 to #9. One carrier may include a set of frames for uplink (i.e., uplink frames) and a set of frames for downlink (i.e., downlink frames).

[0100] Figure 3 is a conceptual diagram illustrating a time difference between a reception timing of an i-th downlink frame and a transmission timing of an i-th uplink frame in an exemplary embodiment of a communication system.

[0101] Reference Figure 3 , the time difference between the reception timing of the i-th downlink frame 300 and the transmission timing of the i-th uplink frame 310 may be TTA320. Therefore, the terminal may start transmitting the uplink frame #i 310 at a time TTA earlier than the reception timing of the downlink frame #i 300. TTA may be referred to as a timing advance or a timing adjustment TA. The base station may instruct the terminal to change the value of TTA through higher layer signaling or L1 signaling, and may configure the terminal to use the value defined as TTA. TA =(N TA +N TA,offset )T c In the case of 5G NR, T c Can be defined as Δf max It can be defined as Δf max =480kHz, N f Can be defined as N f =4096, N TA,offset It can be a value set by L3 signaling, and N TA It can be the value T indicated by L2 signaling A The value determined by the following equation 1.

[0102] [Equation 1]

[0103]

[0104] Here, about N TA,offset and N TA The description may be an example for a specific case, and various other options may exist, but in order not to obscure the main points of the description, all possible cases may not be listed in the present disclosure.

[0105] Figure 4 is a conceptual diagram illustrating an exemplary embodiment of a time / frequency resource grid for a communication system.

[0106] Reference Figure 4 , the time / frequency resource grid 400 of the communication system may have subcarriers and OFDM. A resource grid can be defined for each digital set and each carrier. In this case, It may refer to the location of the common resource block (CRB) indicated by higher layer signaling. It may mean the number of resource blocks (RBs) starting from the CRB, that is, the carrier bandwidth. and / or It may have different values ​​for each link direction (eg, uplink, downlink, or sidelink) or for each digital set μ. Here, the digital set μ may be referred to by other terms, such as SCS configuration, if necessary.

[0107] Each element in the resource grid for antenna port p and SCS configuration μ may be referred to as a resource element (RE) 420 and may be p,μ is uniquely defined. In this case, k can be the frequency axis index, and l can indicate the symbol position on the time axis. RE(k,l) p,μ Can be used to send physical channels or complex signal values One RB 410 can be defined as a continuous subcarriers.

[0108] The 5G NR communication system has introduced the concept of BWP to reduce the high implementation complexity and power consumption of the terminal due to the widened carrier bandwidth compared with the 3G / 4G communication system. A BWP can be composed of consecutive CRBs, and the starting RB position of the BWP is and the number of RBs that make up the BWP Equations 2 and 3 can be satisfied.

[0109] [Equation 2]

[0110]

[0111] [Equation 3]

[0112]

[0113] Up to four downlink BWPs can be configured for a terminal within a component carrier (CC), and only one downlink BWP can be active at a time. The terminal cannot receive the Physical Downlink Shared Channel (PDSCH), Physical Downlink Control Channel (PDCCH), Channel State Information Reference Signal (CSI-RS), etc. outside the activated BWP.

[0114] Up to four uplink BWPs can be configured for a terminal within a CC, and only one uplink BWP can be activated at a time. The terminal must not transmit the Physical Uplink Shared Channel (PUSCH), Physical Uplink Control Channel (PUCCH), Sounding Reference Signal (SRS), etc. outside the activated BWP.

[0115] Figure 5 is a conceptual diagram illustrating an exemplary embodiment of a synchronization signal and physical broadcast channel (SS / PBCH) block of a communication system.

[0116] Reference Figure 5 , the SS / PBCH block 500 of the communication system can be configured with a primary synchronization signal (PSS) transmitted in the middle 127 subcarriers of the first OFDM symbol, a secondary synchronization signal (SSS) transmitted in the middle 127 subcarriers of the third OFDM symbol, and a physical broadcast channel (PBCH) transmitted in the second, third, and fourth OFDM symbols. The PBCH occupying the widest bandwidth can be transmitted on 20 RBs, which can be 3.6 MHz based on a 15 kHz SCS. The base station transmits one SSB by applying the same beam. When the number of base station antennas increases or when it is necessary to operate multiple beams (such as applying one or more analog beams for high-frequency support), the base station can support multi-beam operation by transmitting multiple SSBs. Here, when applied in practice, the term "beam" can be expressed in various terms, such as transmit precoding or spatial transmit (TX) filter. However, in order not to obscure the key points of the description, "beam" is used as a unified term below.

[0117] For example, a base station may transmit multiple SSBs 530, 540, 550, and 560 to represent multiple beams (e.g., beam #1, beam #2, beam #3, and beam #4). In this case, one or more SSBs may be transmitted within a time slot according to a predetermined pattern for each digital set. SSBs 530, 540, 550, and 560 to which different beams are applied may be bundled into a set by being included in an SS burst 520. A terminal may assume a half-frame window with a length of 5 ms when monitoring SSBs. An SS burst set 515 configured by higher-layer signaling within a half-frame may include one or more SS bursts 520. If the RRC configuration value is unknown or unavailable when performing initial access (IA), the terminal may assume that the periodicity of the SS burst set 510 is 20 ms to receive or measure the SSBs. As an example, the terminal may receive (one or more) SSBs with reference to SSB configuration information that is the same as or similar to the SSB configuration information shown in Tables 4 and 5.

[0118] [Table 4]

[0119]

[0120]

[0121] [Table 5]

[0122]

[0123] Figure 6 is a sequence diagram illustrating an exemplary embodiment of a random access procedure in a communication system.

[0124] Reference Figure 6 In the random access procedure of the communication system 600, the terminal 615 may transmit a physical random access channel (PRACH) preamble, and the PRACH preamble may be referred to as "Msg1" (S620). By transmitting the PRACH preamble, a random access radio network temporary identifier (RA-RNTI) may be determined. In this case, the RA-RNTI may be calculated using Equation 4.

[0125] [Equation 4]

[0126]

[0127] In Equation 4, s id It can be the index of the first OFDM symbol corresponding to the PRACH opportunity (for example, 0≤s id ≤14), t id It can be the index of the first time slot of the PRACH opportunity within the system frame (for example, 0≤t id ≤80), f id It can be the index of the PRACH opportunity in the time domain (e.g., 0≤f id ≤8), and It may be a value according to the uplink carrier type used for preamble transmission (eg, 0 indicates a normal uplink carrier, 1 indicates a supplementary uplink carrier).

[0128] Before the terminal transmits the PRACH preamble, the terminal may obtain at least part of the following information by receiving system information from the base station on the PBCH or receiving RRC signaling from the base station.

[0129] -PRACH preamble format.

[0130] - Time / frequency resource information used for RACH transmission.

[0131] - Index into the logical root sequence list.

[0132] - Cyclic shift N CS .

[0133] - Collection type (unrestricted, restricted collection A, restricted collection B).

[0134] Refer again Figure 6As a second procedure, the base station may provide the terminal with a random access response (RAR), which may be referred to as "Msg2" (S630). Specifically, when the base station receives the PRACH preamble from the terminal in step S620, the base station may calculate the RA-RNTI based on Equation 4 and may transmit DCI using the RA-RNTI for scrambling. The terminal may monitor the PDCCH scrambled with the RA-RNTI during a period included in the RACH response window, which is configured by the higher layer in the Type 1 PDCCH Common Search Space (CSS). The terminal may receive the PDCCH (or DCI transmitted from the base station via the PDCCH) and may decode the PDCCH (or DCI). If the terminal successfully decodes the PDCCH (or DCI), the terminal may decode the PDSCH including the RAR transmitted from the base station in step S630. If the terminal successfully decodes the RAR, the terminal may identify whether the RA preamble identifier (RAPID) in the RAR matches the RAPID pre-assigned to the terminal.

[0135] As a third process, the terminal may transmit a PUSCH, which may be referred to as "Msg3," to the base station (S640). To this end, the terminal may determine whether to apply transform precoding to PUSCH transmission (i.e., whether to apply discrete Fourier transform (DFT)-s-OFDM transmission or OFDM-based transmission) based on a higher-layer parameter (e.g., Msg3-TransformPrecoding). In addition, the terminal may determine the SCS to be used for PUSCH transmission based on a higher-layer parameter (e.g., Msg3-scs). In this case, the PUSCH of Msg3 may be transmitted through the serving cell to which the PRACH has been transmitted.

[0136] As a fourth process, the base station may send a contention resolution message, which may be referred to as "Msg4," to the terminal (S650). The terminal may start a timer for receiving the contention resolution message and may monitor the PDCCH scrambled with the temporary cell-RNTI (TC-RNTI) in the Type 1 PDCCH CSS until the timer expires. If the terminal successfully decodes the PDCCH, the terminal may decode the corresponding PDSCH including the MAC CE and set the TC-RNTI to the cell-RNTI (C-RNTI). After successfully decoding Msg4, the terminal may report a positive acknowledgement (ACK) of its hybrid automatic repeat request (HARQ) to the base station and may report to the base station whether the RACH process is successful (S660).

[0137] RACH opportunity (RO) may refer to the time and frequency resources designated for the reception of the RACH preamble, and the terminal may use the RO for PRACH transmission. As described above, in 5G NR, multiple SSBs may be associated with different beams for multi-beam operation, and the terminal may measure multiple SSBs and select the best SSB (i.e., best beam) based on one of various schemes such as reference signal received power (RSRP), reference signal received quality (RSRQ), signal-to-noise ratio (SNR), signal-to-noise / interference ratio (SNIR), etc. Thereafter, the terminal may determine the beam (i.e., TX spatial filter) to be used for PRACH transmission based on the beam (i.e., RX spatial filter) used when receiving the best SSB. In this case, for the purpose of allowing the base station or network to know which SSB (i.e., beam) the terminal has selected, a relationship between (one or more) SSBs and (one or more) ROs may be established. Through such a relationship, the base station may know the SSB (i.e., beam) selected by the terminal based on the RO to which the terminal has sent the PRACH. For example, the relationship between (one or more) SSBs and (one or more) ROs may be determined with reference to high-level configurations that are the same as or similar to those shown in Tables 6 and 7.

[0138] [Table 6]

[0139]

[0140]

[0141] [Table 7]

[0142]

[0143] Figure 7 is a conceptual diagram illustrating a first exemplary embodiment of SSB-RO association according to RACH configuration in a communication system.

[0144] Reference Figure 7In the SSB-RO mapping relationship according to the RACH configuration, in a specific frequency band, N SSBs 710-1 to 710-n having time resources separated from each other can be mapped to ROs 720-1 to 720-n having time resources separated from each other on a one-to-one basis. For example, if the higher layer parameter msg1-FDM is set to 1 (i.e., msg1-FDM=1) and the higher layer parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB is set to 1 (e.g., ssb-perRACH-OccasionAndCB-PreamblesPerSSB=1), then N different SSBs 710-1 to 710-n can be mapped to N different ROs 720-1 to 720-n on a one-to-one basis.

[0145] Figure 8 is a conceptual diagram illustrating a second exemplary embodiment of SSB-RO association according to RACH configuration in a communication system.

[0146] Reference Figure 8 In the SSB-RO mapping relationship according to the RACH configuration, in the first frequency band, SSBs 810-1, 810-3, 810-5, ..., and 810-(n-1) having time resources separated from each other can be mapped on a one-to-one basis to ROs 820-1, 820-3, 820-5, ..., and 820-(n-1) having time resources separated from each other. In addition, in the second frequency band, SSBs 810-2, 810-4, 810-6, ..., and 810-n having time resources separated from each other can be mapped on a one-to-one basis to ROs 820-2, 820-4, 820-6, ..., and 820-n having time resources separated from each other. For example, if the higher layer parameter msg1-FDM is set to 2 (i.e., msg1-FDM=2) and the higher layer parameter ssb-perRACH-OccasionAndCB-PreamblesPerSSB is set to 2 (e.g., ssb-perRACH-OccasionAndCB-PreamblesPerSSB=2), then N different SSBs 810-1 to 810-n can be mapped to N different ROs 820-1 to 820-n that are frequency division multiplexed (FDM) in the frequency domain on a one-to-one basis.

[0147] In addition, the 5G NR communication system can support the DCI format shown in Table 8 based on Release 16.

[0148] [Table 8]

[0149]

[0150]

[0151] DCI may include downlink control information for one or more cells and may be associated with one RNTI. DCI may be encoded through the sequence of 1) information element multiplexing, 2) cyclic redundancy check (CRC) addition, 3) channel coding, and 4) rate matching, and decoding may also be performed taking into account the above steps. In the above description, "a certain DCI is associated with one RNTI" may mean that the CRC parity bits of the DCI are scrambled with the RNTI. Referring to Table 8, some DCI may include scheduling information for one or more PUSCHs for a certain cell.

[0152] For example, the CRC of DCI format 0_1 ​​may be scrambled with C-RNTI, configured scheduling-RNTI (CS-RNTI), semi-persistent CSIRNTI (SP-CSI-RNTI), or modulation and coding scheme cell RNTI (MCS-C-RNTI). DCI format 0_1 ​​may include at least one of the following information.

[0153] □ DCI format identifier (1 bit): an indicator indicating the UL DCI format, which is always set to 0 in the case of DCI format 0_1.

[0154] □ Carrier indicator (0 or 3 bits): an indicator indicating the CC scheduled by the corresponding DCI.

[0155] □DFI flag (0 or 1 bit): Configured Grant Downlink Feedback Information (CG-DFI) indicator.

[0156] If DCI format 0_1 ​​is used for CG-DFI indication (when the DFI flag is set to 1), at least one of the following fields may be used:

[0157] □ HARQ-ACK bitmap (16 bits), where the order in which the HARQ process index is mapped within the bitmap is that the HARQ process index is mapped from the MSB to the LSB of the bitmap in ascending order. For each bit in the bitmap, a value of 1 indicates ACK, and a value of 0 indicates NACK.

[0158] □ TPC command for scheduled PUSCH (2 bits).

[0159] □ All remaining bits in DCI format 0_1 ​​are set to zero.

[0160] If DCI format 0_1 ​​is not used for CG-DFI indication (when there is no DFI flag field or the DFI flag field is set to 0), at least one of the following fields may be used:

[0161] □UL / SUL indicator (0 or 1 bit): Supplementary UL indicator.

[0162] □ Bandwidth part indicator (0, 1 or 2 bits): an indicator indicating the BWP to be activated among the uplink BWPs configured for the terminal.

[0163] □Frequency domain resource allocation: indicator used to allocate frequency domain resources.

[0164] □Time domain resource allocation: indicator used to allocate time domain resources.

[0165] □Frequency hopping flag (0 or 1 bit): Frequency axis hopping indicator.

[0166] □ Modulation and coding scheme (5 bits).

[0167] □ New Data Indicator (NDI): An indicator indicating whether the allocated data is new data or retransmitted data.

[0168] □ Redundancy Version (RV): An indicator indicating the RV value when channel coding is applied to allocated data.

[0169] □ HARQ process number (4 bits): an indicator indicating the HARQ process to be allocated to the scheduled data.

[0170] □ TPC command for scheduled PUSCH (2 bits): TPC indicator.

[0171] □SRS resource indicator: aperiodic SRS resource selection indicator.

[0172] □ Precoding information and number of layers: An indicator indicating the precoding and number of transmission layers to be used in PUSCH transmission.

[0173] □ Antenna Port: Indicator of the uplink antenna port to be used for PUSCH transmission.

[0174] □SRS request: an indicator indicating whether to transmit aperiodic SRS.

[0175] □ CSI request: an indicator indicating whether and how to report channel state information.

[0176] □ PTRS-DMRS association: an indicator indicating the relationship between the uplink Phase Noise Tracking Reference Signal (PTRS) antenna port and the Demodulation Reference Signal (DMRS) antenna port.

[0177] □ DMRS sequence initialization: an indicator of the DMRS sequence initialization value during OFDM-based uplink transmission.

[0178] □ UL-SCH indicator: an indicator indicating whether the uplink shared channel (UL-SCH) is included in the PUSCH (the PUSCH not including the UL-SCH needs to include CSI).

[0179] □Open-loop power control parameter set indication: an indicator indicating the open-loop power control (OPLC) parameter set.

[0180] □ Priority indicator: Uplink transmission priority indicator.

[0181] □Invalid symbol mode indicator: An indicator indicating whether the invalid symbol mode configured by the higher layer is applied.

[0182] As another example, the CRC of DCI format 1_1 may be scrambled with C-RNTI, CS-RNTI, or MCS-C-RNTI, and DCI format 1_1 may include at least one of the following information.

[0183] □ Identifier for DCI format (1 bit): An indicator indicating a DL DCI format, which is always set to 1 in the case of DCI format 1_1.

[0184] □ Carrier indicator (0 or 3 bits): an indicator indicating the CC scheduled by the corresponding DCI.

[0185] □ Bandwidth part indicator (0, 1 or 2 bits): an indicator indicating the BWP to be activated among the downlink BWPs configured for the terminal.

[0186] □Frequency domain resource allocation: indicator used to allocate frequency domain resources.

[0187] □Time domain resource allocation: indicator used to allocate time domain resources.

[0188] □PRB bundling size indicator: An indicator indicating the type (ie, static or dynamic) and size of PRB bundling.

[0189] □Rate matching indicator: an indicator indicating the rate matching mode configured by the higher layer.

[0190] □ ZP CSI-RS trigger: an indicator for applying aperiodic zero power (ZP) CSI-RS.

[0191] □ “Modulation and coding scheme”, “New data indicator” and “Redundancy version” fields for transport block 1.

[0192] □ “Modulation and coding scheme”, “New data indicator” and “Redundancy version” fields for transport block 2.

[0193] □HARQ process number: an indicator indicating the HARQ process to be allocated to the scheduled data.

[0194] □ Downlink Allocation Index: DAI indicator used for HARQ-ACK codebook generation in TDD operation.

[0195] □ TPC command for scheduled PUCCH: Power control indicator for PUCCH transmission.

[0196] □ PUCCH resource indicator: An indicator indicating the PUCCH resource used to transmit HARQ-ACK information for the allocated PDSCH or a predetermined PDSCH set.

[0197] □PDSCH-to-HARQ_feedback timing indicator: an indicator indicating the time axis offset between the allocated PDSCH and PUCCH.

[0198] □ Antenna port(s): An indicator indicating the antenna port to be used for PDSCH transmission / reception.

[0199] □ Transmission Configuration Indication: An indicator indicating transmission configuration information (TCI) to be used for PDSCH transmission and reception.

[0200] □SRS request: an indicator indicating whether to transmit aperiodic SRS.

[0201] □DMRS sequence initialization: an indicator of the DMRS sequence initialization value used for PDSCH transmission and reception.

[0202] □ Priority indicator: PDSCH reception priority indicator.

[0203] As another example, certain DCI formats may be used to deliver the same control information to one or more terminals. For example, the CRC of DCI format 2_3 may be scrambled with a Transmit Power Control-Sounding Reference Signal-RNTI (TPC-SRS-RNTI) and may include at least one of the following information:

[0204] □ Block number 1, block number 2, ..., block number B: indicators indicating the resource region to which DCI format 2_3 is applied. The starting part of the block is configured by the higher layer parameter startingBitOfFormat2-3 or startingBitOfFormat2-3SUL-v1530.

[0205] -When the higher-layer parameter srs-TPC-PDCCH-Group is set to a type-A terminal and performs uplink transmission without PUCCH and PUSCH or uplink transmission in which SRS power control is not bundled with PUSCH power control, one block is configured by the higher layer and the following fields are defined for the block.

[0206] □SRS request (0 or 2 bits): aperiodic SRS transmission indicator.

[0207] □ TPC Command Number 1, TPC Command Number 2, ..., TPC Command Number N: indicators indicating uplink power control to be applied to the UL carrier indicated by the higher layer parameter cc-IndexInOneCC-Set.

[0208] -When the higher-layer parameter srs-TPC-PDCCH-Group is set to a type B terminal and performs uplink transmission without PUCCH and PUSCH or uplink transmission in which SRS power control is not tied to PUSCH power control, one or more blocks may be configured by the higher layer and the following fields may be defined for each block.

[0209] □SRS request (0 or 2 bits): an indicator of aperiodic SRS transmission.

[0210] □TPC command (2 bits).

[0211] As another example, certain DCI formats can be used to deliver the same control information to multiple terminals. For example, the CRC of DCI format 2_0 can be scrambled with the SFI-RNTI and can be used to notify information such as (one or more) time slot formats, (one or more) channel occupancy time (COT) durations, (one or more) available RB sets, and search space set group switching. Specifically, DCI format 2_0 may include at least one of the following information.

[0212] - If the high-level parameter slotFormatCombToAddModList is configured,

[0213] □Slot format indicator 1, slot format indicator 2, ..., slot format indicator N.

[0214] - If the high-level parameter availableRB-SetsToAddModList-r16 is configured,

[0215] □ Available RB set indicator 1, available RB set indicator 2, ..., available RB set indicator N1.

[0216] - If the high-level parameter co-DurationsPerCellToAddModList-r16 is configured,

[0217] - COT duration indicator 1, COT duration indicator 2, ..., COT duration indicator N2.

[0218] - If the high-level parameter searchSpaceSwitchTriggerToAddModList-r16 is configured,

[0219] □ Search space set group switching flag 1, search space set group switching flag 2, ..., search space set group switching flag M.

[0220] The size of DCI format 2_0 can be set by higher layers to a value of no more than 128 bits. For example, DCI format 2_5 can be used to notify the IAB node of the availability of soft type resources. The CRC of DCI format 2_5 can be scrambled with the availability indicator (AI)-RNTI and may include the following information.

[0221] □Availability indicator 1, availability indicator, ..., availability indicator N.

[0222] The size of DCI format 2_5 can be set by higher layers to one of values ​​less than or equal to 128 bits.

[0223] The terminal may receive configuration information of CORESET#0 and search space#0 that is the same as or similar to that shown in Table 9.

[0224] [Table 9]

[0225]

[0226] The terminal may refer to the following high-level configurations for cell-specific PDCCH monitoring that are the same as or similar to the configurations shown in Tables 10 to 13.

[0227] [Table 10]

[0228]

[0229]

[0230] [Table 11]

[0231]

[0232] [Table 12]

[0233]

[0234]

[0235] [Table 13]

[0236]

[0237]

[0238] The terminal may refer to the following high-level configuration for UE-specific PDCCH monitoring that is the same as or similar to the configuration shown in Table 14.

[0239] [Table 14]

[0240]

[0241] The presence of one antenna port may mean that a channel experienced by a symbol transmitted through the corresponding antenna port can be estimated or inferred from a channel experienced by another symbol transmitted through the same antenna port.

[0242] "Two different antenna ports are quasi-co-located (QCL)" may mean that the large-scale characteristics of the channel experienced by symbols transmitted through one antenna port can be estimated or inferred from the channel experienced by symbols transmitted through the other antenna port. The large-scale characteristics of the channel may refer to at least one of "delay spread," "Doppler spread," "Doppler shift," "average gain," "average delay," and "spatial Rx parameters."

[0243] When the time / frequency resources of a certain signal (e.g., a QCL target RS) are insufficient and the large-scale characteristics of the channel cannot be accurately measured using only the corresponding signal, information (i.e., QCL information) about another signal (e.g., a QCL reference RS with sufficient time / frequency resources) having large-scale characteristics that can be reused to receive the corresponding signal (i.e., QCL target RS) can be provided to the terminal to improve the channel measurement performance of the terminal. NR communication systems can support various QCL types as follows.

[0244] - QCL Type A: includes {Doppler shift, Doppler spread, average delay, delay spread}.

[0245] -QCL Type B: includes {Doppler shift, Doppler spread}.

[0246] -QCL-Type C: includes {Doppler shift, average delay}.

[0247] -QCL-Type D: includes {spatial Rx parameters}.

[0248] Figure 9It is a conceptual diagram showing an exemplary embodiment of the process of QCL information transmission configured and indicated by TCI status in a communication system.

[0249] Referring to Figure 9 , in the process of transmitting QCL information through TCI status configuration and indication in the communication system 900, the base station can configure up to M TCI states for the terminal through high-layer (i.e., RRC) signaling according to the UE capability report and the maximum value defined in the technical specification (e.g., 4, 8, 64, or 128 depending on the frequency band) (S930). In this case, each TCI status configuration 910 may include information about the signal or channel (i.e., QCL reference 915) that provides large-scale channel characteristics to the signal or channel to the reference TCI (i.e., QCL target 920). One TCI status configuration 910 may include up to two references (i.e., qcl-type 1 and qcl-type 2), the first reference may be one of QCL-Type A, QCL-Type B, and QCL-Type C (i.e., qcl-type 1 ∈ {QCL-Type A, QCL-Type B, QCL-Type C}), and the second reference may be QCL-Type D (if it exists) (i.e., qcl-type 2 = QCL-Type D).

[0250] Allowing the base station to apply all TCIs configured by RRC signaling in real time may greatly increase the implementation complexity of the terminal. The base station can send activation messages for some TCIs configured by RRC signaling to the terminal through L2 signaling such as MAC CE (S940). The base station can activate up to N (<M) TCIs, and the terminal can receive dynamic indications only for the activated TCIs.

[0251] Thereafter, the base station can dynamically indicate some of the N activated TCIs to the terminal through L1 signaling such as DCI (S950). The terminal can apply the QCL information indicated by the corresponding TCI at a predetermined timing after receiving the L1 signaling, and can perform the reception operation for the signal or channel.

[0252] According to the type of the QCL target RS, the TCI status indication steps including Figure 9 "RRC signaling (S930)", "MAC CE signaling (S940)", and "DCI signaling (S950)" can be partially omitted. For example, when the QCL target is PDSCH DMRS and one or more TCI states are configured through RRC signaling, the base station can use Figure 9All steps of the TCI state are used to indicate the TCI state. However, when the QCL target is the PDSCH DMRS and a single TCI state is configured through RRC signaling, the MAC CE signaling (S940) and the DCI signaling step (S950) can be omitted. Similarly, when the QCL target is the PDCCH DMRS, the DCI signaling step S940 can be omitted. Specifically, the terminal can refer to RRC signaling that is the same as or similar to those shown in Table 15 to obtain configuration information and QCL information of the TCI state.

[0253] [Table 15]

[0254]

[0255] The base station may instruct the terminal to activate or deactivate some of the TCI states configured by RRC signaling through MAC CE signaling, or may instruct the terminal to apply the TCI state indicated by MAC CE to the QCL target RS. For example, the base station may use the following MAC CE signaling according to the type of QCL target RS.

[0256] -TCI state activation / deactivation MAC CE for UE-specific PDSCH DMRS.

[0257] -TCI status indication MAC CE for UE-specific PDCCH DMRS.

[0258] - TCI state activation / deactivation MAC CE for enhanced UE-specific PDSCH DMRS.

[0259] Figure 10 is a conceptual diagram illustrating an exemplary embodiment of a TCI state activation / deactivation MAC CE in a communication system.

[0260] Reference Figure 10 The first octet (Oct 1) in the TCI state activation / deactivation MAC CE for UE-specific PDSCH DMRS may include a COREST pool ID field 1010, a serving cell ID field 1020, and a BWPID field 1030, and the second octet (Oct 2) to the Nth octet (Oct N) may include a Ti field 1040 indicating TCI state ID i. The detailed meaning of each field may be as follows, and its size may be variable.

[0261] - Serving cell ID: Serving cell ID to which MAC CE is applied.

[0262] -BWP ID: BWP ID of the application MAC CE, which indicates the BWP associated with the BWP indication field in the DCI.

[0263] -Ti: Indicates TCI state ID i. When this value is set to 0, it may mean that the TCI state with TCI state ID i is deactivated, and when this value is set to 1, it may mean that the TCI state with TCI state ID i is activated. The TCI states activated by 1 may be sequentially mapped to the TCI indication field code points in the DCI.

[0264] - CORESET Pool ID: If DCI scheduling PDSCH is monitored in a CORESET that does not include the higher-layer parameter coresetPoolIndex, this field may be ignored. If DCI scheduling PDSCH is monitored in a CORESET that includes the higher-layer parameter coresetPoolIndex, the Ti indication may only be applied if the value of the CORESET Pool ID matches the value of the CORESET's coresetPoolIndex.

[0265] Figure 11 is a conceptual diagram illustrating an exemplary embodiment of a TCI status indication MAC CE in a communication system.

[0266] Reference Figure 11 The first octet (Oct 1) in the TCI state activation / deactivation MAC CE for UE-specific PDSCH DMRS may include a serving cell ID field 1110 and a CORESET ID field 1120, and the second octet (Oct 2) may include a CORESET ID field 1130 and a TCI state ID field 1140. Its size may be variable.

[0267] -Serving cell ID: Serving cell ID of the corresponding MAC CE.

[0268] -CORESETID: Indicates the CORESET to which the MAC CE is applied. If this value is set to 0, the CORESET configured by controlResourceSetZero may be CORESET#0.

[0269] -TCI State ID: means the TCI state ID indicated by the corresponding MAC CE.

[0270] The base station may configure spatial relationship information to the terminal through high-layer (e.g., RRC) signaling to indicate uplink beam information. Spatial relationship information may mean a signaling structure for using a spatial domain filter for transmission and reception of a reference RS for a spatial TX filter for uplink transmission of a target RS according to a corresponding spatial relationship. The spatial reference RS may be a downlink signal such as an SSB or CSI-RS, and may also be an uplink signal such as an SRS. If the reference RS is a downlink signal, the terminal may use the spatial RX filter value for receiving the reference RS as the spatial TX filter value for transmitting the target RS according to the spatial relationship. If the reference RS is an uplink signal, the terminal may use the spatial TX filter value for transmitting the reference RS as the spatial TX filter value for transmitting the target RS according to the spatial relationship.

[0271] The signaling structure for spatial relationship information may vary depending on the type of target RS. For example, when the target RS is SRS, the base station may perform RRC configuration for each SRS resource based on a message that is the same as or similar to the message shown in Table 16.

[0272] [Table 16]

[0273]

[0274] For example, when the target RS is an SRS, the base station may perform an RRC configuration identical to or similar to the RRC configuration shown in Table 17 for each SRS resource.

[0275] [Table 17]

[0276]

[0277]

[0278] In a 5G NR communication system, a slot format may include downlink symbol(s), uplink symbol(s), and / or flexible symbol(s).

[0279] Figure 12 is a conceptual diagram illustrating a slot configuration according to a slot format in a communication system.

[0280] Reference Figure 12In a slot configuration according to a slot format in a communication system, a downlink-dedicated slot 1200 may be a slot in which all symbols within the slot are configured only as downlink symbols 1215 according to the slot format. As another example, an uplink-dedicated slot 1205 may be a slot in which all symbols within the slot are configured only as uplink symbols 1220 according to the slot format. As another example, in a downlink / uplink mixed slot 1210, some symbols within the slot may be configured as downlink symbols 1225, and some symbols within the slot may be configured as uplink symbols 1235 according to the slot format. In this case, specific symbols of the mixed slot 1210, which includes both uplink and downlink symbols, may be configured or indicated as a guard period 1230 for downlink-uplink switching, and the terminal may not perform transmission / reception during the guard period 1230.

[0281] In a 5G NR communication system, a base station may configure a "time slot format" for one or more time slots of each serving cell to a terminal via the higher-layer parameter tdd-UL-DL-ConfigurationCommon. In this case, the higher-layer parameter tdd-UL-DL-ConfigurationCommon may include or reference at least one of the following information:

[0282] -Reference subcarrier spacing: Reference digital set μ ref .

[0283] -Mode 1: First mode.

[0284] -Mode 2: Second mode.

[0285] Here, Mode 1 or Mode 2 may include at least one of the following configurations.

[0286] -Slot configuration periodicity (ie, dl-UL-TransmissionPeriodicity): The slot configuration periodicity P expressed in milliseconds (msec).

[0287] - Number of downlink dedicated time slots (i.e., nrofDownlinkSlots): The number of time slots consisting of only downlink symbols d slots .

[0288] - Number of downlink symbols (ie, nrofDownlinkSymbols): the number of downlink symbols d sym .

[0289] - Number of uplink dedicated time slots (i.e., nrofUplinkSlots): The number of time slots consisting of only uplink symbols u slots .

[0290] - Number of uplink symbols (ie, nrofUplinkSymbols): the number of uplink symbols u sym .

[0291] The first mode of time slot configuration periodicity P milliseconds may include time slots, and in this case, the set of numbers can follow μ ref In addition, in S time slots, the first d slots The time slots may include only downlink symbols, and the last u slots The first d time slots may contain only uplink symbols. slots d after time slots sym symbols can be downlink symbols. In addition, the last u slots u time slots ago sym The remaining symbols in the pattern that are not designated as downlink symbols or uplink symbols (i.e., symbols) can be flexible symbols.

[0292] If the second mode is configured and the slot configuration periodicity of the second mode is P2, the slot configuration periodicity P+P2 milliseconds configured with the combination of the first mode and the second mode may include the first time slot and the second In this case, the positions and numbers of downlink symbols, uplink symbols, and flexible symbols in the second mode may be configured based on the configuration information of the second mode with reference to the description of the first mode. In addition, when configuring the second mode, the terminal may assume that P+P2 is a divisor of 20 milliseconds.

[0293] The base station may override the direction(s) of “flexible symbol(s)” among symbols configured by the higher layer parameter tdd-UL-DL-ConfigurationCommon by using the higher layer parameter tdd-UL-DL-ConfigurationDedicated based on the following information.

[0294] - Slot Configuration Set (ie, slotSpecificConfigurationsToAddModList): a collection of slot configurations.

[0295] - Slot index (ie, slotIndex): the index of a slot included in the set of slot configurations.

[0296] -Symbol direction (i.e., symbols): The direction of the symbol indicated by the slot index (i.e., slotIndex). If all symbol directions are downlink (symbols=allDownlink), all symbols in the corresponding slot are downlink symbols. If all symbol directions are uplink (symbols=allUplink), all symbols in the corresponding slot are uplink symbols. If the symbol direction is explicit (symbols=explicit), nrofDownlinkSymbols may indicate the number of downlink symbols located in the front part of the corresponding slot, and nrofUplinkSymbols may indicate the number of uplink symbols located in the last part of the corresponding slot. If nrofDownlinkSymbols or nrofUplinkSymbols is omitted, the corresponding parameter may be regarded as indicating a value of 0. The remaining symbols in the slot become flexible symbols.

[0297] In a 5G communication system, the base station may indicate the time slot format to the terminal based on L1 signaling. For example, when the terminal receives the high-layer parameter SlotFormatIndicator from the base station, the terminal may obtain the configuration information of the time slot format indication-RNTI (i.e., SFI-RNTI). In addition, when the terminal receives the high-layer parameter dci-PayloadSize from the base station, the terminal may obtain the configuration information of the payload size of DCI format 2_0. In addition, the terminal may further receive information about (one or more) PDCCH candidates, CCE aggregation levels, and (one or more) search space sets of the CORESET for monitoring DCI format 2_0 from the base station. Each time slot format indication (SFI) index field in DCI format 2_0 may indicate the time slot format to be applied to each time slot in the time slot set of DL BWP and UL BWP starting from the time slot in which the terminal has detected the corresponding DCI format 2_0. In this case, the size of the time slot set may be equal to or greater than the PDCCH monitoring periodicity of DCI format 2_0. For example, when the slot set consists of N slots, DCI format 2_0 may include N SFI index fields, and each SFI index field may indicate a format value of the following Tables 18 to 20. In Tables 18 to 20, "D" may mean a downlink symbol, "U" may mean an uplink symbol, and "F" may mean a flexible symbol.

[0298] [Table 18]

[0299]

[0300] [Table 19]

[0301]

[0302] [Table 20]

[0303]

[0304] In the 5G NR communication system, in the absence of wired network support, the IAB feature can support flexible and dense wireless backhaul links for each cell.

[0305] Figure 13 is a conceptual diagram illustrating an exemplary embodiment of an IAB network in a communication system.

[0306] Reference Figure 13 The communication system 1300 may include one or more communication nodes. The communication nodes of the communication system 1300 may constitute an IAB network. For example, the communication system 1300 may include one or more IAB nodes. Figure 13 An exemplary embodiment is shown in which one IAB node communicates with one or more upper nodes and one or more lower nodes. However, this is merely an example for convenience of description, and exemplary embodiments of the present disclosure are not limited thereto.

[0307] The communication system 1300 may include multiple IAB nodes. For example, the communication system 1300 may include a first IAB node 1310, one or more parent nodes 1320 corresponding to the upper-level node of the first IAB node 1310, and / or one or more child nodes 1330 corresponding to the lower-level node of the first IAB node 1310. Here, each of the one or more parent nodes 1320 may be referred to as a "donor node." The IAB node 1310, one or more parent nodes 1320, and / or one or more child nodes 1330 may constitute an IAB network. Each of the IAB nodes 1310, 1320, and 1330 constituting the IAB network may function as a type of repeater configured based on a fronthaul architecture. In the communication system 1300 employing IAB network technology, flexible and dense wireless backhaul links may be supported for each cell without wired network support.

[0308] Each of the IAB nodes 1310, 1320, and 1330 may include an IAB-DU and an IAB-MT. The IAB-MT allows each IAB node to function as a terminal for communicating with a higher-level node. For example, the first IAB node 1310 may communicate with the upper-level parent node 1320 via the IAB-MT. On the other hand, the IAB-DU allows each IAB node to function as a base station or cell for communicating with lower-level nodes. For example, the first IAB node 1310 may communicate with the lower-level child node 1330 or terminal 1340 via the IAB-DU.

[0309] The IAB-MT of the first IAB node 1310 may be connected to the IAB-DU of the parent node 1320 via a Uu interface 1325. The IAB-DU of the first IAB node 1310 may be connected to the IAB-MT of the child node 1330 via a Uu interface 1335. The IAB-DU of the first IAB node 1310 may be connected to the terminal 1340 via a Uu interface 1345.

[0310] After an IAB node constituting an IAB network fully decodes a received signal, it may re-encode the decoded received signal, amplify it, and transmit it. The IAB node can be classified as a regenerative relay. To this end, the IAB node may support a control plane (CP) and a user plane (UP) from a parent node to a terminal based on a protocol stack structure including L1 and L2 layers or higher layers.

[0311] The IAB nodes constituting the IAB network have the advantage of being able to perform various operations including operations as a base station and a terminal. On the other hand, the IAB nodes have the disadvantages of being relatively complex to implement and having relatively high production costs, and that the delay required for retransmission may be relatively large.

[0312] Figure 14 is a block diagram illustrating an exemplary embodiment of a functional division structure of a central unit (CU) and a distributed unit (DU) in a communication system.

[0313] Reference Figure 14 In the CU-DU functional split structure in the IAB network, IAB nodes 1410 and 1415 in a two-hop chain are connected to an IAB donor 1405, and each of the IAB nodes 1410 and 1415 and terminals 1420, 1422, and 1424 can be connected to the Next Generation Core (NGC) 1400 in standalone (SA) mode. The IAB nodes 1410 and 1415 can each include a DU and a MT. An IAB node (e.g., 1415) can be connected to the parent IAB node 1410 or the IAB donor 1405 via the MT 1417. As another example, an IAB node (e.g., 1410) can establish an RLC channel with the MT 1417 of the child IAB node 1415 via the DU 1414. In this case, in addition to the existing components of the RLC channel for the terminal, the RLC channels 1450 and 1452 established for the MTs 1412 and 1417 can additionally include some information used for IAB operations. Thus, RLC channels 1450 and 1452 may be collectively referred to as "modified RLC* (RLC*)."

[0314] An IAB node may be connected to one or more parent IAB nodes or DUs of an IAB donor. In this case, the IAB node may include multiple DUs, but each DU of the IAB node may have an F1-C connection 1440 or 1442 with a single IAB donor CU-CP. Even if the IAB node has multiple UP connections, the IAB node may operate based on a single CP connection (i.e., the IAB node may operate by being connected to a single IAB donor), thereby preventing confusion in the operation of the IAB node.

[0315] The IAB donor 1405 may include a DU for supporting the MT of the terminal and child IAB nodes. The IAB donor 1405 may include a CU 1407 for its own DUs 1409, 1414, and 1419 of all child IAB nodes. It may be assumed that a certain IAB donor has a single IAB donor, and the IAB donor that manages the corresponding IAB donor may be changed through the topology adaptation function. The DUs of the IAB nodes may be connected to the CU of the corresponding IAB donor via an F1 interface or a modified F1 interface (modified F1, F1*) (e.g., 1440, 1442). The F1*-user plane (U) may operate on RLC channels 1450 and 1452 between the corresponding IAB-MTs 1417 and 1412 and the DUs 1414 and 1409 of the parent IAB node or donor.

[0316] Hereinafter, for ease of description, in the present disclosure, high-level parameters or high-level configurations may not be limited to the above-mentioned L2 and L3 signaling, and may collectively include information sent or configured through the F1 interfaces 1440 and 1442, the NG interface 1430 for connecting the CU to the NGC, the X2 interface, and the like.

[0317] Although it may seem that reference Figure 11 and Figure 12 The time slot format configuration and indication method described are limited to the terminal performing communication with the base station, but this is only an example for convenience of description, and the exemplary embodiments of the present disclosure are not limited thereto. Figure 11 and Figure 12The described time slot format configuration and indication method can be similarly applied to the case of IAB-DU and / or IAB-MT. For example, for each service cell of the IAB-DU, the IAB-DU may receive the high-level parameter IAB-DU-Resource-Configuration for IAB-DU resource configuration, thereby configuring the time slot format in each time slot set. On the other hand, the IAB-MT may receive configuration information of the "time slot format" for each service cell in one or more time slots from at least one upper node of the IAB-MT through the high-level parameter tdd-UL-DL-ConfigurationDedicated-IAB-MT. When the IAB-MT receives the high-level parameter tdd-UL-DL-ConfigurationDedicated-IAB-MT, the received high-level parameter may replace the high-level parameter tdd-UL-DL-ConfigurationDedicated in the above-mentioned time slot format configuration and indication method. Specifically, the high-level parameter tdd-UL-DL-ConfigurationDedicated-IAB-MT may include the following information.

[0318] IAB-MT slot configuration set (ie, slotSpecificConfigurationsToAddModList-IAB-MT): a collection of slot configurations.

[0319] Slot index (ie, slotIndex): The index of a slot included in the set of slot configurations.

[0320] IAB-MT symbol direction (i.e., symbols-IAB-MT): the direction of the slot indicated by the slot index.

[0321] If the IAB-MT symbol direction is all downlink (symbols-IAB-MT=allDownlink), all symbols in the corresponding time slot are downlink symbols.

[0322] If the IAB-MT symbol direction is all uplink (symbols-IAB-MT=allUplink), all symbols in the corresponding time slot are uplink symbols.

[0323] If the IAB-MT symbol direction is explicit (symbols-IAB-MT=explicit), nrofDownlinkSymbols may indicate the number of downlink symbols in the first part of the slot, and nrofUplinkSymbols may indicate the number of uplink symbols in the last part of the corresponding slot. If nrofDownlinkSymbols or nrofUplinkSymbols is omitted, the corresponding parameter may be considered to indicate a value of 0. The remaining symbols in the slot become flexible symbols.

[0324] If the IAB-MT symbol direction is explicit (symbols-IAB-MT=explicit-IAB-MT), nrofDownlinkSymbols may indicate the number of downlink symbols in the first part of the slot, and nrofUplinkSymbols may indicate the number of uplink symbols in the last part of the corresponding slot. If nrofDownlinkSymbols or nrofUplinkSymbols is omitted, the corresponding parameter may be considered to indicate a value of 0. The remaining symbols in the slot become flexible symbols.

[0325] Similar to the conventional terminal described above, the IAB-MT can also receive DCI format 2_0 and, by doing so, can receive slot format configuration information from the base station of the parent IAB-DU. In the case of DCI format 2_0 received by the IAB-MT, the candidate values ​​for each SFI field are not limited to the values ​​shown in Table 14. For example, the candidate values ​​for each SFI field in DCI format 2_0 received by the IAB-MT may further include the values ​​shown in Table 21 and Table 22.

[0326] [Table 21]

[0327]

[0328]

[0329] [Table 22]

[0330]

[0331] The IAB-MT may receive information about symbols that will not be used by the IAB-MT for a certain serving cell via a higher-layer parameter (e.g., a provided guard symbol MAC CE). The IAB-MT may perform a switch (i.e., a change in operation) between the IAB-MT and IAB-DU of the IAB node during a period including symbols not used by the IAB-MT. The base station may signal the set of symbols to the terminal via a higher-layer parameter (e.g., a provided guard symbol MAC CE).

[0332] In a cell of a certain IAB-DU, symbols within a time slot can be configured as one of three types: "hard", "soft" and "not available (or non-usable)" (HSNA).

[0333] If a certain downlink, uplink, or flexible symbol is configured as a hard type, the cell of the IAB-DU may perform signal transmission and / or reception operations in the corresponding symbol. This may mean that the fact that a certain symbol is configured as a hard type ensures that the downlink, uplink, or flexible symbol configuration of the IAB-DU used for the corresponding symbol is reflected.

[0334] Specifically, in an exemplary embodiment of a communication system, F1 Application Protocol (F1AP) signaling as shown in Table 23 may be provided, and an upper-level IAB node (e.g., an IAB donor, a parent node, a core network, etc.) may configure the DU resource type of a lower-level IAB node (e.g., an IAB node, a child node). Referring to Table 23, the DU resource type information may include an HSNA time slot configuration list consisting of one or more HSNA time slot configurations. In this case, an HSNA time slot configuration list may include HSNA time slot configurations based on a maximum number of HSNAs (e.g., maxnoofHSNA). The nth HSNA time slot configuration included in the HSNA time slot configuration list may include information regarding whether a hard type, a soft type, or an unavailable type is applied to each of the downlink symbols, uplink symbols, and flexible symbols of the nth time slot based on the application periodicity and start time of the HSNA time slot configuration list.

[0335] [Table 23]

[0336]

[0337] If a certain downlink, uplink, or flexible symbol is configured as a soft type, the IAB-DU cell may perform signal transmission and reception operations in the symbol when at least one of the following conditions is met.

[0338] - Condition 1: The IAB-MT (co-located / associated with the IAB-DU) does not perform transmission or reception in the corresponding symbol.

[0339] - Condition 2: The IAB-MT (co-located / associated with the IAB-DU) can perform transmission or reception in the corresponding symbols, but the transmission / reception operation of the IAB-MT does not change due to the use of symbols at the IAB-DU.

[0340] - Condition 3: The IAB-MT (co-located / associated with the IAB-DU) receives DCI format 2_5 indicating that the corresponding soft symbol is "available".

[0341] If a certain downlink, uplink, or flexible symbol is configured as "unavailable (or non-available (NA)) type", the IAB-DU (ie, cell) may not perform transmission or reception in the symbol.

[0342] If the IAB-DU transmits one of the cell-specific, periodic, or semi-static signals or channels included in the following list in (one or more) symbols of a certain time slot, the IAB-DU can perform transmission / reception operations by assuming that the corresponding (one or more) symbols in the corresponding time slot are configured as hard type regardless of the configured resource type.

[0343] -SS / PBCH block, type 0-PDCCH CSS set for PDCCH configuration configured by system information block 1 (SIB1) (ie, PDCCH of type 0-PDCCH CSS set configured by pdcchConfigSIB1), periodic CSI-RS, etc.

[0344] If the IAB-DU receives one of the cell-specific, periodic, or semi-static signals or channels included in the following list in (one or more) symbols of a certain time slot, the IAB-DU can perform transmission / reception operations by assuming that the corresponding (one or more) symbols in the corresponding time slot are configured as hard type regardless of the configured resource type.

[0345] PRACH, Scheduling Request (SR).

[0346] -The following information can be configured for each cell in the cell set of IAB-DU.

[0347] IAB-DU cell identifier (ie, iabDuCellId-AI): an identifier of an IAB-DU cell.

[0348] AI position within the DCI format (i.e., positionInDCI-AI): the position of the availability identifier (AI) index field within DCI format 2_5.

[0349] AvailabilityCombinations: A list including the following two pieces of information for availability combinations.

[0350] - Resource availability (i.e., resourceAvailability): indicates the resource availability of soft symbols included in one or more slots of the IAB-DU cell. The availability of soft symbols in one slot can be determined by referring to the values ​​in Table 17.

[0351] - Availability combination identifier (ie, availabilityCombinationId): indicates the mapping between resource availability (ie, resourceAvailability) and the AI ​​index field in DCI format 2_5.

[0352] As described above, in DCI format 2_5, one AI index field may indicate to the IAB-DU the availability of soft symbols in each slot included in a certain slot set. In this case, the slot set may start from the earliest slot among the slots of the IAB-DU that overlaps with the slot in which the IAB-MT detects the corresponding DCI format 2_5 on the time axis. In addition, the size of the slot set may be greater than or equal to the PDCCH monitoring periodicity of DCI format 2_5 given by the high-layer parameter SearchSpace. The AI ​​index field of DCI format 2_5 may include bits and can be mapped to one of the values ​​in Table 18. In this case, the maximum value of the AI ​​index (i.e., maxAIindex) may mean the maximum value in the provided availability combination identifier (i.e., availabilityCombinationId). Table 24 may indicate the mapping relationship between resource availability values ​​and soft symbol types within a time slot.

[0353] [Table 24]

[0354]

[0355] As described above, the upper-level IAB node including the IAB donor can instruct the lower-level IAB node whether to use soft symbols based on the contents of DCI format 2_5 and Table 16. On the other hand, such functions can be designed assuming that the IAB node operates in half-duplex mode. In other words, such functions can be designed primarily assuming that the MT and DU of the IAB node operate in a time division multiplexing (TDM) scheme or a time division duplexing (TDD) scheme.

[0356] In an exemplary embodiment of a communication system, F1AP signaling as shown in Table 25 may be used. Thus, the IAB node may report or transmit multiplexing information about the multiplexing capability between the IAB-DU of the IAB node (or, the cell of the gNB-DU) and the IAB-MT of the IAB node (or, the cell configured in the co-located IAB-MT) to the superior IAB node (e.g., the IAB donor or parent node). Referring to Table 25, the multiplexing information may include an IAB-MT cell list consisting of information about one or more IAB-MT cells. In this case, an IAB-MT cell list may include IAB-MT cell information according to the maximum number of serving cells (i.e., maxnoofServingCells). The nth IAB-MT cell information included in the IAB-MT cell list may include the NR cell identification (ID) information of the corresponding cell and information about whether the following four types of multiplexing are supported.

[0357] - DU_RX / MT_RX multiplexing: informs the IAB node whether it supports simultaneous reception in DU and MT.

[0358] -DU_TX / MT_TX multiplexing: informs the IAB node whether it supports simultaneous transmission in DU and MT.

[0359] - DU_TX / MT_RX multiplexing: informs the IAB node whether it can perform transmission in DU and reception in MT at the same time.

[0360] - DU_RX / MT_TX multiplexing: informs the IAB node whether it can perform reception in DU and transmission in MT at the same time.

[0361] [Table 25]

[0362]

[0363] According to Table 25, an IAB node can semi-statically report DU / MT multiplexing capabilities or whether it supports simultaneous DU / MT operation for each cell. However, whether an IAB node supports simultaneous DU / MT operation may depend entirely on the corresponding IAB node itself. Depending on the situation, an upper-level IAB node may not support dynamic or semi-static control of simultaneous DU / MT operation of a lower-level IAB node.

[0364] Figure 15 is a flow chart illustrating a first exemplary embodiment of a method for resource management of an IAB node in a communication system.

[0365] Figure 15A first exemplary embodiment of a method for managing IAB node resources is described, using the example of an IAB node determining whether to use IAB-DU resources. However, this is merely an example for ease of description, and the exemplary embodiments of the present disclosure are not limited thereto. For example, in the present disclosure, the configuration described for "whether to use IAB-DU resources" can also be similarly or identically applied to "whether to use IAB node resources," "whether to use IAB-MT resources," "whether to use DU / MT simultaneous operation resources," and so on.

[0366] Reference Figure 15 In accordance with the order in which the IAB-DU resources of the IAB node are determined to be used, the IAB node may identify whether the corresponding IAB-DU resources are available, and to determine whether the IAB-DU resources are used, may receive at least one of high-level IAB-MT resource configuration information and high-level IAB-DU resource configuration information from the upper-level IAB node (S1500). As an example, the high-level IAB-MT resource configuration information may include time slot configuration (i.e., downlink / uplink / flexible (DUF)) and symbol configuration information of the cell (or cell group) for the IAB-MT. As another example, the high-level IAB-DU resource configuration information may include time slot configuration (i.e., downlink / uplink / flexible (DUF)) and symbol configuration information of the cell (or cell group) for the IAB-DU.

[0367] The high-layer IAB-DU resource configuration information may include information on the type (i.e., hard, soft, or unavailable) of the IAB-DU resources configured by the upper-level IAB node. The high-layer IAB-DU resource configuration information may include a portion or all of the cell-specific / semi-static downlink signals and channels configured in the cell (or cell group) configured for the IAB-DU, such as (one or more) SSBs, the type 0-PDCCH CSS set for PDCCH configuration configured by SIB1, CSI-RS, etc. The high-layer IAB-DU resource configuration information may include a portion or all of the cell-specific / semi-static downlink signals and channels configured in the cell (or cell group) configured for the IAB-DU, such as PRACH, SR, etc.

[0368] In addition to the above-mentioned high-level configuration, the IAB node may receive at least one of a physical layer (L1 signaling) IAB-MT resource indicator and a physical layer IAB-DU resource indicator from the upper IAB node (S1510). As an example, the physical layer IAB-MT resource indicator may be a DCI format 2_0 including a slot format indicator of a cell (or cell group) configured for the IAB-MT. As another example, the physical layer IAB-DU resource indicator may be a DCI format 2_5 including soft resource AIs for the IAB-DU.

[0369] Finally, the IAB node may finally determine whether to use IAB-DU resources ( S1520 ) based on the higher layer signaling ( S1500 ) and the L1 signaling ( S1510 ).

[0370] Furthermore, it may not be possible to force all terminals to implement the same features. UE capability reporting can enable expensive terminals to implement a large number of features with high performance, and can enable low-cost terminals to implement a small number of features with low performance. UE capability reporting can ensure freedom of implementation for various scenarios, and when capability information is reported to the network, the base station can configure each function within the limits supported by each terminal. Certain functions may be mandated for all terminals to implement, and in this case, UE capability reporting for these mandatory functions may be omitted.

[0371] The terminal may report different UE capability values ​​for a function for each frequency band or for each duplex scheme. For example, the terminal may support a specific function for frequency range 1 (FR1, which means frequency bands below 6 GHz), but may report to the base station that the terminal does not support a specific function for frequency range 2 (FR2, which means frequency bands above 6 GHz). As another example, the terminal may report to the base station that a specific function is supported in a time division duplex (TDD) scheme but not in a frequency division duplex (FDD) scheme.

[0372] When the terminal performs UE capability reporting, the base station should follow (not violate) the content of the UE capability report when performing configuration, instruction or scheduling on the terminal. If the base station indicates to the terminal a configuration, instruction or scheduling that is contrary to the UE capability report, the terminal may ignore it.

[0373] Figure 16 is a timing diagram illustrating an exemplary embodiment of a UE capability reporting procedure in a communication system.

[0374] refer to Figure 16 In the UE capability report process, when the terminal is in RRC connected mode (i.e., RRC_CONNECTED state), the base station may send a UE capability report request signal to the terminal through the high-layer parameter UECapabilityEnquiry (S1600). In this case, the network may refer to only the UE capability report after the access stratum (AS) is securely activated, and may not resend or report the UE capability report to the core network (CN) before the AS is securely activated. Upon receiving the UE capability report request signal, the terminal may edit the UE capability information according to a specific procedure and report it to the base station through a UE capability information signal (e.g., UECapabilityInformation) (S1610).

[0375] The specific process for compiling the UE capability information signal may include a process of generating at least one of a list of (one or more) frequency bands or (one or more) frequency band combinations (BCs) supported by the terminal (i.e., supportedBandCombinationList), feature set (FS) information related to feature sets supported by the terminal, or feature set combination (FSC) information related to feature set combinations supported by the terminal. For example, when a base station requests a UE capability report from a terminal to obtain information about (one or more) frequency bands or (one or more) frequency band combinations supported by the terminal, the terminal may report which frequency band(s) it supports for each radio access technology (RAT). To this end, the base station may set the RAT type in a UE RAT capability report request signal (e.g., UE-CapabilityRAT-Request) included in a UE RAT capability report request list signal (e.g., ue-CapabilityRAT-RequestList) as a higher layer message to one of "nr," "eutra-nr," "eutra," and "eutra-fdd." This may mean that the base station may request a UE capability report for one or more RATs or RAT combinations from the terminal, and in this case, the terminal may respond to each request for a list of supported frequency bands for multiple RATs or RAT combinations. For example, if the RAT type is set to 'nr', the terminal may include a list of frequency bands or frequency band combinations to which NR-DC is applicable in the UE capability report. As another example, if the RAT type is set to 'eutra-nr', the terminal may include a list of frequency bands or frequency band combinations applicable to multi-RAT DC (MR-DC) such as EN-DC, NGEN-DC, NE-DC, etc. in the UE capability report. In addition, when the base station requests a UE capability report, the base station may provide the terminal with a list of frequency bands for which the terminal determines whether to provide support through the higher-layer parameter frequencyBandListFilter. For the frequency bands included in the higher-layer parameter frequencyBandListFilter, the terminal may determine candidate frequency band combinations by considering "predetermined RAT types supported for each frequency band," "information about the RAT types requested by the base station," and the like, and may include the candidate frequency band combinations in the UE capability report.

[0376] Figure 17a and Figure 17b is a conceptual diagram for describing a first exemplary embodiment of a user plane protocol stack structure and a control plane protocol stack structure in a communication system.

[0377] Reference Figure 17a and Figure 17b, a radio interface protocol stack or a radio interface protocol stack structure 1700 and 1750 may be defined in a radio connection portion between communication nodes. For example, the radio interface protocol stack may be divided into a vertically configured physical layer, a data link layer, a network layer, and the like.

[0378] The radio interface protocol stack can be divided into a user plane protocol stack 1700 and a control plane protocol stack 1750. Here, the control plane may be a plane for transmitting control signals. The control signals may be referred to as signaling signals. The user plane may be a plane for transmitting user data.

[0379] Reference Figure 17a , the communication system may include a terminal 1710 and a base station 1720. The terminal 1710 may be referred to as a user equipment (UE). The base station 1720 may correspond to an eNB, a gNB, etc. The terminal 1710 and the base station 1720 may be based on Figure 17a to perform mutual data signal transmission / reception using the user plane protocol stack structure 1700 shown in FIG.

[0380] In the user plane air interface protocol stack structure 1700 of the communication system, the terminal 1710 and the base station 1720 may include PHY layers 1711 and 1721 included in L1, MAC layers 1712 and 1722 included in L2, RLC layers 1713 and 1723, packet data convergence protocol (PDCP) layers 1714 and 1724, service data adaptation protocol (SDAP) layers 1715 and 1725 included in L3, and the like.

[0381] Reference Figure 17b , the communication system may include a terminal 1760 and a base station 1770. The terminal 1760 and the base station 1770 may be based on Figure 17b The control plane protocol stack structure 1750 shown in FIG. 1 is used to perform mutual control signal transmission / reception.

[0382] In the control plane protocol stack structure 1750 of the communication system, the terminal 1760 and the base station 1770 may include PHY layers 1761 and 1771 included in L1, MAC layers 1762 and 1772 included in L2, RLC layers 1763 and 1773, PDCP layers 1764 and 1774, and RRC layers 1765 and 1775 included in L3, etc.

[0383] The communication system may also include an access and management mobility function (AMF) 1780. In the control plane protocol stack structure 1750, the terminal 1760 and the AMF 1780 may include non-access stratum (NAS) layers 1766 and 1786. The base station 1770 may not include the NAS layer. In other words, in the control plane protocol stack structure 1750, the NAS layer of the base station 1770 may be transparent.

[0384] 5G communication systems may provide technologies for improving wireless coverage and / or reducing network configuration costs. For example, 5G communication systems may provide integrated access and backhaul (IAB) technology, which provides wireless backhaul / fronthaul that can coexist with the radio access network and repeater technology that provides low-cost coverage in shadow areas.

[0385] In the 5G NR communication system, the IAB feature can support flexible and dense wireless backhaul links for each cell without wired network support. Figure 17a and Figure 17b The protocol structure of may be appropriately changed and applied depending on a situation when carrier aggregation (CA) or dual connectivity (DC) is applied.

[0386] Figure 18a is a conceptual diagram for describing a user plane protocol structure for carrier aggregation (CA) in a base station of a communication system, and Figure 18b is a conceptual diagram for describing a user plane protocol structure for dual connectivity (DC) in a base station of a communication system.

[0387] Reference Figure 18a and Figure 18b , a radio interface protocol stack or radio interface protocol stack structures 1800 and 1850 may be defined in a radio connection portion between communication nodes. For example, in a radio connection portion between communication nodes, a user plane protocol stack structure 1800 for carrier aggregation (CA) may be defined. Alternatively, in a radio connection portion between communication nodes, a user plane protocol stack structure 1850 for dual connectivity (DC) may be defined.

[0388] Reference Figure 18a , the communication system may include a base station 1820. The base station 1820 may correspond to an eNB, a gNB, or the like. A base station 1800 applying carrier aggregation may operate two or more PHY layers 1821-1 and 1821-2 to perform transmission and reception on two or more component carriers (CCs). In this case, each of the PHY layers 1821-1 and 1821-2 may be connected to one MAC layer 1822 via an independent hybrid automatic repeat request (HARQ) entity for each CC (or each serving cell).

[0389] Connections with higher layers (such as RLC 1823, PDCP 1824, and SDAP 1825) can be based on Figure 17a and Figure 17b This is because CA assumes that multiple carriers are supported at a single transmission point, and when CA is operated at multiple transmission points, the base station 1800 may require a backhaul with a delay of 0 ms between transmission points for a single MAC entity.

[0390] Reference Figure 18b , the communication system may include a master cell group (MCG 1870) and a secondary cell group (SCG) 1880. The cells or base stations of the MCG 1870 and the SCG 1880 may configure DC with a lower-level node (such as a terminal) based on a user plane protocol stack structure 1850 for DC. In the user plane radio interface protocol stack structure 1850 for DC, the cell or base station of the MCG 1870 may include a PHY layer 1871 included in L1, a MAC layer 1872, an RLC layer 1873, and a PDCP layer 1874 included in L2, an SDAP layer 1875 included in L3, and the like. At the same time, the cell or base station of the SCG 1880 may include a PHY layer 1881 included in L1, a MAC layer 1882 and an RLC layer 1883 included in L2, and the like.

[0391] A base station applying DC may use two or more transmission nodes 1870 and 1880 to perform transmission and reception in two or more CCs. In this case, the transmission nodes may include a first node (i.e., a master node, a master gNB, or an MgNB) 1870 that guides a connection with the 5GC and the remaining nodes (i.e., (one or more) second nodes, (one or more) secondary nodes, (one or more) secondary gNBs, or (one or more) MgNBs) 1880 that support secondary connections with the 5GC.

[0392] When multi-RAT DC, such as LTE-NR or NR-LTE, is applied, the first node 1870 and the remaining nodes 1880 may also be referred to as MeNBs or SeNBs. In the case of DC, since a backhaul structure with a delay greater than 0 (e.g., 3 ms, etc.) is assumed, unlike CA, the RLC layers 1873 and 1883, MAC layers 1872 and 1882, and PHY layers 1871 and 1881 separated between the MgNB 1870 and the SgNB 1880 may be supported.

[0393] For example, this may mean that separate data for the MeNB 1870 and the SeNB 1880 can be scheduled independently of each other in the PDCP layer 1874. In the above description, the structure in which PDCP or a higher layer is a shared DC (i.e., PDCP or a higher layer is used as a single entity when operating DC) is merely an example of DC operation. In actual applications, DC and CA are not mutually exclusive and can be applied simultaneously.

[0394] As another example, the MgNB 1870 may configure a cell group consisting of one or more CCs, and the cell group may be referred to as a primary cell group (MCG). Similarly, the SgNB 1880 may configure a cell group consisting of one or more CCs, and the cell group may be referred to as a secondary cell group (SCG). In this case, multiple CCs within a cell group (i.e., within an MCG or SCG) may be operated using the aforementioned CA protocol structure.

[0395] An exemplary embodiment of a communication system supporting 5G wireless communication may support the following various DC types.

[0396] □EUTRA-NR DC (EN-DC): DC in which MCG is configured based on 4G Evolved Universal Terrestrial Radio Access (E-UTRA) and SCG is configured based on 5G NR. Here, the control plane of MCG can be configured through the 4G core (ie, evolved packet core (EPC)).

[0397] Next Generation RAN E-UTRA-NR DC (NGEN-DC): DC in which MCG is configured based on E-UTRA and SCG is configured based on NR. In this case, the control plane of MCG can be configured through the 5G core (ie, the next generation core (NGC)).

[0398] □NR-EUTRA DC (NE-DC): DC in which MCG is configured based on NR and SCG is configured based on E-UTRA.

[0399] □NR DC: DC of both MCG and SCG configured based on NR.

[0400] The base station may use one or more higher-layer parameters to perform DC-related configuration for a terminal (i.e., a UE, a MT, etc.). For example, the higher-layer parameters used by the base station for DC-related configuration may include at least some of CellGroupConfig, SpCellConfig, ReconfigurationWithSync, and SCellConfig. The higher-layer parameter CellGroupConfig may be the same as or similar to that shown in Table 26 and Table 27.

[0401] [Table 26]

[0402]

[0403] [Table 27]

[0404]

[0405]

[0406] In addition, the high-level parameters SpCellConfig can be the same as or similar to the parameters shown in Table 28.

[0407] [Table 28]

[0408]

[0409] In addition, the higher layer parameter ReconfigurationWithSync can be the same or similar to that shown in Table 29.

[0410] [Table 29]

[0411]

[0412]

[0413] In addition, the high-level parameters SCellConfig may be the same as or similar to the parameters shown in Table 30.

[0414] [Table 30]

[0415]

[0416] In addition, the cell-specific configuration of the serving cell configured as the SpCell or SCell in the MCG or SCG may be performed with reference to the higher-layer parameter ServingCellConfigCommon. The higher-layer parameter ServingCellConfigCommon may be the same as or similar to that shown in Table 31.

[0417] [Table 31]

[0418]

[0419]

[0420] In addition, the UE-specific configuration or cell-specific configuration of the serving cell configured as the SpCell or SCell in the MCG or SCG may be performed with reference to the higher-layer parameter ServingCellConfig. The higher-layer parameter ServingCellConfig may be the same as or similar to the parameters shown in Table 32 and Table 33.

[0421] [Table 32]

[0422]

[0423] [Table 33]

[0424]

[0425]

[0426] In addition, the cell-specific configuration of the serving cell configured as the SpCell or SCell within the MCG or SCG may be performed with reference to the higher-layer parameter ServingCellConfig. The higher-layer parameter ServingCellConfig may be the same as or similar to the following.

[0427] DC or CA can be defined within a specific frequency resource. DC or CA can operate within a frequency band (e.g., a 4G band or a 5G band) that includes one or more CCs. DC or CA operating within a frequency band may be referred to as "intra-band DC" or "intra-band CA." On the other hand, DC or CA may be applied across one or more frequency bands, or across a frequency band combination configured as a combination of one or more frequency bands. DC or CA applied across one or more frequency bands or a frequency band combination may be referred to as "inter-band DC" or "inter-band CA."

[0428] In addition, DC or CA can operate within a CC. DC or CA operating within a CC may be referred to as "intra-carrier DC" or "intra-carrier CA." On the other hand, DC or CA may be applied across one or more CCs. DC or CA applied across one or more CCs may be referred to as "inter-carrier DC" or "inter-carrier CA."

[0429] Meanwhile, DC or CA can operate within a single frequency range (FR). DC or CA applied within a single FR is referred to as "intra-FR DC" or "intra-FR CA." On the other hand, DC or CA can be applied across one or more FRs. For example, some cell groups or CCs may exist in FR1, while the remaining cell groups or CCs may be configured to exist in FR2. They can be applied across one or more FRs. DC or CA can be referred to as "inter-FR DC" or "inter-FR CA."

[0430] Depending on how far or close the frequency axis distance between one or more CCs or serving cells is, intra-FR DC / CA, inter-FR DC / CA, intra-band DC / CA, inter-band DC / CA, intra-carrier DC / CA, inter-carrier DC / CA, etc. can be configured. The hardware of a communication node (such as a terminal or base station) can be implemented differently depending on which combination of DC / CA should be supported. Hereinafter, an exemplary embodiment of a hardware implementation of a communication node will be described using an implementation for supporting intra-band CA or inter-band CA as an example. However, this is merely an example for ease of description, and exemplary embodiments of the present disclosure are not limited thereto.

[0431] In all exemplary embodiments of the present disclosure described below, for ease of description, six types of DU / MT simultaneous operation types are defined as follows. Here, it can be assumed that the simultaneously operating DU and MT are co-located (i.e., included in or regarded as one IAB node).

[0432] (1) Case A (DU / MT Tx Both): Case A may correspond to a case where IAB-DU and IAB-MT perform transmission simultaneously at the same time (symbol). In other words, IAB-DU may transmit a downlink signal, and IAB-MT may transmit an uplink signal.

[0433] (2) Case B (DU / MT Rx Both): Case B may correspond to a case where the IAB-DU and IAB-MT perform reception simultaneously at the same time (symbol). In other words, the IAB-DU may receive uplink signals, and the IAB-MT may receive downlink signals.

[0434] (3) Case C (DU Rx / MT Tx): Case C may correspond to a case where the IAB-DU performs reception and the IAB-MT performs transmission at the same time (symbol). In other words, the IAB-DU may receive an uplink signal and the IAB-MT may transmit an uplink signal.

[0435] (4) Case D (DU Tx / MT Rx): Case D may correspond to a case where the IAB-DU performs transmission and the IAB-MT performs reception at the same time (symbol). In other words, the IAB-DU may transmit a downlink signal and the IAB-MT may receive a downlink signal.

[0436] (5) Case E (DU / MT FDM Required): Case E may correspond to a situation where the time-frequency resources of the IAB-DU and the time-frequency resources of the IAB-MT need to be frequency-division multiplexed (FDM) during simultaneous DU / MT operation. Case E may be required when the interference control capability of the DU or MT is relatively limited.

[0437] (6) Case F (Case F: DU / MT SDM Required): Case F may correspond to a situation where the time-frequency resources of the IAB-DU and the time-frequency resources of the IAB-MT need to be time-division multiplexed (TDM) during simultaneous DU / MT operation. Case F may be supported if the interference control capability of the DU or MT is relatively good.

[0438] The IAB node (or IAB-DU to IAB-MT) according to the exemplary embodiment of the present disclosure can support at least one of the six types of cases A to F. In addition, the IAB node according to the exemplary embodiment of the present disclosure can report information related to the supported simultaneous operations or the combination of supported types to the upper-level IAB node (IAB donor, etc.) or the core network (CU, etc.). The example in Table 16 above can be an example thereof. In addition, the upper-level IAB node or CU can indicate which simultaneous operation type or combination of types is applied to which time-frequency resource of the IAB node, and the IAB node reports the supported simultaneous operation type or combination of supported types. This indication can be configured through high-layer signaling, or can be dynamically indicated through L1 / L2 signaling.

[0439] Figure 19a This is a conceptual diagram for describing a situation where both the MT and DU of an IAB node are in the transmission mode. Figure 19b This is a conceptual diagram for describing a situation where both the MT and DU of an IAB node are in receiving mode. Figure 19c This is a conceptual diagram for describing a situation where the MT of an IAB node is in a transmitting mode and its DU is in a receiving mode. Figure 19d is a conceptual diagram for describing a case where the MT of an IAB node is in a receiving mode and its DU is in a transmitting mode.

[0440] In reference Figures 19a to 19d Previously, IAB nodes could support at least some of the six operating modes described above. Figures 19a to 19d In the example of , it is assumed that the IAB node supports four cases: case A 1900 , case B 1905 , case C 1910 , and case D 1920 among the six cases exemplified above.

[0441] First, refer to Figure 19a In case A1900, both MT and DU are in transmit mode. Here, MT may refer to IAB-MT, and DU may refer to IAB-DU. Figure 19a In the , DU can send downlink signals, and MT can send uplink signals. Figure 19a As shown in FIG, since the DU transmits a downlink signal, the DU can perform downlink transmission at a higher transmission power than the MT that transmits an uplink signal. Figure 19a In FIG, the intensity of the transmission power is represented by the thickness of the arrow. Therefore, it shows the case where the DU has a higher transmission power.

[0442] Reference Figure 19b In case B 1905, both MT and DU are in receive mode. Here, MT may refer to IAB-MT and DU may refer to IAB-DU. Figure 19bIn , DU can receive uplink signals, and MT can receive downlink signals. Figure 19b In the figure, the strength of the received power is also represented by the thickness of the arrow, but the difference in the strength of the received signals may be small, or the strength of the received signals may be the same.

[0443] Reference Figure 19c In case C 1910, MT is in transmit mode and DU is in receive mode. Here, MT may refer to IAB-MT and DU may refer to IAB-DU. Figure 19c In the example, DU can receive uplink signals and MT can send uplink signals. The strength of the received power is indicated by the thickness of the arrow. Figure 19c As shown in FIG, it shows the case where the transmission power of the MT is greater than the reception power of the DU.

[0444] Reference Figure 19d In case D 1910, the MT is in receive mode and the DU is in transmit mode. Here, MT may refer to IAB-MT and DU may refer to IAB-DU. Figure 19d In the DU, the DU can send downlink signals and the MT can receive downlink signals. Figure 19d As shown in , the strength of the received power is represented by the thickness of the arrow. Figure 19d As shown in FIG, it shows the case where the transmission power of DU is greater than the reception power of MT.

[0445] exist Figures 19a to 19d In the scenario shown, the IAB node may need to measure and report uplink-downlink interference (i.e., cross-link interference (CLI)) based on DU / MT transmission and reception operations. For example, when the IAB node operates according to scenario A1900, the MT's transmission operation (i.e., uplink transmission, because the signal is transmitted from the MT to the DU) and the DU's transmission operation (i.e., downlink transmission, because the signal is transmitted from the DU to the MT or UE) may be performed simultaneously. Therefore, CLI may occur due to the simultaneous operations. In this case, since both the DU and the MT are performing transmissions, CLI measurements may be performed by one of the DUs, MTs, or UEs located at different locations.

[0446] On the other hand, when the IAB node operates according to case B 1905, since the MT's reception operation (i.e., downlink reception, because a signal is transmitted from the DU to the MT) and the DU's reception operation (i.e., uplink reception, because a signal is transmitted from the UE to the DU) are performed simultaneously, CLI 1920 may occur. In this case, the technical specification needs to support measurement and reporting of CLI 1920, which is interference caused by the uplink signal received at the DU to the MT receiving the downlink signal.

[0447] Due to the simultaneous operation of dynamic TDD, full-duplex, and IAB DU / MT, the 5G NR system may experience UL-DL mutual interference (CLI). Therefore, in order to prevent the performance degradation caused by CLI, it is necessary to support CLI measurement and reporting functions.

[0448] The two CLI measurement methods of the 5G NR Rel-16 NR standard are as follows.

[0449] 1) CLI-Received Signal Strength Indicator (CLI-RSSI) measurement

[0450] 2) SRS Reference Signal Received Power (SRS-RSRP) Measurement

[0451] Layer 3 (L3) filtering can be applied to both of the above methods, and measurement and reporting can be performed based on time / frequency resources according to the detailed configuration parameters in Tables 25 and 26 below. In addition, the reporting of measurement values ​​supports event-triggered reporting and periodic reporting, and measurement and reporting can be applied when operating NR multi-cell (such as CA / DC).

[0452] Table 34 is an example of configuring parameters related to SRS-RSRP measurement.

[0453] [Table 34]

[0454]

[0455]

[0456] Table 35 is an example of configuring parameters related to CLI-RSSI measurement.

[0457] [Table 35]

[0458]

[0459]

[0460] 3GPPP TS38.473 provides F1 Application Protocol (F1AP) signaling, as shown in Table 36 below.

[0461] The gNB-DU may report / deliver information to be considered in CLI mitigation to the gNB-CU (or vice versa) via F1AP signaling as shown in Table 36. Here, CLI mitigation may include both CLI measurement / reporting and other implementations.

[0462] Here, information to be considered in CLI mitigation may be delivered through 'expected TDD DL-UL configuration', and the 'expected TDD DL-UL configuration' may include information such as SCS, CP, and TDD UL-DL slot configuration.

[0463] [Table 36]

[0464]

[0465] Referring to Table 36, "Expected TDD DL-UL Configuration" may include a slot configuration list including information about DL / UL symbols used for one or more slots, i.e., TDD DL-UL mode information. If a slot includes both (one or more) DL symbols and (one or more) UL symbols, the number of symbols from the beginning of the slot that are DL symbols and the number of symbols immediately before the end of the slot that are UL symbols may be notified using the parameters "Number of DL Symbols" and "Number of UL Symbols," respectively.

[0466] In addition, TS 38.473 of the 3GPP standard may provide F1AP signaling as shown in Tables 37 and 38 below. In this way, the IAB node can transmit resource configuration information (gNB-DU cell resource configuration) for (one or more) cells supported by the gNB-DU of the IAB node to the upper IAB node (e.g., IAB donor, parent node, gNB-CU) or neighbor IAB node. In other words, the IAB node can report / transmit information about TDD / FDD resource parameters for each activated cell to the upper IAB node or neighbor IAB node through F1AP signaling.

[0467] [Table 37]

[0468]

[0469] [Table 38]

[0470]

[0471]

[0472] Referring to Tables 37 and 38, the resource allocation information may include downlink / uplink / flexible (DUF) configuration information for a list of one or more time slots that repeat with a specific period (i.e., a DUF transmission period). In this case, "maxNoofDUFslots" in Table 28 may be defined as 320 as the maximum number of time slots within 10ms, and "maxNoofHSNAslots" may be defined as 5120 as the maximum number of H / S / NA time slots within 160ms.

[0473] The number of downlink symbols and the number of uplink symbols in a time slot can be set by the parameters "number of downlink symbols" and "number of uplink symbols", respectively. In addition, when the permutation parameter is set to "DFU", (one or more) downlink symbols may be arranged at the beginning of the time slot, and (one or more) uplink symbols may be arranged at the end of the time slot. On the other hand, when the permutation parameter is set to "UFD", (one or more) uplink symbols may be arranged at the beginning of the time slot, and (one or more) downlink symbols may be arranged at the end of the time slot. Other parameters and detailed configuration values ​​are shown in Table 30.

[0474] In the GPP Rel-17 specification, in order to support the simultaneous operation of IAB-DU and IAB-MT, the HSNA time slot configuration in Table 30 is specified to be extended to the frequency domain. In other words, the 3GPP Rel-17 specification stipulates that the HSNA time slot configuration can be extended to the frequency domain, so that IAB-DU resources and IAB-MT resources can support FDM or SDM as well as TDM. The base station or upper node can configure or indicate one or more RB sets or RB set groups to which the frequency domain HSNA configuration will be applied. In addition, the base station or upper node can indicate to the IAB-MT of the subordinate node the availability of one or more frequency domain soft resources for one or more RB sets and / or RB set groups within a specific time resource. This indication can be conveyed to the IAB-MT of the subordinate node via an extended form of the availability indicator in DCI format 2_5.

[0475] In this case, when the IAB node receives DCI format 2_5, the IAB node may use the RB set, RB set group, and / or time slot indicated as available by the availability indicator as an IAB-DU resource of the IAB node.

[0476] In addition, in 3GPP Rel-17, the following functions have been introduced to support not only TDM of IAB-DU and IAB-MT resources but also FDM or SDM during simultaneous operation of IAB-DU and IAB-MT. For example, a transmission timing adjustment method, FDM through frequency axis resource allocation, additional PDSCH power adjustment (i.e., DL Tx power adjustment) in addition to PDSCH power configuration through the higher-layer parameter powerControlOffset, and expected uplink power spectral density (PSD) reporting have been introduced. These functions are summarized below.

[0477] The gNB may determine the desired timing advance (TA) configuration and provide it to the UE / IAB-MT. The UE / IAB-MT may use the provided TA to determine the uplink transmit timing relative to the downlink receive timing observed by the UE / IAB-MT.

[0478] IAB nodes may support additional modes for uplink timing.

[0479] - The IAB-MT may use the provided TA and the provided additional offset to determine the uplink transmission timing and facilitate multiplexing of IAB-MT reception / IAB-DU reception by the upper node.

[0480] - The IAB-MT can facilitate multiplexing of IAB-MT transmissions / IAB-DU transmissions by matching its uplink transmission timing with the IAB-DU downlink transmission timing.

[0481] The IAB node uplink timing mode may be indicated to the upper node via MAC-CE.

[0482] If the IAB-DU and IAB-MT of the IAB node are subject to half-duplex constraints, normal transmission / reception on the other side may not be guaranteed during transmission / reception on one side, and vice versa. For example, the case where they are deployed and operated at the same frequency can be an example. When the IAB node supports enhanced frequency or spatial multiplexing capabilities, (one or more) additional multiplexing modes may be supported. For example, (one or more) multiplexing modes such as IAB-MT receive / IAB-DU receive, IAB-MT send / IAB-DU send, IAB-MT receive / IAB-DU send, and IAB-MT send / IAB-DU receive may be supported. The IAB node may report the duplex constraints between the IAB-MT and the IAB-DU via F1AP signaling. The IAB node may indicate via F1AP signaling whether the enhanced multiplexing operation requires FDM.

[0483] The scheduler of the IAB-DU or IAB-Donor-DU may follow the gNB-DU resource configuration received via F1AP, which defines the use of scheduling resources to account for the above duplexing constraints.

[0484] Resource configuration can assign hard, soft, or unavailable type to each symbol of each DU cell.

[0485] Transmission / reception may be possible in symbols configured as "hard," and scheduling may not occur in symbols configured as "unavailable," except in special circumstances. For symbols configured as "soft," scheduling may occur conditionally based on an explicit availability indicator from a higher-level node via DCI format 2_5 or an implicit availability determination by the IAB node. The implicit availability determination may be made by the IAB node based on whether the operation of the IAB-DU will affect the co-located IAB-MT(s).

[0486] Resource configuration may be shared between neighboring IAB nodes and the IAB donor to facilitate interference management, dual connectivity, and enhanced multiplexing.

[0487] To facilitate transitions from IAB-MT to IAB-DU operation and vice versa, guard symbols may be used to overcome potential misaligned symbol boundaries between the IAB-MT and IAB-DU domains (e.g., where the IAB-MT receive boundary is misaligned with the IAB-DU transmit boundary). Specifically, the IAB node may indicate the desired number of guard symbols to the parent node, and the parent node may indicate to the IAB node the number of guard symbols actually provided for a particular transition.

[0488] An IAB node that supports enhanced multiplexing capabilities (i.e., IAB-MT reception / IAB-DU reception, IAB-MT transmission / IAB-DU transmission, IAB-MT reception / IAB-DU transmission, IAB-MT transmission / IAB-DU reception) may provide information about an upper-level node via MAC-CE to facilitate scheduling of enhanced multiplexing operations by the IAB node, as described below.

[0489] - Recommendation of (one or more) IAB-MT transmit / receive (Tx / Rx) beams

[0490] -Expected IAB-MT send PSD range

[0491] - Parent node's expected IAB-DU transmit power adjustment

[0492] - Requirements for the uplink transmission timing mode of IAB-MT

[0493] Therefore, the parent node may provide MAC-CE information to the IAB node to facilitate enhanced multiplexing in the IAB node and / or the parent node:

[0494] -Restricted IAB-DU Tx beam

[0495] - Actual parent node IAB-DU Tx power adjustment

[0496] -IAB-MT uplink transmission timing mode

[0497] In addition, in the 5G NR system, the base station (or a relay station such as an IAB node) can control the UE or MT to use specific time / frequency resources to report channel state information (CSI). For the sake of convenience of description, relay stations with general base station functions (such as eNB and gNB) and relay stations with partial or full base station functions (such as IAB nodes (e.g., IAB-DU, IAB-MT)) and relays will be collectively referred to as relay stations. In addition, in the following description, for the sake of convenience, various types of terminals (such as UE equipped with a mobile equipment (ME) and a UMTS user identity module (USIM), ME equipped with a mobile terminal (MT) and terminal equipment (TE), MT equipped with a mobile communication function unit) will all be collectively referred to as terminals.

[0498] CSI may refer to all or part of the channel quality indicator (CQI), precoding matrix indicator (PMI), CSI-RS resource indicator (CRI), SS / PBCH block resource indicator SSBRI, layer indicator (LI), rank indicator (RI), layer 1 reference resource received power (L1-RSRP), or layer 1 signal-to-noise and interference ratio (L1-SINR). For CSI reporting, the terminal may receive N (N is 1 or greater) report configurations (CSI-ReportConfig), M (M is 1 or greater) resource configurations (CSI-ResourceConfig), and a trigger configuration including a list of one or more trigger states (e.g., CSI-AperiodicTriggerStateList or CSI-SemiPersistentOnPUSCH-TriggerStateList) from the higher layer of the base station.

[0499] Each reporting configuration CSI-ReportConfig may consist of some or all of the high-level parameters shown in Tables 39 to 41 below.

[0500] [Table 39]

[0501]

[0502] [Table 40]

[0503]

[0504]

[0505] [Table 41]

[0506]

[0507] Each resource configuration CSI-ResourceConfig may be configured with some or all of the high-level parameters shown in Tables 42 to 44 below.

[0508] [Table 42]

[0509]

[0510]

[0511] [Table 43]

[0512]

[0513] [Table 44]

[0514]

[0515] The trigger configuration CSI-AperiodicTriggerStateList or CSI-SemiPersistentOnPUSCH-TriggerStateList may be configured with some or all of the higher layer parameters as shown in Table 45 and Table 46 below.

[0516] [Table 45]

[0517]

[0518] [Table 46]

[0519]

[0520]

[0521] In 5G NR, the base station can configure the terminal to derive the CQI according to one of Tables 47 to 50.

[0522] [Table 47]

[0523]

[0524] [Table 48]

[0525]

[0526]

[0527] [Table 49]

[0528]

[0529] [Table 50]

[0530]

[0531]

[0532] In this case, a combination of a modulation scheme and a transport block size that satisfies the following conditions may correspond to one of the CQI indexes in Tables 47 to 50 above:

[0533] Condition 1: The combination is indicated for PDSCH transmission within the CSI reference resource.

[0534] Condition 2: The modulation scheme is indicated by a CQI index.

[0535] Condition 3: When a combination of transport block size and modulation scheme is applied to a reference resource, the effective channel code rate calculated based on it is closest to the code rate indicated by the CQI index. In this case, if two or more combinations of modulation scheme and transport block size are calculated to be closest to the code rate indicated by the CQI index, only the combination configured with the smallest transport block size among the combinations may be valid.

[0536] When the high-level parameter timeRestrictionForChannelMeasurements is set to "Not Configured" in the reporting configuration and time domain measurement restrictions are not applied to the channel measurement resources (CMRs) of the reporting configuration, the terminal may need to perform channel measurements by considering only the (one or more) non-zero power (NZP) CSI-RS resources among the NZP CSI-RS resources included in the CMR that are located at the same time as the CSI reference resource or before the CSI reference resource for the calculation of the CSI to be reported in uplink time slot n.

[0537] When the higher-layer parameter timeRestrictionForChannelMeasurements is set to "Configuration" in the reporting configuration and the time domain measurement restriction is applied to the CMR of the reporting configuration, the terminal may need to perform channel measurement for the calculation of the CSI to be reported in uplink time slot n by considering only the (one or more) nearest NZP CSI-RS resources (opportunities) included in the CMR that are at the same time as the CSI reference resource or before the CSI reference resource.

[0538] When the high-level parameter timeRestrictionForInterferenceMeasurements is set to "Not Configured" in the reporting configuration and the time domain measurement restriction is not applied to the interference measurement resources (IMR) of the reporting configuration, the terminal may need to perform interference measurement for the calculation of the CSI to be reported in uplink time slot n by considering only the NZP CSI-RS resources and / or (one or more) resources among the CSI-IM included in the IMR that are at the same time as the CSI reference resource or before the CSI reference resource.

[0539] When the higher-layer parameter timeRestrictionForInterferenceMeasurements is set to "Configuration" in the reporting configuration and the time domain measurement restriction is applied to the IMR of the reporting configuration, the terminal may need to perform interference measurement for the calculation of the CSI to be reported in uplink time slot n by considering only the NZP CSI-RS resources and / or CSI-IM included in the IMR that are at the same time as the CSI reference resource or the closest time before the CSI reference resource.

[0540] The CSI reference resources in a serving cell can be defined as follows:

[0541] • In the frequency domain, the CSI reference resources may be defined as the downlink PRB groups in the frequency band associated with the derived CSI.

[0542] In the time domain, the CSI reference resource for CSI reported in uplink time slot n' may be defined as the downlink time slot In this case, n CSI_ref , K offset 、 and It can be set or indicated by high-level signaling such as RRC and MAC CE, or can be derived by a predetermined rule. For example, the base station can perform K offset As another example, when a single CSI-RS or SSB resource is configured as a CMR for periodic CSI reporting or semi-persistent CSI reporting, the terminal may assume that n CSI_ref is greater than or equal to The minimum value of the integer value indicating the valid downlink time slot. When multiple CSI-RS or SSB resources are configured as CMRs for periodic CSI reporting or semi-persistent CSI reporting, the terminal may assume that n CSI_ref is greater than or equal to As another example, for an aperiodic CSI report indicated by DCI to be reported in the same time slot as the CSI request, the terminal may assume that n CSI_ref The same time slot as the CSI request is the valid downlink time slot. For other non-periodic CSI reports, the terminal may assume that N CSI_ref The minimum positive integer that satisfies the separately defined delay requirement Z'. When a terminal uses periodic or semi-persistent CSI-RS / CSI-IM / SSB resources for aperiodic CSI reporting based on channel or interference measurement reports, if the last symbol of the periodic or semi-persistent CSI-RS / CSI-IM / SSB resource is within the delay requirement Z' from the first OFDM symbol for sending the aperiodic CSI report (i.e., when Z' or more symbols cannot be guaranteed from the last OFDM symbol for receiving the CSI-RS / CSI-IM / SSB resource to the first OFDM symbol for the aperiodic CSI report), the terminal may not perform measurements on the CSI-RS / CSI-IM / SSB resource.

[0543] A timeslot that meets the following conditions within a serving cell may be considered as a valid downlink timeslot.

[0544] • Condition 1: A timeslot includes at least one downlink (D) or flexible (F) symbol configured by higher layer signaling.

[0545] Condition 2: A time slot not included in the measurement gap configured for the terminal.

[0546] When there is no valid downlink timeslot for CSI reference resources configured for CSI reporting within the serving cell, CSI reporting for the serving cell may be omitted in uplink timeslot n′.

[0547] When configured to report CQI, the terminal may assume the following in order to derive the CQI and associated RI and PMI within the CSI reference resources.

[0548] • Item 1: The first two OFDM symbols are used to send control signal(s).

[0549] Item 2: The number of symbols used for PDSCH and DMRS is 12.

[0550] • Item 3: The same BWP, subcarrier spacing, and CP length as configured for PDSCH reception.

[0551] • Item 4: The same bandwidth as configured for CQI reporting.

[0552] Item 5: There are no REs for SSB, NZP CSI-RS, and ZP CSI-RS.

[0553] Item 6: Redundancy version (RV) 0.

[0554] • Item 7: The ratio between PDSCH EPRE and CSI-RS EPRE follows the higher layer configuration (Pc, powerControlOffset).

[0555] Item 8: For DMRS mode, refer to the parameter maxLength and the configuration dmrs-AdditionalPosition in the configuration DMRS-DownlinkConfig.

[0556] • Item 9: There is no DMRS in the PDSCH symbol.

[0557] • Item 10: Assume that the PRB bundling size is 2 PRBs.

[0558] Item 11: The relationship of the following Equation 5 is satisfied between the PDSCH signal transmitted through the PDSCH antenna ports [1000, ..., 1000+v-1] for the v-layer and the signal transmitted through the CSI-RS antenna ports [3000, ..., 3000+P-1].

[0559] [Equation 5]

[0560]

[0561] Here, W(i) is the precoding matrix indicated by PMI, and P is the number of CSI-RS ports in the CSI-RS resource.

[0562] Item 12: One or more CSI-RS resources configured for a terminal may be divided into one or more (two) resource groups and one or more (N) resource pairs for purposes such as multi-TRP. In this case, each of the M1 resources in the first resource group may be associated with a CSI-RS resource indicator (CRI), each of the M2 resources in the second resource group may be associated with another CRI, each of the N resource pairs including one resource included in the first resource group and one resource included in the second resource group may be associated with another CRI, and a mapping relationship between a total of (M1+M2+N) CRIs and CSI-RS resources may be defined / configured. When it is assumed that the CRI used for CSI calculation is one of N CRIs (i.e., when it is assumed that the CRI used for CSI calculation is one of the resource pairs), the signal transmitted through the antenna ports [3000, ..., 3000+P-1] of the CSI-RS resources included in the first (i.e., j=1) resource group among the CSI-RS resources indicated by the assumed CRI, the PDSCH signal transmitted through the PDSCH antenna ports [1000, ..., 1000+v-1] for the v1 layer, the signal transmitted through the antenna ports [3000, ..., 3000+P-1] of the CSI-RS resources included in the second (i.e., j=2) resource group among the CSI-RS resources indicated by the assumed CRI, and the PDSCH signal transmitted through the PDSCH antenna ports [1000+v1, ..., 1000+v1+v2-1] for the v2 layer may satisfy the following Equation 6. In this case, the total number of PDSCH layers is v=v1+v2, the number of CSI-RS ports for each CSI-RS resource may be different, and the ratio between the PDSCH EPRE corresponding to each PDSCH layer and the CSI-RS EPRE for each resource group may be assumed according to the value of (Pc, powerControlOffset) set for each CSI-RS resource. Here, W j (i) is a precoding matrix indicated by the j-th PMI (j∈{1,2}). Signals transmitted from antenna ports corresponding to different resource groups may be assumed to interfere with each other when calculating the CSI.

[0563] [Equation 6]

[0564]

[0565] Each CSI report has a priority value according to the following rules (lower values ​​have higher priority). When two different CSI reports conflict, the two different CSI reports can be combined into one CSI report, or one of the two different CSI reports can be selected. In these cases, the priority can be used to adjust the CSI content to fit the CSI payload or select one CSI report.

[0566] CSI reports can be reported with a priority value Pri iCSI (y,k,c,s)=2·N cells ·M s y+N cells ·M s k+M s c+s is associated.

[0567] Here, for non-periodic CSI reporting to be delivered on PUSCH, y can be 0, for semi-persistent CSI reporting to be delivered on PUSCH, y can be 1, for semi-persistent CSI reporting to be delivered on PUCCH, y can be 2, and for periodic CSI reporting to be delivered on PUCCH, y can be 3.

[0568] For a CSI report carrying L1-RSRP or L1-SINR, k may be 0; for a CSI report not carrying L1-RSRP or L1-SINR, k may be 1.

[0569] c can be the serving cell index, N cells And it can be the value of the higher-level parameter maxNrofServingCells.

[0570] s may be reportConfigID and may be a value according to the higher layer parameter maxNrofCSI-ReportConfigurations.

[0571] When the first CSI reported Pri iCSI The value of (y,k,c,s) is lower than the Pri reported in the second CSI iCSI When the value of (y, k, c, s) is less than 0.05, the first CSI report is considered to have a higher priority than the second CSI report.

[0572] Two CSI reports are considered to collide if their time occupancy overlaps in at least one OFDM symbol and the physical channels are transmitted in the same carrier. Consider the case where the terminal is configured to transmit two colliding CSI reports.

[0573] When the value of y differs between two CSI reports, the following rules apply, except when one of the values ​​of y is 2 and the other is 3 (the case of CSI reports sent on PUSCH is described in Section 5.2.3, and the case of CSI reports sent on PUCCH is described in Section 5.2.4).

[0574] ·Has a higher Pri iCSI The CSI report of the (y, k, c, s) value is not sent by the terminal.

[0575] Otherwise, the two CSI reports may be multiplexed or one of the CSI reports may be dropped based on the priority value as described in section 9.2.5.2 of [TS38.213].

[0576] If a semi-persistent CSI report to be carried on the PUSCH overlaps in time with a PUSCH data transmission in one or more symbols in the same carrier, and if the earliest symbol of these PUSCH channels is not earlier than N2+d after the last symbol of the DCI scheduling the PUSCH 2,1 Symbols start, where d 2,1 is associated with PUSCH carrying semi-persistent CSI reports and PUSCH with data transmission 2,1 If the maximum value of , the CSI report may not be sent by the terminal. Otherwise, if the timeline requirement is not met, this may be considered an error condition.

[0577] If the terminal is to transmit a first PUSCH including a semi-persistent CSI report and a second PUSCH including a UL-SCH, and the first PUSCH transmission will temporally overlap with the second PUSCH transmission, the terminal may transmit the second PUSCH instead of the first PUSCH. When at least one of the first PUSCH or the second PUSCH transmission responds to DCI format detection by the terminal, the terminal may expect the first PUSCH and the second PUSCH transmission to meet the above timing conditions for temporally overlapping PUSCH transmissions.

[0578] The terminal can report to the base station how many (N CPU ) CSI calculations. If the terminal needs to start calculations for N new CSI reports while L CSI processing units (CPUs) are already occupied (for CSI calculations), the terminal may not update the (NM) CSI reports with lower priorities according to the above priority sorting. Here, M can be the number of CSI reports that satisfy the relationship is the largest positive number greater than or equal to 0 and less than or equal to N, and It may refer to the number of CPUs used to calculate the nth CSI.

[0579] The number of CPUs required for each CSI report is as follows.

[0580] CSI report processing involves multiple CPUs occupied by multiple symbols, as follows:

[0581] For CSI reporting using CSI-ReportConfig with the higher layer parameter reportQuantity set to “none” and CSI-RS-ResourceSet configured with the higher layer parameter trs-Info, CPU =0

[0582] For CSI reporting using a CSI-ReportConfig with the higher layer parameter reportQuantity set to "cri-RSRP", "ssb-Index-RSRP", "cri-SINR", "ssb-Index-SINR", or "none" (and a CSI-RS-ResourceSet with the higher layer parameter trs-Info not configured), CPU =1

[0583] For CSI reporting using CSI-ReportConfig with the higher layer parameter reportQuantity set to "cri-RI-PMI-CQI", "cri-RI-i1", "cri-RI-i1-CQI", "cri-RI-CQI" or "cri-RI-LI-PMI-CQI",

[0584] If max{μPDCCH,μCSI-RS,μUL}≤3, and if CSI reporting is triggered aperiodically without sending PUSCH with transport blocks or HARQ-ACK or both when L=0 CPUs are occupied, where the CSI corresponds to a single CSI with wideband frequency granularity and to at most 4 CSI-RS ports in a single resource without CRI reporting, and where codebookType is set to "typeI-SinglePanel" or where reportQuantity is set to "cri-RI-CQI", O CPU =N CPU ,

[0585] [If CSI-ReportConfig is configured with the codebook type set to "typeI-SinglePanel", and the corresponding CSI-RS resource set for channel measurement is configured with two resource groups and N resource pairs, CPU =2N+M, where M is defined in Section 5.2.1.4.2]

[0586] Otherwise CPU =K s , where K s is the number of CSI-RS resources in the CSI-RS resource set used for channel measurement.

[0587] For CSI reporting using CSI-ReportConfig with higher layer parameter reportQuantity not set to "None", the CPU(s) are occupied for multiple OFDM symbols as follows:

[0588] Periodic or semi-persistent CSI reporting (excluding the initial semi-persistent CSI reporting on PUSCH following a PDCCH triggered report) occupies (one or more) CPUs starting from the first symbol of the earliest one of each CSI-RS / CSI-IM / SSB resource used for channel or interference measurement, with each latest CSI-RS / CSI-IM / SSB opportunity no later than the corresponding CSI reference resource, until the last symbol of the configured PUSCH / PUCCH carrying the report.

[0589] Aperiodic CSI reporting occupies (one or more) CPUs from the first symbol after the PDCCH that triggered the CSI report until the last symbol of the scheduled PUSCH carrying the report. When a PDCCH candidate is associated with a search space set configured with searchSpaceLinking, for the purpose of determining the CPU occupation duration, the PDCCH candidate that ends later in time of the two linked PDCCH candidates is used.

[0590] The initial semi-persistent CSI report on PUSCH after PDCCH triggering occupies (one or more) CPUs from the first symbol after the PDCCH until the last symbol of the scheduled PUSCH carrying the report. When a PDCCH candidate is associated with a search space set configured with searchSpaceLinking, for the purpose of determining the CPU occupation duration, the PDCCH candidate that ends later in time of the two linked PDCCH candidates is used.

[0591] For CSI reporting using CSI-ReportConfig with the higher layer parameter reportQuantity set to "none" and CSI-RS-ResourceSet with the higher layer parameter trs-Info not configured, the CPU(s) are occupied for multiple OFDM symbols as follows:

[0592] Semi-persistent CSI reporting (excluding the initial semi-persistent CSI reporting on the PUSCH following the PDCCH that triggered the report) occupies (one or more) CPUs from the first symbol of the earliest one of the periodic or semi-persistent CSI-RS / SSB resources for channel measurement for L1-RSRP calculation in each transmission opportunity until Z3′ symbols after the last symbol of the latest one of the CSI-RS / SSB resources for channel measurement for L1-RSRP calculation in each transmission opportunity.

[0593] Aperiodic CSI reporting occupies (one or more) CPUs from the first symbol after the PDCCH that triggered the CSI report until the last symbol between Z3 symbols after the first symbol after the PDCCH that triggered the CSI report and Z3′ symbols after the last symbol of the most recent of each CSI-RS / SSB resource for channel measurement used for L1-RSRP calculation.

[0594] Among them, (Z3, Z3′) is defined in Table 5.4-2.

[0595] In any time slot, the terminal is not expected to have more active CSI-RS ports or active CSI-RS resources in the active BWP than reported as a capability. The NZP CSI-RS resources are active for the duration defined as follows. For aperiodic CSI-RS, starting from the end of the PDCCH containing the request and ending at the end of the scheduled PUSCH containing the report associated with that aperiodic CSI-RS. When a PDCCH candidate is associated with a search space set configured with searchSpaceLinking, for the purpose of determining the NZP CSI-RS resource activity duration, the PDCCH candidate that ends later in time of the two linked PDCCH candidates is used. For semi-persistent CSI-RS, starting from the end of the application activation command and ending at the end of the application deactivation command. For periodic CSI-RS, starting when the periodic CSI-RS is configured by higher layer signaling and ending when the periodic CSI-RS configuration is released. If a CSI-RS resource is referenced N times by one or more CSI report configurations, the CSI-RS resource and the CSI-RS port within the CSI-RS resource are counted N times. For a CSI-RS resource set for channel measurement configured with two resource groups and N resource pairs, if a CSI-RS resource is referenced X times by one of the CSI-RS resources (where M is defined in Section 5.2.1.4.2) and / or one or two resource pairs, the CSI-RS resource and the CSI-RS port within the CSI-RS resource are counted X times.

[0596] As described above, the CSI reported in uplink time slot n can be derived by assuming (or considering) various factors including the following elements as specific values, and in the following description of the present disclosure, the elements assumed by the terminal when generating CSI are named CSI components. The following are examples of CSI components, and when applied in practice, the CSI components may not be limited thereto and may include more diverse elements provided by the present disclosure.

[0597] Frequency and time domain locations of CSI reference resources

[0598] The location of the valid downlink time slot

[0599] CMR / IMR transmission / measurement location (whether minimum delay requirements are met, etc.)

[0600] Priority between CSIs

[0601] The number of CPUs used for each CSI calculation, the maximum number of CPUs supported by the terminal, the number of currently occupied CPUs, whether CSI reporting is indicated / activated, and whether multi-TRP CSI is calculated

[0602] Downlink power control configuration value (e.g., powerControlOffset)

[0603] Discontinuous Reception (DRX) configuration, etc.

[0604] Radio resources in a mobile communication system can be utilized in various transmission modes to address different scenarios, including integrated access and backhaul (IAB) node operation, multiple transmit and receive point (multi-TRP) operation, and in-band or out-of-band full-duplex communication operation. On the other hand, in the above-mentioned mobile communication system, the transceiver (or base station or terminal) can operate with different time / frequency / space / power resources for the corresponding transmission mode, or operate according to instructions from the base station considering each transmission mode, aiming to improve the quality of wireless communication. This includes utilizing different numbers of antennas, antenna configurations, and transmission powers for each transmission mode. In 5G NR or 6G communications, there is an emerging need to dynamically change various transmission modes for the purpose of expanding wireless communication quality / capacity while ensuring robustness and resilience to various communication environments. In this case, the various transmission modes are likely to use different values ​​for the above-mentioned factors included in the CSI derivation for each mode. These different values ​​may cause inconsistencies between operations such as semi-static CSI measurement / reporting (e.g., periodic CSI-RS or periodic CSI reporting) and dynamic transmission mode changes or activations (e.g., dynamic operating mode indication / activation), and this inconsistency may result in degradation of CSI reporting performance.

[0605] The present disclosure provides a method for measuring and reporting channel state information to efficiently support dynamically changing transmission modes. According to one of the methods provided in this disclosure, a base station and a terminal can perform various operations, such as determining the validity of a CSI report, determining the priority of a CSI report, or determining the amount of (computational) resources of the terminal required for CSI reporting, thereby improving wireless communication quality.

[0606] The subject of the method provided in the present disclosure described below will be described as a base station or a terminal. However, this is only for ease of description, and when applied to super 5G or 6G mobile communication technology in the future, the subject is not limited to the base station or the terminal, and can be applied to wireless communication between devices in a similar manner. For example, the base station can be replaced by an IAB-DU (of an upper node), a repeater-DU or a repeater-remote unit (or RF unit, RU), and the terminal can be replaced by a user equipment (UE), a mobile equipment (ME), a mobile terminal (MT), an IAB-MT (of a lower node) or a repeater-MT, and these methods can be applied as extensions to similar methods.

[0607] For example, when the present disclosure is applied to an IAB network, the high-level configuration operation from the base station to the terminal through RRC or MAC CE signaling may refer to the high-level configuration operation from the IAB-DU (or IAB node) of the CU or upper node to the IAB-MT of the lower node (or neighbor IAB node) through F1AP signaling.

[0608] As another example, when the present disclosure is applied to an IAB network, the operation of the terminal reporting to the base station on the PUSCH or PUCCH may refer to the operation of the IAB-MT (or a lower node) (or the IAB-MT of an IAB node) reporting to the CU or the IAB-DU of the upper node (or the IAB-DU of a neighboring IAB node) on the PUSCH or PUCCH. Specific examples of various other possible operations are omitted to avoid obscuring the main points of the description.

[0609] First embodiment: Method for determining an operation mode for CSI reporting

[0610] The first exemplary embodiment will describe a method of determining an operation mode to be assumed when deriving / generating / calculating a CSI report for a specific resource period when a base station allocates one or more operation modes to a terminal within the specific resource period.

[0611] In the exemplary embodiments described below, the base station may be replaced by a CU or an upper node, and the terminal may be replaced by an IAB-MT of a lower node or an IAB node. In addition, a specific resource period may include one or a combination of time resources, frequency resources, space resources, and code resources. For example, a specific combination such as a time-frequency resource period may be possible. In addition, the allocation of (one or more) operating modes may be understood as the configuration of (one or more) operating modes, the activation of (one or more) operating modes, the indication of (one or more) operating modes, and the like. For example, the configuration of (one or more) operating modes may be performed by RRC signaling. As another example, the activation of (one or more) operating modes may be performed by MAC CE signaling. As another example, the indication of (one or more) operating modes may be performed by DCI and / or MAC CE. In addition, the method for determining the operating mode may be performed by a combination of RRC, MAC CE, and DCI.

[0612] Figure 20 is a conceptual diagram for describing a method by which a base station allocates one or more operation modes to a terminal within a resource period.

[0613] Reference Figure 20 , the base station may allocate specific resources to operation mode A (2000). In other words, the base station may allocate specific time / frequency / space / code resources 2000 to operation mode A. Operation mode A may be a basic mode and may be agreed to have the highest priority. Since operation mode A is a basic mode, it can be applied regardless of any of configuration / activation / indication. In addition, since operation mode A is a basic mode, it may be a default mode and may fall back from another operation mode. In addition, the resources allocated to operation mode A may be at least one of time / frequency / space / code resources or a combination of two or more.

[0614] like Figure 20 As shown, operation mode B may be a mode that uses some resources of operation mode A, and operation mode C may also be a mode that uses some resources of operation mode A. Some resources of operation mode B and some resources of operation mode C may have overlapping resources, as shown by reference numeral 2015. The remaining resources of operation mode B and the remaining resources of operation mode C (excluding the overlapping resources shown by reference numeral 2015) are illustrated as being disjoint.

[0615] The base station may assign operating mode B as an additional operating mode in addition to operating mode A, depending on the capabilities of the base station. Furthermore, the base station may assign operating mode C as an additional operating mode in addition to operating mode A, depending on the capabilities of the base station. For example, the base station may assign only operating mode A, or may assign operating mode A and additionally assign operating mode B. As another example, the base station may assign operating mode A and additionally assign operating mode C. As another example, the base station may assign operating mode A, may additionally assign operating mode B, and may also assign operating mode C. In addition to operating mode A, which is the basic mode, operating mode B and operating mode C may be assigned simultaneously or sequentially.

[0616] As described above, when two or three operating modes are allocated, there may be overlapping resources available in the two or three operating modes.

[0617] For example, when operating mode A and operating mode B are assigned, overlapping resources may be resources 2005 for operating mode B. As another example, when operating mode A and operating mode C are assigned, overlapping resources may be resources 2010 for operating mode C. As another example, when operating mode A, operating mode B, and operating mode C are all assigned, overlapping resources 2015 may exist in all three operating modes.

[0618] The operating mode applied to a specific resource may be dynamically changed through MAC CE and / or DCI.The operating modes described in this disclosure may exist in various forms.

[0619] For example, the type of operating mode can be classified based on the applied IAB DU / MT multiplexing mode. Here, the multiplexing mode may include at least one of TDM / FDM / SDM. As another example, the type of operating mode can be classified based on the IAB FDM resource configuration (whether the frequency domain HSNA configuration is applied). As another example, the type of operating mode can be classified based on the frequency or time resource configuration used for enhanced duplexing. Here, the frequency or time resource configuration can be expressed as XDD, and XDD can include FDD, TDD, sub-band full duplex (SFBD), and full duplex (FD). Here, FD can include intra-band full duplex.

[0620] As another example, the type of operating mode can be classified based on whether a downlink (DL) transmit power adjustment configuration is applied. As another example, the type of operating mode can be classified based on whether a restricted / desired DU / MT beam configuration is applied. As another example, the type of operating mode can be classified based on whether a UL PSD range configuration is applied. As another example, the type of operating mode can be classified based on whether a case #1 / #6 / #7 timing configuration is applied. As another example, the type of operating mode can be classified based on whether the type of operating mode is included in a time slot list indicated by one of the IAB MAC CEs.

[0621] In the above, various types of operation modes are described, and only independent operation modes are described, but a combination of two or more operation modes is possible.

[0622] In addition, the type of the above-mentioned operation mode and the resources corresponding to the operation mode may be provided to the terminal through higher layer signaling.

[0623] Figure 21 is a conceptual diagram for describing a method in which a base station allocates resources to a terminal according to an operation mode by using time-frequency resources.

[0624] Reference Figure 21 , the horizontal axis represents time, and the vertical axis represents frequency. Figure 21 The time slots and symbols are shown together in FIG, but for ease of description, only the time slots will be used for description. However, the time slots can be understood by replacing the time slots with multiple symbols. Figure 21 On the time axis, a first time zone in which only DL time slots are transmitted may be arranged, a second time zone in which only UL time slots are transmitted may be arranged, and then a third time zone in which mixed downlink and uplink time slots are transmitted may be arranged. In the third time zone, the mixed downlink and uplink time slots may be divided into downlink time slots and uplink time slots by frequency. Figure 21 In the following description, for the convenience of description, the repeated time zones are sequentially referred to as the fourth time zone, the fifth time zone, and the sixth time zone starting after the third time zone.

[0625] The base station may configure a specific time period to operate in TDD mode 2100. In this case, it may be assumed that TDD mode is previously Figure 20 The operation mode A described in . The TDD mode 2100 as the operation mode A may be allocated resources of the first time zone, the second time zone, the fourth time zone, and the fifth time zone.

[0626] The third time zone and the sixth time zone may operate in enhanced duplex mode 2110. In the following description, enhanced duplex mode will be referred to as operation mode B. Enhanced duplex mode 2110 may include various cases such as a flexible duplex mode including XDD (FDD, TDD, and sub-band full duplex) and FD mode.

[0627] Since the base station uses enhanced duplex mode 2110, a specific frequency resource (group) within the same time period (e.g., the third time zone or the sixth time zone) may be allowed to be used for a specific terminal (group) as (one or more) downlink time slots or (one or more) symbols, and other frequency resources (groups) within the same time period may be allocated to another terminal (group) as (one or more) uplink time slots or (one or more) symbols. As a specific example, the base station may allocate downlink time slots or symbols to terminal group A in the third time zone, and may allocate downlink time slots or symbols to terminal group B in the third time zone. Terminal group A may include at least one terminal, and terminal group B may include at least one terminal not included in terminal group A.

[0628] As described above, in order to allocate separate resources corresponding to the operating mode to different terminals in the same resource region, the base station may semi-statically allocate resources to each terminal or terminal group based on higher-layer signaling (e.g., F1AP, RRC, or MAC CE, etc.). As another example, the base station may dynamically allocate resources to each terminal or terminal group based on layer 2 (L2) signaling (e.g., MAC CE) or layer 1 (L1) signaling (e.g., DCI).

[0629] In this case, the corresponding operating mode may be associated with a set of different CSI components (i.e., elements that the terminal needs to assume when generating CSI). In this case, the base station may need to receive separate CSI reports for resource period 2100 and resource period 2110 to improve wireless transmission efficiency.

[0630] For example, the resource allocation characteristics for CSI measurement and reporting for periodic CSI reporting based on periodic CMR / IMR measurements may not match the resource allocation characteristics of the operating mode (e.g., dynamic transmission mode resource allocation). As another example, there may be a mismatch between the resource allocation / change time for CSI measurement and reporting (e.g., time slot n for CSI measurement / reporting configuration) and the resource allocation / change time for the operating mode (e.g., time slot n+N for allocation of operating mode resources). In this case, the terminal or base station may need to determine which CSI component (set) the CSI report is associated with.

[0631] In addition, the type(s) of the above-mentioned operation mode(s) and resources corresponding to the operation mode(s) may be provided to the terminal through higher layer signaling.

[0632] Figure 22 is a conceptual diagram for describing a method in which a base station allocates resources to a terminal according to an operation mode by using frequency-time slots (or symbols).

[0633] Reference Figure 22 , the horizontal axis represents time based on DL slots or symbols, and the vertical axis represents frequency. Figure 22 In the description of , time slots will be used for ease of description. Figure 22 As shown, a time slot can be understood by replacing the time slot with a number of symbols.

[0634] exist Figure 22 On the slot-based time axis in the , a first slot region for IAB-DU operation, a second slot region for IAB-MT operation, and a third slot region for mixed IAB-DU and IAB-MT operation can be arranged. In the third slot region, resources can be allocated to IAB-DU and IAB-MT operations separately by frequency. Figure 22 The first to third time slot areas are repeated twice. In the following description, for convenience of description, the repeated time slot areas will be sequentially referred to as the fourth time slot area, the fifth time slot area, and the sixth time slot area starting after the third time slot area.

[0635] The base station can perform IAB-DU operation and IAB-MT operation in TDM mode. For example, in the first time slot area, the second time slot area, the fourth time slot area, and the fifth time slot area, IAB-DU operation and IAB-MT operation can be performed in TDD mode. Therefore, the first time slot area, the second time slot area, the fourth time slot area, and the fifth time slot area can become time-frequency resources 2200 for TDM operation. Figure 22 In the example, TDM operation is assumed to be operation mode A. Operation mode A can be configured through time domain HSNA configuration.

[0636] On the other hand, the base station may configure the third and sixth time slot areas to operate in non-TDM mode. For example, in the third time slot area, IAB-DU operation and IAB-MT operation may be FDM. Additionally, in the sixth time slot area, IAB-DU operation and IAB-MT operation may be spatial division multiplexing (SDM). As described above, it is assumed that the operation mode of the third and sixth time slot areas is operation mode B. Operation mode B may be configured through frequency domain HSNA configuration. The resources used for operation mode B may be time-frequency resources 2210 for FDM / SDM operation.

[0637] Based on the above description, time-frequency resources for IAB-DU operation can be allocated in the first and fourth slot regions where TDM operation is performed, and time-frequency resources 2200 for IAB-MT operation can be allocated in the second and sixth slot regions. In addition, time-frequency resources 2210 corresponding to FDM or SDM can be allocated for IAB-DU operation and IAB-MT operation in the third and sixth slot regions.

[0638] In addition, the operation mode can be divided into detailed operation modes according to other related functions. These will be described as follows.

[0639] 1) Resource A allocated to the TDM mode may be classified as operation mode A-1 associated with Pc set by a higher layer. Here, it may mean that the PDSCH EPRE in resource A is derived by the above-mentioned powerControlOffset.

[0640] 2) Resource B allocated to the FDM mode may be classified as operation mode B-1 associated with the provided or desired downlink transmit power adjustment MAC CE B. Here, in addition to the CSI-RS / PDSCH power ratio through the above-mentioned powerControlOffset, the PDSCH EPRE in resource B may be derived by additionally considering the value indicated by MAC CE B.

[0641] 3) Resource C allocated to the FDM mode may be classified as operation mode B-2 associated with the provided or desired downlink transmit power adjustment MAC CE C. Here, in addition to the CSI-RS / PDSCH power ratio through the above-mentioned powerControlOffset, the PDSCH EPRE in resource C may also be derived by additionally considering the value indicated by MAC CE C.

[0642] If resource B allocated to the FDM mode is a resource related to IAB-DU operation, resource C allocated to the FDM mode may be a resource related to IAB-MT operation. Conversely, if resource B allocated to the FDM mode is a resource related to IAB-MT operation, resource C allocated to the FDM mode may be a resource related to IAB-DU operation.

[0643] Resources for the above-described operating modes may be semi-statically allocated based on higher-layer signaling (e.g., F1AP, RRC, or MAC CE, etc.). As another example, resources for the above-described operating modes may be dynamically allocated based on layer 2 (L2) signaling (e.g., MAC CE) or layer 1 (L1) signaling (e.g., DCI).

[0644] In this case, each operating mode may be associated with a set of different CSI components (elements that the terminal needs to assume when generating CSI). In this case, the base station may need to receive separate CSI reports for each resource period 2200 and 2210 to improve wireless transmission efficiency.

[0645] When the resource allocation characteristics of CSI measurement and reporting do not match the resource allocation characteristics of the operating mode, or when the resource allocation / change time of CSI measurement and reporting does not match the resource allocation / change time of the operating mode, the terminal (or base station) may need to determine which CSI component (set) the CSI report is associated with. For example, the resource allocation characteristics of CSI measurement and reporting may be periodic CSI reporting based on periodic CMR / IMR measurement, and the resource allocation characteristics of the operating mode may be dynamic operating mode resource allocation.

[0646] In addition, as an example of a case where the resource allocation / change time of CSI measurement and reporting does not match the resource allocation / change time of the operating mode, the CSI measurement / reporting can be configured in time slot n, and the resource allocation / change of the operating mode can be configured (e.g., the operating mode resources are allocated) in time slot n+N.

[0647] As another example, as mentioned above with reference to Figure 20 In the example described, two or more different operating modes may be simultaneously assigned to a specific resource (e.g., 2015). This specifically means that a specific time slot list and RB set (or RB set group) is configured as time-domain soft resources in 3GPP Rel-16 and / or frequency-domain soft resources in 3GPP Rel-17. The operating mode of the corresponding time-frequency resource can be dynamically changed via DCI format 2_5. Even in this case, the terminal (or base station) may need to determine which CSI component (set) the CSI report is associated with.

[0648] The above-mentioned (one or more) operating modes may be combined with other (one or more) operating modes. Figures 20 to 22 Some of the operation modes described in can be combined to configure a new operation mode.

[0649] For example, in Figure 20 , operation mode A may be defined as a TDM operation mode of IAB-DU / IAB-MT based on time domain HSNA configuration, and operation mode B may be defined as a combination of an FDM (or SDM) operation mode of IAB-DU / IAB-MT based on frequency domain HSNA configuration and a downlink transmit power adjustment operation mode based on the provided downlink Tx power adjustment (DL Tx Power Adjustment) MAC CE. Figure 21 and Figure 22 The example of can be similarly extended.

[0650] Figure 23 is a conceptual diagram for describing CSI reporting for corresponding operation modes according to an exemplary embodiment of the present disclosure.

[0651] Reference Figure 23 , the horizontal axis represents time, and the vertical axis represents frequency. Figure 23 It shows the case where different operation modes are configured in time sequence.

[0652] Reference in chronological order Figure 23 , showing a first time zone in which operation mode A 2300 is activated, a second time zone in which operation mode B 2310 is activated, a third time zone in which operation mode A 2320 is activated again, and a fourth time zone in which operation mode C 2330 is activated.

[0653] In order to change Figure 23 In the example of the operation mode shown in FIG, the base station may configure / activate / indicate one or more operation modes 2300, 2310, 2320, and 2330 to the terminal. In this case, the resources for configuring (or activating or indicating) the corresponding operation modes 2300, 2310, 2320, and 2330 may be the same or different resources. For example, in Figure 23 As can be seen in , time resources are different. In addition, Figure 23 It can be seen that the frequency resources are the same.

[0654] Description assigned to Figure 23 In the corresponding operation mode of the resource, during the time configured for operation mode A 2300, CMR and / or IMR 2306 are sent, CSI reference resources 2304 may be allocated, and resources for CSI reporting 2302 may be allocated. In addition, Figure 23 A form in which CMRs and / or IMRs 2316 are additionally transmitted during the time configured for operating mode A 2300 is shown.

[0655] This example shows that CSI reference resources 2314 are allocated for a time configured for operation mode B 2310, followed by CSI reporting resources 2312. Thereafter, CMRs and / or IMRs may be sent without reference numbers, and CSI reference resources and CSI reporting resources may be allocated without reference numbers.

[0656] During a second time period configured for operation mode A 2320 , a CMR and / or IMR without a reference number may be transmitted first, then CSI reference resources and CSI reporting resources may be allocated, and the CMR and / or IMR 2336 may be transmitted.

[0657] Finally, CSI reference resources 2334 and CSI reporting resources 2332 may be allocated during the time configured for operation mode C 2330, then CMRs and / or IMRs without reference numbers may be allocated, and CSI reference resources and CSI reporting resources may be allocated.

[0658] As described above, the transmission / monitoring / measurement locations of the channel estimation resources (e.g., CMRs and / IMRs 2306, 2316, and 2336) for specific CSI reports 2302, 2312, and 2332 and the locations of the CSI reference resources 2304, 2314, and 2334 for the corresponding CSI reports may occupy different resources allocated to different operating modes. In other words, the operating mode associated with the channel estimation resources and the operating mode associated with the CSI reference resources may not match.

[0659] Describing this in more detail, when operating mode A 2300 associated with CMR and / or IMR 2306 and operating mode A 2300 associated with CSI reference resource 2304 match, CSI reporting resource 2302 based on resources 2306 and 2304 has no ambiguity regarding CSI components according to operating mode A 2300 .

[0660] On the other hand, when operating mode A 2300 and operating mode A 2320 associated with CMR and / or IMR 2316 and CMR and / or IMR 2336, respectively, and operating mode B 2310 and operating mode C 2330 associated with CSI reference resources 2314 and 2334 do not match, it may be ambiguous whether the CSI reporting resources 2312 and 2332 based on resources 2316, 2336, 2314 and 2334 are derived from which operating mode's CSI component among the first operating mode A 2300, the second operating mode A 2320, the operating mode B 2310 and the operating mode 2330.

[0661] This ambiguity can be problematic, particularly when the terminal monitors or receives activation / indication signaling for an operating mode change (e.g., operating mode A to operating mode B and / or operating mode A to operating mode C) after beginning to occupy one or more CPUs for CSI calculations based on the results of monitoring channel estimation resources 2316 and 2336.

[0662] To address the above issues, the base station and the terminal may, based on at least one of the following methods, eliminate the ambiguity of the CSI component assumptions by determining the operating mode assumed for CSI derivation, limiting the target frequency band used for CSI derivation (the frequency band of the CSI reference resource), or limiting the channel estimation resources referenced for CSI derivation (the time period or frequency band of the CMR and / or IMR).

[0663] An example of a specific method for this is as follows: The terminal described below may be understood as one of a UE, an IAB-MT, or a Relay-MT.

[0664] Method #1: The terminal may generate CSI by considering the operation mode of the CSI reference resource applied to a specific CSI report. The operation mode applied to the CSI reference resource may be defined as one of the following cases.

[0665] 1) Operation mode configured by higher-layer signaling (SIB, RRC, or F1AP) in the same (overlapping) slot (or symbol) as the CSI reference resource.

[0666] 2) An operating mode activated or indicated by higher-layer signaling (MAC CE) in the same (or overlapping) time slot (or symbol) as the CSI reference resource.

[0667] 3) When higher-layer signaling (MAC CE) is received at a specific time (e.g., a minimum delay time Z', such as a predetermined number of time slots or symbols, or a separately configured or indicated number of time slots or symbols) before the same time slot (or symbol) as the CSI reference resource, an operating mode activated or indicated by higher-layer signaling (MAC CE) in the same (overlapping) time slot (or symbol) as the CSI reference resource.

[0668] 4) Operation mode indicated by L1 signaling (DCI) in the same (overlapping) time slot (or symbol) as the CSI reference resource.

[0669] 5) When L1 signaling (DCI) is received at a specific time (e.g., a minimum delay time Z', such as a predetermined number of time slots or symbols, or a separately configured or indicated number of time slots or symbols) before the same time slot (or symbol) as the CSI reference resource, the operation mode indicated by L1 signaling (DCI) in the same (overlapping) time slot (or symbol) as the CSI reference resource.

[0670] In the above cases 3) and 4), if one of the conditions is not met, it can be agreed that a default operating mode is assumed in the CSI reference resource. An example of a case where one of the conditions in cases 3) and 4) is not met may be a case where signaling activating or indicating a specific operating mode is not received at a specific time before the time slot (or symbol) of the CSI reference resource time slot.

[0671] The default operating mode can be one of the following modes.

[0672] a. Operation mode used when receiving cell-specific or group-specific downlink signals (such as MIB (PBCH), SIB, CSI-RS or CORESET 0, etc.).

[0673] b. Operation mode used when transmitting cell-specific or group-specific uplink signals (eg, PRACH, SRS, etc.).

[0674] c. Operation mode configured through separate high-level parameters.

[0675] d. The assumed operating mode in CSI reporting defined in 3GPP Rel-15.

[0676] Method #2: The base station may individually configure or instruct the terminal to consider (one or more) operating modes when deriving (calculating) CSI for a specific CSI report. When a CSI report is associated with multiple operating modes, the terminal may derive CSI by considering the operating mode with the highest priority. For specific examples of priority determination, reference may be made to other exemplary embodiments of the present disclosure. When deriving CSI for a CSI report not associated with an individual configuration or instruction, the terminal may be required to assume a default operating mode. Since the default operating mode is the same as the mode described in Method #1, its redundant description is omitted.

[0677] Method #3: The base station may configure or instruct the terminal to perform CSI reporting that includes multiple CSI values ​​considering multiple operating modes. For example, when N operating modes are configured or indicated to be considered for a specific CSI report, the terminal may report CSI consisting of N pairs of CSI values ​​(CRI, RI, PMI, CQI, RSRP, etc.). In this case, the N CSI pairs for the N operating modes can be understood as the serving cell including the CSI being extended to N virtual serving cells. The stacking order of the N CSI pairs for the N operating modes may be determined by the priority of the N operating modes or the order in which the N operating modes are configured / indicated.

[0678] Here, the stacking order can be a criterion for when some CSI needs to be dropped because there is not enough PUCCH or PUSCH payload for CSI reporting. As another example, when two different operating modes are configured or indicated for a particular CSI report, the terminal can use (subband) differential CQI to report the difference between the CQI of the first operating mode and the second operating mode. The first operating mode may not be separately configured or indicated, but may be implicitly determined based on one of the examples of the default operating mode in method #1.

[0679] • Method #4: When the CMR and / or IMR associated with the CSI report uses different time resources (different symbols, different time slots, or different symbols / time slots separated by N or more intervals, etc.) associated with different operating modes, the terminal may omit or ignore the CSI report.

[0680] As another example, when the CMR, IMR and / or CSI reference resources associated with the CSI report use different time resources associated with different operating modes (different symbols, different time slots, or different symbols / time slots separated by N or more intervals, etc.), the terminal may omit or ignore the CSI report.

[0681] Thus, the terminal can omit CSI reporting having ambiguity related to the operation mode, and reduce the burden on the terminal and the uplink load for CSI reporting.

[0682] Method #5: When the CMR and / or IMR associated with the CSI report uses different frequency resources associated with different operating modes (different RBs, different RB sets / RB set groups, or different RBs / RB sets / RB set groups separated by N or more intervals, etc.), the terminal may omit or ignore the CSI report.

[0683] As another example, when the CMR, IMR and / or CSI reference resources associated with the CSI report use different frequency resources associated with different operating modes (different RBs, different RB sets / RB set groups, or different RBs / RB sets / RB set groups separated by N or more intervals, etc.), the terminal may omit or ignore the CSI report.

[0684] Thus, the terminal can omit CSI reporting having ambiguity related to the operation mode, and reduce the burden on the terminal and the uplink load for CSI reporting.

[0685] Method #6: When the CMR and / or IMR associated with the CSI report use different time resources associated with different operating modes, the terminal may omit or ignore the CSI report. Here, the case where the CMR and IMR associated with the CSI report use different time resources associated with different operating modes may be one of the following cases.

[0686] a. They are included in different IAB (or repeater) time resource configurations.

[0687] b. CMRs are configured in time slots included in the time slot list indicated by the provided DL TX power adjustment MAC CE, and IMRs are configured in time slots not included in the time slot list.

[0688] c. CMR is configured in a timeslot not included in the timeslot list indicated by the provided DL TX power adjustment MAC CE, and IMR is configured in a timeslot included in the timeslot list.

[0689] As another example, when the CMR, IMR, and / or CSI reference resources associated with the CSI report use different time resources associated with different operating modes, the terminal may omit or ignore the CSI report. Here, the case where the CMR, IMR, and CSI reference resources associated with the CSI report use different time resources associated with different operating modes may be one of the following cases.

[0690] a. They are included in different IAB (or repeater) time resource configurations.

[0691] b. CMR and / or IMR are configured in time slots included in the time slot list indicated by the provided DL TX power adjustment MAC CE, and CSI reference resources are configured in time slots not included in the time slot list.

[0692] c. CMR and / or IMR are configured in time slots not included in the time slot list indicated by the provided DL TX power adjustment MAC CE, and CSI reference resources are configured in time slots included in the time slot list.

[0693] Thus, the terminal can omit CSI reporting having ambiguity related to the operation mode, and reduce the burden on the terminal and the uplink load for CSI reporting.

[0694] Method #7: When the CMR and / or IMR associated with the CSI report use different frequency resources associated with different operating modes, the terminal may omit or ignore the CSI report. Here, the case where the CMR and IMR associated with the CSI report use different frequency resources associated with different operating modes can be one of the following cases.

[0695] a. They are included in different IAB (or repeater) frequency resource configurations.

[0696] b. CMRs are configured within an RB set / RB set group included in the frequency domain H / S / NA configuration, and IMRs are configured within (one or more) RBs not included in the RB set / RB set group.

[0697] c. CMRs are configured in an RB set / RB set group not included in the frequency domain H / S / NA configuration, and IMRs are configured in RBs included in the RB set / RB set group.

[0698] Method #8: When the CMR and / or IMR associated with a CSI report uses different time / frequency resources associated with different operating modes, the terminal may perform CSI derivation (calculation) based on the operating mode of the CMR (e.g., whether DL TX power adjustment is applied). That is, the operating mode of the IMR may be overridden by the operating mode of the CMR. Similarly, when the CMR and / or IMR associated with a CSI report uses different time / frequency resources associated with different operating modes, the terminal may perform CSI derivation (calculation) based on the operating mode of the IMR (e.g., whether DL TX power adjustment is applied). That is, the operating mode of the CMR may be overridden by the operating mode of the IMR. Similarly, when the CMR, IMR, and CSI reference resources associated with a CSI report use different time / frequency resources associated with different operating modes, the terminal may perform CSI derivation (calculation) based on the operating mode (e.g., whether DL TX power adjustment is applied) of the resource with the highest priority (e.g., the CSI reference resource). That is, the operating mode of the CMR / IMR may be overridden by the operating mode of the CSI reference resource. Thus, the terminal can omit CSI reporting having ambiguity related to the operation mode, and reduce the burden on the terminal and the uplink load for CSI reporting.

[0699] Method #9: If an operating mode associated with a CSI report exists, the terminal may consider only the frequency resources allocated to (or associated with) the operating mode when deriving (calculating) the wideband CQI. In other words, when calculating the CQI, the terminal may consider only the frequency resources associated with the operating mode to determine the TBS. This allows the terminal to omit CSI reports with ambiguity related to the operating mode, reducing the burden on the terminal and the uplink load for CSI reporting.

[0700] When multiple frequency resource configurations exist simultaneously for a certain operating mode, it may be agreed that CSI is derived (calculated) for the frequency resource with the narrowest frequency band (i.e., the frequency resource with the smallest TBS). The opposite situation is also possible. For example, when multiple frequency resource configurations exist simultaneously for a certain operating mode, it may be agreed that CSI is derived (calculated) for the frequency resource with the widest frequency band (i.e., the frequency resource with the largest TBS). An example of the situation where multiple frequency resource configurations exist simultaneously for a certain operating mode may be the situation where multiple RB sets or RB set groups exist for FDM H / S resource configurations for eIAB.

[0701] Similarly, when multiple frequency resource configurations exist simultaneously for a certain operating mode (for example, when multiple RB sets or RB set groups exist for FDM H / S resource configurations for eIAB), the base station can configure the terminal through separate signaling based on which frequency resource configuration the terminal will derive (calculate) CSI.

[0702] Method #10: When multiple operating modes exist simultaneously (according to configuration or instruction), it may be agreed or configured / instructed that the terminal report CSI with the lowest MCS (or modulation scheme, coding rate, efficiency, etc.) among multiple CSIs derived for the multiple operating modes. As another example, it may be agreed or configured / instructed that the terminal report CSI with the highest MCS (or modulation scheme, coding rate, efficiency, etc.) among multiple CSIs derived for the multiple operating modes.

[0703] In an exemplary embodiment, the CSI may include an indicator for the operating mode assumed when deriving the CSI. This allows the terminal to resolve ambiguities in deriving (calculating) the CSI and improve the accuracy of the CSI report.

[0704] Method #11: When an operating mode associated with CSI reporting exists, the terminal can be stipulated, configured, or instructed to exclude CMRs and / or IMRs not transmitted in the time / frequency resources associated with the operating mode when calculating CSI. This allows the terminal to resolve ambiguities in deriving (calculating) CSI and improve the accuracy of CSI reporting.

[0705] The terminal may be agreed or configured / instructed to apply one of methods #1 to #11 equally to the CSI-RS group for multiple TRPs. For example, when different methods are configured / instructed, they may be unified according to a specific standard, or they may be guaranteed to be configured / instructed as the same method.

[0706] Similarly, the terminal may be stipulated or configured / instructed to apply different methods to different CSI-RS groups.

[0707] The above methods #1 to #11 may be limited to being applied only when the IMR is configured as NZP CSI-RS. This may be because in the case of CSI-IM-based IMR, the operating mode applied to the interference signal is implicitly reflected based on the ZP CSI-RS configuration.

[0708] In the above-mentioned methods #1 to #11, a frequency resource (or time resource) region assumed when generating CSI for a CSI report associated with an operation mode may mean one of those described below.

[0709] Resources configured for the DU / RU (e.g., IAB-DU) of a node (e.g., IAB node) including a CSI-generating entity (e.g., IAB-MT) for the operating mode. For example, the configured resources may be FDM HSNA resources allocated by the frequency domain IAB-DU-Resource-Configuration-H / S / NA-Config of 3GPP Rel-17 or FDM soft resources indicated as "available" or "unavailable" by DCI format 2_5.

[0710] The resources (e.g., MT-CC) allocated to the entity generating CSI (e.g., IAB-MT) are excluded from any resources that overlap with the resources allocated to the DU / RU (e.g., IAB-DU) of the node including the entity generating CSI (e.g., IAB-MT). For example, the allocated resources may be FDM HSNA resources allocated by the frequency domain IAB-DU-Resource-Configuration-H / S / NA-Config of 3GPP Rel-17 or FDM soft resources indicated as "available" or "unavailable" by DCI format 2_5.

[0711] Among the resources allocated to the subject generating CSI (eg, MT-CC), resources available to the subject generating CSI (eg, IAB-MT) in a downlink reception operation (or uplink transmission operation) for the operation mode.

[0712] Resources configured for the DU / RU (e.g., parent node of the IAB-DU) of the parent / superior node (e.g., IAB parent node, donor node, CU) of the node that generates the CSI for the operating mode. For example, the configured resources may be FDM HSNA resources allocated by the frequency domain IAB-DU-Resource-Configuration-H / S / NA-Config of 3GPP Rel-17 or FDM soft resources indicated as "available" or "unavailable" by DCI format 2-5.

[0713] ·A region allocated by a separate and independent configuration, indication or report. For example, it can be a frequency (time) resource region configured or indicated by a base station, an upper node or a neighboring node, or a frequency (time) resource region explicitly or implicitly reported to the base station, the upper node or the neighboring node by the terminal through signaling such as DCI, MAC CE, RRC and / or F1AP. The implicit case may be a case where a frequency (time) resource region used / referenced by a CSI report associated with an operating mode is reported. The implicit case may be a case where the IAB-MT reports an operating mode (for example, one of the TDM (fallback) mode or the FDM mode) of a specific frequency (time) resource through a MAC CE, and the specific frequency (time) resource is designated as an IAB-MT frequency (time) resource available in the corresponding operating mode.

[0714] When generating CSI for a CSI report associated with a specific operating mode, the terminal may determine the TB size based on the frequency resource (or time resource) region according to one of the cases defined above. For example, this may mean that CSI (CRI, RI, LI, PMI, CQI, etc.) representing the frequency (or time) resource region according to one of the cases defined above (rather than the entire frequency band represented by the CSI report, where PDSCH transmission may be performed within a CC or BWP) needs to be generated when generating wideband CSI.

[0715] As another example, when generating subband CSI for a CSI report associated with a specific operating mode, the terminal may generate or report CSI (e.g., CRI, RI, LI, PMI, CQI, etc.) for a frequency (or time) resource region according to one of the cases defined above, and may not report (or omit) CSI for other frequency (or time) resource regions, or may report garbage values ​​therefor.

[0716] For example, modifications such as shown in Table 51 below may be considered.

[0717] [Table 51]

[0718]

[0719] Based on the above, the specifications can be improved as highlighted in bold in Table 52 below.

[0720] [Table 52]

[0721]

[0722]

[0723] In the above method, high-level (F1AP / RRC / MAC CE) configuration or (DCI) indication of (one or more) (candidate) values ​​of the interval N (symbol / time slot / RB / RB set / RB set group, etc.) between time / frequency resources may be similarly considered not only for the downlink direction (e.g., parent node->child node), but also for the uplink direction (e.g., child node->parent node) or horizontal direction (e.g., neighbor node->neighbor node).

[0724] The terminal may perform a UE (IAB-MT or Relay-MT) capability report indicating one of the above-mentioned methods #1 to #11 and including information about (one or more) (candidate) values ​​of the time / frequency resource interval N (symbol / time slot / RB / RB set / RB set group, etc.).

[0725] Figure 24 is a sequence diagram illustrating CSI resource configuration and reporting configuration, CSI request, operation mode configuration / activation / indication, and CSI reporting according to an exemplary embodiment of the present disclosure.

[0726] Reference Figure 24 In step 2420, the base station 2400 may perform CSI report configuration and resource configuration for the operation mode set A consisting of one or more operation modes to the terminal 2410, and request a CSI report based on this.

[0727] In addition, in step 2430 , the base station 2400 may allocate specific resources to an operation mode set B consisting of one or more operation modes, and notify (configure / activate / indicate) the same to the terminal 2410 .

[0728] In step 2440 , the terminal 2410 may derive (calculate) only the CSI corresponding to the operation mode belonging to the intersection of the operation mode set A and the operation mode set B for a certain CSI reference resource, and report it to the base station 2440 .

[0729] Thus, the terminal 2410 can reduce the CSI derivation (calculation) burden, and the base station 2400 or the network can minimize uplink resource occupancy for CSI reporting.

[0730] Figure 25 1 is a flowchart of CSI resource configuration and report configuration, operation mode configuration / activation / indication, and CSI reporting depending on whether specific conditions are met according to an exemplary embodiment of the present disclosure.

[0731] Reference Figure 25 In step 2500, the terminal may receive CSI report configuration and resource configuration including CMR and / or IMR configuration information from the base station, and may additionally receive activation or indication information for CSI.

[0732] In step 2505, the terminal may receive configuration, activation, and indication information of one or more operation modes for specific resources from the base station.

[0733] In step 2510, the terminal may perform corresponding CSI reporting only if the operating mode configuration, activation and indication signaling timings, and CMR and / or IMR timings all meet the conditions of methods #1 to #11 above. On the other hand, if the operating mode configuration, activation and indication signaling timings, and CMR and / or IMR timings do not meet the conditions of methods #1 to #11 above, the terminal may omit the corresponding CSI reporting.

[0734] As a result, the terminal can reduce the CSI derivation (calculation) burden, and the base station or network can minimize uplink resource occupancy for CSI reporting.

[0735] Second embodiment: CPU occupancy calculation method considering operation mode

[0736] A second exemplary embodiment of the present disclosure will describe a CPU occupancy management / calculation method in consideration of various operation modes.

[0737] When the CSI report configuration CSI-ReportConfig is associated with M (M>1) operation modes (e.g., IAB-DU / -MT simultaneous operation mode or multiplexing mode), and the terminal includes / performs CSI reporting of N (N>1) operation modes among the M operation modes, it can be agreed that the corresponding CSI report occupies O CPU =N CPUs.

[0738] When the CSI report configuration CSI-ReportConfig is associated with M (M>1) operation modes (e.g., IAB-DU / -MT simultaneous operation mode, multiplexing mode, or duplex mode) or specific frequency / time resources, and the terminal includes / performs CSI reporting of N (N>1) operation modes among the M operation modes, it can be agreed that the corresponding CSI report occupies O CPU =N CPUs Here, the specific frequency / time resource may be, for example, an FDM HSNA resource configuration or a resource configuration for sub-band non-overlapping full duplex (SBFD).

[0739] When a terminal performs CSI reporting in consideration of multiple operating modes, the base station may configure or instruct the terminal to initialize the already occupied CPU, taking into account the complexity of the terminal, through separate higher-layer signaling (F1AP, RRC, MAC CE) or L1 signaling (DCI). Here, initialization may mean, for example, setting the CPU occupancy to "0 (zero)" before newly derived (calculated) CSI.

[0740] Third embodiment: CSI reference resource / valid DL time slot determination method considering operation mode

[0741] A third exemplary embodiment of the present disclosure will describe a CSI reference resource and a valid DL time slot determination method considering various operation modes.

[0742] In an exemplary embodiment of the present disclosure, the terminal is guaranteed to derive (calculate) the CSI for each operating mode after receiving at least one CMR and / or IMR for each operating mode. For example, the terminal is guaranteed to receive at least one CMR / IMR and perform CSI reporting associated therewith at a time after a specific operating mode is applied. In this case, the time after the specific operating mode can be, for example, the time after applying a provided DL Tx Power Adjustment MAC CE or receiving a provided DL Tx Power Adjustment MAC CE. When the above conditions are not met, the terminal may omit CSI reporting.

[0743] As another example, the terminal may be guaranteed to receive at least one CMR / IMR and perform CSI reporting at a specific time before the CSI reference resource for CSI reporting in a specific operating mode. For example, the specific time before the CSI reference resource may be n time slots before the CSI reference resource to which DL TX power adjustment is applied. If the above conditions are not met, the terminal may omit CSI reporting.

[0744] In an exemplary embodiment of the present disclosure, when DRX is configured (in a DRX period), it is possible to ensure that the terminal does not consider a separate operation mode. For example, considering the DL TX power adjustment provided in the DRX period, it is possible to ensure that the terminal does not perform CSI reporting.

[0745] In an exemplary embodiment of the present disclosure, when the operation mode applied in the CSI reference resource and the operation mode associated with the corresponding CSI reporting configuration are different from each other, it can be stipulated that the terminal does not consider the corresponding time slot as a valid time slot. For example, when the IAB-DU / -MT simultaneous operation mode (or multiplexing mode (e.g., TDM / FDM / SDM)) applied to a certain time slot is different from the simultaneous operation mode configuration (or multiplexing mode) value associated with the CSI reporting configuration, the terminal may not consider the corresponding time slot as a valid time slot.

[0746] Frequency resources corresponding to the following assumptions 1) to 3) may all have different values.

[0747] 1) Frequency resources allocated to PDSCH.

[0748] 2) Frequency resources configured as CSI reporting bands (eg, wideband CSI, sub-band CSI).

[0749] 3) Frequency resources allocated to a specific operation mode (eg, 3GPP Rel-17 frequency domain HSNA configuration for an RB set or RB set group, frequency resource configuration for XDD and FD, etc.).

[0750] The base station can configure which of these standards the terminal uses to derive CSI. In this case, the frequency resources configured as CSI reporting candidate bands in assumption 2) may be a list of one or more RB sets or RB set groups, and the base station can configure / select one or more RB sets or RB set groups in the list so that actual CSI is derived for the configured / selected one or more RB sets or RB set groups.

[0751] Various frequency resource configurations / allocations may have different priorities, and when deriving CSI, the terminal may derive CSI for the frequency resource with the highest priority at the corresponding time (eg, based on the time slot of the CSI reference resource).

[0752] For example, for resources transmitting cell-specific information such as SIB, assumption 2) may have a higher priority than assumption 3).

[0753] As another example, if the operating mode indicator (e.g., DCI format 2_5 or a provided DL Tx transmit power adjustment MAC CE) indicates a specific operating mode, assumption 3) may have a higher priority than assumption 2). Here, an example of a case where the operating mode indicator indicates a specific operating mode may be a case where, according to 3GPP Rel-17, AI is indicated as "available" for frequency domain soft resources, and a PDSCH EPRE adjustment value having a specific value other than 0 is indicated for the resource.

[0754] Fourth exemplary embodiment:

[0755] A fourth exemplary embodiment of the present disclosure will describe a method for selecting a CMR and an IMR and generating and reporting CSI in consideration of various operation modes.

[0756] Figure 26 is a conceptual diagram for describing CSI reporting in a first operation mode according to an exemplary embodiment of the present disclosure.

[0757] Reference Figure 26 , the horizontal axis represents time, and the vertical axis represents frequency. Therefore, specific resources, such as symbols or time slots, can be allocated by the base station to the terminal based on frequency resources and time resources. According to the present disclosure, specific symbols or time slots can be allocated as resources for CSI measurement or for CSI reporting.

[0758] The base station may configure / allocate at least one CMR and / or IMR for channel or interference measurement to the terminal, as indicated by reference numerals 2600, 2620, and 2630. In addition, the base station may configure / allocate uplink resources (PUSCH to PUCCH) for reporting CSI generated based on the channel or interference measurement to the terminal, as indicated by reference numeral 2610. In this case, the terminal may determine the CSI reference resource 2605 used as the basis for CSI generation according to the above method. The terminal may determine the transport block size (TBS) (2625) based on the number of REs that can be transmitted as data in the time slot determined by the CSI reference resource according to one of the above rules, and use the determined TBS in CSI derivation.

[0759] exist Figure 26 In the example of , the time that a CSI report occupies one or more CPUs can be defined as the time from the first OFDM symbol occupied by the most recent CMR and / or IMR preceding the CSI reference resource of the CSI report to the last OFDM symbol occupied by the uplink channel containing the CSI report. Here, the uplink channel can be either PUSCH or PUCCH. In addition, the number of CMRs and / or IMRs reflected when generating CSI can be limited to the most recent CMR or IMR 2620 using the above-mentioned time domain measurement restriction configuration. In this case, the time domain measurement restriction configuration can correspond to the higher-layer parameters timeRestrictionForChannelMeasurements or timeRestrictionForInterferenceMeasurements.

[0760] As another example, if there is no previous valid CMR and / or IMR, the number of CMRs and / or IMRs reflected when generating CSI may be limited to the most recent CMR or IMR (2620). As another example, the number of CMRs and / or IMRs reflected when generating CSI may include the most recent CMR and the previous CMR or the most recent IMR and the previous IMR (2630) configured according to the time domain measurement restriction described above.

[0761] For example, when the terminal measures CMR configured based on periodic NZP CSI-RS or semi-persistent NZP CSI-RS and generates CSI without applying timeRestrictionForChannelMeasurements, the terminal can use the (weighted) average of the channel measured at two or more valid NZP CSI-RS transmission times.

[0762] Similarly, when the terminal measures the IMR configured based on periodic NZP CSI-IM or semi-persistent NZP CSI-IM and generates CSI without applying timeRestrictionForInterferenceMeasurements, the terminal can use the (weighted) average of the channel measured at two or more valid NZP CSI-RS transmission times.

[0763] Figure 27 is a conceptual diagram for describing a case of CSI reporting in an environment where a first operation mode and a second operation mode coexist according to an exemplary embodiment of the present disclosure.

[0764] Reference Figure 27 , the horizontal axis represents time, and the vertical axis represents frequency. Figure 27 Four time periods are shown to illustrate the coexistence of two operating modes. The four time periods may include a first time period 2720 using the SBFD scheme, a second time period 2722 using the TDD scheme, a third time period 2724 using the SBFD scheme, and a fourth time period 2726 using the TDD scheme. In the following description, time periods 2720, 2722, 2724, and 2726 will be described using the same names as the corresponding operating modes. For example, since the first and third time periods use the SBFD scheme, they will be described as "SBFD 2720" and "SBFD 2724," respectively. Similarly, since the second and fourth time periods use the TDD scheme, they will be described as "TDD 2722" and "TDD 2726," respectively. Therefore, in the following description, SBFD 2720 is the first time period and may refer to a time period in which the SBFD scheme is configured as the operating mode.

[0765] In each of SBFD 2720 , TDD 2722 , SBFD 2724 , and TDD 2726 , CMR / IMR (CSI-RS, CSI-IM) 2720 , CSI reference resources 2705 , and PUSCH or CSI report 2710 on PUSCH may be transmitted.

[0766] The frequency band may be divided into a DL subband 2750, a UL subband 2752, and a DL subband 2754 only in SBFD 2720 and SBFD 2724 among SBFD 2720, TDD 2722, SBFD 2724, and TDD 2726. In this case, the UL subband 2752 may include a guard band as shown in the drawing.

[0767] although Figure 27Two operation modes, the SBFD scheme and the TDD scheme are shown as examples, but the present disclosure is not limited thereto. For example, in an exemplary embodiment of the present disclosure, the first operation mode may be one of the duplex modes such as TDD or FDD, and the second operation mode may be one of the enhanced duplex modes such as SBFD, full duplex (FD), or IAB DU / MT simultaneous operation mode. Figure 27 In the example of FIG, the first operating mode is TDD (i.e., 2722, 2726), and the second operating mode is SBFD (i.e., 2720, 2724). However, they may be replaced by or changed to the first and second operating modes described above. As described above, the second operating mode may include at least one DL sub-band 2750 and 2754, a UL sub-band 2752, and a UL sub-band 2752, and the UL sub-band 2752 may include a guard band. As another example, the guard band may be configured / allocated separately.

[0768] Will refer to Figure 27 Describes CSI reporting operations.

[0769] The base station may configure / allocate at least one CMR / IMR 2700 to the terminal for channel or interference measurement. Furthermore, the base station may configure / allocate a PUSCH or PSCCH 2710 to the terminal as an uplink resource for reporting CSI generated based on the channel or interference measurement. In this case, the terminal may determine the CSI reference resource 2705 used as the basis for CSI generation according to the above-described method. The terminal may determine the TBS based on the number of REs that can be transmitted as data in the time slot determined by the CSI reference resource 2705 according to one of the above-described rules, and use this to derive CSI.

[0770] exist Figure 27 In the example, it is assumed that the operating mode assumed for CSI reporting is determined by the operating mode configured / allocated / indicated at the time overlapping with the CSI reference resource of the CSI report. In actual applications, this is not limited to this, and various methods of the above-mentioned first to third exemplary embodiments can be applied. Accordingly, the following content can also be appropriately changed and applied.

[0771] exist Figure 27In the example of FIG27 , for a CSI report 2734 that refers to a CSI reference resource existing in a first operation mode (TDD) period 2722, a TBS (2734) may be determined by considering the frequency (time) resources used for the first operation mode. In this case, resources measured in a time period to which the same operation mode (i.e., the first operation mode - TDD) among the CMRs and / or IMRs associated with the CSI report is allocated may be determined as valid CMRs or IMRs (2732). On the other hand, resources measured in a time period to which a different operation mode (i.e., the second operation mode - SBFD) among the CMRs and / or IMRs associated with the CSI report is allocated may be determined as invalid CMRs or IMRs (2730).

[0772] For example, it may be stipulated / constrained that the terminal does not reflect measurement values ​​from invalid CMRs and / or IMRs when generating CSI, thereby improving the accuracy of the corresponding CSI report.

[0773] As another example, the base station can configure the terminal through higher-layer parameters to not reflect measurement values ​​from invalid CMRs or IMRs when generating CSI, or can indicate this to the terminal through physical layer signaling, thereby improving the accuracy of the corresponding CSI report.

[0774] As another example, the terminal may report to the base station the measurement values ​​from the invalid CMR or IMR when generating CSI, thereby enabling the base station to predict the accuracy of the corresponding CSI report.

[0775] In the above example, even when the operation mode of the CMR or IMR and the operation mode of the CSI reference resource are the same (for example, both exist in the second operation mode (SFBD) period), if the direction of some frequency resources assigned to the CMR and / or IMR and the direction of some frequency resources assigned to the CSI reference resource are different, the terminal (or base station) can determine that the CMR or IMR and the CSI reference resource are assigned different operation modes. Here, as an example of the direction of some frequency resources assigned to the CMR and / or IMR, PRB#1 in the SBFD period occupied by the CMR can be allocated to the DL subband. In addition, as an example of the direction of some frequency resources assigned to the CSI reference resource, PRB#1 in the SBFD period occupied by the CSI reference resource can be allocated to the UL subband or the guard band.

[0776] When determining the validity of a CMR and / or IMR according to the above method, if the time interval between the start time of the operating mode period 2724 and the CSI reference resource 2762 is short (for example, when they belong to the same time slot), the most recent valid CMR and / or IMR may exist in the previous period 2720 of the same operating mode, and as a result, the time that the (one or more) CPUs are occupied by the corresponding CSI report may become very long (2760). This may significantly reduce the CPU usage efficiency of the terminal and, at the same time, may mean that the accuracy of the corresponding CSI report may also be lower. Therefore, the terminal may omit / discard the CSI report according to one of the following methods.

[0777] Method 4A-1: The base station may configure a threshold value for the terminal via a high-layer parameter, and if the CPU occupancy time of the CSI report for a specific operating mode is longer than the threshold value, the terminal may omit the CSI report. Here, considering that the accuracy of the CSI report required for each operating mode may be different, a threshold value may be set for each operating mode. As another example, the threshold value may be configured for each CSI report. As another example, the threshold value may be configured for each CMR and / or IMR. In this case, configuration may be performed for a frequency range (e.g., FR1, FR2, FR2-1, FR2-2, etc., proposed by 3GPP, a BWP, a CC, a frequency band, or a frequency band combination). In other words, by limiting the system to a specific frequency resource group, freedom in system operation can be ensured. As a result, this may lead to increased freedom in system operation by configuring for each specific frequency resource group.

[0778] Method 4A-2: If the CPU usage of CSI reporting for a specific operating mode exceeds a predetermined threshold, the terminal may omit CSI reporting. Considering that the accuracy of CSI reporting required for each operating mode may vary, a threshold may be agreed upon for each operating mode or each CSI reporting type. Here, CSI reporting type may refer to periodic, semi-persistent, or aperiodic CSI reporting.

[0779] As another example, given that the accuracy of CSI reporting required for each operating mode may be different, a threshold value may be agreed upon for each type of CMR and / or IMR resource. Here, the type of CMR and / or IMR resource may refer to periodic, semi-persistent, aperiodic NZP CSI-RS, and / or CSI-IM.

[0780] In the above example, the frequency range can be FR1, FR2, FR2-1, FR2-2, etc., a BWP, CC, a frequency band, or a frequency band combination proposed by 3GPP. In other words, by limiting the frequency resource group to a specific frequency resource group, system operation freedom can be ensured. As a result, this can lead to increased system operation freedom by enabling configuration for each specific frequency resource group.

[0781] Method 4A-3: The terminal may report its preferred threshold value to the base station and may determine the actual threshold value to be applied based on the reported threshold value or one of the threshold values ​​individually configured by the base station. Subsequently, if the CPU usage of CSI reporting for a particular operating mode is longer than the actual threshold value, the terminal may omit CSI reporting. Given that the accuracy of CSI reporting required for each operating mode may vary, the threshold value reported by the terminal may be reported for each operating mode. For example, given that the accuracy of CSI reporting required for each operating mode may vary, the threshold value reported by the terminal may be reported for each CSI reporting type. Here, the CSI reporting type may be periodic, semi-persistent, or aperiodic CSI reporting.

[0782] As another example, considering that the CSI accuracy required for each operating mode may be different, the threshold reported by the terminal may be reported for each type of CMR and / or IMR. Here, the type of CMR and / or IMR may be static, semi-persistent, aperiodic NZP CSI-RS, and / or CSI-IM.

[0783] Furthermore, in each of the above examples, the frequency range for CSI reporting can be FR1, FR2, FR2-1, FR2-2, etc., as proposed by 3GPP, a BWP, CC, a frequency band, or a combination of frequency bands. In other words, by limiting the frequency range to a specific frequency resource group, system operation flexibility can be ensured. Consequently, this can lead to increased system operation flexibility by enabling configuration for each specific frequency resource group.

[0784] In the above-mentioned methods 4A-1 to 4A-3, the condition "the CPU occupancy time of the CSI report for a specific operation mode is longer than a threshold" is an example for ease of description, and in actual application, it can be applied to be modified to the interval between the CMR and / or IMR associated with the CSI report (for example, the first symbol of the CMR and / or IMR) and the CSI reference resource of the CSI report, or the interval between the CMR and / or IMR associated with the CSI report (for example, the first symbol of the CMR and / or IMR) and the nearest CMR or IMR before the CSI reference resource of the CSI report.

[0785] As Figure 27In another example, in the case of a CSI report referring to a CSI reference resource 2744 present in the second operation mode period SBFD 2724, a TBS may be determined taking into account the frequency (time) resources used for the second operation mode (2744). In this case, resources measured in a time period to which the same operation mode (i.e., the second operation mode - SBFD) among the CMR and / or IMR associated with the CSI report is allocated may be determined as valid CMR and / or IMR (2742). On the other hand, resources measured in a time period allocated to a different operation mode (i.e., the first operation mode - TDD) among the CMR and / or IMR associated with the CSI report may be determined as invalid CMR or IMR (2740).

[0786] In the above example, even when the operation mode of the CMR and / or IMR and the operation mode of the CSI reference resource are the same (for example, they both exist in the second operation mode (SBFD) period), if the directions of some frequency resources assigned to the CMR and / or IMR and the directions of some frequency resources assigned to the CSI reference resource are different, it can be determined that the CMR and / or IMR and the CSI reference resource are assigned different operation modes. For example, the directions of some frequency resources assigned to the CMR and / or IMR may correspond to a case where PRB#1 in the SBFD period occupied by the CMR is allocated as a DL subband, and the directions of some frequency resources assigned to the CSI reference resource may correspond to a case where PRB#1 in the SBFD period occupied by the CMR is allocated as a UL subband or a guard band.

[0787] In the above example, when the CSI reference resources of the CSI report exist within the second operating mode period, some or all of the frequency resources of the valid CMR and / or IMR 2742 associated with the CSI report may not be included in the DL subband 2750 or 2754 allocated for the second operating mode. This can be understood as a situation where, when the CSI reference resources of the CSI report exist within the second operating mode period, some or all of the frequency resources of the valid CMR and / or IMR 2742 associated with the CSI report overlap with the UL subband or guard band 2752 allocated for the second operating mode. In this case, the terminal may apply one of the following methods to the frequency resources of the valid CMR and / or IMR 2742 that are not all included in the DL subband 2750 or 2754 allocated for the second operating mode.

[0788] Method 4B-1: The terminal may be required to not generate CSI based on time-domain channel measurements of CMR and / or IMR that meet the above conditions. This takes into account that time-domain channel measurements include channel characteristics for the entire frequency resources occupied by CMR and / or IMR.

[0789] Method 4B-2: When generating CSI, the terminal may exclude measurement values ​​of REs, RBs, or subbands not included in the SBFD DL subband from REs, RBs, or subbands occupied by NZP CSI-RS and / or CSI-IM (e.g., NZP CSI-RS RB sets / groups configured in units of 4 RBs) by agreement or through higher-layer parameter configuration.

[0790] Method 4B-3: When generating CSI, the terminal may exclude measurement values ​​of REs, RBs, or subbands included in the SBFD UL subband or guard band from REs, RBs, or subbands occupied by NZP CSI-RS and / or CSI-IM (e.g., NZP CSI-RS RB sets / groups configured in units of 4 RBs) by agreement or through higher-layer parameter configuration.

[0791] Method 4B-4: Based on measurements of NZP CSI-RS and / or CSI-IM REs, RBs, or subbands not included in the SBFD DL subband (e.g., NZP CSI-RS RB sets / groups configured in units of 4 RBs), the terminal may be configured by agreement or through higher-layer parameters to drop or omit CSI report(s). The omitted CSI report(s) may be limited to subband CSI reports including the corresponding REs, RBs, or subbands, or may be all CSI reports associated with the corresponding time (e.g., wideband CSI + subband CSI).

[0792] Method 4B-5: Based on measurements of NZP CSI-RS and / or CSI-IM REs, RBs, or subbands (e.g., NZP CSI-RS RB sets / groups configured in units of 4 RBs) included in an SBFD UL subband or guard band, the terminal may be configured by agreement or through higher-layer parameters to drop or omit CSI report(s). The omitted CSI report(s) may be limited to subband CSI reports including the corresponding REs, RBs, or subbands, or may be all CSI reports associated with the corresponding time (e.g., wideband CSI + subband CSI).

[0793] For measurement / reference resources associated with CSI reporting in a given duplex operation mode, the terminal may apply at least one of the following.

[0794] Option 1-1 (associated with Option 1): CSI-RS / CSI-IM opportunities that do not have the same duplex mode configured for an associated CSI report may not be considered for CSI generation for that CSI report.

[0795] Option 1-2 (associated with Option 1): CSI-RS / CSI-IM REs / RBs / subbands overlapping with uplink subbands or guard bands for SBFD may not be considered for CSI generation for CSI reports configured on downlink subbands for SBFD.

[0796] Option 2-1 (associated with Option 2): CSI-RS / CSI-IM opportunities that do not have the same duplex mode as the duplex mode of the CSI reference resources of the associated CSI report may not be considered for CSI generation of the CSI report.

[0797] Option 2-2 (associated with Option 2): CSI-RS / CSI-IM REs / RBs / subbands overlapping with uplink subbands or guard bands for SBFD may not be considered for CSI generation of CSI reference resources on downlink subbands for SBFD.

[0798] When actually implementing a base station and / or terminal (e.g., an IAB node, an IAB-DU, an IAB-MT, a relay, a relay-RU, a relay-MT), the above exemplary embodiments do not need to be mutually exclusive, and combinations of various exemplary embodiments may be considered. For example, the operating mode for CSI derivation (calculation) may be determined according to the first exemplary embodiment of the present disclosure, and (one or more) active time slots and / or (one or more) CSI reference time slots may be determined according to the third exemplary embodiment of the present disclosure.

[0799] Fifth embodiment: CPU occupancy time calculation method considering SBFD subband

[0800] A fifth exemplary embodiment of the present disclosure provides a method for managing / calculating a terminal's CPU occupancy when one or more subbands are configured / allocated within the same time resource for a specific operating mode, such as SBFD (Subband Non-Overlapping Full Duplex). Hereinafter, a method for calculating the CPU occupancy time for an SBFD subband will be discussed with reference to the accompanying drawings.

[0801] Figure 28 is a conceptual diagram for describing a subband CSI reporting operation according to an exemplary embodiment of the present disclosure.

[0802] Reference Figure 28 , shows an example in which a base station configures one or more DL subbands to a specific terminal within a certain time resource period for a specific operation mode such as SBFD.

[0803] To obtain CSI for a DL subband, the base station may configure the terminal with a CSI-RS, CSI-IM, and CSI report that includes two or more DL subbands. This may mean that the frequency resource configuration for the CSI-RS, CSI-IM, and CSI report is performed across two or more of the allocated DL subbands.

[0804] In this case, in an exemplary embodiment, the number of CPUs occupied by the CSI report may be determined as K (K ≥ 1) according to the aforementioned CPU occupancy calculation method, without being affected by the number of overlapping DL subbands N. As another example, the number of CPUs occupied by the CSI report may be increased to "N*K" by a constant factor such as doubling, tripling, etc., or increased by one or two, taking into account not only K (K ≥ 1) according to the aforementioned CPU occupancy calculation method but also the number of overlapping DL subbands N. In this case, the condition for occupying more CPUs than K may be determined by one of the following methods.

[0805] 1) It can be implicitly determined based on whether the base station allows the terminal to report different CSI components for each DL subband. Here, the CSI components can be, for example, CQI, PMI, RI, etc.

[0806] 2) It can be explicitly determined through separate higher layer signaling of the base station.

[0807] 3) It can be explicitly determined by a separate indicator included in the CSI reporting indication of the base station. Here, the CSI reporting indication may be, for example, an aperiodic CSI report.

[0808] The base station may configure the CSI-RS, CSI-IM, and / or CSI report for each DL subband to the terminal in order to obtain the CSI of the DL subband. This may mean that the frequency resource configuration for the CSI-RS, CSI-IM, and / or CSI report is included in only one of the allocated DL subbands. In this case, according to an exemplary embodiment of the present disclosure, the number of CPUs occupied by the individual CSI reports may be determined as K (K ≥ 1) according to the above-mentioned CPU occupancy calculation method, without being affected by the number N of overlapping DL subbands. In other words, the CPU occupancy of the corresponding operating mode at the corresponding time may be the total number of CPUs occupied by the CSI reports of the corresponding subband.

[0809] If the total number of CPUs required by the terminal is greater than the maximum number of CPUs of the terminal, the terminal may consider the above CSI priority Pri iCSIThe (y, k, c, s) method is applied to select the CSI to be actually reported and the remaining CSI is omitted. When performing subband CSI reporting, in addition to the above-mentioned CSI priority, the terminal eliminates ambiguity in selecting (or discarding) CSI by additionally applying at least one of the following rules.

[0810] Rule 1: CSI for subbands containing frequency resources with lower indices (e.g., PRB, RBG index, etc.) may have a higher priority than CSI for subbands containing frequency resources with higher indices. The opposite is also possible. For example, CSI for subbands containing frequency resources with higher indices may have a higher priority than CSI for subbands containing frequency resources with lower indices.

[0811] Rule 2: In the case of CSI reporting for two or more subbands in a specific mode (e.g., SBFD, etc.), priority according to reportConfigID is not applied, and CSI including CQI with a lower (or higher) index among CSIs has a higher priority. Here, not applying priority according to reportConfigID may mean not applying the factor s in the following equation 7.

[0812] [Equation 7]

[0813] Pri iCSI (y,k,c,s)=2·N cells ·M s y+N cells ·M s k+M s c+s

[0814] Rule 3: CSI reports for two or more subbands of the same mode (eg, SBFD, etc.) may be assumed to have the same priority, and when one of them is dropped, the remaining reports are also dropped.

[0815] Figure 29 is a block diagram illustrating a base station according to an exemplary embodiment of the present disclosure.

[0816] Reference Figure 29 , the base station may include a base station processing unit 2900, a base station sending unit 2905 and a base station receiving unit 2910. Figure 29 The components are shown as exemplary embodiments, and the base station may further include (one or more) additional components depending on the exemplary embodiments of the present disclosure or the intention of a telecommunication service operator.

[0817] For example, although not in Figure 29Although shown in FIG, the base station may further include a memory. In addition, the base station may further include a wired / wireless interface for connecting to an external device. In addition, the base station may further include an interface that allows an operator to recognize the operation of the base station. In addition to the above forms, the base station may include (one or more) additional components depending on the needs of the telecommunications service operator or manufacturer.

[0818] The base station processing unit 2900 may perform determination and processing for the overall operation of the base station according to the exemplary embodiments of the present disclosure described above. For example, the base station processing unit 2900 may determine the operation mode or control the transmission of information related to the determined operation mode to the terminal through high-layer signaling or physical layer signaling. In addition, if the base station processing unit 2900 has an additional memory, the base station processing unit 2900 may control the storage of information in the memory. The base station processing unit 2900 may control the receiving operation of the base station receiving unit 2910 and the transmitting operation of the base station transmitting unit 2905. In particular, the base station processing unit 2900 may configure / instruct CSI reporting and operation mode, and may determine the CSI reporting and operation mode according to the reference signaling. Figures 24 to 27 The CSI reported by the terminal is processed using at least one of the methods described.

[0819] The base station transmitting unit 2905 may transmit data received from the base station processing unit 2900 in a downlink under the control of the base station processing unit 2900. The base station receiving unit 2910 may receive an uplink channel / signal under the control of the base station processing unit 2900 and provide it to the base station processing unit 2900.

[0820] Figure 30 is a block diagram illustrating a terminal according to an exemplary embodiment of the present disclosure.

[0821] Reference Figure 30 , the terminal may include a terminal processing unit 3000, a terminal sending unit 3005 and a terminal receiving unit 3010. Figure 30 The components are shown as exemplary embodiments, and the terminal may further include additional component(s) depending on the exemplary embodiments of the present disclosure or the intention of a telecommunication service operator.

[0822] For example, although not in Figure 30 , but the terminal may also include a memory. In addition, the terminal may also include a wired / wireless interface for connecting to an external device. In addition, the terminal may also include an interface that allows a user or operator to identify the operation of the terminal. In addition to the above forms, the terminal may include (one or more) additional components depending on the needs of the telecommunications service operator or manufacturer.

[0823] The terminal processing unit 300 may perform determination and processing for the overall operation of the terminal according to the exemplary embodiments of the present disclosure described above. For example, the terminal processing unit 3000 may control uplink transmission and / or downlink reception according to at least one of the operating modes described in the present disclosure. In addition, the terminal processing unit 3000 may receive information related to the operating mode from the base station through high-layer signaling or physical layer signaling. In addition, if the terminal processing unit 3000 has an additional memory, the terminal processing unit 3000 may control the storage of information in the memory. The terminal processing unit 3000 may control the receiving operation of the terminal receiving unit 3010 and the sending operation of the terminal sending unit 3005. In particular, the terminal processing unit 3000 may control the receiving operation of the terminal receiving unit 3010 and the sending operation of the terminal sending unit 3005 according to the reference Figures 24 to 27 At least one of the described methods generates and reports CSI to a base station based on the base station's CSI report and operating mode configuration / indication.

[0824] The terminal transmitting unit 3005 may also transmit data received from the terminal processing unit 3000 in uplink under the control of the terminal processing unit 3000. The terminal receiving unit 3010 may receive a downlink channel / signal under the control of the terminal processing unit 3000 and provide it to the terminal processing unit 3000.

[0825] The operation of the method according to the exemplary embodiment of the present disclosure can be implemented as a computer-readable program or code in a computer-readable recording medium. The computer-readable recording medium may include all kinds of recording devices for storing data that can be read by a computer system. In addition, the computer-readable recording medium can store and execute a program or code that can be distributed in a computer system connected via a network and read by a computer in a distributed manner.

[0826] The computer readable recording medium may include a hardware device specially configured to store and execute program commands, such as ROM, RAM or flash memory. The program commands may include not only machine language codes created by a compiler, but also high-level language codes that can be executed by a computer using an interpreter.

[0827] Although some aspects of the present invention have been described in the context of equipment, the aspects may indicate corresponding descriptions according to the method, and blocks or devices may correspond to the steps of the method or the features of the steps. Similarly, the aspects described in the context of the method may be expressed as features of corresponding blocks or items or corresponding devices. Some or all steps of the method may be performed by (or using) hardware devices such as microprocessors, programmable computers or electronic circuits. In certain embodiments, one or more of the most important steps of the method may be performed by such devices.

[0828] In some exemplary embodiments, a programmable logic device such as a field programmable gate array (FPGA) may be used to perform some or all of the functions of the methods described herein. In some exemplary embodiments, a field programmable gate array (FPGA) may operate in conjunction with a microprocessor to perform one of the methods described herein. Typically, the methods are preferably performed by a hardware device.

[0829] The description of the present disclosure is essentially exemplary only, and therefore, variations that do not depart from the essence of the present disclosure are intended to fall within the scope of the present disclosure. These variations should not be considered as departing from the spirit and scope of the present disclosure. Therefore, it will be understood by those skilled in the art that various changes can be made in form and detail without departing from the spirit and scope defined by the appended claims.

Claims

1. A terminal method, comprising: receiving, from a base station, operating mode configuration information for a first operating mode and a second operating mode; receiving, from a base station, resource allocation information for reporting channel state information CSI measured based on the operation mode configuration information; Determine CSI reference resources based on pre-configured CSI generation criteria; measuring first CSI received from a base station based on the operation mode configuration information; identifying validity of a measured first CSI; as well as Based on the result of the identification, a CSI report reflecting one or more valid CSI measurement values ​​is sent to the base station, Here, the valid CSI corresponds to a case where an operation mode when performing measurement of the first CSI is equal to an operation mode when reporting CSI based on the CSI reference resource.

2. The method according to claim 1, wherein The first operation mode is one of a sub-band full-duplex (SBFD) mode or a full-duplex (FD) mode, and the second operation mode is one of a time division duplex (TDD) mode or a frequency division duplex (FDD) mode.

3. The method according to claim 2, wherein: In the first operation mode, first CSI is measured in each of the one or more subbands.

4. The method according to claim 3, wherein: In transmitting the CSI report, when only some of the one or more valid CSI measurement values ​​can be reported, the one or more valid CSI measurement values ​​to be transmitted are determined based on a predetermined priority.

5. The method according to claim 1, further comprising: receiving first configuration information for configuring at least one of a channel measurement resource CMR or an interference measurement resource IMR from a base station, When the first configuration information indicates CMR, each of the first CSIs is configured as a non-zero power NZP CSI-reference signal RS, and when the first configuration information indicates IMR, each of the first CSIs is configured as an NZP CSI-RS or a zero power ZP CSI-RS.

6. The method according to claim 5, further comprising: One or more invalid CSI measurement values ​​are excluded from the CSI report based on a result of the identification, wherein the one or more invalid CSI measurement values ​​correspond to a case where an operation mode when performing CMR or IMR measurement is different from an operation mode when sending a CSI report based on a CSI reference resource.

7. The method according to claim 5, wherein: At least one of the CMR or the IMR is periodically, semi-persistently, or aperiodically received, and the CSI report is periodically, semi-persistently, or aperiodically sent to the base station.

8. The method according to claim 1, wherein A transport block size TBS for CSI reporting is determined based on at least one of a subband frequency resource or a subband time resource applied to an operation mode of a CSI reference resource.

9. A base station method, comprising: sending, to the terminal, operating mode configuration information for a first operating mode and a second operating mode; Sending resource allocation information to the terminal for receiving a channel state information (CSI) report measured based on the operation mode configuration information; Sending the first CSI and CSI reference resource to the terminal based on the operation mode configuration information; as well as receiving a CSI report from the terminal based on the resource allocation information, The first operation mode is one of a sub-band full-duplex (SBFD) mode or a full-duplex (FD) mode, and the second operation mode is one of a time division duplex (TDD) mode or a frequency division duplex (FDD) mode.

10. The method according to claim 9, wherein: In a first operating mode, first CSI is transmitted in each of one or more subbands.

11. The method according to claim 9, further comprising: Sending first configuration information for configuring at least one of a channel measurement resource CMR or an interference measurement resource IMR to the terminal, When the first configuration information indicates CMR, each of the first CSIs is configured as a non-zero power NZP CSI-reference signal RS, and when the first configuration information indicates IMR, each of the first CSIs is configured as an NZP CSI-RS or a zero power ZP CSI-RS.

12. The method according to claim 11, wherein At least one of the CMR or the IMR is periodically, semi-persistently, or aperiodically transmitted to the terminal, and the CSI report is periodically, semi-persistently, or aperiodically received from the terminal.

13. A terminal comprising a processor, wherein: The processor causes the terminal to perform the following operations: receiving, from a base station, operating mode configuration information for a first operating mode and a second operating mode; receiving, from a base station, resource allocation information for reporting channel state information CSI measured based on the operation mode configuration information; Determine CSI reference resources based on pre-configured CSI generation criteria; measuring first CSI received from a base station based on the operation mode configuration information; identifying validity of a measured first CSI; as well as Based on the result of the identification, a CSI report reflecting one or more valid CSI measurement values ​​is sent to the base station, Here, the valid CSI corresponds to a case where an operation mode when performing measurement of the first CSI is equal to an operation mode when reporting CSI based on the CSI reference resource. The terminal according to claim 13 , wherein: The first operation mode is one of a sub-band full-duplex (SBFD) mode or a full-duplex (FD) mode, and the second operation mode is one of a time division duplex (TDD) mode or a frequency division duplex (FDD) mode. The terminal according to claim 14 , wherein: The processor further causes the terminal to perform, in a first operation mode, measuring first CSI in each of one or more subbands. The terminal according to claim 15 , wherein: The processor further causes the terminal to perform: in transmitting the CSI report, when only some of the one or more valid CSI measurement values ​​can be reported, determining one or more valid CSI measurement values ​​to be transmitted based on a predetermined priority. The terminal according to claim 13 , wherein: The processor further causes the terminal to execute: receiving first configuration information for configuring at least one of a channel measurement resource CMR or an interference measurement resource IMR from a base station; When the first configuration information indicates CMR, each of the first CSIs is configured as a non-zero power NZP CSI-reference signal RS, and when the first configuration information indicates IMR, each of the first CSIs is configured as an NZP CSI-RS or a zero power ZP CSI-RS. The terminal according to claim 17 , wherein: The processor further causes the terminal to execute: excluding one or more invalid CSI measurement values ​​from the CSI report based on the result of the identification; The one or more invalid CSI measurement values ​​correspond to a situation where an operation mode when performing CMR or IMR measurement is different from an operation mode when sending a CSI report based on a CSI reference resource. The terminal according to claim 17 , wherein: The processor further causes the terminal to execute: receiving at least one of a CMR or an IMR periodically, semi-persistently, or aperiodically, and The CSI reports are sent to the base station periodically, semi-persistently or aperiodically.

20. The terminal according to claim 13, wherein A transport block size TBS for CSI reporting is determined based on at least one of a subband frequency resource or a subband time resource applied to an operation mode of a CSI reference resource.

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