Terminal, wireless communication method, base station, and system

Abstract

A terminal according to one embodiment of the present disclosure includes: a reception unit that receives the setting of a plurality of combinations of candidate values of a parameter pertaining to the number of spatial domain basis vectors with respect to N-transmission / reception points; and a control unit that, on the basis of said setting, controls the reporting of one combination based on the plurality of combinations.

Description

Terminal, wireless communication method and base station The present disclosure relates to a terminal, a wireless communication method, and a base station in a next-generation mobile communication system. Long Term Evolution (LTE) has been specified for the purpose of achieving higher data rates and lower latency in Universal Mobile Telecommunications System (UMTS) networks (Non-Patent Document 1). Also, LTE-Advanced (3GPP Rel. 10-14) has been specified for the purpose of achieving higher capacity and greater sophistication of LTE (Third Generation Partnership Project (3GPP (registered trademark)) Release (Rel.) 8, 9). Successor systems to LTE (e.g., 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 or later, etc.) are also being considered. 3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010 In future wireless communication systems (e.g., NR), it is considered that channel state information (CSI) based on reception of a reference signal will be reported. In addition, it is considered that multiple transmission / reception points (TRPs, Multi TRP (MTRP)) or multiple panels (multiple panels, multi-panel) will perform DL transmission to a terminal (user terminal, User Equipment (UE)). In addition, coherent joint transmission (CJT) using multi-TRP / multi-panel is being considered. However, the CSI / codebook for CJT has not been fully studied. Unless such a method is clearly defined, there is a risk that communication throughput, communication quality, etc. will deteriorate. Therefore, one of the objectives of the present disclosure is to provide a terminal, a wireless communication method, and a base station that determine an appropriate CSI / codebook for CJT. A terminal according to one aspect of the present disclosure has a receiving unit that receives a setting of multiple combinations of candidate values ​​of a parameter related to the number of spatial domain basis vectors for N transmitting and receiving points, and a control unit that controls reporting of one combination based on the multiple combinations based on the setting. According to one aspect of the present disclosure, an appropriate CSI / codebook for CJT can be determined. FIG. 1 shows an example of a 16-level quantization table. FIG. 2 shows an example of an 8-level quantization table. FIGs. 3A and 3B show an example of an extended type 2 port selection codebook. FIGs. 4A and 4B show an example of an extended type 2 port selection codebook. FIG. 5 shows an example of a parameter combination for a Rel. 16 type 2 codebook. FIG. 6 shows an example of a parameter combination for a Rel. 17 type 2 port selection codebook. FIG. 7 shows an example of an NZC according to embodiment #B2. FIG. 8 shows another example of an NZC according to embodiment #B2. FIG. 9 shows an example of a combination of embodiment #C1 and embodiment #C2. FIGs. 10A to 10D show an example of a mapping of CSI part 1.5. FIG. 11 shows an example of a combination and a bitmap according to embodiment #1. FIG. 12 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 13 is a diagram showing an example of a configuration of a base station according to an embodiment. FIG. 14 is a diagram showing an example of a configuration of a user terminal according to an embodiment. Fig. 15 is a diagram illustrating an example of a hardware configuration of a base station and a user terminal according to an embodiment Fig. 16 is a diagram illustrating an example of a vehicle according to an embodiment. (CSI report or reporting) In Rel. 15 NR, a terminal (also referred to as a user terminal, User Equipment (UE), etc.) generates (also referred to as determining, calculating, estimating, measuring, etc.) channel state information (CSI) based on a reference signal (RS) (or a resource for the RS), and transmits (also referred to as reporting, feedback, etc.) the generated CSI to a network (e.g., a base station). The CSI may be transmitted to the base station, for example, using an uplink control channel (e.g., a Physical Uplink Control Channel (PUCCH)) or an uplink shared channel (e.g., a Physical Uplink Shared Channel (PUSCH)). The RS used to generate the CSI may be, for example, at least one of a Channel State Information Reference Signal (CSI-RS), a Synchronization Signal / Physical Broadcast Channel (SS / PBCH) block, a Synchronization Signal (SS), a DeModulation Reference Signal (DMRS), etc. The CSI-RS may include at least one of a Non Zero Power (NZP) CSI-RS and a CSI-Interference Management (CSI-IM). The SS / PBCH block is a block including an SS and a PBCH (and a corresponding DMRS), and may be referred to as an SS block (SSB), etc. The SS may include at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). In addition, the CSI may include at least one of a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), a CSI-RS Resource Indicator (CRI), a SS / PBCH Block Resource Indicator (SSBRI), a Layer Indicator (LI), a Rank Indicator (RI), L1-RSRP (Layer 1 Reference Signal Received Power), L1-RSRQ (Reference Signal Received Quality), L1-SINR (Signal to Interference plus Noise Ratio), and L1-SNR (Signal to Noise Ratio). The UE may receive information on CSI reporting (report configuration information) and control CSI reporting based on the report configuration information. The report configuration information may be, for example, "CSI-ReportConfig" of an information element (IE) of Radio Resource Control (RRC). In the present disclosure, the RRC IE may be interchangeably read as an RRC parameter, a higher layer parameter, or the like. The reporting configuration information (e.g., the RRC IE "CSI-ReportConfig") may include, for example, at least one of the following: Information regarding the type of CSI report (report type information, e.g., RRC IE "reportConfigType") Information on one or more quantities of CSI to be reported (one or more CSI parameters) (report quantity information, e.g., RRC IE “reportQuantity”) Information on the RS resource used to generate the amount (the CSI parameter) (resource information, for example, “CSI-ResourceConfigId” of the RRC IE) Information on the frequency domain to which the CSI is reported (frequency domain information, for example, the RRC IE "reportFreqConfiguration") For example, the report type information may indicate a periodic CSI (Periodic CSI (P-CSI)) report, an aperiodic CSI (A-CSI) report, or a semi-persistent CSI (Semi-Persistent CSI (SP-CSI)) report. Furthermore, the reporting amount information may specify at least one combination of the above CSI parameters (e.g., CRI, RI, PMI, CQI, LI, L1-RSRP, etc.). The resource information may also be an ID of a resource for the RS. The resource for the RS may include, for example, a non-zero power CSI-RS resource or an SSB, and a CSI-IM resource (for example, a zero power CSI-RS resource). The frequency domain information may also indicate frequency granularity of the CSI report. The frequency granularity may include, for example, a wideband and a subband. The wideband is the entire CSI reporting band. The wideband may be, for example, the entirety of a certain carrier (Component Carrier (CC)), cell, serving cell), or the entirety of a bandwidth part (BWP) in a certain carrier. The wideband may be rephrased as a CSI reporting band, the entire CSI reporting band, etc. Also, a subband is a part of a wideband and may be composed of one or more resource blocks (RBs or PRBs). The size of the subband may be determined according to the size of the BWP (the number of PRBs). The frequency domain information may indicate whether wideband or subband PMI is to be reported (the frequency domain information may include, for example, an RRC IE "pmi-FormatIndicator" used to determine whether wideband PMI reporting or subband PMI reporting is to be performed). The UE may determine the frequency granularity of the CSI report (i.e., whether wideband PMI reporting or subband PMI reporting) based on at least one of the above-mentioned report amount information and frequency domain information. If wideband PMI reporting is configured, one wideband PMI may be reported for the entire CSI reporting band, whereas if subband PMI reporting is configured, a single wideband indication i1 may be reported for the entire CSI reporting band, and one subband indication i2 (e.g., a subband indication for each subband) may be reported for each of the one or more subbands within the entire CSI reporting band. The UE performs channel estimation using the received RS to estimate a channel matrix H. The UE feeds back a PMI determined based on the estimated channel matrix. The PMI may indicate a precoder matrix (also referred to as a precoder) that the UE considers appropriate to use for downlink (DL) transmission to the UE. Each value of the PMI may correspond to one precoder matrix. A set of values ​​of the PMI may correspond to a set of different precoder matrices, called a precoder codebook (also referred to as a codebook). In the space domain, the CSI report may include one or more types of CSI. For example, the CSI may include at least one of a first type (type 1 CSI) used for selecting a single beam and a second type (type 2 CSI) used for selecting a multi-beam. The single beam may be rephrased as a single layer, and the multi-beam may be rephrased as multiple beams. In addition, the type 1 CSI does not assume multi-user multiple input multiple output (MU-MIMO), and the type 2 CSI may assume multi-user MIMO. The codebook may include a codebook for type-1 CSI (also referred to as a type-1 codebook, etc.) and a codebook for type-2 CSI (also referred to as a type-2 codebook, etc.). Furthermore, the type-1 CSI may include type-1 single-panel CSI and type-1 multi-panel CSI, and different codebooks (type-1 single-panel codebook, type-1 multi-panel codebook) may be defined for each. In the present disclosure, Type 1 and Type I may be interpreted as interchangeable. In the present disclosure, Type 2 and Type II may be interpreted as interchangeable. The uplink control information (UCI) type may include at least one of a hybrid automatic repeat reQuest ACKnowledgement (HARQ-ACK), a scheduling request (SR), and CSI. The UCI may be carried by the PUCCH or the PUSCH. In Rel. 15 NR, UCI may contain one CSI part for wideband PMI feedback. CSI report #n contains PMI wideband information if reported. In Rel. 15 NR, UCI can include two CSI parts for subband PMI feedback. CSI part 1 includes wideband PMI information. CSI part 2 includes one wideband PMI information and some subband PMI information. CSI part 1 and CSI part 2 are coded separately. In Rel. 15 NR, the UE is configured by a higher layer with N (N≧1) CSI reporting configuration report settings and M (M≧1) CSI resource configuration resource settings. For example, the CSI reporting configuration (CSI-ReportConfig) includes channel measurement resource settings (resourcesForChannelMeasurement), interference CSI-IM resource settings (csi-IM-ResourceForInterference), interference NZP-CSI-RS settings (nzp-CSI-RS-ResourceForInterference), and report quantity (reportQuantity). Each of the channel measurement resource settings, interference CSI-IM resource settings, and interference NZP-CSI-RS settings is associated with a CSI resource configuration (CSI-ResourceConfig, CSI-ResourceConfigId). The CSI resource configuration includes a list of CSI-RS resource sets (csi-RS-ResourceSetList, for example, an NZP-CSI-RS resource set or a CSI-IM resource set). For both FR1 and FR2, evaluation and provision of CSI reporting for DL ​​multi-TRP and / or multi-panel transmissions is under consideration to enable more dynamic channel / interference hypotheses for NCJT. (Codebook settings) The UE is configured with parameters related to the codebook (CodebookConfig) by higher layer signaling (RRC signaling). The codebook configuration is included in the CSI report configuration (CSI-ReportConfig) of the higher layer (RRC) parameters. In the codebook setting, at least one codebook is selected from a plurality of codebooks including type I-Single Panel, type I-Multi Panel, type II, and type II-Port Selection. The codebook parameters include parameters related to the codebook subset restriction (CBSR) (...Restriction). The CBSR setting is a bit that indicates which PMI reports are allowed ('1') and which are not allowed ('0') for the precoder associated with the CBSR bit. One bit in the CBSR bitmap corresponds to one codebook index / antenna port. (CSI report settings) In addition to the codebook configuration (CodebookConfig), the CSI report configuration (CSI-ReportConfig) of Rel. 16 includes CSI-RS resources for channel measurement (resourcesForChannelMeasurement (CMR)), CSI-RS resources for interference measurement (csi-IM-ResourcesForInterference (ZP-IMR), nzp-CSI-RS-ResourcesForInterference (NZP-IMR)), etc. Among the parameters of CSI-ReportConfig, parameters other than codebookConfig-r16 are also included in the CSI report configuration of Rel. 15. In Rel. 17, an extended CSI reporting configuration (CSI-ReportConfig) for CSI measurement / reporting of multi-TRP using NCJT is considered. In this CSI reporting configuration, two CMR groups corresponding to two TRPs are configured. CMRs in the CMR group may be used for at least one measurement of multi-TRP and single-TRP using NCJT. N CMR pairs of NCJT are configured by RRC signaling. UE may be configured by RRC signaling whether to use CMRs of a CMR pair for single-TRP measurement. For CSI reporting related to multi-TRP / panel NCJT measurements configured by a single CSI reporting configuration, it is considered that at least one of the following options 1 and 2 will be supported. <Option 1> The UE is configured to report X (X=0,1,2) CSIs related to single-TRP measurement hypotheses / hypotheses and one CSI related to NCJT measurements. If X=2, then two CSIs are related to two different single-TRP measurements using CMRs of different CMR groups. <Option 2> The UE may be configured to report one CSI associated with the best measurement result among the measurement hypotheses for the NCJT and single TRP. As described above, in Rel.15 / 16, the CBSR is configured per codebook configuration per CSI reporting configuration, i.e., the CBSR applies to all CMRs etc. within the corresponding CSI reporting configuration. However, in the CSI reporting configuration for multi-TRP in Rel.17, when the above-mentioned options 1 and 2 are applied, the following measurement configuration may be performed. Option 1 (X=0): Measurement of NCJT CSI only. Option 1 (X=1): Measurement of the CSI of the NCJT and the CSI of a single TRP. Option 1 (X=2): Measurement of CSI of NCJT and CSI of single TRP (two TRPs). Option 2: Measure both the CSI of the NCJT and the CSI of a single TRP. (Type 1 Codebook) As the Type 1 codebook (Rel. 15), a Type 1 single panel codebook and a Type 1 multi-panel codebook are specified for the base station panel. In the Type 1 single panel, an antenna model of the CSI antenna port array (logical setting) is specified for (N1, N2). The number of CSI-RS antenna ports P CSI-RS In the Type 1 multi-panel, the number of CSI-RS antenna ports P CSI-RS And (N g , N1, N2), an antenna model of the CSI antenna port array (logical configuration) is specified. For Rel. 15 Type 1 Single Panel CSI, the UE sets the upper layer parameter of codebook type (subType in type1 in codebookType in CodebookConfig) to Type 1 Single Panel ('typeI-SinglePanel'). If the number of layers v is not ∈ {2,3,4}, the PMI value is calculated based on the three codebook indexes i 1,1 ,i 1,2 , i2. If the number of layers v ∈ {2, 3, 4}, the PMI value is 1,1 ,i 1,2 ,i 1,3 , i2. If the number of layers v is not ∈ {2,3,4}, then the composite codebook index i1 = [i 1,1 i 1,2 ]. If the number of layers v ∈ {2,3,4}, then the composite codebook index i1 = [i 1,1 i 1,2 i 1,3 ]. i1 may be an index for the wideband. i2=n may be an index for the subband / phase. P CSI-RSThe supported (N1,N2) and (O1,O2) settings (combinations of values) are defined in the specification. (N1,N2) indicate the number of antenna elements in two dimensions (2D) and are set by the upper layer parameters n1-n2 in moreThanTwo in nrOfAntennaPorts in typeI-SinglePanel. n1-n2 are bitmap parameters of N1O1N2O2 bits. (O1,O2) are the 2D oversampling factors. In the codebook for 1-layer CSI reporting and codebookMode=1, the index i corresponding to the horizontal beam is 1,1 = l = 0, 1, ..., N1O1-1, and the index i corresponds to the vertical beam. 1,2 =m=0,1,...,N2O2-1, i2=n=0,1,2,3, antenna ports 3000 to 2999+P CSI-RS The matrix for the one-layer CSI reporting codebook using 1,1 ,i 1,2 ,i2^(1), where W l,m,n (1) is given by the following equation: where v l,m is the 2D-SD-DFT basis vector with N1 rows and N2 columns (exp(j2πln1 / O1N1)×exp(j2πmn2 / O2N2), n1=0,1,...,N1-1, n2=0,1,...,N2-1). The co-phasing between the polarizations (horizontal polarization and vertical polarization) φ n =exp(jπn / 2), which indicates the phase of one polarization relative to the phase of the other polarization. For Rel. 15 Type 1 multi-panel CSI, compared to Type 1 single panel, in addition to N1 and N2, the number of panels N g is set. For inter-panel co-phasing (phase compensation between panels), i, 1,4 The same SD beam (precoding matrix Wl ) is selected and only the inter-panel phase matching is additionally reported. P CSI-RS Supported (N g The settings (combinations of values) of (N1,N2) and (O1,O2) are defined in the specification. (N1,N2) are set by ng-n1-n2 in typeI-MultiPanel. 1,1 is {0,1,...,N1O1-1}. i 1,2 is {0,1,...,N2O2-1}. q=1,...,N g -1 vs. i 1,4,q i1 is {0,1,2,3}. i2 is {0,1,2,3}. For codebookMode=1, antenna port 3000 to 2999+P CSI-RS The matrix for the one-layer CSI reporting codebook using 1,1 ,i 1,2 ,i 1,4 ,i2^(1), where W l,m,p,n (1) =W l,m,p,n ^1,N g ,1. N g = W_l,m,p,n^1,N for {2,4} g ,1 and W_l,m,p,n^2,N g ,1 (first layer, N g = 2, matrix W for codeBookMode = 1 l,m,p,n 1,2,1 and the second layer, N g = 2, matrix W for codeBookMode = 1 l,m,p,n 2,2,1 and the first layer, N g = 4, matrix W for codeBookMode = 1 l,m,p,n 1,4,1 and the second layer, N g = 4, matrix W for codeBookMode = 1 l,m,p,n 2,4,1 and ) are given by Here, φ n =e jπn / 2N g =2, p=p1, and N g For =4, p=[p1,p2,p3]. φ_p1, φ_p2, and φ_p3 represent inter-panel phase matching. The same beam (SD beam matrix, precoding matrix W l ) is selected, where φ_p1 represents the phase compensation of panel 1 relative to panel 0, φ_p2 represents the phase compensation of panel 2 relative to panel 0, and φ_p3 represents the phase compensation of panel 3 relative to panel 0. (Type 2 Codebook) In this disclosure, a matrix Z with X rows and Y columns may be expressed as Z(X×Y). In Type 2 CSI of Rel. 15, for a given layer l, the generation of a subband-wise (SB-wise) precoding vector is based on the following equation: W l (N t ×N3) = W1W 2,l (X3) N t is the number of antennas / antenna ports. N3 is the total number of precoding (beamforming) matrices (precoders) indicated by the PMI (number of subbands). W1(N t ×2L) is a matrix (SD beam matrix) consisting of L∈{2,4} (oversampled) spatial domain (SD) 2D DFT vectors (SD beams, 2D-DFT vectors). L is the number of beams. The actual number of beams considering horizontal and vertical polarization at one location is 2L. For example, L=2 SD 2D-DFT vectors are respectively b i ,b j It is. 2,l (2L×N3) is the matrix (LC coefficient matrix) consisting of linear combination coefficients (subband complex LC coefficients, combination coefficients) for layer l. 2,l represents the beam selection and co-phasing between the two polarizations. For example, 2,l are ci ,c j For example, the channel vector h is a linear combination of L=2 SD 2D-DFT vectors c i b i ,+c j b j The feedback overhead is mainly due to the LC coefficient matrix W 2,l Also, Type 2 CSI in Rel. 15 only supports ranks 1 and 2. In Type-2 CSI, the channel (channel matrix) for a user is represented by a linear combination of two polarizations and L beams (L 2D-DFT vectors). Type-2 CSI in Rel. 15 supports ranks 1 and 2. (Type 2 Codebook Extension) Type 2 CSI (enhanced type 2 codebook) in Rel. 16 uses frequency domain (FD) compression to reduce the 2,l Rel. 16 Type 2 CSI supports ranks 3 and 4 in addition to ranks 1 and 2. In Type 2 CSI of Rel. 16, for a given layer l, information based on the following formula is reported by the UE: W l = W1W ~ l W f,l H (X4) W 2,l is W ~ l W f,l H It is approximated by the matrix W ~ may be expressed as a W with a tilde (~). ~ l is W ~ 2,l The matrix W may be expressed as f,l H is W f,l is the adjoint matrix of W f,l is obtained by conjugate transpose of For CSI reporting, the UE may be configured with one of two subband sizes. The subbands (CQI subbands) are N PRB SB The number of PMI subbands per CQI subband, R, is defined as consecutive PRBs and may depend on the total number of PRBs in the BWP. The number of PMI subbands per CQI subband, R, is configured by the RRC IE numberOfPMI-SubbandsPerCQI-Subband. R controls the total number of precoding matrices represented by the PMI, N3, as a function of the number of subbands configured in the csi-ReportingBand, the subband size configured by subbandSize, and the total number of PRBs in the BWP. W1(N t ×2L) is a matrix consisting of multiple (oversampled) spatial domain (SD) 2D-DFT (vector, beam). For this matrix, multiple indices of the 2D discrete Fourier transform (2D-DFT) vector and the 2D over-sampling factor are reported. The spatial domain response / distribution represented by the SD 2D-DFT vector may be called the SD beam. W ~ l (2L×M v ) is a matrix of LC coefficients for which up to K0 non-zero coefficients (NZCs, LC coefficients with non-zero amplitude) are reported. The report consists of two parts: a bitmap capturing the NZC positions and the quantized NZCs. W f,l (N3×M v) is a matrix of frequency domain (FD) bases (vectors) for layer l. N3 is the total number of precoding (beamforming) matrices (precoders) indicated by the PMI (number of subbands) as a function of the number of subbands configured in the csi-ReportingBand. The csi-ReportingBand indicates the contiguous or non-contiguous subbands in a BWP for which CSI for that BWP is reported. For each layer, M v FD bases (FD DFT bases). For N3>19, M v FD bases are selected. If N3≦19, log2(C(N3-1,M v -1)) bits are reported, where C(N3-1,M v -1) is N3-1 to M v It represents the number of combinations in which one chooses -1 (combinatorial coefficient C(x,y)) and is also called the binomial coefficient. The frequency domain response / distribution (frequency response) represented by a linear combination of the FD basis vectors and the LC coefficients may be referred to as an FD beam, which may correspond to a delay profile (time response). The PMI subband size is given by CQI subband size / R, where R ∈ {1, 2}. The number of FD bases for a given rank v is M v is ceil(p v ×N3 / R). The number of FD bases is the same for all layers l∈{1,2,3,4}. p v is set by higher layers. The FD basis (DFT) for index t=0,1,...,N3-1 and layer l=1,...,v associated with the precoding matrix (subband) is y t,l (f) =exp(j2πtn 3,l (f) / N3). M vIn the FD basis vectors, the index f=0,1,...,M associated with the FD basis vector v The FD basis vector for -1 is [y 0,l (f) ,y 1,l (f) ,...,y N_3-1,l (f) ] T It is. v The FD basis vectors are M initial ∈{-2M v +1,-2M v +2,...,0}, n 3,l =[n 3,l (0) ,...,n 3,l (M_v-1) ], n 3,l (f) ∈{0,1,...,N3-1}. Matrix W 2,l Each row of represents the channel frequency response of a particular SD beam. If the SD beam is highly directional, the channel taps per beam are limited (the power delay profile is sparse in the time domain). As a result, the channel frequency response per SD beam is highly correlated (approaching flat in the frequency domain). In this case, the channel frequency response can be approximated by a linear combination of a small number of FD bases. For example, M v If f2,f = 2, then the FD basis q and LC coefficient d1 0 ,d2 0 Using the above, the frequency response associated with the SD beam b0 is given by d1 0 f2+,d2 0 f q is approximated by Dominant M v FD bases are selected. M v ≪By setting N3, W ~ l The overhead of W 2,l The overhead is much smaller than that of M vAll or a part of the FD bases are used to approximate the frequency response of each SD beam. A bitmap is used to report only the FD bases selected for each SD beam. If no bitmap is reported, all FD bases are selected for each SD beam. In this case, the NZCs of all FD bases are reported for each SD beam. The number of NZCs in a layer, K l NZ ≦K0=ceil(β×2LM v ) and the NZC number K across all layers NZ ≦2K0=ceil(β×2LM v ), where β is set by higher layers. In the Rel. 16 (enhanced) type 2 codebook, L, β, p v The value of (parameter combination) is determined by the higher layer parameter paramCombination-r16 (codebook parameter setting). Type 2 CSI feedback on PUSCH in Rel. 16 includes two parts. CSI Part 1 has a fixed payload size and is used to identify the number of information bits in CSI Part 2. The size of Part 2 is variable (UCI size depends on the number of NZCs, which is not known to the base station). The UE reports the number of NZCs in CSI Part 1, which determines the size of CSI Part 2. The base station knows the size of CSI Part 2 after receiving CSI Part 1. In enhanced Type-2 CSI feedback, CSI Part 1 includes RI, CQI, and an indication of the total number of non-zero amplitudes (NZC) across layers for enhanced Type-2 CSI. The fields in Part 1 are coded separately. CSI Part 2 includes PMI for enhanced Type-2 CSI. Parts 1 and 2 are coded separately. CSI Part 2 (PMI) includes the oversampling factor, the index of the 2D-DFT basis, and the index M of the initial DFT basis (start offset) for the selected DFT window. initialat least one of: a selected DFT basis for each layer; NZC (amplitude and phase) for each layer; strongest coefficient indicator (SCI) for each layer; and amplitude of strongest coefficient for each layer / polarization. The multiple PMI indices (PMI values, codebook indices) associated with different CSI Part 2 information may be as follows for the l-th layer: ・i 1,1 : Two-dimensional oversampling factor [q1 q2], where q1∈{0,1,...,O1-1} and q2∈{0,1,...,O2-1}. ・i 1,2 : (SD) Multiple indices of 2D-DFT basis (beam). i 1,2 ∈{0,1,...,C(N1N2,L)-1}. ・i 1,5 : Codebook indicator. The index of the (FD)DFT basis for the selected DFT window. i 1,5 ∈{0,1,...,2M v -1}. ・i 1,6,l : Codebook indicator. The (FD) DFT basis selected for the l-th layer. If N3≦19, then i 1,6,l ∈{0,1,...,C(N3-1,M v -1)-1}. If N3>19, i 1,6,l ∈{0,1,...,C(2M v -1,M v -1)-1}. ・i 1,7,l : Bitmap indicator for the lth layer. The non-zero bits in the bitmap are i 2,4,l and i 2,5,l Identifies which coefficients in are reported. 1,7,l =[k l,0 (3) ... k l,M_v-1 (3) ], k l,f (3) =[k l,0,f (3) ... kl,M_v-1,f (3) ], k l,i,f (3) ∈{0,1}. ・i 1,8,l :The strongest coefficient indicator for the lth layer (the largest element k in the amplitude coefficient indicator l,i,f (2) ). ・i 2,3,l : Amplitude coefficient indicator of the coefficients (wideband) (for both polarizations) of the lth layer. i 2,3,l =[k l,0 (1) k l,1 (1) ]. ・i 2,4,l : Amplitude coefficient indicator of the reported coefficient (subband) of the lth layer. i 2,3,l =[k l,0 (2) ... k l,M_v-1 (2) ]. ・i 2,5,l : Phase coefficient indicator of the reported coefficient (subband) of the lth layer. i 2,5,l =[c l,0,f ...c l,M_v-1,f ]. f l * ∈{0,1,...,M v -1}, i 2,4,l Let i be the index of l * ∈{0,1,...,2L-1} is k l,f_l^* (2) Let f be the index of l * and i l * is the strongest coefficient for layer l=1,...,v, i.e., the i 2,4,l Element k of l,i_l^*,f_l^* (2) Identify the codebook index n 3,l is 3,l (f_l^*) Regarding 3,l (f) =(n 3,l (f) -n 3,l(f_l^*) ) mod N3, and after remapping, n 3,l (f_l^*) = 0. The index f is f l * For f=(ff l * ) mod M v After remapping, it is remapped to f l * = 0 (l = 1, ..., v). 2,4,l , i 2,5,l , and i 1,7,l are the amplitude coefficients, phase coefficients, and bitmaps after remapping, respectively. 1,8,l The strongest coefficients in layer l, identified by ∈{0,1,...,2L-1}, are i for v=1. 1,8,l =Σ i=0 i_1^* k l,i,0 (3) -1, and for 1 < v ≤ 4, i 1,8,l =i l * It is given that: W ~ l Each LC coefficient reported in (a complex coefficient) is separately quantized in amplitude and phase. [Amplitude quantization] The polarization-specific reference amplitudes are shown in the table of Figure 1 (amplitude coefficient indicator i 2,3,l Mapping of elements in: Amplitude coefficient indicator element k l,p (1) from the amplitude coefficient p l,p (1) This table uses 16-level quantization with a mapping to p l (1) =[p l,0 (1) p l,1 (1) ] is [k l,0 (1) k l,1 (1) ], k l,p (1) ∈{0,...,15}. All other coefficients are quantized according to the table in Figure 2 (amplitude coefficient indicator i 2,4,lMapping of elements in: Amplitude coefficient indicator element k l,i,f (2) from the amplitude coefficient p l,i,f (2) This table uses 8-level quantization with a mapping to p l (2) =[p l,0 (2) ... p l,M_v-1 (2) ], p l,f (2) =[p l,0,f (2) ... p l,2L-1.f (2) ] is k l,f (2) =[k l,0,f (2) ... k l,2L-1.f (2) ], k l,i,f (2) ∈{0,...,7}. [Phase Quantization] Amplitude Coefficient Indicator i 2,5,l Elements in (amplitude coefficient indicator elements) [c l,0 ...c l,M_v-1 ] is reported by the UE (using 4 bits). All phase coefficients are quantized using 16-PSK. The quantity φ for phase matching l,i,f = exp(j2πc l,i,f / 16) is the phase coefficient c l,f =[c l,0,f ...c l,2L-1.f ], c l,i,fi ∈{0,...,15}. Amplitude coefficient indicator element k, corresponding to the strongest coefficient of layer l l,floor(i_l^* / L) (1) = 15 (maximum value), and the amplitude coefficient indicator element k l,i_l^*,0 (2) = 7 (maximum value), and the phase coefficient indicator element c l,i_l^*,0 (2) = 0 (minimum value). For l = 1,...,v, k l,floor(i_l^* / L) (1) , k l,i_l^*,0 (2) , cl,i_l^*,0 (2) =0 is not reported. i 1,5 and i 1,6,l is the PMI index for (FD)DFT based reporting. Only if N3>19, i 1,5 is reported. 3000 to 2999+P CSI-RS The matrix W represented by the codebook for v (=1 to 4) layer CSI reporting using (v) is the following matrix W for layer l (=1 to v) l Based on. where beam index i=0,1,...,L-1,m1 (i) =O1n1 (i) +q1, m2 (i) =O2n2 (i) +q2, n1 (i) ∈{0,1,...,N1-1}, n2 (i) ∈{0,1,...,N2-1}. v m_1^(i),m_2^(i) denotes the SD(beam)-DFT basis, and p l,0 (1) , p l,i,f (2) denotes the amplitude coefficient, and φ l,i,f denotes a phase coefficient. Thus, the codebook for each layer includes the strongest coefficient for each polarization, the amplitude coefficient for each FD-DFT basis and SD-DFT basis for each polarization, and the phase coefficient for each FD-DFT basis and SD-DFT basis for each polarization. For CSI part 2 groupings, for a given CSI report, the PMI information is grouped into three groups (groups 0 to 2). This is important when CSI omission is performed. 2,4,l , i 2,5,l , i 1,7,l Each reported element of is associated with a specific priority rule. Groups 0 to 2 follow the following: Group 0: Index i 1,1 , i 1,2 , i 1,8,l (l=1,...,v) Group 1: Index i (if reported) 1,5 , index i (if reported) 1,6,l , i 1,7,l The highest (top) v2LM v -floor(K NZ / 2) priority elements, i 2,3,l , i 2,4,l The highest (upper) ceil(K NZ / 2)-v priority elements, i 2,5,l The highest (upper) ceil(K NZ / 2)-v priority elements (l=1,...,v) Group 2: i 1,7,l The lowest (lowest) floor(K NZ / 2) priority elements, i 2,4,l The lowest (lowest) floor(K NZ / 2) priority elements, i 2,5,l The lowest (lowest) floor(K NZ / 2) priority elements (l=1,...,v) In Type-1 CSI, an SD beam represented by an SD DFT vector is sent towards the UE. In Type-2 CSI, L SD beams are linearly combined and sent towards the UE. Each SD beam can be associated with multiple FD beams. For the corresponding SD beam, the channel frequency response can be obtained by linearly combining those FD basis vectors. The channel frequency response corresponds to the power delay profile. (Type 2 Port Selection Codebook / Extension / Further Extension) In Rel. 15 Type 2 port selection (PS) CSI (Type 2 PS codebook), the UE does not need to derive SD beams considering 2D-DFT as in Type 2 CSI. The base station transmits CSI-RS using K CSI-RS ports that are beamformed considering a set of SD beams. The UE selects / identifies the best L(≦K) CSI-RS ports per polarization and reports their indexes in W1. Rel. 15 Type 2 PS CSI supports rank 1, 2. The operation of Rel. 16 Type-2 PS CSI (enhanced Type-2 PS codebook) is similar to Rel. 16 Type-2 CSI, except for SD beam selection. Rel. 15 Type-2 PS CSI supports ranks 1 to 4. For layer l ∈ {1, 2, 3, 4}, the subband (SB)-wise precoder generation is given by: W l (N t ×N3) = QW1W ~ l W f,l H (Y2) Here, Q(N t ×K) denotes the K SD beams used for CSI-RS beamforming. W1(K×2L) is a block diagonal matrix. W ~ l (2L×M) is the LC coefficient matrix. W f,l (N3×M) consists of N3 FD-DFT basis vectors (FD basis vectors). K is set by the upper layer. L is set by the upper layer. P CSI-RS ∈{4,8,12,16,24,32}. P CSI-RS > 4, then L∈{2,3,4}. In the Type 2 PS CSI of Rel. 15 / 16, each CSI-RS port #i has an SD beam (b i ) (Figures 3A and 3B). The Rel. 16 Type 2 PS CSI increases the number of FD bases from N3 to M in the same way as the Rel. 16 Type 2 CSI. v By reducing it to (M v <<N3>>, which reduces overhead compared to Type 2 PS CSI in Rel. 15. In the Rel. 17 Type 2 port selection CSI / codebook (further enhanced Type 2 port selection codebook), each CSI-RS port #i is assigned to an SD-FD beam pair (SD beam b iand FD beam f i,j (j is the frequency index) (FIGS. 4A and 4B). In this example, ports 3 and 4 are associated with the same SD beam and different FD beams. The frequency selectivity of the channel frequency response observed at the UE based on a SD beam-FD beam pair can be reduced below the frequency selectivity of the channel frequency response observed at the UE based on a SD beam by delay pre-compensation. The main scenario of Type 2 port selection codebook in Rel. 17 is FDD. The channel reciprocity based on SRS measurement is not perfect (UL beam and DL beam angles may be different, UL and DL frequencies are different in FDD, and effective antenna spacing is different at the UL and DL frequencies). However, the base station can obtain / select some partial information (dominant angle and delay (SD and FD beam)). By using SRS measurement at the base station in addition to CSI report, the base station can obtain CSI for DL ​​MIMO precoder decision. In this case, some CSI reports may be omitted to reduce CSI overhead. In the Rel. 17 (further enhanced) Type 2 port selection codebook, the values ​​of α, M, β (parameter combination) are determined by the upper layer parameter paramCombination-r17 (codebook parameter setting). The precoding matrix indicated by the PMI is determined from L+M vectors, where L=K1 / 2 and K1=αP CSI-RS It is. In Rel. 17 Type-2 PS CSI, each CSI-RS port is beamformed with an SD beam and FD basis vectors, and each port is associated with an SD-FD pair. For a given layer l, information based on the following equation may be reported by the UE: W l (K×N3) = W1W ~ l W f,l H (Y3) For W1(K×2L), each matrix block consists of L columns of a K×K identity matrix. The base station transmits K beamformed CSI-RS ports. Each port is associated with an SD-FD pair. The UE selects L ports out of K and refers to them as PMI (W 1,l ) to the base station. In Rel. 16, each port is associated with an SD beam. W ~ l (2L×M v ) is a matrix of combination coefficients (subband complex LC coefficients). At most K0 NZCs are reported. The report consists of two parts: a bitmap capturing the NZC positions and the quantized NZCs. In certain cases the bitmap can be omitted. Note that in Rel. 16 the bitmap of NZC positions is always reported. W f,l (N3×M v ) is a matrix consisting of N3 FD basis (FD-DFT basis) vectors. v There are FD bases. The base station is f,l You can erase it. W f,l If is on, M v additional FD bases are reported. f,l When is off, no additional FD basis is reported. Note that in Rel. 16, W f,l is always reported. (JT) A joint transmission (JT) may refer to simultaneous data transmission from multiple points (eg, TRPs) to a single UE. Rel. 17 supports non-coherent joint transmission (NCJT) from two TRPs. The PDSCHs from the two TRPs may be precoded and decoded independently. The frequency resources may be non-overlapping, partially overlapping, or fully overlapping. When overlapping occurs, the PDSCH from one TRP will interfere with the PDSCH from the other TRP. In Rel. 18, it is considered to support coherent joint transmission (CJT) with up to four TRPs. Data from four TRPs may be coherently precoded and transmitted to the UE on the same time-frequency resource. For example, the same precoding matrix may be used considering the channels from four TRPs. Coherent may mean that there is a certain relationship between the phases of multiple received signals. With four TRP joint precoding, the signal quality may be improved and there may be no interference between the four TRPs. Data may only experience interference outside the four TRPs. (Rel.17 NCJT CSI) In Rel. 17, the applicable scenario for NCJT CSI reporting is single DCI-based MTRP NCJT with type 1 single panel codebook. For NCJT CSI measurement, two channel measurement resource (CMR) groups with each CMR from one TRP can be configured in a single CSI-ReportConfig. One CSI reporting mode can be configured from two modes. By RRC signaling, the CSI-ReportConfig for Rel. 17 non-coherent joint transmission (NCJT) CSI sets the CMR and the CSI reporting mode (csi-ReportMode). K sTwo CMR groups with K = K1 + K2 CMRs are configured in the UE. s ≦8. s The CMRs correspond to NZP-CSI-RS resource sets for channel measurement. K1 and K2 are the numbers of CMRs in the two CMR groups, respectively. N CMR pairs (N sets) are configured by higher layers by selecting from all possible pairs. N=1, K s =2 is supported. max Support for K = 2 is an optional feature for the UE. S,max Support for =X is an optional feature in the UE. Each CMR can contain up to 32 CSI-RS ports, depending on the UE capabilities. Each CMR pair is associated with one CRI value. The bitmap by RRC signaling indicates N (N=1,2) CMR pairs actually used for NCJT measurement by indicating one CMR from each CMR group. The UE measures single-TRP CSI for TRP1 and single-TRP CSI for TRP2 using CMRs in the two CMR groups, and measures NCJT CSI using N CMR pairs. The UE selects one or more CSIs to report based on the mode configured by csi-ReportMode, which indicates one of the following two modes: Mode 1 and Mode 2. At least one of the following modes 1 and 2 is supported. [Mode 1] The UE may be configured to report X CSIs associated to single-TRP measurement hypotheses and one CSI associated to an NCJT measurement hypothesis, where X=0,1,2. If X=2, two CSIs are associated to two different single-TRP measurement hypotheses with CMRs from different CMR groups. Support for X=1,2 is an optional UE feature for UEs supporting option 1. [Mode 2] The UE is configured to report one CSI associated with the best one of the measurement assumptions of NCJT and single TRP. In Mode 1, the UE reports a total of X+1 CSIs, including X (X=0,1,2) single-TRP CSIs and one NCJT CSI. In Mode 2, the UE reports one best CSI (one CSI) from all single-TRP CSIs and one NCJT CSI. Within one CSI report, up to two single-TRP CSIs and one NCJT CSI can be reported (mode 1 with X=2). The NCJT CSI includes one CRI, two RIs (with one joint RI index), two PMIs, two LIs, and one CQI (up to 4 layers). The single-TRP CSI is the same as the existing CSI, including one CRI, one RI / PMI / LI, and one or two CQIs (up to 8 layers, one CQI per CW). New mapping orders (tables) of multiple fields within one CSI report are defined for some of the following cases: Mapping order of Wideband CSI for Mode 1 with X=0. Wideband CSI is supported only for Mode 1 with X=0, i.e., NCJT CSI. CSI Part 1 mapping order for modes 1 and 2. CSI Part 2 wideband mapping order for modes 1 and 2. CSI Part 2 subband mapping order for modes 1 and 2. (CJT) In Rel. 18, support for coherent joint transmission (CJT, mTRP CJT) with up to four TRPs is being considered. Data from four TRPs may be coherently precoded and transmitted to the UE on the same time-frequency resource. For example, the same precoding matrix may be used considering channels from four TRPs. Coherent may mean that there is a certain relationship between the phases of multiple received signals. With four TRP joint precoding, signal quality may be improved and there may be no interference between the four TRPs. Data may only experience interference outside the four TRPs. In the ideal case (where the four TRPs are collocated), a joint estimation of the aggregated channel matrix H can be performed and a joint precoding matrix V can be fed back. However, the large-scale path losses of the four paths may differ significantly. The joint precoding matrix V based on a constant module codebook is not accurate. In this case, the feedback per TRP and the inter-TRP coefficients can be aligned with the current NR type-2 codebook. For a CJT of up to four TRPs in FR1, the selection of the four TRPs may be semi-static, and thus the selection and configuration of the four CMRs (four CSI-RS resources) for channel measurement may also be semi-static. Dynamic indication of the four TRPs from a list of CSI-RS resources is also possible, but unlikely. The path losses from the four TRPs to the UE are different, so it is difficult to simply report one aggregated CSI that represents the joint channel matrix. Considering fallback operation to NCJT (i.e., single-TRP), per-TRP CSI (i.e., single-TRP CSI like NCJT CSI in Rel. 17) is also considered. (CJT CSI) Assuming ideal backhaul, synchronization, and the same number of antenna ports across multiple TRPs, CSI acquisition for coherent joint transmission (CJT) for FR1 and up to four TRPs is considered. For CJT multi-TRP for FDD, an improvement of the Rel. 16 / 17 type-2 codebook is considered. The following are being considered as CSI extensions for CJT: - CMR and IMR for measurement of up to four TRPs. Per-TRP CSI with inter-TRP CSI feedback for x-TRP CJT. Inter-TRP CSI: Novel feedback and codebook for inter-TRP phase matrix / inter-TRP amplitude matrix / inter-TRP matrix (including both amplitude and phase). • Additional reportable x-TRP CJT CQI. The following is being considered as a multi-TRP CJT CSI: Setting restrictions on CMR / CSI for each TRP. Inter-TRP CSI / PMI (e.g. inter-TRP phase with / without inter-TRP amplitude). [Option 1] In addition to the Rel. 16 / 17 Type 2 codebook, an independent codebook and feedback. [Option 2] W l ~ W f,l H W2 of CSI / PMI between TRPs conveyed with / within. Common / different FD basis for multiple TRPs. The following is being considered as a multi-panel Type 2 CSI for multi-TRP CJT: - Extension of Type 2 codebook and Type 2 PS codebook to multi-panel in Rel. 16 / 17. New antenna configuration for Type 2 multi-panel codebook. W1 (SD basis) / W for each TRP f(FD basis) may be the same or different. l (NZC) may be different. W1 / W for each TRP f / W l may be selected jointly or individually. W1 / W f / W l Different scenarios with different options for the design of W are preferable. φ may be reported as separate items or l These used policies relate to deployment scenarios (e.g., intra-site multi-TRP or inter-site multi-TRP). For example, the precoding matrix for a 4-TRP CJT CSI (codebook) is W1 / W f / W l W1 for each TRP may be the same or different, and may be selected jointly or individually. W1 for each TRP may be the same or different, and may be selected jointly or individually. l may be different and may be selected jointly or individually. f may be the same or different and may be selected jointly or individually. In the (Rel.18) Type 2 codebook (codebook structure) for CJT multi-TRP (mTRP), at least one of the following modes (codebook modes) may be supported: [Mode 1] SD / FD basis selection per TRP / TRP group. It allows independent FD basis selection across N TRPs / TRP groups. For example, the codebook structure is given by: where N is the number of TRPs or TRP groups. [Mode 2] SD basis selection per TRP / TRP group (port group or resource) and joint / common FD basis selection (across N TRPs / TRP groups). For example, the codebook structure is given by: where N is the number of TRPs or TRP groups. In these two modes, detailed designs such as parameter combination, basis selection, TRP (group) selection, reference amplitude, and W2 quantization scheme may be shared. In an improvement of the Type-2 codebook, it is considered that the selection of N CSI-RS resources is made by the UE and reported as part of the CSI report, where N ∈ {1,...,N TRP}, where N is the number of cooperating CSI-RS resources. TRP N is the maximum number of cooperating CSI-RS resources, which is set by the base station via higher layer signaling. TRP The selection of N from the N CSI-RS resources is TRP For example, if four TRPs are configured and the UE selects the first and third TRPs, the UE will report the selection via a bitmap of

[1010] You may report N=N TRP The configuration of the limit of N may be supported and configured by the base station via higher layer signaling. For example, if four TRPs are configured, the UE may report CJT CSI assuming a 4-TRP CJT. If the limit is configured, N TRP A bitmap of bits may not be reported: only one transmission hypothesis is reported and the UE is not required to calculate CSI for multiple transmission hypotheses. In improving the type 2 codebook for CJT mTRP, TRP For the setting value of SD basis selection (SD basis vector selection, number of SD basis vectors, number of beams L), multiple values ​​(N TRP Individual values ​​L i Combinations of {L1,...,LN_TRP}, i=1,...,N TRP , L i corresponds to TRP#i) L It is considered that a set (list, candidates) of combinations is configured by the base station via higher layer (RRC) signaling. L If >1, the set N L A set of multiple values ​​{L1,...,L N_TRP} combinations are reported in CSI Part 1 using indicators. L = 1 is the number of N supported by the UE L According to the existing design, the SD basis selection for the nth (n=1,...,N) selected CSI-RS resource is CSI-RS / 2,L n ) code points, where P CSI-RS =2*N1N2. L n The multiple possible values ​​supported for each of the parameters include the existing multiple possible values, i.e., L's possible values ​​{2, 4, 6} in the Rel. 16 refinement. In the Rel. 17 refinement, the base station supports multiple possible values ​​for {α1,...,α N_TRP}, L n = α n P CSI-RS / 2, α n =N for {1 / 2,3 / 4,1} L According to an existing design, for all the selected N CSI-RS resources, the SD basis oversampling group for each CSI-RS resource is indicated in CSI Part 2 using an indicator selected from a set of O1O2 codepoints. However, N TRPThe relationship between the bitmap of bits and the indicator for a combination corresponding to one or more TRPs is not clear. Also, it is not clear whether the value of L is 0. If such operations are not clear, it may lead to a decrease in throughput / communication quality, etc. Therefore, the inventors conceived a method for reporting the SD basis in mTRP CJT CSI. Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Each of the following embodiments (e.g., each case) may be used alone or in combination of at least two of them. In the present disclosure, "A / B" and "at least one of A and B" may be interpreted as interchangeable. Also, in the present disclosure, "A / B / C" may mean "at least one of A, B, and C." In the present disclosure, terms such as activate, deactivate, indicate, select, configure, update, and determine may be interchangeable. In the present disclosure, terms such as support, control, controllable, operate, and operate may be interchangeable. In the present disclosure, Radio Resource Control (RRC), RRC parameters, RRC messages, higher layer parameters, information elements (IEs), settings, etc. may be interchangeable. In the present disclosure, Medium Access Control (MAC) control elements (CE), update commands, activation / deactivation commands, etc. may be interchangeable. In the present disclosure, higher layer signaling may be, for example, any one or a combination of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, and the like. In the present disclosure, the MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc. The broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc. In the present disclosure, the physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and the like. In this disclosure, the terms index, identifier (ID), indicator, resource ID, etc. may be interchangeable. In this disclosure, the terms sequence, list, set, group, cluster, subset, etc. may be interchangeable. In the present disclosure, the terms panel, panel group, beam, beam group, precoder, Uplink (UL) transmitting entity, Transmission / Reception Point (TRP), base station, Spatial Relation Information (SRI), spatial relation, SRS Resource Indicator (SRI), Control Resource Set (CONTROLLER RESOLUTION SET (CORESET)), Physical Downlink Shared Channel (PDSCH), Codeword (CW), Transport Block (TB), Reference Signal (RS), antenna port (e.g., DeModulation Reference Signal (DMRS) port), antenna port group (e.g., DMRS port group), group (e.g., spatial relation group, Code Division Multiplexing (CDM) group, reference signal group, CORESET group, Physical Uplink Control The terms PUCCH group, PUCCH resource group), resource (e.g., reference signal resource, SRS resource), resource set (e.g., reference signal resource set), CORESET pool, downlink Transmission Configuration Indication state (TCI state) (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, common TCI state, Quasi-Co-Location (QCL), QCL assumption, etc. may be read as interchangeable. In this disclosure, "having the capability of..." may be read interchangeably as "supporting / reporting the capability of...". In this disclosure, b c, a_b^c, may be read as interchangeable. b , a_b, may be read as interchangeable. c , a^c may be read as one another. In the present disclosure, ceil(x), a ceiling function, and a ceiling function may be read as one another. In the present disclosure, floor(x), a floor function, and a floor function may be read as one another. In the present disclosure, the terms "basis", "DFT basis", "basis vector", and "DFT basis vector" may be interchanged. In the present disclosure, the terms "SD basis", "SD-DFT basis", "beam", "SD beam", "SD vector", "SD 2D-DFT vector", and "SD basis vector" may be interchanged. In the present disclosure, the terms "L", "number of SD beams", "number of beams", and "number of SD 2D-DFT vectors" may be interchanged. In the present disclosure, the terms "FD basis", "FD-DFT basis", "f i , FD beam, FD vector, FD basis vector, and FD-DFT basis vector may be interpreted as interchangeable. In the present disclosure, coupling coefficient, LC coefficient, subband complex LC coefficient, coupling coefficient matrix may be read as mutually interchangeable. In the present disclosure, co-phasing, phase matching, phase compensation, phase adjustment, phase difference, phase relationship, phase coupling, phase may be read as mutually interchangeable. In the present disclosure, difference and relative may be read as mutually interchangeable. In the present disclosure, amplitude and amplitude coefficient may be read as mutually interchangeable. In the present disclosure, phase and phase coefficient may be read as mutually interchangeable. In the present disclosure, strongest coefficient, strongest amplitude coefficient, strongest amplitude may be read as mutually interchangeable. In the present disclosure, quantization table and quantization method may be read as mutually interchangeable. In the present disclosure, size, length, and number may be interpreted as interchangeable. In the present disclosure, CJT, mTRP CJT, and CJT mTRP may be read as interchangeable. (Wireless communication method) In each embodiment, the TRP, CMR, NZP-CSI-RS resource, and CRI may be interchangeable. In each embodiment, the group / set of the TRP, the group / set of the CMR, the group / set of the NZP-CSI-RS resource, and the group / set of the CRI may be interchangeable. In each embodiment, the number of TRPs for the CJT, N, TRP , X, N g In each embodiment, X TRPs, X-TRPs, X panels, N g In each embodiment, a CJT using X TRPs, a CJT using X panels, and an X-TRP CJT may be interchangeable. In each embodiment, the reference CSI, the CSI for the reference TRP, and the first reported CSI may be read as mutually interchangeable. In each embodiment, the reference TRP, the CSI corresponding to the reference CSI, the TRP corresponding to the first reported CSI, and the CSI-RS resource / CMR / CMR group / CSI-RS resource set corresponding to the first reported CSI may be read as mutually interchangeable. In each embodiment, the TRP, the CSI-RS resource, the CMR, the CMR group, and the CSI-RS resource set may be read as mutually interchangeable. In each embodiment, multi-TRP, multi-panel, intra-site multi-TRP, and inter-site multi-TRP may be read as interchangeable. In each embodiment, inter-TRP, inter-panel, inter-TRP difference, and inter-TRP comparison may be read as interchangeable. In each embodiment, inter-TRP CSI, inter-TRP CJT CSI, inter-panel CSI, CSI of another TRP relative to CSI of the reference TRP, CSI of another TRP relative to CSI of the reference panel, may be read as interchangeable. In each embodiment, per-TRP CSI and per-panel CSI may be read as interchangeable. In each embodiment, the inter-TRP phase index and the inter-TRP phasing index may be replaced with each other. In each embodiment, the inter-TRP index and the inter-TRP coefficient index may be replaced with each other. In each embodiment, the inter-TRP phase matrix and the inter-TRP phasing matrix may be replaced with each other. In each embodiment, the inter-TRP matrix and the inter-TRP coefficient matrix may be replaced with each other. In each embodiment, the inter-TRP phase codebook and the inter-TRP phasing codebook may be replaced with each other. In each embodiment, the inter-TRP codebook and the inter-TRP coefficient codebook may be replaced with each other. In each embodiment, the CSI reporting / content may apply to subband reporting or wideband reporting. In the example of CSI in the figures of each embodiment, the CSI for X TRPs may include the CSI of the 1st TRP to the CSI of the Xth TRP. The CSI of the i-th TRP in the figures of each embodiment is 2L i Row (SD beam) and M i The matrix of columns (FD basis) indicates the number / position of NZC. M i may be a value M common to the X TRPs, or may be a value separate for each TRP. Figure 5 shows an example of parameter combinations for a Rel. 16 type 2 codebook, and Figure 6 shows an example of parameter combinations for a Rel. 17 type 2 port selection codebook. In each embodiment, a parameter L for SD basis / SD basis vector, the number of beams L, a codebook parameter α, a codebook parameter setting, a parameter combination, a parameter related to the number of SD basis vectors, one or more parameters related to the number of SD basis vectors for multiple transmission points, L, L for TRP#i (i=1, 2, ...),i , LL common to multiple TRPs, LL spanning multiple TRPs tot , a plurality of parameters LL corresponding to a plurality of TRPs #i, i , may be read as interchangeable. <Problem #B2> Interpretation #1 (NZC parameter 1) of "same β for all TRPs" (NZC parameter a) is that the same β is set for each TRP, and the maximum number of NZCs for each layer or all layers is considered per TRP. For example, if β=1 / 2, then for each TRP, up to 50% of the number of NZCs can be reported for one layer per TRP. Interpretation #2 of "same β for all TRPs" (NZC parameter a) may be that one set β is applied to all TRPs to limit the total number of NZCs for all TRPs. One set β may be applied to all TRPs regardless of the maximum number of NZCs per TRP. A maximum number of total NZCs for each layer for all TRPs (regardless of per-TRP limitations) may be considered. A maximum number of total NZCs for all layers for all TRPs (regardless of per-TRP restrictions) may be considered. In the (Rel. 16) Extended Type 2 Codebook or (Rel. 17) Extended Type 2 Port Selection Codebook, a bitmap is used to indicate the NZC in W2. In the bitmap, there is at least one '1'. In CJT CSI Rel. 18 and later, considering the codebook structure of CJT CSI mentioned above, W2 is selected jointly for multiple TRPs. In the bitmap for NZC, it is not clear whether it is allowed that no NZC is selected / reported for a certain TRP. <Embodiment #B2> This embodiment relates to problem #B2. The UE may follow one of several options: Option 1 It is not allowed that no NZC is selected / reported for one TRP. At least one NZC is selected / reported per TRP. The minimum number of NZCs selected / reported for one TRP may be 1. There may be at least one '1' in the bitmap indicating NZC per TRP. The signaling may be a separate bitmap for each TRP or one combined bitmap for multiple TRPs. Option 2 It is permitted that no NZCs are selected / reported for a TRP. The minimum number of NZCs selected / reported for a TRP may be 0. In the examples of Figures 7 and 8, the number of FD bases for four TRPs, M i The common value M = 4, the number of SD beams for the first TRP is 2L1 = 8, and the number of SD beams for the other TRPs is 2L2 = 2L3 = 2L4 = 4. Therefore, the number of coefficients for the first TRP on a layer is 2L1 * M = 32, and the number of coefficients for the other TRPs on that layer is 2L2 * M = 2L3 * M = 2L4 * M = 16. In this example, the number of FD bases M i is a common value for X TRPs, but may be a separate value for each TRP. β=1 / 2 limits the maximum number of NZCs that will be reported for each TRP. The number of NZCs actually reported may be less than the maximum number of NZCs. In the example of Fig. 7, interpretation #1 and β=1 / 2 are used, and NZC is not selected / reported in the 4th TRP CSI. In the example of Fig. 8, interpretation #2 and β=1 / 4 are used, and NZC is not selected / reported in the 3rd TRP CSI. In option 1, at least one of the examples of Fig. 7 and Fig. 8 may not be allowed. In option 2, at least one of the examples of Fig. 7 and Fig. 8 may be allowed. A special case may be allowed where all NZCs selected / reported are derived from one and the same TRP. If no NZC is selected / reported for a TRP, the bitmap indicating the NZC for that TRP may be omitted in the report, which can reduce reporting overhead. To ensure that the UE and the base station have a common understanding regarding which TRPs the bitmaps are omitted, the UE / base station may follow at least one of the following options: [Option 2-1] In CSI Part 1 with fixed size, the number of actual (reported) NZCs for each TRP is reported. For example, if the number of NZCs for four TRPs is reported as [8,2,3,0], in CSI Part 2 with variable size, there may be no bitmap and NZC for the fourth TRP. [Option 2-2] In the CSI Part 1, which has a fixed size, the total number of actual (reported) NZCs for all TRPs is reported. One or more additional bits (bitmap) may be used to indicate whether each TRP has an NZC or not. For example, if 13 is reported as the total number of NZCs, an additional bitmap 1110 may be used to indicate whether each TRP has an NZC or not. A value of '0' therein may mean that the 4th TRP does not have an NZC. Bit position i in the bitmap may correspond to the i-th TRP. A UE capability for supporting omitting TRP-specific NZC bitmaps may be introduced. For example, reporting using option 2 of the aforementioned CJT CSI may be configured only if that option is supported and the corresponding UE capability is reported. RRC configurations indicating either option 1 and 2 of this embodiment may be supported / implemented. The maximum number of TRPs to which bitmap omission can be applied may be limited, e.g., bitmap / NAC reporting for up to one TRP may be omitted. According to this embodiment, the UE can properly report the NZC for each TRP. <Embodiment #B3> This embodiment relates to option 2 of embodiment #B2. If no NZC is selected / reported for a TRP, it is not clear whether the SD basis for that TRP needs to be reported (assuming that the NW configures the UE to report CJT CSI for N TRPs). The UE may follow one of several options: [Option 3-1] If no NZC is selected / reported for a TRP, the SD basis for that TRP is reported in W1. In this case, the UE may maintain the CJT CSI reporting of N TRPs as configured. [Option 3-2] If no NZC is selected / reported for a TRP, the SD basis for that TRP is omitted and not reported. If option 2-1 / 2-2 in embodiment #B2 is applied and bitmap and NZC reporting for a TRP is not indicated, the UE may not report the CRI index or TRP index, and may not report the SD basis index for that TRP, which can further reduce the overhead of CSI reporting. A UE capability regarding whether to support omission of the TRP-specific SD basis may be introduced. For example, option 3-2 may be supported and configured only if the corresponding UE capability is reported. The UE may report CJT CSI for (N-1), (N-2), ... TRPs. RRC configurations between options 3-1 and 3-2 may be supported. The number of TRPs to which the omission of option 3-2 applies may be limited to a maximum number, for example, the bitmap and NZC of up to one TRP may be omitted. According to this embodiment, even if no NZC is selected / reported for a certain TRP, the UE can properly report the CJT CSI. <Embodiment #C1> This embodiment relates to a setting regarding the number of SD basis vectors. The number of SD basis vectors may be set by a parameter in paramCombination (e.g., paramCombination-rX, where X may be 18 or more). For example, the parameter may be LL or other parameters. The setting of the number of SD basis vectors may follow at least one of the following options / variations: Option 1 To set a different number of SD basis vectors for each TRP / TRP group, either of the following options 1a and 1b are used. [Option 1a] A separate paramCombination is set for each TRP / TRP group. Different values ​​of the parameter combination (paramCombination) may be set for each TRP / TRP group. [Option 1b] A separate LL is set for each TRP / TRP group. A different value of LL may be set for each TRP / TRP group. Parameters other than LL in paramCombination may be values ​​for each TRP, may be values ​​common to multiple TRPs, may be values ​​for each TRP group, or may be values ​​common to multiple TRP groups. Option 2 To set the same number of SD basis vectors for all TRPs / TRP groups, either of the following options 2a and 2b is used. [Option 2a] A common paramCombination is set for all TRPs / TRP groups. [Option 2b] A common LL is set for all TRPs / TRP groups. For example, a common LL may be set for TRPs #1 / #2 / #3 / #4. In the paramCombination, parameters other than the LL may be values ​​for each TRP, may be values ​​common to multiple TRPs, may be values ​​for each TRP group, or may be values ​​common to multiple TRP groups. Option 3 Via paramCombination or LL, the total number of SD basis vectors for all TRPs / TRP groups is set. Option 3 may be combined with option 1 / 2, where the number of SD basis vectors configured in option 1 / 2 is the maximum number of SD basis vectors instead of the actual number of SD basis vectors in the report. For example, when the UE determines the actual number of SD basis vectors per TRP, the UE may consider the value configured by option 1 / 2 to be the maximum number limit per TRP / TRP group. Variations For example, different options may be set / used for different codebook modes. According to this embodiment, the UE can appropriately configure the number of SD basis vectors. <Embodiment #C2> This embodiment relates to the selection of SD basis vectors by the UE. In this embodiment, the number to be set may be indicated by the setting for the number of SD basis vectors in embodiment #C1. The UE may follow at least one of the following options / variations: Option 1 The UE uses a number LL configured for selecting and reporting SD basis vectors for each TRP#i. i Follow. This option may be applied to option 1 / 2 of embodiment #C1. For example, if LL1=4, LL2=2, LL3=1, and LL4=1, the UE may report four SD basis vectors for TRP#1, two SD basis vectors for TRP#2, one SD basis vector for TRP#3, and one SD basis vector for TRP#4. This option may require the following extensions to option 3 of embodiment #C1. [Extended] The UE needs to determine the number of SD basis vectors selected for each TRP / TRP group. The UE may further report the number of SD basis vectors selected for each TRP / TRP group, or may report the association between each SD basis vector and the ID of one TRP / TRP group. For example, if LL=6 (the total number of SD basis vectors for all TRPs), the UE may report the number of SD basis vectors for TRP#1, 2 for TRP#2, 1 for TRP#3, and 1 for TRP#4. Option 2 The configured number is the maximum number of SD basis vectors LL, and the UE may select / report up to LL SD basis vectors. The UE may need to determine the number of SD basis vectors selected per TRP / TRP group. The UE may further report the number of SD basis vectors selected per TRP / TRP group, or may report the total number of SD basis vectors selected and report the association between each SD basis vector and the ID of one TRP / TRP group. Such configuration (e.g., setting the maximum number of SD basis vectors) may be enabled by a new RRC parameter. The UE may follow either of options 2a and 2b below. [Option 2a] Even if the UE selects fewer SD basis vectors than the configured LL, the UE may ensure that at least one SD basis vector is reported per TRP / TRP group. A new RRC parameter may be configured to enable this option. In this case, the LL for one TRP#i may be set. i If =1 is set, the UE may not need to report the number of SD basis vectors selected for that TRP#i. [Option 2b] The UE may determine that there are no SD basis vectors reported for a certain TRP / TRP group (the number of reported SD basis vectors is zero). New RRC parameters may be configured to enable this option. FIG. 9 shows an example of a combination of embodiment #C1 and embodiment #C2 for four TRPs #1, #2, #3, and #4. i is the number of SD basis vectors set for TRP#i. i,rep is the number of SD basis vectors reported for TRP#i. LL is the total number of SD basis vectors set for all TRPs. rep is the total number of SD basis vectors reported for all TRPs. For the combination of option 1 / 2 of embodiment #C1 and option 2a of embodiment #C2, if LL1=4, LL2=2, LL3=1, and LL4=1, the UE 1,rep =2, LL 2,rep =2, LL 3,rep =1, LL 4,rep For a combination of option 1 / 2 in embodiment #C1 and option 2b in embodiment #C2, if LL1=4, LL2=2, LL3=1, and LL4=1, the UE may report LL 1,rep =2, LL 2,rep =2, LL 3,rep =0, LL 4,rep For the combination of option 3 of embodiment #C1 and option 2a of embodiment #C2, when LL=6, the number of SD basis vectors reported for each TRP is 1 or more, so LLrep is equal to or greater than 4 TRPs. In this case, the UE rep = 5 and LL 1,rep =2, LL 2,rep =1, LL 3,rep =1, LL 4,rep For the combination of option 3 of embodiment #C1 and option 2b of embodiment #C2, if LL=6, the UE may report LL rep = 3 and LL 1,rep =2, LL 2,rep =1, LL 3,rep =0, LL 4,rep =0 may be reported. Variations For example, different options / options may be set / used for different codebook modes. According to this embodiment, the UE can appropriately determine / report the number of SD basis vectors. <Embodiment #D1> If reporting of SD basis / SD basis vectors is supported / configured, the base station shall i If the selection and reporting of SD basis / SD basis vectors is supported / configured, the base station may select and report one of the one or more candidate values ​​of LL for all TRPs. tot One or more candidate values ​​of , may be set, and the UE may select and report one of the one or more candidate values. In embodiment #C1 / #C2, LL i If LL=4 is set, i means the maximum value, and the UE 1,report In embodiment #D1, the base station can set candidate values ​​LL1={2,4}, and the UE can select and report LL 1,report ={2,4} or {0,2,4} can be reported. Whether or not selection and reporting of zero SD bases is permitted may be related to the TRP selection setting in embodiments #B2 / #B3 / #C1 / #C2. The setting may be independent of the LL setting. LL for each TRP ii UE capability for the maximum of LL for each TRP i i UE capabilities for candidate values ​​of and LL across multiple TRPs tot UE capability for maximum number of TRPs and LL across multiple TRPs tot At least one of: UE capability for candidate values ​​of , and . According to this embodiment, the UE can select / report an appropriate value for LL. <Embodiment #D2> The index of the SD basis vector for each TRP i is ceil(log2(C(N1N2,LL i,report ))) bits, the size of which may be reported by LL selected from N1N2 vectors. i,report vector, the index of which may be signaled in CSI Part 2. For each TRP i, its size (number of bits) is LL i,report In this case, LL i,report It is unclear how this will be reported and what its size will be. The following embodiment #D2-1 or #D2-2 may be applied to the above-described selection method 2. -Embodiment #D2-1 LL for each TRP i i,report may be reported in CSI Part 1. i,report may have a fixed size. --Option 1 LL for each TRP i i,report The size of LL for each TRP i i The maximum value set for LL i,max It may be determined by: LL i,report is ceil(log2(LL i,max )) bit. i,max If LL=4 is set, i = {1,2,3,4}. TRP selection is N TRPFor a TRP reported as 0 (not selected), the reported LL i The value may be omitted by the NW, but in order for the base station and the UE to have a common understanding of the size of CSI Part 1, LL i It is preferred that the size of the report of the value be occupied within the CSI report. LL i,report is ceil(log2(1+LL i,max )) bit. i,max If LL=4 is set, i 3 bits may be needed to indicate N = {0,1,2,3,4} to indicate TRP selection. TRP A bitmap of bits may not be required. --Option 2 LL for each TRP i i,report The size of LL for each TRP i i Number of candidate values ​​of CandNo i It may be determined by: LL i,report is ceil(log2(CandNo i )) bit. Two possible values ​​LL i If ={2,4} is set, CandNo i = 2, and LL i = {2,4}. The TRP selection is N TRP For a TRP reported as 0 (not selected), the reported LL i The value may be omitted by the NW, but in order for the base station and the UE to have a common understanding of the size of CSI Part 1, LL i It is preferred that the size of the report of the value be occupied within the CSI report. LL i,report is ceil(log2(1+CandNo i )) bit. Two possible values ​​LL i If ={2,4} is set, CandNo i= 2, and LL i = {0,2,4}. Two bits may be needed to indicate the TRP selection. TRP A bitmap of bits may not be required. -Embodiment #D2-2 LL for each TRP i i,report may be reported in a new CSI part (e.g., CSI Part 1.5), which may come after CSI Part 1 and before CSI Part 2. i,report The size of LL may be determined by what is reported in CSI Part 1. i,report The reported value of may determine the size of CSI Part 2. --Option 3 LL for selected TRP i i,report The size of LL for each TRP i i The maximum value set for LL i,max It may be determined by: LL i,report is ceil(log2(LL i,max )) bit. i,max If =4 is set, LL i = {1,2,3,4}. N for TRP selection TRP For TRPs reported as 0 (not selected) by the bitmap, the UE shall i,report LL for unselected TRPs is not required. i,report For example, for a selected TRP i, the size of LL i,max If LL=4 is set, i = {1,2,3,4}. Two bits may be needed to represent --Option 4 LL for selected TRP i i,report The size of LL for each TRP i i Number of candidate values ​​of CandNo i It may be determined by: LL i,reportis ceil(log2(CandNo i )) bits for TRP selection. TRP For TRPs reported as 0 (not selected) by the bitmap, the UE shall i,report LL for unselected TRPs is not required. i,report For example, for a selected TRP i, there are two candidate values ​​LL i If ={2,4} is set, CandNo i = 2, and LL i ={2,4}. One bit may be needed to indicate --Option 5 L tot =Σ n=1 N L n Because of the constraints of L tot When becomes smaller, LL i,report The number of possible combinations of L becomes smaller. In mathematical terms, it is tot into X groups, where X may be the number of selected TRPs. Therefore, ceil(log2(C(L tot ,(X-1)))) bits by LL i,report The combination of LL for the selected TRP i can be shown. i,report The size of is min{ ceil(log2(C(L tot ,(X-1)))), ceil(log2(LL i,max ))} bits. --Option 6 For the same reasons as in option 5, the LL for the selected TRP i i,report The size of is min{ ceil(log2(C(L tot ,(X-1)))), ceil(log2(CandNo i ))} bits. For the above selection method 3 / 4, the above options 1 / 2 / 3 / 4 / 5 / 6 may be applied. When option 5 / 6 is applied, the total number of SD basis vectors selected for all TRPs, Ltot,report is preferably reported by the UE in CSI Part 1. The maximum number of total SD basis vectors for all TRPs L total,max,configured is set, and L tot,report The size of the maximum number L total,max,configured For example, L tot,report The size of is ceil(log2(L total,max,configured For option 5, L tot,report The size of is min{ ceil(log2(C(L tot,report ,(X-1)))), ceil(log2(LL i,max For option 6, L tot,report The size of is min{ ceil(log2(C(L tot,report ,(X-1)))), ceil(log2(LL i,max ))} bits. RRC signaling / UE capabilities for embodiments #D2-1 / #D2-2 / options 1 / 2 / 3 / 4 / 5 / 6 may be introduced. The UE may start decoding CSI Part 1.5 after completing decoding of CSI Part 1. To enable embodiment #D2-2 (CSI Part 1.5), it is preferable that it is coded (polar coded) separately from CSI Part 1 or CSI Part 2 and mapped onto REs separate from CSI Part 1 or CSI Part 2. The RE to which CSI Part 1.5 is mapped may be at least one of REs 1 to 4 below. [RE1] Part of existing CSI Part 2. In this case, it does not affect the decoding of UL-SCH (PUSCH) / CSI Part 1, but affects only the decoding of CSI Part 2. As in the example of Fig. 10A, CSI Part 1.5 and new CSI Part 2 may be mapped to the RE for existing CSI Part 2. [RE2] Part of existing CSI Part 1. In this case, it does not affect the decoding of UL-SCH (PUSCH) / CSI Part 2, but affects only the decoding of CSI Part 1. As in the example of Fig. 10B, new CSI Part 1 and CSI Part 1.5 may be mapped to the RE for existing CSI Part 1. [RE3] Part of the existing UL-SCH. In this case, it does not affect the decoding of CSI Part 1 / CSI Part 2, but affects only the decoding of UL-SCH (PUSCH). As in the example of FIG. 10C, CSI Part 1.5 may be mapped to REs other than the REs for existing CSI Part 1 and existing CSI Part 2 in the existing UL-SCH. [RE4] Part of existing CSI Part 1 / 2. New RE mapping for CSI Part 1 / 1.5 / 2 may be introduced. In this case, it does not affect the decoding of UL-SCH (PUSCH). As in the example of FIG. 10D, when CSI Part 1.5 is reported, new CSI Part 1, CSI Part 1.5, and new CSI Part 2 may be mapped to the REs for existing CSI Part 1 and existing CSI Part 2. If the RE mapping in the time domain is in the order of CSI parts 1, 1.5, 2, the base station can start decoding each CSI part earlier. The base station may start decoding multiple CSI parts at the same symbol. According to this embodiment, the UE can properly report SD basis vectors corresponding to multiple TRPs. <Embodiment #1> NW is N TRP A plurality of values ​​{L1,...,L N_TRP}N L When setting up a set of combinations, L i = 0 is L i For example, L i The candidate values ​​of L i ={2,4,6} or L i = {1,2,4,6} or L i = {2,4} or other values. For example, NW is the number of N for four TRPs. L= 4 combinations may be set. Each combination is TRP = 4 L i N L The combination of N = 4 can be [6,4,2,2], [4,2,2,2], [4,4,2,2], [4,4,4,2] or other values. L may be other values ​​subject to UE capabilities with respect to the maximum value, for example the maximum may be {1,2,4,8} or other values. N TRP A bitmap of bits may be reported along with an indicator for the combination in CSI Part 1. The contents of these two may determine the number of SD basis vectors for each TRP. N TRP If the bitmap of a bit indicates that a TRP is not selected, the corresponding value in the combination for that TRP may be considered as 0. For example, TRP If the bitmap of the bits is

[1010] and the reported combination is the second combination [4,2,2,2] mentioned above, it may mean that the number of SD basis vectors for the four TRPs is [4,0,2,0] (Figure 11). In this case, in CSI Part 2, the UE may be required to report only the SD basis vectors for the first and third TRPs. This means that L i This may mean that =0 is not a candidate value for setting (even if it is not set), but may implicitly be a candidate value for reporting. According to this embodiment, the UE can appropriately report the selected TRP and the value for the number of SD basis vectors per TRP. <Embodiment #2> NW is N TRP For each TRP, {L1,...,L N_TRP Multi-value N in} L When setting up a set of combinations, L i = 0 is L i For example, L iThe candidate values ​​of L i = {0,2,4,6}, or L i = {0,1,2,4,6}, or L i = {0, 2, 4} or other values. For example, NW is the number of N for four TRPs. L = 6 combinations may be set. Each combination is TRP = 4 L i N L The combinations of N = 4 can be [6,4,2,2], [4,2,2,0], [4,4,2,2], [4,4,4,2], [4,0,2,2], [4,4,0,0] or other values. L may be other values ​​subject to UE capabilities with respect to the maximum value, for example the maximum may be {1,2,4,8} or other values. N L If N = 1, it means that the NW configures only one combination, and the UE does not need to report the combination. However, in this case, N TRP Regarding whether the bitmap of bits is reported, the following options 1 or 2 may be used: TRP A bitmap of 100 bits may always be reported. The constraint is that if only one combination is set, then all Ls in that combination are i may be a non-zero value. For TRPs that are not selected as indicated by the bitmap, the number of SD basis vectors may be taken as 0. - Option 1 N TRP The bitmap of bits may not be reported. The specification may not define bitmap reporting. The UE may only be required to report an indicator for the combination in CSI Part 1. The indicator may include the TRP selection information. - Option 2 L in the set combination i If there is a value of 0, NTRP The bitmap of the bit may not be reported. Whether the bitmap is reported may be configured by RRC using new signaling. i If there is a value of 0 in CSI Part 1, the UE may recognize that bitmap reporting is required in CSI Part 1. In this case, embodiment #1 may be used. - Option 3 N TRP The bitmap of bits may be reported together with the indicator for the combination in CSI Part 1. For TRP#i indicated as selected, the UE shall set a corresponding non-zero value L i Combinations with non-zero corresponding values ​​L may also be reported. i For TRP#i with , the UE may also report a bitmap indicating that TRP#i has been selected. - Option 4 N TRP The number of SD basis vectors for each TRP may be determined by the bitmap of bits and the indicator for the combination in CSI Part 1. TRP If the bitmap of bits indicates that a certain TRP #i is not selected, then for that TRP #i, the corresponding value of the combination L i may be considered as 0. For TRP#i indicated as not selected, the UE shall set a corresponding value L i Combinations with N may be reported. For example, TRP If the bitmap of the bits is

[1010] and the reported combination is the second combination [4,2,2,0] mentioned above, it may mean that the number of SD basis vectors for the four TRPs is [4,0,2,0]. The number of SD basis vectors for the unselected TRP#i may be recognized as 0. The zero value L in the combination i For a TRP#i with , the UE may also report a bitmap indicating that TRP#i is not selected. According to this embodiment, the UE can appropriately report the selected TRP and the value for the number of SD basis vectors per TRP. <Additional Information> [Notification of information to UE] In the above-described embodiment, any information may be notified to the UE (from a network (NW) (e.g., a base station (BS))) (in other words, any information is received from the BS by the UE) using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal / channel (e.g., PDCCH, PDSCH, reference signal), or a combination thereof. When the notification is performed by a MAC CE, the MAC CE may be identified by including a new Logical Channel ID (LCID) that is not defined in existing standards in the MAC subheader. When the notification is made by DCI, the notification may be made by a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used to scramble Cyclic Redundancy Check (CRC) bits assigned to the DCI, the format of the DCI, etc. Furthermore, notification of any information to the UE in the above embodiments may be performed periodically, semi-persistently or aperiodically. [Information notification from UE] In the above-described embodiments, notification of any information from the UE (to the NW) (in other words, transmission / report of any information from the UE to the BS) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal / channel (e.g., PUCCH, PUSCH, PRACH, reference signal), or a combination thereof. When the notification is performed by a MAC CE, the MAC CE may be identified by including a new LCID, which is not defined in existing standards, in the MAC subheader. If the notification is made by UCI, the notification may be transmitted using PUCCH or PUSCH. Furthermore, notification of any information from the UE in the above-described embodiments may be performed periodically, semi-persistently or aperiodically. [Application of each embodiment] At least one of the above-mentioned embodiments may be applied when a specific condition is met, which may be specified in a standard or may be notified to a UE / BS using higher layer signaling / physical layer signaling. At least one of the above embodiments may be applied only to UEs that have reported or support a particular UE capability. The specific UE capabilities may indicate at least one of the following: The maximum number of value combinations for the number of SD basis vectors. ・L for one TRP#i i Candidate value for setting. For example, L i Is the possible value 0 of L supported? For example, i Is the candidate value 1 of L supported? For example, i Is the possible value 6 supported? ・L for all TRP#i i Sum of (total, L1+...+L N_TRP ) ・N TRP Whether bitmap reporting of bits is omitted. Furthermore, the above-mentioned specific UE capability may be a capability that is applied across all frequencies (commonly regardless of frequency), or may be a capability for each frequency (e.g., one or a combination of a cell, band, band combination, BWP, component carrier, etc.), or may be a capability for each frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), or may be a capability for each subcarrier spacing (SubCarrier Spacing (SCS)), or may be a capability for each Feature Set (FS) or Feature Set Per Component-carrier (FSPC). Furthermore, the specific UE capability may be a capability that is applied across all duplexing methods (commonly regardless of the duplexing method), or may be a capability for each duplexing method (e.g., Time Division Duplex (TDD) and Frequency Division Duplex (FDD)). Also, at least one of the above-mentioned embodiments may be applied when the UE is configured / activated / triggered to set / activate / trigger specific information related to the above-mentioned embodiments (or to perform the operations of the above-mentioned embodiments) by higher layer signaling / physical layer signaling. For example, the specific information may be information indicating that the functions of each embodiment are enabled, any RRC parameters for a specific release (e.g., Rel. 18 / 19), etc. If the UE does not support at least one of the specific UE capabilities or is not configured with the specific information, the UE may, for example, apply Rel. 15 / 16 behavior. (Additional Note) With respect to one embodiment of the present disclosure, the following invention is noted. [Appendix 1] A receiver that receives a setting of a plurality of combinations of candidate values ​​of a parameter related to the number of spatial domain basis vectors for N transmission and reception points; A control unit that controls reporting of one combination based on the multiple combinations based on the setting. [Appendix 2] 2. The terminal of claim 1, wherein the plurality of combinations does not include a candidate value of 0. [Appendix 3] 3. The terminal of claim 1 or 2, wherein at least one of the plurality of combinations includes a candidate value of 0. [Appendix 4] The control unit controls reporting of a bitmap having N bits corresponding to the N transmission / reception points, 4. The terminal of any of Supplementary Notes 1 to 3, wherein a number of spatial domain basis vectors for a transmission / reception point corresponding to a value of 0 in the bitmap is 0. (Wireless communication system) A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one or a combination of the wireless communication methods according to the above embodiments of the present disclosure. 12 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 (which may simply be referred to as system 1) may be a system that realizes communication using Long Term Evolution (LTE) or 5th generation mobile communication system New Radio (5G NR) specified by the Third Generation Partnership Project (3GPP). In addition, the wireless communication system 1 may support dual connectivity between a plurality of Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), and the like. In EN-DC, the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (Secondary Node (SN)). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN. The wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (e.g., dual connectivity in which both the MN and the SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))). The wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are arranged in the macrocell C1 and form a small cell C2 that is narrower than the macrocell C1. A user terminal 20 may be located in at least one of the cells. The arrangement and number of each cell and the user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when the base stations 11 and 12 are not distinguished from each other, they will be collectively referred to as a base station 10. The user terminal 20 may be connected to at least one of the multiple base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CCs) and dual connectivity (DC). Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2. For example, FR1 may be a frequency band of 6 GHz or less (sub-6 GHz), and FR2 may be a frequency band higher than 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2. Furthermore, the user terminal 20 may perform communication in each CC using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD). The multiple base stations 10 may be connected by wire (e.g., optical fiber conforming to the Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (e.g., NR communication). For example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station may be called an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) may be called an IAB node. The base station 10 may be connected to the core network 30 directly or via another base station 10. The core network 30 may include at least one of, for example, an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like. The core network 30 may include network functions (Network Functions (NF)) such as, for example, a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), and an Operation, Administration and Maintenance (Management) (OAM). Note that a single network node may provide multiple functions. In addition, communication with an external network (e.g., the Internet) may be performed via the DN. The user terminal 20 may be a terminal compatible with at least one of communication methods such as LTE, LTE-A, and 5G. In the wireless communication system 1, a wireless access scheme based on Orthogonal Frequency Division Multiplexing (OFDM) may be used. For example, in at least one of the downlink (DL) and the uplink (UL), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), or the like may be used. The radio access scheme may be called a waveform. In the wireless communication system 1, other radio access schemes (e.g., other single-carrier transmission schemes, other multi-carrier transmission schemes) may be used as the UL and DL radio access schemes. In the wireless communication system 1, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as the downlink channel. In addition, in the wireless communication system 1, an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel. The PDSCH transmits user data, higher layer control information, a System Information Block (SIB), etc. The PUSCH may transmit user data, higher layer control information, etc. Furthermore, the PBCH may transmit a Master Information Block (MIB). Lower layer control information may be transmitted by the PDCCH. The lower layer control information may include, for example, Downlink Control Information (DCI) including scheduling information of at least one of the PDSCH and the PUSCH. In addition, the DCI for scheduling the PDSCH may be called a DL assignment, a DL DCI, etc., and the DCI for scheduling the PUSCH may be called a UL grant, a UL DCI, etc. In addition, the PDSCH may be replaced with DL data, and the PUSCH may be replaced with UL data. A control resource set (CORESET) and a search space may be utilized for detecting the PDCCH. The CORESET corresponds to resources for searching DCI. The search space corresponds to a search region and a search method for PDCCH candidates. One CORESET may be associated with one or multiple search spaces. The UE may monitor the CORESET associated with a certain search space based on the search space configuration. One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be called a search space set. Note that the terms "search space," "search space set," "search space setting," "search space set setting," "CORESET," "CORESET setting," and the like in the present disclosure may be read as interchangeable terms. The PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.), and a scheduling request (SR). The PRACH may transmit a random access preamble for establishing a connection with a cell. In the present disclosure, a downlink, an uplink, etc. may be expressed without adding "link." Also, various channels may be expressed without adding "Physical" to the beginning of the channels. In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted. In the wireless communication system 1, as the DL-RS, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted. The synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS). A signal block including an SS (PSS, SSS) and a PBCH (and a DMRS for PBCH) may be called an SS / PBCH block, an SS Block (SSB), or the like. In addition, the SS, SSB, and the like may also be called a reference signal. In addition, in the wireless communication system 1, a sounding reference signal (SRS), a demodulation reference signal (DMRS), or the like may be transmitted as an uplink reference signal (UL-RS). Note that the DMRS may be called a user equipment specific reference signal (UE-specific reference signal). (base station) 13 is a diagram showing an example of a configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140. Note that the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140 may each be provided in one or more units. In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and the base station 10 may be assumed to have other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted. The control unit 110 performs overall control of the base station 10. The control unit 110 can be configured with a controller, a control circuit, and the like that are described based on common understanding in the technical field to which the present disclosure relates. The control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc. The control unit 110 may control transmission and reception using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140, measurement, etc. The control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission and reception unit 120. The control unit 110 may perform call processing (setting, release, etc.) of communication channels, status management of the base station 10, management of radio resources, etc. The transceiver unit 120 may include a baseband unit 121, a radio frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212. The transceiver unit 120 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure. The transmitting / receiving unit 120 may be configured as an integrated transmitting / receiving unit, or may be composed of a transmitting unit and a receiving unit. The transmitting unit may be composed of a transmission processing unit 1211 and an RF unit 122. The receiving unit may be composed of a reception processing unit 1212, the RF unit 122, and a measurement unit 123. The transmitting / receiving antenna 130 can be composed of an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna. The transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc. The transceiver 120 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), or the like. The transmitter / receiver unit 120 (transmission processing unit 1211) may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 110, and generate a bit string to be transmitted. The transceiver 120 (transmission processing unit 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal. The transceiver unit 120 (RF unit 122 ) may perform modulation, filtering, amplification, and the like on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 130 . On the other hand, the transceiver unit 120 (RF unit 122) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency signal received by the transceiver antenna 130. The transceiver 120 (reception processing unit 1212) may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, thereby acquiring user data, etc. The transceiver 120 (measurement unit 123) may perform measurements on the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc., based on the received signal. The measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 110. The transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30 (e.g., network nodes providing NF), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20. In addition, the transmitting section and receiving section of the base station 10 in the present disclosure may be configured by at least one of the transmitting / receiving section 120, the transmitting / receiving antenna 130, and the transmission path interface 140. The transceiver unit 120 may transmit a setting of multiple combinations of candidate values ​​of a parameter related to the number of spatial domain basis vectors for the N transmission and reception points. The control unit 110 may control receiving a report of one combination based on the multiple combinations. (User terminal) 14 is a diagram showing an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the control unit 210, the transceiver unit 220, and the transceiver antenna 230 may each include one or more. In this example, the functional blocks of the characteristic parts of the present embodiment are mainly shown, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. Some of the processes of each unit described below may be omitted. The control unit 210 performs overall control of the user terminal 20. The control unit 210 can be configured from a controller, a control circuit, and the like that are described based on common understanding in the technical field to which the present disclosure relates. The control unit 210 may control signal generation, mapping, etc. The control unit 210 may control transmission / reception, measurement, etc. using the transmission / reception unit 220 and the transmission / reception antenna 230. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission / reception unit 220. The transceiver unit 220 may include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212. The transceiver unit 220 may be configured with a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on common understanding in the technical field related to the present disclosure. The transmitting / receiving unit 220 may be configured as an integrated transmitting / receiving unit, or may be configured from a transmitting unit and a receiving unit. The transmitting unit may be configured from a transmission processing unit 2211 and an RF unit 222. The receiving unit may be configured from a reception processing unit 2212, an RF unit 222, and a measurement unit 223. The transmitting / receiving antenna 230 can be composed of an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna. The transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc. The transceiver unit 220 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc. The transceiver unit 220 (transmission processing unit 2211) may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on data, control information, etc. obtained from the control unit 210, and generate a bit string to be transmitted. The transceiver unit 220 (transmission processing unit 2211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal. In addition, whether or not to apply DFT processing may be based on the setting of transform precoding. When transform precoding is enabled for a certain channel (for example, PUSCH), the transceiver unit 220 (transmission processing unit 2211) may perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform, and if not, it is not necessary to perform DFT processing as the above-mentioned transmission processing. The transceiver unit 220 (RF unit 222 ) may perform modulation, filtering, amplification, and the like on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 230 . On the other hand, the transceiver unit 220 (RF unit 222) may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 230. The transceiver unit 220 (reception processing unit 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc. The transceiver 220 (measurement unit 223) may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal. The measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc. The measurement results may be output to the control unit 210. In addition, the transmitting section and receiving section of the user terminal 20 in the present disclosure may be constituted by at least one of the transmitting / receiving section 220 and the transmitting / receiving antenna 230. The transceiver unit 220 may receive a configuration of multiple combinations of candidate values ​​of a parameter related to the number of spatial domain basis vectors for the N transmission and reception points. The control unit 210 may control reporting of one combination based on the multiple combinations based on the configuration. The plurality of combinations may not include the candidate value 0. At least one of the plurality of combinations may include a candidate value of zero. The controller may control reporting of a bitmap having N bits corresponding to the N transmission / reception points, respectively. A number of spatial domain basis vectors for transmission / reception points corresponding to a value 0 in the bitmap may be 0. (Hardware configuration) The block diagrams used in the description of the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. The method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one device that is physically or logically coupled, or may be realized using two or more devices that are physically or logically separated and directly or indirectly connected (for example, using wires, wirelessly, etc.). The functional blocks may be realized by combining the one device or the multiple devices with software. Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment. For example, a functional block (component) that performs the function of transmission may be called a transmitting unit, a transmitter, or the like. In either case, as described above, the method of realization is not particularly limited. For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Figure 15 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to an embodiment. The above-mentioned base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc. In the present disclosure, the terms "apparatus," "circuit," "device," "section," "unit," and the like can be read interchangeably. The hardware configurations of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured to exclude some of the devices. For example, although only one processor 1001 is shown, there may be multiple processors, and the processes may be performed by one processor or by two or more processors simultaneously, sequentially, or in other manners. Additionally, the processor 1001 may be implemented by one or more chips. Each function in the base station 10 and the user terminal 20 is realized, for example, by loading a specified software (program) onto hardware such as a processor 1001 and a memory 1002, so that the processor 1001 performs calculations, controls communications via a communication device 1004, and controls at least one of the reading and writing of data in the memory 1002 and the storage 1003. The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, at least a part of the above-mentioned control unit 110 (210), transmission / reception unit 120 (220), etc. may be realized by the processor 1001. Furthermore, the processor 1001 reads out programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to the programs. As the programs, programs that cause a computer to execute at least a part of the operations described in the above-mentioned embodiments are used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and other functional blocks may be realized in a similar manner. The memory 1002 is a computer-readable recording medium, and may be configured by at least one of, for example, a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), a Random Access Memory (RAM), and other suitable storage media. The memory 1002 may be called a register, a cache, a main memory, etc. The memory 1002 may store a program (program code), a software module, etc. that is executable to implement a wireless communication method according to an embodiment of the present disclosure. Storage 1003 is a computer-readable recording medium, and may be composed of at least one of, for example, a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray (registered trademark) disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, and other suitable storage media. Storage 1003 may also be referred to as an auxiliary storage device. The communication device 1004 is hardware (transmission and reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD). For example, the above-mentioned transmission and reception unit 120 (220), transmission and reception antenna 130 (230), etc. may be realized by the communication device 1004. The transmission and reception unit 120 (220) may be implemented as a transmission unit 120a (220a) and a reception unit 120b (220b) that are physically or logically separated. The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that performs output to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel). In addition, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses between the devices. Furthermore, the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware. (Modification) In addition, the terms described in this disclosure and the terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, a channel, a symbol, and a signal (signal or signaling) may be read as mutually interchangeable. A signal may also be a message. A reference signal may be abbreviated as RS, and may be called a pilot, a pilot signal, or the like depending on the applied standard. A component carrier (CC) may also be called a cell, a frequency carrier, a carrier frequency, or the like. A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology. Here, the numerology may be a communication parameter applied to at least one of the transmission and reception of a signal or channel, and may indicate at least one of, for example, SubCarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame structure, a specific filtering process performed by the transceiver in the frequency domain, and a specific windowing process performed by the transceiver in the time domain. A slot may be composed of one or more symbols (such as an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol) in the time domain. A slot may also be a time unit based on numerology. A slot may include multiple minislots. Each minislot may be composed of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may be composed of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B. A radio frame, a subframe, a slot, a minislot, and a symbol each represent a time unit for transmitting a signal. A different name may be used for the radio frame, the subframe, the slot, the minislot, and the symbol. Note that the time units such as a frame, a subframe, a slot, a minislot, and a symbol in the present disclosure may be read as interchangeable with each other. For example, one subframe may be called a TTI, a plurality of consecutive subframes may be called a TTI, or one slot or one minislot may be called a TTI. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, a minislot, or the like, instead of a subframe. Here, TTI refers to, for example, the minimum time unit of scheduling in wireless communication. For example, in an LTE system, a base station performs scheduling to allocate radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) to each user terminal in TTI units. Note that the definition of TTI is not limited to this. The TTI may be a transmission time unit of a channel-coded data packet (transport block), a code block, a code word, etc., or may be a processing unit of scheduling, link adaptation, etc. When a TTI is given, the time interval (e.g., the number of symbols) in which a transport block, a code block, a code word, etc. are actually mapped may be shorter than the TTI. In addition, when one slot or one minislot is called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) may be the minimum time unit of scheduling. Also, the number of slots (minislots) constituting the minimum time unit of scheduling may be controlled. A TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, etc. A TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, etc. In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length exceeding 1 ms, and a short TTI (e.g., a shortened TTI, etc.) may be interpreted as a TTI having a TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms. A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers included in an RB may be determined based on the numerology. In addition, an RB may include one or more symbols in the time domain and may be one slot, one minislot, one subframe, or one TTI in length. Each of one TTI, one subframe, etc. may be composed of one or more resource blocks. In addition, one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc. Furthermore, a resource block may be composed of one or more resource elements (REs). For example, one RE may be a radio resource region of one subcarrier and one symbol. A Bandwidth Part (BWP), which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a numerology on a carrier, where the common RBs may be identified by the index of the RBs relative to a Common Reference Point of the carrier. PRBs may be defined in a BWP and numbered within the BWP. The BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL). One or more BWPs may be configured in one carrier for a UE. At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal / channel outside the active BWP. Note that the terms "cell", "carrier", etc. in this disclosure may be replaced with "BWP". The above-mentioned structures of radio frames, subframes, slots, minislots, symbols, etc. are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. may be changed in various ways. In addition, the information, parameters, etc. described in the present disclosure may be represented using absolute values, may be represented using relative values ​​from a predetermined value, or may be represented using other corresponding information. For example, a radio resource may be indicated by a predetermined index. The names used for parameters, etc. in this disclosure are not limiting in any way. Furthermore, the formulas, etc. using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not limiting in any way. The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof. Furthermore, information, signals, etc. may be output from a higher layer to a lower layer and / or from a lower layer to a higher layer. Information, signals, etc. may be input / output via multiple network nodes. Input and output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated, or added. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device. The notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, the notification of information in the present disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI) and Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB) and System Information Block (SIB)), Medium Access Control (MAC) signaling), other signals, or a combination thereof. The physical layer signaling may be called Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), etc. The RRC signaling may be called an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc. The MAC signaling may be notified, for example, using a MAC Control Element (CE). In addition, notification of specified information (e.g., notification that "it is X") is not limited to explicit notification, but may be made implicitly (e.g., by not notifying the specified information or by notifying other information). The determination may be made based on a value represented by a single bit (0 or 1), a Boolean value represented by true or false, or by a numerical comparison (e.g., with a predetermined value). Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. Additionally, software, instructions, information, etc. may be transmitted or received over a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave, etc.), then these wired and / or wireless technologies are included within the definition of transmission media. As used in this disclosure, the terms "system" and "network" may be used interchangeably. A "network" may refer to devices included in the network (e.g., base stations). In this disclosure, terms such as "precoding," "precoder," "weight (precoding weight)," "Quasi-Co-Location (QCL)," "Transmission Configuration Indication state (TCI state)," "spatial relation," "spatial domain filter," "transmit power," "phase rotation," "antenna port," "antenna port group," "layer," "number of layers," "rank," "resource," "resource set," "resource group," "beam," "beam width," "beam angle," "antenna," "antenna element," "panel," and the like may be used interchangeably. In the present disclosure, terms such as "Base Station (BS)", "radio base station", "fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission / Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier", etc. may be used interchangeably. A base station may also be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, etc. A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be partitioned into multiple smaller areas, and each smaller area can also be provided with communication services by a base station subsystem (e.g., a small base station for indoor use (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or a base station subsystem that provides communication services in this coverage. In the present disclosure, a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control / operate based on the information. In this disclosure, the terms "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", etc. may be used interchangeably. A mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology. At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc. At least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc. The moving body is a movable object, and the moving speed is arbitrary, and of course includes the case where the moving body is stopped. The moving body includes, but is not limited to, for example, a vehicle, a transport vehicle, an automobile, a motorcycle, a bicycle, a connected car, a shovel car, a bulldozer, a wheel loader, a dump truck, a forklift, a train, a bus, a handcart, a rickshaw, a ship and other watercraft, an airplane, a rocket, an artificial satellite, a drone, a multicopter, a quadcopter, a balloon, and objects mounted thereon. The moving body may also be a moving body that runs autonomously based on an operation command. The moving object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may include a device that does not necessarily move during communication operation. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor. 16 is a diagram showing an example of a vehicle according to an embodiment. The vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, a rotation speed sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60. The drive unit 41 is configured with at least one of an engine, a motor, and a hybrid of an engine and a motor, for example. The steering unit 42 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by a user. The electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (e.g., an input / output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle. The electronic control unit 49 may be called an Electronic Control Unit (ECU). The signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the motor current, a rotation speed signal of the front wheels 46 / rear wheels 47 acquired by a rotation speed sensor 51, an air pressure signal of the front wheels 46 / rear wheels 47 acquired by an air pressure sensor 52, a vehicle speed signal acquired by a vehicle speed sensor 53, an acceleration signal acquired by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 acquired by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 acquired by a brake pedal sensor 56, an operation signal of the shift lever 45 acquired by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by an object detection sensor 58. The information service unit 59 is composed of various devices, such as a car navigation system, an audio system, a speaker, a display, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 59 uses information acquired from an external device via the communication module 60, etc., to provide various information / services (e.g., multimedia information / multimedia services) to the occupants of the vehicle 40. The information service unit 59 may include input devices (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accept input from the outside, and may also include output devices (e.g., a display, a speaker, an LED lamp, a touch panel, etc.) that perform output to the outside. The driving assistance system unit 64 includes various devices for providing functions for preventing accidents and reducing the driver's driving load, such as a millimeter wave radar, a Light Detection and Ranging (LiDAR), a camera, a positioning locator (e.g., a Global Navigation Satellite System (GNSS)), map information (e.g., a High Definition (HD) map, an Autonomous Vehicle (AV) map, etc.), a gyro system (e.g., an Inertial Measurement Unit (IMU), an Inertial Navigation System (INS)), an Artificial Intelligence (AI) chip, and an AI processor, and one or more ECUs for controlling these devices. The driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize a driving assistance function or an automatic driving function. The communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63. For example, the communication module 60 transmits and receives data (information) via the communication port 63 between the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, the left and right rear wheels 47, the axles 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58 provided in the vehicle 40. The communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication. The communication module 60 may be located either inside or outside the electronic control unit 49. The external device may be, for example, the above-mentioned base station 10, user terminal 20, etc. Furthermore, the communication module 60 may be, for example, at least one of the above-mentioned base station 10 and user terminal 20 (may function as at least one of the base station 10 and user terminal 20). The communication module 60 may transmit at least one of the signals from the various sensors 50-58 input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication. The electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may be called an input unit that accepts input. For example, the PUSCH transmitted by the communication module 60 may include information based on the above input. The communication module 60 receives various information (traffic information, signal information, vehicle distance information, etc.) transmitted from an external device, and displays it on an information service unit 59 provided in the vehicle. The information service unit 59 may be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH (or data / information decoded from the PDSCH) received by the communication module 60). Furthermore, the communication module 60 stores various information received from external devices in a memory 62 that can be used by the microprocessor 61. Based on the information stored in the memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and the like provided in the vehicle 40. In addition, the base station in the present disclosure may be read as a user terminal. For example, each aspect / embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (which may be called, for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.). In this case, the user terminal 20 may be configured to have the functions of the base station 10 described above. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink"). For example, an uplink channel, a downlink channel, etc. may be read as a sidelink channel. Similarly, the user terminal in the present disclosure may be interpreted as a base station. In this case, the base station 10 may be configured to have the functions of the user terminal 20 described above. In the present disclosure, an operation performed by a base station may be performed by its upper node in some cases. In a network including one or more network nodes having a base station, it is clear that various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (e.g., Mobility Management Entity (MME), Serving-Gateway (S-GW), etc., but are not limited to these), or a combination thereof. Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched according to implementation. In addition, the processing procedures, sequences, flow charts, etc. of each aspect / embodiment described in this disclosure may be rearranged unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented. Each aspect / embodiment described in the present disclosure may be a Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 6th generation mobile communication system (6G), xth generation mobile communication system (xG (x is, for example, an integer or a decimal)), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.17 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (WiMAX (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (WiMAX (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark)), IEEE 802.34 (WiMAX The present invention may be applied to systems using 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), or other suitable wireless communication methods, or to next-generation systems that are expanded, modified, created, or defined based on these. In addition, the present invention may be applied to a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G). As used in this disclosure, the phrase "based on" does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on." Any reference to an element using a designation such as "first," "second," etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some way. The term "determining" as used in this disclosure may encompass a wide variety of actions. For example, "determining" may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking up in a table, database, or another data structure), ascertaining, and the like. Additionally, "determining" may be considered to be "determining" receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), and the like. Also, "determination" may be considered to be "determining" resolving, selecting, choosing, establishing, comparing, etc. That is, "determination" may be considered to be "determining" some action. Additionally, "judgment (decision)" may be interpreted as "assuming," "expecting," "considering," etc. The "maximum transmit power" in this disclosure may mean the maximum value of transmit power, may mean the nominal UE maximum transmit power, or may mean the rated UE maximum transmit power. As used in this disclosure, the terms "connected" and "coupled," or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between the elements may be physical, logical, or a combination thereof. For example, "connected" may be read as "accessed." In this disclosure, when two elements are connected, they may be considered to be "connected" or "coupled" to one another using one or more wires, cables, printed electrical connections, and the like, as well as using electromagnetic energy having wavelengths in the radio frequency range, microwave range, light (both visible and invisible) range, and the like, as some non-limiting and non-exhaustive examples. In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "coupled" may also be interpreted in the same way as "different." When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Further, when used in this disclosure, the term "or" is not intended to be an exclusive or. In this disclosure, where articles have been added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form. In the present disclosure, terms such as "less than", "less than", "greater than", "more than", "equal to", etc. may be read as interchangeable. In addition, in the present disclosure, terms meaning "good", "bad", "big", "small", "high", "low", "fast", "slow", "wide", "narrow", etc. may be read as interchangeable, not limited to positive, comparative and superlative. In addition, in the present disclosure, terms meaning "good", "bad", "big", "small", "high", "low", "fast", "slow", "wide", "narrow", etc. may be read as interchangeable, not limited to positive, comparative and superlative, as expressions with "ith" (i is any integer) (for example, "best" may be read as "ith best"). In this disclosure, the terms "of," "for," "regarding," "related to," "associated with," etc. may be interpreted interchangeably. Although the invention according to the present disclosure has been described in detail above, it is clear to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as modified and altered forms without departing from the spirit and scope of the invention defined based on the description of the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the invention according to the present disclosure. This application is based on Japanese Patent Application No. 2022-184650, filed on November 18, 2022, the contents of which are incorporated herein in their entirety.

Claims

1. A receiving unit that receives settings regarding a plurality of combinations of the number of spatial domain basis vectors corresponding to N transmit-receive points (TRPs); A control unit that controls to report one combination among the plurality of combinations based on the settings, and controls to report a bitmap having N bits respectively corresponding to the N TRPs, and A terminal, wherein the number of spatial domain basis vectors corresponding to the TRP corresponding to the value 0 in the bitmap is 0.

2. A step of receiving settings regarding a plurality of combinations of the number of spatial domain basis vectors corresponding to N transmit-receive points (TRPs); A step of controlling to report one combination among the plurality of combinations based on the settings, and controlling to report a bitmap having N bits respectively corresponding to the N TRPs, and A wireless communication method for a terminal, wherein the number of spatial domain basis vectors corresponding to the TRP corresponding to the value 0 in the bitmap is 0.

3. A transmitting unit that transmits settings regarding a plurality of combinations of the number of spatial domain basis vectors corresponding to N transmit-receive points (TRPs); A control unit that controls to receive a report of one combination among the plurality of combinations transmitted by a terminal based on the settings, and a bitmap having N bits respectively corresponding to the N TRPs, and A base station, wherein the number of spatial domain basis vectors corresponding to the TRP corresponding to the value 0 in the bitmap is 0.

4. A system having a terminal and a base station, wherein The terminal includes A receiving unit that receives settings regarding a plurality of combinations of the number of spatial domain basis vectors corresponding to N transmit-receive points (TRPs); A control unit that controls to report one combination among the plurality of combinations based on the settings, and controls to report a bitmap having N bits respectively corresponding to the N TRPs, and The base station includes A transmitting unit that transmits the settings, and A system, wherein the number of spatial domain basis vectors corresponding to the TRP corresponding to the value 0 in the bitmap is 0.