Method and apparatus for transmitting and receiving signal in wireless communication system

Abstract

A terminal according to at least one embodiment of the embodiments disclosed in the present specification receives a channel state information (CSI) report configuration via high layer signaling, receives downlink control information (DCI) including information for a CSI request via a physical downlink control channel (PDCCH), and transmits the downlink control information (DCI) to the terminal via the PDCCH. And transmitting a CSI report related to the CSI request based on the condition for the valid CSI report being satisfied, in which the terminal may determine a Z value and a Z'value for determining whether the condition for the valid CSI report is satisfied only based on some (Z, Z ') candidate values among the (Z, Z') candidate values based on the list including the sub-configurations based on the CSI report.

Description

Technical Field

[0001] This disclosure relates to wireless communication systems, and more specifically, to a method and apparatus for transmitting or receiving downlink / uplink radio signals in a wireless communication system. Background Technology

[0002] Typically, wireless communication systems are evolving to provide communication services such as audio communication and data communication by covering a wider range of areas. Wireless communication is a multiple access system capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmission power, etc.). For example, a multiple access system can be any of the following: Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA).

[0003] Energy efficiency at base stations (BS) is considered important in wireless communication systems, including those under the 3rd Generation Partnership Project (3GPP), as it helps build environmentally friendly networks and reduces telecommunications companies' operating expenses (OPEX) by reducing carbon emissions. Specifically, with the introduction of 5G communications, which require higher transmission rates, BSs need to include a greater number of antennas and provide services through wider bandwidths and frequency bands, and the energy cost of BSs for this purpose has reached 20% of total OPEX. Against this backdrop, Network Energy Efficiency (NES) has been discussed in wireless communication standards, including 3GPP New Radio (NR) standards. Summary of the Invention

[0004] Technical issues

[0005] One object of this disclosure is to provide a method and apparatus for efficiently performing wireless signal transmission and reception processes. As an example, a method and apparatus for more efficiently performing the transmission and reception of CSI reports in an environment that supports a Channel State Information (CSI) report configuration including one or more sub-configurations for NES.

[0006] The purposes that can be achieved are not limited to those described above, and other purposes not described can be inferred from the following description.

[0007] Technical solution

[0008] According to one aspect of this disclosure, a method performed by a user equipment (UE) includes the following steps: receiving a channel state information (CSI) report configuration via higher-layer signaling; receiving downlink control information (DCI) including information for a CSI request via a physical downlink control channel (PDCCH); and sending a CSI report related to the CSI request based on satisfying conditions for a valid CSI report, wherein the UE determines whether the conditions for a valid CSI report are satisfied based on a Z value and a Z' value, the Z value being related to the time length from the last symbol of the PDCCH to the first symbol of the CSI report, and the Z' value being related to the time length from the last symbol of the channel state information-reference signal (CSI-RS) to the first symbol of the CSI report, and wherein the CSI report configuration includes a list of sub-configurations for individually configuring at least one of a CSI codebook, enabling a subset of CSI-RS antenna ports, a subset of CSI-RS resources, or power offset information for each sub-configuration, and the UE determines the Z value and Z' value only based on a subset of a plurality of (Z, Z') candidate values.

[0009] Based on the list of sub-configurations included in the CSI report configuration, the UE can determine the Z value and Z' value solely based on a third (Z, Z') candidate value that excludes the first (Z, Z') candidate value and the second (Z, Z') candidate value for each of a plurality of conditions related to CSI for no more than 4 CSI-RS ports for a single resource.

[0010] The multiple conditions include a first condition, which can be satisfied if: (i) the number associated with the subcarrier spacing (SCS) is less than a threshold; (ii) CSI is triggered when 0 CSI processing units (CPUs) are occupied; (iii) the physical uplink shared channel (PUSCH) used to send the CSI report does not include either a transport block or a HARQ-ACK; (iv) the CSI report does not include a CSI-RS resource indicator (CRI) and has a wideband frequency granularity of up to 4 CSI-RS ports or fewer for a single resource; and (v) the codebook type is a single panel or the report content is configured as a CRI-rank indicator-channel quality indicator (CRI-CQI).

[0011] The second condition is among several conditions and can be met if: (iv) the CSI report does not include a CSI-RS Resource Indicator (CRI) and has a wideband frequency granularity of up to 4 CSI-RS ports or fewer for a single resource, and (v) the codebook type is a single panel or the report content is configured as a cri-rank indicator-channel quality indicator (cri-RI-CQI).

[0012] Multiple (Z, Z') candidate values ​​can include a first (Z, Z') candidate value, a second (Z, Z') candidate value greater than the first (Z, Z') candidate value for the same parameter set, and a third (Z, Z') candidate value greater than the first (Z, Z') candidate value and the second (Z, Z') candidate value for the same parameter set. Based on the list of sub-configurations included in the CSI report configuration, the UE can determine the Z value and Z' value based solely on the third (Z, Z') candidate value.

[0013] The Z value can be correlated with the time length from the end of the last symbol of the PDCCH to the start of the cyclic prefix (CP) of the first symbol in the CSI report, and the Z' value can be correlated with the time length from the end of the last symbol of the CSI-RS resource to the start of the CP of the first symbol in the CSI report.

[0014] Based on the CSI report configuration, which includes a list of sub-configurations, the UE can determine the Z value and Z' value based solely on Table A below.

[0015] [Table A]

[0016] According to another aspect of this disclosure, a non-transitory recording medium can be provided, which is configured to store instructions that, when executed by a processor of a UE, cause the UE to perform the methods described above.

[0017] According to another aspect of this disclosure, an apparatus includes: at least one memory configured to store instructions; and at least one processor configured to perform operations by executing the instructions, wherein the operations performed by the at least one processor include: receiving channel state information (CSI) report configuration via higher-layer signaling; receiving downlink control information (DCI) including information for a CSI request via a physical downlink control channel (PDCCH); and sending a CSI report related to a CSI request based on satisfying conditions for a valid CSI report, wherein the apparatus determines whether conditions for a valid CSI report are met based on Z-values ​​and Z' values. For a valid CSI report, the Z value is related to the time length from the last symbol of the PDCCH to the first symbol of the CSI report, and the Z' value is related to the time length from the last symbol of the Channel State Information-Reference Signal (CSI-RS) to the first symbol of the CSI report. The CSI report configuration includes a list of sub-configurations for individually configuring at least one of the following: CSI codebook, enabling a subset of CSI-RS antenna ports, a subset of CSI-RS resources, or power offset information for each sub-configuration. The device determines the Z value and Z' value based only on a subset of the multiple (Z, Z') candidate values.

[0018] The device may also include a transceiver. The device may be a UE configured to operate in a wireless communication system.

[0019] The device can be a processing device configured to control a UE in a wireless communication system.

[0020] According to another aspect of this disclosure, a method performed by a base station (BS) includes the following steps: transmitting a Channel State Information (CSI) report configuration via higher-layer signaling; transmitting downlink control information (DCI) including information for a CSI request via a physical downlink control channel (PDCCH); and receiving a CSI report related to the CSI request based on satisfying conditions for a valid CSI report, wherein whether the conditions for a valid CSI report are satisfied is determined based on Z values ​​and Z' values, the Z value being related to the time length from the last symbol of the PDCCH to the first symbol of the CSI report, and the Z' value being related to the time length from the last symbol of the Channel State Information-Reference Signal (CSI-RS) to the first symbol of the CSI report, and wherein the CSI report configuration includes a list of sub-configurations for individually configuring at least one of CSI codebook, enabling a subset of CSI-RS antenna ports, a subset of CSI-RS resources, or power offset information for each sub-configuration, the Z value and Z' value being determined only based on a subset of (Z, Z') candidate values ​​from a plurality of (Z, Z') candidate values.

[0021] According to another aspect of this disclosure, a base station (BS) includes: at least one memory configured to store instructions; and at least one processor configured to perform operations by executing the instructions, wherein the operations performed by the at least one processor include: transmitting channel state information (CSI) report configuration via higher-layer signaling; transmitting downlink control information (DCI) including information for a CSI request via a physical downlink control channel (PDCCH); and receiving a CSI report related to a CSI request based on whether the conditions for a valid CSI report are met. The configuration is determined based on the Z value and Z' value. The Z value is related to the time length from the last symbol of the PDCCH to the first symbol of the CSI report, and the Z' value is related to the time length from the last symbol of the Channel State Information-Reference Signal (CSI-RS) to the first symbol of the CSI report. The configuration based on the CSI report includes a list of sub-configurations for individually configuring at least one of the following: the CSI codebook, the enablement of a subset of CSI-RS antenna ports, a subset of CSI-RS resources, or power offset information for each sub-configuration. The Z value and Z' value are determined based only on a subset of (Z, Z') candidate values ​​from a plurality of (Z, Z') candidate values.

[0022] Beneficial effects

[0023] According to the implementation method, the wireless signal transmission and reception process can be performed efficiently. As an example, the transmission and reception of CSI reports can be performed efficiently in an environment that supports Channel State Information (CSI) reporting configurations including one or more sub-configurations for Network Energy Saving (NES).

[0024] Other effects not described can be inferred from the following description. Attached Figure Description

[0025] Figure 1 The physical channel used in the 3rd Generation Partnership Project (3GPP) system, which serves as an exemplary wireless communication system, and the general signal transmission method using it are illustrated.

[0026] Figure 2 The structure of a radio frame is shown.

[0027] Figure 3 The resource grid for the time slot is shown.

[0028] Figure 4 An exemplary mapping of physical channels in a time slot is shown.

[0029] Figure 5 This illustrates exemplary PDSCH and ACK / NACK transmission processing.

[0030] Figure 6 An exemplary PUSCH transmission process is shown.

[0031] Figure 7 An example of a Channel State Information (CSI) related process is shown.

[0032] Figure 8 This is a diagram used to explain the determination of CSI calculation time and valid CSI reports according to the implementation method.

[0033] Figure 9 Examples of the operation of the UE and the network according to the implementation method are illustrated.

[0034] Figure 10 An example of a non-periodic CSI report according to an implementation method is shown.

[0035] Figure 11 The flow of UE operation according to the implementation method is illustrated.

[0036] Figure 12 The flow of BS operation according to the implementation method is illustrated.

[0037] Figure 13 An example of a communication system applied to this disclosure is shown.

[0038] Figure 14 Wireless devices applicable to this disclosure are illustrated. Detailed Implementation

[0039] The embodiments disclosed herein are applicable to various radio access technologies such as Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA). CDMA can be implemented as radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented as radio technologies such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rate GSM Evolution (EDGE). OFDMA can be implemented as radio technologies such as IEEE 802.11 (Wireless Fidelity (Wi-Fi)), IEEE 802.16 (Global Microwave Access Interoperability (WiMAX)), IEEE 802.20, and Evolved UTRA (E-UTRA). UTRA is part of the Universal Mobile Telecommunications System (UMTS). The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of Evolved UMTS using E-UTRA (E-UMTS), and LTE-Advanced (A) is an evolution of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolution of 3GPP LTE / LTE-A.

[0040] As more and more communication devices require greater communication capacity, there is a need for enhanced mobile broadband communications compared to traditional radio access technologies (RATs). Furthermore, the ability to provide various services anytime, anywhere by connecting multiple devices and objects is another important consideration for next-generation communications. Communication system designs considering reliability and latency-sensitive services / UEs are also being discussed. Therefore, the introduction of new radio access technologies that consider enhanced mobile broadband (eMBB), massive MTC, and ultra-reliable low-latency communication (URLLC) is being discussed. In this disclosure, for simplicity, this technology will be referred to as NR (New Radio or New RAT).

[0041] For the sake of brevity, this disclosure primarily describes 3GPP NR, but the technical concepts herein are not limited thereto.

[0042] In this disclosure, the term "settings" may be replaced with "configuration," and the two are used interchangeably. Furthermore, conditional expressions (e.g., "if," "in the case of," or "when") may be replaced by "based on" or "in the state of." Additionally, the operation or software / hardware (SW / HW) configuration of the user equipment (UE) / base station (BS) can be derived / understood based on the satisfaction of corresponding conditions. When the processing on the receiving (or transmitting) side can be derived / understood from the processing on the transmitting (or receiving) side in signal transmission / reception between wireless communication devices (e.g., BS and UE), its description may be omitted. For example, signal determination / generation / encoding / transmission on the transmitting side can be understood as signal monitoring reception / decoding / determination on the receiving side. Furthermore, when referring to the UE performing (or not performing) a specific operation, this can also be interpreted as the BS expecting / assuming (or not expecting / assuming) the UE to perform that specific operation. Similarly, when referring to the BS performing (or not performing) a specific operation, this can also be interpreted as the UE expecting / assuming (or not expecting / assuming) the BS to perform that specific operation. In the following description, for ease of description, sections, implementation methods, examples, options, methods, and solutions are distinguished and indexed, but this does not mean that each of them necessarily constitutes an independent invention or that each of them should be implemented only individually. Unless explicitly contradictory, it can be deduced / understood that at least some sections, implementation methods, examples, options, methods, and solutions can be combined or omitted.

[0043] In a wireless communication system, a user equipment (UE) receives information from a base station (BS) via a downlink (DL) and transmits information to the BS via an uplink (UL). The information transmitted and received by the BS and UE includes data and various control information, and varies depending on the type / purpose of the information transmitted and received by the UE and BS, involving various physical channels.

[0044] Figure 1 The physical channel used in a 3GPP NR system and the general signal transmission method using it are shown.

[0045] When the UE is powered on again from a power-off state or enters a new cell, in step S101, the UE performs an initial cell search procedure (e.g., establishing synchronization with the BS). For this purpose, the UE receives a synchronization signal block (SSB) from the BS. The SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH). The UE establishes synchronization with the BS based on the PSS / SSS and obtains information such as the cell identifier (ID). The UE can obtain broadcast information in the cell based on the PBCH. The UE can receive a DL reference signal (RS) during the initial cell search procedure to monitor the DL channel status.

[0046] After the initial cell search, in step S102, the UE can obtain more specific system information by receiving the Physical Downlink Control Channel (PDCCH) and receiving the Physical Downlink Shared Channel (PDSCH) based on the information in the PDCCH.

[0047] In steps S103 to S106, the UE may perform a random access procedure to access the BS. For random access, the UE may send a preamble to the BS on the Physical Random Access Channel (PRACH) (S103) and receive a response message for the preamble on the PDCCH and the corresponding PDSCH (S104). In the case of contention-based random access, the UE may further perform a contention resolution procedure by sending a PRACH (S105) and receiving the PDCCH and the corresponding PDSCH (S106).

[0048] Following the aforementioned process, the UE can receive the PDCCH / PDSCH (S107) and transmit the Physical Uplink Shared Channel (PUSCH) / Physical Uplink Control Channel (PUCCH) (S108), as part of the general downlink / uplink signal transmission process. The control information sent from the UE to the BS is called Uplink Control Information (UCI). UCI includes Hybrid Automatic Repeat and Request Acknowledgment / Nack Acknowledgment (HARQ-ACK / NACK), Scheduling Request (SR), Channel State Information (CSI), etc. CSI includes Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), Rank Indicator (RI), etc. Although UCI is usually transmitted on the PUCCH, it can be transmitted on the PUSCH when control information and service data need to be transmitted simultaneously. Additionally, UCI can be transmitted aperiodically via the PUSCH according to network requests / commands.

[0049] Figure 2 The radio frame structure is shown. In NR, uplink and downlink transmissions are configured in frames. Each radio frame is 10ms long and is divided into two 5ms half-frames (HF). Each half-frame is further divided into five 1ms subframes (SF). Subframes are divided into one or more time slots, and the number of time slots in a subframe depends on the subcarrier spacing (SCS). Depending on the cyclic prefix (CP), each time slot includes 12 or 14 orthogonal frequency division multiplexing (OFDM) symbols. When using a normal CP, each time slot includes 14 OFDM symbols. When using an extended CP, each time slot includes 12 OFDM symbols.

[0050] Table 1 illustrates, for example, how the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to SCS when using normal CP.

[0051] [Table 1] N slot symb Number of symbols in a time slot N frame,u slot Number of time slots in a frame N subframe,u slot Number of time slots in a subframe Table 2 shows the number of symbols per slot, the number of slots per frame, and the number of slots per subframe that vary according to SCS when using extended CP.

[0052] [Table 2]

[0053] The frame structure is only an example. The number of subframes, time slots, and symbols in a frame can vary.

[0054] In NR systems, OFDM parameter sets (e.g., SCS) can be configured differently for multiple cells aggregated for a single UE. Therefore, the (absolute time) duration of time resources (e.g., SF, time slots, or TTI) (referred to as time units (TU) for simplicity) consisting of the same number of symbols can be configured differently among the aggregated cells. Here, symbols can include OFDM symbols (or CP-OFDM symbols) and SC-FDMA symbols (or Discrete Fourier Transform-Extended-OFDM (DFT-s-OFDM) symbols).

[0055] Figure 3 The resource grid shows a time slot. A time slot comprises multiple symbols in the time domain. For example, when using a normal CP, a time slot comprises 14 symbols. However, when using an extended CP, a time slot comprises 12 symbols. A carrier comprises multiple subcarriers in the frequency domain. A resource block (RB) is defined as multiple consecutive subcarriers in the frequency domain (e.g., 12 consecutive subcarriers). A bandwidth portion (BWP) can be defined as multiple consecutive physical RBs (PRBs) in the frequency domain and corresponds to a single set of parameters (e.g., SCS, CP length, etc.). A carrier can include up to N (e.g., five) BWPs. Data communication can be performed through enabled BWPs, and only one BWP can be enabled for a UE. In the resource grid, individual elements are called resource elements (REs), and a complex symbol can be mapped to individual REs.

[0056] Figure 4This illustrates an exemplary mapping of physical channels within a time slot. The PDCCH can be transmitted in the DL control area, and the PDSCH can be transmitted in the DL data area. The PUCCH can be transmitted in the UL control area, and the PUSCH can be transmitted in the UL data area. The guard period (GP) provides a time gap for transmit-to-receive mode or receive-to-transmit mode switching at the BS and UE. Some symbols in the subframe during DL-UL handover can be configured as GP.

[0057] The physical channels will be described in more detail below.

[0058] The PDCCH transmits the DCI. For example, the PDCCH (i.e., the DCI) may carry information about the transmission format and resource allocation of the DL-SCH, resource allocation information for the Uplink Shared Channel (UL-SCH), paging information for the PCH, system information for the DL-SCH, resource allocation information for higher-layer control messages (e.g., RARs transmitted on the PDCCH), transmission power control commands, information about enabling / releasing configured schedules, etc. The DCI includes Cyclic Redundancy Check (CRC). The CRC is masked using various identifiers (IDs) (e.g., Radio Network Temporary Identifiers (RNTIs)) depending on the owner or purpose of the PDCCH. For example, if the PDCCH is used for a specific UE, the CRC is masked using the UE ID (e.g., Cell-RNTI (C-RNTI)). If the PDCCH is used for paging messages, the CRC is masked using the Paging-RNTI (P-RNTI). If the PDCCH is used for system information (e.g., System Information Block (SIB)), the CRC is masked by the System Information RNTI (SI-RNTI). When the PDCCH is used for RAR, the CRC is masked by the Random Access-RNTI (RA-RNTI).

[0059] The PDCCH comprises 1, 2, 4, 8, or 16 Control Channel Elements (CCEs) depending on its Aggregation Level (AL). A CCE is a logical allocation unit used to provide a specific code rate to the PDCCH based on the radio channel state. A CCE comprises six Resource Element Groups (REGs), each REG defined by one OFDM symbol × one (P)RB. The PDCCH is transmitted in a Control Resource Set (CORESET). A CORESET is defined as a set of REGs with a given set of parameters (e.g., SCS, CP length, etc.). Multiple CORESETs for a UE can overlap in the time / frequency domain. A CORESET can be configured by system information (e.g., Master Information Block (MIB)) or UE-specific higher-layer signaling (e.g., Radio Resource Control (RRC) signaling). Specifically, the number of RBs and symbols (up to 3) in a CORESET can be configured via higher-layer signaling.

[0060] For PDCCH reception / detection, the UE monitors PDCCH candidates. PDCCH candidates are the Common Enquiry Points (CCEs) that the UE should monitor to detect the PDCCH. Each PDCCH candidate is defined as having 1, 2, 4, 8, or 16 CCEs according to the Algorithm (AL). Monitoring includes (blind) decoding of the PDCCH candidates. The set of PDCCH candidates decoded by the UE is defined as the PDCCH Search Space (SS). The SS can be a Common Search Space (CSS) or a UE-Specific Search Space (USS). The UE can obtain the DCI by monitoring PDCCH candidates in one or more SSs configured by the MIB or higher-layer signaling. Each CORESET is associated with one or more SSs, and each SS is associated with a CORESET. SSs can be defined based on the following parameters.

[0061] - controlResourceSetId: CORESET associated with SS.

[0062] - monitoringSlotPeriodicityAndOffset: PDCCH monitoring periodicity (slot) and PDCCH monitoring offset (slot).

[0063] - monitoringSymbolsWithinSlot: PDCCH monitoring symbols within a slot (e.g., the first symbol of CORESET).

[0064] - nrofCandidates: The number of PDCCH candidates (one of 0, 1, 2, 3, 4, 5, 6 and 8) for each AL={1, 2, 4, 8, 16}.

[0065] The timing when a UE needs to monitor PDCCH candidates (e.g., time / frequency resources) is defined as a PDCCH (monitoring) timing. One or more PDCCH (monitoring) timings can be configured in a time slot.

[0066] Table 3 shows the characteristics of each SS.

[0067] [Table 3]

[0068] Table 4 shows the DCI format transmitted on the PDCCH.

[0069] [Table 4]

[0070] DCI format 0_0 can be used to schedule PUSCH based on TB (or TB level), and DCI format 0_1 ​​can be used to schedule PUSCH based on TB (or TB level) or PUSCH based on code block group (CBG) (or CBG level). DCI format 1_0 can be used to schedule PDSCH based on TB (or TB level), and DCI format 1_1 can be used to schedule PDSCH based on TB (or TB level) or PDSCH based on CBG (or CBG level) (or DL-licensed DCI). DCI formats 0_0 / 0_1 can be referred to as UL-licensed DCI or UL scheduling information, and DCI formats 1_0 / 1_1 can be referred to as DL-licensed DCI or DL ​​scheduling information. DCI format 2_0 is used to transmit dynamic slot format information (e.g., dynamic slot format indicator (SFI)) to the UE, and DCI format 2_1 is used to transmit DL preemption information to the UE. DCI formats 2_0 and / or DCI format 2_1 can be transmitted to the corresponding group of UEs on the group common PDCCH (PDCCH pointing to a group of UEs).

[0071] DCI formats 0_0 and 1_0 can be referred to as fallback DCI formats, while DCI formats 0_1 and 1_1 can be referred to as non-fallback DCI formats. In fallback DCI formats, the DCI size / field configuration remains the same regardless of the UE configuration. Conversely, in non-fallback DCI formats, the DCI size / field configuration varies depending on the UE configuration.

[0072] PDSCH transmits DL data (e.g., DL Shared Channel Transport Block (DL-SCH TB)) using modulation schemes such as Quadrature Phase Shift Keying (QPSK), 16-element Quadrature Amplitude Modulation (16QAM), 64QAM, or 256QAM. TBs are encoded as codewords. PDSCH can transmit up to two codewords. Scrambling and modulation mapping can be performed on a codeword basis, and modulation symbols generated from each codeword can be mapped to one or more layers. Each layer, along with a demodulation reference signal (DMRS), is mapped to a resource, and OFDM symbol signals are generated from the layer mapped with the DMRS and transmitted through the corresponding antenna port.

[0073] PUCCH transmits uplink control information (UCI). UCI includes the following information.

[0074] - SR (Schedule Request): Information used to request UL-SCH resources.

[0075] - HARQ (Hybrid Automatic Repeat Request) - ACK (Acknowledgement): A response to a DL data packet (e.g., a codeword) on the PDSCH. HARQ-ACK indicates whether the DL data packet was successfully received. A 1-bit HARQ-ACK can be sent in response to a single codeword. A 2-bit HARQ-ACK can be sent in response to two codewords. HARQ-ACK responses include positive ACK (simply ACK), negative ACK (NACK), discontinuous transmission (DTX), or NACK / DTX. The term HARQ-ACK is used interchangeably with HARQ ACK / NACK and ACK / NACK.

[0076] - CSI (Channel State Information): Feedback information for the DL channel. MIMO-related feedback information includes RI and PMI.

[0077] Table 5 shows exemplary PUCCH formats. Based on the PUCCH transmission duration, PUCCH formats can be divided into short PUCCH (formats 0 and 2) and long PUCCH (formats 1, 3, and 4).

[0078] [Table 5]

[0079] PUCCH format 0 transmits up to 2 bits of UCI and is mapped in a sequence-based manner for easy transmission. Specifically, the UE sends a specific UCI to the BS by transmitting one of multiple sequences on the PUCCH of PUCCH format 0. The UE only transmits the PUCCH of PUCCH format 0 in the PUCCH resource configured for the corresponding SR when the UE sends an affirmative SR.

[0080] PUCCH format 1 transmits up to 2 bits of UCI, and the modulation symbols of UCI are spread in the time domain with orthogonal overlay code (OCC) (configured differently depending on whether frequency hopping is performed). DMRS is transmitted in symbols that do not transmit modulation symbols (i.e., transmitted in time division multiplexing (TDM)).

[0081] PUCCH format 2 transmits more than 2 bits of UCI, and the modulation symbols of the DCI are transmitted using DMRS in frequency division multiplexing (FDM). The DMRS is located at a density of 1 / 3 in symbols #1, #4, #7, and #10 of a given RB. A pseudo-noise (PN) sequence is used for the DMRS sequence. Frequency hopping can be enabled for 2-symbol PUCCH format 2.

[0082] PUCCH format 3 does not support UE multiplexing within the same PRBS and transmits more than 2 bits of UCI. In other words, PUCCH resources in PUCCH format 3 do not include OCC. Modulation symbols are transmitted in TDM using DMRS.

[0083] PUCCH format 4 supports multiplexing of up to four UEs in the same PRBS and transmits more than 2 bits of UCI. In other words, PUCCH resources in PUCCH format 3 include OCC. Modulation symbols are transmitted in TDM using DMRS.

[0084] At least one of one or two or more cells configured for the UE can be configured for PUCCH transmission. At least the primary cell can be set as the cell for PUCCH transmission. Based on the at least one cell configured for PUCCH transmission, at least one PUCCH cell group can be configured for the UE, and each PUCCH cell group includes one or two or more cells. A PUCCH cell group may be simply referred to as a PUCCH group. PUCCH transmission can be configured not only in the primary cell but also in secondary cells (Scells). The primary cell belongs to the primary PUCCH group, and the PUCCH-SCell configured for PUCCH transmission belongs to the secondary PUCCH group. For cells belonging to the primary PUCCH group, the PUCCH on the primary cell can be used. For cells belonging to the secondary PUCCH group, the PUCCH on the PUCCH-SCell can be used.

[0085] PUSCH transmits UL data (e.g., UL Shared Channel Transport Block (UL-SCH TB)) and / or UCI based on CP-OFDM or DFT-s-OFDM waveforms. When PUSCH is transmitted in DFT-s-OFDM waveform, the UE transmits PUSCH via transform precoding. For example, when transform precoding is not possible (e.g., disabled), the UE may transmit PUSCH using CP-OFDM waveform, while when transform precoding is possible (e.g., enabled), the UE may transmit PUSCH using either CP-OFDM or DFT-s-OFDM waveform. PUSCH transmission can be dynamically scheduled via UL authorization in DCI, or semi-statically scheduled via higher-layer (e.g., RRC) signaling (and / or Layer 1 (L1) signaling such as PDCCH) (configured scheduling or configured authorization). PUSCH transmission can be performed in a codebook-based or non-codebook-based manner.

[0086] Figure 5 This illustrates an exemplary ACK / NACK transmission process. (Refer to...) Figure 5 The UE can detect the PDCCH in time slot #n. The PDCCH includes DL scheduling information (e.g., DCI format 1_0 or DCI format 1_1). The PDCCH indicates the DL assignment offset K0 with the PDSCH and the PDSCH offset K1 with the HARQ-ACK report. For example, DCI format 1_0 and DCI format 1_1 may include the following information.

[0087] - Frequency domain resource assignment: Indicates the set of RBs assigned to the PDSCH.

[0088] - Time-domain resource assignment: Indicates the starting position (e.g., OFDM symbol index) and length (e.g., number of OFDM symbols) of K0 and the PDSCH in the time slot.

[0089] - PDSCH-to-HARQ_feedback timer indicator: Indicates K1.

[0090] - HARQ process ID (4 bits): The HARQ process ID that indicates the data (e.g., PDSCH or TB).

[0091] - PUCCH Resource Indicator (PRI): Indicates the PUCCH resource to be used for UCI transmission among multiple PUCCH resources in the PUCCH resource set.

[0092] After receiving the PDSCH in time slot #(n+K0) according to the scheduling information of time slot #n, the UE can transmit a UCI on the PUCCH in time slot #(n+K1). The UCI may include a HARQ-ACK response to the PDSCH. For convenience, Figure 5The assumption that the SCS of the PDSCH is equal to the SCS of the PUCCH and that slot #n1 = slot #(n+K0) should not be construed as limiting this disclosure. When the SCSs are different, K1 can be indicated / interpreted based on the SCS of the PUCCH.

[0093] When the PDSCH is configured to carry a maximum of one TB, the HARQ-ACK response can be configured in one bit. When the PDSCH is configured to carry a maximum of two TBs, if spatial bundling is not configured, the HARQ-ACK response can be configured in two bits; if spatial bundling is configured, the HARQ-ACK response can be configured in one bit. When time slot #(n+K1) is designated as the timing for HARQ-ACK transmissions of multiple PDSCHs, the UCI transmitted in time slot #(n+K1) includes HARQ-ACK responses for multiple PDSCHs.

[0094] Whether a UE should perform spatial binding in response to a HARQ-ACK response can be configured for each cell group (e.g., via RRC / higher-layer signaling). For example, spatial binding can be configured for individual HARQ-ACK responses sent on the PUCCH and / or on the PUSCH.

[0095] When up to two (or more) TBs (or codewords) can be received at once in the corresponding serving cell (which may be scheduled by a DCI) (e.g., when higher-layer parameters...). maxNrofCodeWordsScheduledByDCI Spatial binding is supported when 2 TB is specified. More than four layers can be used for 2TB of transmission, and up to four layers can be used for 1TB of transmission. As a result, when spatial binding is configured for a corresponding cell group, spatial binding can be performed on serving cells within the cell group that can be scheduled for more than four layers. A UE that wants to send a HARQ-ACK response via spatial binding can generate a HARQ-ACK response by performing a (bit-wise) logical AND operation on the A / N bits of multiple TBs.

[0096] For example, suppose a UE receives a DCI that schedules two TBs and receives the two TBs on the PDSCH based on the DCI. The UE performing spatial bundling can generate a single A / N bit by performing a logical AND operation between the first A / N bit of the first TB and the second A / N bit of the second TB. As a result, when both the first TB and the second TB are ACK, the UE reports the ACK bit value to the BS, and when at least one TB is NACK, the UE reports the NACK bit value to the BS.

[0097] For example, when only one TB is actually scheduled in a serving cell configured to receive two TBs, the UE can generate a single A / N bit by performing a logical AND operation on the A / N bit and bit value 1 of a TB. As a result, the UE reports the A / N bit of one TB to the BS.

[0098] Multiple parallel DL HARQ processes exist at the BS / UE for DL ​​transmission. While the BS awaits HARQ feedback indicating the success or failure of a previous DL transmission, multiple parallel HARQ processes allow for continuous DL transmission. Each HARQ process is associated with a HARQ buffer in the Media Access Control (MAC) layer. Each DL HARQ process manages status variables such as the number of MAC Physical Data Unit (PDU) transmissions, HARQ feedback to MAC PDUs in the buffer, and the current redundant version. Each HARQ process is identified by a HARQ process ID.

[0099] Figure 6 An exemplary PUSCH transmission process is shown. (Refer to...) Figure 6 The UE can detect the PDCCH in time slot #n. The PDCCH includes DL scheduling information (e.g., DCI format 1_0 or 1_1). DCI format 1_0 or 1_1 may include the following information.

[0100] - Frequency domain resource assignment: Indicates the set of RBs assigned to PUSCH.

[0101] - Time-domain resource assignment: Indicates the slot offset K2 and the start position (e.g., OFDM symbol index) and duration (e.g., number of OFDM symbols) of the PUSCH within the slot. The start symbol and length of the PUSCH can be indicated by the start and length indicator value (SLIV) or separately.

[0102] Then, the UE can send the PUSCH in time slot #(n+K2) according to the scheduling information in time slot #n. The PUSCH includes the UL-SCH TB.

[0103] Figure 7 An example of a CSI-related process is shown.

[0104] The UE receives CSI-related configuration information from the BS via RRC signaling (710). The CSI-related configuration information may include at least one of the following: Channel State Information-Interference Measurement (CSI-IM) related information, CSI measurement related information, CSI resource configuration related information, CSI-RS resource related information, or CSI report setting related information.

[0105] - CSI-IM resources can be configured for UE interference measurement (IM). In the time domain, the CSI-IM resource set can be configured as periodic, semi-persistent, or aperiodic. CSI-IM resources can be configured as UE zero-power (ZP)-CSI-RS. ZP-CSI-RS can be configured to be distinguished from non-zero-power (NZP)-CSI-RS.

[0106] - The UE may assume that the CSI-RS resources configured for channel measurements and the CSI-IM / NZP CSI-RS resources configured for interference measurements for a CSI report have a QCL relationship with respect to the "QCL-TypeD" of the respective resources (when the NZP CSI-RS resources are used for interference measurements).

[0107] - CSI resource configuration may include at least one of CSI-IM resources for interference measurement, NZP CSI-RS resources for interference measurement, and NZP CSI-RS resources for channel measurement. The channel measurement resource (CMR) may be an NZP CSI-RS for CSI acquisition, and the interference measurement resource (IMR) may be an NZP CSI-RS for both CSI-IM and IM.

[0108] - CSI-RS can be configured for one or more UEs. Different CSI-RS configurations can be provided for each UE, or the same CSI-RS configuration can be provided to multiple UEs. CSI-RS can support up to 32 antenna ports. CSI-RS corresponding to N (N is 1 or greater) antenna ports can be mapped to N RE locations within a time-frequency cell corresponding to one time slot and one RB. When N is 2 or greater, N-port CSI-RS can be multiplexed using CDM, FDM, and / or TDM methods. CSI-RS can be mapped to the remaining REs except for those mapped to CORESET, DMRS, and SSB. In the frequency domain, CSI-RS can be configured for the entire bandwidth, a portion of the bandwidth (BWP), or a portion of the bandwidth. CSI-RS can be transmitted in each RB within the bandwidth where CSI-RS is configured (i.e., density = 1), or CSI-RS can be transmitted in every two RBs (e.g., even or odd RBs) (i.e., density = 1 / 2). When CSI-RS is used as a Tracking Reference Signal (TRS), a single-port CSI-RS can be mapped onto three subcarriers in each resource block (i.e., density = 3). One or more CSI-RS resource sets can be configured for the UE in the time domain. Each CSI-RS resource set may include one or more CSI-RS configurations. Each CSI-RS resource set can be configured as periodic, semi-persistent, or aperiodic.

[0109] - CSI reporting settings may include configurations for feedback types, measurement resources, report types, etc. NZP-CSI-RS resource sets can be used for the corresponding UE's CSI reporting settings. NZP-CSI-RS resource sets can be associated with CSI-RS or SSB. Multiple periodic NZP-CSI-RS resource sets can be configured as TRS resource sets. (i) Feedback types include Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), CSI-RS Resource Indicator (CRI), SSB Resource Block Indicator (SSBRI), Layer Indicator (LI), Rank Indicator (RI), Layer 1 (L1) - Reference Received Signal Strength (RSRP), etc. (ii) Measurement resources may include configurations for the UE to perform measurements on downlink signals and / or downlink resources to determine feedback information. Measurement resources can be configured as ZP and / or NZP CSI-RS resource sets associated with CSI reporting settings. NZP CSI-RS resource sets may include CSI-RS sets or SSB sets. For example, L1-RSRP can be measured for a CSI-RS set or an SSB set. (iii) Report types may include the timing of the UE reporting and the configuration of the uplink channel. Reporting time can be configured to be periodic, semi-persistent, or aperiodic. Periodic CSI reports can be sent on the PUCCH. Semi-persistent CSI reports can be sent on the PUCCH or PUSCH based on a Media Access Control (MAC) control element (CE) indicating whether it is enabled or disabled. Aperiodic CSI reports can be indicated by DCI signaling. For example, the uplink-granted CSI request field can indicate one of various report trigger sizes. Aperiodic CSI reports can be sent on the PUSCH.

[0110] The UE measures CSI based on configuration information related to CSI. CSI measurement may include receiving CSI-RS (720) and obtaining CSI by calculating the received CSI-RS (730).

[0111] The UE may send a CSI report to the BS (740). For the CSI report, the time and frequency resources available to the UE are controlled by the BS. Channel State Information (CSI) includes at least one of the following: 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), L1-RSRP, and / or L-SINR.

[0112] CSI reporting supports periodic, semi-permanent, and aperiodic temporal behavior. i) Periodic CSI reporting is performed in short and long PUCCHs. The periodicity and slot offset of periodic CSI reports can be configured by RRC, and refer to CSI-ReportConfig IE. ii) SP (semi-periodic) CSI reporting is performed in short, long, or PUSCHs. For SP CSI in short / long PUCCHs, the periodicity and slot offset are configured by RRC, and CSI reporting is enabled / disabled via a separate MAC CE / DCI. For SP CSI in PUSCHs, the periodicity of SP CSI reporting is configured by RRC, but the slot offset is not configured by RRC, and SP CSI reporting is enabled / disabled by DCI (format 0_1). For SP CSI reporting in PUSCHs, a separate RNTI (SP-CSI C-RNTI) is used. The initial CSI report timing follows the PUSCH temporal allocation value indicated by the DCI, and subsequent CSI report timing follows the periodicity configured by RRC. DCI format 0_1 ​​may include a CSI request field and enable / disable a specific configuration of SP-CSI triggering status. SP CSI reports have the same or similar enable / disable mechanism as data transmission in the SPS PUSCH. iii) Non-periodic CSI reporting is performed in the PUSCH and triggered by the DCI. In this case, information related to the triggering of non-periodic CSI reports can be transmitted / indicated / configured via MAC-CE. For AP CSI with AP CSI-RS, the AP CSI-RS timing is configured by RRC, and the timing of AP CSI reports is dynamically controlled by the DCI.

[0113] CSI Enhancement for Network Energy Saving

[0114] To determine the impact of Network Energy Saving (NES) on the channel quality of the UE when it is introduced, enhancements to the CSI framework have been discussed at the NR Rel.18 standardization meeting. Therefore, this specification discloses various implementations of CSI measurement and CSI processing unit (CPU) usage for CSI reporting configured for NES.

[0115] Table 6 shows an excerpt of items to be applied to the 3GPP TS 38.214 document, which is based on the agreement reached in the recent NR standardization discussion (R1-2308743).

[0116] [Table 6]

[0117] As shown in Table 6 above, one or more sub-configurations can be configured within a CSI reporting setting, and one or a combination of the following configurations can be configured within each sub-configuration.

[0118] - A list of IDs for one or more CSI-RS resources

[0119] - An indication of the subset of antenna ports configured using a bitmap (i.e., an indication of the subset of antenna ports to be activated).

[0120] - Additional power offset increment of the EPRE offset between the PDSCH and CSI-RS configured in the CSI-RS resource configuration.

[0121] - CSI Codebook

[0122] For example, when a list of sub-configurations is provided via CSI report configuration, at least one of the following parameters can be configured for each sub-configuration: (i) CSI codebook, (ii) bitmap for enabling a subset of CSI-RS antenna ports, (iii) subset of CSI-RS resources, and / or (v) power offset increment.

[0123] For example, according to sub-configuration configuration method #1, the first sub-configuration in the CSI report configuration may include the parameter set {first CSI codebook, first CSI-RS antenna port subset, first power offset increment}, and the second sub-configuration may include the parameter set {second CSI codebook, second CSI-RS antenna port subset, second power offset increment}. In this case, each sub-configuration can be associated with all CSI-RS resources of the corresponding CSI report configuration.

[0124] For example, according to sub-configuration configuration method #2, the first sub-configuration in the CSI report configuration may include a parameter set {first CSI-RS resource subset, first power offset increment}, and the second sub-configuration may include a parameter set {second CSI-RS resource subset, second power offset increment}. The first and second CSI-RS resource subsets can each be selected from the CSI-RS resources included in the CSI report configuration.

[0125] For convenience, a CSI reporting configuration that includes a list of sub-configurations with IDs of one or more CSI-RS resources is called a Type 2 Spatial Domain (SD) adaptation; a CSI reporting configuration that includes a sub-configuration with an antenna port subset indication using a bitmap configuration is called a Type 1 SD adaptation; and a CSI reporting configuration that includes a sub-configuration with an additional power offset increment value is called a Power Domain (PD) adaptation. A list of IDs of one or more CSI-RS resources and / or power offset increment values ​​can be configured for sub-configurations belonging to a CSI reporting configuration (called a Type 2 SD+PD adaptation), and a bitmap-based antenna port subset indication and / or power offset increment value can be configured for sub-configurations belonging to a CSI reporting configuration (called a Type 1 SD+PD adaptation). In the case of Type 1 SD or PD or Type 1 SD+PD adaptation, each CSI-RS resource can be associated with all sub-configurations configured in a CSI reporting configuration, and in the case of Type 2 SD, each CSI-RS resource can be associated with only a single sub-configuration among multiple sub-configurations in a CSI reporting configuration. For Type 2 SD+PD adaptation, the list of CSI-RS resources #1 configured in a sub-configuration within the same CSI report configuration and the list of CSI-RS resources #2 configured in another sub-configuration can be the same or disjoint.

[0126] When a CSI reporting configuration has L sub-configurations, the UE can report CSI information corresponding to each of the L sub-configurations to the BS via a single PUSCH / PUCCH. Of the L sub-configurations, only N (N less than or equal to L and greater than or equal to 1) can be activated or triggered via MAC-CE or DCI. In this case, the UE can report CSI information corresponding to each of the N sub-configurations to the BS via a single PUSCH / PUCCH. Specifically, for a CSI reporting configuration with semi-persistent CSI reporting on the PUCCH, N sub-configurations out of the L sub-configurations configured via MAC-CE can be activated. Furthermore, for a CSI reporting configuration with semi-persistent CSI reporting or non-periodic CSI reporting on the PUSCH, N sub-configurations out of the L sub-configurations configured via DCI can be triggered.

[0127] To enable the UE to calculate / report CSI information corresponding to one or more sub-configurations for a CSI report, a CSI measurement method and a CSI-RS resource / port counting method that take into account the implementation complexity of the UE can be proposed.

[0128] [Proposal #1] When a single CSI-RS resource is associated with multiple sub-configurations, the CSI-RS resource and / or port... Count the quantity

[0129] The counting method in the existing NR specification is defined as follows: "If a CSI-RS resource is referenced N times by one or more CSI report settings, then the CSI-RS port and CSI-RS resource within the CSI-RS resource are counted N times." In other words, when multiple CSI reporting settings are associated with a single CSI-RS resource, the number of CSI-RS resources and ports is counted as the number of CSI reporting settings. The purpose of this counting is to ensure that the UE implementation cannot store more than a certain number of resources / ports in memory when storing CSI-RS. Therefore, the BS can report the number of resources / ports based on the UE's capabilities and configure CSI reporting settings according to the aforementioned counting rules, ensuring that the number of resources / ports does not exceed the UE's capabilities.

[0130] Because the CSI framework has been enhanced for NES, multiple sub-configurations can be configured within a single CSI reporting setting, and the same CSI-RS resource can be associated with each sub-configuration. Therefore, it is necessary to define a CSI-RS resource / port counting method for these scenarios.

[0131] First, a CSI-RS resource counting method is proposed. When a CSI-RS resource is configured for X CSI reporting settings, and the number of sub-configurations associated with the corresponding CSI-RS resource within each CSI reporting setting is defined as N(k), the CSI-RS resource count can be defined as N(1) + N(2) + ... + N(X). Here, N(1) represents the number of sub-configurations associated with the corresponding CSI-RS resource in the first CSI-RS reporting setting (where the CSI-RS resource is configured), and N(X) represents the number of sub-configurations associated with the corresponding CSI-RS resource in the Xth CSI-RS reporting setting (where the corresponding CSI-RS resource is configured). When there is no sub-configuration configured for the kth CSI-RS reporting setting, the corresponding value of N(k) is 1. Specifically, depending on the UE capability, CSI report type (e.g., P / SP / AP CSI report), or CSI-RS resource type (e.g., P / SP / AP CSI-RS resource), N(k) (i.e., the number of sub-configurations associated with the CSI-RS resource) can be determined by applying one or a combination of the following alternatives.

[0132] - Alternative Option 1: N(k) is always considered to be 1 even when multiple sub-configurations are configured or activated for the k-th CSI report setting (i.e., CSI-ReportConfig).

[0133] - Alternative Option 2: When multiple (i.e., L) sub-configurations are set for the k-th CSI report (regardless of how many of L are actually activated / triggered), N(k) is always considered to be L.

[0134] - Alternative Option 3: Even when multiple (i.e., L) sub-configurations are configured for the k-th CSI report setting, N(k) is considered to be N when N of L are actually activated / triggered via MAC-CE or DCI.

[0135] - Alternative Option 4: For Alternative Options 2, 3, 5, or 6 above, when there are sub-configurations that differ only in power offset (between CSI-RS and PDSCH) for the same CSI-RS resource, these sub-configurations are counted as 1. For example, for the configured CSI reporting settings, when Alternative Option 2 is applied, N(k) = 4, but in reality, sub-configurations #1 and #2 differ only in power offset, and sub-configurations #3 and #4 also differ only in power offset, so in this case, N(k) can be counted as 2. As another example, when only sub-configurations #1 / #2 are activated and Alternative Option 3 is applied, N(k) = 2, but in reality, sub-configurations #1 and #2 differ only in power offset, so in this case, N(k) can be counted as 1.

[0136] - Alternative Option 5: Multiple (i.e., L) sub-configurations are configured for the k-th CSI report setting (especially for SP-CSI or AP-CSI reports on the PUSCH), and only some (M) of L can be activated via the DCI. For example, the CSI report setting associated with each code point in the CSI request field in the DCI and (when multiple sub-configurations are configured for the corresponding CSI report setting) sub-configurations can be pre-configured / indicated, and the UE can feed back the CSI information corresponding to the CSI report setting and sub-configurations associated with the indicated code point to the BS via the UL channel (e.g., PUSCH). In this case, the maximum number of sub-configurations among all code points of the CSI request field associated with the k-th CSI report setting can be counted as N(k) values. For example, when the code points of the CSI request field associated with the k-th CSI report setting, which has a total of 4 sub-configurations, are “001”, “110”, and “111” (“001” is associated with 2 sub-configurations in the k-th CSI report setting, “110” is associated with 1 sub-configuration in the k-th CSI report setting, and “111” is associated with 3 sub-configurations in the k-th CSI report setting), the corresponding N(k) value can be determined to be 3. That is, even with 4 sub-configurations configured, the maximum number of sub-configurations to be triggered by DCI is 3, so only the number of CSI-RS resources corresponding to this can be counted. In the corresponding example, it is assumed that all four sub-configurations are associated with CSI-RS resources, especially in Type 1 SD and / or PD and / or Type 1+PD adaptations. The same approach can be widely applied to Type 2 SD or Type 2 SD+PD adaptations. For example, when CSI-RS resource ID #1 is associated only with sub-configuration #0 / sub-configuration #1 out of four sub-configurations, and the code points of the CSI request field associated with the k-th CSI report setting which has a total of four sub-configurations are “001”, “110”, and “111” (“001” is associated with two sub-configurations within the k-th CSI report setting (e.g., sub-configuration #0 / sub-configuration #2), “110” is associated with one sub-configuration within the k-th CSI report setting (e.g., sub-configuration #2), and “111” is associated with three sub-configurations within the k-th CSI report setting (e.g., sub-configuration #0 / sub-configuration #1 / sub-configuration #2)), the corresponding N(k) value can be determined to be 2. In other words, even when four sub-configurations are configured, the maximum number of sub-configurations that can be triggered by DCI and associated with the corresponding CSI-RS resource ID#1 is 2 (i.e., when the code point of the CSI request field is "111", it is associated with sub-configuration #0 / sub-configuration #1). Therefore, only the number of CSI-RS resources corresponding to this can be counted.The corresponding method can be applied only to P-CSI-RS resources and / or SP-CSI-RS resources (associated with SP-CSI reports and / or AP-CSI reports on PUSCH).

[0137] - Alternative Option 6: Multiple (i.e., L) sub-configurations can be configured for the k-th CSI report. Only N of the L sub-configurations can be triggered via DCI (specifically for SP-CSI or AP-CSI reports on PUSCH), and only N of the L sub-configurations can be activated via MAC-CE (specifically for SP-CSI reports on PUCCH). When a specific UE reports that it only supports the signaling capability of up to M sub-configurations being activated / triggered, it is assumed that the maximum number of CSI-RS resources for M can be considered as N(k). For example, in the case of Type 1 SD and / or PD and / or Type 1+PD adaptation, for the k-th CSI report setting with a total of 4 sub-configurations, the value of min(M), "the number of sub-configurations associated with the corresponding CSI-RS resource (i.e., 4)" can be determined as N(k). When M=2, even when 4 sub-configurations are configured, the maximum number of sub-configurations to be activated and / or triggered via MAC-CE and / or DCI is M=2, so only the number of CSI-RS resources corresponding to this can be counted. The same method can be widely applied to Type 2 SD or Type 2 SD+PD adaptation. For example, when CSI-RS resource ID #1 is associated only with sub-configuration #0 / sub-configuration #1 out of a total of 4 sub-configurations, for the corresponding CSI report setting, min(M), the value of "the number of sub-configurations associated with the corresponding CSI-RS resource (i.e., 2)" can be determined as N(k). The corresponding method can be applied only to P-CSI-RS resources and / or SP-CSI-RS resources (associated with SP-CSI reports and / or AP-CSI reports on PUSCH / PUCCH).

[0138] - Alternative Option 7: When a specific CSI-RS resource is invoked through M sub-configurations out of X sub-configurations belonging to a CSI report, as shown in Table B below, the corresponding CSI-RS resource can be counted M times. In this case, X can represent the number of sub-configurations configured for the corresponding CSI report for P / SP-CSI-RS, and can also represent the number of DCI-activated sub-configurations among the sub-configurations configured for the corresponding CSI report for AP-CSI-RS.

[0139] According to the implementation method, one of the above alternatives can be determined based on the UE capabilities.

[0140] Then, a method for counting the number of ports of a CSI-RS resource is proposed. When a CSI-RS resource is configured for X CSI reporting settings, and the number of sub-configurations associated with the corresponding CSI-RS resource in each CSI reporting setting × the number of ports configured in the corresponding CSI-RS resource configuration is defined as N(k), the number of ports counted by the CSI-RS resource can be defined as N(1) + N(2) + ... + N(X). Here, N(1) represents the product of the number of sub-configurations associated with the corresponding CSI-RS resource in the first CSI-RS reporting setting (where the CSI-RS resource is configured) and the number of ports configured in the CSI-RS resource configuration, and N(X) represents the product of the number of sub-configurations associated with the CSI-RS resource in the Xth CSI-RS reporting setting (where the CSI-RS resource is configured) and the number of ports configured in the CSI-RS resource configuration. When no sub-configuration is configured for the k-th CSI-RS report setting, the corresponding N(k) value represents "the number of ports configured in the corresponding CSI-RS resource configuration". Specifically, depending on the UE capability, CSI report type (e.g., P / SP / AP CSI report), or CSI-RS resource type (e.g., P / SP / AP CSI-RS resource), N(k) (i.e., the number of sub-configurations associated with the CSI-RS resource) can be determined by applying one or a combination of the following alternatives.

[0141] - Alternative Option A: Even when multiple sub-configurations are configured or activated for the k-th CSI report setting (i.e., CSI-ReportConfig), N(k) is always considered to be "the number of ports configured in the corresponding CSI-RS resource configuration".

[0142] - Alternative Option B: When multiple (i.e., L) sub-configurations are configured for the k-th CSI report (regardless of how many of L are actually activated / triggered), N(k) is always considered to be the product of L and "the number of ports configured in the corresponding CSI-RS resource configuration".

[0143] - Alternative Option C: Even when multiple (i.e., L) sub-configurations are configured for the k-th CSI report setting, N(k) is considered to be the product of N and the number of ports configured in the corresponding CSI-RS resource configuration when N of L are actually activated / triggered via MAC-CE or DCI.

[0144] - Alternative Option D: For Alternative Option B or Alternative Option C above, when there are sub-configurations that differ only in the power offset (between CSI-RS and PDSCH) for the same CSI-RS resource, the corresponding sub-configuration can be considered as one sub-configuration. For example, for the configured CSI reporting settings, when Alternative Option B is applied, N(k) = 4 16, but in reality, sub-configurations #1 and #2 differ only in power offset, and sub-configurations #3 and #4 also differ only in power offset, so in this case, N(k) = 2. 16. As another example, when only sub-configuration #1 / sub-configuration #2 is activated and alternative scheme C is applied, N(k) = 2. 16, but in reality, sub-configuration #1 and sub-configuration #2 differ only in power offset, so in this case, N(k) = 16 can be counted.

[0145] - Alternative Option E: When applying Alternative Option B, C, D, or F above, if the port subset indication information (i.e., bitmap information for port open / close) is configured for a specific sub-configuration, such as in Type 1 SD or Type 1 SD+PD adaptation, the number of ports configured in the corresponding CSI-RS resource configuration can be replaced with the number of open ports in the corresponding bitmap information. For example, for the configured CSI reporting settings, when applying Alternative Option B, N(k) = 4 16. However, for sub-configurations #3 and #4, the bitmap information is configured to signal that only 8 ports are open, so in this case, N(k) = 2 can be counted. 16+2 8. As another example, when only sub-configuration #1 / sub-configuration #3 is activated and alternative scheme C is applied, N(k) = 2. 16, but in reality, sub-configuration #3 has bitmap information configured to signal that only 8 ports are open, so in this case, N(k) = 16 + 8 can be counted.

[0146] - Alternative Option F: Multiple (i.e., L) sub-configurations are configured for the k-th CSI report setting (specifically for SP-CSI or AP-CSI reporting on the PUSCH), and only some (M) of L can be activated via the DCI. For example, the CSI report setting associated with each code point in the CSI request field of the DCI and (when multiple sub-configurations are configured for the corresponding CSI report setting) sub-configurations can be pre-configured / indicated, and the UE can feed back the CSI information corresponding to the indicated code point associated with the CSI report setting and sub-configuration to the BS via the UL channel (e.g., PUSCH). In this case, N(k) can be considered as the product of the number of ports configured in the corresponding CSI-RS resource configuration and the maximum number of sub-configurations among all code points in the CSI request field associated with the k-th CSI report setting, or N(k) can be considered as the maximum value of the sum of the number of ports configured to be on in the sub-configurations associated with each code point (or the sum of the number of antenna ports signaled as "1" in the bitmap) (and the number of ports configured in the corresponding CSI-RS resource configuration). For example, when the code points of the CSI request field associated with the k-th CSI reporting setting, which has 16 CSI-RS resources and a total of 4 sub-configurations (which signals via antenna port subset indication or bitmap that sub-configuration #0 has all 16 open antenna ports, sub-configuration #1 has only 8 open antenna ports, sub-configuration #2 has only 4 open antenna ports, and sub-configuration #3 has only 2 open antenna ports), are “001”, “110”, and “111” (“001” is associated with 2 sub-configurations within the k-th CSI reporting setting (e.g., sub-configuration #1 / sub-configuration #3), “110” is associated with 1 sub-configuration within the k-th CSI reporting setting (e.g., sub-configuration #0), and “111” is associated with 3 sub-configurations within the k-th CSI reporting setting (e.g., sub-configuration #1 / sub-configuration #2 / sub-configuration #3)), the corresponding N(k) value can be determined to be 3. 16. That is, even with four sub-configurations configured, the maximum number of sub-configurations to be triggered via DCI is 3, so only the number of corresponding CSI-RS resource ports needs to be counted. As another example, when N(k) is considered to be the maximum value of "the sum of the number of ports configured to be on in the associated sub-configurations for each code point (or the sum of the number of antenna ports signaled as "1" in the bitmap) (and the number of ports configured in the corresponding CSI-RS resource configuration)" across all code points in the associated CSI request field, the corresponding N(k) value can be determined as max{8+2, 16, 8+4+2}=16. When the value determined by the corresponding expression for max is less than the number of ports configured in the CSI-RS resource configuration, the final N(k) value can be determined as the number of ports configured in the CSI-RS resource configuration. In the corresponding example, it is assumed that all four sub-configurations are associated with CSI-RS resources, specifically in Type 1 SD and / or PD and / or Type 1+PD adaptations. The same method can be widely applied to Type 2 SD or Type 2 SD+PD adaptations. For example, when the 16-port CSI-RS resource ID #1 is associated only with sub-configuration #0 / sub-configuration #1 out of four sub-configurations, and the code points of the CSI request field associated with the k-th CSI report setting that has a total of four sub-configurations configured are "001", "110", and "111" ("001" is associated with two sub-configurations within the k-th CSI report setting (e.g., sub-configuration #0 / sub-configuration #2), "110" is associated with one sub-configuration within the k-th CSI report setting (e.g., sub-configuration #2), and "111" is associated with three sub-configurations within the k-th CSI report setting (e.g., sub-configuration #0 / sub-configuration #1 / sub-configuration #2)), the corresponding N(k) value can be determined to be 16. 2 = 32. That is, even when four sub-configurations are configured, the maximum number of sub-configurations triggered via DCI and associated with the corresponding CSI-RS resource ID #1 is 2 (i.e., when the code point of the CSI request field is "111", it is associated with sub-configuration #0 / sub-configuration #1). Therefore, only the product of the number of corresponding CSI-RS resources and the number of antenna ports needs to be counted. This method can be applied only to P-CSI-RS resources and / or SP-CSI-RS resources (associated with SP-CSI reports and / or AP-CSI reports on the PUSCH).

[0147] - Alternative Option G: Multiple (i.e., L) sub-configurations can be configured for the k-th CSI report setting. Only N of the L sub-configurations can be triggered via DCI (specifically for SP-CSI reports or AP-CSI reports on PUSCH), and only N of the L sub-configurations can be activated via MAC-CE (specifically for SP-CSI reports on PUCCH). When a specific UE reports that the UE only supports the capability signaling of up to M sub-configurations being activated / triggered, it is assumed that the maximum number of M CSI-RS resources can be considered as N(k). For example, for Type 1 SD and / or PD and / or Type 1 SD+PD adaptations, it can be assumed that the k-th CSI report setting is configured with 16-port CSI-RS resources and a total of 4 sub-configurations (which signals via antenna port subset indication or bitmap that sub-configuration #0 has all 16 open antenna ports, sub-configuration #1 has only 8 open antenna ports, sub-configuration #2 has only 4 open antenna ports, and sub-configuration #3 has only 2 open antenna ports). For the k-th CSI report setting with a total of 4 sub-configurations, the maximum value among the sums of the number of antenna ports associated with the min(M, "the number of sub-configurations associated with the corresponding CSI-RS resource (i.e., 4)") sub-configurations can be determined as N(k). When M=2, even when 4 sub-configurations are configured, the maximum number of sub-configurations to be activated and / or triggered via MAC-CE and / or DCI is also M=2, so only the maximum number of CSI-RS ports that can be correspondingly counted can be counted, i.e., 16+8=24. When the corresponding result value is less than the number of antenna ports configured in the CSI-RS resource, N(k) can ultimately be determined as the number of antenna ports configured in the CSI-RS resource. The same method can be widely applied to corresponding Type 2 SD or Type 2 SD+PD adapters. For example, when CSI-RS resource ID #1 is associated only with sub-configuration #0 / sub-configuration #1 out of a total of 4 sub-configurations, for the corresponding CSI report setting, the product of min(M), the number of sub-configurations associated with the corresponding CSI-RS resource (i.e., 2), and the antenna ports configured for the corresponding CSI-RS resource can be determined as N(k). When the corresponding result value is less than the number of antenna ports configured in the CSI-RS resource, N(k) can ultimately be determined as the number of antenna ports configured in the CSI-RS resource. The corresponding method can be applied only to P-CSI-RS resources and / or SP-CSI-RS resources (associated with SP-CSI reports and / or AP-CSI reports on PUSCH / PUCCH).

[0148] - Alternative Option H: When a specific CSI-RS resource is invoked through M sub-configurations out of X sub-configurations belonging to a CSI report, as shown in Table B below, the corresponding CSI-RS ports can be counted differently based on Type 1 SD, Type 2 SD, or PD adaptations. In the case of a Type 1 SD adaptation (or when at least one sub-configuration is a Type 1 SD or Type 1 SD+PD adaptation, or when at least one sub-configuration has a configured bitmap-based port subset indication), the CSI-RS ports can be counted according to the expression max(∑ s=1 M P s The number of CSI-RS ports is equal to the number of values ​​determined by the expression M×P, where P represents the number of antenna ports configured for CSI-RS resources, Ps represents the number of "1"s (or the number of antenna ports configured to be enabled) in the bitmap indicating the port subset configured for sub-configuration index s, and Ps = P when the bitmap is not configured for sub-configuration index s. In the case of Type 2 SD adaptation, PD adaptation, or Type 2 SD+PD adaptation (or when no bitmap-based port subset indication is configured for any sub-configuration, or when the CSI-RS resource ID list is configured for at least one sub-configuration), the number of CSI-RS ports can be counted as the number determined by the expression M×P, where P can represent the number of antenna ports configured for CSI-RS resources. In this case, X can represent the number of sub-configurations configured for the corresponding CSI report for P / SP-CSI-RS, and can represent the number of sub-configurations activated by DCI among the sub-configurations configured for the corresponding CSI report for AP-CSI-RS.

[0149] The textual proposals for Alternative Scheme 6 and Alternative Scheme G are shown in Table 7 below. For Type 1 SD and / or PD and / or Type 1 SD+PD adaptations, the configuration constraints are assumed to enable more antenna ports as the sub-configuration index value is smaller.

[0150] [Table 7]

[0151] Alternatively, the textual proposals for alternative schemes 6 and G above may be as shown in Table 8 below.

[0152] [Table 8]

[0153] Table 9 shows an excerpt of items to be applied to the 3GPP TS 38.214 document according to the agreement reached in the recent NR standardization discussion (R1-2308743).

[0154] [Table 9]

[0155] The UE can report the number of CSI-RS resources to be configured simultaneously for the CC / BWP or the entire CC / BWP as Y. When it is determined that a CSI-RS resource corresponding to a CSI-RS resource is counted K times (for CSI reporting settings with one or more sub-configurations), by utilizing one or a combination of the above alternative schemes, if K is greater than Y, the UE can expect the corresponding CSI-RS resource to be counted only Y times, and only some sub-configurations in the sub-configuration that include the corresponding CSI-RS resource are triggered / activated via DCI / MAC-CE, etc., so that the CSI-RS resource is counted at most Y times at a specific point in time. This proposal can be applied to CSI-RS resources associated with SP-CSI and / or AP-CSI reports.

[0156] Alternatively, the UE can report the number of antenna ports for CSI-RS resources to be configured simultaneously for the CC / BWP or the entire CC / BWP as Y. When it is determined that the antenna ports corresponding to a CSI-RS resource are counted K times (for CSI reporting settings with one or more sub-configurations), by utilizing one or a combination of the above alternative schemes, if K is greater than Y, the UE can expect the antenna ports corresponding to the CSI-RS resource to be counted only Y times, and only some sub-configurations in the sub-configuration that include the corresponding CSI-RS resource are triggered / activated via DCI / MAC-CE, etc., so that the number of antenna ports of the CSI-RS resource is counted at most Y times at a specific point in time. This proposal can be applied to CSI-RS resources associated with SP-CSI and / or AP-CSI reports.

[0157] According to the implementation method, one of the above alternatives can be determined based on the UE capabilities.

[0158] [Proposal #2] Check the CPU usage and CSI processing time for configurations with one or more sub-configurations that report CSI. method

[0159] Table 10 shows an excerpt from Table 9 (R1-2308743).

[0160] [Table 10]

[0161] Condition #1 in Table 10 above indicates that all CPUs are occupied when a large number of conditions are met (such as {maximum SCS is 120 kHz SCS, non-periodic CSI on CSI PUSCH triggered by UL license, L=0 occupied CPUs, the number of CSI-RS resources configured in the CSI report is 1, the number of antenna ports configured in the corresponding CSI-RS resource is at most 4, type 1 codebook or non-PMI configuration}). When more than one sub-configuration is configured for a single CSI report setting for NES purposes, it may be unclear whether the corresponding condition: {the number of CSI-RS resources configured for the CSI report is 1, and the number of antenna ports configured for the corresponding CSI-RS resource is at most 4} is met.

[0162] First, when determining whether the requirement that "the number of CSI-RS resources configured in the CSI report is 1" is met, the following can be considered.

[0163] - For periodic CSI (P-CSI) reports, the condition "the number of CSI-RS resources configured for CSI reporting is one" is considered satisfied only if the sum of the number of CSI-RS resources associated with each of the L sub-configurations configured for the corresponding CSI report setting and the sum of the N sub-configurations activated / triggered via MAC-CE / DCI for semi-persistent CSI (SP-CSI) or aperiodic CSI (AP-CSI) reports is one. Specifically, for Type 1 SD or PD or Type 1 SD+PD adapters, only a single CSI-RS resource can be configured within the corresponding CSI report setting for CMR purposes, and only a single sub-configuration can be configured (for P-CSI reports) or only a single sub-configuration can be activated / triggered (for SP-CSI reports and / or AP-CSI reports). Alternatively, for Type 2 SD or Type 2 SD+PD adaptations, a single sub-configuration (for P-CSI reporting) can be configured, or a single sub-configuration (for SP-CSI reporting and / or AP-CSI reporting) can be activated / triggered, and the number of CSI-RS resources associated with that sub-configuration can be limited to one.

[0164] Similarly, when determining whether the requirement that "the maximum number of antenna ports configured for the corresponding CSI-RS resource is 4" is met, the following can be considered.

[0165] - For P-CSI reporting, the condition "the number of antenna ports configured for the corresponding CSI-RS resource is at most 4" is considered satisfied only if the number of antenna ports associated with each of the L sub-configurations configured for the corresponding CSI reporting settings, and the number of N sub-configurations activated / triggered via MAC-CE / DCI for SP-CSI or AP-CSI reporting, is at most 4. Specifically, for Type 1 SD or Type 1 SD+PD adapters, the number of antenna ports (if not configured, the antenna ports configured in the associated CSI-RS resource) based on the port subset indication information configured for the configured sub-configuration (for P-CSI reporting) or the activated / triggered sub-configuration (for SP-CSI reporting and / or AP-CSI reporting) can be limited to 4 or fewer. Alternatively, for Type 2 SD or PD or Type 2 SD+PD adapters, the number of antenna ports provided by the CSI-RS resource configured in the corresponding CSI reporting settings can be limited to 4 or fewer.

[0166] Alternatively, when one or more sub-configurations are configured for a CSI reporting setting used for NES purposes, condition #1 of Table 10 above may not always be satisfied, and constraints may be applied to ensure that only the NES condition is satisfied.

[0167] Table 11 shows an excerpt from the existing NR standard document TS 38.214 v17.6.0.

[0168] [Table 11]

[0169] Referring to Table 11, the UE determines whether the conditions for a valid CSI report are met based on the Z value and Z' value.

[0170] The Z value is related to the time length from the last symbol of the PDCCH that triggered the CSI report to the first symbol of the CSI report. Specifically, the UE calculates Zref based on the Z value. To meet the requirements for a valid CSI report, the time length from the end of the last symbol of the PDCCH that triggered the CSI report to the start of the CP of the first symbol of the CSI report needs to be at least Zref. Otherwise, the UE may not execute the CSI report requested by the PDCCH because a valid CSI report does not exist.

[0171] The Z' value is related to the time length from the last symbol of the CSI-RS resource to the first symbol of the CSI report. Specifically, the UE calculates Z'ref based on the Z' value. To meet the requirements for a valid CSI report, the time length from the end of the last symbol of the CSI-RS to the start of the CP of the first symbol of the CSI report needs to be at least Z'ref. Otherwise, the UE may not execute the corresponding CSI report because a valid CSI report does not exist.

[0172] Condition #1 in Table 11 above indicates that feedback can be provided in a shorter time when a large number of conditions are met (such as {maximum SCS is 120 kHz SCS, non-periodic CSI on CSI PUSCH triggered by UL license, L=0 occupied CPUs, the number of CSI-RS resources configured in the CSI report is 1, and the number of antenna ports configured in the corresponding CSI-RS resource is at most 4). Condition #2 in Table 11 above indicates that feedback can be provided in a relatively fast time (although slightly slower than condition #1) when the conditions {wideband CQI / PMI, the number of CSI-RS resources configured in the CSI report is 1, the number of antenna ports set in the corresponding CSI-RS resource is up to 4, type 1 codebook or non-PMI configuration} are met. When more than one sub-configuration is configured for a single CSI report for NES purposes, it may be unclear whether the corresponding condition: {the number of CSI-RS resources configured for the CSI report is 1, and the number of antenna ports configured for the corresponding CSI-RS resource is at most 4} is met.

[0173] First, when determining whether the requirement that "the number of CSI-RS resources configured in the CSI report is one" is met, the following can be considered.

[0174] - For periodic CSI (P-CSI) reports, the condition "the number of CSI-RS resources configured for CSI reporting is one" is considered satisfied only if the sum of the number of CSI-RS resources associated with each of the L sub-configurations configured for the corresponding CSI report setting and the sum of the N sub-configurations activated / triggered via MAC-CE / DCI for semi-persistent CSI (SP-CSI) or aperiodic CSI (AP-CSI) reports is one. Specifically, for Type 1 SD or PD or Type 1 SD+PD adapters, only a single CSI-RS resource can be configured within the corresponding CSI report setting for CMR purposes, and only a single sub-configuration can be configured (for P-CSI reports) or only a single sub-configuration can be activated / triggered (for SP-CSI reports and / or AP-CSI reports). Alternatively, for Type 2 SD or Type 2 SD+PD adaptations, a single sub-configuration (for P-CSI reporting) can be configured, or a single sub-configuration (for SP-CSI reporting and / or AP-CSI reporting) can be activated / triggered, and the number of CSI-RS resources associated with that sub-configuration can be limited to one.

[0175] Similarly, when determining whether the requirement that "the maximum number of antenna ports configured for the corresponding CSI-RS resource is 4" is met, the following can be considered.

[0176] - For P-CSI reporting, the condition "the number of antenna ports configured for the corresponding CSI-RS resource is at most 4" is considered satisfied only if the number of antenna ports associated with each of the L sub-configurations configured for the corresponding CSI reporting settings, and the number of N sub-configurations activated / triggered via MAC-CE / DCI for SP-CSI or AP-CSI reporting, is at most 4. Specifically, for Type 1 SD or Type 1 SD+PD adapters, the number of antenna ports (if not configured, the antenna ports configured in the associated CSI-RS resource) based on the port subset indication information configured for the configured sub-configuration (for P-CSI reporting) or the activated / triggered sub-configuration (for SP-CSI reporting and / or AP-CSI reporting) can be limited to 4 or fewer. Alternatively, for Type 2 SD or PD or Type 2 SD+PD adapters, the number of antenna ports provided by the CSI-RS resource configured in the corresponding CSI reporting settings can be limited to 4 or fewer.

[0177] Alternatively, when configuring one or more sub-configurations for a CSI report setting for NES purposes, constraints can be imposed such that condition #1 of Table 11 above is not always satisfied and only condition #2 or condition #3 is satisfied, or condition #1 and condition #2 of Table 11 above are not always satisfied and only condition #3 is satisfied.

[0178] When the CSI report settings include a list of sub-configurations, ambiguity may arise when determining (Z, Z'). Simply checking whether condition #1, condition #2, etc., is satisfied for each sub-configuration to determine (Z, Z') can lead to excessive processing overhead for the UE when determining combinations of (Z, Z').

[0179] Here, (i) the (Z, Z') value according to condition #1 (i.e., the (Z1, Z1') value in Table 5.4-1) is less than the (Z, Z') value according to condition #2 (i.e., the (Z1, Z1') value in Table 5.4-2), and (ii) the (Z, Z') value according to condition #2 (i.e., the (Z1, Z1') value in Table 5.4-2) is less than the (Z, Z') value according to condition #3 (i.e., the (Z2, Z2') value in Table 5.4-2). Therefore, when using the (Z, Z') value according to condition #3 (which ensures the most sufficient CSI processing time), the advantage is that the UE can ensure the CSI processing time without having to check separately whether conditions #1 and condition #2 are satisfied for each sub-configuration.

[0180] In other words, even if CSI calculation is possible for some sub-configurations only if the CSI processing time is guaranteed according to condition #1 (or condition #2), the CSI processing time according to condition #3 may be required for some other sub-configurations. In this case, it may be a drawback to increase the processing overhead of the UE when the conditions for each sub-configuration are checked separately to use the minimum (Z, Z') value and the (Z, Z') value is determined based on the specific sub-configuration that requires the maximum (Z, Z') value among these sub-configurations. To solve this problem, it is proposed to use a relatively large (Z, Z') value according to condition #3, which can be satisfied by all sub-configurations without having to check all sub-configurations one by one.

[0181] The reports “ssb-Index-SINR”, “cri-SINR”, “ssb-Index-SINR-Index”, or “cri-SINR-Index” in Table 11 are related to beam management. That is, (i) “Table 5.4-2 (Z1, Z1'), if the CSI to be transmitted corresponds to the wideband frequency granularity, where the reportQuantity is set to “ssb-Index-SINR”, “cri-SINR”, “ssb-Index-SINR-Index”, or “cri-SINR-Index”, or” and (ii) “Table 5.4-2 (Z3, Z3'), if the reportQuantity is set to “cri-RSRP”, “ssb-Index-RSRP”, “cri-RSRP-Index”, or “ssb-Index-RSRP-Index”, where Xμ is based on the UE reporting capability beamReportTiming, and KBl is based on as in [13, TS] The UE reporting capability beamSwitchTiming, as defined in [38.306], is "related to beam management." However, current NES behavior does not apply to beam management, so condition #3 can be applied directly without considering whether the sub-configurations configured for NES meet the conditions for beam management. More specifically, when configuring CSI reporting settings in the UE that include a list of sub-configurations, the UE does not expect the higher-layer parameter reportQuantity to be configured as "cri-RSRP", "cri-SINR", "cri-SINR-Index", "cri-RSRP-Index", "none", "ssb-Index-RSRP", "ssb-Index-SINR", " The CSI reporting settings are configured with "ssb-Index-RSRP-Index", "ssb-Index-SINR-Index", or "tdcp". Therefore, when a CSI reporting setting including a list of sub-configurations is configured in the UE, the UE can directly apply condition #3 without having to consider whether the conditions applied when reportQuantity is configured as "cri-RSRP", "ssb-Index-RSRP", "cri-RSRP-Index", or "ssb-Index-RSRP-Index", "ssb-Index-SINR", "cri-SINR", "ssb-Index-SINR-Index", or "cri-SINR-Index" are met.

[0182] Figure 8 This is a graph used to explain the determination of CSI calculation time and valid CSI reports according to the implementation method. Figure 8In order to facilitate explanation, conditions related to beam management are excluded (or assumed not to be met).

[0183] Reference Figure 8 The UE can determine (Z, Z') differently depending on whether the CSI report settings include sub-configurations (805). Determining the (Z, Z') value by using only condition #3 as described above can be limited to cases where the CSI report settings include a list of sub-configurations. In other words, if the CSI report settings do not include a list of sub-configurations, the conditions including conditions #1 and #2 are checked as previously described, and if the remaining conditions are not met, the (Z, Z') value can be determined based on condition #3.

[0184] For example, if the CSI report settings do not include a list of sub-configurations and condition #1 is met, the UE can determine the (Z, Z') value (810Y, 815) based on the first (Z1, Z1'). The first (Z1, Z1') can represent (Z1, Z1') from Table 5.4-1 included in Table 11.

[0185] For example, if the CSI report settings do not include a list of sub-configurations and condition #2 is met, the UE can determine the (Z, Z') value (820Y, 825) based on the second (Z1, Z1'). The second (Z1, Z1') can represent (Z1, Z1') from Table 5.4-2 included in Table 11.

[0186] Conditions #1 and #2 can each be conditions related to a CSI with a maximum of 4 CSI-RS ports for a single resource. Specifically, condition #1 can indicate that a CSI is triggered when max{μPDCCH, μCSI-RS, μUL}≤3 and L=0 CPU is occupied (as per section 5.2.1.6), without a PUSCH containing a transport block or HARQ-ACK or both, and the CSI to be sent is a single CSI corresponding to a wideband frequency granularity, and indicates that the CSI corresponds to a maximum of 4 CSI-RS ports in a single resource without a CRI report, and the CodebookType is configured as “typeI-SinglePanel” or the reportQuantity is configured as “cri-RI-CQI”. Condition #2 can indicate that the CSI to be sent corresponds to a wideband frequency granularity, corresponds to a maximum of 4 CSI-RS ports in a single resource without a CRI report, and the CodebookType is configured as “typeI-SinglePanel” or the reportQuantity is set to “cri-RI-CQI”.

[0187] When the CSI report settings do not include a list of sub-configurations and neither condition #1 nor condition #2 is met, the UE can determine (Z, Z') (820N, 830) based on (Z2, Z2') in Table 5.4-2.

[0188] Alternatively, when the CSI report settings include a list of sub-configurations (regardless of both condition #1 and condition #2), the UE can determine (Z, Z') (805Y, 830) solely based on (Z2, Z2') in Table 5.4-2.

[0189] The UE can determine whether the valid CSI report requirement is met based on the determined (Z, Z') (835). Specifically, the UE can determine (Zref, Z'ref) based on the determined (Z, Z'). The UE can determine that the valid CSI report requirement is met and can execute the CSI report if the interval from the end of the last symbol of the PDCCH that triggered the CSI report to the start of the CP of the first symbol of the CSI report is greater than or equal to Zref, and the interval from the end of the last symbol of the CSI-RS resource to the start of the CP of the first symbol of the CSI report is greater than or equal to Z'ref. Otherwise, the UE can determine that the requested CSI report is invalid and can not execute the CSI report.

[0190] For example, this can be defined in the standard shown in Table 12 below.

[0191] [Table 12]

[0192] [Proposal #3] Define the CPU usage interval for CSI reports with one or more sub-configurations.

[0193] Table 13 shows an excerpt from the existing NR standard document TS 38.214 v17.6.0.

[0194] [Table 13]

[0195] Based on Table 13 above, for cases #1 / case #2 / case #3 (in cases with CSI reporting settings having one or more sub-configuration sets), it may be unclear which CSI-RS resource is associated.

[0196] - For P-CSI reports, the CPU usage interval can be defined as case #1 above, only for CSI-RS resources linked to the L sub-configurations of the configuration.

[0197] - For SP-CSI reports, the CPU usage interval can be defined as Case #1 / Case #2 above, and is only used for CSI-RS resources associated with N sub-configurations of the L configured sub-configurations that are activated or triggered by MAC CE (for SP-CSI reports on PUCCH) or DCI (for SP-CSI reports on PUSCH).

[0198] - For AP-CSI reports, the CPU usage interval can be defined as case #3 above, which is only used for CSI-RS resources associated with N sub-configurations triggered by DCI out of the L configured sub-configurations.

[0199] The corresponding approach can be applied only in the case of Type 2 SD or SD+PD adaptation (i.e., only a subset of CSI-RS resources associated with CSI reporting settings can be associated within a sub-configuration).

[0200] [Proposal #4] Validity checks and CSI reporting methodologies for CSI reports with one or more sub-configurations

[0201] Table 14 shows an excerpt from the existing NR standard document TS 38.214 v17.6.0.

[0202] [Table 14]

[0203] When the CSI processing time and resulting UE action can be defined as described in Table 14 above, the following issues may arise for CSI reporting settings configured with one or more sub-configurations, and the solutions for each issue are as follows.

[0204] - Question 1: Methods for checking the validity of CSI reports

[0205] When configuring multiple sub-configurations (for P-CSI reporting) or activating / triggering multiple sub-configurations (for SP / AP-CSI reporting), validity checks can be performed individually for each sub-configuration. Alternatively, the method can be configured to be performed separately via sub-configuration or via CSI reporting, as described above.

[0206] - Question 2: Clarification of CSI-RS resources that may be involved in determining the starting point of Z'.

[0207] For AP-CSI reports, the starting point of Z' can be determined only for the CSI-RS resources associated with N sub-configurations triggered by DCI among the L configured sub-configurations.

[0208] - Question 3: Handling situations where the Z' timeline is not met

[0209] (i) When multiple sub-configurations are activated and some sub-configurations meet the Z' timeline (for convenience, the corresponding sub-configurations are named valid sub-configurations), but other sub-configurations do not meet the Z' timeline (for convenience, the corresponding sub-configurations are named invalid sub-configurations), Option 1) can discard / omit the CSI information corresponding to the invalid sub-configurations, and can only configure the CSI information corresponding to the valid sub-configurations, so that the UE can provide feedback / report to the BS. Alternatively, Option 2) the UE can provide feedback / report to the BS the CSI information corresponding to all sub-configurations, but the CSI information corresponding to the invalid sub-configurations may not be updated from previous reports, or may be reported with default values ​​(in this disclosure, default values ​​may refer to values ​​pre-configured or defined by the BS, and may be, for example, the minimum CQI / PMI value).

[0210] (ii) Even if multiple sub-configurations are activated and the Z' timeline is met for some sub-configurations (these sub-configurations are named valid sub-configurations for convenience), but the Z' timeline is not met for other sub-configurations (these sub-configurations are named invalid sub-configurations for convenience), the entire CSI report is handled in the same way as when the existing Z' timeline is not met (i.e., if the number of triggered reports is one and there is no multiplexing of HARQ-ACK or transport block on the PUSCH, the UE can ignore scheduling DCI. Otherwise, the UE does not need to update the CSI for the nth triggered CSI report).

[0211] (iii) The solution to the problem can be applied if the validity check is performed separately for each sub-configuration as described in Problem 1 above.

[0212] The corresponding method can be applied only in the case of Type 2 SD or SD+PD adaptation (i.e., only a subset of CSI-RS resources associated with CSI reporting settings can be associated within a sub-configuration).

[0213] Figure 9 Examples of the operation of the UE and the network according to the implementation are illustrated.

[0214] Reference Figure 9 The UE can receive CSI report settings (905) from the network via higher-layer signaling, which includes a list of one or more sub-configurations.

[0215] The UE can calculate CSI (910) based on the proposed method of CPU usage, CSI-RS resource / port count and / or CSI processing time.

[0216] The UE can send the calculated CSI to the network for CSI reporting settings (915).

[0217] Figure 10An example of a non-periodic CSI report according to an implementation method is shown.

[0218] The UE can receive CSI report settings (A05) from the network via higher-layer signaling. It is assumed that at least one of the CSI report settings contains a list of sub-configurations. For each sub-configuration, at least one of the following can be configured individually: CSI codebook, enabling a subset of CSI-RS antenna ports, CSI-RS resource subset, or power offset information.

[0219] The UE can receive CSI requests from the network (A10). CSI requests can be received via the DCI included in the PDCCH. A CSI request can be a request to send CSI reports non-periodically based on a list of CSI report settings including sub-configurations.

[0220] The UE can determine the validity of the requested non-periodic CSI report (A15). The UE can determine (Z, Z') and can determine (Zref, Z'ref) based on this. The UE can determine the validity of the requested non-periodic CSI report based on the determined (Zref, Z'ref). The Z value (and / or Zref) can be related to the time length from the end of the last symbol of the PDCCH to the start of the CP of the first symbol of the CSI report. The Z' value (and / or Z'ref) can be related to the time length from the end of the last symbol of the CSI-RS resource to the start of the CP of the first symbol of the CSI report.

[0221] Based on the fact that non-periodic CSI reports are related to the CSI report settings that include a list of sub-configurations, the UE can determine the Z and Z' values ​​solely based on Z2 and Z2' from Table 5.4-2, which is included in Table 11 above.

[0222] If the UE determines that the requested non-periodic CSI report is valid, the UE can calculate and report CSIs (A20 and A25). Non-periodic CSI reports can be sent on the PUSCH.

[0223] Figure 11 The flow of UE operation according to the implementation method is illustrated.

[0224] Reference Figure 11 The UE can receive Channel State Information (CSI) report configuration (B05) via higher-layer signaling.

[0225] The UE can receive downlink control information (DCI) (B10) containing information for CSI requests via the physical downlink control channel (PDCCH).

[0226] The UE can send a CSI report related to the CSI request based on whether the conditions for a valid CSI report are met (B15).

[0227] The UE can determine whether the conditions for a valid CSI report are met based on the Z value and Z' value. The Z value can be related to the time length from the last symbol of the PDCCH to the first symbol of the CSI report, and the Z' value can be related to the time length from the last symbol of the CSI-RS resource to the first symbol of the CSI report.

[0228] Based on the CSI report configuration, which includes a list of sub-configurations for individually configuring the CSI codebook, enabling a subset of CSI-RS antenna ports, a subset of CSI-RS resources, or power offset information for each sub-configuration, the UE can determine the Z and Z' values ​​based on only a subset of the multiple (Z, Z') candidate values.

[0229] Based on the list of sub-configurations included in the CSI report configuration, the UE can determine the Z value and Z' value solely based on a third (Z, Z') candidate value that excludes the first (Z, Z') candidate value and the second (Z, Z') candidate value for each of a plurality of conditions related to CSI for no more than 4 CSI-RS ports for a single resource.

[0230] Multiple conditions include a first condition, which can be satisfied if: (i) the number associated with the subcarrier spacing (SCS) is less than a threshold; (ii) CSI is triggered when 0 CSI processing units (CPUs) are occupied; (iii) the physical uplink shared channel (PUSCH) used to send the CSI report does not include either a transport block or a HARQ-ACK; (iv) the CSI report does not include a CSI-RS resource indicator (CRI) and has a wideband frequency granularity of up to 4 CSI-RS ports or fewer for a single resource; and (v) the codebook type is a single panel or the report content is configured as a cri-rank indicator-channel quality indicator (cri-RI-CQI).

[0231] The second condition is among several conditions and can be met if: (iv) the CSI report does not include a CSI-RS Resource Indicator (CRI) and has a wideband frequency granularity of up to 4 CSI-RS ports or fewer for a single resource, and (v) the codebook type is a single panel or the report content is configured as a cri-rank indicator-channel quality indicator (cri-RI-CQI).

[0232] Multiple (Z, Z') candidate values ​​can include a first (Z, Z') candidate value, a second (Z, Z') candidate value greater than the first (Z, Z') candidate value for the same parameter set, and a third (Z, Z') candidate value greater than the first (Z, Z') candidate value and the second (Z, Z') candidate value for the same parameter set. Based on the list of sub-configurations included in the CSI report configuration, the UE can determine the Z value and Z' value based solely on the third (Z, Z') candidate value.

[0233] The Z value can be correlated with the time length from the end of the last symbol of the PDCCH to the start of the cyclic prefix (CP) of the first symbol in the CSI report, and the Z' value can be correlated with the time length from the end of the last symbol of the CSI-RS resource to the start of the CP of the first symbol in the CSI report.

[0234] Based on the list of sub-configurations included in the CSI report configuration, the UE can determine the Z value and Z' value based solely on Z2 and Z2' from Table 5.4-2 included in Table 11 above.

[0235] Figure 12 The flow of BS operation according to the implementation method is illustrated.

[0236] Reference Figure 12 The BS can send Channel State Information (CSI) report configuration (C05) via higher-layer signaling.

[0237] The BS can send downlink control information (DCI) (C10) containing information for the CSI request via the physical downlink control channel (PDCCH).

[0238] BS can receive CSI reports related to CSI requests based on whether the conditions for a valid CSI report are met (C15).

[0239] Whether the conditions for a valid CSI report are met can be determined based on the Z-value and Z'-value. The Z-value can be related to the time length from the last symbol of the PDCCH to the first symbol of the CSI report, and the Z'-value can be related to the time length from the last symbol of the CSI-RS resource to the first symbol of the CSI report.

[0240] Based on the CSI report configuration, which includes a list of sub-configurations for individually configuring the CSI codebook, enabling a subset of CSI-RS antenna ports, a subset of CSI-RS resources, or power offset information for each sub-configuration, the UE can determine the Z and Z' values ​​based on only a subset of the multiple (Z, Z') candidate values.

[0241] Based on the list of sub-configurations included in the CSI report configuration, the BS can determine the Z value and Z' value solely based on the third (Z, Z') candidate value, which excludes the first (Z, Z') candidate value and the second (Z, Z') candidate value for each of the multiple conditions related to CSI for a single resource with no more than 4 CSI-RS ports.

[0242] Multiple conditions include a first condition, which can be satisfied if: (i) the number associated with the subcarrier spacing (SCS) is less than a threshold; (ii) CSI is triggered when 0 CSI processing units (CPUs) are occupied; (iii) the physical uplink shared channel (PUSCH) used to send the CSI report does not include either a transport block or a HARQ-ACK; (iv) the CSI report does not include a CSI-RS resource indicator (CRI) and has a wideband frequency granularity of up to 4 CSI-RS ports or fewer for a single resource; and (v) the codebook type is a single panel or the report content is configured as a cri-rank indicator-channel quality indicator (cri-RI-CQI).

[0243] The second condition is among several conditions and can be met if: (iv) the CSI report does not include a CSI-RS Resource Indicator (CRI) and has a wideband frequency granularity of up to 4 CSI-RS ports or fewer for a single resource, and (v) the codebook type is a single panel or the report content is configured as a cri-rank indicator-channel quality indicator (cri-RI-CQI).

[0244] Multiple (Z, Z') candidate values ​​can include a first (Z, Z') candidate value, a second (Z, Z') candidate value greater than the first (Z, Z') candidate value for the same parameter set, and a third (Z, Z') candidate value greater than both the first (Z, Z') and second (Z, Z') candidate values ​​for the same parameter set. Based on the list of sub-configurations included in the CSI report configuration, the BS can determine the Z and Z' values ​​based solely on the third (Z, Z') candidate value.

[0245] The Z value can be correlated with the time length from the end of the last symbol of the PDCCH to the start of the cyclic prefix (CP) of the first symbol in the CSI report, and the Z' value can be correlated with the time length from the end of the last symbol of the CSI-RS resource to the start of the CP of the first symbol in the CSI report.

[0246] Based on the list of sub-configurations included in the CSI report configuration, the BS can determine the Z and Z' values ​​solely based on Z2 and Z2' from Table 5.4-2, which are included in Table 11 above.

[0247] Figure 13A communication system 1 applied to this disclosure is shown.

[0248] Reference Figure 13 The communication system 1 includes wireless devices, base stations (BS), and networks. In this document, a wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G New RAT (NR) or Long Term Evolution (LTE)) and may be referred to as a communication / radio / 5G device. Wireless devices may include (but are not limited to) robots 100a, vehicles 100b-1 and 100b-2, extended reality (XR) devices 100c, handheld devices 100d, home appliances 100e, Internet of Things (IoT) devices 100f, and artificial intelligence (AI) devices / servers 400. For example, vehicles may include vehicles with wireless communication capabilities, autonomous vehicles, and vehicles capable of performing communication between vehicles. In this document, vehicles may include unmanned aerial vehicles (UAVs) (e.g., drones). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices, and may take the form of head-mounted displays (HMDs), head-up displays (HUDs) installed in vehicles, televisions, smartphones, computers, wearable devices, home appliances, digital signage, vehicles, robots, etc. Handheld devices may include smartphones, smart tablets, wearable devices (e.g., smartwatches or smart glasses) and computers (e.g., laptops). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors and smart meters. For example, the BS and network may be implemented as wireless devices, and a particular wireless device 200a may operate as a BS / network node relative to other wireless devices.

[0249] Wireless devices 100a to 100f can connect to network 300 via BS 200. AI technology can be applied to wireless devices 100a to 100f, and wireless devices 100a to 100f can connect to AI server 400 via network 300. Network 300 can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although wireless devices 100a to 100f can communicate with each other via BS 200 / network 300, wireless devices 100a to 100f can perform direct communication with each other (e.g., sidelink communication) without going through the BS / network. For example, vehicles 100b-1 and 100b-2 can perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0250] Wireless communication / connections 150a, 150b, or 150c can be established between wireless devices 100a to 100f / BS 200 or between BS 200 and BS 200. In this document, wireless communication / connections can be established via various RATs (e.g., 5G NR) such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication), or inter-BS communication (e.g., relay, integrated access backhaul (IAB)). Wireless devices and BS / wireless devices can transmit / receive radio signals to / from each other via wireless communication / connections 150a and 150b. For example, wireless communication / connections 150a and 150b can transmit / receive signals via various physical channels. For this purpose, at least a portion of the configuration information for configuring the process of transmitting / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes can be performed based on various proposals of this disclosure.

[0251] Figure 14 A wireless device applicable to this disclosure is shown.

[0252] Reference Figure 14 The first wireless device 100 and the second wireless device 200 can transmit radio signals via various RATs (e.g., LTE and NR). In this document, {first wireless device 100 and second wireless device 200} can correspond to... Figure 13 {Wireless Device 100x and BS 200} and / or {Wireless Device 100x and Wireless Device 100x}.

[0253] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and additionally include one or more transceivers 106 and / or one or more antennas 108. The processors 102 may control the memories 104 and / or the transceivers 106, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. For example, the processor 102 may process information in the memory 104 to generate a first information / signal, and then transmit a radio signal including the first information / signal via the transceivers 106. The processor 102 may receive a radio signal including a second information / signal via the transceivers 106, and then store the information obtained by processing the second information / signal in the memory 104. The memory 104 may be connected to the processor 102 and may store various information relating to the operation of the processor 102. For example, the memory 104 may store software code including commands for performing some or all of the processes controlled by the processor 102 or for performing the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. In this document, processor 102 and memory 104 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). Transceiver 106 may be connected to processor 102 and transmit and / or receive radio signals via one or more antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. Transceiver 106 may be used interchangeably with radio frequency (RF) units. In this disclosure, a wireless device may refer to a communication modem / circuit / chip.

[0254] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and additionally include one or more transceivers 206 and / or one or more antennas 208. The processors 202 may control the memories 204 and / or the transceivers 206, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. For example, the processors 202 may process information in the memories 204 to generate a third information / signal, and then transmit a radio signal including the third information / signal via the transceivers 206. The processors 202 may receive a radio signal including a fourth information / signal via the transceivers 206, and then store the information obtained by processing the fourth information / signal in the memories 204. The memories 204 may be connected to the processors 202 and may store various information relating to the operation of the processors 202. For example, the memories 204 may store software code including commands for executing some or all of the processes controlled by the processors 202 or for executing the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. In this document, processor 202 and memory 204 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). Transceiver 206 may be connected to processor 202 and transmit and / or receive radio signals via one or more antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. Transceiver 206 may be used interchangeably with an RF unit. In this disclosure, a wireless device may refer to a communication modem / circuit / chip.

[0255] The hardware elements of wireless devices 100 and 200 will be described in more detail below. One or more protocol layers may be implemented by (but are not limited to) one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). One or more processors 102 and 202 may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) according to the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors 102 and 202 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information, according to the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document, and provide the generated signals to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive signals (e.g., baseband signals) and acquire PDUs, SDUs, messages, control information, data, or information from one or more transceivers 106 and 206, according to the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document.

[0256] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. As an example, one or more application-specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field-programmable gate arrays (FPGAs) may be included in one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204 to be driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document can be implemented using firmware or software in the form of code, commands, and / or command sets.

[0257] One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, code, instructions, and / or commands. One or more memories 104 and 204 may be configured with read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard disk drive, registers, cache memory, computer-readable storage media, and / or combinations thereof. One or more memories 104 and 204 may be located internally and / or externally to one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 via various technologies such as wired or wireless connections.

[0258] One or more transceivers 106 and 206 may transmit user data, control information, and / or radio signals / channels mentioned in the methods and / or operation flowcharts of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and transmit and receive radio signals. For example, one or more processors 102 and 202 may perform controls to enable one or more transceivers 106 and 206 to transmit user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may perform controls to enable one or more transceivers 106 and 206 to receive user data, control information, or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to transmit and receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein via one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received radio signals / channels, etc., from RF band signals to baseband signals for processing by one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc., processed by one or more processors 102 and 202 from baseband signals to RF band signals. For this purpose, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0259] The above embodiments correspond to combinations of the elements and features of this disclosure in a prescribed form. Furthermore, unless explicitly stated otherwise, each element or feature may be considered optional. Each element or feature may be implemented without combination with other elements or features. Moreover, embodiments of this disclosure can be implemented by partially combining elements and / or features together. The order of operations described for various embodiments of this disclosure may be modified. Some configurations or features of one embodiment may be included in another embodiment, or may replace corresponding configurations or features of another embodiment. Furthermore, it will be readily understood that embodiments are configured by combining claims not explicitly referenced in the appended claims, or may be included as new claims after filing the application.

[0260] Those skilled in the art will understand that this disclosure may be practiced in other specific forms besides those set forth herein without departing from the spirit and essential characteristics of this disclosure. Therefore, the above embodiments should be construed in all respects as illustrative rather than restrictive. The scope of this disclosure should be determined by the appended claims and their legal equivalents, and not by the foregoing description, and all changes falling within the meaning and scope of the appended claims are intended to be covered therewith.

[0261] Industrial applicability

[0262] This disclosure applies to UE, BS or other devices in wireless mobile communication systems.

Claims

1. A method performed by a user equipment (UE), the method comprising the following steps: Configure the Channel Status Information (CSI) report received via higher-layer signaling; Downlink control information (DCI), including information regarding CSI requests, is received via the physical downlink control channel (PDCCH). as well as Based on the conditions for a valid CSI report being met, a CSI report related to the CSI request is sent. The UE determines whether the conditions for a valid CSI report are met based on the Z value and Z' value. The Z value is related to the time length from the last symbol of the PDCCH to the first symbol of the CSI report, and the Z' value is related to the time length from the last symbol of the Channel State Information-Reference Signal (CSI-RS) to the first symbol of the CSI report. The CSI report configuration includes a list of sub-configurations for individually configuring at least one of the following: CSI codebook, enabling a subset of CSI-RS antenna ports, a subset of CSI-RS resources, or power offset information for each sub-configuration. The UE determines the Z value and the Z' value based only on a subset of the (Z, Z') candidate values.

2. The method according to claim 1, wherein, Based on the list of sub-configurations included in the CSI report configuration, the UE determines the Z value and the Z' value solely based on a third (Z, Z') candidate value that excludes a first (Z, Z') candidate value and a second (Z, Z') candidate value for each of a plurality of conditions related to CSI for a single resource not exceeding 4 CSI-RS ports.

3. The method according to claim 2, wherein, The plurality of conditions includes a first condition, and The first condition is satisfied under the following conditions: (i) the set of parameters related to the subcarrier spacing SCS is less than a threshold; (ii) CSI is triggered when 0 CSI processing units CPU are occupied; (iii) the physical uplink shared channel PUSCH used to send the CSI report does not include a transport block or HARQ-ACK; (iv) the CSI report does not include the CSI-RS resource indicator CRI and has a wideband frequency granularity of up to 4 CSI-RS ports or fewer for a single resource; and (v) the codebook type is a single panel or the report content is configured as cri-rank indicator-channel quality indicator cri-RI-CQI.

4. The method according to claim 3, wherein, The plurality of conditions includes a second condition, and The second condition is satisfied in the following cases: (iv) the CSI report does not include the CSI-RS Resource Indicator (CRI) and has a wideband frequency granularity of up to 4 CSI-RS ports or fewer for a single resource, and (v) the codebook type is a single panel or the report content is configured as cri-rank indicator-channel quality indicator cri-RI-CQI.

5. The method according to claim 1, wherein, The plurality of (Z, Z') candidate values ​​includes a first (Z, Z') candidate value, a second (Z, Z') candidate value greater than the first (Z, Z') candidate value for the same parameter set, and a third (Z, Z') candidate value greater than both the first (Z, Z') candidate value and the second (Z, Z') candidate value for the same parameter set. Specifically, based on the list of sub-configurations included in the CSI report configuration, the UE determines the Z value and the Z' value only based on the third (Z, Z') candidate value.

6. The method according to claim 1, wherein, The Z value is related to the time length from the end of the last symbol of the PDCCH to the start of the cyclic prefix CP of the first symbol reported by the CSI, and The Z' value is related to the time length from the end of the last symbol of the CSI-RS resource to the start of the CP of the first symbol of the CSI report.

7. The method according to claim 1, wherein, Based on the list of sub-configurations included in the CSI report configuration, the UE determines the Z value and the Z' value solely based on Table A below: [Table A] 。 8. A non-transitory recording medium configured to store instructions that, when executed by a processor of a user equipment (UE), cause the UE to perform the method according to claim 1.

9. An apparatus comprising: At least one memory, the at least one memory being configured to store instructions; as well as At least one processor, the at least one processor being configured to perform the operation by executing the instructions. The operations performed by the at least one processor include: Configure the Channel Status Information (CSI) report received via higher-layer signaling; Downlink control information (DCI), including information regarding CSI requests, is received via the physical downlink control channel (PDCCH); and Based on the conditions for a valid CSI report being met, a CSI report related to the CSI request is sent. The device determines whether the conditions for a valid CSI report are met based on Z and Z' values. The Z value is related to the time length from the last symbol of the PDCCH to the first symbol of the CSI report, and the Z' value is related to the time length from the last symbol of the Channel State Information-Reference Signal (CSI-RS) to the first symbol of the CSI report. The CSI report configuration includes a list of sub-configurations for individually configuring at least one of the following: CSI codebook, enabling a subset of CSI-RS antenna ports, a subset of CSI-RS resources, or power offset information for each sub-configuration. The device determines the Z value and the Z' value based only on a subset of (Z, Z') candidate values.

10. The apparatus according to claim 9, wherein, The device also includes a transceiver, and The device is a user equipment (UE) configured to operate in a wireless communication system.

11. The apparatus according to claim 9, wherein, The apparatus is a processing apparatus configured to control a user equipment (UE) in a wireless communication system.

12. A method performed by a base station (BS), the method comprising the following steps: Configuration for sending Channel State Information (CSI) reports via higher-layer signaling; Downlink control information (DCI) including information regarding CSI requests is transmitted via the physical downlink control channel (PDCCH). as well as Based on the conditions for a valid CSI report, the CSI report related to the CSI request is received. Whether the conditions for a valid CSI report are met is determined based on the Z value and the Z' value. The Z value is related to the time length from the last symbol of the PDCCH to the first symbol of the CSI report, and the Z' value is related to the time length from the last symbol of the Channel State Information-Reference Signal (CSI-RS) to the first symbol of the CSI report. The CSI report configuration includes a list of sub-configurations for individually configuring at least one of the following: CSI codebook, enabling a subset of CSI-RS antenna ports, a subset of CSI-RS resources, or power offset information for each sub-configuration. The Z value and the Z' value are determined based only on a subset of (Z, Z') candidate values.

13. An apparatus comprising: At least one memory, the at least one memory being configured to store instructions; as well as At least one processor, the at least one processor being configured to perform the operation by executing the instructions. The operations performed by the at least one processor include: Configuration for sending Channel State Information (CSI) reports via higher-layer signaling; Downlink control information (DCI) including information regarding CSI requests is transmitted via the physical downlink control channel (PDCCH); and Based on the conditions for a valid CSI report, the CSI report related to the CSI request is received. Whether the conditions for a valid CSI report are met is determined based on the Z value and the Z' value. The Z value is related to the time length from the last symbol of the PDCCH to the first symbol of the CSI report, and the Z' value is related to the time length from the last symbol of the Channel State Information-Reference Signal (CSI-RS) to the first symbol of the CSI report. The CSI report configuration includes a list of sub-configurations for individually configuring at least one of the following: CSI codebook, enabling a subset of CSI-RS antenna ports, a subset of CSI-RS resources, or power offset information for each sub-configuration. The Z value and the Z' value are determined based only on a subset of (Z, Z') candidate values.

14. The apparatus according to claim 13, wherein, The device also includes a transceiver, and The device is a base station (BS) configured to operate in a wireless communication system.

15. The apparatus according to claim 13, wherein, The device is a processing device configured to control a base station (BS) in a wireless communication system.

Images